fs/cifs/smb2ops.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  SMB2 version specific operations
   4  *
   5  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   6  */
   7
   8 #include <linux/pagemap.h>
   9 #include <linux/vfs.h>
  10 #include <linux/falloc.h>
  11 #include <linux/scatterlist.h>
  12 #include <linux/uuid.h>
  13 #include <linux/sort.h>
  14 #include <crypto/aead.h>
  15 #include <linux/fiemap.h>
  16 #include <uapi/linux/magic.h>
  17 #include "cifsfs.h"
  18 #include "cifsglob.h"
  19 #include "smb2pdu.h"
  20 #include "smb2proto.h"
  21 #include "cifsproto.h"
  22 #include "cifs_debug.h"
  23 #include "cifs_unicode.h"
  24 #include "smb2status.h"
  25 #include "smb2glob.h"
  26 #include "cifs_ioctl.h"
  27 #include "smbdirect.h"
  28 #include "fscache.h"
  29 #include "fs_context.h"
  30 #include "cached_dir.h"
  31
  32 /* Change credits for different ops and return the total number of credits */
  33 static int
  34 change_conf(struct TCP_Server_Info *server)
  35 {
  36         server->credits += server->echo_credits + server->oplock_credits;
  37         if (server->credits > server->max_credits)
  38                 server->credits = server->max_credits;
  39         server->oplock_credits = server->echo_credits = 0;
  40         switch (server->credits) {
  41         case 0:
  42                 return 0;
  43         case 1:
  44                 server->echoes = false;
  45                 server->oplocks = false;
  46                 break;
  47         case 2:
  48                 server->echoes = true;
  49                 server->oplocks = false;
  50                 server->echo_credits = 1;
  51                 break;
  52         default:
  53                 server->echoes = true;
  54                 if (enable_oplocks) {
  55                         server->oplocks = true;
  56                         server->oplock_credits = 1;
  57                 } else
  58                         server->oplocks = false;
  59
  60                 server->echo_credits = 1;
  61         }
  62         server->credits -= server->echo_credits + server->oplock_credits;
  63         return server->credits + server->echo_credits + server->oplock_credits;
  64 }
  65
  66 static void
  67 smb2_add_credits(struct TCP_Server_Info *server,
  68                  const struct cifs_credits *credits, const int optype)
  69 {
  70         int *val, rc = -1;
  71         int scredits, in_flight;
  72         unsigned int add = credits->value;
  73         unsigned int instance = credits->instance;
  74         bool reconnect_detected = false;
  75         bool reconnect_with_invalid_credits = false;
  76
  77         spin_lock(&server->req_lock);
  78         val = server->ops->get_credits_field(server, optype);
  79
  80         /* eg found case where write overlapping reconnect messed up credits */
  81         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  82                 reconnect_with_invalid_credits = true;
  83
  84         if ((instance == 0) || (instance == server->reconnect_instance))
  85                 *val += add;
  86         else
  87                 reconnect_detected = true;
  88
  89         if (*val > 65000) {
  90                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  91                 pr_warn_once("server overflowed SMB3 credits\n");
  92                 trace_smb3_overflow_credits(server->CurrentMid,
  93                                             server->conn_id, server->hostname, *val,
  94                                             add, server->in_flight);
  95         }
  96         WARN_ON_ONCE(server->in_flight == 0);
  97         server->in_flight--;
  98         if (server->in_flight == 0 &&
  99            ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
 100            ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
 101                 rc = change_conf(server);
 102         /*
 103          * Sometimes server returns 0 credits on oplock break ack - we need to
 104          * rebalance credits in this case.
 105          */
 106         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
 107                  server->oplocks) {
 108                 if (server->credits > 1) {
 109                         server->credits--;
 110                         server->oplock_credits++;
 111                 }
 112         }
 113         scredits = *val;
 114         in_flight = server->in_flight;
 115         spin_unlock(&server->req_lock);
 116         wake_up(&server->request_q);
 117
 118         if (reconnect_detected) {
 119                 trace_smb3_reconnect_detected(server->CurrentMid,
 120                         server->conn_id, server->hostname, scredits, add, in_flight);
 121
 122                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 123                          add, instance);
 124         }
 125
 126         if (reconnect_with_invalid_credits) {
 127                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
 128                         server->conn_id, server->hostname, scredits, add, in_flight);
 129                 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
 130                          optype, scredits, add);
 131         }
 132
 133         spin_lock(&server->srv_lock);
 134         if (server->tcpStatus == CifsNeedReconnect
 135             || server->tcpStatus == CifsExiting) {
 136                 spin_unlock(&server->srv_lock);
 137                 return;
 138         }
 139         spin_unlock(&server->srv_lock);
 140
 141         switch (rc) {
 142         case -1:
 143                 /* change_conf hasn't been executed */
 144                 break;
 145         case 0:
 146                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 147                 break;
 148         case 1:
 149                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 150                 break;
 151         case 2:
 152                 cifs_dbg(FYI, "disabling oplocks\n");
 153                 break;
 154         default:
 155                 /* change_conf rebalanced credits for different types */
 156                 break;
 157         }
 158
 159         trace_smb3_add_credits(server->CurrentMid,
 160                         server->conn_id, server->hostname, scredits, add, in_flight);
 161         cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
 162 }
 163
 164 static void
 165 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 166 {
 167         int scredits, in_flight;
 168
 169         spin_lock(&server->req_lock);
 170         server->credits = val;
 171         if (val == 1)
 172                 server->reconnect_instance++;
 173         scredits = server->credits;
 174         in_flight = server->in_flight;
 175         spin_unlock(&server->req_lock);
 176
 177         trace_smb3_set_credits(server->CurrentMid,
 178                         server->conn_id, server->hostname, scredits, val, in_flight);
 179         cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
 180
 181         /* don't log while holding the lock */
 182         if (val == 1)
 183                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 184 }
 185
 186 static int *
 187 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 188 {
 189         switch (optype) {
 190         case CIFS_ECHO_OP:
 191                 return &server->echo_credits;
 192         case CIFS_OBREAK_OP:
 193                 return &server->oplock_credits;
 194         default:
 195                 return &server->credits;
 196         }
 197 }
 198
 199 static unsigned int
 200 smb2_get_credits(struct mid_q_entry *mid)
 201 {
 202         return mid->credits_received;
 203 }
 204
 205 static int
 206 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 207                       unsigned int *num, struct cifs_credits *credits)
 208 {
 209         int rc = 0;
 210         unsigned int scredits, in_flight;
 211
 212         spin_lock(&server->req_lock);
 213         while (1) {
 214                 if (server->credits <= 0) {
 215                         spin_unlock(&server->req_lock);
 216                         cifs_num_waiters_inc(server);
 217                         rc = wait_event_killable(server->request_q,
 218                                 has_credits(server, &server->credits, 1));
 219                         cifs_num_waiters_dec(server);
 220                         if (rc)
 221                                 return rc;
 222                         spin_lock(&server->req_lock);
 223                 } else {
 224                         spin_unlock(&server->req_lock);
 225                         spin_lock(&server->srv_lock);
 226                         if (server->tcpStatus == CifsExiting) {
 227                                 spin_unlock(&server->srv_lock);
 228                                 return -ENOENT;
 229                         }
 230                         spin_unlock(&server->srv_lock);
 231
 232                         spin_lock(&server->req_lock);
 233                         scredits = server->credits;
 234                         /* can deadlock with reopen */
 235                         if (scredits <= 8) {
 236                                 *num = SMB2_MAX_BUFFER_SIZE;
 237                                 credits->value = 0;
 238                                 credits->instance = 0;
 239                                 break;
 240                         }
 241
 242                         /* leave some credits for reopen and other ops */
 243                         scredits -= 8;
 244                         *num = min_t(unsigned int, size,
 245                                      scredits * SMB2_MAX_BUFFER_SIZE);
 246
 247                         credits->value =
 248                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 249                         credits->instance = server->reconnect_instance;
 250                         server->credits -= credits->value;
 251                         server->in_flight++;
 252                         if (server->in_flight > server->max_in_flight)
 253                                 server->max_in_flight = server->in_flight;
 254                         break;
 255                 }
 256         }
 257         scredits = server->credits;
 258         in_flight = server->in_flight;
 259         spin_unlock(&server->req_lock);
 260
 261         trace_smb3_wait_credits(server->CurrentMid,
 262                         server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
 263         cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
 264                         __func__, credits->value, scredits);
 265
 266         return rc;
 267 }
 268
 269 static int
 270 smb2_adjust_credits(struct TCP_Server_Info *server,
 271                     struct cifs_credits *credits,
 272                     const unsigned int payload_size)
 273 {
 274         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 275         int scredits, in_flight;
 276
 277         if (!credits->value || credits->value == new_val)
 278                 return 0;
 279
 280         if (credits->value < new_val) {
 281                 trace_smb3_too_many_credits(server->CurrentMid,
 282                                 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
 283                 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
 284                                 credits->value, new_val);
 285
 286                 return -ENOTSUPP;
 287         }
 288
 289         spin_lock(&server->req_lock);
 290
 291         if (server->reconnect_instance != credits->instance) {
 292                 scredits = server->credits;
 293                 in_flight = server->in_flight;
 294                 spin_unlock(&server->req_lock);
 295
 296                 trace_smb3_reconnect_detected(server->CurrentMid,
 297                         server->conn_id, server->hostname, scredits,
 298                         credits->value - new_val, in_flight);
 299                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 300                          credits->value - new_val);
 301                 return -EAGAIN;
 302         }
 303
 304         server->credits += credits->value - new_val;
 305         scredits = server->credits;
 306         in_flight = server->in_flight;
 307         spin_unlock(&server->req_lock);
 308         wake_up(&server->request_q);
 309
 310         trace_smb3_adj_credits(server->CurrentMid,
 311                         server->conn_id, server->hostname, scredits,
 312                         credits->value - new_val, in_flight);
 313         cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
 314                         __func__, credits->value - new_val, scredits);
 315
 316         credits->value = new_val;
 317
 318         return 0;
 319 }
 320
 321 static __u64
 322 smb2_get_next_mid(struct TCP_Server_Info *server)
 323 {
 324         __u64 mid;
 325         /* for SMB2 we need the current value */
 326         spin_lock(&server->mid_lock);
 327         mid = server->CurrentMid++;
 328         spin_unlock(&server->mid_lock);
 329         return mid;
 330 }
 331
 332 static void
 333 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 334 {
 335         spin_lock(&server->mid_lock);
 336         if (server->CurrentMid >= val)
 337                 server->CurrentMid -= val;
 338         spin_unlock(&server->mid_lock);
 339 }
 340
 341 static struct mid_q_entry *
 342 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 343 {
 344         struct mid_q_entry *mid;
 345         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 346         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 347
 348         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 349                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 350                 return NULL;
 351         }
 352
 353         spin_lock(&server->mid_lock);
 354         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 355                 if ((mid->mid == wire_mid) &&
 356                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 357                     (mid->command == shdr->Command)) {
 358                         kref_get(&mid->refcount);
 359                         if (dequeue) {
 360                                 list_del_init(&mid->qhead);
 361                                 mid->mid_flags |= MID_DELETED;
 362                         }
 363                         spin_unlock(&server->mid_lock);
 364                         return mid;
 365                 }
 366         }
 367         spin_unlock(&server->mid_lock);
 368         return NULL;
 369 }
 370
 371 static struct mid_q_entry *
 372 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 373 {
 374         return __smb2_find_mid(server, buf, false);
 375 }
 376
 377 static struct mid_q_entry *
 378 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
 379 {
 380         return __smb2_find_mid(server, buf, true);
 381 }
 382
 383 static void
 384 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 385 {
 386 #ifdef CONFIG_CIFS_DEBUG2
 387         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 388
 389         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 390                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 391                  shdr->Id.SyncId.ProcessId);
 392         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 393                  server->ops->calc_smb_size(buf));
 394 #endif
 395 }
 396
 397 static bool
 398 smb2_need_neg(struct TCP_Server_Info *server)
 399 {
 400         return server->max_read == 0;
 401 }
 402
 403 static int
 404 smb2_negotiate(const unsigned int xid,
 405                struct cifs_ses *ses,
 406                struct TCP_Server_Info *server)
 407 {
 408         int rc;
 409
 410         spin_lock(&server->mid_lock);
 411         server->CurrentMid = 0;
 412         spin_unlock(&server->mid_lock);
 413         rc = SMB2_negotiate(xid, ses, server);
 414         /* BB we probably don't need to retry with modern servers */
 415         if (rc == -EAGAIN)
 416                 rc = -EHOSTDOWN;
 417         return rc;
 418 }
 419
 420 static unsigned int
 421 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 422 {
 423         struct TCP_Server_Info *server = tcon->ses->server;
 424         unsigned int wsize;
 425
 426         /* start with specified wsize, or default */
 427         wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
 428         wsize = min_t(unsigned int, wsize, server->max_write);
 429         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 430                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 431
 432         return wsize;
 433 }
 434
 435 static unsigned int
 436 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 437 {
 438         struct TCP_Server_Info *server = tcon->ses->server;
 439         unsigned int wsize;
 440
 441         /* start with specified wsize, or default */
 442         wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
 443         wsize = min_t(unsigned int, wsize, server->max_write);
 444 #ifdef CONFIG_CIFS_SMB_DIRECT
 445         if (server->rdma) {
 446                 if (server->sign)
 447                         /*
 448                          * Account for SMB2 data transfer packet header and
 449                          * possible encryption header
 450                          */
 451                         wsize = min_t(unsigned int,
 452                                 wsize,
 453                                 server->smbd_conn->max_fragmented_send_size -
 454                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 455                                         sizeof(struct smb2_transform_hdr));
 456                 else
 457                         wsize = min_t(unsigned int,
 458                                 wsize, server->smbd_conn->max_readwrite_size);
 459         }
 460 #endif
 461         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 462                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 463
 464         return wsize;
 465 }
 466
 467 static unsigned int
 468 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 469 {
 470         struct TCP_Server_Info *server = tcon->ses->server;
 471         unsigned int rsize;
 472
 473         /* start with specified rsize, or default */
 474         rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
 475         rsize = min_t(unsigned int, rsize, server->max_read);
 476
 477         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 478                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 479
 480         return rsize;
 481 }
 482
 483 static unsigned int
 484 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 485 {
 486         struct TCP_Server_Info *server = tcon->ses->server;
 487         unsigned int rsize;
 488
 489         /* start with specified rsize, or default */
 490         rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
 491         rsize = min_t(unsigned int, rsize, server->max_read);
 492 #ifdef CONFIG_CIFS_SMB_DIRECT
 493         if (server->rdma) {
 494                 if (server->sign)
 495                         /*
 496                          * Account for SMB2 data transfer packet header and
 497                          * possible encryption header
 498                          */
 499                         rsize = min_t(unsigned int,
 500                                 rsize,
 501                                 server->smbd_conn->max_fragmented_recv_size -
 502                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 503                                         sizeof(struct smb2_transform_hdr));
 504                 else
 505                         rsize = min_t(unsigned int,
 506                                 rsize, server->smbd_conn->max_readwrite_size);
 507         }
 508 #endif
 509
 510         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 511                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 512
 513         return rsize;
 514 }
 515
 516 /*
 517  * compare two interfaces a and b
 518  * return 0 if everything matches.
 519  * return 1 if a is rdma capable, or rss capable, or has higher link speed
 520  * return -1 otherwise.
 521  */
 522 static int
 523 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
 524 {
 525         int cmp_ret = 0;
 526
 527         WARN_ON(!a || !b);
 528         if (a->rdma_capable == b->rdma_capable) {
 529                 if (a->rss_capable == b->rss_capable) {
 530                         if (a->speed == b->speed) {
 531                                 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr,
 532                                                           (struct sockaddr *) &b->sockaddr);
 533                                 if (!cmp_ret)
 534                                         return 0;
 535                                 else if (cmp_ret > 0)
 536                                         return 1;
 537                                 else
 538                                         return -1;
 539                         } else if (a->speed > b->speed)
 540                                 return 1;
 541                         else
 542                                 return -1;
 543                 } else if (a->rss_capable > b->rss_capable)
 544                         return 1;
 545                 else
 546                         return -1;
 547         } else if (a->rdma_capable > b->rdma_capable)
 548                 return 1;
 549         else
 550                 return -1;
 551 }
 552
 553 static int
 554 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 555                         size_t buf_len, struct cifs_ses *ses, bool in_mount)
 556 {
 557         struct network_interface_info_ioctl_rsp *p;
 558         struct sockaddr_in *addr4;
 559         struct sockaddr_in6 *addr6;
 560         struct iface_info_ipv4 *p4;
 561         struct iface_info_ipv6 *p6;
 562         struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
 563         struct cifs_server_iface tmp_iface;
 564         ssize_t bytes_left;
 565         size_t next = 0;
 566         int nb_iface = 0;
 567         int rc = 0, ret = 0;
 568
 569         bytes_left = buf_len;
 570         p = buf;
 571
 572         spin_lock(&ses->iface_lock);
 573         /* do not query too frequently, this time with lock held */
 574         if (ses->iface_last_update &&
 575             time_before(jiffies, ses->iface_last_update +
 576                         (SMB_INTERFACE_POLL_INTERVAL * HZ))) {
 577                 spin_unlock(&ses->iface_lock);
 578                 return 0;
 579         }
 580
 581         /*
 582          * Go through iface_list and do kref_put to remove
 583          * any unused ifaces. ifaces in use will be removed
 584          * when the last user calls a kref_put on it
 585          */
 586         list_for_each_entry_safe(iface, niface, &ses->iface_list,
 587                                  iface_head) {
 588                 iface->is_active = 0;
 589                 kref_put(&iface->refcount, release_iface);
 590                 ses->iface_count--;
 591         }
 592         spin_unlock(&ses->iface_lock);
 593
 594         /*
 595          * Samba server e.g. can return an empty interface list in some cases,
 596          * which would only be a problem if we were requesting multichannel
 597          */
 598         if (bytes_left == 0) {
 599                 /* avoid spamming logs every 10 minutes, so log only in mount */
 600                 if ((ses->chan_max > 1) && in_mount)
 601                         cifs_dbg(VFS,
 602                                  "multichannel not available\n"
 603                                  "Empty network interface list returned by server %s\n",
 604                                  ses->server->hostname);
 605                 rc = -EINVAL;
 606                 goto out;
 607         }
 608
 609         while (bytes_left >= sizeof(*p)) {
 610                 memset(&tmp_iface, 0, sizeof(tmp_iface));
 611                 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
 612                 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 613                 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 614
 615                 switch (p->Family) {
 616                 /*
 617                  * The kernel and wire socket structures have the same
 618                  * layout and use network byte order but make the
 619                  * conversion explicit in case either one changes.
 620                  */
 621                 case INTERNETWORK:
 622                         addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
 623                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 624                         addr4->sin_family = AF_INET;
 625                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 626
 627                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 628                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 629
 630                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 631                                  &addr4->sin_addr);
 632                         break;
 633                 case INTERNETWORKV6:
 634                         addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
 635                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 636                         addr6->sin6_family = AF_INET6;
 637                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 638
 639                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 640                         addr6->sin6_flowinfo = 0;
 641                         addr6->sin6_scope_id = 0;
 642                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 643
 644                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 645                                  &addr6->sin6_addr);
 646                         break;
 647                 default:
 648                         cifs_dbg(VFS,
 649                                  "%s: skipping unsupported socket family\n",
 650                                  __func__);
 651                         goto next_iface;
 652                 }
 653
 654                 /*
 655                  * The iface_list is assumed to be sorted by speed.
 656                  * Check if the new interface exists in that list.
 657                  * NEVER change iface. it could be in use.
