fs/smb/client/smb2ops.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  SMB2 version specific operations
   4  *
   5  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   6  */
   7
   8 #include <linux/pagemap.h>
   9 #include <linux/vfs.h>
  10 #include <linux/falloc.h>
  11 #include <linux/scatterlist.h>
  12 #include <linux/uuid.h>
  13 #include <linux/sort.h>
  14 #include <crypto/aead.h>
  15 #include <linux/fiemap.h>
  16 #include <uapi/linux/magic.h>
  17 #include "cifsfs.h"
  18 #include "cifsglob.h"
  19 #include "smb2pdu.h"
  20 #include "smb2proto.h"
  21 #include "cifsproto.h"
  22 #include "cifs_debug.h"
  23 #include "cifs_unicode.h"
  24 #include "smb2status.h"
  25 #include "smb2glob.h"
  26 #include "cifs_ioctl.h"
  27 #include "smbdirect.h"
  28 #include "fscache.h"
  29 #include "fs_context.h"
  30 #include "cached_dir.h"
  31
  32 /* Change credits for different ops and return the total number of credits */
  33 static int
  34 change_conf(struct TCP_Server_Info *server)
  35 {
  36         server->credits += server->echo_credits + server->oplock_credits;
  37         server->oplock_credits = server->echo_credits = 0;
  38         switch (server->credits) {
  39         case 0:
  40                 return 0;
  41         case 1:
  42                 server->echoes = false;
  43                 server->oplocks = false;
  44                 break;
  45         case 2:
  46                 server->echoes = true;
  47                 server->oplocks = false;
  48                 server->echo_credits = 1;
  49                 break;
  50         default:
  51                 server->echoes = true;
  52                 if (enable_oplocks) {
  53                         server->oplocks = true;
  54                         server->oplock_credits = 1;
  55                 } else
  56                         server->oplocks = false;
  57
  58                 server->echo_credits = 1;
  59         }
  60         server->credits -= server->echo_credits + server->oplock_credits;
  61         return server->credits + server->echo_credits + server->oplock_credits;
  62 }
  63
  64 static void
  65 smb2_add_credits(struct TCP_Server_Info *server,
  66                  const struct cifs_credits *credits, const int optype)
  67 {
  68         int *val, rc = -1;
  69         int scredits, in_flight;
  70         unsigned int add = credits->value;
  71         unsigned int instance = credits->instance;
  72         bool reconnect_detected = false;
  73         bool reconnect_with_invalid_credits = false;
  74
  75         spin_lock(&server->req_lock);
  76         val = server->ops->get_credits_field(server, optype);
  77
  78         /* eg found case where write overlapping reconnect messed up credits */
  79         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  80                 reconnect_with_invalid_credits = true;
  81
  82         if ((instance == 0) || (instance == server->reconnect_instance))
  83                 *val += add;
  84         else
  85                 reconnect_detected = true;
  86
  87         if (*val > 65000) {
  88                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  89                 pr_warn_once("server overflowed SMB3 credits\n");
  90                 trace_smb3_overflow_credits(server->CurrentMid,
  91                                             server->conn_id, server->hostname, *val,
  92                                             add, server->in_flight);
  93         }
  94         server->in_flight--;
  95         if (server->in_flight == 0 &&
  96            ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
  97            ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
  98                 rc = change_conf(server);
  99         /*
 100          * Sometimes server returns 0 credits on oplock break ack - we need to
 101          * rebalance credits in this case.
 102          */
 103         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
 104                  server->oplocks) {
 105                 if (server->credits > 1) {
 106                         server->credits--;
 107                         server->oplock_credits++;
 108                 }
 109         }
 110         scredits = *val;
 111         in_flight = server->in_flight;
 112         spin_unlock(&server->req_lock);
 113         wake_up(&server->request_q);
 114
 115         if (reconnect_detected) {
 116                 trace_smb3_reconnect_detected(server->CurrentMid,
 117                         server->conn_id, server->hostname, scredits, add, in_flight);
 118
 119                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 120                          add, instance);
 121         }
 122
 123         if (reconnect_with_invalid_credits) {
 124                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
 125                         server->conn_id, server->hostname, scredits, add, in_flight);
 126                 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
 127                          optype, scredits, add);
 128         }
 129
 130         spin_lock(&server->srv_lock);
 131         if (server->tcpStatus == CifsNeedReconnect
 132             || server->tcpStatus == CifsExiting) {
 133                 spin_unlock(&server->srv_lock);
 134                 return;
 135         }
 136         spin_unlock(&server->srv_lock);
 137
 138         switch (rc) {
 139         case -1:
 140                 /* change_conf hasn't been executed */
 141                 break;
 142         case 0:
 143                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 144                 break;
 145         case 1:
 146                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 147                 break;
 148         case 2:
 149                 cifs_dbg(FYI, "disabling oplocks\n");
 150                 break;
 151         default:
 152                 /* change_conf rebalanced credits for different types */
 153                 break;
 154         }
 155
 156         trace_smb3_add_credits(server->CurrentMid,
 157                         server->conn_id, server->hostname, scredits, add, in_flight);
 158         cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
 159 }
 160
 161 static void
 162 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 163 {
 164         int scredits, in_flight;
 165
 166         spin_lock(&server->req_lock);
 167         server->credits = val;
 168         if (val == 1)
 169                 server->reconnect_instance++;
 170         scredits = server->credits;
 171         in_flight = server->in_flight;
 172         spin_unlock(&server->req_lock);
 173
 174         trace_smb3_set_credits(server->CurrentMid,
 175                         server->conn_id, server->hostname, scredits, val, in_flight);
 176         cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
 177
 178         /* don't log while holding the lock */
 179         if (val == 1)
 180                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 181 }
 182
 183 static int *
 184 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 185 {
 186         switch (optype) {
 187         case CIFS_ECHO_OP:
 188                 return &server->echo_credits;
 189         case CIFS_OBREAK_OP:
 190                 return &server->oplock_credits;
 191         default:
 192                 return &server->credits;
 193         }
 194 }
 195
 196 static unsigned int
 197 smb2_get_credits(struct mid_q_entry *mid)
 198 {
 199         return mid->credits_received;
 200 }
 201
 202 static int
 203 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 204                       unsigned int *num, struct cifs_credits *credits)
 205 {
 206         int rc = 0;
 207         unsigned int scredits, in_flight;
 208
 209         spin_lock(&server->req_lock);
 210         while (1) {
 211                 if (server->credits <= 0) {
 212                         spin_unlock(&server->req_lock);
 213                         cifs_num_waiters_inc(server);
 214                         rc = wait_event_killable(server->request_q,
 215                                 has_credits(server, &server->credits, 1));
 216                         cifs_num_waiters_dec(server);
 217                         if (rc)
 218                                 return rc;
 219                         spin_lock(&server->req_lock);
 220                 } else {
 221                         spin_unlock(&server->req_lock);
 222                         spin_lock(&server->srv_lock);
 223                         if (server->tcpStatus == CifsExiting) {
 224                                 spin_unlock(&server->srv_lock);
 225                                 return -ENOENT;
 226                         }
 227                         spin_unlock(&server->srv_lock);
 228
 229                         spin_lock(&server->req_lock);
 230                         scredits = server->credits;
 231                         /* can deadlock with reopen */
 232                         if (scredits <= 8) {
 233                                 *num = SMB2_MAX_BUFFER_SIZE;
 234                                 credits->value = 0;
 235                                 credits->instance = 0;
 236                                 break;
 237                         }
 238
 239                         /* leave some credits for reopen and other ops */
 240                         scredits -= 8;
 241                         *num = min_t(unsigned int, size,
 242                                      scredits * SMB2_MAX_BUFFER_SIZE);
 243
 244                         credits->value =
 245                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 246                         credits->instance = server->reconnect_instance;
 247                         server->credits -= credits->value;
 248                         server->in_flight++;
 249                         if (server->in_flight > server->max_in_flight)
 250                                 server->max_in_flight = server->in_flight;
 251                         break;
 252                 }
 253         }
 254         scredits = server->credits;
 255         in_flight = server->in_flight;
 256         spin_unlock(&server->req_lock);
 257
 258         trace_smb3_wait_credits(server->CurrentMid,
