fs/cifs/smb2ops.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  SMB2 version specific operations
   4  *
   5  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   6  */
   7
   8 #include <linux/pagemap.h>
   9 #include <linux/vfs.h>
  10 #include <linux/falloc.h>
  11 #include <linux/scatterlist.h>
  12 #include <linux/uuid.h>
  13 #include <linux/sort.h>
  14 #include <crypto/aead.h>
  15 #include <linux/fiemap.h>
  16 #include "cifsfs.h"
  17 #include "cifsglob.h"
  18 #include "smb2pdu.h"
  19 #include "smb2proto.h"
  20 #include "cifsproto.h"
  21 #include "cifs_debug.h"
  22 #include "cifs_unicode.h"
  23 #include "smb2status.h"
  24 #include "smb2glob.h"
  25 #include "cifs_ioctl.h"
  26 #include "smbdirect.h"
  27
  28 /* Change credits for different ops and return the total number of credits */
  29 static int
  30 change_conf(struct TCP_Server_Info *server)
  31 {
  32         server->credits += server->echo_credits + server->oplock_credits;
  33         server->oplock_credits = server->echo_credits = 0;
  34         switch (server->credits) {
  35         case 0:
  36                 return 0;
  37         case 1:
  38                 server->echoes = false;
  39                 server->oplocks = false;
  40                 break;
  41         case 2:
  42                 server->echoes = true;
  43                 server->oplocks = false;
  44                 server->echo_credits = 1;
  45                 break;
  46         default:
  47                 server->echoes = true;
  48                 if (enable_oplocks) {
  49                         server->oplocks = true;
  50                         server->oplock_credits = 1;
  51                 } else
  52                         server->oplocks = false;
  53
  54                 server->echo_credits = 1;
  55         }
  56         server->credits -= server->echo_credits + server->oplock_credits;
  57         return server->credits + server->echo_credits + server->oplock_credits;
  58 }
  59
  60 static void
  61 smb2_add_credits(struct TCP_Server_Info *server,
  62                  const struct cifs_credits *credits, const int optype)
  63 {
  64         int *val, rc = -1;
  65         unsigned int add = credits->value;
  66         unsigned int instance = credits->instance;
  67         bool reconnect_detected = false;
  68
  69         spin_lock(&server->req_lock);
  70         val = server->ops->get_credits_field(server, optype);
  71
  72         /* eg found case where write overlapping reconnect messed up credits */
  73         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  74                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
  75                         server->hostname, *val, add);
  76         if ((instance == 0) || (instance == server->reconnect_instance))
  77                 *val += add;
  78         else
  79                 reconnect_detected = true;
  80
  81         if (*val > 65000) {
  82                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  83                 pr_warn_once("server overflowed SMB3 credits\n");
  84         }
  85         server->in_flight--;
  86         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  87                 rc = change_conf(server);
  88         /*
  89          * Sometimes server returns 0 credits on oplock break ack - we need to
  90          * rebalance credits in this case.
  91          */
  92         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  93                  server->oplocks) {
  94                 if (server->credits > 1) {
  95                         server->credits--;
  96                         server->oplock_credits++;
  97                 }
  98         }
  99         spin_unlock(&server->req_lock);
 100         wake_up(&server->request_q);
 101
 102         if (reconnect_detected)
 103                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 104                          add, instance);
 105
 106         if (server->tcpStatus == CifsNeedReconnect
 107             || server->tcpStatus == CifsExiting)
 108                 return;
 109
 110         switch (rc) {
 111         case -1:
 112                 /* change_conf hasn't been executed */
 113                 break;
 114         case 0:
 115                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 116                 break;
 117         case 1:
 118                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 119                 break;
 120         case 2:
 121                 cifs_dbg(FYI, "disabling oplocks\n");
 122                 break;
 123         default:
 124                 trace_smb3_add_credits(server->CurrentMid,
 125                         server->hostname, rc, add);
 126                 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
 127         }
 128 }
 129
 130 static void
 131 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 132 {
 133         spin_lock(&server->req_lock);
 134         server->credits = val;
 135         if (val == 1)
 136                 server->reconnect_instance++;
 137         spin_unlock(&server->req_lock);
 138         /* don't log while holding the lock */
 139         if (val == 1)
 140                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 141 }
 142
 143 static int *
 144 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 145 {
 146         switch (optype) {
 147         case CIFS_ECHO_OP:
 148                 return &server->echo_credits;
 149         case CIFS_OBREAK_OP:
 150                 return &server->oplock_credits;
 151         default:
 152                 return &server->credits;
 153         }
 154 }
 155
 156 static unsigned int
 157 smb2_get_credits(struct mid_q_entry *mid)
 158 {
 159         return mid->credits_received;
 160 }
 161
 162 static int
 163 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 164                       unsigned int *num, struct cifs_credits *credits)
 165 {
 166         int rc = 0;
 167         unsigned int scredits;
 168
 169         spin_lock(&server->req_lock);
 170         while (1) {
 171                 if (server->credits <= 0) {
 172                         spin_unlock(&server->req_lock);
 173                         cifs_num_waiters_inc(server);
 174                         rc = wait_event_killable(server->request_q,
 175                                 has_credits(server, &server->credits, 1));
 176                         cifs_num_waiters_dec(server);
 177                         if (rc)
 178                                 return rc;
 179                         spin_lock(&server->req_lock);
 180                 } else {
 181                         if (server->tcpStatus == CifsExiting) {
 182                                 spin_unlock(&server->req_lock);
 183                                 return -ENOENT;
 184                         }
 185
 186                         scredits = server->credits;
 187                         /* can deadlock with reopen */
 188                         if (scredits <= 8) {
 189                                 *num = SMB2_MAX_BUFFER_SIZE;
 190                                 credits->value = 0;
 191                                 credits->instance = 0;
 192                                 break;
 193                         }
 194
 195                         /* leave some credits for reopen and other ops */
 196                         scredits -= 8;
 197                         *num = min_t(unsigned int, size,
 198                                      scredits * SMB2_MAX_BUFFER_SIZE);
 199
 200                         credits->value =
 201                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 202                         credits->instance = server->reconnect_instance;
 203                         server->credits -= credits->value;
 204                         server->in_flight++;
 205                         if (server->in_flight > server->max_in_flight)
 206                                 server->max_in_flight = server->in_flight;
 207                         break;
 208                 }
 209         }
 210         spin_unlock(&server->req_lock);
 211         return rc;
 212 }
 213
 214 static int
 215 smb2_adjust_credits(struct TCP_Server_Info *server,
 216                     struct cifs_credits *credits,
 217                     const unsigned int payload_size)
 218 {
 219         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 220
 221         if (!credits->value || credits->value == new_val)
 222                 return 0;
 223
 224         if (credits->value < new_val) {
 225                 WARN_ONCE(1, "request has less credits (%d) than required (%d)",
 226                           credits->value, new_val);
 227                 return -ENOTSUPP;
 228         }
 229
 230         spin_lock(&server->req_lock);
 231
 232         if (server->reconnect_instance != credits->instance) {
 233                 spin_unlock(&server->req_lock);
 234                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 235                          credits->value - new_val);
 236                 return -EAGAIN;
 237         }
 238
 239         server->credits += credits->value - new_val;
 240         spin_unlock(&server->req_lock);
 241         wake_up(&server->request_q);
 242         credits->value = new_val;
 243         return 0;
 244 }
 245
 246 static __u64
 247 smb2_get_next_mid(struct TCP_Server_Info *server)
 248 {
 249         __u64 mid;
 250         /* for SMB2 we need the current value */
 251         spin_lock(&GlobalMid_Lock);
 252         mid = server->CurrentMid++;
 253         spin_unlock(&GlobalMid_Lock);
 254         return mid;
 255 }
 256
 257 static void
 258 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 259 {
 260         spin_lock(&GlobalMid_Lock);
 261         if (server->CurrentMid >= val)
 262                 server->CurrentMid -= val;
 263         spin_unlock(&GlobalMid_Lock);
 264 }
 265
 266 static struct mid_q_entry *
 267 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 268 {
 269         struct mid_q_entry *mid;
 270         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 271         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 272
 273         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 274                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 275                 return NULL;
 276         }
 277
 278         spin_lock(&GlobalMid_Lock);
 279         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 280                 if ((mid->mid == wire_mid) &&
 281                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 282                     (mid->command == shdr->Command)) {
 283                         kref_get(&mid->refcount);
 284                         if (dequeue) {
 285                                 list_del_init(&mid->qhead);
 286                                 mid->mid_flags |= MID_DELETED;
 287                         }
 288                         spin_unlock(&GlobalMid_Lock);
 289                         return mid;
 290                 }
 291         }
 292         spin_unlock(&GlobalMid_Lock);
 293         return NULL;
 294 }
 295
 296 static struct mid_q_entry *
 297 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 298 {
 299         return __smb2_find_mid(server, buf, false);
 300 }
 301
 302 static struct mid_q_entry *
 303 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
 304 {
 305         return __smb2_find_mid(server, buf, true);
 306 }
 307
 308 static void
 309 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 310 {
 311 #ifdef CONFIG_CIFS_DEBUG2
 312         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 313
 314         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 315                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 316                  shdr->ProcessId);
 317         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 318                  server->ops->calc_smb_size(buf, server));
 319 #endif
 320 }
 321
 322 static bool
 323 smb2_need_neg(struct TCP_Server_Info *server)
 324 {
 325         return server->max_read == 0;
 326 }
 327
 328 static int
 329 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 330 {
 331         int rc;
 332
 333         cifs_ses_server(ses)->CurrentMid = 0;
 334         rc = SMB2_negotiate(xid, ses);
 335         /* BB we probably don't need to retry with modern servers */
 336         if (rc == -EAGAIN)
 337                 rc = -EHOSTDOWN;
 338         return rc;
 339 }
 340
 341 static unsigned int
 342 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 343 {
 344         struct TCP_Server_Info *server = tcon->ses->server;
 345         unsigned int wsize;
 346
 347         /* start with specified wsize, or default */
 348         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 349         wsize = min_t(unsigned int, wsize, server->max_write);
 350         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 351                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 352
 353         return wsize;
 354 }
 355
 356 static unsigned int
 357 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 358 {
 359         struct TCP_Server_Info *server = tcon->ses->server;
 360         unsigned int wsize;
 361
 362         /* start with specified wsize, or default */
 363         wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
 364         wsize = min_t(unsigned int, wsize, server->max_write);
 365 #ifdef CONFIG_CIFS_SMB_DIRECT
 366         if (server->rdma) {
 367                 if (server->sign)
 368                         /*
 369                          * Account for SMB2 data transfer packet header and
 370                          * possible encryption header
 371                          */
 372                         wsize = min_t(unsigned int,
 373                                 wsize,
 374                                 server->smbd_conn->max_fragmented_send_size -
 375                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 376                                         sizeof(struct smb2_transform_hdr));
 377                 else
 378                         wsize = min_t(unsigned int,
 379                                 wsize, server->smbd_conn->max_readwrite_size);
 380         }
 381 #endif
 382         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 383                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 384
 385         return wsize;
 386 }
 387
 388 static unsigned int
 389 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 390 {
 391         struct TCP_Server_Info *server = tcon->ses->server;
 392         unsigned int rsize;
 393
 394         /* start with specified rsize, or default */
 395         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 396         rsize = min_t(unsigned int, rsize, server->max_read);
 397
 398         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 399                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 400
 401         return rsize;
 402 }
 403
 404 static unsigned int
 405 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 406 {
 407         struct TCP_Server_Info *server = tcon->ses->server;
 408         unsigned int rsize;
 409
 410         /* start with specified rsize, or default */
 411         rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
 412         rsize = min_t(unsigned int, rsize, server->max_read);
 413 #ifdef CONFIG_CIFS_SMB_DIRECT
 414         if (server->rdma) {
 415                 if (server->sign)
 416                         /*
 417                          * Account for SMB2 data transfer packet header and
 418                          * possible encryption header
 419                          */
 420                         rsize = min_t(unsigned int,
 421                                 rsize,
 422                                 server->smbd_conn->max_fragmented_recv_size -
 423                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 424                                         sizeof(struct smb2_transform_hdr));
 425                 else
 426                         rsize = min_t(unsigned int,
 427                                 rsize, server->smbd_conn->max_readwrite_size);
 428         }
 429 #endif
 430
 431         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 432                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 433
 434         return rsize;
 435 }
 436
 437 static int
 438 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 439                         size_t buf_len,
 440                         struct cifs_server_iface **iface_list,
 441                         size_t *iface_count)
 442 {
 443         struct network_interface_info_ioctl_rsp *p;
 444         struct sockaddr_in *addr4;
 445         struct sockaddr_in6 *addr6;
 446         struct iface_info_ipv4 *p4;
 447         struct iface_info_ipv6 *p6;
 448         struct cifs_server_iface *info;
 449         ssize_t bytes_left;
 450         size_t next = 0;
 451         int nb_iface = 0;
 452         int rc = 0;
 453
 454         *iface_list = NULL;
 455         *iface_count = 0;
 456
 457         /*
 458          * Fist pass: count and sanity check
 459          */
 460
 461         bytes_left = buf_len;
 462         p = buf;
 463         while (bytes_left >= sizeof(*p)) {
 464                 nb_iface++;
 465                 next = le32_to_cpu(p->Next);
 466                 if (!next) {
 467                         bytes_left -= sizeof(*p);
 468                         break;
 469                 }
 470                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 471                 bytes_left -= next;
 472         }
 473
 474         if (!nb_iface) {
 475                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 476                 rc = -EINVAL;
 477                 goto out;
 478         }
 479
 480         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 481         if ((bytes_left > 8) || p->Next)
 482                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 483
 484
 485         /*
 486          * Second pass: extract info to internal structure
 487          */
 488
 489         *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
 490         if (!*iface_list) {
 491                 rc = -ENOMEM;
 492                 goto out;
 493         }
 494
 495         info = *iface_list;
 496         bytes_left = buf_len;
 497         p = buf;
 498         while (bytes_left >= sizeof(*p)) {
 499                 info->speed = le64_to_cpu(p->LinkSpeed);
 500                 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 501                 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 502
 503                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 504                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 505                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 506                          le32_to_cpu(p->Capability));
 507
 508                 switch (p->Family) {
 509                 /*
 510                  * The kernel and wire socket structures have the same
 511                  * layout and use network byte order but make the
 512                  * conversion explicit in case either one changes.
 513                  */
 514                 case INTERNETWORK:
 515                         addr4 = (struct sockaddr_in *)&info->sockaddr;
 516                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 517                         addr4->sin_family = AF_INET;
 518                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 519
 520                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 521                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 522
 523                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 524                                  &addr4->sin_addr);
 525                         break;
 526                 case INTERNETWORKV6:
 527                         addr6 = (struct sockaddr_in6 *)&info->sockaddr;
 528                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 529                         addr6->sin6_family = AF_INET6;
 530                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 531
 532                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 533                         addr6->sin6_flowinfo = 0;
 534                         addr6->sin6_scope_id = 0;
 535                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 536
 537                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 538                                  &addr6->sin6_addr);
 539                         break;
 540                 default:
 541                         cifs_dbg(VFS,
 542                                  "%s: skipping unsupported socket family\n",
 543                                  __func__);
 544                         goto next_iface;
 545                 }
 546
 547                 (*iface_count)++;
 548                 info++;
 549 next_iface:
 550                 next = le32_to_cpu(p->Next);
 551                 if (!next)
 552                         break;
 553                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 554                 bytes_left -= next;
 555         }
 556
 557         if (!*iface_count) {
 558                 rc = -EINVAL;
 559                 goto out;
 560         }
 561
 562 out:
 563         if (rc) {
 564                 kfree(*iface_list);
 565                 *iface_count = 0;
 566                 *iface_list = NULL;
 567         }
 568         return rc;
 569 }
 570
 571 static int compare_iface(const void *ia, const void *ib)
 572 {
 573         const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
 574         const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
 575
 576         return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
 577 }
 578
 579 static int
 580 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 581 {
 582         int rc;
 583         unsigned int ret_data_len = 0;
 584         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 585         struct cifs_server_iface *iface_list;
 586         size_t iface_count;
 587         struct cifs_ses *ses = tcon->ses;
 588
 589         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 590                         FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 591                         NULL /* no data input */, 0 /* no data input */,
 592                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 593         if (rc == -EOPNOTSUPP) {
 594                 cifs_dbg(FYI,
 595                          "server does not support query network interfaces\n");
 596                 goto out;
 597         } else if (rc != 0) {
 598                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 599                 goto out;
 600         }
 601
 602         rc = parse_server_interfaces(out_buf, ret_data_len,
 603                                      &iface_list, &iface_count);
 604         if (rc)
 605                 goto out;
 606
 607         /* sort interfaces from fastest to slowest */
 608         sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
 609
 610         spin_lock(&ses->iface_lock);
 611         kfree(ses->iface_list);
 612         ses->iface_list = iface_list;
 613         ses->iface_count = iface_count;
 614         ses->iface_last_update = jiffies;
 615         spin_unlock(&ses->iface_lock);
 616
 617 out:
 618         kfree(out_buf);
 619         return rc;
 620 }
 621
 622 static void
 623 smb2_close_cached_fid(struct kref *ref)
 624 {
 625         struct cached_fid *cfid = container_of(ref, struct cached_fid,
 626                                                refcount);
 627
 628         if (cfid->is_valid) {
 629                 cifs_dbg(FYI, "clear cached root file handle\n");
 630                 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 631                            cfid->fid->volatile_fid);
 632                 cfid->is_valid = false;
 633                 cfid->file_all_info_is_valid = false;
 634                 cfid->has_lease = false;
 635         }
 636 }
 637
 638 void close_shroot(struct cached_fid *cfid)
 639 {
 640         mutex_lock(&cfid->fid_mutex);
 641         kref_put(&cfid->refcount, smb2_close_cached_fid);
 642         mutex_unlock(&cfid->fid_mutex);
 643 }
 644
 645 void close_shroot_lease_locked(struct cached_fid *cfid)
 646 {
 647         if (cfid->has_lease) {
 648                 cfid->has_lease = false;
 649                 kref_put(&cfid->refcount, smb2_close_cached_fid);
 650         }
 651 }
 652
 653 void close_shroot_lease(struct cached_fid *cfid)
 654 {
 655         mutex_lock(&cfid->fid_mutex);
 656         close_shroot_lease_locked(cfid);
 657         mutex_unlock(&cfid->fid_mutex);
 658 }
 659
 660 void
 661 smb2_cached_lease_break(struct work_struct *work)
 662 {
 663         struct cached_fid *cfid = container_of(work,
 664                                 struct cached_fid, lease_break);
 665
 666         close_shroot_lease(cfid);
 667 }
 668
 669 /*
 670  * Open the directory at the root of a share
 671  */
 672 int open_shroot(unsigned int xid, struct cifs_tcon *tcon,
 673                 struct cifs_sb_info *cifs_sb,
 674                 struct cached_fid **cfid)
 675 {
 676         struct cifs_ses *ses = tcon->ses;
 677         struct TCP_Server_Info *server = ses->server;
 678         struct cifs_open_parms oparms;
 679         struct smb2_create_rsp *o_rsp = NULL;
 680         struct smb2_query_info_rsp *qi_rsp = NULL;
 681         int resp_buftype[2];
 682         struct smb_rqst rqst[2];
 683         struct kvec rsp_iov[2];
 684         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
 685         struct kvec qi_iov[1];
 686         int rc, flags = 0;
 687         __le16 utf16_path = 0; /* Null - since an open of top of share */
 688         u8 oplock = SMB2_OPLOCK_LEVEL_II;
 689         struct cifs_fid *pfid;
 690
 691         mutex_lock(&tcon->crfid.fid_mutex);
 692         if (tcon->crfid.is_valid) {
 693                 cifs_dbg(FYI, "found a cached root file handle\n");
 694                 *cfid = &tcon->crfid;
 695                 kref_get(&tcon->crfid.refcount);
 696                 mutex_unlock(&tcon->crfid.fid_mutex);
 697                 return 0;
 698         }
 699
 700         /*
 701          * We do not hold the lock for the open because in case
 702          * SMB2_open needs to reconnect, it will end up calling
 703          * cifs_mark_open_files_invalid() which takes the lock again
 704          * thus causing a deadlock
 705          */
 706
 707         mutex_unlock(&tcon->crfid.fid_mutex);
 708
 709         if (smb3_encryption_required(tcon))
 710                 flags |= CIFS_TRANSFORM_REQ;
 711
 712         if (!server->ops->new_lease_key)
 713                 return -EIO;
 714
 715         pfid = tcon->crfid.fid;
 716         server->ops->new_lease_key(pfid);
 717
 718         memset(rqst, 0, sizeof(rqst));
 719         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
 720         memset(rsp_iov, 0, sizeof(rsp_iov));
 721
 722         /* Open */
 723         memset(&open_iov, 0, sizeof(open_iov));
 724         rqst[0].rq_iov = open_iov;
 725         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
 726
 727         oparms.tcon = tcon;
 728         oparms.create_options = cifs_create_options(cifs_sb, 0);
 729         oparms.desired_access = FILE_READ_ATTRIBUTES;
 730         oparms.disposition = FILE_OPEN;
 731         oparms.fid = pfid;
 732         oparms.reconnect = false;
 733
 734         rc = SMB2_open_init(tcon, server,
 735                             &rqst[0], &oplock, &oparms, &utf16_path);
 736         if (rc)
 737                 goto oshr_free;
 738         smb2_set_next_command(tcon, &rqst[0]);
 739
 740         memset(&qi_iov, 0, sizeof(qi_iov));
 741         rqst[1].rq_iov = qi_iov;
 742         rqst[1].rq_nvec = 1;
 743
 744         rc = SMB2_query_info_init(tcon, server,
 745                                   &rqst[1], COMPOUND_FID,
 746                                   COMPOUND_FID, FILE_ALL_INFORMATION,
 747                                   SMB2_O_INFO_FILE, 0,
 748                                   sizeof(struct smb2_file_all_info) +
 749                                   PATH_MAX * 2, 0, NULL);
 750         if (rc)
 751                 goto oshr_free;
 752
 753         smb2_set_related(&rqst[1]);
 754
 755         rc = compound_send_recv(xid, ses, server,
 756                                 flags, 2, rqst,
 757                                 resp_buftype, rsp_iov);
 758         mutex_lock(&tcon->crfid.fid_mutex);
 759
 760         /*
 761          * Now we need to check again as the cached root might have
 762          * been successfully re-opened from a concurrent process
 763          */
 764
 765         if (tcon->crfid.is_valid) {
 766                 /* work was already done */
 767
 768                 /* stash fids for close() later */
 769                 struct cifs_fid fid = {
 770                         .persistent_fid = pfid->persistent_fid,
 771                         .volatile_fid = pfid->volatile_fid,
 772                 };
 773
 774                 /*
 775                  * caller expects this func to set pfid to a valid
 776                  * cached root, so we copy the existing one and get a
 777                  * reference.