 658                  * Add a new one instead
 659                  */
 660                 spin_lock(&ses->iface_lock);
 661                 list_for_each_entry_safe(iface, niface, &ses->iface_list,
 662                                          iface_head) {
 663                         ret = iface_cmp(iface, &tmp_iface);
 664                         if (!ret) {
 665                                 /* just get a ref so that it doesn't get picked/freed */
 666                                 iface->is_active = 1;
 667                                 kref_get(&iface->refcount);
 668                                 ses->iface_count++;
 669                                 spin_unlock(&ses->iface_lock);
 670                                 goto next_iface;
 671                         } else if (ret < 0) {
 672                                 /* all remaining ifaces are slower */
 673                                 kref_get(&iface->refcount);
 674                                 break;
 675                         }
 676                 }
 677                 spin_unlock(&ses->iface_lock);
 678
 679                 /* no match. insert the entry in the list */
 680                 info = kmalloc(sizeof(struct cifs_server_iface),
 681                                GFP_KERNEL);
 682                 if (!info) {
 683                         rc = -ENOMEM;
 684                         goto out;
 685                 }
 686                 memcpy(info, &tmp_iface, sizeof(tmp_iface));
 687
 688                 /* add this new entry to the list */
 689                 kref_init(&info->refcount);
 690                 info->is_active = 1;
 691
 692                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
 693                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 694                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 695                          le32_to_cpu(p->Capability));
 696
 697                 spin_lock(&ses->iface_lock);
 698                 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
 699                         list_add_tail(&info->iface_head, &iface->iface_head);
 700                         kref_put(&iface->refcount, release_iface);
 701                 } else
 702                         list_add_tail(&info->iface_head, &ses->iface_list);
 703
 704                 ses->iface_count++;
 705                 spin_unlock(&ses->iface_lock);
 706                 ses->iface_last_update = jiffies;
 707 next_iface:
 708                 nb_iface++;
 709                 next = le32_to_cpu(p->Next);
 710                 if (!next) {
 711                         bytes_left -= sizeof(*p);
 712                         break;
 713                 }
 714                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 715                 bytes_left -= next;
 716         }
 717
 718         if (!nb_iface) {
 719                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 720                 rc = -EINVAL;
 721                 goto out;
 722         }
 723
 724         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 725         if ((bytes_left > 8) || p->Next)
 726                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 727
 728
 729         if (!ses->iface_count) {
 730                 rc = -EINVAL;
 731                 goto out;
 732         }
 733
 734 out:
 735         return rc;
 736 }
 737
 738 int
 739 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
 740 {
 741         int rc;
 742         unsigned int ret_data_len = 0;
 743         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 744         struct cifs_ses *ses = tcon->ses;
 745
 746         /* do not query too frequently */
 747         if (ses->iface_last_update &&
 748             time_before(jiffies, ses->iface_last_update +
 749                         (SMB_INTERFACE_POLL_INTERVAL * HZ)))
 750                 return 0;
 751
 752         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 753                         FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 754                         NULL /* no data input */, 0 /* no data input */,
 755                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 756         if (rc == -EOPNOTSUPP) {
 757                 cifs_dbg(FYI,
 758                          "server does not support query network interfaces\n");
 759                 ret_data_len = 0;
 760         } else if (rc != 0) {
 761                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 762                 goto out;
 763         }
 764
 765         rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
 766         if (rc)
 767                 goto out;
 768
 769 out:
 770         kfree(out_buf);
 771         return rc;
 772 }
 773
 774 static void
 775 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 776               struct cifs_sb_info *cifs_sb)
 777 {
 778         int rc;
 779         __le16 srch_path = 0; /* Null - open root of share */
 780         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 781         struct cifs_open_parms oparms;
 782         struct cifs_fid fid;
 783         struct cached_fid *cfid = NULL;
 784
 785         oparms = (struct cifs_open_parms) {
 786                 .tcon = tcon,
 787                 .path = "",
 788                 .desired_access = FILE_READ_ATTRIBUTES,
 789                 .disposition = FILE_OPEN,
 790                 .create_options = cifs_create_options(cifs_sb, 0),
 791                 .fid = &fid,
 792         };
 793
 794         rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
 795         if (rc == 0)
 796                 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
 797         else
 798                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 799                                NULL, NULL);
 800         if (rc)
 801                 return;
 802
 803         SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
 804
 805         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 806                         FS_ATTRIBUTE_INFORMATION);
 807         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 808                         FS_DEVICE_INFORMATION);
 809         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 810                         FS_VOLUME_INFORMATION);
 811         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 812                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 813         if (cfid == NULL)
 814                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 815         else
 816                 close_cached_dir(cfid);
 817 }
 818
 819 static void
 820 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 821               struct cifs_sb_info *cifs_sb)
 822 {
 823         int rc;
 824         __le16 srch_path = 0; /* Null - open root of share */
 825         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 826         struct cifs_open_parms oparms;
 827         struct cifs_fid fid;
 828
 829         oparms = (struct cifs_open_parms) {
 830                 .tcon = tcon,
 831                 .path = "",
 832                 .desired_access = FILE_READ_ATTRIBUTES,
 833                 .disposition = FILE_OPEN,
 834                 .create_options = cifs_create_options(cifs_sb, 0),
 835                 .fid = &fid,
 836         };
 837
 838         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 839                        NULL, NULL);
 840         if (rc)
 841                 return;
 842
 843         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 844                         FS_ATTRIBUTE_INFORMATION);
 845         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 846                         FS_DEVICE_INFORMATION);
 847         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 848 }
 849
 850 static int
 851 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 852                         struct cifs_sb_info *cifs_sb, const char *full_path)
 853 {
 854         __le16 *utf16_path;
 855         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 856         int err_buftype = CIFS_NO_BUFFER;
 857         struct cifs_open_parms oparms;
 858         struct kvec err_iov = {};
 859         struct cifs_fid fid;
 860         struct cached_fid *cfid;
 861         bool islink;
 862         int rc, rc2;
 863
 864         rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
 865         if (!rc) {
 866                 if (cfid->has_lease) {
 867                         close_cached_dir(cfid);
 868                         return 0;
 869                 }
 870                 close_cached_dir(cfid);
 871         }
 872
 873         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 874         if (!utf16_path)
 875                 return -ENOMEM;
 876
 877         oparms = (struct cifs_open_parms) {
 878                 .tcon = tcon,
 879                 .path = full_path,
 880                 .desired_access = FILE_READ_ATTRIBUTES,
 881                 .disposition = FILE_OPEN,
 882                 .create_options = cifs_create_options(cifs_sb, 0),
 883                 .fid = &fid,
 884         };
 885
 886         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
 887                        &err_iov, &err_buftype);
 888         if (rc) {
 889                 struct smb2_hdr *hdr = err_iov.iov_base;
 890
 891                 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
 892                         goto out;
 893
 894                 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
 895                         rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 896                                                              full_path, &islink);
 897                         if (rc2) {
 898                                 rc = rc2;
 899                                 goto out;
 900                         }
 901                         if (islink)
 902                                 rc = -EREMOTE;
 903                 }
 904                 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
 905                     (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
 906                         rc = -EOPNOTSUPP;
 907                 goto out;
 908         }
 909
 910         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 911
 912 out:
 913         free_rsp_buf(err_buftype, err_iov.iov_base);
 914         kfree(utf16_path);
 915         return rc;
 916 }
 917
 918 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 919                              struct cifs_sb_info *cifs_sb, const char *full_path,
 920                              u64 *uniqueid, struct cifs_open_info_data *data)
 921 {
 922         *uniqueid = le64_to_cpu(data->fi.IndexNumber);
 923         return 0;
 924 }
 925
 926 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 927                                 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
 928 {
 929         struct cifs_fid *fid = &cfile->fid;
 930
 931         if (cfile->symlink_target) {
 932                 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 933                 if (!data->symlink_target)
 934                         return -ENOMEM;
 935         }
 936         return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
 937 }
 938
 939 #ifdef CONFIG_CIFS_XATTR
 940 static ssize_t
 941 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 942                      struct smb2_file_full_ea_info *src, size_t src_size,
 943                      const unsigned char *ea_name)
 944 {
 945         int rc = 0;
 946         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 947         char *name, *value;
 948         size_t buf_size = dst_size;
 949         size_t name_len, value_len, user_name_len;
 950
 951         while (src_size > 0) {
 952                 name_len = (size_t)src->ea_name_length;
 953                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 954
 955                 if (name_len == 0)
 956                         break;
 957
 958                 if (src_size < 8 + name_len + 1 + value_len) {
 959                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 960                         rc = -EIO;
 961                         goto out;
 962                 }
 963
 964                 name = &src->ea_data[0];
 965                 value = &src->ea_data[src->ea_name_length + 1];
 966
 967                 if (ea_name) {
 968                         if (ea_name_len == name_len &&
 969                             memcmp(ea_name, name, name_len) == 0) {
 970                                 rc = value_len;
 971                                 if (dst_size == 0)
 972                                         goto out;
 973                                 if (dst_size < value_len) {
 974                                         rc = -ERANGE;
 975                                         goto out;
 976                                 }
 977                                 memcpy(dst, value, value_len);
 978                                 goto out;
 979                         }
 980                 } else {
 981                         /* 'user.' plus a terminating null */
 982                         user_name_len = 5 + 1 + name_len;
 983
 984                         if (buf_size == 0) {
 985                                 /* skip copy - calc size only */
 986                                 rc += user_name_len;
 987                         } else if (dst_size >= user_name_len) {
 988                                 dst_size -= user_name_len;
 989                                 memcpy(dst, "user.", 5);
 990                                 dst += 5;
 991                                 memcpy(dst, src->ea_data, name_len);
 992                                 dst += name_len;
 993                                 *dst = 0;
 994                                 ++dst;
 995                                 rc += user_name_len;
 996                         } else {
 997                                 /* stop before overrun buffer */
 998                                 rc = -ERANGE;
 999                                 break;
1000                         }
1001                 }
1002
1003                 if (!src->next_entry_offset)
1004                         break;
1005
1006                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1007                         /* stop before overrun buffer */
1008                         rc = -ERANGE;
1009                         break;
1010                 }
1011                 src_size -= le32_to_cpu(src->next_entry_offset);
1012                 src = (void *)((char *)src +
1013                                le32_to_cpu(src->next_entry_offset));
1014         }
1015
1016         /* didn't find the named attribute */
1017         if (ea_name)
1018                 rc = -ENODATA;
1019
1020 out:
1021         return (ssize_t)rc;
1022 }
1023
1024 static ssize_t
1025 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1026                const unsigned char *path, const unsigned char *ea_name,
1027                char *ea_data, size_t buf_size,
1028                struct cifs_sb_info *cifs_sb)
1029 {
1030         int rc;
1031         struct kvec rsp_iov = {NULL, 0};
1032         int buftype = CIFS_NO_BUFFER;
1033         struct smb2_query_info_rsp *rsp;
1034         struct smb2_file_full_ea_info *info = NULL;
1035
1036         rc = smb2_query_info_compound(xid, tcon, path,
1037                                       FILE_READ_EA,
1038                                       FILE_FULL_EA_INFORMATION,
1039                                       SMB2_O_INFO_FILE,
1040                                       CIFSMaxBufSize -
1041                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1042                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1043                                       &rsp_iov, &buftype, cifs_sb);
1044         if (rc) {
1045                 /*
1046                  * If ea_name is NULL (listxattr) and there are no EAs,
1047                  * return 0 as it's not an error. Otherwise, the specified
1048                  * ea_name was not found.
1049                  */
1050                 if (!ea_name && rc == -ENODATA)
1051                         rc = 0;
1052                 goto qeas_exit;
1053         }
1054
1055         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1056         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1057                                le32_to_cpu(rsp->OutputBufferLength),
1058                                &rsp_iov,
1059                                sizeof(struct smb2_file_full_ea_info));
1060         if (rc)
1061                 goto qeas_exit;
1062
1063         info = (struct smb2_file_full_ea_info *)(
1064                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1065         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1066                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1067
1068  qeas_exit:
1069         free_rsp_buf(buftype, rsp_iov.iov_base);
1070         return rc;
1071 }
1072
1073
1074 static int
1075 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1076             const char *path, const char *ea_name, const void *ea_value,
1077             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1078             struct cifs_sb_info *cifs_sb)
1079 {
1080         struct cifs_ses *ses = tcon->ses;
1081         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1082         __le16 *utf16_path = NULL;
1083         int ea_name_len = strlen(ea_name);
1084         int flags = CIFS_CP_CREATE_CLOSE_OP;
1085         int len;
1086         struct smb_rqst rqst[3];
1087         int resp_buftype[3];
1088         struct kvec rsp_iov[3];
1089         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1090         struct cifs_open_parms oparms;
1091         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1092         struct cifs_fid fid;
1093         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1094         unsigned int size[1];
1095         void *data[1];
1096         struct smb2_file_full_ea_info *ea = NULL;
1097         struct kvec close_iov[1];
1098         struct smb2_query_info_rsp *rsp;
1099         int rc, used_len = 0;
1100
1101         if (smb3_encryption_required(tcon))
1102                 flags |= CIFS_TRANSFORM_REQ;
1103
1104         if (ea_name_len > 255)
1105                 return -EINVAL;
1106
1107         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1108         if (!utf16_path)
1109                 return -ENOMEM;
1110
1111         memset(rqst, 0, sizeof(rqst));
1112         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1113         memset(rsp_iov, 0, sizeof(rsp_iov));
1114
1115         if (ses->server->ops->query_all_EAs) {
1116                 if (!ea_value) {
1117                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1118                                                              ea_name, NULL, 0,
1119                                                              cifs_sb);
1120                         if (rc == -ENODATA)
1121                                 goto sea_exit;
1122                 } else {
1123                         /* If we are adding a attribute we should first check
1124                          * if there will be enough space available to store
1125                          * the new EA. If not we should not add it since we
1126                          * would not be able to even read the EAs back.
1127                          */
1128                         rc = smb2_query_info_compound(xid, tcon, path,
1129                                       FILE_READ_EA,
1130                                       FILE_FULL_EA_INFORMATION,
1131                                       SMB2_O_INFO_FILE,
1132                                       CIFSMaxBufSize -
1133                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1134                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1135                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1136                         if (rc == 0) {
1137                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1138                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1139                         }
1140                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1141                         resp_buftype[1] = CIFS_NO_BUFFER;
1142                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1143                         rc = 0;
1144
1145                         /* Use a fudge factor of 256 bytes in case we collide
1146                          * with a different set_EAs command.
1147                          */
1148                         if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1149                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1150                            used_len + ea_name_len + ea_value_len + 1) {
1151                                 rc = -ENOSPC;
1152                                 goto sea_exit;
1153                         }
1154                 }
1155         }
1156
1157         /* Open */
1158         memset(&open_iov, 0, sizeof(open_iov));
1159         rqst[0].rq_iov = open_iov;
1160         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1161
1162         oparms = (struct cifs_open_parms) {
1163                 .tcon = tcon,
1164                 .path = path,
1165                 .desired_access = FILE_WRITE_EA,
1166                 .disposition = FILE_OPEN,
1167                 .create_options = cifs_create_options(cifs_sb, 0),
1168                 .fid = &fid,
1169         };
1170
1171         rc = SMB2_open_init(tcon, server,
1172                             &rqst[0], &oplock, &oparms, utf16_path);
1173         if (rc)
1174                 goto sea_exit;
1175         smb2_set_next_command(tcon, &rqst[0]);
1176
1177
1178         /* Set Info */
1179         memset(&si_iov, 0, sizeof(si_iov));
1180         rqst[1].rq_iov = si_iov;
1181         rqst[1].rq_nvec = 1;
1182
1183         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1184         ea = kzalloc(len, GFP_KERNEL);
1185         if (ea == NULL) {
1186                 rc = -ENOMEM;
1187                 goto sea_exit;
1188         }
1189
1190         ea->ea_name_length = ea_name_len;
1191         ea->ea_value_length = cpu_to_le16(ea_value_len);
1192         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1193         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1194
1195         size[0] = len;
1196         data[0] = ea;
1197
1198         rc = SMB2_set_info_init(tcon, server,
1199                                 &rqst[1], COMPOUND_FID,
1200                                 COMPOUND_FID, current->tgid,
1201                                 FILE_FULL_EA_INFORMATION,
1202                                 SMB2_O_INFO_FILE, 0, data, size);
1203         if (rc)
1204                 goto sea_exit;
1205         smb2_set_next_command(tcon, &rqst[1]);
1206         smb2_set_related(&rqst[1]);
1207
1208
1209         /* Close */
1210         memset(&close_iov, 0, sizeof(close_iov));
1211         rqst[2].rq_iov = close_iov;
1212         rqst[2].rq_nvec = 1;
1213         rc = SMB2_close_init(tcon, server,
1214                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1215         if (rc)
1216                 goto sea_exit;
1217         smb2_set_related(&rqst[2]);
1218
1219         rc = compound_send_recv(xid, ses, server,
1220                                 flags, 3, rqst,
1221                                 resp_buftype, rsp_iov);
1222         /* no need to bump num_remote_opens because handle immediately closed */
1223
1224  sea_exit:
1225         kfree(ea);
1226         kfree(utf16_path);
1227         SMB2_open_free(&rqst[0]);
1228         SMB2_set_info_free(&rqst[1]);
1229         SMB2_close_free(&rqst[2]);
1230         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1231         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1232         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1233         return rc;
1234 }
1235 #endif
1236
1237 static bool
1238 smb2_can_echo(struct TCP_Server_Info *server)
1239 {
1240         return server->echoes;
1241 }
1242
1243 static void
1244 smb2_clear_stats(struct cifs_tcon *tcon)
1245 {
1246         int i;
1247
1248         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1249                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1250                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1251         }
1252 }
1253
1254 static void
1255 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1256 {
1257         seq_puts(m, "\n\tShare Capabilities:");
1258         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1259                 seq_puts(m, " DFS,");
1260         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1261                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1262         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1263                 seq_puts(m, " SCALEOUT,");
1264         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1265                 seq_puts(m, " CLUSTER,");
1266         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1267                 seq_puts(m, " ASYMMETRIC,");
1268         if (tcon->capabilities == 0)
1269                 seq_puts(m, " None");
1270         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1271                 seq_puts(m, " Aligned,");
1272         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1273                 seq_puts(m, " Partition Aligned,");
1274         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1275                 seq_puts(m, " SSD,");
1276         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1277                 seq_puts(m, " TRIM-support,");
1278
1279         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1280         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1281         if (tcon->perf_sector_size)
1282                 seq_printf(m, "\tOptimal sector size: 0x%x",
1283                            tcon->perf_sector_size);
1284         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1285 }
1286
1287 static void
1288 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1289 {
1290         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1291         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1292
1293         /*
1294          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1295          *  totals (requests sent) since those SMBs are per-session not per tcon
1296          */
1297         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1298                    (long long)(tcon->bytes_read),
1299                    (long long)(tcon->bytes_written));
1300         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1301                    atomic_read(&tcon->num_local_opens),
1302                    atomic_read(&tcon->num_remote_opens));
1303         seq_printf(m, "\nTreeConnects: %d total %d failed",
1304                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1305                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1306         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1307                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1308                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1309         seq_printf(m, "\nCreates: %d total %d failed",
1310                    atomic_read(&sent[SMB2_CREATE_HE]),
1311                    atomic_read(&failed[SMB2_CREATE_HE]));
1312         seq_printf(m, "\nCloses: %d total %d failed",
1313                    atomic_read(&sent[SMB2_CLOSE_HE]),
1314                    atomic_read(&failed[SMB2_CLOSE_HE]));
1315         seq_printf(m, "\nFlushes: %d total %d failed",
1316                    atomic_read(&sent[SMB2_FLUSH_HE]),
1317                    atomic_read(&failed[SMB2_FLUSH_HE]));
1318         seq_printf(m, "\nReads: %d total %d failed",
1319                    atomic_read(&sent[SMB2_READ_HE]),
1320                    atomic_read(&failed[SMB2_READ_HE]));
1321         seq_printf(m, "\nWrites: %d total %d failed",
1322                    atomic_read(&sent[SMB2_WRITE_HE]),
1323                    atomic_read(&failed[SMB2_WRITE_HE]));
1324         seq_printf(m, "\nLocks: %d total %d failed",
1325                    atomic_read(&sent[SMB2_LOCK_HE]),
1326                    atomic_read(&failed[SMB2_LOCK_HE]));
1327         seq_printf(m, "\nIOCTLs: %d total %d failed",
1328                    atomic_read(&sent[SMB2_IOCTL_HE]),
1329                    atomic_read(&failed[SMB2_IOCTL_HE]));
1330         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1331                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1332                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1333         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1334                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1335                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1336         seq_printf(m, "\nQueryInfos: %d total %d failed",
1337                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1338                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1339         seq_printf(m, "\nSetInfos: %d total %d failed",
1340                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1341                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1342         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1343                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1344                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1345 }
1346
1347 static void
1348 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1349 {
1350         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1351         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1352
1353         cfile->fid.persistent_fid = fid->persistent_fid;
1354         cfile->fid.volatile_fid = fid->volatile_fid;
1355         cfile->fid.access = fid->access;
1356 #ifdef CONFIG_CIFS_DEBUG2
1357         cfile->fid.mid = fid->mid;
1358 #endif /* CIFS_DEBUG2 */
1359         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1360                                       &fid->purge_cache);
1361         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1362         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1363 }
1364
1365 static void
1366 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1367                 struct cifs_fid *fid)
1368 {
1369         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1370 }
1371
1372 static void
1373 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1374                    struct cifsFileInfo *cfile)
1375 {
1376         struct smb2_file_network_open_info file_inf;
1377         struct inode *inode;
1378         int rc;
1379
1380         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1381                    cfile->fid.volatile_fid, &file_inf);
1382         if (rc)
1383                 return;
1384
1385         inode = d_inode(cfile->dentry);
1386
1387         spin_lock(&inode->i_lock);
1388         CIFS_I(inode)->time = jiffies;
1389
1390         /* Creation time should not need to be updated on close */
1391         if (file_inf.LastWriteTime)
1392                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1393         if (file_inf.ChangeTime)
1394                 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1395         if (file_inf.LastAccessTime)
1396                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1397
1398         /*
1399          * i_blocks is not related to (i_size / i_blksize),
1400          * but instead 512 byte (2**9) size is required for
1401          * calculating num blocks.
