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 #include "fs_context.h"
  28
  29 /* Change credits for different ops and return the total number of credits */
  30 static int
  31 change_conf(struct TCP_Server_Info *server)
  32 {
  33         server->credits += server->echo_credits + server->oplock_credits;
  34         server->oplock_credits = server->echo_credits = 0;
  35         switch (server->credits) {
  36         case 0:
  37                 return 0;
  38         case 1:
  39                 server->echoes = false;
  40                 server->oplocks = false;
  41                 break;
  42         case 2:
  43                 server->echoes = true;
  44                 server->oplocks = false;
  45                 server->echo_credits = 1;
  46                 break;
  47         default:
  48                 server->echoes = true;
  49                 if (enable_oplocks) {
  50                         server->oplocks = true;
  51                         server->oplock_credits = 1;
  52                 } else
  53                         server->oplocks = false;
  54
  55                 server->echo_credits = 1;
  56         }
  57         server->credits -= server->echo_credits + server->oplock_credits;
  58         return server->credits + server->echo_credits + server->oplock_credits;
  59 }
  60
  61 static void
  62 smb2_add_credits(struct TCP_Server_Info *server,
  63                  const struct cifs_credits *credits, const int optype)
  64 {
  65         int *val, rc = -1;
  66         int scredits, in_flight;
  67         unsigned int add = credits->value;
  68         unsigned int instance = credits->instance;
  69         bool reconnect_detected = false;
  70         bool reconnect_with_invalid_credits = false;
  71
  72         spin_lock(&server->req_lock);
  73         val = server->ops->get_credits_field(server, optype);
  74
  75         /* eg found case where write overlapping reconnect messed up credits */
  76         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  77                 reconnect_with_invalid_credits = true;
  78
  79         if ((instance == 0) || (instance == server->reconnect_instance))
  80                 *val += add;
  81         else
  82                 reconnect_detected = true;
  83
  84         if (*val > 65000) {
  85                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  86                 pr_warn_once("server overflowed SMB3 credits\n");
  87         }
  88         server->in_flight--;
  89         if (server->in_flight == 0 &&
  90            ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
  91            ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
  92                 rc = change_conf(server);
  93         /*
  94          * Sometimes server returns 0 credits on oplock break ack - we need to
  95          * rebalance credits in this case.
  96          */
  97         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  98                  server->oplocks) {
  99                 if (server->credits > 1) {
 100                         server->credits--;
 101                         server->oplock_credits++;
 102                 }
 103         }
 104         scredits = *val;
 105         in_flight = server->in_flight;
 106         spin_unlock(&server->req_lock);
 107         wake_up(&server->request_q);
 108
 109         if (reconnect_detected) {
 110                 trace_smb3_reconnect_detected(server->CurrentMid,
 111                         server->conn_id, server->hostname, scredits, add, in_flight);
 112
 113                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 114                          add, instance);
 115         }
 116
 117         if (reconnect_with_invalid_credits) {
 118                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
 119                         server->conn_id, server->hostname, scredits, add, in_flight);
 120                 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
 121                          optype, scredits, add);
 122         }
 123
 124         if (server->tcpStatus == CifsNeedReconnect
 125             || server->tcpStatus == CifsExiting)
 126                 return;
 127
 128         switch (rc) {
 129         case -1:
 130                 /* change_conf hasn't been executed */
 131                 break;
 132         case 0:
 133                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 134                 break;
 135         case 1:
 136                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 137                 break;
 138         case 2:
 139                 cifs_dbg(FYI, "disabling oplocks\n");
 140                 break;
 141         default:
 142                 /* change_conf rebalanced credits for different types */
 143                 break;
 144         }
 145
 146         trace_smb3_add_credits(server->CurrentMid,
 147                         server->conn_id, server->hostname, scredits, add, in_flight);
 148         cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
 149 }
 150
 151 static void
 152 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 153 {
 154         int scredits, in_flight;
 155
 156         spin_lock(&server->req_lock);
 157         server->credits = val;
 158         if (val == 1)
 159                 server->reconnect_instance++;
 160         scredits = server->credits;
 161         in_flight = server->in_flight;
 162         spin_unlock(&server->req_lock);
 163
 164         trace_smb3_set_credits(server->CurrentMid,
 165                         server->conn_id, server->hostname, scredits, val, in_flight);
 166         cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
 167
 168         /* don't log while holding the lock */
 169         if (val == 1)
 170                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 171 }
 172
 173 static int *
 174 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 175 {
 176         switch (optype) {
 177         case CIFS_ECHO_OP:
 178                 return &server->echo_credits;
 179         case CIFS_OBREAK_OP:
 180                 return &server->oplock_credits;
 181         default:
 182                 return &server->credits;
 183         }
 184 }
 185
 186 static unsigned int
 187 smb2_get_credits(struct mid_q_entry *mid)
 188 {
 189         return mid->credits_received;
 190 }
 191
 192 static int
 193 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 194                       unsigned int *num, struct cifs_credits *credits)
 195 {
 196         int rc = 0;
 197         unsigned int scredits, in_flight;
 198
 199         spin_lock(&server->req_lock);
 200         while (1) {
 201                 if (server->credits <= 0) {
 202                         spin_unlock(&server->req_lock);
 203                         cifs_num_waiters_inc(server);
 204                         rc = wait_event_killable(server->request_q,
 205                                 has_credits(server, &server->credits, 1));
 206                         cifs_num_waiters_dec(server);
 207                         if (rc)
 208                                 return rc;
 209                         spin_lock(&server->req_lock);
 210                 } else {
 211                         if (server->tcpStatus == CifsExiting) {
 212                                 spin_unlock(&server->req_lock);
 213                                 return -ENOENT;
 214                         }
 215
 216                         scredits = server->credits;
 217                         /* can deadlock with reopen */
 218                         if (scredits <= 8) {
 219                                 *num = SMB2_MAX_BUFFER_SIZE;
 220                                 credits->value = 0;
 221                                 credits->instance = 0;
 222                                 break;
 223                         }
 224
 225                         /* leave some credits for reopen and other ops */
 226                         scredits -= 8;
 227                         *num = min_t(unsigned int, size,
 228                                      scredits * SMB2_MAX_BUFFER_SIZE);
 229
 230                         credits->value =
 231                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 232                         credits->instance = server->reconnect_instance;
 233                         server->credits -= credits->value;
 234                         server->in_flight++;
 235                         if (server->in_flight > server->max_in_flight)
 236                                 server->max_in_flight = server->in_flight;
 237                         break;
 238                 }
 239         }
 240         scredits = server->credits;
 241         in_flight = server->in_flight;
 242         spin_unlock(&server->req_lock);
 243
 244         trace_smb3_add_credits(server->CurrentMid,
 245                         server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
 246         cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
 247                         __func__, credits->value, scredits);
 248
 249         return rc;
 250 }
 251
 252 static int
 253 smb2_adjust_credits(struct TCP_Server_Info *server,
 254                     struct cifs_credits *credits,
 255                     const unsigned int payload_size)
 256 {
 257         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 258         int scredits, in_flight;
 259
 260         if (!credits->value || credits->value == new_val)
 261                 return 0;
 262
 263         if (credits->value < new_val) {
 264                 trace_smb3_too_many_credits(server->CurrentMid,
 265                                 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
 266                 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
 267                                 credits->value, new_val);
 268
 269                 return -ENOTSUPP;
 270         }
 271
 272         spin_lock(&server->req_lock);
 273
 274         if (server->reconnect_instance != credits->instance) {
 275                 scredits = server->credits;
 276                 in_flight = server->in_flight;
 277                 spin_unlock(&server->req_lock);
 278
 279                 trace_smb3_reconnect_detected(server->CurrentMid,
 280                         server->conn_id, server->hostname, scredits,
 281                         credits->value - new_val, in_flight);
 282                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 283                          credits->value - new_val);
 284                 return -EAGAIN;
 285         }
 286
 287         server->credits += credits->value - new_val;
 288         scredits = server->credits;
 289         in_flight = server->in_flight;
 290         spin_unlock(&server->req_lock);
 291         wake_up(&server->request_q);
 292
 293         trace_smb3_add_credits(server->CurrentMid,
 294                         server->conn_id, server->hostname, scredits,
 295                         credits->value - new_val, in_flight);
 296         cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
 297                         __func__, credits->value - new_val, scredits);
 298
 299         credits->value = new_val;
 300
 301         return 0;
 302 }
 303
 304 static __u64
 305 smb2_get_next_mid(struct TCP_Server_Info *server)
 306 {
 307         __u64 mid;
 308         /* for SMB2 we need the current value */
 309         spin_lock(&GlobalMid_Lock);
 310         mid = server->CurrentMid++;
 311         spin_unlock(&GlobalMid_Lock);
 312         return mid;
 313 }
 314
 315 static void
 316 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 317 {
 318         spin_lock(&GlobalMid_Lock);
 319         if (server->CurrentMid >= val)
 320                 server->CurrentMid -= val;
 321         spin_unlock(&GlobalMid_Lock);
 322 }
 323
 324 static struct mid_q_entry *
 325 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 326 {
 327         struct mid_q_entry *mid;
 328         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 329         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 330
 331         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 332                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 333                 return NULL;
 334         }
 335
 336         spin_lock(&GlobalMid_Lock);
 337         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 338                 if ((mid->mid == wire_mid) &&
 339                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 340                     (mid->command == shdr->Command)) {
 341                         kref_get(&mid->refcount);
 342                         if (dequeue) {
 343                                 list_del_init(&mid->qhead);
 344                                 mid->mid_flags |= MID_DELETED;
 345                         }
 346                         spin_unlock(&GlobalMid_Lock);
 347                         return mid;
 348                 }
 349         }
 350         spin_unlock(&GlobalMid_Lock);
 351         return NULL;
 352 }
 353
 354 static struct mid_q_entry *
 355 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 356 {
 357         return __smb2_find_mid(server, buf, false);
 358 }
 359
 360 static struct mid_q_entry *
 361 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
 362 {
 363         return __smb2_find_mid(server, buf, true);
 364 }
 365
 366 static void
 367 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 368 {
 369 #ifdef CONFIG_CIFS_DEBUG2
 370         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 371
 372         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 373                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 374                  shdr->ProcessId);
 375         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 376                  server->ops->calc_smb_size(buf, server));
 377 #endif
 378 }
 379
 380 static bool
 381 smb2_need_neg(struct TCP_Server_Info *server)
 382 {
 383         return server->max_read == 0;
 384 }
 385
 386 static int
 387 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 388 {
 389         int rc;
 390
 391         cifs_ses_server(ses)->CurrentMid = 0;
 392         rc = SMB2_negotiate(xid, ses);
 393         /* BB we probably don't need to retry with modern servers */
 394         if (rc == -EAGAIN)
 395                 rc = -EHOSTDOWN;
 396         return rc;
 397 }
 398
 399 static unsigned int
 400 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 401 {
 402         struct TCP_Server_Info *server = tcon->ses->server;
 403         unsigned int wsize;
 404
 405         /* start with specified wsize, or default */
 406         wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
 407         wsize = min_t(unsigned int, wsize, server->max_write);
 408         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 409                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 410
 411         return wsize;
 412 }
 413
 414 static unsigned int
 415 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 416 {
 417         struct TCP_Server_Info *server = tcon->ses->server;
 418         unsigned int wsize;
 419
 420         /* start with specified wsize, or default */
 421         wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
 422         wsize = min_t(unsigned int, wsize, server->max_write);
 423 #ifdef CONFIG_CIFS_SMB_DIRECT
 424         if (server->rdma) {
 425                 if (server->sign)
 426                         /*
 427                          * Account for SMB2 data transfer packet header and
 428                          * possible encryption header
 429                          */
 430                         wsize = min_t(unsigned int,
 431                                 wsize,
 432                                 server->smbd_conn->max_fragmented_send_size -
 433                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 434                                         sizeof(struct smb2_transform_hdr));
 435                 else
 436                         wsize = min_t(unsigned int,
 437                                 wsize, server->smbd_conn->max_readwrite_size);
 438         }
 439 #endif
 440         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 441                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 442
 443         return wsize;
 444 }
 445
 446 static unsigned int
 447 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 448 {
 449         struct TCP_Server_Info *server = tcon->ses->server;
 450         unsigned int rsize;
 451
 452         /* start with specified rsize, or default */
 453         rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
 454         rsize = min_t(unsigned int, rsize, server->max_read);
 455
 456         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 457                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 458
 459         return rsize;
 460 }
 461
 462 static unsigned int
 463 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 464 {
 465         struct TCP_Server_Info *server = tcon->ses->server;
 466         unsigned int rsize;
 467
 468         /* start with specified rsize, or default */
 469         rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
 470         rsize = min_t(unsigned int, rsize, server->max_read);
 471 #ifdef CONFIG_CIFS_SMB_DIRECT
 472         if (server->rdma) {
 473                 if (server->sign)
 474                         /*
 475                          * Account for SMB2 data transfer packet header and
 476                          * possible encryption header
 477                          */
 478                         rsize = min_t(unsigned int,
 479                                 rsize,
 480                                 server->smbd_conn->max_fragmented_recv_size -
 481                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 482                                         sizeof(struct smb2_transform_hdr));
 483                 else
 484                         rsize = min_t(unsigned int,
 485                                 rsize, server->smbd_conn->max_readwrite_size);
 486         }
 487 #endif
 488
 489         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 490                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 491
 492         return rsize;
 493 }
 494
 495 static int
 496 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 497                         size_t buf_len,
 498                         struct cifs_server_iface **iface_list,
 499                         size_t *iface_count)
 500 {
 501         struct network_interface_info_ioctl_rsp *p;
 502         struct sockaddr_in *addr4;
 503         struct sockaddr_in6 *addr6;
 504         struct iface_info_ipv4 *p4;
 505         struct iface_info_ipv6 *p6;
 506         struct cifs_server_iface *info;
 507         ssize_t bytes_left;
 508         size_t next = 0;
 509         int nb_iface = 0;
 510         int rc = 0;
 511
 512         *iface_list = NULL;
 513         *iface_count = 0;
 514
 515         /*
 516          * Fist pass: count and sanity check
 517          */
 518
 519         bytes_left = buf_len;
 520         p = buf;
 521         while (bytes_left >= sizeof(*p)) {
 522                 nb_iface++;
 523                 next = le32_to_cpu(p->Next);
 524                 if (!next) {
 525                         bytes_left -= sizeof(*p);
 526                         break;
 527                 }
 528                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 529                 bytes_left -= next;
 530         }
 531
 532         if (!nb_iface) {
 533                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 534                 rc = -EINVAL;
 535                 goto out;
 536         }
 537
 538         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 539         if ((bytes_left > 8) || p->Next)
 540                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 541
 542
 543         /*
 544          * Second pass: extract info to internal structure
 545          */
 546
 547         *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
 548         if (!*iface_list) {
 549                 rc = -ENOMEM;
 550                 goto out;
 551         }
 552
 553         info = *iface_list;
 554         bytes_left = buf_len;
 555         p = buf;
 556         while (bytes_left >= sizeof(*p)) {
 557                 info->speed = le64_to_cpu(p->LinkSpeed);
 558                 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 559                 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 560
 561                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 562                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 563                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 564                          le32_to_cpu(p->Capability));
 565
 566                 switch (p->Family) {
 567                 /*
 568                  * The kernel and wire socket structures have the same
 569                  * layout and use network byte order but make the
 570                  * conversion explicit in case either one changes.
 571                  */
 572                 case INTERNETWORK:
 573                         addr4 = (struct sockaddr_in *)&info->sockaddr;
 574                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 575                         addr4->sin_family = AF_INET;
 576                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 577
 578                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 579                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 580
 581                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 582                                  &addr4->sin_addr);
 583                         break;
 584                 case INTERNETWORKV6:
 585                         addr6 = (struct sockaddr_in6 *)&info->sockaddr;
 586                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 587                         addr6->sin6_family = AF_INET6;
 588                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 589
 590                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 591                         addr6->sin6_flowinfo = 0;
 592                         addr6->sin6_scope_id = 0;
 593                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 594
 595                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 596                                  &addr6->sin6_addr);
 597                         break;
 598                 default:
 599                         cifs_dbg(VFS,
 600                                  "%s: skipping unsupported socket family\n",
 601                                  __func__);
 602                         goto next_iface;
 603                 }
 604
 605                 (*iface_count)++;
 606                 info++;
 607 next_iface:
 608                 next = le32_to_cpu(p->Next);
 609                 if (!next)
 610                         break;
 611                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 612                 bytes_left -= next;
 613         }
 614
 615         if (!*iface_count) {
 616                 rc = -EINVAL;
 617                 goto out;
 618         }
 619
 620 out:
 621         if (rc) {
 622                 kfree(*iface_list);
 623                 *iface_count = 0;
 624                 *iface_list = NULL;
 625         }
 626         return rc;
 627 }
 628
 629 static int compare_iface(const void *ia, const void *ib)
 630 {
 631         const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
 632         const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
 633
 634         return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
 635 }
 636
 637 static int
 638 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 639 {
 640         int rc;
 641         unsigned int ret_data_len = 0;
 642         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 643         struct cifs_server_iface *iface_list;
 644         size_t iface_count;
 645         struct cifs_ses *ses = tcon->ses;
 646
 647         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 648                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 649                         NULL /* no data input */, 0 /* no data input */,
 650                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 651         if (rc == -EOPNOTSUPP) {
 652                 cifs_dbg(FYI,
 653                          "server does not support query network interfaces\n");
 654                 goto out;
 655         } else if (rc != 0) {
 656                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 657                 goto out;
 658         }
 659
 660         rc = parse_server_interfaces(out_buf, ret_data_len,
 661                                      &iface_list, &iface_count);
 662         if (rc)
 663                 goto out;
 664
 665         /* sort interfaces from fastest to slowest */
 666         sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
 667
 668         spin_lock(&ses->iface_lock);
 669         kfree(ses->iface_list);
 670         ses->iface_list = iface_list;
 671         ses->iface_count = iface_count;
 672         ses->iface_last_update = jiffies;
 673         spin_unlock(&ses->iface_lock);
 674
 675 out:
 676         kfree(out_buf);
 677         return rc;
 678 }
 679
 680 static void
 681 smb2_close_cached_fid(struct kref *ref)
 682 {
 683         struct cached_fid *cfid = container_of(ref, struct cached_fid,
 684                                                refcount);
 685
 686         if (cfid->is_valid) {
 687                 cifs_dbg(FYI, "clear cached root file handle\n");
 688                 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 689                            cfid->fid->volatile_fid);
 690                 cfid->is_valid = false;
 691                 cfid->file_all_info_is_valid = false;
 692                 cfid->has_lease = false;
 693                 if (cfid->dentry) {
 694                         dput(cfid->dentry);
 695                         cfid->dentry = NULL;
 696                 }
 697         }
 698 }
 699
 700 void close_cached_dir(struct cached_fid *cfid)
 701 {
 702         mutex_lock(&cfid->fid_mutex);
 703         kref_put(&cfid->refcount, smb2_close_cached_fid);
 704         mutex_unlock(&cfid->fid_mutex);
 705 }
 706
 707 void close_cached_dir_lease_locked(struct cached_fid *cfid)
 708 {
 709         if (cfid->has_lease) {
 710                 cfid->has_lease = false;
 711                 kref_put(&cfid->refcount, smb2_close_cached_fid);
 712         }
 713 }
 714
 715 void close_cached_dir_lease(struct cached_fid *cfid)
 716 {
 717         mutex_lock(&cfid->fid_mutex);
 718         close_cached_dir_lease_locked(cfid);
 719         mutex_unlock(&cfid->fid_mutex);
 720 }
 721
 722 void
 723 smb2_cached_lease_break(struct work_struct *work)
 724 {
 725         struct cached_fid *cfid = container_of(work,
 726                                 struct cached_fid, lease_break);
 727
 728         close_cached_dir_lease(cfid);
 729 }
 730
 731 /*
 732  * Open the and cache a directory handle.
 733  * Only supported for the root handle.
 734  */
 735 int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
 736                 const char *path,
 737                 struct cifs_sb_info *cifs_sb,
 738                 struct cached_fid **cfid)
 739 {
 740         struct cifs_ses *ses = tcon->ses;
 741         struct TCP_Server_Info *server = ses->server;
 742         struct cifs_open_parms oparms;
 743         struct smb2_create_rsp *o_rsp = NULL;
 744         struct smb2_query_info_rsp *qi_rsp = NULL;
 745         int resp_buftype[2];
 746         struct smb_rqst rqst[2];
 747         struct kvec rsp_iov[2];
 748         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
 749         struct kvec qi_iov[1];
 750         int rc, flags = 0;
 751         __le16 utf16_path = 0; /* Null - since an open of top of share */
 752         u8 oplock = SMB2_OPLOCK_LEVEL_II;
 753         struct cifs_fid *pfid;
 754         struct dentry *dentry;
 755
 756         if (tcon->nohandlecache)
 757                 return -ENOTSUPP;
 758
 759         if (cifs_sb->root == NULL)
 760                 return -ENOENT;
 761
 762         if (strlen(path))
 763                 return -ENOENT;
 764
 765         dentry = cifs_sb->root;
 766
 767         mutex_lock(&tcon->crfid.fid_mutex);
 768         if (tcon->crfid.is_valid) {
 769                 cifs_dbg(FYI, "found a cached root file handle\n");
 770                 *cfid = &tcon->crfid;
 771                 kref_get(&tcon->crfid.refcount);
 772                 mutex_unlock(&tcon->crfid.fid_mutex);
 773                 return 0;
 774         }
 775
 776         /*
 777          * We do not hold the lock for the open because in case
 778          * SMB2_open needs to reconnect, it will end up calling
 779          * cifs_mark_open_files_invalid() which takes the lock again
 780          * thus causing a deadlock
 781          */
 782
 783         mutex_unlock(&tcon->crfid.fid_mutex);
 784
 785         if (smb3_encryption_required(tcon))
 786                 flags |= CIFS_TRANSFORM_REQ;
 787
 788         if (!server->ops->new_lease_key)
 789                 return -EIO;
 790
 791         pfid = tcon->crfid.fid;
 792         server->ops->new_lease_key(pfid);
 793
 794         memset(rqst, 0, sizeof(rqst));
 795         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
 796         memset(rsp_iov, 0, sizeof(rsp_iov));
 797
 798         /* Open */
 799         memset(&open_iov, 0, sizeof(open_iov));
 800         rqst[0].rq_iov = open_iov;
 801         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
 802
 803         oparms.tcon = tcon;
 804         oparms.create_options = cifs_create_options(cifs_sb, 0);
 805         oparms.desired_access = FILE_READ_ATTRIBUTES;
 806         oparms.disposition = FILE_OPEN;
 807         oparms.fid = pfid;
 808         oparms.reconnect = false;
 809
 810         rc = SMB2_open_init(tcon, server,
 811                             &rqst[0], &oplock, &oparms, &utf16_path);
 812         if (rc)
 813                 goto oshr_free;
 814         smb2_set_next_command(tcon, &rqst[0]);
 815
 816         memset(&qi_iov, 0, sizeof(qi_iov));
 817         rqst[1].rq_iov = qi_iov;
 818         rqst[1].rq_nvec = 1;
 819
 820         rc = SMB2_query_info_init(tcon, server,
 821                                   &rqst[1], COMPOUND_FID,
 822                                   COMPOUND_FID, FILE_ALL_INFORMATION,
 823                                   SMB2_O_INFO_FILE, 0,
 824                                   sizeof(struct smb2_file_all_info) +
 825                                   PATH_MAX * 2, 0, NULL);
 826         if (rc)
 827                 goto oshr_free;
 828
 829         smb2_set_related(&rqst[1]);
 830
 831         rc = compound_send_recv(xid, ses, server,
 832                                 flags, 2, rqst,
 833                                 resp_buftype, rsp_iov);
 834         mutex_lock(&tcon->crfid.fid_mutex);
 835
 836         /*
 837          * Now we need to check again as the cached root might have
 838          * been successfully re-opened from a concurrent process
 839          */
 840
 841         if (tcon->crfid.is_valid) {
 842                 /* work was already done */
 843
 844                 /* stash fids for close() later */
 845                 struct cifs_fid fid = {
 846                         .persistent_fid = pfid->persistent_fid,
 847                         .volatile_fid = pfid->volatile_fid,
 848                 };
 849
 850                 /*
 851                  * caller expects this func to set the fid in crfid to valid
 852                  * cached root, so increment the refcount.
