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 "cifsfs.h"
  16 #include "cifsglob.h"
  17 #include "smb2pdu.h"
  18 #include "smb2proto.h"
  19 #include "cifsproto.h"
  20 #include "cifs_debug.h"
  21 #include "cifs_unicode.h"
  22 #include "smb2status.h"
  23 #include "smb2glob.h"
  24 #include "cifs_ioctl.h"
  25 #include "smbdirect.h"
  26
  27 /* Change credits for different ops and return the total number of credits */
  28 static int
  29 change_conf(struct TCP_Server_Info *server)
  30 {
  31         server->credits += server->echo_credits + server->oplock_credits;
  32         server->oplock_credits = server->echo_credits = 0;
  33         switch (server->credits) {
  34         case 0:
  35                 return 0;
  36         case 1:
  37                 server->echoes = false;
  38                 server->oplocks = false;
  39                 break;
  40         case 2:
  41                 server->echoes = true;
  42                 server->oplocks = false;
  43                 server->echo_credits = 1;
  44                 break;
  45         default:
  46                 server->echoes = true;
  47                 if (enable_oplocks) {
  48                         server->oplocks = true;
  49                         server->oplock_credits = 1;
  50                 } else
  51                         server->oplocks = false;
  52
  53                 server->echo_credits = 1;
  54         }
  55         server->credits -= server->echo_credits + server->oplock_credits;
  56         return server->credits + server->echo_credits + server->oplock_credits;
  57 }
  58
  59 static void
  60 smb2_add_credits(struct TCP_Server_Info *server,
  61                  const struct cifs_credits *credits, const int optype)
  62 {
  63         int *val, rc = -1;
  64         unsigned int add = credits->value;
  65         unsigned int instance = credits->instance;
  66         bool reconnect_detected = false;
  67
  68         spin_lock(&server->req_lock);
  69         val = server->ops->get_credits_field(server, optype);
  70
  71         /* eg found case where write overlapping reconnect messed up credits */
  72         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  73                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
  74                         server->hostname, *val);
  75         if ((instance == 0) || (instance == server->reconnect_instance))
  76                 *val += add;
  77         else
  78                 reconnect_detected = true;
  79
  80         if (*val > 65000) {
  81                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  82                 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  83         }
  84         server->in_flight--;
  85         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  86                 rc = change_conf(server);
  87         /*
  88          * Sometimes server returns 0 credits on oplock break ack - we need to
  89          * rebalance credits in this case.
  90          */
  91         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  92                  server->oplocks) {
  93                 if (server->credits > 1) {
  94                         server->credits--;
  95                         server->oplock_credits++;
  96                 }
  97         }
  98         spin_unlock(&server->req_lock);
  99         wake_up(&server->request_q);
 100
 101         if (reconnect_detected)
 102                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 103                          add, instance);
 104
 105         if (server->tcpStatus == CifsNeedReconnect
 106             || server->tcpStatus == CifsExiting)
 107                 return;
 108
 109         switch (rc) {
 110         case -1:
 111                 /* change_conf hasn't been executed */
 112                 break;
 113         case 0:
 114                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 115                 break;
 116         case 1:
 117                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 118                 break;
 119         case 2:
 120                 cifs_dbg(FYI, "disabling oplocks\n");
 121                 break;
 122         default:
 123                 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
 124         }
 125 }
 126
 127 static void
 128 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 129 {
 130         spin_lock(&server->req_lock);
 131         server->credits = val;
 132         if (val == 1)
 133                 server->reconnect_instance++;
 134         spin_unlock(&server->req_lock);
 135         /* don't log while holding the lock */
 136         if (val == 1)
 137                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 138 }
 139
 140 static int *
 141 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 142 {
 143         switch (optype) {
 144         case CIFS_ECHO_OP:
 145                 return &server->echo_credits;
 146         case CIFS_OBREAK_OP:
 147                 return &server->oplock_credits;
 148         default:
 149                 return &server->credits;
 150         }
 151 }
 152
 153 static unsigned int
 154 smb2_get_credits(struct mid_q_entry *mid)
 155 {
 156         return mid->credits_received;
 157 }
 158
 159 static int
 160 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 161                       unsigned int *num, struct cifs_credits *credits)
 162 {
 163         int rc = 0;
 164         unsigned int scredits;
 165
 166         spin_lock(&server->req_lock);
 167         while (1) {
 168                 if (server->credits <= 0) {
 169                         spin_unlock(&server->req_lock);
 170                         cifs_num_waiters_inc(server);
 171                         rc = wait_event_killable(server->request_q,
 172                                 has_credits(server, &server->credits, 1));
 173                         cifs_num_waiters_dec(server);
 174                         if (rc)
 175                                 return rc;
 176                         spin_lock(&server->req_lock);
 177                 } else {
 178                         if (server->tcpStatus == CifsExiting) {
 179                                 spin_unlock(&server->req_lock);
 180                                 return -ENOENT;
 181                         }
 182
 183                         scredits = server->credits;
 184                         /* can deadlock with reopen */
 185                         if (scredits <= 8) {
 186                                 *num = SMB2_MAX_BUFFER_SIZE;
 187                                 credits->value = 0;
 188                                 credits->instance = 0;
 189                                 break;
 190                         }
 191
 192                         /* leave some credits for reopen and other ops */
 193                         scredits -= 8;
 194                         *num = min_t(unsigned int, size,
 195                                      scredits * SMB2_MAX_BUFFER_SIZE);
 196
 197                         credits->value =
 198                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 199                         credits->instance = server->reconnect_instance;
 200                         server->credits -= credits->value;
 201                         server->in_flight++;
 202                         if (server->in_flight > server->max_in_flight)
 203                                 server->max_in_flight = server->in_flight;
 204                         break;
 205                 }
 206         }
 207         spin_unlock(&server->req_lock);
 208         return rc;
 209 }
 210
 211 static int
 212 smb2_adjust_credits(struct TCP_Server_Info *server,
 213                     struct cifs_credits *credits,
 214                     const unsigned int payload_size)
 215 {
 216         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 217
 218         if (!credits->value || credits->value == new_val)
 219                 return 0;
 220
 221         if (credits->value < new_val) {
 222                 WARN_ONCE(1, "request has less credits (%d) than required (%d)",
 223                           credits->value, new_val);
 224                 return -ENOTSUPP;
 225         }
 226
 227         spin_lock(&server->req_lock);
 228
 229         if (server->reconnect_instance != credits->instance) {
 230                 spin_unlock(&server->req_lock);
 231                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 232                          credits->value - new_val);
 233                 return -EAGAIN;
 234         }
 235
 236         server->credits += credits->value - new_val;
 237         spin_unlock(&server->req_lock);
 238         wake_up(&server->request_q);
 239         credits->value = new_val;
 240         return 0;
 241 }
 242
 243 static __u64
 244 smb2_get_next_mid(struct TCP_Server_Info *server)
 245 {
 246         __u64 mid;
 247         /* for SMB2 we need the current value */
 248         spin_lock(&GlobalMid_Lock);
 249         mid = server->CurrentMid++;
 250         spin_unlock(&GlobalMid_Lock);
 251         return mid;
 252 }
 253
 254 static void
 255 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 256 {
 257         spin_lock(&GlobalMid_Lock);
 258         if (server->CurrentMid >= val)
 259                 server->CurrentMid -= val;
 260         spin_unlock(&GlobalMid_Lock);
 261 }
 262
 263 static struct mid_q_entry *
 264 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 265 {
 266         struct mid_q_entry *mid;
 267         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 268         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 269
 270         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 271                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 272                 return NULL;
 273         }
 274
 275         spin_lock(&GlobalMid_Lock);
 276         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 277                 if ((mid->mid == wire_mid) &&
 278                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 279                     (mid->command == shdr->Command)) {
 280                         kref_get(&mid->refcount);
 281                         spin_unlock(&GlobalMid_Lock);
 282                         return mid;
 283                 }
 284         }
 285         spin_unlock(&GlobalMid_Lock);
 286         return NULL;
 287 }
 288
 289 static void
 290 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 291 {
 292 #ifdef CONFIG_CIFS_DEBUG2
 293         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 294
 295         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 296                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 297                  shdr->ProcessId);
 298         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 299                  server->ops->calc_smb_size(buf, server));
 300 #endif
 301 }
 302
 303 static bool
 304 smb2_need_neg(struct TCP_Server_Info *server)
 305 {
 306         return server->max_read == 0;
 307 }
 308
 309 static int
 310 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 311 {
 312         int rc;
 313
 314         cifs_ses_server(ses)->CurrentMid = 0;
 315         rc = SMB2_negotiate(xid, ses);
 316         /* BB we probably don't need to retry with modern servers */
 317         if (rc == -EAGAIN)
 318                 rc = -EHOSTDOWN;
 319         return rc;
 320 }
 321
 322 static unsigned int
 323 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 324 {
 325         struct TCP_Server_Info *server = tcon->ses->server;
 326         unsigned int wsize;
 327
 328         /* start with specified wsize, or default */
 329         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 330         wsize = min_t(unsigned int, wsize, server->max_write);
 331 #ifdef CONFIG_CIFS_SMB_DIRECT
 332         if (server->rdma) {
 333                 if (server->sign)
 334                         wsize = min_t(unsigned int,
 335                                 wsize, server->smbd_conn->max_fragmented_send_size);
 336                 else
 337                         wsize = min_t(unsigned int,
 338                                 wsize, server->smbd_conn->max_readwrite_size);
 339         }
 340 #endif
 341         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 342                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 343
 344         return wsize;
 345 }
 346
 347 static unsigned int
 348 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 349 {
 350         struct TCP_Server_Info *server = tcon->ses->server;
 351         unsigned int wsize;
 352
 353         /* start with specified wsize, or default */
 354         wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
 355         wsize = min_t(unsigned int, wsize, server->max_write);
 356 #ifdef CONFIG_CIFS_SMB_DIRECT
 357         if (server->rdma) {
 358                 if (server->sign)
 359                         wsize = min_t(unsigned int,
 360                                 wsize, server->smbd_conn->max_fragmented_send_size);
 361                 else
 362                         wsize = min_t(unsigned int,
 363                                 wsize, server->smbd_conn->max_readwrite_size);
 364         }
 365 #endif
 366         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 367                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 368
 369         return wsize;
 370 }
 371
 372 static unsigned int
 373 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 374 {
 375         struct TCP_Server_Info *server = tcon->ses->server;
 376         unsigned int rsize;
 377
 378         /* start with specified rsize, or default */
 379         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 380         rsize = min_t(unsigned int, rsize, server->max_read);
 381 #ifdef CONFIG_CIFS_SMB_DIRECT
 382         if (server->rdma) {
 383                 if (server->sign)
 384                         rsize = min_t(unsigned int,
 385                                 rsize, server->smbd_conn->max_fragmented_recv_size);
 386                 else
 387                         rsize = min_t(unsigned int,
 388                                 rsize, server->smbd_conn->max_readwrite_size);
 389         }
 390 #endif
 391
 392         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 393                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 394
 395         return rsize;
 396 }
 397
 398 static unsigned int
 399 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 400 {
 401         struct TCP_Server_Info *server = tcon->ses->server;
 402         unsigned int rsize;
 403
 404         /* start with specified rsize, or default */
 405         rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
 406         rsize = min_t(unsigned int, rsize, server->max_read);
 407 #ifdef CONFIG_CIFS_SMB_DIRECT
 408         if (server->rdma) {
 409                 if (server->sign)
 410                         rsize = min_t(unsigned int,
 411                                 rsize, server->smbd_conn->max_fragmented_recv_size);
 412                 else
 413                         rsize = min_t(unsigned int,
 414                                 rsize, server->smbd_conn->max_readwrite_size);
 415         }
 416 #endif
 417
 418         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 419                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 420
 421         return rsize;
 422 }
 423
 424 static int
 425 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 426                         size_t buf_len,
 427                         struct cifs_server_iface **iface_list,
 428                         size_t *iface_count)
 429 {
 430         struct network_interface_info_ioctl_rsp *p;
 431         struct sockaddr_in *addr4;
 432         struct sockaddr_in6 *addr6;
 433         struct iface_info_ipv4 *p4;
 434         struct iface_info_ipv6 *p6;
 435         struct cifs_server_iface *info;
 436         ssize_t bytes_left;
 437         size_t next = 0;
 438         int nb_iface = 0;
 439         int rc = 0;
 440
 441         *iface_list = NULL;
 442         *iface_count = 0;
 443
 444         /*
 445          * Fist pass: count and sanity check
 446          */
 447
 448         bytes_left = buf_len;
 449         p = buf;
 450         while (bytes_left >= sizeof(*p)) {
 451                 nb_iface++;
 452                 next = le32_to_cpu(p->Next);
 453                 if (!next) {
 454                         bytes_left -= sizeof(*p);
 455                         break;
 456                 }
 457                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 458                 bytes_left -= next;
 459         }
 460
 461         if (!nb_iface) {
 462                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 463                 rc = -EINVAL;
 464                 goto out;
 465         }
 466
 467         if (bytes_left || p->Next)
 468                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 469
 470
 471         /*
 472          * Second pass: extract info to internal structure
 473          */
 474
 475         *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
 476         if (!*iface_list) {
 477                 rc = -ENOMEM;
 478                 goto out;
 479         }
 480
 481         info = *iface_list;
 482         bytes_left = buf_len;
 483         p = buf;
 484         while (bytes_left >= sizeof(*p)) {
 485                 info->speed = le64_to_cpu(p->LinkSpeed);
 486                 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
 487                 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
 488
 489                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 490                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 491                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 492                          le32_to_cpu(p->Capability));
 493
 494                 switch (p->Family) {
 495                 /*
 496                  * The kernel and wire socket structures have the same
 497                  * layout and use network byte order but make the
 498                  * conversion explicit in case either one changes.
 499                  */
 500                 case INTERNETWORK:
 501                         addr4 = (struct sockaddr_in *)&info->sockaddr;
 502                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 503                         addr4->sin_family = AF_INET;
 504                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 505
 506                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 507                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 508
 509                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 510                                  &addr4->sin_addr);
 511                         break;
 512                 case INTERNETWORKV6:
 513                         addr6 = (struct sockaddr_in6 *)&info->sockaddr;
 514                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 515                         addr6->sin6_family = AF_INET6;
 516                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 517
 518                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 519                         addr6->sin6_flowinfo = 0;
 520                         addr6->sin6_scope_id = 0;
 521                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 522
 523                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 524                                  &addr6->sin6_addr);
 525                         break;
 526                 default:
 527                         cifs_dbg(VFS,
 528                                  "%s: skipping unsupported socket family\n",
 529                                  __func__);
 530                         goto next_iface;
 531                 }
 532
 533                 (*iface_count)++;
 534                 info++;
 535 next_iface:
 536                 next = le32_to_cpu(p->Next);
 537                 if (!next)
 538                         break;
 539                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 540                 bytes_left -= next;
 541         }
 542
 543         if (!*iface_count) {
 544                 rc = -EINVAL;
 545                 goto out;
 546         }
 547
 548 out:
 549         if (rc) {
 550                 kfree(*iface_list);
 551                 *iface_count = 0;
 552                 *iface_list = NULL;
 553         }
 554         return rc;
 555 }
 556
 557 static int compare_iface(const void *ia, const void *ib)
 558 {
 559         const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
 560         const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
 561
 562         return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
 563 }
 564
 565 static int
 566 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 567 {
 568         int rc;
 569         unsigned int ret_data_len = 0;
 570         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 571         struct cifs_server_iface *iface_list;
 572         size_t iface_count;
 573         struct cifs_ses *ses = tcon->ses;
 574
 575         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 576                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 577                         NULL /* no data input */, 0 /* no data input */,
 578                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 579         if (rc == -EOPNOTSUPP) {
 580                 cifs_dbg(FYI,
 581                          "server does not support query network interfaces\n");
 582                 goto out;
 583         } else if (rc != 0) {
 584                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 585                 goto out;
 586         }
 587
 588         rc = parse_server_interfaces(out_buf, ret_data_len,
 589                                      &iface_list, &iface_count);
 590         if (rc)
 591                 goto out;
 592
 593         /* sort interfaces from fastest to slowest */
 594         sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
 595
 596         spin_lock(&ses->iface_lock);
 597         kfree(ses->iface_list);
 598         ses->iface_list = iface_list;
 599         ses->iface_count = iface_count;
 600         ses->iface_last_update = jiffies;
 601         spin_unlock(&ses->iface_lock);
 602
 603 out:
 604         kfree(out_buf);
 605         return rc;
 606 }
 607
 608 static void
 609 smb2_close_cached_fid(struct kref *ref)
 610 {
 611         struct cached_fid *cfid = container_of(ref, struct cached_fid,
 612                                                refcount);
 613
 614         if (cfid->is_valid) {
 615                 cifs_dbg(FYI, "clear cached root file handle\n");
 616                 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 617                            cfid->fid->volatile_fid);
 618                 cfid->is_valid = false;
 619                 cfid->file_all_info_is_valid = false;
 620                 cfid->has_lease = false;
 621         }
 622 }
 623
 624 void close_shroot(struct cached_fid *cfid)
 625 {
 626         mutex_lock(&cfid->fid_mutex);
 627         kref_put(&cfid->refcount, smb2_close_cached_fid);
 628         mutex_unlock(&cfid->fid_mutex);
 629 }
 630
 631 void close_shroot_lease_locked(struct cached_fid *cfid)
 632 {
 633         if (cfid->has_lease) {
 634                 cfid->has_lease = false;
 635                 kref_put(&cfid->refcount, smb2_close_cached_fid);
 636         }
 637 }
 638
 639 void close_shroot_lease(struct cached_fid *cfid)
 640 {
 641         mutex_lock(&cfid->fid_mutex);
 642         close_shroot_lease_locked(cfid);
 643         mutex_unlock(&cfid->fid_mutex);
 644 }
 645
 646 void
 647 smb2_cached_lease_break(struct work_struct *work)
 648 {
 649         struct cached_fid *cfid = container_of(work,
 650                                 struct cached_fid, lease_break);
 651
 652         close_shroot_lease(cfid);
 653 }
 654
 655 /*
 656  * Open the directory at the root of a share
 657  */
 658 int open_shroot(unsigned int xid, struct cifs_tcon *tcon,
 659                 struct cifs_sb_info *cifs_sb, struct cifs_fid *pfid)
 660 {
 661         struct cifs_ses *ses = tcon->ses;
 662         struct TCP_Server_Info *server = ses->server;
 663         struct cifs_open_parms oparms;
 664         struct smb2_create_rsp *o_rsp = NULL;
 665         struct smb2_query_info_rsp *qi_rsp = NULL;
 666         int resp_buftype[2];
 667         struct smb_rqst rqst[2];
 668         struct kvec rsp_iov[2];
 669         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
 670         struct kvec qi_iov[1];
 671         int rc, flags = 0;
 672         __le16 utf16_path = 0; /* Null - since an open of top of share */
 673         u8 oplock = SMB2_OPLOCK_LEVEL_II;
 674
 675         mutex_lock(&tcon->crfid.fid_mutex);
 676         if (tcon->crfid.is_valid) {
 677                 cifs_dbg(FYI, "found a cached root file handle\n");
 678                 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
 679                 kref_get(&tcon->crfid.refcount);
 680                 mutex_unlock(&tcon->crfid.fid_mutex);
 681                 return 0;
 682         }
 683
 684         /*
 685          * We do not hold the lock for the open because in case
 686          * SMB2_open needs to reconnect, it will end up calling
 687          * cifs_mark_open_files_invalid() which takes the lock again
 688          * thus causing a deadlock
 689          */
 690
 691         mutex_unlock(&tcon->crfid.fid_mutex);
 692
 693         if (smb3_encryption_required(tcon))
 694                 flags |= CIFS_TRANSFORM_REQ;
 695
 696         memset(rqst, 0, sizeof(rqst));
 697         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
 698         memset(rsp_iov, 0, sizeof(rsp_iov));
 699
 700         /* Open */
 701         memset(&open_iov, 0, sizeof(open_iov));
 702         rqst[0].rq_iov = open_iov;
 703         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
 704
 705         oparms.tcon = tcon;
 706         oparms.create_options = cifs_create_options(cifs_sb, 0);
 707         oparms.desired_access = FILE_READ_ATTRIBUTES;
 708         oparms.disposition = FILE_OPEN;
 709         oparms.fid = pfid;
 710         oparms.reconnect = false;
 711
 712         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &utf16_path);
 713         if (rc)
 714                 goto oshr_free;
 715         smb2_set_next_command(tcon, &rqst[0]);
 716
 717         memset(&qi_iov, 0, sizeof(qi_iov));
 718         rqst[1].rq_iov = qi_iov;
 719         rqst[1].rq_nvec = 1;
 720
 721         rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
 722                                   COMPOUND_FID, FILE_ALL_INFORMATION,
 723                                   SMB2_O_INFO_FILE, 0,
 724                                   sizeof(struct smb2_file_all_info) +
 725                                   PATH_MAX * 2, 0, NULL);
 726         if (rc)
 727                 goto oshr_free;
 728
 729         smb2_set_related(&rqst[1]);
 730
 731         rc = compound_send_recv(xid, ses, flags, 2, rqst,
 732                                 resp_buftype, rsp_iov);
 733         mutex_lock(&tcon->crfid.fid_mutex);
 734
 735         /*
 736          * Now we need to check again as the cached root might have
 737          * been successfully re-opened from a concurrent process
 738          */
 739
 740         if (tcon->crfid.is_valid) {
 741                 /* work was already done */
 742
 743                 /* stash fids for close() later */
 744                 struct cifs_fid fid = {
 745                         .persistent_fid = pfid->persistent_fid,
 746                         .volatile_fid = pfid->volatile_fid,
 747                 };
 748
 749                 /*
 750                  * caller expects this func to set pfid to a valid
 751                  * cached root, so we copy the existing one and get a
 752                  * reference.