1402          */
1403         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1404                 inode->i_blocks =
1405                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1406
1407         /* End of file and Attributes should not have to be updated on close */
1408         spin_unlock(&inode->i_lock);
1409 }
1410
1411 static int
1412 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1413                      u64 persistent_fid, u64 volatile_fid,
1414                      struct copychunk_ioctl *pcchunk)
1415 {
1416         int rc;
1417         unsigned int ret_data_len;
1418         struct resume_key_req *res_key;
1419
1420         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1421                         FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1422                         CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1423
1424         if (rc == -EOPNOTSUPP) {
1425                 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1426                 goto req_res_key_exit;
1427         } else if (rc) {
1428                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1429                 goto req_res_key_exit;
1430         }
1431         if (ret_data_len < sizeof(struct resume_key_req)) {
1432                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1433                 rc = -EINVAL;
1434                 goto req_res_key_exit;
1435         }
1436         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1437
1438 req_res_key_exit:
1439         kfree(res_key);
1440         return rc;
1441 }
1442
1443 struct iqi_vars {
1444         struct smb_rqst rqst[3];
1445         struct kvec rsp_iov[3];
1446         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1447         struct kvec qi_iov[1];
1448         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1449         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1450         struct kvec close_iov[1];
1451 };
1452
1453 static int
1454 smb2_ioctl_query_info(const unsigned int xid,
1455                       struct cifs_tcon *tcon,
1456                       struct cifs_sb_info *cifs_sb,
1457                       __le16 *path, int is_dir,
1458                       unsigned long p)
1459 {
1460         struct iqi_vars *vars;
1461         struct smb_rqst *rqst;
1462         struct kvec *rsp_iov;
1463         struct cifs_ses *ses = tcon->ses;
1464         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1465         char __user *arg = (char __user *)p;
1466         struct smb_query_info qi;
1467         struct smb_query_info __user *pqi;
1468         int rc = 0;
1469         int flags = CIFS_CP_CREATE_CLOSE_OP;
1470         struct smb2_query_info_rsp *qi_rsp = NULL;
1471         struct smb2_ioctl_rsp *io_rsp = NULL;
1472         void *buffer = NULL;
1473         int resp_buftype[3];
1474         struct cifs_open_parms oparms;
1475         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1476         struct cifs_fid fid;
1477         unsigned int size[2];
1478         void *data[2];
1479         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1480         void (*free_req1_func)(struct smb_rqst *r);
1481
1482         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1483         if (vars == NULL)
1484                 return -ENOMEM;
1485         rqst = &vars->rqst[0];
1486         rsp_iov = &vars->rsp_iov[0];
1487
1488         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1489
1490         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1491                 rc = -EFAULT;
1492                 goto free_vars;
1493         }
1494         if (qi.output_buffer_length > 1024) {
1495                 rc = -EINVAL;
1496                 goto free_vars;
1497         }
1498
1499         if (!ses || !server) {
1500                 rc = -EIO;
1501                 goto free_vars;
1502         }
1503
1504         if (smb3_encryption_required(tcon))
1505                 flags |= CIFS_TRANSFORM_REQ;
1506
1507         if (qi.output_buffer_length) {
1508                 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1509                 if (IS_ERR(buffer)) {
1510                         rc = PTR_ERR(buffer);
1511                         goto free_vars;
1512                 }
1513         }
1514
1515         /* Open */
1516         rqst[0].rq_iov = &vars->open_iov[0];
1517         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1518
1519         oparms = (struct cifs_open_parms) {
1520                 .tcon = tcon,
1521                 .disposition = FILE_OPEN,
1522                 .create_options = cifs_create_options(cifs_sb, create_options),
1523                 .fid = &fid,
1524         };
1525
1526         if (qi.flags & PASSTHRU_FSCTL) {
1527                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1528                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1529                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1530                         break;
1531                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1532                         oparms.desired_access = GENERIC_ALL;
1533                         break;
1534                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1535                         oparms.desired_access = GENERIC_READ;
1536                         break;
1537                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1538                         oparms.desired_access = GENERIC_WRITE;
1539                         break;
1540                 }
1541         } else if (qi.flags & PASSTHRU_SET_INFO) {
1542                 oparms.desired_access = GENERIC_WRITE;
1543         } else {
1544                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1545         }
1546
1547         rc = SMB2_open_init(tcon, server,
1548                             &rqst[0], &oplock, &oparms, path);
1549         if (rc)
1550                 goto free_output_buffer;
1551         smb2_set_next_command(tcon, &rqst[0]);
1552
1553         /* Query */
1554         if (qi.flags & PASSTHRU_FSCTL) {
1555                 /* Can eventually relax perm check since server enforces too */
1556                 if (!capable(CAP_SYS_ADMIN)) {
1557                         rc = -EPERM;
1558                         goto free_open_req;
1559                 }
1560                 rqst[1].rq_iov = &vars->io_iov[0];
1561                 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1562
1563                 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1564                                      qi.info_type, buffer, qi.output_buffer_length,
1565                                      CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1566                                      MAX_SMB2_CLOSE_RESPONSE_SIZE);
1567                 free_req1_func = SMB2_ioctl_free;
1568         } else if (qi.flags == PASSTHRU_SET_INFO) {
1569                 /* Can eventually relax perm check since server enforces too */
1570                 if (!capable(CAP_SYS_ADMIN)) {
1571                         rc = -EPERM;
1572                         goto free_open_req;
1573                 }
1574                 if (qi.output_buffer_length < 8) {
1575                         rc = -EINVAL;
1576                         goto free_open_req;
1577                 }
1578                 rqst[1].rq_iov = &vars->si_iov[0];
1579                 rqst[1].rq_nvec = 1;
1580
1581                 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1582                 size[0] = 8;
1583                 data[0] = buffer;
1584
1585                 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1586                                         current->tgid, FILE_END_OF_FILE_INFORMATION,
1587                                         SMB2_O_INFO_FILE, 0, data, size);
1588                 free_req1_func = SMB2_set_info_free;
1589         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1590                 rqst[1].rq_iov = &vars->qi_iov[0];
1591                 rqst[1].rq_nvec = 1;
1592
1593                 rc = SMB2_query_info_init(tcon, server,
1594                                   &rqst[1], COMPOUND_FID,
1595                                   COMPOUND_FID, qi.file_info_class,
1596                                   qi.info_type, qi.additional_information,
1597                                   qi.input_buffer_length,
1598                                   qi.output_buffer_length, buffer);
1599                 free_req1_func = SMB2_query_info_free;
1600         } else { /* unknown flags */
1601                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1602                               qi.flags);
1603                 rc = -EINVAL;
1604         }
1605
1606         if (rc)
1607                 goto free_open_req;
1608         smb2_set_next_command(tcon, &rqst[1]);
1609         smb2_set_related(&rqst[1]);
1610
1611         /* Close */
1612         rqst[2].rq_iov = &vars->close_iov[0];
1613         rqst[2].rq_nvec = 1;
1614
1615         rc = SMB2_close_init(tcon, server,
1616                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1617         if (rc)
1618                 goto free_req_1;
1619         smb2_set_related(&rqst[2]);
1620
1621         rc = compound_send_recv(xid, ses, server,
1622                                 flags, 3, rqst,
1623                                 resp_buftype, rsp_iov);
1624         if (rc)
1625                 goto out;
1626
1627         /* No need to bump num_remote_opens since handle immediately closed */
1628         if (qi.flags & PASSTHRU_FSCTL) {
1629                 pqi = (struct smb_query_info __user *)arg;
1630                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1631                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1632                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1633                 if (qi.input_buffer_length > 0 &&
1634                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1635                     > rsp_iov[1].iov_len) {
1636                         rc = -EFAULT;
1637                         goto out;
1638                 }
1639
1640                 if (copy_to_user(&pqi->input_buffer_length,
1641                                  &qi.input_buffer_length,
1642                                  sizeof(qi.input_buffer_length))) {
1643                         rc = -EFAULT;
1644                         goto out;
1645                 }
1646
1647                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1648                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1649                                  qi.input_buffer_length))
1650                         rc = -EFAULT;
1651         } else {
1652                 pqi = (struct smb_query_info __user *)arg;
1653                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1654                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1655                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1656                 if (copy_to_user(&pqi->input_buffer_length,
1657                                  &qi.input_buffer_length,
1658                                  sizeof(qi.input_buffer_length))) {
1659                         rc = -EFAULT;
1660                         goto out;
1661                 }
1662
1663                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1664                                  qi.input_buffer_length))
1665                         rc = -EFAULT;
1666         }
1667
1668 out:
1669         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1670         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1671         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1672         SMB2_close_free(&rqst[2]);
1673 free_req_1:
1674         free_req1_func(&rqst[1]);
1675 free_open_req:
1676         SMB2_open_free(&rqst[0]);
1677 free_output_buffer:
1678         kfree(buffer);
1679 free_vars:
1680         kfree(vars);
1681         return rc;
1682 }
1683
1684 static ssize_t
1685 smb2_copychunk_range(const unsigned int xid,
1686                         struct cifsFileInfo *srcfile,
1687                         struct cifsFileInfo *trgtfile, u64 src_off,
1688                         u64 len, u64 dest_off)
1689 {
1690         int rc;
1691         unsigned int ret_data_len;
1692         struct copychunk_ioctl *pcchunk;
1693         struct copychunk_ioctl_rsp *retbuf = NULL;
1694         struct cifs_tcon *tcon;
1695         int chunks_copied = 0;
1696         bool chunk_sizes_updated = false;
1697         ssize_t bytes_written, total_bytes_written = 0;
1698
1699         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1700         if (pcchunk == NULL)
1701                 return -ENOMEM;
1702
1703         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1704         /* Request a key from the server to identify the source of the copy */
1705         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1706                                 srcfile->fid.persistent_fid,
1707                                 srcfile->fid.volatile_fid, pcchunk);
1708
1709         /* Note: request_res_key sets res_key null only if rc !=0 */
1710         if (rc)
1711                 goto cchunk_out;
1712
1713         /* For now array only one chunk long, will make more flexible later */
1714         pcchunk->ChunkCount = cpu_to_le32(1);
1715         pcchunk->Reserved = 0;
1716         pcchunk->Reserved2 = 0;
1717
1718         tcon = tlink_tcon(trgtfile->tlink);
1719
1720         while (len > 0) {
1721                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1722                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1723                 pcchunk->Length =
1724                         cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1725
1726                 /* Request server copy to target from src identified by key */
1727                 kfree(retbuf);
1728                 retbuf = NULL;
1729                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1730                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1731                         (char *)pcchunk, sizeof(struct copychunk_ioctl),
1732                         CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1733                 if (rc == 0) {
1734                         if (ret_data_len !=
1735                                         sizeof(struct copychunk_ioctl_rsp)) {
1736                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1737                                 rc = -EIO;
1738                                 goto cchunk_out;
1739                         }
1740                         if (retbuf->TotalBytesWritten == 0) {
1741                                 cifs_dbg(FYI, "no bytes copied\n");
1742                                 rc = -EIO;
1743                                 goto cchunk_out;
1744                         }
1745                         /*
1746                          * Check if server claimed to write more than we asked
1747                          */
1748                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1749                             le32_to_cpu(pcchunk->Length)) {
1750                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1751                                 rc = -EIO;
1752                                 goto cchunk_out;
1753                         }
1754                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1755                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1756                                 rc = -EIO;
1757                                 goto cchunk_out;
1758                         }
1759                         chunks_copied++;
1760
1761                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1762                         src_off += bytes_written;
1763                         dest_off += bytes_written;
1764                         len -= bytes_written;
1765                         total_bytes_written += bytes_written;
1766
1767                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1768                                 le32_to_cpu(retbuf->ChunksWritten),
1769                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1770                                 bytes_written);
1771                 } else if (rc == -EINVAL) {
1772                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1773                                 goto cchunk_out;
1774
1775                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1776                                 le32_to_cpu(retbuf->ChunksWritten),
1777                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1778                                 le32_to_cpu(retbuf->TotalBytesWritten));
1779
1780                         /*
1781                          * Check if this is the first request using these sizes,
1782                          * (ie check if copy succeed once with original sizes
1783                          * and check if the server gave us different sizes after
1784                          * we already updated max sizes on previous request).
1785                          * if not then why is the server returning an error now
1786                          */
1787                         if ((chunks_copied != 0) || chunk_sizes_updated)
1788                                 goto cchunk_out;
1789
1790                         /* Check that server is not asking us to grow size */
1791                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1792                                         tcon->max_bytes_chunk)
1793                                 tcon->max_bytes_chunk =
1794                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1795                         else
1796                                 goto cchunk_out; /* server gave us bogus size */
1797
1798                         /* No need to change MaxChunks since already set to 1 */
1799                         chunk_sizes_updated = true;
1800                 } else
1801                         goto cchunk_out;
1802         }
1803
1804 cchunk_out:
1805         kfree(pcchunk);
1806         kfree(retbuf);
1807         if (rc)
1808                 return rc;
1809         else
1810                 return total_bytes_written;
1811 }
1812
1813 static int
1814 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1815                 struct cifs_fid *fid)
1816 {
1817         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1818 }
1819
1820 static unsigned int
1821 smb2_read_data_offset(char *buf)
1822 {
1823         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1824
1825         return rsp->DataOffset;
1826 }
1827
1828 static unsigned int
1829 smb2_read_data_length(char *buf, bool in_remaining)
1830 {
1831         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1832
1833         if (in_remaining)
1834                 return le32_to_cpu(rsp->DataRemaining);
1835
1836         return le32_to_cpu(rsp->DataLength);
1837 }
1838
1839
1840 static int
1841 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1842                struct cifs_io_parms *parms, unsigned int *bytes_read,
1843                char **buf, int *buf_type)
1844 {
1845         parms->persistent_fid = pfid->persistent_fid;
1846         parms->volatile_fid = pfid->volatile_fid;
1847         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1848 }
1849
1850 static int
1851 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1852                 struct cifs_io_parms *parms, unsigned int *written,
1853                 struct kvec *iov, unsigned long nr_segs)
1854 {
1855
1856         parms->persistent_fid = pfid->persistent_fid;
1857         parms->volatile_fid = pfid->volatile_fid;
1858         return SMB2_write(xid, parms, written, iov, nr_segs);
1859 }
1860
1861 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1862 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1863                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1864 {
1865         struct cifsInodeInfo *cifsi;
1866         int rc;
1867
1868         cifsi = CIFS_I(inode);
1869
1870         /* if file already sparse don't bother setting sparse again */
1871         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1872                 return true; /* already sparse */
1873
1874         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1875                 return true; /* already not sparse */
1876
1877         /*
1878          * Can't check for sparse support on share the usual way via the
1879          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1880          * since Samba server doesn't set the flag on the share, yet
1881          * supports the set sparse FSCTL and returns sparse correctly
1882          * in the file attributes. If we fail setting sparse though we
1883          * mark that server does not support sparse files for this share
1884          * to avoid repeatedly sending the unsupported fsctl to server
1885          * if the file is repeatedly extended.
1886          */
1887         if (tcon->broken_sparse_sup)
1888                 return false;
1889
1890         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1891                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1892                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1893         if (rc) {
1894                 tcon->broken_sparse_sup = true;
1895                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1896                 return false;
1897         }
1898
1899         if (setsparse)
1900                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1901         else
1902                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1903
1904         return true;
1905 }
1906
1907 static int
1908 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1909                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1910 {
1911         __le64 eof = cpu_to_le64(size);
1912         struct inode *inode;
1913
1914         /*
1915          * If extending file more than one page make sparse. Many Linux fs
1916          * make files sparse by default when extending via ftruncate
1917          */
1918         inode = d_inode(cfile->dentry);
1919
1920         if (!set_alloc && (size > inode->i_size + 8192)) {
1921                 __u8 set_sparse = 1;
1922
1923                 /* whether set sparse succeeds or not, extend the file */
1924                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1925         }
1926
1927         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1928                             cfile->fid.volatile_fid, cfile->pid, &eof);
1929 }
1930
1931 static int
1932 smb2_duplicate_extents(const unsigned int xid,
1933                         struct cifsFileInfo *srcfile,
1934                         struct cifsFileInfo *trgtfile, u64 src_off,
1935                         u64 len, u64 dest_off)
1936 {
1937         int rc;
1938         unsigned int ret_data_len;
1939         struct inode *inode;
1940         struct duplicate_extents_to_file dup_ext_buf;
1941         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1942
1943         /* server fileays advertise duplicate extent support with this flag */
1944         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1945              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1946                 return -EOPNOTSUPP;
1947
1948         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1949         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1950         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1951         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1952         dup_ext_buf.ByteCount = cpu_to_le64(len);
1953         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1954                 src_off, dest_off, len);
1955
1956         inode = d_inode(trgtfile->dentry);
1957         if (inode->i_size < dest_off + len) {
1958                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1959                 if (rc)
1960                         goto duplicate_extents_out;
1961
1962                 /*
1963                  * Although also could set plausible allocation size (i_blocks)
1964                  * here in addition to setting the file size, in reflink
1965                  * it is likely that the target file is sparse. Its allocation
1966                  * size will be queried on next revalidate, but it is important
1967                  * to make sure that file's cached size is updated immediately
1968                  */
1969                 cifs_setsize(inode, dest_off + len);
1970         }
1971         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1972                         trgtfile->fid.volatile_fid,
1973                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1974                         (char *)&dup_ext_buf,
1975                         sizeof(struct duplicate_extents_to_file),
1976                         CIFSMaxBufSize, NULL,
1977                         &ret_data_len);
1978
1979         if (ret_data_len > 0)
1980                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1981
1982 duplicate_extents_out:
1983         return rc;
1984 }
1985
1986 static int
1987 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1988                    struct cifsFileInfo *cfile)
1989 {
1990         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1991                             cfile->fid.volatile_fid);
1992 }
1993
1994 static int
1995 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1996                    struct cifsFileInfo *cfile)
1997 {
1998         struct fsctl_set_integrity_information_req integr_info;
1999         unsigned int ret_data_len;
2000
2001         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2002         integr_info.Flags = 0;
2003         integr_info.Reserved = 0;
2004
2005         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2006                         cfile->fid.volatile_fid,
2007                         FSCTL_SET_INTEGRITY_INFORMATION,
2008                         (char *)&integr_info,
2009                         sizeof(struct fsctl_set_integrity_information_req),
2010                         CIFSMaxBufSize, NULL,
2011                         &ret_data_len);
2012
2013 }
2014
2015 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2016 #define GMT_TOKEN_SIZE 50
2017
2018 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2019
2020 /*
2021  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2022  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2023  */
2024 static int
2025 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2026                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2027 {
2028         char *retbuf = NULL;
2029         unsigned int ret_data_len = 0;
2030         int rc;
2031         u32 max_response_size;
2032         struct smb_snapshot_array snapshot_in;
2033
2034         /*
2035          * On the first query to enumerate the list of snapshots available
2036          * for this volume the buffer begins with 0 (number of snapshots
2037          * which can be returned is zero since at that point we do not know
2038          * how big the buffer needs to be). On the second query,
2039          * it (ret_data_len) is set to number of snapshots so we can
2040          * know to set the maximum response size larger (see below).
2041          */
2042         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2043                 return -EFAULT;
2044
2045         /*
2046          * Note that for snapshot queries that servers like Azure expect that
2047          * the first query be minimal size (and just used to get the number/size
2048          * of previous versions) so response size must be specified as EXACTLY
2049          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2050          * of eight bytes.
2051          */
2052         if (ret_data_len == 0)
2053                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2054         else
2055                 max_response_size = CIFSMaxBufSize;
2056
2057         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2058                         cfile->fid.volatile_fid,
2059                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2060                         NULL, 0 /* no input data */, max_response_size,
2061                         (char **)&retbuf,
2062                         &ret_data_len);
2063         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2064                         rc, ret_data_len);
2065         if (rc)
2066                 return rc;
2067
2068         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2069                 /* Fixup buffer */
2070                 if (copy_from_user(&snapshot_in, ioc_buf,
2071                     sizeof(struct smb_snapshot_array))) {
2072                         rc = -EFAULT;
2073                         kfree(retbuf);
2074                         return rc;
2075                 }
2076
2077                 /*
2078                  * Check for min size, ie not large enough to fit even one GMT
2079                  * token (snapshot).  On the first ioctl some users may pass in
2080                  * smaller size (or zero) to simply get the size of the array
2081                  * so the user space caller can allocate sufficient memory
2082                  * and retry the ioctl again with larger array size sufficient
2083                  * to hold all of the snapshot GMT tokens on the second try.
2084                  */
2085                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2086                         ret_data_len = sizeof(struct smb_snapshot_array);
2087
2088                 /*
2089                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2090                  * the snapshot array (of 50 byte GMT tokens) each
2091                  * representing an available previous version of the data
2092                  */
2093                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2094                                         sizeof(struct smb_snapshot_array)))
2095                         ret_data_len = snapshot_in.snapshot_array_size +
2096                                         sizeof(struct smb_snapshot_array);
2097
2098                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2099                         rc = -EFAULT;
2100         }
2101
2102         kfree(retbuf);
2103         return rc;
2104 }
2105
2106
2107
2108 static int
2109 smb3_notify(const unsigned int xid, struct file *pfile,
2110             void __user *ioc_buf, bool return_changes)
2111 {
2112         struct smb3_notify_info notify;
2113         struct smb3_notify_info __user *pnotify_buf;
2114         struct dentry *dentry = pfile->f_path.dentry;
2115         struct inode *inode = file_inode(pfile);
2116         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2117         struct cifs_open_parms oparms;
2118         struct cifs_fid fid;
2119         struct cifs_tcon *tcon;
2120         const unsigned char *path;
2121         char *returned_ioctl_info = NULL;
2122         void *page = alloc_dentry_path();
2123         __le16 *utf16_path = NULL;
2124         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2125         int rc = 0;
2126         __u32 ret_len = 0;
2127
2128         path = build_path_from_dentry(dentry, page);
2129         if (IS_ERR(path)) {
2130                 rc = PTR_ERR(path);
2131                 goto notify_exit;
2132         }
2133
2134         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2135         if (utf16_path == NULL) {
2136                 rc = -ENOMEM;
2137                 goto notify_exit;
2138         }
2139
2140         if (return_changes) {
2141                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2142                         rc = -EFAULT;
2143                         goto notify_exit;
2144                 }
2145         } else {
2146                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2147                         rc = -EFAULT;
2148                         goto notify_exit;
2149                 }
2150                 notify.data_len = 0;
2151         }
2152
2153         tcon = cifs_sb_master_tcon(cifs_sb);
2154         oparms = (struct cifs_open_parms) {
2155                 .tcon = tcon,
2156                 .path = path,
2157                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2158                 .disposition = FILE_OPEN,
2159                 .create_options = cifs_create_options(cifs_sb, 0),
2160                 .fid = &fid,
2161         };
2162
2163         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2164                        NULL);
2165         if (rc)
2166                 goto notify_exit;
2167
2168         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2169                                 notify.watch_tree, notify.completion_filter,
2170                                 notify.data_len, &returned_ioctl_info, &ret_len);
2171
2172         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2173
2174         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2175         if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2176                 if (ret_len > notify.data_len)
2177                         ret_len = notify.data_len;
2178                 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2179                 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2180                         rc = -EFAULT;
2181                 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2182                         rc = -EFAULT;
2183         }
2184         kfree(returned_ioctl_info);
2185 notify_exit:
2186         free_dentry_path(page);
2187         kfree(utf16_path);
2188         return rc;
2189 }
2190
2191 static int
2192 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2193                      const char *path, struct cifs_sb_info *cifs_sb,
2194                      struct cifs_fid *fid, __u16 search_flags,
2195                      struct cifs_search_info *srch_inf)
2196 {
2197         __le16 *utf16_path;
2198         struct smb_rqst rqst[2];
2199         struct kvec rsp_iov[2];
2200         int resp_buftype[2];
2201         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2202         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2203         int rc, flags = 0;
2204         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2205         struct cifs_open_parms oparms;
2206         struct smb2_query_directory_rsp *qd_rsp = NULL;
2207         struct smb2_create_rsp *op_rsp = NULL;
2208         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2209         int retry_count = 0;
2210
2211         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2212         if (!utf16_path)
2213                 return -ENOMEM;
2214
2215         if (smb3_encryption_required(tcon))
2216                 flags |= CIFS_TRANSFORM_REQ;
2217
2218         memset(rqst, 0, sizeof(rqst));
2219         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2220         memset(rsp_iov, 0, sizeof(rsp_iov));
2221
2222         /* Open */
2223         memset(&open_iov, 0, sizeof(open_iov));
2224         rqst[0].rq_iov = open_iov;
2225         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2226
2227         oparms = (struct cifs_open_parms) {
2228                 .tcon = tcon,
2229                 .path = path,
2230                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2231                 .disposition = FILE_OPEN,
2232                 .create_options = cifs_create_options(cifs_sb, 0),
2233                 .fid = fid,
2234         };
2235
2236         rc = SMB2_open_init(tcon, server,
2237                             &rqst[0], &oplock, &oparms, utf16_path);
2238         if (rc)
2239                 goto qdf_free;
2240         smb2_set_next_command(tcon, &rqst[0]);
2241
2242         /* Query directory */
2243         srch_inf->entries_in_buffer = 0;
2244         srch_inf->index_of_last_entry = 2;
2245
2246         memset(&qd_iov, 0, sizeof(qd_iov));
2247         rqst[1].rq_iov = qd_iov;
2248         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2249
2250         rc = SMB2_query_directory_init(xid, tcon, server,
2251                                        &rqst[1],
2252                                        COMPOUND_FID, COMPOUND_FID,
2253                                        0, srch_inf->info_level);
2254         if (rc)
2255                 goto qdf_free;
2256
2257         smb2_set_related(&rqst[1]);
2258
2259 again:
2260         rc = compound_send_recv(xid, tcon->ses, server,
2261                                 flags, 2, rqst,
2262                                 resp_buftype, rsp_iov);
2263
2264         if (rc == -EAGAIN && retry_count++ < 10)
2265                 goto again;
2266
2267         /* If the open failed there is nothing to do */
2268         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2269         if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2270                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2271                 goto qdf_free;
2272         }
2273         fid->persistent_fid = op_rsp->PersistentFileId;
2274         fid->volatile_fid = op_rsp->VolatileFileId;
2275
2276         /* Anything else than ENODATA means a genuine error */
2277         if (rc && rc != -ENODATA) {
2278                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2279                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2280                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2281                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2282                 goto qdf_free;
2283         }
2284
2285         atomic_inc(&tcon->num_remote_opens);
2286
2287         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2288         if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2289                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2290                                           tcon->tid, tcon->ses->Suid, 0, 0);
2291                 srch_inf->endOfSearch = true;
2292                 rc = 0;
2293                 goto qdf_free;
2294         }
2295
2296         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2297                                         srch_inf);
2298         if (rc) {
2299                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2300                         tcon->ses->Suid, 0, 0, rc);
2301                 goto qdf_free;
2302         }
2303         resp_buftype[1] = CIFS_NO_BUFFER;
2304
2305         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2306                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2307
2308  qdf_free:
2309         kfree(utf16_path);
2310         SMB2_open_free(&rqst[0]);
2311         SMB2_query_directory_free(&rqst[1]);
2312         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2313         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2314         return rc;
2315 }
2316
2317 static int
2318 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2319                     struct cifs_fid *fid, __u16 search_flags,
2320                     struct cifs_search_info *srch_inf)
2321 {
2322         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2323                                     fid->volatile_fid, 0, srch_inf);
2324 }
2325
2326 static int
2327 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2328                struct cifs_fid *fid)
2329 {
2330         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2331 }
2332
2333 /*
2334  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2335  * the number of credits and return true. Otherwise - return false.