 259                         server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
 260         cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
 261                         __func__, credits->value, scredits);
 262
 263         return rc;
 264 }
 265
 266 static int
 267 smb2_adjust_credits(struct TCP_Server_Info *server,
 268                     struct cifs_credits *credits,
 269                     const unsigned int payload_size)
 270 {
 271         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 272         int scredits, in_flight;
 273
 274         if (!credits->value || credits->value == new_val)
 275                 return 0;
 276
 277         if (credits->value < new_val) {
 278                 trace_smb3_too_many_credits(server->CurrentMid,
 279                                 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
 280                 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
 281                                 credits->value, new_val);
 282
 283                 return -ENOTSUPP;
 284         }
 285
 286         spin_lock(&server->req_lock);
 287
 288         if (server->reconnect_instance != credits->instance) {
 289                 scredits = server->credits;
 290                 in_flight = server->in_flight;
 291                 spin_unlock(&server->req_lock);
 292
 293                 trace_smb3_reconnect_detected(server->CurrentMid,
 294                         server->conn_id, server->hostname, scredits,
 295                         credits->value - new_val, in_flight);
 296                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 297                          credits->value - new_val);
 298                 return -EAGAIN;
 299         }
 300
 301         server->credits += credits->value - new_val;
 302         scredits = server->credits;
 303         in_flight = server->in_flight;
 304         spin_unlock(&server->req_lock);
 305         wake_up(&server->request_q);
 306
 307         trace_smb3_adj_credits(server->CurrentMid,
 308                         server->conn_id, server->hostname, scredits,
 309                         credits->value - new_val, in_flight);
 310         cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
 311                         __func__, credits->value - new_val, scredits);
 312
 313         credits->value = new_val;
 314
 315         return 0;
 316 }
 317
 318 static __u64
 319 smb2_get_next_mid(struct TCP_Server_Info *server)
 320 {
 321         __u64 mid;
 322         /* for SMB2 we need the current value */
 323         spin_lock(&server->mid_lock);
 324         mid = server->CurrentMid++;
 325         spin_unlock(&server->mid_lock);
 326         return mid;
 327 }
 328
 329 static void
 330 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 331 {
 332         spin_lock(&server->mid_lock);
 333         if (server->CurrentMid >= val)
 334                 server->CurrentMid -= val;
 335         spin_unlock(&server->mid_lock);
 336 }
 337
 338 static struct mid_q_entry *
 339 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 340 {
 341         struct mid_q_entry *mid;
 342         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 343         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 344
 345         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 346                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 347                 return NULL;
 348         }
 349
 350         spin_lock(&server->mid_lock);
 351         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 352                 if ((mid->mid == wire_mid) &&
 353                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 354                     (mid->command == shdr->Command)) {
 355                         kref_get(&mid->refcount);
 356                         if (dequeue) {
 357                                 list_del_init(&mid->qhead);
 358                                 mid->mid_flags |= MID_DELETED;
 359                         }
 360                         spin_unlock(&server->mid_lock);
 361                         return mid;
 362                 }
 363         }
 364         spin_unlock(&server->mid_lock);
 365         return NULL;
 366 }
 367
 368 static struct mid_q_entry *
 369 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 370 {
 371         return __smb2_find_mid(server, buf, false);
 372 }
 373
 374 static struct mid_q_entry *
 375 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
 376 {
 377         return __smb2_find_mid(server, buf, true);
 378 }
 379
 380 static void
 381 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 382 {
 383 #ifdef CONFIG_CIFS_DEBUG2
 384         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 385
 386         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 387                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 388                  shdr->Id.SyncId.ProcessId);
 389         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 390                  server->ops->calc_smb_size(buf));
 391 #endif
 392 }
 393
 394 static bool
 395 smb2_need_neg(struct TCP_Server_Info *server)
 396 {
 397         return server->max_read == 0;
 398 }
 399
 400 static int
 401 smb2_negotiate(const unsigned int xid,
 402                struct cifs_ses *ses,
 403                struct TCP_Server_Info *server)
 404 {
 405         int rc;
 406
 407         spin_lock(&server->mid_lock);
 408         server->CurrentMid = 0;
 409         spin_unlock(&server->mid_lock);
 410         rc = SMB2_negotiate(xid, ses, server);
 411         /* BB we probably don't need to retry with modern servers */
 412         if (rc == -EAGAIN)
 413                 rc = -EHOSTDOWN;
 414         return rc;
 415 }
 416
 417 static unsigned int
 418 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 419 {
 420         struct TCP_Server_Info *server = tcon->ses->server;
 421         unsigned int wsize;
 422
 423         /* start with specified wsize, or default */
 424         wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
 425         wsize = min_t(unsigned int, wsize, server->max_write);
 426         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 427                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 428
 429         return wsize;
 430 }
 431
 432 static unsigned int
 433 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 434 {
 435         struct TCP_Server_Info *server = tcon->ses->server;
 436         unsigned int wsize;
 437
 438         /* start with specified wsize, or default */
 439         wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
 440         wsize = min_t(unsigned int, wsize, server->max_write);
 441 #ifdef CONFIG_CIFS_SMB_DIRECT
 442         if (server->rdma) {
 443                 if (server->sign)
 444                         /*
 445                          * Account for SMB2 data transfer packet header and
 446                          * possible encryption header
 447                          */
 448                         wsize = min_t(unsigned int,
 449                                 wsize,
 450                                 server->smbd_conn->max_fragmented_send_size -
 451                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 452                                         sizeof(struct smb2_transform_hdr));
 453                 else
 454                         wsize = min_t(unsigned int,
 455                                 wsize, server->smbd_conn->max_readwrite_size);
 456         }
 457 #endif
 458         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 459                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 460
 461         return wsize;
 462 }
 463
 464 static unsigned int
 465 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 466 {
 467         struct TCP_Server_Info *server = tcon->ses->server;
 468         unsigned int rsize;
 469
 470         /* start with specified rsize, or default */
 471         rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
 472         rsize = min_t(unsigned int, rsize, server->max_read);
 473
 474         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 475                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 476
 477         return rsize;
 478 }
 479
 480 static unsigned int
 481 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 482 {
 483         struct TCP_Server_Info *server = tcon->ses->server;
 484         unsigned int rsize;
 485
 486         /* start with specified rsize, or default */
 487         rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
 488         rsize = min_t(unsigned int, rsize, server->max_read);
 489 #ifdef CONFIG_CIFS_SMB_DIRECT
 490         if (server->rdma) {
 491                 if (server->sign)
 492                         /*
 493                          * Account for SMB2 data transfer packet header and
 494                          * possible encryption header
 495                          */
 496                         rsize = min_t(unsigned int,
 497                                 rsize,
 498                                 server->smbd_conn->max_fragmented_recv_size -
 499                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 500                                         sizeof(struct smb2_transform_hdr));
 501                 else
 502                         rsize = min_t(unsigned int,
 503                                 rsize, server->smbd_conn->max_readwrite_size);
 504         }
 505 #endif
 506
 507         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 508                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 509
 510         return rsize;
 511 }
 512
 513 static int
 514 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 515                         size_t buf_len, struct cifs_ses *ses, bool in_mount)
 516 {
 517         struct network_interface_info_ioctl_rsp *p;
 518         struct sockaddr_in *addr4;
 519         struct sockaddr_in6 *addr6;
 520         struct iface_info_ipv4 *p4;
 521         struct iface_info_ipv6 *p6;
 522         struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
 523         struct cifs_server_iface tmp_iface;
 524         ssize_t bytes_left;
 525         size_t next = 0;