 753                  */
 754                 memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
 755                 kref_get(&tcon->crfid.refcount);
 756
 757                 mutex_unlock(&tcon->crfid.fid_mutex);
 758
 759                 if (rc == 0) {
 760                         /* close extra handle outside of crit sec */
 761                         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 762                 }
 763                 goto oshr_free;
 764         }
 765
 766         /* Cached root is still invalid, continue normaly */
 767
 768         if (rc) {
 769                 if (rc == -EREMCHG) {
 770                         tcon->need_reconnect = true;
 771                         printk_once(KERN_WARNING "server share %s deleted\n",
 772                                     tcon->treeName);
 773                 }
 774                 goto oshr_exit;
 775         }
 776
 777         atomic_inc(&tcon->num_remote_opens);
 778
 779         o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
 780         oparms.fid->persistent_fid = o_rsp->PersistentFileId;
 781         oparms.fid->volatile_fid = o_rsp->VolatileFileId;
 782 #ifdef CONFIG_CIFS_DEBUG2
 783         oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
 784 #endif /* CIFS_DEBUG2 */
 785
 786         memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
 787         tcon->crfid.tcon = tcon;
 788         tcon->crfid.is_valid = true;
 789         kref_init(&tcon->crfid.refcount);
 790
 791         /* BB TBD check to see if oplock level check can be removed below */
 792         if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
 793                 kref_get(&tcon->crfid.refcount);
 794                 tcon->crfid.has_lease = true;
 795                 smb2_parse_contexts(server, o_rsp,
 796                                 &oparms.fid->epoch,
 797                                 oparms.fid->lease_key, &oplock, NULL);
 798         } else
 799                 goto oshr_exit;
 800
 801         qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
 802         if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
 803                 goto oshr_exit;
 804         if (!smb2_validate_and_copy_iov(
 805                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 806                                 sizeof(struct smb2_file_all_info),
 807                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 808                                 (char *)&tcon->crfid.file_all_info))
 809                 tcon->crfid.file_all_info_is_valid = true;
 810
 811 oshr_exit:
 812         mutex_unlock(&tcon->crfid.fid_mutex);
 813 oshr_free:
 814         SMB2_open_free(&rqst[0]);
 815         SMB2_query_info_free(&rqst[1]);
 816         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 817         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 818         return rc;
 819 }
 820
 821 static void
 822 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 823               struct cifs_sb_info *cifs_sb)
 824 {
 825         int rc;
 826         __le16 srch_path = 0; /* Null - open root of share */
 827         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 828         struct cifs_open_parms oparms;
 829         struct cifs_fid fid;
 830         bool no_cached_open = tcon->nohandlecache;
 831
 832         oparms.tcon = tcon;
 833         oparms.desired_access = FILE_READ_ATTRIBUTES;
 834         oparms.disposition = FILE_OPEN;
 835         oparms.create_options = cifs_create_options(cifs_sb, 0);
 836         oparms.fid = &fid;
 837         oparms.reconnect = false;
 838
 839         if (no_cached_open)
 840                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 841                                NULL);
 842         else
 843                 rc = open_shroot(xid, tcon, cifs_sb, &fid);
 844
 845         if (rc)
 846                 return;
 847
 848         SMB3_request_interfaces(xid, tcon);
 849
 850         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 851                         FS_ATTRIBUTE_INFORMATION);
 852         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 853                         FS_DEVICE_INFORMATION);
 854         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 855                         FS_VOLUME_INFORMATION);
 856         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 857                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 858         if (no_cached_open)
 859                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 860         else
 861                 close_shroot(&tcon->crfid);
 862 }
 863
 864 static void
 865 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 866               struct cifs_sb_info *cifs_sb)
 867 {
 868         int rc;
 869         __le16 srch_path = 0; /* Null - open root of share */
 870         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 871         struct cifs_open_parms oparms;
 872         struct cifs_fid fid;
 873
 874         oparms.tcon = tcon;
 875         oparms.desired_access = FILE_READ_ATTRIBUTES;
 876         oparms.disposition = FILE_OPEN;
 877         oparms.create_options = cifs_create_options(cifs_sb, 0);
 878         oparms.fid = &fid;
 879         oparms.reconnect = false;
 880
 881         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
 882         if (rc)
 883                 return;
 884
 885         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 886                         FS_ATTRIBUTE_INFORMATION);
 887         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 888                         FS_DEVICE_INFORMATION);
 889         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 890 }
 891
 892 static int
 893 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 894                         struct cifs_sb_info *cifs_sb, const char *full_path)
 895 {
 896         int rc;
 897         __le16 *utf16_path;
 898         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 899         struct cifs_open_parms oparms;
 900         struct cifs_fid fid;
 901
 902         if ((*full_path == 0) && tcon->crfid.is_valid)
 903                 return 0;
 904
 905         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 906         if (!utf16_path)
 907                 return -ENOMEM;
 908
 909         oparms.tcon = tcon;
 910         oparms.desired_access = FILE_READ_ATTRIBUTES;
 911         oparms.disposition = FILE_OPEN;
 912         oparms.create_options = cifs_create_options(cifs_sb, 0);
 913         oparms.fid = &fid;
 914         oparms.reconnect = false;
 915
 916         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 917         if (rc) {
 918                 kfree(utf16_path);
 919                 return rc;
 920         }
 921
 922         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 923         kfree(utf16_path);
 924         return rc;
 925 }
 926
 927 static int
 928 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 929                   struct cifs_sb_info *cifs_sb, const char *full_path,
 930                   u64 *uniqueid, FILE_ALL_INFO *data)
 931 {
 932         *uniqueid = le64_to_cpu(data->IndexNumber);
 933         return 0;
 934 }
 935
 936 static int
 937 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 938                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 939 {
 940         int rc;
 941         struct smb2_file_all_info *smb2_data;
 942
 943         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 944                             GFP_KERNEL);
 945         if (smb2_data == NULL)
 946                 return -ENOMEM;
 947
 948         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 949                              smb2_data);
 950         if (!rc)
 951                 move_smb2_info_to_cifs(data, smb2_data);
 952         kfree(smb2_data);
 953         return rc;
 954 }
 955
 956 #ifdef CONFIG_CIFS_XATTR
 957 static ssize_t
 958 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 959                      struct smb2_file_full_ea_info *src, size_t src_size,
 960                      const unsigned char *ea_name)
 961 {
 962         int rc = 0;
 963         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 964         char *name, *value;
 965         size_t buf_size = dst_size;
 966         size_t name_len, value_len, user_name_len;
 967
 968         while (src_size > 0) {
 969                 name = &src->ea_data[0];
 970                 name_len = (size_t)src->ea_name_length;
 971                 value = &src->ea_data[src->ea_name_length + 1];
 972                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 973
 974                 if (name_len == 0)
 975                         break;
 976
 977                 if (src_size < 8 + name_len + 1 + value_len) {
 978                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 979                         rc = -EIO;
 980                         goto out;
 981                 }
 982
 983                 if (ea_name) {
 984                         if (ea_name_len == name_len &&
 985                             memcmp(ea_name, name, name_len) == 0) {
 986                                 rc = value_len;
 987                                 if (dst_size == 0)
 988                                         goto out;
 989                                 if (dst_size < value_len) {
 990                                         rc = -ERANGE;
 991                                         goto out;
 992                                 }
 993                                 memcpy(dst, value, value_len);
 994                                 goto out;
 995                         }
 996                 } else {
 997                         /* 'user.' plus a terminating null */
 998                         user_name_len = 5 + 1 + name_len;
 999
1000                         if (buf_size == 0) {
1001                                 /* skip copy - calc size only */
1002                                 rc += user_name_len;
1003                         } else if (dst_size >= user_name_len) {
1004                                 dst_size -= user_name_len;
1005                                 memcpy(dst, "user.", 5);
1006                                 dst += 5;
1007                                 memcpy(dst, src->ea_data, name_len);
1008                                 dst += name_len;
1009                                 *dst = 0;
1010                                 ++dst;
1011                                 rc += user_name_len;
1012                         } else {
1013                                 /* stop before overrun buffer */
1014                                 rc = -ERANGE;
1015                                 break;
1016                         }
1017                 }
1018
1019                 if (!src->next_entry_offset)
1020                         break;
1021
1022                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1023                         /* stop before overrun buffer */
1024                         rc = -ERANGE;
1025                         break;
1026                 }
1027                 src_size -= le32_to_cpu(src->next_entry_offset);
1028                 src = (void *)((char *)src +
1029                                le32_to_cpu(src->next_entry_offset));
1030         }
1031
1032         /* didn't find the named attribute */
1033         if (ea_name)
1034                 rc = -ENODATA;
1035
1036 out:
1037         return (ssize_t)rc;
1038 }
1039
1040 static ssize_t
1041 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1042                const unsigned char *path, const unsigned char *ea_name,
1043                char *ea_data, size_t buf_size,
1044                struct cifs_sb_info *cifs_sb)
1045 {
1046         int rc;
1047         __le16 *utf16_path;
1048         struct kvec rsp_iov = {NULL, 0};
1049         int buftype = CIFS_NO_BUFFER;
1050         struct smb2_query_info_rsp *rsp;
1051         struct smb2_file_full_ea_info *info = NULL;
1052
1053         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1054         if (!utf16_path)
1055                 return -ENOMEM;
1056
1057         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1058                                       FILE_READ_EA,
1059                                       FILE_FULL_EA_INFORMATION,
1060                                       SMB2_O_INFO_FILE,
1061                                       CIFSMaxBufSize -
1062                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1063                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1064                                       &rsp_iov, &buftype, cifs_sb);
1065         if (rc) {
1066                 /*
1067                  * If ea_name is NULL (listxattr) and there are no EAs,
1068                  * return 0 as it's not an error. Otherwise, the specified
1069                  * ea_name was not found.
1070                  */
1071                 if (!ea_name && rc == -ENODATA)
1072                         rc = 0;
1073                 goto qeas_exit;
1074         }
1075
1076         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1077         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1078                                le32_to_cpu(rsp->OutputBufferLength),
1079                                &rsp_iov,
1080                                sizeof(struct smb2_file_full_ea_info));
1081         if (rc)
1082                 goto qeas_exit;
1083
1084         info = (struct smb2_file_full_ea_info *)(
1085                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1086         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1087                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1088
1089  qeas_exit:
1090         kfree(utf16_path);
1091         free_rsp_buf(buftype, rsp_iov.iov_base);
1092         return rc;
1093 }
1094
1095
1096 static int
1097 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1098             const char *path, const char *ea_name, const void *ea_value,
1099             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1100             struct cifs_sb_info *cifs_sb)
1101 {
1102         struct cifs_ses *ses = tcon->ses;
1103         __le16 *utf16_path = NULL;
1104         int ea_name_len = strlen(ea_name);
1105         int flags = 0;
1106         int len;
1107         struct smb_rqst rqst[3];
1108         int resp_buftype[3];
1109         struct kvec rsp_iov[3];
1110         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1111         struct cifs_open_parms oparms;
1112         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1113         struct cifs_fid fid;
1114         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1115         unsigned int size[1];
1116         void *data[1];
1117         struct smb2_file_full_ea_info *ea = NULL;
1118         struct kvec close_iov[1];
1119         struct smb2_query_info_rsp *rsp;
1120         int rc, used_len = 0;
1121
1122         if (smb3_encryption_required(tcon))
1123                 flags |= CIFS_TRANSFORM_REQ;
1124
1125         if (ea_name_len > 255)
1126                 return -EINVAL;
1127
1128         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1129         if (!utf16_path)
1130                 return -ENOMEM;
1131
1132         memset(rqst, 0, sizeof(rqst));
1133         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1134         memset(rsp_iov, 0, sizeof(rsp_iov));
1135
1136         if (ses->server->ops->query_all_EAs) {
1137                 if (!ea_value) {
1138                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1139                                                              ea_name, NULL, 0,
1140                                                              cifs_sb);
1141                         if (rc == -ENODATA)
1142                                 goto sea_exit;
1143                 } else {
1144                         /* If we are adding a attribute we should first check
1145                          * if there will be enough space available to store
1146                          * the new EA. If not we should not add it since we
1147                          * would not be able to even read the EAs back.
1148                          */
1149                         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1150                                       FILE_READ_EA,
1151                                       FILE_FULL_EA_INFORMATION,
1152                                       SMB2_O_INFO_FILE,
1153                                       CIFSMaxBufSize -
1154                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1155                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1156                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1157                         if (rc == 0) {
1158                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1159                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1160                         }
1161                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1162                         resp_buftype[1] = CIFS_NO_BUFFER;
1163                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1164                         rc = 0;
1165
1166                         /* Use a fudge factor of 256 bytes in case we collide
1167                          * with a different set_EAs command.
1168                          */
1169                         if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1170                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1171                            used_len + ea_name_len + ea_value_len + 1) {
1172                                 rc = -ENOSPC;
1173                                 goto sea_exit;
1174                         }
1175                 }
1176         }
1177
1178         /* Open */
1179         memset(&open_iov, 0, sizeof(open_iov));
1180         rqst[0].rq_iov = open_iov;
1181         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1182
1183         memset(&oparms, 0, sizeof(oparms));
1184         oparms.tcon = tcon;
1185         oparms.desired_access = FILE_WRITE_EA;
1186         oparms.disposition = FILE_OPEN;
1187         oparms.create_options = cifs_create_options(cifs_sb, 0);
1188         oparms.fid = &fid;
1189         oparms.reconnect = false;
1190
1191         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
1192         if (rc)
1193                 goto sea_exit;
1194         smb2_set_next_command(tcon, &rqst[0]);
1195
1196
1197         /* Set Info */
1198         memset(&si_iov, 0, sizeof(si_iov));
1199         rqst[1].rq_iov = si_iov;
1200         rqst[1].rq_nvec = 1;
1201
1202         len = sizeof(ea) + ea_name_len + ea_value_len + 1;
1203         ea = kzalloc(len, GFP_KERNEL);
1204         if (ea == NULL) {
1205                 rc = -ENOMEM;
1206                 goto sea_exit;
1207         }
1208
1209         ea->ea_name_length = ea_name_len;
1210         ea->ea_value_length = cpu_to_le16(ea_value_len);
1211         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1212         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1213
1214         size[0] = len;
1215         data[0] = ea;
1216
1217         rc = SMB2_set_info_init(tcon, &rqst[1], COMPOUND_FID,
1218                                 COMPOUND_FID, current->tgid,
1219                                 FILE_FULL_EA_INFORMATION,
1220                                 SMB2_O_INFO_FILE, 0, data, size);
1221         smb2_set_next_command(tcon, &rqst[1]);
1222         smb2_set_related(&rqst[1]);
1223
1224
1225         /* Close */
1226         memset(&close_iov, 0, sizeof(close_iov));
1227         rqst[2].rq_iov = close_iov;
1228         rqst[2].rq_nvec = 1;
1229         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1230         smb2_set_related(&rqst[2]);
1231
1232         rc = compound_send_recv(xid, ses, flags, 3, rqst,
1233                                 resp_buftype, rsp_iov);
1234         /* no need to bump num_remote_opens because handle immediately closed */
1235
1236  sea_exit:
1237         kfree(ea);
1238         kfree(utf16_path);
1239         SMB2_open_free(&rqst[0]);
1240         SMB2_set_info_free(&rqst[1]);
1241         SMB2_close_free(&rqst[2]);
1242         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1243         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1244         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1245         return rc;
1246 }
1247 #endif
1248
1249 static bool
1250 smb2_can_echo(struct TCP_Server_Info *server)
1251 {
1252         return server->echoes;
1253 }
1254
1255 static void
1256 smb2_clear_stats(struct cifs_tcon *tcon)
1257 {
1258         int i;
1259
1260         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1261                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1262                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1263         }
1264 }
1265
1266 static void
1267 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1268 {
1269         seq_puts(m, "\n\tShare Capabilities:");
1270         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1271                 seq_puts(m, " DFS,");
1272         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1273                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1274         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1275                 seq_puts(m, " SCALEOUT,");
1276         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1277                 seq_puts(m, " CLUSTER,");
1278         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1279                 seq_puts(m, " ASYMMETRIC,");
1280         if (tcon->capabilities == 0)
1281                 seq_puts(m, " None");
1282         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1283                 seq_puts(m, " Aligned,");
1284         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1285                 seq_puts(m, " Partition Aligned,");
1286         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1287                 seq_puts(m, " SSD,");
1288         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1289                 seq_puts(m, " TRIM-support,");
1290
1291         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1292         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1293         if (tcon->perf_sector_size)
1294                 seq_printf(m, "\tOptimal sector size: 0x%x",
1295                            tcon->perf_sector_size);
1296         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1297 }
1298
1299 static void
1300 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1301 {
1302         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1303         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1304
1305         /*
1306          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1307          *  totals (requests sent) since those SMBs are per-session not per tcon
1308          */
1309         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1310                    (long long)(tcon->bytes_read),
1311                    (long long)(tcon->bytes_written));
1312         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1313                    atomic_read(&tcon->num_local_opens),
1314                    atomic_read(&tcon->num_remote_opens));
1315         seq_printf(m, "\nTreeConnects: %d total %d failed",
1316                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1317                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1318         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1319                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1320                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1321         seq_printf(m, "\nCreates: %d total %d failed",
1322                    atomic_read(&sent[SMB2_CREATE_HE]),
1323                    atomic_read(&failed[SMB2_CREATE_HE]));
1324         seq_printf(m, "\nCloses: %d total %d failed",
1325                    atomic_read(&sent[SMB2_CLOSE_HE]),
1326                    atomic_read(&failed[SMB2_CLOSE_HE]));
1327         seq_printf(m, "\nFlushes: %d total %d failed",
1328                    atomic_read(&sent[SMB2_FLUSH_HE]),
1329                    atomic_read(&failed[SMB2_FLUSH_HE]));
1330         seq_printf(m, "\nReads: %d total %d failed",
1331                    atomic_read(&sent[SMB2_READ_HE]),
1332                    atomic_read(&failed[SMB2_READ_HE]));
1333         seq_printf(m, "\nWrites: %d total %d failed",
1334                    atomic_read(&sent[SMB2_WRITE_HE]),
1335                    atomic_read(&failed[SMB2_WRITE_HE]));
1336         seq_printf(m, "\nLocks: %d total %d failed",
1337                    atomic_read(&sent[SMB2_LOCK_HE]),
1338                    atomic_read(&failed[SMB2_LOCK_HE]));
1339         seq_printf(m, "\nIOCTLs: %d total %d failed",
1340                    atomic_read(&sent[SMB2_IOCTL_HE]),
1341                    atomic_read(&failed[SMB2_IOCTL_HE]));
1342         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1343                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1344                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1345         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1346                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1347                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1348         seq_printf(m, "\nQueryInfos: %d total %d failed",
1349                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1350                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1351         seq_printf(m, "\nSetInfos: %d total %d failed",
1352                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1353                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1354         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1355                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1356                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1357 }
1358
1359 static void
1360 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1361 {
1362         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1363         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1364
1365         cfile->fid.persistent_fid = fid->persistent_fid;
1366         cfile->fid.volatile_fid = fid->volatile_fid;
1367 #ifdef CONFIG_CIFS_DEBUG2
1368         cfile->fid.mid = fid->mid;
1369 #endif /* CIFS_DEBUG2 */
1370         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1371                                       &fid->purge_cache);
1372         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1373         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1374 }
1375
1376 static void
1377 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1378                 struct cifs_fid *fid)
1379 {
1380         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1381 }
1382
1383 static void
1384 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1385                    struct cifsFileInfo *cfile)
1386 {
1387         struct smb2_file_network_open_info file_inf;
1388         struct inode *inode;
1389         int rc;
1390
1391         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1392                    cfile->fid.volatile_fid, &file_inf);
1393         if (rc)
1394                 return;
1395
1396         inode = d_inode(cfile->dentry);
1397
1398         spin_lock(&inode->i_lock);
1399         CIFS_I(inode)->time = jiffies;
1400
1401         /* Creation time should not need to be updated on close */
1402         if (file_inf.LastWriteTime)
1403                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1404         if (file_inf.ChangeTime)
1405                 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1406         if (file_inf.LastAccessTime)
1407                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1408
1409         /*
1410          * i_blocks is not related to (i_size / i_blksize),
1411          * but instead 512 byte (2**9) size is required for
1412          * calculating num blocks.