 778                  */
 779                 memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
 780                 kref_get(&tcon->crfid.refcount);
 781
 782                 mutex_unlock(&tcon->crfid.fid_mutex);
 783
 784                 if (rc == 0) {
 785                         /* close extra handle outside of crit sec */
 786                         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 787                 }
 788                 rc = 0;
 789                 goto oshr_free;
 790         }
 791
 792         /* Cached root is still invalid, continue normaly */
 793
 794         if (rc) {
 795                 if (rc == -EREMCHG) {
 796                         tcon->need_reconnect = true;
 797                         pr_warn_once("server share %s deleted\n",
 798                                      tcon->treeName);
 799                 }
 800                 goto oshr_exit;
 801         }
 802
 803         atomic_inc(&tcon->num_remote_opens);
 804
 805         o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
 806         oparms.fid->persistent_fid = o_rsp->PersistentFileId;
 807         oparms.fid->volatile_fid = o_rsp->VolatileFileId;
 808 #ifdef CONFIG_CIFS_DEBUG2
 809         oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
 810 #endif /* CIFS_DEBUG2 */
 811
 812         memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
 813         tcon->crfid.tcon = tcon;
 814         tcon->crfid.is_valid = true;
 815         kref_init(&tcon->crfid.refcount);
 816
 817         /* BB TBD check to see if oplock level check can be removed below */
 818         if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
 819                 kref_get(&tcon->crfid.refcount);
 820                 tcon->crfid.has_lease = true;
 821                 smb2_parse_contexts(server, o_rsp,
 822                                 &oparms.fid->epoch,
 823                                     oparms.fid->lease_key, &oplock,
 824                                     NULL, NULL);
 825         } else
 826                 goto oshr_exit;
 827
 828         qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
 829         if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
 830                 goto oshr_exit;
 831         if (!smb2_validate_and_copy_iov(
 832                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 833                                 sizeof(struct smb2_file_all_info),
 834                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 835                                 (char *)&tcon->crfid.file_all_info))
 836                 tcon->crfid.file_all_info_is_valid = true;
 837
 838 oshr_exit:
 839         mutex_unlock(&tcon->crfid.fid_mutex);
 840 oshr_free:
 841         SMB2_open_free(&rqst[0]);
 842         SMB2_query_info_free(&rqst[1]);
 843         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 844         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 845         if (rc == 0)
 846                 *cfid = &tcon->crfid;
 847         return rc;
 848 }
 849
 850 static void
 851 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 852               struct cifs_sb_info *cifs_sb)
 853 {
 854         int rc;
 855         __le16 srch_path = 0; /* Null - open root of share */
 856         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 857         struct cifs_open_parms oparms;
 858         struct cifs_fid fid;
 859         bool no_cached_open = tcon->nohandlecache;
 860         struct cached_fid *cfid = NULL;
 861
 862         oparms.tcon = tcon;
 863         oparms.desired_access = FILE_READ_ATTRIBUTES;
 864         oparms.disposition = FILE_OPEN;
 865         oparms.create_options = cifs_create_options(cifs_sb, 0);
 866         oparms.fid = &fid;
 867         oparms.reconnect = false;
 868
 869         if (no_cached_open) {
 870                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 871                                NULL, NULL);
 872         } else {
 873                 rc = open_shroot(xid, tcon, cifs_sb, &cfid);
 874                 if (rc == 0)
 875                         memcpy(&fid, cfid->fid, sizeof(struct cifs_fid));
 876         }
 877         if (rc)
 878                 return;
 879
 880         SMB3_request_interfaces(xid, tcon);
 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_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 887                         FS_VOLUME_INFORMATION);
 888         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 889                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 890         if (no_cached_open)
 891                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 892         else
 893                 close_shroot(cfid);
 894 }
 895
 896 static void
 897 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 898               struct cifs_sb_info *cifs_sb)
 899 {
 900         int rc;
 901         __le16 srch_path = 0; /* Null - open root of share */
 902         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 903         struct cifs_open_parms oparms;
 904         struct cifs_fid fid;
 905
 906         oparms.tcon = tcon;
 907         oparms.desired_access = FILE_READ_ATTRIBUTES;
 908         oparms.disposition = FILE_OPEN;
 909         oparms.create_options = cifs_create_options(cifs_sb, 0);
 910         oparms.fid = &fid;
 911         oparms.reconnect = false;
 912
 913         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 914                        NULL, NULL);
 915         if (rc)
 916                 return;
 917
 918         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 919                         FS_ATTRIBUTE_INFORMATION);
 920         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 921                         FS_DEVICE_INFORMATION);
 922         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 923 }
 924
 925 static int
 926 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 927                         struct cifs_sb_info *cifs_sb, const char *full_path)
 928 {
 929         int rc;
 930         __le16 *utf16_path;
 931         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 932         struct cifs_open_parms oparms;
 933         struct cifs_fid fid;
 934
 935         if ((*full_path == 0) && tcon->crfid.is_valid)
 936                 return 0;
 937
 938         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 939         if (!utf16_path)
 940                 return -ENOMEM;
 941
 942         oparms.tcon = tcon;
 943         oparms.desired_access = FILE_READ_ATTRIBUTES;
 944         oparms.disposition = FILE_OPEN;
 945         oparms.create_options = cifs_create_options(cifs_sb, 0);
 946         oparms.fid = &fid;
 947         oparms.reconnect = false;
 948
 949         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
 950                        NULL);
 951         if (rc) {
 952                 kfree(utf16_path);
 953                 return rc;
 954         }
 955
 956         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 957         kfree(utf16_path);
 958         return rc;
 959 }
 960
 961 static int
 962 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 963                   struct cifs_sb_info *cifs_sb, const char *full_path,
 964                   u64 *uniqueid, FILE_ALL_INFO *data)
 965 {
 966         *uniqueid = le64_to_cpu(data->IndexNumber);
 967         return 0;
 968 }
 969
 970 static int
 971 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 972                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 973 {
 974         int rc;
 975         struct smb2_file_all_info *smb2_data;
 976
 977         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 978                             GFP_KERNEL);
 979         if (smb2_data == NULL)
 980                 return -ENOMEM;
 981
 982         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 983                              smb2_data);
 984         if (!rc)
 985                 move_smb2_info_to_cifs(data, smb2_data);
 986         kfree(smb2_data);
 987         return rc;
 988 }
 989
 990 #ifdef CONFIG_CIFS_XATTR
 991 static ssize_t
 992 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 993                      struct smb2_file_full_ea_info *src, size_t src_size,
 994                      const unsigned char *ea_name)
 995 {
 996         int rc = 0;
 997         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 998         char *name, *value;
 999         size_t buf_size = dst_size;
1000         size_t name_len, value_len, user_name_len;
1001
1002         while (src_size > 0) {
1003                 name_len = (size_t)src->ea_name_length;
1004                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
1005
1006                 if (name_len == 0)
1007                         break;
1008
1009                 if (src_size < 8 + name_len + 1 + value_len) {
1010                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
1011                         rc = -EIO;
1012                         goto out;
1013                 }
1014
1015                 name = &src->ea_data[0];
1016                 value = &src->ea_data[src->ea_name_length + 1];
1017
1018                 if (ea_name) {
1019                         if (ea_name_len == name_len &&
1020                             memcmp(ea_name, name, name_len) == 0) {
1021                                 rc = value_len;
1022                                 if (dst_size == 0)
1023                                         goto out;
1024                                 if (dst_size < value_len) {
1025                                         rc = -ERANGE;
1026                                         goto out;
1027                                 }
1028                                 memcpy(dst, value, value_len);
1029                                 goto out;
1030                         }
1031                 } else {
1032                         /* 'user.' plus a terminating null */
1033                         user_name_len = 5 + 1 + name_len;
1034
1035                         if (buf_size == 0) {
1036                                 /* skip copy - calc size only */
1037                                 rc += user_name_len;
1038                         } else if (dst_size >= user_name_len) {
1039                                 dst_size -= user_name_len;
1040                                 memcpy(dst, "user.", 5);
1041                                 dst += 5;
1042                                 memcpy(dst, src->ea_data, name_len);
1043                                 dst += name_len;
1044                                 *dst = 0;
1045                                 ++dst;
1046                                 rc += user_name_len;
1047                         } else {
1048                                 /* stop before overrun buffer */
1049                                 rc = -ERANGE;
1050                                 break;
1051                         }
1052                 }
1053
1054                 if (!src->next_entry_offset)
1055                         break;
1056
1057                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1058                         /* stop before overrun buffer */
1059                         rc = -ERANGE;
1060                         break;
1061                 }
1062                 src_size -= le32_to_cpu(src->next_entry_offset);
1063                 src = (void *)((char *)src +
1064                                le32_to_cpu(src->next_entry_offset));
1065         }
1066
1067         /* didn't find the named attribute */
1068         if (ea_name)
1069                 rc = -ENODATA;
1070
1071 out:
1072         return (ssize_t)rc;
1073 }
1074
1075 static ssize_t
1076 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1077                const unsigned char *path, const unsigned char *ea_name,
1078                char *ea_data, size_t buf_size,
1079                struct cifs_sb_info *cifs_sb)
1080 {
1081         int rc;
1082         __le16 *utf16_path;
1083         struct kvec rsp_iov = {NULL, 0};
1084         int buftype = CIFS_NO_BUFFER;
1085         struct smb2_query_info_rsp *rsp;
1086         struct smb2_file_full_ea_info *info = NULL;
1087
1088         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1089         if (!utf16_path)
1090                 return -ENOMEM;
1091
1092         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1093                                       FILE_READ_EA,
1094                                       FILE_FULL_EA_INFORMATION,
1095                                       SMB2_O_INFO_FILE,
1096                                       CIFSMaxBufSize -
1097                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1098                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1099                                       &rsp_iov, &buftype, cifs_sb);
1100         if (rc) {
1101                 /*
1102                  * If ea_name is NULL (listxattr) and there are no EAs,
1103                  * return 0 as it's not an error. Otherwise, the specified
1104                  * ea_name was not found.
1105                  */
1106                 if (!ea_name && rc == -ENODATA)
1107                         rc = 0;
1108                 goto qeas_exit;
1109         }
1110
1111         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1112         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1113                                le32_to_cpu(rsp->OutputBufferLength),
1114                                &rsp_iov,
1115                                sizeof(struct smb2_file_full_ea_info));
1116         if (rc)
1117                 goto qeas_exit;
1118
1119         info = (struct smb2_file_full_ea_info *)(
1120                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1121         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1122                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1123
1124  qeas_exit:
1125         kfree(utf16_path);
1126         free_rsp_buf(buftype, rsp_iov.iov_base);
1127         return rc;
1128 }
1129
1130
1131 static int
1132 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1133             const char *path, const char *ea_name, const void *ea_value,
1134             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1135             struct cifs_sb_info *cifs_sb)
1136 {
1137         struct cifs_ses *ses = tcon->ses;
1138         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1139         __le16 *utf16_path = NULL;
1140         int ea_name_len = strlen(ea_name);
1141         int flags = CIFS_CP_CREATE_CLOSE_OP;
1142         int len;
1143         struct smb_rqst rqst[3];
1144         int resp_buftype[3];
1145         struct kvec rsp_iov[3];
1146         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1147         struct cifs_open_parms oparms;
1148         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1149         struct cifs_fid fid;
1150         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1151         unsigned int size[1];
1152         void *data[1];
1153         struct smb2_file_full_ea_info *ea = NULL;
1154         struct kvec close_iov[1];
1155         struct smb2_query_info_rsp *rsp;
1156         int rc, used_len = 0;
1157
1158         if (smb3_encryption_required(tcon))
1159                 flags |= CIFS_TRANSFORM_REQ;
1160
1161         if (ea_name_len > 255)
1162                 return -EINVAL;
1163
1164         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1165         if (!utf16_path)
1166                 return -ENOMEM;
1167
1168         memset(rqst, 0, sizeof(rqst));
1169         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1170         memset(rsp_iov, 0, sizeof(rsp_iov));
1171
1172         if (ses->server->ops->query_all_EAs) {
1173                 if (!ea_value) {
1174                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1175                                                              ea_name, NULL, 0,
1176                                                              cifs_sb);
1177                         if (rc == -ENODATA)
1178                                 goto sea_exit;
1179                 } else {
1180                         /* If we are adding a attribute we should first check
1181                          * if there will be enough space available to store
1182                          * the new EA. If not we should not add it since we
1183                          * would not be able to even read the EAs back.
1184                          */
1185                         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1186                                       FILE_READ_EA,
1187                                       FILE_FULL_EA_INFORMATION,
1188                                       SMB2_O_INFO_FILE,
1189                                       CIFSMaxBufSize -
1190                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1191                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1192                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1193                         if (rc == 0) {
1194                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1195                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1196                         }
1197                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1198                         resp_buftype[1] = CIFS_NO_BUFFER;
1199                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1200                         rc = 0;
1201
1202                         /* Use a fudge factor of 256 bytes in case we collide
1203                          * with a different set_EAs command.
1204                          */
1205                         if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1206                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1207                            used_len + ea_name_len + ea_value_len + 1) {
1208                                 rc = -ENOSPC;
1209                                 goto sea_exit;
1210                         }
1211                 }
1212         }
1213
1214         /* Open */
1215         memset(&open_iov, 0, sizeof(open_iov));
1216         rqst[0].rq_iov = open_iov;
1217         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1218
1219         memset(&oparms, 0, sizeof(oparms));
1220         oparms.tcon = tcon;
1221         oparms.desired_access = FILE_WRITE_EA;
1222         oparms.disposition = FILE_OPEN;
1223         oparms.create_options = cifs_create_options(cifs_sb, 0);
1224         oparms.fid = &fid;
1225         oparms.reconnect = false;
1226
1227         rc = SMB2_open_init(tcon, server,
1228                             &rqst[0], &oplock, &oparms, utf16_path);
1229         if (rc)
1230                 goto sea_exit;
1231         smb2_set_next_command(tcon, &rqst[0]);
1232
1233
1234         /* Set Info */
1235         memset(&si_iov, 0, sizeof(si_iov));
1236         rqst[1].rq_iov = si_iov;
1237         rqst[1].rq_nvec = 1;
1238
1239         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1240         ea = kzalloc(len, GFP_KERNEL);
1241         if (ea == NULL) {
1242                 rc = -ENOMEM;
1243                 goto sea_exit;
1244         }
1245
1246         ea->ea_name_length = ea_name_len;
1247         ea->ea_value_length = cpu_to_le16(ea_value_len);
1248         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1249         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1250
1251         size[0] = len;
1252         data[0] = ea;
1253
1254         rc = SMB2_set_info_init(tcon, server,
1255                                 &rqst[1], COMPOUND_FID,
1256                                 COMPOUND_FID, current->tgid,
1257                                 FILE_FULL_EA_INFORMATION,
1258                                 SMB2_O_INFO_FILE, 0, data, size);
1259         smb2_set_next_command(tcon, &rqst[1]);
1260         smb2_set_related(&rqst[1]);
1261
1262
1263         /* Close */
1264         memset(&close_iov, 0, sizeof(close_iov));
1265         rqst[2].rq_iov = close_iov;
1266         rqst[2].rq_nvec = 1;
1267         rc = SMB2_close_init(tcon, server,
1268                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1269         smb2_set_related(&rqst[2]);
1270
1271         rc = compound_send_recv(xid, ses, server,
1272                                 flags, 3, rqst,
1273                                 resp_buftype, rsp_iov);
1274         /* no need to bump num_remote_opens because handle immediately closed */
1275
1276  sea_exit:
1277         kfree(ea);
1278         kfree(utf16_path);
1279         SMB2_open_free(&rqst[0]);
1280         SMB2_set_info_free(&rqst[1]);
1281         SMB2_close_free(&rqst[2]);
1282         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1283         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1284         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1285         return rc;
1286 }
1287 #endif
1288
1289 static bool
1290 smb2_can_echo(struct TCP_Server_Info *server)
1291 {
1292         return server->echoes;
1293 }
1294
1295 static void
1296 smb2_clear_stats(struct cifs_tcon *tcon)
1297 {
1298         int i;
1299
1300         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1301                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1302                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1303         }
1304 }
1305
1306 static void
1307 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1308 {
1309         seq_puts(m, "\n\tShare Capabilities:");
1310         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1311                 seq_puts(m, " DFS,");
1312         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1313                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1314         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1315                 seq_puts(m, " SCALEOUT,");
1316         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1317                 seq_puts(m, " CLUSTER,");
1318         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1319                 seq_puts(m, " ASYMMETRIC,");
1320         if (tcon->capabilities == 0)
1321                 seq_puts(m, " None");
1322         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1323                 seq_puts(m, " Aligned,");
1324         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1325                 seq_puts(m, " Partition Aligned,");
1326         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1327                 seq_puts(m, " SSD,");
1328         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1329                 seq_puts(m, " TRIM-support,");
1330
1331         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1332         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1333         if (tcon->perf_sector_size)
1334                 seq_printf(m, "\tOptimal sector size: 0x%x",
1335                            tcon->perf_sector_size);
1336         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1337 }
1338
1339 static void
1340 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1341 {
1342         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1343         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1344
1345         /*
1346          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1347          *  totals (requests sent) since those SMBs are per-session not per tcon
1348          */
1349         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1350                    (long long)(tcon->bytes_read),
1351                    (long long)(tcon->bytes_written));
1352         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1353                    atomic_read(&tcon->num_local_opens),
1354                    atomic_read(&tcon->num_remote_opens));
1355         seq_printf(m, "\nTreeConnects: %d total %d failed",
1356                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1357                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1358         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1359                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1360                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1361         seq_printf(m, "\nCreates: %d total %d failed",
1362                    atomic_read(&sent[SMB2_CREATE_HE]),
1363                    atomic_read(&failed[SMB2_CREATE_HE]));
1364         seq_printf(m, "\nCloses: %d total %d failed",
1365                    atomic_read(&sent[SMB2_CLOSE_HE]),
1366                    atomic_read(&failed[SMB2_CLOSE_HE]));
1367         seq_printf(m, "\nFlushes: %d total %d failed",
1368                    atomic_read(&sent[SMB2_FLUSH_HE]),
1369                    atomic_read(&failed[SMB2_FLUSH_HE]));
1370         seq_printf(m, "\nReads: %d total %d failed",
1371                    atomic_read(&sent[SMB2_READ_HE]),
1372                    atomic_read(&failed[SMB2_READ_HE]));
1373         seq_printf(m, "\nWrites: %d total %d failed",
1374                    atomic_read(&sent[SMB2_WRITE_HE]),
1375                    atomic_read(&failed[SMB2_WRITE_HE]));
1376         seq_printf(m, "\nLocks: %d total %d failed",
1377                    atomic_read(&sent[SMB2_LOCK_HE]),
1378                    atomic_read(&failed[SMB2_LOCK_HE]));
1379         seq_printf(m, "\nIOCTLs: %d total %d failed",
1380                    atomic_read(&sent[SMB2_IOCTL_HE]),
1381                    atomic_read(&failed[SMB2_IOCTL_HE]));
1382         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1383                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1384                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1385         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1386                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1387                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1388         seq_printf(m, "\nQueryInfos: %d total %d failed",
1389                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1390                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1391         seq_printf(m, "\nSetInfos: %d total %d failed",
1392                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1393                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1394         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1395                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1396                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1397 }
1398
1399 static void
1400 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1401 {
1402         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1403         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1404
1405         cfile->fid.persistent_fid = fid->persistent_fid;
1406         cfile->fid.volatile_fid = fid->volatile_fid;
1407         cfile->fid.access = fid->access;
1408 #ifdef CONFIG_CIFS_DEBUG2
1409         cfile->fid.mid = fid->mid;
1410 #endif /* CIFS_DEBUG2 */
1411         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1412                                       &fid->purge_cache);
1413         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1414         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1415 }
1416
1417 static void
1418 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1419                 struct cifs_fid *fid)
1420 {
1421         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1422 }
1423
1424 static void
1425 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1426                    struct cifsFileInfo *cfile)
1427 {
1428         struct smb2_file_network_open_info file_inf;
1429         struct inode *inode;
1430         int rc;
1431
1432         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1433                    cfile->fid.volatile_fid, &file_inf);
1434         if (rc)
1435                 return;
1436
1437         inode = d_inode(cfile->dentry);
1438
1439         spin_lock(&inode->i_lock);
1440         CIFS_I(inode)->time = jiffies;
1441
1442         /* Creation time should not need to be updated on close */
1443         if (file_inf.LastWriteTime)
1444                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1445         if (file_inf.ChangeTime)
1446                 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1447         if (file_inf.LastAccessTime)
1448                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1449
1450         /*
1451          * i_blocks is not related to (i_size / i_blksize),
1452          * but instead 512 byte (2**9) size is required for
1453          * calculating num blocks.