 853                  */
 854                 kref_get(&tcon->crfid.refcount);
 855
 856                 mutex_unlock(&tcon->crfid.fid_mutex);
 857
 858                 if (rc == 0) {
 859                         /* close extra handle outside of crit sec */
 860                         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 861                 }
 862                 rc = 0;
 863                 goto oshr_free;
 864         }
 865
 866         /* Cached root is still invalid, continue normaly */
 867
 868         if (rc) {
 869                 if (rc == -EREMCHG) {
 870                         tcon->need_reconnect = true;
 871                         pr_warn_once("server share %s deleted\n",
 872                                      tcon->treeName);
 873                 }
 874                 goto oshr_exit;
 875         }
 876
 877         atomic_inc(&tcon->num_remote_opens);
 878
 879         o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
 880         oparms.fid->persistent_fid = o_rsp->PersistentFileId;
 881         oparms.fid->volatile_fid = o_rsp->VolatileFileId;
 882 #ifdef CONFIG_CIFS_DEBUG2
 883         oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
 884 #endif /* CIFS_DEBUG2 */
 885
 886         tcon->crfid.tcon = tcon;
 887         tcon->crfid.is_valid = true;
 888         tcon->crfid.dentry = dentry;
 889         dget(dentry);
 890         kref_init(&tcon->crfid.refcount);
 891
 892         /* BB TBD check to see if oplock level check can be removed below */
 893         if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
 894                 /*
 895                  * See commit 2f94a3125b87. Increment the refcount when we
 896                  * get a lease for root, release it if lease break occurs
 897                  */
 898                 kref_get(&tcon->crfid.refcount);
 899                 tcon->crfid.has_lease = true;
 900                 smb2_parse_contexts(server, o_rsp,
 901                                 &oparms.fid->epoch,
 902                                     oparms.fid->lease_key, &oplock,
 903                                     NULL, NULL);
 904         } else
 905                 goto oshr_exit;
 906
 907         qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
 908         if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
 909                 goto oshr_exit;
 910         if (!smb2_validate_and_copy_iov(
 911                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 912                                 sizeof(struct smb2_file_all_info),
 913                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 914                                 (char *)&tcon->crfid.file_all_info))
 915                 tcon->crfid.file_all_info_is_valid = true;
 916         tcon->crfid.time = jiffies;
 917
 918
 919 oshr_exit:
 920         mutex_unlock(&tcon->crfid.fid_mutex);
 921 oshr_free:
 922         SMB2_open_free(&rqst[0]);
 923         SMB2_query_info_free(&rqst[1]);
 924         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 925         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 926         if (rc == 0)
 927                 *cfid = &tcon->crfid;
 928         return rc;
 929 }
 930
 931 int open_cached_dir_by_dentry(struct cifs_tcon *tcon,
 932                               struct dentry *dentry,
 933                               struct cached_fid **cfid)
 934 {
 935         mutex_lock(&tcon->crfid.fid_mutex);
 936         if (tcon->crfid.dentry == dentry) {
 937                 cifs_dbg(FYI, "found a cached root file handle by dentry\n");
 938                 *cfid = &tcon->crfid;
 939                 kref_get(&tcon->crfid.refcount);
 940                 mutex_unlock(&tcon->crfid.fid_mutex);
 941                 return 0;
 942         }
 943         mutex_unlock(&tcon->crfid.fid_mutex);
 944         return -ENOENT;
 945 }
 946
 947 static void
 948 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 949               struct cifs_sb_info *cifs_sb)
 950 {
 951         int rc;
 952         __le16 srch_path = 0; /* Null - open root of share */
 953         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 954         struct cifs_open_parms oparms;
 955         struct cifs_fid fid;
 956         struct cached_fid *cfid = NULL;
 957
 958         oparms.tcon = tcon;
 959         oparms.desired_access = FILE_READ_ATTRIBUTES;
 960         oparms.disposition = FILE_OPEN;
 961         oparms.create_options = cifs_create_options(cifs_sb, 0);
 962         oparms.fid = &fid;
 963         oparms.reconnect = false;
 964
 965         rc = open_cached_dir(xid, tcon, "", cifs_sb, &cfid);
 966         if (rc == 0)
 967                 memcpy(&fid, cfid->fid, sizeof(struct cifs_fid));
 968         else
 969                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 970                                NULL, NULL);
 971         if (rc)
 972                 return;
 973
 974         SMB3_request_interfaces(xid, tcon);
 975
 976         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 977                         FS_ATTRIBUTE_INFORMATION);
 978         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 979                         FS_DEVICE_INFORMATION);
 980         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 981                         FS_VOLUME_INFORMATION);
 982         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 983                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 984         if (cfid == NULL)
 985                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 986         else
 987                 close_cached_dir(cfid);
 988 }
 989
 990 static void
 991 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 992               struct cifs_sb_info *cifs_sb)
 993 {
 994         int rc;
 995         __le16 srch_path = 0; /* Null - open root of share */
 996         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 997         struct cifs_open_parms oparms;
 998         struct cifs_fid fid;
 999
1000         oparms.tcon = tcon;
1001         oparms.desired_access = FILE_READ_ATTRIBUTES;
1002         oparms.disposition = FILE_OPEN;
1003         oparms.create_options = cifs_create_options(cifs_sb, 0);
1004         oparms.fid = &fid;
1005         oparms.reconnect = false;
1006
1007         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
1008                        NULL, NULL);
1009         if (rc)
1010                 return;
1011
1012         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1013                         FS_ATTRIBUTE_INFORMATION);
1014         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1015                         FS_DEVICE_INFORMATION);
1016         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1017 }
1018
1019 static int
1020 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
1021                         struct cifs_sb_info *cifs_sb, const char *full_path)
1022 {
1023         int rc;
1024         __le16 *utf16_path;
1025         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1026         struct cifs_open_parms oparms;
1027         struct cifs_fid fid;
1028
1029         if ((*full_path == 0) && tcon->crfid.is_valid)
1030                 return 0;
1031
1032         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1033         if (!utf16_path)
1034                 return -ENOMEM;
1035
1036         oparms.tcon = tcon;
1037         oparms.desired_access = FILE_READ_ATTRIBUTES;
1038         oparms.disposition = FILE_OPEN;
1039         oparms.create_options = cifs_create_options(cifs_sb, 0);
1040         oparms.fid = &fid;
1041         oparms.reconnect = false;
1042
1043         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
1044                        NULL);
1045         if (rc) {
1046                 kfree(utf16_path);
1047                 return rc;
1048         }
1049
1050         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1051         kfree(utf16_path);
1052         return rc;
1053 }
1054
1055 static int
1056 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
1057                   struct cifs_sb_info *cifs_sb, const char *full_path,
1058                   u64 *uniqueid, FILE_ALL_INFO *data)
1059 {
1060         *uniqueid = le64_to_cpu(data->IndexNumber);
1061         return 0;
1062 }
1063
1064 static int
1065 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
1066                      struct cifs_fid *fid, FILE_ALL_INFO *data)
1067 {
1068         int rc;
1069         struct smb2_file_all_info *smb2_data;
1070
1071         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
1072                             GFP_KERNEL);
1073         if (smb2_data == NULL)
1074                 return -ENOMEM;
1075
1076         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
1077                              smb2_data);
1078         if (!rc)
1079                 move_smb2_info_to_cifs(data, smb2_data);
1080         kfree(smb2_data);
1081         return rc;
1082 }
1083
1084 #ifdef CONFIG_CIFS_XATTR
1085 static ssize_t
1086 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
1087                      struct smb2_file_full_ea_info *src, size_t src_size,
1088                      const unsigned char *ea_name)
1089 {
1090         int rc = 0;
1091         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
1092         char *name, *value;
1093         size_t buf_size = dst_size;
1094         size_t name_len, value_len, user_name_len;
1095
1096         while (src_size > 0) {
1097                 name = &src->ea_data[0];
1098                 name_len = (size_t)src->ea_name_length;
1099                 value = &src->ea_data[src->ea_name_length + 1];
1100                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
1101
1102                 if (name_len == 0)
1103                         break;
1104
1105                 if (src_size < 8 + name_len + 1 + value_len) {
1106                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
1107                         rc = -EIO;
1108                         goto out;
1109                 }
1110
1111                 if (ea_name) {
1112                         if (ea_name_len == name_len &&
1113                             memcmp(ea_name, name, name_len) == 0) {
1114                                 rc = value_len;
1115                                 if (dst_size == 0)
1116                                         goto out;
1117                                 if (dst_size < value_len) {
1118                                         rc = -ERANGE;
1119                                         goto out;
1120                                 }
1121                                 memcpy(dst, value, value_len);
1122                                 goto out;
1123                         }
1124                 } else {
1125                         /* 'user.' plus a terminating null */
1126                         user_name_len = 5 + 1 + name_len;
1127
1128                         if (buf_size == 0) {
1129                                 /* skip copy - calc size only */
1130                                 rc += user_name_len;
1131                         } else if (dst_size >= user_name_len) {
1132                                 dst_size -= user_name_len;
1133                                 memcpy(dst, "user.", 5);
1134                                 dst += 5;
1135                                 memcpy(dst, src->ea_data, name_len);
1136                                 dst += name_len;
1137                                 *dst = 0;
1138                                 ++dst;
1139                                 rc += user_name_len;
1140                         } else {
1141                                 /* stop before overrun buffer */
1142                                 rc = -ERANGE;
1143                                 break;
1144                         }
1145                 }
1146
1147                 if (!src->next_entry_offset)
1148                         break;
1149
1150                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1151                         /* stop before overrun buffer */
1152                         rc = -ERANGE;
1153                         break;
1154                 }
1155                 src_size -= le32_to_cpu(src->next_entry_offset);
1156                 src = (void *)((char *)src +
1157                                le32_to_cpu(src->next_entry_offset));
1158         }
1159
1160         /* didn't find the named attribute */
1161         if (ea_name)
1162                 rc = -ENODATA;
1163
1164 out:
1165         return (ssize_t)rc;
1166 }
1167
1168 static ssize_t
1169 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1170                const unsigned char *path, const unsigned char *ea_name,
1171                char *ea_data, size_t buf_size,
1172                struct cifs_sb_info *cifs_sb)
1173 {
1174         int rc;
1175         __le16 *utf16_path;
1176         struct kvec rsp_iov = {NULL, 0};
1177         int buftype = CIFS_NO_BUFFER;
1178         struct smb2_query_info_rsp *rsp;
1179         struct smb2_file_full_ea_info *info = NULL;
1180
1181         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1182         if (!utf16_path)
1183                 return -ENOMEM;
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, &buftype, cifs_sb);
1193         if (rc) {
1194                 /*
1195                  * If ea_name is NULL (listxattr) and there are no EAs,
1196                  * return 0 as it's not an error. Otherwise, the specified
1197                  * ea_name was not found.
1198                  */
1199                 if (!ea_name && rc == -ENODATA)
1200                         rc = 0;
1201                 goto qeas_exit;
1202         }
1203
1204         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1205         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1206                                le32_to_cpu(rsp->OutputBufferLength),
1207                                &rsp_iov,
1208                                sizeof(struct smb2_file_full_ea_info));
1209         if (rc)
1210                 goto qeas_exit;
1211
1212         info = (struct smb2_file_full_ea_info *)(
1213                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1214         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1215                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1216
1217  qeas_exit:
1218         kfree(utf16_path);
1219         free_rsp_buf(buftype, rsp_iov.iov_base);
1220         return rc;
1221 }
1222
1223
1224 static int
1225 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1226             const char *path, const char *ea_name, const void *ea_value,
1227             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1228             struct cifs_sb_info *cifs_sb)
1229 {
1230         struct cifs_ses *ses = tcon->ses;
1231         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1232         __le16 *utf16_path = NULL;
1233         int ea_name_len = strlen(ea_name);
1234         int flags = CIFS_CP_CREATE_CLOSE_OP;
1235         int len;
1236         struct smb_rqst rqst[3];
1237         int resp_buftype[3];
1238         struct kvec rsp_iov[3];
1239         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1240         struct cifs_open_parms oparms;
1241         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1242         struct cifs_fid fid;
1243         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1244         unsigned int size[1];
1245         void *data[1];
1246         struct smb2_file_full_ea_info *ea = NULL;
1247         struct kvec close_iov[1];
1248         struct smb2_query_info_rsp *rsp;
1249         int rc, used_len = 0;
1250
1251         if (smb3_encryption_required(tcon))
1252                 flags |= CIFS_TRANSFORM_REQ;
1253
1254         if (ea_name_len > 255)
1255                 return -EINVAL;
1256
1257         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1258         if (!utf16_path)
1259                 return -ENOMEM;
1260
1261         memset(rqst, 0, sizeof(rqst));
1262         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1263         memset(rsp_iov, 0, sizeof(rsp_iov));
1264
1265         if (ses->server->ops->query_all_EAs) {
1266                 if (!ea_value) {
1267                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1268                                                              ea_name, NULL, 0,
1269                                                              cifs_sb);
1270                         if (rc == -ENODATA)
1271                                 goto sea_exit;
1272                 } else {
1273                         /* If we are adding a attribute we should first check
1274                          * if there will be enough space available to store
1275                          * the new EA. If not we should not add it since we
1276                          * would not be able to even read the EAs back.
1277                          */
1278                         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1279                                       FILE_READ_EA,
1280                                       FILE_FULL_EA_INFORMATION,
1281                                       SMB2_O_INFO_FILE,
1282                                       CIFSMaxBufSize -
1283                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1284                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1285                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1286                         if (rc == 0) {
1287                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1288                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1289                         }
1290                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1291                         resp_buftype[1] = CIFS_NO_BUFFER;
1292                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1293                         rc = 0;
1294
1295                         /* Use a fudge factor of 256 bytes in case we collide
1296                          * with a different set_EAs command.
1297                          */
1298                         if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1299                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1300                            used_len + ea_name_len + ea_value_len + 1) {
1301                                 rc = -ENOSPC;
1302                                 goto sea_exit;
1303                         }
1304                 }
1305         }
1306
1307         /* Open */
1308         memset(&open_iov, 0, sizeof(open_iov));
1309         rqst[0].rq_iov = open_iov;
1310         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1311
1312         memset(&oparms, 0, sizeof(oparms));
1313         oparms.tcon = tcon;
1314         oparms.desired_access = FILE_WRITE_EA;
1315         oparms.disposition = FILE_OPEN;
1316         oparms.create_options = cifs_create_options(cifs_sb, 0);
1317         oparms.fid = &fid;
1318         oparms.reconnect = false;
1319
1320         rc = SMB2_open_init(tcon, server,
1321                             &rqst[0], &oplock, &oparms, utf16_path);
1322         if (rc)
1323                 goto sea_exit;
1324         smb2_set_next_command(tcon, &rqst[0]);
1325
1326
1327         /* Set Info */
1328         memset(&si_iov, 0, sizeof(si_iov));
1329         rqst[1].rq_iov = si_iov;
1330         rqst[1].rq_nvec = 1;
1331
1332         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1333         ea = kzalloc(len, GFP_KERNEL);
1334         if (ea == NULL) {
1335                 rc = -ENOMEM;
1336                 goto sea_exit;
1337         }
1338
1339         ea->ea_name_length = ea_name_len;
1340         ea->ea_value_length = cpu_to_le16(ea_value_len);
1341         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1342         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1343
1344         size[0] = len;
1345         data[0] = ea;
1346
1347         rc = SMB2_set_info_init(tcon, server,
1348                                 &rqst[1], COMPOUND_FID,
1349                                 COMPOUND_FID, current->tgid,
1350                                 FILE_FULL_EA_INFORMATION,
1351                                 SMB2_O_INFO_FILE, 0, data, size);
1352         smb2_set_next_command(tcon, &rqst[1]);
1353         smb2_set_related(&rqst[1]);
1354
1355
1356         /* Close */
1357         memset(&close_iov, 0, sizeof(close_iov));
1358         rqst[2].rq_iov = close_iov;
1359         rqst[2].rq_nvec = 1;
1360         rc = SMB2_close_init(tcon, server,
1361                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1362         smb2_set_related(&rqst[2]);
1363
1364         rc = compound_send_recv(xid, ses, server,
1365                                 flags, 3, rqst,
1366                                 resp_buftype, rsp_iov);
1367         /* no need to bump num_remote_opens because handle immediately closed */
1368
1369  sea_exit:
1370         kfree(ea);
1371         kfree(utf16_path);
1372         SMB2_open_free(&rqst[0]);
1373         SMB2_set_info_free(&rqst[1]);
1374         SMB2_close_free(&rqst[2]);
1375         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1376         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1377         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1378         return rc;
1379 }
1380 #endif
1381
1382 static bool
1383 smb2_can_echo(struct TCP_Server_Info *server)
1384 {
1385         return server->echoes;
1386 }
1387
1388 static void
1389 smb2_clear_stats(struct cifs_tcon *tcon)
1390 {
1391         int i;
1392
1393         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1394                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1395                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1396         }
1397 }
1398
1399 static void
1400 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1401 {
1402         seq_puts(m, "\n\tShare Capabilities:");
1403         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1404                 seq_puts(m, " DFS,");
1405         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1406                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1407         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1408                 seq_puts(m, " SCALEOUT,");
1409         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1410                 seq_puts(m, " CLUSTER,");
1411         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1412                 seq_puts(m, " ASYMMETRIC,");
1413         if (tcon->capabilities == 0)
1414                 seq_puts(m, " None");
1415         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1416                 seq_puts(m, " Aligned,");
1417         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1418                 seq_puts(m, " Partition Aligned,");
1419         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1420                 seq_puts(m, " SSD,");
1421         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1422                 seq_puts(m, " TRIM-support,");
1423
1424         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1425         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1426         if (tcon->perf_sector_size)
1427                 seq_printf(m, "\tOptimal sector size: 0x%x",
1428                            tcon->perf_sector_size);
1429         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1430 }
1431
1432 static void
1433 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1434 {
1435         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1436         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1437
1438         /*
1439          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1440          *  totals (requests sent) since those SMBs are per-session not per tcon
1441          */
1442         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1443                    (long long)(tcon->bytes_read),
1444                    (long long)(tcon->bytes_written));
1445         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1446                    atomic_read(&tcon->num_local_opens),
1447                    atomic_read(&tcon->num_remote_opens));
1448         seq_printf(m, "\nTreeConnects: %d total %d failed",
1449                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1450                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1451         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1452                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1453                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1454         seq_printf(m, "\nCreates: %d total %d failed",
1455                    atomic_read(&sent[SMB2_CREATE_HE]),
1456                    atomic_read(&failed[SMB2_CREATE_HE]));
1457         seq_printf(m, "\nCloses: %d total %d failed",
1458                    atomic_read(&sent[SMB2_CLOSE_HE]),
1459                    atomic_read(&failed[SMB2_CLOSE_HE]));
1460         seq_printf(m, "\nFlushes: %d total %d failed",
1461                    atomic_read(&sent[SMB2_FLUSH_HE]),
1462                    atomic_read(&failed[SMB2_FLUSH_HE]));
1463         seq_printf(m, "\nReads: %d total %d failed",
1464                    atomic_read(&sent[SMB2_READ_HE]),
1465                    atomic_read(&failed[SMB2_READ_HE]));
1466         seq_printf(m, "\nWrites: %d total %d failed",
1467                    atomic_read(&sent[SMB2_WRITE_HE]),
1468                    atomic_read(&failed[SMB2_WRITE_HE]));
1469         seq_printf(m, "\nLocks: %d total %d failed",
1470                    atomic_read(&sent[SMB2_LOCK_HE]),
1471                    atomic_read(&failed[SMB2_LOCK_HE]));
1472         seq_printf(m, "\nIOCTLs: %d total %d failed",
1473                    atomic_read(&sent[SMB2_IOCTL_HE]),
1474                    atomic_read(&failed[SMB2_IOCTL_HE]));
1475         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1476                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1477                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1478         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1479                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1480                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1481         seq_printf(m, "\nQueryInfos: %d total %d failed",
1482                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1483                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1484         seq_printf(m, "\nSetInfos: %d total %d failed",
1485                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1486                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1487         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1488                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1489                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1490 }
1491
1492 static void
1493 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1494 {
1495         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1496         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1497
1498         cfile->fid.persistent_fid = fid->persistent_fid;
1499         cfile->fid.volatile_fid = fid->volatile_fid;
1500         cfile->fid.access = fid->access;
1501 #ifdef CONFIG_CIFS_DEBUG2
1502         cfile->fid.mid = fid->mid;
1503 #endif /* CIFS_DEBUG2 */
1504         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1505                                       &fid->purge_cache);
1506         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1507         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1508 }
1509
1510 static void
1511 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1512                 struct cifs_fid *fid)
1513 {
1514         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1515 }
1516
1517 static void
1518 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1519                    struct cifsFileInfo *cfile)
1520 {
1521         struct smb2_file_network_open_info file_inf;
1522         struct inode *inode;
1523         int rc;
1524
1525         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1526                    cfile->fid.volatile_fid, &file_inf);
1527         if (rc)
1528                 return;
1529
1530         inode = d_inode(cfile->dentry);
1531
1532         spin_lock(&inode->i_lock);
1533         CIFS_I(inode)->time = jiffies;
1534
1535         /* Creation time should not need to be updated on close */
1536         if (file_inf.LastWriteTime)
1537                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1538         if (file_inf.ChangeTime)
1539                 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1540         if (file_inf.LastAccessTime)
1541                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1542
1543         /*
1544          * i_blocks is not related to (i_size / i_blksize),
1545          * but instead 512 byte (2**9) size is required for
1546          * calculating num blocks.