2336  */
2337 static bool
2338 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2339 {
2340         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2341         int scredits, in_flight;
2342
2343         if (shdr->Status != STATUS_PENDING)
2344                 return false;
2345
2346         if (shdr->CreditRequest) {
2347                 spin_lock(&server->req_lock);
2348                 server->credits += le16_to_cpu(shdr->CreditRequest);
2349                 scredits = server->credits;
2350                 in_flight = server->in_flight;
2351                 spin_unlock(&server->req_lock);
2352                 wake_up(&server->request_q);
2353
2354                 trace_smb3_pend_credits(server->CurrentMid,
2355                                 server->conn_id, server->hostname, scredits,
2356                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2357                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2358                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2359         }
2360
2361         return true;
2362 }
2363
2364 static bool
2365 smb2_is_session_expired(char *buf)
2366 {
2367         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2368
2369         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2370             shdr->Status != STATUS_USER_SESSION_DELETED)
2371                 return false;
2372
2373         trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2374                                le64_to_cpu(shdr->SessionId),
2375                                le16_to_cpu(shdr->Command),
2376                                le64_to_cpu(shdr->MessageId));
2377         cifs_dbg(FYI, "Session expired or deleted\n");
2378
2379         return true;
2380 }
2381
2382 static bool
2383 smb2_is_status_io_timeout(char *buf)
2384 {
2385         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2386
2387         if (shdr->Status == STATUS_IO_TIMEOUT)
2388                 return true;
2389         else
2390                 return false;
2391 }
2392
2393 static void
2394 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2395 {
2396         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2397         struct TCP_Server_Info *pserver;
2398         struct cifs_ses *ses;
2399         struct cifs_tcon *tcon;
2400
2401         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2402                 return;
2403
2404         /* If server is a channel, select the primary channel */
2405         pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
2406
2407         spin_lock(&cifs_tcp_ses_lock);
2408         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2409                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2410                         if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2411                                 spin_lock(&tcon->tc_lock);
2412                                 tcon->need_reconnect = true;
2413                                 spin_unlock(&tcon->tc_lock);
2414                                 spin_unlock(&cifs_tcp_ses_lock);
2415                                 pr_warn_once("Server share %s deleted.\n",
2416                                              tcon->tree_name);
2417                                 return;
2418                         }
2419                 }
2420         }
2421         spin_unlock(&cifs_tcp_ses_lock);
2422 }
2423
2424 static int
2425 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2426                 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2427 {
2428         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2429                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2430                                         smb2_get_lease_state(cinode));
2431
2432         return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2433                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2434 }
2435
2436 void
2437 smb2_set_related(struct smb_rqst *rqst)
2438 {
2439         struct smb2_hdr *shdr;
2440
2441         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2442         if (shdr == NULL) {
2443                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2444                 return;
2445         }
2446         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2447 }
2448
2449 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2450
2451 void
2452 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2453 {
2454         struct smb2_hdr *shdr;
2455         struct cifs_ses *ses = tcon->ses;
2456         struct TCP_Server_Info *server = ses->server;
2457         unsigned long len = smb_rqst_len(server, rqst);
2458         int i, num_padding;
2459
2460         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2461         if (shdr == NULL) {
2462                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2463                 return;
2464         }
2465
2466         /* SMB headers in a compound are 8 byte aligned. */
2467
2468         /* No padding needed */
2469         if (!(len & 7))
2470                 goto finished;
2471
2472         num_padding = 8 - (len & 7);
2473         if (!smb3_encryption_required(tcon)) {
2474                 /*
2475                  * If we do not have encryption then we can just add an extra
2476                  * iov for the padding.
2477                  */
2478                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2479                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2480                 rqst->rq_nvec++;
2481                 len += num_padding;
2482         } else {
2483                 /*
2484                  * We can not add a small padding iov for the encryption case
2485                  * because the encryption framework can not handle the padding
2486                  * iovs.
2487                  * We have to flatten this into a single buffer and add
2488                  * the padding to it.
2489                  */
2490                 for (i = 1; i < rqst->rq_nvec; i++) {
2491                         memcpy(rqst->rq_iov[0].iov_base +
2492                                rqst->rq_iov[0].iov_len,
2493                                rqst->rq_iov[i].iov_base,
2494                                rqst->rq_iov[i].iov_len);
2495                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2496                 }
2497                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2498                        0, num_padding);
2499                 rqst->rq_iov[0].iov_len += num_padding;
2500                 len += num_padding;
2501                 rqst->rq_nvec = 1;
2502         }
2503
2504  finished:
2505         shdr->NextCommand = cpu_to_le32(len);
2506 }
2507
2508 /*
2509  * Passes the query info response back to the caller on success.
2510  * Caller need to free this with free_rsp_buf().
2511  */
2512 int
2513 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2514                          const char *path, u32 desired_access,
2515                          u32 class, u32 type, u32 output_len,
2516                          struct kvec *rsp, int *buftype,
2517                          struct cifs_sb_info *cifs_sb)
2518 {
2519         struct cifs_ses *ses = tcon->ses;
2520         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2521         int flags = CIFS_CP_CREATE_CLOSE_OP;
2522         struct smb_rqst rqst[3];
2523         int resp_buftype[3];
2524         struct kvec rsp_iov[3];
2525         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2526         struct kvec qi_iov[1];
2527         struct kvec close_iov[1];
2528         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2529         struct cifs_open_parms oparms;
2530         struct cifs_fid fid;
2531         int rc;
2532         __le16 *utf16_path;
2533         struct cached_fid *cfid = NULL;
2534
2535         if (!path)
2536                 path = "";
2537         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2538         if (!utf16_path)
2539                 return -ENOMEM;
2540
2541         if (smb3_encryption_required(tcon))
2542                 flags |= CIFS_TRANSFORM_REQ;
2543
2544         memset(rqst, 0, sizeof(rqst));
2545         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2546         memset(rsp_iov, 0, sizeof(rsp_iov));
2547
2548         /*
2549          * We can only call this for things we know are directories.
2550          */
2551         if (!strcmp(path, ""))
2552                 open_cached_dir(xid, tcon, path, cifs_sb, false,
2553                                 &cfid); /* cfid null if open dir failed */
2554
2555         memset(&open_iov, 0, sizeof(open_iov));
2556         rqst[0].rq_iov = open_iov;
2557         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2558
2559         oparms = (struct cifs_open_parms) {
2560                 .tcon = tcon,
2561                 .path = path,
2562                 .desired_access = desired_access,
2563                 .disposition = FILE_OPEN,
2564                 .create_options = cifs_create_options(cifs_sb, 0),
2565                 .fid = &fid,
2566         };
2567
2568         rc = SMB2_open_init(tcon, server,
2569                             &rqst[0], &oplock, &oparms, utf16_path);
2570         if (rc)
2571                 goto qic_exit;
2572         smb2_set_next_command(tcon, &rqst[0]);
2573
2574         memset(&qi_iov, 0, sizeof(qi_iov));
2575         rqst[1].rq_iov = qi_iov;
2576         rqst[1].rq_nvec = 1;
2577
2578         if (cfid) {
2579                 rc = SMB2_query_info_init(tcon, server,
2580                                           &rqst[1],
2581                                           cfid->fid.persistent_fid,
2582                                           cfid->fid.volatile_fid,
2583                                           class, type, 0,
2584                                           output_len, 0,
2585                                           NULL);
2586         } else {
2587                 rc = SMB2_query_info_init(tcon, server,
2588                                           &rqst[1],
2589                                           COMPOUND_FID,
2590                                           COMPOUND_FID,
2591                                           class, type, 0,
2592                                           output_len, 0,
2593                                           NULL);
2594         }
2595         if (rc)
2596                 goto qic_exit;
2597         if (!cfid) {
2598                 smb2_set_next_command(tcon, &rqst[1]);
2599                 smb2_set_related(&rqst[1]);
2600         }
2601
2602         memset(&close_iov, 0, sizeof(close_iov));
2603         rqst[2].rq_iov = close_iov;
2604         rqst[2].rq_nvec = 1;
2605
2606         rc = SMB2_close_init(tcon, server,
2607                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2608         if (rc)
2609                 goto qic_exit;
2610         smb2_set_related(&rqst[2]);
2611
2612         if (cfid) {
2613                 rc = compound_send_recv(xid, ses, server,
2614                                         flags, 1, &rqst[1],
2615                                         &resp_buftype[1], &rsp_iov[1]);
2616         } else {
2617                 rc = compound_send_recv(xid, ses, server,
2618                                         flags, 3, rqst,
2619                                         resp_buftype, rsp_iov);
2620         }
2621         if (rc) {
2622                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2623                 if (rc == -EREMCHG) {
2624                         tcon->need_reconnect = true;
2625                         pr_warn_once("server share %s deleted\n",
2626                                      tcon->tree_name);
2627                 }
2628                 goto qic_exit;
2629         }
2630         *rsp = rsp_iov[1];
2631         *buftype = resp_buftype[1];
2632
2633  qic_exit:
2634         kfree(utf16_path);
2635         SMB2_open_free(&rqst[0]);
2636         SMB2_query_info_free(&rqst[1]);
2637         SMB2_close_free(&rqst[2]);
2638         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2639         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2640         if (cfid)
2641                 close_cached_dir(cfid);
2642         return rc;
2643 }
2644
2645 static int
2646 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2647              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2648 {
2649         struct smb2_query_info_rsp *rsp;
2650         struct smb2_fs_full_size_info *info = NULL;
2651         struct kvec rsp_iov = {NULL, 0};
2652         int buftype = CIFS_NO_BUFFER;
2653         int rc;
2654
2655
2656         rc = smb2_query_info_compound(xid, tcon, "",
2657                                       FILE_READ_ATTRIBUTES,
2658                                       FS_FULL_SIZE_INFORMATION,
2659                                       SMB2_O_INFO_FILESYSTEM,
2660                                       sizeof(struct smb2_fs_full_size_info),
2661                                       &rsp_iov, &buftype, cifs_sb);
2662         if (rc)
2663                 goto qfs_exit;
2664
2665         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2666         buf->f_type = SMB2_SUPER_MAGIC;
2667         info = (struct smb2_fs_full_size_info *)(
2668                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2669         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2670                                le32_to_cpu(rsp->OutputBufferLength),
2671                                &rsp_iov,
2672                                sizeof(struct smb2_fs_full_size_info));
2673         if (!rc)
2674                 smb2_copy_fs_info_to_kstatfs(info, buf);
2675
2676 qfs_exit:
2677         free_rsp_buf(buftype, rsp_iov.iov_base);
2678         return rc;
2679 }
2680
2681 static int
2682 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2683                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2684 {
2685         int rc;
2686         __le16 srch_path = 0; /* Null - open root of share */
2687         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2688         struct cifs_open_parms oparms;
2689         struct cifs_fid fid;
2690
2691         if (!tcon->posix_extensions)
2692                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2693
2694         oparms = (struct cifs_open_parms) {
2695                 .tcon = tcon,
2696                 .path = "",
2697                 .desired_access = FILE_READ_ATTRIBUTES,
2698                 .disposition = FILE_OPEN,
2699                 .create_options = cifs_create_options(cifs_sb, 0),
2700                 .fid = &fid,
2701         };
2702
2703         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2704                        NULL, NULL);
2705         if (rc)
2706                 return rc;
2707
2708         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2709                                    fid.volatile_fid, buf);
2710         buf->f_type = SMB2_SUPER_MAGIC;
2711         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2712         return rc;
2713 }
2714
2715 static bool
2716 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2717 {
2718         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2719                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2720 }
2721
2722 static int
2723 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2724                __u64 length, __u32 type, int lock, int unlock, bool wait)
2725 {
2726         if (unlock && !lock)
2727                 type = SMB2_LOCKFLAG_UNLOCK;
2728         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2729                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2730                          current->tgid, length, offset, type, wait);
2731 }
2732
2733 static void
2734 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2735 {
2736         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2737 }
2738
2739 static void
2740 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2741 {
2742         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2743 }
2744
2745 static void
2746 smb2_new_lease_key(struct cifs_fid *fid)
2747 {
2748         generate_random_uuid(fid->lease_key);
2749 }
2750
2751 static int
2752 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2753                    const char *search_name,
2754                    struct dfs_info3_param **target_nodes,
2755                    unsigned int *num_of_nodes,
2756                    const struct nls_table *nls_codepage, int remap)
2757 {
2758         int rc;
2759         __le16 *utf16_path = NULL;
2760         int utf16_path_len = 0;
2761         struct cifs_tcon *tcon;
2762         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2763         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2764         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2765         int retry_count = 0;
2766
2767         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2768
2769         /*
2770          * Try to use the IPC tcon, otherwise just use any
2771          */
2772         tcon = ses->tcon_ipc;
2773         if (tcon == NULL) {
2774                 spin_lock(&cifs_tcp_ses_lock);
2775                 tcon = list_first_entry_or_null(&ses->tcon_list,
2776                                                 struct cifs_tcon,
2777                                                 tcon_list);
2778                 if (tcon)
2779                         tcon->tc_count++;
2780                 spin_unlock(&cifs_tcp_ses_lock);
2781         }
2782
2783         if (tcon == NULL) {
2784                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2785                          ses);
2786                 rc = -ENOTCONN;
2787                 goto out;
2788         }
2789
2790         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2791                                            &utf16_path_len,
2792                                            nls_codepage, remap);
2793         if (!utf16_path) {
2794                 rc = -ENOMEM;
2795                 goto out;
2796         }
2797
2798         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2799         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2800         if (!dfs_req) {
2801                 rc = -ENOMEM;
2802                 goto out;
2803         }
2804
2805         /* Highest DFS referral version understood */
2806         dfs_req->MaxReferralLevel = DFS_VERSION;
2807
2808         /* Path to resolve in an UTF-16 null-terminated string */
2809         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2810
2811         do {
2812                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2813                                 FSCTL_DFS_GET_REFERRALS,
2814                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2815                                 (char **)&dfs_rsp, &dfs_rsp_size);
2816                 if (!is_retryable_error(rc))
2817                         break;
2818                 usleep_range(512, 2048);
2819         } while (++retry_count < 5);
2820
2821         if (rc) {
2822                 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2823                         cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2824                 goto out;
2825         }
2826
2827         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2828                                  num_of_nodes, target_nodes,
2829                                  nls_codepage, remap, search_name,
2830                                  true /* is_unicode */);
2831         if (rc) {
2832                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2833                 goto out;
2834         }
2835
2836  out:
2837         if (tcon && !tcon->ipc) {
2838                 /* ipc tcons are not refcounted */
2839                 spin_lock(&cifs_tcp_ses_lock);
2840                 tcon->tc_count--;
2841                 /* tc_count can never go negative */
2842                 WARN_ON(tcon->tc_count < 0);
2843                 spin_unlock(&cifs_tcp_ses_lock);
2844         }
2845         kfree(utf16_path);
2846         kfree(dfs_req);
2847         kfree(dfs_rsp);
2848         return rc;
2849 }
2850
2851 static int
2852 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2853                       u32 plen, char **target_path,
2854                       struct cifs_sb_info *cifs_sb)
2855 {
2856         unsigned int len;
2857
2858         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2859         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2860
2861         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2862                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2863                         le64_to_cpu(symlink_buf->InodeType));
2864                 return -EOPNOTSUPP;
2865         }
2866
2867         *target_path = cifs_strndup_from_utf16(
2868                                 symlink_buf->PathBuffer,
2869                                 len, true, cifs_sb->local_nls);
2870         if (!(*target_path))
2871                 return -ENOMEM;
2872
2873         convert_delimiter(*target_path, '/');
2874         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2875
2876         return 0;
2877 }
2878
2879 static int
2880 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2881                       u32 plen, char **target_path,
2882                       struct cifs_sb_info *cifs_sb)
2883 {
2884         unsigned int sub_len;
2885         unsigned int sub_offset;
2886
2887         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2888
2889         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2890         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2891         if (sub_offset + 20 > plen ||
2892             sub_offset + sub_len + 20 > plen) {
2893                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2894                 return -EIO;
2895         }
2896
2897         *target_path = cifs_strndup_from_utf16(
2898                                 symlink_buf->PathBuffer + sub_offset,
2899                                 sub_len, true, cifs_sb->local_nls);
2900         if (!(*target_path))
2901                 return -ENOMEM;
2902
2903         convert_delimiter(*target_path, '/');
2904         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2905
2906         return 0;
2907 }
2908
2909 static int
2910 parse_reparse_point(struct reparse_data_buffer *buf,
2911                     u32 plen, char **target_path,
2912                     struct cifs_sb_info *cifs_sb)
2913 {
2914         if (plen < sizeof(struct reparse_data_buffer)) {
2915                 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2916                          plen);
2917                 return -EIO;
2918         }
2919
2920         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2921             sizeof(struct reparse_data_buffer)) {
2922                 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2923                          plen);
2924                 return -EIO;
2925         }
2926
2927         /* See MS-FSCC 2.1.2 */
2928         switch (le32_to_cpu(buf->ReparseTag)) {
2929         case IO_REPARSE_TAG_NFS:
2930                 return parse_reparse_posix(
2931                         (struct reparse_posix_data *)buf,
2932                         plen, target_path, cifs_sb);
2933         case IO_REPARSE_TAG_SYMLINK:
2934                 return parse_reparse_symlink(
2935                         (struct reparse_symlink_data_buffer *)buf,
2936                         plen, target_path, cifs_sb);
2937         default:
2938                 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
2939                          le32_to_cpu(buf->ReparseTag));
2940                 return -EOPNOTSUPP;
2941         }
2942 }
2943
2944 static int
2945 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2946                    struct cifs_sb_info *cifs_sb, const char *full_path,
2947                    char **target_path, bool is_reparse_point)
2948 {
2949         int rc;
2950         __le16 *utf16_path = NULL;
2951         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2952         struct cifs_open_parms oparms;
2953         struct cifs_fid fid;
2954         struct kvec err_iov = {NULL, 0};
2955         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2956         int flags = CIFS_CP_CREATE_CLOSE_OP;
2957         struct smb_rqst rqst[3];
2958         int resp_buftype[3];
2959         struct kvec rsp_iov[3];
2960         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2961         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2962         struct kvec close_iov[1];
2963         struct smb2_create_rsp *create_rsp;
2964         struct smb2_ioctl_rsp *ioctl_rsp;
2965         struct reparse_data_buffer *reparse_buf;
2966         int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
2967         u32 plen;
2968
2969         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2970
2971         *target_path = NULL;
2972
2973         if (smb3_encryption_required(tcon))
2974                 flags |= CIFS_TRANSFORM_REQ;
2975
2976         memset(rqst, 0, sizeof(rqst));
2977         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2978         memset(rsp_iov, 0, sizeof(rsp_iov));
2979
2980         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2981         if (!utf16_path)
2982                 return -ENOMEM;
2983
2984         /* Open */
2985         memset(&open_iov, 0, sizeof(open_iov));
2986         rqst[0].rq_iov = open_iov;
2987         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2988
2989         oparms = (struct cifs_open_parms) {
2990                 .tcon = tcon,
2991                 .path = full_path,
2992                 .desired_access = FILE_READ_ATTRIBUTES,
2993                 .disposition = FILE_OPEN,
2994                 .create_options = cifs_create_options(cifs_sb, create_options),
2995                 .fid = &fid,
2996         };
2997
2998         rc = SMB2_open_init(tcon, server,
2999                             &rqst[0], &oplock, &oparms, utf16_path);
3000         if (rc)
3001                 goto querty_exit;
3002         smb2_set_next_command(tcon, &rqst[0]);
3003
3004
3005         /* IOCTL */
3006         memset(&io_iov, 0, sizeof(io_iov));
3007         rqst[1].rq_iov = io_iov;
3008         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3009
3010         rc = SMB2_ioctl_init(tcon, server,
3011                              &rqst[1], fid.persistent_fid,
3012                              fid.volatile_fid, FSCTL_GET_REPARSE_POINT, NULL, 0,
3013                              CIFSMaxBufSize -
3014                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3015                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3016         if (rc)
3017                 goto querty_exit;
3018
3019         smb2_set_next_command(tcon, &rqst[1]);
3020         smb2_set_related(&rqst[1]);
3021
3022
3023         /* Close */
3024         memset(&close_iov, 0, sizeof(close_iov));
3025         rqst[2].rq_iov = close_iov;
3026         rqst[2].rq_nvec = 1;
3027
3028         rc = SMB2_close_init(tcon, server,
3029                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3030         if (rc)
3031                 goto querty_exit;
3032
3033         smb2_set_related(&rqst[2]);
3034
3035         rc = compound_send_recv(xid, tcon->ses, server,
3036                                 flags, 3, rqst,
3037                                 resp_buftype, rsp_iov);
3038
3039         create_rsp = rsp_iov[0].iov_base;
3040         if (create_rsp && create_rsp->hdr.Status)
3041                 err_iov = rsp_iov[0];
3042         ioctl_rsp = rsp_iov[1].iov_base;
3043
3044         /*
3045          * Open was successful and we got an ioctl response.