1454          */
1455         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1456                 inode->i_blocks =
1457                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1458
1459         /* End of file and Attributes should not have to be updated on close */
1460         spin_unlock(&inode->i_lock);
1461 }
1462
1463 static int
1464 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1465                      u64 persistent_fid, u64 volatile_fid,
1466                      struct copychunk_ioctl *pcchunk)
1467 {
1468         int rc;
1469         unsigned int ret_data_len;
1470         struct resume_key_req *res_key;
1471
1472         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1473                         FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1474                         CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1475
1476         if (rc) {
1477                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1478                 goto req_res_key_exit;
1479         }
1480         if (ret_data_len < sizeof(struct resume_key_req)) {
1481                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1482                 rc = -EINVAL;
1483                 goto req_res_key_exit;
1484         }
1485         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1486
1487 req_res_key_exit:
1488         kfree(res_key);
1489         return rc;
1490 }
1491
1492 struct iqi_vars {
1493         struct smb_rqst rqst[3];
1494         struct kvec rsp_iov[3];
1495         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1496         struct kvec qi_iov[1];
1497         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1498         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1499         struct kvec close_iov[1];
1500 };
1501
1502 static int
1503 smb2_ioctl_query_info(const unsigned int xid,
1504                       struct cifs_tcon *tcon,
1505                       struct cifs_sb_info *cifs_sb,
1506                       __le16 *path, int is_dir,
1507                       unsigned long p)
1508 {
1509         struct iqi_vars *vars;
1510         struct smb_rqst *rqst;
1511         struct kvec *rsp_iov;
1512         struct cifs_ses *ses = tcon->ses;
1513         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1514         char __user *arg = (char __user *)p;
1515         struct smb_query_info qi;
1516         struct smb_query_info __user *pqi;
1517         int rc = 0;
1518         int flags = CIFS_CP_CREATE_CLOSE_OP;
1519         struct smb2_query_info_rsp *qi_rsp = NULL;
1520         struct smb2_ioctl_rsp *io_rsp = NULL;
1521         void *buffer = NULL;
1522         int resp_buftype[3];
1523         struct cifs_open_parms oparms;
1524         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1525         struct cifs_fid fid;
1526         unsigned int size[2];
1527         void *data[2];
1528         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1529         void (*free_req1_func)(struct smb_rqst *r);
1530
1531         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1532         if (vars == NULL)
1533                 return -ENOMEM;
1534         rqst = &vars->rqst[0];
1535         rsp_iov = &vars->rsp_iov[0];
1536
1537         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1538
1539         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1540                 rc = -EFAULT;
1541                 goto free_vars;
1542         }
1543         if (qi.output_buffer_length > 1024) {
1544                 rc = -EINVAL;
1545                 goto free_vars;
1546         }
1547
1548         if (!ses || !server) {
1549                 rc = -EIO;
1550                 goto free_vars;
1551         }
1552
1553         if (smb3_encryption_required(tcon))
1554                 flags |= CIFS_TRANSFORM_REQ;
1555
1556         if (qi.output_buffer_length) {
1557                 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1558                 if (IS_ERR(buffer)) {
1559                         rc = PTR_ERR(buffer);
1560                         goto free_vars;
1561                 }
1562         }
1563
1564         /* Open */
1565         rqst[0].rq_iov = &vars->open_iov[0];
1566         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1567
1568         memset(&oparms, 0, sizeof(oparms));
1569         oparms.tcon = tcon;
1570         oparms.disposition = FILE_OPEN;
1571         oparms.create_options = cifs_create_options(cifs_sb, create_options);
1572         oparms.fid = &fid;
1573         oparms.reconnect = false;
1574
1575         if (qi.flags & PASSTHRU_FSCTL) {
1576                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1577                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1578                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1579                         break;
1580                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1581                         oparms.desired_access = GENERIC_ALL;
1582                         break;
1583                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1584                         oparms.desired_access = GENERIC_READ;
1585                         break;
1586                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1587                         oparms.desired_access = GENERIC_WRITE;
1588                         break;
1589                 }
1590         } else if (qi.flags & PASSTHRU_SET_INFO) {
1591                 oparms.desired_access = GENERIC_WRITE;
1592         } else {
1593                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1594         }
1595
1596         rc = SMB2_open_init(tcon, server,
1597                             &rqst[0], &oplock, &oparms, path);
1598         if (rc)
1599                 goto free_output_buffer;
1600         smb2_set_next_command(tcon, &rqst[0]);
1601
1602         /* Query */
1603         if (qi.flags & PASSTHRU_FSCTL) {
1604                 /* Can eventually relax perm check since server enforces too */
1605                 if (!capable(CAP_SYS_ADMIN)) {
1606                         rc = -EPERM;
1607                         goto free_open_req;
1608                 }
1609                 rqst[1].rq_iov = &vars->io_iov[0];
1610                 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1611
1612                 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1613                                      qi.info_type, buffer, qi.output_buffer_length,
1614                                      CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1615                                      MAX_SMB2_CLOSE_RESPONSE_SIZE);
1616                 free_req1_func = SMB2_ioctl_free;
1617         } else if (qi.flags == PASSTHRU_SET_INFO) {
1618                 /* Can eventually relax perm check since server enforces too */
1619                 if (!capable(CAP_SYS_ADMIN)) {
1620                         rc = -EPERM;
1621                         goto free_open_req;
1622                 }
1623                 if (qi.output_buffer_length < 8) {
1624                         rc = -EINVAL;
1625                         goto free_open_req;
1626                 }
1627                 rqst[1].rq_iov = &vars->si_iov[0];
1628                 rqst[1].rq_nvec = 1;
1629
1630                 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1631                 size[0] = 8;
1632                 data[0] = buffer;
1633
1634                 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1635                                         current->tgid, FILE_END_OF_FILE_INFORMATION,
1636                                         SMB2_O_INFO_FILE, 0, data, size);
1637                 free_req1_func = SMB2_set_info_free;
1638         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1639                 rqst[1].rq_iov = &vars->qi_iov[0];
1640                 rqst[1].rq_nvec = 1;
1641
1642                 rc = SMB2_query_info_init(tcon, server,
1643                                   &rqst[1], COMPOUND_FID,
1644                                   COMPOUND_FID, qi.file_info_class,
1645                                   qi.info_type, qi.additional_information,
1646                                   qi.input_buffer_length,
1647                                   qi.output_buffer_length, buffer);
1648                 free_req1_func = SMB2_query_info_free;
1649         } else { /* unknown flags */
1650                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1651                               qi.flags);
1652                 rc = -EINVAL;
1653         }
1654
1655         if (rc)
1656                 goto free_open_req;
1657         smb2_set_next_command(tcon, &rqst[1]);
1658         smb2_set_related(&rqst[1]);
1659
1660         /* Close */
1661         rqst[2].rq_iov = &vars->close_iov[0];
1662         rqst[2].rq_nvec = 1;
1663
1664         rc = SMB2_close_init(tcon, server,
1665                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1666         if (rc)
1667                 goto free_req_1;
1668         smb2_set_related(&rqst[2]);
1669
1670         rc = compound_send_recv(xid, ses, server,
1671                                 flags, 3, rqst,
1672                                 resp_buftype, rsp_iov);
1673         if (rc)
1674                 goto out;
1675
1676         /* No need to bump num_remote_opens since handle immediately closed */
1677         if (qi.flags & PASSTHRU_FSCTL) {
1678                 pqi = (struct smb_query_info __user *)arg;
1679                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1680                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1681                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1682                 if (qi.input_buffer_length > 0 &&
1683                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1684                     > rsp_iov[1].iov_len) {
1685                         rc = -EFAULT;
1686                         goto out;
1687                 }
1688
1689                 if (copy_to_user(&pqi->input_buffer_length,
1690                                  &qi.input_buffer_length,
1691                                  sizeof(qi.input_buffer_length))) {
1692                         rc = -EFAULT;
1693                         goto out;
1694                 }
1695
1696                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1697                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1698                                  qi.input_buffer_length))
1699                         rc = -EFAULT;
1700         } else {
1701                 pqi = (struct smb_query_info __user *)arg;
1702                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1703                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1704                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1705                 if (copy_to_user(&pqi->input_buffer_length,
1706                                  &qi.input_buffer_length,
1707                                  sizeof(qi.input_buffer_length))) {
1708                         rc = -EFAULT;
1709                         goto out;
1710                 }
1711
1712                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1713                                  qi.input_buffer_length))
1714                         rc = -EFAULT;
1715         }
1716
1717 out:
1718         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1719         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1720         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1721         SMB2_close_free(&rqst[2]);
1722 free_req_1:
1723         free_req1_func(&rqst[1]);
1724 free_open_req:
1725         SMB2_open_free(&rqst[0]);
1726 free_output_buffer:
1727         kfree(buffer);
1728 free_vars:
1729         kfree(vars);
1730         return rc;
1731 }
1732
1733 static ssize_t
1734 smb2_copychunk_range(const unsigned int xid,
1735                         struct cifsFileInfo *srcfile,
1736                         struct cifsFileInfo *trgtfile, u64 src_off,
1737                         u64 len, u64 dest_off)
1738 {
1739         int rc;
1740         unsigned int ret_data_len;
1741         struct copychunk_ioctl *pcchunk;
1742         struct copychunk_ioctl_rsp *retbuf = NULL;
1743         struct cifs_tcon *tcon;
1744         int chunks_copied = 0;
1745         bool chunk_sizes_updated = false;
1746         ssize_t bytes_written, total_bytes_written = 0;
1747         struct inode *inode;
1748
1749         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1750
1751         /*
1752          * We need to flush all unwritten data before we can send the
1753          * copychunk ioctl to the server.
1754          */
1755         inode = d_inode(trgtfile->dentry);
1756         filemap_write_and_wait(inode->i_mapping);
1757
1758         if (pcchunk == NULL)
1759                 return -ENOMEM;
1760
1761         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1762         /* Request a key from the server to identify the source of the copy */
1763         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1764                                 srcfile->fid.persistent_fid,
1765                                 srcfile->fid.volatile_fid, pcchunk);
1766
1767         /* Note: request_res_key sets res_key null only if rc !=0 */
1768         if (rc)
1769                 goto cchunk_out;
1770
1771         /* For now array only one chunk long, will make more flexible later */
1772         pcchunk->ChunkCount = cpu_to_le32(1);
1773         pcchunk->Reserved = 0;
1774         pcchunk->Reserved2 = 0;
1775
1776         tcon = tlink_tcon(trgtfile->tlink);
1777
1778         while (len > 0) {
1779                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1780                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1781                 pcchunk->Length =
1782                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1783
1784                 /* Request server copy to target from src identified by key */
1785                 kfree(retbuf);
1786                 retbuf = NULL;
1787                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1788                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1789                         (char *)pcchunk, sizeof(struct copychunk_ioctl),
1790                         CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1791                 if (rc == 0) {
1792                         if (ret_data_len !=
1793                                         sizeof(struct copychunk_ioctl_rsp)) {
1794                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1795                                 rc = -EIO;
1796                                 goto cchunk_out;
1797                         }
1798                         if (retbuf->TotalBytesWritten == 0) {
1799                                 cifs_dbg(FYI, "no bytes copied\n");
1800                                 rc = -EIO;
1801                                 goto cchunk_out;
1802                         }
1803                         /*
1804                          * Check if server claimed to write more than we asked
1805                          */
1806                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1807                             le32_to_cpu(pcchunk->Length)) {
1808                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1809                                 rc = -EIO;
1810                                 goto cchunk_out;
1811                         }
1812                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1813                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1814                                 rc = -EIO;
1815                                 goto cchunk_out;
1816                         }
1817                         chunks_copied++;
1818
1819                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1820                         src_off += bytes_written;
1821                         dest_off += bytes_written;
1822                         len -= bytes_written;
1823                         total_bytes_written += bytes_written;
1824
1825                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1826                                 le32_to_cpu(retbuf->ChunksWritten),
1827                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1828                                 bytes_written);
1829                 } else if (rc == -EINVAL) {
1830                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1831                                 goto cchunk_out;
1832
1833                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1834                                 le32_to_cpu(retbuf->ChunksWritten),
1835                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1836                                 le32_to_cpu(retbuf->TotalBytesWritten));
1837
1838                         /*
1839                          * Check if this is the first request using these sizes,
1840                          * (ie check if copy succeed once with original sizes
1841                          * and check if the server gave us different sizes after
1842                          * we already updated max sizes on previous request).
1843                          * if not then why is the server returning an error now
1844                          */
1845                         if ((chunks_copied != 0) || chunk_sizes_updated)
1846                                 goto cchunk_out;
1847
1848                         /* Check that server is not asking us to grow size */
1849                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1850                                         tcon->max_bytes_chunk)
1851                                 tcon->max_bytes_chunk =
1852                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1853                         else
1854                                 goto cchunk_out; /* server gave us bogus size */
1855
1856                         /* No need to change MaxChunks since already set to 1 */
1857                         chunk_sizes_updated = true;
1858                 } else
1859                         goto cchunk_out;
1860         }
1861
1862 cchunk_out:
1863         kfree(pcchunk);
1864         kfree(retbuf);
1865         if (rc)
1866                 return rc;
1867         else
1868                 return total_bytes_written;
1869 }
1870
1871 static int
1872 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1873                 struct cifs_fid *fid)
1874 {
1875         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1876 }
1877
1878 static unsigned int
1879 smb2_read_data_offset(char *buf)
1880 {
1881         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1882
1883         return rsp->DataOffset;
1884 }
1885
1886 static unsigned int
1887 smb2_read_data_length(char *buf, bool in_remaining)
1888 {
1889         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1890
1891         if (in_remaining)
1892                 return le32_to_cpu(rsp->DataRemaining);
1893
1894         return le32_to_cpu(rsp->DataLength);
1895 }
1896
1897
1898 static int
1899 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1900                struct cifs_io_parms *parms, unsigned int *bytes_read,
1901                char **buf, int *buf_type)
1902 {
1903         parms->persistent_fid = pfid->persistent_fid;
1904         parms->volatile_fid = pfid->volatile_fid;
1905         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1906 }
1907
1908 static int
1909 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1910                 struct cifs_io_parms *parms, unsigned int *written,
1911                 struct kvec *iov, unsigned long nr_segs)
1912 {
1913
1914         parms->persistent_fid = pfid->persistent_fid;
1915         parms->volatile_fid = pfid->volatile_fid;
1916         return SMB2_write(xid, parms, written, iov, nr_segs);
1917 }
1918
1919 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1920 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1921                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1922 {
1923         struct cifsInodeInfo *cifsi;
1924         int rc;
1925
1926         cifsi = CIFS_I(inode);
1927
1928         /* if file already sparse don't bother setting sparse again */
1929         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1930                 return true; /* already sparse */
1931
1932         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1933                 return true; /* already not sparse */
1934
1935         /*
1936          * Can't check for sparse support on share the usual way via the
1937          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1938          * since Samba server doesn't set the flag on the share, yet
1939          * supports the set sparse FSCTL and returns sparse correctly
1940          * in the file attributes. If we fail setting sparse though we
1941          * mark that server does not support sparse files for this share
1942          * to avoid repeatedly sending the unsupported fsctl to server
1943          * if the file is repeatedly extended.
1944          */
1945         if (tcon->broken_sparse_sup)
1946                 return false;
1947
1948         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1949                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1950                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1951         if (rc) {
1952                 tcon->broken_sparse_sup = true;
1953                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1954                 return false;
1955         }
1956
1957         if (setsparse)
1958                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1959         else
1960                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1961
1962         return true;
1963 }
1964
1965 static int
1966 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1967                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1968 {
1969         __le64 eof = cpu_to_le64(size);
1970         struct inode *inode;
1971
1972         /*
1973          * If extending file more than one page make sparse. Many Linux fs
1974          * make files sparse by default when extending via ftruncate
1975          */
1976         inode = d_inode(cfile->dentry);
1977
1978         if (!set_alloc && (size > inode->i_size + 8192)) {
1979                 __u8 set_sparse = 1;
1980
1981                 /* whether set sparse succeeds or not, extend the file */
1982                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1983         }
1984
1985         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1986                             cfile->fid.volatile_fid, cfile->pid, &eof);
1987 }
1988
1989 static int
1990 smb2_duplicate_extents(const unsigned int xid,
1991                         struct cifsFileInfo *srcfile,
1992                         struct cifsFileInfo *trgtfile, u64 src_off,
1993                         u64 len, u64 dest_off)
1994 {
1995         int rc;
1996         unsigned int ret_data_len;
1997         struct inode *inode;
1998         struct duplicate_extents_to_file dup_ext_buf;
1999         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
2000
2001         /* server fileays advertise duplicate extent support with this flag */
2002         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
2003              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
2004                 return -EOPNOTSUPP;
2005
2006         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
2007         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
2008         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
2009         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
2010         dup_ext_buf.ByteCount = cpu_to_le64(len);
2011         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
2012                 src_off, dest_off, len);
2013
2014         inode = d_inode(trgtfile->dentry);
2015         if (inode->i_size < dest_off + len) {
2016                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
2017                 if (rc)
2018                         goto duplicate_extents_out;
2019
2020                 /*
2021                  * Although also could set plausible allocation size (i_blocks)
2022                  * here in addition to setting the file size, in reflink
2023                  * it is likely that the target file is sparse. Its allocation
2024                  * size will be queried on next revalidate, but it is important
2025                  * to make sure that file's cached size is updated immediately
2026                  */
2027                 cifs_setsize(inode, dest_off + len);
2028         }
2029         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
2030                         trgtfile->fid.volatile_fid,
2031                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
2032                         (char *)&dup_ext_buf,
2033                         sizeof(struct duplicate_extents_to_file),
2034                         CIFSMaxBufSize, NULL,
2035                         &ret_data_len);
2036
2037         if (ret_data_len > 0)
2038                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2039
2040 duplicate_extents_out:
2041         return rc;
2042 }
2043
2044 static int
2045 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2046                    struct cifsFileInfo *cfile)
2047 {
2048         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2049                             cfile->fid.volatile_fid);
2050 }
2051
2052 static int
2053 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2054                    struct cifsFileInfo *cfile)
2055 {
2056         struct fsctl_set_integrity_information_req integr_info;
2057         unsigned int ret_data_len;
2058
2059         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2060         integr_info.Flags = 0;
2061         integr_info.Reserved = 0;
2062
2063         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2064                         cfile->fid.volatile_fid,
2065                         FSCTL_SET_INTEGRITY_INFORMATION,
2066                         (char *)&integr_info,
2067                         sizeof(struct fsctl_set_integrity_information_req),
2068                         CIFSMaxBufSize, NULL,
2069                         &ret_data_len);
2070
2071 }
2072
2073 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2074 #define GMT_TOKEN_SIZE 50
2075
2076 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2077
2078 /*
2079  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2080  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2081  */
2082 static int
2083 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2084                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2085 {
2086         char *retbuf = NULL;
2087         unsigned int ret_data_len = 0;
2088         int rc;
2089         u32 max_response_size;
2090         struct smb_snapshot_array snapshot_in;
2091
2092         /*
2093          * On the first query to enumerate the list of snapshots available
2094          * for this volume the buffer begins with 0 (number of snapshots
2095          * which can be returned is zero since at that point we do not know
2096          * how big the buffer needs to be). On the second query,
2097          * it (ret_data_len) is set to number of snapshots so we can
2098          * know to set the maximum response size larger (see below).
2099          */
2100         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2101                 return -EFAULT;
2102
2103         /*
2104          * Note that for snapshot queries that servers like Azure expect that
2105          * the first query be minimal size (and just used to get the number/size
2106          * of previous versions) so response size must be specified as EXACTLY
2107          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2108          * of eight bytes.
2109          */
2110         if (ret_data_len == 0)
2111                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2112         else
2113                 max_response_size = CIFSMaxBufSize;
2114
2115         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2116                         cfile->fid.volatile_fid,
2117                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2118                         NULL, 0 /* no input data */, max_response_size,
2119                         (char **)&retbuf,
2120                         &ret_data_len);
2121         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2122                         rc, ret_data_len);
2123         if (rc)
2124                 return rc;
2125
2126         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2127                 /* Fixup buffer */
2128                 if (copy_from_user(&snapshot_in, ioc_buf,
2129                     sizeof(struct smb_snapshot_array))) {
2130                         rc = -EFAULT;
2131                         kfree(retbuf);
2132                         return rc;
2133                 }
2134
2135                 /*
2136                  * Check for min size, ie not large enough to fit even one GMT
2137                  * token (snapshot).  On the first ioctl some users may pass in
2138                  * smaller size (or zero) to simply get the size of the array
2139                  * so the user space caller can allocate sufficient memory
2140                  * and retry the ioctl again with larger array size sufficient
2141                  * to hold all of the snapshot GMT tokens on the second try.
