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