3046          */
3047         if ((rc == 0) && (is_reparse_point)) {
3048                 /* See MS-FSCC 2.3.23 */
3049
3050                 reparse_buf = (struct reparse_data_buffer *)
3051                         ((char *)ioctl_rsp +
3052                          le32_to_cpu(ioctl_rsp->OutputOffset));
3053                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3054
3055                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3056                     rsp_iov[1].iov_len) {
3057                         cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
3058                                  plen);
3059                         rc = -EIO;
3060                         goto querty_exit;
3061                 }
3062
3063                 rc = parse_reparse_point(reparse_buf, plen, target_path,
3064                                          cifs_sb);
3065                 goto querty_exit;
3066         }
3067
3068         if (!rc || !err_iov.iov_base) {
3069                 rc = -ENOENT;
3070                 goto querty_exit;
3071         }
3072
3073         rc = smb2_parse_symlink_response(cifs_sb, &err_iov, target_path);
3074
3075  querty_exit:
3076         cifs_dbg(FYI, "query symlink rc %d\n", rc);
3077         kfree(utf16_path);
3078         SMB2_open_free(&rqst[0]);
3079         SMB2_ioctl_free(&rqst[1]);
3080         SMB2_close_free(&rqst[2]);
3081         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3082         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3083         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3084         return rc;
3085 }
3086
3087 int
3088 smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
3089                    struct cifs_sb_info *cifs_sb, const char *full_path,
3090                    __u32 *tag)
3091 {
3092         int rc;
3093         __le16 *utf16_path = NULL;
3094         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3095         struct cifs_open_parms oparms;
3096         struct cifs_fid fid;
3097         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3098         int flags = CIFS_CP_CREATE_CLOSE_OP;
3099         struct smb_rqst rqst[3];
3100         int resp_buftype[3];
3101         struct kvec rsp_iov[3];
3102         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3103         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3104         struct kvec close_iov[1];
3105         struct smb2_ioctl_rsp *ioctl_rsp;
3106         struct reparse_data_buffer *reparse_buf;
3107         u32 plen;
3108
3109         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3110
3111         if (smb3_encryption_required(tcon))
3112                 flags |= CIFS_TRANSFORM_REQ;
3113
3114         memset(rqst, 0, sizeof(rqst));
3115         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3116         memset(rsp_iov, 0, sizeof(rsp_iov));
3117
3118         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3119         if (!utf16_path)
3120                 return -ENOMEM;
3121
3122         /*
3123          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3124          * to see if there is a handle already open that we can use
3125          */
3126         memset(&open_iov, 0, sizeof(open_iov));
3127         rqst[0].rq_iov = open_iov;
3128         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3129
3130         oparms = (struct cifs_open_parms) {
3131                 .tcon = tcon,
3132                 .path = full_path,
3133                 .desired_access = FILE_READ_ATTRIBUTES,
3134                 .disposition = FILE_OPEN,
3135                 .create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
3136                 .fid = &fid,
3137         };
3138
3139         rc = SMB2_open_init(tcon, server,
3140                             &rqst[0], &oplock, &oparms, utf16_path);
3141         if (rc)
3142                 goto query_rp_exit;
3143         smb2_set_next_command(tcon, &rqst[0]);
3144
3145
3146         /* IOCTL */
3147         memset(&io_iov, 0, sizeof(io_iov));
3148         rqst[1].rq_iov = io_iov;
3149         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3150
3151         rc = SMB2_ioctl_init(tcon, server,
3152                              &rqst[1], COMPOUND_FID,
3153                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3154                              CIFSMaxBufSize -
3155                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3156                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3157         if (rc)
3158                 goto query_rp_exit;
3159
3160         smb2_set_next_command(tcon, &rqst[1]);
3161         smb2_set_related(&rqst[1]);
3162
3163
3164         /* Close */
3165         memset(&close_iov, 0, sizeof(close_iov));
3166         rqst[2].rq_iov = close_iov;
3167         rqst[2].rq_nvec = 1;
3168
3169         rc = SMB2_close_init(tcon, server,
3170                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3171         if (rc)
3172                 goto query_rp_exit;
3173
3174         smb2_set_related(&rqst[2]);
3175
3176         rc = compound_send_recv(xid, tcon->ses, server,
3177                                 flags, 3, rqst,
3178                                 resp_buftype, rsp_iov);
3179
3180         ioctl_rsp = rsp_iov[1].iov_base;
3181
3182         /*
3183          * Open was successful and we got an ioctl response.
3184          */
3185         if (rc == 0) {
3186                 /* See MS-FSCC 2.3.23 */
3187
3188                 reparse_buf = (struct reparse_data_buffer *)
3189                         ((char *)ioctl_rsp +
3190                          le32_to_cpu(ioctl_rsp->OutputOffset));
3191                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3192
3193                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3194                     rsp_iov[1].iov_len) {
3195                         cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3196                                  plen);
3197                         rc = -EIO;
3198                         goto query_rp_exit;
3199                 }
3200                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3201         }
3202
3203  query_rp_exit:
3204         kfree(utf16_path);
3205         SMB2_open_free(&rqst[0]);
3206         SMB2_ioctl_free(&rqst[1]);
3207         SMB2_close_free(&rqst[2]);
3208         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3209         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3210         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3211         return rc;
3212 }
3213
3214 static struct cifs_ntsd *
3215 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3216                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3217 {
3218         struct cifs_ntsd *pntsd = NULL;
3219         unsigned int xid;
3220         int rc = -EOPNOTSUPP;
3221         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3222
3223         if (IS_ERR(tlink))
3224                 return ERR_CAST(tlink);
3225
3226         xid = get_xid();
3227         cifs_dbg(FYI, "trying to get acl\n");
3228
3229         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3230                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3231                             info);
3232         free_xid(xid);
3233
3234         cifs_put_tlink(tlink);
3235
3236         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3237         if (rc)
3238                 return ERR_PTR(rc);
3239         return pntsd;
3240
3241 }
3242
3243 static struct cifs_ntsd *
3244 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3245                      const char *path, u32 *pacllen, u32 info)
3246 {
3247         struct cifs_ntsd *pntsd = NULL;
3248         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3249         unsigned int xid;
3250         int rc;
3251         struct cifs_tcon *tcon;
3252         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3253         struct cifs_fid fid;
3254         struct cifs_open_parms oparms;
3255         __le16 *utf16_path;
3256
3257         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3258         if (IS_ERR(tlink))
3259                 return ERR_CAST(tlink);
3260
3261         tcon = tlink_tcon(tlink);
3262         xid = get_xid();
3263
3264         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3265         if (!utf16_path) {
3266                 rc = -ENOMEM;
3267                 free_xid(xid);
3268                 return ERR_PTR(rc);
3269         }
3270
3271         oparms = (struct cifs_open_parms) {
3272                 .tcon = tcon,
3273                 .path = path,
3274                 .desired_access = READ_CONTROL,
3275                 .disposition = FILE_OPEN,
3276                 /*
3277                  * When querying an ACL, even if the file is a symlink
3278                  * we want to open the source not the target, and so
3279                  * the protocol requires that the client specify this
3280                  * flag when opening a reparse point
3281                  */
3282                 .create_options = cifs_create_options(cifs_sb, 0) |
3283                                   OPEN_REPARSE_POINT,
3284                 .fid = &fid,
3285         };
3286
3287         if (info & SACL_SECINFO)
3288                 oparms.desired_access |= SYSTEM_SECURITY;
3289
3290         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3291                        NULL);
3292         kfree(utf16_path);
3293         if (!rc) {
3294                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3295                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3296                                     info);
3297                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3298         }
3299
3300         cifs_put_tlink(tlink);
3301         free_xid(xid);
3302
3303         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3304         if (rc)
3305                 return ERR_PTR(rc);
3306         return pntsd;
3307 }
3308
3309 static int
3310 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3311                 struct inode *inode, const char *path, int aclflag)
3312 {
3313         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3314         unsigned int xid;
3315         int rc, access_flags = 0;
3316         struct cifs_tcon *tcon;
3317         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3318         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3319         struct cifs_fid fid;
3320         struct cifs_open_parms oparms;
3321         __le16 *utf16_path;
3322
3323         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3324         if (IS_ERR(tlink))
3325                 return PTR_ERR(tlink);
3326
3327         tcon = tlink_tcon(tlink);
3328         xid = get_xid();
3329
3330         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3331                 access_flags |= WRITE_OWNER;
3332         if (aclflag & CIFS_ACL_SACL)
3333                 access_flags |= SYSTEM_SECURITY;
3334         if (aclflag & CIFS_ACL_DACL)
3335                 access_flags |= WRITE_DAC;
3336
3337         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3338         if (!utf16_path) {
3339                 rc = -ENOMEM;
3340                 free_xid(xid);
3341                 return rc;
3342         }
3343
3344         oparms = (struct cifs_open_parms) {
3345                 .tcon = tcon,
3346                 .desired_access = access_flags,
3347                 .create_options = cifs_create_options(cifs_sb, 0),
3348                 .disposition = FILE_OPEN,
3349                 .path = path,
3350                 .fid = &fid,
3351         };
3352
3353         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3354                        NULL, NULL);
3355         kfree(utf16_path);
3356         if (!rc) {
3357                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3358                             fid.volatile_fid, pnntsd, acllen, aclflag);
3359                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3360         }
3361
3362         cifs_put_tlink(tlink);
3363         free_xid(xid);
3364         return rc;
3365 }
3366
3367 /* Retrieve an ACL from the server */
3368 static struct cifs_ntsd *
3369 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3370              struct inode *inode, const char *path,
3371              u32 *pacllen, u32 info)
3372 {
3373         struct cifs_ntsd *pntsd = NULL;
3374         struct cifsFileInfo *open_file = NULL;
3375
3376         if (inode && !(info & SACL_SECINFO))
3377                 open_file = find_readable_file(CIFS_I(inode), true);
3378         if (!open_file || (info & SACL_SECINFO))
3379                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3380
3381         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3382         cifsFileInfo_put(open_file);
3383         return pntsd;
3384 }
3385
3386 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3387                              loff_t offset, loff_t len, unsigned int xid)
3388 {
3389         struct cifsFileInfo *cfile = file->private_data;
3390         struct file_zero_data_information fsctl_buf;
3391
3392         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3393
3394         fsctl_buf.FileOffset = cpu_to_le64(offset);
3395         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3396
3397         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3398                           cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3399                           (char *)&fsctl_buf,
3400                           sizeof(struct file_zero_data_information),
3401                           0, NULL, NULL);
3402 }
3403
3404 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3405                             loff_t offset, loff_t len, bool keep_size)
3406 {
3407         struct cifs_ses *ses = tcon->ses;
3408         struct inode *inode = file_inode(file);
3409         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3410         struct cifsFileInfo *cfile = file->private_data;
3411         long rc;
3412         unsigned int xid;
3413         __le64 eof;
3414
3415         xid = get_xid();
3416
3417         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3418                               ses->Suid, offset, len);
3419
3420         inode_lock(inode);
3421         filemap_invalidate_lock(inode->i_mapping);
3422
3423         /*
3424          * We zero the range through ioctl, so we need remove the page caches
3425          * first, otherwise the data may be inconsistent with the server.
3426          */
3427         truncate_pagecache_range(inode, offset, offset + len - 1);
3428
3429         /* if file not oplocked can't be sure whether asking to extend size */
3430         rc = -EOPNOTSUPP;
3431         if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3432                 goto zero_range_exit;
3433
3434         rc = smb3_zero_data(file, tcon, offset, len, xid);
3435         if (rc < 0)
3436                 goto zero_range_exit;
3437
3438         /*
3439          * do we also need to change the size of the file?
3440          */
3441         if (keep_size == false && i_size_read(inode) < offset + len) {
3442                 eof = cpu_to_le64(offset + len);
3443                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3444                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3445         }
3446
3447  zero_range_exit:
3448         filemap_invalidate_unlock(inode->i_mapping);
3449         inode_unlock(inode);
3450         free_xid(xid);
3451         if (rc)
3452                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3453                               ses->Suid, offset, len, rc);
3454         else
3455                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3456                               ses->Suid, offset, len);
3457         return rc;
3458 }
3459
3460 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3461                             loff_t offset, loff_t len)
3462 {
3463         struct inode *inode = file_inode(file);
3464         struct cifsFileInfo *cfile = file->private_data;
3465         struct file_zero_data_information fsctl_buf;
3466         long rc;
3467         unsigned int xid;
3468         __u8 set_sparse = 1;
3469
3470         xid = get_xid();
3471
3472         inode_lock(inode);
3473         /* Need to make file sparse, if not already, before freeing range. */
3474         /* Consider adding equivalent for compressed since it could also work */
3475         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3476                 rc = -EOPNOTSUPP;
3477                 goto out;
3478         }
3479
3480         filemap_invalidate_lock(inode->i_mapping);
3481         /*
3482          * We implement the punch hole through ioctl, so we need remove the page
3483          * caches first, otherwise the data may be inconsistent with the server.
3484          */
3485         truncate_pagecache_range(inode, offset, offset + len - 1);
3486
3487         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3488
3489         fsctl_buf.FileOffset = cpu_to_le64(offset);
3490         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3491
3492         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3493                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3494                         (char *)&fsctl_buf,
3495                         sizeof(struct file_zero_data_information),
3496                         CIFSMaxBufSize, NULL, NULL);
3497         filemap_invalidate_unlock(inode->i_mapping);
3498 out:
3499         inode_unlock(inode);
3500         free_xid(xid);
3501         return rc;
3502 }
3503
3504 static int smb3_simple_fallocate_write_range(unsigned int xid,
3505                                              struct cifs_tcon *tcon,
3506                                              struct cifsFileInfo *cfile,
3507                                              loff_t off, loff_t len,
3508                                              char *buf)
3509 {
3510         struct cifs_io_parms io_parms = {0};
3511         int nbytes;
3512         int rc = 0;
3513         struct kvec iov[2];
3514
3515         io_parms.netfid = cfile->fid.netfid;
3516         io_parms.pid = current->tgid;
3517         io_parms.tcon = tcon;
3518         io_parms.persistent_fid = cfile->fid.persistent_fid;
3519         io_parms.volatile_fid = cfile->fid.volatile_fid;
3520
3521         while (len) {
3522                 io_parms.offset = off;
3523                 io_parms.length = len;
3524                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3525                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3526                 /* iov[0] is reserved for smb header */
3527                 iov[1].iov_base = buf;
3528                 iov[1].iov_len = io_parms.length;
3529                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3530                 if (rc)
3531                         break;
3532                 if (nbytes > len)
3533                         return -EINVAL;
3534                 buf += nbytes;
3535                 off += nbytes;
3536                 len -= nbytes;
3537         }
3538         return rc;
3539 }
3540
3541 static int smb3_simple_fallocate_range(unsigned int xid,
3542                                        struct cifs_tcon *tcon,
3543                                        struct cifsFileInfo *cfile,
3544                                        loff_t off, loff_t len)
3545 {
3546         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3547         u32 out_data_len;
3548         char *buf = NULL;
3549         loff_t l;
3550         int rc;
3551
3552         in_data.file_offset = cpu_to_le64(off);
3553         in_data.length = cpu_to_le64(len);
3554         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3555                         cfile->fid.volatile_fid,
3556                         FSCTL_QUERY_ALLOCATED_RANGES,
3557                         (char *)&in_data, sizeof(in_data),
3558                         1024 * sizeof(struct file_allocated_range_buffer),
3559                         (char **)&out_data, &out_data_len);
3560         if (rc)
3561                 goto out;
3562
3563         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3564         if (buf == NULL) {
3565                 rc = -ENOMEM;
3566                 goto out;
3567         }
3568
3569         tmp_data = out_data;
3570         while (len) {
3571                 /*
3572                  * The rest of the region is unmapped so write it all.
3573                  */
3574                 if (out_data_len == 0) {
3575                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3576                                                cfile, off, len, buf);
3577                         goto out;
3578                 }
3579
3580                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3581                         rc = -EINVAL;
3582                         goto out;
3583                 }
3584
3585                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3586                         /*
3587                          * We are at a hole. Write until the end of the region
3588                          * or until the next allocated data,
3589                          * whichever comes next.
3590                          */
3591                         l = le64_to_cpu(tmp_data->file_offset) - off;
3592                         if (len < l)
3593                                 l = len;
3594                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3595                                                cfile, off, l, buf);
3596                         if (rc)
3597                                 goto out;
3598                         off = off + l;
3599                         len = len - l;
3600                         if (len == 0)
3601                                 goto out;
3602                 }
3603                 /*
3604                  * We are at a section of allocated data, just skip forward
3605                  * until the end of the data or the end of the region
3606                  * we are supposed to fallocate, whichever comes first.
3607                  */
3608                 l = le64_to_cpu(tmp_data->length);
3609                 if (len < l)
3610                         l = len;
3611                 off += l;
3612                 len -= l;
3613
3614                 tmp_data = &tmp_data[1];
3615                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3616         }
3617
3618  out:
3619         kfree(out_data);
3620         kfree(buf);
3621         return rc;
3622 }
3623
3624
3625 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3626                             loff_t off, loff_t len, bool keep_size)
3627 {
3628         struct inode *inode;
3629         struct cifsInodeInfo *cifsi;
3630         struct cifsFileInfo *cfile = file->private_data;
3631         long rc = -EOPNOTSUPP;
3632         unsigned int xid;
3633         __le64 eof;
3634
3635         xid = get_xid();
3636
3637         inode = d_inode(cfile->dentry);
3638         cifsi = CIFS_I(inode);
3639
3640         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3641                                 tcon->ses->Suid, off, len);
3642         /* if file not oplocked can't be sure whether asking to extend size */
3643         if (!CIFS_CACHE_READ(cifsi))
3644                 if (keep_size == false) {
3645                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3646                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3647                         free_xid(xid);
3648                         return rc;
3649                 }
3650
3651         /*
3652          * Extending the file
3653          */
3654         if ((keep_size == false) && i_size_read(inode) < off + len) {
3655                 rc = inode_newsize_ok(inode, off + len);
3656                 if (rc)
3657                         goto out;
3658
3659                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3660                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3661
3662                 eof = cpu_to_le64(off + len);
3663                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3664                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3665                 if (rc == 0) {
3666                         cifsi->server_eof = off + len;
3667                         cifs_setsize(inode, off + len);
3668                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3669                         truncate_setsize(inode, off + len);
3670                 }
3671                 goto out;
3672         }
3673
3674         /*
3675          * Files are non-sparse by default so falloc may be a no-op
3676          * Must check if file sparse. If not sparse, and since we are not
3677          * extending then no need to do anything since file already allocated
3678          */
3679         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3680                 rc = 0;
3681                 goto out;
3682         }
3683
3684         if (keep_size == true) {
3685                 /*
3686                  * We can not preallocate pages beyond the end of the file
3687                  * in SMB2
3688                  */
3689                 if (off >= i_size_read(inode)) {
3690                         rc = 0;
3691                         goto out;
3692                 }
3693                 /*
3694                  * For fallocates that are partially beyond the end of file,
3695                  * clamp len so we only fallocate up to the end of file.
3696                  */
3697                 if (off + len > i_size_read(inode)) {
3698                         len = i_size_read(inode) - off;
3699                 }
3700         }
3701
3702         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3703                 /*
3704                  * At this point, we are trying to fallocate an internal
3705                  * regions of a sparse file. Since smb2 does not have a
3706                  * fallocate command we have two otions on how to emulate this.
3707                  * We can either turn the entire file to become non-sparse
3708                  * which we only do if the fallocate is for virtually
3709                  * the whole file,  or we can overwrite the region with zeroes
3710                  * using SMB2_write, which could be prohibitevly expensive
3711                  * if len is large.
3712                  */
3713                 /*
3714                  * We are only trying to fallocate a small region so
3715                  * just write it with zero.
3716                  */
3717                 if (len <= 1024 * 1024) {
3718                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3719                                                          off, len);
3720                         goto out;
3721                 }
3722
3723                 /*
3724                  * Check if falloc starts within first few pages of file
3725                  * and ends within a few pages of the end of file to
3726                  * ensure that most of file is being forced to be
3727                  * fallocated now. If so then setting whole file sparse
3728                  * ie potentially making a few extra pages at the beginning
3729                  * or end of the file non-sparse via set_sparse is harmless.
3730                  */
3731                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3732                         rc = -EOPNOTSUPP;
3733                         goto out;
3734                 }
3735         }
3736
3737         smb2_set_sparse(xid, tcon, cfile, inode, false);
3738         rc = 0;
3739
3740 out:
3741         if (rc)
3742                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3743                                 tcon->ses->Suid, off, len, rc);
3744         else
3745                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3746                                 tcon->ses->Suid, off, len);
3747
3748         free_xid(xid);
3749         return rc;
3750 }
3751
3752 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3753                             loff_t off, loff_t len)
3754 {
3755         int rc;
3756         unsigned int xid;
3757         struct inode *inode = file_inode(file);
3758         struct cifsFileInfo *cfile = file->private_data;
3759         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3760         __le64 eof;
3761         loff_t old_eof;
3762
3763         xid = get_xid();
3764
3765         inode_lock(inode);
3766
3767         old_eof = i_size_read(inode);
3768         if ((off >= old_eof) ||
3769             off + len >= old_eof) {
3770                 rc = -EINVAL;
3771                 goto out;
3772         }
3773
3774         filemap_invalidate_lock(inode->i_mapping);
3775         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3776         if (rc < 0)
3777                 goto out_2;
3778
3779         truncate_pagecache_range(inode, off, old_eof);
3780
3781         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3782                                   old_eof - off - len, off);
3783         if (rc < 0)
3784                 goto out_2;
3785
3786         eof = cpu_to_le64(old_eof - len);
3787         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3788                           cfile->fid.volatile_fid, cfile->pid, &eof);
3789         if (rc < 0)
3790                 goto out_2;
3791
3792         rc = 0;
3793
3794         cifsi->server_eof = i_size_read(inode) - len;
3795         truncate_setsize(inode, cifsi->server_eof);
3796
3797 out_2:
3798         filemap_invalidate_unlock(inode->i_mapping);
3799  out:
3800         inode_unlock(inode);
3801         free_xid(xid);
3802         return rc;
3803 }
3804
3805 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3806                               loff_t off, loff_t len)
3807 {
3808         int rc;
3809         unsigned int xid;
3810         struct cifsFileInfo *cfile = file->private_data;
3811         struct inode *inode = file_inode(file);
3812         __le64 eof;
3813         __u64  count, old_eof;
3814
3815         xid = get_xid();
3816
3817         inode_lock(inode);
3818
3819         old_eof = i_size_read(inode);
3820         if (off >= old_eof) {
3821                 rc = -EINVAL;
3822                 goto out;
3823         }
3824
3825         count = old_eof - off;
3826         eof = cpu_to_le64(old_eof + len);
3827
3828         filemap_invalidate_lock(inode->i_mapping);
3829         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3830         if (rc < 0)
3831                 goto out_2;
3832         truncate_pagecache_range(inode, off, old_eof);
3833
3834         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3835                           cfile->fid.volatile_fid, cfile->pid, &eof);
3836         if (rc < 0)
3837                 goto out_2;
3838
3839         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3840         if (rc < 0)
3841                 goto out_2;
3842
3843         rc = smb3_zero_data(file, tcon, off, len, xid);
3844         if (rc < 0)
3845                 goto out_2;
3846
3847         rc = 0;
3848 out_2:
3849         filemap_invalidate_unlock(inode->i_mapping);
3850  out:
3851         inode_unlock(inode);
3852         free_xid(xid);
3853         return rc;
3854 }
3855
3856 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3857 {
3858         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3859         struct cifsInodeInfo *cifsi;
3860         struct inode *inode;
3861         int rc = 0;
3862         struct file_allocated_range_buffer in_data, *out_data = NULL;
3863         u32 out_data_len;
3864         unsigned int xid;
3865
3866         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3867                 return generic_file_llseek(file, offset, whence);
3868
3869         inode = d_inode(cfile->dentry);
3870         cifsi = CIFS_I(inode);
3871
3872         if (offset < 0 || offset >= i_size_read(inode))
3873                 return -ENXIO;
3874
3875         xid = get_xid();
3876         /*
3877          * We need to be sure that all dirty pages are written as they
3878          * might fill holes on the server.