1547          */
1548         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1549                 inode->i_blocks =
1550                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1551
1552         /* End of file and Attributes should not have to be updated on close */
1553         spin_unlock(&inode->i_lock);
1554 }
1555
1556 static int
1557 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1558                      u64 persistent_fid, u64 volatile_fid,
1559                      struct copychunk_ioctl *pcchunk)
1560 {
1561         int rc;
1562         unsigned int ret_data_len;
1563         struct resume_key_req *res_key;
1564
1565         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1566                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1567                         NULL, 0 /* no input */, CIFSMaxBufSize,
1568                         (char **)&res_key, &ret_data_len);
1569
1570         if (rc == -EOPNOTSUPP) {
1571                 pr_warn_once("Server share %s does not support copy range\n", tcon->treeName);
1572                 goto req_res_key_exit;
1573         } else if (rc) {
1574                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1575                 goto req_res_key_exit;
1576         }
1577         if (ret_data_len < sizeof(struct resume_key_req)) {
1578                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1579                 rc = -EINVAL;
1580                 goto req_res_key_exit;
1581         }
1582         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1583
1584 req_res_key_exit:
1585         kfree(res_key);
1586         return rc;
1587 }
1588
1589 struct iqi_vars {
1590         struct smb_rqst rqst[3];
1591         struct kvec rsp_iov[3];
1592         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1593         struct kvec qi_iov[1];
1594         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1595         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1596         struct kvec close_iov[1];
1597 };
1598
1599 static int
1600 smb2_ioctl_query_info(const unsigned int xid,
1601                       struct cifs_tcon *tcon,
1602                       struct cifs_sb_info *cifs_sb,
1603                       __le16 *path, int is_dir,
1604                       unsigned long p)
1605 {
1606         struct iqi_vars *vars;
1607         struct smb_rqst *rqst;
1608         struct kvec *rsp_iov;
1609         struct cifs_ses *ses = tcon->ses;
1610         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1611         char __user *arg = (char __user *)p;
1612         struct smb_query_info qi;
1613         struct smb_query_info __user *pqi;
1614         int rc = 0;
1615         int flags = CIFS_CP_CREATE_CLOSE_OP;
1616         struct smb2_query_info_rsp *qi_rsp = NULL;
1617         struct smb2_ioctl_rsp *io_rsp = NULL;
1618         void *buffer = NULL;
1619         int resp_buftype[3];
1620         struct cifs_open_parms oparms;
1621         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1622         struct cifs_fid fid;
1623         unsigned int size[2];
1624         void *data[2];
1625         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1626
1627         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1628         if (vars == NULL)
1629                 return -ENOMEM;
1630         rqst = &vars->rqst[0];
1631         rsp_iov = &vars->rsp_iov[0];
1632
1633         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1634
1635         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1636                 goto e_fault;
1637
1638         if (qi.output_buffer_length > 1024) {
1639                 kfree(vars);
1640                 return -EINVAL;
1641         }
1642
1643         if (!ses || !server) {
1644                 kfree(vars);
1645                 return -EIO;
1646         }
1647
1648         if (smb3_encryption_required(tcon))
1649                 flags |= CIFS_TRANSFORM_REQ;
1650
1651         buffer = memdup_user(arg + sizeof(struct smb_query_info),
1652                              qi.output_buffer_length);
1653         if (IS_ERR(buffer)) {
1654                 kfree(vars);
1655                 return PTR_ERR(buffer);
1656         }
1657
1658         /* Open */
1659         rqst[0].rq_iov = &vars->open_iov[0];
1660         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1661
1662         memset(&oparms, 0, sizeof(oparms));
1663         oparms.tcon = tcon;
1664         oparms.disposition = FILE_OPEN;
1665         oparms.create_options = cifs_create_options(cifs_sb, create_options);
1666         oparms.fid = &fid;
1667         oparms.reconnect = false;
1668
1669         if (qi.flags & PASSTHRU_FSCTL) {
1670                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1671                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1672                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1673                         break;
1674                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1675                         oparms.desired_access = GENERIC_ALL;
1676                         break;
1677                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1678                         oparms.desired_access = GENERIC_READ;
1679                         break;
1680                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1681                         oparms.desired_access = GENERIC_WRITE;
1682                         break;
1683                 }
1684         } else if (qi.flags & PASSTHRU_SET_INFO) {
1685                 oparms.desired_access = GENERIC_WRITE;
1686         } else {
1687                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1688         }
1689
1690         rc = SMB2_open_init(tcon, server,
1691                             &rqst[0], &oplock, &oparms, path);
1692         if (rc)
1693                 goto iqinf_exit;
1694         smb2_set_next_command(tcon, &rqst[0]);
1695
1696         /* Query */
1697         if (qi.flags & PASSTHRU_FSCTL) {
1698                 /* Can eventually relax perm check since server enforces too */
1699                 if (!capable(CAP_SYS_ADMIN))
1700                         rc = -EPERM;
1701                 else  {
1702                         rqst[1].rq_iov = &vars->io_iov[0];
1703                         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1704
1705                         rc = SMB2_ioctl_init(tcon, server,
1706                                              &rqst[1],
1707                                              COMPOUND_FID, COMPOUND_FID,
1708                                              qi.info_type, true, buffer,
1709                                              qi.output_buffer_length,
1710                                              CIFSMaxBufSize -
1711                                              MAX_SMB2_CREATE_RESPONSE_SIZE -
1712                                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
1713                 }
1714         } else if (qi.flags == PASSTHRU_SET_INFO) {
1715                 /* Can eventually relax perm check since server enforces too */
1716                 if (!capable(CAP_SYS_ADMIN))
1717                         rc = -EPERM;
1718                 else  {
1719                         rqst[1].rq_iov = &vars->si_iov[0];
1720                         rqst[1].rq_nvec = 1;
1721
1722                         size[0] = 8;
1723                         data[0] = buffer;
1724
1725                         rc = SMB2_set_info_init(tcon, server,
1726                                         &rqst[1],
1727                                         COMPOUND_FID, COMPOUND_FID,
1728                                         current->tgid,
1729                                         FILE_END_OF_FILE_INFORMATION,
1730                                         SMB2_O_INFO_FILE, 0, data, size);
1731                 }
1732         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1733                 rqst[1].rq_iov = &vars->qi_iov[0];
1734                 rqst[1].rq_nvec = 1;
1735
1736                 rc = SMB2_query_info_init(tcon, server,
1737                                   &rqst[1], COMPOUND_FID,
1738                                   COMPOUND_FID, qi.file_info_class,
1739                                   qi.info_type, qi.additional_information,
1740                                   qi.input_buffer_length,
1741                                   qi.output_buffer_length, buffer);
1742         } else { /* unknown flags */
1743                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1744                               qi.flags);
1745                 rc = -EINVAL;
1746         }
1747
1748         if (rc)
1749                 goto iqinf_exit;
1750         smb2_set_next_command(tcon, &rqst[1]);
1751         smb2_set_related(&rqst[1]);
1752
1753         /* Close */
1754         rqst[2].rq_iov = &vars->close_iov[0];
1755         rqst[2].rq_nvec = 1;
1756
1757         rc = SMB2_close_init(tcon, server,
1758                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1759         if (rc)
1760                 goto iqinf_exit;
1761         smb2_set_related(&rqst[2]);
1762
1763         rc = compound_send_recv(xid, ses, server,
1764                                 flags, 3, rqst,
1765                                 resp_buftype, rsp_iov);
1766         if (rc)
1767                 goto iqinf_exit;
1768
1769         /* No need to bump num_remote_opens since handle immediately closed */
1770         if (qi.flags & PASSTHRU_FSCTL) {
1771                 pqi = (struct smb_query_info __user *)arg;
1772                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1773                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1774                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1775                 if (qi.input_buffer_length > 0 &&
1776                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1777                     > rsp_iov[1].iov_len)
1778                         goto e_fault;
1779
1780                 if (copy_to_user(&pqi->input_buffer_length,
1781                                  &qi.input_buffer_length,
1782                                  sizeof(qi.input_buffer_length)))
1783                         goto e_fault;
1784
1785                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1786                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1787                                  qi.input_buffer_length))
1788                         goto e_fault;
1789         } else {
1790                 pqi = (struct smb_query_info __user *)arg;
1791                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1792                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1793                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1794                 if (copy_to_user(&pqi->input_buffer_length,
1795                                  &qi.input_buffer_length,
1796                                  sizeof(qi.input_buffer_length)))
1797                         goto e_fault;
1798
1799                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1800                                  qi.input_buffer_length))
1801                         goto e_fault;
1802         }
1803
1804  iqinf_exit:
1805         cifs_small_buf_release(rqst[0].rq_iov[0].iov_base);
1806         cifs_small_buf_release(rqst[1].rq_iov[0].iov_base);
1807         cifs_small_buf_release(rqst[2].rq_iov[0].iov_base);
1808         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1809         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1810         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1811         kfree(vars);
1812         kfree(buffer);
1813         return rc;
1814
1815 e_fault:
1816         rc = -EFAULT;
1817         goto iqinf_exit;
1818 }
1819
1820 static ssize_t
1821 smb2_copychunk_range(const unsigned int xid,
1822                         struct cifsFileInfo *srcfile,
1823                         struct cifsFileInfo *trgtfile, u64 src_off,
1824                         u64 len, u64 dest_off)
1825 {
1826         int rc;
1827         unsigned int ret_data_len;
1828         struct copychunk_ioctl *pcchunk;
1829         struct copychunk_ioctl_rsp *retbuf = NULL;
1830         struct cifs_tcon *tcon;
1831         int chunks_copied = 0;
1832         bool chunk_sizes_updated = false;
1833         ssize_t bytes_written, total_bytes_written = 0;
1834
1835         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1836
1837         if (pcchunk == NULL)
1838                 return -ENOMEM;
1839
1840         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1841         /* Request a key from the server to identify the source of the copy */
1842         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1843                                 srcfile->fid.persistent_fid,
1844                                 srcfile->fid.volatile_fid, pcchunk);
1845
1846         /* Note: request_res_key sets res_key null only if rc !=0 */
1847         if (rc)
1848                 goto cchunk_out;
1849
1850         /* For now array only one chunk long, will make more flexible later */
1851         pcchunk->ChunkCount = cpu_to_le32(1);
1852         pcchunk->Reserved = 0;
1853         pcchunk->Reserved2 = 0;
1854
1855         tcon = tlink_tcon(trgtfile->tlink);
1856
1857         while (len > 0) {
1858                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1859                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1860                 pcchunk->Length =
1861                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1862
1863                 /* Request server copy to target from src identified by key */
1864                 kfree(retbuf);
1865                 retbuf = NULL;
1866                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1867                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1868                         true /* is_fsctl */, (char *)pcchunk,
1869                         sizeof(struct copychunk_ioctl), CIFSMaxBufSize,
1870                         (char **)&retbuf, &ret_data_len);
1871                 if (rc == 0) {
1872                         if (ret_data_len !=
1873                                         sizeof(struct copychunk_ioctl_rsp)) {
1874                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1875                                 rc = -EIO;
1876                                 goto cchunk_out;
1877                         }
1878                         if (retbuf->TotalBytesWritten == 0) {
1879                                 cifs_dbg(FYI, "no bytes copied\n");
1880                                 rc = -EIO;
1881                                 goto cchunk_out;
1882                         }
1883                         /*
1884                          * Check if server claimed to write more than we asked
1885                          */
1886                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1887                             le32_to_cpu(pcchunk->Length)) {
1888                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1889                                 rc = -EIO;
1890                                 goto cchunk_out;
1891                         }
1892                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1893                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1894                                 rc = -EIO;
1895                                 goto cchunk_out;
1896                         }
1897                         chunks_copied++;
1898
1899                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1900                         src_off += bytes_written;
1901                         dest_off += bytes_written;
1902                         len -= bytes_written;
1903                         total_bytes_written += bytes_written;
1904
1905                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1906                                 le32_to_cpu(retbuf->ChunksWritten),
1907                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1908                                 bytes_written);
1909                 } else if (rc == -EINVAL) {
1910                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1911                                 goto cchunk_out;
1912
1913                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1914                                 le32_to_cpu(retbuf->ChunksWritten),
1915                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1916                                 le32_to_cpu(retbuf->TotalBytesWritten));
1917
1918                         /*
1919                          * Check if this is the first request using these sizes,
1920                          * (ie check if copy succeed once with original sizes
1921                          * and check if the server gave us different sizes after
1922                          * we already updated max sizes on previous request).
1923                          * if not then why is the server returning an error now
1924                          */
1925                         if ((chunks_copied != 0) || chunk_sizes_updated)
1926                                 goto cchunk_out;
1927
1928                         /* Check that server is not asking us to grow size */
1929                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1930                                         tcon->max_bytes_chunk)
1931                                 tcon->max_bytes_chunk =
1932                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1933                         else
1934                                 goto cchunk_out; /* server gave us bogus size */
1935
1936                         /* No need to change MaxChunks since already set to 1 */
1937                         chunk_sizes_updated = true;
1938                 } else
1939                         goto cchunk_out;
1940         }
1941
1942 cchunk_out:
1943         kfree(pcchunk);
1944         kfree(retbuf);
1945         if (rc)
1946                 return rc;
1947         else
1948                 return total_bytes_written;
1949 }
1950
1951 static int
1952 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1953                 struct cifs_fid *fid)
1954 {
1955         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1956 }
1957
1958 static unsigned int
1959 smb2_read_data_offset(char *buf)
1960 {
1961         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1962
1963         return rsp->DataOffset;
1964 }
1965
1966 static unsigned int
1967 smb2_read_data_length(char *buf, bool in_remaining)
1968 {
1969         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1970
1971         if (in_remaining)
1972                 return le32_to_cpu(rsp->DataRemaining);
1973
1974         return le32_to_cpu(rsp->DataLength);
1975 }
1976
1977
1978 static int
1979 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1980                struct cifs_io_parms *parms, unsigned int *bytes_read,
1981                char **buf, int *buf_type)
1982 {
1983         parms->persistent_fid = pfid->persistent_fid;
1984         parms->volatile_fid = pfid->volatile_fid;
1985         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1986 }
1987
1988 static int
1989 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1990                 struct cifs_io_parms *parms, unsigned int *written,
1991                 struct kvec *iov, unsigned long nr_segs)
1992 {
1993
1994         parms->persistent_fid = pfid->persistent_fid;
1995         parms->volatile_fid = pfid->volatile_fid;
1996         return SMB2_write(xid, parms, written, iov, nr_segs);
1997 }
1998
1999 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
2000 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
2001                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
2002 {
2003         struct cifsInodeInfo *cifsi;
2004         int rc;
2005
2006         cifsi = CIFS_I(inode);
2007
2008         /* if file already sparse don't bother setting sparse again */
2009         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
2010                 return true; /* already sparse */
2011
2012         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
2013                 return true; /* already not sparse */
2014
2015         /*
2016          * Can't check for sparse support on share the usual way via the
2017          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
2018          * since Samba server doesn't set the flag on the share, yet
2019          * supports the set sparse FSCTL and returns sparse correctly
2020          * in the file attributes. If we fail setting sparse though we
2021          * mark that server does not support sparse files for this share
2022          * to avoid repeatedly sending the unsupported fsctl to server
2023          * if the file is repeatedly extended.
2024          */
2025         if (tcon->broken_sparse_sup)
2026                 return false;
2027
2028         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2029                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
2030                         true /* is_fctl */,
2031                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
2032         if (rc) {
2033                 tcon->broken_sparse_sup = true;
2034                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
2035                 return false;
2036         }
2037
2038         if (setsparse)
2039                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
2040         else
2041                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
2042
2043         return true;
2044 }
2045
2046 static int
2047 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
2048                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
2049 {
2050         __le64 eof = cpu_to_le64(size);
2051         struct inode *inode;
2052
2053         /*
2054          * If extending file more than one page make sparse. Many Linux fs
2055          * make files sparse by default when extending via ftruncate
2056          */
2057         inode = d_inode(cfile->dentry);
2058
2059         if (!set_alloc && (size > inode->i_size + 8192)) {
2060                 __u8 set_sparse = 1;
2061
2062                 /* whether set sparse succeeds or not, extend the file */
2063                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
2064         }
2065
2066         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
2067                             cfile->fid.volatile_fid, cfile->pid, &eof);
2068 }
2069
2070 static int
2071 smb2_duplicate_extents(const unsigned int xid,
2072                         struct cifsFileInfo *srcfile,
2073                         struct cifsFileInfo *trgtfile, u64 src_off,
2074                         u64 len, u64 dest_off)
2075 {
2076         int rc;
2077         unsigned int ret_data_len;
2078         struct inode *inode;
2079         struct duplicate_extents_to_file dup_ext_buf;
2080         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
2081
2082         /* server fileays advertise duplicate extent support with this flag */
2083         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
2084              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
2085                 return -EOPNOTSUPP;
2086
2087         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
2088         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
2089         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
2090         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
2091         dup_ext_buf.ByteCount = cpu_to_le64(len);
2092         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
2093                 src_off, dest_off, len);
2094
2095         inode = d_inode(trgtfile->dentry);
2096         if (inode->i_size < dest_off + len) {
2097                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
2098                 if (rc)
2099                         goto duplicate_extents_out;
2100
2101                 /*
2102                  * Although also could set plausible allocation size (i_blocks)
2103                  * here in addition to setting the file size, in reflink
2104                  * it is likely that the target file is sparse. Its allocation
2105                  * size will be queried on next revalidate, but it is important
2106                  * to make sure that file's cached size is updated immediately
2107                  */
2108                 cifs_setsize(inode, dest_off + len);
2109         }
2110         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
2111                         trgtfile->fid.volatile_fid,
2112                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
2113                         true /* is_fsctl */,
2114                         (char *)&dup_ext_buf,
2115                         sizeof(struct duplicate_extents_to_file),
2116                         CIFSMaxBufSize, NULL,
2117                         &ret_data_len);
2118
2119         if (ret_data_len > 0)
2120                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2121
2122 duplicate_extents_out:
2123         return rc;
2124 }
2125
2126 static int
2127 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2128                    struct cifsFileInfo *cfile)
2129 {
2130         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2131                             cfile->fid.volatile_fid);
2132 }
2133
2134 static int
2135 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2136                    struct cifsFileInfo *cfile)
2137 {
2138         struct fsctl_set_integrity_information_req integr_info;
2139         unsigned int ret_data_len;
2140
2141         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2142         integr_info.Flags = 0;
2143         integr_info.Reserved = 0;
2144
2145         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2146                         cfile->fid.volatile_fid,
2147                         FSCTL_SET_INTEGRITY_INFORMATION,
2148                         true /* is_fsctl */,
2149                         (char *)&integr_info,
2150                         sizeof(struct fsctl_set_integrity_information_req),
2151                         CIFSMaxBufSize, NULL,
2152                         &ret_data_len);
2153
2154 }
2155
2156 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2157 #define GMT_TOKEN_SIZE 50
2158
2159 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2160
2161 /*
2162  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2163  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2164  */
2165 static int
2166 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2167                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2168 {
2169         char *retbuf = NULL;
2170         unsigned int ret_data_len = 0;
2171         int rc;
2172         u32 max_response_size;
2173         struct smb_snapshot_array snapshot_in;
2174
2175         /*
2176          * On the first query to enumerate the list of snapshots available
2177          * for this volume the buffer begins with 0 (number of snapshots
2178          * which can be returned is zero since at that point we do not know
2179          * how big the buffer needs to be). On the second query,
2180          * it (ret_data_len) is set to number of snapshots so we can
2181          * know to set the maximum response size larger (see below).
2182          */
2183         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2184                 return -EFAULT;
2185
2186         /*
2187          * Note that for snapshot queries that servers like Azure expect that
2188          * the first query be minimal size (and just used to get the number/size
2189          * of previous versions) so response size must be specified as EXACTLY
2190          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2191          * of eight bytes.
2192          */
2193         if (ret_data_len == 0)
2194                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2195         else
2196                 max_response_size = CIFSMaxBufSize;
2197
2198         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2199                         cfile->fid.volatile_fid,
2200                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2201                         true /* is_fsctl */,
2202                         NULL, 0 /* no input data */, max_response_size,
2203                         (char **)&retbuf,
2204                         &ret_data_len);
2205         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2206                         rc, ret_data_len);
2207         if (rc)
2208                 return rc;
2209
2210         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2211                 /* Fixup buffer */
2212                 if (copy_from_user(&snapshot_in, ioc_buf,
2213                     sizeof(struct smb_snapshot_array))) {
2214                         rc = -EFAULT;
2215                         kfree(retbuf);
2216                         return rc;
2217                 }
2218
2219                 /*
2220                  * Check for min size, ie not large enough to fit even one GMT
2221                  * token (snapshot).  On the first ioctl some users may pass in
2222                  * smaller size (or zero) to simply get the size of the array
2223                  * so the user space caller can allocate sufficient memory
2224                  * and retry the ioctl again with larger array size sufficient
2225                  * to hold all of the snapshot GMT tokens on the second try.
