fs/smb/server/smb2pdu.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
   4  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
   5  */
   6
   7 #include <linux/inetdevice.h>
   8 #include <net/addrconf.h>
   9 #include <linux/syscalls.h>
  10 #include <linux/namei.h>
  11 #include <linux/statfs.h>
  12 #include <linux/ethtool.h>
  13 #include <linux/falloc.h>
  14 #include <linux/mount.h>
  15 #include <linux/filelock.h>
  16
  17 #include "glob.h"
  18 #include "smbfsctl.h"
  19 #include "oplock.h"
  20 #include "smbacl.h"
  21
  22 #include "auth.h"
  23 #include "asn1.h"
  24 #include "connection.h"
  25 #include "transport_ipc.h"
  26 #include "transport_rdma.h"
  27 #include "vfs.h"
  28 #include "vfs_cache.h"
  29 #include "misc.h"
  30
  31 #include "server.h"
  32 #include "smb_common.h"
  33 #include "smbstatus.h"
  34 #include "ksmbd_work.h"
  35 #include "mgmt/user_config.h"
  36 #include "mgmt/share_config.h"
  37 #include "mgmt/tree_connect.h"
  38 #include "mgmt/user_session.h"
  39 #include "mgmt/ksmbd_ida.h"
  40 #include "ndr.h"
  41
  42 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
  43 {
  44         if (work->next_smb2_rcv_hdr_off) {
  45                 *req = ksmbd_req_buf_next(work);
  46                 *rsp = ksmbd_resp_buf_next(work);
  47         } else {
  48                 *req = smb2_get_msg(work->request_buf);
  49                 *rsp = smb2_get_msg(work->response_buf);
  50         }
  51 }
  52
  53 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
  54
  55 /**
  56  * check_session_id() - check for valid session id in smb header
  57  * @conn:       connection instance
  58  * @id:         session id from smb header
  59  *
  60  * Return:      1 if valid session id, otherwise 0
  61  */
  62 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
  63 {
  64         struct ksmbd_session *sess;
  65
  66         if (id == 0 || id == -1)
  67                 return false;
  68
  69         sess = ksmbd_session_lookup_all(conn, id);
  70         if (sess)
  71                 return true;
  72         pr_err("Invalid user session id: %llu\n", id);
  73         return false;
  74 }
  75
  76 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
  77 {
  78         return xa_load(&sess->ksmbd_chann_list, (long)conn);
  79 }
  80
  81 /**
  82  * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
  83  * @work:       smb work
  84  *
  85  * Return:      0 if there is a tree connection matched or these are
  86  *              skipable commands, otherwise error
  87  */
  88 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
  89 {
  90         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
  91         unsigned int cmd = le16_to_cpu(req_hdr->Command);
  92         unsigned int tree_id;
  93
  94         if (cmd == SMB2_TREE_CONNECT_HE ||
  95             cmd ==  SMB2_CANCEL_HE ||
  96             cmd ==  SMB2_LOGOFF_HE) {
  97                 ksmbd_debug(SMB, "skip to check tree connect request\n");
  98                 return 0;
  99         }
 100
 101         if (xa_empty(&work->sess->tree_conns)) {
 102                 ksmbd_debug(SMB, "NO tree connected\n");
 103                 return -ENOENT;
 104         }
 105
 106         tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
 107
 108         /*
 109          * If request is not the first in Compound request,
 110          * Just validate tree id in header with work->tcon->id.
 111          */
 112         if (work->next_smb2_rcv_hdr_off) {
 113                 if (!work->tcon) {
 114                         pr_err("The first operation in the compound does not have tcon\n");
 115                         return -EINVAL;
 116                 }
 117                 if (tree_id != UINT_MAX && work->tcon->id != tree_id) {
 118                         pr_err("tree id(%u) is different with id(%u) in first operation\n",
 119                                         tree_id, work->tcon->id);
 120                         return -EINVAL;
 121                 }
 122                 return 1;
 123         }
 124
 125         work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
 126         if (!work->tcon) {
 127                 pr_err("Invalid tid %d\n", tree_id);
 128                 return -ENOENT;
 129         }
 130
 131         return 1;
 132 }
 133
 134 /**
 135  * smb2_set_err_rsp() - set error response code on smb response
 136  * @work:       smb work containing response buffer
 137  */
 138 void smb2_set_err_rsp(struct ksmbd_work *work)
 139 {
 140         struct smb2_err_rsp *err_rsp;
 141
 142         if (work->next_smb2_rcv_hdr_off)
 143                 err_rsp = ksmbd_resp_buf_next(work);
 144         else
 145                 err_rsp = smb2_get_msg(work->response_buf);
 146
 147         if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
 148                 int err;
 149
 150                 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
 151                 err_rsp->ErrorContextCount = 0;
 152                 err_rsp->Reserved = 0;
 153                 err_rsp->ByteCount = 0;
 154                 err_rsp->ErrorData[0] = 0;
 155                 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp,
 156                                         __SMB2_HEADER_STRUCTURE_SIZE +
 157                                                 SMB2_ERROR_STRUCTURE_SIZE2);
 158                 if (err)
 159                         work->send_no_response = 1;
 160         }
 161 }
 162
 163 /**
 164  * is_smb2_neg_cmd() - is it smb2 negotiation command
 165  * @work:       smb work containing smb header
 166  *
 167  * Return:      true if smb2 negotiation command, otherwise false
 168  */
 169 bool is_smb2_neg_cmd(struct ksmbd_work *work)
 170 {
 171         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 172
 173         /* is it SMB2 header ? */
 174         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 175                 return false;
 176
 177         /* make sure it is request not response message */
 178         if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
 179                 return false;
 180
 181         if (hdr->Command != SMB2_NEGOTIATE)
 182                 return false;
 183
 184         return true;
 185 }
 186
 187 /**
 188  * is_smb2_rsp() - is it smb2 response
 189  * @work:       smb work containing smb response buffer
 190  *
 191  * Return:      true if smb2 response, otherwise false
 192  */
 193 bool is_smb2_rsp(struct ksmbd_work *work)
 194 {
 195         struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
 196
 197         /* is it SMB2 header ? */
 198         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 199                 return false;
 200
 201         /* make sure it is response not request message */
 202         if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
 203                 return false;
 204
 205         return true;
 206 }
 207
 208 /**
 209  * get_smb2_cmd_val() - get smb command code from smb header
 210  * @work:       smb work containing smb request buffer
 211  *
 212  * Return:      smb2 request command value
 213  */
 214 u16 get_smb2_cmd_val(struct ksmbd_work *work)
 215 {
 216         struct smb2_hdr *rcv_hdr;
 217
 218         if (work->next_smb2_rcv_hdr_off)
 219                 rcv_hdr = ksmbd_req_buf_next(work);
 220         else
 221                 rcv_hdr = smb2_get_msg(work->request_buf);
 222         return le16_to_cpu(rcv_hdr->Command);
 223 }
 224
 225 /**
 226  * set_smb2_rsp_status() - set error response code on smb2 header
 227  * @work:       smb work containing response buffer
 228  * @err:        error response code
 229  */
 230 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
 231 {
 232         struct smb2_hdr *rsp_hdr;
 233
 234         rsp_hdr = smb2_get_msg(work->response_buf);
 235         rsp_hdr->Status = err;
 236
 237         work->iov_idx = 0;
 238         work->iov_cnt = 0;
 239         work->next_smb2_rcv_hdr_off = 0;
 240         smb2_set_err_rsp(work);
 241 }
 242
 243 /**
 244  * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
 245  * @work:       smb work containing smb request buffer
 246  *
 247  * smb2 negotiate response is sent in reply of smb1 negotiate command for
 248  * dialect auto-negotiation.
 249  */
 250 int init_smb2_neg_rsp(struct ksmbd_work *work)
 251 {
 252         struct smb2_hdr *rsp_hdr;
 253         struct smb2_negotiate_rsp *rsp;
 254         struct ksmbd_conn *conn = work->conn;
 255         int err;
 256
 257         rsp_hdr = smb2_get_msg(work->response_buf);
 258         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 259         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 260         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 261         rsp_hdr->CreditRequest = cpu_to_le16(2);
 262         rsp_hdr->Command = SMB2_NEGOTIATE;
 263         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 264         rsp_hdr->NextCommand = 0;
 265         rsp_hdr->MessageId = 0;
 266         rsp_hdr->Id.SyncId.ProcessId = 0;
 267         rsp_hdr->Id.SyncId.TreeId = 0;
 268         rsp_hdr->SessionId = 0;
 269         memset(rsp_hdr->Signature, 0, 16);
 270
 271         rsp = smb2_get_msg(work->response_buf);
 272
 273         WARN_ON(ksmbd_conn_good(conn));
 274
 275         rsp->StructureSize = cpu_to_le16(65);
 276         ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
 277         rsp->DialectRevision = cpu_to_le16(conn->dialect);
 278         /* Not setting conn guid rsp->ServerGUID, as it
 279          * not used by client for identifying connection
 280          */
 281         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
 282         /* Default Max Message Size till SMB2.0, 64K*/
 283         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
 284         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
 285         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
 286
 287         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
 288         rsp->ServerStartTime = 0;
 289
 290         rsp->SecurityBufferOffset = cpu_to_le16(128);
 291         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
 292         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
 293                 le16_to_cpu(rsp->SecurityBufferOffset));
 294         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
 295         if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
 296                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
 297         err = ksmbd_iov_pin_rsp(work, rsp,
 298                                 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH);
 299         if (err)
 300                 return err;
 301         conn->use_spnego = true;
 302
 303         ksmbd_conn_set_need_negotiate(conn);
 304         return 0;
 305 }
 306
 307 /**
 308  * smb2_set_rsp_credits() - set number of credits in response buffer
 309  * @work:       smb work containing smb response buffer
 310  */
 311 int smb2_set_rsp_credits(struct ksmbd_work *work)
 312 {
 313         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 314         struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
 315         struct ksmbd_conn *conn = work->conn;
 316         unsigned short credits_requested, aux_max;
 317         unsigned short credit_charge, credits_granted = 0;
 318
 319         if (work->send_no_response)
 320                 return 0;
 321
 322         hdr->CreditCharge = req_hdr->CreditCharge;
 323
 324         if (conn->total_credits > conn->vals->max_credits) {
 325                 hdr->CreditRequest = 0;
 326                 pr_err("Total credits overflow: %d\n", conn->total_credits);
 327                 return -EINVAL;
 328         }
 329
 330         credit_charge = max_t(unsigned short,
 331                               le16_to_cpu(req_hdr->CreditCharge), 1);
 332         if (credit_charge > conn->total_credits) {
 333                 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
 334                             credit_charge, conn->total_credits);
 335                 return -EINVAL;
 336         }
 337
 338         conn->total_credits -= credit_charge;
 339         conn->outstanding_credits -= credit_charge;
 340         credits_requested = max_t(unsigned short,
 341                                   le16_to_cpu(req_hdr->CreditRequest), 1);
 342
 343         /* according to smb2.credits smbtorture, Windows server
 344          * 2016 or later grant up to 8192 credits at once.
 345          *
 346          * TODO: Need to adjuct CreditRequest value according to
 347          * current cpu load
 348          */
 349         if (hdr->Command == SMB2_NEGOTIATE)
 350                 aux_max = 1;
 351         else
 352                 aux_max = conn->vals->max_credits - conn->total_credits;
 353         credits_granted = min_t(unsigned short, credits_requested, aux_max);
 354
 355         conn->total_credits += credits_granted;
 356         work->credits_granted += credits_granted;
 357
 358         if (!req_hdr->NextCommand) {
 359                 /* Update CreditRequest in last request */
 360                 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
 361         }
 362         ksmbd_debug(SMB,
 363                     "credits: requested[%d] granted[%d] total_granted[%d]\n",
 364                     credits_requested, credits_granted,
 365                     conn->total_credits);
 366         return 0;
 367 }
 368
 369 /**
 370  * init_chained_smb2_rsp() - initialize smb2 chained response
 371  * @work:       smb work containing smb response buffer
 372  */
 373 static void init_chained_smb2_rsp(struct ksmbd_work *work)
 374 {
 375         struct smb2_hdr *req = ksmbd_req_buf_next(work);
 376         struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
 377         struct smb2_hdr *rsp_hdr;
 378         struct smb2_hdr *rcv_hdr;
 379         int next_hdr_offset = 0;
 380         int len, new_len;
 381
 382         /* Len of this response = updated RFC len - offset of previous cmd
 383          * in the compound rsp
 384          */
 385
 386         /* Storing the current local FID which may be needed by subsequent
 387          * command in the compound request
 388          */
 389         if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
 390                 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
 391                 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
 392                 work->compound_sid = le64_to_cpu(rsp->SessionId);
 393         }
 394
 395         len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
 396         next_hdr_offset = le32_to_cpu(req->NextCommand);
 397
 398         new_len = ALIGN(len, 8);
 399         work->iov[work->iov_idx].iov_len += (new_len - len);
 400         inc_rfc1001_len(work->response_buf, new_len - len);
 401         rsp->NextCommand = cpu_to_le32(new_len);
 402
 403         work->next_smb2_rcv_hdr_off += next_hdr_offset;
 404         work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
 405         work->next_smb2_rsp_hdr_off += new_len;
 406         ksmbd_debug(SMB,
 407                     "Compound req new_len = %d rcv off = %d rsp off = %d\n",
 408                     new_len, work->next_smb2_rcv_hdr_off,
 409                     work->next_smb2_rsp_hdr_off);
 410
 411         rsp_hdr = ksmbd_resp_buf_next(work);
 412         rcv_hdr = ksmbd_req_buf_next(work);
 413
 414         if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
 415                 ksmbd_debug(SMB, "related flag should be set\n");
 416                 work->compound_fid = KSMBD_NO_FID;
 417                 work->compound_pfid = KSMBD_NO_FID;
 418         }
 419         memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 420         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 421         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 422         rsp_hdr->Command = rcv_hdr->Command;
 423
 424         /*
 425          * Message is response. We don't grant oplock yet.
 426          */
 427         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
 428                                 SMB2_FLAGS_RELATED_OPERATIONS);
 429         rsp_hdr->NextCommand = 0;
 430         rsp_hdr->MessageId = rcv_hdr->MessageId;
 431         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 432         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 433         rsp_hdr->SessionId = rcv_hdr->SessionId;
 434         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 435 }
 436
 437 /**
 438  * is_chained_smb2_message() - check for chained command
 439  * @work:       smb work containing smb request buffer
 440  *
 441  * Return:      true if chained request, otherwise false
 442  */
 443 bool is_chained_smb2_message(struct ksmbd_work *work)
 444 {
 445         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 446         unsigned int len, next_cmd;
 447
 448         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 449                 return false;
 450
 451         hdr = ksmbd_req_buf_next(work);
 452         next_cmd = le32_to_cpu(hdr->NextCommand);
 453         if (next_cmd > 0) {
 454                 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
 455                         __SMB2_HEADER_STRUCTURE_SIZE >
 456                     get_rfc1002_len(work->request_buf)) {
 457                         pr_err("next command(%u) offset exceeds smb msg size\n",
 458                                next_cmd);
 459                         return false;
 460                 }
 461
 462                 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
 463                     work->response_sz) {
 464                         pr_err("next response offset exceeds response buffer size\n");
 465                         return false;
 466                 }
 467
 468                 ksmbd_debug(SMB, "got SMB2 chained command\n");
 469                 init_chained_smb2_rsp(work);
 470                 return true;
 471         } else if (work->next_smb2_rcv_hdr_off) {
 472                 /*
 473                  * This is last request in chained command,
 474                  * align response to 8 byte
 475                  */
 476                 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
 477                 len = len - get_rfc1002_len(work->response_buf);
 478                 if (len) {
 479                         ksmbd_debug(SMB, "padding len %u\n", len);
 480                         work->iov[work->iov_idx].iov_len += len;
 481                         inc_rfc1001_len(work->response_buf, len);
 482                 }
 483                 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
 484         }
 485         return false;
 486 }
 487
 488 /**
 489  * init_smb2_rsp_hdr() - initialize smb2 response
 490  * @work:       smb work containing smb request buffer
 491  *
 492  * Return:      0
 493  */
 494 int init_smb2_rsp_hdr(struct ksmbd_work *work)
 495 {
 496         struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
 497         struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
 498
 499         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 500         rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
 501         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 502         rsp_hdr->Command = rcv_hdr->Command;
 503
 504         /*
 505          * Message is response. We don't grant oplock yet.
 506          */
 507         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 508         rsp_hdr->NextCommand = 0;
 509         rsp_hdr->MessageId = rcv_hdr->MessageId;
 510         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 511         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 512         rsp_hdr->SessionId = rcv_hdr->SessionId;
 513         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 514
 515         return 0;
 516 }
 517
 518 /**
 519  * smb2_allocate_rsp_buf() - allocate smb2 response buffer
 520  * @work:       smb work containing smb request buffer
 521  *
 522  * Return:      0 on success, otherwise -ENOMEM
 523  */
 524 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
 525 {
 526         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 527         size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
 528         size_t large_sz = small_sz + work->conn->vals->max_trans_size;
 529         size_t sz = small_sz;
 530         int cmd = le16_to_cpu(hdr->Command);
 531
 532         if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
 533                 sz = large_sz;
 534
 535         if (cmd == SMB2_QUERY_INFO_HE) {
 536                 struct smb2_query_info_req *req;
 537
 538                 if (get_rfc1002_len(work->request_buf) <
 539                     offsetof(struct smb2_query_info_req, OutputBufferLength))
 540                         return -EINVAL;
 541
 542                 req = smb2_get_msg(work->request_buf);
 543                 if ((req->InfoType == SMB2_O_INFO_FILE &&
 544                      (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
 545                      req->FileInfoClass == FILE_ALL_INFORMATION)) ||
 546                     req->InfoType == SMB2_O_INFO_SECURITY)
 547                         sz = large_sz;
 548         }
 549
 550         /* allocate large response buf for chained commands */
 551         if (le32_to_cpu(hdr->NextCommand) > 0)
 552                 sz = large_sz;
 553
 554         work->response_buf = kvzalloc(sz, GFP_KERNEL);
 555         if (!work->response_buf)
 556                 return -ENOMEM;
 557
 558         work->response_sz = sz;
 559         return 0;
 560 }
 561
 562 /**
 563  * smb2_check_user_session() - check for valid session for a user
 564  * @work:       smb work containing smb request buffer
 565  *
 566  * Return:      0 on success, otherwise error
 567  */
 568 int smb2_check_user_session(struct ksmbd_work *work)
 569 {
 570         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 571         struct ksmbd_conn *conn = work->conn;
 572         unsigned int cmd = le16_to_cpu(req_hdr->Command);
 573         unsigned long long sess_id;
 574
 575         /*
 576          * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
 577          * require a session id, so no need to validate user session's for
 578          * these commands.
 579          */
 580         if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
 581             cmd == SMB2_SESSION_SETUP_HE)
 582                 return 0;
 583
 584         if (!ksmbd_conn_good(conn))
 585                 return -EIO;
 586
 587         sess_id = le64_to_cpu(req_hdr->SessionId);
 588
 589         /*
 590          * If request is not the first in Compound request,
 591          * Just validate session id in header with work->sess->id.
 592          */
 593         if (work->next_smb2_rcv_hdr_off) {
 594                 if (!work->sess) {
 595                         pr_err("The first operation in the compound does not have sess\n");
 596                         return -EINVAL;
 597                 }
 598                 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) {
 599                         pr_err("session id(%llu) is different with the first operation(%lld)\n",
 600                                         sess_id, work->sess->id);
 601                         return -EINVAL;
 602                 }
 603                 return 1;
 604         }
 605
 606         /* Check for validity of user session */
 607         work->sess = ksmbd_session_lookup_all(conn, sess_id);
 608         if (work->sess)
 609                 return 1;
 610         ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
 611         return -ENOENT;
 612 }
 613
 614 /**
 615  * smb2_get_name() - get filename string from on the wire smb format
 616  * @src:        source buffer
 617  * @maxlen:     maxlen of source string
 618  * @local_nls:  nls_table pointer
 619  *
 620  * Return:      matching converted filename on success, otherwise error ptr
 621  */
 622 static char *
 623 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
 624 {
 625         char *name;
 626
 627         name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
 628         if (IS_ERR(name)) {
 629                 pr_err("failed to get name %ld\n", PTR_ERR(name));
 630                 return name;
 631         }
 632
 633         ksmbd_conv_path_to_unix(name);
 634         ksmbd_strip_last_slash(name);
 635         return name;
 636 }
 637
 638 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
 639 {
 640         struct ksmbd_conn *conn = work->conn;
 641         int id;
 642
 643         id = ksmbd_acquire_async_msg_id(&conn->async_ida);
 644         if (id < 0) {
 645                 pr_err("Failed to alloc async message id\n");
 646                 return id;
 647         }
 648         work->asynchronous = true;
 649         work->async_id = id;
 650
 651         ksmbd_debug(SMB,
 652                     "Send interim Response to inform async request id : %d\n",
 653                     work->async_id);
 654
 655         work->cancel_fn = fn;
 656         work->cancel_argv = arg;
 657
 658         if (list_empty(&work->async_request_entry)) {
 659                 spin_lock(&conn->request_lock);
 660                 list_add_tail(&work->async_request_entry, &conn->async_requests);
 661                 spin_unlock(&conn->request_lock);
 662         }
 663
 664         return 0;
 665 }
 666
 667 void release_async_work(struct ksmbd_work *work)
 668 {
 669         struct ksmbd_conn *conn = work->conn;
 670
 671         spin_lock(&conn->request_lock);
 672         list_del_init(&work->async_request_entry);
 673         spin_unlock(&conn->request_lock);
 674
 675         work->asynchronous = 0;
 676         work->cancel_fn = NULL;
 677         kfree(work->cancel_argv);
 678         work->cancel_argv = NULL;
 679         if (work->async_id) {
 680                 ksmbd_release_id(&conn->async_ida, work->async_id);
 681                 work->async_id = 0;
 682         }
 683 }
 684
 685 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
 686 {
 687         struct smb2_hdr *rsp_hdr;
 688         struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
 689
 690         if (allocate_interim_rsp_buf(in_work)) {
 691                 pr_err("smb_allocate_rsp_buf failed!\n");
 692                 ksmbd_free_work_struct(in_work);
 693                 return;
 694         }
 695
 696         in_work->conn = work->conn;
 697         memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
 698                __SMB2_HEADER_STRUCTURE_SIZE);
 699
 700         rsp_hdr = smb2_get_msg(in_work->response_buf);
 701         rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
 702         rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id);
 703         smb2_set_err_rsp(in_work);
 704         rsp_hdr->Status = status;
 705
 706         ksmbd_conn_write(in_work);
 707         ksmbd_free_work_struct(in_work);
 708 }
 709
 710 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
 711 {
 712         if (S_ISDIR(mode) || S_ISREG(mode))
 713                 return 0;
 714
 715         if (S_ISLNK(mode))
 716                 return IO_REPARSE_TAG_LX_SYMLINK_LE;
 717         else if (S_ISFIFO(mode))
 718                 return IO_REPARSE_TAG_LX_FIFO_LE;
 719         else if (S_ISSOCK(mode))
 720                 return IO_REPARSE_TAG_AF_UNIX_LE;
 721         else if (S_ISCHR(mode))
 722                 return IO_REPARSE_TAG_LX_CHR_LE;
 723         else if (S_ISBLK(mode))
 724                 return IO_REPARSE_TAG_LX_BLK_LE;
 725
 726         return 0;
 727 }
 728
 729 /**
 730  * smb2_get_dos_mode() - get file mode in dos format from unix mode
 731  * @stat:       kstat containing file mode
 732  * @attribute:  attribute flags
 733  *
 734  * Return:      converted dos mode
 735  */
 736 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
 737 {
 738         int attr = 0;
 739
 740         if (S_ISDIR(stat->mode)) {
 741                 attr = FILE_ATTRIBUTE_DIRECTORY |
 742                         (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
 743         } else {
 744                 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
 745                 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
 746                 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
 747                                 FILE_SUPPORTS_SPARSE_FILES))
 748                         attr |= FILE_ATTRIBUTE_SPARSE_FILE;
 749
 750                 if (smb2_get_reparse_tag_special_file(stat->mode))
 751                         attr |= FILE_ATTRIBUTE_REPARSE_POINT;
 752         }
 753
 754         return attr;
 755 }
 756
 757 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
 758                                __le16 hash_id)
 759 {
 760         pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
 761         pneg_ctxt->DataLength = cpu_to_le16(38);
 762         pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
 763         pneg_ctxt->Reserved = cpu_to_le32(0);
 764         pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
 765         get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
 766         pneg_ctxt->HashAlgorithms = hash_id;
 767 }
 768
 769 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
 770                                __le16 cipher_type)
 771 {
 772         pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
 773         pneg_ctxt->DataLength = cpu_to_le16(4);
 774         pneg_ctxt->Reserved = cpu_to_le32(0);
 775         pneg_ctxt->CipherCount = cpu_to_le16(1);
 776         pneg_ctxt->Ciphers[0] = cipher_type;
 777 }
 778
 779 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
 780                                 __le16 sign_algo)
 781 {
 782         pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
 783         pneg_ctxt->DataLength =
 784                 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
 785                         - sizeof(struct smb2_neg_context));
 786         pneg_ctxt->Reserved = cpu_to_le32(0);
 787         pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
 788         pneg_ctxt->SigningAlgorithms[0] = sign_algo;
 789 }
 790
 791 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
 792 {
 793         pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
 794         pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
 795         /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
 796         pneg_ctxt->Name[0] = 0x93;
 797         pneg_ctxt->Name[1] = 0xAD;
 798         pneg_ctxt->Name[2] = 0x25;
 799         pneg_ctxt->Name[3] = 0x50;
 800         pneg_ctxt->Name[4] = 0x9C;
 801         pneg_ctxt->Name[5] = 0xB4;
 802         pneg_ctxt->Name[6] = 0x11;
 803         pneg_ctxt->Name[7] = 0xE7;
 804         pneg_ctxt->Name[8] = 0xB4;
 805         pneg_ctxt->Name[9] = 0x23;
 806         pneg_ctxt->Name[10] = 0x83;
 807         pneg_ctxt->Name[11] = 0xDE;
 808         pneg_ctxt->Name[12] = 0x96;
 809         pneg_ctxt->Name[13] = 0x8B;
 810         pneg_ctxt->Name[14] = 0xCD;
 811         pneg_ctxt->Name[15] = 0x7C;
 812 }
 813
 814 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
 815                                   struct smb2_negotiate_rsp *rsp)
 816 {
 817         char * const pneg_ctxt = (char *)rsp +
 818                         le32_to_cpu(rsp->NegotiateContextOffset);
 819         int neg_ctxt_cnt = 1;
 820         int ctxt_size;
 821
 822         ksmbd_debug(SMB,
 823                     "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
 824         build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
 825                            conn->preauth_info->Preauth_HashId);
 826         ctxt_size = sizeof(struct smb2_preauth_neg_context);
 827
 828         if (conn->cipher_type) {
 829                 /* Round to 8 byte boundary */
 830                 ctxt_size = round_up(ctxt_size, 8);
 831                 ksmbd_debug(SMB,
 832                             "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
 833                 build_encrypt_ctxt((struct smb2_encryption_neg_context *)
 834                                    (pneg_ctxt + ctxt_size),
 835                                    conn->cipher_type);
 836                 neg_ctxt_cnt++;
 837                 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
 838         }
 839
 840         /* compression context not yet supported */
 841         WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
 842
 843         if (conn->posix_ext_supported) {
 844                 ctxt_size = round_up(ctxt_size, 8);
 845                 ksmbd_debug(SMB,
 846                             "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
 847                 build_posix_ctxt((struct smb2_posix_neg_context *)
 848                                  (pneg_ctxt + ctxt_size));
 849                 neg_ctxt_cnt++;
 850                 ctxt_size += sizeof(struct smb2_posix_neg_context);
 851         }
 852
 853         if (conn->signing_negotiated) {
 854                 ctxt_size = round_up(ctxt_size, 8);
 855                 ksmbd_debug(SMB,
 856                             "assemble SMB2_SIGNING_CAPABILITIES context\n");
 857                 build_sign_cap_ctxt((struct smb2_signing_capabilities *)
 858                                     (pneg_ctxt + ctxt_size),
 859                                     conn->signing_algorithm);
 860                 neg_ctxt_cnt++;
 861                 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
 862         }
 863
 864         rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
 865         return ctxt_size + AUTH_GSS_PADDING;
 866 }
 867
 868 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
 869                                   struct smb2_preauth_neg_context *pneg_ctxt,
 870                                   int ctxt_len)
 871 {
 872         /*
 873          * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
 874          * which may not be present. Only check for used HashAlgorithms[1].
 875          */
 876         if (ctxt_len <
 877             sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
 878                 return STATUS_INVALID_PARAMETER;
 879
 880         if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
 881                 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
 882
 883         conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
 884         return STATUS_SUCCESS;
 885 }
 886
 887 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
 888                                 struct smb2_encryption_neg_context *pneg_ctxt,
 889                                 int ctxt_len)
 890 {
 891         int cph_cnt;
 892         int i, cphs_size;
 893
 894         if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
 895                 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
 896                 return;
 897         }
 898
 899         conn->cipher_type = 0;
 900
 901         cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
 902         cphs_size = cph_cnt * sizeof(__le16);
 903
 904         if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
 905             ctxt_len) {
 906                 pr_err("Invalid cipher count(%d)\n", cph_cnt);
 907                 return;
 908         }
 909
 910         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
 911                 return;
 912
 913         for (i = 0; i < cph_cnt; i++) {
 914                 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
 915                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
 916                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
 917                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
 918                         ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
 919                                     pneg_ctxt->Ciphers[i]);
 920                         conn->cipher_type = pneg_ctxt->Ciphers[i];
 921                         break;
 922                 }
 923         }
 924 }
 925
 926 /**
 927  * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
 928  * @conn:       smb connection
 929  *
 930  * Return:      true if connection should be encrypted, else false
 931  */
 932 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
 933 {
 934         if (!conn->ops->generate_encryptionkey)
 935                 return false;
 936
 937         /*
 938          * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
 939          * SMB 3.1.1 uses the cipher_type field.