1413          */
1414         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1415                 inode->i_blocks =
1416                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1417
1418         /* End of file and Attributes should not have to be updated on close */
1419         spin_unlock(&inode->i_lock);
1420 }
1421
1422 static int
1423 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1424                      u64 persistent_fid, u64 volatile_fid,
1425                      struct copychunk_ioctl *pcchunk)
1426 {
1427         int rc;
1428         unsigned int ret_data_len;
1429         struct resume_key_req *res_key;
1430
1431         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1432                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1433                         NULL, 0 /* no input */, CIFSMaxBufSize,
1434                         (char **)&res_key, &ret_data_len);
1435
1436         if (rc) {
1437                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1438                 goto req_res_key_exit;
1439         }
1440         if (ret_data_len < sizeof(struct resume_key_req)) {
1441                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1442                 rc = -EINVAL;
1443                 goto req_res_key_exit;
1444         }
1445         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1446
1447 req_res_key_exit:
1448         kfree(res_key);
1449         return rc;
1450 }
1451
1452 static int
1453 smb2_ioctl_query_info(const unsigned int xid,
1454                       struct cifs_tcon *tcon,
1455                       struct cifs_sb_info *cifs_sb,
1456                       __le16 *path, int is_dir,
1457                       unsigned long p)
1458 {
1459         struct cifs_ses *ses = tcon->ses;
1460         char __user *arg = (char __user *)p;
1461         struct smb_query_info qi;
1462         struct smb_query_info __user *pqi;
1463         int rc = 0;
1464         int flags = 0;
1465         struct smb2_query_info_rsp *qi_rsp = NULL;
1466         struct smb2_ioctl_rsp *io_rsp = NULL;
1467         void *buffer = NULL;
1468         struct smb_rqst rqst[3];
1469         int resp_buftype[3];
1470         struct kvec rsp_iov[3];
1471         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1472         struct cifs_open_parms oparms;
1473         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1474         struct cifs_fid fid;
1475         struct kvec qi_iov[1];
1476         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1477         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1478         struct kvec close_iov[1];
1479         unsigned int size[2];
1480         void *data[2];
1481         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1482
1483         memset(rqst, 0, sizeof(rqst));
1484         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1485         memset(rsp_iov, 0, sizeof(rsp_iov));
1486
1487         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1488                 return -EFAULT;
1489
1490         if (qi.output_buffer_length > 1024)
1491                 return -EINVAL;
1492
1493         if (!ses || !(ses->server))
1494                 return -EIO;
1495
1496         if (smb3_encryption_required(tcon))
1497                 flags |= CIFS_TRANSFORM_REQ;
1498
1499         buffer = memdup_user(arg + sizeof(struct smb_query_info),
1500                              qi.output_buffer_length);
1501         if (IS_ERR(buffer))
1502                 return PTR_ERR(buffer);
1503
1504         /* Open */
1505         memset(&open_iov, 0, sizeof(open_iov));
1506         rqst[0].rq_iov = open_iov;
1507         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1508
1509         memset(&oparms, 0, sizeof(oparms));
1510         oparms.tcon = tcon;
1511         oparms.disposition = FILE_OPEN;
1512         oparms.create_options = cifs_create_options(cifs_sb, create_options);
1513         oparms.fid = &fid;
1514         oparms.reconnect = false;
1515
1516         if (qi.flags & PASSTHRU_FSCTL) {
1517                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1518                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1519                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1520                         break;
1521                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1522                         oparms.desired_access = GENERIC_ALL;
1523                         break;
1524                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1525                         oparms.desired_access = GENERIC_READ;
1526                         break;
1527                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1528                         oparms.desired_access = GENERIC_WRITE;
1529                         break;
1530                 }
1531         } else if (qi.flags & PASSTHRU_SET_INFO) {
1532                 oparms.desired_access = GENERIC_WRITE;
1533         } else {
1534                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1535         }
1536
1537         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
1538         if (rc)
1539                 goto iqinf_exit;
1540         smb2_set_next_command(tcon, &rqst[0]);
1541
1542         /* Query */
1543         if (qi.flags & PASSTHRU_FSCTL) {
1544                 /* Can eventually relax perm check since server enforces too */
1545                 if (!capable(CAP_SYS_ADMIN))
1546                         rc = -EPERM;
1547                 else  {
1548                         memset(&io_iov, 0, sizeof(io_iov));
1549                         rqst[1].rq_iov = io_iov;
1550                         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1551
1552                         rc = SMB2_ioctl_init(tcon, &rqst[1],
1553                                              COMPOUND_FID, COMPOUND_FID,
1554                                              qi.info_type, true, buffer,
1555                                              qi.output_buffer_length,
1556                                              CIFSMaxBufSize -
1557                                              MAX_SMB2_CREATE_RESPONSE_SIZE -
1558                                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
1559                 }
1560         } else if (qi.flags == PASSTHRU_SET_INFO) {
1561                 /* Can eventually relax perm check since server enforces too */
1562                 if (!capable(CAP_SYS_ADMIN))
1563                         rc = -EPERM;
1564                 else  {
1565                         memset(&si_iov, 0, sizeof(si_iov));
1566                         rqst[1].rq_iov = si_iov;
1567                         rqst[1].rq_nvec = 1;
1568
1569                         size[0] = 8;
1570                         data[0] = buffer;
1571
1572                         rc = SMB2_set_info_init(tcon, &rqst[1],
1573                                         COMPOUND_FID, COMPOUND_FID,
1574                                         current->tgid,
1575                                         FILE_END_OF_FILE_INFORMATION,
1576                                         SMB2_O_INFO_FILE, 0, data, size);
1577                 }
1578         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1579                 memset(&qi_iov, 0, sizeof(qi_iov));
1580                 rqst[1].rq_iov = qi_iov;
1581                 rqst[1].rq_nvec = 1;
1582
1583                 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
1584                                   COMPOUND_FID, qi.file_info_class,
1585                                   qi.info_type, qi.additional_information,
1586                                   qi.input_buffer_length,
1587                                   qi.output_buffer_length, buffer);
1588         } else { /* unknown flags */
1589                 cifs_tcon_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags);
1590                 rc = -EINVAL;
1591         }
1592
1593         if (rc)
1594                 goto iqinf_exit;
1595         smb2_set_next_command(tcon, &rqst[1]);
1596         smb2_set_related(&rqst[1]);
1597
1598         /* Close */
1599         memset(&close_iov, 0, sizeof(close_iov));
1600         rqst[2].rq_iov = close_iov;
1601         rqst[2].rq_nvec = 1;
1602
1603         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1604         if (rc)
1605                 goto iqinf_exit;
1606         smb2_set_related(&rqst[2]);
1607
1608         rc = compound_send_recv(xid, ses, flags, 3, rqst,
1609                                 resp_buftype, rsp_iov);
1610         if (rc)
1611                 goto iqinf_exit;
1612
1613         /* No need to bump num_remote_opens since handle immediately closed */
1614         if (qi.flags & PASSTHRU_FSCTL) {
1615                 pqi = (struct smb_query_info __user *)arg;
1616                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1617                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1618                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1619                 if (qi.input_buffer_length > 0 &&
1620                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1621                     > rsp_iov[1].iov_len)
1622                         goto e_fault;
1623
1624                 if (copy_to_user(&pqi->input_buffer_length,
1625                                  &qi.input_buffer_length,
1626                                  sizeof(qi.input_buffer_length)))
1627                         goto e_fault;
1628
1629                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1630                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1631                                  qi.input_buffer_length))
1632                         goto e_fault;
1633         } else {
1634                 pqi = (struct smb_query_info __user *)arg;
1635                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1636                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1637                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1638                 if (copy_to_user(&pqi->input_buffer_length,
1639                                  &qi.input_buffer_length,
1640                                  sizeof(qi.input_buffer_length)))
1641                         goto e_fault;
1642
1643                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1644                                  qi.input_buffer_length))
1645                         goto e_fault;
1646         }
1647
1648  iqinf_exit:
1649         kfree(buffer);
1650         SMB2_open_free(&rqst[0]);
1651         if (qi.flags & PASSTHRU_FSCTL)
1652                 SMB2_ioctl_free(&rqst[1]);
1653         else
1654                 SMB2_query_info_free(&rqst[1]);
1655
1656         SMB2_close_free(&rqst[2]);
1657         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1658         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1659         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1660         return rc;
1661
1662 e_fault:
1663         rc = -EFAULT;
1664         goto iqinf_exit;
1665 }
1666
1667 static ssize_t
1668 smb2_copychunk_range(const unsigned int xid,
1669                         struct cifsFileInfo *srcfile,
1670                         struct cifsFileInfo *trgtfile, u64 src_off,
1671                         u64 len, u64 dest_off)
1672 {
1673         int rc;
1674         unsigned int ret_data_len;
1675         struct copychunk_ioctl *pcchunk;
1676         struct copychunk_ioctl_rsp *retbuf = NULL;
1677         struct cifs_tcon *tcon;
1678         int chunks_copied = 0;
1679         bool chunk_sizes_updated = false;
1680         ssize_t bytes_written, total_bytes_written = 0;
1681
1682         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1683
1684         if (pcchunk == NULL)
1685                 return -ENOMEM;
1686
1687         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1688         /* Request a key from the server to identify the source of the copy */
1689         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1690                                 srcfile->fid.persistent_fid,
1691                                 srcfile->fid.volatile_fid, pcchunk);
1692
1693         /* Note: request_res_key sets res_key null only if rc !=0 */
1694         if (rc)
1695                 goto cchunk_out;
1696
1697         /* For now array only one chunk long, will make more flexible later */
1698         pcchunk->ChunkCount = cpu_to_le32(1);
1699         pcchunk->Reserved = 0;
1700         pcchunk->Reserved2 = 0;
1701
1702         tcon = tlink_tcon(trgtfile->tlink);
1703
1704         while (len > 0) {
1705                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1706                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1707                 pcchunk->Length =
1708                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1709
1710                 /* Request server copy to target from src identified by key */
1711                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1712                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1713                         true /* is_fsctl */, (char *)pcchunk,
1714                         sizeof(struct copychunk_ioctl), CIFSMaxBufSize,
1715                         (char **)&retbuf, &ret_data_len);
1716                 if (rc == 0) {
1717                         if (ret_data_len !=
1718                                         sizeof(struct copychunk_ioctl_rsp)) {
1719                                 cifs_tcon_dbg(VFS, "invalid cchunk response size\n");
1720                                 rc = -EIO;
1721                                 goto cchunk_out;
1722                         }
1723                         if (retbuf->TotalBytesWritten == 0) {
1724                                 cifs_dbg(FYI, "no bytes copied\n");
1725                                 rc = -EIO;
1726                                 goto cchunk_out;
1727                         }
1728                         /*
1729                          * Check if server claimed to write more than we asked
1730                          */
1731                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1732                             le32_to_cpu(pcchunk->Length)) {
1733                                 cifs_tcon_dbg(VFS, "invalid copy chunk response\n");
1734                                 rc = -EIO;
1735                                 goto cchunk_out;
1736                         }
1737                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1738                                 cifs_tcon_dbg(VFS, "invalid num chunks written\n");
1739                                 rc = -EIO;
1740                                 goto cchunk_out;
1741                         }
1742                         chunks_copied++;
1743
1744                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1745                         src_off += bytes_written;
1746                         dest_off += bytes_written;
1747                         len -= bytes_written;
1748                         total_bytes_written += bytes_written;
1749
1750                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1751                                 le32_to_cpu(retbuf->ChunksWritten),
1752                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1753                                 bytes_written);
1754                 } else if (rc == -EINVAL) {
1755                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1756                                 goto cchunk_out;
1757
1758                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1759                                 le32_to_cpu(retbuf->ChunksWritten),
1760                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1761                                 le32_to_cpu(retbuf->TotalBytesWritten));
1762
1763                         /*
1764                          * Check if this is the first request using these sizes,
1765                          * (ie check if copy succeed once with original sizes
1766                          * and check if the server gave us different sizes after
1767                          * we already updated max sizes on previous request).
1768                          * if not then why is the server returning an error now
1769                          */
1770                         if ((chunks_copied != 0) || chunk_sizes_updated)
1771                                 goto cchunk_out;
1772
1773                         /* Check that server is not asking us to grow size */
1774                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1775                                         tcon->max_bytes_chunk)
1776                                 tcon->max_bytes_chunk =
1777                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1778                         else
1779                                 goto cchunk_out; /* server gave us bogus size */
1780
1781                         /* No need to change MaxChunks since already set to 1 */
1782                         chunk_sizes_updated = true;
1783                 } else
1784                         goto cchunk_out;
1785         }
1786
1787 cchunk_out:
1788         kfree(pcchunk);
1789         kfree(retbuf);
1790         if (rc)
1791                 return rc;
1792         else
1793                 return total_bytes_written;
1794 }
1795
1796 static int
1797 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1798                 struct cifs_fid *fid)
1799 {
1800         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1801 }
1802
1803 static unsigned int
1804 smb2_read_data_offset(char *buf)
1805 {
1806         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1807
1808         return rsp->DataOffset;
1809 }
1810
1811 static unsigned int
1812 smb2_read_data_length(char *buf, bool in_remaining)
1813 {
1814         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1815
1816         if (in_remaining)
1817                 return le32_to_cpu(rsp->DataRemaining);
1818
1819         return le32_to_cpu(rsp->DataLength);
1820 }
1821
1822
1823 static int
1824 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1825                struct cifs_io_parms *parms, unsigned int *bytes_read,
1826                char **buf, int *buf_type)
1827 {
1828         parms->persistent_fid = pfid->persistent_fid;
1829         parms->volatile_fid = pfid->volatile_fid;
1830         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1831 }
1832
1833 static int
1834 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1835                 struct cifs_io_parms *parms, unsigned int *written,
1836                 struct kvec *iov, unsigned long nr_segs)
1837 {
1838
1839         parms->persistent_fid = pfid->persistent_fid;
1840         parms->volatile_fid = pfid->volatile_fid;
1841         return SMB2_write(xid, parms, written, iov, nr_segs);
1842 }
1843
1844 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1845 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1846                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1847 {
1848         struct cifsInodeInfo *cifsi;
1849         int rc;
1850
1851         cifsi = CIFS_I(inode);
1852
1853         /* if file already sparse don't bother setting sparse again */
1854         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1855                 return true; /* already sparse */
1856
1857         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1858                 return true; /* already not sparse */
1859
1860         /*
1861          * Can't check for sparse support on share the usual way via the
1862          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1863          * since Samba server doesn't set the flag on the share, yet
1864          * supports the set sparse FSCTL and returns sparse correctly
1865          * in the file attributes. If we fail setting sparse though we
1866          * mark that server does not support sparse files for this share
1867          * to avoid repeatedly sending the unsupported fsctl to server
1868          * if the file is repeatedly extended.
1869          */
1870         if (tcon->broken_sparse_sup)
1871                 return false;
1872
1873         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1874                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1875                         true /* is_fctl */,
1876                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1877         if (rc) {
1878                 tcon->broken_sparse_sup = true;
1879                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1880                 return false;
1881         }
1882
1883         if (setsparse)
1884                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1885         else
1886                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1887
1888         return true;
1889 }
1890
1891 static int
1892 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1893                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1894 {
1895         __le64 eof = cpu_to_le64(size);
1896         struct inode *inode;
1897
1898         /*
1899          * If extending file more than one page make sparse. Many Linux fs
1900          * make files sparse by default when extending via ftruncate
1901          */
1902         inode = d_inode(cfile->dentry);
1903
1904         if (!set_alloc && (size > inode->i_size + 8192)) {
1905                 __u8 set_sparse = 1;
1906
1907                 /* whether set sparse succeeds or not, extend the file */
1908                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1909         }
1910
1911         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1912                             cfile->fid.volatile_fid, cfile->pid, &eof);
1913 }
1914
1915 static int
1916 smb2_duplicate_extents(const unsigned int xid,
1917                         struct cifsFileInfo *srcfile,
1918                         struct cifsFileInfo *trgtfile, u64 src_off,
1919                         u64 len, u64 dest_off)
1920 {
1921         int rc;
1922         unsigned int ret_data_len;
1923         struct duplicate_extents_to_file dup_ext_buf;
1924         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1925
1926         /* server fileays advertise duplicate extent support with this flag */
1927         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1928              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1929                 return -EOPNOTSUPP;
1930
1931         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1932         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1933         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1934         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1935         dup_ext_buf.ByteCount = cpu_to_le64(len);
1936         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1937                 src_off, dest_off, len);
1938
1939         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1940         if (rc)
1941                 goto duplicate_extents_out;
1942
1943         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1944                         trgtfile->fid.volatile_fid,
1945                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1946                         true /* is_fsctl */,
1947                         (char *)&dup_ext_buf,
1948                         sizeof(struct duplicate_extents_to_file),
1949                         CIFSMaxBufSize, NULL,
1950                         &ret_data_len);
1951
1952         if (ret_data_len > 0)
1953                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1954
1955 duplicate_extents_out:
1956         return rc;
1957 }
1958
1959 static int
1960 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1961                    struct cifsFileInfo *cfile)
1962 {
1963         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1964                             cfile->fid.volatile_fid);
1965 }
1966
1967 static int
1968 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1969                    struct cifsFileInfo *cfile)
1970 {
1971         struct fsctl_set_integrity_information_req integr_info;
1972         unsigned int ret_data_len;
1973
1974         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1975         integr_info.Flags = 0;
1976         integr_info.Reserved = 0;
1977
1978         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1979                         cfile->fid.volatile_fid,
1980                         FSCTL_SET_INTEGRITY_INFORMATION,
1981                         true /* is_fsctl */,
1982                         (char *)&integr_info,
1983                         sizeof(struct fsctl_set_integrity_information_req),
1984                         CIFSMaxBufSize, NULL,
1985                         &ret_data_len);
1986
1987 }
1988
1989 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1990 #define GMT_TOKEN_SIZE 50
1991
1992 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1993
1994 /*
1995  * Input buffer contains (empty) struct smb_snapshot array with size filled in
1996  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1997  */
1998 static int
1999 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2000                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2001 {
2002         char *retbuf = NULL;
2003         unsigned int ret_data_len = 0;
2004         int rc;
2005         u32 max_response_size;
2006         struct smb_snapshot_array snapshot_in;
2007
2008         /*
2009          * On the first query to enumerate the list of snapshots available
2010          * for this volume the buffer begins with 0 (number of snapshots
2011          * which can be returned is zero since at that point we do not know
2012          * how big the buffer needs to be). On the second query,
2013          * it (ret_data_len) is set to number of snapshots so we can
2014          * know to set the maximum response size larger (see below).
2015          */
2016         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2017                 return -EFAULT;
2018
2019         /*
2020          * Note that for snapshot queries that servers like Azure expect that
2021          * the first query be minimal size (and just used to get the number/size
2022          * of previous versions) so response size must be specified as EXACTLY
2023          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2024          * of eight bytes.
2025          */
2026         if (ret_data_len == 0)
2027                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2028         else
2029                 max_response_size = CIFSMaxBufSize;
2030
2031         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2032                         cfile->fid.volatile_fid,
2033                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2034                         true /* is_fsctl */,
2035                         NULL, 0 /* no input data */, max_response_size,
2036                         (char **)&retbuf,
2037                         &ret_data_len);
2038         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2039                         rc, ret_data_len);
2040         if (rc)
2041                 return rc;
2042
2043         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2044                 /* Fixup buffer */
2045                 if (copy_from_user(&snapshot_in, ioc_buf,
2046                     sizeof(struct smb_snapshot_array))) {
2047                         rc = -EFAULT;
2048                         kfree(retbuf);
2049                         return rc;
2050                 }
2051
2052                 /*
2053                  * Check for min size, ie not large enough to fit even one GMT
2054                  * token (snapshot).  On the first ioctl some users may pass in
2055                  * smaller size (or zero) to simply get the size of the array
2056                  * so the user space caller can allocate sufficient memory
2057                  * and retry the ioctl again with larger array size sufficient
2058                  * to hold all of the snapshot GMT tokens on the second try.