2142                  */
2143                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2144                         ret_data_len = sizeof(struct smb_snapshot_array);
2145
2146                 /*
2147                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2148                  * the snapshot array (of 50 byte GMT tokens) each
2149                  * representing an available previous version of the data
2150                  */
2151                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2152                                         sizeof(struct smb_snapshot_array)))
2153                         ret_data_len = snapshot_in.snapshot_array_size +
2154                                         sizeof(struct smb_snapshot_array);
2155
2156                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2157                         rc = -EFAULT;
2158         }
2159
2160         kfree(retbuf);
2161         return rc;
2162 }
2163
2164
2165
2166 static int
2167 smb3_notify(const unsigned int xid, struct file *pfile,
2168             void __user *ioc_buf)
2169 {
2170         struct smb3_notify notify;
2171         struct dentry *dentry = pfile->f_path.dentry;
2172         struct inode *inode = file_inode(pfile);
2173         struct cifs_sb_info *cifs_sb;
2174         struct cifs_open_parms oparms;
2175         struct cifs_fid fid;
2176         struct cifs_tcon *tcon;
2177         unsigned char *path = NULL;
2178         __le16 *utf16_path = NULL;
2179         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2180         int rc = 0;
2181
2182         path = build_path_from_dentry(dentry);
2183         if (path == NULL)
2184                 return -ENOMEM;
2185
2186         cifs_sb = CIFS_SB(inode->i_sb);
2187
2188         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2189         if (utf16_path == NULL) {
2190                 rc = -ENOMEM;
2191                 goto notify_exit;
2192         }
2193
2194         if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2195                 rc = -EFAULT;
2196                 goto notify_exit;
2197         }
2198
2199         tcon = cifs_sb_master_tcon(cifs_sb);
2200         oparms.tcon = tcon;
2201         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2202         oparms.disposition = FILE_OPEN;
2203         oparms.create_options = cifs_create_options(cifs_sb, 0);
2204         oparms.fid = &fid;
2205         oparms.reconnect = false;
2206
2207         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2208                        NULL);
2209         if (rc)
2210                 goto notify_exit;
2211
2212         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2213                                 notify.watch_tree, notify.completion_filter);
2214
2215         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2216
2217         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2218
2219 notify_exit:
2220         kfree(path);
2221         kfree(utf16_path);
2222         return rc;
2223 }
2224
2225 static int
2226 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2227                      const char *path, struct cifs_sb_info *cifs_sb,
2228                      struct cifs_fid *fid, __u16 search_flags,
2229                      struct cifs_search_info *srch_inf)
2230 {
2231         __le16 *utf16_path;
2232         struct smb_rqst rqst[2];
2233         struct kvec rsp_iov[2];
2234         int resp_buftype[2];
2235         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2236         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2237         int rc, flags = 0;
2238         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2239         struct cifs_open_parms oparms;
2240         struct smb2_query_directory_rsp *qd_rsp = NULL;
2241         struct smb2_create_rsp *op_rsp = NULL;
2242         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2243
2244         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2245         if (!utf16_path)
2246                 return -ENOMEM;
2247
2248         if (smb3_encryption_required(tcon))
2249                 flags |= CIFS_TRANSFORM_REQ;
2250
2251         memset(rqst, 0, sizeof(rqst));
2252         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2253         memset(rsp_iov, 0, sizeof(rsp_iov));
2254
2255         /* Open */
2256         memset(&open_iov, 0, sizeof(open_iov));
2257         rqst[0].rq_iov = open_iov;
2258         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2259
2260         oparms.tcon = tcon;
2261         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2262         oparms.disposition = FILE_OPEN;
2263         oparms.create_options = cifs_create_options(cifs_sb, 0);
2264         oparms.fid = fid;
2265         oparms.reconnect = false;
2266
2267         rc = SMB2_open_init(tcon, server,
2268                             &rqst[0], &oplock, &oparms, utf16_path);
2269         if (rc)
2270                 goto qdf_free;
2271         smb2_set_next_command(tcon, &rqst[0]);
2272
2273         /* Query directory */
2274         srch_inf->entries_in_buffer = 0;
2275         srch_inf->index_of_last_entry = 2;
2276
2277         memset(&qd_iov, 0, sizeof(qd_iov));
2278         rqst[1].rq_iov = qd_iov;
2279         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2280
2281         rc = SMB2_query_directory_init(xid, tcon, server,
2282                                        &rqst[1],
2283                                        COMPOUND_FID, COMPOUND_FID,
2284                                        0, srch_inf->info_level);
2285         if (rc)
2286                 goto qdf_free;
2287
2288         smb2_set_related(&rqst[1]);
2289
2290         rc = compound_send_recv(xid, tcon->ses, server,
2291                                 flags, 2, rqst,
2292                                 resp_buftype, rsp_iov);
2293
2294         /* If the open failed there is nothing to do */
2295         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2296         if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
2297                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2298                 goto qdf_free;
2299         }
2300         fid->persistent_fid = op_rsp->PersistentFileId;
2301         fid->volatile_fid = op_rsp->VolatileFileId;
2302
2303         /* Anything else than ENODATA means a genuine error */
2304         if (rc && rc != -ENODATA) {
2305                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2306                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2307                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2308                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2309                 goto qdf_free;
2310         }
2311
2312         atomic_inc(&tcon->num_remote_opens);
2313
2314         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2315         if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
2316                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2317                                           tcon->tid, tcon->ses->Suid, 0, 0);
2318                 srch_inf->endOfSearch = true;
2319                 rc = 0;
2320                 goto qdf_free;
2321         }
2322
2323         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2324                                         srch_inf);
2325         if (rc) {
2326                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2327                         tcon->ses->Suid, 0, 0, rc);
2328                 goto qdf_free;
2329         }
2330         resp_buftype[1] = CIFS_NO_BUFFER;
2331
2332         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2333                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2334
2335  qdf_free:
2336         kfree(utf16_path);
2337         SMB2_open_free(&rqst[0]);
2338         SMB2_query_directory_free(&rqst[1]);
2339         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2340         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2341         return rc;
2342 }
2343
2344 static int
2345 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2346                     struct cifs_fid *fid, __u16 search_flags,
2347                     struct cifs_search_info *srch_inf)
2348 {
2349         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2350                                     fid->volatile_fid, 0, srch_inf);
2351 }
2352
2353 static int
2354 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2355                struct cifs_fid *fid)
2356 {
2357         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2358 }
2359
2360 /*
2361  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2362  * the number of credits and return true. Otherwise - return false.
2363  */
2364 static bool
2365 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2366 {
2367         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2368
2369         if (shdr->Status != STATUS_PENDING)
2370                 return false;
2371
2372         if (shdr->CreditRequest) {
2373                 spin_lock(&server->req_lock);
2374                 server->credits += le16_to_cpu(shdr->CreditRequest);
2375                 spin_unlock(&server->req_lock);
2376                 wake_up(&server->request_q);
2377         }
2378
2379         return true;
2380 }
2381
2382 static bool
2383 smb2_is_session_expired(char *buf)
2384 {
2385         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2386
2387         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2388             shdr->Status != STATUS_USER_SESSION_DELETED)
2389                 return false;
2390
2391         trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2392                                le16_to_cpu(shdr->Command),
2393                                le64_to_cpu(shdr->MessageId));
2394         cifs_dbg(FYI, "Session expired or deleted\n");
2395
2396         return true;
2397 }
2398
2399 static bool
2400 smb2_is_status_io_timeout(char *buf)
2401 {
2402         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2403
2404         if (shdr->Status == STATUS_IO_TIMEOUT)
2405                 return true;
2406         else
2407                 return false;
2408 }
2409
2410 static int
2411 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2412                      struct cifsInodeInfo *cinode)
2413 {
2414         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2415                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2416                                         smb2_get_lease_state(cinode));
2417
2418         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2419                                  fid->volatile_fid,
2420                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2421 }
2422
2423 void
2424 smb2_set_related(struct smb_rqst *rqst)
2425 {
2426         struct smb2_sync_hdr *shdr;
2427
2428         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2429         if (shdr == NULL) {
2430                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2431                 return;
2432         }
2433         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2434 }
2435
2436 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2437
2438 void
2439 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2440 {
2441         struct smb2_sync_hdr *shdr;
2442         struct cifs_ses *ses = tcon->ses;
2443         struct TCP_Server_Info *server = ses->server;
2444         unsigned long len = smb_rqst_len(server, rqst);
2445         int i, num_padding;
2446
2447         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2448         if (shdr == NULL) {
2449                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2450                 return;
2451         }
2452
2453         /* SMB headers in a compound are 8 byte aligned. */
2454
2455         /* No padding needed */
2456         if (!(len & 7))
2457                 goto finished;
2458
2459         num_padding = 8 - (len & 7);
2460         if (!smb3_encryption_required(tcon)) {
2461                 /*
2462                  * If we do not have encryption then we can just add an extra
2463                  * iov for the padding.
2464                  */
2465                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2466                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2467                 rqst->rq_nvec++;
2468                 len += num_padding;
2469         } else {
2470                 /*
2471                  * We can not add a small padding iov for the encryption case
2472                  * because the encryption framework can not handle the padding
2473                  * iovs.
2474                  * We have to flatten this into a single buffer and add
2475                  * the padding to it.
2476                  */
2477                 for (i = 1; i < rqst->rq_nvec; i++) {
2478                         memcpy(rqst->rq_iov[0].iov_base +
2479                                rqst->rq_iov[0].iov_len,
2480                                rqst->rq_iov[i].iov_base,
2481                                rqst->rq_iov[i].iov_len);
2482                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2483                 }
2484                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2485                        0, num_padding);
2486                 rqst->rq_iov[0].iov_len += num_padding;
2487                 len += num_padding;
2488                 rqst->rq_nvec = 1;
2489         }
2490
2491  finished:
2492         shdr->NextCommand = cpu_to_le32(len);
2493 }
2494
2495 /*
2496  * Passes the query info response back to the caller on success.
2497  * Caller need to free this with free_rsp_buf().
2498  */
2499 int
2500 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2501                          __le16 *utf16_path, u32 desired_access,
2502                          u32 class, u32 type, u32 output_len,
2503                          struct kvec *rsp, int *buftype,
2504                          struct cifs_sb_info *cifs_sb)
2505 {
2506         struct cifs_ses *ses = tcon->ses;
2507         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2508         int flags = CIFS_CP_CREATE_CLOSE_OP;
2509         struct smb_rqst rqst[3];
2510         int resp_buftype[3];
2511         struct kvec rsp_iov[3];
2512         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2513         struct kvec qi_iov[1];
2514         struct kvec close_iov[1];
2515         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2516         struct cifs_open_parms oparms;
2517         struct cifs_fid fid;
2518         int rc;
2519
2520         if (smb3_encryption_required(tcon))
2521                 flags |= CIFS_TRANSFORM_REQ;
2522
2523         memset(rqst, 0, sizeof(rqst));
2524         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2525         memset(rsp_iov, 0, sizeof(rsp_iov));
2526
2527         memset(&open_iov, 0, sizeof(open_iov));
2528         rqst[0].rq_iov = open_iov;
2529         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2530
2531         oparms.tcon = tcon;
2532         oparms.desired_access = desired_access;
2533         oparms.disposition = FILE_OPEN;
2534         oparms.create_options = cifs_create_options(cifs_sb, 0);
2535         oparms.fid = &fid;
2536         oparms.reconnect = false;
2537
2538         rc = SMB2_open_init(tcon, server,
2539                             &rqst[0], &oplock, &oparms, utf16_path);
2540         if (rc)
2541                 goto qic_exit;
2542         smb2_set_next_command(tcon, &rqst[0]);
2543
2544         memset(&qi_iov, 0, sizeof(qi_iov));
2545         rqst[1].rq_iov = qi_iov;
2546         rqst[1].rq_nvec = 1;
2547
2548         rc = SMB2_query_info_init(tcon, server,
2549                                   &rqst[1], COMPOUND_FID, COMPOUND_FID,
2550                                   class, type, 0,
2551                                   output_len, 0,
2552                                   NULL);
2553         if (rc)
2554                 goto qic_exit;
2555         smb2_set_next_command(tcon, &rqst[1]);
2556         smb2_set_related(&rqst[1]);
2557
2558         memset(&close_iov, 0, sizeof(close_iov));
2559         rqst[2].rq_iov = close_iov;
2560         rqst[2].rq_nvec = 1;
2561
2562         rc = SMB2_close_init(tcon, server,
2563                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2564         if (rc)
2565                 goto qic_exit;
2566         smb2_set_related(&rqst[2]);
2567
2568         rc = compound_send_recv(xid, ses, server,
2569                                 flags, 3, rqst,
2570                                 resp_buftype, rsp_iov);
2571         if (rc) {
2572                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2573                 if (rc == -EREMCHG) {
2574                         tcon->need_reconnect = true;
2575                         pr_warn_once("server share %s deleted\n",
2576                                      tcon->treeName);
2577                 }
2578                 goto qic_exit;
2579         }
2580         *rsp = rsp_iov[1];
2581         *buftype = resp_buftype[1];
2582
2583  qic_exit:
2584         SMB2_open_free(&rqst[0]);
2585         SMB2_query_info_free(&rqst[1]);
2586         SMB2_close_free(&rqst[2]);
2587         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2588         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2589         return rc;
2590 }
2591
2592 static int
2593 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2594              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2595 {
2596         struct smb2_query_info_rsp *rsp;
2597         struct smb2_fs_full_size_info *info = NULL;
2598         __le16 utf16_path = 0; /* Null - open root of share */
2599         struct kvec rsp_iov = {NULL, 0};
2600         int buftype = CIFS_NO_BUFFER;
2601         int rc;
2602
2603
2604         rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2605                                       FILE_READ_ATTRIBUTES,
2606                                       FS_FULL_SIZE_INFORMATION,
2607                                       SMB2_O_INFO_FILESYSTEM,
2608                                       sizeof(struct smb2_fs_full_size_info),
2609                                       &rsp_iov, &buftype, cifs_sb);
2610         if (rc)
2611                 goto qfs_exit;
2612
2613         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2614         buf->f_type = SMB2_MAGIC_NUMBER;
2615         info = (struct smb2_fs_full_size_info *)(
2616                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2617         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2618                                le32_to_cpu(rsp->OutputBufferLength),
2619                                &rsp_iov,
2620                                sizeof(struct smb2_fs_full_size_info));
2621         if (!rc)
2622                 smb2_copy_fs_info_to_kstatfs(info, buf);
2623
2624 qfs_exit:
2625         free_rsp_buf(buftype, rsp_iov.iov_base);
2626         return rc;
2627 }
2628
2629 static int
2630 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2631                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2632 {
2633         int rc;
2634         __le16 srch_path = 0; /* Null - open root of share */
2635         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2636         struct cifs_open_parms oparms;
2637         struct cifs_fid fid;
2638
2639         if (!tcon->posix_extensions)
2640                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2641
2642         oparms.tcon = tcon;
2643         oparms.desired_access = FILE_READ_ATTRIBUTES;
2644         oparms.disposition = FILE_OPEN;
2645         oparms.create_options = cifs_create_options(cifs_sb, 0);
2646         oparms.fid = &fid;
2647         oparms.reconnect = false;
2648
2649         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2650                        NULL, NULL);
2651         if (rc)
2652                 return rc;
2653
2654         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2655                                    fid.volatile_fid, buf);
2656         buf->f_type = SMB2_MAGIC_NUMBER;
2657         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2658         return rc;
2659 }
2660
2661 static bool
2662 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2663 {
2664         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2665                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2666 }
2667
2668 static int
2669 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2670                __u64 length, __u32 type, int lock, int unlock, bool wait)
2671 {
2672         if (unlock && !lock)
2673                 type = SMB2_LOCKFLAG_UNLOCK;
2674         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2675                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2676                          current->tgid, length, offset, type, wait);
2677 }
2678
2679 static void
2680 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2681 {
2682         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2683 }
2684
2685 static void
2686 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2687 {
2688         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2689 }
2690
2691 static void
2692 smb2_new_lease_key(struct cifs_fid *fid)
2693 {
2694         generate_random_uuid(fid->lease_key);
2695 }
2696
2697 static int
2698 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2699                    const char *search_name,
2700                    struct dfs_info3_param **target_nodes,
2701                    unsigned int *num_of_nodes,
2702                    const struct nls_table *nls_codepage, int remap)
2703 {
2704         int rc;
2705         __le16 *utf16_path = NULL;
2706         int utf16_path_len = 0;
2707         struct cifs_tcon *tcon;
2708         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2709         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2710         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2711
2712         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2713
2714         /*
2715          * Try to use the IPC tcon, otherwise just use any
2716          */
2717         tcon = ses->tcon_ipc;
2718         if (tcon == NULL) {
2719                 spin_lock(&cifs_tcp_ses_lock);
2720                 tcon = list_first_entry_or_null(&ses->tcon_list,
2721                                                 struct cifs_tcon,
2722                                                 tcon_list);
2723                 if (tcon)
2724                         tcon->tc_count++;
2725                 spin_unlock(&cifs_tcp_ses_lock);
2726         }
2727
2728         if (tcon == NULL) {
2729                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2730                          ses);
2731                 rc = -ENOTCONN;
2732                 goto out;
2733         }
2734
2735         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2736                                            &utf16_path_len,
2737                                            nls_codepage, remap);
2738         if (!utf16_path) {
2739                 rc = -ENOMEM;
2740                 goto out;
2741         }
2742
2743         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2744         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2745         if (!dfs_req) {
2746                 rc = -ENOMEM;
2747                 goto out;
2748         }
2749
2750         /* Highest DFS referral version understood */
2751         dfs_req->MaxReferralLevel = DFS_VERSION;
2752
2753         /* Path to resolve in an UTF-16 null-terminated string */
2754         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2755
2756         do {
2757                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2758                                 FSCTL_DFS_GET_REFERRALS,
2759                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2760                                 (char **)&dfs_rsp, &dfs_rsp_size);
2761         } while (rc == -EAGAIN);
2762
2763         if (rc) {
2764                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2765                         cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2766                 goto out;
2767         }
2768
2769         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2770                                  num_of_nodes, target_nodes,
2771                                  nls_codepage, remap, search_name,
2772                                  true /* is_unicode */);
2773         if (rc) {
2774                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2775                 goto out;
2776         }
2777
2778  out:
2779         if (tcon && !tcon->ipc) {
2780                 /* ipc tcons are not refcounted */
2781                 spin_lock(&cifs_tcp_ses_lock);
2782                 tcon->tc_count--;
2783                 spin_unlock(&cifs_tcp_ses_lock);
2784         }
2785         kfree(utf16_path);
2786         kfree(dfs_req);
2787         kfree(dfs_rsp);
2788         return rc;
2789 }
2790
2791 static int
2792 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2793                       u32 plen, char **target_path,
2794                       struct cifs_sb_info *cifs_sb)
2795 {
2796         unsigned int len;
2797
2798         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2799         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2800
2801         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2802                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2803                         le64_to_cpu(symlink_buf->InodeType));
2804                 return -EOPNOTSUPP;
2805         }
2806
2807         *target_path = cifs_strndup_from_utf16(
2808                                 symlink_buf->PathBuffer,
2809                                 len, true, cifs_sb->local_nls);
2810         if (!(*target_path))
2811                 return -ENOMEM;
2812
2813         convert_delimiter(*target_path, '/');
2814         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2815
2816         return 0;
2817 }
2818
2819 static int
2820 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2821                       u32 plen, char **target_path,
2822                       struct cifs_sb_info *cifs_sb)
2823 {
2824         unsigned int sub_len;
2825         unsigned int sub_offset;
2826
2827         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2828
2829         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2830         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2831         if (sub_offset + 20 > plen ||
2832             sub_offset + sub_len + 20 > plen) {
2833                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2834                 return -EIO;
2835         }
2836
2837         *target_path = cifs_strndup_from_utf16(
2838                                 symlink_buf->PathBuffer + sub_offset,
2839                                 sub_len, true, cifs_sb->local_nls);
2840         if (!(*target_path))
2841                 return -ENOMEM;
2842
2843         convert_delimiter(*target_path, '/');
2844         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2845
2846         return 0;
2847 }
2848
2849 static int
2850 parse_reparse_point(struct reparse_data_buffer *buf,
2851                     u32 plen, char **target_path,
2852                     struct cifs_sb_info *cifs_sb)
2853 {
2854         if (plen < sizeof(struct reparse_data_buffer)) {
2855                 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2856                          plen);
2857                 return -EIO;
2858         }
2859
2860         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2861             sizeof(struct reparse_data_buffer)) {
2862                 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2863                          plen);
2864                 return -EIO;
2865         }
2866
2867         /* See MS-FSCC 2.1.2 */
2868         switch (le32_to_cpu(buf->ReparseTag)) {
2869         case IO_REPARSE_TAG_NFS:
2870                 return parse_reparse_posix(
2871                         (struct reparse_posix_data *)buf,
2872                         plen, target_path, cifs_sb);
2873         case IO_REPARSE_TAG_SYMLINK:
2874                 return parse_reparse_symlink(
2875                         (struct reparse_symlink_data_buffer *)buf,
2876                         plen, target_path, cifs_sb);
2877         default:
2878                 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
2879                          le32_to_cpu(buf->ReparseTag));
2880                 return -EOPNOTSUPP;
2881         }
2882 }
2883
2884 #define SMB2_SYMLINK_STRUCT_SIZE \
2885         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2886
2887 static int
2888 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2889                    struct cifs_sb_info *cifs_sb, const char *full_path,
2890                    char **target_path, bool is_reparse_point)
2891 {
2892         int rc;
2893         __le16 *utf16_path = NULL;
2894         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2895         struct cifs_open_parms oparms;
2896         struct cifs_fid fid;
2897         struct kvec err_iov = {NULL, 0};
2898         struct smb2_err_rsp *err_buf = NULL;
2899         struct smb2_symlink_err_rsp *symlink;
2900         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2901         unsigned int sub_len;
2902         unsigned int sub_offset;
2903         unsigned int print_len;
2904         unsigned int print_offset;
2905         int flags = CIFS_CP_CREATE_CLOSE_OP;
2906         struct smb_rqst rqst[3];
2907         int resp_buftype[3];
2908         struct kvec rsp_iov[3];
2909         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2910         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2911         struct kvec close_iov[1];
2912         struct smb2_create_rsp *create_rsp;
2913         struct smb2_ioctl_rsp *ioctl_rsp;
2914         struct reparse_data_buffer *reparse_buf;
2915         int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
2916         u32 plen;
2917
2918         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2919
2920         *target_path = NULL;
2921
2922         if (smb3_encryption_required(tcon))
2923                 flags |= CIFS_TRANSFORM_REQ;
2924
2925         memset(rqst, 0, sizeof(rqst));
2926         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2927         memset(rsp_iov, 0, sizeof(rsp_iov));
2928
2929         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2930         if (!utf16_path)
2931                 return -ENOMEM;
2932
2933         /* Open */
2934         memset(&open_iov, 0, sizeof(open_iov));
2935         rqst[0].rq_iov = open_iov;
2936         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2937
2938         memset(&oparms, 0, sizeof(oparms));
2939         oparms.tcon = tcon;
2940         oparms.desired_access = FILE_READ_ATTRIBUTES;
2941         oparms.disposition = FILE_OPEN;
2942         oparms.create_options = cifs_create_options(cifs_sb, create_options);
2943         oparms.fid = &fid;
2944         oparms.reconnect = false;
2945
2946         rc = SMB2_open_init(tcon, server,
2947                             &rqst[0], &oplock, &oparms, utf16_path);
2948         if (rc)
2949                 goto querty_exit;
2950         smb2_set_next_command(tcon, &rqst[0]);
2951
2952
2953         /* IOCTL */
2954         memset(&io_iov, 0, sizeof(io_iov));
2955         rqst[1].rq_iov = io_iov;
2956         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2957
2958         rc = SMB2_ioctl_init(tcon, server,
2959                              &rqst[1], fid.persistent_fid,
2960                              fid.volatile_fid, FSCTL_GET_REPARSE_POINT, NULL, 0,
2961                              CIFSMaxBufSize -
2962                              MAX_SMB2_CREATE_RESPONSE_SIZE -
2963                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
2964         if (rc)
2965                 goto querty_exit;
2966
2967         smb2_set_next_command(tcon, &rqst[1]);
2968         smb2_set_related(&rqst[1]);
2969
2970
2971         /* Close */
2972         memset(&close_iov, 0, sizeof(close_iov));
2973         rqst[2].rq_iov = close_iov;
2974         rqst[2].rq_nvec = 1;
2975
2976         rc = SMB2_close_init(tcon, server,
2977                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2978         if (rc)
2979                 goto querty_exit;
2980
2981         smb2_set_related(&rqst[2]);
2982
2983         rc = compound_send_recv(xid, tcon->ses, server,
2984                                 flags, 3, rqst,
2985                                 resp_buftype, rsp_iov);
2986
2987         create_rsp = rsp_iov[0].iov_base;
2988         if (create_rsp && create_rsp->sync_hdr.Status)
2989                 err_iov = rsp_iov[0];
2990         ioctl_rsp = rsp_iov[1].iov_base;
2991
2992         /*
2993          * Open was successful and we got an ioctl response.