 526         int nb_iface = 0;
 527         int rc = 0, ret = 0;
 528
 529         bytes_left = buf_len;
 530         p = buf;
 531
 532         spin_lock(&ses->iface_lock);
 533         /* do not query too frequently, this time with lock held */
 534         if (ses->iface_last_update &&
 535             time_before(jiffies, ses->iface_last_update +
 536                         (SMB_INTERFACE_POLL_INTERVAL * HZ))) {
 537                 spin_unlock(&ses->iface_lock);
 538                 return 0;
 539         }
 540
 541         /*
 542          * Go through iface_list and do kref_put to remove
 543          * any unused ifaces. ifaces in use will be removed
 544          * when the last user calls a kref_put on it
 545          */
 546         list_for_each_entry_safe(iface, niface, &ses->iface_list,
 547                                  iface_head) {
 548                 iface->is_active = 0;
 549                 kref_put(&iface->refcount, release_iface);
 550                 ses->iface_count--;
 551         }
 552         spin_unlock(&ses->iface_lock);
 553
 554         /*
 555          * Samba server e.g. can return an empty interface list in some cases,
 556          * which would only be a problem if we were requesting multichannel
 557          */
 558         if (bytes_left == 0) {
 559                 /* avoid spamming logs every 10 minutes, so log only in mount */
 560                 if ((ses->chan_max > 1) && in_mount)
 561                         cifs_dbg(VFS,
 562                                  "multichannel not available\n"
 563                                  "Empty network interface list returned by server %s\n",
 564                                  ses->server->hostname);
 565                 rc = -EINVAL;
 566                 goto out;
 567         }
 568
 569         while (bytes_left >= sizeof(*p)) {
 570                 memset(&tmp_iface, 0, sizeof(tmp_iface));
 571                 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
 572                 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 573                 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 574
 575                 switch (p->Family) {
 576                 /*
 577                  * The kernel and wire socket structures have the same
 578                  * layout and use network byte order but make the
 579                  * conversion explicit in case either one changes.
 580                  */
 581                 case INTERNETWORK:
 582                         addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
 583                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 584                         addr4->sin_family = AF_INET;
 585                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 586
 587                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 588                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 589
 590                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 591                                  &addr4->sin_addr);
 592                         break;
 593                 case INTERNETWORKV6:
 594                         addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
 595                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 596                         addr6->sin6_family = AF_INET6;
 597                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 598
 599                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 600                         addr6->sin6_flowinfo = 0;
 601                         addr6->sin6_scope_id = 0;
 602                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 603
 604                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 605                                  &addr6->sin6_addr);
 606                         break;
 607                 default:
 608                         cifs_dbg(VFS,
 609                                  "%s: skipping unsupported socket family\n",
 610                                  __func__);
 611                         goto next_iface;
 612                 }
 613
 614                 /*
 615                  * The iface_list is assumed to be sorted by speed.
 616                  * Check if the new interface exists in that list.
 617                  * NEVER change iface. it could be in use.
 618                  * Add a new one instead
 619                  */
 620                 spin_lock(&ses->iface_lock);
 621                 list_for_each_entry_safe(iface, niface, &ses->iface_list,
 622                                          iface_head) {
 623                         ret = iface_cmp(iface, &tmp_iface);
 624                         if (!ret) {
 625                                 /* just get a ref so that it doesn't get picked/freed */
 626                                 iface->is_active = 1;
 627                                 kref_get(&iface->refcount);
 628                                 ses->iface_count++;
 629                                 spin_unlock(&ses->iface_lock);
 630                                 goto next_iface;
 631                         } else if (ret < 0) {
 632                                 /* all remaining ifaces are slower */
 633                                 kref_get(&iface->refcount);
 634                                 break;
 635                         }
 636                 }
 637                 spin_unlock(&ses->iface_lock);
 638
 639                 /* no match. insert the entry in the list */
 640                 info = kmalloc(sizeof(struct cifs_server_iface),
 641                                GFP_KERNEL);
 642                 if (!info) {
 643                         rc = -ENOMEM;
 644                         goto out;
 645                 }
 646                 memcpy(info, &tmp_iface, sizeof(tmp_iface));
 647
 648                 /* add this new entry to the list */
 649                 kref_init(&info->refcount);
 650                 info->is_active = 1;
 651
 652                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
 653                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 654                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 655                          le32_to_cpu(p->Capability));
 656
 657                 spin_lock(&ses->iface_lock);
 658                 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
 659                         list_add_tail(&info->iface_head, &iface->iface_head);
 660                         kref_put(&iface->refcount, release_iface);
 661                 } else
 662                         list_add_tail(&info->iface_head, &ses->iface_list);
 663
 664                 ses->iface_count++;
 665                 spin_unlock(&ses->iface_lock);
 666                 ses->iface_last_update = jiffies;
 667 next_iface:
 668                 nb_iface++;
 669                 next = le32_to_cpu(p->Next);
 670                 if (!next) {
 671                         bytes_left -= sizeof(*p);
 672                         break;
 673                 }
 674                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 675                 bytes_left -= next;
 676         }
 677
 678         if (!nb_iface) {
 679                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 680                 rc = -EINVAL;
 681                 goto out;
 682         }
 683
 684         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 685         if ((bytes_left > 8) || p->Next)
 686                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 687
 688
 689         if (!ses->iface_count) {
 690                 rc = -EINVAL;
 691                 goto out;
 692         }
 693
 694 out:
 695         return rc;
 696 }
 697
 698 int
 699 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
 700 {
 701         int rc;
 702         unsigned int ret_data_len = 0;
 703         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 704         struct cifs_ses *ses = tcon->ses;
 705
 706         /* do not query too frequently */
 707         if (ses->iface_last_update &&
 708             time_before(jiffies, ses->iface_last_update +
 709                         (SMB_INTERFACE_POLL_INTERVAL * HZ)))
 710                 return 0;
 711
 712         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 713                         FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 714                         NULL /* no data input */, 0 /* no data input */,
 715                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 716         if (rc == -EOPNOTSUPP) {
 717                 cifs_dbg(FYI,
 718                          "server does not support query network interfaces\n");
 719                 ret_data_len = 0;
 720         } else if (rc != 0) {
 721                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 722                 goto out;
 723         }
 724
 725         rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
 726         if (rc)
 727                 goto out;
 728
 729 out:
 730         kfree(out_buf);
 731         return rc;
 732 }
 733
 734 static void
 735 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 736               struct cifs_sb_info *cifs_sb)
 737 {
 738         int rc;
 739         __le16 srch_path = 0; /* Null - open root of share */
 740         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 741         struct cifs_open_parms oparms;
 742         struct cifs_fid fid;
 743         struct cached_fid *cfid = NULL;
 744
 745         oparms = (struct cifs_open_parms) {
 746                 .tcon = tcon,
 747                 .path = "",
 748                 .desired_access = FILE_READ_ATTRIBUTES,
 749                 .disposition = FILE_OPEN,
 750                 .create_options = cifs_create_options(cifs_sb, 0),
 751                 .fid = &fid,
 752         };
 753
 754         rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
 755         if (rc == 0)
 756                 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
 757         else
 758                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 759                                NULL, NULL);
 760         if (rc)
 761                 return;
 762