 940          */
 941         return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
 942             conn->cipher_type;
 943 }
 944
 945 static void decode_compress_ctxt(struct ksmbd_conn *conn,
 946                                  struct smb2_compression_capabilities_context *pneg_ctxt)
 947 {
 948         conn->compress_algorithm = SMB3_COMPRESS_NONE;
 949 }
 950
 951 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
 952                                  struct smb2_signing_capabilities *pneg_ctxt,
 953                                  int ctxt_len)
 954 {
 955         int sign_algo_cnt;
 956         int i, sign_alos_size;
 957
 958         if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
 959                 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
 960                 return;
 961         }
 962
 963         conn->signing_negotiated = false;
 964         sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
 965         sign_alos_size = sign_algo_cnt * sizeof(__le16);
 966
 967         if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
 968             ctxt_len) {
 969                 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
 970                 return;
 971         }
 972
 973         for (i = 0; i < sign_algo_cnt; i++) {
 974                 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
 975                     pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
 976                         ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
 977                                     pneg_ctxt->SigningAlgorithms[i]);
 978                         conn->signing_negotiated = true;
 979                         conn->signing_algorithm =
 980                                 pneg_ctxt->SigningAlgorithms[i];
 981                         break;
 982                 }
 983         }
 984 }
 985
 986 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
 987                                       struct smb2_negotiate_req *req,
 988                                       unsigned int len_of_smb)
 989 {
 990         /* +4 is to account for the RFC1001 len field */
 991         struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
 992         int i = 0, len_of_ctxts;
 993         unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
 994         unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
 995         __le32 status = STATUS_INVALID_PARAMETER;
 996
 997         ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
 998         if (len_of_smb <= offset) {
 999                 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
1000                 return status;
1001         }
1002
1003         len_of_ctxts = len_of_smb - offset;
1004
1005         while (i++ < neg_ctxt_cnt) {
1006                 int clen, ctxt_len;
1007
1008                 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
1009                         break;
1010
1011                 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1012                 clen = le16_to_cpu(pctx->DataLength);
1013                 ctxt_len = clen + sizeof(struct smb2_neg_context);
1014
1015                 if (ctxt_len > len_of_ctxts)
1016                         break;
1017
1018                 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1019                         ksmbd_debug(SMB,
1020                                     "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1021                         if (conn->preauth_info->Preauth_HashId)
1022                                 break;
1023
1024                         status = decode_preauth_ctxt(conn,
1025                                                      (struct smb2_preauth_neg_context *)pctx,
1026                                                      ctxt_len);
1027                         if (status != STATUS_SUCCESS)
1028                                 break;
1029                 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1030                         ksmbd_debug(SMB,
1031                                     "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1032                         if (conn->cipher_type)
1033                                 break;
1034
1035                         decode_encrypt_ctxt(conn,
1036                                             (struct smb2_encryption_neg_context *)pctx,
1037                                             ctxt_len);
1038                 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1039                         ksmbd_debug(SMB,
1040                                     "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1041                         if (conn->compress_algorithm)
1042                                 break;
1043
1044                         decode_compress_ctxt(conn,
1045                                              (struct smb2_compression_capabilities_context *)pctx);
1046                 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1047                         ksmbd_debug(SMB,
1048                                     "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1049                 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1050                         ksmbd_debug(SMB,
1051                                     "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1052                         conn->posix_ext_supported = true;
1053                 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1054                         ksmbd_debug(SMB,
1055                                     "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1056
1057                         decode_sign_cap_ctxt(conn,
1058                                              (struct smb2_signing_capabilities *)pctx,
1059                                              ctxt_len);
1060                 }
1061
1062                 /* offsets must be 8 byte aligned */
1063                 offset = (ctxt_len + 7) & ~0x7;
1064                 len_of_ctxts -= offset;
1065         }
1066         return status;
1067 }
1068
1069 /**
1070  * smb2_handle_negotiate() - handler for smb2 negotiate command
1071  * @work:       smb work containing smb request buffer
1072  *
1073  * Return:      0
1074  */
1075 int smb2_handle_negotiate(struct ksmbd_work *work)
1076 {
1077         struct ksmbd_conn *conn = work->conn;
1078         struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1079         struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1080         int rc = 0;
1081         unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
1082         __le32 status;
1083
1084         ksmbd_debug(SMB, "Received negotiate request\n");
1085         conn->need_neg = false;
1086         if (ksmbd_conn_good(conn)) {
1087                 pr_err("conn->tcp_status is already in CifsGood State\n");
1088                 work->send_no_response = 1;
1089                 return rc;
1090         }
1091
1092         smb2_buf_len = get_rfc1002_len(work->request_buf);
1093         smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1094         if (smb2_neg_size > smb2_buf_len) {
1095                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1096                 rc = -EINVAL;
1097                 goto err_out;
1098         }
1099
1100         if (req->DialectCount == 0) {
1101                 pr_err("malformed packet\n");
1102                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1103                 rc = -EINVAL;
1104                 goto err_out;
1105         }
1106
1107         if (conn->dialect == SMB311_PROT_ID) {
1108                 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1109
1110                 if (smb2_buf_len < nego_ctxt_off) {
1111                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1112                         rc = -EINVAL;
1113                         goto err_out;
1114                 }
1115
1116                 if (smb2_neg_size > nego_ctxt_off) {
1117                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1118                         rc = -EINVAL;
1119                         goto err_out;
1120                 }
1121
1122                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1123                     nego_ctxt_off) {
1124                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1125                         rc = -EINVAL;
1126                         goto err_out;
1127                 }
1128         } else {
1129                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1130                     smb2_buf_len) {
1131                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1132                         rc = -EINVAL;
1133                         goto err_out;
1134                 }
1135         }
1136
1137         conn->cli_cap = le32_to_cpu(req->Capabilities);
1138         switch (conn->dialect) {
1139         case SMB311_PROT_ID:
1140                 conn->preauth_info =
1141                         kzalloc(sizeof(struct preauth_integrity_info),
1142                                 GFP_KERNEL);
1143                 if (!conn->preauth_info) {
1144                         rc = -ENOMEM;
1145                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1146                         goto err_out;
1147                 }
1148
1149                 status = deassemble_neg_contexts(conn, req,
1150                                                  get_rfc1002_len(work->request_buf));
1151                 if (status != STATUS_SUCCESS) {
1152                         pr_err("deassemble_neg_contexts error(0x%x)\n",
1153                                status);
1154                         rsp->hdr.Status = status;
1155                         rc = -EINVAL;
1156                         kfree(conn->preauth_info);
1157                         conn->preauth_info = NULL;
1158                         goto err_out;
1159                 }
1160
1161                 rc = init_smb3_11_server(conn);
1162                 if (rc < 0) {
1163                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1164                         kfree(conn->preauth_info);
1165                         conn->preauth_info = NULL;
1166                         goto err_out;
1167                 }
1168
1169                 ksmbd_gen_preauth_integrity_hash(conn,
1170                                                  work->request_buf,
1171                                                  conn->preauth_info->Preauth_HashValue);
1172                 rsp->NegotiateContextOffset =
1173                                 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1174                 neg_ctxt_len = assemble_neg_contexts(conn, rsp);
1175                 break;
1176         case SMB302_PROT_ID:
1177                 init_smb3_02_server(conn);
1178                 break;
1179         case SMB30_PROT_ID:
1180                 init_smb3_0_server(conn);
1181                 break;
1182         case SMB21_PROT_ID:
1183                 init_smb2_1_server(conn);
1184                 break;
1185         case SMB2X_PROT_ID:
1186         case BAD_PROT_ID:
1187         default:
1188                 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1189                             conn->dialect);
1190                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1191                 rc = -EINVAL;
1192                 goto err_out;
1193         }
1194         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1195
1196         /* For stats */
1197         conn->connection_type = conn->dialect;
1198
1199         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1200         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1201         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1202
1203         memcpy(conn->ClientGUID, req->ClientGUID,
1204                         SMB2_CLIENT_GUID_SIZE);
1205         conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1206
1207         rsp->StructureSize = cpu_to_le16(65);
1208         rsp->DialectRevision = cpu_to_le16(conn->dialect);
1209         /* Not setting conn guid rsp->ServerGUID, as it
1210          * not used by client for identifying server
1211          */
1212         memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1213
1214         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1215         rsp->ServerStartTime = 0;
1216         ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1217                     le32_to_cpu(rsp->NegotiateContextOffset),
1218                     le16_to_cpu(rsp->NegotiateContextCount));
1219
1220         rsp->SecurityBufferOffset = cpu_to_le16(128);
1221         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1222         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1223                                   le16_to_cpu(rsp->SecurityBufferOffset));
1224
1225         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1226         conn->use_spnego = true;
1227
1228         if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1229              server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1230             req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1231                 conn->sign = true;
1232         else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1233                 server_conf.enforced_signing = true;
1234                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1235                 conn->sign = true;
1236         }
1237
1238         conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1239         ksmbd_conn_set_need_negotiate(conn);
1240
1241 err_out:
1242         if (rc)
1243                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1244
1245         if (!rc)
1246                 rc = ksmbd_iov_pin_rsp(work, rsp,
1247                                        sizeof(struct smb2_negotiate_rsp) +
1248                                         AUTH_GSS_LENGTH + neg_ctxt_len);
1249         if (rc < 0)
1250                 smb2_set_err_rsp(work);
1251         return rc;
1252 }
1253
1254 static int alloc_preauth_hash(struct ksmbd_session *sess,
1255                               struct ksmbd_conn *conn)
1256 {
1257         if (sess->Preauth_HashValue)
1258                 return 0;
1259
1260         sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1261                                           PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1262         if (!sess->Preauth_HashValue)
1263                 return -ENOMEM;
1264
1265         return 0;
1266 }
1267
1268 static int generate_preauth_hash(struct ksmbd_work *work)
1269 {
1270         struct ksmbd_conn *conn = work->conn;
1271         struct ksmbd_session *sess = work->sess;
1272         u8 *preauth_hash;
1273
1274         if (conn->dialect != SMB311_PROT_ID)
1275                 return 0;
1276
1277         if (conn->binding) {
1278                 struct preauth_session *preauth_sess;
1279
1280                 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1281                 if (!preauth_sess) {
1282                         preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1283                         if (!preauth_sess)
1284                                 return -ENOMEM;
1285                 }
1286
1287                 preauth_hash = preauth_sess->Preauth_HashValue;
1288         } else {
1289                 if (!sess->Preauth_HashValue)
1290                         if (alloc_preauth_hash(sess, conn))
1291                                 return -ENOMEM;
1292                 preauth_hash = sess->Preauth_HashValue;
1293         }
1294
1295         ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1296         return 0;
1297 }
1298
1299 static int decode_negotiation_token(struct ksmbd_conn *conn,
1300                                     struct negotiate_message *negblob,
1301                                     size_t sz)
1302 {
1303         if (!conn->use_spnego)
1304                 return -EINVAL;
1305
1306         if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1307                 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1308                         conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1309                         conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1310                         conn->use_spnego = false;
1311                 }
1312         }
1313         return 0;
1314 }
1315
1316 static int ntlm_negotiate(struct ksmbd_work *work,
1317                           struct negotiate_message *negblob,
1318                           size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
1319 {
1320         struct challenge_message *chgblob;
1321         unsigned char *spnego_blob = NULL;
1322         u16 spnego_blob_len;
1323         char *neg_blob;
1324         int sz, rc;
1325
1326         ksmbd_debug(SMB, "negotiate phase\n");
1327         rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1328         if (rc)
1329                 return rc;
1330
1331         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1332         chgblob =
1333                 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1334         memset(chgblob, 0, sizeof(struct challenge_message));
1335
1336         if (!work->conn->use_spnego) {
1337                 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1338                 if (sz < 0)
1339                         return -ENOMEM;
1340
1341                 rsp->SecurityBufferLength = cpu_to_le16(sz);
1342                 return 0;
1343         }
1344
1345         sz = sizeof(struct challenge_message);
1346         sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1347
1348         neg_blob = kzalloc(sz, GFP_KERNEL);
1349         if (!neg_blob)
1350                 return -ENOMEM;
1351
1352         chgblob = (struct challenge_message *)neg_blob;
1353         sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1354         if (sz < 0) {
1355                 rc = -ENOMEM;
1356                 goto out;
1357         }
1358
1359         rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1360                                            neg_blob, sz);
1361         if (rc) {
1362                 rc = -ENOMEM;
1363                 goto out;
1364         }
1365
1366         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1367         memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1368         rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1369
1370 out:
1371         kfree(spnego_blob);
1372         kfree(neg_blob);
1373         return rc;
1374 }
1375
1376 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1377                                                   struct smb2_sess_setup_req *req)
1378 {
1379         int sz;
1380
1381         if (conn->use_spnego && conn->mechToken)
1382                 return (struct authenticate_message *)conn->mechToken;
1383
1384         sz = le16_to_cpu(req->SecurityBufferOffset);
1385         return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1386                                                + sz);
1387 }
1388
1389 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1390                                        struct smb2_sess_setup_req *req)
1391 {
1392         struct authenticate_message *authblob;
1393         struct ksmbd_user *user;
1394         char *name;
1395         unsigned int name_off, name_len, secbuf_len;
1396
1397         if (conn->use_spnego && conn->mechToken)
1398                 secbuf_len = conn->mechTokenLen;
1399         else
1400                 secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1401         if (secbuf_len < sizeof(struct authenticate_message)) {
1402                 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1403                 return NULL;
1404         }
1405         authblob = user_authblob(conn, req);
1406         name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1407         name_len = le16_to_cpu(authblob->UserName.Length);
1408
1409         if (secbuf_len < (u64)name_off + name_len)
1410                 return NULL;
1411
1412         name = smb_strndup_from_utf16((const char *)authblob + name_off,
1413                                       name_len,
1414                                       true,
1415                                       conn->local_nls);
1416         if (IS_ERR(name)) {
1417                 pr_err("cannot allocate memory\n");
1418                 return NULL;
1419         }
1420
1421         ksmbd_debug(SMB, "session setup request for user %s\n", name);
1422         user = ksmbd_login_user(name);
1423         kfree(name);
1424         return user;
1425 }
1426
1427 static int ntlm_authenticate(struct ksmbd_work *work,
1428                              struct smb2_sess_setup_req *req,
1429                              struct smb2_sess_setup_rsp *rsp)
1430 {
1431         struct ksmbd_conn *conn = work->conn;
1432         struct ksmbd_session *sess = work->sess;
1433         struct channel *chann = NULL;
1434         struct ksmbd_user *user;
1435         u64 prev_id;
1436         int sz, rc;
1437
1438         ksmbd_debug(SMB, "authenticate phase\n");
1439         if (conn->use_spnego) {
1440                 unsigned char *spnego_blob;
1441                 u16 spnego_blob_len;
1442
1443                 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1444                                                     &spnego_blob_len,
1445                                                     0);
1446                 if (rc)
1447                         return -ENOMEM;
1448
1449                 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1450                 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1451                 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1452                 kfree(spnego_blob);
1453         }
1454
1455         user = session_user(conn, req);
1456         if (!user) {
1457                 ksmbd_debug(SMB, "Unknown user name or an error\n");
1458                 return -EPERM;
1459         }
1460
1461         /* Check for previous session */
1462         prev_id = le64_to_cpu(req->PreviousSessionId);
1463         if (prev_id && prev_id != sess->id)
1464                 destroy_previous_session(conn, user, prev_id);
1465
1466         if (sess->state == SMB2_SESSION_VALID) {
1467                 /*
1468                  * Reuse session if anonymous try to connect
1469                  * on reauthetication.
1470                  */
1471                 if (conn->binding == false && ksmbd_anonymous_user(user)) {
1472                         ksmbd_free_user(user);
1473                         return 0;
1474                 }
1475
1476                 if (!ksmbd_compare_user(sess->user, user)) {
1477                         ksmbd_free_user(user);
1478                         return -EPERM;
1479                 }
1480                 ksmbd_free_user(user);
1481         } else {
1482                 sess->user = user;
1483         }
1484
1485         if (conn->binding == false && user_guest(sess->user)) {
1486                 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1487         } else {
1488                 struct authenticate_message *authblob;
1489
1490                 authblob = user_authblob(conn, req);
1491                 if (conn->use_spnego && conn->mechToken)
1492                         sz = conn->mechTokenLen;
1493                 else
1494                         sz = le16_to_cpu(req->SecurityBufferLength);
1495                 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1496                 if (rc) {
1497                         set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1498                         ksmbd_debug(SMB, "authentication failed\n");
1499                         return -EPERM;
1500                 }
1501         }
1502
1503         /*
1504          * If session state is SMB2_SESSION_VALID, We can assume
1505          * that it is reauthentication. And the user/password
1506          * has been verified, so return it here.
1507          */
1508         if (sess->state == SMB2_SESSION_VALID) {
1509                 if (conn->binding)
1510                         goto binding_session;
1511                 return 0;
1512         }
1513
1514         if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1515              (conn->sign || server_conf.enforced_signing)) ||
1516             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1517                 sess->sign = true;
1518
1519         if (smb3_encryption_negotiated(conn) &&
1520                         !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1521                 rc = conn->ops->generate_encryptionkey(conn, sess);
1522                 if (rc) {
1523                         ksmbd_debug(SMB,
1524                                         "SMB3 encryption key generation failed\n");
1525                         return -EINVAL;
1526                 }
1527                 sess->enc = true;
1528                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1529                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1530                 /*
1531                  * signing is disable if encryption is enable
1532                  * on this session
1533                  */
1534                 sess->sign = false;
1535         }
1536
1537 binding_session:
1538         if (conn->dialect >= SMB30_PROT_ID) {
1539                 chann = lookup_chann_list(sess, conn);
1540                 if (!chann) {
1541                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1542                         if (!chann)
1543                                 return -ENOMEM;
1544
1545                         chann->conn = conn;
1546                         xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1547                 }
1548         }
1549
1550         if (conn->ops->generate_signingkey) {
1551                 rc = conn->ops->generate_signingkey(sess, conn);
1552                 if (rc) {
1553                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1554                         return -EINVAL;
1555                 }
1556         }
1557
1558         if (!ksmbd_conn_lookup_dialect(conn)) {
1559                 pr_err("fail to verify the dialect\n");
1560                 return -ENOENT;
1561         }
1562         return 0;
1563 }
1564
1565 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1566 static int krb5_authenticate(struct ksmbd_work *work,
1567                              struct smb2_sess_setup_req *req,
1568                              struct smb2_sess_setup_rsp *rsp)
1569 {
1570         struct ksmbd_conn *conn = work->conn;
1571         struct ksmbd_session *sess = work->sess;
1572         char *in_blob, *out_blob;
1573         struct channel *chann = NULL;
1574         u64 prev_sess_id;
1575         int in_len, out_len;
1576         int retval;
1577
1578         in_blob = (char *)&req->hdr.ProtocolId +
1579                 le16_to_cpu(req->SecurityBufferOffset);
1580         in_len = le16_to_cpu(req->SecurityBufferLength);
1581         out_blob = (char *)&rsp->hdr.ProtocolId +
1582                 le16_to_cpu(rsp->SecurityBufferOffset);
1583         out_len = work->response_sz -
1584                 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1585
1586         /* Check previous session */
1587         prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1588         if (prev_sess_id && prev_sess_id != sess->id)
1589                 destroy_previous_session(conn, sess->user, prev_sess_id);
1590
1591         if (sess->state == SMB2_SESSION_VALID)
1592                 ksmbd_free_user(sess->user);
1593
1594         retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1595                                          out_blob, &out_len);
1596         if (retval) {
1597                 ksmbd_debug(SMB, "krb5 authentication failed\n");
1598                 return -EINVAL;
1599         }
1600         rsp->SecurityBufferLength = cpu_to_le16(out_len);
1601
1602         if ((conn->sign || server_conf.enforced_signing) ||
1603             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1604                 sess->sign = true;
1605
1606         if (smb3_encryption_negotiated(conn)) {
1607                 retval = conn->ops->generate_encryptionkey(conn, sess);
1608                 if (retval) {
1609                         ksmbd_debug(SMB,
1610                                     "SMB3 encryption key generation failed\n");
1611                         return -EINVAL;
1612                 }
1613                 sess->enc = true;
1614                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1615                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1616                 sess->sign = false;
1617         }
1618
1619         if (conn->dialect >= SMB30_PROT_ID) {
1620                 chann = lookup_chann_list(sess, conn);
1621                 if (!chann) {
1622                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1623                         if (!chann)
1624                                 return -ENOMEM;
1625
1626                         chann->conn = conn;
1627                         xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1628                 }
1629         }
1630
1631         if (conn->ops->generate_signingkey) {
1632                 retval = conn->ops->generate_signingkey(sess, conn);
1633                 if (retval) {
1634                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1635                         return -EINVAL;
1636                 }
1637         }
1638
1639         if (!ksmbd_conn_lookup_dialect(conn)) {
1640                 pr_err("fail to verify the dialect\n");
1641                 return -ENOENT;
1642         }
1643         return 0;
1644 }
1645 #else
1646 static int krb5_authenticate(struct ksmbd_work *work,
1647                              struct smb2_sess_setup_req *req,
1648                              struct smb2_sess_setup_rsp *rsp)
1649 {
1650         return -EOPNOTSUPP;
1651 }
1652 #endif
1653
1654 int smb2_sess_setup(struct ksmbd_work *work)
1655 {
1656         struct ksmbd_conn *conn = work->conn;
1657         struct smb2_sess_setup_req *req;
1658         struct smb2_sess_setup_rsp *rsp;
1659         struct ksmbd_session *sess;
1660         struct negotiate_message *negblob;
1661         unsigned int negblob_len, negblob_off;
1662         int rc = 0;
1663
1664         ksmbd_debug(SMB, "Received request for session setup\n");
1665
1666         WORK_BUFFERS(work, req, rsp);
1667
1668         rsp->StructureSize = cpu_to_le16(9);
1669         rsp->SessionFlags = 0;
1670         rsp->SecurityBufferOffset = cpu_to_le16(72);
1671         rsp->SecurityBufferLength = 0;
1672
1673         ksmbd_conn_lock(conn);
1674         if (!req->hdr.SessionId) {
1675                 sess = ksmbd_smb2_session_create();
1676                 if (!sess) {
1677                         rc = -ENOMEM;
1678                         goto out_err;
1679                 }
1680                 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1681                 rc = ksmbd_session_register(conn, sess);
1682                 if (rc)
1683                         goto out_err;
1684         } else if (conn->dialect >= SMB30_PROT_ID &&
1685                    (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1686                    req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1687                 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1688
1689                 sess = ksmbd_session_lookup_slowpath(sess_id);
1690                 if (!sess) {
1691                         rc = -ENOENT;
1692                         goto out_err;
1693                 }
1694
1695                 if (conn->dialect != sess->dialect) {
1696                         rc = -EINVAL;
1697                         goto out_err;
1698                 }
1699
1700                 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1701                         rc = -EINVAL;
1702                         goto out_err;
1703                 }
1704
1705                 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1706                             SMB2_CLIENT_GUID_SIZE)) {
1707                         rc = -ENOENT;
1708                         goto out_err;
1709                 }
1710
1711                 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1712                         rc = -EACCES;
1713                         goto out_err;
1714                 }
1715
1716                 if (sess->state == SMB2_SESSION_EXPIRED) {
1717                         rc = -EFAULT;
1718                         goto out_err;
1719                 }
1720
1721                 if (ksmbd_conn_need_reconnect(conn)) {
1722                         rc = -EFAULT;
1723                         sess = NULL;
1724                         goto out_err;
1725                 }
1726
1727                 if (ksmbd_session_lookup(conn, sess_id)) {
1728                         rc = -EACCES;
1729                         goto out_err;
1730                 }
1731
1732                 if (user_guest(sess->user)) {
1733                         rc = -EOPNOTSUPP;
1734                         goto out_err;
1735                 }
1736
1737                 conn->binding = true;
1738         } else if ((conn->dialect < SMB30_PROT_ID ||
1739                     server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1740                    (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1741                 sess = NULL;
1742                 rc = -EACCES;
1743                 goto out_err;
1744         } else {
1745                 sess = ksmbd_session_lookup(conn,
1746                                             le64_to_cpu(req->hdr.SessionId));
1747                 if (!sess) {
1748                         rc = -ENOENT;
1749                         goto out_err;
1750                 }
1751
1752                 if (sess->state == SMB2_SESSION_EXPIRED) {
1753                         rc = -EFAULT;
1754                         goto out_err;
1755                 }
1756
1757                 if (ksmbd_conn_need_reconnect(conn)) {
1758                         rc = -EFAULT;
1759                         sess = NULL;
1760                         goto out_err;
1761                 }
1762         }
1763         work->sess = sess;
1764
1765         negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1766         negblob_len = le16_to_cpu(req->SecurityBufferLength);
1767         if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) {
1768                 rc = -EINVAL;
1769                 goto out_err;
1770         }
1771
1772         negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1773                         negblob_off);
1774
1775         if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1776                 if (conn->mechToken) {
1777                         negblob = (struct negotiate_message *)conn->mechToken;
1778                         negblob_len = conn->mechTokenLen;
1779                 }
1780         }
1781
1782         if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1783                 rc = -EINVAL;
1784                 goto out_err;
1785         }
1786
1787         if (server_conf.auth_mechs & conn->auth_mechs) {
1788                 rc = generate_preauth_hash(work);
1789                 if (rc)
1790                         goto out_err;
1791
1792                 if (conn->preferred_auth_mech &
1793                                 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1794                         rc = krb5_authenticate(work, req, rsp);
1795                         if (rc) {
1796                                 rc = -EINVAL;
1797                                 goto out_err;
1798                         }
1799
1800                         if (!ksmbd_conn_need_reconnect(conn)) {
1801                                 ksmbd_conn_set_good(conn);
1802                                 sess->state = SMB2_SESSION_VALID;
1803                         }
1804                         kfree(sess->Preauth_HashValue);
1805                         sess->Preauth_HashValue = NULL;
1806                 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1807                         if (negblob->MessageType == NtLmNegotiate) {
1808                                 rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1809                                 if (rc)
1810                                         goto out_err;
1811                                 rsp->hdr.Status =
1812                                         STATUS_MORE_PROCESSING_REQUIRED;
1813                         } else if (negblob->MessageType == NtLmAuthenticate) {
1814                                 rc = ntlm_authenticate(work, req, rsp);
1815                                 if (rc)
1816                                         goto out_err;
1817
1818                                 if (!ksmbd_conn_need_reconnect(conn)) {
1819                                         ksmbd_conn_set_good(conn);
1820                                         sess->state = SMB2_SESSION_VALID;
1821                                 }
1822                                 if (conn->binding) {
1823                                         struct preauth_session *preauth_sess;
1824
1825                                         preauth_sess =
1826                                                 ksmbd_preauth_session_lookup(conn, sess->id);
1827                                         if (preauth_sess) {
1828                                                 list_del(&preauth_sess->preauth_entry);
1829                                                 kfree(preauth_sess);
1830                                         }
1831                                 }
1832                                 kfree(sess->Preauth_HashValue);
1833                                 sess->Preauth_HashValue = NULL;
1834                         } else {
1835                                 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1836                                                 le32_to_cpu(negblob->MessageType));
1837                                 rc = -EINVAL;
1838                         }
1839                 } else {
1840                         /* TODO: need one more negotiation */
1841                         pr_err("Not support the preferred authentication\n");
1842                         rc = -EINVAL;
1843                 }
1844         } else {
1845                 pr_err("Not support authentication\n");
1846                 rc = -EINVAL;
1847         }
1848
1849 out_err:
1850         if (rc == -EINVAL)
1851                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1852         else if (rc == -ENOENT)
1853                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1854         else if (rc == -EACCES)
1855                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1856         else if (rc == -EFAULT)
1857                 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1858         else if (rc == -ENOMEM)
1859                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1860         else if (rc == -EOPNOTSUPP)
1861                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1862         else if (rc)
1863                 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1864
1865         if (conn->use_spnego && conn->mechToken) {
1866                 kfree(conn->mechToken);
1867                 conn->mechToken = NULL;
1868         }
1869
1870         if (rc < 0) {
1871                 /*
1872                  * SecurityBufferOffset should be set to zero
1873                  * in session setup error response.
1874                  */
1875                 rsp->SecurityBufferOffset = 0;
1876
1877                 if (sess) {
1878                         bool try_delay = false;
1879
1880                         /*
1881                          * To avoid dictionary attacks (repeated session setups rapidly sent) to
1882                          * connect to server, ksmbd make a delay of a 5 seconds on session setup
1883                          * failure to make it harder to send enough random connection requests
1884                          * to break into a server.
1885                          */
1886                         if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1887                                 try_delay = true;
1888
1889                         sess->last_active = jiffies;
1890                         sess->state = SMB2_SESSION_EXPIRED;
1891                         if (try_delay) {
1892                                 ksmbd_conn_set_need_reconnect(conn);
1893                                 ssleep(5);
1894                                 ksmbd_conn_set_need_negotiate(conn);
1895                         }
1896                 }
1897                 smb2_set_err_rsp(work);
1898         } else {
1899                 unsigned int iov_len;
1900
1901                 if (rsp->SecurityBufferLength)
1902                         iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1903                                 le16_to_cpu(rsp->SecurityBufferLength);
1904                 else
1905                         iov_len = sizeof(struct smb2_sess_setup_rsp);
1906                 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1907                 if (rc)
1908                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1909         }
1910
1911         ksmbd_conn_unlock(conn);
1912         return rc;
1913 }
1914
1915 /**
1916  * smb2_tree_connect() - handler for smb2 tree connect command
1917  * @work:       smb work containing smb request buffer
1918  *
1919  * Return:      0 on success, otherwise error
1920  */
1921 int smb2_tree_connect(struct ksmbd_work *work)
1922 {
1923         struct ksmbd_conn *conn = work->conn;
1924         struct smb2_tree_connect_req *req;
1925         struct smb2_tree_connect_rsp *rsp;
1926         struct ksmbd_session *sess = work->sess;
1927         char *treename = NULL, *name = NULL;
1928         struct ksmbd_tree_conn_status status;
1929         struct ksmbd_share_config *share = NULL;
1930         int rc = -EINVAL;
1931
1932         WORK_BUFFERS(work, req, rsp);
1933
1934         treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset),
1935                                           le16_to_cpu(req->PathLength), true,
1936                                           conn->local_nls);
1937         if (IS_ERR(treename)) {
1938                 pr_err("treename is NULL\n");
1939                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1940                 goto out_err1;
1941         }
1942
1943         name = ksmbd_extract_sharename(conn->um, treename);
1944         if (IS_ERR(name)) {
1945                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1946                 goto out_err1;
1947         }
1948
1949         ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1950                     name, treename);
1951
1952         status = ksmbd_tree_conn_connect(conn, sess, name);
1953         if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1954                 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1955         else
1956                 goto out_err1;
1957
1958         share = status.tree_conn->share_conf;
1959         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1960                 ksmbd_debug(SMB, "IPC share path request\n");
1961                 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1962                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1963                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1964                         FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1965                         FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1966                         FILE_SYNCHRONIZE_LE;
1967         } else {
1968                 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1969                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1970                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1971                 if (test_tree_conn_flag(status.tree_conn,
1972                                         KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1973                         rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1974                                 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1975                                 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1976                                 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1977                                 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1978                                 FILE_SYNCHRONIZE_LE;
1979                 }
1980         }
1981
1982         status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1983         if (conn->posix_ext_supported)
1984                 status.tree_conn->posix_extensions = true;
1985
1986         write_lock(&sess->tree_conns_lock);
1987         status.tree_conn->t_state = TREE_CONNECTED;
1988         write_unlock(&sess->tree_conns_lock);
1989         rsp->StructureSize = cpu_to_le16(16);
1990 out_err1:
1991         if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && share &&
1992             test_share_config_flag(share,
1993                                    KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
1994                 rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY;
1995         else
1996                 rsp->Capabilities = 0;
1997         rsp->Reserved = 0;
1998         /* default manual caching */
1999         rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2000
2001         rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2002         if (rc)
2003                 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2004
2005         if (!IS_ERR(treename))
2006                 kfree(treename);
2007         if (!IS_ERR(name))
2008                 kfree(name);
2009
2010         switch (status.ret) {
2011         case KSMBD_TREE_CONN_STATUS_OK:
2012                 rsp->hdr.Status = STATUS_SUCCESS;
2013                 rc = 0;
2014                 break;
2015         case -ESTALE:
2016         case -ENOENT:
2017         case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2018                 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2019                 break;
2020         case -ENOMEM:
2021         case KSMBD_TREE_CONN_STATUS_NOMEM:
2022                 rsp->hdr.Status = STATUS_NO_MEMORY;
2023                 break;
2024         case KSMBD_TREE_CONN_STATUS_ERROR:
2025         case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2026         case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2027                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2028                 break;
2029         case -EINVAL:
2030                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2031                 break;
2032         default:
2033                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2034         }
2035
2036         if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2037                 smb2_set_err_rsp(work);
2038
2039         return rc;
2040 }
2041
2042 /**
2043  * smb2_create_open_flags() - convert smb open flags to unix open flags
2044  * @file_present:       is file already present
2045  * @access:             file access flags
2046  * @disposition:        file disposition flags
2047  * @may_flags:          set with MAY_ flags
2048  *
2049  * Return:      file open flags
2050  */
2051 static int smb2_create_open_flags(bool file_present, __le32 access,
2052                                   __le32 disposition,
2053                                   int *may_flags)
2054 {
2055         int oflags = O_NONBLOCK | O_LARGEFILE;
2056
2057         if (access & FILE_READ_DESIRED_ACCESS_LE &&
2058             access & FILE_WRITE_DESIRE_ACCESS_LE) {
2059                 oflags |= O_RDWR;
2060                 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2061         } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2062                 oflags |= O_WRONLY;
2063                 *may_flags = MAY_OPEN | MAY_WRITE;
2064         } else {
2065                 oflags |= O_RDONLY;
2066                 *may_flags = MAY_OPEN | MAY_READ;
2067         }
2068
2069         if (access == FILE_READ_ATTRIBUTES_LE)
2070                 oflags |= O_PATH;
2071
2072         if (file_present) {
2073                 switch (disposition & FILE_CREATE_MASK_LE) {
2074                 case FILE_OPEN_LE:
2075                 case FILE_CREATE_LE:
2076                         break;
2077                 case FILE_SUPERSEDE_LE:
2078                 case FILE_OVERWRITE_LE:
2079                 case FILE_OVERWRITE_IF_LE:
2080                         oflags |= O_TRUNC;
2081                         break;
2082                 default:
2083                         break;
2084                 }
2085         } else {
2086                 switch (disposition & FILE_CREATE_MASK_LE) {
2087                 case FILE_SUPERSEDE_LE:
2088                 case FILE_CREATE_LE:
2089                 case FILE_OPEN_IF_LE:
2090                 case FILE_OVERWRITE_IF_LE:
2091                         oflags |= O_CREAT;
2092                         break;
2093                 case FILE_OPEN_LE:
2094                 case FILE_OVERWRITE_LE:
2095                         oflags &= ~O_CREAT;
2096                         break;
2097                 default:
2098                         break;
2099                 }
2100         }
2101
2102         return oflags;
2103 }
2104
2105 /**
2106  * smb2_tree_disconnect() - handler for smb tree connect request
2107  * @work:       smb work containing request buffer
2108  *
2109  * Return:      0
2110  */
2111 int smb2_tree_disconnect(struct ksmbd_work *work)
2112 {
2113         struct smb2_tree_disconnect_rsp *rsp;
2114         struct smb2_tree_disconnect_req *req;
2115         struct ksmbd_session *sess = work->sess;
2116         struct ksmbd_tree_connect *tcon = work->tcon;
2117         int err;
2118
2119         WORK_BUFFERS(work, req, rsp);
2120
2121         ksmbd_debug(SMB, "request\n");
2122
2123         if (!tcon) {
2124                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2125
2126                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2127                 err = -ENOENT;
2128                 goto err_out;
2129         }
2130
2131         ksmbd_close_tree_conn_fds(work);
2132
2133         write_lock(&sess->tree_conns_lock);
2134         if (tcon->t_state == TREE_DISCONNECTED) {
2135                 write_unlock(&sess->tree_conns_lock);
2136                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2137                 err = -ENOENT;
2138                 goto err_out;
2139         }
2140
2141         WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2142         tcon->t_state = TREE_DISCONNECTED;
2143         write_unlock(&sess->tree_conns_lock);
2144
2145         err = ksmbd_tree_conn_disconnect(sess, tcon);
2146         if (err) {
2147                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2148                 goto err_out;
2149         }
2150
2151         work->tcon = NULL;
2152
2153         rsp->StructureSize = cpu_to_le16(4);
2154         err = ksmbd_iov_pin_rsp(work, rsp,
2155                                 sizeof(struct smb2_tree_disconnect_rsp));
2156         if (err) {
2157                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2158                 goto err_out;
2159         }
2160
2161         return 0;
2162
2163 err_out:
2164         smb2_set_err_rsp(work);
2165         return err;
2166
2167 }
2168
2169 /**
2170  * smb2_session_logoff() - handler for session log off request
2171  * @work:       smb work containing request buffer
2172  *
2173  * Return:      0
2174  */
2175 int smb2_session_logoff(struct ksmbd_work *work)
2176 {
2177         struct ksmbd_conn *conn = work->conn;
2178         struct smb2_logoff_req *req;
2179         struct smb2_logoff_rsp *rsp;
2180         struct ksmbd_session *sess;
2181         u64 sess_id;
2182         int err;
2183
2184         WORK_BUFFERS(work, req, rsp);
2185
2186         ksmbd_debug(SMB, "request\n");
2187
2188         ksmbd_conn_lock(conn);
2189         if (!ksmbd_conn_good(conn)) {
2190                 ksmbd_conn_unlock(conn);
2191                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2192                 smb2_set_err_rsp(work);
2193                 return -ENOENT;
2194         }
2195         sess_id = le64_to_cpu(req->hdr.SessionId);
2196         ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2197         ksmbd_conn_unlock(conn);
2198
2199         ksmbd_close_session_fds(work);
2200         ksmbd_conn_wait_idle(conn, sess_id);
2201
2202         /*
2203          * Re-lookup session to validate if session is deleted
2204          * while waiting request complete
2205          */
2206         sess = ksmbd_session_lookup_all(conn, sess_id);
2207         if (ksmbd_tree_conn_session_logoff(sess)) {
2208                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2209                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2210                 smb2_set_err_rsp(work);