3879          * Note that we also MUST flush any written pages since at least
3880          * some servers (Windows2016) will not reflect recent writes in
3881          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3882          */
3883         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3884         if (wrcfile) {
3885                 filemap_write_and_wait(inode->i_mapping);
3886                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3887                 cifsFileInfo_put(wrcfile);
3888         }
3889
3890         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3891                 if (whence == SEEK_HOLE)
3892                         offset = i_size_read(inode);
3893                 goto lseek_exit;
3894         }
3895
3896         in_data.file_offset = cpu_to_le64(offset);
3897         in_data.length = cpu_to_le64(i_size_read(inode));
3898
3899         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3900                         cfile->fid.volatile_fid,
3901                         FSCTL_QUERY_ALLOCATED_RANGES,
3902                         (char *)&in_data, sizeof(in_data),
3903                         sizeof(struct file_allocated_range_buffer),
3904                         (char **)&out_data, &out_data_len);
3905         if (rc == -E2BIG)
3906                 rc = 0;
3907         if (rc)
3908                 goto lseek_exit;
3909
3910         if (whence == SEEK_HOLE && out_data_len == 0)
3911                 goto lseek_exit;
3912
3913         if (whence == SEEK_DATA && out_data_len == 0) {
3914                 rc = -ENXIO;
3915                 goto lseek_exit;
3916         }
3917
3918         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3919                 rc = -EINVAL;
3920                 goto lseek_exit;
3921         }
3922         if (whence == SEEK_DATA) {
3923                 offset = le64_to_cpu(out_data->file_offset);
3924                 goto lseek_exit;
3925         }
3926         if (offset < le64_to_cpu(out_data->file_offset))
3927                 goto lseek_exit;
3928
3929         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3930
3931  lseek_exit:
3932         free_xid(xid);
3933         kfree(out_data);
3934         if (!rc)
3935                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3936         else
3937                 return rc;
3938 }
3939
3940 static int smb3_fiemap(struct cifs_tcon *tcon,
3941                        struct cifsFileInfo *cfile,
3942                        struct fiemap_extent_info *fei, u64 start, u64 len)
3943 {
3944         unsigned int xid;
3945         struct file_allocated_range_buffer in_data, *out_data;
3946         u32 out_data_len;
3947         int i, num, rc, flags, last_blob;
3948         u64 next;
3949
3950         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3951         if (rc)
3952                 return rc;
3953
3954         xid = get_xid();
3955  again:
3956         in_data.file_offset = cpu_to_le64(start);
3957         in_data.length = cpu_to_le64(len);
3958
3959         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3960                         cfile->fid.volatile_fid,
3961                         FSCTL_QUERY_ALLOCATED_RANGES,
3962                         (char *)&in_data, sizeof(in_data),
3963                         1024 * sizeof(struct file_allocated_range_buffer),
3964                         (char **)&out_data, &out_data_len);
3965         if (rc == -E2BIG) {
3966                 last_blob = 0;
3967                 rc = 0;
3968         } else
3969                 last_blob = 1;
3970         if (rc)
3971                 goto out;
3972
3973         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3974                 rc = -EINVAL;
3975                 goto out;
3976         }
3977         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3978                 rc = -EINVAL;
3979                 goto out;
3980         }
3981
3982         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3983         for (i = 0; i < num; i++) {
3984                 flags = 0;
3985                 if (i == num - 1 && last_blob)
3986                         flags |= FIEMAP_EXTENT_LAST;
3987
3988                 rc = fiemap_fill_next_extent(fei,
3989                                 le64_to_cpu(out_data[i].file_offset),
3990                                 le64_to_cpu(out_data[i].file_offset),
3991                                 le64_to_cpu(out_data[i].length),
3992                                 flags);
3993                 if (rc < 0)
3994                         goto out;
3995                 if (rc == 1) {
3996                         rc = 0;
3997                         goto out;
3998                 }
3999         }
4000
4001         if (!last_blob) {
4002                 next = le64_to_cpu(out_data[num - 1].file_offset) +
4003                   le64_to_cpu(out_data[num - 1].length);
4004                 len = len - (next - start);
4005                 start = next;
4006                 goto again;
4007         }
4008
4009  out:
4010         free_xid(xid);
4011         kfree(out_data);
4012         return rc;
4013 }
4014
4015 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
4016                            loff_t off, loff_t len)
4017 {
4018         /* KEEP_SIZE already checked for by do_fallocate */
4019         if (mode & FALLOC_FL_PUNCH_HOLE)
4020                 return smb3_punch_hole(file, tcon, off, len);
4021         else if (mode & FALLOC_FL_ZERO_RANGE) {
4022                 if (mode & FALLOC_FL_KEEP_SIZE)
4023                         return smb3_zero_range(file, tcon, off, len, true);
4024                 return smb3_zero_range(file, tcon, off, len, false);
4025         } else if (mode == FALLOC_FL_KEEP_SIZE)
4026                 return smb3_simple_falloc(file, tcon, off, len, true);
4027         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
4028                 return smb3_collapse_range(file, tcon, off, len);
4029         else if (mode == FALLOC_FL_INSERT_RANGE)
4030                 return smb3_insert_range(file, tcon, off, len);
4031         else if (mode == 0)
4032                 return smb3_simple_falloc(file, tcon, off, len, false);
4033
4034         return -EOPNOTSUPP;
4035 }
4036
4037 static void
4038 smb2_downgrade_oplock(struct TCP_Server_Info *server,
4039                       struct cifsInodeInfo *cinode, __u32 oplock,
4040                       unsigned int epoch, bool *purge_cache)
4041 {
4042         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
4043 }
4044
4045 static void
4046 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4047                        unsigned int epoch, bool *purge_cache);
4048
4049 static void
4050 smb3_downgrade_oplock(struct TCP_Server_Info *server,
4051                        struct cifsInodeInfo *cinode, __u32 oplock,
4052                        unsigned int epoch, bool *purge_cache)
4053 {
4054         unsigned int old_state = cinode->oplock;
4055         unsigned int old_epoch = cinode->epoch;
4056         unsigned int new_state;
4057
4058         if (epoch > old_epoch) {
4059                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
4060                 cinode->epoch = epoch;
4061         }
4062
4063         new_state = cinode->oplock;
4064         *purge_cache = false;
4065
4066         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
4067             (new_state & CIFS_CACHE_READ_FLG) == 0)
4068                 *purge_cache = true;
4069         else if (old_state == new_state && (epoch - old_epoch > 1))
4070                 *purge_cache = true;
4071 }
4072
4073 static void
4074 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4075                       unsigned int epoch, bool *purge_cache)
4076 {
4077         oplock &= 0xFF;
4078         cinode->lease_granted = false;
4079         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4080                 return;
4081         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
4082                 cinode->oplock = CIFS_CACHE_RHW_FLG;
4083                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
4084                          &cinode->vfs_inode);
4085         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
4086                 cinode->oplock = CIFS_CACHE_RW_FLG;
4087                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
4088                          &cinode->vfs_inode);
4089         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
4090                 cinode->oplock = CIFS_CACHE_READ_FLG;
4091                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
4092                          &cinode->vfs_inode);
4093         } else
4094                 cinode->oplock = 0;
4095 }
4096
4097 static void
4098 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4099                        unsigned int epoch, bool *purge_cache)
4100 {
4101         char message[5] = {0};
4102         unsigned int new_oplock = 0;
4103
4104         oplock &= 0xFF;
4105         cinode->lease_granted = true;
4106         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4107                 return;
4108
4109         /* Check if the server granted an oplock rather than a lease */
4110         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4111                 return smb2_set_oplock_level(cinode, oplock, epoch,
4112                                              purge_cache);
4113
4114         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4115                 new_oplock |= CIFS_CACHE_READ_FLG;
4116                 strcat(message, "R");
4117         }
4118         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4119                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4120                 strcat(message, "H");
4121         }
4122         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4123                 new_oplock |= CIFS_CACHE_WRITE_FLG;
4124                 strcat(message, "W");
4125         }
4126         if (!new_oplock)
4127                 strncpy(message, "None", sizeof(message));
4128
4129         cinode->oplock = new_oplock;
4130         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4131                  &cinode->vfs_inode);
4132 }
4133
4134 static void
4135 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4136                       unsigned int epoch, bool *purge_cache)
4137 {
4138         unsigned int old_oplock = cinode->oplock;
4139
4140         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4141
4142         if (purge_cache) {
4143                 *purge_cache = false;
4144                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4145                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4146                             (epoch - cinode->epoch > 0))
4147                                 *purge_cache = true;
4148                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4149                                  (epoch - cinode->epoch > 1))
4150                                 *purge_cache = true;
4151                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4152                                  (epoch - cinode->epoch > 1))
4153                                 *purge_cache = true;
4154                         else if (cinode->oplock == 0 &&
4155                                  (epoch - cinode->epoch > 0))
4156                                 *purge_cache = true;
4157                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4158                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4159                             (epoch - cinode->epoch > 0))
4160                                 *purge_cache = true;
4161                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4162                                  (epoch - cinode->epoch > 1))
4163                                 *purge_cache = true;
4164                 }
4165                 cinode->epoch = epoch;
4166         }
4167 }
4168
4169 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4170 static bool
4171 smb2_is_read_op(__u32 oplock)
4172 {
4173         return oplock == SMB2_OPLOCK_LEVEL_II;
4174 }
4175 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4176
4177 static bool
4178 smb21_is_read_op(__u32 oplock)
4179 {
4180         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4181                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4182 }
4183
4184 static __le32
4185 map_oplock_to_lease(u8 oplock)
4186 {
4187         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4188                 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4189         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4190                 return SMB2_LEASE_READ_CACHING_LE;
4191         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4192                 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4193                        SMB2_LEASE_WRITE_CACHING_LE;
4194         return 0;
4195 }
4196
4197 static char *
4198 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4199 {
4200         struct create_lease *buf;
4201
4202         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4203         if (!buf)
4204                 return NULL;
4205
4206         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4207         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4208
4209         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4210                                         (struct create_lease, lcontext));
4211         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4212         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4213                                 (struct create_lease, Name));
4214         buf->ccontext.NameLength = cpu_to_le16(4);
4215         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4216         buf->Name[0] = 'R';
4217         buf->Name[1] = 'q';
4218         buf->Name[2] = 'L';
4219         buf->Name[3] = 's';
4220         return (char *)buf;
4221 }
4222
4223 static char *
4224 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4225 {
4226         struct create_lease_v2 *buf;
4227
4228         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4229         if (!buf)
4230                 return NULL;
4231
4232         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4233         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4234
4235         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4236                                         (struct create_lease_v2, lcontext));
4237         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4238         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4239                                 (struct create_lease_v2, Name));
4240         buf->ccontext.NameLength = cpu_to_le16(4);
4241         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4242         buf->Name[0] = 'R';
4243         buf->Name[1] = 'q';
4244         buf->Name[2] = 'L';
4245         buf->Name[3] = 's';
4246         return (char *)buf;
4247 }
4248
4249 static __u8
4250 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4251 {
4252         struct create_lease *lc = (struct create_lease *)buf;
4253
4254         *epoch = 0; /* not used */
4255         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4256                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4257         return le32_to_cpu(lc->lcontext.LeaseState);
4258 }
4259
4260 static __u8
4261 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4262 {
4263         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4264
4265         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4266         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4267                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4268         if (lease_key)
4269                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4270         return le32_to_cpu(lc->lcontext.LeaseState);
4271 }
4272
4273 static unsigned int
4274 smb2_wp_retry_size(struct inode *inode)
4275 {
4276         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4277                      SMB2_MAX_BUFFER_SIZE);
4278 }
4279
4280 static bool
4281 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4282 {
4283         return !cfile->invalidHandle;
4284 }
4285
4286 static void
4287 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4288                    struct smb_rqst *old_rq, __le16 cipher_type)
4289 {
4290         struct smb2_hdr *shdr =
4291                         (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4292
4293         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4294         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4295         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4296         tr_hdr->Flags = cpu_to_le16(0x01);
4297         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4298             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4299                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4300         else
4301                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4302         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4303 }
4304
4305 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4306                                  int num_rqst, const u8 *sig, u8 **iv,
4307                                  struct aead_request **req, struct scatterlist **sgl,
4308                                  unsigned int *num_sgs)
4309 {
4310         unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4311         unsigned int iv_size = crypto_aead_ivsize(tfm);
4312         unsigned int len;
4313         u8 *p;
4314
4315         *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4316
4317         len = iv_size;
4318         len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4319         len = ALIGN(len, crypto_tfm_ctx_alignment());
4320         len += req_size;
4321         len = ALIGN(len, __alignof__(struct scatterlist));
4322         len += *num_sgs * sizeof(**sgl);
4323
4324         p = kmalloc(len, GFP_ATOMIC);
4325         if (!p)
4326                 return NULL;
4327
4328         *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4329         *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4330                                                 crypto_tfm_ctx_alignment());
4331         *sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4332                                                __alignof__(struct scatterlist));
4333         return p;
4334 }
4335
4336 static void *smb2_get_aead_req(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4337                                int num_rqst, const u8 *sig, u8 **iv,
4338                                struct aead_request **req, struct scatterlist **sgl)
4339 {
4340         unsigned int off, len, skip;
4341         struct scatterlist *sg;
4342         unsigned int num_sgs;
4343         unsigned long addr;
4344         int i, j;
4345         void *p;
4346
4347         p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, sgl, &num_sgs);
4348         if (!p)
4349                 return NULL;
4350
4351         sg_init_table(*sgl, num_sgs);
4352         sg = *sgl;
4353
4354         /*
4355          * The first rqst has a transform header where the
4356          * first 20 bytes are not part of the encrypted blob.
4357          */
4358         skip = 20;
4359
4360         /* Assumes the first rqst has a transform header as the first iov.
4361          * I.e.
4362          * rqst[0].rq_iov[0]  is transform header
4363          * rqst[0].rq_iov[1+] data to be encrypted/decrypted
4364          * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
4365          */
4366         for (i = 0; i < num_rqst; i++) {
4367                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4368                         struct kvec *iov = &rqst[i].rq_iov[j];
4369
4370                         addr = (unsigned long)iov->iov_base + skip;
4371                         len = iov->iov_len - skip;
4372                         sg = cifs_sg_set_buf(sg, (void *)addr, len);
4373
4374                         /* See the above comment on the 'skip' assignment */
4375                         skip = 0;
4376                 }
4377                 for (j = 0; j < rqst[i].rq_npages; j++) {
4378                         rqst_page_get_length(&rqst[i], j, &len, &off);
4379                         sg_set_page(sg++, rqst[i].rq_pages[j], len, off);
4380                 }
4381         }
4382         cifs_sg_set_buf(sg, sig, SMB2_SIGNATURE_SIZE);
4383
4384         return p;
4385 }
4386
4387 static int
4388 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4389 {
4390         struct TCP_Server_Info *pserver;
4391         struct cifs_ses *ses;
4392         u8 *ses_enc_key;
4393
4394         /* If server is a channel, select the primary channel */
4395         pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
4396
4397         spin_lock(&cifs_tcp_ses_lock);
4398         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4399                 if (ses->Suid == ses_id) {
4400                         spin_lock(&ses->ses_lock);
4401                         ses_enc_key = enc ? ses->smb3encryptionkey :
4402                                 ses->smb3decryptionkey;
4403                         memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4404                         spin_unlock(&ses->ses_lock);
4405                         spin_unlock(&cifs_tcp_ses_lock);
4406                         return 0;
4407                 }
4408         }
4409         spin_unlock(&cifs_tcp_ses_lock);
4410
4411         return -EAGAIN;
4412 }
4413 /*
4414  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4415  * iov[0]   - transform header (associate data),
4416  * iov[1-N] - SMB2 header and pages - data to encrypt.
4417  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4418  * untouched.
4419  */
4420 static int
4421 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4422               struct smb_rqst *rqst, int enc)
4423 {
4424         struct smb2_transform_hdr *tr_hdr =
4425                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4426         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4427         int rc = 0;
4428         struct scatterlist *sg;
4429         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4430         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4431         struct aead_request *req;
4432         u8 *iv;
4433         DECLARE_CRYPTO_WAIT(wait);
4434         struct crypto_aead *tfm;
4435         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4436         void *creq;
4437
4438         rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4439         if (rc) {
4440                 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
4441                          enc ? "en" : "de");
4442                 return rc;
4443         }
4444
4445         rc = smb3_crypto_aead_allocate(server);
4446         if (rc) {
4447                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4448                 return rc;
4449         }
4450
4451         tfm = enc ? server->secmech.enc : server->secmech.dec;
4452
4453         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4454                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4455                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4456         else
4457                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4458
4459         if (rc) {
4460                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4461                 return rc;
4462         }
4463
4464         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4465         if (rc) {
4466                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4467                 return rc;
4468         }
4469
4470         creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg);
4471         if (unlikely(!creq))
4472                 return -ENOMEM;
4473
4474         if (!enc) {
4475                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4476                 crypt_len += SMB2_SIGNATURE_SIZE;
4477         }
4478
4479         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4480             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4481                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4482         else {
4483                 iv[0] = 3;
4484                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4485         }
4486
4487         aead_request_set_tfm(req, tfm);
4488         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4489         aead_request_set_ad(req, assoc_data_len);
4490
4491         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4492                                   crypto_req_done, &wait);
4493
4494         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4495                                 : crypto_aead_decrypt(req), &wait);
4496
4497         if (!rc && enc)
4498                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4499
4500         kfree_sensitive(creq);
4501         return rc;
4502 }
4503
4504 void
4505 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4506 {
4507         int i, j;
4508
4509         for (i = 0; i < num_rqst; i++) {
4510                 if (rqst[i].rq_pages) {
4511                         for (j = rqst[i].rq_npages - 1; j >= 0; j--)
4512                                 put_page(rqst[i].rq_pages[j]);
4513                         kfree(rqst[i].rq_pages);
4514                 }
4515         }
4516 }
4517
4518 /*
4519  * This function will initialize new_rq and encrypt the content.
4520  * The first entry, new_rq[0], only contains a single iov which contains
4521  * a smb2_transform_hdr and is pre-allocated by the caller.
4522  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4523  *
4524  * The end result is an array of smb_rqst structures where the first structure
4525  * only contains a single iov for the transform header which we then can pass
4526  * to crypt_message().
4527  *
4528  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4529  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4530  */
4531 static int
4532 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4533                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4534 {
4535         struct page **pages;
4536         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4537         unsigned int npages;
4538         unsigned int orig_len = 0;
4539         int i, j;
4540         int rc = -ENOMEM;
4541
4542         for (i = 1; i < num_rqst; i++) {
4543                 struct smb_rqst *old = &old_rq[i - 1];
4544                 struct smb_rqst *new = &new_rq[i];
4545
4546                 orig_len += smb_rqst_len(server, old);
4547                 new->rq_iov = old->rq_iov;
4548                 new->rq_nvec = old->rq_nvec;
4549
4550                 npages = old->rq_npages;
4551                 if (!npages)
4552                         continue;
4553
4554                 pages = kmalloc_array(npages, sizeof(struct page *),
4555                                       GFP_KERNEL);
4556                 if (!pages)
4557                         goto err_free;
4558
4559                 new->rq_pages = pages;
4560                 new->rq_npages = npages;
4561                 new->rq_offset = old->rq_offset;
4562                 new->rq_pagesz = old->rq_pagesz;
4563                 new->rq_tailsz = old->rq_tailsz;
4564
4565                 for (j = 0; j < npages; j++) {
4566                         pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4567                         if (!pages[j])
4568                                 goto err_free;
4569                 }
4570
4571                 /* copy pages form the old */
4572                 for (j = 0; j < npages; j++) {
4573                         unsigned int offset, len;
4574
4575                         rqst_page_get_length(new, j, &len, &offset);
4576
4577                         memcpy_page(new->rq_pages[j], offset,
4578                                     old->rq_pages[j], offset, len);
4579                 }
4580         }
4581
4582         /* fill the 1st iov with a transform header */
4583         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4584
4585         rc = crypt_message(server, num_rqst, new_rq, 1);
4586         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4587         if (rc)
4588                 goto err_free;
4589
4590         return rc;
4591
4592 err_free:
4593         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4594         return rc;
4595 }
4596
4597 static int
4598 smb3_is_transform_hdr(void *buf)
4599 {
4600         struct smb2_transform_hdr *trhdr = buf;
4601
4602         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4603 }
4604
4605 static int
4606 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4607                  unsigned int buf_data_size, struct page **pages,
4608                  unsigned int npages, unsigned int page_data_size,
4609                  bool is_offloaded)
4610 {
4611         struct kvec iov[2];
4612         struct smb_rqst rqst = {NULL};
4613         int rc;
4614
4615         iov[0].iov_base = buf;
4616         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4617         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4618         iov[1].iov_len = buf_data_size;
4619
4620         rqst.rq_iov = iov;
4621         rqst.rq_nvec = 2;
4622         rqst.rq_pages = pages;
4623         rqst.rq_npages = npages;
4624         rqst.rq_pagesz = PAGE_SIZE;
4625         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
4626
4627         rc = crypt_message(server, 1, &rqst, 0);
4628         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4629
4630         if (rc)
4631                 return rc;
4632
4633         memmove(buf, iov[1].iov_base, buf_data_size);
4634
4635         if (!is_offloaded)
4636                 server->total_read = buf_data_size + page_data_size;
4637
4638         return rc;
4639 }
4640
4641 static int
4642 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4643                      unsigned int npages, unsigned int len)
4644 {
4645         int i;
4646         int length;
4647
4648         for (i = 0; i < npages; i++) {
4649                 struct page *page = pages[i];
4650                 size_t n;
4651
4652                 n = len;
4653                 if (len >= PAGE_SIZE) {
4654                         /* enough data to fill the page */
4655                         n = PAGE_SIZE;
4656                         len -= n;
4657                 } else {
4658                         zero_user(page, len, PAGE_SIZE - len);
4659                         len = 0;
4660                 }
4661                 length = cifs_read_page_from_socket(server, page, 0, n);
4662                 if (length < 0)
4663                         return length;
4664                 server->total_read += length;
4665         }
4666
4667         return 0;
4668 }
4669
4670 static int
4671 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4672                unsigned int cur_off, struct bio_vec **page_vec)
4673 {
4674         struct bio_vec *bvec;
4675         int i;
4676
4677         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4678         if (!bvec)
4679                 return -ENOMEM;
4680
4681         for (i = 0; i < npages; i++) {
4682                 bvec[i].bv_page = pages[i];
4683                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4684                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4685                 data_size -= bvec[i].bv_len;
4686         }
4687
4688         if (data_size != 0) {
4689                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4690                 kfree(bvec);
4691                 return -EIO;
4692         }
4693
4694         *page_vec = bvec;
4695         return 0;
4696 }
4697
4698 static int
4699 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4700                  char *buf, unsigned int buf_len, struct page **pages,
4701                  unsigned int npages, unsigned int page_data_size,
4702                  bool is_offloaded)
4703 {
4704         unsigned int data_offset;
4705         unsigned int data_len;
4706         unsigned int cur_off;
4707         unsigned int cur_page_idx;
4708         unsigned int pad_len;
4709         struct cifs_readdata *rdata = mid->callback_data;
4710         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4711         struct bio_vec *bvec = NULL;
4712         struct iov_iter iter;
4713         struct kvec iov;
4714         int length;
4715         bool use_rdma_mr = false;
4716
4717         if (shdr->Command != SMB2_READ) {
4718                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4719                 return -ENOTSUPP;
4720         }
4721
4722         if (server->ops->is_session_expired &&
4723             server->ops->is_session_expired(buf)) {
4724                 if (!is_offloaded)
4725                         cifs_reconnect(server, true);
4726                 return -1;
4727         }
4728
4729         if (server->ops->is_status_pending &&
4730                         server->ops->is_status_pending(buf, server))
4731                 return -1;
4732
4733         /* set up first two iov to get credits */
4734         rdata->iov[0].iov_base = buf;
4735         rdata->iov[0].iov_len = 0;
4736         rdata->iov[1].iov_base = buf;
4737         rdata->iov[1].iov_len =
4738                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4739         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4740                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4741         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4742                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4743
4744         rdata->result = server->ops->map_error(buf, true);
4745         if (rdata->result != 0) {
4746                 cifs_dbg(FYI, "%s: server returned error %d\n",
4747                          __func__, rdata->result);
4748                 /* normal error on read response */
4749                 if (is_offloaded)
4750                         mid->mid_state = MID_RESPONSE_RECEIVED;
4751                 else
4752                         dequeue_mid(mid, false);
4753                 return 0;
4754         }
4755
4756         data_offset = server->ops->read_data_offset(buf);
4757 #ifdef CONFIG_CIFS_SMB_DIRECT
4758         use_rdma_mr = rdata->mr;
4759 #endif
4760         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4761
4762         if (data_offset < server->vals->read_rsp_size) {
4763                 /*
4764                  * win2k8 sometimes sends an offset of 0 when the read
4765                  * is beyond the EOF. Treat it as if the data starts just after
4766                  * the header.