2059                  */
2060                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2061                         ret_data_len = sizeof(struct smb_snapshot_array);
2062
2063                 /*
2064                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2065                  * the snapshot array (of 50 byte GMT tokens) each
2066                  * representing an available previous version of the data
2067                  */
2068                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2069                                         sizeof(struct smb_snapshot_array)))
2070                         ret_data_len = snapshot_in.snapshot_array_size +
2071                                         sizeof(struct smb_snapshot_array);
2072
2073                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2074                         rc = -EFAULT;
2075         }
2076
2077         kfree(retbuf);
2078         return rc;
2079 }
2080
2081
2082
2083 static int
2084 smb3_notify(const unsigned int xid, struct file *pfile,
2085             void __user *ioc_buf)
2086 {
2087         struct smb3_notify notify;
2088         struct dentry *dentry = pfile->f_path.dentry;
2089         struct inode *inode = file_inode(pfile);
2090         struct cifs_sb_info *cifs_sb;
2091         struct cifs_open_parms oparms;
2092         struct cifs_fid fid;
2093         struct cifs_tcon *tcon;
2094         unsigned char *path = NULL;
2095         __le16 *utf16_path = NULL;
2096         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2097         int rc = 0;
2098
2099         path = build_path_from_dentry(dentry);
2100         if (path == NULL)
2101                 return -ENOMEM;
2102
2103         cifs_sb = CIFS_SB(inode->i_sb);
2104
2105         utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb);
2106         if (utf16_path == NULL) {
2107                 rc = -ENOMEM;
2108                 goto notify_exit;
2109         }
2110
2111         if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2112                 rc = -EFAULT;
2113                 goto notify_exit;
2114         }
2115
2116         tcon = cifs_sb_master_tcon(cifs_sb);
2117         oparms.tcon = tcon;
2118         oparms.desired_access = FILE_READ_ATTRIBUTES;
2119         oparms.disposition = FILE_OPEN;
2120         oparms.create_options = cifs_create_options(cifs_sb, 0);
2121         oparms.fid = &fid;
2122         oparms.reconnect = false;
2123
2124         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2125         if (rc)
2126                 goto notify_exit;
2127
2128         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2129                                 notify.watch_tree, notify.completion_filter);
2130
2131         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2132
2133         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2134
2135 notify_exit:
2136         kfree(path);
2137         kfree(utf16_path);
2138         return rc;
2139 }
2140
2141 static int
2142 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2143                      const char *path, struct cifs_sb_info *cifs_sb,
2144                      struct cifs_fid *fid, __u16 search_flags,
2145                      struct cifs_search_info *srch_inf)
2146 {
2147         __le16 *utf16_path;
2148         struct smb_rqst rqst[2];
2149         struct kvec rsp_iov[2];
2150         int resp_buftype[2];
2151         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2152         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2153         int rc, flags = 0;
2154         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2155         struct cifs_open_parms oparms;
2156         struct smb2_query_directory_rsp *qd_rsp = NULL;
2157         struct smb2_create_rsp *op_rsp = NULL;
2158
2159         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2160         if (!utf16_path)
2161                 return -ENOMEM;
2162
2163         if (smb3_encryption_required(tcon))
2164                 flags |= CIFS_TRANSFORM_REQ;
2165
2166         memset(rqst, 0, sizeof(rqst));
2167         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2168         memset(rsp_iov, 0, sizeof(rsp_iov));
2169
2170         /* Open */
2171         memset(&open_iov, 0, sizeof(open_iov));
2172         rqst[0].rq_iov = open_iov;
2173         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2174
2175         oparms.tcon = tcon;
2176         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2177         oparms.disposition = FILE_OPEN;
2178         oparms.create_options = cifs_create_options(cifs_sb, 0);
2179         oparms.fid = fid;
2180         oparms.reconnect = false;
2181
2182         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2183         if (rc)
2184                 goto qdf_free;
2185         smb2_set_next_command(tcon, &rqst[0]);
2186
2187         /* Query directory */
2188         srch_inf->entries_in_buffer = 0;
2189         srch_inf->index_of_last_entry = 2;
2190
2191         memset(&qd_iov, 0, sizeof(qd_iov));
2192         rqst[1].rq_iov = qd_iov;
2193         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2194
2195         rc = SMB2_query_directory_init(xid, tcon, &rqst[1],
2196                                        COMPOUND_FID, COMPOUND_FID,
2197                                        0, srch_inf->info_level);
2198         if (rc)
2199                 goto qdf_free;
2200
2201         smb2_set_related(&rqst[1]);
2202
2203         rc = compound_send_recv(xid, tcon->ses, flags, 2, rqst,
2204                                 resp_buftype, rsp_iov);
2205
2206         /* If the open failed there is nothing to do */
2207         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2208         if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
2209                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2210                 goto qdf_free;
2211         }
2212         fid->persistent_fid = op_rsp->PersistentFileId;
2213         fid->volatile_fid = op_rsp->VolatileFileId;
2214
2215         /* Anything else than ENODATA means a genuine error */
2216         if (rc && rc != -ENODATA) {
2217                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2218                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2219                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2220                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2221                 goto qdf_free;
2222         }
2223
2224         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2225         if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
2226                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2227                                           tcon->tid, tcon->ses->Suid, 0, 0);
2228                 srch_inf->endOfSearch = true;
2229                 rc = 0;
2230                 goto qdf_free;
2231         }
2232
2233         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2234                                         srch_inf);
2235         if (rc) {
2236                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2237                         tcon->ses->Suid, 0, 0, rc);
2238                 goto qdf_free;
2239         }
2240         resp_buftype[1] = CIFS_NO_BUFFER;
2241
2242         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2243                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2244
2245  qdf_free:
2246         kfree(utf16_path);
2247         SMB2_open_free(&rqst[0]);
2248         SMB2_query_directory_free(&rqst[1]);
2249         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2250         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2251         return rc;
2252 }
2253
2254 static int
2255 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2256                     struct cifs_fid *fid, __u16 search_flags,
2257                     struct cifs_search_info *srch_inf)
2258 {
2259         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2260                                     fid->volatile_fid, 0, srch_inf);
2261 }
2262
2263 static int
2264 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2265                struct cifs_fid *fid)
2266 {
2267         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2268 }
2269
2270 /*
2271  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2272  * the number of credits and return true. Otherwise - return false.
2273  */
2274 static bool
2275 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2276 {
2277         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2278
2279         if (shdr->Status != STATUS_PENDING)
2280                 return false;
2281
2282         if (shdr->CreditRequest) {
2283                 spin_lock(&server->req_lock);
2284                 server->credits += le16_to_cpu(shdr->CreditRequest);
2285                 spin_unlock(&server->req_lock);
2286                 wake_up(&server->request_q);
2287         }
2288
2289         return true;
2290 }
2291
2292 static bool
2293 smb2_is_session_expired(char *buf)
2294 {
2295         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2296
2297         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2298             shdr->Status != STATUS_USER_SESSION_DELETED)
2299                 return false;
2300
2301         trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2302                                le16_to_cpu(shdr->Command),
2303                                le64_to_cpu(shdr->MessageId));
2304         cifs_dbg(FYI, "Session expired or deleted\n");
2305
2306         return true;
2307 }
2308
2309 static int
2310 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2311                      struct cifsInodeInfo *cinode)
2312 {
2313         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2314                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2315                                         smb2_get_lease_state(cinode));
2316
2317         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2318                                  fid->volatile_fid,
2319                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2320 }
2321
2322 void
2323 smb2_set_related(struct smb_rqst *rqst)
2324 {
2325         struct smb2_sync_hdr *shdr;
2326
2327         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2328         if (shdr == NULL) {
2329                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2330                 return;
2331         }
2332         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2333 }
2334
2335 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2336
2337 void
2338 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2339 {
2340         struct smb2_sync_hdr *shdr;
2341         struct cifs_ses *ses = tcon->ses;
2342         struct TCP_Server_Info *server = ses->server;
2343         unsigned long len = smb_rqst_len(server, rqst);
2344         int i, num_padding;
2345
2346         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2347         if (shdr == NULL) {
2348                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2349                 return;
2350         }
2351
2352         /* SMB headers in a compound are 8 byte aligned. */
2353
2354         /* No padding needed */
2355         if (!(len & 7))
2356                 goto finished;
2357
2358         num_padding = 8 - (len & 7);
2359         if (!smb3_encryption_required(tcon)) {
2360                 /*
2361                  * If we do not have encryption then we can just add an extra
2362                  * iov for the padding.
2363                  */
2364                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2365                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2366                 rqst->rq_nvec++;
2367                 len += num_padding;
2368         } else {
2369                 /*
2370                  * We can not add a small padding iov for the encryption case
2371                  * because the encryption framework can not handle the padding
2372                  * iovs.
2373                  * We have to flatten this into a single buffer and add
2374                  * the padding to it.
2375                  */
2376                 for (i = 1; i < rqst->rq_nvec; i++) {
2377                         memcpy(rqst->rq_iov[0].iov_base +
2378                                rqst->rq_iov[0].iov_len,
2379                                rqst->rq_iov[i].iov_base,
2380                                rqst->rq_iov[i].iov_len);
2381                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2382                 }
2383                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2384                        0, num_padding);
2385                 rqst->rq_iov[0].iov_len += num_padding;
2386                 len += num_padding;
2387                 rqst->rq_nvec = 1;
2388         }
2389
2390  finished:
2391         shdr->NextCommand = cpu_to_le32(len);
2392 }
2393
2394 /*
2395  * Passes the query info response back to the caller on success.
2396  * Caller need to free this with free_rsp_buf().
2397  */
2398 int
2399 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2400                          __le16 *utf16_path, u32 desired_access,
2401                          u32 class, u32 type, u32 output_len,
2402                          struct kvec *rsp, int *buftype,
2403                          struct cifs_sb_info *cifs_sb)
2404 {
2405         struct cifs_ses *ses = tcon->ses;
2406         int flags = 0;
2407         struct smb_rqst rqst[3];
2408         int resp_buftype[3];
2409         struct kvec rsp_iov[3];
2410         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2411         struct kvec qi_iov[1];
2412         struct kvec close_iov[1];
2413         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2414         struct cifs_open_parms oparms;
2415         struct cifs_fid fid;
2416         int rc;
2417
2418         if (smb3_encryption_required(tcon))
2419                 flags |= CIFS_TRANSFORM_REQ;
2420
2421         memset(rqst, 0, sizeof(rqst));
2422         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2423         memset(rsp_iov, 0, sizeof(rsp_iov));
2424
2425         memset(&open_iov, 0, sizeof(open_iov));
2426         rqst[0].rq_iov = open_iov;
2427         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2428
2429         oparms.tcon = tcon;
2430         oparms.desired_access = desired_access;
2431         oparms.disposition = FILE_OPEN;
2432         oparms.create_options = cifs_create_options(cifs_sb, 0);
2433         oparms.fid = &fid;
2434         oparms.reconnect = false;
2435
2436         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2437         if (rc)
2438                 goto qic_exit;
2439         smb2_set_next_command(tcon, &rqst[0]);
2440
2441         memset(&qi_iov, 0, sizeof(qi_iov));
2442         rqst[1].rq_iov = qi_iov;
2443         rqst[1].rq_nvec = 1;
2444
2445         rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
2446                                   class, type, 0,
2447                                   output_len, 0,
2448                                   NULL);
2449         if (rc)
2450                 goto qic_exit;
2451         smb2_set_next_command(tcon, &rqst[1]);
2452         smb2_set_related(&rqst[1]);
2453
2454         memset(&close_iov, 0, sizeof(close_iov));
2455         rqst[2].rq_iov = close_iov;
2456         rqst[2].rq_nvec = 1;
2457
2458         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2459         if (rc)
2460                 goto qic_exit;
2461         smb2_set_related(&rqst[2]);
2462
2463         rc = compound_send_recv(xid, ses, flags, 3, rqst,
2464                                 resp_buftype, rsp_iov);
2465         if (rc) {
2466                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2467                 if (rc == -EREMCHG) {
2468                         tcon->need_reconnect = true;
2469                         printk_once(KERN_WARNING "server share %s deleted\n",
2470                                     tcon->treeName);
2471                 }
2472                 goto qic_exit;
2473         }
2474         *rsp = rsp_iov[1];
2475         *buftype = resp_buftype[1];
2476
2477  qic_exit:
2478         SMB2_open_free(&rqst[0]);
2479         SMB2_query_info_free(&rqst[1]);
2480         SMB2_close_free(&rqst[2]);
2481         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2482         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2483         return rc;
2484 }
2485
2486 static int
2487 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2488              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2489 {
2490         struct smb2_query_info_rsp *rsp;
2491         struct smb2_fs_full_size_info *info = NULL;
2492         __le16 utf16_path = 0; /* Null - open root of share */
2493         struct kvec rsp_iov = {NULL, 0};
2494         int buftype = CIFS_NO_BUFFER;
2495         int rc;
2496
2497
2498         rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2499                                       FILE_READ_ATTRIBUTES,
2500                                       FS_FULL_SIZE_INFORMATION,
2501                                       SMB2_O_INFO_FILESYSTEM,
2502                                       sizeof(struct smb2_fs_full_size_info),
2503                                       &rsp_iov, &buftype, cifs_sb);
2504         if (rc)
2505                 goto qfs_exit;
2506
2507         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2508         buf->f_type = SMB2_MAGIC_NUMBER;
2509         info = (struct smb2_fs_full_size_info *)(
2510                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2511         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2512                                le32_to_cpu(rsp->OutputBufferLength),
2513                                &rsp_iov,
2514                                sizeof(struct smb2_fs_full_size_info));
2515         if (!rc)
2516                 smb2_copy_fs_info_to_kstatfs(info, buf);
2517
2518 qfs_exit:
2519         free_rsp_buf(buftype, rsp_iov.iov_base);
2520         return rc;
2521 }
2522
2523 static int
2524 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2525                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2526 {
2527         int rc;
2528         __le16 srch_path = 0; /* Null - open root of share */
2529         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2530         struct cifs_open_parms oparms;
2531         struct cifs_fid fid;
2532
2533         if (!tcon->posix_extensions)
2534                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2535
2536         oparms.tcon = tcon;
2537         oparms.desired_access = FILE_READ_ATTRIBUTES;
2538         oparms.disposition = FILE_OPEN;
2539         oparms.create_options = cifs_create_options(cifs_sb, 0);
2540         oparms.fid = &fid;
2541         oparms.reconnect = false;
2542
2543         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
2544         if (rc)
2545                 return rc;
2546
2547         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2548                                    fid.volatile_fid, buf);
2549         buf->f_type = SMB2_MAGIC_NUMBER;
2550         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2551         return rc;
2552 }
2553
2554 static bool
2555 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2556 {
2557         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2558                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2559 }
2560
2561 static int
2562 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2563                __u64 length, __u32 type, int lock, int unlock, bool wait)
2564 {
2565         if (unlock && !lock)
2566                 type = SMB2_LOCKFLAG_UNLOCK;
2567         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2568                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2569                          current->tgid, length, offset, type, wait);
2570 }
2571
2572 static void
2573 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2574 {
2575         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2576 }
2577
2578 static void
2579 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2580 {
2581         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2582 }
2583
2584 static void
2585 smb2_new_lease_key(struct cifs_fid *fid)
2586 {
2587         generate_random_uuid(fid->lease_key);
2588 }
2589
2590 static int
2591 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2592                    const char *search_name,
2593                    struct dfs_info3_param **target_nodes,
2594                    unsigned int *num_of_nodes,
2595                    const struct nls_table *nls_codepage, int remap)
2596 {
2597         int rc;
2598         __le16 *utf16_path = NULL;
2599         int utf16_path_len = 0;
2600         struct cifs_tcon *tcon;
2601         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2602         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2603         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2604
2605         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2606
2607         /*
2608          * Try to use the IPC tcon, otherwise just use any
2609          */
2610         tcon = ses->tcon_ipc;
2611         if (tcon == NULL) {
2612                 spin_lock(&cifs_tcp_ses_lock);
2613                 tcon = list_first_entry_or_null(&ses->tcon_list,
2614                                                 struct cifs_tcon,
2615                                                 tcon_list);
2616                 if (tcon)
2617                         tcon->tc_count++;
2618                 spin_unlock(&cifs_tcp_ses_lock);
2619         }
2620
2621         if (tcon == NULL) {
2622                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2623                          ses);
2624                 rc = -ENOTCONN;
2625                 goto out;
2626         }
2627
2628         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2629                                            &utf16_path_len,
2630                                            nls_codepage, remap);
2631         if (!utf16_path) {
2632                 rc = -ENOMEM;
2633                 goto out;
2634         }
2635
2636         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2637         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2638         if (!dfs_req) {
2639                 rc = -ENOMEM;
2640                 goto out;
2641         }
2642
2643         /* Highest DFS referral version understood */
2644         dfs_req->MaxReferralLevel = DFS_VERSION;
2645
2646         /* Path to resolve in an UTF-16 null-terminated string */
2647         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2648
2649         do {
2650                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2651                                 FSCTL_DFS_GET_REFERRALS,
2652                                 true /* is_fsctl */,
2653                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2654                                 (char **)&dfs_rsp, &dfs_rsp_size);
2655         } while (rc == -EAGAIN);
2656
2657         if (rc) {
2658                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2659                         cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2660                 goto out;
2661         }
2662
2663         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2664                                  num_of_nodes, target_nodes,
2665                                  nls_codepage, remap, search_name,
2666                                  true /* is_unicode */);
2667         if (rc) {
2668                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2669                 goto out;
2670         }
2671
2672  out:
2673         if (tcon && !tcon->ipc) {
2674                 /* ipc tcons are not refcounted */
2675                 spin_lock(&cifs_tcp_ses_lock);
2676                 tcon->tc_count--;
2677                 spin_unlock(&cifs_tcp_ses_lock);
2678         }
2679         kfree(utf16_path);
2680         kfree(dfs_req);
2681         kfree(dfs_rsp);
2682         return rc;
2683 }
2684
2685 static int
2686 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2687                       u32 plen, char **target_path,
2688                       struct cifs_sb_info *cifs_sb)
2689 {
2690         unsigned int len;
2691
2692         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2693         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2694
2695         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2696                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2697                         le64_to_cpu(symlink_buf->InodeType));
2698                 return -EOPNOTSUPP;
2699         }
2700
2701         *target_path = cifs_strndup_from_utf16(
2702                                 symlink_buf->PathBuffer,
2703                                 len, true, cifs_sb->local_nls);
2704         if (!(*target_path))
2705                 return -ENOMEM;
2706
2707         convert_delimiter(*target_path, '/');
2708         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2709
2710         return 0;
2711 }
2712
2713 static int
2714 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2715                       u32 plen, char **target_path,
2716                       struct cifs_sb_info *cifs_sb)
2717 {
2718         unsigned int sub_len;
2719         unsigned int sub_offset;
2720
2721         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2722
2723         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2724         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2725         if (sub_offset + 20 > plen ||
2726             sub_offset + sub_len + 20 > plen) {
2727                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2728                 return -EIO;
2729         }
2730
2731         *target_path = cifs_strndup_from_utf16(
2732                                 symlink_buf->PathBuffer + sub_offset,
2733                                 sub_len, true, cifs_sb->local_nls);
2734         if (!(*target_path))
2735                 return -ENOMEM;
2736
2737         convert_delimiter(*target_path, '/');
2738         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2739
2740         return 0;
2741 }
2742
2743 static int
2744 parse_reparse_point(struct reparse_data_buffer *buf,
2745                     u32 plen, char **target_path,
2746                     struct cifs_sb_info *cifs_sb)
2747 {
2748         if (plen < sizeof(struct reparse_data_buffer)) {
2749                 cifs_dbg(VFS, "reparse buffer is too small. Must be "
2750                          "at least 8 bytes but was %d\n", plen);
2751                 return -EIO;
2752         }
2753
2754         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2755             sizeof(struct reparse_data_buffer)) {
2756                 cifs_dbg(VFS, "srv returned invalid reparse buf "
2757                          "length: %d\n", plen);
2758                 return -EIO;
2759         }
2760
2761         /* See MS-FSCC 2.1.2 */
2762         switch (le32_to_cpu(buf->ReparseTag)) {
2763         case IO_REPARSE_TAG_NFS:
2764                 return parse_reparse_posix(
2765                         (struct reparse_posix_data *)buf,
2766                         plen, target_path, cifs_sb);
2767         case IO_REPARSE_TAG_SYMLINK:
2768                 return parse_reparse_symlink(
2769                         (struct reparse_symlink_data_buffer *)buf,
2770                         plen, target_path, cifs_sb);
2771         default:
2772                 cifs_dbg(VFS, "srv returned unknown symlink buffer "
2773                          "tag:0x%08x\n", le32_to_cpu(buf->ReparseTag));
2774                 return -EOPNOTSUPP;
2775         }
2776 }
2777
2778 #define SMB2_SYMLINK_STRUCT_SIZE \
2779         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2780
2781 static int
2782 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2783                    struct cifs_sb_info *cifs_sb, const char *full_path,
2784                    char **target_path, bool is_reparse_point)
2785 {
2786         int rc;
2787         __le16 *utf16_path = NULL;
2788         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2789         struct cifs_open_parms oparms;
2790         struct cifs_fid fid;
2791         struct kvec err_iov = {NULL, 0};
2792         struct smb2_err_rsp *err_buf = NULL;
2793         struct smb2_symlink_err_rsp *symlink;
2794         unsigned int sub_len;
2795         unsigned int sub_offset;
2796         unsigned int print_len;
2797         unsigned int print_offset;
2798         int flags = 0;
2799         struct smb_rqst rqst[3];
2800         int resp_buftype[3];
2801         struct kvec rsp_iov[3];
2802         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2803         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2804         struct kvec close_iov[1];
2805         struct smb2_create_rsp *create_rsp;
2806         struct smb2_ioctl_rsp *ioctl_rsp;
2807         struct reparse_data_buffer *reparse_buf;
2808         int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
2809         u32 plen;
2810
2811         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2812
2813         *target_path = NULL;
2814
2815         if (smb3_encryption_required(tcon))
2816                 flags |= CIFS_TRANSFORM_REQ;
2817
2818         memset(rqst, 0, sizeof(rqst));
2819         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2820         memset(rsp_iov, 0, sizeof(rsp_iov));
2821
2822         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2823         if (!utf16_path)
2824                 return -ENOMEM;
2825
2826         /* Open */
2827         memset(&open_iov, 0, sizeof(open_iov));
2828         rqst[0].rq_iov = open_iov;
2829         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2830
2831         memset(&oparms, 0, sizeof(oparms));
2832         oparms.tcon = tcon;
2833         oparms.desired_access = FILE_READ_ATTRIBUTES;
2834         oparms.disposition = FILE_OPEN;
2835         oparms.create_options = cifs_create_options(cifs_sb, create_options);
2836         oparms.fid = &fid;
2837         oparms.reconnect = false;
2838
2839         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2840         if (rc)
2841                 goto querty_exit;
2842         smb2_set_next_command(tcon, &rqst[0]);
2843
2844
2845         /* IOCTL */
2846         memset(&io_iov, 0, sizeof(io_iov));
2847         rqst[1].rq_iov = io_iov;
2848         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2849
2850         rc = SMB2_ioctl_init(tcon, &rqst[1], fid.persistent_fid,
2851                              fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
2852                              true /* is_fctl */, NULL, 0,
2853                              CIFSMaxBufSize -
2854                              MAX_SMB2_CREATE_RESPONSE_SIZE -
2855                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
2856         if (rc)
2857                 goto querty_exit;
2858
2859         smb2_set_next_command(tcon, &rqst[1]);
2860         smb2_set_related(&rqst[1]);
2861
2862
2863         /* Close */
2864         memset(&close_iov, 0, sizeof(close_iov));
2865         rqst[2].rq_iov = close_iov;
2866         rqst[2].rq_nvec = 1;
2867
2868         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2869         if (rc)
2870                 goto querty_exit;
2871
2872         smb2_set_related(&rqst[2]);
2873
2874         rc = compound_send_recv(xid, tcon->ses, flags, 3, rqst,
2875                                 resp_buftype, rsp_iov);
2876
2877         create_rsp = rsp_iov[0].iov_base;
2878         if (create_rsp && create_rsp->sync_hdr.Status)
2879                 err_iov = rsp_iov[0];
2880         ioctl_rsp = rsp_iov[1].iov_base;
2881
2882         /*
2883          * Open was successful and we got an ioctl response.