2211                 return -ENOENT;
2212         }
2213
2214         ksmbd_destroy_file_table(&sess->file_table);
2215         sess->state = SMB2_SESSION_EXPIRED;
2216
2217         ksmbd_free_user(sess->user);
2218         sess->user = NULL;
2219         ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2220
2221         rsp->StructureSize = cpu_to_le16(4);
2222         err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2223         if (err) {
2224                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2225                 smb2_set_err_rsp(work);
2226                 return err;
2227         }
2228         return 0;
2229 }
2230
2231 /**
2232  * create_smb2_pipe() - create IPC pipe
2233  * @work:       smb work containing request buffer
2234  *
2235  * Return:      0 on success, otherwise error
2236  */
2237 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2238 {
2239         struct smb2_create_rsp *rsp;
2240         struct smb2_create_req *req;
2241         int id;
2242         int err;
2243         char *name;
2244
2245         WORK_BUFFERS(work, req, rsp);
2246
2247         name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2248                                       1, work->conn->local_nls);
2249         if (IS_ERR(name)) {
2250                 rsp->hdr.Status = STATUS_NO_MEMORY;
2251                 err = PTR_ERR(name);
2252                 goto out;
2253         }
2254
2255         id = ksmbd_session_rpc_open(work->sess, name);
2256         if (id < 0) {
2257                 pr_err("Unable to open RPC pipe: %d\n", id);
2258                 err = id;
2259                 goto out;
2260         }
2261
2262         rsp->hdr.Status = STATUS_SUCCESS;
2263         rsp->StructureSize = cpu_to_le16(89);
2264         rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2265         rsp->Flags = 0;
2266         rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2267
2268         rsp->CreationTime = cpu_to_le64(0);
2269         rsp->LastAccessTime = cpu_to_le64(0);
2270         rsp->ChangeTime = cpu_to_le64(0);
2271         rsp->AllocationSize = cpu_to_le64(0);
2272         rsp->EndofFile = cpu_to_le64(0);
2273         rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2274         rsp->Reserved2 = 0;
2275         rsp->VolatileFileId = id;
2276         rsp->PersistentFileId = 0;
2277         rsp->CreateContextsOffset = 0;
2278         rsp->CreateContextsLength = 0;
2279
2280         err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2281         if (err)
2282                 goto out;
2283
2284         kfree(name);
2285         return 0;
2286
2287 out:
2288         switch (err) {
2289         case -EINVAL:
2290                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2291                 break;
2292         case -ENOSPC:
2293         case -ENOMEM:
2294                 rsp->hdr.Status = STATUS_NO_MEMORY;
2295                 break;
2296         }
2297
2298         if (!IS_ERR(name))
2299                 kfree(name);
2300
2301         smb2_set_err_rsp(work);
2302         return err;
2303 }
2304
2305 /**
2306  * smb2_set_ea() - handler for setting extended attributes using set
2307  *              info command
2308  * @eabuf:      set info command buffer
2309  * @buf_len:    set info command buffer length
2310  * @path:       dentry path for get ea
2311  * @get_write:  get write access to a mount
2312  *
2313  * Return:      0 on success, otherwise error
2314  */
2315 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2316                        const struct path *path, bool get_write)
2317 {
2318         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2319         char *attr_name = NULL, *value;
2320         int rc = 0;
2321         unsigned int next = 0;
2322
2323         if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2324                         le16_to_cpu(eabuf->EaValueLength))
2325                 return -EINVAL;
2326
2327         attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2328         if (!attr_name)
2329                 return -ENOMEM;
2330
2331         do {
2332                 if (!eabuf->EaNameLength)
2333                         goto next;
2334
2335                 ksmbd_debug(SMB,
2336                             "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2337                             eabuf->name, eabuf->EaNameLength,
2338                             le16_to_cpu(eabuf->EaValueLength),
2339                             le32_to_cpu(eabuf->NextEntryOffset));
2340
2341                 if (eabuf->EaNameLength >
2342                     (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2343                         rc = -EINVAL;
2344                         break;
2345                 }
2346
2347                 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2348                 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2349                        eabuf->EaNameLength);
2350                 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2351                 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2352
2353                 if (!eabuf->EaValueLength) {
2354                         rc = ksmbd_vfs_casexattr_len(idmap,
2355                                                      path->dentry,
2356                                                      attr_name,
2357                                                      XATTR_USER_PREFIX_LEN +
2358                                                      eabuf->EaNameLength);
2359
2360                         /* delete the EA only when it exits */
2361                         if (rc > 0) {
2362                                 rc = ksmbd_vfs_remove_xattr(idmap,
2363                                                             path,
2364                                                             attr_name);
2365
2366                                 if (rc < 0) {
2367                                         ksmbd_debug(SMB,
2368                                                     "remove xattr failed(%d)\n",
2369                                                     rc);
2370                                         break;
2371                                 }
2372                         }
2373
2374                         /* if the EA doesn't exist, just do nothing. */
2375                         rc = 0;
2376                 } else {
2377                         rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2378                                                 le16_to_cpu(eabuf->EaValueLength),
2379                                                 0, true);
2380                         if (rc < 0) {
2381                                 ksmbd_debug(SMB,
2382                                             "ksmbd_vfs_setxattr is failed(%d)\n",
2383                                             rc);
2384                                 break;
2385                         }
2386                 }
2387
2388 next:
2389                 next = le32_to_cpu(eabuf->NextEntryOffset);
2390                 if (next == 0 || buf_len < next)
2391                         break;
2392                 buf_len -= next;
2393                 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2394                 if (buf_len < sizeof(struct smb2_ea_info)) {
2395                         rc = -EINVAL;
2396                         break;
2397                 }
2398
2399                 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2400                                 le16_to_cpu(eabuf->EaValueLength)) {
2401                         rc = -EINVAL;
2402                         break;
2403                 }
2404         } while (next != 0);
2405
2406         kfree(attr_name);
2407         return rc;
2408 }
2409
2410 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2411                                                struct ksmbd_file *fp,
2412                                                char *stream_name, int s_type)
2413 {
2414         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2415         size_t xattr_stream_size;
2416         char *xattr_stream_name;
2417         int rc;
2418
2419         rc = ksmbd_vfs_xattr_stream_name(stream_name,
2420                                          &xattr_stream_name,
2421                                          &xattr_stream_size,
2422                                          s_type);
2423         if (rc)
2424                 return rc;
2425
2426         fp->stream.name = xattr_stream_name;
2427         fp->stream.size = xattr_stream_size;
2428
2429         /* Check if there is stream prefix in xattr space */
2430         rc = ksmbd_vfs_casexattr_len(idmap,
2431                                      path->dentry,
2432                                      xattr_stream_name,
2433                                      xattr_stream_size);
2434         if (rc >= 0)
2435                 return 0;
2436
2437         if (fp->cdoption == FILE_OPEN_LE) {
2438                 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2439                 return -EBADF;
2440         }
2441
2442         rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
2443         if (rc < 0)
2444                 pr_err("Failed to store XATTR stream name :%d\n", rc);
2445         return 0;
2446 }
2447
2448 static int smb2_remove_smb_xattrs(const struct path *path)
2449 {
2450         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2451         char *name, *xattr_list = NULL;
2452         ssize_t xattr_list_len;
2453         int err = 0;
2454
2455         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2456         if (xattr_list_len < 0) {
2457                 goto out;
2458         } else if (!xattr_list_len) {
2459                 ksmbd_debug(SMB, "empty xattr in the file\n");
2460                 goto out;
2461         }
2462
2463         for (name = xattr_list; name - xattr_list < xattr_list_len;
2464                         name += strlen(name) + 1) {
2465                 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2466
2467                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2468                     !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2469                              STREAM_PREFIX_LEN)) {
2470                         err = ksmbd_vfs_remove_xattr(idmap, path,
2471                                                      name);
2472                         if (err)
2473                                 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2474                                             name);
2475                 }
2476         }
2477 out:
2478         kvfree(xattr_list);
2479         return err;
2480 }
2481
2482 static int smb2_create_truncate(const struct path *path)
2483 {
2484         int rc = vfs_truncate(path, 0);
2485
2486         if (rc) {
2487                 pr_err("vfs_truncate failed, rc %d\n", rc);
2488                 return rc;
2489         }
2490
2491         rc = smb2_remove_smb_xattrs(path);
2492         if (rc == -EOPNOTSUPP)
2493                 rc = 0;
2494         if (rc)
2495                 ksmbd_debug(SMB,
2496                             "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2497                             rc);
2498         return rc;
2499 }
2500
2501 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2502                             struct ksmbd_file *fp)
2503 {
2504         struct xattr_dos_attrib da = {0};
2505         int rc;
2506
2507         if (!test_share_config_flag(tcon->share_conf,
2508                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2509                 return;
2510
2511         da.version = 4;
2512         da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2513         da.itime = da.create_time = fp->create_time;
2514         da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2515                 XATTR_DOSINFO_ITIME;
2516
2517         rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true);
2518         if (rc)
2519                 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2520 }
2521
2522 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2523                                const struct path *path, struct ksmbd_file *fp)
2524 {
2525         struct xattr_dos_attrib da;
2526         int rc;
2527
2528         fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2529
2530         /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2531         if (!test_share_config_flag(tcon->share_conf,
2532                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2533                 return;
2534
2535         rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2536                                             path->dentry, &da);
2537         if (rc > 0) {
2538                 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2539                 fp->create_time = da.create_time;
2540                 fp->itime = da.itime;
2541         }
2542 }
2543
2544 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2545                       struct path *path, char *name, int open_flags,
2546                       umode_t posix_mode, bool is_dir)
2547 {
2548         struct ksmbd_tree_connect *tcon = work->tcon;
2549         struct ksmbd_share_config *share = tcon->share_conf;
2550         umode_t mode;
2551         int rc;
2552
2553         if (!(open_flags & O_CREAT))
2554                 return -EBADF;
2555
2556         ksmbd_debug(SMB, "file does not exist, so creating\n");
2557         if (is_dir == true) {
2558                 ksmbd_debug(SMB, "creating directory\n");
2559
2560                 mode = share_config_directory_mode(share, posix_mode);
2561                 rc = ksmbd_vfs_mkdir(work, name, mode);
2562                 if (rc)
2563                         return rc;
2564         } else {
2565                 ksmbd_debug(SMB, "creating regular file\n");
2566
2567                 mode = share_config_create_mode(share, posix_mode);
2568                 rc = ksmbd_vfs_create(work, name, mode);
2569                 if (rc)
2570                         return rc;
2571         }
2572
2573         rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2574         if (rc) {
2575                 pr_err("cannot get linux path (%s), err = %d\n",
2576                        name, rc);
2577                 return rc;
2578         }
2579         return 0;
2580 }
2581
2582 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2583                                  struct smb2_create_req *req,
2584                                  const struct path *path)
2585 {
2586         struct create_context *context;
2587         struct create_sd_buf_req *sd_buf;
2588
2589         if (!req->CreateContextsOffset)
2590                 return -ENOENT;
2591
2592         /* Parse SD BUFFER create contexts */
2593         context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2594         if (!context)
2595                 return -ENOENT;
2596         else if (IS_ERR(context))
2597                 return PTR_ERR(context);
2598
2599         ksmbd_debug(SMB,
2600                     "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2601         sd_buf = (struct create_sd_buf_req *)context;
2602         if (le16_to_cpu(context->DataOffset) +
2603             le32_to_cpu(context->DataLength) <
2604             sizeof(struct create_sd_buf_req))
2605                 return -EINVAL;
2606         return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2607                             le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
2608 }
2609
2610 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2611                              struct mnt_idmap *idmap,
2612                              struct inode *inode)
2613 {
2614         vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2615         vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2616
2617         fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2618         fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2619         fattr->cf_mode = inode->i_mode;
2620         fattr->cf_acls = NULL;
2621         fattr->cf_dacls = NULL;
2622
2623         if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2624                 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2625                 if (S_ISDIR(inode->i_mode))
2626                         fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2627         }
2628 }
2629
2630 enum {
2631         DURABLE_RECONN_V2 = 1,
2632         DURABLE_RECONN,
2633         DURABLE_REQ_V2,
2634         DURABLE_REQ,
2635 };
2636
2637 struct durable_info {
2638         struct ksmbd_file *fp;
2639         unsigned short int type;
2640         bool persistent;
2641         bool reconnected;
2642         unsigned int timeout;
2643         char *CreateGuid;
2644 };
2645
2646 static int parse_durable_handle_context(struct ksmbd_work *work,
2647                                         struct smb2_create_req *req,
2648                                         struct lease_ctx_info *lc,
2649                                         struct durable_info *dh_info)
2650 {
2651         struct ksmbd_conn *conn = work->conn;
2652         struct create_context *context;
2653         int dh_idx, err = 0;
2654         u64 persistent_id = 0;
2655         int req_op_level;
2656         static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"};
2657
2658         req_op_level = req->RequestedOplockLevel;
2659         for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr);
2660              dh_idx++) {
2661                 context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4);
2662                 if (IS_ERR(context)) {
2663                         err = PTR_ERR(context);
2664                         goto out;
2665                 }
2666                 if (!context)
2667                         continue;
2668
2669                 switch (dh_idx) {
2670                 case DURABLE_RECONN_V2:
2671                 {
2672                         struct create_durable_reconn_v2_req *recon_v2;
2673
2674                         if (dh_info->type == DURABLE_RECONN ||
2675                             dh_info->type == DURABLE_REQ_V2) {
2676                                 err = -EINVAL;
2677                                 goto out;
2678                         }
2679
2680                         recon_v2 = (struct create_durable_reconn_v2_req *)context;
2681                         persistent_id = recon_v2->Fid.PersistentFileId;
2682                         dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2683                         if (!dh_info->fp) {
2684                                 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2685                                 err = -EBADF;
2686                                 goto out;
2687                         }
2688
2689                         if (memcmp(dh_info->fp->create_guid, recon_v2->CreateGuid,
2690                                    SMB2_CREATE_GUID_SIZE)) {
2691                                 err = -EBADF;
2692                                 ksmbd_put_durable_fd(dh_info->fp);
2693                                 goto out;
2694                         }
2695
2696                         dh_info->type = dh_idx;
2697                         dh_info->reconnected = true;
2698                         ksmbd_debug(SMB,
2699                                 "reconnect v2 Persistent-id from reconnect = %llu\n",
2700                                         persistent_id);
2701                         break;
2702                 }
2703                 case DURABLE_RECONN:
2704                 {
2705                         struct create_durable_reconn_req *recon;
2706
2707                         if (dh_info->type == DURABLE_RECONN_V2 ||
2708                             dh_info->type == DURABLE_REQ_V2) {
2709                                 err = -EINVAL;
2710                                 goto out;
2711                         }
2712
2713                         recon = (struct create_durable_reconn_req *)context;
2714                         persistent_id = recon->Data.Fid.PersistentFileId;
2715                         dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2716                         if (!dh_info->fp) {
2717                                 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2718                                 err = -EBADF;
2719                                 goto out;
2720                         }
2721
2722                         dh_info->type = dh_idx;
2723                         dh_info->reconnected = true;
2724                         ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n",
2725                                     persistent_id);
2726                         break;
2727                 }
2728                 case DURABLE_REQ_V2:
2729                 {
2730                         struct create_durable_req_v2 *durable_v2_blob;
2731
2732                         if (dh_info->type == DURABLE_RECONN ||
2733                             dh_info->type == DURABLE_RECONN_V2) {
2734                                 err = -EINVAL;
2735                                 goto out;
2736                         }
2737
2738                         durable_v2_blob =
2739                                 (struct create_durable_req_v2 *)context;
2740                         ksmbd_debug(SMB, "Request for durable v2 open\n");
2741                         dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->CreateGuid);
2742                         if (dh_info->fp) {
2743                                 if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid,
2744                                             SMB2_CLIENT_GUID_SIZE)) {
2745                                         if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) {
2746                                                 err = -ENOEXEC;
2747                                                 goto out;
2748                                         }
2749
2750                                         dh_info->fp->conn = conn;
2751                                         dh_info->reconnected = true;
2752                                         goto out;
2753                                 }
2754                         }
2755
2756                         if (((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2757                              req_op_level == SMB2_OPLOCK_LEVEL_BATCH)) {
2758                                 dh_info->CreateGuid =
2759                                         durable_v2_blob->CreateGuid;
2760                                 dh_info->persistent =
2761                                         le32_to_cpu(durable_v2_blob->Flags);
2762                                 dh_info->timeout =
2763                                         le32_to_cpu(durable_v2_blob->Timeout);
2764                                 dh_info->type = dh_idx;
2765                         }
2766                         break;
2767                 }
2768                 case DURABLE_REQ:
2769                         if (dh_info->type == DURABLE_RECONN)
2770                                 goto out;
2771                         if (dh_info->type == DURABLE_RECONN_V2 ||
2772                             dh_info->type == DURABLE_REQ_V2) {
2773                                 err = -EINVAL;
2774                                 goto out;
2775                         }
2776
2777                         if (((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2778                              req_op_level == SMB2_OPLOCK_LEVEL_BATCH)) {
2779                                 ksmbd_debug(SMB, "Request for durable open\n");
2780                                 dh_info->type = dh_idx;
2781                         }
2782                 }
2783         }
2784
2785 out:
2786         return err;
2787 }
2788
2789 /**
2790  * smb2_open() - handler for smb file open request
2791  * @work:       smb work containing request buffer
2792  *
2793  * Return:      0 on success, otherwise error
2794  */
2795 int smb2_open(struct ksmbd_work *work)
2796 {
2797         struct ksmbd_conn *conn = work->conn;
2798         struct ksmbd_session *sess = work->sess;
2799         struct ksmbd_tree_connect *tcon = work->tcon;
2800         struct smb2_create_req *req;
2801         struct smb2_create_rsp *rsp;
2802         struct path path, parent_path;
2803         struct ksmbd_share_config *share = tcon->share_conf;
2804         struct ksmbd_file *fp = NULL;
2805         struct file *filp = NULL;
2806         struct mnt_idmap *idmap = NULL;
2807         struct kstat stat;
2808         struct create_context *context;
2809         struct lease_ctx_info *lc = NULL;
2810         struct create_ea_buf_req *ea_buf = NULL;
2811         struct oplock_info *opinfo;
2812         struct durable_info dh_info = {0};
2813         __le32 *next_ptr = NULL;
2814         int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2815         int rc = 0;
2816         int contxt_cnt = 0, query_disk_id = 0;
2817         int maximal_access_ctxt = 0, posix_ctxt = 0;
2818         int s_type = 0;
2819         int next_off = 0;
2820         char *name = NULL;
2821         char *stream_name = NULL;
2822         bool file_present = false, created = false, already_permitted = false;
2823         int share_ret, need_truncate = 0;
2824         u64 time;
2825         umode_t posix_mode = 0;
2826         __le32 daccess, maximal_access = 0;
2827         int iov_len = 0;
2828
2829         WORK_BUFFERS(work, req, rsp);
2830
2831         if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2832             (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2833                 ksmbd_debug(SMB, "invalid flag in chained command\n");
2834                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2835                 smb2_set_err_rsp(work);
2836                 return -EINVAL;
2837         }
2838
2839         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2840                 ksmbd_debug(SMB, "IPC pipe create request\n");
2841                 return create_smb2_pipe(work);
2842         }
2843
2844         if (req->NameLength) {
2845                 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2846                     *(char *)req->Buffer == '\\') {
2847                         pr_err("not allow directory name included leading slash\n");
2848                         rc = -EINVAL;
2849                         goto err_out2;
2850                 }
2851
2852                 name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset),
2853                                      le16_to_cpu(req->NameLength),
2854                                      work->conn->local_nls);
2855                 if (IS_ERR(name)) {
2856                         rc = PTR_ERR(name);
2857                         if (rc != -ENOMEM)
2858                                 rc = -ENOENT;
2859                         name = NULL;
2860                         goto err_out2;
2861                 }
2862
2863                 ksmbd_debug(SMB, "converted name = %s\n", name);
2864                 if (strchr(name, ':')) {
2865                         if (!test_share_config_flag(work->tcon->share_conf,
2866                                                     KSMBD_SHARE_FLAG_STREAMS)) {
2867                                 rc = -EBADF;
2868                                 goto err_out2;
2869                         }
2870                         rc = parse_stream_name(name, &stream_name, &s_type);
2871                         if (rc < 0)
2872                                 goto err_out2;
2873                 }
2874
2875                 rc = ksmbd_validate_filename(name);
2876                 if (rc < 0)
2877                         goto err_out2;
2878
2879                 if (ksmbd_share_veto_filename(share, name)) {
2880                         rc = -ENOENT;
2881                         ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2882                                     name);
2883                         goto err_out2;
2884                 }
2885         } else {
2886                 name = kstrdup("", GFP_KERNEL);
2887                 if (!name) {
2888                         rc = -ENOMEM;
2889                         goto err_out2;
2890                 }
2891         }
2892
2893         req_op_level = req->RequestedOplockLevel;
2894
2895         if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE &&
2896             req->CreateContextsOffset) {
2897                 lc = parse_lease_state(req);
2898                 rc = parse_durable_handle_context(work, req, lc, &dh_info);
2899                 if (rc) {
2900                         ksmbd_debug(SMB, "error parsing durable handle context\n");
2901                         goto err_out2;
2902                 }
2903
2904                 if (dh_info.reconnected == true) {
2905                         rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, name);
2906                         if (rc) {
2907                                 ksmbd_put_durable_fd(dh_info.fp);
2908                                 goto err_out2;
2909                         }
2910
2911                         rc = ksmbd_reopen_durable_fd(work, dh_info.fp);
2912                         if (rc) {
2913                                 ksmbd_put_durable_fd(dh_info.fp);
2914                                 goto err_out2;
2915                         }
2916
2917                         if (ksmbd_override_fsids(work)) {
2918                                 rc = -ENOMEM;
2919                                 ksmbd_put_durable_fd(dh_info.fp);
2920                                 goto err_out2;
2921                         }
2922
2923                         fp = dh_info.fp;
2924                         file_info = FILE_OPENED;
2925
2926                         rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat);
2927                         if (rc)
2928                                 goto err_out2;
2929
2930                         ksmbd_put_durable_fd(fp);
2931                         goto reconnected_fp;
2932                 }
2933         } else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2934                 lc = parse_lease_state(req);
2935
2936         if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2937                 pr_err("Invalid impersonationlevel : 0x%x\n",
2938                        le32_to_cpu(req->ImpersonationLevel));
2939                 rc = -EIO;
2940                 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2941                 goto err_out2;
2942         }
2943
2944         if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2945                 pr_err("Invalid create options : 0x%x\n",
2946                        le32_to_cpu(req->CreateOptions));
2947                 rc = -EINVAL;
2948                 goto err_out2;
2949         } else {
2950                 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2951                     req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2952                         req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2953
2954                 if (req->CreateOptions &
2955                     (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2956                      FILE_RESERVE_OPFILTER_LE)) {
2957                         rc = -EOPNOTSUPP;
2958                         goto err_out2;
2959                 }
2960
2961                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2962                         if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2963                                 rc = -EINVAL;
2964                                 goto err_out2;
2965                         } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2966                                 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2967                         }
2968                 }
2969         }
2970
2971         if (le32_to_cpu(req->CreateDisposition) >
2972             le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2973                 pr_err("Invalid create disposition : 0x%x\n",
2974                        le32_to_cpu(req->CreateDisposition));
2975                 rc = -EINVAL;
2976                 goto err_out2;
2977         }
2978
2979         if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2980                 pr_err("Invalid desired access : 0x%x\n",
2981                        le32_to_cpu(req->DesiredAccess));
2982                 rc = -EACCES;
2983                 goto err_out2;
2984         }
2985
2986         if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2987                 pr_err("Invalid file attribute : 0x%x\n",
2988                        le32_to_cpu(req->FileAttributes));
2989                 rc = -EINVAL;
2990                 goto err_out2;
2991         }
2992
2993         if (req->CreateContextsOffset) {
2994                 /* Parse non-durable handle create contexts */
2995                 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
2996                 if (IS_ERR(context)) {
2997                         rc = PTR_ERR(context);
2998                         goto err_out2;
2999                 } else if (context) {
3000                         ea_buf = (struct create_ea_buf_req *)context;
3001                         if (le16_to_cpu(context->DataOffset) +
3002                             le32_to_cpu(context->DataLength) <
3003                             sizeof(struct create_ea_buf_req)) {
3004                                 rc = -EINVAL;
3005                                 goto err_out2;
3006                         }
3007                         if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
3008                                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3009                                 rc = -EACCES;
3010                                 goto err_out2;
3011                         }
3012                 }
3013
3014                 context = smb2_find_context_vals(req,
3015                                                  SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
3016                 if (IS_ERR(context)) {
3017                         rc = PTR_ERR(context);
3018                         goto err_out2;
3019                 } else if (context) {
3020                         ksmbd_debug(SMB,
3021                                     "get query maximal access context\n");
3022                         maximal_access_ctxt = 1;
3023                 }
3024
3025                 context = smb2_find_context_vals(req,
3026                                                  SMB2_CREATE_TIMEWARP_REQUEST, 4);
3027                 if (IS_ERR(context)) {
3028                         rc = PTR_ERR(context);
3029                         goto err_out2;
3030                 } else if (context) {
3031                         ksmbd_debug(SMB, "get timewarp context\n");
3032                         rc = -EBADF;
3033                         goto err_out2;
3034                 }
3035
3036                 if (tcon->posix_extensions) {
3037                         context = smb2_find_context_vals(req,
3038                                                          SMB2_CREATE_TAG_POSIX, 16);
3039                         if (IS_ERR(context)) {
3040                                 rc = PTR_ERR(context);
3041                                 goto err_out2;
3042                         } else if (context) {
3043                                 struct create_posix *posix =
3044                                         (struct create_posix *)context;
3045                                 if (le16_to_cpu(context->DataOffset) +
3046                                     le32_to_cpu(context->DataLength) <
3047                                     sizeof(struct create_posix) - 4) {
3048                                         rc = -EINVAL;
3049                                         goto err_out2;
3050                                 }
3051                                 ksmbd_debug(SMB, "get posix context\n");
3052
3053                                 posix_mode = le32_to_cpu(posix->Mode);
3054                                 posix_ctxt = 1;
3055                         }
3056                 }
3057         }
3058
3059         if (ksmbd_override_fsids(work)) {
3060                 rc = -ENOMEM;
3061                 goto err_out2;
3062         }
3063
3064         rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
3065                                         &parent_path, &path, 1);
3066         if (!rc) {
3067                 file_present = true;
3068
3069                 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
3070                         /*
3071                          * If file exists with under flags, return access
3072                          * denied error.
3073                          */
3074                         if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
3075                             req->CreateDisposition == FILE_OPEN_IF_LE) {
3076                                 rc = -EACCES;
3077                                 goto err_out;
3078                         }
3079
3080                         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3081                                 ksmbd_debug(SMB,
3082                                             "User does not have write permission\n");
3083                                 rc = -EACCES;
3084                                 goto err_out;
3085                         }
3086                 } else if (d_is_symlink(path.dentry)) {
3087                         rc = -EACCES;
3088                         goto err_out;
3089                 }
3090
3091                 file_present = true;
3092                 idmap = mnt_idmap(path.mnt);
3093         } else {
3094                 if (rc != -ENOENT)
3095                         goto err_out;
3096                 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
3097                             name, rc);
3098                 rc = 0;
3099         }
3100
3101         if (stream_name) {
3102                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
3103                         if (s_type == DATA_STREAM) {
3104                                 rc = -EIO;
3105                                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3106                         }
3107                 } else {
3108                         if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
3109                             s_type == DATA_STREAM) {
3110                                 rc = -EIO;
3111                                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3112                         }
3113                 }
3114
3115                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
3116                     req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
3117                         rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3118                         rc = -EIO;
3119                 }
3120
3121                 if (rc < 0)
3122                         goto err_out;
3123         }
3124
3125         if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
3126             S_ISDIR(d_inode(path.dentry)->i_mode) &&
3127             !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3128                 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
3129                             name, req->CreateOptions);
3130                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3131                 rc = -EIO;
3132                 goto err_out;
3133         }
3134
3135         if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
3136             !(req->CreateDisposition == FILE_CREATE_LE) &&
3137             !S_ISDIR(d_inode(path.dentry)->i_mode)) {
3138                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3139                 rc = -EIO;
3140                 goto err_out;
3141         }
3142
3143         if (!stream_name && file_present &&
3144             req->CreateDisposition == FILE_CREATE_LE) {
3145                 rc = -EEXIST;
3146                 goto err_out;
3147         }
3148
3149         daccess = smb_map_generic_desired_access(req->DesiredAccess);
3150
3151         if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3152                 rc = smb_check_perm_dacl(conn, &path, &daccess,
3153                                          sess->user->uid);
3154                 if (rc)
3155                         goto err_out;
3156         }
3157
3158         if (daccess & FILE_MAXIMAL_ACCESS_LE) {
3159                 if (!file_present) {
3160                         daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
3161                 } else {
3162                         ksmbd_vfs_query_maximal_access(idmap,
3163                                                             path.dentry,
3164                                                             &daccess);
3165                         already_permitted = true;
3166                 }
3167                 maximal_access = daccess;
3168         }
3169
3170         open_flags = smb2_create_open_flags(file_present, daccess,
3171                                             req->CreateDisposition,
3172                                             &may_flags);
3173
3174         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3175                 if (open_flags & (O_CREAT | O_TRUNC)) {
3176                         ksmbd_debug(SMB,
3177                                     "User does not have write permission\n");
3178                         rc = -EACCES;
3179                         goto err_out;
3180                 }
3181         }
3182
3183         /*create file if not present */
3184         if (!file_present) {
3185                 rc = smb2_creat(work, &parent_path, &path, name, open_flags,
3186                                 posix_mode,
3187                                 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
3188                 if (rc) {
3189                         if (rc == -ENOENT) {
3190                                 rc = -EIO;
3191                                 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
3192                         }
3193                         goto err_out;
3194                 }
3195
3196                 created = true;
3197                 idmap = mnt_idmap(path.mnt);
3198                 if (ea_buf) {
3199                         if (le32_to_cpu(ea_buf->ccontext.DataLength) <
3200                             sizeof(struct smb2_ea_info)) {
3201                                 rc = -EINVAL;
3202                                 goto err_out;
3203                         }
3204
3205                         rc = smb2_set_ea(&ea_buf->ea,
3206                                          le32_to_cpu(ea_buf->ccontext.DataLength),
3207                                          &path, false);
3208                         if (rc == -EOPNOTSUPP)
3209                                 rc = 0;
3210                         else if (rc)
3211                                 goto err_out;
3212                 }
3213         } else if (!already_permitted) {
3214                 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3215                  * because execute(search) permission on a parent directory,
3216                  * is already granted.
3217                  */
3218                 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3219                         rc = inode_permission(idmap,
3220                                               d_inode(path.dentry),
3221                                               may_flags);
3222                         if (rc)
3223                                 goto err_out;
3224
3225                         if ((daccess & FILE_DELETE_LE) ||
3226                             (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3227                                 rc = inode_permission(idmap,
3228                                                       d_inode(path.dentry->d_parent),
3229                                                       MAY_EXEC | MAY_WRITE);
3230                                 if (rc)
3231                                         goto err_out;
3232                         }
3233                 }
3234         }
3235
3236         rc = ksmbd_query_inode_status(path.dentry->d_parent);
3237         if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3238                 rc = -EBUSY;
3239                 goto err_out;
3240         }
3241
3242         rc = 0;
3243         filp = dentry_open(&path, open_flags, current_cred());
3244         if (IS_ERR(filp)) {
3245                 rc = PTR_ERR(filp);
3246                 pr_err("dentry open for dir failed, rc %d\n", rc);
3247                 goto err_out;
3248         }
3249
3250         if (file_present) {
3251                 if (!(open_flags & O_TRUNC))
3252                         file_info = FILE_OPENED;
3253                 else
3254                         file_info = FILE_OVERWRITTEN;
3255
3256                 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3257                     FILE_SUPERSEDE_LE)
3258                         file_info = FILE_SUPERSEDED;
3259         } else if (open_flags & O_CREAT) {
3260                 file_info = FILE_CREATED;
3261         }
3262
3263         ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3264
3265         /* Obtain Volatile-ID */
3266         fp = ksmbd_open_fd(work, filp);
3267         if (IS_ERR(fp)) {
3268                 fput(filp);
3269                 rc = PTR_ERR(fp);
3270                 fp = NULL;
3271                 goto err_out;
3272         }
3273
3274         /* Get Persistent-ID */
3275         ksmbd_open_durable_fd(fp);
3276         if (!has_file_id(fp->persistent_id)) {
3277                 rc = -ENOMEM;
3278                 goto err_out;
3279         }
3280
3281         fp->cdoption = req->CreateDisposition;
3282         fp->daccess = daccess;
3283         fp->saccess = req->ShareAccess;
3284         fp->coption = req->CreateOptions;
3285
3286         /* Set default windows and posix acls if creating new file */
3287         if (created) {
3288                 int posix_acl_rc;
3289                 struct inode *inode = d_inode(path.dentry);
3290
3291                 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3292                                                            &path,
3293                                                            d_inode(path.dentry->d_parent));
3294                 if (posix_acl_rc)
3295                         ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3296
3297                 if (test_share_config_flag(work->tcon->share_conf,
3298                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
3299                         rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3300                                               sess->user->gid);
3301                 }
3302
3303                 if (rc) {
3304                         rc = smb2_create_sd_buffer(work, req, &path);
3305                         if (rc) {
3306                                 if (posix_acl_rc)
3307                                         ksmbd_vfs_set_init_posix_acl(idmap,
3308                                                                      &path);
3309
3310                                 if (test_share_config_flag(work->tcon->share_conf,
3311                                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
3312                                         struct smb_fattr fattr;
3313                                         struct smb_ntsd *pntsd;
3314                                         int pntsd_size, ace_num = 0;
3315
3316                                         ksmbd_acls_fattr(&fattr, idmap, inode);
3317                                         if (fattr.cf_acls)
3318                                                 ace_num = fattr.cf_acls->a_count;
3319                                         if (fattr.cf_dacls)
3320                                                 ace_num += fattr.cf_dacls->a_count;
3321
3322                                         pntsd = kmalloc(sizeof(struct smb_ntsd) +
3323                                                         sizeof(struct smb_sid) * 3 +
3324                                                         sizeof(struct smb_acl) +
3325                                                         sizeof(struct smb_ace) * ace_num * 2,
3326                                                         GFP_KERNEL);
3327                                         if (!pntsd) {
3328                                                 posix_acl_release(fattr.cf_acls);
3329                                                 posix_acl_release(fattr.cf_dacls);
3330                                                 goto err_out;
3331                                         }
3332
3333                                         rc = build_sec_desc(idmap,
3334                                                             pntsd, NULL, 0,
3335                                                             OWNER_SECINFO |
3336                                                             GROUP_SECINFO |
3337                                                             DACL_SECINFO,
3338                                                             &pntsd_size, &fattr);
3339                                         posix_acl_release(fattr.cf_acls);
3340                                         posix_acl_release(fattr.cf_dacls);
3341                                         if (rc) {
3342                                                 kfree(pntsd);
3343                                                 goto err_out;
3344                                         }
3345
3346                                         rc = ksmbd_vfs_set_sd_xattr(conn,
3347                                                                     idmap,
3348                                                                     &path,
3349                                                                     pntsd,
3350                                                                     pntsd_size,
3351                                                                     false);
3352                                         kfree(pntsd);
3353                                         if (rc)
3354                                                 pr_err("failed to store ntacl in xattr : %d\n",
3355                                                        rc);
3356                                 }
3357                         }
3358                 }
3359                 rc = 0;
3360         }
3361
3362         if (stream_name) {
3363                 rc = smb2_set_stream_name_xattr(&path,
3364                                                 fp,
3365                                                 stream_name,
3366                                                 s_type);
3367                 if (rc)
3368                         goto err_out;
3369                 file_info = FILE_CREATED;
3370         }
3371
3372         fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3373                         FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3374
3375         /* fp should be searchable through ksmbd_inode.m_fp_list
3376          * after daccess, saccess, attrib_only, and stream are
3377          * initialized.
3378          */
3379         down_write(&fp->f_ci->m_lock);
3380         list_add(&fp->node, &fp->f_ci->m_fp_list);
3381         up_write(&fp->f_ci->m_lock);
3382
3383         /* Check delete pending among previous fp before oplock break */
3384         if (ksmbd_inode_pending_delete(fp)) {
3385                 rc = -EBUSY;
3386                 goto err_out;
3387         }
3388
3389         if (file_present || created)
3390                 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3391
3392         if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3393             !fp->attrib_only && !stream_name) {
3394                 smb_break_all_oplock(work, fp);
3395                 need_truncate = 1;
3396         }
3397
3398         share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3399         if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3400             (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3401              !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3402                 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3403                         rc = share_ret;
3404                         goto err_out1;
3405                 }
3406         } else {
3407                 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3408                         if (S_ISDIR(file_inode(filp)->i_mode)) {
3409                                 lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE;
3410                                 lc->is_dir = true;
3411                         }
3412
3413                         /*
3414                          * Compare parent lease using parent key. If there is no
3415                          * a lease that has same parent key, Send lease break
3416                          * notification.