2226                  */
2227                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2228                         ret_data_len = sizeof(struct smb_snapshot_array);
2229
2230                 /*
2231                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2232                  * the snapshot array (of 50 byte GMT tokens) each
2233                  * representing an available previous version of the data
2234                  */
2235                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2236                                         sizeof(struct smb_snapshot_array)))
2237                         ret_data_len = snapshot_in.snapshot_array_size +
2238                                         sizeof(struct smb_snapshot_array);
2239
2240                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2241                         rc = -EFAULT;
2242         }
2243
2244         kfree(retbuf);
2245         return rc;
2246 }
2247
2248
2249
2250 static int
2251 smb3_notify(const unsigned int xid, struct file *pfile,
2252             void __user *ioc_buf)
2253 {
2254         struct smb3_notify notify;
2255         struct dentry *dentry = pfile->f_path.dentry;
2256         struct inode *inode = file_inode(pfile);
2257         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2258         struct cifs_open_parms oparms;
2259         struct cifs_fid fid;
2260         struct cifs_tcon *tcon;
2261         const unsigned char *path;
2262         void *page = alloc_dentry_path();
2263         __le16 *utf16_path = NULL;
2264         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2265         int rc = 0;
2266
2267         path = build_path_from_dentry(dentry, page);
2268         if (IS_ERR(path)) {
2269                 rc = PTR_ERR(path);
2270                 goto notify_exit;
2271         }
2272
2273         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2274         if (utf16_path == NULL) {
2275                 rc = -ENOMEM;
2276                 goto notify_exit;
2277         }
2278
2279         if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2280                 rc = -EFAULT;
2281                 goto notify_exit;
2282         }
2283
2284         tcon = cifs_sb_master_tcon(cifs_sb);
2285         oparms.tcon = tcon;
2286         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2287         oparms.disposition = FILE_OPEN;
2288         oparms.create_options = cifs_create_options(cifs_sb, 0);
2289         oparms.fid = &fid;
2290         oparms.reconnect = false;
2291
2292         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2293                        NULL);
2294         if (rc)
2295                 goto notify_exit;
2296
2297         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2298                                 notify.watch_tree, notify.completion_filter);
2299
2300         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2301
2302         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2303
2304 notify_exit:
2305         free_dentry_path(page);
2306         kfree(utf16_path);
2307         return rc;
2308 }
2309
2310 static int
2311 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2312                      const char *path, struct cifs_sb_info *cifs_sb,
2313                      struct cifs_fid *fid, __u16 search_flags,
2314                      struct cifs_search_info *srch_inf)
2315 {
2316         __le16 *utf16_path;
2317         struct smb_rqst rqst[2];
2318         struct kvec rsp_iov[2];
2319         int resp_buftype[2];
2320         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2321         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2322         int rc, flags = 0;
2323         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2324         struct cifs_open_parms oparms;
2325         struct smb2_query_directory_rsp *qd_rsp = NULL;
2326         struct smb2_create_rsp *op_rsp = NULL;
2327         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2328         int retry_count = 0;
2329
2330         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2331         if (!utf16_path)
2332                 return -ENOMEM;
2333
2334         if (smb3_encryption_required(tcon))
2335                 flags |= CIFS_TRANSFORM_REQ;
2336
2337         memset(rqst, 0, sizeof(rqst));
2338         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2339         memset(rsp_iov, 0, sizeof(rsp_iov));
2340
2341         /* Open */
2342         memset(&open_iov, 0, sizeof(open_iov));
2343         rqst[0].rq_iov = open_iov;
2344         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2345
2346         oparms.tcon = tcon;
2347         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2348         oparms.disposition = FILE_OPEN;
2349         oparms.create_options = cifs_create_options(cifs_sb, 0);
2350         oparms.fid = fid;
2351         oparms.reconnect = false;
2352
2353         rc = SMB2_open_init(tcon, server,
2354                             &rqst[0], &oplock, &oparms, utf16_path);
2355         if (rc)
2356                 goto qdf_free;
2357         smb2_set_next_command(tcon, &rqst[0]);
2358
2359         /* Query directory */
2360         srch_inf->entries_in_buffer = 0;
2361         srch_inf->index_of_last_entry = 2;
2362
2363         memset(&qd_iov, 0, sizeof(qd_iov));
2364         rqst[1].rq_iov = qd_iov;
2365         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2366
2367         rc = SMB2_query_directory_init(xid, tcon, server,
2368                                        &rqst[1],
2369                                        COMPOUND_FID, COMPOUND_FID,
2370                                        0, srch_inf->info_level);
2371         if (rc)
2372                 goto qdf_free;
2373
2374         smb2_set_related(&rqst[1]);
2375
2376 again:
2377         rc = compound_send_recv(xid, tcon->ses, server,
2378                                 flags, 2, rqst,
2379                                 resp_buftype, rsp_iov);
2380
2381         if (rc == -EAGAIN && retry_count++ < 10)
2382                 goto again;
2383
2384         /* If the open failed there is nothing to do */
2385         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2386         if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
2387                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2388                 goto qdf_free;
2389         }
2390         fid->persistent_fid = op_rsp->PersistentFileId;
2391         fid->volatile_fid = op_rsp->VolatileFileId;
2392
2393         /* Anything else than ENODATA means a genuine error */
2394         if (rc && rc != -ENODATA) {
2395                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2396                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2397                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2398                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2399                 goto qdf_free;
2400         }
2401
2402         atomic_inc(&tcon->num_remote_opens);
2403
2404         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2405         if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
2406                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2407                                           tcon->tid, tcon->ses->Suid, 0, 0);
2408                 srch_inf->endOfSearch = true;
2409                 rc = 0;
2410                 goto qdf_free;
2411         }
2412
2413         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2414                                         srch_inf);
2415         if (rc) {
2416                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2417                         tcon->ses->Suid, 0, 0, rc);
2418                 goto qdf_free;
2419         }
2420         resp_buftype[1] = CIFS_NO_BUFFER;
2421
2422         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2423                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2424
2425  qdf_free:
2426         kfree(utf16_path);
2427         SMB2_open_free(&rqst[0]);
2428         SMB2_query_directory_free(&rqst[1]);
2429         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2430         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2431         return rc;
2432 }
2433
2434 static int
2435 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2436                     struct cifs_fid *fid, __u16 search_flags,
2437                     struct cifs_search_info *srch_inf)
2438 {
2439         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2440                                     fid->volatile_fid, 0, srch_inf);
2441 }
2442
2443 static int
2444 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2445                struct cifs_fid *fid)
2446 {
2447         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2448 }
2449
2450 /*
2451  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2452  * the number of credits and return true. Otherwise - return false.
2453  */
2454 static bool
2455 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2456 {
2457         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2458         int scredits, in_flight;
2459
2460         if (shdr->Status != STATUS_PENDING)
2461                 return false;
2462
2463         if (shdr->CreditRequest) {
2464                 spin_lock(&server->req_lock);
2465                 server->credits += le16_to_cpu(shdr->CreditRequest);
2466                 scredits = server->credits;
2467                 in_flight = server->in_flight;
2468                 spin_unlock(&server->req_lock);
2469                 wake_up(&server->request_q);
2470
2471                 trace_smb3_add_credits(server->CurrentMid,
2472                                 server->conn_id, server->hostname, scredits,
2473                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2474                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2475                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2476         }
2477
2478         return true;
2479 }
2480
2481 static bool
2482 smb2_is_session_expired(char *buf)
2483 {
2484         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2485
2486         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2487             shdr->Status != STATUS_USER_SESSION_DELETED)
2488                 return false;
2489
2490         trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2491                                le16_to_cpu(shdr->Command),
2492                                le64_to_cpu(shdr->MessageId));
2493         cifs_dbg(FYI, "Session expired or deleted\n");
2494
2495         return true;
2496 }
2497
2498 static bool
2499 smb2_is_status_io_timeout(char *buf)
2500 {
2501         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2502
2503         if (shdr->Status == STATUS_IO_TIMEOUT)
2504                 return true;
2505         else
2506                 return false;
2507 }
2508
2509 static void
2510 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2511 {
2512         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2513         struct list_head *tmp, *tmp1;
2514         struct cifs_ses *ses;
2515         struct cifs_tcon *tcon;
2516
2517         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2518                 return;
2519
2520         spin_lock(&cifs_tcp_ses_lock);
2521         list_for_each(tmp, &server->smb_ses_list) {
2522                 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
2523                 list_for_each(tmp1, &ses->tcon_list) {
2524                         tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
2525                         if (tcon->tid == shdr->TreeId) {
2526                                 tcon->need_reconnect = true;
2527                                 spin_unlock(&cifs_tcp_ses_lock);
2528                                 pr_warn_once("Server share %s deleted.\n",
2529                                              tcon->treeName);
2530                                 return;
2531                         }
2532                 }
2533         }
2534         spin_unlock(&cifs_tcp_ses_lock);
2535 }
2536
2537 static int
2538 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2539                      struct cifsInodeInfo *cinode)
2540 {
2541         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2542                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2543                                         smb2_get_lease_state(cinode));
2544
2545         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2546                                  fid->volatile_fid,
2547                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2548 }
2549
2550 void
2551 smb2_set_related(struct smb_rqst *rqst)
2552 {
2553         struct smb2_sync_hdr *shdr;
2554
2555         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2556         if (shdr == NULL) {
2557                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2558                 return;
2559         }
2560         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2561 }
2562
2563 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2564
2565 void
2566 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2567 {
2568         struct smb2_sync_hdr *shdr;
2569         struct cifs_ses *ses = tcon->ses;
2570         struct TCP_Server_Info *server = ses->server;
2571         unsigned long len = smb_rqst_len(server, rqst);
2572         int i, num_padding;
2573
2574         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2575         if (shdr == NULL) {
2576                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2577                 return;
2578         }
2579
2580         /* SMB headers in a compound are 8 byte aligned. */
2581
2582         /* No padding needed */
2583         if (!(len & 7))
2584                 goto finished;
2585
2586         num_padding = 8 - (len & 7);
2587         if (!smb3_encryption_required(tcon)) {
2588                 /*
2589                  * If we do not have encryption then we can just add an extra
2590                  * iov for the padding.
2591                  */
2592                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2593                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2594                 rqst->rq_nvec++;
2595                 len += num_padding;
2596         } else {
2597                 /*
2598                  * We can not add a small padding iov for the encryption case
2599                  * because the encryption framework can not handle the padding
2600                  * iovs.
2601                  * We have to flatten this into a single buffer and add
2602                  * the padding to it.
2603                  */
2604                 for (i = 1; i < rqst->rq_nvec; i++) {
2605                         memcpy(rqst->rq_iov[0].iov_base +
2606                                rqst->rq_iov[0].iov_len,
2607                                rqst->rq_iov[i].iov_base,
2608                                rqst->rq_iov[i].iov_len);
2609                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2610                 }
2611                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2612                        0, num_padding);
2613                 rqst->rq_iov[0].iov_len += num_padding;
2614                 len += num_padding;
2615                 rqst->rq_nvec = 1;
2616         }
2617
2618  finished:
2619         shdr->NextCommand = cpu_to_le32(len);
2620 }
2621
2622 /*
2623  * Passes the query info response back to the caller on success.
2624  * Caller need to free this with free_rsp_buf().
2625  */
2626 int
2627 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2628                          __le16 *utf16_path, u32 desired_access,
2629                          u32 class, u32 type, u32 output_len,
2630                          struct kvec *rsp, int *buftype,
2631                          struct cifs_sb_info *cifs_sb)
2632 {
2633         struct cifs_ses *ses = tcon->ses;
2634         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2635         int flags = CIFS_CP_CREATE_CLOSE_OP;
2636         struct smb_rqst rqst[3];
2637         int resp_buftype[3];
2638         struct kvec rsp_iov[3];
2639         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2640         struct kvec qi_iov[1];
2641         struct kvec close_iov[1];
2642         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2643         struct cifs_open_parms oparms;
2644         struct cifs_fid fid;
2645         int rc;
2646
2647         if (smb3_encryption_required(tcon))
2648                 flags |= CIFS_TRANSFORM_REQ;
2649
2650         memset(rqst, 0, sizeof(rqst));
2651         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2652         memset(rsp_iov, 0, sizeof(rsp_iov));
2653
2654         memset(&open_iov, 0, sizeof(open_iov));
2655         rqst[0].rq_iov = open_iov;
2656         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2657
2658         oparms.tcon = tcon;
2659         oparms.desired_access = desired_access;
2660         oparms.disposition = FILE_OPEN;
2661         oparms.create_options = cifs_create_options(cifs_sb, 0);
2662         oparms.fid = &fid;
2663         oparms.reconnect = false;
2664
2665         rc = SMB2_open_init(tcon, server,
2666                             &rqst[0], &oplock, &oparms, utf16_path);
2667         if (rc)
2668                 goto qic_exit;
2669         smb2_set_next_command(tcon, &rqst[0]);
2670
2671         memset(&qi_iov, 0, sizeof(qi_iov));
2672         rqst[1].rq_iov = qi_iov;
2673         rqst[1].rq_nvec = 1;
2674
2675         rc = SMB2_query_info_init(tcon, server,
2676                                   &rqst[1], COMPOUND_FID, COMPOUND_FID,
2677                                   class, type, 0,
2678                                   output_len, 0,
2679                                   NULL);
2680         if (rc)
2681                 goto qic_exit;
2682         smb2_set_next_command(tcon, &rqst[1]);
2683         smb2_set_related(&rqst[1]);
2684
2685         memset(&close_iov, 0, sizeof(close_iov));
2686         rqst[2].rq_iov = close_iov;
2687         rqst[2].rq_nvec = 1;
2688
2689         rc = SMB2_close_init(tcon, server,
2690                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2691         if (rc)
2692                 goto qic_exit;
2693         smb2_set_related(&rqst[2]);
2694
2695         rc = compound_send_recv(xid, ses, server,
2696                                 flags, 3, rqst,
2697                                 resp_buftype, rsp_iov);
2698         if (rc) {
2699                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2700                 if (rc == -EREMCHG) {
2701                         tcon->need_reconnect = true;
2702                         pr_warn_once("server share %s deleted\n",
2703                                      tcon->treeName);
2704                 }
2705                 goto qic_exit;
2706         }
2707         *rsp = rsp_iov[1];
2708         *buftype = resp_buftype[1];
2709
2710  qic_exit:
2711         SMB2_open_free(&rqst[0]);
2712         SMB2_query_info_free(&rqst[1]);
2713         SMB2_close_free(&rqst[2]);
2714         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2715         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2716         return rc;
2717 }
2718
2719 static int
2720 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2721              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2722 {
2723         struct smb2_query_info_rsp *rsp;
2724         struct smb2_fs_full_size_info *info = NULL;
2725         __le16 utf16_path = 0; /* Null - open root of share */
2726         struct kvec rsp_iov = {NULL, 0};
2727         int buftype = CIFS_NO_BUFFER;
2728         int rc;
2729
2730
2731         rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2732                                       FILE_READ_ATTRIBUTES,
2733                                       FS_FULL_SIZE_INFORMATION,
2734                                       SMB2_O_INFO_FILESYSTEM,
2735                                       sizeof(struct smb2_fs_full_size_info),
2736                                       &rsp_iov, &buftype, cifs_sb);
2737         if (rc)
2738                 goto qfs_exit;
2739
2740         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2741         buf->f_type = SMB2_MAGIC_NUMBER;
2742         info = (struct smb2_fs_full_size_info *)(
2743                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2744         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2745                                le32_to_cpu(rsp->OutputBufferLength),
2746                                &rsp_iov,
2747                                sizeof(struct smb2_fs_full_size_info));
2748         if (!rc)
2749                 smb2_copy_fs_info_to_kstatfs(info, buf);
2750
2751 qfs_exit:
2752         free_rsp_buf(buftype, rsp_iov.iov_base);
2753         return rc;
2754 }
2755
2756 static int
2757 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2758                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2759 {
2760         int rc;
2761         __le16 srch_path = 0; /* Null - open root of share */
2762         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2763         struct cifs_open_parms oparms;
2764         struct cifs_fid fid;
2765
2766         if (!tcon->posix_extensions)
2767                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2768
2769         oparms.tcon = tcon;
2770         oparms.desired_access = FILE_READ_ATTRIBUTES;
2771         oparms.disposition = FILE_OPEN;
2772         oparms.create_options = cifs_create_options(cifs_sb, 0);
2773         oparms.fid = &fid;
2774         oparms.reconnect = false;
2775
2776         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2777                        NULL, NULL);
2778         if (rc)
2779                 return rc;
2780
2781         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2782                                    fid.volatile_fid, buf);
2783         buf->f_type = SMB2_MAGIC_NUMBER;
2784         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2785         return rc;
2786 }
2787
2788 static bool
2789 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2790 {
2791         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2792                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2793 }
2794
2795 static int
2796 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2797                __u64 length, __u32 type, int lock, int unlock, bool wait)
2798 {
2799         if (unlock && !lock)
2800                 type = SMB2_LOCKFLAG_UNLOCK;
2801         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2802                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2803                          current->tgid, length, offset, type, wait);
2804 }
2805
2806 static void
2807 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2808 {
2809         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2810 }
2811
2812 static void
2813 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2814 {
2815         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2816 }
2817
2818 static void
2819 smb2_new_lease_key(struct cifs_fid *fid)
2820 {
2821         generate_random_uuid(fid->lease_key);
2822 }
2823
2824 static int
2825 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2826                    const char *search_name,
2827                    struct dfs_info3_param **target_nodes,
2828                    unsigned int *num_of_nodes,
2829                    const struct nls_table *nls_codepage, int remap)
2830 {
2831         int rc;
2832         __le16 *utf16_path = NULL;
2833         int utf16_path_len = 0;
2834         struct cifs_tcon *tcon;
2835         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2836         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2837         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2838
2839         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2840
2841         /*
2842          * Try to use the IPC tcon, otherwise just use any
2843          */
2844         tcon = ses->tcon_ipc;
2845         if (tcon == NULL) {
2846                 spin_lock(&cifs_tcp_ses_lock);
2847                 tcon = list_first_entry_or_null(&ses->tcon_list,
2848                                                 struct cifs_tcon,
2849                                                 tcon_list);
2850                 if (tcon)
2851                         tcon->tc_count++;
2852                 spin_unlock(&cifs_tcp_ses_lock);
2853         }
2854
2855         if (tcon == NULL) {
2856                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2857                          ses);
2858                 rc = -ENOTCONN;
2859                 goto out;
2860         }
2861
2862         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2863                                            &utf16_path_len,
2864                                            nls_codepage, remap);
2865         if (!utf16_path) {
2866                 rc = -ENOMEM;
2867                 goto out;
2868         }
2869
2870         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2871         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2872         if (!dfs_req) {
2873                 rc = -ENOMEM;
2874                 goto out;
2875         }
2876
2877         /* Highest DFS referral version understood */
2878         dfs_req->MaxReferralLevel = DFS_VERSION;
2879
2880         /* Path to resolve in an UTF-16 null-terminated string */
2881         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2882
2883         do {
2884                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2885                                 FSCTL_DFS_GET_REFERRALS,
2886                                 true /* is_fsctl */,
2887                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2888                                 (char **)&dfs_rsp, &dfs_rsp_size);
2889         } while (rc == -EAGAIN);
2890
2891         if (rc) {
2892                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2893                         cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2894                 goto out;
2895         }
2896
2897         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2898                                  num_of_nodes, target_nodes,
2899                                  nls_codepage, remap, search_name,
2900                                  true /* is_unicode */);
2901         if (rc) {
2902                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2903                 goto out;
2904         }
2905
2906  out:
2907         if (tcon && !tcon->ipc) {
2908                 /* ipc tcons are not refcounted */
2909                 spin_lock(&cifs_tcp_ses_lock);
2910                 tcon->tc_count--;
2911                 spin_unlock(&cifs_tcp_ses_lock);
2912         }
2913         kfree(utf16_path);
2914         kfree(dfs_req);
2915         kfree(dfs_rsp);
2916         return rc;
2917 }
2918
2919 static int
2920 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2921                       u32 plen, char **target_path,
2922                       struct cifs_sb_info *cifs_sb)
2923 {
2924         unsigned int len;
2925
2926         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2927         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2928
2929         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2930                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2931                         le64_to_cpu(symlink_buf->InodeType));
2932                 return -EOPNOTSUPP;
2933         }
2934
2935         *target_path = cifs_strndup_from_utf16(
2936                                 symlink_buf->PathBuffer,
2937                                 len, true, cifs_sb->local_nls);
2938         if (!(*target_path))
2939                 return -ENOMEM;
2940
2941         convert_delimiter(*target_path, '/');
2942         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2943
2944         return 0;
2945 }
2946
2947 static int
2948 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2949                       u32 plen, char **target_path,
2950                       struct cifs_sb_info *cifs_sb)
2951 {
2952         unsigned int sub_len;
2953         unsigned int sub_offset;
2954
2955         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2956
2957         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2958         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2959         if (sub_offset + 20 > plen ||
2960             sub_offset + sub_len + 20 > plen) {
2961                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2962                 return -EIO;
2963         }
2964
2965         *target_path = cifs_strndup_from_utf16(
2966                                 symlink_buf->PathBuffer + sub_offset,
2967                                 sub_len, true, cifs_sb->local_nls);
2968         if (!(*target_path))
2969                 return -ENOMEM;
2970
2971         convert_delimiter(*target_path, '/');
2972         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2973
2974         return 0;
2975 }
2976
2977 static int
2978 parse_reparse_point(struct reparse_data_buffer *buf,
2979                     u32 plen, char **target_path,
2980                     struct cifs_sb_info *cifs_sb)
2981 {
2982         if (plen < sizeof(struct reparse_data_buffer)) {
2983                 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2984                          plen);
2985                 return -EIO;
2986         }
2987
2988         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2989             sizeof(struct reparse_data_buffer)) {
2990                 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2991                          plen);
2992                 return -EIO;
2993         }
2994
2995         /* See MS-FSCC 2.1.2 */
2996         switch (le32_to_cpu(buf->ReparseTag)) {
2997         case IO_REPARSE_TAG_NFS:
2998                 return parse_reparse_posix(
2999                         (struct reparse_posix_data *)buf,
3000                         plen, target_path, cifs_sb);
3001         case IO_REPARSE_TAG_SYMLINK:
3002                 return parse_reparse_symlink(
3003                         (struct reparse_symlink_data_buffer *)buf,
3004                         plen, target_path, cifs_sb);
3005         default:
3006                 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
3007                          le32_to_cpu(buf->ReparseTag));
3008                 return -EOPNOTSUPP;
3009         }
3010 }
3011
3012 #define SMB2_SYMLINK_STRUCT_SIZE \
3013         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
3014
3015 static int
3016 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
3017                    struct cifs_sb_info *cifs_sb, const char *full_path,
3018                    char **target_path, bool is_reparse_point)
3019 {
3020         int rc;
3021         __le16 *utf16_path = NULL;
3022         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3023         struct cifs_open_parms oparms;
3024         struct cifs_fid fid;
3025         struct kvec err_iov = {NULL, 0};
3026         struct smb2_err_rsp *err_buf = NULL;
3027         struct smb2_symlink_err_rsp *symlink;
3028         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3029         unsigned int sub_len;
3030         unsigned int sub_offset;
3031         unsigned int print_len;
3032         unsigned int print_offset;
3033         int flags = CIFS_CP_CREATE_CLOSE_OP;
3034         struct smb_rqst rqst[3];
3035         int resp_buftype[3];
3036         struct kvec rsp_iov[3];
3037         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3038         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3039         struct kvec close_iov[1];
3040         struct smb2_create_rsp *create_rsp;
3041         struct smb2_ioctl_rsp *ioctl_rsp;
3042         struct reparse_data_buffer *reparse_buf;
3043         int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
3044         u32 plen;
3045
3046         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3047
3048         *target_path = NULL;
3049
3050         if (smb3_encryption_required(tcon))
3051                 flags |= CIFS_TRANSFORM_REQ;
3052
3053         memset(rqst, 0, sizeof(rqst));
3054         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3055         memset(rsp_iov, 0, sizeof(rsp_iov));
3056
3057         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3058         if (!utf16_path)
3059                 return -ENOMEM;
3060
3061         /* Open */
3062         memset(&open_iov, 0, sizeof(open_iov));
3063         rqst[0].rq_iov = open_iov;
3064         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3065
3066         memset(&oparms, 0, sizeof(oparms));
3067         oparms.tcon = tcon;
3068         oparms.desired_access = FILE_READ_ATTRIBUTES;
3069         oparms.disposition = FILE_OPEN;
3070         oparms.create_options = cifs_create_options(cifs_sb, create_options);
3071         oparms.fid = &fid;
3072         oparms.reconnect = false;
3073
3074         rc = SMB2_open_init(tcon, server,
3075                             &rqst[0], &oplock, &oparms, utf16_path);
3076         if (rc)
3077                 goto querty_exit;
3078         smb2_set_next_command(tcon, &rqst[0]);
3079
3080
3081         /* IOCTL */
3082         memset(&io_iov, 0, sizeof(io_iov));
3083         rqst[1].rq_iov = io_iov;
3084         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3085
3086         rc = SMB2_ioctl_init(tcon, server,
3087                              &rqst[1], fid.persistent_fid,
3088                              fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
3089                              true /* is_fctl */, NULL, 0,
3090                              CIFSMaxBufSize -
3091                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3092                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3093         if (rc)
3094                 goto querty_exit;
3095
3096         smb2_set_next_command(tcon, &rqst[1]);
3097         smb2_set_related(&rqst[1]);
3098
3099
3100         /* Close */
3101         memset(&close_iov, 0, sizeof(close_iov));
3102         rqst[2].rq_iov = close_iov;
3103         rqst[2].rq_nvec = 1;
3104
3105         rc = SMB2_close_init(tcon, server,
3106                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3107         if (rc)
3108                 goto querty_exit;
3109
3110         smb2_set_related(&rqst[2]);
3111
3112         rc = compound_send_recv(xid, tcon->ses, server,
3113                                 flags, 3, rqst,
3114                                 resp_buftype, rsp_iov);
3115
3116         create_rsp = rsp_iov[0].iov_base;
3117         if (create_rsp && create_rsp->sync_hdr.Status)
3118                 err_iov = rsp_iov[0];
3119         ioctl_rsp = rsp_iov[1].iov_base;
3120
3121         /*
3122          * Open was successful and we got an ioctl response.