 763         SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
 764
 765         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 766                         FS_ATTRIBUTE_INFORMATION);
 767         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 768                         FS_DEVICE_INFORMATION);
 769         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 770                         FS_VOLUME_INFORMATION);
 771         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 772                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 773         if (cfid == NULL)
 774                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 775         else
 776                 close_cached_dir(cfid);
 777 }
 778
 779 static void
 780 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 781               struct cifs_sb_info *cifs_sb)
 782 {
 783         int rc;
 784         __le16 srch_path = 0; /* Null - open root of share */
 785         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 786         struct cifs_open_parms oparms;
 787         struct cifs_fid fid;
 788
 789         oparms = (struct cifs_open_parms) {
 790                 .tcon = tcon,
 791                 .path = "",
 792                 .desired_access = FILE_READ_ATTRIBUTES,
 793                 .disposition = FILE_OPEN,
 794                 .create_options = cifs_create_options(cifs_sb, 0),
 795                 .fid = &fid,
 796         };
 797
 798         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 799                        NULL, NULL);
 800         if (rc)
 801                 return;
 802
 803         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 804                         FS_ATTRIBUTE_INFORMATION);
 805         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 806                         FS_DEVICE_INFORMATION);
 807         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 808 }
 809
 810 static int
 811 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 812                         struct cifs_sb_info *cifs_sb, const char *full_path)
 813 {
 814         __le16 *utf16_path;
 815         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 816         int err_buftype = CIFS_NO_BUFFER;
 817         struct cifs_open_parms oparms;
 818         struct kvec err_iov = {};
 819         struct cifs_fid fid;
 820         struct cached_fid *cfid;
 821         bool islink;
 822         int rc, rc2;
 823
 824         rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
 825         if (!rc) {
 826                 if (cfid->has_lease) {
 827                         close_cached_dir(cfid);
 828                         return 0;
 829                 }
 830                 close_cached_dir(cfid);
 831         }
 832
 833         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 834         if (!utf16_path)
 835                 return -ENOMEM;
 836
 837         oparms = (struct cifs_open_parms) {
 838                 .tcon = tcon,
 839                 .path = full_path,
 840                 .desired_access = FILE_READ_ATTRIBUTES,
 841                 .disposition = FILE_OPEN,
 842                 .create_options = cifs_create_options(cifs_sb, 0),
 843                 .fid = &fid,
 844         };
 845
 846         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
 847                        &err_iov, &err_buftype);
 848         if (rc) {
 849                 struct smb2_hdr *hdr = err_iov.iov_base;
 850
 851                 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
 852                         goto out;
 853
 854                 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
 855                         rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 856                                                              full_path, &islink);
 857                         if (rc2) {
 858                                 rc = rc2;
 859                                 goto out;
 860                         }
 861                         if (islink)
 862                                 rc = -EREMOTE;
 863                 }
 864                 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
 865                     (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
 866                         rc = -EOPNOTSUPP;
 867                 goto out;
 868         }
 869
 870         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 871
 872 out:
 873         free_rsp_buf(err_buftype, err_iov.iov_base);
 874         kfree(utf16_path);
 875         return rc;
 876 }
 877
 878 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 879                              struct cifs_sb_info *cifs_sb, const char *full_path,
 880                              u64 *uniqueid, struct cifs_open_info_data *data)
 881 {
 882         *uniqueid = le64_to_cpu(data->fi.IndexNumber);
 883         return 0;
 884 }
 885
 886 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 887                                 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
 888 {
 889         struct cifs_fid *fid = &cfile->fid;
 890
 891         if (cfile->symlink_target) {
 892                 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 893                 if (!data->symlink_target)
 894                         return -ENOMEM;
 895         }
 896         return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
 897 }
 898
 899 #ifdef CONFIG_CIFS_XATTR
 900 static ssize_t
 901 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 902                      struct smb2_file_full_ea_info *src, size_t src_size,
 903                      const unsigned char *ea_name)
 904 {
 905         int rc = 0;
 906         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 907         char *name, *value;
 908         size_t buf_size = dst_size;
 909         size_t name_len, value_len, user_name_len;
 910
 911         while (src_size > 0) {
 912                 name_len = (size_t)src->ea_name_length;
 913                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 914
 915                 if (name_len == 0)
 916                         break;
 917
 918                 if (src_size < 8 + name_len + 1 + value_len) {
 919                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 920                         rc = -EIO;
 921                         goto out;
 922                 }
 923
 924                 name = &src->ea_data[0];
 925                 value = &src->ea_data[src->ea_name_length + 1];
 926
 927                 if (ea_name) {
 928                         if (ea_name_len == name_len &&
 929                             memcmp(ea_name, name, name_len) == 0) {
 930                                 rc = value_len;
 931                                 if (dst_size == 0)
 932                                         goto out;
 933                                 if (dst_size < value_len) {
 934                                         rc = -ERANGE;
 935                                         goto out;
 936                                 }
 937                                 memcpy(dst, value, value_len);
 938                                 goto out;
 939                         }
 940                 } else {
 941                         /* 'user.' plus a terminating null */
 942                         user_name_len = 5 + 1 + name_len;
 943
 944                         if (buf_size == 0) {
 945                                 /* skip copy - calc size only */
 946                                 rc += user_name_len;
 947                         } else if (dst_size >= user_name_len) {
 948                                 dst_size -= user_name_len;
 949                                 memcpy(dst, "user.", 5);
 950                                 dst += 5;
 951                                 memcpy(dst, src->ea_data, name_len);
 952                                 dst += name_len;
 953                                 *dst = 0;
 954                                 ++dst;
 955                                 rc += user_name_len;
 956                         } else {
 957                                 /* stop before overrun buffer */
 958                                 rc = -ERANGE;
 959                                 break;
 960                         }
 961                 }
 962
 963                 if (!src->next_entry_offset)
 964                         break;
 965
 966                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
 967                         /* stop before overrun buffer */
 968                         rc = -ERANGE;
 969                         break;
 970                 }
 971                 src_size -= le32_to_cpu(src->next_entry_offset);
 972                 src = (void *)((char *)src +
 973                                le32_to_cpu(src->next_entry_offset));
 974         }
 975
 976         /* didn't find the named attribute */
 977         if (ea_name)
 978                 rc = -ENODATA;
 979
 980 out:
 981         return (ssize_t)rc;
 982 }
 983
 984 static ssize_t
 985 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 986                const unsigned char *path, const unsigned char *ea_name,
 987                char *ea_data, size_t buf_size,
 988                struct cifs_sb_info *cifs_sb)
 989 {
 990         int rc;
 991         struct kvec rsp_iov = {NULL, 0};
 992         int buftype = CIFS_NO_BUFFER;
 993         struct smb2_query_info_rsp *rsp;
 994         struct smb2_file_full_ea_info *info = NULL;
 995
 996         rc = smb2_query_info_compound(xid, tcon, path,
 997                                       FILE_READ_EA,
 998                                       FILE_FULL_EA_INFORMATION,
 999                                       SMB2_O_INFO_FILE,
1000                                       CIFSMaxBufSize -
1001                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1002                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1003                                       &rsp_iov, &buftype, cifs_sb);
1004         if (rc) {
1005                 /*
1006                  * If ea_name is NULL (listxattr) and there are no EAs,
1007                  * return 0 as it's not an error. Otherwise, the specified
1008                  * ea_name was not found.