2994          */
2995         if ((rc == 0) && (is_reparse_point)) {
2996                 /* See MS-FSCC 2.3.23 */
2997
2998                 reparse_buf = (struct reparse_data_buffer *)
2999                         ((char *)ioctl_rsp +
3000                          le32_to_cpu(ioctl_rsp->OutputOffset));
3001                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3002
3003                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3004                     rsp_iov[1].iov_len) {
3005                         cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
3006                                  plen);
3007                         rc = -EIO;
3008                         goto querty_exit;
3009                 }
3010
3011                 rc = parse_reparse_point(reparse_buf, plen, target_path,
3012                                          cifs_sb);
3013                 goto querty_exit;
3014         }
3015
3016         if (!rc || !err_iov.iov_base) {
3017                 rc = -ENOENT;
3018                 goto querty_exit;
3019         }
3020
3021         err_buf = err_iov.iov_base;
3022         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
3023             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
3024                 rc = -EINVAL;
3025                 goto querty_exit;
3026         }
3027
3028         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
3029         if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
3030             le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
3031                 rc = -EINVAL;
3032                 goto querty_exit;
3033         }
3034
3035         /* open must fail on symlink - reset rc */
3036         rc = 0;
3037         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
3038         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
3039         print_len = le16_to_cpu(symlink->PrintNameLength);
3040         print_offset = le16_to_cpu(symlink->PrintNameOffset);
3041
3042         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
3043                 rc = -EINVAL;
3044                 goto querty_exit;
3045         }
3046
3047         if (err_iov.iov_len <
3048             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
3049                 rc = -EINVAL;
3050                 goto querty_exit;
3051         }
3052
3053         *target_path = cifs_strndup_from_utf16(
3054                                 (char *)symlink->PathBuffer + sub_offset,
3055                                 sub_len, true, cifs_sb->local_nls);
3056         if (!(*target_path)) {
3057                 rc = -ENOMEM;
3058                 goto querty_exit;
3059         }
3060         convert_delimiter(*target_path, '/');
3061         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
3062
3063  querty_exit:
3064         cifs_dbg(FYI, "query symlink rc %d\n", rc);
3065         kfree(utf16_path);
3066         SMB2_open_free(&rqst[0]);
3067         SMB2_ioctl_free(&rqst[1]);
3068         SMB2_close_free(&rqst[2]);
3069         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3070         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3071         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3072         return rc;
3073 }
3074
3075 int
3076 smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
3077                    struct cifs_sb_info *cifs_sb, const char *full_path,
3078                    __u32 *tag)
3079 {
3080         int rc;
3081         __le16 *utf16_path = NULL;
3082         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3083         struct cifs_open_parms oparms;
3084         struct cifs_fid fid;
3085         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3086         int flags = CIFS_CP_CREATE_CLOSE_OP;
3087         struct smb_rqst rqst[3];
3088         int resp_buftype[3];
3089         struct kvec rsp_iov[3];
3090         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3091         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3092         struct kvec close_iov[1];
3093         struct smb2_ioctl_rsp *ioctl_rsp;
3094         struct reparse_data_buffer *reparse_buf;
3095         u32 plen;
3096
3097         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3098
3099         if (smb3_encryption_required(tcon))
3100                 flags |= CIFS_TRANSFORM_REQ;
3101
3102         memset(rqst, 0, sizeof(rqst));
3103         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3104         memset(rsp_iov, 0, sizeof(rsp_iov));
3105
3106         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3107         if (!utf16_path)
3108                 return -ENOMEM;
3109
3110         /*
3111          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3112          * to see if there is a handle already open that we can use
3113          */
3114         memset(&open_iov, 0, sizeof(open_iov));
3115         rqst[0].rq_iov = open_iov;
3116         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3117
3118         memset(&oparms, 0, sizeof(oparms));
3119         oparms.tcon = tcon;
3120         oparms.desired_access = FILE_READ_ATTRIBUTES;
3121         oparms.disposition = FILE_OPEN;
3122         oparms.create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT);
3123         oparms.fid = &fid;
3124         oparms.reconnect = false;
3125
3126         rc = SMB2_open_init(tcon, server,
3127                             &rqst[0], &oplock, &oparms, utf16_path);
3128         if (rc)
3129                 goto query_rp_exit;
3130         smb2_set_next_command(tcon, &rqst[0]);
3131
3132
3133         /* IOCTL */
3134         memset(&io_iov, 0, sizeof(io_iov));
3135         rqst[1].rq_iov = io_iov;
3136         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3137
3138         rc = SMB2_ioctl_init(tcon, server,
3139                              &rqst[1], COMPOUND_FID,
3140                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3141                              CIFSMaxBufSize -
3142                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3143                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3144         if (rc)
3145                 goto query_rp_exit;
3146
3147         smb2_set_next_command(tcon, &rqst[1]);
3148         smb2_set_related(&rqst[1]);
3149
3150
3151         /* Close */
3152         memset(&close_iov, 0, sizeof(close_iov));
3153         rqst[2].rq_iov = close_iov;
3154         rqst[2].rq_nvec = 1;
3155
3156         rc = SMB2_close_init(tcon, server,
3157                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3158         if (rc)
3159                 goto query_rp_exit;
3160
3161         smb2_set_related(&rqst[2]);
3162
3163         rc = compound_send_recv(xid, tcon->ses, server,
3164                                 flags, 3, rqst,
3165                                 resp_buftype, rsp_iov);
3166
3167         ioctl_rsp = rsp_iov[1].iov_base;
3168
3169         /*
3170          * Open was successful and we got an ioctl response.
3171          */
3172         if (rc == 0) {
3173                 /* See MS-FSCC 2.3.23 */
3174
3175                 reparse_buf = (struct reparse_data_buffer *)
3176                         ((char *)ioctl_rsp +
3177                          le32_to_cpu(ioctl_rsp->OutputOffset));
3178                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3179
3180                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3181                     rsp_iov[1].iov_len) {
3182                         cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3183                                  plen);
3184                         rc = -EIO;
3185                         goto query_rp_exit;
3186                 }
3187                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3188         }
3189
3190  query_rp_exit:
3191         kfree(utf16_path);
3192         SMB2_open_free(&rqst[0]);
3193         SMB2_ioctl_free(&rqst[1]);
3194         SMB2_close_free(&rqst[2]);
3195         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3196         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3197         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3198         return rc;
3199 }
3200
3201 static struct cifs_ntsd *
3202 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3203                 const struct cifs_fid *cifsfid, u32 *pacllen)
3204 {
3205         struct cifs_ntsd *pntsd = NULL;
3206         unsigned int xid;
3207         int rc = -EOPNOTSUPP;
3208         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3209
3210         if (IS_ERR(tlink))
3211                 return ERR_CAST(tlink);
3212
3213         xid = get_xid();
3214         cifs_dbg(FYI, "trying to get acl\n");
3215
3216         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3217                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
3218         free_xid(xid);
3219
3220         cifs_put_tlink(tlink);
3221
3222         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3223         if (rc)
3224                 return ERR_PTR(rc);
3225         return pntsd;
3226
3227 }
3228
3229 static struct cifs_ntsd *
3230 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3231                 const char *path, u32 *pacllen)
3232 {
3233         struct cifs_ntsd *pntsd = NULL;
3234         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3235         unsigned int xid;
3236         int rc;
3237         struct cifs_tcon *tcon;
3238         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3239         struct cifs_fid fid;
3240         struct cifs_open_parms oparms;
3241         __le16 *utf16_path;
3242
3243         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3244         if (IS_ERR(tlink))
3245                 return ERR_CAST(tlink);
3246
3247         tcon = tlink_tcon(tlink);
3248         xid = get_xid();
3249
3250         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3251         if (!utf16_path) {
3252                 rc = -ENOMEM;
3253                 free_xid(xid);
3254                 return ERR_PTR(rc);
3255         }
3256
3257         oparms.tcon = tcon;
3258         oparms.desired_access = READ_CONTROL;
3259         oparms.disposition = FILE_OPEN;
3260         /*
3261          * When querying an ACL, even if the file is a symlink we want to open
3262          * the source not the target, and so the protocol requires that the
3263          * client specify this flag when opening a reparse point
3264          */
3265         oparms.create_options = cifs_create_options(cifs_sb, 0) | OPEN_REPARSE_POINT;
3266         oparms.fid = &fid;
3267         oparms.reconnect = false;
3268
3269         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3270                        NULL);
3271         kfree(utf16_path);
3272         if (!rc) {
3273                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3274                             fid.volatile_fid, (void **)&pntsd, pacllen);
3275                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3276         }
3277
3278         cifs_put_tlink(tlink);
3279         free_xid(xid);
3280
3281         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3282         if (rc)
3283                 return ERR_PTR(rc);
3284         return pntsd;
3285 }
3286
3287 static int
3288 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3289                 struct inode *inode, const char *path, int aclflag)
3290 {
3291         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3292         unsigned int xid;
3293         int rc, access_flags = 0;
3294         struct cifs_tcon *tcon;
3295         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3296         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3297         struct cifs_fid fid;
3298         struct cifs_open_parms oparms;
3299         __le16 *utf16_path;
3300
3301         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3302         if (IS_ERR(tlink))
3303                 return PTR_ERR(tlink);
3304
3305         tcon = tlink_tcon(tlink);
3306         xid = get_xid();
3307
3308         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
3309                 access_flags = WRITE_OWNER;
3310         else
3311                 access_flags = WRITE_DAC;
3312
3313         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3314         if (!utf16_path) {
3315                 rc = -ENOMEM;
3316                 free_xid(xid);
3317                 return rc;
3318         }
3319
3320         oparms.tcon = tcon;
3321         oparms.desired_access = access_flags;
3322         oparms.create_options = cifs_create_options(cifs_sb, 0);
3323         oparms.disposition = FILE_OPEN;
3324         oparms.path = path;
3325         oparms.fid = &fid;
3326         oparms.reconnect = false;
3327
3328         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3329                        NULL, NULL);
3330         kfree(utf16_path);
3331         if (!rc) {
3332                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3333                             fid.volatile_fid, pnntsd, acllen, aclflag);
3334                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3335         }
3336
3337         cifs_put_tlink(tlink);
3338         free_xid(xid);
3339         return rc;
3340 }
3341
3342 /* Retrieve an ACL from the server */
3343 static struct cifs_ntsd *
3344 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3345                                       struct inode *inode, const char *path,
3346                                       u32 *pacllen)
3347 {
3348         struct cifs_ntsd *pntsd = NULL;
3349         struct cifsFileInfo *open_file = NULL;
3350
3351         if (inode)
3352                 open_file = find_readable_file(CIFS_I(inode), true);
3353         if (!open_file)
3354                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
3355
3356         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
3357         cifsFileInfo_put(open_file);
3358         return pntsd;
3359 }
3360
3361 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3362                             loff_t offset, loff_t len, bool keep_size)
3363 {
3364         struct cifs_ses *ses = tcon->ses;
3365         struct inode *inode;
3366         struct cifsInodeInfo *cifsi;
3367         struct cifsFileInfo *cfile = file->private_data;
3368         struct file_zero_data_information fsctl_buf;
3369         long rc;
3370         unsigned int xid;
3371         __le64 eof;
3372
3373         xid = get_xid();
3374
3375         inode = d_inode(cfile->dentry);
3376         cifsi = CIFS_I(inode);
3377
3378         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3379                               ses->Suid, offset, len);
3380
3381         /*
3382          * We zero the range through ioctl, so we need remove the page caches
3383          * first, otherwise the data may be inconsistent with the server.
3384          */
3385         truncate_pagecache_range(inode, offset, offset + len - 1);
3386
3387         /* if file not oplocked can't be sure whether asking to extend size */
3388         if (!CIFS_CACHE_READ(cifsi))
3389                 if (keep_size == false) {
3390                         rc = -EOPNOTSUPP;
3391                         trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3392                                 tcon->tid, ses->Suid, offset, len, rc);
3393                         free_xid(xid);
3394                         return rc;
3395                 }
3396
3397         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3398
3399         fsctl_buf.FileOffset = cpu_to_le64(offset);
3400         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3401
3402         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3403                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3404                         (char *)&fsctl_buf,
3405                         sizeof(struct file_zero_data_information),
3406                         0, NULL, NULL);
3407         if (rc)
3408                 goto zero_range_exit;
3409
3410         /*
3411          * do we also need to change the size of the file?
3412          */
3413         if (keep_size == false && i_size_read(inode) < offset + len) {
3414                 eof = cpu_to_le64(offset + len);
3415                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3416                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3417         }
3418
3419  zero_range_exit:
3420         free_xid(xid);
3421         if (rc)
3422                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3423                               ses->Suid, offset, len, rc);
3424         else
3425                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3426                               ses->Suid, offset, len);
3427         return rc;
3428 }
3429
3430 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3431                             loff_t offset, loff_t len)
3432 {
3433         struct inode *inode = file_inode(file);
3434         struct cifsFileInfo *cfile = file->private_data;
3435         struct file_zero_data_information fsctl_buf;
3436         long rc;
3437         unsigned int xid;
3438         __u8 set_sparse = 1;
3439
3440         xid = get_xid();
3441
3442         inode_lock(inode);
3443         /* Need to make file sparse, if not already, before freeing range. */
3444         /* Consider adding equivalent for compressed since it could also work */
3445         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3446                 rc = -EOPNOTSUPP;
3447                 goto out;
3448         }
3449
3450         /*
3451          * We implement the punch hole through ioctl, so we need remove the page
3452          * caches first, otherwise the data may be inconsistent with the server.
3453          */
3454         truncate_pagecache_range(inode, offset, offset + len - 1);
3455
3456         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3457
3458         fsctl_buf.FileOffset = cpu_to_le64(offset);
3459         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3460
3461         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3462                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3463                         (char *)&fsctl_buf,
3464                         sizeof(struct file_zero_data_information),
3465                         CIFSMaxBufSize, NULL, NULL);
3466 out:
3467         inode_unlock(inode);
3468         free_xid(xid);
3469         return rc;
3470 }
3471
3472 static int smb3_simple_fallocate_write_range(unsigned int xid,
3473                                              struct cifs_tcon *tcon,
3474                                              struct cifsFileInfo *cfile,
3475                                              loff_t off, loff_t len,
3476                                              char *buf)
3477 {
3478         struct cifs_io_parms io_parms = {0};
3479         int nbytes;
3480         int rc = 0;
3481         struct kvec iov[2];
3482
3483         io_parms.netfid = cfile->fid.netfid;
3484         io_parms.pid = current->tgid;
3485         io_parms.tcon = tcon;
3486         io_parms.persistent_fid = cfile->fid.persistent_fid;
3487         io_parms.volatile_fid = cfile->fid.volatile_fid;
3488
3489         while (len) {
3490                 io_parms.offset = off;
3491                 io_parms.length = len;
3492                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3493                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3494                 /* iov[0] is reserved for smb header */
3495                 iov[1].iov_base = buf;
3496                 iov[1].iov_len = io_parms.length;
3497                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3498                 if (rc)
3499                         break;
3500                 if (nbytes > len)
3501                         return -EINVAL;
3502                 buf += nbytes;
3503                 off += nbytes;
3504                 len -= nbytes;
3505         }
3506         return rc;
3507 }
3508
3509 static int smb3_simple_fallocate_range(unsigned int xid,
3510                                        struct cifs_tcon *tcon,
3511                                        struct cifsFileInfo *cfile,
3512                                        loff_t off, loff_t len)
3513 {
3514         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3515         u32 out_data_len;
3516         char *buf = NULL;
3517         loff_t l;
3518         int rc;
3519
3520         in_data.file_offset = cpu_to_le64(off);
3521         in_data.length = cpu_to_le64(len);
3522         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3523                         cfile->fid.volatile_fid,
3524                         FSCTL_QUERY_ALLOCATED_RANGES,
3525                         (char *)&in_data, sizeof(in_data),
3526                         1024 * sizeof(struct file_allocated_range_buffer),
3527                         (char **)&out_data, &out_data_len);
3528         if (rc)
3529                 goto out;
3530
3531         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3532         if (buf == NULL) {
3533                 rc = -ENOMEM;
3534                 goto out;
3535         }
3536
3537         tmp_data = out_data;
3538         while (len) {
3539                 /*
3540                  * The rest of the region is unmapped so write it all.
3541                  */
3542                 if (out_data_len == 0) {
3543                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3544                                                cfile, off, len, buf);
3545                         goto out;
3546                 }
3547
3548                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3549                         rc = -EINVAL;
3550                         goto out;
3551                 }
3552
3553                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3554                         /*
3555                          * We are at a hole. Write until the end of the region
3556                          * or until the next allocated data,
3557                          * whichever comes next.
3558                          */
3559                         l = le64_to_cpu(tmp_data->file_offset) - off;
3560                         if (len < l)
3561                                 l = len;
3562                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3563                                                cfile, off, l, buf);
3564                         if (rc)
3565                                 goto out;
3566                         off = off + l;
3567                         len = len - l;
3568                         if (len == 0)
3569                                 goto out;
3570                 }
3571                 /*
3572                  * We are at a section of allocated data, just skip forward
3573                  * until the end of the data or the end of the region
3574                  * we are supposed to fallocate, whichever comes first.
3575                  */
3576                 l = le64_to_cpu(tmp_data->length);
3577                 if (len < l)
3578                         l = len;
3579                 off += l;
3580                 len -= l;
3581
3582                 tmp_data = &tmp_data[1];
3583                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3584         }
3585
3586  out:
3587         kfree(out_data);
3588         kfree(buf);
3589         return rc;
3590 }
3591
3592
3593 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3594                             loff_t off, loff_t len, bool keep_size)
3595 {
3596         struct inode *inode;
3597         struct cifsInodeInfo *cifsi;
3598         struct cifsFileInfo *cfile = file->private_data;
3599         long rc = -EOPNOTSUPP;
3600         unsigned int xid;
3601         __le64 eof;
3602
3603         xid = get_xid();
3604
3605         inode = d_inode(cfile->dentry);
3606         cifsi = CIFS_I(inode);
3607
3608         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3609                                 tcon->ses->Suid, off, len);
3610         /* if file not oplocked can't be sure whether asking to extend size */
3611         if (!CIFS_CACHE_READ(cifsi))
3612                 if (keep_size == false) {
3613                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3614                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3615                         free_xid(xid);
3616                         return rc;
3617                 }
3618
3619         /*
3620          * Extending the file
3621          */
3622         if ((keep_size == false) && i_size_read(inode) < off + len) {
3623                 rc = inode_newsize_ok(inode, off + len);
3624                 if (rc)
3625                         goto out;
3626
3627                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3628                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3629
3630                 eof = cpu_to_le64(off + len);
3631                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3632                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3633                 if (rc == 0) {
3634                         cifsi->server_eof = off + len;
3635                         cifs_setsize(inode, off + len);
3636                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3637                         truncate_setsize(inode, off + len);
3638                 }
3639                 goto out;
3640         }
3641
3642         /*
3643          * Files are non-sparse by default so falloc may be a no-op
3644          * Must check if file sparse. If not sparse, and since we are not
3645          * extending then no need to do anything since file already allocated
3646          */
3647         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3648                 rc = 0;
3649                 goto out;
3650         }
3651
3652         if (keep_size == true) {
3653                 /*
3654                  * We can not preallocate pages beyond the end of the file
3655                  * in SMB2
3656                  */
3657                 if (off >= i_size_read(inode)) {
3658                         rc = 0;
3659                         goto out;
3660                 }
3661                 /*
3662                  * For fallocates that are partially beyond the end of file,
3663                  * clamp len so we only fallocate up to the end of file.
3664                  */
3665                 if (off + len > i_size_read(inode)) {
3666                         len = i_size_read(inode) - off;
3667                 }
3668         }
3669
3670         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3671                 /*
3672                  * At this point, we are trying to fallocate an internal
3673                  * regions of a sparse file. Since smb2 does not have a
3674                  * fallocate command we have two otions on how to emulate this.
3675                  * We can either turn the entire file to become non-sparse
3676                  * which we only do if the fallocate is for virtually
3677                  * the whole file,  or we can overwrite the region with zeroes
3678                  * using SMB2_write, which could be prohibitevly expensive
3679                  * if len is large.
3680                  */
3681                 /*
3682                  * We are only trying to fallocate a small region so
3683                  * just write it with zero.
3684                  */
3685                 if (len <= 1024 * 1024) {
3686                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3687                                                          off, len);
3688                         goto out;
3689                 }
3690
3691                 /*
3692                  * Check if falloc starts within first few pages of file
3693                  * and ends within a few pages of the end of file to
3694                  * ensure that most of file is being forced to be
3695                  * fallocated now. If so then setting whole file sparse
3696                  * ie potentially making a few extra pages at the beginning
3697                  * or end of the file non-sparse via set_sparse is harmless.
3698                  */
3699                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3700                         rc = -EOPNOTSUPP;
3701                         goto out;
3702                 }
3703         }
3704
3705         smb2_set_sparse(xid, tcon, cfile, inode, false);
3706         rc = 0;
3707
3708 out:
3709         if (rc)
3710                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3711                                 tcon->ses->Suid, off, len, rc);
3712         else
3713                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3714                                 tcon->ses->Suid, off, len);
3715
3716         free_xid(xid);
3717         return rc;
3718 }
3719
3720 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3721 {
3722         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3723         struct cifsInodeInfo *cifsi;
3724         struct inode *inode;
3725         int rc = 0;
3726         struct file_allocated_range_buffer in_data, *out_data = NULL;
3727         u32 out_data_len;
3728         unsigned int xid;
3729
3730         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3731                 return generic_file_llseek(file, offset, whence);
3732
3733         inode = d_inode(cfile->dentry);
3734         cifsi = CIFS_I(inode);
3735
3736         if (offset < 0 || offset >= i_size_read(inode))
3737                 return -ENXIO;
3738
3739         xid = get_xid();
3740         /*
3741          * We need to be sure that all dirty pages are written as they
3742          * might fill holes on the server.