3123          */
3124         if ((rc == 0) && (is_reparse_point)) {
3125                 /* See MS-FSCC 2.3.23 */
3126
3127                 reparse_buf = (struct reparse_data_buffer *)
3128                         ((char *)ioctl_rsp +
3129                          le32_to_cpu(ioctl_rsp->OutputOffset));
3130                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3131
3132                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3133                     rsp_iov[1].iov_len) {
3134                         cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
3135                                  plen);
3136                         rc = -EIO;
3137                         goto querty_exit;
3138                 }
3139
3140                 rc = parse_reparse_point(reparse_buf, plen, target_path,
3141                                          cifs_sb);
3142                 goto querty_exit;
3143         }
3144
3145         if (!rc || !err_iov.iov_base) {
3146                 rc = -ENOENT;
3147                 goto querty_exit;
3148         }
3149
3150         err_buf = err_iov.iov_base;
3151         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
3152             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
3153                 rc = -EINVAL;
3154                 goto querty_exit;
3155         }
3156
3157         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
3158         if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
3159             le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
3160                 rc = -EINVAL;
3161                 goto querty_exit;
3162         }
3163
3164         /* open must fail on symlink - reset rc */
3165         rc = 0;
3166         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
3167         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
3168         print_len = le16_to_cpu(symlink->PrintNameLength);
3169         print_offset = le16_to_cpu(symlink->PrintNameOffset);
3170
3171         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
3172                 rc = -EINVAL;
3173                 goto querty_exit;
3174         }
3175
3176         if (err_iov.iov_len <
3177             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
3178                 rc = -EINVAL;
3179                 goto querty_exit;
3180         }
3181
3182         *target_path = cifs_strndup_from_utf16(
3183                                 (char *)symlink->PathBuffer + sub_offset,
3184                                 sub_len, true, cifs_sb->local_nls);
3185         if (!(*target_path)) {
3186                 rc = -ENOMEM;
3187                 goto querty_exit;
3188         }
3189         convert_delimiter(*target_path, '/');
3190         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
3191
3192  querty_exit:
3193         cifs_dbg(FYI, "query symlink rc %d\n", rc);
3194         kfree(utf16_path);
3195         SMB2_open_free(&rqst[0]);
3196         SMB2_ioctl_free(&rqst[1]);
3197         SMB2_close_free(&rqst[2]);
3198         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3199         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3200         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3201         return rc;
3202 }
3203
3204 int
3205 smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
3206                    struct cifs_sb_info *cifs_sb, const char *full_path,
3207                    __u32 *tag)
3208 {
3209         int rc;
3210         __le16 *utf16_path = NULL;
3211         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3212         struct cifs_open_parms oparms;
3213         struct cifs_fid fid;
3214         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3215         int flags = CIFS_CP_CREATE_CLOSE_OP;
3216         struct smb_rqst rqst[3];
3217         int resp_buftype[3];
3218         struct kvec rsp_iov[3];
3219         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3220         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3221         struct kvec close_iov[1];
3222         struct smb2_ioctl_rsp *ioctl_rsp;
3223         struct reparse_data_buffer *reparse_buf;
3224         u32 plen;
3225
3226         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3227
3228         if (smb3_encryption_required(tcon))
3229                 flags |= CIFS_TRANSFORM_REQ;
3230
3231         memset(rqst, 0, sizeof(rqst));
3232         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3233         memset(rsp_iov, 0, sizeof(rsp_iov));
3234
3235         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3236         if (!utf16_path)
3237                 return -ENOMEM;
3238
3239         /*
3240          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3241          * to see if there is a handle already open that we can use
3242          */
3243         memset(&open_iov, 0, sizeof(open_iov));
3244         rqst[0].rq_iov = open_iov;
3245         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3246
3247         memset(&oparms, 0, sizeof(oparms));
3248         oparms.tcon = tcon;
3249         oparms.desired_access = FILE_READ_ATTRIBUTES;
3250         oparms.disposition = FILE_OPEN;
3251         oparms.create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT);
3252         oparms.fid = &fid;
3253         oparms.reconnect = false;
3254
3255         rc = SMB2_open_init(tcon, server,
3256                             &rqst[0], &oplock, &oparms, utf16_path);
3257         if (rc)
3258                 goto query_rp_exit;
3259         smb2_set_next_command(tcon, &rqst[0]);
3260
3261
3262         /* IOCTL */
3263         memset(&io_iov, 0, sizeof(io_iov));
3264         rqst[1].rq_iov = io_iov;
3265         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3266
3267         rc = SMB2_ioctl_init(tcon, server,
3268                              &rqst[1], COMPOUND_FID,
3269                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT,
3270                              true /* is_fctl */, NULL, 0,
3271                              CIFSMaxBufSize -
3272                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3273                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3274         if (rc)
3275                 goto query_rp_exit;
3276
3277         smb2_set_next_command(tcon, &rqst[1]);
3278         smb2_set_related(&rqst[1]);
3279
3280
3281         /* Close */
3282         memset(&close_iov, 0, sizeof(close_iov));
3283         rqst[2].rq_iov = close_iov;
3284         rqst[2].rq_nvec = 1;
3285
3286         rc = SMB2_close_init(tcon, server,
3287                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3288         if (rc)
3289                 goto query_rp_exit;
3290
3291         smb2_set_related(&rqst[2]);
3292
3293         rc = compound_send_recv(xid, tcon->ses, server,
3294                                 flags, 3, rqst,
3295                                 resp_buftype, rsp_iov);
3296
3297         ioctl_rsp = rsp_iov[1].iov_base;
3298
3299         /*
3300          * Open was successful and we got an ioctl response.
3301          */
3302         if (rc == 0) {
3303                 /* See MS-FSCC 2.3.23 */
3304
3305                 reparse_buf = (struct reparse_data_buffer *)
3306                         ((char *)ioctl_rsp +
3307                          le32_to_cpu(ioctl_rsp->OutputOffset));
3308                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3309
3310                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3311                     rsp_iov[1].iov_len) {
3312                         cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3313                                  plen);
3314                         rc = -EIO;
3315                         goto query_rp_exit;
3316                 }
3317                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3318         }
3319
3320  query_rp_exit:
3321         kfree(utf16_path);
3322         SMB2_open_free(&rqst[0]);
3323         SMB2_ioctl_free(&rqst[1]);
3324         SMB2_close_free(&rqst[2]);
3325         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3326         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3327         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3328         return rc;
3329 }
3330
3331 static struct cifs_ntsd *
3332 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3333                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3334 {
3335         struct cifs_ntsd *pntsd = NULL;
3336         unsigned int xid;
3337         int rc = -EOPNOTSUPP;
3338         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3339
3340         if (IS_ERR(tlink))
3341                 return ERR_CAST(tlink);
3342
3343         xid = get_xid();
3344         cifs_dbg(FYI, "trying to get acl\n");
3345
3346         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3347                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3348                             info);
3349         free_xid(xid);
3350
3351         cifs_put_tlink(tlink);
3352
3353         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3354         if (rc)
3355                 return ERR_PTR(rc);
3356         return pntsd;
3357
3358 }
3359
3360 static struct cifs_ntsd *
3361 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3362                      const char *path, u32 *pacllen, u32 info)
3363 {
3364         struct cifs_ntsd *pntsd = NULL;
3365         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3366         unsigned int xid;
3367         int rc;
3368         struct cifs_tcon *tcon;
3369         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3370         struct cifs_fid fid;
3371         struct cifs_open_parms oparms;
3372         __le16 *utf16_path;
3373
3374         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3375         if (IS_ERR(tlink))
3376                 return ERR_CAST(tlink);
3377
3378         tcon = tlink_tcon(tlink);
3379         xid = get_xid();
3380
3381         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3382         if (!utf16_path) {
3383                 rc = -ENOMEM;
3384                 free_xid(xid);
3385                 return ERR_PTR(rc);
3386         }
3387
3388         oparms.tcon = tcon;
3389         oparms.desired_access = READ_CONTROL;
3390         oparms.disposition = FILE_OPEN;
3391         /*
3392          * When querying an ACL, even if the file is a symlink we want to open
3393          * the source not the target, and so the protocol requires that the
3394          * client specify this flag when opening a reparse point
3395          */
3396         oparms.create_options = cifs_create_options(cifs_sb, 0) | OPEN_REPARSE_POINT;
3397         oparms.fid = &fid;
3398         oparms.reconnect = false;
3399
3400         if (info & SACL_SECINFO)
3401                 oparms.desired_access |= SYSTEM_SECURITY;
3402
3403         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3404                        NULL);
3405         kfree(utf16_path);
3406         if (!rc) {
3407                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3408                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3409                                     info);
3410                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3411         }
3412
3413         cifs_put_tlink(tlink);
3414         free_xid(xid);
3415
3416         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3417         if (rc)
3418                 return ERR_PTR(rc);
3419         return pntsd;
3420 }
3421
3422 static int
3423 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3424                 struct inode *inode, const char *path, int aclflag)
3425 {
3426         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3427         unsigned int xid;
3428         int rc, access_flags = 0;
3429         struct cifs_tcon *tcon;
3430         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3431         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3432         struct cifs_fid fid;
3433         struct cifs_open_parms oparms;
3434         __le16 *utf16_path;
3435
3436         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3437         if (IS_ERR(tlink))
3438                 return PTR_ERR(tlink);
3439
3440         tcon = tlink_tcon(tlink);
3441         xid = get_xid();
3442
3443         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3444                 access_flags |= WRITE_OWNER;
3445         if (aclflag & CIFS_ACL_SACL)
3446                 access_flags |= SYSTEM_SECURITY;
3447         if (aclflag & CIFS_ACL_DACL)
3448                 access_flags |= WRITE_DAC;
3449
3450         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3451         if (!utf16_path) {
3452                 rc = -ENOMEM;
3453                 free_xid(xid);
3454                 return rc;
3455         }
3456
3457         oparms.tcon = tcon;
3458         oparms.desired_access = access_flags;
3459         oparms.create_options = cifs_create_options(cifs_sb, 0);
3460         oparms.disposition = FILE_OPEN;
3461         oparms.path = path;
3462         oparms.fid = &fid;
3463         oparms.reconnect = false;
3464
3465         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3466                        NULL, NULL);
3467         kfree(utf16_path);
3468         if (!rc) {
3469                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3470                             fid.volatile_fid, pnntsd, acllen, aclflag);
3471                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3472         }
3473
3474         cifs_put_tlink(tlink);
3475         free_xid(xid);
3476         return rc;
3477 }
3478
3479 /* Retrieve an ACL from the server */
3480 static struct cifs_ntsd *
3481 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3482              struct inode *inode, const char *path,
3483              u32 *pacllen, u32 info)
3484 {
3485         struct cifs_ntsd *pntsd = NULL;
3486         struct cifsFileInfo *open_file = NULL;
3487
3488         if (inode && !(info & SACL_SECINFO))
3489                 open_file = find_readable_file(CIFS_I(inode), true);
3490         if (!open_file || (info & SACL_SECINFO))
3491                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3492
3493         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3494         cifsFileInfo_put(open_file);
3495         return pntsd;
3496 }
3497
3498 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3499                             loff_t offset, loff_t len, bool keep_size)
3500 {
3501         struct cifs_ses *ses = tcon->ses;
3502         struct inode *inode;
3503         struct cifsInodeInfo *cifsi;
3504         struct cifsFileInfo *cfile = file->private_data;
3505         struct file_zero_data_information fsctl_buf;
3506         long rc;
3507         unsigned int xid;
3508         __le64 eof;
3509
3510         xid = get_xid();
3511
3512         inode = d_inode(cfile->dentry);
3513         cifsi = CIFS_I(inode);
3514
3515         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3516                               ses->Suid, offset, len);
3517
3518         /*
3519          * We zero the range through ioctl, so we need remove the page caches
3520          * first, otherwise the data may be inconsistent with the server.
3521          */
3522         truncate_pagecache_range(inode, offset, offset + len - 1);
3523
3524         /* if file not oplocked can't be sure whether asking to extend size */
3525         if (!CIFS_CACHE_READ(cifsi))
3526                 if (keep_size == false) {
3527                         rc = -EOPNOTSUPP;
3528                         trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3529                                 tcon->tid, ses->Suid, offset, len, rc);
3530                         free_xid(xid);
3531                         return rc;
3532                 }
3533
3534         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3535
3536         fsctl_buf.FileOffset = cpu_to_le64(offset);
3537         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3538
3539         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3540                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
3541                         (char *)&fsctl_buf,
3542                         sizeof(struct file_zero_data_information),
3543                         0, NULL, NULL);
3544         if (rc)
3545                 goto zero_range_exit;
3546
3547         /*
3548          * do we also need to change the size of the file?
3549          */
3550         if (keep_size == false && i_size_read(inode) < offset + len) {
3551                 eof = cpu_to_le64(offset + len);
3552                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3553                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3554         }
3555
3556  zero_range_exit:
3557         free_xid(xid);
3558         if (rc)
3559                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3560                               ses->Suid, offset, len, rc);
3561         else
3562                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3563                               ses->Suid, offset, len);
3564         return rc;
3565 }
3566
3567 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3568                             loff_t offset, loff_t len)
3569 {
3570         struct inode *inode;
3571         struct cifsFileInfo *cfile = file->private_data;
3572         struct file_zero_data_information fsctl_buf;
3573         long rc;
3574         unsigned int xid;
3575         __u8 set_sparse = 1;
3576
3577         xid = get_xid();
3578
3579         inode = d_inode(cfile->dentry);
3580
3581         /* Need to make file sparse, if not already, before freeing range. */
3582         /* Consider adding equivalent for compressed since it could also work */
3583         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3584                 rc = -EOPNOTSUPP;
3585                 free_xid(xid);
3586                 return rc;
3587         }
3588
3589         /*
3590          * We implement the punch hole through ioctl, so we need remove the page
3591          * caches first, otherwise the data may be inconsistent with the server.
3592          */
3593         truncate_pagecache_range(inode, offset, offset + len - 1);
3594
3595         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3596
3597         fsctl_buf.FileOffset = cpu_to_le64(offset);
3598         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3599
3600         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3601                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3602                         true /* is_fctl */, (char *)&fsctl_buf,
3603                         sizeof(struct file_zero_data_information),
3604                         CIFSMaxBufSize, NULL, NULL);
3605         free_xid(xid);
3606         return rc;
3607 }
3608
3609 static int smb3_simple_fallocate_write_range(unsigned int xid,
3610                                              struct cifs_tcon *tcon,
3611                                              struct cifsFileInfo *cfile,
3612                                              loff_t off, loff_t len,
3613                                              char *buf)
3614 {
3615         struct cifs_io_parms io_parms = {0};
3616         int nbytes;
3617         int rc = 0;
3618         struct kvec iov[2];
3619
3620         io_parms.netfid = cfile->fid.netfid;
3621         io_parms.pid = current->tgid;
3622         io_parms.tcon = tcon;
3623         io_parms.persistent_fid = cfile->fid.persistent_fid;
3624         io_parms.volatile_fid = cfile->fid.volatile_fid;
3625
3626         while (len) {
3627                 io_parms.offset = off;
3628                 io_parms.length = len;
3629                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3630                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3631                 /* iov[0] is reserved for smb header */
3632                 iov[1].iov_base = buf;
3633                 iov[1].iov_len = io_parms.length;
3634                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3635                 if (rc)
3636                         break;
3637                 if (nbytes > len)
3638                         return -EINVAL;
3639                 buf += nbytes;
3640                 off += nbytes;
3641                 len -= nbytes;
3642         }
3643         return rc;
3644 }
3645
3646 static int smb3_simple_fallocate_range(unsigned int xid,
3647                                        struct cifs_tcon *tcon,
3648                                        struct cifsFileInfo *cfile,
3649                                        loff_t off, loff_t len)
3650 {
3651         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3652         u32 out_data_len;
3653         char *buf = NULL;
3654         loff_t l;
3655         int rc;
3656
3657         in_data.file_offset = cpu_to_le64(off);
3658         in_data.length = cpu_to_le64(len);
3659         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3660                         cfile->fid.volatile_fid,
3661                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3662                         (char *)&in_data, sizeof(in_data),
3663                         1024 * sizeof(struct file_allocated_range_buffer),
3664                         (char **)&out_data, &out_data_len);
3665         if (rc)
3666                 goto out;
3667
3668         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3669         if (buf == NULL) {
3670                 rc = -ENOMEM;
3671                 goto out;
3672         }
3673
3674         tmp_data = out_data;
3675         while (len) {
3676                 /*
3677                  * The rest of the region is unmapped so write it all.
3678                  */
3679                 if (out_data_len == 0) {
3680                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3681                                                cfile, off, len, buf);
3682                         goto out;
3683                 }
3684
3685                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3686                         rc = -EINVAL;
3687                         goto out;
3688                 }
3689
3690                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3691                         /*
3692                          * We are at a hole. Write until the end of the region
3693                          * or until the next allocated data,
3694                          * whichever comes next.
3695                          */
3696                         l = le64_to_cpu(tmp_data->file_offset) - off;
3697                         if (len < l)
3698                                 l = len;
3699                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3700                                                cfile, off, l, buf);
3701                         if (rc)
3702                                 goto out;
3703                         off = off + l;
3704                         len = len - l;
3705                         if (len == 0)
3706                                 goto out;
3707                 }
3708                 /*
3709                  * We are at a section of allocated data, just skip forward
3710                  * until the end of the data or the end of the region
3711                  * we are supposed to fallocate, whichever comes first.
3712                  */
3713                 l = le64_to_cpu(tmp_data->length);
3714                 if (len < l)
3715                         l = len;
3716                 off += l;
3717                 len -= l;
3718
3719                 tmp_data = &tmp_data[1];
3720                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3721         }
3722
3723  out:
3724         kfree(out_data);
3725         kfree(buf);
3726         return rc;
3727 }
3728
3729
3730 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3731                             loff_t off, loff_t len, bool keep_size)
3732 {
3733         struct inode *inode;
3734         struct cifsInodeInfo *cifsi;
3735         struct cifsFileInfo *cfile = file->private_data;
3736         long rc = -EOPNOTSUPP;
3737         unsigned int xid;
3738         __le64 eof;
3739
3740         xid = get_xid();
3741
3742         inode = d_inode(cfile->dentry);
3743         cifsi = CIFS_I(inode);
3744
3745         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3746                                 tcon->ses->Suid, off, len);
3747         /* if file not oplocked can't be sure whether asking to extend size */
3748         if (!CIFS_CACHE_READ(cifsi))
3749                 if (keep_size == false) {
3750                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3751                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3752                         free_xid(xid);
3753                         return rc;
3754                 }
3755
3756         /*
3757          * Extending the file
3758          */
3759         if ((keep_size == false) && i_size_read(inode) < off + len) {
3760                 rc = inode_newsize_ok(inode, off + len);
3761                 if (rc)
3762                         goto out;
3763
3764                 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0)
3765                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3766
3767                 eof = cpu_to_le64(off + len);
3768                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3769                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3770                 if (rc == 0) {
3771                         cifsi->server_eof = off + len;
3772                         cifs_setsize(inode, off + len);
3773                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3774                         truncate_setsize(inode, off + len);
3775                 }
3776                 goto out;
3777         }
3778
3779         /*
3780          * Files are non-sparse by default so falloc may be a no-op
3781          * Must check if file sparse. If not sparse, and since we are not
3782          * extending then no need to do anything since file already allocated
3783          */
3784         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3785                 rc = 0;
3786                 goto out;
3787         }
3788
3789         if (keep_size == true) {
3790                 /*
3791                  * We can not preallocate pages beyond the end of the file
3792                  * in SMB2
3793                  */
3794                 if (off >= i_size_read(inode)) {
3795                         rc = 0;
3796                         goto out;
3797                 }
3798                 /*
3799                  * For fallocates that are partially beyond the end of file,
3800                  * clamp len so we only fallocate up to the end of file.
3801                  */
3802                 if (off + len > i_size_read(inode)) {
3803                         len = i_size_read(inode) - off;
3804                 }
3805         }
3806
3807         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3808                 /*
3809                  * At this point, we are trying to fallocate an internal
3810                  * regions of a sparse file. Since smb2 does not have a
3811                  * fallocate command we have two otions on how to emulate this.
3812                  * We can either turn the entire file to become non-sparse
3813                  * which we only do if the fallocate is for virtually
3814                  * the whole file,  or we can overwrite the region with zeroes
3815                  * using SMB2_write, which could be prohibitevly expensive
3816                  * if len is large.
3817                  */
3818                 /*
3819                  * We are only trying to fallocate a small region so
3820                  * just write it with zero.
3821                  */
3822                 if (len <= 1024 * 1024) {
3823                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3824                                                          off, len);
3825                         goto out;
3826                 }
3827
3828                 /*
3829                  * Check if falloc starts within first few pages of file
3830                  * and ends within a few pages of the end of file to
3831                  * ensure that most of file is being forced to be
3832                  * fallocated now. If so then setting whole file sparse
3833                  * ie potentially making a few extra pages at the beginning
3834                  * or end of the file non-sparse via set_sparse is harmless.