3417                          */
3418                         smb_send_parent_lease_break_noti(fp, lc);
3419
3420                         req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3421                         ksmbd_debug(SMB,
3422                                     "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3423                                     name, req_op_level, lc->req_state);
3424                         rc = find_same_lease_key(sess, fp->f_ci, lc);
3425                         if (rc)
3426                                 goto err_out1;
3427                 } else if (open_flags == O_RDONLY &&
3428                            (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3429                             req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3430                         req_op_level = SMB2_OPLOCK_LEVEL_II;
3431
3432                 rc = smb_grant_oplock(work, req_op_level,
3433                                       fp->persistent_id, fp,
3434                                       le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3435                                       lc, share_ret);
3436                 if (rc < 0)
3437                         goto err_out1;
3438         }
3439
3440         if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3441                 ksmbd_fd_set_delete_on_close(fp, file_info);
3442
3443         if (need_truncate) {
3444                 rc = smb2_create_truncate(&fp->filp->f_path);
3445                 if (rc)
3446                         goto err_out1;
3447         }
3448
3449         if (req->CreateContextsOffset) {
3450                 struct create_alloc_size_req *az_req;
3451
3452                 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3453                                         SMB2_CREATE_ALLOCATION_SIZE, 4);
3454                 if (IS_ERR(az_req)) {
3455                         rc = PTR_ERR(az_req);
3456                         goto err_out1;
3457                 } else if (az_req) {
3458                         loff_t alloc_size;
3459                         int err;
3460
3461                         if (le16_to_cpu(az_req->ccontext.DataOffset) +
3462                             le32_to_cpu(az_req->ccontext.DataLength) <
3463                             sizeof(struct create_alloc_size_req)) {
3464                                 rc = -EINVAL;
3465                                 goto err_out1;
3466                         }
3467                         alloc_size = le64_to_cpu(az_req->AllocationSize);
3468                         ksmbd_debug(SMB,
3469                                     "request smb2 create allocate size : %llu\n",
3470                                     alloc_size);
3471                         smb_break_all_levII_oplock(work, fp, 1);
3472                         err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3473                                             alloc_size);
3474                         if (err < 0)
3475                                 ksmbd_debug(SMB,
3476                                             "vfs_fallocate is failed : %d\n",
3477                                             err);
3478                 }
3479
3480                 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3481                 if (IS_ERR(context)) {
3482                         rc = PTR_ERR(context);
3483                         goto err_out1;
3484                 } else if (context) {
3485                         ksmbd_debug(SMB, "get query on disk id context\n");
3486                         query_disk_id = 1;
3487                 }
3488         }
3489
3490         rc = ksmbd_vfs_getattr(&path, &stat);
3491         if (rc)
3492                 goto err_out1;
3493
3494         if (stat.result_mask & STATX_BTIME)
3495                 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3496         else
3497                 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3498         if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3499                 fp->f_ci->m_fattr =
3500                         cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3501
3502         if (!created)
3503                 smb2_update_xattrs(tcon, &path, fp);
3504         else
3505                 smb2_new_xattrs(tcon, &path, fp);
3506
3507         memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3508
3509         if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) {
3510                 if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent &&
3511                     test_share_config_flag(work->tcon->share_conf,
3512                                            KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
3513                         fp->is_persistent = true;
3514                 else
3515                         fp->is_durable = true;
3516
3517                 if (dh_info.type == DURABLE_REQ_V2) {
3518                         memcpy(fp->create_guid, dh_info.CreateGuid,
3519                                         SMB2_CREATE_GUID_SIZE);
3520                         if (dh_info.timeout)
3521                                 fp->durable_timeout = min(dh_info.timeout,
3522                                                 300000);
3523                         else
3524                                 fp->durable_timeout = 60;
3525                 }
3526         }
3527
3528 reconnected_fp:
3529         rsp->StructureSize = cpu_to_le16(89);
3530         rcu_read_lock();
3531         opinfo = rcu_dereference(fp->f_opinfo);
3532         rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3533         rcu_read_unlock();
3534         rsp->Flags = 0;
3535         rsp->CreateAction = cpu_to_le32(file_info);
3536         rsp->CreationTime = cpu_to_le64(fp->create_time);
3537         time = ksmbd_UnixTimeToNT(stat.atime);
3538         rsp->LastAccessTime = cpu_to_le64(time);
3539         time = ksmbd_UnixTimeToNT(stat.mtime);
3540         rsp->LastWriteTime = cpu_to_le64(time);
3541         time = ksmbd_UnixTimeToNT(stat.ctime);
3542         rsp->ChangeTime = cpu_to_le64(time);
3543         rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3544                 cpu_to_le64(stat.blocks << 9);
3545         rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3546         rsp->FileAttributes = fp->f_ci->m_fattr;
3547
3548         rsp->Reserved2 = 0;
3549
3550         rsp->PersistentFileId = fp->persistent_id;
3551         rsp->VolatileFileId = fp->volatile_id;
3552
3553         rsp->CreateContextsOffset = 0;
3554         rsp->CreateContextsLength = 0;
3555         iov_len = offsetof(struct smb2_create_rsp, Buffer);
3556
3557         /* If lease is request send lease context response */
3558         if (opinfo && opinfo->is_lease) {
3559                 struct create_context *lease_ccontext;
3560
3561                 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3562                             name, opinfo->o_lease->state);
3563                 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3564
3565                 lease_ccontext = (struct create_context *)rsp->Buffer;
3566                 contxt_cnt++;
3567                 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3568                 le32_add_cpu(&rsp->CreateContextsLength,
3569                              conn->vals->create_lease_size);
3570                 iov_len += conn->vals->create_lease_size;
3571                 next_ptr = &lease_ccontext->Next;
3572                 next_off = conn->vals->create_lease_size;
3573         }
3574
3575         if (maximal_access_ctxt) {
3576                 struct create_context *mxac_ccontext;
3577
3578                 if (maximal_access == 0)
3579                         ksmbd_vfs_query_maximal_access(idmap,
3580                                                        path.dentry,
3581                                                        &maximal_access);
3582                 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3583                                 le32_to_cpu(rsp->CreateContextsLength));
3584                 contxt_cnt++;
3585                 create_mxac_rsp_buf(rsp->Buffer +
3586                                 le32_to_cpu(rsp->CreateContextsLength),
3587                                 le32_to_cpu(maximal_access));
3588                 le32_add_cpu(&rsp->CreateContextsLength,
3589                              conn->vals->create_mxac_size);
3590                 iov_len += conn->vals->create_mxac_size;
3591                 if (next_ptr)
3592                         *next_ptr = cpu_to_le32(next_off);
3593                 next_ptr = &mxac_ccontext->Next;
3594                 next_off = conn->vals->create_mxac_size;
3595         }
3596
3597         if (query_disk_id) {
3598                 struct create_context *disk_id_ccontext;
3599
3600                 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3601                                 le32_to_cpu(rsp->CreateContextsLength));
3602                 contxt_cnt++;
3603                 create_disk_id_rsp_buf(rsp->Buffer +
3604                                 le32_to_cpu(rsp->CreateContextsLength),
3605                                 stat.ino, tcon->id);
3606                 le32_add_cpu(&rsp->CreateContextsLength,
3607                              conn->vals->create_disk_id_size);
3608                 iov_len += conn->vals->create_disk_id_size;
3609                 if (next_ptr)
3610                         *next_ptr = cpu_to_le32(next_off);
3611                 next_ptr = &disk_id_ccontext->Next;
3612                 next_off = conn->vals->create_disk_id_size;
3613         }
3614
3615         if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) {
3616                 struct create_context *durable_ccontext;
3617
3618                 durable_ccontext = (struct create_context *)(rsp->Buffer +
3619                                 le32_to_cpu(rsp->CreateContextsLength));
3620                 contxt_cnt++;
3621                 if (dh_info.type == DURABLE_REQ) {
3622                         create_durable_rsp_buf(rsp->Buffer +
3623                                         le32_to_cpu(rsp->CreateContextsLength));
3624                         le32_add_cpu(&rsp->CreateContextsLength,
3625                                         conn->vals->create_durable_size);
3626                         iov_len += conn->vals->create_durable_size;
3627                 } else {
3628                         create_durable_v2_rsp_buf(rsp->Buffer +
3629                                         le32_to_cpu(rsp->CreateContextsLength),
3630                                         fp);
3631                         le32_add_cpu(&rsp->CreateContextsLength,
3632                                         conn->vals->create_durable_v2_size);
3633                         iov_len += conn->vals->create_durable_v2_size;
3634                 }
3635
3636                 if (next_ptr)
3637                         *next_ptr = cpu_to_le32(next_off);
3638                 next_ptr = &durable_ccontext->Next;
3639                 next_off = conn->vals->create_durable_size;
3640         }
3641
3642         if (posix_ctxt) {
3643                 contxt_cnt++;
3644                 create_posix_rsp_buf(rsp->Buffer +
3645                                 le32_to_cpu(rsp->CreateContextsLength),
3646                                 fp);
3647                 le32_add_cpu(&rsp->CreateContextsLength,
3648                              conn->vals->create_posix_size);
3649                 iov_len += conn->vals->create_posix_size;
3650                 if (next_ptr)
3651                         *next_ptr = cpu_to_le32(next_off);
3652         }
3653
3654         if (contxt_cnt > 0) {
3655                 rsp->CreateContextsOffset =
3656                         cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3657         }
3658
3659 err_out:
3660         if (rc && (file_present || created))
3661                 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3662
3663 err_out1:
3664         ksmbd_revert_fsids(work);
3665
3666 err_out2:
3667         if (!rc) {
3668                 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3669                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3670         }
3671         if (rc) {
3672                 if (rc == -EINVAL)
3673                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3674                 else if (rc == -EOPNOTSUPP)
3675                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3676                 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3677                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
3678                 else if (rc == -ENOENT)
3679                         rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3680                 else if (rc == -EPERM)
3681                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3682                 else if (rc == -EBUSY)
3683                         rsp->hdr.Status = STATUS_DELETE_PENDING;
3684                 else if (rc == -EBADF)
3685                         rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3686                 else if (rc == -ENOEXEC)
3687                         rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3688                 else if (rc == -ENXIO)
3689                         rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3690                 else if (rc == -EEXIST)
3691                         rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3692                 else if (rc == -EMFILE)
3693                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3694                 if (!rsp->hdr.Status)
3695                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3696
3697                 if (fp)
3698                         ksmbd_fd_put(work, fp);
3699                 smb2_set_err_rsp(work);
3700                 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3701         }
3702
3703         kfree(name);
3704         kfree(lc);
3705
3706         return 0;
3707 }
3708
3709 static int readdir_info_level_struct_sz(int info_level)
3710 {
3711         switch (info_level) {
3712         case FILE_FULL_DIRECTORY_INFORMATION:
3713                 return sizeof(struct file_full_directory_info);
3714         case FILE_BOTH_DIRECTORY_INFORMATION:
3715                 return sizeof(struct file_both_directory_info);
3716         case FILE_DIRECTORY_INFORMATION:
3717                 return sizeof(struct file_directory_info);
3718         case FILE_NAMES_INFORMATION:
3719                 return sizeof(struct file_names_info);
3720         case FILEID_FULL_DIRECTORY_INFORMATION:
3721                 return sizeof(struct file_id_full_dir_info);
3722         case FILEID_BOTH_DIRECTORY_INFORMATION:
3723                 return sizeof(struct file_id_both_directory_info);
3724         case SMB_FIND_FILE_POSIX_INFO:
3725                 return sizeof(struct smb2_posix_info);
3726         default:
3727                 return -EOPNOTSUPP;
3728         }
3729 }
3730
3731 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3732 {
3733         switch (info_level) {
3734         case FILE_FULL_DIRECTORY_INFORMATION:
3735         {
3736                 struct file_full_directory_info *ffdinfo;
3737
3738                 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3739                 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3740                 d_info->name = ffdinfo->FileName;
3741                 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3742                 return 0;
3743         }
3744         case FILE_BOTH_DIRECTORY_INFORMATION:
3745         {
3746                 struct file_both_directory_info *fbdinfo;
3747
3748                 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3749                 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3750                 d_info->name = fbdinfo->FileName;
3751                 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3752                 return 0;
3753         }
3754         case FILE_DIRECTORY_INFORMATION:
3755         {
3756                 struct file_directory_info *fdinfo;
3757
3758                 fdinfo = (struct file_directory_info *)d_info->rptr;
3759                 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3760                 d_info->name = fdinfo->FileName;
3761                 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3762                 return 0;
3763         }
3764         case FILE_NAMES_INFORMATION:
3765         {
3766                 struct file_names_info *fninfo;
3767
3768                 fninfo = (struct file_names_info *)d_info->rptr;
3769                 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3770                 d_info->name = fninfo->FileName;
3771                 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3772                 return 0;
3773         }
3774         case FILEID_FULL_DIRECTORY_INFORMATION:
3775         {
3776                 struct file_id_full_dir_info *dinfo;
3777
3778                 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3779                 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3780                 d_info->name = dinfo->FileName;
3781                 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3782                 return 0;
3783         }
3784         case FILEID_BOTH_DIRECTORY_INFORMATION:
3785         {
3786                 struct file_id_both_directory_info *fibdinfo;
3787
3788                 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3789                 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3790                 d_info->name = fibdinfo->FileName;
3791                 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3792                 return 0;
3793         }
3794         case SMB_FIND_FILE_POSIX_INFO:
3795         {
3796                 struct smb2_posix_info *posix_info;
3797
3798                 posix_info = (struct smb2_posix_info *)d_info->rptr;
3799                 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3800                 d_info->name = posix_info->name;
3801                 d_info->name_len = le32_to_cpu(posix_info->name_len);
3802                 return 0;
3803         }
3804         default:
3805                 return -EINVAL;
3806         }
3807 }
3808
3809 /**
3810  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3811  * buffer
3812  * @conn:       connection instance
3813  * @info_level: smb information level
3814  * @d_info:     structure included variables for query dir
3815  * @ksmbd_kstat:        ksmbd wrapper of dirent stat information
3816  *
3817  * if directory has many entries, find first can't read it fully.
3818  * find next might be called multiple times to read remaining dir entries
3819  *
3820  * Return:      0 on success, otherwise error
3821  */
3822 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3823                                        struct ksmbd_dir_info *d_info,
3824                                        struct ksmbd_kstat *ksmbd_kstat)
3825 {
3826         int next_entry_offset = 0;
3827         char *conv_name;
3828         int conv_len;
3829         void *kstat;
3830         int struct_sz, rc = 0;
3831
3832         conv_name = ksmbd_convert_dir_info_name(d_info,
3833                                                 conn->local_nls,
3834                                                 &conv_len);
3835         if (!conv_name)
3836                 return -ENOMEM;
3837
3838         /* Somehow the name has only terminating NULL bytes */
3839         if (conv_len < 0) {
3840                 rc = -EINVAL;
3841                 goto free_conv_name;
3842         }
3843
3844         struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3845         next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3846         d_info->last_entry_off_align = next_entry_offset - struct_sz;
3847
3848         if (next_entry_offset > d_info->out_buf_len) {
3849                 d_info->out_buf_len = 0;
3850                 rc = -ENOSPC;
3851                 goto free_conv_name;
3852         }
3853
3854         kstat = d_info->wptr;
3855         if (info_level != FILE_NAMES_INFORMATION)
3856                 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3857
3858         switch (info_level) {
3859         case FILE_FULL_DIRECTORY_INFORMATION:
3860         {
3861                 struct file_full_directory_info *ffdinfo;
3862
3863                 ffdinfo = (struct file_full_directory_info *)kstat;
3864                 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3865                 ffdinfo->EaSize =
3866                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3867                 if (ffdinfo->EaSize)
3868                         ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3869                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3870                         ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3871                 memcpy(ffdinfo->FileName, conv_name, conv_len);
3872                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3873                 break;
3874         }
3875         case FILE_BOTH_DIRECTORY_INFORMATION:
3876         {
3877                 struct file_both_directory_info *fbdinfo;
3878
3879                 fbdinfo = (struct file_both_directory_info *)kstat;
3880                 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3881                 fbdinfo->EaSize =
3882                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3883                 if (fbdinfo->EaSize)
3884                         fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3885                 fbdinfo->ShortNameLength = 0;
3886                 fbdinfo->Reserved = 0;
3887                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3888                         fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3889                 memcpy(fbdinfo->FileName, conv_name, conv_len);
3890                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3891                 break;
3892         }
3893         case FILE_DIRECTORY_INFORMATION:
3894         {
3895                 struct file_directory_info *fdinfo;
3896
3897                 fdinfo = (struct file_directory_info *)kstat;
3898                 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3899                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3900                         fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3901                 memcpy(fdinfo->FileName, conv_name, conv_len);
3902                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3903                 break;
3904         }
3905         case FILE_NAMES_INFORMATION:
3906         {
3907                 struct file_names_info *fninfo;
3908
3909                 fninfo = (struct file_names_info *)kstat;
3910                 fninfo->FileNameLength = cpu_to_le32(conv_len);
3911                 memcpy(fninfo->FileName, conv_name, conv_len);
3912                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3913                 break;
3914         }
3915         case FILEID_FULL_DIRECTORY_INFORMATION:
3916         {
3917                 struct file_id_full_dir_info *dinfo;
3918
3919                 dinfo = (struct file_id_full_dir_info *)kstat;
3920                 dinfo->FileNameLength = cpu_to_le32(conv_len);
3921                 dinfo->EaSize =
3922                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3923                 if (dinfo->EaSize)
3924                         dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3925                 dinfo->Reserved = 0;
3926                 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3927                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3928                         dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3929                 memcpy(dinfo->FileName, conv_name, conv_len);
3930                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3931                 break;
3932         }
3933         case FILEID_BOTH_DIRECTORY_INFORMATION:
3934         {
3935                 struct file_id_both_directory_info *fibdinfo;
3936
3937                 fibdinfo = (struct file_id_both_directory_info *)kstat;
3938                 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3939                 fibdinfo->EaSize =
3940                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3941                 if (fibdinfo->EaSize)
3942                         fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3943                 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3944                 fibdinfo->ShortNameLength = 0;
3945                 fibdinfo->Reserved = 0;
3946                 fibdinfo->Reserved2 = cpu_to_le16(0);
3947                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3948                         fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3949                 memcpy(fibdinfo->FileName, conv_name, conv_len);
3950                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3951                 break;
3952         }
3953         case SMB_FIND_FILE_POSIX_INFO:
3954         {
3955                 struct smb2_posix_info *posix_info;
3956                 u64 time;
3957
3958                 posix_info = (struct smb2_posix_info *)kstat;
3959                 posix_info->Ignored = 0;
3960                 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3961                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3962                 posix_info->ChangeTime = cpu_to_le64(time);
3963                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3964                 posix_info->LastAccessTime = cpu_to_le64(time);
3965                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3966                 posix_info->LastWriteTime = cpu_to_le64(time);
3967                 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3968                 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3969                 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3970                 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3971                 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3972                 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3973                 posix_info->DosAttributes =
3974                         S_ISDIR(ksmbd_kstat->kstat->mode) ?
3975                                 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3976                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3977                         posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3978                 /*
3979                  * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3980                  * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3981                  *                sub_auth(4 * 1(num_subauth)) + RID(4).
3982                  */
3983                 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3984                           SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3985                 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3986                           SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3987                 memcpy(posix_info->name, conv_name, conv_len);
3988                 posix_info->name_len = cpu_to_le32(conv_len);
3989                 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3990                 break;
3991         }
3992
3993         } /* switch (info_level) */
3994
3995         d_info->last_entry_offset = d_info->data_count;
3996         d_info->data_count += next_entry_offset;
3997         d_info->out_buf_len -= next_entry_offset;
3998         d_info->wptr += next_entry_offset;
3999
4000         ksmbd_debug(SMB,
4001                     "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
4002                     info_level, d_info->out_buf_len,
4003                     next_entry_offset, d_info->data_count);
4004
4005 free_conv_name:
4006         kfree(conv_name);
4007         return rc;
4008 }
4009
4010 struct smb2_query_dir_private {
4011         struct ksmbd_work       *work;
4012         char                    *search_pattern;
4013         struct ksmbd_file       *dir_fp;
4014
4015         struct ksmbd_dir_info   *d_info;
4016         int                     info_level;
4017 };
4018
4019 static void lock_dir(struct ksmbd_file *dir_fp)
4020 {
4021         struct dentry *dir = dir_fp->filp->f_path.dentry;
4022
4023         inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
4024 }
4025
4026 static void unlock_dir(struct ksmbd_file *dir_fp)
4027 {
4028         struct dentry *dir = dir_fp->filp->f_path.dentry;
4029
4030         inode_unlock(d_inode(dir));
4031 }
4032
4033 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
4034 {
4035         struct mnt_idmap        *idmap = file_mnt_idmap(priv->dir_fp->filp);
4036         struct kstat            kstat;
4037         struct ksmbd_kstat      ksmbd_kstat;
4038         int                     rc;
4039         int                     i;
4040
4041         for (i = 0; i < priv->d_info->num_entry; i++) {
4042                 struct dentry *dent;
4043
4044                 if (dentry_name(priv->d_info, priv->info_level))
4045                         return -EINVAL;
4046
4047                 lock_dir(priv->dir_fp);
4048                 dent = lookup_one(idmap, priv->d_info->name,
4049                                   priv->dir_fp->filp->f_path.dentry,
4050                                   priv->d_info->name_len);
4051                 unlock_dir(priv->dir_fp);
4052
4053                 if (IS_ERR(dent)) {
4054                         ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
4055                                     priv->d_info->name,
4056                                     PTR_ERR(dent));
4057                         continue;
4058                 }
4059                 if (unlikely(d_is_negative(dent))) {
4060                         dput(dent);
4061                         ksmbd_debug(SMB, "Negative dentry `%s'\n",
4062                                     priv->d_info->name);
4063                         continue;
4064                 }
4065
4066                 ksmbd_kstat.kstat = &kstat;
4067                 if (priv->info_level != FILE_NAMES_INFORMATION) {
4068                         rc = ksmbd_vfs_fill_dentry_attrs(priv->work,
4069                                                          idmap,
4070                                                          dent,
4071                                                          &ksmbd_kstat);
4072                         if (rc) {
4073                                 dput(dent);
4074                                 continue;
4075                         }
4076                 }
4077
4078                 rc = smb2_populate_readdir_entry(priv->work->conn,
4079                                                  priv->info_level,
4080                                                  priv->d_info,
4081                                                  &ksmbd_kstat);
4082                 dput(dent);
4083                 if (rc)
4084                         return rc;
4085         }
4086         return 0;
4087 }
4088
4089 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
4090                                    int info_level)
4091 {
4092         int struct_sz;
4093         int conv_len;
4094         int next_entry_offset;
4095
4096         struct_sz = readdir_info_level_struct_sz(info_level);
4097         if (struct_sz == -EOPNOTSUPP)
4098                 return -EOPNOTSUPP;
4099
4100         conv_len = (d_info->name_len + 1) * 2;
4101         next_entry_offset = ALIGN(struct_sz + conv_len,
4102                                   KSMBD_DIR_INFO_ALIGNMENT);
4103
4104         if (next_entry_offset > d_info->out_buf_len) {
4105                 d_info->out_buf_len = 0;
4106                 return -ENOSPC;
4107         }
4108
4109         switch (info_level) {
4110         case FILE_FULL_DIRECTORY_INFORMATION:
4111         {
4112                 struct file_full_directory_info *ffdinfo;
4113
4114                 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
4115                 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
4116                 ffdinfo->FileName[d_info->name_len] = 0x00;
4117                 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4118                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4119                 break;
4120         }
4121         case FILE_BOTH_DIRECTORY_INFORMATION:
4122         {
4123                 struct file_both_directory_info *fbdinfo;
4124
4125                 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
4126                 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
4127                 fbdinfo->FileName[d_info->name_len] = 0x00;
4128                 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4129                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4130                 break;
4131         }
4132         case FILE_DIRECTORY_INFORMATION:
4133         {
4134                 struct file_directory_info *fdinfo;
4135
4136                 fdinfo = (struct file_directory_info *)d_info->wptr;
4137                 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
4138                 fdinfo->FileName[d_info->name_len] = 0x00;
4139                 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4140                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4141                 break;
4142         }
4143         case FILE_NAMES_INFORMATION:
4144         {
4145                 struct file_names_info *fninfo;
4146
4147                 fninfo = (struct file_names_info *)d_info->wptr;
4148                 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
4149                 fninfo->FileName[d_info->name_len] = 0x00;
4150                 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
4151                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4152                 break;
4153         }
4154         case FILEID_FULL_DIRECTORY_INFORMATION:
4155         {
4156                 struct file_id_full_dir_info *dinfo;
4157
4158                 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
4159                 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
4160                 dinfo->FileName[d_info->name_len] = 0x00;
4161                 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4162                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4163                 break;
4164         }
4165         case FILEID_BOTH_DIRECTORY_INFORMATION:
4166         {
4167                 struct file_id_both_directory_info *fibdinfo;
4168
4169                 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
4170                 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
4171                 fibdinfo->FileName[d_info->name_len] = 0x00;
4172                 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4173                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4174                 break;
4175         }
4176         case SMB_FIND_FILE_POSIX_INFO:
4177         {
4178                 struct smb2_posix_info *posix_info;
4179
4180                 posix_info = (struct smb2_posix_info *)d_info->wptr;
4181                 memcpy(posix_info->name, d_info->name, d_info->name_len);
4182                 posix_info->name[d_info->name_len] = 0x00;
4183                 posix_info->name_len = cpu_to_le32(d_info->name_len);
4184                 posix_info->NextEntryOffset =
4185                         cpu_to_le32(next_entry_offset);
4186                 break;
4187         }
4188         } /* switch (info_level) */
4189
4190         d_info->num_entry++;
4191         d_info->out_buf_len -= next_entry_offset;
4192         d_info->wptr += next_entry_offset;
4193         return 0;
4194 }
4195
4196 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
4197                        loff_t offset, u64 ino, unsigned int d_type)
4198 {
4199         struct ksmbd_readdir_data       *buf;
4200         struct smb2_query_dir_private   *priv;
4201         struct ksmbd_dir_info           *d_info;
4202         int                             rc;
4203
4204         buf     = container_of(ctx, struct ksmbd_readdir_data, ctx);
4205         priv    = buf->private;
4206         d_info  = priv->d_info;
4207
4208         /* dot and dotdot entries are already reserved */
4209         if (!strcmp(".", name) || !strcmp("..", name))
4210                 return true;
4211         if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
4212                 return true;
4213         if (!match_pattern(name, namlen, priv->search_pattern))
4214                 return true;
4215
4216         d_info->name            = name;
4217         d_info->name_len        = namlen;
4218         rc = reserve_populate_dentry(d_info, priv->info_level);
4219         if (rc)
4220                 return false;
4221         if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
4222                 d_info->out_buf_len = 0;
4223         return true;
4224 }
4225
4226 static int verify_info_level(int info_level)
4227 {
4228         switch (info_level) {
4229         case FILE_FULL_DIRECTORY_INFORMATION:
4230         case FILE_BOTH_DIRECTORY_INFORMATION:
4231         case FILE_DIRECTORY_INFORMATION:
4232         case FILE_NAMES_INFORMATION:
4233         case FILEID_FULL_DIRECTORY_INFORMATION:
4234         case FILEID_BOTH_DIRECTORY_INFORMATION:
4235         case SMB_FIND_FILE_POSIX_INFO:
4236                 break;
4237         default:
4238                 return -EOPNOTSUPP;
4239         }
4240
4241         return 0;
4242 }
4243
4244 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
4245 {
4246         int free_len;
4247
4248         free_len = (int)(work->response_sz -
4249                 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
4250         return free_len;
4251 }
4252
4253 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
4254                                      unsigned short hdr2_len,
4255                                      unsigned int out_buf_len)
4256 {
4257         int free_len;
4258
4259         if (out_buf_len > work->conn->vals->max_trans_size)
4260                 return -EINVAL;
4261
4262         free_len = smb2_resp_buf_len(work, hdr2_len);
4263         if (free_len < 0)
4264                 return -EINVAL;
4265
4266         return min_t(int, out_buf_len, free_len);
4267 }
4268
4269 int smb2_query_dir(struct ksmbd_work *work)
4270 {
4271         struct ksmbd_conn *conn = work->conn;
4272         struct smb2_query_directory_req *req;
4273         struct smb2_query_directory_rsp *rsp;
4274         struct ksmbd_share_config *share = work->tcon->share_conf;
4275         struct ksmbd_file *dir_fp = NULL;
4276         struct ksmbd_dir_info d_info;
4277         int rc = 0;
4278         char *srch_ptr = NULL;
4279         unsigned char srch_flag;
4280         int buffer_sz;
4281         struct smb2_query_dir_private query_dir_private = {NULL, };
4282
4283         WORK_BUFFERS(work, req, rsp);
4284
4285         if (ksmbd_override_fsids(work)) {
4286                 rsp->hdr.Status = STATUS_NO_MEMORY;
4287                 smb2_set_err_rsp(work);
4288                 return -ENOMEM;
4289         }
4290
4291         rc = verify_info_level(req->FileInformationClass);
4292         if (rc) {
4293                 rc = -EFAULT;
4294                 goto err_out2;
4295         }
4296
4297         dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4298         if (!dir_fp) {
4299                 rc = -EBADF;
4300                 goto err_out2;
4301         }
4302
4303         if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4304             inode_permission(file_mnt_idmap(dir_fp->filp),
4305                              file_inode(dir_fp->filp),
4306                              MAY_READ | MAY_EXEC)) {
4307                 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4308                 rc = -EACCES;
4309                 goto err_out2;
4310         }
4311
4312         if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4313                 pr_err("can't do query dir for a file\n");
4314                 rc = -EINVAL;
4315                 goto err_out2;
4316         }
4317
4318         srch_flag = req->Flags;
4319         srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset),
4320                                           le16_to_cpu(req->FileNameLength), 1,
4321                                           conn->local_nls);
4322         if (IS_ERR(srch_ptr)) {
4323                 ksmbd_debug(SMB, "Search Pattern not found\n");
4324                 rc = -EINVAL;
4325                 goto err_out2;
4326         } else {
4327                 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4328         }
4329
4330         if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4331                 ksmbd_debug(SMB, "Restart directory scan\n");
4332                 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4333         }
4334
4335         memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4336         d_info.wptr = (char *)rsp->Buffer;
4337         d_info.rptr = (char *)rsp->Buffer;
4338         d_info.out_buf_len =
4339                 smb2_calc_max_out_buf_len(work, 8,
4340                                           le32_to_cpu(req->OutputBufferLength));
4341         if (d_info.out_buf_len < 0) {
4342                 rc = -EINVAL;
4343                 goto err_out;
4344         }
4345         d_info.flags = srch_flag;
4346
4347         /*
4348          * reserve dot and dotdot entries in head of buffer
4349          * in first response
4350          */
4351         rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4352                                                dir_fp, &d_info, srch_ptr,
4353                                                smb2_populate_readdir_entry);
4354         if (rc == -ENOSPC)
4355                 rc = 0;
4356         else if (rc)
4357                 goto err_out;
4358
4359         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4360                 d_info.hide_dot_file = true;
4361
4362         buffer_sz                               = d_info.out_buf_len;
4363         d_info.rptr                             = d_info.wptr;
4364         query_dir_private.work                  = work;
4365         query_dir_private.search_pattern        = srch_ptr;
4366         query_dir_private.dir_fp                = dir_fp;
4367         query_dir_private.d_info                = &d_info;
4368         query_dir_private.info_level            = req->FileInformationClass;
4369         dir_fp->readdir_data.private            = &query_dir_private;
4370         set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4371
4372         rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4373         /*
4374          * req->OutputBufferLength is too small to contain even one entry.
4375          * In this case, it immediately returns OutputBufferLength 0 to client.