3743          * Note that we also MUST flush any written pages since at least
3744          * some servers (Windows2016) will not reflect recent writes in
3745          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3746          */
3747         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3748         if (wrcfile) {
3749                 filemap_write_and_wait(inode->i_mapping);
3750                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3751                 cifsFileInfo_put(wrcfile);
3752         }
3753
3754         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3755                 if (whence == SEEK_HOLE)
3756                         offset = i_size_read(inode);
3757                 goto lseek_exit;
3758         }
3759
3760         in_data.file_offset = cpu_to_le64(offset);
3761         in_data.length = cpu_to_le64(i_size_read(inode));
3762
3763         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3764                         cfile->fid.volatile_fid,
3765                         FSCTL_QUERY_ALLOCATED_RANGES,
3766                         (char *)&in_data, sizeof(in_data),
3767                         sizeof(struct file_allocated_range_buffer),
3768                         (char **)&out_data, &out_data_len);
3769         if (rc == -E2BIG)
3770                 rc = 0;
3771         if (rc)
3772                 goto lseek_exit;
3773
3774         if (whence == SEEK_HOLE && out_data_len == 0)
3775                 goto lseek_exit;
3776
3777         if (whence == SEEK_DATA && out_data_len == 0) {
3778                 rc = -ENXIO;
3779                 goto lseek_exit;
3780         }
3781
3782         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3783                 rc = -EINVAL;
3784                 goto lseek_exit;
3785         }
3786         if (whence == SEEK_DATA) {
3787                 offset = le64_to_cpu(out_data->file_offset);
3788                 goto lseek_exit;
3789         }
3790         if (offset < le64_to_cpu(out_data->file_offset))
3791                 goto lseek_exit;
3792
3793         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3794
3795  lseek_exit:
3796         free_xid(xid);
3797         kfree(out_data);
3798         if (!rc)
3799                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3800         else
3801                 return rc;
3802 }
3803
3804 static int smb3_fiemap(struct cifs_tcon *tcon,
3805                        struct cifsFileInfo *cfile,
3806                        struct fiemap_extent_info *fei, u64 start, u64 len)
3807 {
3808         unsigned int xid;
3809         struct file_allocated_range_buffer in_data, *out_data;
3810         u32 out_data_len;
3811         int i, num, rc, flags, last_blob;
3812         u64 next;
3813
3814         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3815         if (rc)
3816                 return rc;
3817
3818         xid = get_xid();
3819  again:
3820         in_data.file_offset = cpu_to_le64(start);
3821         in_data.length = cpu_to_le64(len);
3822
3823         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3824                         cfile->fid.volatile_fid,
3825                         FSCTL_QUERY_ALLOCATED_RANGES,
3826                         (char *)&in_data, sizeof(in_data),
3827                         1024 * sizeof(struct file_allocated_range_buffer),
3828                         (char **)&out_data, &out_data_len);
3829         if (rc == -E2BIG) {
3830                 last_blob = 0;
3831                 rc = 0;
3832         } else
3833                 last_blob = 1;
3834         if (rc)
3835                 goto out;
3836
3837         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3838                 rc = -EINVAL;
3839                 goto out;
3840         }
3841         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3842                 rc = -EINVAL;
3843                 goto out;
3844         }
3845
3846         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3847         for (i = 0; i < num; i++) {
3848                 flags = 0;
3849                 if (i == num - 1 && last_blob)
3850                         flags |= FIEMAP_EXTENT_LAST;
3851
3852                 rc = fiemap_fill_next_extent(fei,
3853                                 le64_to_cpu(out_data[i].file_offset),
3854                                 le64_to_cpu(out_data[i].file_offset),
3855                                 le64_to_cpu(out_data[i].length),
3856                                 flags);
3857                 if (rc < 0)
3858                         goto out;
3859                 if (rc == 1) {
3860                         rc = 0;
3861                         goto out;
3862                 }
3863         }
3864
3865         if (!last_blob) {
3866                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3867                   le64_to_cpu(out_data[num - 1].length);
3868                 len = len - (next - start);
3869                 start = next;
3870                 goto again;
3871         }
3872
3873  out:
3874         free_xid(xid);
3875         kfree(out_data);
3876         return rc;
3877 }
3878
3879 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3880                            loff_t off, loff_t len)
3881 {
3882         /* KEEP_SIZE already checked for by do_fallocate */
3883         if (mode & FALLOC_FL_PUNCH_HOLE)
3884                 return smb3_punch_hole(file, tcon, off, len);
3885         else if (mode & FALLOC_FL_ZERO_RANGE) {
3886                 if (mode & FALLOC_FL_KEEP_SIZE)
3887                         return smb3_zero_range(file, tcon, off, len, true);
3888                 return smb3_zero_range(file, tcon, off, len, false);
3889         } else if (mode == FALLOC_FL_KEEP_SIZE)
3890                 return smb3_simple_falloc(file, tcon, off, len, true);
3891         else if (mode == 0)
3892                 return smb3_simple_falloc(file, tcon, off, len, false);
3893
3894         return -EOPNOTSUPP;
3895 }
3896
3897 static void
3898 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3899                       struct cifsInodeInfo *cinode, __u32 oplock,
3900                       unsigned int epoch, bool *purge_cache)
3901 {
3902         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3903 }
3904
3905 static void
3906 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3907                        unsigned int epoch, bool *purge_cache);
3908
3909 static void
3910 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3911                        struct cifsInodeInfo *cinode, __u32 oplock,
3912                        unsigned int epoch, bool *purge_cache)
3913 {
3914         unsigned int old_state = cinode->oplock;
3915         unsigned int old_epoch = cinode->epoch;
3916         unsigned int new_state;
3917
3918         if (epoch > old_epoch) {
3919                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3920                 cinode->epoch = epoch;
3921         }
3922
3923         new_state = cinode->oplock;
3924         *purge_cache = false;
3925
3926         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3927             (new_state & CIFS_CACHE_READ_FLG) == 0)
3928                 *purge_cache = true;
3929         else if (old_state == new_state && (epoch - old_epoch > 1))
3930                 *purge_cache = true;
3931 }
3932
3933 static void
3934 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3935                       unsigned int epoch, bool *purge_cache)
3936 {
3937         oplock &= 0xFF;
3938         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3939                 return;
3940         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3941                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3942                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3943                          &cinode->vfs_inode);
3944         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3945                 cinode->oplock = CIFS_CACHE_RW_FLG;
3946                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3947                          &cinode->vfs_inode);
3948         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3949                 cinode->oplock = CIFS_CACHE_READ_FLG;
3950                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3951                          &cinode->vfs_inode);
3952         } else
3953                 cinode->oplock = 0;
3954 }
3955
3956 static void
3957 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3958                        unsigned int epoch, bool *purge_cache)
3959 {
3960         char message[5] = {0};
3961         unsigned int new_oplock = 0;
3962
3963         oplock &= 0xFF;
3964         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3965                 return;
3966
3967         /* Check if the server granted an oplock rather than a lease */
3968         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3969                 return smb2_set_oplock_level(cinode, oplock, epoch,
3970                                              purge_cache);
3971
3972         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3973                 new_oplock |= CIFS_CACHE_READ_FLG;
3974                 strcat(message, "R");
3975         }
3976         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3977                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3978                 strcat(message, "H");
3979         }
3980         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3981                 new_oplock |= CIFS_CACHE_WRITE_FLG;
3982                 strcat(message, "W");
3983         }
3984         if (!new_oplock)
3985                 strncpy(message, "None", sizeof(message));
3986
3987         cinode->oplock = new_oplock;
3988         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3989                  &cinode->vfs_inode);
3990 }
3991
3992 static void
3993 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3994                       unsigned int epoch, bool *purge_cache)
3995 {
3996         unsigned int old_oplock = cinode->oplock;
3997
3998         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3999
4000         if (purge_cache) {
4001                 *purge_cache = false;
4002                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4003                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4004                             (epoch - cinode->epoch > 0))
4005                                 *purge_cache = true;
4006                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4007                                  (epoch - cinode->epoch > 1))
4008                                 *purge_cache = true;
4009                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4010                                  (epoch - cinode->epoch > 1))
4011                                 *purge_cache = true;
4012                         else if (cinode->oplock == 0 &&
4013                                  (epoch - cinode->epoch > 0))
4014                                 *purge_cache = true;
4015                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4016                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4017                             (epoch - cinode->epoch > 0))
4018                                 *purge_cache = true;
4019                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4020                                  (epoch - cinode->epoch > 1))
4021                                 *purge_cache = true;
4022                 }
4023                 cinode->epoch = epoch;
4024         }
4025 }
4026
4027 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4028 static bool
4029 smb2_is_read_op(__u32 oplock)
4030 {
4031         return oplock == SMB2_OPLOCK_LEVEL_II;
4032 }
4033 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4034
4035 static bool
4036 smb21_is_read_op(__u32 oplock)
4037 {
4038         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4039                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4040 }
4041
4042 static __le32
4043 map_oplock_to_lease(u8 oplock)
4044 {
4045         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4046                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
4047         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4048                 return SMB2_LEASE_READ_CACHING;
4049         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4050                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
4051                        SMB2_LEASE_WRITE_CACHING;
4052         return 0;
4053 }
4054
4055 static char *
4056 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4057 {
4058         struct create_lease *buf;
4059
4060         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4061         if (!buf)
4062                 return NULL;
4063
4064         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4065         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4066
4067         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4068                                         (struct create_lease, lcontext));
4069         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4070         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4071                                 (struct create_lease, Name));
4072         buf->ccontext.NameLength = cpu_to_le16(4);
4073         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4074         buf->Name[0] = 'R';
4075         buf->Name[1] = 'q';
4076         buf->Name[2] = 'L';
4077         buf->Name[3] = 's';
4078         return (char *)buf;
4079 }
4080
4081 static char *
4082 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4083 {
4084         struct create_lease_v2 *buf;
4085
4086         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4087         if (!buf)
4088                 return NULL;
4089
4090         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4091         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4092
4093         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4094                                         (struct create_lease_v2, lcontext));
4095         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4096         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4097                                 (struct create_lease_v2, Name));
4098         buf->ccontext.NameLength = cpu_to_le16(4);
4099         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4100         buf->Name[0] = 'R';
4101         buf->Name[1] = 'q';
4102         buf->Name[2] = 'L';
4103         buf->Name[3] = 's';
4104         return (char *)buf;
4105 }
4106
4107 static __u8
4108 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4109 {
4110         struct create_lease *lc = (struct create_lease *)buf;
4111
4112         *epoch = 0; /* not used */
4113         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
4114                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4115         return le32_to_cpu(lc->lcontext.LeaseState);
4116 }
4117
4118 static __u8
4119 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4120 {
4121         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4122
4123         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4124         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
4125                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4126         if (lease_key)
4127                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4128         return le32_to_cpu(lc->lcontext.LeaseState);
4129 }
4130
4131 static unsigned int
4132 smb2_wp_retry_size(struct inode *inode)
4133 {
4134         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
4135                      SMB2_MAX_BUFFER_SIZE);
4136 }
4137
4138 static bool
4139 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4140 {
4141         return !cfile->invalidHandle;
4142 }
4143
4144 static void
4145 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4146                    struct smb_rqst *old_rq, __le16 cipher_type)
4147 {
4148         struct smb2_sync_hdr *shdr =
4149                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
4150
4151         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4152         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4153         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4154         tr_hdr->Flags = cpu_to_le16(0x01);
4155         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4156             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4157                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4158         else
4159                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4160         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4161 }
4162
4163 /* We can not use the normal sg_set_buf() as we will sometimes pass a
4164  * stack object as buf.
4165  */
4166 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
4167                                    unsigned int buflen)
4168 {
4169         void *addr;
4170         /*
4171          * VMAP_STACK (at least) puts stack into the vmalloc address space
4172          */
4173         if (is_vmalloc_addr(buf))
4174                 addr = vmalloc_to_page(buf);
4175         else
4176                 addr = virt_to_page(buf);
4177         sg_set_page(sg, addr, buflen, offset_in_page(buf));
4178 }
4179
4180 /* Assumes the first rqst has a transform header as the first iov.
4181  * I.e.
4182  * rqst[0].rq_iov[0]  is transform header
4183  * rqst[0].rq_iov[1+] data to be encrypted/decrypted
4184  * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
4185  */
4186 static struct scatterlist *
4187 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
4188 {
4189         unsigned int sg_len;
4190         struct scatterlist *sg;
4191         unsigned int i;
4192         unsigned int j;
4193         unsigned int idx = 0;
4194         int skip;
4195
4196         sg_len = 1;
4197         for (i = 0; i < num_rqst; i++)
4198                 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
4199
4200         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
4201         if (!sg)
4202                 return NULL;
4203
4204         sg_init_table(sg, sg_len);
4205         for (i = 0; i < num_rqst; i++) {
4206                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4207                         /*
4208                          * The first rqst has a transform header where the
4209                          * first 20 bytes are not part of the encrypted blob
4210                          */
4211                         skip = (i == 0) && (j == 0) ? 20 : 0;
4212                         smb2_sg_set_buf(&sg[idx++],
4213                                         rqst[i].rq_iov[j].iov_base + skip,
4214                                         rqst[i].rq_iov[j].iov_len - skip);
4215                         }
4216
4217                 for (j = 0; j < rqst[i].rq_npages; j++) {
4218                         unsigned int len, offset;
4219
4220                         rqst_page_get_length(&rqst[i], j, &len, &offset);
4221                         sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
4222                 }
4223         }
4224         smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
4225         return sg;
4226 }
4227
4228 static int
4229 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4230 {
4231         struct cifs_ses *ses;
4232         u8 *ses_enc_key;
4233
4234         spin_lock(&cifs_tcp_ses_lock);
4235         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
4236                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
4237                         if (ses->Suid == ses_id) {
4238                                 ses_enc_key = enc ? ses->smb3encryptionkey :
4239                                         ses->smb3decryptionkey;
4240                                 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4241                                 spin_unlock(&cifs_tcp_ses_lock);
4242                                 return 0;
4243                         }
4244                 }
4245         }
4246         spin_unlock(&cifs_tcp_ses_lock);
4247
4248         return -EAGAIN;
4249 }
4250 /*
4251  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4252  * iov[0]   - transform header (associate data),
4253  * iov[1-N] - SMB2 header and pages - data to encrypt.
4254  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4255  * untouched.
4256  */
4257 static int
4258 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4259               struct smb_rqst *rqst, int enc)
4260 {
4261         struct smb2_transform_hdr *tr_hdr =
4262                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4263         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4264         int rc = 0;
4265         struct scatterlist *sg;
4266         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4267         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4268         struct aead_request *req;
4269         char *iv;
4270         unsigned int iv_len;
4271         DECLARE_CRYPTO_WAIT(wait);
4272         struct crypto_aead *tfm;
4273         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4274
4275         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
4276         if (rc) {
4277                 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
4278                          enc ? "en" : "de");
4279                 return rc;
4280         }
4281
4282         rc = smb3_crypto_aead_allocate(server);
4283         if (rc) {
4284                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4285                 return rc;
4286         }
4287
4288         tfm = enc ? server->secmech.ccmaesencrypt :
4289                                                 server->secmech.ccmaesdecrypt;
4290
4291         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4292                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4293                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4294         else
4295                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4296
4297         if (rc) {
4298                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4299                 return rc;
4300         }
4301
4302         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4303         if (rc) {
4304                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4305                 return rc;
4306         }
4307
4308         req = aead_request_alloc(tfm, GFP_KERNEL);
4309         if (!req) {
4310                 cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
4311                 return -ENOMEM;
4312         }
4313
4314         if (!enc) {
4315                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4316                 crypt_len += SMB2_SIGNATURE_SIZE;
4317         }
4318
4319         sg = init_sg(num_rqst, rqst, sign);
4320         if (!sg) {
4321                 cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
4322                 rc = -ENOMEM;
4323                 goto free_req;
4324         }
4325
4326         iv_len = crypto_aead_ivsize(tfm);
4327         iv = kzalloc(iv_len, GFP_KERNEL);
4328         if (!iv) {
4329                 cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
4330                 rc = -ENOMEM;
4331                 goto free_sg;
4332         }
4333
4334         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4335             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4336                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4337         else {
4338                 iv[0] = 3;
4339                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4340         }
4341
4342         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4343         aead_request_set_ad(req, assoc_data_len);
4344
4345         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4346                                   crypto_req_done, &wait);
4347
4348         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4349                                 : crypto_aead_decrypt(req), &wait);
4350
4351         if (!rc && enc)
4352                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4353
4354         kfree(iv);
4355 free_sg:
4356         kfree(sg);
4357 free_req:
4358         kfree(req);
4359         return rc;
4360 }
4361
4362 void
4363 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4364 {
4365         int i, j;
4366
4367         for (i = 0; i < num_rqst; i++) {
4368                 if (rqst[i].rq_pages) {
4369                         for (j = rqst[i].rq_npages - 1; j >= 0; j--)
4370                                 put_page(rqst[i].rq_pages[j]);
4371                         kfree(rqst[i].rq_pages);
4372                 }
4373         }
4374 }
4375
4376 /*
4377  * This function will initialize new_rq and encrypt the content.
4378  * The first entry, new_rq[0], only contains a single iov which contains
4379  * a smb2_transform_hdr and is pre-allocated by the caller.
4380  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4381  *
4382  * The end result is an array of smb_rqst structures where the first structure
4383  * only contains a single iov for the transform header which we then can pass
4384  * to crypt_message().
4385  *
4386  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4387  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4388  */
4389 static int
4390 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4391                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4392 {
4393         struct page **pages;
4394         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4395         unsigned int npages;
4396         unsigned int orig_len = 0;
4397         int i, j;
4398         int rc = -ENOMEM;
4399
4400         for (i = 1; i < num_rqst; i++) {
4401                 npages = old_rq[i - 1].rq_npages;
4402                 pages = kmalloc_array(npages, sizeof(struct page *),
4403                                       GFP_KERNEL);
4404                 if (!pages)
4405                         goto err_free;
4406
4407                 new_rq[i].rq_pages = pages;
4408                 new_rq[i].rq_npages = npages;
4409                 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
4410                 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
4411                 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
4412                 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
4413                 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
4414
4415                 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
4416
4417                 for (j = 0; j < npages; j++) {
4418                         pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4419                         if (!pages[j])
4420                                 goto err_free;
4421                 }
4422
4423                 /* copy pages form the old */
4424                 for (j = 0; j < npages; j++) {
4425                         char *dst, *src;
4426                         unsigned int offset, len;
4427
4428                         rqst_page_get_length(&new_rq[i], j, &len, &offset);
4429
4430                         dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
4431                         src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
4432
4433                         memcpy(dst, src, len);
4434                         kunmap(new_rq[i].rq_pages[j]);
4435                         kunmap(old_rq[i - 1].rq_pages[j]);
4436                 }
4437         }
4438
4439         /* fill the 1st iov with a transform header */
4440         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4441
4442         rc = crypt_message(server, num_rqst, new_rq, 1);
4443         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4444         if (rc)
4445                 goto err_free;
4446
4447         return rc;
4448
4449 err_free:
4450         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4451         return rc;
4452 }
4453
4454 static int
4455 smb3_is_transform_hdr(void *buf)
4456 {
4457         struct smb2_transform_hdr *trhdr = buf;
4458
4459         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4460 }
4461
4462 static int
4463 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4464                  unsigned int buf_data_size, struct page **pages,
4465                  unsigned int npages, unsigned int page_data_size,
4466                  bool is_offloaded)
4467 {
4468         struct kvec iov[2];
4469         struct smb_rqst rqst = {NULL};
4470         int rc;
4471
4472         iov[0].iov_base = buf;
4473         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4474         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4475         iov[1].iov_len = buf_data_size;
4476
4477         rqst.rq_iov = iov;
4478         rqst.rq_nvec = 2;
4479         rqst.rq_pages = pages;
4480         rqst.rq_npages = npages;
4481         rqst.rq_pagesz = PAGE_SIZE;
4482         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
4483
4484         rc = crypt_message(server, 1, &rqst, 0);
4485         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4486
4487         if (rc)
4488                 return rc;
4489
4490         memmove(buf, iov[1].iov_base, buf_data_size);
4491
4492         if (!is_offloaded)
4493                 server->total_read = buf_data_size + page_data_size;
4494
4495         return rc;
4496 }
4497
4498 static int
4499 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4500                      unsigned int npages, unsigned int len)
4501 {
4502         int i;
4503         int length;
4504
4505         for (i = 0; i < npages; i++) {
4506                 struct page *page = pages[i];
4507                 size_t n;
4508
4509                 n = len;
4510                 if (len >= PAGE_SIZE) {
4511                         /* enough data to fill the page */
4512                         n = PAGE_SIZE;
4513                         len -= n;
4514                 } else {
4515                         zero_user(page, len, PAGE_SIZE - len);
4516                         len = 0;
4517                 }
4518                 length = cifs_read_page_from_socket(server, page, 0, n);
4519                 if (length < 0)
4520                         return length;
4521                 server->total_read += length;
4522         }
4523
4524         return 0;
4525 }
4526
4527 static int
4528 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4529                unsigned int cur_off, struct bio_vec **page_vec)
4530 {
4531         struct bio_vec *bvec;
4532         int i;
4533
4534         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4535         if (!bvec)
4536                 return -ENOMEM;
4537
4538         for (i = 0; i < npages; i++) {
4539                 bvec[i].bv_page = pages[i];
4540                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4541                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4542                 data_size -= bvec[i].bv_len;
4543         }
4544
4545         if (data_size != 0) {
4546                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4547                 kfree(bvec);
4548                 return -EIO;
4549         }
4550
4551         *page_vec = bvec;
4552         return 0;
4553 }
4554
4555 static int
4556 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4557                  char *buf, unsigned int buf_len, struct page **pages,
4558                  unsigned int npages, unsigned int page_data_size,
4559                  bool is_offloaded)
4560 {
4561         unsigned int data_offset;
4562         unsigned int data_len;
4563         unsigned int cur_off;
4564         unsigned int cur_page_idx;
4565         unsigned int pad_len;
4566         struct cifs_readdata *rdata = mid->callback_data;
4567         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4568         struct bio_vec *bvec = NULL;
4569         struct iov_iter iter;
4570         struct kvec iov;
4571         int length;
4572         bool use_rdma_mr = false;
4573
4574         if (shdr->Command != SMB2_READ) {
4575                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4576                 return -ENOTSUPP;
4577         }
4578
4579         if (server->ops->is_session_expired &&
4580             server->ops->is_session_expired(buf)) {
4581                 if (!is_offloaded)
4582                         cifs_reconnect(server);
4583                 return -1;
4584         }
4585
4586         if (server->ops->is_status_pending &&
4587                         server->ops->is_status_pending(buf, server))
4588                 return -1;
4589
4590         /* set up first two iov to get credits */
4591         rdata->iov[0].iov_base = buf;
4592         rdata->iov[0].iov_len = 0;
4593         rdata->iov[1].iov_base = buf;
4594         rdata->iov[1].iov_len =
4595                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4596         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4597                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4598         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4599                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4600
4601         rdata->result = server->ops->map_error(buf, true);
4602         if (rdata->result != 0) {
4603                 cifs_dbg(FYI, "%s: server returned error %d\n",
4604                          __func__, rdata->result);
4605                 /* normal error on read response */
4606                 if (is_offloaded)
4607                         mid->mid_state = MID_RESPONSE_RECEIVED;
4608                 else
4609                         dequeue_mid(mid, false);
4610                 return 0;
4611         }
4612
4613         data_offset = server->ops->read_data_offset(buf);
4614 #ifdef CONFIG_CIFS_SMB_DIRECT
4615         use_rdma_mr = rdata->mr;
4616 #endif
4617         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4618
4619         if (data_offset < server->vals->read_rsp_size) {
4620                 /*
4621                  * win2k8 sometimes sends an offset of 0 when the read
4622                  * is beyond the EOF. Treat it as if the data starts just after
4623                  * the header.