3835                  */
3836                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3837                         rc = -EOPNOTSUPP;
3838                         goto out;
3839                 }
3840         }
3841
3842         smb2_set_sparse(xid, tcon, cfile, inode, false);
3843         rc = 0;
3844
3845 out:
3846         if (rc)
3847                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3848                                 tcon->ses->Suid, off, len, rc);
3849         else
3850                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3851                                 tcon->ses->Suid, off, len);
3852
3853         free_xid(xid);
3854         return rc;
3855 }
3856
3857 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3858                             loff_t off, loff_t len)
3859 {
3860         int rc;
3861         unsigned int xid;
3862         struct cifsFileInfo *cfile = file->private_data;
3863         __le64 eof;
3864
3865         xid = get_xid();
3866
3867         if (off >= i_size_read(file->f_inode) ||
3868             off + len >= i_size_read(file->f_inode)) {
3869                 rc = -EINVAL;
3870                 goto out;
3871         }
3872
3873         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3874                                   i_size_read(file->f_inode) - off - len, off);
3875         if (rc < 0)
3876                 goto out;
3877
3878         eof = cpu_to_le64(i_size_read(file->f_inode) - len);
3879         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3880                           cfile->fid.volatile_fid, cfile->pid, &eof);
3881         if (rc < 0)
3882                 goto out;
3883
3884         rc = 0;
3885  out:
3886         free_xid(xid);
3887         return rc;
3888 }
3889
3890 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3891                               loff_t off, loff_t len)
3892 {
3893         int rc;
3894         unsigned int xid;
3895         struct cifsFileInfo *cfile = file->private_data;
3896         __le64 eof;
3897         __u64  count;
3898
3899         xid = get_xid();
3900
3901         if (off >= i_size_read(file->f_inode)) {
3902                 rc = -EINVAL;
3903                 goto out;
3904         }
3905
3906         count = i_size_read(file->f_inode) - off;
3907         eof = cpu_to_le64(i_size_read(file->f_inode) + len);
3908
3909         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3910                           cfile->fid.volatile_fid, cfile->pid, &eof);
3911         if (rc < 0)
3912                 goto out;
3913
3914         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3915         if (rc < 0)
3916                 goto out;
3917
3918         rc = smb3_zero_range(file, tcon, off, len, 1);
3919         if (rc < 0)
3920                 goto out;
3921
3922         rc = 0;
3923  out:
3924         free_xid(xid);
3925         return rc;
3926 }
3927
3928 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3929 {
3930         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3931         struct cifsInodeInfo *cifsi;
3932         struct inode *inode;
3933         int rc = 0;
3934         struct file_allocated_range_buffer in_data, *out_data = NULL;
3935         u32 out_data_len;
3936         unsigned int xid;
3937
3938         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3939                 return generic_file_llseek(file, offset, whence);
3940
3941         inode = d_inode(cfile->dentry);
3942         cifsi = CIFS_I(inode);
3943
3944         if (offset < 0 || offset >= i_size_read(inode))
3945                 return -ENXIO;
3946
3947         xid = get_xid();
3948         /*
3949          * We need to be sure that all dirty pages are written as they
3950          * might fill holes on the server.
3951          * Note that we also MUST flush any written pages since at least
3952          * some servers (Windows2016) will not reflect recent writes in
3953          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3954          */
3955         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3956         if (wrcfile) {
3957                 filemap_write_and_wait(inode->i_mapping);
3958                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3959                 cifsFileInfo_put(wrcfile);
3960         }
3961
3962         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3963                 if (whence == SEEK_HOLE)
3964                         offset = i_size_read(inode);
3965                 goto lseek_exit;
3966         }
3967
3968         in_data.file_offset = cpu_to_le64(offset);
3969         in_data.length = cpu_to_le64(i_size_read(inode));
3970
3971         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3972                         cfile->fid.volatile_fid,
3973                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3974                         (char *)&in_data, sizeof(in_data),
3975                         sizeof(struct file_allocated_range_buffer),
3976                         (char **)&out_data, &out_data_len);
3977         if (rc == -E2BIG)
3978                 rc = 0;
3979         if (rc)
3980                 goto lseek_exit;
3981
3982         if (whence == SEEK_HOLE && out_data_len == 0)
3983                 goto lseek_exit;
3984
3985         if (whence == SEEK_DATA && out_data_len == 0) {
3986                 rc = -ENXIO;
3987                 goto lseek_exit;
3988         }
3989
3990         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3991                 rc = -EINVAL;
3992                 goto lseek_exit;
3993         }
3994         if (whence == SEEK_DATA) {
3995                 offset = le64_to_cpu(out_data->file_offset);
3996                 goto lseek_exit;
3997         }
3998         if (offset < le64_to_cpu(out_data->file_offset))
3999                 goto lseek_exit;
4000
4001         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
4002
4003  lseek_exit:
4004         free_xid(xid);
4005         kfree(out_data);
4006         if (!rc)
4007                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
4008         else
4009                 return rc;
4010 }
4011
4012 static int smb3_fiemap(struct cifs_tcon *tcon,
4013                        struct cifsFileInfo *cfile,
4014                        struct fiemap_extent_info *fei, u64 start, u64 len)
4015 {
4016         unsigned int xid;
4017         struct file_allocated_range_buffer in_data, *out_data;
4018         u32 out_data_len;
4019         int i, num, rc, flags, last_blob;
4020         u64 next;
4021
4022         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
4023         if (rc)
4024                 return rc;
4025
4026         xid = get_xid();
4027  again:
4028         in_data.file_offset = cpu_to_le64(start);
4029         in_data.length = cpu_to_le64(len);
4030
4031         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
4032                         cfile->fid.volatile_fid,
4033                         FSCTL_QUERY_ALLOCATED_RANGES, true,
4034                         (char *)&in_data, sizeof(in_data),
4035                         1024 * sizeof(struct file_allocated_range_buffer),
4036                         (char **)&out_data, &out_data_len);
4037         if (rc == -E2BIG) {
4038                 last_blob = 0;
4039                 rc = 0;
4040         } else
4041                 last_blob = 1;
4042         if (rc)
4043                 goto out;
4044
4045         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
4046                 rc = -EINVAL;
4047                 goto out;
4048         }
4049         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
4050                 rc = -EINVAL;
4051                 goto out;
4052         }
4053
4054         num = out_data_len / sizeof(struct file_allocated_range_buffer);
4055         for (i = 0; i < num; i++) {
4056                 flags = 0;
4057                 if (i == num - 1 && last_blob)
4058                         flags |= FIEMAP_EXTENT_LAST;
4059
4060                 rc = fiemap_fill_next_extent(fei,
4061                                 le64_to_cpu(out_data[i].file_offset),
4062                                 le64_to_cpu(out_data[i].file_offset),
4063                                 le64_to_cpu(out_data[i].length),
4064                                 flags);
4065                 if (rc < 0)
4066                         goto out;
4067                 if (rc == 1) {
4068                         rc = 0;
4069                         goto out;
4070                 }
4071         }
4072
4073         if (!last_blob) {
4074                 next = le64_to_cpu(out_data[num - 1].file_offset) +
4075                   le64_to_cpu(out_data[num - 1].length);
4076                 len = len - (next - start);
4077                 start = next;
4078                 goto again;
4079         }
4080
4081  out:
4082         free_xid(xid);
4083         kfree(out_data);
4084         return rc;
4085 }
4086
4087 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
4088                            loff_t off, loff_t len)
4089 {
4090         /* KEEP_SIZE already checked for by do_fallocate */
4091         if (mode & FALLOC_FL_PUNCH_HOLE)
4092                 return smb3_punch_hole(file, tcon, off, len);
4093         else if (mode & FALLOC_FL_ZERO_RANGE) {
4094                 if (mode & FALLOC_FL_KEEP_SIZE)
4095                         return smb3_zero_range(file, tcon, off, len, true);
4096                 return smb3_zero_range(file, tcon, off, len, false);
4097         } else if (mode == FALLOC_FL_KEEP_SIZE)
4098                 return smb3_simple_falloc(file, tcon, off, len, true);
4099         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
4100                 return smb3_collapse_range(file, tcon, off, len);
4101         else if (mode == FALLOC_FL_INSERT_RANGE)
4102                 return smb3_insert_range(file, tcon, off, len);
4103         else if (mode == 0)
4104                 return smb3_simple_falloc(file, tcon, off, len, false);
4105
4106         return -EOPNOTSUPP;
4107 }
4108
4109 static void
4110 smb2_downgrade_oplock(struct TCP_Server_Info *server,
4111                       struct cifsInodeInfo *cinode, __u32 oplock,
4112                       unsigned int epoch, bool *purge_cache)
4113 {
4114         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
4115 }
4116
4117 static void
4118 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4119                        unsigned int epoch, bool *purge_cache);
4120
4121 static void
4122 smb3_downgrade_oplock(struct TCP_Server_Info *server,
4123                        struct cifsInodeInfo *cinode, __u32 oplock,
4124                        unsigned int epoch, bool *purge_cache)
4125 {
4126         unsigned int old_state = cinode->oplock;
4127         unsigned int old_epoch = cinode->epoch;
4128         unsigned int new_state;
4129
4130         if (epoch > old_epoch) {
4131                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
4132                 cinode->epoch = epoch;
4133         }
4134
4135         new_state = cinode->oplock;
4136         *purge_cache = false;
4137
4138         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
4139             (new_state & CIFS_CACHE_READ_FLG) == 0)
4140                 *purge_cache = true;
4141         else if (old_state == new_state && (epoch - old_epoch > 1))
4142                 *purge_cache = true;
4143 }
4144
4145 static void
4146 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4147                       unsigned int epoch, bool *purge_cache)
4148 {
4149         oplock &= 0xFF;
4150         cinode->lease_granted = false;
4151         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4152                 return;
4153         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
4154                 cinode->oplock = CIFS_CACHE_RHW_FLG;
4155                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
4156                          &cinode->vfs_inode);
4157         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
4158                 cinode->oplock = CIFS_CACHE_RW_FLG;
4159                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
4160                          &cinode->vfs_inode);
4161         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
4162                 cinode->oplock = CIFS_CACHE_READ_FLG;
4163                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
4164                          &cinode->vfs_inode);
4165         } else
4166                 cinode->oplock = 0;
4167 }
4168
4169 static void
4170 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4171                        unsigned int epoch, bool *purge_cache)
4172 {
4173         char message[5] = {0};
4174         unsigned int new_oplock = 0;
4175
4176         oplock &= 0xFF;
4177         cinode->lease_granted = true;
4178         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4179                 return;
4180
4181         /* Check if the server granted an oplock rather than a lease */
4182         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4183                 return smb2_set_oplock_level(cinode, oplock, epoch,
4184                                              purge_cache);
4185
4186         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4187                 new_oplock |= CIFS_CACHE_READ_FLG;
4188                 strcat(message, "R");
4189         }
4190         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4191                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4192                 strcat(message, "H");
4193         }
4194         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4195                 new_oplock |= CIFS_CACHE_WRITE_FLG;
4196                 strcat(message, "W");
4197         }
4198         if (!new_oplock)
4199                 strncpy(message, "None", sizeof(message));
4200
4201         cinode->oplock = new_oplock;
4202         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4203                  &cinode->vfs_inode);
4204 }
4205
4206 static void
4207 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4208                       unsigned int epoch, bool *purge_cache)
4209 {
4210         unsigned int old_oplock = cinode->oplock;
4211
4212         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4213
4214         if (purge_cache) {
4215                 *purge_cache = false;
4216                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4217                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4218                             (epoch - cinode->epoch > 0))
4219                                 *purge_cache = true;
4220                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4221                                  (epoch - cinode->epoch > 1))
4222                                 *purge_cache = true;
4223                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4224                                  (epoch - cinode->epoch > 1))
4225                                 *purge_cache = true;
4226                         else if (cinode->oplock == 0 &&
4227                                  (epoch - cinode->epoch > 0))
4228                                 *purge_cache = true;
4229                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4230                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4231                             (epoch - cinode->epoch > 0))
4232                                 *purge_cache = true;
4233                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4234                                  (epoch - cinode->epoch > 1))
4235                                 *purge_cache = true;
4236                 }
4237                 cinode->epoch = epoch;
4238         }
4239 }
4240
4241 static bool
4242 smb2_is_read_op(__u32 oplock)
4243 {
4244         return oplock == SMB2_OPLOCK_LEVEL_II;
4245 }
4246
4247 static bool
4248 smb21_is_read_op(__u32 oplock)
4249 {
4250         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4251                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4252 }
4253
4254 static __le32
4255 map_oplock_to_lease(u8 oplock)
4256 {
4257         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4258                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
4259         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4260                 return SMB2_LEASE_READ_CACHING;
4261         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4262                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
4263                        SMB2_LEASE_WRITE_CACHING;
4264         return 0;
4265 }
4266
4267 static char *
4268 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4269 {
4270         struct create_lease *buf;
4271
4272         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4273         if (!buf)
4274                 return NULL;
4275
4276         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4277         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4278
4279         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4280                                         (struct create_lease, lcontext));
4281         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4282         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4283                                 (struct create_lease, Name));
4284         buf->ccontext.NameLength = cpu_to_le16(4);
4285         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4286         buf->Name[0] = 'R';
4287         buf->Name[1] = 'q';
4288         buf->Name[2] = 'L';
4289         buf->Name[3] = 's';
4290         return (char *)buf;
4291 }
4292
4293 static char *
4294 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4295 {
4296         struct create_lease_v2 *buf;
4297
4298         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4299         if (!buf)
4300                 return NULL;
4301
4302         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4303         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4304
4305         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4306                                         (struct create_lease_v2, lcontext));
4307         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4308         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4309                                 (struct create_lease_v2, Name));
4310         buf->ccontext.NameLength = cpu_to_le16(4);
4311         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4312         buf->Name[0] = 'R';
4313         buf->Name[1] = 'q';
4314         buf->Name[2] = 'L';
4315         buf->Name[3] = 's';
4316         return (char *)buf;
4317 }
4318
4319 static __u8
4320 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4321 {
4322         struct create_lease *lc = (struct create_lease *)buf;
4323
4324         *epoch = 0; /* not used */
4325         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
4326                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4327         return le32_to_cpu(lc->lcontext.LeaseState);
4328 }
4329
4330 static __u8
4331 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4332 {
4333         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4334
4335         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4336         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
4337                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4338         if (lease_key)
4339                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4340         return le32_to_cpu(lc->lcontext.LeaseState);
4341 }
4342
4343 static unsigned int
4344 smb2_wp_retry_size(struct inode *inode)
4345 {
4346         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4347                      SMB2_MAX_BUFFER_SIZE);
4348 }
4349
4350 static bool
4351 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4352 {
4353         return !cfile->invalidHandle;
4354 }
4355
4356 static void
4357 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4358                    struct smb_rqst *old_rq, __le16 cipher_type)
4359 {
4360         struct smb2_sync_hdr *shdr =
4361                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
4362
4363         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4364         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4365         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4366         tr_hdr->Flags = cpu_to_le16(0x01);
4367         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4368             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4369                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4370         else
4371                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4372         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4373 }
4374
4375 /* We can not use the normal sg_set_buf() as we will sometimes pass a
4376  * stack object as buf.
4377  */
4378 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
4379                                    unsigned int buflen)
4380 {
4381         void *addr;
4382         /*
4383          * VMAP_STACK (at least) puts stack into the vmalloc address space
4384          */
4385         if (is_vmalloc_addr(buf))
4386                 addr = vmalloc_to_page(buf);
4387         else
4388                 addr = virt_to_page(buf);
4389         sg_set_page(sg, addr, buflen, offset_in_page(buf));
4390 }
4391
4392 /* Assumes the first rqst has a transform header as the first iov.
4393  * I.e.
4394  * rqst[0].rq_iov[0]  is transform header
4395  * rqst[0].rq_iov[1+] data to be encrypted/decrypted
4396  * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
4397  */
4398 static struct scatterlist *
4399 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
4400 {
4401         unsigned int sg_len;
4402         struct scatterlist *sg;
4403         unsigned int i;
4404         unsigned int j;
4405         unsigned int idx = 0;
4406         int skip;
4407
4408         sg_len = 1;
4409         for (i = 0; i < num_rqst; i++)
4410                 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
4411
4412         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
4413         if (!sg)
4414                 return NULL;
4415
4416         sg_init_table(sg, sg_len);
4417         for (i = 0; i < num_rqst; i++) {
4418                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4419                         /*
4420                          * The first rqst has a transform header where the
4421                          * first 20 bytes are not part of the encrypted blob
4422                          */
4423                         skip = (i == 0) && (j == 0) ? 20 : 0;
4424                         smb2_sg_set_buf(&sg[idx++],
4425                                         rqst[i].rq_iov[j].iov_base + skip,
4426                                         rqst[i].rq_iov[j].iov_len - skip);
4427                         }
4428
4429                 for (j = 0; j < rqst[i].rq_npages; j++) {
4430                         unsigned int len, offset;
4431
4432                         rqst_page_get_length(&rqst[i], j, &len, &offset);
4433                         sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
4434                 }
4435         }
4436         smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
4437         return sg;
4438 }
4439
4440 static int
4441 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4442 {
4443         struct cifs_ses *ses;
4444         u8 *ses_enc_key;
4445
4446         spin_lock(&cifs_tcp_ses_lock);
4447         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
4448                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
4449                         if (ses->Suid == ses_id) {
4450                                 ses_enc_key = enc ? ses->smb3encryptionkey :
4451                                         ses->smb3decryptionkey;
4452                                 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4453                                 spin_unlock(&cifs_tcp_ses_lock);
4454                                 return 0;
4455                         }
4456                 }
4457         }
4458         spin_unlock(&cifs_tcp_ses_lock);
4459
4460         return -EAGAIN;
4461 }
4462 /*
4463  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4464  * iov[0]   - transform header (associate data),
4465  * iov[1-N] - SMB2 header and pages - data to encrypt.
4466  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4467  * untouched.
4468  */
4469 static int
4470 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4471               struct smb_rqst *rqst, int enc)
4472 {
4473         struct smb2_transform_hdr *tr_hdr =
4474                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4475         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4476         int rc = 0;
4477         struct scatterlist *sg;
4478         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4479         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4480         struct aead_request *req;
4481         char *iv;
4482         unsigned int iv_len;
4483         DECLARE_CRYPTO_WAIT(wait);
4484         struct crypto_aead *tfm;
4485         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4486
4487         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
4488         if (rc) {
4489                 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
4490                          enc ? "en" : "de");
4491                 return rc;
4492         }
4493
4494         rc = smb3_crypto_aead_allocate(server);
4495         if (rc) {
4496                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4497                 return rc;
4498         }
4499
4500         tfm = enc ? server->secmech.ccmaesencrypt :
4501                                                 server->secmech.ccmaesdecrypt;
4502
4503         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4504                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4505                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4506         else
4507                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4508
4509         if (rc) {
4510                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4511                 return rc;
4512         }
4513
4514         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4515         if (rc) {
4516                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4517                 return rc;
4518         }
4519
4520         req = aead_request_alloc(tfm, GFP_KERNEL);
4521         if (!req) {
4522                 cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
4523                 return -ENOMEM;
4524         }
4525
4526         if (!enc) {
4527                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4528                 crypt_len += SMB2_SIGNATURE_SIZE;
4529         }
4530
4531         sg = init_sg(num_rqst, rqst, sign);
4532         if (!sg) {
4533                 cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
4534                 rc = -ENOMEM;
4535                 goto free_req;
4536         }
4537
4538         iv_len = crypto_aead_ivsize(tfm);
4539         iv = kzalloc(iv_len, GFP_KERNEL);
4540         if (!iv) {
4541                 cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
4542                 rc = -ENOMEM;
4543                 goto free_sg;
4544         }
4545
4546         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4547             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4548                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4549         else {
4550                 iv[0] = 3;
4551                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4552         }
4553
4554         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4555         aead_request_set_ad(req, assoc_data_len);
4556
4557         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4558                                   crypto_req_done, &wait);
4559
4560         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4561                                 : crypto_aead_decrypt(req), &wait);
4562
4563         if (!rc && enc)
4564                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4565
4566         kfree(iv);
4567 free_sg:
4568         kfree(sg);
4569 free_req:
4570         kfree(req);
4571         return rc;
4572 }
4573
4574 void
4575 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4576 {
4577         int i, j;
4578
4579         for (i = 0; i < num_rqst; i++) {
4580                 if (rqst[i].rq_pages) {
4581                         for (j = rqst[i].rq_npages - 1; j >= 0; j--)
4582                                 put_page(rqst[i].rq_pages[j]);
4583                         kfree(rqst[i].rq_pages);
4584                 }
4585         }
4586 }
4587
4588 /*
4589  * This function will initialize new_rq and encrypt the content.
4590  * The first entry, new_rq[0], only contains a single iov which contains
4591  * a smb2_transform_hdr and is pre-allocated by the caller.
4592  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4593  *
4594  * The end result is an array of smb_rqst structures where the first structure
4595  * only contains a single iov for the transform header which we then can pass
4596  * to crypt_message().
4597  *
4598  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4599  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4600  */
4601 static int
4602 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4603                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4604 {
4605         struct page **pages;
4606         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4607         unsigned int npages;
4608         unsigned int orig_len = 0;
4609         int i, j;
4610         int rc = -ENOMEM;
4611
4612         for (i = 1; i < num_rqst; i++) {
4613                 npages = old_rq[i - 1].rq_npages;
4614                 pages = kmalloc_array(npages, sizeof(struct page *),
4615                                       GFP_KERNEL);
4616                 if (!pages)
4617                         goto err_free;
4618
4619                 new_rq[i].rq_pages = pages;
4620                 new_rq[i].rq_npages = npages;
4621                 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
4622                 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
4623                 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
4624                 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
4625                 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
4626
4627                 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
4628
4629                 for (j = 0; j < npages; j++) {
4630                         pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4631                         if (!pages[j])
4632                                 goto err_free;
4633                 }
4634
4635                 /* copy pages form the old */
4636                 for (j = 0; j < npages; j++) {
4637                         char *dst, *src;
4638                         unsigned int offset, len;
4639
4640                         rqst_page_get_length(&new_rq[i], j, &len, &offset);
4641
4642                         dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
4643                         src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
4644
4645                         memcpy(dst, src, len);
4646                         kunmap(new_rq[i].rq_pages[j]);
4647                         kunmap(old_rq[i - 1].rq_pages[j]);
4648                 }
4649         }
4650
4651         /* fill the 1st iov with a transform header */
4652         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4653
4654         rc = crypt_message(server, num_rqst, new_rq, 1);
4655         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4656         if (rc)
4657                 goto err_free;
4658
4659         return rc;
4660
4661 err_free:
4662         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4663         return rc;
4664 }
4665
4666 static int
4667 smb3_is_transform_hdr(void *buf)
4668 {
4669         struct smb2_transform_hdr *trhdr = buf;
4670
4671         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4672 }
4673
4674 static int
4675 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4676                  unsigned int buf_data_size, struct page **pages,
4677                  unsigned int npages, unsigned int page_data_size,
4678                  bool is_offloaded)
4679 {
4680         struct kvec iov[2];
4681         struct smb_rqst rqst = {NULL};
4682         int rc;
4683
4684         iov[0].iov_base = buf;
4685         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4686         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4687         iov[1].iov_len = buf_data_size;
4688
4689         rqst.rq_iov = iov;
4690         rqst.rq_nvec = 2;
4691         rqst.rq_pages = pages;
4692         rqst.rq_npages = npages;
4693         rqst.rq_pagesz = PAGE_SIZE;
4694         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
4695
4696         rc = crypt_message(server, 1, &rqst, 0);
4697         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4698
4699         if (rc)
4700                 return rc;
4701
4702         memmove(buf, iov[1].iov_base, buf_data_size);
4703
4704         if (!is_offloaded)
4705                 server->total_read = buf_data_size + page_data_size;
4706
4707         return rc;
4708 }
4709
4710 static int
4711 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4712                      unsigned int npages, unsigned int len)
4713 {
4714         int i;
4715         int length;
4716
4717         for (i = 0; i < npages; i++) {
4718                 struct page *page = pages[i];
4719                 size_t n;
4720
4721                 n = len;
4722                 if (len >= PAGE_SIZE) {
4723                         /* enough data to fill the page */
4724                         n = PAGE_SIZE;
4725                         len -= n;
4726                 } else {
4727                         zero_user(page, len, PAGE_SIZE - len);
4728                         len = 0;
4729                 }
4730                 length = cifs_read_page_from_socket(server, page, 0, n);
4731                 if (length < 0)
4732                         return length;
4733                 server->total_read += length;
4734         }
4735
4736         return 0;
4737 }
4738
4739 static int
4740 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4741                unsigned int cur_off, struct bio_vec **page_vec)
4742 {
4743         struct bio_vec *bvec;
4744         int i;
4745
4746         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4747         if (!bvec)
4748                 return -ENOMEM;
4749
4750         for (i = 0; i < npages; i++) {
4751                 bvec[i].bv_page = pages[i];
4752                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4753                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4754                 data_size -= bvec[i].bv_len;
4755         }
4756
4757         if (data_size != 0) {
4758                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4759                 kfree(bvec);
4760                 return -EIO;
4761         }
4762
4763         *page_vec = bvec;
4764         return 0;
4765 }
4766
4767 static int
4768 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4769                  char *buf, unsigned int buf_len, struct page **pages,
4770                  unsigned int npages, unsigned int page_data_size,
4771                  bool is_offloaded)
4772 {
4773         unsigned int data_offset;
4774         unsigned int data_len;
4775         unsigned int cur_off;
4776         unsigned int cur_page_idx;
4777         unsigned int pad_len;
4778         struct cifs_readdata *rdata = mid->callback_data;
4779         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4780         struct bio_vec *bvec = NULL;
4781         struct iov_iter iter;
4782         struct kvec iov;
4783         int length;
4784         bool use_rdma_mr = false;
4785
4786         if (shdr->Command != SMB2_READ) {
4787                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4788                 return -ENOTSUPP;
4789         }
4790
4791         if (server->ops->is_session_expired &&
4792             server->ops->is_session_expired(buf)) {
4793                 if (!is_offloaded)
4794                         cifs_reconnect(server);
4795                 return -1;
4796         }
4797
4798         if (server->ops->is_status_pending &&
4799                         server->ops->is_status_pending(buf, server))
4800                 return -1;
4801
4802         /* set up first two iov to get credits */
4803         rdata->iov[0].iov_base = buf;
4804         rdata->iov[0].iov_len = 0;
4805         rdata->iov[1].iov_base = buf;
4806         rdata->iov[1].iov_len =
4807                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4808         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4809                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4810         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4811                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4812
4813         rdata->result = server->ops->map_error(buf, true);
4814         if (rdata->result != 0) {
4815                 cifs_dbg(FYI, "%s: server returned error %d\n",
4816                          __func__, rdata->result);
4817                 /* normal error on read response */
4818                 if (is_offloaded)
4819                         mid->mid_state = MID_RESPONSE_RECEIVED;
4820                 else
4821                         dequeue_mid(mid, false);
4822                 return 0;
4823         }
4824
4825         data_offset = server->ops->read_data_offset(buf);
4826 #ifdef CONFIG_CIFS_SMB_DIRECT
4827         use_rdma_mr = rdata->mr;
4828 #endif
4829         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4830
4831         if (data_offset < server->vals->read_rsp_size) {
4832                 /*
4833                  * win2k8 sometimes sends an offset of 0 when the read
4834                  * is beyond the EOF. Treat it as if the data starts just after
4835                  * the header.