1009                  */
1010                 if (!ea_name && rc == -ENODATA)
1011                         rc = 0;
1012                 goto qeas_exit;
1013         }
1014
1015         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1016         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1017                                le32_to_cpu(rsp->OutputBufferLength),
1018                                &rsp_iov,
1019                                sizeof(struct smb2_file_full_ea_info));
1020         if (rc)
1021                 goto qeas_exit;
1022
1023         info = (struct smb2_file_full_ea_info *)(
1024                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1025         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1026                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1027
1028  qeas_exit:
1029         free_rsp_buf(buftype, rsp_iov.iov_base);
1030         return rc;
1031 }
1032
1033
1034 static int
1035 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1036             const char *path, const char *ea_name, const void *ea_value,
1037             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1038             struct cifs_sb_info *cifs_sb)
1039 {
1040         struct cifs_ses *ses = tcon->ses;
1041         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1042         __le16 *utf16_path = NULL;
1043         int ea_name_len = strlen(ea_name);
1044         int flags = CIFS_CP_CREATE_CLOSE_OP;
1045         int len;
1046         struct smb_rqst rqst[3];
1047         int resp_buftype[3];
1048         struct kvec rsp_iov[3];
1049         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1050         struct cifs_open_parms oparms;
1051         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1052         struct cifs_fid fid;
1053         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1054         unsigned int size[1];
1055         void *data[1];
1056         struct smb2_file_full_ea_info *ea = NULL;
1057         struct kvec close_iov[1];
1058         struct smb2_query_info_rsp *rsp;
1059         int rc, used_len = 0;
1060
1061         if (smb3_encryption_required(tcon))
1062                 flags |= CIFS_TRANSFORM_REQ;
1063
1064         if (ea_name_len > 255)
1065                 return -EINVAL;
1066
1067         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1068         if (!utf16_path)
1069                 return -ENOMEM;
1070
1071         memset(rqst, 0, sizeof(rqst));
1072         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1073         memset(rsp_iov, 0, sizeof(rsp_iov));
1074
1075         if (ses->server->ops->query_all_EAs) {
1076                 if (!ea_value) {
1077                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1078                                                              ea_name, NULL, 0,
1079                                                              cifs_sb);
1080                         if (rc == -ENODATA)
1081                                 goto sea_exit;
1082                 } else {
1083                         /* If we are adding a attribute we should first check
1084                          * if there will be enough space available to store
1085                          * the new EA. If not we should not add it since we
1086                          * would not be able to even read the EAs back.
1087                          */
1088                         rc = smb2_query_info_compound(xid, tcon, path,
1089                                       FILE_READ_EA,
1090                                       FILE_FULL_EA_INFORMATION,
1091                                       SMB2_O_INFO_FILE,
1092                                       CIFSMaxBufSize -
1093                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1094                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1095                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1096                         if (rc == 0) {
1097                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1098                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1099                         }
1100                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1101                         resp_buftype[1] = CIFS_NO_BUFFER;
1102                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1103                         rc = 0;
1104
1105                         /* Use a fudge factor of 256 bytes in case we collide
1106                          * with a different set_EAs command.