2884          */
2885         if ((rc == 0) && (is_reparse_point)) {
2886                 /* See MS-FSCC 2.3.23 */
2887
2888                 reparse_buf = (struct reparse_data_buffer *)
2889                         ((char *)ioctl_rsp +
2890                          le32_to_cpu(ioctl_rsp->OutputOffset));
2891                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
2892
2893                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
2894                     rsp_iov[1].iov_len) {
2895                         cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
2896                                  plen);
2897                         rc = -EIO;
2898                         goto querty_exit;
2899                 }
2900
2901                 rc = parse_reparse_point(reparse_buf, plen, target_path,
2902                                          cifs_sb);
2903                 goto querty_exit;
2904         }
2905
2906         if (!rc || !err_iov.iov_base) {
2907                 rc = -ENOENT;
2908                 goto querty_exit;
2909         }
2910
2911         err_buf = err_iov.iov_base;
2912         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
2913             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
2914                 rc = -EINVAL;
2915                 goto querty_exit;
2916         }
2917
2918         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2919         if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
2920             le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
2921                 rc = -EINVAL;
2922                 goto querty_exit;
2923         }
2924
2925         /* open must fail on symlink - reset rc */
2926         rc = 0;
2927         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2928         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
2929         print_len = le16_to_cpu(symlink->PrintNameLength);
2930         print_offset = le16_to_cpu(symlink->PrintNameOffset);
2931
2932         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
2933                 rc = -EINVAL;
2934                 goto querty_exit;
2935         }
2936
2937         if (err_iov.iov_len <
2938             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
2939                 rc = -EINVAL;
2940                 goto querty_exit;
2941         }
2942
2943         *target_path = cifs_strndup_from_utf16(
2944                                 (char *)symlink->PathBuffer + sub_offset,
2945                                 sub_len, true, cifs_sb->local_nls);
2946         if (!(*target_path)) {
2947                 rc = -ENOMEM;
2948                 goto querty_exit;
2949         }
2950         convert_delimiter(*target_path, '/');
2951         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2952
2953  querty_exit:
2954         cifs_dbg(FYI, "query symlink rc %d\n", rc);
2955         kfree(utf16_path);
2956         SMB2_open_free(&rqst[0]);
2957         SMB2_ioctl_free(&rqst[1]);
2958         SMB2_close_free(&rqst[2]);
2959         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2960         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2961         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2962         return rc;
2963 }
2964
2965 static struct cifs_ntsd *
2966 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2967                 const struct cifs_fid *cifsfid, u32 *pacllen)
2968 {
2969         struct cifs_ntsd *pntsd = NULL;
2970         unsigned int xid;
2971         int rc = -EOPNOTSUPP;
2972         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2973
2974         if (IS_ERR(tlink))
2975                 return ERR_CAST(tlink);
2976
2977         xid = get_xid();
2978         cifs_dbg(FYI, "trying to get acl\n");
2979
2980         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2981                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
2982         free_xid(xid);
2983
2984         cifs_put_tlink(tlink);
2985
2986         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2987         if (rc)
2988                 return ERR_PTR(rc);
2989         return pntsd;
2990
2991 }
2992
2993 static struct cifs_ntsd *
2994 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
2995                 const char *path, u32 *pacllen)
2996 {
2997         struct cifs_ntsd *pntsd = NULL;
2998         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2999         unsigned int xid;
3000         int rc;
3001         struct cifs_tcon *tcon;
3002         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3003         struct cifs_fid fid;
3004         struct cifs_open_parms oparms;
3005         __le16 *utf16_path;
3006
3007         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3008         if (IS_ERR(tlink))
3009                 return ERR_CAST(tlink);
3010
3011         tcon = tlink_tcon(tlink);
3012         xid = get_xid();
3013
3014         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3015         if (!utf16_path) {
3016                 rc = -ENOMEM;
3017                 free_xid(xid);
3018                 return ERR_PTR(rc);
3019         }
3020
3021         oparms.tcon = tcon;
3022         oparms.desired_access = READ_CONTROL;
3023         oparms.disposition = FILE_OPEN;
3024         oparms.create_options = cifs_create_options(cifs_sb, 0);
3025         oparms.fid = &fid;
3026         oparms.reconnect = false;
3027
3028         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
3029         kfree(utf16_path);
3030         if (!rc) {
3031                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3032                             fid.volatile_fid, (void **)&pntsd, pacllen);
3033                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3034         }
3035
3036         cifs_put_tlink(tlink);
3037         free_xid(xid);
3038
3039         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3040         if (rc)
3041                 return ERR_PTR(rc);
3042         return pntsd;
3043 }
3044
3045 static int
3046 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3047                 struct inode *inode, const char *path, int aclflag)
3048 {
3049         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3050         unsigned int xid;
3051         int rc, access_flags = 0;
3052         struct cifs_tcon *tcon;
3053         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3054         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3055         struct cifs_fid fid;
3056         struct cifs_open_parms oparms;
3057         __le16 *utf16_path;
3058
3059         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3060         if (IS_ERR(tlink))
3061                 return PTR_ERR(tlink);
3062
3063         tcon = tlink_tcon(tlink);
3064         xid = get_xid();
3065
3066         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
3067                 access_flags = WRITE_OWNER;
3068         else
3069                 access_flags = WRITE_DAC;
3070
3071         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3072         if (!utf16_path) {
3073                 rc = -ENOMEM;
3074                 free_xid(xid);
3075                 return rc;
3076         }
3077
3078         oparms.tcon = tcon;
3079         oparms.desired_access = access_flags;
3080         oparms.create_options = cifs_create_options(cifs_sb, 0);
3081         oparms.disposition = FILE_OPEN;
3082         oparms.path = path;
3083         oparms.fid = &fid;
3084         oparms.reconnect = false;
3085
3086         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
3087         kfree(utf16_path);
3088         if (!rc) {
3089                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3090                             fid.volatile_fid, pnntsd, acllen, aclflag);
3091                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3092         }
3093
3094         cifs_put_tlink(tlink);
3095         free_xid(xid);
3096         return rc;
3097 }
3098
3099 /* Retrieve an ACL from the server */
3100 static struct cifs_ntsd *
3101 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3102                                       struct inode *inode, const char *path,
3103                                       u32 *pacllen)
3104 {
3105         struct cifs_ntsd *pntsd = NULL;
3106         struct cifsFileInfo *open_file = NULL;
3107
3108         if (inode)
3109                 open_file = find_readable_file(CIFS_I(inode), true);
3110         if (!open_file)
3111                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
3112
3113         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
3114         cifsFileInfo_put(open_file);
3115         return pntsd;
3116 }
3117
3118 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3119                             loff_t offset, loff_t len, bool keep_size)
3120 {
3121         struct cifs_ses *ses = tcon->ses;
3122         struct inode *inode;
3123         struct cifsInodeInfo *cifsi;
3124         struct cifsFileInfo *cfile = file->private_data;
3125         struct file_zero_data_information fsctl_buf;
3126         long rc;
3127         unsigned int xid;
3128         __le64 eof;
3129
3130         xid = get_xid();
3131
3132         inode = d_inode(cfile->dentry);
3133         cifsi = CIFS_I(inode);
3134
3135         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3136                               ses->Suid, offset, len);
3137
3138
3139         /* if file not oplocked can't be sure whether asking to extend size */
3140         if (!CIFS_CACHE_READ(cifsi))
3141                 if (keep_size == false) {
3142                         rc = -EOPNOTSUPP;
3143                         trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3144                                 tcon->tid, ses->Suid, offset, len, rc);
3145                         free_xid(xid);
3146                         return rc;
3147                 }
3148
3149         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3150
3151         fsctl_buf.FileOffset = cpu_to_le64(offset);
3152         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3153
3154         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3155                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
3156                         (char *)&fsctl_buf,
3157                         sizeof(struct file_zero_data_information),
3158                         0, NULL, NULL);
3159         if (rc)
3160                 goto zero_range_exit;
3161
3162         /*
3163          * do we also need to change the size of the file?
3164          */
3165         if (keep_size == false && i_size_read(inode) < offset + len) {
3166                 eof = cpu_to_le64(offset + len);
3167                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3168                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3169         }
3170
3171  zero_range_exit:
3172         free_xid(xid);
3173         if (rc)
3174                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3175                               ses->Suid, offset, len, rc);
3176         else
3177                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3178                               ses->Suid, offset, len);
3179         return rc;
3180 }
3181
3182 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3183                             loff_t offset, loff_t len)
3184 {
3185         struct inode *inode;
3186         struct cifsFileInfo *cfile = file->private_data;
3187         struct file_zero_data_information fsctl_buf;
3188         long rc;
3189         unsigned int xid;
3190         __u8 set_sparse = 1;
3191
3192         xid = get_xid();
3193
3194         inode = d_inode(cfile->dentry);
3195
3196         /* Need to make file sparse, if not already, before freeing range. */
3197         /* Consider adding equivalent for compressed since it could also work */
3198         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3199                 rc = -EOPNOTSUPP;
3200                 free_xid(xid);
3201                 return rc;
3202         }
3203
3204         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3205
3206         fsctl_buf.FileOffset = cpu_to_le64(offset);
3207         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3208
3209         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3210                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3211                         true /* is_fctl */, (char *)&fsctl_buf,
3212                         sizeof(struct file_zero_data_information),
3213                         CIFSMaxBufSize, NULL, NULL);
3214         free_xid(xid);
3215         return rc;
3216 }
3217
3218 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3219                             loff_t off, loff_t len, bool keep_size)
3220 {
3221         struct inode *inode;
3222         struct cifsInodeInfo *cifsi;
3223         struct cifsFileInfo *cfile = file->private_data;
3224         long rc = -EOPNOTSUPP;
3225         unsigned int xid;
3226         __le64 eof;
3227
3228         xid = get_xid();
3229
3230         inode = d_inode(cfile->dentry);
3231         cifsi = CIFS_I(inode);
3232
3233         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3234                                 tcon->ses->Suid, off, len);
3235         /* if file not oplocked can't be sure whether asking to extend size */
3236         if (!CIFS_CACHE_READ(cifsi))
3237                 if (keep_size == false) {
3238                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3239                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3240                         free_xid(xid);
3241                         return rc;
3242                 }
3243
3244         /*
3245          * Extending the file
3246          */
3247         if ((keep_size == false) && i_size_read(inode) < off + len) {
3248                 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0)
3249                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3250
3251                 eof = cpu_to_le64(off + len);
3252                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3253                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3254                 if (rc == 0) {
3255                         cifsi->server_eof = off + len;
3256                         cifs_setsize(inode, off + len);
3257                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3258                         truncate_setsize(inode, off + len);
3259                 }
3260                 goto out;
3261         }
3262
3263         /*
3264          * Files are non-sparse by default so falloc may be a no-op
3265          * Must check if file sparse. If not sparse, and since we are not
3266          * extending then no need to do anything since file already allocated
3267          */
3268         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3269                 rc = 0;
3270                 goto out;
3271         }
3272
3273         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3274                 /*
3275                  * Check if falloc starts within first few pages of file
3276                  * and ends within a few pages of the end of file to
3277                  * ensure that most of file is being forced to be
3278                  * fallocated now. If so then setting whole file sparse
3279                  * ie potentially making a few extra pages at the beginning
3280                  * or end of the file non-sparse via set_sparse is harmless.
3281                  */
3282                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3283                         rc = -EOPNOTSUPP;
3284                         goto out;
3285                 }
3286         }
3287
3288         smb2_set_sparse(xid, tcon, cfile, inode, false);
3289         rc = 0;
3290
3291 out:
3292         if (rc)
3293                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3294                                 tcon->ses->Suid, off, len, rc);
3295         else
3296                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3297                                 tcon->ses->Suid, off, len);
3298
3299         free_xid(xid);
3300         return rc;
3301 }
3302
3303 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3304 {
3305         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3306         struct cifsInodeInfo *cifsi;
3307         struct inode *inode;
3308         int rc = 0;
3309         struct file_allocated_range_buffer in_data, *out_data = NULL;
3310         u32 out_data_len;
3311         unsigned int xid;
3312
3313         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3314                 return generic_file_llseek(file, offset, whence);
3315
3316         inode = d_inode(cfile->dentry);
3317         cifsi = CIFS_I(inode);
3318
3319         if (offset < 0 || offset >= i_size_read(inode))
3320                 return -ENXIO;
3321
3322         xid = get_xid();
3323         /*
3324          * We need to be sure that all dirty pages are written as they
3325          * might fill holes on the server.