4836                  */
4837                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4838                          __func__, data_offset);
4839                 data_offset = server->vals->read_rsp_size;
4840         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4841                 /* data_offset is beyond the end of smallbuf */
4842                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4843                          __func__, data_offset);
4844                 rdata->result = -EIO;
4845                 if (is_offloaded)
4846                         mid->mid_state = MID_RESPONSE_MALFORMED;
4847                 else
4848                         dequeue_mid(mid, rdata->result);
4849                 return 0;
4850         }
4851
4852         pad_len = data_offset - server->vals->read_rsp_size;
4853
4854         if (buf_len <= data_offset) {
4855                 /* read response payload is in pages */
4856                 cur_page_idx = pad_len / PAGE_SIZE;
4857                 cur_off = pad_len % PAGE_SIZE;
4858
4859                 if (cur_page_idx != 0) {
4860                         /* data offset is beyond the 1st page of response */
4861                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4862                                  __func__, data_offset);
4863                         rdata->result = -EIO;
4864                         if (is_offloaded)
4865                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4866                         else
4867                                 dequeue_mid(mid, rdata->result);
4868                         return 0;
4869                 }
4870
4871                 if (data_len > page_data_size - pad_len) {
4872                         /* data_len is corrupt -- discard frame */
4873                         rdata->result = -EIO;
4874                         if (is_offloaded)
4875                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4876                         else
4877                                 dequeue_mid(mid, rdata->result);
4878                         return 0;
4879                 }
4880
4881                 rdata->result = init_read_bvec(pages, npages, page_data_size,
4882                                                cur_off, &bvec);
4883                 if (rdata->result != 0) {
4884                         if (is_offloaded)
4885                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4886                         else
4887                                 dequeue_mid(mid, rdata->result);
4888                         return 0;
4889                 }
4890
4891                 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4892         } else if (buf_len >= data_offset + data_len) {
4893                 /* read response payload is in buf */
4894                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4895                 iov.iov_base = buf + data_offset;
4896                 iov.iov_len = data_len;
4897                 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4898         } else {
4899                 /* read response payload cannot be in both buf and pages */
4900                 WARN_ONCE(1, "buf can not contain only a part of read data");
4901                 rdata->result = -EIO;
4902                 if (is_offloaded)
4903                         mid->mid_state = MID_RESPONSE_MALFORMED;
4904                 else
4905                         dequeue_mid(mid, rdata->result);
4906                 return 0;
4907         }
4908
4909         length = rdata->copy_into_pages(server, rdata, &iter);
4910
4911         kfree(bvec);
4912
4913         if (length < 0)
4914                 return length;
4915
4916         if (is_offloaded)
4917                 mid->mid_state = MID_RESPONSE_RECEIVED;
4918         else
4919                 dequeue_mid(mid, false);
4920         return length;
4921 }
4922
4923 struct smb2_decrypt_work {
4924         struct work_struct decrypt;
4925         struct TCP_Server_Info *server;
4926         struct page **ppages;
4927         char *buf;
4928         unsigned int npages;
4929         unsigned int len;
4930 };
4931
4932
4933 static void smb2_decrypt_offload(struct work_struct *work)
4934 {
4935         struct smb2_decrypt_work *dw = container_of(work,
4936                                 struct smb2_decrypt_work, decrypt);
4937         int i, rc;
4938         struct mid_q_entry *mid;
4939
4940         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4941                               dw->ppages, dw->npages, dw->len, true);
4942         if (rc) {
4943                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4944                 goto free_pages;
4945         }
4946
4947         dw->server->lstrp = jiffies;
4948         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4949         if (mid == NULL)
4950                 cifs_dbg(FYI, "mid not found\n");
4951         else {
4952                 mid->decrypted = true;
4953                 rc = handle_read_data(dw->server, mid, dw->buf,
4954                                       dw->server->vals->read_rsp_size,
4955                                       dw->ppages, dw->npages, dw->len,
4956                                       true);
4957                 if (rc >= 0) {
4958 #ifdef CONFIG_CIFS_STATS2
4959                         mid->when_received = jiffies;
4960 #endif
4961                         if (dw->server->ops->is_network_name_deleted)
4962                                 dw->server->ops->is_network_name_deleted(dw->buf,
4963                                                                          dw->server);
4964
4965                         mid->callback(mid);
4966                 } else {
4967                         spin_lock(&GlobalMid_Lock);
4968                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4969                                 mid->mid_state = MID_RETRY_NEEDED;
4970                                 spin_unlock(&GlobalMid_Lock);
4971                                 mid->callback(mid);
4972                         } else {
4973                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4974                                 mid->mid_flags &= ~(MID_DELETED);
4975                                 list_add_tail(&mid->qhead,
4976                                         &dw->server->pending_mid_q);
4977                                 spin_unlock(&GlobalMid_Lock);
4978                         }
4979                 }
4980                 cifs_mid_q_entry_release(mid);
4981         }
4982
4983 free_pages:
4984         for (i = dw->npages-1; i >= 0; i--)
4985                 put_page(dw->ppages[i]);
4986
4987         kfree(dw->ppages);
4988         cifs_small_buf_release(dw->buf);
4989         kfree(dw);
4990 }
4991
4992
4993 static int
4994 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4995                        int *num_mids)
4996 {
4997         char *buf = server->smallbuf;
4998         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4999         unsigned int npages;
5000         struct page **pages;
5001         unsigned int len;
5002         unsigned int buflen = server->pdu_size;
5003         int rc;
5004         int i = 0;
5005         struct smb2_decrypt_work *dw;
5006
5007         *num_mids = 1;
5008         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
5009                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
5010
5011         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
5012         if (rc < 0)
5013                 return rc;
5014         server->total_read += rc;
5015
5016         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
5017                 server->vals->read_rsp_size;
5018         npages = DIV_ROUND_UP(len, PAGE_SIZE);
5019
5020         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
5021         if (!pages) {
5022                 rc = -ENOMEM;
5023                 goto discard_data;
5024         }
5025
5026         for (; i < npages; i++) {
5027                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
5028                 if (!pages[i]) {
5029                         rc = -ENOMEM;
5030                         goto discard_data;
5031                 }
5032         }
5033
5034         /* read read data into pages */
5035         rc = read_data_into_pages(server, pages, npages, len);
5036         if (rc)
5037                 goto free_pages;
5038
5039         rc = cifs_discard_remaining_data(server);
5040         if (rc)
5041                 goto free_pages;
5042
5043         /*
5044          * For large reads, offload to different thread for better performance,
5045          * use more cores decrypting which can be expensive
5046          */
5047
5048         if ((server->min_offload) && (server->in_flight > 1) &&
5049             (server->pdu_size >= server->min_offload)) {
5050                 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
5051                 if (dw == NULL)
5052                         goto non_offloaded_decrypt;
5053
5054                 dw->buf = server->smallbuf;
5055                 server->smallbuf = (char *)cifs_small_buf_get();
5056
5057                 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
5058
5059                 dw->npages = npages;
5060                 dw->server = server;
5061                 dw->ppages = pages;
5062                 dw->len = len;
5063                 queue_work(decrypt_wq, &dw->decrypt);
5064                 *num_mids = 0; /* worker thread takes care of finding mid */
5065                 return -1;
5066         }
5067
5068 non_offloaded_decrypt:
5069         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
5070                               pages, npages, len, false);
5071         if (rc)
5072                 goto free_pages;
5073
5074         *mid = smb2_find_mid(server, buf);
5075         if (*mid == NULL)
5076                 cifs_dbg(FYI, "mid not found\n");
5077         else {
5078                 cifs_dbg(FYI, "mid found\n");
5079                 (*mid)->decrypted = true;
5080                 rc = handle_read_data(server, *mid, buf,
5081                                       server->vals->read_rsp_size,
5082                                       pages, npages, len, false);
5083                 if (rc >= 0) {
5084                         if (server->ops->is_network_name_deleted) {
5085                                 server->ops->is_network_name_deleted(buf,
5086                                                                 server);
5087                         }
5088                 }
5089         }
5090
5091 free_pages:
5092         for (i = i - 1; i >= 0; i--)
5093                 put_page(pages[i]);
5094         kfree(pages);
5095         return rc;
5096 discard_data:
5097         cifs_discard_remaining_data(server);
5098         goto free_pages;
5099 }
5100
5101 static int
5102 receive_encrypted_standard(struct TCP_Server_Info *server,
5103                            struct mid_q_entry **mids, char **bufs,
5104                            int *num_mids)
5105 {
5106         int ret, length;
5107         char *buf = server->smallbuf;
5108         struct smb2_sync_hdr *shdr;
5109         unsigned int pdu_length = server->pdu_size;
5110         unsigned int buf_size;
5111         struct mid_q_entry *mid_entry;
5112         int next_is_large;
5113         char *next_buffer = NULL;
5114
5115         *num_mids = 0;
5116
5117         /* switch to large buffer if too big for a small one */
5118         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
5119                 server->large_buf = true;
5120                 memcpy(server->bigbuf, buf, server->total_read);
5121                 buf = server->bigbuf;
5122         }
5123
5124         /* now read the rest */
5125         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
5126                                 pdu_length - HEADER_SIZE(server) + 1);
5127         if (length < 0)
5128                 return length;
5129         server->total_read += length;
5130
5131         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
5132         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0, false);
5133         if (length)
5134                 return length;
5135
5136         next_is_large = server->large_buf;
5137 one_more:
5138         shdr = (struct smb2_sync_hdr *)buf;
5139         if (shdr->NextCommand) {
5140                 if (next_is_large)
5141                         next_buffer = (char *)cifs_buf_get();
5142                 else
5143                         next_buffer = (char *)cifs_small_buf_get();
5144                 memcpy(next_buffer,
5145                        buf + le32_to_cpu(shdr->NextCommand),
5146                        pdu_length - le32_to_cpu(shdr->NextCommand));
5147         }
5148
5149         mid_entry = smb2_find_mid(server, buf);
5150         if (mid_entry == NULL)
5151                 cifs_dbg(FYI, "mid not found\n");
5152         else {
5153                 cifs_dbg(FYI, "mid found\n");
5154                 mid_entry->decrypted = true;
5155                 mid_entry->resp_buf_size = server->pdu_size;
5156         }
5157
5158         if (*num_mids >= MAX_COMPOUND) {
5159                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
5160                 return -1;
5161         }
5162         bufs[*num_mids] = buf;
5163         mids[(*num_mids)++] = mid_entry;
5164
5165         if (mid_entry && mid_entry->handle)
5166                 ret = mid_entry->handle(server, mid_entry);
5167         else
5168                 ret = cifs_handle_standard(server, mid_entry);
5169
5170         if (ret == 0 && shdr->NextCommand) {
5171                 pdu_length -= le32_to_cpu(shdr->NextCommand);
5172                 server->large_buf = next_is_large;
5173                 if (next_is_large)
5174                         server->bigbuf = buf = next_buffer;
5175                 else
5176                         server->smallbuf = buf = next_buffer;
5177                 goto one_more;
5178         } else if (ret != 0) {
5179                 /*
5180                  * ret != 0 here means that we didn't get to handle_mid() thus
5181                  * server->smallbuf and server->bigbuf are still valid. We need
5182                  * to free next_buffer because it is not going to be used
5183                  * anywhere.
5184                  */
5185                 if (next_is_large)
5186                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5187                 else
5188                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5189         }
5190
5191         return ret;
5192 }
5193
5194 static int
5195 smb3_receive_transform(struct TCP_Server_Info *server,
5196                        struct mid_q_entry **mids, char **bufs, int *num_mids)
5197 {
5198         char *buf = server->smallbuf;
5199         unsigned int pdu_length = server->pdu_size;
5200         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5201         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5202
5203         if (pdu_length < sizeof(struct smb2_transform_hdr) +
5204                                                 sizeof(struct smb2_sync_hdr)) {
5205                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5206                          pdu_length);
5207                 cifs_reconnect(server);
5208                 return -ECONNABORTED;
5209         }
5210
5211         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5212                 cifs_server_dbg(VFS, "Transform message is broken\n");
5213                 cifs_reconnect(server);
5214                 return -ECONNABORTED;
5215         }
5216
5217         /* TODO: add support for compounds containing READ. */
5218         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5219                 return receive_encrypted_read(server, &mids[0], num_mids);
5220         }
5221
5222         return receive_encrypted_standard(server, mids, bufs, num_mids);
5223 }
5224
5225 int
5226 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5227 {
5228         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5229
5230         return handle_read_data(server, mid, buf, server->pdu_size,
5231                                 NULL, 0, 0, false);
5232 }
5233
5234 static int
5235 smb2_next_header(char *buf)
5236 {
5237         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
5238         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5239
5240         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5241                 return sizeof(struct smb2_transform_hdr) +
5242                   le32_to_cpu(t_hdr->OriginalMessageSize);
5243
5244         return le32_to_cpu(hdr->NextCommand);
5245 }
5246
5247 static int
5248 smb2_make_node(unsigned int xid, struct inode *inode,
5249                struct dentry *dentry, struct cifs_tcon *tcon,
5250                const char *full_path, umode_t mode, dev_t dev)
5251 {
5252         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5253         int rc = -EPERM;
5254         FILE_ALL_INFO *buf = NULL;
5255         struct cifs_io_parms io_parms = {0};
5256         __u32 oplock = 0;
5257         struct cifs_fid fid;
5258         struct cifs_open_parms oparms;
5259         unsigned int bytes_written;
5260         struct win_dev *pdev;
5261         struct kvec iov[2];
5262
5263         /*
5264          * Check if mounted with mount parm 'sfu' mount parm.
5265          * SFU emulation should work with all servers, but only
5266          * supports block and char device (no socket & fifo),
5267          * and was used by default in earlier versions of Windows
5268          */
5269         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5270                 goto out;
5271
5272         /*
5273          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5274          * their current NFS server) uses this approach to expose special files
5275          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5276          */
5277
5278         if (!S_ISCHR(mode) && !S_ISBLK(mode))
5279                 goto out;
5280
5281         cifs_dbg(FYI, "sfu compat create special file\n");
5282
5283         buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
5284         if (buf == NULL) {
5285                 rc = -ENOMEM;
5286                 goto out;
5287         }
5288
5289         oparms.tcon = tcon;
5290         oparms.cifs_sb = cifs_sb;
5291         oparms.desired_access = GENERIC_WRITE;
5292         oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5293                                                     CREATE_OPTION_SPECIAL);
5294         oparms.disposition = FILE_CREATE;
5295         oparms.path = full_path;
5296         oparms.fid = &fid;
5297         oparms.reconnect = false;
5298
5299         if (tcon->ses->server->oplocks)
5300                 oplock = REQ_OPLOCK;
5301         else
5302                 oplock = 0;
5303         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
5304         if (rc)
5305                 goto out;
5306
5307         /*
5308          * BB Do not bother to decode buf since no local inode yet to put
5309          * timestamps in, but we can reuse it safely.