4767                  */
4768                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4769                          __func__, data_offset);
4770                 data_offset = server->vals->read_rsp_size;
4771         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4772                 /* data_offset is beyond the end of smallbuf */
4773                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4774                          __func__, data_offset);
4775                 rdata->result = -EIO;
4776                 if (is_offloaded)
4777                         mid->mid_state = MID_RESPONSE_MALFORMED;
4778                 else
4779                         dequeue_mid(mid, rdata->result);
4780                 return 0;
4781         }
4782
4783         pad_len = data_offset - server->vals->read_rsp_size;
4784
4785         if (buf_len <= data_offset) {
4786                 /* read response payload is in pages */
4787                 cur_page_idx = pad_len / PAGE_SIZE;
4788                 cur_off = pad_len % PAGE_SIZE;
4789
4790                 if (cur_page_idx != 0) {
4791                         /* data offset is beyond the 1st page of response */
4792                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4793                                  __func__, data_offset);
4794                         rdata->result = -EIO;
4795                         if (is_offloaded)
4796                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4797                         else
4798                                 dequeue_mid(mid, rdata->result);
4799                         return 0;
4800                 }
4801
4802                 if (data_len > page_data_size - pad_len) {
4803                         /* data_len is corrupt -- discard frame */
4804                         rdata->result = -EIO;
4805                         if (is_offloaded)
4806                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4807                         else
4808                                 dequeue_mid(mid, rdata->result);
4809                         return 0;
4810                 }
4811
4812                 rdata->result = init_read_bvec(pages, npages, page_data_size,
4813                                                cur_off, &bvec);
4814                 if (rdata->result != 0) {
4815                         if (is_offloaded)
4816                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4817                         else
4818                                 dequeue_mid(mid, rdata->result);
4819                         return 0;
4820                 }
4821
4822                 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4823         } else if (buf_len >= data_offset + data_len) {
4824                 /* read response payload is in buf */
4825                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4826                 iov.iov_base = buf + data_offset;
4827                 iov.iov_len = data_len;
4828                 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4829         } else {
4830                 /* read response payload cannot be in both buf and pages */
4831                 WARN_ONCE(1, "buf can not contain only a part of read data");
4832                 rdata->result = -EIO;
4833                 if (is_offloaded)
4834                         mid->mid_state = MID_RESPONSE_MALFORMED;
4835                 else
4836                         dequeue_mid(mid, rdata->result);
4837                 return 0;
4838         }
4839
4840         length = rdata->copy_into_pages(server, rdata, &iter);
4841
4842         kfree(bvec);
4843
4844         if (length < 0)
4845                 return length;
4846
4847         if (is_offloaded)
4848                 mid->mid_state = MID_RESPONSE_RECEIVED;
4849         else
4850                 dequeue_mid(mid, false);
4851         return length;
4852 }
4853
4854 struct smb2_decrypt_work {
4855         struct work_struct decrypt;
4856         struct TCP_Server_Info *server;
4857         struct page **ppages;
4858         char *buf;
4859         unsigned int npages;
4860         unsigned int len;
4861 };
4862
4863
4864 static void smb2_decrypt_offload(struct work_struct *work)
4865 {
4866         struct smb2_decrypt_work *dw = container_of(work,
4867                                 struct smb2_decrypt_work, decrypt);
4868         int i, rc;
4869         struct mid_q_entry *mid;
4870
4871         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4872                               dw->ppages, dw->npages, dw->len, true);
4873         if (rc) {
4874                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4875                 goto free_pages;
4876         }
4877
4878         dw->server->lstrp = jiffies;
4879         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4880         if (mid == NULL)
4881                 cifs_dbg(FYI, "mid not found\n");
4882         else {
4883                 mid->decrypted = true;
4884                 rc = handle_read_data(dw->server, mid, dw->buf,
4885                                       dw->server->vals->read_rsp_size,
4886                                       dw->ppages, dw->npages, dw->len,
4887                                       true);
4888                 if (rc >= 0) {
4889 #ifdef CONFIG_CIFS_STATS2
4890                         mid->when_received = jiffies;
4891 #endif
4892                         if (dw->server->ops->is_network_name_deleted)
4893                                 dw->server->ops->is_network_name_deleted(dw->buf,
4894                                                                          dw->server);
4895
4896                         mid->callback(mid);
4897                 } else {
4898                         spin_lock(&dw->server->srv_lock);
4899                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4900                                 spin_lock(&dw->server->mid_lock);
4901                                 mid->mid_state = MID_RETRY_NEEDED;
4902                                 spin_unlock(&dw->server->mid_lock);
4903                                 spin_unlock(&dw->server->srv_lock);
4904                                 mid->callback(mid);
4905                         } else {
4906                                 spin_lock(&dw->server->mid_lock);
4907                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4908                                 mid->mid_flags &= ~(MID_DELETED);
4909                                 list_add_tail(&mid->qhead,
4910                                         &dw->server->pending_mid_q);
4911                                 spin_unlock(&dw->server->mid_lock);
4912                                 spin_unlock(&dw->server->srv_lock);
4913                         }
4914                 }
4915                 release_mid(mid);
4916         }
4917
4918 free_pages:
4919         for (i = dw->npages-1; i >= 0; i--)
4920                 put_page(dw->ppages[i]);
4921
4922         kfree(dw->ppages);
4923         cifs_small_buf_release(dw->buf);
4924         kfree(dw);
4925 }
4926
4927
4928 static int
4929 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4930                        int *num_mids)
4931 {
4932         char *buf = server->smallbuf;
4933         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4934         unsigned int npages;
4935         struct page **pages;
4936         unsigned int len;
4937         unsigned int buflen = server->pdu_size;
4938         int rc;
4939         int i = 0;
4940         struct smb2_decrypt_work *dw;
4941
4942         *num_mids = 1;
4943         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4944                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4945
4946         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4947         if (rc < 0)
4948                 return rc;
4949         server->total_read += rc;
4950
4951         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4952                 server->vals->read_rsp_size;
4953         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4954
4955         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4956         if (!pages) {
4957                 rc = -ENOMEM;
4958                 goto discard_data;
4959         }
4960
4961         for (; i < npages; i++) {
4962                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4963                 if (!pages[i]) {
4964                         rc = -ENOMEM;
4965                         goto discard_data;
4966                 }
4967         }
4968
4969         /* read read data into pages */
4970         rc = read_data_into_pages(server, pages, npages, len);
4971         if (rc)
4972                 goto free_pages;
4973
4974         rc = cifs_discard_remaining_data(server);
4975         if (rc)
4976                 goto free_pages;
4977
4978         /*
4979          * For large reads, offload to different thread for better performance,
4980          * use more cores decrypting which can be expensive
4981          */
4982
4983         if ((server->min_offload) && (server->in_flight > 1) &&
4984             (server->pdu_size >= server->min_offload)) {
4985                 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4986                 if (dw == NULL)
4987                         goto non_offloaded_decrypt;
4988
4989                 dw->buf = server->smallbuf;
4990                 server->smallbuf = (char *)cifs_small_buf_get();
4991
4992                 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4993
4994                 dw->npages = npages;
4995                 dw->server = server;
4996                 dw->ppages = pages;
4997                 dw->len = len;
4998                 queue_work(decrypt_wq, &dw->decrypt);
4999                 *num_mids = 0; /* worker thread takes care of finding mid */
5000                 return -1;
5001         }
5002
5003 non_offloaded_decrypt:
5004         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
5005                               pages, npages, len, false);
5006         if (rc)
5007                 goto free_pages;
5008
5009         *mid = smb2_find_mid(server, buf);
5010         if (*mid == NULL)
5011                 cifs_dbg(FYI, "mid not found\n");
5012         else {
5013                 cifs_dbg(FYI, "mid found\n");
5014                 (*mid)->decrypted = true;
5015                 rc = handle_read_data(server, *mid, buf,
5016                                       server->vals->read_rsp_size,
5017                                       pages, npages, len, false);
5018                 if (rc >= 0) {
5019                         if (server->ops->is_network_name_deleted) {
5020                                 server->ops->is_network_name_deleted(buf,
5021                                                                 server);
5022                         }
5023                 }
5024         }
5025
5026 free_pages:
5027         for (i = i - 1; i >= 0; i--)
5028                 put_page(pages[i]);
5029         kfree(pages);
5030         return rc;
5031 discard_data:
5032         cifs_discard_remaining_data(server);
5033         goto free_pages;
5034 }
5035
5036 static int
5037 receive_encrypted_standard(struct TCP_Server_Info *server,
5038                            struct mid_q_entry **mids, char **bufs,
5039                            int *num_mids)
5040 {
5041         int ret, length;
5042         char *buf = server->smallbuf;
5043         struct smb2_hdr *shdr;
5044         unsigned int pdu_length = server->pdu_size;
5045         unsigned int buf_size;
5046         struct mid_q_entry *mid_entry;
5047         int next_is_large;
5048         char *next_buffer = NULL;
5049
5050         *num_mids = 0;
5051
5052         /* switch to large buffer if too big for a small one */
5053         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
5054                 server->large_buf = true;
5055                 memcpy(server->bigbuf, buf, server->total_read);
5056                 buf = server->bigbuf;
5057         }
5058
5059         /* now read the rest */
5060         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
5061                                 pdu_length - HEADER_SIZE(server) + 1);
5062         if (length < 0)
5063                 return length;
5064         server->total_read += length;
5065
5066         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
5067         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0, false);
5068         if (length)
5069                 return length;
5070
5071         next_is_large = server->large_buf;
5072 one_more:
5073         shdr = (struct smb2_hdr *)buf;
5074         if (shdr->NextCommand) {
5075                 if (next_is_large)
5076                         next_buffer = (char *)cifs_buf_get();
5077                 else
5078                         next_buffer = (char *)cifs_small_buf_get();
5079                 memcpy(next_buffer,
5080                        buf + le32_to_cpu(shdr->NextCommand),
5081                        pdu_length - le32_to_cpu(shdr->NextCommand));
5082         }
5083
5084         mid_entry = smb2_find_mid(server, buf);
5085         if (mid_entry == NULL)
5086                 cifs_dbg(FYI, "mid not found\n");
5087         else {
5088                 cifs_dbg(FYI, "mid found\n");
5089                 mid_entry->decrypted = true;
5090                 mid_entry->resp_buf_size = server->pdu_size;
5091         }
5092
5093         if (*num_mids >= MAX_COMPOUND) {
5094                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
5095                 return -1;
5096         }
5097         bufs[*num_mids] = buf;
5098         mids[(*num_mids)++] = mid_entry;
5099
5100         if (mid_entry && mid_entry->handle)
5101                 ret = mid_entry->handle(server, mid_entry);
5102         else
5103                 ret = cifs_handle_standard(server, mid_entry);
5104
5105         if (ret == 0 && shdr->NextCommand) {
5106                 pdu_length -= le32_to_cpu(shdr->NextCommand);
5107                 server->large_buf = next_is_large;
5108                 if (next_is_large)
5109                         server->bigbuf = buf = next_buffer;
5110                 else
5111                         server->smallbuf = buf = next_buffer;
5112                 goto one_more;
5113         } else if (ret != 0) {
5114                 /*
5115                  * ret != 0 here means that we didn't get to handle_mid() thus
5116                  * server->smallbuf and server->bigbuf are still valid. We need
5117                  * to free next_buffer because it is not going to be used
5118                  * anywhere.
5119                  */
5120                 if (next_is_large)
5121                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5122                 else
5123                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5124         }
5125
5126         return ret;
5127 }
5128
5129 static int
5130 smb3_receive_transform(struct TCP_Server_Info *server,
5131                        struct mid_q_entry **mids, char **bufs, int *num_mids)
5132 {
5133         char *buf = server->smallbuf;
5134         unsigned int pdu_length = server->pdu_size;
5135         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5136         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5137
5138         if (pdu_length < sizeof(struct smb2_transform_hdr) +
5139                                                 sizeof(struct smb2_hdr)) {
5140                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5141                          pdu_length);
5142                 cifs_reconnect(server, true);
5143                 return -ECONNABORTED;
5144         }
5145
5146         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5147                 cifs_server_dbg(VFS, "Transform message is broken\n");
5148                 cifs_reconnect(server, true);
5149                 return -ECONNABORTED;
5150         }
5151
5152         /* TODO: add support for compounds containing READ. */
5153         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5154                 return receive_encrypted_read(server, &mids[0], num_mids);
5155         }
5156
5157         return receive_encrypted_standard(server, mids, bufs, num_mids);
5158 }
5159
5160 int
5161 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5162 {
5163         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5164
5165         return handle_read_data(server, mid, buf, server->pdu_size,
5166                                 NULL, 0, 0, false);
5167 }
5168
5169 static int
5170 smb2_next_header(char *buf)
5171 {
5172         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5173         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5174
5175         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5176                 return sizeof(struct smb2_transform_hdr) +
5177                   le32_to_cpu(t_hdr->OriginalMessageSize);
5178
5179         return le32_to_cpu(hdr->NextCommand);
5180 }
5181
5182 static int
5183 smb2_make_node(unsigned int xid, struct inode *inode,
5184                struct dentry *dentry, struct cifs_tcon *tcon,
5185                const char *full_path, umode_t mode, dev_t dev)
5186 {
5187         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5188         int rc = -EPERM;
5189         struct cifs_open_info_data buf = {};
5190         struct cifs_io_parms io_parms = {0};
5191         __u32 oplock = 0;
5192         struct cifs_fid fid;
5193         struct cifs_open_parms oparms;
5194         unsigned int bytes_written;
5195         struct win_dev *pdev;
5196         struct kvec iov[2];
5197
5198         /*
5199          * Check if mounted with mount parm 'sfu' mount parm.
5200          * SFU emulation should work with all servers, but only
5201          * supports block and char device (no socket & fifo),
5202          * and was used by default in earlier versions of Windows
5203          */
5204         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5205                 return rc;
5206
5207         /*
5208          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5209          * their current NFS server) uses this approach to expose special files
5210          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5211          */
5212
5213         if (!S_ISCHR(mode) && !S_ISBLK(mode))
5214                 return rc;
5215
5216         cifs_dbg(FYI, "sfu compat create special file\n");
5217
5218         oparms = (struct cifs_open_parms) {
5219                 .tcon = tcon,
5220                 .cifs_sb = cifs_sb,
5221                 .desired_access = GENERIC_WRITE,
5222                 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5223                                                       CREATE_OPTION_SPECIAL),
5224                 .disposition = FILE_CREATE,
5225                 .path = full_path,
5226                 .fid = &fid,
5227         };
5228
5229         if (tcon->ses->server->oplocks)
5230                 oplock = REQ_OPLOCK;
5231         else
5232                 oplock = 0;
5233         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf);
5234         if (rc)
5235                 return rc;
5236
5237         /*
5238          * BB Do not bother to decode buf since no local inode yet to put
5239          * timestamps in, but we can reuse it safely.
