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