4624                  */
4625                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4626                          __func__, data_offset);
4627                 data_offset = server->vals->read_rsp_size;
4628         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4629                 /* data_offset is beyond the end of smallbuf */
4630                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4631                          __func__, data_offset);
4632                 rdata->result = -EIO;
4633                 if (is_offloaded)
4634                         mid->mid_state = MID_RESPONSE_MALFORMED;
4635                 else
4636                         dequeue_mid(mid, rdata->result);
4637                 return 0;
4638         }
4639
4640         pad_len = data_offset - server->vals->read_rsp_size;
4641
4642         if (buf_len <= data_offset) {
4643                 /* read response payload is in pages */
4644                 cur_page_idx = pad_len / PAGE_SIZE;
4645                 cur_off = pad_len % PAGE_SIZE;
4646
4647                 if (cur_page_idx != 0) {
4648                         /* data offset is beyond the 1st page of response */
4649                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4650                                  __func__, data_offset);
4651                         rdata->result = -EIO;
4652                         if (is_offloaded)
4653                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4654                         else
4655                                 dequeue_mid(mid, rdata->result);
4656                         return 0;
4657                 }
4658
4659                 if (data_len > page_data_size - pad_len) {
4660                         /* data_len is corrupt -- discard frame */
4661                         rdata->result = -EIO;
4662                         if (is_offloaded)
4663                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4664                         else
4665                                 dequeue_mid(mid, rdata->result);
4666                         return 0;
4667                 }
4668
4669                 rdata->result = init_read_bvec(pages, npages, page_data_size,
4670                                                cur_off, &bvec);
4671                 if (rdata->result != 0) {
4672                         if (is_offloaded)
4673                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4674                         else
4675                                 dequeue_mid(mid, rdata->result);
4676                         return 0;
4677                 }
4678
4679                 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4680         } else if (buf_len >= data_offset + data_len) {
4681                 /* read response payload is in buf */
4682                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4683                 iov.iov_base = buf + data_offset;
4684                 iov.iov_len = data_len;
4685                 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4686         } else {
4687                 /* read response payload cannot be in both buf and pages */
4688                 WARN_ONCE(1, "buf can not contain only a part of read data");
4689                 rdata->result = -EIO;
4690                 if (is_offloaded)
4691                         mid->mid_state = MID_RESPONSE_MALFORMED;
4692                 else
4693                         dequeue_mid(mid, rdata->result);
4694                 return 0;
4695         }
4696
4697         length = rdata->copy_into_pages(server, rdata, &iter);
4698
4699         kfree(bvec);
4700
4701         if (length < 0)
4702                 return length;
4703
4704         if (is_offloaded)
4705                 mid->mid_state = MID_RESPONSE_RECEIVED;
4706         else
4707                 dequeue_mid(mid, false);
4708         return length;
4709 }
4710
4711 struct smb2_decrypt_work {
4712         struct work_struct decrypt;
4713         struct TCP_Server_Info *server;
4714         struct page **ppages;
4715         char *buf;
4716         unsigned int npages;
4717         unsigned int len;
4718 };
4719
4720
4721 static void smb2_decrypt_offload(struct work_struct *work)
4722 {
4723         struct smb2_decrypt_work *dw = container_of(work,
4724                                 struct smb2_decrypt_work, decrypt);
4725         int i, rc;
4726         struct mid_q_entry *mid;
4727
4728         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4729                               dw->ppages, dw->npages, dw->len, true);
4730         if (rc) {
4731                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4732                 goto free_pages;
4733         }
4734
4735         dw->server->lstrp = jiffies;
4736         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4737         if (mid == NULL)
4738                 cifs_dbg(FYI, "mid not found\n");
4739         else {
4740                 mid->decrypted = true;
4741                 rc = handle_read_data(dw->server, mid, dw->buf,
4742                                       dw->server->vals->read_rsp_size,
4743                                       dw->ppages, dw->npages, dw->len,
4744                                       true);
4745                 if (rc >= 0) {
4746 #ifdef CONFIG_CIFS_STATS2
4747                         mid->when_received = jiffies;
4748 #endif
4749                         mid->callback(mid);
4750                 } else {
4751                         spin_lock(&GlobalMid_Lock);
4752                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4753                                 mid->mid_state = MID_RETRY_NEEDED;
4754                                 spin_unlock(&GlobalMid_Lock);
4755                                 mid->callback(mid);
4756                         } else {
4757                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4758                                 mid->mid_flags &= ~(MID_DELETED);
4759                                 list_add_tail(&mid->qhead,
4760                                         &dw->server->pending_mid_q);
4761                                 spin_unlock(&GlobalMid_Lock);
4762                         }
4763                 }
4764                 cifs_mid_q_entry_release(mid);
4765         }
4766
4767 free_pages:
4768         for (i = dw->npages-1; i >= 0; i--)
4769                 put_page(dw->ppages[i]);
4770
4771         kfree(dw->ppages);
4772         cifs_small_buf_release(dw->buf);
4773         kfree(dw);
4774 }
4775
4776
4777 static int
4778 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4779                        int *num_mids)
4780 {
4781         char *buf = server->smallbuf;
4782         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4783         unsigned int npages;
4784         struct page **pages;
4785         unsigned int len;
4786         unsigned int buflen = server->pdu_size;
4787         int rc;
4788         int i = 0;
4789         struct smb2_decrypt_work *dw;
4790
4791         *num_mids = 1;
4792         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4793                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4794
4795         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4796         if (rc < 0)
4797                 return rc;
4798         server->total_read += rc;
4799
4800         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4801                 server->vals->read_rsp_size;
4802         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4803
4804         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4805         if (!pages) {
4806                 rc = -ENOMEM;
4807                 goto discard_data;
4808         }
4809
4810         for (; i < npages; i++) {
4811                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4812                 if (!pages[i]) {
4813                         rc = -ENOMEM;
4814                         goto discard_data;
4815                 }
4816         }
4817
4818         /* read read data into pages */
4819         rc = read_data_into_pages(server, pages, npages, len);
4820         if (rc)
4821                 goto free_pages;
4822
4823         rc = cifs_discard_remaining_data(server);
4824         if (rc)
4825                 goto free_pages;
4826
4827         /*
4828          * For large reads, offload to different thread for better performance,
4829          * use more cores decrypting which can be expensive
4830          */
4831
4832         if ((server->min_offload) && (server->in_flight > 1) &&
4833             (server->pdu_size >= server->min_offload)) {
4834                 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4835                 if (dw == NULL)
4836                         goto non_offloaded_decrypt;
4837
4838                 dw->buf = server->smallbuf;
4839                 server->smallbuf = (char *)cifs_small_buf_get();
4840
4841                 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4842
4843                 dw->npages = npages;
4844                 dw->server = server;
4845                 dw->ppages = pages;
4846                 dw->len = len;
4847                 queue_work(decrypt_wq, &dw->decrypt);
4848                 *num_mids = 0; /* worker thread takes care of finding mid */
4849                 return -1;
4850         }
4851
4852 non_offloaded_decrypt:
4853         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4854                               pages, npages, len, false);
4855         if (rc)
4856                 goto free_pages;
4857
4858         *mid = smb2_find_mid(server, buf);
4859         if (*mid == NULL)
4860                 cifs_dbg(FYI, "mid not found\n");
4861         else {
4862                 cifs_dbg(FYI, "mid found\n");
4863                 (*mid)->decrypted = true;
4864                 rc = handle_read_data(server, *mid, buf,
4865                                       server->vals->read_rsp_size,
4866                                       pages, npages, len, false);
4867         }
4868
4869 free_pages:
4870         for (i = i - 1; i >= 0; i--)
4871                 put_page(pages[i]);
4872         kfree(pages);
4873         return rc;
4874 discard_data:
4875         cifs_discard_remaining_data(server);
4876         goto free_pages;
4877 }
4878
4879 static int
4880 receive_encrypted_standard(struct TCP_Server_Info *server,
4881                            struct mid_q_entry **mids, char **bufs,
4882                            int *num_mids)
4883 {
4884         int ret, length;
4885         char *buf = server->smallbuf;
4886         struct smb2_sync_hdr *shdr;
4887         unsigned int pdu_length = server->pdu_size;
4888         unsigned int buf_size;
4889         struct mid_q_entry *mid_entry;
4890         int next_is_large;
4891         char *next_buffer = NULL;
4892
4893         *num_mids = 0;
4894
4895         /* switch to large buffer if too big for a small one */
4896         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4897                 server->large_buf = true;
4898                 memcpy(server->bigbuf, buf, server->total_read);
4899                 buf = server->bigbuf;
4900         }
4901
4902         /* now read the rest */
4903         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4904                                 pdu_length - HEADER_SIZE(server) + 1);
4905         if (length < 0)
4906                 return length;
4907         server->total_read += length;
4908
4909         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4910         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0, false);
4911         if (length)
4912                 return length;
4913
4914         next_is_large = server->large_buf;
4915 one_more:
4916         shdr = (struct smb2_sync_hdr *)buf;
4917         if (shdr->NextCommand) {
4918                 if (next_is_large)
4919                         next_buffer = (char *)cifs_buf_get();
4920                 else
4921                         next_buffer = (char *)cifs_small_buf_get();
4922                 memcpy(next_buffer,
4923                        buf + le32_to_cpu(shdr->NextCommand),
4924                        pdu_length - le32_to_cpu(shdr->NextCommand));
4925         }
4926
4927         mid_entry = smb2_find_mid(server, buf);
4928         if (mid_entry == NULL)
4929                 cifs_dbg(FYI, "mid not found\n");
4930         else {
4931                 cifs_dbg(FYI, "mid found\n");
4932                 mid_entry->decrypted = true;
4933                 mid_entry->resp_buf_size = server->pdu_size;
4934         }
4935
4936         if (*num_mids >= MAX_COMPOUND) {
4937                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4938                 return -1;
4939         }
4940         bufs[*num_mids] = buf;
4941         mids[(*num_mids)++] = mid_entry;
4942
4943         if (mid_entry && mid_entry->handle)
4944                 ret = mid_entry->handle(server, mid_entry);
4945         else
4946                 ret = cifs_handle_standard(server, mid_entry);
4947
4948         if (ret == 0 && shdr->NextCommand) {
4949                 pdu_length -= le32_to_cpu(shdr->NextCommand);
4950                 server->large_buf = next_is_large;
4951                 if (next_is_large)
4952                         server->bigbuf = buf = next_buffer;
4953                 else
4954                         server->smallbuf = buf = next_buffer;
4955                 goto one_more;
4956         } else if (ret != 0) {
4957                 /*
4958                  * ret != 0 here means that we didn't get to handle_mid() thus
4959                  * server->smallbuf and server->bigbuf are still valid. We need
4960                  * to free next_buffer because it is not going to be used
4961                  * anywhere.
4962                  */
4963                 if (next_is_large)
4964                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4965                 else
4966                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4967         }
4968
4969         return ret;
4970 }
4971
4972 static int
4973 smb3_receive_transform(struct TCP_Server_Info *server,
4974                        struct mid_q_entry **mids, char **bufs, int *num_mids)
4975 {
4976         char *buf = server->smallbuf;
4977         unsigned int pdu_length = server->pdu_size;
4978         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4979         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4980
4981         if (pdu_length < sizeof(struct smb2_transform_hdr) +
4982                                                 sizeof(struct smb2_sync_hdr)) {
4983                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4984                          pdu_length);
4985                 cifs_reconnect(server);
4986                 return -ECONNABORTED;
4987         }
4988
4989         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4990                 cifs_server_dbg(VFS, "Transform message is broken\n");
4991                 cifs_reconnect(server);
4992                 return -ECONNABORTED;
4993         }
4994
4995         /* TODO: add support for compounds containing READ. */
4996         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4997                 return receive_encrypted_read(server, &mids[0], num_mids);
4998         }
4999
5000         return receive_encrypted_standard(server, mids, bufs, num_mids);
5001 }
5002
5003 int
5004 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5005 {
5006         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5007
5008         return handle_read_data(server, mid, buf, server->pdu_size,
5009                                 NULL, 0, 0, false);
5010 }
5011
5012 static int
5013 smb2_next_header(char *buf)
5014 {
5015         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
5016         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5017
5018         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5019                 return sizeof(struct smb2_transform_hdr) +
5020                   le32_to_cpu(t_hdr->OriginalMessageSize);
5021
5022         return le32_to_cpu(hdr->NextCommand);
5023 }
5024
5025 static int
5026 smb2_make_node(unsigned int xid, struct inode *inode,
5027                struct dentry *dentry, struct cifs_tcon *tcon,
5028                char *full_path, umode_t mode, dev_t dev)
5029 {
5030         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5031         int rc = -EPERM;
5032         FILE_ALL_INFO *buf = NULL;
5033         struct cifs_io_parms io_parms = {0};
5034         __u32 oplock = 0;
5035         struct cifs_fid fid;
5036         struct cifs_open_parms oparms;
5037         unsigned int bytes_written;
5038         struct win_dev *pdev;
5039         struct kvec iov[2];
5040
5041         /*
5042          * Check if mounted with mount parm 'sfu' mount parm.
5043          * SFU emulation should work with all servers, but only
5044          * supports block and char device (no socket & fifo),
5045          * and was used by default in earlier versions of Windows
5046          */
5047         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5048                 goto out;
5049
5050         /*
5051          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5052          * their current NFS server) uses this approach to expose special files
5053          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5054          */
5055
5056         if (!S_ISCHR(mode) && !S_ISBLK(mode))
5057                 goto out;
5058
5059         cifs_dbg(FYI, "sfu compat create special file\n");
5060
5061         buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
5062         if (buf == NULL) {
5063                 rc = -ENOMEM;
5064                 goto out;
5065         }
5066
5067         oparms.tcon = tcon;
5068         oparms.cifs_sb = cifs_sb;
5069         oparms.desired_access = GENERIC_WRITE;
5070         oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5071                                                     CREATE_OPTION_SPECIAL);
5072         oparms.disposition = FILE_CREATE;
5073         oparms.path = full_path;
5074         oparms.fid = &fid;
5075         oparms.reconnect = false;
5076
5077         if (tcon->ses->server->oplocks)
5078                 oplock = REQ_OPLOCK;
5079         else
5080                 oplock = 0;
5081         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
5082         if (rc)
5083                 goto out;
5084
5085         /*
5086          * BB Do not bother to decode buf since no local inode yet to put
5087          * timestamps in, but we can reuse it safely.