4376          */
4377         if (!d_info.out_buf_len && !d_info.num_entry)
4378                 goto no_buf_len;
4379         if (rc > 0 || rc == -ENOSPC)
4380                 rc = 0;
4381         else if (rc)
4382                 goto err_out;
4383
4384         d_info.wptr = d_info.rptr;
4385         d_info.out_buf_len = buffer_sz;
4386         rc = process_query_dir_entries(&query_dir_private);
4387         if (rc)
4388                 goto err_out;
4389
4390         if (!d_info.data_count && d_info.out_buf_len >= 0) {
4391                 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4392                         rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4393                 } else {
4394                         dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4395                         rsp->hdr.Status = STATUS_NO_MORE_FILES;
4396                 }
4397                 rsp->StructureSize = cpu_to_le16(9);
4398                 rsp->OutputBufferOffset = cpu_to_le16(0);
4399                 rsp->OutputBufferLength = cpu_to_le32(0);
4400                 rsp->Buffer[0] = 0;
4401                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4402                                        sizeof(struct smb2_query_directory_rsp));
4403                 if (rc)
4404                         goto err_out;
4405         } else {
4406 no_buf_len:
4407                 ((struct file_directory_info *)
4408                 ((char *)rsp->Buffer + d_info.last_entry_offset))
4409                 ->NextEntryOffset = 0;
4410                 if (d_info.data_count >= d_info.last_entry_off_align)
4411                         d_info.data_count -= d_info.last_entry_off_align;
4412
4413                 rsp->StructureSize = cpu_to_le16(9);
4414                 rsp->OutputBufferOffset = cpu_to_le16(72);
4415                 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4416                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4417                                        offsetof(struct smb2_query_directory_rsp, Buffer) +
4418                                        d_info.data_count);
4419                 if (rc)
4420                         goto err_out;
4421         }
4422
4423         kfree(srch_ptr);
4424         ksmbd_fd_put(work, dir_fp);
4425         ksmbd_revert_fsids(work);
4426         return 0;
4427
4428 err_out:
4429         pr_err("error while processing smb2 query dir rc = %d\n", rc);
4430         kfree(srch_ptr);
4431
4432 err_out2:
4433         if (rc == -EINVAL)
4434                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4435         else if (rc == -EACCES)
4436                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4437         else if (rc == -ENOENT)
4438                 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4439         else if (rc == -EBADF)
4440                 rsp->hdr.Status = STATUS_FILE_CLOSED;
4441         else if (rc == -ENOMEM)
4442                 rsp->hdr.Status = STATUS_NO_MEMORY;
4443         else if (rc == -EFAULT)
4444                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4445         else if (rc == -EIO)
4446                 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4447         if (!rsp->hdr.Status)
4448                 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4449
4450         smb2_set_err_rsp(work);
4451         ksmbd_fd_put(work, dir_fp);
4452         ksmbd_revert_fsids(work);
4453         return 0;
4454 }
4455
4456 /**
4457  * buffer_check_err() - helper function to check buffer errors
4458  * @reqOutputBufferLength:      max buffer length expected in command response
4459  * @rsp:                query info response buffer contains output buffer length
4460  * @rsp_org:            base response buffer pointer in case of chained response
4461  *
4462  * Return:      0 on success, otherwise error
4463  */
4464 static int buffer_check_err(int reqOutputBufferLength,
4465                             struct smb2_query_info_rsp *rsp,
4466                             void *rsp_org)
4467 {
4468         if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4469                 pr_err("Invalid Buffer Size Requested\n");
4470                 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4471                 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4472                 return -EINVAL;
4473         }
4474         return 0;
4475 }
4476
4477 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4478                                    void *rsp_org)
4479 {
4480         struct smb2_file_standard_info *sinfo;
4481
4482         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4483
4484         sinfo->AllocationSize = cpu_to_le64(4096);
4485         sinfo->EndOfFile = cpu_to_le64(0);
4486         sinfo->NumberOfLinks = cpu_to_le32(1);
4487         sinfo->DeletePending = 1;
4488         sinfo->Directory = 0;
4489         rsp->OutputBufferLength =
4490                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4491 }
4492
4493 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4494                                    void *rsp_org)
4495 {
4496         struct smb2_file_internal_info *file_info;
4497
4498         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4499
4500         /* any unique number */
4501         file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4502         rsp->OutputBufferLength =
4503                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4504 }
4505
4506 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4507                                    struct smb2_query_info_req *req,
4508                                    struct smb2_query_info_rsp *rsp,
4509                                    void *rsp_org)
4510 {
4511         u64 id;
4512         int rc;
4513
4514         /*
4515          * Windows can sometime send query file info request on
4516          * pipe without opening it, checking error condition here
4517          */
4518         id = req->VolatileFileId;
4519         if (!ksmbd_session_rpc_method(sess, id))
4520                 return -ENOENT;
4521
4522         ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4523                     req->FileInfoClass, req->VolatileFileId);
4524
4525         switch (req->FileInfoClass) {
4526         case FILE_STANDARD_INFORMATION:
4527                 get_standard_info_pipe(rsp, rsp_org);
4528                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4529                                       rsp, rsp_org);
4530                 break;
4531         case FILE_INTERNAL_INFORMATION:
4532                 get_internal_info_pipe(rsp, id, rsp_org);
4533                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4534                                       rsp, rsp_org);
4535                 break;
4536         default:
4537                 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4538                             req->FileInfoClass);
4539                 rc = -EOPNOTSUPP;
4540         }
4541         return rc;
4542 }
4543
4544 /**
4545  * smb2_get_ea() - handler for smb2 get extended attribute command
4546  * @work:       smb work containing query info command buffer
4547  * @fp:         ksmbd_file pointer
4548  * @req:        get extended attribute request
4549  * @rsp:        response buffer pointer
4550  * @rsp_org:    base response buffer pointer in case of chained response
4551  *
4552  * Return:      0 on success, otherwise error
4553  */
4554 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4555                        struct smb2_query_info_req *req,
4556                        struct smb2_query_info_rsp *rsp, void *rsp_org)
4557 {
4558         struct smb2_ea_info *eainfo, *prev_eainfo;
4559         char *name, *ptr, *xattr_list = NULL, *buf;
4560         int rc, name_len, value_len, xattr_list_len, idx;
4561         ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4562         struct smb2_ea_info_req *ea_req = NULL;
4563         const struct path *path;
4564         struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4565
4566         if (!(fp->daccess & FILE_READ_EA_LE)) {
4567                 pr_err("Not permitted to read ext attr : 0x%x\n",
4568                        fp->daccess);
4569                 return -EACCES;
4570         }
4571
4572         path = &fp->filp->f_path;
4573         /* single EA entry is requested with given user.* name */
4574         if (req->InputBufferLength) {
4575                 if (le32_to_cpu(req->InputBufferLength) <
4576                     sizeof(struct smb2_ea_info_req))
4577                         return -EINVAL;
4578
4579                 ea_req = (struct smb2_ea_info_req *)((char *)req +
4580                                                      le16_to_cpu(req->InputBufferOffset));
4581         } else {
4582                 /* need to send all EAs, if no specific EA is requested*/
4583                 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4584                         ksmbd_debug(SMB,
4585                                     "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4586                                     le32_to_cpu(req->Flags));
4587         }
4588
4589         buf_free_len =
4590                 smb2_calc_max_out_buf_len(work, 8,
4591                                           le32_to_cpu(req->OutputBufferLength));
4592         if (buf_free_len < 0)
4593                 return -EINVAL;
4594
4595         rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4596         if (rc < 0) {
4597                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4598                 goto out;
4599         } else if (!rc) { /* there is no EA in the file */
4600                 ksmbd_debug(SMB, "no ea data in the file\n");
4601                 goto done;
4602         }
4603         xattr_list_len = rc;
4604
4605         ptr = (char *)rsp->Buffer;
4606         eainfo = (struct smb2_ea_info *)ptr;
4607         prev_eainfo = eainfo;
4608         idx = 0;
4609
4610         while (idx < xattr_list_len) {
4611                 name = xattr_list + idx;
4612                 name_len = strlen(name);
4613
4614                 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4615                 idx += name_len + 1;
4616
4617                 /*
4618                  * CIFS does not support EA other than user.* namespace,
4619                  * still keep the framework generic, to list other attrs
4620                  * in future.
4621                  */
4622                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4623                         continue;
4624
4625                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4626                              STREAM_PREFIX_LEN))
4627                         continue;
4628
4629                 if (req->InputBufferLength &&
4630                     strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4631                             ea_req->EaNameLength))
4632                         continue;
4633
4634                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4635                              DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4636                         continue;
4637
4638                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4639                         name_len -= XATTR_USER_PREFIX_LEN;
4640
4641                 ptr = eainfo->name + name_len + 1;
4642                 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4643                                 name_len + 1);
4644                 /* bailout if xattr can't fit in buf_free_len */
4645                 value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4646                                                name, &buf);
4647                 if (value_len <= 0) {
4648                         rc = -ENOENT;
4649                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
4650                         goto out;
4651                 }
4652
4653                 buf_free_len -= value_len;
4654                 if (buf_free_len < 0) {
4655                         kfree(buf);
4656                         break;
4657                 }
4658
4659                 memcpy(ptr, buf, value_len);
4660                 kfree(buf);
4661
4662                 ptr += value_len;
4663                 eainfo->Flags = 0;
4664                 eainfo->EaNameLength = name_len;
4665
4666                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4667                         memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4668                                name_len);
4669                 else
4670                         memcpy(eainfo->name, name, name_len);
4671
4672                 eainfo->name[name_len] = '\0';
4673                 eainfo->EaValueLength = cpu_to_le16(value_len);
4674                 next_offset = offsetof(struct smb2_ea_info, name) +
4675                         name_len + 1 + value_len;
4676
4677                 /* align next xattr entry at 4 byte bundary */
4678                 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4679                 if (alignment_bytes) {
4680                         memset(ptr, '\0', alignment_bytes);
4681                         ptr += alignment_bytes;
4682                         next_offset += alignment_bytes;
4683                         buf_free_len -= alignment_bytes;
4684                 }
4685                 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4686                 prev_eainfo = eainfo;
4687                 eainfo = (struct smb2_ea_info *)ptr;
4688                 rsp_data_cnt += next_offset;
4689
4690                 if (req->InputBufferLength) {
4691                         ksmbd_debug(SMB, "single entry requested\n");
4692                         break;
4693                 }
4694         }
4695
4696         /* no more ea entries */
4697         prev_eainfo->NextEntryOffset = 0;
4698 done:
4699         rc = 0;
4700         if (rsp_data_cnt == 0)
4701                 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4702         rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4703 out:
4704         kvfree(xattr_list);
4705         return rc;
4706 }
4707
4708 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4709                                  struct ksmbd_file *fp, void *rsp_org)
4710 {
4711         struct smb2_file_access_info *file_info;
4712
4713         file_info = (struct smb2_file_access_info *)rsp->Buffer;
4714         file_info->AccessFlags = fp->daccess;
4715         rsp->OutputBufferLength =
4716                 cpu_to_le32(sizeof(struct smb2_file_access_info));
4717 }
4718
4719 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4720                                struct ksmbd_file *fp, void *rsp_org)
4721 {
4722         struct smb2_file_basic_info *basic_info;
4723         struct kstat stat;
4724         u64 time;
4725         int ret;
4726
4727         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4728                 pr_err("no right to read the attributes : 0x%x\n",
4729                        fp->daccess);
4730                 return -EACCES;
4731         }
4732
4733         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4734                           AT_STATX_SYNC_AS_STAT);
4735         if (ret)
4736                 return ret;
4737
4738         basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4739         basic_info->CreationTime = cpu_to_le64(fp->create_time);
4740         time = ksmbd_UnixTimeToNT(stat.atime);
4741         basic_info->LastAccessTime = cpu_to_le64(time);
4742         time = ksmbd_UnixTimeToNT(stat.mtime);
4743         basic_info->LastWriteTime = cpu_to_le64(time);
4744         time = ksmbd_UnixTimeToNT(stat.ctime);
4745         basic_info->ChangeTime = cpu_to_le64(time);
4746         basic_info->Attributes = fp->f_ci->m_fattr;
4747         basic_info->Pad1 = 0;
4748         rsp->OutputBufferLength =
4749                 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4750         return 0;
4751 }
4752
4753 static int get_file_standard_info(struct smb2_query_info_rsp *rsp,
4754                                   struct ksmbd_file *fp, void *rsp_org)
4755 {
4756         struct smb2_file_standard_info *sinfo;
4757         unsigned int delete_pending;
4758         struct kstat stat;
4759         int ret;
4760
4761         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4762                           AT_STATX_SYNC_AS_STAT);
4763         if (ret)
4764                 return ret;
4765
4766         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4767         delete_pending = ksmbd_inode_pending_delete(fp);
4768
4769         sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9);
4770         sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4771         sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4772         sinfo->DeletePending = delete_pending;
4773         sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4774         rsp->OutputBufferLength =
4775                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4776
4777         return 0;
4778 }
4779
4780 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4781                                     void *rsp_org)
4782 {
4783         struct smb2_file_alignment_info *file_info;
4784
4785         file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4786         file_info->AlignmentRequirement = 0;
4787         rsp->OutputBufferLength =
4788                 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4789 }
4790
4791 static int get_file_all_info(struct ksmbd_work *work,
4792                              struct smb2_query_info_rsp *rsp,
4793                              struct ksmbd_file *fp,
4794                              void *rsp_org)
4795 {
4796         struct ksmbd_conn *conn = work->conn;
4797         struct smb2_file_all_info *file_info;
4798         unsigned int delete_pending;
4799         struct kstat stat;
4800         int conv_len;
4801         char *filename;
4802         u64 time;
4803         int ret;
4804
4805         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4806                 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4807                             fp->daccess);
4808                 return -EACCES;
4809         }
4810
4811         filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4812         if (IS_ERR(filename))
4813                 return PTR_ERR(filename);
4814
4815         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4816                           AT_STATX_SYNC_AS_STAT);
4817         if (ret)
4818                 return ret;
4819
4820         ksmbd_debug(SMB, "filename = %s\n", filename);
4821         delete_pending = ksmbd_inode_pending_delete(fp);
4822         file_info = (struct smb2_file_all_info *)rsp->Buffer;
4823
4824         file_info->CreationTime = cpu_to_le64(fp->create_time);
4825         time = ksmbd_UnixTimeToNT(stat.atime);
4826         file_info->LastAccessTime = cpu_to_le64(time);
4827         time = ksmbd_UnixTimeToNT(stat.mtime);
4828         file_info->LastWriteTime = cpu_to_le64(time);
4829         time = ksmbd_UnixTimeToNT(stat.ctime);
4830         file_info->ChangeTime = cpu_to_le64(time);
4831         file_info->Attributes = fp->f_ci->m_fattr;
4832         file_info->Pad1 = 0;
4833         file_info->AllocationSize =
4834                 cpu_to_le64(stat.blocks << 9);
4835         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4836         file_info->NumberOfLinks =
4837                         cpu_to_le32(get_nlink(&stat) - delete_pending);
4838         file_info->DeletePending = delete_pending;
4839         file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4840         file_info->Pad2 = 0;
4841         file_info->IndexNumber = cpu_to_le64(stat.ino);
4842         file_info->EASize = 0;
4843         file_info->AccessFlags = fp->daccess;
4844         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4845         file_info->Mode = fp->coption;
4846         file_info->AlignmentRequirement = 0;
4847         conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4848                                      PATH_MAX, conn->local_nls, 0);
4849         conv_len *= 2;
4850         file_info->FileNameLength = cpu_to_le32(conv_len);
4851         rsp->OutputBufferLength =
4852                 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4853         kfree(filename);
4854         return 0;
4855 }
4856
4857 static void get_file_alternate_info(struct ksmbd_work *work,
4858                                     struct smb2_query_info_rsp *rsp,
4859                                     struct ksmbd_file *fp,
4860                                     void *rsp_org)
4861 {
4862         struct ksmbd_conn *conn = work->conn;
4863         struct smb2_file_alt_name_info *file_info;
4864         struct dentry *dentry = fp->filp->f_path.dentry;
4865         int conv_len;
4866
4867         spin_lock(&dentry->d_lock);
4868         file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4869         conv_len = ksmbd_extract_shortname(conn,
4870                                            dentry->d_name.name,
4871                                            file_info->FileName);
4872         spin_unlock(&dentry->d_lock);
4873         file_info->FileNameLength = cpu_to_le32(conv_len);
4874         rsp->OutputBufferLength =
4875                 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4876 }
4877
4878 static int get_file_stream_info(struct ksmbd_work *work,
4879                                 struct smb2_query_info_rsp *rsp,
4880                                 struct ksmbd_file *fp,
4881                                 void *rsp_org)
4882 {
4883         struct ksmbd_conn *conn = work->conn;
4884         struct smb2_file_stream_info *file_info;
4885         char *stream_name, *xattr_list = NULL, *stream_buf;
4886         struct kstat stat;
4887         const struct path *path = &fp->filp->f_path;
4888         ssize_t xattr_list_len;
4889         int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4890         int buf_free_len;
4891         struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4892         int ret;
4893
4894         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4895                           AT_STATX_SYNC_AS_STAT);
4896         if (ret)
4897                 return ret;
4898
4899         file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4900
4901         buf_free_len =
4902                 smb2_calc_max_out_buf_len(work, 8,
4903                                           le32_to_cpu(req->OutputBufferLength));
4904         if (buf_free_len < 0)
4905                 goto out;
4906
4907         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4908         if (xattr_list_len < 0) {
4909                 goto out;
4910         } else if (!xattr_list_len) {
4911                 ksmbd_debug(SMB, "empty xattr in the file\n");
4912                 goto out;
4913         }
4914
4915         while (idx < xattr_list_len) {
4916                 stream_name = xattr_list + idx;
4917                 streamlen = strlen(stream_name);
4918                 idx += streamlen + 1;
4919
4920                 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4921
4922                 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4923                             STREAM_PREFIX, STREAM_PREFIX_LEN))
4924                         continue;
4925
4926                 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4927                                 STREAM_PREFIX_LEN);
4928                 streamlen = stream_name_len;
4929
4930                 /* plus : size */
4931                 streamlen += 1;
4932                 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4933                 if (!stream_buf)
4934                         break;
4935
4936                 streamlen = snprintf(stream_buf, streamlen + 1,
4937                                      ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4938
4939                 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4940                 if (next > buf_free_len) {
4941                         kfree(stream_buf);
4942                         break;
4943                 }
4944
4945                 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4946                 streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
4947                                                stream_buf, streamlen,
4948                                                conn->local_nls, 0);
4949                 streamlen *= 2;
4950                 kfree(stream_buf);
4951                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4952                 file_info->StreamSize = cpu_to_le64(stream_name_len);
4953                 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4954
4955                 nbytes += next;
4956                 buf_free_len -= next;
4957                 file_info->NextEntryOffset = cpu_to_le32(next);
4958         }
4959
4960 out:
4961         if (!S_ISDIR(stat.mode) &&
4962             buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4963                 file_info = (struct smb2_file_stream_info *)
4964                         &rsp->Buffer[nbytes];
4965                 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4966                                               "::$DATA", 7, conn->local_nls, 0);
4967                 streamlen *= 2;
4968                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4969                 file_info->StreamSize = cpu_to_le64(stat.size);
4970                 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4971                 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4972         }
4973
4974         /* last entry offset should be 0 */
4975         file_info->NextEntryOffset = 0;
4976         kvfree(xattr_list);
4977
4978         rsp->OutputBufferLength = cpu_to_le32(nbytes);
4979
4980         return 0;
4981 }
4982
4983 static int get_file_internal_info(struct smb2_query_info_rsp *rsp,
4984                                   struct ksmbd_file *fp, void *rsp_org)
4985 {
4986         struct smb2_file_internal_info *file_info;
4987         struct kstat stat;
4988         int ret;
4989
4990         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4991                           AT_STATX_SYNC_AS_STAT);
4992         if (ret)
4993                 return ret;
4994
4995         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4996         file_info->IndexNumber = cpu_to_le64(stat.ino);
4997         rsp->OutputBufferLength =
4998                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4999
5000         return 0;
5001 }
5002
5003 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
5004                                       struct ksmbd_file *fp, void *rsp_org)
5005 {
5006         struct smb2_file_ntwrk_info *file_info;
5007         struct kstat stat;
5008         u64 time;
5009         int ret;
5010
5011         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5012                 pr_err("no right to read the attributes : 0x%x\n",
5013                        fp->daccess);
5014                 return -EACCES;
5015         }
5016
5017         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5018                           AT_STATX_SYNC_AS_STAT);
5019         if (ret)
5020                 return ret;
5021
5022         file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
5023
5024         file_info->CreationTime = cpu_to_le64(fp->create_time);
5025         time = ksmbd_UnixTimeToNT(stat.atime);
5026         file_info->LastAccessTime = cpu_to_le64(time);
5027         time = ksmbd_UnixTimeToNT(stat.mtime);
5028         file_info->LastWriteTime = cpu_to_le64(time);
5029         time = ksmbd_UnixTimeToNT(stat.ctime);
5030         file_info->ChangeTime = cpu_to_le64(time);
5031         file_info->Attributes = fp->f_ci->m_fattr;
5032         file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5033         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
5034         file_info->Reserved = cpu_to_le32(0);
5035         rsp->OutputBufferLength =
5036                 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
5037         return 0;
5038 }
5039
5040 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
5041 {
5042         struct smb2_file_ea_info *file_info;
5043
5044         file_info = (struct smb2_file_ea_info *)rsp->Buffer;
5045         file_info->EASize = 0;
5046         rsp->OutputBufferLength =
5047                 cpu_to_le32(sizeof(struct smb2_file_ea_info));
5048 }
5049
5050 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
5051                                    struct ksmbd_file *fp, void *rsp_org)
5052 {
5053         struct smb2_file_pos_info *file_info;
5054
5055         file_info = (struct smb2_file_pos_info *)rsp->Buffer;
5056         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
5057         rsp->OutputBufferLength =
5058                 cpu_to_le32(sizeof(struct smb2_file_pos_info));
5059 }
5060
5061 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
5062                                struct ksmbd_file *fp, void *rsp_org)
5063 {
5064         struct smb2_file_mode_info *file_info;
5065
5066         file_info = (struct smb2_file_mode_info *)rsp->Buffer;
5067         file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
5068         rsp->OutputBufferLength =
5069                 cpu_to_le32(sizeof(struct smb2_file_mode_info));
5070 }
5071
5072 static int get_file_compression_info(struct smb2_query_info_rsp *rsp,
5073                                      struct ksmbd_file *fp, void *rsp_org)
5074 {
5075         struct smb2_file_comp_info *file_info;
5076         struct kstat stat;
5077         int ret;
5078
5079         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5080                           AT_STATX_SYNC_AS_STAT);
5081         if (ret)
5082                 return ret;
5083
5084         file_info = (struct smb2_file_comp_info *)rsp->Buffer;
5085         file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
5086         file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
5087         file_info->CompressionUnitShift = 0;
5088         file_info->ChunkShift = 0;
5089         file_info->ClusterShift = 0;
5090         memset(&file_info->Reserved[0], 0, 3);
5091
5092         rsp->OutputBufferLength =
5093                 cpu_to_le32(sizeof(struct smb2_file_comp_info));
5094
5095         return 0;
5096 }
5097
5098 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
5099                                        struct ksmbd_file *fp, void *rsp_org)
5100 {
5101         struct smb2_file_attr_tag_info *file_info;
5102
5103         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5104                 pr_err("no right to read the attributes : 0x%x\n",
5105                        fp->daccess);
5106                 return -EACCES;
5107         }
5108
5109         file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
5110         file_info->FileAttributes = fp->f_ci->m_fattr;
5111         file_info->ReparseTag = 0;
5112         rsp->OutputBufferLength =
5113                 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
5114         return 0;
5115 }
5116
5117 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
5118                                 struct ksmbd_file *fp, void *rsp_org)
5119 {
5120         struct smb311_posix_qinfo *file_info;
5121         struct inode *inode = file_inode(fp->filp);
5122         struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
5123         vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
5124         vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
5125         struct kstat stat;
5126         u64 time;
5127         int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
5128         int ret;
5129
5130         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5131                           AT_STATX_SYNC_AS_STAT);
5132         if (ret)
5133                 return ret;
5134
5135         file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
5136         file_info->CreationTime = cpu_to_le64(fp->create_time);
5137         time = ksmbd_UnixTimeToNT(stat.atime);
5138         file_info->LastAccessTime = cpu_to_le64(time);
5139         time = ksmbd_UnixTimeToNT(stat.mtime);
5140         file_info->LastWriteTime = cpu_to_le64(time);
5141         time = ksmbd_UnixTimeToNT(stat.ctime);
5142         file_info->ChangeTime = cpu_to_le64(time);
5143         file_info->DosAttributes = fp->f_ci->m_fattr;
5144         file_info->Inode = cpu_to_le64(stat.ino);
5145         file_info->EndOfFile = cpu_to_le64(stat.size);
5146         file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5147         file_info->HardLinks = cpu_to_le32(stat.nlink);
5148         file_info->Mode = cpu_to_le32(stat.mode & 0777);
5149         file_info->DeviceId = cpu_to_le32(stat.rdev);
5150
5151         /*
5152          * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
5153          * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
5154          *                sub_auth(4 * 1(num_subauth)) + RID(4).
5155          */
5156         id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
5157                   SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
5158         id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
5159                   SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
5160
5161         rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
5162
5163         return 0;
5164 }
5165
5166 static int smb2_get_info_file(struct ksmbd_work *work,
5167                               struct smb2_query_info_req *req,
5168                               struct smb2_query_info_rsp *rsp)
5169 {
5170         struct ksmbd_file *fp;
5171         int fileinfoclass = 0;
5172         int rc = 0;
5173         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5174
5175         if (test_share_config_flag(work->tcon->share_conf,
5176                                    KSMBD_SHARE_FLAG_PIPE)) {
5177                 /* smb2 info file called for pipe */
5178                 return smb2_get_info_file_pipe(work->sess, req, rsp,
5179                                                work->response_buf);
5180         }
5181
5182         if (work->next_smb2_rcv_hdr_off) {
5183                 if (!has_file_id(req->VolatileFileId)) {
5184                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5185                                     work->compound_fid);
5186                         id = work->compound_fid;
5187                         pid = work->compound_pfid;
5188                 }
5189         }
5190
5191         if (!has_file_id(id)) {
5192                 id = req->VolatileFileId;
5193                 pid = req->PersistentFileId;
5194         }
5195
5196         fp = ksmbd_lookup_fd_slow(work, id, pid);
5197         if (!fp)
5198                 return -ENOENT;
5199
5200         fileinfoclass = req->FileInfoClass;
5201
5202         switch (fileinfoclass) {
5203         case FILE_ACCESS_INFORMATION:
5204                 get_file_access_info(rsp, fp, work->response_buf);
5205                 break;
5206
5207         case FILE_BASIC_INFORMATION:
5208                 rc = get_file_basic_info(rsp, fp, work->response_buf);
5209                 break;
5210
5211         case FILE_STANDARD_INFORMATION:
5212                 rc = get_file_standard_info(rsp, fp, work->response_buf);
5213                 break;
5214
5215         case FILE_ALIGNMENT_INFORMATION:
5216                 get_file_alignment_info(rsp, work->response_buf);
5217                 break;
5218
5219         case FILE_ALL_INFORMATION:
5220                 rc = get_file_all_info(work, rsp, fp, work->response_buf);
5221                 break;
5222
5223         case FILE_ALTERNATE_NAME_INFORMATION:
5224                 get_file_alternate_info(work, rsp, fp, work->response_buf);
5225                 break;
5226
5227         case FILE_STREAM_INFORMATION:
5228                 rc = get_file_stream_info(work, rsp, fp, work->response_buf);
5229                 break;
5230
5231         case FILE_INTERNAL_INFORMATION:
5232                 rc = get_file_internal_info(rsp, fp, work->response_buf);
5233                 break;
5234
5235         case FILE_NETWORK_OPEN_INFORMATION:
5236                 rc = get_file_network_open_info(rsp, fp, work->response_buf);
5237                 break;
5238
5239         case FILE_EA_INFORMATION:
5240                 get_file_ea_info(rsp, work->response_buf);
5241                 break;
5242
5243         case FILE_FULL_EA_INFORMATION:
5244                 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
5245                 break;
5246
5247         case FILE_POSITION_INFORMATION:
5248                 get_file_position_info(rsp, fp, work->response_buf);
5249                 break;
5250
5251         case FILE_MODE_INFORMATION:
5252                 get_file_mode_info(rsp, fp, work->response_buf);
5253                 break;
5254
5255         case FILE_COMPRESSION_INFORMATION:
5256                 rc = get_file_compression_info(rsp, fp, work->response_buf);
5257                 break;
5258
5259         case FILE_ATTRIBUTE_TAG_INFORMATION:
5260                 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
5261                 break;
5262         case SMB_FIND_FILE_POSIX_INFO:
5263                 if (!work->tcon->posix_extensions) {
5264                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5265                         rc = -EOPNOTSUPP;
5266                 } else {
5267                         rc = find_file_posix_info(rsp, fp, work->response_buf);
5268                 }
5269                 break;
5270         default:
5271                 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
5272                             fileinfoclass);
5273                 rc = -EOPNOTSUPP;
5274         }
5275         if (!rc)
5276                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5277                                       rsp, work->response_buf);
5278         ksmbd_fd_put(work, fp);
5279         return rc;
5280 }
5281
5282 static int smb2_get_info_filesystem(struct ksmbd_work *work,
5283                                     struct smb2_query_info_req *req,
5284                                     struct smb2_query_info_rsp *rsp)
5285 {
5286         struct ksmbd_session *sess = work->sess;
5287         struct ksmbd_conn *conn = work->conn;
5288         struct ksmbd_share_config *share = work->tcon->share_conf;
5289         int fsinfoclass = 0;
5290         struct kstatfs stfs;
5291         struct path path;
5292         int rc = 0, len;
5293
5294         if (!share->path)
5295                 return -EIO;
5296
5297         rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
5298         if (rc) {
5299                 pr_err("cannot create vfs path\n");
5300                 return -EIO;
5301         }
5302
5303         rc = vfs_statfs(&path, &stfs);
5304         if (rc) {
5305                 pr_err("cannot do stat of path %s\n", share->path);
5306                 path_put(&path);
5307                 return -EIO;
5308         }
5309
5310         fsinfoclass = req->FileInfoClass;
5311
5312         switch (fsinfoclass) {
5313         case FS_DEVICE_INFORMATION:
5314         {
5315                 struct filesystem_device_info *info;
5316
5317                 info = (struct filesystem_device_info *)rsp->Buffer;
5318
5319                 info->DeviceType = cpu_to_le32(stfs.f_type);
5320                 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
5321                 rsp->OutputBufferLength = cpu_to_le32(8);
5322                 break;
5323         }
5324         case FS_ATTRIBUTE_INFORMATION:
5325         {
5326                 struct filesystem_attribute_info *info;
5327                 size_t sz;
5328
5329                 info = (struct filesystem_attribute_info *)rsp->Buffer;
5330                 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5331                                                FILE_PERSISTENT_ACLS |
5332                                                FILE_UNICODE_ON_DISK |
5333                                                FILE_CASE_PRESERVED_NAMES |
5334                                                FILE_CASE_SENSITIVE_SEARCH |
5335                                                FILE_SUPPORTS_BLOCK_REFCOUNTING);
5336
5337                 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5338
5339                 if (test_share_config_flag(work->tcon->share_conf,
5340                     KSMBD_SHARE_FLAG_STREAMS))
5341                         info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5342
5343                 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5344                 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5345                                         "NTFS", PATH_MAX, conn->local_nls, 0);
5346                 len = len * 2;
5347                 info->FileSystemNameLen = cpu_to_le32(len);
5348                 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
5349                 rsp->OutputBufferLength = cpu_to_le32(sz);
5350                 break;
5351         }
5352         case FS_VOLUME_INFORMATION:
5353         {
5354                 struct filesystem_vol_info *info;
5355                 size_t sz;
5356                 unsigned int serial_crc = 0;
5357
5358                 info = (struct filesystem_vol_info *)(rsp->Buffer);
5359                 info->VolumeCreationTime = 0;
5360                 serial_crc = crc32_le(serial_crc, share->name,
5361                                       strlen(share->name));
5362                 serial_crc = crc32_le(serial_crc, share->path,
5363                                       strlen(share->path));
5364                 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5365                                       strlen(ksmbd_netbios_name()));
5366                 /* Taking dummy value of serial number*/
5367                 info->SerialNumber = cpu_to_le32(serial_crc);
5368                 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5369                                         share->name, PATH_MAX,
5370                                         conn->local_nls, 0);
5371                 len = len * 2;
5372                 info->VolumeLabelSize = cpu_to_le32(len);
5373                 info->Reserved = 0;
5374                 sz = sizeof(struct filesystem_vol_info) - 2 + len;
5375                 rsp->OutputBufferLength = cpu_to_le32(sz);
5376                 break;
5377         }
5378         case FS_SIZE_INFORMATION:
5379         {
5380                 struct filesystem_info *info;
5381
5382                 info = (struct filesystem_info *)(rsp->Buffer);
5383                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5384                 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5385                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5386                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5387                 rsp->OutputBufferLength = cpu_to_le32(24);
5388                 break;
5389         }
5390         case FS_FULL_SIZE_INFORMATION:
5391         {
5392                 struct smb2_fs_full_size_info *info;
5393
5394                 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5395                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5396                 info->CallerAvailableAllocationUnits =
5397                                         cpu_to_le64(stfs.f_bavail);
5398                 info->ActualAvailableAllocationUnits =
5399                                         cpu_to_le64(stfs.f_bfree);
5400                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5401                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5402                 rsp->OutputBufferLength = cpu_to_le32(32);
5403                 break;
5404         }
5405         case FS_OBJECT_ID_INFORMATION:
5406         {
5407                 struct object_id_info *info;
5408
5409                 info = (struct object_id_info *)(rsp->Buffer);
5410
5411                 if (!user_guest(sess->user))
5412                         memcpy(info->objid, user_passkey(sess->user), 16);
5413                 else
5414                         memset(info->objid, 0, 16);
5415
5416                 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5417                 info->extended_info.version = cpu_to_le32(1);
5418                 info->extended_info.release = cpu_to_le32(1);
5419                 info->extended_info.rel_date = 0;
5420                 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5421                 rsp->OutputBufferLength = cpu_to_le32(64);
5422                 break;
5423         }
5424         case FS_SECTOR_SIZE_INFORMATION:
5425         {
5426                 struct smb3_fs_ss_info *info;
5427                 unsigned int sector_size =
5428                         min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5429
5430                 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5431
5432                 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5433                 info->PhysicalBytesPerSectorForAtomicity =
5434                                 cpu_to_le32(sector_size);
5435                 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5436                 info->FSEffPhysicalBytesPerSectorForAtomicity =
5437                                 cpu_to_le32(sector_size);
5438                 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5439                                     SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5440                 info->ByteOffsetForSectorAlignment = 0;
5441                 info->ByteOffsetForPartitionAlignment = 0;
5442                 rsp->OutputBufferLength = cpu_to_le32(28);
5443                 break;
5444         }
5445         case FS_CONTROL_INFORMATION:
5446         {
5447                 /*
5448                  * TODO : The current implementation is based on
5449                  * test result with win7(NTFS) server. It's need to
5450                  * modify this to get valid Quota values
5451                  * from Linux kernel
5452                  */
5453                 struct smb2_fs_control_info *info;
5454
5455                 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5456                 info->FreeSpaceStartFiltering = 0;
5457                 info->FreeSpaceThreshold = 0;
5458                 info->FreeSpaceStopFiltering = 0;
5459                 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5460                 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5461                 info->Padding = 0;
5462                 rsp->OutputBufferLength = cpu_to_le32(48);
5463                 break;
5464         }
5465         case FS_POSIX_INFORMATION:
5466         {
5467                 struct filesystem_posix_info *info;
5468
5469                 if (!work->tcon->posix_extensions) {
5470                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5471                         rc = -EOPNOTSUPP;
5472                 } else {
5473                         info = (struct filesystem_posix_info *)(rsp->Buffer);
5474                         info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5475                         info->BlockSize = cpu_to_le32(stfs.f_bsize);
5476                         info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5477                         info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5478                         info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5479                         info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5480                         info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5481                         rsp->OutputBufferLength = cpu_to_le32(56);
5482                 }
5483                 break;
5484         }
5485         default:
5486                 path_put(&path);
5487                 return -EOPNOTSUPP;
5488         }
5489         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5490                               rsp, work->response_buf);
5491         path_put(&path);
5492         return rc;
5493 }
5494
5495 static int smb2_get_info_sec(struct ksmbd_work *work,
5496                              struct smb2_query_info_req *req,
5497                              struct smb2_query_info_rsp *rsp)
5498 {
5499         struct ksmbd_file *fp;
5500         struct mnt_idmap *idmap;
5501         struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5502         struct smb_fattr fattr = {{0}};
5503         struct inode *inode;
5504         __u32 secdesclen = 0;
5505         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5506         int addition_info = le32_to_cpu(req->AdditionalInformation);
5507         int rc = 0, ppntsd_size = 0;
5508
5509         if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5510                               PROTECTED_DACL_SECINFO |
5511                               UNPROTECTED_DACL_SECINFO)) {
5512                 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5513                        addition_info);
5514
5515                 pntsd->revision = cpu_to_le16(1);
5516                 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5517                 pntsd->osidoffset = 0;
5518                 pntsd->gsidoffset = 0;
5519                 pntsd->sacloffset = 0;
5520                 pntsd->dacloffset = 0;
5521
5522                 secdesclen = sizeof(struct smb_ntsd);
5523                 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5524
5525                 return 0;
5526         }
5527
5528         if (work->next_smb2_rcv_hdr_off) {
5529                 if (!has_file_id(req->VolatileFileId)) {
5530                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5531                                     work->compound_fid);
5532                         id = work->compound_fid;
5533                         pid = work->compound_pfid;
5534                 }
5535         }
5536
5537         if (!has_file_id(id)) {
5538                 id = req->VolatileFileId;
5539                 pid = req->PersistentFileId;
5540         }
5541
5542         fp = ksmbd_lookup_fd_slow(work, id, pid);
5543         if (!fp)
5544                 return -ENOENT;
5545
5546         idmap = file_mnt_idmap(fp->filp);
5547         inode = file_inode(fp->filp);
5548         ksmbd_acls_fattr(&fattr, idmap, inode);
5549
5550         if (test_share_config_flag(work->tcon->share_conf,
5551                                    KSMBD_SHARE_FLAG_ACL_XATTR))
5552                 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5553                                                      fp->filp->f_path.dentry,
5554                                                      &ppntsd);
5555
5556         /* Check if sd buffer size exceeds response buffer size */
5557         if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5558                 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5559                                     addition_info, &secdesclen, &fattr);
5560         posix_acl_release(fattr.cf_acls);
5561         posix_acl_release(fattr.cf_dacls);
5562         kfree(ppntsd);
5563         ksmbd_fd_put(work, fp);
5564         if (rc)
5565                 return rc;
5566
5567         rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5568         return 0;
5569 }
5570
5571 /**
5572  * smb2_query_info() - handler for smb2 query info command
5573  * @work:       smb work containing query info request buffer
5574  *
5575  * Return:      0 on success, otherwise error
5576  */
5577 int smb2_query_info(struct ksmbd_work *work)
5578 {
5579         struct smb2_query_info_req *req;
5580         struct smb2_query_info_rsp *rsp;
5581         int rc = 0;
5582
5583         WORK_BUFFERS(work, req, rsp);
5584
5585         ksmbd_debug(SMB, "GOT query info request\n");
5586
5587         switch (req->InfoType) {
5588         case SMB2_O_INFO_FILE:
5589                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5590                 rc = smb2_get_info_file(work, req, rsp);
5591                 break;
5592         case SMB2_O_INFO_FILESYSTEM:
5593                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5594                 rc = smb2_get_info_filesystem(work, req, rsp);
5595                 break;
5596         case SMB2_O_INFO_SECURITY:
5597                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5598                 rc = smb2_get_info_sec(work, req, rsp);
5599                 break;
5600         default:
5601                 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5602                             req->InfoType);
5603                 rc = -EOPNOTSUPP;
5604         }
5605
5606         if (!rc) {
5607                 rsp->StructureSize = cpu_to_le16(9);
5608                 rsp->OutputBufferOffset = cpu_to_le16(72);
5609                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5610                                        offsetof(struct smb2_query_info_rsp, Buffer) +
5611                                         le32_to_cpu(rsp->OutputBufferLength));
5612         }
5613
5614         if (rc < 0) {
5615                 if (rc == -EACCES)
5616                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
5617                 else if (rc == -ENOENT)
5618                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5619                 else if (rc == -EIO)
5620                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5621                 else if (rc == -ENOMEM)
5622                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5623                 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5624                         rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5625                 smb2_set_err_rsp(work);
5626
5627                 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5628                             rc);
5629                 return rc;
5630         }
5631         return 0;
5632 }
5633
5634 /**
5635  * smb2_close_pipe() - handler for closing IPC pipe
5636  * @work:       smb work containing close request buffer
5637  *
5638  * Return:      0
5639  */
5640 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5641 {
5642         u64 id;
5643         struct smb2_close_req *req;
5644         struct smb2_close_rsp *rsp;
5645
5646         WORK_BUFFERS(work, req, rsp);
5647
5648         id = req->VolatileFileId;
5649         ksmbd_session_rpc_close(work->sess, id);
5650
5651         rsp->StructureSize = cpu_to_le16(60);
5652         rsp->Flags = 0;
5653         rsp->Reserved = 0;
5654         rsp->CreationTime = 0;
5655         rsp->LastAccessTime = 0;
5656         rsp->LastWriteTime = 0;
5657         rsp->ChangeTime = 0;
5658         rsp->AllocationSize = 0;
5659         rsp->EndOfFile = 0;
5660         rsp->Attributes = 0;
5661
5662         return ksmbd_iov_pin_rsp(work, (void *)rsp,
5663                                  sizeof(struct smb2_close_rsp));
5664 }
5665
5666 /**
5667  * smb2_close() - handler for smb2 close file command
5668  * @work:       smb work containing close request buffer
5669  *
5670  * Return:      0
5671  */
5672 int smb2_close(struct ksmbd_work *work)
5673 {
5674         u64 volatile_id = KSMBD_NO_FID;
5675         u64 sess_id;
5676         struct smb2_close_req *req;
5677         struct smb2_close_rsp *rsp;
5678         struct ksmbd_conn *conn = work->conn;
5679         struct ksmbd_file *fp;
5680         u64 time;
5681         int err = 0;
5682
5683         WORK_BUFFERS(work, req, rsp);
5684
5685         if (test_share_config_flag(work->tcon->share_conf,
5686                                    KSMBD_SHARE_FLAG_PIPE)) {
5687                 ksmbd_debug(SMB, "IPC pipe close request\n");
5688                 return smb2_close_pipe(work);
5689         }
5690
5691         sess_id = le64_to_cpu(req->hdr.SessionId);
5692         if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5693                 sess_id = work->compound_sid;
5694
5695         work->compound_sid = 0;
5696         if (check_session_id(conn, sess_id)) {
5697                 work->compound_sid = sess_id;
5698         } else {
5699                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5700                 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5701                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5702                 err = -EBADF;
5703                 goto out;
5704         }
5705
5706         if (work->next_smb2_rcv_hdr_off &&
5707             !has_file_id(req->VolatileFileId)) {
5708                 if (!has_file_id(work->compound_fid)) {
5709                         /* file already closed, return FILE_CLOSED */
5710                         ksmbd_debug(SMB, "file already closed\n");
5711                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5712                         err = -EBADF;
5713                         goto out;
5714                 } else {
5715                         ksmbd_debug(SMB,
5716                                     "Compound request set FID = %llu:%llu\n",
5717                                     work->compound_fid,
5718                                     work->compound_pfid);
5719                         volatile_id = work->compound_fid;
5720
5721                         /* file closed, stored id is not valid anymore */
5722                         work->compound_fid = KSMBD_NO_FID;
5723                         work->compound_pfid = KSMBD_NO_FID;
5724                 }
5725         } else {
5726                 volatile_id = req->VolatileFileId;
5727         }
5728         ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5729
5730         rsp->StructureSize = cpu_to_le16(60);
5731         rsp->Reserved = 0;
5732
5733         if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5734                 struct kstat stat;
5735                 int ret;
5736
5737                 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5738                 if (!fp) {
5739                         err = -ENOENT;
5740                         goto out;
5741                 }
5742
5743                 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5744                                   AT_STATX_SYNC_AS_STAT);
5745                 if (ret) {
5746                         ksmbd_fd_put(work, fp);
5747                         goto out;
5748                 }
5749
5750                 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5751                 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
5752                         cpu_to_le64(stat.blocks << 9);
5753                 rsp->EndOfFile = cpu_to_le64(stat.size);
5754                 rsp->Attributes = fp->f_ci->m_fattr;
5755                 rsp->CreationTime = cpu_to_le64(fp->create_time);
5756                 time = ksmbd_UnixTimeToNT(stat.atime);
5757                 rsp->LastAccessTime = cpu_to_le64(time);
5758                 time = ksmbd_UnixTimeToNT(stat.mtime);
5759                 rsp->LastWriteTime = cpu_to_le64(time);
5760                 time = ksmbd_UnixTimeToNT(stat.ctime);
5761                 rsp->ChangeTime = cpu_to_le64(time);
5762                 ksmbd_fd_put(work, fp);
5763         } else {
5764                 rsp->Flags = 0;
5765                 rsp->AllocationSize = 0;
5766                 rsp->EndOfFile = 0;
5767                 rsp->Attributes = 0;
5768                 rsp->CreationTime = 0;
5769                 rsp->LastAccessTime = 0;
5770                 rsp->LastWriteTime = 0;
5771                 rsp->ChangeTime = 0;
5772         }
5773
5774         err = ksmbd_close_fd(work, volatile_id);
5775 out:
5776         if (!err)
5777                 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5778                                         sizeof(struct smb2_close_rsp));
5779
5780         if (err) {
5781                 if (rsp->hdr.Status == 0)
5782                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5783                 smb2_set_err_rsp(work);
5784         }
5785
5786         return err;
5787 }
5788
5789 /**
5790  * smb2_echo() - handler for smb2 echo(ping) command
5791  * @work:       smb work containing echo request buffer
5792  *
5793  * Return:      0
5794  */
5795 int smb2_echo(struct ksmbd_work *work)
5796 {
5797         struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5798
5799         if (work->next_smb2_rcv_hdr_off)
5800                 rsp = ksmbd_resp_buf_next(work);
5801
5802         rsp->StructureSize = cpu_to_le16(4);
5803         rsp->Reserved = 0;
5804         return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5805 }
5806
5807 static int smb2_rename(struct ksmbd_work *work,
5808                        struct ksmbd_file *fp,
5809                        struct smb2_file_rename_info *file_info,
5810                        struct nls_table *local_nls)
5811 {
5812         struct ksmbd_share_config *share = fp->tcon->share_conf;
5813         char *new_name = NULL;
5814         int rc, flags = 0;
5815
5816         ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5817         new_name = smb2_get_name(file_info->FileName,
5818                                  le32_to_cpu(file_info->FileNameLength),
5819                                  local_nls);
5820         if (IS_ERR(new_name))
5821                 return PTR_ERR(new_name);
5822
5823         if (strchr(new_name, ':')) {
5824                 int s_type;
5825                 char *xattr_stream_name, *stream_name = NULL;
5826                 size_t xattr_stream_size;
5827                 int len;
5828
5829                 rc = parse_stream_name(new_name, &stream_name, &s_type);
5830                 if (rc < 0)
5831                         goto out;
5832
5833                 len = strlen(new_name);
5834                 if (len > 0 && new_name[len - 1] != '/') {
5835                         pr_err("not allow base filename in rename\n");
5836                         rc = -ESHARE;
5837                         goto out;
5838                 }
5839
5840                 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5841                                                  &xattr_stream_name,
5842                                                  &xattr_stream_size,
5843                                                  s_type);
5844                 if (rc)
5845                         goto out;
5846
5847                 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5848                                         &fp->filp->f_path,
5849                                         xattr_stream_name,
5850                                         NULL, 0, 0, true);
5851                 if (rc < 0) {
5852                         pr_err("failed to store stream name in xattr: %d\n",
5853                                rc);
5854                         rc = -EINVAL;
5855                         goto out;
5856                 }
5857
5858                 goto out;
5859         }
5860
5861         ksmbd_debug(SMB, "new name %s\n", new_name);
5862         if (ksmbd_share_veto_filename(share, new_name)) {
5863                 rc = -ENOENT;
5864                 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5865                 goto out;
5866         }
5867
5868         if (!file_info->ReplaceIfExists)
5869                 flags = RENAME_NOREPLACE;
5870
5871         rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5872         if (!rc)
5873                 smb_break_all_levII_oplock(work, fp, 0);
5874 out:
5875         kfree(new_name);
5876         return rc;
5877 }
5878
5879 static int smb2_create_link(struct ksmbd_work *work,
5880                             struct ksmbd_share_config *share,
5881                             struct smb2_file_link_info *file_info,
5882                             unsigned int buf_len, struct file *filp,
5883                             struct nls_table *local_nls)
5884 {
5885         char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5886         struct path path, parent_path;
5887         bool file_present = false;
5888         int rc;
5889
5890         if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5891                         le32_to_cpu(file_info->FileNameLength))
5892                 return -EINVAL;
5893
5894         ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5895         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5896         if (!pathname)
5897                 return -ENOMEM;
5898
5899         link_name = smb2_get_name(file_info->FileName,
5900                                   le32_to_cpu(file_info->FileNameLength),
5901                                   local_nls);
5902         if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5903                 rc = -EINVAL;
5904                 goto out;
5905         }
5906
5907         ksmbd_debug(SMB, "link name is %s\n", link_name);
5908         target_name = file_path(filp, pathname, PATH_MAX);
5909         if (IS_ERR(target_name)) {
5910                 rc = -EINVAL;
5911                 goto out;
5912         }
5913
5914         ksmbd_debug(SMB, "target name is %s\n", target_name);
5915         rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
5916                                         &parent_path, &path, 0);
5917         if (rc) {
5918                 if (rc != -ENOENT)
5919                         goto out;
5920         } else
5921                 file_present = true;
5922
5923         if (file_info->ReplaceIfExists) {
5924                 if (file_present) {
5925                         rc = ksmbd_vfs_remove_file(work, &path);
5926                         if (rc) {
5927                                 rc = -EINVAL;
5928                                 ksmbd_debug(SMB, "cannot delete %s\n",
5929                                             link_name);
5930                                 goto out;
5931                         }
5932                 }
5933         } else {
5934                 if (file_present) {
5935                         rc = -EEXIST;
5936                         ksmbd_debug(SMB, "link already exists\n");
5937                         goto out;
5938                 }
5939         }
5940
5941         rc = ksmbd_vfs_link(work, target_name, link_name);
5942         if (rc)
5943                 rc = -EINVAL;
5944 out:
5945         if (file_present)
5946                 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
5947
5948         if (!IS_ERR(link_name))
5949                 kfree(link_name);
5950         kfree(pathname);
5951         return rc;
5952 }
5953
5954 static int set_file_basic_info(struct ksmbd_file *fp,
5955                                struct smb2_file_basic_info *file_info,
5956                                struct ksmbd_share_config *share)
5957 {
5958         struct iattr attrs;
5959         struct file *filp;
5960         struct inode *inode;
5961         struct mnt_idmap *idmap;
5962         int rc = 0;
5963
5964         if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5965                 return -EACCES;
5966
5967         attrs.ia_valid = 0;
5968         filp = fp->filp;
5969         inode = file_inode(filp);
5970         idmap = file_mnt_idmap(filp);
5971
5972         if (file_info->CreationTime)
5973                 fp->create_time = le64_to_cpu(file_info->CreationTime);
5974
5975         if (file_info->LastAccessTime) {
5976                 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5977                 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5978         }
5979
5980         attrs.ia_valid |= ATTR_CTIME;
5981         if (file_info->ChangeTime)
5982                 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5983         else
5984                 attrs.ia_ctime = inode_get_ctime(inode);
5985
5986         if (file_info->LastWriteTime) {
5987                 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5988                 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5989         }
5990
5991         if (file_info->Attributes) {
5992                 if (!S_ISDIR(inode->i_mode) &&
5993                     file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5994                         pr_err("can't change a file to a directory\n");
5995                         return -EINVAL;
5996                 }
5997
5998                 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5999                         fp->f_ci->m_fattr = file_info->Attributes |
6000                                 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
6001         }
6002
6003         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
6004             (file_info->CreationTime || file_info->Attributes)) {
6005                 struct xattr_dos_attrib da = {0};
6006
6007                 da.version = 4;
6008                 da.itime = fp->itime;
6009                 da.create_time = fp->create_time;
6010                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
6011                 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
6012                         XATTR_DOSINFO_ITIME;
6013
6014                 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
6015                                 true);
6016                 if (rc)
6017                         ksmbd_debug(SMB,
6018                                     "failed to restore file attribute in EA\n");
6019                 rc = 0;
6020         }
6021
6022         if (attrs.ia_valid) {
6023                 struct dentry *dentry = filp->f_path.dentry;
6024                 struct inode *inode = d_inode(dentry);
6025
6026                 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
6027                         return -EACCES;
6028
6029                 inode_lock(inode);
6030                 inode_set_ctime_to_ts(inode, attrs.ia_ctime);
6031                 attrs.ia_valid &= ~ATTR_CTIME;
6032                 rc = notify_change(idmap, dentry, &attrs, NULL);
6033                 inode_unlock(inode);
6034         }
6035         return rc;
6036 }
6037
6038 static int set_file_allocation_info(struct ksmbd_work *work,
6039                                     struct ksmbd_file *fp,
6040                                     struct smb2_file_alloc_info *file_alloc_info)
6041 {
6042         /*
6043          * TODO : It's working fine only when store dos attributes
6044          * is not yes. need to implement a logic which works
6045          * properly with any smb.conf option
6046          */
6047
6048         loff_t alloc_blks;
6049         struct inode *inode;
6050         struct kstat stat;
6051         int rc;
6052
6053         if (!(fp->daccess & FILE_WRITE_DATA_LE))
6054                 return -EACCES;
6055
6056         rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
6057                          AT_STATX_SYNC_AS_STAT);
6058         if (rc)
6059                 return rc;
6060
6061         alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
6062         inode = file_inode(fp->filp);
6063
6064         if (alloc_blks > stat.blocks) {
6065                 smb_break_all_levII_oplock(work, fp, 1);
6066                 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
6067                                    alloc_blks * 512);
6068                 if (rc && rc != -EOPNOTSUPP) {
6069                         pr_err("vfs_fallocate is failed : %d\n", rc);
6070                         return rc;
6071                 }
6072         } else if (alloc_blks < stat.blocks) {
6073                 loff_t size;
6074
6075                 /*
6076                  * Allocation size could be smaller than original one
6077                  * which means allocated blocks in file should be
6078                  * deallocated. use truncate to cut out it, but inode
6079                  * size is also updated with truncate offset.
6080                  * inode size is retained by backup inode size.
6081                  */
6082                 size = i_size_read(inode);
6083                 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
6084                 if (rc) {
6085                         pr_err("truncate failed!, err %d\n", rc);
6086                         return rc;
6087                 }
6088                 if (size < alloc_blks * 512)
6089                         i_size_write(inode, size);
6090         }
6091         return 0;
6092 }
6093
6094 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6095                                 struct smb2_file_eof_info *file_eof_info)
6096 {
6097         loff_t newsize;
6098         struct inode *inode;
6099         int rc;
6100
6101         if (!(fp->daccess & FILE_WRITE_DATA_LE))
6102                 return -EACCES;
6103
6104         newsize = le64_to_cpu(file_eof_info->EndOfFile);
6105         inode = file_inode(fp->filp);
6106
6107         /*
6108          * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
6109          * on FAT32 shared device, truncate execution time is too long
6110          * and network error could cause from windows client. because
6111          * truncate of some filesystem like FAT32 fill zero data in
6112          * truncated range.
6113          */
6114         if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
6115                 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
6116                 rc = ksmbd_vfs_truncate(work, fp, newsize);
6117                 if (rc) {
6118                         ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
6119                         if (rc != -EAGAIN)
6120                                 rc = -EBADF;
6121                         return rc;
6122                 }
6123         }
6124         return 0;
6125 }
6126
6127 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6128                            struct smb2_file_rename_info *rename_info,
6129                            unsigned int buf_len)
6130 {
6131         if (!(fp->daccess & FILE_DELETE_LE)) {
6132                 pr_err("no right to delete : 0x%x\n", fp->daccess);
6133                 return -EACCES;
6134         }
6135
6136         if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
6137                         le32_to_cpu(rename_info->FileNameLength))
6138                 return -EINVAL;
6139
6140         if (!le32_to_cpu(rename_info->FileNameLength))
6141                 return -EINVAL;
6142
6143         return smb2_rename(work, fp, rename_info, work->conn->local_nls);
6144 }
6145
6146 static int set_file_disposition_info(struct ksmbd_file *fp,
6147                                      struct smb2_file_disposition_info *file_info)
6148 {
6149         struct inode *inode;
6150
6151         if (!(fp->daccess & FILE_DELETE_LE)) {
6152                 pr_err("no right to delete : 0x%x\n", fp->daccess);
6153                 return -EACCES;
6154         }
6155
6156         inode = file_inode(fp->filp);
6157         if (file_info->DeletePending) {
6158                 if (S_ISDIR(inode->i_mode) &&
6159                     ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
6160                         return -EBUSY;
6161                 ksmbd_set_inode_pending_delete(fp);
6162         } else {
6163                 ksmbd_clear_inode_pending_delete(fp);
6164         }
6165         return 0;
6166 }
6167
6168 static int set_file_position_info(struct ksmbd_file *fp,
6169                                   struct smb2_file_pos_info *file_info)
6170 {
6171         loff_t current_byte_offset;
6172         unsigned long sector_size;
6173         struct inode *inode;
6174
6175         inode = file_inode(fp->filp);
6176         current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
6177         sector_size = inode->i_sb->s_blocksize;
6178
6179         if (current_byte_offset < 0 ||
6180             (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
6181              current_byte_offset & (sector_size - 1))) {
6182                 pr_err("CurrentByteOffset is not valid : %llu\n",
6183                        current_byte_offset);
6184                 return -EINVAL;
6185         }
6186
6187         fp->filp->f_pos = current_byte_offset;
6188         return 0;
6189 }
6190
6191 static int set_file_mode_info(struct ksmbd_file *fp,
6192                               struct smb2_file_mode_info *file_info)
6193 {
6194         __le32 mode;
6195
6196         mode = file_info->Mode;
6197
6198         if ((mode & ~FILE_MODE_INFO_MASK)) {
6199                 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
6200                 return -EINVAL;
6201         }
6202
6203         /*
6204          * TODO : need to implement consideration for
6205          * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
6206          */
6207         ksmbd_vfs_set_fadvise(fp->filp, mode);
6208         fp->coption = mode;
6209         return 0;
6210 }
6211
6212 /**
6213  * smb2_set_info_file() - handler for smb2 set info command
6214  * @work:       smb work containing set info command buffer
6215  * @fp:         ksmbd_file pointer
6216  * @req:        request buffer pointer
6217  * @share:      ksmbd_share_config pointer
6218  *
6219  * Return:      0 on success, otherwise error
6220  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
6221  */
6222 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
6223                               struct smb2_set_info_req *req,
6224                               struct ksmbd_share_config *share)
6225 {
6226         unsigned int buf_len = le32_to_cpu(req->BufferLength);
6227         char *buffer = (char *)req + le16_to_cpu(req->BufferOffset);
6228
6229         switch (req->FileInfoClass) {
6230         case FILE_BASIC_INFORMATION:
6231         {
6232                 if (buf_len < sizeof(struct smb2_file_basic_info))
6233                         return -EINVAL;
6234
6235                 return set_file_basic_info(fp, (struct smb2_file_basic_info *)buffer, share);
6236         }
6237         case FILE_ALLOCATION_INFORMATION:
6238         {
6239                 if (buf_len < sizeof(struct smb2_file_alloc_info))
6240                         return -EINVAL;
6241
6242                 return set_file_allocation_info(work, fp,
6243                                                 (struct smb2_file_alloc_info *)buffer);
6244         }
6245         case FILE_END_OF_FILE_INFORMATION:
6246         {
6247                 if (buf_len < sizeof(struct smb2_file_eof_info))
6248                         return -EINVAL;
6249
6250                 return set_end_of_file_info(work, fp,
6251                                             (struct smb2_file_eof_info *)buffer);
6252         }
6253         case FILE_RENAME_INFORMATION:
6254         {
6255                 if (buf_len < sizeof(struct smb2_file_rename_info))
6256                         return -EINVAL;
6257
6258                 return set_rename_info(work, fp,
6259                                        (struct smb2_file_rename_info *)buffer,
6260                                        buf_len);
6261         }
6262         case FILE_LINK_INFORMATION:
6263         {
6264                 if (buf_len < sizeof(struct smb2_file_link_info))
6265                         return -EINVAL;
6266
6267                 return smb2_create_link(work, work->tcon->share_conf,
6268                                         (struct smb2_file_link_info *)buffer,
6269                                         buf_len, fp->filp,
6270                                         work->conn->local_nls);
6271         }
6272         case FILE_DISPOSITION_INFORMATION:
6273         {
6274                 if (buf_len < sizeof(struct smb2_file_disposition_info))
6275                         return -EINVAL;
6276
6277                 return set_file_disposition_info(fp,
6278                                                  (struct smb2_file_disposition_info *)buffer);
6279         }
6280         case FILE_FULL_EA_INFORMATION:
6281         {
6282                 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
6283                         pr_err("Not permitted to write ext  attr: 0x%x\n",
6284                                fp->daccess);
6285                         return -EACCES;
6286                 }
6287
6288                 if (buf_len < sizeof(struct smb2_ea_info))
6289                         return -EINVAL;
6290
6291                 return smb2_set_ea((struct smb2_ea_info *)buffer,
6292                                    buf_len, &fp->filp->f_path, true);
6293         }
6294         case FILE_POSITION_INFORMATION:
6295         {
6296                 if (buf_len < sizeof(struct smb2_file_pos_info))
6297                         return -EINVAL;
6298
6299                 return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer);
6300         }
6301         case FILE_MODE_INFORMATION:
6302         {
6303                 if (buf_len < sizeof(struct smb2_file_mode_info))
6304                         return -EINVAL;
6305
6306                 return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer);
6307         }
6308         }
6309
6310         pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6311         return -EOPNOTSUPP;
6312 }
6313
6314 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6315                              char *buffer, int buf_len)
6316 {
6317         struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6318
6319         fp->saccess |= FILE_SHARE_DELETE_LE;
6320
6321         return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6322                         buf_len, false, true);
6323 }
6324
6325 /**
6326  * smb2_set_info() - handler for smb2 set info command handler
6327  * @work:       smb work containing set info request buffer
6328  *
6329  * Return:      0 on success, otherwise error
6330  */
6331 int smb2_set_info(struct ksmbd_work *work)
6332 {
6333         struct smb2_set_info_req *req;
6334         struct smb2_set_info_rsp *rsp;
6335         struct ksmbd_file *fp = NULL;
6336         int rc = 0;
6337         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6338
6339         ksmbd_debug(SMB, "Received set info request\n");
6340
6341         if (work->next_smb2_rcv_hdr_off) {
6342                 req = ksmbd_req_buf_next(work);
6343                 rsp = ksmbd_resp_buf_next(work);
6344                 if (!has_file_id(req->VolatileFileId)) {
6345                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6346                                     work->compound_fid);
6347                         id = work->compound_fid;
6348                         pid = work->compound_pfid;
6349                 }
6350         } else {
6351                 req = smb2_get_msg(work->request_buf);
6352                 rsp = smb2_get_msg(work->response_buf);
6353         }
6354
6355         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6356                 ksmbd_debug(SMB, "User does not have write permission\n");
6357                 pr_err("User does not have write permission\n");
6358                 rc = -EACCES;
6359                 goto err_out;
6360         }
6361
6362         if (!has_file_id(id)) {
6363                 id = req->VolatileFileId;
6364                 pid = req->PersistentFileId;
6365         }
6366
6367         fp = ksmbd_lookup_fd_slow(work, id, pid);
6368         if (!fp) {
6369                 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6370                 rc = -ENOENT;
6371                 goto err_out;
6372         }
6373
6374         switch (req->InfoType) {
6375         case SMB2_O_INFO_FILE:
6376                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6377                 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6378                 break;
6379         case SMB2_O_INFO_SECURITY:
6380                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6381                 if (ksmbd_override_fsids(work)) {
6382                         rc = -ENOMEM;
6383                         goto err_out;
6384                 }
6385                 rc = smb2_set_info_sec(fp,
6386                                        le32_to_cpu(req->AdditionalInformation),
6387                                        (char *)req + le16_to_cpu(req->BufferOffset),
6388                                        le32_to_cpu(req->BufferLength));
6389                 ksmbd_revert_fsids(work);
6390                 break;
6391         default:
6392                 rc = -EOPNOTSUPP;
6393         }
6394
6395         if (rc < 0)
6396                 goto err_out;
6397
6398         rsp->StructureSize = cpu_to_le16(2);
6399         rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6400                                sizeof(struct smb2_set_info_rsp));
6401         if (rc)
6402                 goto err_out;
6403         ksmbd_fd_put(work, fp);
6404         return 0;
6405
6406 err_out:
6407         if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6408                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6409         else if (rc == -EINVAL)
6410                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6411         else if (rc == -ESHARE)
6412                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6413         else if (rc == -ENOENT)
6414                 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6415         else if (rc == -EBUSY || rc == -ENOTEMPTY)
6416                 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6417         else if (rc == -EAGAIN)
6418                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6419         else if (rc == -EBADF || rc == -ESTALE)
6420                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6421         else if (rc == -EEXIST)
6422                 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6423         else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6424                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6425         smb2_set_err_rsp(work);
6426         ksmbd_fd_put(work, fp);
6427         ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6428         return rc;
6429 }
6430
6431 /**
6432  * smb2_read_pipe() - handler for smb2 read from IPC pipe
6433  * @work:       smb work containing read IPC pipe command buffer
6434  *
6435  * Return:      0 on success, otherwise error
6436  */
6437 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6438 {
6439         int nbytes = 0, err;
6440         u64 id;
6441         struct ksmbd_rpc_command *rpc_resp;
6442         struct smb2_read_req *req;
6443         struct smb2_read_rsp *rsp;
6444
6445         WORK_BUFFERS(work, req, rsp);
6446
6447         id = req->VolatileFileId;
6448
6449         rpc_resp = ksmbd_rpc_read(work->sess, id);
6450         if (rpc_resp) {
6451                 void *aux_payload_buf;
6452
6453                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6454                         err = -EINVAL;
6455                         goto out;
6456                 }
6457
6458                 aux_payload_buf =
6459                         kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);
6460                 if (!aux_payload_buf) {
6461                         err = -ENOMEM;
6462                         goto out;
6463                 }
6464
6465                 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6466
6467                 nbytes = rpc_resp->payload_sz;
6468                 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6469                                              offsetof(struct smb2_read_rsp, Buffer),
6470                                              aux_payload_buf, nbytes);
6471                 if (err) {
6472                         kvfree(aux_payload_buf);
6473                         goto out;
6474                 }
6475                 kvfree(rpc_resp);
6476         } else {
6477                 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6478                                         offsetof(struct smb2_read_rsp, Buffer));
6479                 if (err)
6480                         goto out;
6481         }
6482
6483         rsp->StructureSize = cpu_to_le16(17);
6484         rsp->DataOffset = 80;
6485         rsp->Reserved = 0;
6486         rsp->DataLength = cpu_to_le32(nbytes);
6487         rsp->DataRemaining = 0;
6488         rsp->Flags = 0;
6489         return 0;
6490
6491 out:
6492         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6493         smb2_set_err_rsp(work);
6494         kvfree(rpc_resp);
6495         return err;
6496 }
6497
6498 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6499                                         struct smb2_buffer_desc_v1 *desc,
6500                                         __le32 Channel,
6501                                         __le16 ChannelInfoLength)
6502 {
6503         unsigned int i, ch_count;
6504
6505         if (work->conn->dialect == SMB30_PROT_ID &&
6506             Channel != SMB2_CHANNEL_RDMA_V1)
6507                 return -EINVAL;
6508
6509         ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6510         if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6511                 for (i = 0; i < ch_count; i++) {
6512                         pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6513                                 i,
6514                                 le32_to_cpu(desc[i].token),
6515                                 le32_to_cpu(desc[i].length));
6516                 }
6517         }
6518         if (!ch_count)
6519                 return -EINVAL;
6520
6521         work->need_invalidate_rkey =
6522                 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6523         if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6524                 work->remote_key = le32_to_cpu(desc->token);
6525         return 0;
6526 }
6527
6528 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6529                                       struct smb2_read_req *req, void *data_buf,
6530                                       size_t length)
6531 {
6532         int err;
6533
6534         err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6535                                     (struct smb2_buffer_desc_v1 *)
6536                                     ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6537                                     le16_to_cpu(req->ReadChannelInfoLength));
6538         if (err)
6539                 return err;
6540
6541         return length;
6542 }
6543
6544 /**
6545  * smb2_read() - handler for smb2 read from file
6546  * @work:       smb work containing read command buffer
6547  *
6548  * Return:      0 on success, otherwise error
6549  */
6550 int smb2_read(struct ksmbd_work *work)
6551 {
6552         struct ksmbd_conn *conn = work->conn;
6553         struct smb2_read_req *req;
6554         struct smb2_read_rsp *rsp;
6555         struct ksmbd_file *fp = NULL;
6556         loff_t offset;
6557         size_t length, mincount;
6558         ssize_t nbytes = 0, remain_bytes = 0;
6559         int err = 0;
6560         bool is_rdma_channel = false;
6561         unsigned int max_read_size = conn->vals->max_read_size;
6562         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6563         void *aux_payload_buf;
6564
6565         if (test_share_config_flag(work->tcon->share_conf,
6566                                    KSMBD_SHARE_FLAG_PIPE)) {
6567                 ksmbd_debug(SMB, "IPC pipe read request\n");
6568                 return smb2_read_pipe(work);
6569         }
6570
6571         if (work->next_smb2_rcv_hdr_off) {
6572                 req = ksmbd_req_buf_next(work);
6573                 rsp = ksmbd_resp_buf_next(work);
6574                 if (!has_file_id(req->VolatileFileId)) {
6575                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6576                                         work->compound_fid);
6577                         id = work->compound_fid;
6578                         pid = work->compound_pfid;
6579                 }
6580         } else {
6581                 req = smb2_get_msg(work->request_buf);
6582                 rsp = smb2_get_msg(work->response_buf);
6583         }
6584
6585         if (!has_file_id(id)) {
6586                 id = req->VolatileFileId;
6587                 pid = req->PersistentFileId;
6588         }
6589
6590         if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6591             req->Channel == SMB2_CHANNEL_RDMA_V1) {
6592                 is_rdma_channel = true;
6593                 max_read_size = get_smbd_max_read_write_size();
6594         }
6595
6596         if (is_rdma_channel == true) {
6597                 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6598
6599                 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6600                         err = -EINVAL;
6601                         goto out;
6602                 }
6603                 err = smb2_set_remote_key_for_rdma(work,
6604                                                    (struct smb2_buffer_desc_v1 *)
6605                                                    ((char *)req + ch_offset),
6606                                                    req->Channel,
6607                                                    req->ReadChannelInfoLength);
6608                 if (err)
6609                         goto out;
6610         }
6611
6612         fp = ksmbd_lookup_fd_slow(work, id, pid);
6613         if (!fp) {
6614                 err = -ENOENT;
6615                 goto out;
6616         }
6617
6618         if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6619                 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6620                 err = -EACCES;
6621                 goto out;
6622         }
6623
6624         offset = le64_to_cpu(req->Offset);
6625         length = le32_to_cpu(req->Length);
6626         mincount = le32_to_cpu(req->MinimumCount);
6627
6628         if (length > max_read_size) {
6629                 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6630                             max_read_size);
6631                 err = -EINVAL;
6632                 goto out;
6633         }
6634
6635         ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6636                     fp->filp, offset, length);
6637
6638         aux_payload_buf = kvzalloc(length, GFP_KERNEL);
6639         if (!aux_payload_buf) {
6640                 err = -ENOMEM;
6641                 goto out;
6642         }
6643
6644         nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6645         if (nbytes < 0) {
6646                 err = nbytes;
6647                 goto out;
6648         }
6649
6650         if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6651                 kvfree(aux_payload_buf);
6652                 rsp->hdr.Status = STATUS_END_OF_FILE;
6653                 smb2_set_err_rsp(work);
6654                 ksmbd_fd_put(work, fp);
6655                 return 0;
6656         }
6657
6658         ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6659                     nbytes, offset, mincount);
6660
6661         if (is_rdma_channel == true) {
6662                 /* write data to the client using rdma channel */
6663                 remain_bytes = smb2_read_rdma_channel(work, req,
6664                                                       aux_payload_buf,
6665                                                       nbytes);
6666                 kvfree(aux_payload_buf);
6667                 aux_payload_buf = NULL;
6668                 nbytes = 0;
6669                 if (remain_bytes < 0) {
6670                         err = (int)remain_bytes;
6671                         goto out;
6672                 }
6673         }
6674
6675         rsp->StructureSize = cpu_to_le16(17);
6676         rsp->DataOffset = 80;
6677         rsp->Reserved = 0;
6678         rsp->DataLength = cpu_to_le32(nbytes);
6679         rsp->DataRemaining = cpu_to_le32(remain_bytes);
6680         rsp->Flags = 0;
6681         err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6682                                      offsetof(struct smb2_read_rsp, Buffer),
6683                                      aux_payload_buf, nbytes);
6684         if (err) {
6685                 kvfree(aux_payload_buf);
6686                 goto out;
6687         }
6688         ksmbd_fd_put(work, fp);
6689         return 0;
6690
6691 out:
6692         if (err) {
6693                 if (err == -EISDIR)
6694                         rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6695                 else if (err == -EAGAIN)
6696                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6697                 else if (err == -ENOENT)
6698                         rsp->hdr.Status = STATUS_FILE_CLOSED;
6699                 else if (err == -EACCES)
6700                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
6701                 else if (err == -ESHARE)
6702                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6703                 else if (err == -EINVAL)
6704                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6705                 else
6706                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6707
6708                 smb2_set_err_rsp(work);
6709         }
6710         ksmbd_fd_put(work, fp);
6711         return err;
6712 }
6713
6714 /**
6715  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6716  * @work:       smb work containing write IPC pipe command buffer
6717  *
6718  * Return:      0 on success, otherwise error
6719  */
6720 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6721 {
6722         struct smb2_write_req *req;
6723         struct smb2_write_rsp *rsp;
6724         struct ksmbd_rpc_command *rpc_resp;
6725         u64 id = 0;
6726         int err = 0, ret = 0;
6727         char *data_buf;
6728         size_t length;
6729
6730         WORK_BUFFERS(work, req, rsp);
6731
6732         length = le32_to_cpu(req->Length);
6733         id = req->VolatileFileId;
6734
6735         if ((u64)le16_to_cpu(req->DataOffset) + length >
6736             get_rfc1002_len(work->request_buf)) {
6737                 pr_err("invalid write data offset %u, smb_len %u\n",
6738                        le16_to_cpu(req->DataOffset),
6739                        get_rfc1002_len(work->request_buf));
6740                 err = -EINVAL;
6741                 goto out;
6742         }
6743
6744         data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6745                            le16_to_cpu(req->DataOffset));
6746
6747         rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6748         if (rpc_resp) {
6749                 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6750                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6751                         kvfree(rpc_resp);
6752                         smb2_set_err_rsp(work);
6753                         return -EOPNOTSUPP;
6754                 }
6755                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6756                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6757                         smb2_set_err_rsp(work);
6758                         kvfree(rpc_resp);
6759                         return ret;
6760                 }
6761                 kvfree(rpc_resp);
6762         }
6763
6764         rsp->StructureSize = cpu_to_le16(17);
6765         rsp->DataOffset = 0;
6766         rsp->Reserved = 0;
6767         rsp->DataLength = cpu_to_le32(length);
6768         rsp->DataRemaining = 0;
6769         rsp->Reserved2 = 0;
6770         err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6771                                 offsetof(struct smb2_write_rsp, Buffer));
6772 out:
6773         if (err) {
6774                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6775                 smb2_set_err_rsp(work);
6776         }
6777
6778         return err;
6779 }
6780
6781 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6782                                        struct smb2_write_req *req,
6783                                        struct ksmbd_file *fp,
6784                                        loff_t offset, size_t length, bool sync)
6785 {
6786         char *data_buf;
6787         int ret;
6788         ssize_t nbytes;
6789
6790         data_buf = kvzalloc(length, GFP_KERNEL);
6791         if (!data_buf)
6792                 return -ENOMEM;
6793
6794         ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6795                                    (struct smb2_buffer_desc_v1 *)
6796                                    ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6797                                    le16_to_cpu(req->WriteChannelInfoLength));
6798         if (ret < 0) {
6799                 kvfree(data_buf);
6800                 return ret;
6801         }
6802
6803         ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6804         kvfree(data_buf);
6805         if (ret < 0)
6806                 return ret;
6807
6808         return nbytes;
6809 }
6810
6811 /**
6812  * smb2_write() - handler for smb2 write from file
6813  * @work:       smb work containing write command buffer
6814  *
6815  * Return:      0 on success, otherwise error
6816  */
6817 int smb2_write(struct ksmbd_work *work)
6818 {
6819         struct smb2_write_req *req;
6820         struct smb2_write_rsp *rsp;
6821         struct ksmbd_file *fp = NULL;
6822         loff_t offset;
6823         size_t length;
6824         ssize_t nbytes;
6825         char *data_buf;
6826         bool writethrough = false, is_rdma_channel = false;
6827         int err = 0;
6828         unsigned int max_write_size = work->conn->vals->max_write_size;
6829
6830         WORK_BUFFERS(work, req, rsp);
6831
6832         if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6833                 ksmbd_debug(SMB, "IPC pipe write request\n");
6834                 return smb2_write_pipe(work);
6835         }
6836
6837         offset = le64_to_cpu(req->Offset);
6838         length = le32_to_cpu(req->Length);
6839
6840         if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6841             req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6842                 is_rdma_channel = true;
6843                 max_write_size = get_smbd_max_read_write_size();
6844                 length = le32_to_cpu(req->RemainingBytes);
6845         }
6846
6847         if (is_rdma_channel == true) {
6848                 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6849
6850                 if (req->Length != 0 || req->DataOffset != 0 ||
6851                     ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6852                         err = -EINVAL;
6853                         goto out;
6854                 }
6855                 err = smb2_set_remote_key_for_rdma(work,
6856                                                    (struct smb2_buffer_desc_v1 *)
6857                                                    ((char *)req + ch_offset),
6858                                                    req->Channel,
6859                                                    req->WriteChannelInfoLength);
6860                 if (err)
6861                         goto out;
6862         }
6863
6864         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6865                 ksmbd_debug(SMB, "User does not have write permission\n");
6866                 err = -EACCES;
6867                 goto out;
6868         }
6869
6870         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6871         if (!fp) {
6872                 err = -ENOENT;
6873                 goto out;
6874         }
6875
6876         if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6877                 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6878                 err = -EACCES;
6879                 goto out;
6880         }
6881
6882         if (length > max_write_size) {
6883                 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6884                             max_write_size);
6885                 err = -EINVAL;
6886                 goto out;
6887         }
6888
6889         ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6890         if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6891                 writethrough = true;
6892
6893         if (is_rdma_channel == false) {
6894                 if (le16_to_cpu(req->DataOffset) <
6895                     offsetof(struct smb2_write_req, Buffer)) {
6896                         err = -EINVAL;
6897                         goto out;
6898                 }
6899
6900                 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6901                                     le16_to_cpu(req->DataOffset));
6902
6903                 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6904                             fp->filp, offset, length);
6905                 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6906                                       writethrough, &nbytes);
6907                 if (err < 0)
6908                         goto out;
6909         } else {
6910                 /* read data from the client using rdma channel, and
6911                  * write the data.