1107                          */
1108                         if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1109                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1110                            used_len + ea_name_len + ea_value_len + 1) {
1111                                 rc = -ENOSPC;
1112                                 goto sea_exit;
1113                         }
1114                 }
1115         }
1116
1117         /* Open */
1118         memset(&open_iov, 0, sizeof(open_iov));
1119         rqst[0].rq_iov = open_iov;
1120         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1121
1122         oparms = (struct cifs_open_parms) {
1123                 .tcon = tcon,
1124                 .path = path,
1125                 .desired_access = FILE_WRITE_EA,
1126                 .disposition = FILE_OPEN,
1127                 .create_options = cifs_create_options(cifs_sb, 0),
1128                 .fid = &fid,
1129         };
1130
1131         rc = SMB2_open_init(tcon, server,
1132                             &rqst[0], &oplock, &oparms, utf16_path);
1133         if (rc)
1134                 goto sea_exit;
1135         smb2_set_next_command(tcon, &rqst[0]);
1136
1137
1138         /* Set Info */
1139         memset(&si_iov, 0, sizeof(si_iov));
1140         rqst[1].rq_iov = si_iov;
1141         rqst[1].rq_nvec = 1;
1142
1143         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1144         ea = kzalloc(len, GFP_KERNEL);
1145         if (ea == NULL) {
1146                 rc = -ENOMEM;
1147                 goto sea_exit;
1148         }
1149
1150         ea->ea_name_length = ea_name_len;
1151         ea->ea_value_length = cpu_to_le16(ea_value_len);
1152         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1153         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1154
1155         size[0] = len;
1156         data[0] = ea;
1157
1158         rc = SMB2_set_info_init(tcon, server,
1159                                 &rqst[1], COMPOUND_FID,
1160                                 COMPOUND_FID, current->tgid,
1161                                 FILE_FULL_EA_INFORMATION,
1162                                 SMB2_O_INFO_FILE, 0, data, size);
1163         if (rc)
1164                 goto sea_exit;
1165         smb2_set_next_command(tcon, &rqst[1]);
1166         smb2_set_related(&rqst[1]);
1167
1168
1169         /* Close */
1170         memset(&close_iov, 0, sizeof(close_iov));
1171         rqst[2].rq_iov = close_iov;
1172         rqst[2].rq_nvec = 1;
1173         rc = SMB2_close_init(tcon, server,
1174                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1175         if (rc)
1176                 goto sea_exit;
1177         smb2_set_related(&rqst[2]);
1178
1179         rc = compound_send_recv(xid, ses, server,
1180                                 flags, 3, rqst,
1181                                 resp_buftype, rsp_iov);
1182         /* no need to bump num_remote_opens because handle immediately closed */
1183
1184  sea_exit:
1185         kfree(ea);
1186         kfree(utf16_path);
1187         SMB2_open_free(&rqst[0]);
1188         SMB2_set_info_free(&rqst[1]);
1189         SMB2_close_free(&rqst[2]);
1190         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1191         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1192         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1193         return rc;
1194 }
1195 #endif
1196
1197 static bool
1198 smb2_can_echo(struct TCP_Server_Info *server)
1199 {
1200         return server->echoes;
1201 }
1202
1203 static void
1204 smb2_clear_stats(struct cifs_tcon *tcon)
1205 {
1206         int i;
1207
1208         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1209                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1210                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1211         }
1212 }
1213
1214 static void
1215 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1216 {
1217         seq_puts(m, "\n\tShare Capabilities:");
1218         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1219                 seq_puts(m, " DFS,");
1220         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1221                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1222         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1223                 seq_puts(m, " SCALEOUT,");
1224         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1225                 seq_puts(m, " CLUSTER,");
1226         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1227                 seq_puts(m, " ASYMMETRIC,");
1228         if (tcon->capabilities == 0)
1229                 seq_puts(m, " None");
1230         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1231                 seq_puts(m, " Aligned,");
1232         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1233                 seq_puts(m, " Partition Aligned,");
1234         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1235                 seq_puts(m, " SSD,");
1236         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1237                 seq_puts(m, " TRIM-support,");
1238
1239         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1240         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1241         if (tcon->perf_sector_size)
1242                 seq_printf(m, "\tOptimal sector size: 0x%x",
1243                            tcon->perf_sector_size);
1244         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1245 }
1246
1247 static void
1248 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1249 {
1250         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1251         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1252
1253         /*
1254          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1255          *  totals (requests sent) since those SMBs are per-session not per tcon
1256          */
1257         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1258                    (long long)(tcon->bytes_read),
1259                    (long long)(tcon->bytes_written));
1260         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1261                    atomic_read(&tcon->num_local_opens),
1262                    atomic_read(&tcon->num_remote_opens));
1263         seq_printf(m, "\nTreeConnects: %d total %d failed",
1264                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1265                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1266         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1267                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1268                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1269         seq_printf(m, "\nCreates: %d total %d failed",
1270                    atomic_read(&sent[SMB2_CREATE_HE]),
1271                    atomic_read(&failed[SMB2_CREATE_HE]));
1272         seq_printf(m, "\nCloses: %d total %d failed",
1273                    atomic_read(&sent[SMB2_CLOSE_HE]),
1274                    atomic_read(&failed[SMB2_CLOSE_HE]));
1275         seq_printf(m, "\nFlushes: %d total %d failed",
1276                    atomic_read(&sent[SMB2_FLUSH_HE]),
1277                    atomic_read(&failed[SMB2_FLUSH_HE]));
1278         seq_printf(m, "\nReads: %d total %d failed",
1279                    atomic_read(&sent[SMB2_READ_HE]),
1280                    atomic_read(&failed[SMB2_READ_HE]));
1281         seq_printf(m, "\nWrites: %d total %d failed",
1282                    atomic_read(&sent[SMB2_WRITE_HE]),
1283                    atomic_read(&failed[SMB2_WRITE_HE]));
1284         seq_printf(m, "\nLocks: %d total %d failed",
1285                    atomic_read(&sent[SMB2_LOCK_HE]),
1286                    atomic_read(&failed[SMB2_LOCK_HE]));
1287         seq_printf(m, "\nIOCTLs: %d total %d failed",
1288                    atomic_read(&sent[SMB2_IOCTL_HE]),
1289                    atomic_read(&failed[SMB2_IOCTL_HE]));
1290         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1291                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1292                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1293         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1294                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1295                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1296         seq_printf(m, "\nQueryInfos: %d total %d failed",
1297                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1298                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1299         seq_printf(m, "\nSetInfos: %d total %d failed",
1300                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1301                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1302         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1303                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1304                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1305 }
1306
1307 static void
1308 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1309 {
1310         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1311         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1312
1313         cfile->fid.persistent_fid = fid->persistent_fid;
1314         cfile->fid.volatile_fid = fid->volatile_fid;
1315         cfile->fid.access = fid->access;
1316 #ifdef CONFIG_CIFS_DEBUG2
1317         cfile->fid.mid = fid->mid;
1318 #endif /* CIFS_DEBUG2 */
1319         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1320                                       &fid->purge_cache);
1321         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1322         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1323 }
1324
1325 static void
1326 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1327                 struct cifs_fid *fid)
1328 {
1329         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1330 }
1331
1332 static void
1333 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1334                    struct cifsFileInfo *cfile)
1335 {
1336         struct smb2_file_network_open_info file_inf;
1337         struct inode *inode;
1338         int rc;
1339
1340         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1341                    cfile->fid.volatile_fid, &file_inf);
1342         if (rc)
1343                 return;
1344
1345         inode = d_inode(cfile->dentry);
1346
1347         spin_lock(&inode->i_lock);
1348         CIFS_I(inode)->time = jiffies;
1349
1350         /* Creation time should not need to be updated on close */
1351         if (file_inf.LastWriteTime)
1352                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1353         if (file_inf.ChangeTime)
1354                 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1355         if (file_inf.LastAccessTime)
1356                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1357
1358         /*
1359          * i_blocks is not related to (i_size / i_blksize),
1360          * but instead 512 byte (2**9) size is required for
1361          * calculating num blocks.