3326          * Note that we also MUST flush any written pages since at least
3327          * some servers (Windows2016) will not reflect recent writes in
3328          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3329          */
3330         wrcfile = find_writable_file(cifsi, false);
3331         if (wrcfile) {
3332                 filemap_write_and_wait(inode->i_mapping);
3333                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3334                 cifsFileInfo_put(wrcfile);
3335         }
3336
3337         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3338                 if (whence == SEEK_HOLE)
3339                         offset = i_size_read(inode);
3340                 goto lseek_exit;
3341         }
3342
3343         in_data.file_offset = cpu_to_le64(offset);
3344         in_data.length = cpu_to_le64(i_size_read(inode));
3345
3346         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3347                         cfile->fid.volatile_fid,
3348                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3349                         (char *)&in_data, sizeof(in_data),
3350                         sizeof(struct file_allocated_range_buffer),
3351                         (char **)&out_data, &out_data_len);
3352         if (rc == -E2BIG)
3353                 rc = 0;
3354         if (rc)
3355                 goto lseek_exit;
3356
3357         if (whence == SEEK_HOLE && out_data_len == 0)
3358                 goto lseek_exit;
3359
3360         if (whence == SEEK_DATA && out_data_len == 0) {
3361                 rc = -ENXIO;
3362                 goto lseek_exit;
3363         }
3364
3365         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3366                 rc = -EINVAL;
3367                 goto lseek_exit;
3368         }
3369         if (whence == SEEK_DATA) {
3370                 offset = le64_to_cpu(out_data->file_offset);
3371                 goto lseek_exit;
3372         }
3373         if (offset < le64_to_cpu(out_data->file_offset))
3374                 goto lseek_exit;
3375
3376         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3377
3378  lseek_exit:
3379         free_xid(xid);
3380         kfree(out_data);
3381         if (!rc)
3382                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3383         else
3384                 return rc;
3385 }
3386
3387 static int smb3_fiemap(struct cifs_tcon *tcon,
3388                        struct cifsFileInfo *cfile,
3389                        struct fiemap_extent_info *fei, u64 start, u64 len)
3390 {
3391         unsigned int xid;
3392         struct file_allocated_range_buffer in_data, *out_data;
3393         u32 out_data_len;
3394         int i, num, rc, flags, last_blob;
3395         u64 next;
3396
3397         if (fiemap_check_flags(fei, FIEMAP_FLAG_SYNC))
3398                 return -EBADR;
3399
3400         xid = get_xid();
3401  again:
3402         in_data.file_offset = cpu_to_le64(start);
3403         in_data.length = cpu_to_le64(len);
3404
3405         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3406                         cfile->fid.volatile_fid,
3407                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3408                         (char *)&in_data, sizeof(in_data),
3409                         1024 * sizeof(struct file_allocated_range_buffer),
3410                         (char **)&out_data, &out_data_len);
3411         if (rc == -E2BIG) {
3412                 last_blob = 0;
3413                 rc = 0;
3414         } else
3415                 last_blob = 1;
3416         if (rc)
3417                 goto out;
3418
3419         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3420                 rc = -EINVAL;
3421                 goto out;
3422         }
3423         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3424                 rc = -EINVAL;
3425                 goto out;
3426         }
3427
3428         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3429         for (i = 0; i < num; i++) {
3430                 flags = 0;
3431                 if (i == num - 1 && last_blob)
3432                         flags |= FIEMAP_EXTENT_LAST;
3433
3434                 rc = fiemap_fill_next_extent(fei,
3435                                 le64_to_cpu(out_data[i].file_offset),
3436                                 le64_to_cpu(out_data[i].file_offset),
3437                                 le64_to_cpu(out_data[i].length),
3438                                 flags);
3439                 if (rc < 0)
3440                         goto out;
3441                 if (rc == 1) {
3442                         rc = 0;
3443                         goto out;
3444                 }
3445         }
3446
3447         if (!last_blob) {
3448                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3449                   le64_to_cpu(out_data[num - 1].length);
3450                 len = len - (next - start);
3451                 start = next;
3452                 goto again;
3453         }
3454
3455  out:
3456         free_xid(xid);
3457         kfree(out_data);
3458         return rc;
3459 }
3460
3461 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3462                            loff_t off, loff_t len)
3463 {
3464         /* KEEP_SIZE already checked for by do_fallocate */
3465         if (mode & FALLOC_FL_PUNCH_HOLE)
3466                 return smb3_punch_hole(file, tcon, off, len);
3467         else if (mode & FALLOC_FL_ZERO_RANGE) {
3468                 if (mode & FALLOC_FL_KEEP_SIZE)
3469                         return smb3_zero_range(file, tcon, off, len, true);
3470                 return smb3_zero_range(file, tcon, off, len, false);
3471         } else if (mode == FALLOC_FL_KEEP_SIZE)
3472                 return smb3_simple_falloc(file, tcon, off, len, true);
3473         else if (mode == 0)
3474                 return smb3_simple_falloc(file, tcon, off, len, false);
3475
3476         return -EOPNOTSUPP;
3477 }
3478
3479 static void
3480 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3481                       struct cifsInodeInfo *cinode, __u32 oplock,
3482                       unsigned int epoch, bool *purge_cache)
3483 {
3484         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3485 }
3486
3487 static void
3488 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3489                        unsigned int epoch, bool *purge_cache);
3490
3491 static void
3492 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3493                        struct cifsInodeInfo *cinode, __u32 oplock,
3494                        unsigned int epoch, bool *purge_cache)
3495 {
3496         unsigned int old_state = cinode->oplock;
3497         unsigned int old_epoch = cinode->epoch;
3498         unsigned int new_state;
3499
3500         if (epoch > old_epoch) {
3501                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3502                 cinode->epoch = epoch;
3503         }
3504
3505         new_state = cinode->oplock;
3506         *purge_cache = false;
3507
3508         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3509             (new_state & CIFS_CACHE_READ_FLG) == 0)
3510                 *purge_cache = true;
3511         else if (old_state == new_state && (epoch - old_epoch > 1))
3512                 *purge_cache = true;
3513 }
3514
3515 static void
3516 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3517                       unsigned int epoch, bool *purge_cache)
3518 {
3519         oplock &= 0xFF;
3520         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3521                 return;
3522         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3523                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3524                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3525                          &cinode->vfs_inode);
3526         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3527                 cinode->oplock = CIFS_CACHE_RW_FLG;
3528                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3529                          &cinode->vfs_inode);
3530         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3531                 cinode->oplock = CIFS_CACHE_READ_FLG;
3532                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3533                          &cinode->vfs_inode);
3534         } else
3535                 cinode->oplock = 0;
3536 }
3537
3538 static void
3539 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3540                        unsigned int epoch, bool *purge_cache)
3541 {
3542         char message[5] = {0};
3543         unsigned int new_oplock = 0;
3544
3545         oplock &= 0xFF;
3546         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3547                 return;
3548
3549         /* Check if the server granted an oplock rather than a lease */
3550         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3551                 return smb2_set_oplock_level(cinode, oplock, epoch,
3552                                              purge_cache);
3553
3554         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3555                 new_oplock |= CIFS_CACHE_READ_FLG;
3556                 strcat(message, "R");
3557         }
3558         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3559                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3560                 strcat(message, "H");
3561         }
3562         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3563                 new_oplock |= CIFS_CACHE_WRITE_FLG;
3564                 strcat(message, "W");
3565         }
3566         if (!new_oplock)
3567                 strncpy(message, "None", sizeof(message));
3568
3569         cinode->oplock = new_oplock;
3570         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3571                  &cinode->vfs_inode);
3572 }
3573
3574 static void
3575 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3576                       unsigned int epoch, bool *purge_cache)
3577 {
3578         unsigned int old_oplock = cinode->oplock;
3579
3580         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3581
3582         if (purge_cache) {
3583                 *purge_cache = false;
3584                 if (old_oplock == CIFS_CACHE_READ_FLG) {
3585                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3586                             (epoch - cinode->epoch > 0))
3587                                 *purge_cache = true;
3588                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3589                                  (epoch - cinode->epoch > 1))
3590                                 *purge_cache = true;
3591                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3592                                  (epoch - cinode->epoch > 1))
3593                                 *purge_cache = true;
3594                         else if (cinode->oplock == 0 &&
3595                                  (epoch - cinode->epoch > 0))
3596                                 *purge_cache = true;
3597                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3598                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3599                             (epoch - cinode->epoch > 0))
3600                                 *purge_cache = true;
3601                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3602                                  (epoch - cinode->epoch > 1))
3603                                 *purge_cache = true;
3604                 }
3605                 cinode->epoch = epoch;
3606         }
3607 }
3608
3609 static bool
3610 smb2_is_read_op(__u32 oplock)
3611 {
3612         return oplock == SMB2_OPLOCK_LEVEL_II;
3613 }
3614
3615 static bool
3616 smb21_is_read_op(__u32 oplock)
3617 {
3618         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
3619                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
3620 }
3621
3622 static __le32
3623 map_oplock_to_lease(u8 oplock)
3624 {
3625         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3626                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
3627         else if (oplock == SMB2_OPLOCK_LEVEL_II)
3628                 return SMB2_LEASE_READ_CACHING;
3629         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
3630                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
3631                        SMB2_LEASE_WRITE_CACHING;
3632         return 0;
3633 }
3634
3635 static char *
3636 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
3637 {
3638         struct create_lease *buf;
3639
3640         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
3641         if (!buf)
3642                 return NULL;
3643
3644         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3645         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3646
3647         buf->ccontext.DataOffset = cpu_to_le16(offsetof
3648                                         (struct create_lease, lcontext));
3649         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
3650         buf->ccontext.NameOffset = cpu_to_le16(offsetof
3651                                 (struct create_lease, Name));
3652         buf->ccontext.NameLength = cpu_to_le16(4);
3653         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3654         buf->Name[0] = 'R';
3655         buf->Name[1] = 'q';
3656         buf->Name[2] = 'L';
3657         buf->Name[3] = 's';
3658         return (char *)buf;
3659 }
3660
3661 static char *
3662 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
3663 {
3664         struct create_lease_v2 *buf;
3665
3666         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
3667         if (!buf)
3668                 return NULL;
3669
3670         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3671         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3672
3673         buf->ccontext.DataOffset = cpu_to_le16(offsetof
3674                                         (struct create_lease_v2, lcontext));
3675         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
3676         buf->ccontext.NameOffset = cpu_to_le16(offsetof
3677                                 (struct create_lease_v2, Name));
3678         buf->ccontext.NameLength = cpu_to_le16(4);
3679         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3680         buf->Name[0] = 'R';
3681         buf->Name[1] = 'q';
3682         buf->Name[2] = 'L';
3683         buf->Name[3] = 's';
3684         return (char *)buf;
3685 }
3686
3687 static __u8
3688 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3689 {
3690         struct create_lease *lc = (struct create_lease *)buf;
3691
3692         *epoch = 0; /* not used */
3693         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3694                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3695         return le32_to_cpu(lc->lcontext.LeaseState);
3696 }
3697
3698 static __u8
3699 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3700 {
3701         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
3702
3703         *epoch = le16_to_cpu(lc->lcontext.Epoch);
3704         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3705                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3706         if (lease_key)
3707                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
3708         return le32_to_cpu(lc->lcontext.LeaseState);
3709 }
3710
3711 static unsigned int
3712 smb2_wp_retry_size(struct inode *inode)
3713 {
3714         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
3715                      SMB2_MAX_BUFFER_SIZE);
3716 }
3717
3718 static bool
3719 smb2_dir_needs_close(struct cifsFileInfo *cfile)
3720 {
3721         return !cfile->invalidHandle;
3722 }
3723
3724 static void
3725 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
3726                    struct smb_rqst *old_rq, __le16 cipher_type)
3727 {
3728         struct smb2_sync_hdr *shdr =
3729                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
3730
3731         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
3732         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
3733         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
3734         tr_hdr->Flags = cpu_to_le16(0x01);
3735         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3736                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3737         else
3738                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3739         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
3740 }
3741
3742 /* We can not use the normal sg_set_buf() as we will sometimes pass a
3743  * stack object as buf.
3744  */
3745 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
3746                                    unsigned int buflen)
3747 {
3748         void *addr;
3749         /*
3750          * VMAP_STACK (at least) puts stack into the vmalloc address space
3751          */
3752         if (is_vmalloc_addr(buf))
3753                 addr = vmalloc_to_page(buf);
3754         else
3755                 addr = virt_to_page(buf);
3756         sg_set_page(sg, addr, buflen, offset_in_page(buf));
3757 }
3758
3759 /* Assumes the first rqst has a transform header as the first iov.
3760  * I.e.
3761  * rqst[0].rq_iov[0]  is transform header
3762  * rqst[0].rq_iov[1+] data to be encrypted/decrypted
3763  * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
3764  */
3765 static struct scatterlist *
3766 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
3767 {
3768         unsigned int sg_len;
3769         struct scatterlist *sg;
3770         unsigned int i;
3771         unsigned int j;
3772         unsigned int idx = 0;
3773         int skip;
3774
3775         sg_len = 1;
3776         for (i = 0; i < num_rqst; i++)
3777                 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
3778
3779         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
3780         if (!sg)
3781                 return NULL;
3782
3783         sg_init_table(sg, sg_len);
3784         for (i = 0; i < num_rqst; i++) {
3785                 for (j = 0; j < rqst[i].rq_nvec; j++) {
3786                         /*
3787                          * The first rqst has a transform header where the
3788                          * first 20 bytes are not part of the encrypted blob
3789                          */
3790                         skip = (i == 0) && (j == 0) ? 20 : 0;
3791                         smb2_sg_set_buf(&sg[idx++],
3792                                         rqst[i].rq_iov[j].iov_base + skip,
3793                                         rqst[i].rq_iov[j].iov_len - skip);
3794                         }
3795
3796                 for (j = 0; j < rqst[i].rq_npages; j++) {
3797                         unsigned int len, offset;
3798
3799                         rqst_page_get_length(&rqst[i], j, &len, &offset);
3800                         sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
3801                 }
3802         }
3803         smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
3804         return sg;
3805 }
3806
3807 static int
3808 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
3809 {
3810         struct cifs_ses *ses;
3811         u8 *ses_enc_key;
3812
3813         spin_lock(&cifs_tcp_ses_lock);
3814         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
3815                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3816                         if (ses->Suid == ses_id) {
3817                                 ses_enc_key = enc ? ses->smb3encryptionkey :
3818                                         ses->smb3decryptionkey;
3819                                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
3820                                 spin_unlock(&cifs_tcp_ses_lock);
3821                                 return 0;
3822                         }
3823                 }
3824         }
3825         spin_unlock(&cifs_tcp_ses_lock);
3826
3827         return 1;
3828 }
3829 /*
3830  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
3831  * iov[0]   - transform header (associate data),
3832  * iov[1-N] - SMB2 header and pages - data to encrypt.
3833  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
3834  * untouched.
3835  */
3836 static int
3837 crypt_message(struct TCP_Server_Info *server, int num_rqst,
3838               struct smb_rqst *rqst, int enc)
3839 {
3840         struct smb2_transform_hdr *tr_hdr =
3841                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
3842         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
3843         int rc = 0;
3844         struct scatterlist *sg;
3845         u8 sign[SMB2_SIGNATURE_SIZE] = {};
3846         u8 key[SMB3_SIGN_KEY_SIZE];
3847         struct aead_request *req;
3848         char *iv;
3849         unsigned int iv_len;
3850         DECLARE_CRYPTO_WAIT(wait);
3851         struct crypto_aead *tfm;
3852         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3853
3854         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
3855         if (rc) {
3856                 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
3857                          enc ? "en" : "de");
3858                 return 0;
3859         }
3860
3861         rc = smb3_crypto_aead_allocate(server);
3862         if (rc) {
3863                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
3864                 return rc;
3865         }
3866
3867         tfm = enc ? server->secmech.ccmaesencrypt :
3868                                                 server->secmech.ccmaesdecrypt;
3869         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
3870         if (rc) {
3871                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
3872                 return rc;
3873         }
3874
3875         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
3876         if (rc) {
3877                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
3878                 return rc;
3879         }
3880
3881         req = aead_request_alloc(tfm, GFP_KERNEL);
3882         if (!req) {
3883                 cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
3884                 return -ENOMEM;
3885         }
3886
3887         if (!enc) {
3888                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
3889                 crypt_len += SMB2_SIGNATURE_SIZE;
3890         }
3891
3892         sg = init_sg(num_rqst, rqst, sign);
3893         if (!sg) {
3894                 cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
3895                 rc = -ENOMEM;
3896                 goto free_req;
3897         }
3898
3899         iv_len = crypto_aead_ivsize(tfm);
3900         iv = kzalloc(iv_len, GFP_KERNEL);
3901         if (!iv) {
3902                 cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
3903                 rc = -ENOMEM;
3904                 goto free_sg;
3905         }
3906
3907         if (server->cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3908                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3909         else {
3910                 iv[0] = 3;
3911                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3912         }
3913
3914         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
3915         aead_request_set_ad(req, assoc_data_len);
3916
3917         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
3918                                   crypto_req_done, &wait);
3919
3920         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
3921                                 : crypto_aead_decrypt(req), &wait);
3922
3923         if (!rc && enc)
3924                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
3925
3926         kfree(iv);
3927 free_sg:
3928         kfree(sg);
3929 free_req:
3930         kfree(req);
3931         return rc;
3932 }
3933
3934 void
3935 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
3936 {
3937         int i, j;
3938
3939         for (i = 0; i < num_rqst; i++) {
3940                 if (rqst[i].rq_pages) {
3941                         for (j = rqst[i].rq_npages - 1; j >= 0; j--)
3942                                 put_page(rqst[i].rq_pages[j]);
3943                         kfree(rqst[i].rq_pages);
3944                 }
3945         }
3946 }
3947
3948 /*
3949  * This function will initialize new_rq and encrypt the content.
3950  * The first entry, new_rq[0], only contains a single iov which contains
3951  * a smb2_transform_hdr and is pre-allocated by the caller.
3952  * This function then populates new_rq[1+] with the content from olq_rq[0+].
3953  *
3954  * The end result is an array of smb_rqst structures where the first structure
3955  * only contains a single iov for the transform header which we then can pass
3956  * to crypt_message().
3957  *
3958  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
3959  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
3960  */
3961 static int
3962 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
3963                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
3964 {
3965         struct page **pages;
3966         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
3967         unsigned int npages;
3968         unsigned int orig_len = 0;
3969         int i, j;
3970         int rc = -ENOMEM;
3971
3972         for (i = 1; i < num_rqst; i++) {
3973                 npages = old_rq[i - 1].rq_npages;
3974                 pages = kmalloc_array(npages, sizeof(struct page *),
3975                                       GFP_KERNEL);
3976                 if (!pages)
3977                         goto err_free;
3978
3979                 new_rq[i].rq_pages = pages;
3980                 new_rq[i].rq_npages = npages;
3981                 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
3982                 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
3983                 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
3984                 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
3985                 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
3986
3987                 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
3988
3989                 for (j = 0; j < npages; j++) {
3990                         pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3991                         if (!pages[j])
3992                                 goto err_free;
3993                 }
3994
3995                 /* copy pages form the old */
3996                 for (j = 0; j < npages; j++) {
3997                         char *dst, *src;
3998                         unsigned int offset, len;
3999
4000                         rqst_page_get_length(&new_rq[i], j, &len, &offset);
4001
4002                         dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
4003                         src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
4004
4005                         memcpy(dst, src, len);
4006                         kunmap(new_rq[i].rq_pages[j]);
4007                         kunmap(old_rq[i - 1].rq_pages[j]);
4008                 }
4009         }
4010
4011         /* fill the 1st iov with a transform header */
4012         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4013
4014         rc = crypt_message(server, num_rqst, new_rq, 1);
4015         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4016         if (rc)
4017                 goto err_free;
4018
4019         return rc;
4020
4021 err_free:
4022         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4023         return rc;
4024 }
4025
4026 static int
4027 smb3_is_transform_hdr(void *buf)
4028 {
4029         struct smb2_transform_hdr *trhdr = buf;
4030
4031         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4032 }
4033
4034 static int
4035 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4036                  unsigned int buf_data_size, struct page **pages,
4037                  unsigned int npages, unsigned int page_data_size)
4038 {
4039         struct kvec iov[2];
4040         struct smb_rqst rqst = {NULL};
4041         int rc;
4042
4043         iov[0].iov_base = buf;
4044         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4045         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4046         iov[1].iov_len = buf_data_size;
4047
4048         rqst.rq_iov = iov;
4049         rqst.rq_nvec = 2;
4050         rqst.rq_pages = pages;
4051         rqst.rq_npages = npages;
4052         rqst.rq_pagesz = PAGE_SIZE;
4053         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
4054
4055         rc = crypt_message(server, 1, &rqst, 0);
4056         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4057
4058         if (rc)
4059                 return rc;
4060
4061         memmove(buf, iov[1].iov_base, buf_data_size);
4062
4063         server->total_read = buf_data_size + page_data_size;
4064
4065         return rc;
4066 }
4067
4068 static int
4069 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4070                      unsigned int npages, unsigned int len)
4071 {
4072         int i;
4073         int length;
4074
4075         for (i = 0; i < npages; i++) {
4076                 struct page *page = pages[i];
4077                 size_t n;
4078
4079                 n = len;
4080                 if (len >= PAGE_SIZE) {
4081                         /* enough data to fill the page */
4082                         n = PAGE_SIZE;
4083                         len -= n;
4084                 } else {
4085                         zero_user(page, len, PAGE_SIZE - len);
4086                         len = 0;
4087                 }
4088                 length = cifs_read_page_from_socket(server, page, 0, n);
4089                 if (length < 0)
4090                         return length;
4091                 server->total_read += length;
4092         }
4093
4094         return 0;
4095 }
4096
4097 static int
4098 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4099                unsigned int cur_off, struct bio_vec **page_vec)
4100 {
4101         struct bio_vec *bvec;
4102         int i;
4103
4104         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4105         if (!bvec)
4106                 return -ENOMEM;
4107
4108         for (i = 0; i < npages; i++) {
4109                 bvec[i].bv_page = pages[i];
4110                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4111                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4112                 data_size -= bvec[i].bv_len;
4113         }
4114
4115         if (data_size != 0) {
4116                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4117                 kfree(bvec);
4118                 return -EIO;
4119         }
4120
4121         *page_vec = bvec;
4122         return 0;
4123 }
4124
4125 static int
4126 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4127                  char *buf, unsigned int buf_len, struct page **pages,
4128                  unsigned int npages, unsigned int page_data_size)
4129 {
4130         unsigned int data_offset;
4131         unsigned int data_len;
4132         unsigned int cur_off;
4133         unsigned int cur_page_idx;
4134         unsigned int pad_len;
4135         struct cifs_readdata *rdata = mid->callback_data;
4136         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4137         struct bio_vec *bvec = NULL;
4138         struct iov_iter iter;
4139         struct kvec iov;
4140         int length;
4141         bool use_rdma_mr = false;
4142
4143         if (shdr->Command != SMB2_READ) {
4144                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4145                 return -ENOTSUPP;
4146         }
4147
4148         if (server->ops->is_session_expired &&
4149             server->ops->is_session_expired(buf)) {
4150                 cifs_reconnect(server);
4151                 wake_up(&server->response_q);
4152                 return -1;
4153         }
4154
4155         if (server->ops->is_status_pending &&
4156                         server->ops->is_status_pending(buf, server))
4157                 return -1;
4158
4159         /* set up first two iov to get credits */
4160         rdata->iov[0].iov_base = buf;
4161         rdata->iov[0].iov_len = 0;
4162         rdata->iov[1].iov_base = buf;
4163         rdata->iov[1].iov_len =
4164                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4165         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4166                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4167         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4168                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4169
4170         rdata->result = server->ops->map_error(buf, true);
4171         if (rdata->result != 0) {
4172                 cifs_dbg(FYI, "%s: server returned error %d\n",
4173                          __func__, rdata->result);
4174                 /* normal error on read response */
4175                 dequeue_mid(mid, false);
4176                 return 0;
4177         }
4178
4179         data_offset = server->ops->read_data_offset(buf);
4180 #ifdef CONFIG_CIFS_SMB_DIRECT
4181         use_rdma_mr = rdata->mr;
4182 #endif
4183         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4184
4185         if (data_offset < server->vals->read_rsp_size) {
4186                 /*
4187                  * win2k8 sometimes sends an offset of 0 when the read
4188                  * is beyond the EOF. Treat it as if the data starts just after
4189                  * the header.