6912                  */
6913                 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6914                                                  writethrough);
6915                 if (nbytes < 0) {
6916                         err = (int)nbytes;
6917                         goto out;
6918                 }
6919         }
6920
6921         rsp->StructureSize = cpu_to_le16(17);
6922         rsp->DataOffset = 0;
6923         rsp->Reserved = 0;
6924         rsp->DataLength = cpu_to_le32(nbytes);
6925         rsp->DataRemaining = 0;
6926         rsp->Reserved2 = 0;
6927         err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
6928         if (err)
6929                 goto out;
6930         ksmbd_fd_put(work, fp);
6931         return 0;
6932
6933 out:
6934         if (err == -EAGAIN)
6935                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6936         else if (err == -ENOSPC || err == -EFBIG)
6937                 rsp->hdr.Status = STATUS_DISK_FULL;
6938         else if (err == -ENOENT)
6939                 rsp->hdr.Status = STATUS_FILE_CLOSED;
6940         else if (err == -EACCES)
6941                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6942         else if (err == -ESHARE)
6943                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6944         else if (err == -EINVAL)
6945                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6946         else
6947                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6948
6949         smb2_set_err_rsp(work);
6950         ksmbd_fd_put(work, fp);
6951         return err;
6952 }
6953
6954 /**
6955  * smb2_flush() - handler for smb2 flush file - fsync
6956  * @work:       smb work containing flush command buffer
6957  *
6958  * Return:      0 on success, otherwise error
6959  */
6960 int smb2_flush(struct ksmbd_work *work)
6961 {
6962         struct smb2_flush_req *req;
6963         struct smb2_flush_rsp *rsp;
6964         int err;
6965
6966         WORK_BUFFERS(work, req, rsp);
6967
6968         ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6969
6970         err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6971         if (err)
6972                 goto out;
6973
6974         rsp->StructureSize = cpu_to_le16(4);
6975         rsp->Reserved = 0;
6976         return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
6977
6978 out:
6979         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6980         smb2_set_err_rsp(work);
6981         return err;
6982 }
6983
6984 /**
6985  * smb2_cancel() - handler for smb2 cancel command
6986  * @work:       smb work containing cancel command buffer
6987  *
6988  * Return:      0 on success, otherwise error
6989  */
6990 int smb2_cancel(struct ksmbd_work *work)
6991 {
6992         struct ksmbd_conn *conn = work->conn;
6993         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6994         struct smb2_hdr *chdr;
6995         struct ksmbd_work *iter;
6996         struct list_head *command_list;
6997
6998         if (work->next_smb2_rcv_hdr_off)
6999                 hdr = ksmbd_resp_buf_next(work);
7000
7001         ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
7002                     hdr->MessageId, hdr->Flags);
7003
7004         if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
7005                 command_list = &conn->async_requests;
7006
7007                 spin_lock(&conn->request_lock);
7008                 list_for_each_entry(iter, command_list,
7009                                     async_request_entry) {
7010                         chdr = smb2_get_msg(iter->request_buf);
7011
7012                         if (iter->async_id !=
7013                             le64_to_cpu(hdr->Id.AsyncId))
7014                                 continue;
7015
7016                         ksmbd_debug(SMB,
7017                                     "smb2 with AsyncId %llu cancelled command = 0x%x\n",
7018                                     le64_to_cpu(hdr->Id.AsyncId),
7019                                     le16_to_cpu(chdr->Command));
7020                         iter->state = KSMBD_WORK_CANCELLED;
7021                         if (iter->cancel_fn)
7022                                 iter->cancel_fn(iter->cancel_argv);
7023                         break;
7024                 }
7025                 spin_unlock(&conn->request_lock);
7026         } else {
7027                 command_list = &conn->requests;
7028
7029                 spin_lock(&conn->request_lock);
7030                 list_for_each_entry(iter, command_list, request_entry) {
7031                         chdr = smb2_get_msg(iter->request_buf);
7032
7033                         if (chdr->MessageId != hdr->MessageId ||
7034                             iter == work)
7035                                 continue;
7036
7037                         ksmbd_debug(SMB,
7038                                     "smb2 with mid %llu cancelled command = 0x%x\n",
7039                                     le64_to_cpu(hdr->MessageId),
7040                                     le16_to_cpu(chdr->Command));
7041                         iter->state = KSMBD_WORK_CANCELLED;
7042                         break;
7043                 }
7044                 spin_unlock(&conn->request_lock);
7045         }
7046
7047         /* For SMB2_CANCEL command itself send no response*/
7048         work->send_no_response = 1;
7049         return 0;
7050 }
7051
7052 struct file_lock *smb_flock_init(struct file *f)
7053 {
7054         struct file_lock *fl;
7055
7056         fl = locks_alloc_lock();
7057         if (!fl)
7058                 goto out;
7059
7060         locks_init_lock(fl);
7061
7062         fl->c.flc_owner = f;
7063         fl->c.flc_pid = current->tgid;
7064         fl->c.flc_file = f;
7065         fl->c.flc_flags = FL_POSIX;
7066         fl->fl_ops = NULL;
7067         fl->fl_lmops = NULL;
7068
7069 out:
7070         return fl;
7071 }
7072
7073 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
7074 {
7075         int cmd = -EINVAL;
7076
7077         /* Checking for wrong flag combination during lock request*/
7078         switch (flags) {
7079         case SMB2_LOCKFLAG_SHARED:
7080                 ksmbd_debug(SMB, "received shared request\n");
7081                 cmd = F_SETLKW;
7082                 flock->c.flc_type = F_RDLCK;
7083                 flock->c.flc_flags |= FL_SLEEP;
7084                 break;
7085         case SMB2_LOCKFLAG_EXCLUSIVE:
7086                 ksmbd_debug(SMB, "received exclusive request\n");
7087                 cmd = F_SETLKW;
7088                 flock->c.flc_type = F_WRLCK;
7089                 flock->c.flc_flags |= FL_SLEEP;
7090                 break;
7091         case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7092                 ksmbd_debug(SMB,
7093                             "received shared & fail immediately request\n");
7094                 cmd = F_SETLK;
7095                 flock->c.flc_type = F_RDLCK;
7096                 break;
7097         case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7098                 ksmbd_debug(SMB,
7099                             "received exclusive & fail immediately request\n");
7100                 cmd = F_SETLK;
7101                 flock->c.flc_type = F_WRLCK;
7102                 break;
7103         case SMB2_LOCKFLAG_UNLOCK:
7104                 ksmbd_debug(SMB, "received unlock request\n");
7105                 flock->c.flc_type = F_UNLCK;
7106                 cmd = F_SETLK;
7107                 break;
7108         }
7109
7110         return cmd;
7111 }
7112
7113 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
7114                                          unsigned int cmd, int flags,
7115                                          struct list_head *lock_list)
7116 {
7117         struct ksmbd_lock *lock;
7118
7119         lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
7120         if (!lock)
7121                 return NULL;
7122
7123         lock->cmd = cmd;
7124         lock->fl = flock;
7125         lock->start = flock->fl_start;
7126         lock->end = flock->fl_end;
7127         lock->flags = flags;
7128         if (lock->start == lock->end)
7129                 lock->zero_len = 1;
7130         INIT_LIST_HEAD(&lock->clist);
7131         INIT_LIST_HEAD(&lock->flist);
7132         INIT_LIST_HEAD(&lock->llist);
7133         list_add_tail(&lock->llist, lock_list);
7134
7135         return lock;
7136 }
7137
7138 static void smb2_remove_blocked_lock(void **argv)
7139 {
7140         struct file_lock *flock = (struct file_lock *)argv[0];
7141
7142         ksmbd_vfs_posix_lock_unblock(flock);
7143         locks_wake_up(flock);
7144 }
7145
7146 static inline bool lock_defer_pending(struct file_lock *fl)
7147 {
7148         /* check pending lock waiters */
7149         return waitqueue_active(&fl->c.flc_wait);
7150 }
7151
7152 /**
7153  * smb2_lock() - handler for smb2 file lock command
7154  * @work:       smb work containing lock command buffer
7155  *
7156  * Return:      0 on success, otherwise error
7157  */
7158 int smb2_lock(struct ksmbd_work *work)
7159 {
7160         struct smb2_lock_req *req;
7161         struct smb2_lock_rsp *rsp;
7162         struct smb2_lock_element *lock_ele;
7163         struct ksmbd_file *fp = NULL;
7164         struct file_lock *flock = NULL;
7165         struct file *filp = NULL;
7166         int lock_count;
7167         int flags = 0;
7168         int cmd = 0;
7169         int err = -EIO, i, rc = 0;
7170         u64 lock_start, lock_length;
7171         struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
7172         struct ksmbd_conn *conn;
7173         int nolock = 0;
7174         LIST_HEAD(lock_list);
7175         LIST_HEAD(rollback_list);
7176         int prior_lock = 0;
7177
7178         WORK_BUFFERS(work, req, rsp);
7179
7180         ksmbd_debug(SMB, "Received lock request\n");
7181         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7182         if (!fp) {
7183                 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
7184                 err = -ENOENT;
7185                 goto out2;
7186         }
7187
7188         filp = fp->filp;
7189         lock_count = le16_to_cpu(req->LockCount);
7190         lock_ele = req->locks;
7191
7192         ksmbd_debug(SMB, "lock count is %d\n", lock_count);
7193         if (!lock_count) {
7194                 err = -EINVAL;
7195                 goto out2;
7196         }
7197
7198         for (i = 0; i < lock_count; i++) {
7199                 flags = le32_to_cpu(lock_ele[i].Flags);
7200
7201                 flock = smb_flock_init(filp);
7202                 if (!flock)
7203                         goto out;
7204
7205                 cmd = smb2_set_flock_flags(flock, flags);
7206
7207                 lock_start = le64_to_cpu(lock_ele[i].Offset);
7208                 lock_length = le64_to_cpu(lock_ele[i].Length);
7209                 if (lock_start > U64_MAX - lock_length) {
7210                         pr_err("Invalid lock range requested\n");
7211                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7212                         locks_free_lock(flock);
7213                         goto out;
7214                 }
7215
7216                 if (lock_start > OFFSET_MAX)
7217                         flock->fl_start = OFFSET_MAX;
7218                 else
7219                         flock->fl_start = lock_start;
7220
7221                 lock_length = le64_to_cpu(lock_ele[i].Length);
7222                 if (lock_length > OFFSET_MAX - flock->fl_start)
7223                         lock_length = OFFSET_MAX - flock->fl_start;
7224
7225                 flock->fl_end = flock->fl_start + lock_length;
7226
7227                 if (flock->fl_end < flock->fl_start) {
7228                         ksmbd_debug(SMB,
7229                                     "the end offset(%llx) is smaller than the start offset(%llx)\n",
7230                                     flock->fl_end, flock->fl_start);
7231                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7232                         locks_free_lock(flock);
7233                         goto out;
7234                 }
7235
7236                 /* Check conflict locks in one request */
7237                 list_for_each_entry(cmp_lock, &lock_list, llist) {
7238                         if (cmp_lock->fl->fl_start <= flock->fl_start &&
7239                             cmp_lock->fl->fl_end >= flock->fl_end) {
7240                                 if (cmp_lock->fl->c.flc_type != F_UNLCK &&
7241                                     flock->c.flc_type != F_UNLCK) {
7242                                         pr_err("conflict two locks in one request\n");
7243                                         err = -EINVAL;
7244                                         locks_free_lock(flock);
7245                                         goto out;
7246                                 }
7247                         }
7248                 }
7249
7250                 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
7251                 if (!smb_lock) {
7252                         err = -EINVAL;
7253                         locks_free_lock(flock);
7254                         goto out;
7255                 }
7256         }
7257
7258         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7259                 if (smb_lock->cmd < 0) {
7260                         err = -EINVAL;
7261                         goto out;
7262                 }
7263
7264                 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
7265                         err = -EINVAL;
7266                         goto out;
7267                 }
7268
7269                 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
7270                      smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
7271                     (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
7272                      !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
7273                         err = -EINVAL;
7274                         goto out;
7275                 }
7276
7277                 prior_lock = smb_lock->flags;
7278
7279                 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
7280                     !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
7281                         goto no_check_cl;
7282
7283                 nolock = 1;
7284                 /* check locks in connection list */
7285                 down_read(&conn_list_lock);
7286                 list_for_each_entry(conn, &conn_list, conns_list) {
7287                         spin_lock(&conn->llist_lock);
7288                         list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
7289                                 if (file_inode(cmp_lock->fl->c.flc_file) !=
7290                                     file_inode(smb_lock->fl->c.flc_file))
7291                                         continue;
7292
7293                                 if (lock_is_unlock(smb_lock->fl)) {
7294                                         if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file &&
7295                                             cmp_lock->start == smb_lock->start &&
7296                                             cmp_lock->end == smb_lock->end &&
7297                                             !lock_defer_pending(cmp_lock->fl)) {
7298                                                 nolock = 0;
7299                                                 list_del(&cmp_lock->flist);
7300                                                 list_del(&cmp_lock->clist);
7301                                                 spin_unlock(&conn->llist_lock);
7302                                                 up_read(&conn_list_lock);
7303
7304                                                 locks_free_lock(cmp_lock->fl);
7305                                                 kfree(cmp_lock);
7306                                                 goto out_check_cl;
7307                                         }
7308                                         continue;
7309                                 }
7310
7311                                 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file) {
7312                                         if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
7313                                                 continue;
7314                                 } else {
7315                                         if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
7316                                                 continue;
7317                                 }
7318
7319                                 /* check zero byte lock range */
7320                                 if (cmp_lock->zero_len && !smb_lock->zero_len &&
7321                                     cmp_lock->start > smb_lock->start &&
7322                                     cmp_lock->start < smb_lock->end) {
7323                                         spin_unlock(&conn->llist_lock);
7324                                         up_read(&conn_list_lock);
7325                                         pr_err("previous lock conflict with zero byte lock range\n");
7326                                         goto out;
7327                                 }
7328
7329                                 if (smb_lock->zero_len && !cmp_lock->zero_len &&
7330                                     smb_lock->start > cmp_lock->start &&
7331                                     smb_lock->start < cmp_lock->end) {
7332                                         spin_unlock(&conn->llist_lock);
7333                                         up_read(&conn_list_lock);
7334                                         pr_err("current lock conflict with zero byte lock range\n");
7335                                         goto out;
7336                                 }
7337
7338                                 if (((cmp_lock->start <= smb_lock->start &&
7339                                       cmp_lock->end > smb_lock->start) ||
7340                                      (cmp_lock->start < smb_lock->end &&
7341                                       cmp_lock->end >= smb_lock->end)) &&
7342                                     !cmp_lock->zero_len && !smb_lock->zero_len) {
7343                                         spin_unlock(&conn->llist_lock);
7344                                         up_read(&conn_list_lock);
7345                                         pr_err("Not allow lock operation on exclusive lock range\n");
7346                                         goto out;
7347                                 }
7348                         }
7349                         spin_unlock(&conn->llist_lock);
7350                 }
7351                 up_read(&conn_list_lock);
7352 out_check_cl:
7353                 if (lock_is_unlock(smb_lock->fl) && nolock) {
7354                         pr_err("Try to unlock nolocked range\n");
7355                         rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7356                         goto out;
7357                 }
7358
7359 no_check_cl:
7360                 if (smb_lock->zero_len) {
7361                         err = 0;
7362                         goto skip;
7363                 }
7364
7365                 flock = smb_lock->fl;
7366                 list_del(&smb_lock->llist);
7367 retry:
7368                 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7369 skip:
7370                 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7371                         if (!rc) {
7372                                 ksmbd_debug(SMB, "File unlocked\n");
7373                         } else if (rc == -ENOENT) {
7374                                 rsp->hdr.Status = STATUS_NOT_LOCKED;
7375                                 goto out;
7376                         }
7377                         locks_free_lock(flock);
7378                         kfree(smb_lock);
7379                 } else {
7380                         if (rc == FILE_LOCK_DEFERRED) {
7381                                 void **argv;
7382
7383                                 ksmbd_debug(SMB,
7384                                             "would have to wait for getting lock\n");
7385                                 list_add(&smb_lock->llist, &rollback_list);
7386
7387                                 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7388                                 if (!argv) {
7389                                         err = -ENOMEM;
7390                                         goto out;
7391                                 }
7392                                 argv[0] = flock;
7393
7394                                 rc = setup_async_work(work,
7395                                                       smb2_remove_blocked_lock,
7396                                                       argv);
7397                                 if (rc) {
7398                                         kfree(argv);
7399                                         err = -ENOMEM;
7400                                         goto out;
7401                                 }
7402                                 spin_lock(&fp->f_lock);
7403                                 list_add(&work->fp_entry, &fp->blocked_works);
7404                                 spin_unlock(&fp->f_lock);
7405
7406                                 smb2_send_interim_resp(work, STATUS_PENDING);
7407
7408                                 ksmbd_vfs_posix_lock_wait(flock);
7409
7410                                 spin_lock(&fp->f_lock);
7411                                 list_del(&work->fp_entry);
7412                                 spin_unlock(&fp->f_lock);
7413
7414                                 if (work->state != KSMBD_WORK_ACTIVE) {
7415                                         list_del(&smb_lock->llist);
7416                                         locks_free_lock(flock);
7417
7418                                         if (work->state == KSMBD_WORK_CANCELLED) {
7419                                                 rsp->hdr.Status =
7420                                                         STATUS_CANCELLED;
7421                                                 kfree(smb_lock);
7422                                                 smb2_send_interim_resp(work,
7423                                                                        STATUS_CANCELLED);
7424                                                 work->send_no_response = 1;
7425                                                 goto out;
7426                                         }
7427
7428                                         rsp->hdr.Status =
7429                                                 STATUS_RANGE_NOT_LOCKED;
7430                                         kfree(smb_lock);
7431                                         goto out2;
7432                                 }
7433
7434                                 list_del(&smb_lock->llist);
7435                                 release_async_work(work);
7436                                 goto retry;
7437                         } else if (!rc) {
7438                                 list_add(&smb_lock->llist, &rollback_list);
7439                                 spin_lock(&work->conn->llist_lock);
7440                                 list_add_tail(&smb_lock->clist,
7441                                               &work->conn->lock_list);
7442                                 list_add_tail(&smb_lock->flist,
7443                                               &fp->lock_list);
7444                                 spin_unlock(&work->conn->llist_lock);
7445                                 ksmbd_debug(SMB, "successful in taking lock\n");
7446                         } else {
7447                                 goto out;
7448                         }
7449                 }
7450         }
7451
7452         if (atomic_read(&fp->f_ci->op_count) > 1)
7453                 smb_break_all_oplock(work, fp);
7454
7455         rsp->StructureSize = cpu_to_le16(4);
7456         ksmbd_debug(SMB, "successful in taking lock\n");
7457         rsp->hdr.Status = STATUS_SUCCESS;
7458         rsp->Reserved = 0;
7459         err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7460         if (err)
7461                 goto out;
7462
7463         ksmbd_fd_put(work, fp);
7464         return 0;
7465
7466 out:
7467         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7468                 locks_free_lock(smb_lock->fl);
7469                 list_del(&smb_lock->llist);
7470                 kfree(smb_lock);
7471         }
7472
7473         list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7474                 struct file_lock *rlock = NULL;
7475
7476                 rlock = smb_flock_init(filp);
7477                 rlock->c.flc_type = F_UNLCK;
7478                 rlock->fl_start = smb_lock->start;
7479                 rlock->fl_end = smb_lock->end;
7480
7481                 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7482                 if (rc)
7483                         pr_err("rollback unlock fail : %d\n", rc);
7484
7485                 list_del(&smb_lock->llist);
7486                 spin_lock(&work->conn->llist_lock);
7487                 if (!list_empty(&smb_lock->flist))
7488                         list_del(&smb_lock->flist);
7489                 list_del(&smb_lock->clist);
7490                 spin_unlock(&work->conn->llist_lock);
7491
7492                 locks_free_lock(smb_lock->fl);
7493                 locks_free_lock(rlock);
7494                 kfree(smb_lock);
7495         }
7496 out2:
7497         ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7498
7499         if (!rsp->hdr.Status) {
7500                 if (err == -EINVAL)
7501                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7502                 else if (err == -ENOMEM)
7503                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7504                 else if (err == -ENOENT)
7505                         rsp->hdr.Status = STATUS_FILE_CLOSED;
7506                 else
7507                         rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7508         }
7509
7510         smb2_set_err_rsp(work);
7511         ksmbd_fd_put(work, fp);
7512         return err;
7513 }
7514
7515 static int fsctl_copychunk(struct ksmbd_work *work,
7516                            struct copychunk_ioctl_req *ci_req,
7517                            unsigned int cnt_code,
7518                            unsigned int input_count,
7519                            unsigned long long volatile_id,
7520                            unsigned long long persistent_id,
7521                            struct smb2_ioctl_rsp *rsp)
7522 {
7523         struct copychunk_ioctl_rsp *ci_rsp;
7524         struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7525         struct srv_copychunk *chunks;
7526         unsigned int i, chunk_count, chunk_count_written = 0;
7527         unsigned int chunk_size_written = 0;
7528         loff_t total_size_written = 0;
7529         int ret = 0;
7530
7531         ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7532
7533         rsp->VolatileFileId = volatile_id;
7534         rsp->PersistentFileId = persistent_id;
7535         ci_rsp->ChunksWritten =
7536                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7537         ci_rsp->ChunkBytesWritten =
7538                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7539         ci_rsp->TotalBytesWritten =
7540                 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7541
7542         chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7543         chunk_count = le32_to_cpu(ci_req->ChunkCount);
7544         if (chunk_count == 0)
7545                 goto out;
7546         total_size_written = 0;
7547
7548         /* verify the SRV_COPYCHUNK_COPY packet */
7549         if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7550             input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7551              chunk_count * sizeof(struct srv_copychunk)) {
7552                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7553                 return -EINVAL;
7554         }
7555
7556         for (i = 0; i < chunk_count; i++) {
7557                 if (le32_to_cpu(chunks[i].Length) == 0 ||
7558                     le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7559                         break;
7560                 total_size_written += le32_to_cpu(chunks[i].Length);
7561         }
7562
7563         if (i < chunk_count ||
7564             total_size_written > ksmbd_server_side_copy_max_total_size()) {
7565                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7566                 return -EINVAL;
7567         }
7568
7569         src_fp = ksmbd_lookup_foreign_fd(work,
7570                                          le64_to_cpu(ci_req->ResumeKey[0]));
7571         dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7572         ret = -EINVAL;
7573         if (!src_fp ||
7574             src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7575                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7576                 goto out;
7577         }
7578
7579         if (!dst_fp) {
7580                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7581                 goto out;
7582         }
7583
7584         /*
7585          * FILE_READ_DATA should only be included in
7586          * the FSCTL_COPYCHUNK case
7587          */
7588         if (cnt_code == FSCTL_COPYCHUNK &&
7589             !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7590                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7591                 goto out;
7592         }
7593
7594         ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7595                                          chunks, chunk_count,
7596                                          &chunk_count_written,
7597                                          &chunk_size_written,
7598                                          &total_size_written);
7599         if (ret < 0) {
7600                 if (ret == -EACCES)
7601                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
7602                 if (ret == -EAGAIN)
7603                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7604                 else if (ret == -EBADF)
7605                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
7606                 else if (ret == -EFBIG || ret == -ENOSPC)
7607                         rsp->hdr.Status = STATUS_DISK_FULL;
7608                 else if (ret == -EINVAL)
7609                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7610                 else if (ret == -EISDIR)
7611                         rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7612                 else if (ret == -E2BIG)
7613                         rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7614                 else
7615                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7616         }
7617
7618         ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7619         ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7620         ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7621 out:
7622         ksmbd_fd_put(work, src_fp);
7623         ksmbd_fd_put(work, dst_fp);
7624         return ret;
7625 }
7626
7627 static __be32 idev_ipv4_address(struct in_device *idev)
7628 {
7629         __be32 addr = 0;
7630
7631         struct in_ifaddr *ifa;
7632
7633         rcu_read_lock();
7634         in_dev_for_each_ifa_rcu(ifa, idev) {
7635                 if (ifa->ifa_flags & IFA_F_SECONDARY)
7636                         continue;
7637
7638                 addr = ifa->ifa_address;
7639                 break;
7640         }
7641         rcu_read_unlock();
7642         return addr;
7643 }
7644
7645 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7646                                         struct smb2_ioctl_rsp *rsp,
7647                                         unsigned int out_buf_len)
7648 {
7649         struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7650         int nbytes = 0;
7651         struct net_device *netdev;
7652         struct sockaddr_storage_rsp *sockaddr_storage;
7653         unsigned int flags;
7654         unsigned long long speed;
7655
7656         rtnl_lock();
7657         for_each_netdev(&init_net, netdev) {
7658                 bool ipv4_set = false;
7659
7660                 if (netdev->type == ARPHRD_LOOPBACK)
7661                         continue;
7662
7663                 flags = dev_get_flags(netdev);
7664                 if (!(flags & IFF_RUNNING))
7665                         continue;
7666 ipv6_retry:
7667                 if (out_buf_len <
7668                     nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7669                         rtnl_unlock();
7670                         return -ENOSPC;
7671                 }
7672
7673                 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7674                                 &rsp->Buffer[nbytes];
7675                 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7676
7677                 nii_rsp->Capability = 0;
7678                 if (netdev->real_num_tx_queues > 1)
7679                         nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7680                 if (ksmbd_rdma_capable_netdev(netdev))
7681                         nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7682
7683                 nii_rsp->Next = cpu_to_le32(152);
7684                 nii_rsp->Reserved = 0;
7685
7686                 if (netdev->ethtool_ops->get_link_ksettings) {
7687                         struct ethtool_link_ksettings cmd;
7688
7689                         netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7690                         speed = cmd.base.speed;
7691                 } else {
7692                         ksmbd_debug(SMB, "%s %s\n", netdev->name,
7693                                     "speed is unknown, defaulting to 1Gb/sec");
7694                         speed = SPEED_1000;
7695                 }
7696
7697                 speed *= 1000000;
7698                 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7699
7700                 sockaddr_storage = (struct sockaddr_storage_rsp *)
7701                                         nii_rsp->SockAddr_Storage;
7702                 memset(sockaddr_storage, 0, 128);
7703
7704                 if (!ipv4_set) {
7705                         struct in_device *idev;
7706
7707                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7708                         sockaddr_storage->addr4.Port = 0;
7709
7710                         idev = __in_dev_get_rtnl(netdev);
7711                         if (!idev)
7712                                 continue;
7713                         sockaddr_storage->addr4.IPv4address =
7714                                                 idev_ipv4_address(idev);
7715                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7716                         ipv4_set = true;
7717                         goto ipv6_retry;
7718                 } else {
7719                         struct inet6_dev *idev6;
7720                         struct inet6_ifaddr *ifa;
7721                         __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7722
7723                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7724                         sockaddr_storage->addr6.Port = 0;
7725                         sockaddr_storage->addr6.FlowInfo = 0;
7726
7727                         idev6 = __in6_dev_get(netdev);
7728                         if (!idev6)
7729                                 continue;
7730
7731                         list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7732                                 if (ifa->flags & (IFA_F_TENTATIVE |
7733                                                         IFA_F_DEPRECATED))
7734                                         continue;
7735                                 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7736                                 break;
7737                         }
7738                         sockaddr_storage->addr6.ScopeId = 0;
7739                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7740                 }
7741         }
7742         rtnl_unlock();
7743
7744         /* zero if this is last one */
7745         if (nii_rsp)
7746                 nii_rsp->Next = 0;
7747
7748         rsp->PersistentFileId = SMB2_NO_FID;
7749         rsp->VolatileFileId = SMB2_NO_FID;
7750         return nbytes;
7751 }
7752
7753 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7754                                          struct validate_negotiate_info_req *neg_req,
7755                                          struct validate_negotiate_info_rsp *neg_rsp,
7756                                          unsigned int in_buf_len)
7757 {
7758         int ret = 0;
7759         int dialect;
7760
7761         if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7762                         le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7763                 return -EINVAL;
7764
7765         dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7766                                              neg_req->DialectCount);
7767         if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7768                 ret = -EINVAL;
7769                 goto err_out;
7770         }
7771
7772         if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7773                 ret = -EINVAL;
7774                 goto err_out;
7775         }
7776
7777         if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7778                 ret = -EINVAL;
7779                 goto err_out;
7780         }
7781
7782         if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7783                 ret = -EINVAL;
7784                 goto err_out;
7785         }
7786
7787         neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7788         memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7789         neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7790         neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7791 err_out:
7792         return ret;
7793 }
7794
7795 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7796                                         struct file_allocated_range_buffer *qar_req,
7797                                         struct file_allocated_range_buffer *qar_rsp,
7798                                         unsigned int in_count, unsigned int *out_count)
7799 {
7800         struct ksmbd_file *fp;
7801         loff_t start, length;
7802         int ret = 0;
7803
7804         *out_count = 0;
7805         if (in_count == 0)
7806                 return -EINVAL;
7807
7808         start = le64_to_cpu(qar_req->file_offset);
7809         length = le64_to_cpu(qar_req->length);
7810
7811         if (start < 0 || length < 0)
7812                 return -EINVAL;
7813
7814         fp = ksmbd_lookup_fd_fast(work, id);
7815         if (!fp)
7816                 return -ENOENT;
7817
7818         ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7819                                    qar_rsp, in_count, out_count);
7820         if (ret && ret != -E2BIG)
7821                 *out_count = 0;
7822
7823         ksmbd_fd_put(work, fp);
7824         return ret;
7825 }
7826
7827 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7828                                  unsigned int out_buf_len,
7829                                  struct smb2_ioctl_req *req,
7830                                  struct smb2_ioctl_rsp *rsp)
7831 {
7832         struct ksmbd_rpc_command *rpc_resp;
7833         char *data_buf = (char *)req + le32_to_cpu(req->InputOffset);
7834         int nbytes = 0;
7835
7836         rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7837                                    le32_to_cpu(req->InputCount));
7838         if (rpc_resp) {
7839                 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7840                         /*
7841                          * set STATUS_SOME_NOT_MAPPED response
7842                          * for unknown domain sid.