5240          */
5241
5242         pdev = (struct win_dev *)&buf.fi;
5243         io_parms.pid = current->tgid;
5244         io_parms.tcon = tcon;
5245         io_parms.offset = 0;
5246         io_parms.length = sizeof(struct win_dev);
5247         iov[1].iov_base = &buf.fi;
5248         iov[1].iov_len = sizeof(struct win_dev);
5249         if (S_ISCHR(mode)) {
5250                 memcpy(pdev->type, "IntxCHR", 8);
5251                 pdev->major = cpu_to_le64(MAJOR(dev));
5252                 pdev->minor = cpu_to_le64(MINOR(dev));
5253                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5254                                                         &bytes_written, iov, 1);
5255         } else if (S_ISBLK(mode)) {
5256                 memcpy(pdev->type, "IntxBLK", 8);
5257                 pdev->major = cpu_to_le64(MAJOR(dev));
5258                 pdev->minor = cpu_to_le64(MINOR(dev));
5259                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5260                                                         &bytes_written, iov, 1);
5261         }
5262         tcon->ses->server->ops->close(xid, tcon, &fid);
5263         d_drop(dentry);
5264
5265         /* FIXME: add code here to set EAs */
5266
5267         cifs_free_open_info(&buf);
5268         return rc;
5269 }
5270
5271 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5272 struct smb_version_operations smb20_operations = {
5273         .compare_fids = smb2_compare_fids,
5274         .setup_request = smb2_setup_request,
5275         .setup_async_request = smb2_setup_async_request,
5276         .check_receive = smb2_check_receive,
5277         .add_credits = smb2_add_credits,
5278         .set_credits = smb2_set_credits,
5279         .get_credits_field = smb2_get_credits_field,
5280         .get_credits = smb2_get_credits,
5281         .wait_mtu_credits = cifs_wait_mtu_credits,
5282         .get_next_mid = smb2_get_next_mid,
5283         .revert_current_mid = smb2_revert_current_mid,
5284         .read_data_offset = smb2_read_data_offset,
5285         .read_data_length = smb2_read_data_length,
5286         .map_error = map_smb2_to_linux_error,
5287         .find_mid = smb2_find_mid,
5288         .check_message = smb2_check_message,
5289         .dump_detail = smb2_dump_detail,
5290         .clear_stats = smb2_clear_stats,
5291         .print_stats = smb2_print_stats,
5292         .is_oplock_break = smb2_is_valid_oplock_break,
5293         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5294         .downgrade_oplock = smb2_downgrade_oplock,
5295         .need_neg = smb2_need_neg,
5296         .negotiate = smb2_negotiate,
5297         .negotiate_wsize = smb2_negotiate_wsize,
5298         .negotiate_rsize = smb2_negotiate_rsize,
5299         .sess_setup = SMB2_sess_setup,
5300         .logoff = SMB2_logoff,
5301         .tree_connect = SMB2_tcon,
5302         .tree_disconnect = SMB2_tdis,
5303         .qfs_tcon = smb2_qfs_tcon,
5304         .is_path_accessible = smb2_is_path_accessible,
5305         .can_echo = smb2_can_echo,
5306         .echo = SMB2_echo,
5307         .query_path_info = smb2_query_path_info,
5308         .get_srv_inum = smb2_get_srv_inum,
5309         .query_file_info = smb2_query_file_info,
5310         .set_path_size = smb2_set_path_size,
5311         .set_file_size = smb2_set_file_size,
5312         .set_file_info = smb2_set_file_info,
5313         .set_compression = smb2_set_compression,
5314         .mkdir = smb2_mkdir,
5315         .mkdir_setinfo = smb2_mkdir_setinfo,
5316         .rmdir = smb2_rmdir,
5317         .unlink = smb2_unlink,
5318         .rename = smb2_rename_path,
5319         .create_hardlink = smb2_create_hardlink,
5320         .query_symlink = smb2_query_symlink,
5321         .query_mf_symlink = smb3_query_mf_symlink,
5322         .create_mf_symlink = smb3_create_mf_symlink,
5323         .open = smb2_open_file,
5324         .set_fid = smb2_set_fid,
5325         .close = smb2_close_file,
5326         .flush = smb2_flush_file,
5327         .async_readv = smb2_async_readv,
5328         .async_writev = smb2_async_writev,
5329         .sync_read = smb2_sync_read,
5330         .sync_write = smb2_sync_write,
5331         .query_dir_first = smb2_query_dir_first,
5332         .query_dir_next = smb2_query_dir_next,
5333         .close_dir = smb2_close_dir,
5334         .calc_smb_size = smb2_calc_size,
5335         .is_status_pending = smb2_is_status_pending,
5336         .is_session_expired = smb2_is_session_expired,
5337         .oplock_response = smb2_oplock_response,
5338         .queryfs = smb2_queryfs,
5339         .mand_lock = smb2_mand_lock,
5340         .mand_unlock_range = smb2_unlock_range,
5341         .push_mand_locks = smb2_push_mandatory_locks,
5342         .get_lease_key = smb2_get_lease_key,
5343         .set_lease_key = smb2_set_lease_key,
5344         .new_lease_key = smb2_new_lease_key,
5345         .calc_signature = smb2_calc_signature,
5346         .is_read_op = smb2_is_read_op,
5347         .set_oplock_level = smb2_set_oplock_level,
5348         .create_lease_buf = smb2_create_lease_buf,
5349         .parse_lease_buf = smb2_parse_lease_buf,
5350         .copychunk_range = smb2_copychunk_range,
5351         .wp_retry_size = smb2_wp_retry_size,
5352         .dir_needs_close = smb2_dir_needs_close,
5353         .get_dfs_refer = smb2_get_dfs_refer,
5354         .select_sectype = smb2_select_sectype,
5355 #ifdef CONFIG_CIFS_XATTR
5356         .query_all_EAs = smb2_query_eas,
5357         .set_EA = smb2_set_ea,
5358 #endif /* CIFS_XATTR */
5359         .get_acl = get_smb2_acl,
5360         .get_acl_by_fid = get_smb2_acl_by_fid,
5361         .set_acl = set_smb2_acl,
5362         .next_header = smb2_next_header,
5363         .ioctl_query_info = smb2_ioctl_query_info,
5364         .make_node = smb2_make_node,
5365         .fiemap = smb3_fiemap,
5366         .llseek = smb3_llseek,
5367         .is_status_io_timeout = smb2_is_status_io_timeout,
5368         .is_network_name_deleted = smb2_is_network_name_deleted,
5369 };
5370 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5371
5372 struct smb_version_operations smb21_operations = {
5373         .compare_fids = smb2_compare_fids,
5374         .setup_request = smb2_setup_request,
5375         .setup_async_request = smb2_setup_async_request,
5376         .check_receive = smb2_check_receive,
5377         .add_credits = smb2_add_credits,
5378         .set_credits = smb2_set_credits,
5379         .get_credits_field = smb2_get_credits_field,
5380         .get_credits = smb2_get_credits,
5381         .wait_mtu_credits = smb2_wait_mtu_credits,
5382         .adjust_credits = smb2_adjust_credits,
5383         .get_next_mid = smb2_get_next_mid,
5384         .revert_current_mid = smb2_revert_current_mid,
5385         .read_data_offset = smb2_read_data_offset,
5386         .read_data_length = smb2_read_data_length,
5387         .map_error = map_smb2_to_linux_error,
5388         .find_mid = smb2_find_mid,
5389         .check_message = smb2_check_message,
5390         .dump_detail = smb2_dump_detail,
5391         .clear_stats = smb2_clear_stats,
5392         .print_stats = smb2_print_stats,
5393         .is_oplock_break = smb2_is_valid_oplock_break,
5394         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5395         .downgrade_oplock = smb2_downgrade_oplock,
5396         .need_neg = smb2_need_neg,
5397         .negotiate = smb2_negotiate,
5398         .negotiate_wsize = smb2_negotiate_wsize,
5399         .negotiate_rsize = smb2_negotiate_rsize,
5400         .sess_setup = SMB2_sess_setup,
5401         .logoff = SMB2_logoff,
5402         .tree_connect = SMB2_tcon,
5403         .tree_disconnect = SMB2_tdis,
5404         .qfs_tcon = smb2_qfs_tcon,
5405         .is_path_accessible = smb2_is_path_accessible,
5406         .can_echo = smb2_can_echo,
5407         .echo = SMB2_echo,
5408         .query_path_info = smb2_query_path_info,
5409         .get_srv_inum = smb2_get_srv_inum,
5410         .query_file_info = smb2_query_file_info,
5411         .set_path_size = smb2_set_path_size,
5412         .set_file_size = smb2_set_file_size,
5413         .set_file_info = smb2_set_file_info,
5414         .set_compression = smb2_set_compression,
5415         .mkdir = smb2_mkdir,
5416         .mkdir_setinfo = smb2_mkdir_setinfo,
5417         .rmdir = smb2_rmdir,
5418         .unlink = smb2_unlink,
5419         .rename = smb2_rename_path,
5420         .create_hardlink = smb2_create_hardlink,
5421         .query_symlink = smb2_query_symlink,
5422         .query_mf_symlink = smb3_query_mf_symlink,
5423         .create_mf_symlink = smb3_create_mf_symlink,
5424         .open = smb2_open_file,
5425         .set_fid = smb2_set_fid,
5426         .close = smb2_close_file,
5427         .flush = smb2_flush_file,
5428         .async_readv = smb2_async_readv,
5429         .async_writev = smb2_async_writev,
5430         .sync_read = smb2_sync_read,
5431         .sync_write = smb2_sync_write,
5432         .query_dir_first = smb2_query_dir_first,
5433         .query_dir_next = smb2_query_dir_next,
5434         .close_dir = smb2_close_dir,
5435         .calc_smb_size = smb2_calc_size,
5436         .is_status_pending = smb2_is_status_pending,
5437         .is_session_expired = smb2_is_session_expired,
5438         .oplock_response = smb2_oplock_response,
5439         .queryfs = smb2_queryfs,
5440         .mand_lock = smb2_mand_lock,
5441         .mand_unlock_range = smb2_unlock_range,
5442         .push_mand_locks = smb2_push_mandatory_locks,
5443         .get_lease_key = smb2_get_lease_key,
5444         .set_lease_key = smb2_set_lease_key,
5445         .new_lease_key = smb2_new_lease_key,
5446         .calc_signature = smb2_calc_signature,
5447         .is_read_op = smb21_is_read_op,
5448         .set_oplock_level = smb21_set_oplock_level,
5449         .create_lease_buf = smb2_create_lease_buf,
5450         .parse_lease_buf = smb2_parse_lease_buf,
5451         .copychunk_range = smb2_copychunk_range,
5452         .wp_retry_size = smb2_wp_retry_size,
5453         .dir_needs_close = smb2_dir_needs_close,
5454         .enum_snapshots = smb3_enum_snapshots,
5455         .notify = smb3_notify,
5456         .get_dfs_refer = smb2_get_dfs_refer,
5457         .select_sectype = smb2_select_sectype,
5458 #ifdef CONFIG_CIFS_XATTR
5459         .query_all_EAs = smb2_query_eas,
5460         .set_EA = smb2_set_ea,
5461 #endif /* CIFS_XATTR */
5462         .get_acl = get_smb2_acl,
5463         .get_acl_by_fid = get_smb2_acl_by_fid,
5464         .set_acl = set_smb2_acl,
5465         .next_header = smb2_next_header,
5466         .ioctl_query_info = smb2_ioctl_query_info,
5467         .make_node = smb2_make_node,
5468         .fiemap = smb3_fiemap,
5469         .llseek = smb3_llseek,
5470         .is_status_io_timeout = smb2_is_status_io_timeout,
5471         .is_network_name_deleted = smb2_is_network_name_deleted,
5472 };
5473
5474 struct smb_version_operations smb30_operations = {
5475         .compare_fids = smb2_compare_fids,
5476         .setup_request = smb2_setup_request,
5477         .setup_async_request = smb2_setup_async_request,
5478         .check_receive = smb2_check_receive,
5479         .add_credits = smb2_add_credits,
5480         .set_credits = smb2_set_credits,
5481         .get_credits_field = smb2_get_credits_field,
5482         .get_credits = smb2_get_credits,
5483         .wait_mtu_credits = smb2_wait_mtu_credits,
5484         .adjust_credits = smb2_adjust_credits,
5485         .get_next_mid = smb2_get_next_mid,
5486         .revert_current_mid = smb2_revert_current_mid,
5487         .read_data_offset = smb2_read_data_offset,
5488         .read_data_length = smb2_read_data_length,
5489         .map_error = map_smb2_to_linux_error,
5490         .find_mid = smb2_find_mid,
5491         .check_message = smb2_check_message,
5492         .dump_detail = smb2_dump_detail,
5493         .clear_stats = smb2_clear_stats,
5494         .print_stats = smb2_print_stats,
5495         .dump_share_caps = smb2_dump_share_caps,
5496         .is_oplock_break = smb2_is_valid_oplock_break,
5497         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5498         .downgrade_oplock = smb3_downgrade_oplock,
5499         .need_neg = smb2_need_neg,
5500         .negotiate = smb2_negotiate,
5501         .negotiate_wsize = smb3_negotiate_wsize,
5502         .negotiate_rsize = smb3_negotiate_rsize,
5503         .sess_setup = SMB2_sess_setup,
5504         .logoff = SMB2_logoff,
5505         .tree_connect = SMB2_tcon,
5506         .tree_disconnect = SMB2_tdis,
5507         .qfs_tcon = smb3_qfs_tcon,
5508         .is_path_accessible = smb2_is_path_accessible,
5509         .can_echo = smb2_can_echo,
5510         .echo = SMB2_echo,
5511         .query_path_info = smb2_query_path_info,
5512         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5513         .query_reparse_tag = smb2_query_reparse_tag,
5514         .get_srv_inum = smb2_get_srv_inum,
5515         .query_file_info = smb2_query_file_info,
5516         .set_path_size = smb2_set_path_size,
5517         .set_file_size = smb2_set_file_size,
5518         .set_file_info = smb2_set_file_info,
5519         .set_compression = smb2_set_compression,
5520         .mkdir = smb2_mkdir,
5521         .mkdir_setinfo = smb2_mkdir_setinfo,
5522         .rmdir = smb2_rmdir,
5523         .unlink = smb2_unlink,
5524         .rename = smb2_rename_path,
5525         .create_hardlink = smb2_create_hardlink,
5526         .query_symlink = smb2_query_symlink,
5527         .query_mf_symlink = smb3_query_mf_symlink,
5528         .create_mf_symlink = smb3_create_mf_symlink,
5529         .open = smb2_open_file,
5530         .set_fid = smb2_set_fid,
5531         .close = smb2_close_file,
5532         .close_getattr = smb2_close_getattr,
5533         .flush = smb2_flush_file,
5534         .async_readv = smb2_async_readv,
5535         .async_writev = smb2_async_writev,
5536         .sync_read = smb2_sync_read,
5537         .sync_write = smb2_sync_write,
5538         .query_dir_first = smb2_query_dir_first,
5539         .query_dir_next = smb2_query_dir_next,
5540         .close_dir = smb2_close_dir,
5541         .calc_smb_size = smb2_calc_size,
5542         .is_status_pending = smb2_is_status_pending,
5543         .is_session_expired = smb2_is_session_expired,
5544         .oplock_response = smb2_oplock_response,
5545         .queryfs = smb2_queryfs,
5546         .mand_lock = smb2_mand_lock,
5547         .mand_unlock_range = smb2_unlock_range,
5548         .push_mand_locks = smb2_push_mandatory_locks,
5549         .get_lease_key = smb2_get_lease_key,
5550         .set_lease_key = smb2_set_lease_key,
5551         .new_lease_key = smb2_new_lease_key,
5552         .generate_signingkey = generate_smb30signingkey,
5553         .calc_signature = smb3_calc_signature,
5554         .set_integrity  = smb3_set_integrity,
5555         .is_read_op = smb21_is_read_op,
5556         .set_oplock_level = smb3_set_oplock_level,
5557         .create_lease_buf = smb3_create_lease_buf,
5558         .parse_lease_buf = smb3_parse_lease_buf,
5559         .copychunk_range = smb2_copychunk_range,
5560         .duplicate_extents = smb2_duplicate_extents,
5561         .validate_negotiate = smb3_validate_negotiate,
5562         .wp_retry_size = smb2_wp_retry_size,
5563         .dir_needs_close = smb2_dir_needs_close,
5564         .fallocate = smb3_fallocate,
5565         .enum_snapshots = smb3_enum_snapshots,
5566         .notify = smb3_notify,
5567         .init_transform_rq = smb3_init_transform_rq,
5568         .is_transform_hdr = smb3_is_transform_hdr,
5569         .receive_transform = smb3_receive_transform,
5570         .get_dfs_refer = smb2_get_dfs_refer,
5571         .select_sectype = smb2_select_sectype,
5572 #ifdef CONFIG_CIFS_XATTR
5573         .query_all_EAs = smb2_query_eas,
5574         .set_EA = smb2_set_ea,
5575 #endif /* CIFS_XATTR */
5576         .get_acl = get_smb2_acl,
5577         .get_acl_by_fid = get_smb2_acl_by_fid,
5578         .set_acl = set_smb2_acl,
5579         .next_header = smb2_next_header,
5580         .ioctl_query_info = smb2_ioctl_query_info,
5581         .make_node = smb2_make_node,
5582         .fiemap = smb3_fiemap,
5583         .llseek = smb3_llseek,
5584         .is_status_io_timeout = smb2_is_status_io_timeout,
5585         .is_network_name_deleted = smb2_is_network_name_deleted,
5586 };
5587
5588 struct smb_version_operations smb311_operations = {
5589         .compare_fids = smb2_compare_fids,
5590         .setup_request = smb2_setup_request,
5591         .setup_async_request = smb2_setup_async_request,
5592         .check_receive = smb2_check_receive,
5593         .add_credits = smb2_add_credits,
5594         .set_credits = smb2_set_credits,
5595         .get_credits_field = smb2_get_credits_field,
5596         .get_credits = smb2_get_credits,
5597         .wait_mtu_credits = smb2_wait_mtu_credits,
5598         .adjust_credits = smb2_adjust_credits,
5599         .get_next_mid = smb2_get_next_mid,
5600         .revert_current_mid = smb2_revert_current_mid,
5601         .read_data_offset = smb2_read_data_offset,
5602         .read_data_length = smb2_read_data_length,
5603         .map_error = map_smb2_to_linux_error,
5604         .find_mid = smb2_find_mid,
5605         .check_message = smb2_check_message,
5606         .dump_detail = smb2_dump_detail,
5607         .clear_stats = smb2_clear_stats,
5608         .print_stats = smb2_print_stats,
5609         .dump_share_caps = smb2_dump_share_caps,
5610         .is_oplock_break = smb2_is_valid_oplock_break,
5611         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5612         .downgrade_oplock = smb3_downgrade_oplock,
5613         .need_neg = smb2_need_neg,
5614         .negotiate = smb2_negotiate,
5615         .negotiate_wsize = smb3_negotiate_wsize,
5616         .negotiate_rsize = smb3_negotiate_rsize,
5617         .sess_setup = SMB2_sess_setup,
5618         .logoff = SMB2_logoff,
5619         .tree_connect = SMB2_tcon,
5620         .tree_disconnect = SMB2_tdis,
5621         .qfs_tcon = smb3_qfs_tcon,
5622         .is_path_accessible = smb2_is_path_accessible,
5623         .can_echo = smb2_can_echo,
5624         .echo = SMB2_echo,
5625         .query_path_info = smb2_query_path_info,
5626         .query_reparse_tag = smb2_query_reparse_tag,
5627         .get_srv_inum = smb2_get_srv_inum,
5628         .query_file_info = smb2_query_file_info,
5629         .set_path_size = smb2_set_path_size,
5630         .set_file_size = smb2_set_file_size,
5631         .set_file_info = smb2_set_file_info,
5632         .set_compression = smb2_set_compression,
5633         .mkdir = smb2_mkdir,
5634         .mkdir_setinfo = smb2_mkdir_setinfo,
5635         .posix_mkdir = smb311_posix_mkdir,
5636         .rmdir = smb2_rmdir,
5637         .unlink = smb2_unlink,
5638         .rename = smb2_rename_path,
5639         .create_hardlink = smb2_create_hardlink,
5640         .query_symlink = smb2_query_symlink,
5641         .query_mf_symlink = smb3_query_mf_symlink,
5642         .create_mf_symlink = smb3_create_mf_symlink,
5643         .open = smb2_open_file,
5644         .set_fid = smb2_set_fid,
5645         .close = smb2_close_file,
5646         .close_getattr = smb2_close_getattr,
5647         .flush = smb2_flush_file,
5648         .async_readv = smb2_async_readv,
5649         .async_writev = smb2_async_writev,
5650         .sync_read = smb2_sync_read,
5651         .sync_write = smb2_sync_write,
5652         .query_dir_first = smb2_query_dir_first,
5653         .query_dir_next = smb2_query_dir_next,
5654         .close_dir = smb2_close_dir,
5655         .calc_smb_size = smb2_calc_size,
5656         .is_status_pending = smb2_is_status_pending,
5657         .is_session_expired = smb2_is_session_expired,
5658         .oplock_response = smb2_oplock_response,
5659         .queryfs = smb311_queryfs,
5660         .mand_lock = smb2_mand_lock,
5661         .mand_unlock_range = smb2_unlock_range,
5662         .push_mand_locks = smb2_push_mandatory_locks,
5663         .get_lease_key = smb2_get_lease_key,
5664         .set_lease_key = smb2_set_lease_key,
5665         .new_lease_key = smb2_new_lease_key,
5666         .generate_signingkey = generate_smb311signingkey,
5667         .calc_signature = smb3_calc_signature,
5668         .set_integrity  = smb3_set_integrity,
5669         .is_read_op = smb21_is_read_op,
5670         .set_oplock_level = smb3_set_oplock_level,
5671         .create_lease_buf = smb3_create_lease_buf,
5672         .parse_lease_buf = smb3_parse_lease_buf,
5673         .copychunk_range = smb2_copychunk_range,
5674         .duplicate_extents = smb2_duplicate_extents,
5675 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5676         .wp_retry_size = smb2_wp_retry_size,
5677         .dir_needs_close = smb2_dir_needs_close,
5678         .fallocate = smb3_fallocate,
5679         .enum_snapshots = smb3_enum_snapshots,
5680         .notify = smb3_notify,
5681         .init_transform_rq = smb3_init_transform_rq,
5682         .is_transform_hdr = smb3_is_transform_hdr,
5683         .receive_transform = smb3_receive_transform,
5684         .get_dfs_refer = smb2_get_dfs_refer,
5685         .select_sectype = smb2_select_sectype,
5686 #ifdef CONFIG_CIFS_XATTR
5687         .query_all_EAs = smb2_query_eas,
5688         .set_EA = smb2_set_ea,
5689 #endif /* CIFS_XATTR */
5690         .get_acl = get_smb2_acl,
5691         .get_acl_by_fid = get_smb2_acl_by_fid,
5692         .set_acl = set_smb2_acl,
5693         .next_header = smb2_next_header,
5694         .ioctl_query_info = smb2_ioctl_query_info,
5695         .make_node = smb2_make_node,
5696         .fiemap = smb3_fiemap,
5697         .llseek = smb3_llseek,
5698         .is_status_io_timeout = smb2_is_status_io_timeout,
5699         .is_network_name_deleted = smb2_is_network_name_deleted,
5700 };
5701
5702 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5703 struct smb_version_values smb20_values = {
5704         .version_string = SMB20_VERSION_STRING,
5705         .protocol_id = SMB20_PROT_ID,
5706         .req_capabilities = 0, /* MBZ */
5707         .large_lock_type = 0,
5708         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5709         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5710         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5711         .header_size = sizeof(struct smb2_hdr),
5712         .header_preamble_size = 0,
5713         .max_header_size = MAX_SMB2_HDR_SIZE,
5714         .read_rsp_size = sizeof(struct smb2_read_rsp),
5715         .lock_cmd = SMB2_LOCK,
5716         .cap_unix = 0,
5717         .cap_nt_find = SMB2_NT_FIND,
5718         .cap_large_files = SMB2_LARGE_FILES,
5719         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5720         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5721         .create_lease_size = sizeof(struct create_lease),
5722 };
5723 #endif /* ALLOW_INSECURE_LEGACY */
5724
5725 struct smb_version_values smb21_values = {
5726         .version_string = SMB21_VERSION_STRING,
5727         .protocol_id = SMB21_PROT_ID,
5728         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5729         .large_lock_type = 0,
5730         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5731         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5732         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5733         .header_size = sizeof(struct smb2_hdr),
5734         .header_preamble_size = 0,
5735         .max_header_size = MAX_SMB2_HDR_SIZE,
5736         .read_rsp_size = sizeof(struct smb2_read_rsp),
5737         .lock_cmd = SMB2_LOCK,
5738         .cap_unix = 0,
5739         .cap_nt_find = SMB2_NT_FIND,
5740         .cap_large_files = SMB2_LARGE_FILES,
5741         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5742         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5743         .create_lease_size = sizeof(struct create_lease),
5744 };
5745
5746 struct smb_version_values smb3any_values = {
5747         .version_string = SMB3ANY_VERSION_STRING,
5748         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5749         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5750         .large_lock_type = 0,
5751         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5752         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5753         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5754         .header_size = sizeof(struct smb2_hdr),
5755         .header_preamble_size = 0,
5756         .max_header_size = MAX_SMB2_HDR_SIZE,
5757         .read_rsp_size = sizeof(struct smb2_read_rsp),
5758         .lock_cmd = SMB2_LOCK,
5759         .cap_unix = 0,
5760         .cap_nt_find = SMB2_NT_FIND,
5761         .cap_large_files = SMB2_LARGE_FILES,
5762         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5763         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5764         .create_lease_size = sizeof(struct create_lease_v2),
5765 };
5766
5767 struct smb_version_values smbdefault_values = {
5768         .version_string = SMBDEFAULT_VERSION_STRING,
5769         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5770         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5771         .large_lock_type = 0,
5772         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5773         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5774         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5775         .header_size = sizeof(struct smb2_hdr),
5776         .header_preamble_size = 0,
5777         .max_header_size = MAX_SMB2_HDR_SIZE,
5778         .read_rsp_size = sizeof(struct smb2_read_rsp),
5779         .lock_cmd = SMB2_LOCK,
5780         .cap_unix = 0,
5781         .cap_nt_find = SMB2_NT_FIND,
5782         .cap_large_files = SMB2_LARGE_FILES,
5783         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5784         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5785         .create_lease_size = sizeof(struct create_lease_v2),
5786 };
5787
5788 struct smb_version_values smb30_values = {
5789         .version_string = SMB30_VERSION_STRING,
5790         .protocol_id = SMB30_PROT_ID,
5791         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5792         .large_lock_type = 0,
5793         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5794         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5795         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5796         .header_size = sizeof(struct smb2_hdr),
5797         .header_preamble_size = 0,
5798         .max_header_size = MAX_SMB2_HDR_SIZE,
5799         .read_rsp_size = sizeof(struct smb2_read_rsp),
5800         .lock_cmd = SMB2_LOCK,
5801         .cap_unix = 0,
5802         .cap_nt_find = SMB2_NT_FIND,
5803         .cap_large_files = SMB2_LARGE_FILES,
5804         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5805         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5806         .create_lease_size = sizeof(struct create_lease_v2),
5807 };
5808
5809 struct smb_version_values smb302_values = {
5810         .version_string = SMB302_VERSION_STRING,
5811         .protocol_id = SMB302_PROT_ID,
5812         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5813         .large_lock_type = 0,
5814         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5815         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5816         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5817         .header_size = sizeof(struct smb2_hdr),
5818         .header_preamble_size = 0,
5819         .max_header_size = MAX_SMB2_HDR_SIZE,
5820         .read_rsp_size = sizeof(struct smb2_read_rsp),
5821         .lock_cmd = SMB2_LOCK,
5822         .cap_unix = 0,
5823         .cap_nt_find = SMB2_NT_FIND,
5824         .cap_large_files = SMB2_LARGE_FILES,
5825         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5826         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5827         .create_lease_size = sizeof(struct create_lease_v2),
5828 };
5829
5830 struct smb_version_values smb311_values = {
5831         .version_string = SMB311_VERSION_STRING,
5832         .protocol_id = SMB311_PROT_ID,
5833         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5834         .large_lock_type = 0,
5835         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5836         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5837         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5838         .header_size = sizeof(struct smb2_hdr),
5839         .header_preamble_size = 0,
5840         .max_header_size = MAX_SMB2_HDR_SIZE,
5841         .read_rsp_size = sizeof(struct smb2_read_rsp),
5842         .lock_cmd = SMB2_LOCK,
5843         .cap_unix = 0,
5844         .cap_nt_find = SMB2_NT_FIND,
5845         .cap_large_files = SMB2_LARGE_FILES,
5846         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5847         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5848         .create_lease_size = sizeof(struct create_lease_v2),
5849 };