4190                  */
4191                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4192                          __func__, data_offset);
4193                 data_offset = server->vals->read_rsp_size;
4194         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4195                 /* data_offset is beyond the end of smallbuf */
4196                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4197                          __func__, data_offset);
4198                 rdata->result = -EIO;
4199                 dequeue_mid(mid, rdata->result);
4200                 return 0;
4201         }
4202
4203         pad_len = data_offset - server->vals->read_rsp_size;
4204
4205         if (buf_len <= data_offset) {
4206                 /* read response payload is in pages */
4207                 cur_page_idx = pad_len / PAGE_SIZE;
4208                 cur_off = pad_len % PAGE_SIZE;
4209
4210                 if (cur_page_idx != 0) {
4211                         /* data offset is beyond the 1st page of response */
4212                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4213                                  __func__, data_offset);
4214                         rdata->result = -EIO;
4215                         dequeue_mid(mid, rdata->result);
4216                         return 0;
4217                 }
4218
4219                 if (data_len > page_data_size - pad_len) {
4220                         /* data_len is corrupt -- discard frame */
4221                         rdata->result = -EIO;
4222                         dequeue_mid(mid, rdata->result);
4223                         return 0;
4224                 }
4225
4226                 rdata->result = init_read_bvec(pages, npages, page_data_size,
4227                                                cur_off, &bvec);
4228                 if (rdata->result != 0) {
4229                         dequeue_mid(mid, rdata->result);
4230                         return 0;
4231                 }
4232
4233                 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4234         } else if (buf_len >= data_offset + data_len) {
4235                 /* read response payload is in buf */
4236                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4237                 iov.iov_base = buf + data_offset;
4238                 iov.iov_len = data_len;
4239                 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4240         } else {
4241                 /* read response payload cannot be in both buf and pages */
4242                 WARN_ONCE(1, "buf can not contain only a part of read data");
4243                 rdata->result = -EIO;
4244                 dequeue_mid(mid, rdata->result);
4245                 return 0;
4246         }
4247
4248         length = rdata->copy_into_pages(server, rdata, &iter);
4249
4250         kfree(bvec);
4251
4252         if (length < 0)
4253                 return length;
4254
4255         dequeue_mid(mid, false);
4256         return length;
4257 }
4258
4259 struct smb2_decrypt_work {
4260         struct work_struct decrypt;
4261         struct TCP_Server_Info *server;
4262         struct page **ppages;
4263         char *buf;
4264         unsigned int npages;
4265         unsigned int len;
4266 };
4267
4268
4269 static void smb2_decrypt_offload(struct work_struct *work)
4270 {
4271         struct smb2_decrypt_work *dw = container_of(work,
4272                                 struct smb2_decrypt_work, decrypt);
4273         int i, rc;
4274         struct mid_q_entry *mid;
4275
4276         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4277                               dw->ppages, dw->npages, dw->len);
4278         if (rc) {
4279                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4280                 goto free_pages;
4281         }
4282
4283         dw->server->lstrp = jiffies;
4284         mid = smb2_find_mid(dw->server, dw->buf);
4285         if (mid == NULL)
4286                 cifs_dbg(FYI, "mid not found\n");
4287         else {
4288                 mid->decrypted = true;
4289                 rc = handle_read_data(dw->server, mid, dw->buf,
4290                                       dw->server->vals->read_rsp_size,
4291                                       dw->ppages, dw->npages, dw->len);
4292                 mid->callback(mid);
4293                 cifs_mid_q_entry_release(mid);
4294         }
4295
4296 free_pages:
4297         for (i = dw->npages-1; i >= 0; i--)
4298                 put_page(dw->ppages[i]);
4299
4300         kfree(dw->ppages);
4301         cifs_small_buf_release(dw->buf);
4302         kfree(dw);
4303 }
4304
4305
4306 static int
4307 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4308                        int *num_mids)
4309 {
4310         char *buf = server->smallbuf;
4311         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4312         unsigned int npages;
4313         struct page **pages;
4314         unsigned int len;
4315         unsigned int buflen = server->pdu_size;
4316         int rc;
4317         int i = 0;
4318         struct smb2_decrypt_work *dw;
4319
4320         *num_mids = 1;
4321         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4322                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4323
4324         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4325         if (rc < 0)
4326                 return rc;
4327         server->total_read += rc;
4328
4329         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4330                 server->vals->read_rsp_size;
4331         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4332
4333         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4334         if (!pages) {
4335                 rc = -ENOMEM;
4336                 goto discard_data;
4337         }
4338
4339         for (; i < npages; i++) {
4340                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4341                 if (!pages[i]) {
4342                         rc = -ENOMEM;
4343                         goto discard_data;
4344                 }
4345         }
4346
4347         /* read read data into pages */
4348         rc = read_data_into_pages(server, pages, npages, len);
4349         if (rc)
4350                 goto free_pages;
4351
4352         rc = cifs_discard_remaining_data(server);
4353         if (rc)
4354                 goto free_pages;
4355
4356         /*
4357          * For large reads, offload to different thread for better performance,
4358          * use more cores decrypting which can be expensive
4359          */
4360
4361         if ((server->min_offload) && (server->in_flight > 1) &&
4362             (server->pdu_size >= server->min_offload)) {
4363                 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4364                 if (dw == NULL)
4365                         goto non_offloaded_decrypt;
4366
4367                 dw->buf = server->smallbuf;
4368                 server->smallbuf = (char *)cifs_small_buf_get();
4369
4370                 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4371
4372                 dw->npages = npages;
4373                 dw->server = server;
4374                 dw->ppages = pages;
4375                 dw->len = len;
4376                 queue_work(decrypt_wq, &dw->decrypt);
4377                 *num_mids = 0; /* worker thread takes care of finding mid */
4378                 return -1;
4379         }
4380
4381 non_offloaded_decrypt:
4382         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4383                               pages, npages, len);
4384         if (rc)
4385                 goto free_pages;
4386
4387         *mid = smb2_find_mid(server, buf);
4388         if (*mid == NULL)
4389                 cifs_dbg(FYI, "mid not found\n");
4390         else {
4391                 cifs_dbg(FYI, "mid found\n");
4392                 (*mid)->decrypted = true;
4393                 rc = handle_read_data(server, *mid, buf,
4394                                       server->vals->read_rsp_size,
4395                                       pages, npages, len);
4396         }
4397
4398 free_pages:
4399         for (i = i - 1; i >= 0; i--)
4400                 put_page(pages[i]);
4401         kfree(pages);
4402         return rc;
4403 discard_data:
4404         cifs_discard_remaining_data(server);
4405         goto free_pages;
4406 }
4407
4408 static int
4409 receive_encrypted_standard(struct TCP_Server_Info *server,
4410                            struct mid_q_entry **mids, char **bufs,
4411                            int *num_mids)
4412 {
4413         int ret, length;
4414         char *buf = server->smallbuf;
4415         struct smb2_sync_hdr *shdr;
4416         unsigned int pdu_length = server->pdu_size;
4417         unsigned int buf_size;
4418         struct mid_q_entry *mid_entry;
4419         int next_is_large;
4420         char *next_buffer = NULL;
4421
4422         *num_mids = 0;
4423
4424         /* switch to large buffer if too big for a small one */
4425         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4426                 server->large_buf = true;
4427                 memcpy(server->bigbuf, buf, server->total_read);
4428                 buf = server->bigbuf;
4429         }
4430
4431         /* now read the rest */
4432         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4433                                 pdu_length - HEADER_SIZE(server) + 1);
4434         if (length < 0)
4435                 return length;
4436         server->total_read += length;
4437
4438         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4439         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
4440         if (length)
4441                 return length;
4442
4443         next_is_large = server->large_buf;
4444 one_more:
4445         shdr = (struct smb2_sync_hdr *)buf;
4446         if (shdr->NextCommand) {
4447                 if (next_is_large)
4448                         next_buffer = (char *)cifs_buf_get();
4449                 else
4450                         next_buffer = (char *)cifs_small_buf_get();
4451                 memcpy(next_buffer,
4452                        buf + le32_to_cpu(shdr->NextCommand),
4453                        pdu_length - le32_to_cpu(shdr->NextCommand));
4454         }
4455
4456         mid_entry = smb2_find_mid(server, buf);
4457         if (mid_entry == NULL)
4458                 cifs_dbg(FYI, "mid not found\n");
4459         else {
4460                 cifs_dbg(FYI, "mid found\n");
4461                 mid_entry->decrypted = true;
4462                 mid_entry->resp_buf_size = server->pdu_size;
4463         }
4464
4465         if (*num_mids >= MAX_COMPOUND) {
4466                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4467                 return -1;
4468         }
4469         bufs[*num_mids] = buf;
4470         mids[(*num_mids)++] = mid_entry;
4471
4472         if (mid_entry && mid_entry->handle)
4473                 ret = mid_entry->handle(server, mid_entry);
4474         else
4475                 ret = cifs_handle_standard(server, mid_entry);
4476
4477         if (ret == 0 && shdr->NextCommand) {
4478                 pdu_length -= le32_to_cpu(shdr->NextCommand);
4479                 server->large_buf = next_is_large;
4480                 if (next_is_large)
4481                         server->bigbuf = buf = next_buffer;
4482                 else
4483                         server->smallbuf = buf = next_buffer;
4484                 goto one_more;
4485         } else if (ret != 0) {
4486                 /*
4487                  * ret != 0 here means that we didn't get to handle_mid() thus
4488                  * server->smallbuf and server->bigbuf are still valid. We need
4489                  * to free next_buffer because it is not going to be used
4490                  * anywhere.
4491                  */
4492                 if (next_is_large)
4493                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4494                 else
4495                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4496         }
4497
4498         return ret;
4499 }
4500
4501 static int
4502 smb3_receive_transform(struct TCP_Server_Info *server,
4503                        struct mid_q_entry **mids, char **bufs, int *num_mids)
4504 {
4505         char *buf = server->smallbuf;
4506         unsigned int pdu_length = server->pdu_size;
4507         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4508         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4509
4510         if (pdu_length < sizeof(struct smb2_transform_hdr) +
4511                                                 sizeof(struct smb2_sync_hdr)) {
4512                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4513                          pdu_length);
4514                 cifs_reconnect(server);
4515                 wake_up(&server->response_q);
4516                 return -ECONNABORTED;
4517         }
4518
4519         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4520                 cifs_server_dbg(VFS, "Transform message is broken\n");
4521                 cifs_reconnect(server);
4522                 wake_up(&server->response_q);
4523                 return -ECONNABORTED;
4524         }
4525
4526         /* TODO: add support for compounds containing READ. */
4527         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4528                 return receive_encrypted_read(server, &mids[0], num_mids);
4529         }
4530
4531         return receive_encrypted_standard(server, mids, bufs, num_mids);
4532 }
4533
4534 int
4535 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4536 {
4537         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4538
4539         return handle_read_data(server, mid, buf, server->pdu_size,
4540                                 NULL, 0, 0);
4541 }
4542
4543 static int
4544 smb2_next_header(char *buf)
4545 {
4546         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
4547         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4548
4549         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
4550                 return sizeof(struct smb2_transform_hdr) +
4551                   le32_to_cpu(t_hdr->OriginalMessageSize);
4552
4553         return le32_to_cpu(hdr->NextCommand);
4554 }
4555
4556 static int
4557 smb2_make_node(unsigned int xid, struct inode *inode,
4558                struct dentry *dentry, struct cifs_tcon *tcon,
4559                char *full_path, umode_t mode, dev_t dev)
4560 {
4561         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
4562         int rc = -EPERM;
4563         FILE_ALL_INFO *buf = NULL;
4564         struct cifs_io_parms io_parms;
4565         __u32 oplock = 0;
4566         struct cifs_fid fid;
4567         struct cifs_open_parms oparms;
4568         unsigned int bytes_written;
4569         struct win_dev *pdev;
4570         struct kvec iov[2];
4571
4572         /*
4573          * Check if mounted with mount parm 'sfu' mount parm.
4574          * SFU emulation should work with all servers, but only
4575          * supports block and char device (no socket & fifo),
4576          * and was used by default in earlier versions of Windows
4577          */
4578         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
4579                 goto out;
4580
4581         /*
4582          * TODO: Add ability to create instead via reparse point. Windows (e.g.
4583          * their current NFS server) uses this approach to expose special files
4584          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
4585          */
4586
4587         if (!S_ISCHR(mode) && !S_ISBLK(mode))
4588                 goto out;
4589
4590         cifs_dbg(FYI, "sfu compat create special file\n");
4591
4592         buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
4593         if (buf == NULL) {
4594                 rc = -ENOMEM;
4595                 goto out;
4596         }
4597
4598         oparms.tcon = tcon;
4599         oparms.cifs_sb = cifs_sb;
4600         oparms.desired_access = GENERIC_WRITE;
4601         oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
4602                                                     CREATE_OPTION_SPECIAL);
4603         oparms.disposition = FILE_CREATE;
4604         oparms.path = full_path;
4605         oparms.fid = &fid;
4606         oparms.reconnect = false;
4607
4608         if (tcon->ses->server->oplocks)
4609                 oplock = REQ_OPLOCK;
4610         else
4611                 oplock = 0;
4612         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
4613         if (rc)
4614                 goto out;
4615
4616         /*
4617          * BB Do not bother to decode buf since no local inode yet to put
4618          * timestamps in, but we can reuse it safely.
4619          */
4620
4621         pdev = (struct win_dev *)buf;
4622         io_parms.pid = current->tgid;
4623         io_parms.tcon = tcon;
4624         io_parms.offset = 0;
4625         io_parms.length = sizeof(struct win_dev);
4626         iov[1].iov_base = buf;
4627         iov[1].iov_len = sizeof(struct win_dev);
4628         if (S_ISCHR(mode)) {
4629                 memcpy(pdev->type, "IntxCHR", 8);
4630                 pdev->major = cpu_to_le64(MAJOR(dev));
4631                 pdev->minor = cpu_to_le64(MINOR(dev));
4632                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4633                                                         &bytes_written, iov, 1);
4634         } else if (S_ISBLK(mode)) {
4635                 memcpy(pdev->type, "IntxBLK", 8);
4636                 pdev->major = cpu_to_le64(MAJOR(dev));
4637                 pdev->minor = cpu_to_le64(MINOR(dev));
4638                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4639                                                         &bytes_written, iov, 1);
4640         }
4641         tcon->ses->server->ops->close(xid, tcon, &fid);
4642         d_drop(dentry);
4643
4644         /* FIXME: add code here to set EAs */
4645 out:
4646         kfree(buf);
4647         return rc;
4648 }
4649
4650
4651 struct smb_version_operations smb20_operations = {
4652         .compare_fids = smb2_compare_fids,
4653         .setup_request = smb2_setup_request,
4654         .setup_async_request = smb2_setup_async_request,
4655         .check_receive = smb2_check_receive,
4656         .add_credits = smb2_add_credits,
4657         .set_credits = smb2_set_credits,
4658         .get_credits_field = smb2_get_credits_field,
4659         .get_credits = smb2_get_credits,
4660         .wait_mtu_credits = cifs_wait_mtu_credits,
4661         .get_next_mid = smb2_get_next_mid,
4662         .revert_current_mid = smb2_revert_current_mid,
4663         .read_data_offset = smb2_read_data_offset,
4664         .read_data_length = smb2_read_data_length,
4665         .map_error = map_smb2_to_linux_error,
4666         .find_mid = smb2_find_mid,
4667         .check_message = smb2_check_message,
4668         .dump_detail = smb2_dump_detail,
4669         .clear_stats = smb2_clear_stats,
4670         .print_stats = smb2_print_stats,
4671         .is_oplock_break = smb2_is_valid_oplock_break,
4672         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4673         .downgrade_oplock = smb2_downgrade_oplock,
4674         .need_neg = smb2_need_neg,
4675         .negotiate = smb2_negotiate,
4676         .negotiate_wsize = smb2_negotiate_wsize,
4677         .negotiate_rsize = smb2_negotiate_rsize,
4678         .sess_setup = SMB2_sess_setup,
4679         .logoff = SMB2_logoff,
4680         .tree_connect = SMB2_tcon,
4681         .tree_disconnect = SMB2_tdis,
4682         .qfs_tcon = smb2_qfs_tcon,
4683         .is_path_accessible = smb2_is_path_accessible,
4684         .can_echo = smb2_can_echo,
4685         .echo = SMB2_echo,
4686         .query_path_info = smb2_query_path_info,
4687         .get_srv_inum = smb2_get_srv_inum,
4688         .query_file_info = smb2_query_file_info,
4689         .set_path_size = smb2_set_path_size,
4690         .set_file_size = smb2_set_file_size,
4691         .set_file_info = smb2_set_file_info,
4692         .set_compression = smb2_set_compression,
4693         .mkdir = smb2_mkdir,
4694         .mkdir_setinfo = smb2_mkdir_setinfo,
4695         .rmdir = smb2_rmdir,
4696         .unlink = smb2_unlink,
4697         .rename = smb2_rename_path,
4698         .create_hardlink = smb2_create_hardlink,
4699         .query_symlink = smb2_query_symlink,
4700         .query_mf_symlink = smb3_query_mf_symlink,
4701         .create_mf_symlink = smb3_create_mf_symlink,
4702         .open = smb2_open_file,
4703         .set_fid = smb2_set_fid,
4704         .close = smb2_close_file,
4705         .flush = smb2_flush_file,
4706         .async_readv = smb2_async_readv,
4707         .async_writev = smb2_async_writev,
4708         .sync_read = smb2_sync_read,
4709         .sync_write = smb2_sync_write,
4710         .query_dir_first = smb2_query_dir_first,
4711         .query_dir_next = smb2_query_dir_next,
4712         .close_dir = smb2_close_dir,
4713         .calc_smb_size = smb2_calc_size,
4714         .is_status_pending = smb2_is_status_pending,
4715         .is_session_expired = smb2_is_session_expired,
4716         .oplock_response = smb2_oplock_response,
4717         .queryfs = smb2_queryfs,
4718         .mand_lock = smb2_mand_lock,
4719         .mand_unlock_range = smb2_unlock_range,
4720         .push_mand_locks = smb2_push_mandatory_locks,
4721         .get_lease_key = smb2_get_lease_key,
4722         .set_lease_key = smb2_set_lease_key,
4723         .new_lease_key = smb2_new_lease_key,
4724         .calc_signature = smb2_calc_signature,
4725         .is_read_op = smb2_is_read_op,
4726         .set_oplock_level = smb2_set_oplock_level,
4727         .create_lease_buf = smb2_create_lease_buf,
4728         .parse_lease_buf = smb2_parse_lease_buf,
4729         .copychunk_range = smb2_copychunk_range,
4730         .wp_retry_size = smb2_wp_retry_size,
4731         .dir_needs_close = smb2_dir_needs_close,
4732         .get_dfs_refer = smb2_get_dfs_refer,
4733         .select_sectype = smb2_select_sectype,
4734 #ifdef CONFIG_CIFS_XATTR
4735         .query_all_EAs = smb2_query_eas,
4736         .set_EA = smb2_set_ea,
4737 #endif /* CIFS_XATTR */
4738         .get_acl = get_smb2_acl,
4739         .get_acl_by_fid = get_smb2_acl_by_fid,
4740         .set_acl = set_smb2_acl,
4741         .next_header = smb2_next_header,
4742         .ioctl_query_info = smb2_ioctl_query_info,