7843                          */
7844                         rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7845                 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7846                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7847                         goto out;
7848                 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7849                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7850                         goto out;
7851                 }
7852
7853                 nbytes = rpc_resp->payload_sz;
7854                 if (rpc_resp->payload_sz > out_buf_len) {
7855                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7856                         nbytes = out_buf_len;
7857                 }
7858
7859                 if (!rpc_resp->payload_sz) {
7860                         rsp->hdr.Status =
7861                                 STATUS_UNEXPECTED_IO_ERROR;
7862                         goto out;
7863                 }
7864
7865                 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7866         }
7867 out:
7868         kvfree(rpc_resp);
7869         return nbytes;
7870 }
7871
7872 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7873                                    struct file_sparse *sparse)
7874 {
7875         struct ksmbd_file *fp;
7876         struct mnt_idmap *idmap;
7877         int ret = 0;
7878         __le32 old_fattr;
7879
7880         fp = ksmbd_lookup_fd_fast(work, id);
7881         if (!fp)
7882                 return -ENOENT;
7883         idmap = file_mnt_idmap(fp->filp);
7884
7885         old_fattr = fp->f_ci->m_fattr;
7886         if (sparse->SetSparse)
7887                 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7888         else
7889                 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7890
7891         if (fp->f_ci->m_fattr != old_fattr &&
7892             test_share_config_flag(work->tcon->share_conf,
7893                                    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7894                 struct xattr_dos_attrib da;
7895
7896                 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
7897                                                      fp->filp->f_path.dentry, &da);
7898                 if (ret <= 0)
7899                         goto out;
7900
7901                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7902                 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
7903                                                      &fp->filp->f_path,
7904                                                      &da, true);
7905                 if (ret)
7906                         fp->f_ci->m_fattr = old_fattr;
7907         }
7908
7909 out:
7910         ksmbd_fd_put(work, fp);
7911         return ret;
7912 }
7913
7914 static int fsctl_request_resume_key(struct ksmbd_work *work,
7915                                     struct smb2_ioctl_req *req,
7916                                     struct resume_key_ioctl_rsp *key_rsp)
7917 {
7918         struct ksmbd_file *fp;
7919
7920         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7921         if (!fp)
7922                 return -ENOENT;
7923
7924         memset(key_rsp, 0, sizeof(*key_rsp));
7925         key_rsp->ResumeKey[0] = req->VolatileFileId;
7926         key_rsp->ResumeKey[1] = req->PersistentFileId;
7927         ksmbd_fd_put(work, fp);
7928
7929         return 0;
7930 }
7931
7932 /**
7933  * smb2_ioctl() - handler for smb2 ioctl command
7934  * @work:       smb work containing ioctl command buffer
7935  *
7936  * Return:      0 on success, otherwise error
7937  */
7938 int smb2_ioctl(struct ksmbd_work *work)
7939 {
7940         struct smb2_ioctl_req *req;
7941         struct smb2_ioctl_rsp *rsp;
7942         unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7943         u64 id = KSMBD_NO_FID;
7944         struct ksmbd_conn *conn = work->conn;
7945         int ret = 0;
7946         char *buffer;
7947
7948         if (work->next_smb2_rcv_hdr_off) {
7949                 req = ksmbd_req_buf_next(work);
7950                 rsp = ksmbd_resp_buf_next(work);
7951                 if (!has_file_id(req->VolatileFileId)) {
7952                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7953                                     work->compound_fid);
7954                         id = work->compound_fid;
7955                 }
7956         } else {
7957                 req = smb2_get_msg(work->request_buf);
7958                 rsp = smb2_get_msg(work->response_buf);
7959         }
7960
7961         if (!has_file_id(id))
7962                 id = req->VolatileFileId;
7963
7964         if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7965                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7966                 goto out;
7967         }
7968
7969         buffer = (char *)req + le32_to_cpu(req->InputOffset);
7970
7971         cnt_code = le32_to_cpu(req->CtlCode);
7972         ret = smb2_calc_max_out_buf_len(work, 48,
7973                                         le32_to_cpu(req->MaxOutputResponse));
7974         if (ret < 0) {
7975                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7976                 goto out;
7977         }
7978         out_buf_len = (unsigned int)ret;
7979         in_buf_len = le32_to_cpu(req->InputCount);
7980
7981         switch (cnt_code) {
7982         case FSCTL_DFS_GET_REFERRALS:
7983         case FSCTL_DFS_GET_REFERRALS_EX:
7984                 /* Not support DFS yet */
7985                 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7986                 goto out;
7987         case FSCTL_CREATE_OR_GET_OBJECT_ID:
7988         {
7989                 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7990
7991                 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7992                 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7993                         &rsp->Buffer[0];
7994
7995                 /*
7996                  * TODO: This is dummy implementation to pass smbtorture
7997                  * Need to check correct response later
7998                  */
7999                 memset(obj_buf->ObjectId, 0x0, 16);
8000                 memset(obj_buf->BirthVolumeId, 0x0, 16);
8001                 memset(obj_buf->BirthObjectId, 0x0, 16);
8002                 memset(obj_buf->DomainId, 0x0, 16);
8003
8004                 break;
8005         }
8006         case FSCTL_PIPE_TRANSCEIVE:
8007                 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
8008                 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
8009                 break;
8010         case FSCTL_VALIDATE_NEGOTIATE_INFO:
8011                 if (conn->dialect < SMB30_PROT_ID) {
8012                         ret = -EOPNOTSUPP;
8013                         goto out;
8014                 }
8015
8016                 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
8017                                           Dialects)) {
8018                         ret = -EINVAL;
8019                         goto out;
8020                 }
8021
8022                 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
8023                         ret = -EINVAL;
8024                         goto out;
8025                 }
8026
8027                 ret = fsctl_validate_negotiate_info(conn,
8028                         (struct validate_negotiate_info_req *)buffer,
8029                         (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
8030                         in_buf_len);
8031                 if (ret < 0)
8032                         goto out;
8033
8034                 nbytes = sizeof(struct validate_negotiate_info_rsp);
8035                 rsp->PersistentFileId = SMB2_NO_FID;
8036                 rsp->VolatileFileId = SMB2_NO_FID;
8037                 break;
8038         case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
8039                 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
8040                 if (ret < 0)
8041                         goto out;
8042                 nbytes = ret;
8043                 break;
8044         case FSCTL_REQUEST_RESUME_KEY:
8045                 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
8046                         ret = -EINVAL;
8047                         goto out;
8048                 }
8049
8050                 ret = fsctl_request_resume_key(work, req,
8051                                                (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
8052                 if (ret < 0)
8053                         goto out;
8054                 rsp->PersistentFileId = req->PersistentFileId;
8055                 rsp->VolatileFileId = req->VolatileFileId;
8056                 nbytes = sizeof(struct resume_key_ioctl_rsp);
8057                 break;
8058         case FSCTL_COPYCHUNK:
8059         case FSCTL_COPYCHUNK_WRITE:
8060                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8061                         ksmbd_debug(SMB,
8062                                     "User does not have write permission\n");
8063                         ret = -EACCES;
8064                         goto out;
8065                 }
8066
8067                 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
8068                         ret = -EINVAL;
8069                         goto out;
8070                 }
8071
8072                 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
8073                         ret = -EINVAL;
8074                         goto out;
8075                 }
8076
8077                 nbytes = sizeof(struct copychunk_ioctl_rsp);
8078                 rsp->VolatileFileId = req->VolatileFileId;
8079                 rsp->PersistentFileId = req->PersistentFileId;
8080                 fsctl_copychunk(work,
8081                                 (struct copychunk_ioctl_req *)buffer,
8082                                 le32_to_cpu(req->CtlCode),
8083                                 le32_to_cpu(req->InputCount),
8084                                 req->VolatileFileId,
8085                                 req->PersistentFileId,
8086                                 rsp);
8087                 break;
8088         case FSCTL_SET_SPARSE:
8089                 if (in_buf_len < sizeof(struct file_sparse)) {
8090                         ret = -EINVAL;
8091                         goto out;
8092                 }
8093
8094                 ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer);
8095                 if (ret < 0)
8096                         goto out;
8097                 break;
8098         case FSCTL_SET_ZERO_DATA:
8099         {
8100                 struct file_zero_data_information *zero_data;
8101                 struct ksmbd_file *fp;
8102                 loff_t off, len, bfz;
8103
8104                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8105                         ksmbd_debug(SMB,
8106                                     "User does not have write permission\n");
8107                         ret = -EACCES;
8108                         goto out;
8109                 }
8110
8111                 if (in_buf_len < sizeof(struct file_zero_data_information)) {
8112                         ret = -EINVAL;
8113                         goto out;
8114                 }
8115
8116                 zero_data =
8117                         (struct file_zero_data_information *)buffer;
8118
8119                 off = le64_to_cpu(zero_data->FileOffset);
8120                 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
8121                 if (off < 0 || bfz < 0 || off > bfz) {
8122                         ret = -EINVAL;
8123                         goto out;
8124                 }
8125
8126                 len = bfz - off;
8127                 if (len) {
8128                         fp = ksmbd_lookup_fd_fast(work, id);
8129                         if (!fp) {
8130                                 ret = -ENOENT;
8131                                 goto out;
8132                         }
8133
8134                         ret = ksmbd_vfs_zero_data(work, fp, off, len);
8135                         ksmbd_fd_put(work, fp);
8136                         if (ret < 0)
8137                                 goto out;
8138                 }
8139                 break;
8140         }
8141         case FSCTL_QUERY_ALLOCATED_RANGES:
8142                 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
8143                         ret = -EINVAL;
8144                         goto out;
8145                 }
8146
8147                 ret = fsctl_query_allocated_ranges(work, id,
8148                         (struct file_allocated_range_buffer *)buffer,
8149                         (struct file_allocated_range_buffer *)&rsp->Buffer[0],
8150                         out_buf_len /
8151                         sizeof(struct file_allocated_range_buffer), &nbytes);
8152                 if (ret == -E2BIG) {
8153                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
8154                 } else if (ret < 0) {
8155                         nbytes = 0;
8156                         goto out;
8157                 }
8158
8159                 nbytes *= sizeof(struct file_allocated_range_buffer);
8160                 break;
8161         case FSCTL_GET_REPARSE_POINT:
8162         {
8163                 struct reparse_data_buffer *reparse_ptr;
8164                 struct ksmbd_file *fp;
8165
8166                 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
8167                 fp = ksmbd_lookup_fd_fast(work, id);
8168                 if (!fp) {
8169                         pr_err("not found fp!!\n");
8170                         ret = -ENOENT;
8171                         goto out;
8172                 }
8173
8174                 reparse_ptr->ReparseTag =
8175                         smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
8176                 reparse_ptr->ReparseDataLength = 0;
8177                 ksmbd_fd_put(work, fp);
8178                 nbytes = sizeof(struct reparse_data_buffer);
8179                 break;
8180         }
8181         case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
8182         {
8183                 struct ksmbd_file *fp_in, *fp_out = NULL;
8184                 struct duplicate_extents_to_file *dup_ext;
8185                 loff_t src_off, dst_off, length, cloned;
8186
8187                 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
8188                         ret = -EINVAL;
8189                         goto out;
8190                 }
8191
8192                 dup_ext = (struct duplicate_extents_to_file *)buffer;
8193
8194                 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
8195                                              dup_ext->PersistentFileHandle);
8196                 if (!fp_in) {
8197                         pr_err("not found file handle in duplicate extent to file\n");
8198                         ret = -ENOENT;
8199                         goto out;
8200                 }
8201
8202                 fp_out = ksmbd_lookup_fd_fast(work, id);
8203                 if (!fp_out) {
8204                         pr_err("not found fp\n");
8205                         ret = -ENOENT;
8206                         goto dup_ext_out;
8207                 }
8208
8209                 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
8210                 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
8211                 length = le64_to_cpu(dup_ext->ByteCount);
8212                 /*
8213                  * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
8214                  * should fall back to vfs_copy_file_range().  This could be
8215                  * beneficial when re-exporting nfs/smb mount, but note that
8216                  * this can result in partial copy that returns an error status.
8217                  * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
8218                  * fall back to vfs_copy_file_range(), should be avoided when
8219                  * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
8220                  */
8221                 cloned = vfs_clone_file_range(fp_in->filp, src_off,
8222                                               fp_out->filp, dst_off, length, 0);
8223                 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
8224                         ret = -EOPNOTSUPP;
8225                         goto dup_ext_out;
8226                 } else if (cloned != length) {
8227                         cloned = vfs_copy_file_range(fp_in->filp, src_off,
8228                                                      fp_out->filp, dst_off,
8229                                                      length, 0);
8230                         if (cloned != length) {
8231                                 if (cloned < 0)
8232                                         ret = cloned;
8233                                 else
8234                                         ret = -EINVAL;
8235                         }
8236                 }
8237
8238 dup_ext_out:
8239                 ksmbd_fd_put(work, fp_in);
8240                 ksmbd_fd_put(work, fp_out);
8241                 if (ret < 0)
8242                         goto out;
8243                 break;
8244         }
8245         default:
8246                 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
8247                             cnt_code);
8248                 ret = -EOPNOTSUPP;
8249                 goto out;
8250         }
8251
8252         rsp->CtlCode = cpu_to_le32(cnt_code);
8253         rsp->InputCount = cpu_to_le32(0);
8254         rsp->InputOffset = cpu_to_le32(112);
8255         rsp->OutputOffset = cpu_to_le32(112);
8256         rsp->OutputCount = cpu_to_le32(nbytes);
8257         rsp->StructureSize = cpu_to_le16(49);
8258         rsp->Reserved = cpu_to_le16(0);
8259         rsp->Flags = cpu_to_le32(0);
8260         rsp->Reserved2 = cpu_to_le32(0);
8261         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
8262         if (!ret)
8263                 return ret;
8264
8265 out:
8266         if (ret == -EACCES)
8267                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
8268         else if (ret == -ENOENT)
8269                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
8270         else if (ret == -EOPNOTSUPP)
8271                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
8272         else if (ret == -ENOSPC)
8273                 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
8274         else if (ret < 0 || rsp->hdr.Status == 0)
8275                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8276         smb2_set_err_rsp(work);
8277         return 0;
8278 }
8279
8280 /**
8281  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
8282  * @work:       smb work containing oplock break command buffer
8283  *
8284  * Return:      0
8285  */
8286 static void smb20_oplock_break_ack(struct ksmbd_work *work)
8287 {
8288         struct smb2_oplock_break *req;
8289         struct smb2_oplock_break *rsp;
8290         struct ksmbd_file *fp;
8291         struct oplock_info *opinfo = NULL;
8292         __le32 err = 0;
8293         int ret = 0;
8294         u64 volatile_id, persistent_id;
8295         char req_oplevel = 0, rsp_oplevel = 0;
8296         unsigned int oplock_change_type;
8297
8298         WORK_BUFFERS(work, req, rsp);
8299
8300         volatile_id = req->VolatileFid;
8301         persistent_id = req->PersistentFid;
8302         req_oplevel = req->OplockLevel;
8303         ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
8304                     volatile_id, persistent_id, req_oplevel);
8305
8306         fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
8307         if (!fp) {
8308                 rsp->hdr.Status = STATUS_FILE_CLOSED;
8309                 smb2_set_err_rsp(work);
8310                 return;
8311         }
8312
8313         opinfo = opinfo_get(fp);
8314         if (!opinfo) {
8315                 pr_err("unexpected null oplock_info\n");
8316                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8317                 smb2_set_err_rsp(work);
8318                 ksmbd_fd_put(work, fp);
8319                 return;
8320         }
8321
8322         if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8323                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8324                 goto err_out;
8325         }
8326
8327         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8328                 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8329                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8330                 goto err_out;
8331         }
8332
8333         if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8334              opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8335             (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8336              req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8337                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8338                 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8339         } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8340                    req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8341                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8342                 oplock_change_type = OPLOCK_READ_TO_NONE;
8343         } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8344                    req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8345                 err = STATUS_INVALID_DEVICE_STATE;
8346                 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8347                      opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8348                     req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8349                         oplock_change_type = OPLOCK_WRITE_TO_READ;
8350                 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8351                             opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8352                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8353                         oplock_change_type = OPLOCK_WRITE_TO_NONE;
8354                 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8355                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8356                         oplock_change_type = OPLOCK_READ_TO_NONE;
8357                 } else {
8358                         oplock_change_type = 0;
8359                 }
8360         } else {
8361                 oplock_change_type = 0;
8362         }
8363
8364         switch (oplock_change_type) {
8365         case OPLOCK_WRITE_TO_READ:
8366                 ret = opinfo_write_to_read(opinfo);
8367                 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8368                 break;
8369         case OPLOCK_WRITE_TO_NONE:
8370                 ret = opinfo_write_to_none(opinfo);
8371                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8372                 break;
8373         case OPLOCK_READ_TO_NONE:
8374                 ret = opinfo_read_to_none(opinfo);
8375                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8376                 break;
8377         default:
8378                 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8379                        opinfo->level, rsp_oplevel);
8380         }
8381
8382         if (ret < 0) {
8383                 rsp->hdr.Status = err;
8384                 goto err_out;
8385         }
8386
8387         opinfo->op_state = OPLOCK_STATE_NONE;
8388         wake_up_interruptible_all(&opinfo->oplock_q);
8389         opinfo_put(opinfo);
8390         ksmbd_fd_put(work, fp);
8391
8392         rsp->StructureSize = cpu_to_le16(24);
8393         rsp->OplockLevel = rsp_oplevel;
8394         rsp->Reserved = 0;
8395         rsp->Reserved2 = 0;
8396         rsp->VolatileFid = volatile_id;
8397         rsp->PersistentFid = persistent_id;
8398         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8399         if (!ret)
8400                 return;
8401
8402 err_out:
8403         opinfo->op_state = OPLOCK_STATE_NONE;
8404         wake_up_interruptible_all(&opinfo->oplock_q);
8405
8406         opinfo_put(opinfo);
8407         ksmbd_fd_put(work, fp);
8408         smb2_set_err_rsp(work);
8409 }
8410
8411 static int check_lease_state(struct lease *lease, __le32 req_state)
8412 {
8413         if ((lease->new_state ==
8414              (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8415             !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8416                 lease->new_state = req_state;
8417                 return 0;
8418         }
8419
8420         if (lease->new_state == req_state)
8421                 return 0;
8422
8423         return 1;
8424 }
8425
8426 /**
8427  * smb21_lease_break_ack() - handler for smb2.1 lease break command
8428  * @work:       smb work containing lease break command buffer
8429  *
8430  * Return:      0
8431  */
8432 static void smb21_lease_break_ack(struct ksmbd_work *work)
8433 {
8434         struct ksmbd_conn *conn = work->conn;
8435         struct smb2_lease_ack *req;
8436         struct smb2_lease_ack *rsp;
8437         struct oplock_info *opinfo;
8438         __le32 err = 0;
8439         int ret = 0;
8440         unsigned int lease_change_type;
8441         __le32 lease_state;
8442         struct lease *lease;
8443
8444         WORK_BUFFERS(work, req, rsp);
8445
8446         ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8447                     le32_to_cpu(req->LeaseState));
8448         opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8449         if (!opinfo) {
8450                 ksmbd_debug(OPLOCK, "file not opened\n");
8451                 smb2_set_err_rsp(work);
8452                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8453                 return;
8454         }
8455         lease = opinfo->o_lease;
8456
8457         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8458                 pr_err("unexpected lease break state 0x%x\n",
8459                        opinfo->op_state);
8460                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8461                 goto err_out;
8462         }
8463
8464         if (check_lease_state(lease, req->LeaseState)) {
8465                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8466                 ksmbd_debug(OPLOCK,
8467                             "req lease state: 0x%x, expected state: 0x%x\n",
8468                             req->LeaseState, lease->new_state);
8469                 goto err_out;
8470         }
8471
8472         if (!atomic_read(&opinfo->breaking_cnt)) {
8473                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8474                 goto err_out;
8475         }
8476
8477         /* check for bad lease state */
8478         if (req->LeaseState &
8479             (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8480                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8481                 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8482                         lease_change_type = OPLOCK_WRITE_TO_NONE;
8483                 else
8484                         lease_change_type = OPLOCK_READ_TO_NONE;
8485                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8486                             le32_to_cpu(lease->state),
8487                             le32_to_cpu(req->LeaseState));
8488         } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8489                    req->LeaseState != SMB2_LEASE_NONE_LE) {
8490                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8491                 lease_change_type = OPLOCK_READ_TO_NONE;
8492                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8493                             le32_to_cpu(lease->state),
8494                             le32_to_cpu(req->LeaseState));
8495         } else {
8496                 /* valid lease state changes */
8497                 err = STATUS_INVALID_DEVICE_STATE;
8498                 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8499                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8500                                 lease_change_type = OPLOCK_WRITE_TO_NONE;
8501                         else
8502                                 lease_change_type = OPLOCK_READ_TO_NONE;
8503                 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8504                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8505                                 lease_change_type = OPLOCK_WRITE_TO_READ;
8506                         else
8507                                 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8508                 } else {
8509                         lease_change_type = 0;
8510                 }
8511         }
8512
8513         switch (lease_change_type) {
8514         case OPLOCK_WRITE_TO_READ:
8515                 ret = opinfo_write_to_read(opinfo);
8516                 break;
8517         case OPLOCK_READ_HANDLE_TO_READ:
8518                 ret = opinfo_read_handle_to_read(opinfo);
8519                 break;
8520         case OPLOCK_WRITE_TO_NONE:
8521                 ret = opinfo_write_to_none(opinfo);
8522                 break;
8523         case OPLOCK_READ_TO_NONE:
8524                 ret = opinfo_read_to_none(opinfo);
8525                 break;
8526         default:
8527                 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8528                             le32_to_cpu(lease->state),
8529                             le32_to_cpu(req->LeaseState));
8530         }
8531
8532         if (ret < 0) {
8533                 rsp->hdr.Status = err;
8534                 goto err_out;
8535         }
8536
8537         lease_state = lease->state;
8538         opinfo->op_state = OPLOCK_STATE_NONE;
8539         wake_up_interruptible_all(&opinfo->oplock_q);
8540         atomic_dec(&opinfo->breaking_cnt);
8541         wake_up_interruptible_all(&opinfo->oplock_brk);
8542         opinfo_put(opinfo);
8543
8544         rsp->StructureSize = cpu_to_le16(36);
8545         rsp->Reserved = 0;
8546         rsp->Flags = 0;
8547         memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8548         rsp->LeaseState = lease_state;
8549         rsp->LeaseDuration = 0;
8550         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8551         if (!ret)
8552                 return;
8553
8554 err_out:
8555         wake_up_interruptible_all(&opinfo->oplock_q);
8556         atomic_dec(&opinfo->breaking_cnt);
8557         wake_up_interruptible_all(&opinfo->oplock_brk);
8558
8559         opinfo_put(opinfo);
8560         smb2_set_err_rsp(work);
8561 }
8562
8563 /**
8564  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8565  * @work:       smb work containing oplock/lease break command buffer
8566  *
8567  * Return:      0
8568  */
8569 int smb2_oplock_break(struct ksmbd_work *work)
8570 {
8571         struct smb2_oplock_break *req;
8572         struct smb2_oplock_break *rsp;
8573
8574         WORK_BUFFERS(work, req, rsp);
8575
8576         switch (le16_to_cpu(req->StructureSize)) {
8577         case OP_BREAK_STRUCT_SIZE_20:
8578                 smb20_oplock_break_ack(work);
8579                 break;
8580         case OP_BREAK_STRUCT_SIZE_21:
8581                 smb21_lease_break_ack(work);
8582                 break;
8583         default:
8584                 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8585                             le16_to_cpu(req->StructureSize));
8586                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8587                 smb2_set_err_rsp(work);
8588         }
8589
8590         return 0;
8591 }
8592
8593 /**
8594  * smb2_notify() - handler for smb2 notify request
8595  * @work:   smb work containing notify command buffer
8596  *
8597  * Return:      0
8598  */
8599 int smb2_notify(struct ksmbd_work *work)
8600 {
8601         struct smb2_change_notify_req *req;
8602         struct smb2_change_notify_rsp *rsp;
8603
8604         WORK_BUFFERS(work, req, rsp);
8605
8606         if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8607                 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8608                 smb2_set_err_rsp(work);
8609                 return 0;
8610         }
8611
8612         smb2_set_err_rsp(work);
8613         rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8614         return 0;
8615 }
8616
8617 /**
8618  * smb2_is_sign_req() - handler for checking packet signing status
8619  * @work:       smb work containing notify command buffer
8620  * @command:    SMB2 command id
8621  *
8622  * Return:      true if packed is signed, false otherwise
8623  */
8624 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8625 {
8626         struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8627
8628         if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8629             command != SMB2_NEGOTIATE_HE &&
8630             command != SMB2_SESSION_SETUP_HE &&
8631             command != SMB2_OPLOCK_BREAK_HE)
8632                 return true;
8633
8634         return false;
8635 }
8636
8637 /**
8638  * smb2_check_sign_req() - handler for req packet sign processing
8639  * @work:   smb work containing notify command buffer
8640  *
8641  * Return:      1 on success, 0 otherwise
8642  */
8643 int smb2_check_sign_req(struct ksmbd_work *work)
8644 {
8645         struct smb2_hdr *hdr;
8646         char signature_req[SMB2_SIGNATURE_SIZE];
8647         char signature[SMB2_HMACSHA256_SIZE];
8648         struct kvec iov[1];
8649         size_t len;
8650
8651         hdr = smb2_get_msg(work->request_buf);
8652         if (work->next_smb2_rcv_hdr_off)
8653                 hdr = ksmbd_req_buf_next(work);
8654
8655         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8656                 len = get_rfc1002_len(work->request_buf);
8657         else if (hdr->NextCommand)
8658                 len = le32_to_cpu(hdr->NextCommand);
8659         else
8660                 len = get_rfc1002_len(work->request_buf) -
8661                         work->next_smb2_rcv_hdr_off;
8662
8663         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8664         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8665
8666         iov[0].iov_base = (char *)&hdr->ProtocolId;
8667         iov[0].iov_len = len;
8668
8669         if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8670                                 signature))
8671                 return 0;
8672
8673         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8674                 pr_err("bad smb2 signature\n");
8675                 return 0;
8676         }
8677
8678         return 1;
8679 }
8680
8681 /**
8682  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8683  * @work:   smb work containing notify command buffer
8684  *
8685  */
8686 void smb2_set_sign_rsp(struct ksmbd_work *work)
8687 {
8688         struct smb2_hdr *hdr;
8689         char signature[SMB2_HMACSHA256_SIZE];
8690         struct kvec *iov;
8691         int n_vec = 1;
8692
8693         hdr = ksmbd_resp_buf_curr(work);
8694         hdr->Flags |= SMB2_FLAGS_SIGNED;
8695         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8696
8697         if (hdr->Command == SMB2_READ) {
8698                 iov = &work->iov[work->iov_idx - 1];
8699                 n_vec++;
8700         } else {
8701                 iov = &work->iov[work->iov_idx];
8702         }
8703
8704         if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8705                                  signature))
8706                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8707 }
8708
8709 /**
8710  * smb3_check_sign_req() - handler for req packet sign processing
8711  * @work:   smb work containing notify command buffer
8712  *
8713  * Return:      1 on success, 0 otherwise
8714  */
8715 int smb3_check_sign_req(struct ksmbd_work *work)
8716 {
8717         struct ksmbd_conn *conn = work->conn;
8718         char *signing_key;
8719         struct smb2_hdr *hdr;
8720         struct channel *chann;
8721         char signature_req[SMB2_SIGNATURE_SIZE];
8722         char signature[SMB2_CMACAES_SIZE];
8723         struct kvec iov[1];
8724         size_t len;
8725
8726         hdr = smb2_get_msg(work->request_buf);
8727         if (work->next_smb2_rcv_hdr_off)
8728                 hdr = ksmbd_req_buf_next(work);
8729
8730         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8731                 len = get_rfc1002_len(work->request_buf);
8732         else if (hdr->NextCommand)
8733                 len = le32_to_cpu(hdr->NextCommand);
8734         else
8735                 len = get_rfc1002_len(work->request_buf) -
8736                         work->next_smb2_rcv_hdr_off;
8737
8738         if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8739                 signing_key = work->sess->smb3signingkey;
8740         } else {
8741                 chann = lookup_chann_list(work->sess, conn);
8742                 if (!chann) {
8743                         return 0;
8744                 }
8745                 signing_key = chann->smb3signingkey;
8746         }
8747
8748         if (!signing_key) {
8749                 pr_err("SMB3 signing key is not generated\n");
8750                 return 0;
8751         }
8752
8753         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8754         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8755         iov[0].iov_base = (char *)&hdr->ProtocolId;
8756         iov[0].iov_len = len;
8757
8758         if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8759                 return 0;
8760
8761         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8762                 pr_err("bad smb2 signature\n");
8763                 return 0;
8764         }
8765
8766         return 1;
8767 }
8768
8769 /**
8770  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8771  * @work:   smb work containing notify command buffer
8772  *
8773  */
8774 void smb3_set_sign_rsp(struct ksmbd_work *work)
8775 {
8776         struct ksmbd_conn *conn = work->conn;
8777         struct smb2_hdr *hdr;
8778         struct channel *chann;
8779         char signature[SMB2_CMACAES_SIZE];
8780         struct kvec *iov;
8781         int n_vec = 1;
8782         char *signing_key;
8783
8784         hdr = ksmbd_resp_buf_curr(work);
8785
8786         if (conn->binding == false &&
8787             le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8788                 signing_key = work->sess->smb3signingkey;
8789         } else {
8790                 chann = lookup_chann_list(work->sess, work->conn);
8791                 if (!chann) {
8792                         return;
8793                 }
8794                 signing_key = chann->smb3signingkey;
8795         }
8796
8797         if (!signing_key)
8798                 return;
8799
8800         hdr->Flags |= SMB2_FLAGS_SIGNED;
8801         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8802
8803         if (hdr->Command == SMB2_READ) {
8804                 iov = &work->iov[work->iov_idx - 1];
8805                 n_vec++;
8806         } else {
8807                 iov = &work->iov[work->iov_idx];
8808         }
8809
8810         if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8811                                  signature))
8812                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8813 }
8814
8815 /**
8816  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8817  * @work:   smb work containing response buffer
8818  *
8819  */
8820 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8821 {
8822         struct ksmbd_conn *conn = work->conn;
8823         struct ksmbd_session *sess = work->sess;
8824         struct smb2_hdr *req, *rsp;
8825
8826         if (conn->dialect != SMB311_PROT_ID)
8827                 return;
8828
8829         WORK_BUFFERS(work, req, rsp);
8830
8831         if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8832             conn->preauth_info)
8833                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8834                                                  conn->preauth_info->Preauth_HashValue);
8835
8836         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8837                 __u8 *hash_value;
8838
8839                 if (conn->binding) {
8840                         struct preauth_session *preauth_sess;
8841
8842                         preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8843                         if (!preauth_sess)
8844                                 return;
8845                         hash_value = preauth_sess->Preauth_HashValue;
8846                 } else {
8847                         hash_value = sess->Preauth_HashValue;
8848                         if (!hash_value)
8849                                 return;
8850                 }
8851                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8852                                                  hash_value);
8853         }
8854 }
8855
8856 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8857 {
8858         struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8859         struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8860         unsigned int orig_len = get_rfc1002_len(old_buf);
8861
8862         /* tr_buf must be cleared by the caller */
8863         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8864         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8865         tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8866         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8867             cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8868                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8869         else
8870                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8871         memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8872         inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8873         inc_rfc1001_len(tr_buf, orig_len);
8874 }
8875
8876 int smb3_encrypt_resp(struct ksmbd_work *work)
8877 {
8878         struct kvec *iov = work->iov;
8879         int rc = -ENOMEM;
8880         void *tr_buf;
8881
8882         tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8883         if (!tr_buf)
8884                 return rc;
8885
8886         /* fill transform header */
8887         fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8888
8889         iov[0].iov_base = tr_buf;
8890         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8891         work->tr_buf = tr_buf;
8892
8893         return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
8894 }
8895
8896 bool smb3_is_transform_hdr(void *buf)
8897 {
8898         struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8899
8900         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8901 }
8902
8903 int smb3_decrypt_req(struct ksmbd_work *work)
8904 {
8905         struct ksmbd_session *sess;
8906         char *buf = work->request_buf;
8907         unsigned int pdu_length = get_rfc1002_len(buf);
8908         struct kvec iov[2];
8909         int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8910         struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8911         int rc = 0;
8912
8913         if (pdu_length < sizeof(struct smb2_transform_hdr) ||
8914             buf_data_size < sizeof(struct smb2_hdr)) {
8915                 pr_err("Transform message is too small (%u)\n",
8916                        pdu_length);
8917                 return -ECONNABORTED;
8918         }
8919
8920         if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8921                 pr_err("Transform message is broken\n");
8922                 return -ECONNABORTED;
8923         }
8924
8925         sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8926         if (!sess) {
8927                 pr_err("invalid session id(%llx) in transform header\n",
8928                        le64_to_cpu(tr_hdr->SessionId));
8929                 return -ECONNABORTED;
8930         }
8931
8932         iov[0].iov_base = buf;
8933         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8934         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8935         iov[1].iov_len = buf_data_size;
8936         rc = ksmbd_crypt_message(work, iov, 2, 0);
8937         if (rc)
8938                 return rc;
8939
8940         memmove(buf + 4, iov[1].iov_base, buf_data_size);
8941         *(__be32 *)buf = cpu_to_be32(buf_data_size);
8942
8943         return rc;
8944 }
8945
8946 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8947 {
8948         struct ksmbd_conn *conn = work->conn;
8949         struct ksmbd_session *sess = work->sess;
8950         struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8951
8952         if (conn->dialect < SMB30_PROT_ID)
8953                 return false;
8954
8955         if (work->next_smb2_rcv_hdr_off)
8956                 rsp = ksmbd_resp_buf_next(work);
8957
8958         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8959             sess->user && !user_guest(sess->user) &&
8960             rsp->Status == STATUS_SUCCESS)
8961                 return true;
8962         return false;
8963 }