1362          */
1363         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1364                 inode->i_blocks =
1365                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1366
1367         /* End of file and Attributes should not have to be updated on close */
1368         spin_unlock(&inode->i_lock);
1369 }
1370
1371 static int
1372 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1373                      u64 persistent_fid, u64 volatile_fid,
1374                      struct copychunk_ioctl *pcchunk)
1375 {
1376         int rc;
1377         unsigned int ret_data_len;
1378         struct resume_key_req *res_key;
1379
1380         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1381                         FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1382                         CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1383
1384         if (rc == -EOPNOTSUPP) {
1385                 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1386                 goto req_res_key_exit;
1387         } else if (rc) {
1388                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1389                 goto req_res_key_exit;
1390         }
1391         if (ret_data_len < sizeof(struct resume_key_req)) {
1392                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1393                 rc = -EINVAL;
1394                 goto req_res_key_exit;
1395         }
1396         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1397
1398 req_res_key_exit:
1399         kfree(res_key);
1400         return rc;
1401 }
1402
1403 struct iqi_vars {
1404         struct smb_rqst rqst[3];
1405         struct kvec rsp_iov[3];
1406         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1407         struct kvec qi_iov[1];
1408         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1409         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1410         struct kvec close_iov[1];
1411 };
1412
1413 static int
1414 smb2_ioctl_query_info(const unsigned int xid,
1415                       struct cifs_tcon *tcon,
1416                       struct cifs_sb_info *cifs_sb,
1417                       __le16 *path, int is_dir,
1418                       unsigned long p)
1419 {
1420         struct iqi_vars *vars;
1421         struct smb_rqst *rqst;
1422         struct kvec *rsp_iov;
1423         struct cifs_ses *ses = tcon->ses;
1424         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1425         char __user *arg = (char __user *)p;
1426         struct smb_query_info qi;
1427         struct smb_query_info __user *pqi;
1428         int rc = 0;
1429         int flags = CIFS_CP_CREATE_CLOSE_OP;
1430         struct smb2_query_info_rsp *qi_rsp = NULL;
1431         struct smb2_ioctl_rsp *io_rsp = NULL;
1432         void *buffer = NULL;
1433         int resp_buftype[3];
1434         struct cifs_open_parms oparms;
1435         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1436         struct cifs_fid fid;
1437         unsigned int size[2];
1438         void *data[2];
1439         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1440         void (*free_req1_func)(struct smb_rqst *r);
1441
1442         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1443         if (vars == NULL)
1444                 return -ENOMEM;
1445         rqst = &vars->rqst[0];
1446         rsp_iov = &vars->rsp_iov[0];
1447
1448         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1449
1450         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1451                 rc = -EFAULT;
1452                 goto free_vars;
1453         }
1454         if (qi.output_buffer_length > 1024) {
1455                 rc = -EINVAL;
1456                 goto free_vars;
1457         }
1458
1459         if (!ses || !server) {
1460                 rc = -EIO;
1461                 goto free_vars;
1462         }
1463
1464         if (smb3_encryption_required(tcon))
1465                 flags |= CIFS_TRANSFORM_REQ;
1466
1467         if (qi.output_buffer_length) {
1468                 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1469                 if (IS_ERR(buffer)) {
1470                         rc = PTR_ERR(buffer);
1471                         goto free_vars;
1472                 }
1473         }
1474
1475         /* Open */
1476         rqst[0].rq_iov = &vars->open_iov[0];
1477         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1478
1479         oparms = (struct cifs_open_parms) {
1480                 .tcon = tcon,
1481                 .disposition = FILE_OPEN,
1482                 .create_options = cifs_create_options(cifs_sb, create_options),
1483                 .fid = &fid,
1484         };
1485
1486         if (qi.flags & PASSTHRU_FSCTL) {
1487                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1488                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1489                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1490                         break;
1491                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1492                         oparms.desired_access = GENERIC_ALL;
1493                         break;
1494                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1495                         oparms.desired_access = GENERIC_READ;
1496                         break;
1497                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1498                         oparms.desired_access = GENERIC_WRITE;
1499                         break;
1500                 }
1501         } else if (qi.flags & PASSTHRU_SET_INFO) {
1502                 oparms.desired_access = GENERIC_WRITE;
1503         } else {
1504                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1505         }
1506
1507         rc = SMB2_open_init(tcon, server,
1508                             &rqst[0], &oplock, &oparms, path);
1509         if (rc)
1510                 goto free_output_buffer;
1511         smb2_set_next_command(tcon, &rqst[0]);
1512
1513         /* Query */
1514         if (qi.flags & PASSTHRU_FSCTL) {
1515                 /* Can eventually relax perm check since server enforces too */
1516                 if (!capable(CAP_SYS_ADMIN)) {
1517                         rc = -EPERM;
1518                         goto free_open_req;
1519                 }
1520                 rqst[1].rq_iov = &vars->io_iov[0];
1521                 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1522
1523                 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1524                                      qi.info_type, buffer, qi.output_buffer_length,
1525                                      CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1526                                      MAX_SMB2_CLOSE_RESPONSE_SIZE);
1527                 free_req1_func = SMB2_ioctl_free;
1528         } else if (qi.flags == PASSTHRU_SET_INFO) {
1529                 /* Can eventually relax perm check since server enforces too */
1530                 if (!capable(CAP_SYS_ADMIN)) {
1531                         rc = -EPERM;
1532                         goto free_open_req;
1533                 }
1534                 if (qi.output_buffer_length < 8) {
1535                         rc = -EINVAL;
1536                         goto free_open_req;
1537                 }
1538                 rqst[1].rq_iov = &vars->si_iov[0];
1539                 rqst[1].rq_nvec = 1;
1540
1541                 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1542                 size[0] = 8;
1543                 data[0] = buffer;
1544
1545                 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1546                                         current->tgid, FILE_END_OF_FILE_INFORMATION,
1547                                         SMB2_O_INFO_FILE, 0, data, size);
1548                 free_req1_func = SMB2_set_info_free;
1549         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1550                 rqst[1].rq_iov = &vars->qi_iov[0];
1551                 rqst[1].rq_nvec = 1;
1552
1553                 rc = SMB2_query_info_init(tcon, server,
1554                                   &rqst[1], COMPOUND_FID,
1555                                   COMPOUND_FID, qi.file_info_class,
1556                                   qi.info_type, qi.additional_information,
1557                                   qi.input_buffer_length,
1558                                   qi.output_buffer_length, buffer);
1559                 free_req1_func = SMB2_query_info_free;
1560         } else { /* unknown flags */
1561                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1562                               qi.flags);
1563                 rc = -EINVAL;
1564         }
1565
1566         if (rc)
1567                 goto free_open_req;
1568         smb2_set_next_command(tcon, &rqst[1]);
1569         smb2_set_related(&rqst[1]);
1570
1571         /* Close */
1572         rqst[2].rq_iov = &vars->close_iov[0];
1573         rqst[2].rq_nvec = 1;
1574
1575         rc = SMB2_close_init(tcon, server,
1576                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1577         if (rc)
1578                 goto free_req_1;
1579         smb2_set_related(&rqst[2]);
1580
1581         rc = compound_send_recv(xid, ses, server,
1582                                 flags, 3, rqst,
1583                                 resp_buftype, rsp_iov);
1584         if (rc)
1585                 goto out;
1586
1587         /* No need to bump num_remote_opens since handle immediately closed */
1588         if (qi.flags & PASSTHRU_FSCTL) {
1589                 pqi = (struct smb_query_info __user *)arg;
1590                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1591                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1592                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1593                 if (qi.input_buffer_length > 0 &&
1594                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1595                     > rsp_iov[1].iov_len) {
1596                         rc = -EFAULT;
1597                         goto out;
1598                 }
1599
1600                 if (copy_to_user(&pqi->input_buffer_length,
1601                                  &qi.input_buffer_length,
1602                                  sizeof(qi.input_buffer_length))) {
1603                         rc = -EFAULT;
1604                         goto out;
1605                 }
1606