5088          */
5089
5090         pdev = (struct win_dev *)buf;
5091         io_parms.pid = current->tgid;
5092         io_parms.tcon = tcon;
5093         io_parms.offset = 0;
5094         io_parms.length = sizeof(struct win_dev);
5095         iov[1].iov_base = buf;
5096         iov[1].iov_len = sizeof(struct win_dev);
5097         if (S_ISCHR(mode)) {
5098                 memcpy(pdev->type, "IntxCHR", 8);
5099                 pdev->major = cpu_to_le64(MAJOR(dev));
5100                 pdev->minor = cpu_to_le64(MINOR(dev));
5101                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5102                                                         &bytes_written, iov, 1);
5103         } else if (S_ISBLK(mode)) {
5104                 memcpy(pdev->type, "IntxBLK", 8);
5105                 pdev->major = cpu_to_le64(MAJOR(dev));
5106                 pdev->minor = cpu_to_le64(MINOR(dev));
5107                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5108                                                         &bytes_written, iov, 1);
5109         }
5110         tcon->ses->server->ops->close(xid, tcon, &fid);
5111         d_drop(dentry);
5112
5113         /* FIXME: add code here to set EAs */
5114 out:
5115         kfree(buf);
5116         return rc;
5117 }
5118
5119 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5120 struct smb_version_operations smb20_operations = {
5121         .compare_fids = smb2_compare_fids,
5122         .setup_request = smb2_setup_request,
5123         .setup_async_request = smb2_setup_async_request,
5124         .check_receive = smb2_check_receive,
5125         .add_credits = smb2_add_credits,
5126         .set_credits = smb2_set_credits,
5127         .get_credits_field = smb2_get_credits_field,
5128         .get_credits = smb2_get_credits,
5129         .wait_mtu_credits = cifs_wait_mtu_credits,
5130         .get_next_mid = smb2_get_next_mid,
5131         .revert_current_mid = smb2_revert_current_mid,
5132         .read_data_offset = smb2_read_data_offset,
5133         .read_data_length = smb2_read_data_length,
5134         .map_error = map_smb2_to_linux_error,
5135         .find_mid = smb2_find_mid,
5136         .check_message = smb2_check_message,
5137         .dump_detail = smb2_dump_detail,
5138         .clear_stats = smb2_clear_stats,
5139         .print_stats = smb2_print_stats,
5140         .is_oplock_break = smb2_is_valid_oplock_break,
5141         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5142         .downgrade_oplock = smb2_downgrade_oplock,
5143         .need_neg = smb2_need_neg,
5144         .negotiate = smb2_negotiate,
5145         .negotiate_wsize = smb2_negotiate_wsize,
5146         .negotiate_rsize = smb2_negotiate_rsize,
5147         .sess_setup = SMB2_sess_setup,
5148         .logoff = SMB2_logoff,
5149         .tree_connect = SMB2_tcon,
5150         .tree_disconnect = SMB2_tdis,
5151         .qfs_tcon = smb2_qfs_tcon,
5152         .is_path_accessible = smb2_is_path_accessible,
5153         .can_echo = smb2_can_echo,
5154         .echo = SMB2_echo,
5155         .query_path_info = smb2_query_path_info,
5156         .get_srv_inum = smb2_get_srv_inum,
5157         .query_file_info = smb2_query_file_info,
5158         .set_path_size = smb2_set_path_size,
5159         .set_file_size = smb2_set_file_size,
5160         .set_file_info = smb2_set_file_info,
5161         .set_compression = smb2_set_compression,
5162         .mkdir = smb2_mkdir,
5163         .mkdir_setinfo = smb2_mkdir_setinfo,
5164         .rmdir = smb2_rmdir,
5165         .unlink = smb2_unlink,
5166         .rename = smb2_rename_path,
5167         .create_hardlink = smb2_create_hardlink,
5168         .query_symlink = smb2_query_symlink,
5169         .query_mf_symlink = smb3_query_mf_symlink,
5170         .create_mf_symlink = smb3_create_mf_symlink,
5171         .open = smb2_open_file,
5172         .set_fid = smb2_set_fid,
5173         .close = smb2_close_file,
5174         .flush = smb2_flush_file,
5175         .async_readv = smb2_async_readv,
5176         .async_writev = smb2_async_writev,
5177         .sync_read = smb2_sync_read,
5178         .sync_write = smb2_sync_write,
5179         .query_dir_first = smb2_query_dir_first,
5180         .query_dir_next = smb2_query_dir_next,
5181         .close_dir = smb2_close_dir,
5182         .calc_smb_size = smb2_calc_size,
5183         .is_status_pending = smb2_is_status_pending,
5184         .is_session_expired = smb2_is_session_expired,
5185         .oplock_response = smb2_oplock_response,
5186         .queryfs = smb2_queryfs,
5187         .mand_lock = smb2_mand_lock,
5188         .mand_unlock_range = smb2_unlock_range,
5189         .push_mand_locks = smb2_push_mandatory_locks,
5190         .get_lease_key = smb2_get_lease_key,
5191         .set_lease_key = smb2_set_lease_key,
5192         .new_lease_key = smb2_new_lease_key,
5193         .calc_signature = smb2_calc_signature,
5194         .is_read_op = smb2_is_read_op,
5195         .set_oplock_level = smb2_set_oplock_level,
5196         .create_lease_buf = smb2_create_lease_buf,
5197         .parse_lease_buf = smb2_parse_lease_buf,
5198         .copychunk_range = smb2_copychunk_range,
5199         .wp_retry_size = smb2_wp_retry_size,
5200         .dir_needs_close = smb2_dir_needs_close,
5201         .get_dfs_refer = smb2_get_dfs_refer,
5202         .select_sectype = smb2_select_sectype,
5203 #ifdef CONFIG_CIFS_XATTR
5204         .query_all_EAs = smb2_query_eas,
5205         .set_EA = smb2_set_ea,
5206 #endif /* CIFS_XATTR */
5207         .get_acl = get_smb2_acl,
5208         .get_acl_by_fid = get_smb2_acl_by_fid,
5209         .set_acl = set_smb2_acl,
5210         .next_header = smb2_next_header,
5211         .ioctl_query_info = smb2_ioctl_query_info,
5212         .make_node = smb2_make_node,
5213         .fiemap = smb3_fiemap,
5214         .llseek = smb3_llseek,
5215         .is_status_io_timeout = smb2_is_status_io_timeout,
5216 };
5217 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5218
5219 struct smb_version_operations smb21_operations = {
5220         .compare_fids = smb2_compare_fids,
5221         .setup_request = smb2_setup_request,
5222         .setup_async_request = smb2_setup_async_request,
5223         .check_receive = smb2_check_receive,
5224         .add_credits = smb2_add_credits,
5225         .set_credits = smb2_set_credits,
5226         .get_credits_field = smb2_get_credits_field,
5227         .get_credits = smb2_get_credits,
5228         .wait_mtu_credits = smb2_wait_mtu_credits,
5229         .adjust_credits = smb2_adjust_credits,
5230         .get_next_mid = smb2_get_next_mid,
5231         .revert_current_mid = smb2_revert_current_mid,
5232         .read_data_offset = smb2_read_data_offset,
5233         .read_data_length = smb2_read_data_length,
5234         .map_error = map_smb2_to_linux_error,
5235         .find_mid = smb2_find_mid,
5236         .check_message = smb2_check_message,
5237         .dump_detail = smb2_dump_detail,
5238         .clear_stats = smb2_clear_stats,
5239         .print_stats = smb2_print_stats,
5240         .is_oplock_break = smb2_is_valid_oplock_break,
5241         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5242         .downgrade_oplock = smb2_downgrade_oplock,
5243         .need_neg = smb2_need_neg,
5244         .negotiate = smb2_negotiate,
5245         .negotiate_wsize = smb2_negotiate_wsize,
5246         .negotiate_rsize = smb2_negotiate_rsize,
5247         .sess_setup = SMB2_sess_setup,
5248         .logoff = SMB2_logoff,
5249         .tree_connect = SMB2_tcon,
5250         .tree_disconnect = SMB2_tdis,
5251         .qfs_tcon = smb2_qfs_tcon,
5252         .is_path_accessible = smb2_is_path_accessible,
5253         .can_echo = smb2_can_echo,
5254         .echo = SMB2_echo,
5255         .query_path_info = smb2_query_path_info,
5256         .get_srv_inum = smb2_get_srv_inum,
5257         .query_file_info = smb2_query_file_info,
5258         .set_path_size = smb2_set_path_size,
5259         .set_file_size = smb2_set_file_size,
5260         .set_file_info = smb2_set_file_info,
5261         .set_compression = smb2_set_compression,
5262         .mkdir = smb2_mkdir,
5263         .mkdir_setinfo = smb2_mkdir_setinfo,
5264         .rmdir = smb2_rmdir,
5265         .unlink = smb2_unlink,
5266         .rename = smb2_rename_path,
5267         .create_hardlink = smb2_create_hardlink,
5268         .query_symlink = smb2_query_symlink,
5269         .query_mf_symlink = smb3_query_mf_symlink,
5270         .create_mf_symlink = smb3_create_mf_symlink,
5271         .open = smb2_open_file,
5272         .set_fid = smb2_set_fid,
5273         .close = smb2_close_file,
5274         .flush = smb2_flush_file,
5275         .async_readv = smb2_async_readv,
5276         .async_writev = smb2_async_writev,
5277         .sync_read = smb2_sync_read,
5278         .sync_write = smb2_sync_write,
5279         .query_dir_first = smb2_query_dir_first,
5280         .query_dir_next = smb2_query_dir_next,
5281         .close_dir = smb2_close_dir,
5282         .calc_smb_size = smb2_calc_size,
5283         .is_status_pending = smb2_is_status_pending,
5284         .is_session_expired = smb2_is_session_expired,
5285         .oplock_response = smb2_oplock_response,
5286         .queryfs = smb2_queryfs,
5287         .mand_lock = smb2_mand_lock,
5288         .mand_unlock_range = smb2_unlock_range,
5289         .push_mand_locks = smb2_push_mandatory_locks,
5290         .get_lease_key = smb2_get_lease_key,
5291         .set_lease_key = smb2_set_lease_key,
5292         .new_lease_key = smb2_new_lease_key,
5293         .calc_signature = smb2_calc_signature,
5294         .is_read_op = smb21_is_read_op,
5295         .set_oplock_level = smb21_set_oplock_level,
5296         .create_lease_buf = smb2_create_lease_buf,
5297         .parse_lease_buf = smb2_parse_lease_buf,
5298         .copychunk_range = smb2_copychunk_range,
5299         .wp_retry_size = smb2_wp_retry_size,
5300         .dir_needs_close = smb2_dir_needs_close,
5301         .enum_snapshots = smb3_enum_snapshots,
5302         .notify = smb3_notify,
5303         .get_dfs_refer = smb2_get_dfs_refer,
5304         .select_sectype = smb2_select_sectype,
5305 #ifdef CONFIG_CIFS_XATTR
5306         .query_all_EAs = smb2_query_eas,
5307         .set_EA = smb2_set_ea,
5308 #endif /* CIFS_XATTR */
5309         .get_acl = get_smb2_acl,
5310         .get_acl_by_fid = get_smb2_acl_by_fid,
5311         .set_acl = set_smb2_acl,
5312         .next_header = smb2_next_header,
5313         .ioctl_query_info = smb2_ioctl_query_info,
5314         .make_node = smb2_make_node,
5315         .fiemap = smb3_fiemap,
5316         .llseek = smb3_llseek,
5317         .is_status_io_timeout = smb2_is_status_io_timeout,
5318 };
5319
5320 struct smb_version_operations smb30_operations = {
5321         .compare_fids = smb2_compare_fids,
5322         .setup_request = smb2_setup_request,
5323         .setup_async_request = smb2_setup_async_request,
5324         .check_receive = smb2_check_receive,
5325         .add_credits = smb2_add_credits,
5326         .set_credits = smb2_set_credits,
5327         .get_credits_field = smb2_get_credits_field,
5328         .get_credits = smb2_get_credits,
5329         .wait_mtu_credits = smb2_wait_mtu_credits,
5330         .adjust_credits = smb2_adjust_credits,
5331         .get_next_mid = smb2_get_next_mid,
5332         .revert_current_mid = smb2_revert_current_mid,
5333         .read_data_offset = smb2_read_data_offset,
5334         .read_data_length = smb2_read_data_length,
5335         .map_error = map_smb2_to_linux_error,
5336         .find_mid = smb2_find_mid,
5337         .check_message = smb2_check_message,
5338         .dump_detail = smb2_dump_detail,
5339         .clear_stats = smb2_clear_stats,
5340         .print_stats = smb2_print_stats,
5341         .dump_share_caps = smb2_dump_share_caps,
5342         .is_oplock_break = smb2_is_valid_oplock_break,
5343         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5344         .downgrade_oplock = smb3_downgrade_oplock,
5345         .need_neg = smb2_need_neg,
5346         .negotiate = smb2_negotiate,
5347         .negotiate_wsize = smb3_negotiate_wsize,
5348         .negotiate_rsize = smb3_negotiate_rsize,
5349         .sess_setup = SMB2_sess_setup,
5350         .logoff = SMB2_logoff,
5351         .tree_connect = SMB2_tcon,
5352         .tree_disconnect = SMB2_tdis,
5353         .qfs_tcon = smb3_qfs_tcon,
5354         .is_path_accessible = smb2_is_path_accessible,
5355         .can_echo = smb2_can_echo,
5356         .echo = SMB2_echo,
5357         .query_path_info = smb2_query_path_info,
5358         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5359         .query_reparse_tag = smb2_query_reparse_tag,
5360         .get_srv_inum = smb2_get_srv_inum,
5361         .query_file_info = smb2_query_file_info,
5362         .set_path_size = smb2_set_path_size,
5363         .set_file_size = smb2_set_file_size,
5364         .set_file_info = smb2_set_file_info,
5365         .set_compression = smb2_set_compression,
5366         .mkdir = smb2_mkdir,
5367         .mkdir_setinfo = smb2_mkdir_setinfo,
5368         .rmdir = smb2_rmdir,
5369         .unlink = smb2_unlink,
5370         .rename = smb2_rename_path,
5371         .create_hardlink = smb2_create_hardlink,
5372         .query_symlink = smb2_query_symlink,
5373         .query_mf_symlink = smb3_query_mf_symlink,
5374         .create_mf_symlink = smb3_create_mf_symlink,
5375         .open = smb2_open_file,
5376         .set_fid = smb2_set_fid,
5377         .close = smb2_close_file,
5378         .close_getattr = smb2_close_getattr,
5379         .flush = smb2_flush_file,
5380         .async_readv = smb2_async_readv,
5381         .async_writev = smb2_async_writev,
5382         .sync_read = smb2_sync_read,
5383         .sync_write = smb2_sync_write,
5384         .query_dir_first = smb2_query_dir_first,
5385         .query_dir_next = smb2_query_dir_next,
5386         .close_dir = smb2_close_dir,
5387         .calc_smb_size = smb2_calc_size,
5388         .is_status_pending = smb2_is_status_pending,
5389         .is_session_expired = smb2_is_session_expired,
5390         .oplock_response = smb2_oplock_response,
5391         .queryfs = smb2_queryfs,
5392         .mand_lock = smb2_mand_lock,
5393         .mand_unlock_range = smb2_unlock_range,
5394         .push_mand_locks = smb2_push_mandatory_locks,
5395         .get_lease_key = smb2_get_lease_key,
5396         .set_lease_key = smb2_set_lease_key,
5397         .new_lease_key = smb2_new_lease_key,
5398         .generate_signingkey = generate_smb30signingkey,
5399         .calc_signature = smb3_calc_signature,
5400         .set_integrity  = smb3_set_integrity,
5401         .is_read_op = smb21_is_read_op,
5402         .set_oplock_level = smb3_set_oplock_level,
5403         .create_lease_buf = smb3_create_lease_buf,
5404         .parse_lease_buf = smb3_parse_lease_buf,
5405         .copychunk_range = smb2_copychunk_range,
5406         .duplicate_extents = smb2_duplicate_extents,
5407         .validate_negotiate = smb3_validate_negotiate,
5408         .wp_retry_size = smb2_wp_retry_size,
5409         .dir_needs_close = smb2_dir_needs_close,
5410         .fallocate = smb3_fallocate,
5411         .enum_snapshots = smb3_enum_snapshots,
5412         .notify = smb3_notify,
5413         .init_transform_rq = smb3_init_transform_rq,
5414         .is_transform_hdr = smb3_is_transform_hdr,
5415         .receive_transform = smb3_receive_transform,
5416         .get_dfs_refer = smb2_get_dfs_refer,
5417         .select_sectype = smb2_select_sectype,
5418 #ifdef CONFIG_CIFS_XATTR
5419         .query_all_EAs = smb2_query_eas,
5420         .set_EA = smb2_set_ea,
5421 #endif /* CIFS_XATTR */
5422         .get_acl = get_smb2_acl,
5423         .get_acl_by_fid = get_smb2_acl_by_fid,
5424         .set_acl = set_smb2_acl,
5425         .next_header = smb2_next_header,
5426         .ioctl_query_info = smb2_ioctl_query_info,
5427         .make_node = smb2_make_node,
5428         .fiemap = smb3_fiemap,
5429         .llseek = smb3_llseek,
5430         .is_status_io_timeout = smb2_is_status_io_timeout,
5431 };
5432
5433 struct smb_version_operations smb311_operations = {
5434         .compare_fids = smb2_compare_fids,
5435         .setup_request = smb2_setup_request,
5436         .setup_async_request = smb2_setup_async_request,
5437         .check_receive = smb2_check_receive,
5438         .add_credits = smb2_add_credits,
5439         .set_credits = smb2_set_credits,
5440         .get_credits_field = smb2_get_credits_field,
5441         .get_credits = smb2_get_credits,
5442         .wait_mtu_credits = smb2_wait_mtu_credits,
5443         .adjust_credits = smb2_adjust_credits,
5444         .get_next_mid = smb2_get_next_mid,
5445         .revert_current_mid = smb2_revert_current_mid,
5446         .read_data_offset = smb2_read_data_offset,
5447         .read_data_length = smb2_read_data_length,
5448         .map_error = map_smb2_to_linux_error,
5449         .find_mid = smb2_find_mid,
5450         .check_message = smb2_check_message,
5451         .dump_detail = smb2_dump_detail,
5452         .clear_stats = smb2_clear_stats,
5453         .print_stats = smb2_print_stats,
5454         .dump_share_caps = smb2_dump_share_caps,
5455         .is_oplock_break = smb2_is_valid_oplock_break,
5456         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5457         .downgrade_oplock = smb3_downgrade_oplock,
5458         .need_neg = smb2_need_neg,
5459         .negotiate = smb2_negotiate,
5460         .negotiate_wsize = smb3_negotiate_wsize,
5461         .negotiate_rsize = smb3_negotiate_rsize,
5462         .sess_setup = SMB2_sess_setup,
5463         .logoff = SMB2_logoff,
5464         .tree_connect = SMB2_tcon,
5465         .tree_disconnect = SMB2_tdis,
5466         .qfs_tcon = smb3_qfs_tcon,
5467         .is_path_accessible = smb2_is_path_accessible,
5468         .can_echo = smb2_can_echo,
5469         .echo = SMB2_echo,
5470         .query_path_info = smb2_query_path_info,
5471         .query_reparse_tag = smb2_query_reparse_tag,
5472         .get_srv_inum = smb2_get_srv_inum,
5473         .query_file_info = smb2_query_file_info,
5474         .set_path_size = smb2_set_path_size,
5475         .set_file_size = smb2_set_file_size,
5476         .set_file_info = smb2_set_file_info,
5477         .set_compression = smb2_set_compression,
5478         .mkdir = smb2_mkdir,
5479         .mkdir_setinfo = smb2_mkdir_setinfo,
5480         .posix_mkdir = smb311_posix_mkdir,
5481         .rmdir = smb2_rmdir,
5482         .unlink = smb2_unlink,
5483         .rename = smb2_rename_path,
5484         .create_hardlink = smb2_create_hardlink,
5485         .query_symlink = smb2_query_symlink,
5486         .query_mf_symlink = smb3_query_mf_symlink,
5487         .create_mf_symlink = smb3_create_mf_symlink,
5488         .open = smb2_open_file,
5489         .set_fid = smb2_set_fid,
5490         .close = smb2_close_file,
5491         .close_getattr = smb2_close_getattr,
5492         .flush = smb2_flush_file,
5493         .async_readv = smb2_async_readv,
5494         .async_writev = smb2_async_writev,
5495         .sync_read = smb2_sync_read,
5496         .sync_write = smb2_sync_write,
5497         .query_dir_first = smb2_query_dir_first,
5498         .query_dir_next = smb2_query_dir_next,
5499         .close_dir = smb2_close_dir,
5500         .calc_smb_size = smb2_calc_size,
5501         .is_status_pending = smb2_is_status_pending,
5502         .is_session_expired = smb2_is_session_expired,
5503         .oplock_response = smb2_oplock_response,
5504         .queryfs = smb311_queryfs,
5505         .mand_lock = smb2_mand_lock,
5506         .mand_unlock_range = smb2_unlock_range,
5507         .push_mand_locks = smb2_push_mandatory_locks,
5508         .get_lease_key = smb2_get_lease_key,
5509         .set_lease_key = smb2_set_lease_key,
5510         .new_lease_key = smb2_new_lease_key,
5511         .generate_signingkey = generate_smb311signingkey,
5512         .calc_signature = smb3_calc_signature,
5513         .set_integrity  = smb3_set_integrity,
5514         .is_read_op = smb21_is_read_op,
5515         .set_oplock_level = smb3_set_oplock_level,
5516         .create_lease_buf = smb3_create_lease_buf,
5517         .parse_lease_buf = smb3_parse_lease_buf,
5518         .copychunk_range = smb2_copychunk_range,
5519         .duplicate_extents = smb2_duplicate_extents,
5520 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5521         .wp_retry_size = smb2_wp_retry_size,
5522         .dir_needs_close = smb2_dir_needs_close,
5523         .fallocate = smb3_fallocate,
5524         .enum_snapshots = smb3_enum_snapshots,
5525         .notify = smb3_notify,
5526         .init_transform_rq = smb3_init_transform_rq,
5527         .is_transform_hdr = smb3_is_transform_hdr,
5528         .receive_transform = smb3_receive_transform,
5529         .get_dfs_refer = smb2_get_dfs_refer,
5530         .select_sectype = smb2_select_sectype,
5531 #ifdef CONFIG_CIFS_XATTR
5532         .query_all_EAs = smb2_query_eas,
5533         .set_EA = smb2_set_ea,
5534 #endif /* CIFS_XATTR */
5535         .get_acl = get_smb2_acl,
5536         .get_acl_by_fid = get_smb2_acl_by_fid,
5537         .set_acl = set_smb2_acl,
5538         .next_header = smb2_next_header,
5539         .ioctl_query_info = smb2_ioctl_query_info,
5540         .make_node = smb2_make_node,
5541         .fiemap = smb3_fiemap,
5542         .llseek = smb3_llseek,
5543         .is_status_io_timeout = smb2_is_status_io_timeout,
5544 };
5545
5546 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5547 struct smb_version_values smb20_values = {
5548         .version_string = SMB20_VERSION_STRING,
5549         .protocol_id = SMB20_PROT_ID,
5550         .req_capabilities = 0, /* MBZ */
5551         .large_lock_type = 0,
5552         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5553         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5554         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5555         .header_size = sizeof(struct smb2_sync_hdr),
5556         .header_preamble_size = 0,
5557         .max_header_size = MAX_SMB2_HDR_SIZE,
5558         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5559         .lock_cmd = SMB2_LOCK,
5560         .cap_unix = 0,
5561         .cap_nt_find = SMB2_NT_FIND,
5562         .cap_large_files = SMB2_LARGE_FILES,
5563         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5564         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5565         .create_lease_size = sizeof(struct create_lease),
5566 };
5567 #endif /* ALLOW_INSECURE_LEGACY */
5568
5569 struct smb_version_values smb21_values = {
5570         .version_string = SMB21_VERSION_STRING,
5571         .protocol_id = SMB21_PROT_ID,
5572         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5573         .large_lock_type = 0,
5574         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5575         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5576         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5577         .header_size = sizeof(struct smb2_sync_hdr),
5578         .header_preamble_size = 0,
5579         .max_header_size = MAX_SMB2_HDR_SIZE,
5580         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5581         .lock_cmd = SMB2_LOCK,
5582         .cap_unix = 0,
5583         .cap_nt_find = SMB2_NT_FIND,
5584         .cap_large_files = SMB2_LARGE_FILES,
5585         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5586         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5587         .create_lease_size = sizeof(struct create_lease),
5588 };
5589
5590 struct smb_version_values smb3any_values = {
5591         .version_string = SMB3ANY_VERSION_STRING,
5592         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5593         .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,
5594         .large_lock_type = 0,
5595         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5596         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5597         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5598         .header_size = sizeof(struct smb2_sync_hdr),
5599         .header_preamble_size = 0,
5600         .max_header_size = MAX_SMB2_HDR_SIZE,
5601         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5602         .lock_cmd = SMB2_LOCK,
5603         .cap_unix = 0,
5604         .cap_nt_find = SMB2_NT_FIND,
5605         .cap_large_files = SMB2_LARGE_FILES,
5606         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5607         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5608         .create_lease_size = sizeof(struct create_lease_v2),
5609 };
5610
5611 struct smb_version_values smbdefault_values = {
5612         .version_string = SMBDEFAULT_VERSION_STRING,
5613         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5614         .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,
5615         .large_lock_type = 0,
5616         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5617         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5618         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5619         .header_size = sizeof(struct smb2_sync_hdr),
5620         .header_preamble_size = 0,
5621         .max_header_size = MAX_SMB2_HDR_SIZE,
5622         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5623         .lock_cmd = SMB2_LOCK,
5624         .cap_unix = 0,
5625         .cap_nt_find = SMB2_NT_FIND,
5626         .cap_large_files = SMB2_LARGE_FILES,
5627         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5628         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5629         .create_lease_size = sizeof(struct create_lease_v2),
5630 };
5631
5632 struct smb_version_values smb30_values = {
5633         .version_string = SMB30_VERSION_STRING,
5634         .protocol_id = SMB30_PROT_ID,
5635         .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,
5636         .large_lock_type = 0,
5637         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5638         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5639         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5640         .header_size = sizeof(struct smb2_sync_hdr),
5641         .header_preamble_size = 0,
5642         .max_header_size = MAX_SMB2_HDR_SIZE,
5643         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5644         .lock_cmd = SMB2_LOCK,
5645         .cap_unix = 0,
5646         .cap_nt_find = SMB2_NT_FIND,
5647         .cap_large_files = SMB2_LARGE_FILES,
5648         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5649         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5650         .create_lease_size = sizeof(struct create_lease_v2),
5651 };
5652
5653 struct smb_version_values smb302_values = {
5654         .version_string = SMB302_VERSION_STRING,
5655         .protocol_id = SMB302_PROT_ID,
5656         .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,
5657         .large_lock_type = 0,
5658         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5659         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5660         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5661         .header_size = sizeof(struct smb2_sync_hdr),
5662         .header_preamble_size = 0,
5663         .max_header_size = MAX_SMB2_HDR_SIZE,
5664         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5665         .lock_cmd = SMB2_LOCK,
5666         .cap_unix = 0,
5667         .cap_nt_find = SMB2_NT_FIND,
5668         .cap_large_files = SMB2_LARGE_FILES,
5669         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5670         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5671         .create_lease_size = sizeof(struct create_lease_v2),
5672 };
5673
5674 struct smb_version_values smb311_values = {
5675         .version_string = SMB311_VERSION_STRING,
5676         .protocol_id = SMB311_PROT_ID,
5677         .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,
5678         .large_lock_type = 0,
5679         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5680         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5681         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5682         .header_size = sizeof(struct smb2_sync_hdr),
5683         .header_preamble_size = 0,
5684         .max_header_size = MAX_SMB2_HDR_SIZE,
5685         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5686         .lock_cmd = SMB2_LOCK,
5687         .cap_unix = 0,
5688         .cap_nt_find = SMB2_NT_FIND,
5689         .cap_large_files = SMB2_LARGE_FILES,
5690         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5691         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5692         .create_lease_size = sizeof(struct create_lease_v2),
5693 };