4743         .make_node = smb2_make_node,
4744         .fiemap = smb3_fiemap,
4745         .llseek = smb3_llseek,
4746 };
4747
4748 struct smb_version_operations smb21_operations = {
4749         .compare_fids = smb2_compare_fids,
4750         .setup_request = smb2_setup_request,
4751         .setup_async_request = smb2_setup_async_request,
4752         .check_receive = smb2_check_receive,
4753         .add_credits = smb2_add_credits,
4754         .set_credits = smb2_set_credits,
4755         .get_credits_field = smb2_get_credits_field,
4756         .get_credits = smb2_get_credits,
4757         .wait_mtu_credits = smb2_wait_mtu_credits,
4758         .adjust_credits = smb2_adjust_credits,
4759         .get_next_mid = smb2_get_next_mid,
4760         .revert_current_mid = smb2_revert_current_mid,
4761         .read_data_offset = smb2_read_data_offset,
4762         .read_data_length = smb2_read_data_length,
4763         .map_error = map_smb2_to_linux_error,
4764         .find_mid = smb2_find_mid,
4765         .check_message = smb2_check_message,
4766         .dump_detail = smb2_dump_detail,
4767         .clear_stats = smb2_clear_stats,
4768         .print_stats = smb2_print_stats,
4769         .is_oplock_break = smb2_is_valid_oplock_break,
4770         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4771         .downgrade_oplock = smb2_downgrade_oplock,
4772         .need_neg = smb2_need_neg,
4773         .negotiate = smb2_negotiate,
4774         .negotiate_wsize = smb2_negotiate_wsize,
4775         .negotiate_rsize = smb2_negotiate_rsize,
4776         .sess_setup = SMB2_sess_setup,
4777         .logoff = SMB2_logoff,
4778         .tree_connect = SMB2_tcon,
4779         .tree_disconnect = SMB2_tdis,
4780         .qfs_tcon = smb2_qfs_tcon,
4781         .is_path_accessible = smb2_is_path_accessible,
4782         .can_echo = smb2_can_echo,
4783         .echo = SMB2_echo,
4784         .query_path_info = smb2_query_path_info,
4785         .get_srv_inum = smb2_get_srv_inum,
4786         .query_file_info = smb2_query_file_info,
4787         .set_path_size = smb2_set_path_size,
4788         .set_file_size = smb2_set_file_size,
4789         .set_file_info = smb2_set_file_info,
4790         .set_compression = smb2_set_compression,
4791         .mkdir = smb2_mkdir,
4792         .mkdir_setinfo = smb2_mkdir_setinfo,
4793         .rmdir = smb2_rmdir,
4794         .unlink = smb2_unlink,
4795         .rename = smb2_rename_path,
4796         .create_hardlink = smb2_create_hardlink,
4797         .query_symlink = smb2_query_symlink,
4798         .query_mf_symlink = smb3_query_mf_symlink,
4799         .create_mf_symlink = smb3_create_mf_symlink,
4800         .open = smb2_open_file,
4801         .set_fid = smb2_set_fid,
4802         .close = smb2_close_file,
4803         .flush = smb2_flush_file,
4804         .async_readv = smb2_async_readv,
4805         .async_writev = smb2_async_writev,
4806         .sync_read = smb2_sync_read,
4807         .sync_write = smb2_sync_write,
4808         .query_dir_first = smb2_query_dir_first,
4809         .query_dir_next = smb2_query_dir_next,
4810         .close_dir = smb2_close_dir,
4811         .calc_smb_size = smb2_calc_size,
4812         .is_status_pending = smb2_is_status_pending,
4813         .is_session_expired = smb2_is_session_expired,
4814         .oplock_response = smb2_oplock_response,
4815         .queryfs = smb2_queryfs,
4816         .mand_lock = smb2_mand_lock,
4817         .mand_unlock_range = smb2_unlock_range,
4818         .push_mand_locks = smb2_push_mandatory_locks,
4819         .get_lease_key = smb2_get_lease_key,
4820         .set_lease_key = smb2_set_lease_key,
4821         .new_lease_key = smb2_new_lease_key,
4822         .calc_signature = smb2_calc_signature,
4823         .is_read_op = smb21_is_read_op,
4824         .set_oplock_level = smb21_set_oplock_level,
4825         .create_lease_buf = smb2_create_lease_buf,
4826         .parse_lease_buf = smb2_parse_lease_buf,
4827         .copychunk_range = smb2_copychunk_range,
4828         .wp_retry_size = smb2_wp_retry_size,
4829         .dir_needs_close = smb2_dir_needs_close,
4830         .enum_snapshots = smb3_enum_snapshots,
4831         .notify = smb3_notify,
4832         .get_dfs_refer = smb2_get_dfs_refer,
4833         .select_sectype = smb2_select_sectype,
4834 #ifdef CONFIG_CIFS_XATTR
4835         .query_all_EAs = smb2_query_eas,
4836         .set_EA = smb2_set_ea,
4837 #endif /* CIFS_XATTR */
4838         .get_acl = get_smb2_acl,
4839         .get_acl_by_fid = get_smb2_acl_by_fid,
4840         .set_acl = set_smb2_acl,
4841         .next_header = smb2_next_header,
4842         .ioctl_query_info = smb2_ioctl_query_info,
4843         .make_node = smb2_make_node,
4844         .fiemap = smb3_fiemap,
4845         .llseek = smb3_llseek,
4846 };
4847
4848 struct smb_version_operations smb30_operations = {
4849         .compare_fids = smb2_compare_fids,
4850         .setup_request = smb2_setup_request,
4851         .setup_async_request = smb2_setup_async_request,
4852         .check_receive = smb2_check_receive,
4853         .add_credits = smb2_add_credits,
4854         .set_credits = smb2_set_credits,
4855         .get_credits_field = smb2_get_credits_field,
4856         .get_credits = smb2_get_credits,
4857         .wait_mtu_credits = smb2_wait_mtu_credits,
4858         .adjust_credits = smb2_adjust_credits,
4859         .get_next_mid = smb2_get_next_mid,
4860         .revert_current_mid = smb2_revert_current_mid,
4861         .read_data_offset = smb2_read_data_offset,
4862         .read_data_length = smb2_read_data_length,
4863         .map_error = map_smb2_to_linux_error,
4864         .find_mid = smb2_find_mid,
4865         .check_message = smb2_check_message,
4866         .dump_detail = smb2_dump_detail,
4867         .clear_stats = smb2_clear_stats,
4868         .print_stats = smb2_print_stats,
4869         .dump_share_caps = smb2_dump_share_caps,
4870         .is_oplock_break = smb2_is_valid_oplock_break,
4871         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4872         .downgrade_oplock = smb3_downgrade_oplock,
4873         .need_neg = smb2_need_neg,
4874         .negotiate = smb2_negotiate,
4875         .negotiate_wsize = smb3_negotiate_wsize,
4876         .negotiate_rsize = smb3_negotiate_rsize,
4877         .sess_setup = SMB2_sess_setup,
4878         .logoff = SMB2_logoff,
4879         .tree_connect = SMB2_tcon,
4880         .tree_disconnect = SMB2_tdis,
4881         .qfs_tcon = smb3_qfs_tcon,
4882         .is_path_accessible = smb2_is_path_accessible,
4883         .can_echo = smb2_can_echo,
4884         .echo = SMB2_echo,
4885         .query_path_info = smb2_query_path_info,
4886         .get_srv_inum = smb2_get_srv_inum,
4887         .query_file_info = smb2_query_file_info,
4888         .set_path_size = smb2_set_path_size,
4889         .set_file_size = smb2_set_file_size,
4890         .set_file_info = smb2_set_file_info,
4891         .set_compression = smb2_set_compression,
4892         .mkdir = smb2_mkdir,
4893         .mkdir_setinfo = smb2_mkdir_setinfo,
4894         .rmdir = smb2_rmdir,
4895         .unlink = smb2_unlink,
4896         .rename = smb2_rename_path,
4897         .create_hardlink = smb2_create_hardlink,
4898         .query_symlink = smb2_query_symlink,
4899         .query_mf_symlink = smb3_query_mf_symlink,
4900         .create_mf_symlink = smb3_create_mf_symlink,
4901         .open = smb2_open_file,
4902         .set_fid = smb2_set_fid,
4903         .close = smb2_close_file,
4904         .close_getattr = smb2_close_getattr,
4905         .flush = smb2_flush_file,
4906         .async_readv = smb2_async_readv,
4907         .async_writev = smb2_async_writev,
4908         .sync_read = smb2_sync_read,
4909         .sync_write = smb2_sync_write,
4910         .query_dir_first = smb2_query_dir_first,
4911         .query_dir_next = smb2_query_dir_next,
4912         .close_dir = smb2_close_dir,
4913         .calc_smb_size = smb2_calc_size,
4914         .is_status_pending = smb2_is_status_pending,
4915         .is_session_expired = smb2_is_session_expired,
4916         .oplock_response = smb2_oplock_response,
4917         .queryfs = smb2_queryfs,
4918         .mand_lock = smb2_mand_lock,
4919         .mand_unlock_range = smb2_unlock_range,
4920         .push_mand_locks = smb2_push_mandatory_locks,
4921         .get_lease_key = smb2_get_lease_key,
4922         .set_lease_key = smb2_set_lease_key,
4923         .new_lease_key = smb2_new_lease_key,
4924         .generate_signingkey = generate_smb30signingkey,
4925         .calc_signature = smb3_calc_signature,
4926         .set_integrity  = smb3_set_integrity,
4927         .is_read_op = smb21_is_read_op,
4928         .set_oplock_level = smb3_set_oplock_level,
4929         .create_lease_buf = smb3_create_lease_buf,
4930         .parse_lease_buf = smb3_parse_lease_buf,
4931         .copychunk_range = smb2_copychunk_range,
4932         .duplicate_extents = smb2_duplicate_extents,
4933         .validate_negotiate = smb3_validate_negotiate,
4934         .wp_retry_size = smb2_wp_retry_size,
4935         .dir_needs_close = smb2_dir_needs_close,
4936         .fallocate = smb3_fallocate,
4937         .enum_snapshots = smb3_enum_snapshots,
4938         .notify = smb3_notify,
4939         .init_transform_rq = smb3_init_transform_rq,
4940         .is_transform_hdr = smb3_is_transform_hdr,
4941         .receive_transform = smb3_receive_transform,
4942         .get_dfs_refer = smb2_get_dfs_refer,
4943         .select_sectype = smb2_select_sectype,
4944 #ifdef CONFIG_CIFS_XATTR
4945         .query_all_EAs = smb2_query_eas,
4946         .set_EA = smb2_set_ea,
4947 #endif /* CIFS_XATTR */
4948         .get_acl = get_smb2_acl,
4949         .get_acl_by_fid = get_smb2_acl_by_fid,
4950         .set_acl = set_smb2_acl,
4951         .next_header = smb2_next_header,
4952         .ioctl_query_info = smb2_ioctl_query_info,
4953         .make_node = smb2_make_node,
4954         .fiemap = smb3_fiemap,
4955         .llseek = smb3_llseek,
4956 };
4957
4958 struct smb_version_operations smb311_operations = {
4959         .compare_fids = smb2_compare_fids,
4960         .setup_request = smb2_setup_request,
4961         .setup_async_request = smb2_setup_async_request,
4962         .check_receive = smb2_check_receive,
4963         .add_credits = smb2_add_credits,
4964         .set_credits = smb2_set_credits,
4965         .get_credits_field = smb2_get_credits_field,
4966         .get_credits = smb2_get_credits,
4967         .wait_mtu_credits = smb2_wait_mtu_credits,
4968         .adjust_credits = smb2_adjust_credits,
4969         .get_next_mid = smb2_get_next_mid,
4970         .revert_current_mid = smb2_revert_current_mid,
4971         .read_data_offset = smb2_read_data_offset,
4972         .read_data_length = smb2_read_data_length,
4973         .map_error = map_smb2_to_linux_error,
4974         .find_mid = smb2_find_mid,
4975         .check_message = smb2_check_message,
4976         .dump_detail = smb2_dump_detail,
4977         .clear_stats = smb2_clear_stats,
4978         .print_stats = smb2_print_stats,
4979         .dump_share_caps = smb2_dump_share_caps,
4980         .is_oplock_break = smb2_is_valid_oplock_break,
4981         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4982         .downgrade_oplock = smb3_downgrade_oplock,
4983         .need_neg = smb2_need_neg,
4984         .negotiate = smb2_negotiate,
4985         .negotiate_wsize = smb3_negotiate_wsize,
4986         .negotiate_rsize = smb3_negotiate_rsize,
4987         .sess_setup = SMB2_sess_setup,
4988         .logoff = SMB2_logoff,
4989         .tree_connect = SMB2_tcon,
4990         .tree_disconnect = SMB2_tdis,
4991         .qfs_tcon = smb3_qfs_tcon,
4992         .is_path_accessible = smb2_is_path_accessible,
4993         .can_echo = smb2_can_echo,
4994         .echo = SMB2_echo,
4995         .query_path_info = smb2_query_path_info,
4996         .get_srv_inum = smb2_get_srv_inum,
4997         .query_file_info = smb2_query_file_info,
4998         .set_path_size = smb2_set_path_size,
4999         .set_file_size = smb2_set_file_size,
5000         .set_file_info = smb2_set_file_info,
5001         .set_compression = smb2_set_compression,
5002         .mkdir = smb2_mkdir,
5003         .mkdir_setinfo = smb2_mkdir_setinfo,
5004         .posix_mkdir = smb311_posix_mkdir,
5005         .rmdir = smb2_rmdir,
5006         .unlink = smb2_unlink,
5007         .rename = smb2_rename_path,
5008         .create_hardlink = smb2_create_hardlink,
5009         .query_symlink = smb2_query_symlink,
5010         .query_mf_symlink = smb3_query_mf_symlink,
5011         .create_mf_symlink = smb3_create_mf_symlink,
5012         .open = smb2_open_file,
5013         .set_fid = smb2_set_fid,
5014         .close = smb2_close_file,
5015         .close_getattr = smb2_close_getattr,
5016         .flush = smb2_flush_file,
5017         .async_readv = smb2_async_readv,
5018         .async_writev = smb2_async_writev,
5019         .sync_read = smb2_sync_read,
5020         .sync_write = smb2_sync_write,
5021         .query_dir_first = smb2_query_dir_first,
5022         .query_dir_next = smb2_query_dir_next,
5023         .close_dir = smb2_close_dir,
5024         .calc_smb_size = smb2_calc_size,
5025         .is_status_pending = smb2_is_status_pending,
5026         .is_session_expired = smb2_is_session_expired,
5027         .oplock_response = smb2_oplock_response,
5028         .queryfs = smb311_queryfs,
5029         .mand_lock = smb2_mand_lock,
5030         .mand_unlock_range = smb2_unlock_range,
5031         .push_mand_locks = smb2_push_mandatory_locks,
5032         .get_lease_key = smb2_get_lease_key,
5033         .set_lease_key = smb2_set_lease_key,
5034         .new_lease_key = smb2_new_lease_key,
5035         .generate_signingkey = generate_smb311signingkey,
5036         .calc_signature = smb3_calc_signature,
5037         .set_integrity  = smb3_set_integrity,
5038         .is_read_op = smb21_is_read_op,
5039         .set_oplock_level = smb3_set_oplock_level,
5040         .create_lease_buf = smb3_create_lease_buf,
5041         .parse_lease_buf = smb3_parse_lease_buf,
5042         .copychunk_range = smb2_copychunk_range,
5043         .duplicate_extents = smb2_duplicate_extents,
5044 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5045         .wp_retry_size = smb2_wp_retry_size,
5046         .dir_needs_close = smb2_dir_needs_close,
5047         .fallocate = smb3_fallocate,
5048         .enum_snapshots = smb3_enum_snapshots,
5049         .notify = smb3_notify,
5050         .init_transform_rq = smb3_init_transform_rq,
5051         .is_transform_hdr = smb3_is_transform_hdr,
5052         .receive_transform = smb3_receive_transform,
5053         .get_dfs_refer = smb2_get_dfs_refer,
5054         .select_sectype = smb2_select_sectype,
5055 #ifdef CONFIG_CIFS_XATTR
5056         .query_all_EAs = smb2_query_eas,
5057         .set_EA = smb2_set_ea,
5058 #endif /* CIFS_XATTR */
5059         .get_acl = get_smb2_acl,
5060         .get_acl_by_fid = get_smb2_acl_by_fid,
5061         .set_acl = set_smb2_acl,
5062         .next_header = smb2_next_header,
5063         .ioctl_query_info = smb2_ioctl_query_info,
5064         .make_node = smb2_make_node,
5065         .fiemap = smb3_fiemap,
5066         .llseek = smb3_llseek,
5067 };
5068
5069 struct smb_version_values smb20_values = {
5070         .version_string = SMB20_VERSION_STRING,
5071         .protocol_id = SMB20_PROT_ID,
5072         .req_capabilities = 0, /* MBZ */
5073         .large_lock_type = 0,
5074         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5075         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5076         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5077         .header_size = sizeof(struct smb2_sync_hdr),
5078         .header_preamble_size = 0,
5079         .max_header_size = MAX_SMB2_HDR_SIZE,
5080         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5081         .lock_cmd = SMB2_LOCK,
5082         .cap_unix = 0,
5083         .cap_nt_find = SMB2_NT_FIND,
5084         .cap_large_files = SMB2_LARGE_FILES,
5085         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5086         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5087         .create_lease_size = sizeof(struct create_lease),
5088 };
5089
5090 struct smb_version_values smb21_values = {
5091         .version_string = SMB21_VERSION_STRING,
5092         .protocol_id = SMB21_PROT_ID,
5093         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5094         .large_lock_type = 0,
5095         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5096         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5097         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5098         .header_size = sizeof(struct smb2_sync_hdr),
5099         .header_preamble_size = 0,
5100         .max_header_size = MAX_SMB2_HDR_SIZE,
5101         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5102         .lock_cmd = SMB2_LOCK,
5103         .cap_unix = 0,
5104         .cap_nt_find = SMB2_NT_FIND,
5105         .cap_large_files = SMB2_LARGE_FILES,
5106         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5107         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5108         .create_lease_size = sizeof(struct create_lease),
5109 };
5110
5111 struct smb_version_values smb3any_values = {
5112         .version_string = SMB3ANY_VERSION_STRING,
5113         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5114         .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,
5115         .large_lock_type = 0,
5116         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5117         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5118         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5119         .header_size = sizeof(struct smb2_sync_hdr),
5120         .header_preamble_size = 0,
5121         .max_header_size = MAX_SMB2_HDR_SIZE,
5122         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5123         .lock_cmd = SMB2_LOCK,
5124         .cap_unix = 0,
5125         .cap_nt_find = SMB2_NT_FIND,
5126         .cap_large_files = SMB2_LARGE_FILES,
5127         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5128         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5129         .create_lease_size = sizeof(struct create_lease_v2),
5130 };
5131
5132 struct smb_version_values smbdefault_values = {
5133         .version_string = SMBDEFAULT_VERSION_STRING,
5134         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5135         .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,
5136         .large_lock_type = 0,
5137         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5138         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5139         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5140         .header_size = sizeof(struct smb2_sync_hdr),
5141         .header_preamble_size = 0,
5142         .max_header_size = MAX_SMB2_HDR_SIZE,
5143         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5144         .lock_cmd = SMB2_LOCK,
5145         .cap_unix = 0,
5146         .cap_nt_find = SMB2_NT_FIND,
5147         .cap_large_files = SMB2_LARGE_FILES,
5148         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5149         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5150         .create_lease_size = sizeof(struct create_lease_v2),
5151 };
5152
5153 struct smb_version_values smb30_values = {
5154         .version_string = SMB30_VERSION_STRING,
5155         .protocol_id = SMB30_PROT_ID,
5156         .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,
5157         .large_lock_type = 0,
5158         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5159         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5160         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5161         .header_size = sizeof(struct smb2_sync_hdr),
5162         .header_preamble_size = 0,
5163         .max_header_size = MAX_SMB2_HDR_SIZE,
5164         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5165         .lock_cmd = SMB2_LOCK,
5166         .cap_unix = 0,
5167         .cap_nt_find = SMB2_NT_FIND,
5168         .cap_large_files = SMB2_LARGE_FILES,
5169         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5170         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5171         .create_lease_size = sizeof(struct create_lease_v2),
5172 };
5173
5174 struct smb_version_values smb302_values = {
5175         .version_string = SMB302_VERSION_STRING,
5176         .protocol_id = SMB302_PROT_ID,
5177         .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,
5178         .large_lock_type = 0,
5179         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5180         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5181         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5182         .header_size = sizeof(struct smb2_sync_hdr),
5183         .header_preamble_size = 0,
5184         .max_header_size = MAX_SMB2_HDR_SIZE,
5185         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5186         .lock_cmd = SMB2_LOCK,
5187         .cap_unix = 0,
5188         .cap_nt_find = SMB2_NT_FIND,
5189         .cap_large_files = SMB2_LARGE_FILES,
5190         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5191         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5192         .create_lease_size = sizeof(struct create_lease_v2),
5193 };
5194
5195 struct smb_version_values smb311_values = {
5196         .version_string = SMB311_VERSION_STRING,
5197         .protocol_id = SMB311_PROT_ID,
5198         .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,
5199         .large_lock_type = 0,
5200         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5201         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5202         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5203         .header_size = sizeof(struct smb2_sync_hdr),
5204         .header_preamble_size = 0,
5205         .max_header_size = MAX_SMB2_HDR_SIZE,
5206         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5207         .lock_cmd = SMB2_LOCK,
5208         .cap_unix = 0,
5209         .cap_nt_find = SMB2_NT_FIND,
5210         .cap_large_files = SMB2_LARGE_FILES,
5211         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5212         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5213         .create_lease_size = sizeof(struct create_lease_v2),
5214 };