5310          */
5311
5312         pdev = (struct win_dev *)buf;
5313         io_parms.pid = current->tgid;
5314         io_parms.tcon = tcon;
5315         io_parms.offset = 0;
5316         io_parms.length = sizeof(struct win_dev);
5317         iov[1].iov_base = buf;
5318         iov[1].iov_len = sizeof(struct win_dev);
5319         if (S_ISCHR(mode)) {
5320                 memcpy(pdev->type, "IntxCHR", 8);
5321                 pdev->major = cpu_to_le64(MAJOR(dev));
5322                 pdev->minor = cpu_to_le64(MINOR(dev));
5323                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5324                                                         &bytes_written, iov, 1);
5325         } else if (S_ISBLK(mode)) {
5326                 memcpy(pdev->type, "IntxBLK", 8);
5327                 pdev->major = cpu_to_le64(MAJOR(dev));
5328                 pdev->minor = cpu_to_le64(MINOR(dev));
5329                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5330                                                         &bytes_written, iov, 1);
5331         }
5332         tcon->ses->server->ops->close(xid, tcon, &fid);
5333         d_drop(dentry);
5334
5335         /* FIXME: add code here to set EAs */
5336 out:
5337         kfree(buf);
5338         return rc;
5339 }
5340
5341
5342 struct smb_version_operations smb20_operations = {
5343         .compare_fids = smb2_compare_fids,
5344         .setup_request = smb2_setup_request,
5345         .setup_async_request = smb2_setup_async_request,
5346         .check_receive = smb2_check_receive,
5347         .add_credits = smb2_add_credits,
5348         .set_credits = smb2_set_credits,
5349         .get_credits_field = smb2_get_credits_field,
5350         .get_credits = smb2_get_credits,
5351         .wait_mtu_credits = cifs_wait_mtu_credits,
5352         .get_next_mid = smb2_get_next_mid,
5353         .revert_current_mid = smb2_revert_current_mid,
5354         .read_data_offset = smb2_read_data_offset,
5355         .read_data_length = smb2_read_data_length,
5356         .map_error = map_smb2_to_linux_error,
5357         .find_mid = smb2_find_mid,
5358         .check_message = smb2_check_message,
5359         .dump_detail = smb2_dump_detail,
5360         .clear_stats = smb2_clear_stats,
5361         .print_stats = smb2_print_stats,
5362         .is_oplock_break = smb2_is_valid_oplock_break,
5363         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5364         .downgrade_oplock = smb2_downgrade_oplock,
5365         .need_neg = smb2_need_neg,
5366         .negotiate = smb2_negotiate,
5367         .negotiate_wsize = smb2_negotiate_wsize,
5368         .negotiate_rsize = smb2_negotiate_rsize,
5369         .sess_setup = SMB2_sess_setup,
5370         .logoff = SMB2_logoff,
5371         .tree_connect = SMB2_tcon,
5372         .tree_disconnect = SMB2_tdis,
5373         .qfs_tcon = smb2_qfs_tcon,
5374         .is_path_accessible = smb2_is_path_accessible,
5375         .can_echo = smb2_can_echo,
5376         .echo = SMB2_echo,
5377         .query_path_info = smb2_query_path_info,
5378         .get_srv_inum = smb2_get_srv_inum,
5379         .query_file_info = smb2_query_file_info,
5380         .set_path_size = smb2_set_path_size,
5381         .set_file_size = smb2_set_file_size,
5382         .set_file_info = smb2_set_file_info,
5383         .set_compression = smb2_set_compression,
5384         .mkdir = smb2_mkdir,
5385         .mkdir_setinfo = smb2_mkdir_setinfo,
5386         .rmdir = smb2_rmdir,
5387         .unlink = smb2_unlink,
5388         .rename = smb2_rename_path,
5389         .create_hardlink = smb2_create_hardlink,
5390         .query_symlink = smb2_query_symlink,
5391         .query_mf_symlink = smb3_query_mf_symlink,
5392         .create_mf_symlink = smb3_create_mf_symlink,
5393         .open = smb2_open_file,
5394         .set_fid = smb2_set_fid,
5395         .close = smb2_close_file,
5396         .flush = smb2_flush_file,
5397         .async_readv = smb2_async_readv,
5398         .async_writev = smb2_async_writev,
5399         .sync_read = smb2_sync_read,
5400         .sync_write = smb2_sync_write,
5401         .query_dir_first = smb2_query_dir_first,
5402         .query_dir_next = smb2_query_dir_next,
5403         .close_dir = smb2_close_dir,
5404         .calc_smb_size = smb2_calc_size,
5405         .is_status_pending = smb2_is_status_pending,
5406         .is_session_expired = smb2_is_session_expired,
5407         .oplock_response = smb2_oplock_response,
5408         .queryfs = smb2_queryfs,
5409         .mand_lock = smb2_mand_lock,
5410         .mand_unlock_range = smb2_unlock_range,
5411         .push_mand_locks = smb2_push_mandatory_locks,
5412         .get_lease_key = smb2_get_lease_key,
5413         .set_lease_key = smb2_set_lease_key,
5414         .new_lease_key = smb2_new_lease_key,
5415         .calc_signature = smb2_calc_signature,
5416         .is_read_op = smb2_is_read_op,
5417         .set_oplock_level = smb2_set_oplock_level,
5418         .create_lease_buf = smb2_create_lease_buf,
5419         .parse_lease_buf = smb2_parse_lease_buf,
5420         .copychunk_range = smb2_copychunk_range,
5421         .wp_retry_size = smb2_wp_retry_size,
5422         .dir_needs_close = smb2_dir_needs_close,
5423         .get_dfs_refer = smb2_get_dfs_refer,
5424         .select_sectype = smb2_select_sectype,
5425 #ifdef CONFIG_CIFS_XATTR
5426         .query_all_EAs = smb2_query_eas,
5427         .set_EA = smb2_set_ea,
5428 #endif /* CIFS_XATTR */
5429         .get_acl = get_smb2_acl,
5430         .get_acl_by_fid = get_smb2_acl_by_fid,
5431         .set_acl = set_smb2_acl,
5432         .next_header = smb2_next_header,
5433         .ioctl_query_info = smb2_ioctl_query_info,
5434         .make_node = smb2_make_node,
5435         .fiemap = smb3_fiemap,
5436         .llseek = smb3_llseek,
5437         .is_status_io_timeout = smb2_is_status_io_timeout,
5438         .is_network_name_deleted = smb2_is_network_name_deleted,
5439 };
5440
5441 struct smb_version_operations smb21_operations = {
5442         .compare_fids = smb2_compare_fids,
5443         .setup_request = smb2_setup_request,
5444         .setup_async_request = smb2_setup_async_request,
5445         .check_receive = smb2_check_receive,
5446         .add_credits = smb2_add_credits,
5447         .set_credits = smb2_set_credits,
5448         .get_credits_field = smb2_get_credits_field,
5449         .get_credits = smb2_get_credits,
5450         .wait_mtu_credits = smb2_wait_mtu_credits,
5451         .adjust_credits = smb2_adjust_credits,
5452         .get_next_mid = smb2_get_next_mid,
5453         .revert_current_mid = smb2_revert_current_mid,
5454         .read_data_offset = smb2_read_data_offset,
5455         .read_data_length = smb2_read_data_length,
5456         .map_error = map_smb2_to_linux_error,
5457         .find_mid = smb2_find_mid,
5458         .check_message = smb2_check_message,
5459         .dump_detail = smb2_dump_detail,
5460         .clear_stats = smb2_clear_stats,
5461         .print_stats = smb2_print_stats,
5462         .is_oplock_break = smb2_is_valid_oplock_break,
5463         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5464         .downgrade_oplock = smb2_downgrade_oplock,
5465         .need_neg = smb2_need_neg,
5466         .negotiate = smb2_negotiate,
5467         .negotiate_wsize = smb2_negotiate_wsize,
5468         .negotiate_rsize = smb2_negotiate_rsize,
5469         .sess_setup = SMB2_sess_setup,
5470         .logoff = SMB2_logoff,
5471         .tree_connect = SMB2_tcon,
5472         .tree_disconnect = SMB2_tdis,
5473         .qfs_tcon = smb2_qfs_tcon,
5474         .is_path_accessible = smb2_is_path_accessible,
5475         .can_echo = smb2_can_echo,
5476         .echo = SMB2_echo,
5477         .query_path_info = smb2_query_path_info,
5478         .get_srv_inum = smb2_get_srv_inum,
5479         .query_file_info = smb2_query_file_info,
5480         .set_path_size = smb2_set_path_size,
5481         .set_file_size = smb2_set_file_size,
5482         .set_file_info = smb2_set_file_info,
5483         .set_compression = smb2_set_compression,
5484         .mkdir = smb2_mkdir,
5485         .mkdir_setinfo = smb2_mkdir_setinfo,
5486         .rmdir = smb2_rmdir,
5487         .unlink = smb2_unlink,
5488         .rename = smb2_rename_path,
5489         .create_hardlink = smb2_create_hardlink,
5490         .query_symlink = smb2_query_symlink,
5491         .query_mf_symlink = smb3_query_mf_symlink,
5492         .create_mf_symlink = smb3_create_mf_symlink,
5493         .open = smb2_open_file,
5494         .set_fid = smb2_set_fid,
5495         .close = smb2_close_file,
5496         .flush = smb2_flush_file,
5497         .async_readv = smb2_async_readv,
5498         .async_writev = smb2_async_writev,
5499         .sync_read = smb2_sync_read,
5500         .sync_write = smb2_sync_write,
5501         .query_dir_first = smb2_query_dir_first,
5502         .query_dir_next = smb2_query_dir_next,
5503         .close_dir = smb2_close_dir,
5504         .calc_smb_size = smb2_calc_size,
5505         .is_status_pending = smb2_is_status_pending,
5506         .is_session_expired = smb2_is_session_expired,
5507         .oplock_response = smb2_oplock_response,
5508         .queryfs = smb2_queryfs,
5509         .mand_lock = smb2_mand_lock,
5510         .mand_unlock_range = smb2_unlock_range,
5511         .push_mand_locks = smb2_push_mandatory_locks,
5512         .get_lease_key = smb2_get_lease_key,
5513         .set_lease_key = smb2_set_lease_key,
5514         .new_lease_key = smb2_new_lease_key,
5515         .calc_signature = smb2_calc_signature,
5516         .is_read_op = smb21_is_read_op,
5517         .set_oplock_level = smb21_set_oplock_level,
5518         .create_lease_buf = smb2_create_lease_buf,
5519         .parse_lease_buf = smb2_parse_lease_buf,
5520         .copychunk_range = smb2_copychunk_range,
5521         .wp_retry_size = smb2_wp_retry_size,
5522         .dir_needs_close = smb2_dir_needs_close,
5523         .enum_snapshots = smb3_enum_snapshots,
5524         .notify = smb3_notify,
5525         .get_dfs_refer = smb2_get_dfs_refer,
5526         .select_sectype = smb2_select_sectype,
5527 #ifdef CONFIG_CIFS_XATTR
5528         .query_all_EAs = smb2_query_eas,
5529         .set_EA = smb2_set_ea,
5530 #endif /* CIFS_XATTR */
5531         .get_acl = get_smb2_acl,
5532         .get_acl_by_fid = get_smb2_acl_by_fid,
5533         .set_acl = set_smb2_acl,
5534         .next_header = smb2_next_header,
5535         .ioctl_query_info = smb2_ioctl_query_info,
5536         .make_node = smb2_make_node,
5537         .fiemap = smb3_fiemap,
5538         .llseek = smb3_llseek,
5539         .is_status_io_timeout = smb2_is_status_io_timeout,
5540         .is_network_name_deleted = smb2_is_network_name_deleted,
5541 };
5542
5543 struct smb_version_operations smb30_operations = {
5544         .compare_fids = smb2_compare_fids,
5545         .setup_request = smb2_setup_request,
5546         .setup_async_request = smb2_setup_async_request,
5547         .check_receive = smb2_check_receive,
5548         .add_credits = smb2_add_credits,
5549         .set_credits = smb2_set_credits,
5550         .get_credits_field = smb2_get_credits_field,
5551         .get_credits = smb2_get_credits,
5552         .wait_mtu_credits = smb2_wait_mtu_credits,
5553         .adjust_credits = smb2_adjust_credits,
5554         .get_next_mid = smb2_get_next_mid,
5555         .revert_current_mid = smb2_revert_current_mid,
5556         .read_data_offset = smb2_read_data_offset,
5557         .read_data_length = smb2_read_data_length,
5558         .map_error = map_smb2_to_linux_error,
5559         .find_mid = smb2_find_mid,
5560         .check_message = smb2_check_message,
5561         .dump_detail = smb2_dump_detail,
5562         .clear_stats = smb2_clear_stats,
5563         .print_stats = smb2_print_stats,
5564         .dump_share_caps = smb2_dump_share_caps,
5565         .is_oplock_break = smb2_is_valid_oplock_break,
5566         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5567         .downgrade_oplock = smb3_downgrade_oplock,
5568         .need_neg = smb2_need_neg,
5569         .negotiate = smb2_negotiate,
5570         .negotiate_wsize = smb3_negotiate_wsize,
5571         .negotiate_rsize = smb3_negotiate_rsize,
5572         .sess_setup = SMB2_sess_setup,
5573         .logoff = SMB2_logoff,
5574         .tree_connect = SMB2_tcon,
5575         .tree_disconnect = SMB2_tdis,
5576         .qfs_tcon = smb3_qfs_tcon,
5577         .is_path_accessible = smb2_is_path_accessible,
5578         .can_echo = smb2_can_echo,
5579         .echo = SMB2_echo,
5580         .query_path_info = smb2_query_path_info,
5581         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5582         .query_reparse_tag = smb2_query_reparse_tag,
5583         .get_srv_inum = smb2_get_srv_inum,
5584         .query_file_info = smb2_query_file_info,
5585         .set_path_size = smb2_set_path_size,
5586         .set_file_size = smb2_set_file_size,
5587         .set_file_info = smb2_set_file_info,
5588         .set_compression = smb2_set_compression,
5589         .mkdir = smb2_mkdir,
5590         .mkdir_setinfo = smb2_mkdir_setinfo,
5591         .rmdir = smb2_rmdir,
5592         .unlink = smb2_unlink,
5593         .rename = smb2_rename_path,
5594         .create_hardlink = smb2_create_hardlink,
5595         .query_symlink = smb2_query_symlink,
5596         .query_mf_symlink = smb3_query_mf_symlink,
5597         .create_mf_symlink = smb3_create_mf_symlink,
5598         .open = smb2_open_file,
5599         .set_fid = smb2_set_fid,
5600         .close = smb2_close_file,
5601         .close_getattr = smb2_close_getattr,
5602         .flush = smb2_flush_file,
5603         .async_readv = smb2_async_readv,
5604         .async_writev = smb2_async_writev,
5605         .sync_read = smb2_sync_read,
5606         .sync_write = smb2_sync_write,
5607         .query_dir_first = smb2_query_dir_first,
5608         .query_dir_next = smb2_query_dir_next,
5609         .close_dir = smb2_close_dir,
5610         .calc_smb_size = smb2_calc_size,
5611         .is_status_pending = smb2_is_status_pending,
5612         .is_session_expired = smb2_is_session_expired,
5613         .oplock_response = smb2_oplock_response,
5614         .queryfs = smb2_queryfs,
5615         .mand_lock = smb2_mand_lock,
5616         .mand_unlock_range = smb2_unlock_range,
5617         .push_mand_locks = smb2_push_mandatory_locks,
5618         .get_lease_key = smb2_get_lease_key,
5619         .set_lease_key = smb2_set_lease_key,
5620         .new_lease_key = smb2_new_lease_key,
5621         .generate_signingkey = generate_smb30signingkey,
5622         .calc_signature = smb3_calc_signature,
5623         .set_integrity  = smb3_set_integrity,
5624         .is_read_op = smb21_is_read_op,
5625         .set_oplock_level = smb3_set_oplock_level,
5626         .create_lease_buf = smb3_create_lease_buf,
5627         .parse_lease_buf = smb3_parse_lease_buf,
5628         .copychunk_range = smb2_copychunk_range,
5629         .duplicate_extents = smb2_duplicate_extents,
5630         .validate_negotiate = smb3_validate_negotiate,
5631         .wp_retry_size = smb2_wp_retry_size,
5632         .dir_needs_close = smb2_dir_needs_close,
5633         .fallocate = smb3_fallocate,
5634         .enum_snapshots = smb3_enum_snapshots,
5635         .notify = smb3_notify,
5636         .init_transform_rq = smb3_init_transform_rq,
5637         .is_transform_hdr = smb3_is_transform_hdr,
5638         .receive_transform = smb3_receive_transform,
5639         .get_dfs_refer = smb2_get_dfs_refer,
5640         .select_sectype = smb2_select_sectype,
5641 #ifdef CONFIG_CIFS_XATTR
5642         .query_all_EAs = smb2_query_eas,
5643         .set_EA = smb2_set_ea,
5644 #endif /* CIFS_XATTR */
5645         .get_acl = get_smb2_acl,
5646         .get_acl_by_fid = get_smb2_acl_by_fid,
5647         .set_acl = set_smb2_acl,
5648         .next_header = smb2_next_header,
5649         .ioctl_query_info = smb2_ioctl_query_info,
5650         .make_node = smb2_make_node,
5651         .fiemap = smb3_fiemap,
5652         .llseek = smb3_llseek,
5653         .is_status_io_timeout = smb2_is_status_io_timeout,
5654         .is_network_name_deleted = smb2_is_network_name_deleted,
5655 };
5656
5657 struct smb_version_operations smb311_operations = {
5658         .compare_fids = smb2_compare_fids,
5659         .setup_request = smb2_setup_request,
5660         .setup_async_request = smb2_setup_async_request,
5661         .check_receive = smb2_check_receive,
5662         .add_credits = smb2_add_credits,
5663         .set_credits = smb2_set_credits,
5664         .get_credits_field = smb2_get_credits_field,
5665         .get_credits = smb2_get_credits,
5666         .wait_mtu_credits = smb2_wait_mtu_credits,
5667         .adjust_credits = smb2_adjust_credits,
5668         .get_next_mid = smb2_get_next_mid,
5669         .revert_current_mid = smb2_revert_current_mid,
5670         .read_data_offset = smb2_read_data_offset,
5671         .read_data_length = smb2_read_data_length,
5672         .map_error = map_smb2_to_linux_error,
5673         .find_mid = smb2_find_mid,
5674         .check_message = smb2_check_message,
5675         .dump_detail = smb2_dump_detail,
5676         .clear_stats = smb2_clear_stats,
5677         .print_stats = smb2_print_stats,
5678         .dump_share_caps = smb2_dump_share_caps,
5679         .is_oplock_break = smb2_is_valid_oplock_break,
5680         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5681         .downgrade_oplock = smb3_downgrade_oplock,
5682         .need_neg = smb2_need_neg,
5683         .negotiate = smb2_negotiate,
5684         .negotiate_wsize = smb3_negotiate_wsize,
5685         .negotiate_rsize = smb3_negotiate_rsize,
5686         .sess_setup = SMB2_sess_setup,
5687         .logoff = SMB2_logoff,
5688         .tree_connect = SMB2_tcon,
5689         .tree_disconnect = SMB2_tdis,
5690         .qfs_tcon = smb3_qfs_tcon,
5691         .is_path_accessible = smb2_is_path_accessible,
5692         .can_echo = smb2_can_echo,
5693         .echo = SMB2_echo,
5694         .query_path_info = smb2_query_path_info,
5695         .query_reparse_tag = smb2_query_reparse_tag,
5696         .get_srv_inum = smb2_get_srv_inum,
5697         .query_file_info = smb2_query_file_info,
5698         .set_path_size = smb2_set_path_size,
5699         .set_file_size = smb2_set_file_size,
5700         .set_file_info = smb2_set_file_info,
5701         .set_compression = smb2_set_compression,
5702         .mkdir = smb2_mkdir,
5703         .mkdir_setinfo = smb2_mkdir_setinfo,
5704         .posix_mkdir = smb311_posix_mkdir,
5705         .rmdir = smb2_rmdir,
5706         .unlink = smb2_unlink,
5707         .rename = smb2_rename_path,
5708         .create_hardlink = smb2_create_hardlink,
5709         .query_symlink = smb2_query_symlink,
5710         .query_mf_symlink = smb3_query_mf_symlink,
5711         .create_mf_symlink = smb3_create_mf_symlink,
5712         .open = smb2_open_file,
5713         .set_fid = smb2_set_fid,
5714         .close = smb2_close_file,
5715         .close_getattr = smb2_close_getattr,
5716         .flush = smb2_flush_file,
5717         .async_readv = smb2_async_readv,
5718         .async_writev = smb2_async_writev,
5719         .sync_read = smb2_sync_read,
5720         .sync_write = smb2_sync_write,
5721         .query_dir_first = smb2_query_dir_first,
5722         .query_dir_next = smb2_query_dir_next,
5723         .close_dir = smb2_close_dir,
5724         .calc_smb_size = smb2_calc_size,
5725         .is_status_pending = smb2_is_status_pending,
5726         .is_session_expired = smb2_is_session_expired,
5727         .oplock_response = smb2_oplock_response,
5728         .queryfs = smb311_queryfs,
5729         .mand_lock = smb2_mand_lock,
5730         .mand_unlock_range = smb2_unlock_range,
5731         .push_mand_locks = smb2_push_mandatory_locks,
5732         .get_lease_key = smb2_get_lease_key,
5733         .set_lease_key = smb2_set_lease_key,
5734         .new_lease_key = smb2_new_lease_key,
5735         .generate_signingkey = generate_smb311signingkey,
5736         .calc_signature = smb3_calc_signature,
5737         .set_integrity  = smb3_set_integrity,
5738         .is_read_op = smb21_is_read_op,
5739         .set_oplock_level = smb3_set_oplock_level,
5740         .create_lease_buf = smb3_create_lease_buf,
5741         .parse_lease_buf = smb3_parse_lease_buf,
5742         .copychunk_range = smb2_copychunk_range,
5743         .duplicate_extents = smb2_duplicate_extents,
5744 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5745         .wp_retry_size = smb2_wp_retry_size,
5746         .dir_needs_close = smb2_dir_needs_close,
5747         .fallocate = smb3_fallocate,
5748         .enum_snapshots = smb3_enum_snapshots,
5749         .notify = smb3_notify,
5750         .init_transform_rq = smb3_init_transform_rq,
5751         .is_transform_hdr = smb3_is_transform_hdr,
5752         .receive_transform = smb3_receive_transform,
5753         .get_dfs_refer = smb2_get_dfs_refer,
5754         .select_sectype = smb2_select_sectype,
5755 #ifdef CONFIG_CIFS_XATTR
5756         .query_all_EAs = smb2_query_eas,
5757         .set_EA = smb2_set_ea,
5758 #endif /* CIFS_XATTR */
5759         .get_acl = get_smb2_acl,
5760         .get_acl_by_fid = get_smb2_acl_by_fid,
5761         .set_acl = set_smb2_acl,
5762         .next_header = smb2_next_header,
5763         .ioctl_query_info = smb2_ioctl_query_info,
5764         .make_node = smb2_make_node,
5765         .fiemap = smb3_fiemap,
5766         .llseek = smb3_llseek,
5767         .is_status_io_timeout = smb2_is_status_io_timeout,
5768         .is_network_name_deleted = smb2_is_network_name_deleted,
5769 };
5770
5771 struct smb_version_values smb20_values = {
5772         .version_string = SMB20_VERSION_STRING,
5773         .protocol_id = SMB20_PROT_ID,
5774         .req_capabilities = 0, /* MBZ */
5775         .large_lock_type = 0,
5776         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5777         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5778         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5779         .header_size = sizeof(struct smb2_sync_hdr),
5780         .header_preamble_size = 0,
5781         .max_header_size = MAX_SMB2_HDR_SIZE,
5782         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5783         .lock_cmd = SMB2_LOCK,
5784         .cap_unix = 0,
5785         .cap_nt_find = SMB2_NT_FIND,
5786         .cap_large_files = SMB2_LARGE_FILES,
5787         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5788         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5789         .create_lease_size = sizeof(struct create_lease),
5790 };
5791
5792 struct smb_version_values smb21_values = {
5793         .version_string = SMB21_VERSION_STRING,
5794         .protocol_id = SMB21_PROT_ID,
5795         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5796         .large_lock_type = 0,
5797         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5798         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5799         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5800         .header_size = sizeof(struct smb2_sync_hdr),
5801         .header_preamble_size = 0,
5802         .max_header_size = MAX_SMB2_HDR_SIZE,
5803         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5804         .lock_cmd = SMB2_LOCK,
5805         .cap_unix = 0,
5806         .cap_nt_find = SMB2_NT_FIND,
5807         .cap_large_files = SMB2_LARGE_FILES,
5808         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5809         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5810         .create_lease_size = sizeof(struct create_lease),
5811 };
5812
5813 struct smb_version_values smb3any_values = {
5814         .version_string = SMB3ANY_VERSION_STRING,
5815         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5816         .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,
5817         .large_lock_type = 0,
5818         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5819         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5820         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5821         .header_size = sizeof(struct smb2_sync_hdr),
5822         .header_preamble_size = 0,
5823         .max_header_size = MAX_SMB2_HDR_SIZE,
5824         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5825         .lock_cmd = SMB2_LOCK,
5826         .cap_unix = 0,
5827         .cap_nt_find = SMB2_NT_FIND,
5828         .cap_large_files = SMB2_LARGE_FILES,
5829         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5830         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5831         .create_lease_size = sizeof(struct create_lease_v2),
5832 };
5833
5834 struct smb_version_values smbdefault_values = {
5835         .version_string = SMBDEFAULT_VERSION_STRING,
5836         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5837         .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,
5838         .large_lock_type = 0,
5839         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5840         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5841         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5842         .header_size = sizeof(struct smb2_sync_hdr),
5843         .header_preamble_size = 0,
5844         .max_header_size = MAX_SMB2_HDR_SIZE,
5845         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5846         .lock_cmd = SMB2_LOCK,
5847         .cap_unix = 0,
5848         .cap_nt_find = SMB2_NT_FIND,
5849         .cap_large_files = SMB2_LARGE_FILES,
5850         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5851         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5852         .create_lease_size = sizeof(struct create_lease_v2),
5853 };
5854
5855 struct smb_version_values smb30_values = {
5856         .version_string = SMB30_VERSION_STRING,
5857         .protocol_id = SMB30_PROT_ID,
5858         .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,
5859         .large_lock_type = 0,
5860         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5861         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5862         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5863         .header_size = sizeof(struct smb2_sync_hdr),
5864         .header_preamble_size = 0,
5865         .max_header_size = MAX_SMB2_HDR_SIZE,
5866         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5867         .lock_cmd = SMB2_LOCK,
5868         .cap_unix = 0,
5869         .cap_nt_find = SMB2_NT_FIND,
5870         .cap_large_files = SMB2_LARGE_FILES,
5871         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5872         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5873         .create_lease_size = sizeof(struct create_lease_v2),
5874 };
5875
5876 struct smb_version_values smb302_values = {
5877         .version_string = SMB302_VERSION_STRING,
5878         .protocol_id = SMB302_PROT_ID,
5879         .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,
5880         .large_lock_type = 0,
5881         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5882         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5883         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5884         .header_size = sizeof(struct smb2_sync_hdr),
5885         .header_preamble_size = 0,
5886         .max_header_size = MAX_SMB2_HDR_SIZE,
5887         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5888         .lock_cmd = SMB2_LOCK,
5889         .cap_unix = 0,
5890         .cap_nt_find = SMB2_NT_FIND,
5891         .cap_large_files = SMB2_LARGE_FILES,
5892         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5893         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5894         .create_lease_size = sizeof(struct create_lease_v2),
5895 };
5896
5897 struct smb_version_values smb311_values = {
5898         .version_string = SMB311_VERSION_STRING,
5899         .protocol_id = SMB311_PROT_ID,
5900         .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,
5901         .large_lock_type = 0,
5902         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5903         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5904         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5905         .header_size = sizeof(struct smb2_sync_hdr),
5906         .header_preamble_size = 0,
5907         .max_header_size = MAX_SMB2_HDR_SIZE,
5908         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5909         .lock_cmd = SMB2_LOCK,
5910         .cap_unix = 0,
5911         .cap_nt_find = SMB2_NT_FIND,
5912         .cap_large_files = SMB2_LARGE_FILES,
5913         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5914         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5915         .create_lease_size = sizeof(struct create_lease_v2),
5916 };