1607                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1608                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1609                                  qi.input_buffer_length))
1610                         rc = -EFAULT;
1611         } else {
1612                 pqi = (struct smb_query_info __user *)arg;
1613                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1614                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1615                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1616                 if (copy_to_user(&pqi->input_buffer_length,
1617                                  &qi.input_buffer_length,
1618                                  sizeof(qi.input_buffer_length))) {
1619                         rc = -EFAULT;
1620                         goto out;
1621                 }
1622
1623                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1624                                  qi.input_buffer_length))
1625                         rc = -EFAULT;
1626         }
1627
1628 out:
1629         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1630         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1631         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1632         SMB2_close_free(&rqst[2]);
1633 free_req_1:
1634         free_req1_func(&rqst[1]);
1635 free_open_req:
1636         SMB2_open_free(&rqst[0]);
1637 free_output_buffer:
1638         kfree(buffer);
1639 free_vars:
1640         kfree(vars);
1641         return rc;
1642 }
1643
1644 static ssize_t
1645 smb2_copychunk_range(const unsigned int xid,
1646                         struct cifsFileInfo *srcfile,
1647                         struct cifsFileInfo *trgtfile, u64 src_off,
1648                         u64 len, u64 dest_off)
1649 {
1650         int rc;
1651         unsigned int ret_data_len;
1652         struct copychunk_ioctl *pcchunk;
1653         struct copychunk_ioctl_rsp *retbuf = NULL;
1654         struct cifs_tcon *tcon;
1655         int chunks_copied = 0;
1656         bool chunk_sizes_updated = false;
1657         ssize_t bytes_written, total_bytes_written = 0;
1658
1659         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1660         if (pcchunk == NULL)
1661                 return -ENOMEM;
1662
1663         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1664         /* Request a key from the server to identify the source of the copy */
1665         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1666                                 srcfile->fid.persistent_fid,
1667                                 srcfile->fid.volatile_fid, pcchunk);
1668
1669         /* Note: request_res_key sets res_key null only if rc !=0 */
1670         if (rc)
1671                 goto cchunk_out;
1672
1673         /* For now array only one chunk long, will make more flexible later */
1674         pcchunk->ChunkCount = cpu_to_le32(1);
1675         pcchunk->Reserved = 0;
1676         pcchunk->Reserved2 = 0;
1677
1678         tcon = tlink_tcon(trgtfile->tlink);
1679
1680         while (len > 0) {
1681                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1682                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1683                 pcchunk->Length =
1684                         cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1685
1686                 /* Request server copy to target from src identified by key */
1687                 kfree(retbuf);
1688                 retbuf = NULL;
1689                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1690                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1691                         (char *)pcchunk, sizeof(struct copychunk_ioctl),
1692                         CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1693                 if (rc == 0) {
1694                         if (ret_data_len !=
1695                                         sizeof(struct copychunk_ioctl_rsp)) {
1696                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1697                                 rc = -EIO;
1698                                 goto cchunk_out;
1699                         }
1700                         if (retbuf->TotalBytesWritten == 0) {
1701                                 cifs_dbg(FYI, "no bytes copied\n");
1702                                 rc = -EIO;
1703                                 goto cchunk_out;
1704                         }
1705                         /*
1706                          * Check if server claimed to write more than we asked
1707                          */
1708                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1709                             le32_to_cpu(pcchunk->Length)) {
1710                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1711                                 rc = -EIO;
1712                                 goto cchunk_out;
1713                         }
1714                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1715                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1716                                 rc = -EIO;
1717                                 goto cchunk_out;
1718                         }
1719                         chunks_copied++;
1720
1721                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1722                         src_off += bytes_written;
1723                         dest_off += bytes_written;
1724                         len -= bytes_written;
1725                         total_bytes_written += bytes_written;
1726
1727                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1728                                 le32_to_cpu(retbuf->ChunksWritten),
1729                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1730                                 bytes_written);
1731                 } else if (rc == -EINVAL) {
1732                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1733                                 goto cchunk_out;
1734
1735                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1736                                 le32_to_cpu(retbuf->ChunksWritten),
1737                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1738                                 le32_to_cpu(retbuf->TotalBytesWritten));
1739
1740                         /*
1741                          * Check if this is the first request using these sizes,
1742                          * (ie check if copy succeed once with original sizes
1743                          * and check if the server gave us different sizes after
1744                          * we already updated max sizes on previous request).
1745                          * if not then why is the server returning an error now
1746                          */
1747                         if ((chunks_copied != 0) || chunk_sizes_updated)
1748                                 goto cchunk_out;
1749
1750                         /* Check that server is not asking us to grow size */
1751                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1752                                         tcon->max_bytes_chunk)
1753                                 tcon->max_bytes_chunk =
1754                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1755                         else
1756                                 goto cchunk_out; /* server gave us bogus size */
1757
1758                         /* No need to change MaxChunks since already set to 1 */
1759                         chunk_sizes_updated = true;
1760                 } else
1761                         goto cchunk_out;
1762         }
1763
1764 cchunk_out:
1765         kfree(pcchunk);
1766         kfree(retbuf);
1767         if (rc)
1768                 return rc;
1769         else
1770                 return total_bytes_written;
1771 }
1772
1773 static int
1774 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1775                 struct cifs_fid *fid)
1776 {
1777         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1778 }
1779
1780 static unsigned int
1781 smb2_read_data_offset(char *buf)
1782 {
1783         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1784
1785         return rsp->DataOffset;
1786 }
1787
1788 static unsigned int
1789 smb2_read_data_length(char *buf, bool in_remaining)
1790 {
1791         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1792
1793         if (in_remaining)
1794                 return le32_to_cpu(rsp->DataRemaining);
1795
1796         return le32_to_cpu(rsp->DataLength);
1797 }
1798
1799
1800 static int
1801 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1802                struct cifs_io_parms *parms, unsigned int *bytes_read,
1803                char **buf, int *buf_type)
1804 {
1805         parms->persistent_fid = pfid->persistent_fid;
1806         parms->volatile_fid = pfid->volatile_fid;
1807         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1808 }
1809
1810 static int
1811 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1812                 struct cifs_io_parms *parms, unsigned int *written,
1813                 struct kvec *iov, unsigned long nr_segs)
1814 {
1815
1816         parms->persistent_fid = pfid->persistent_fid;
1817         parms->volatile_fid = pfid->volatile_fid;
1818         return SMB2_write(xid, parms, written, iov, nr_segs);
1819 }
1820
1821 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1822 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1823                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1824 {
1825         struct cifsInodeInfo *cifsi;
1826         int rc;
1827
1828         cifsi = CIFS_I(inode);
1829
1830         /* if file already sparse don't bother setting sparse again */
1831         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1832                 return true; /* already sparse */
1833
1834         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1835                 return true; /* already not sparse */
1836
1837         /*
1838          * Can't check for sparse support on share the usual way via the
1839          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1840          * since Samba server doesn't set the flag on the share, yet
1841          * supports the set sparse FSCTL and returns sparse correctly
1842          * in the file attributes. If we fail setting sparse though we
1843          * mark that server does not support sparse files for this share
1844          * to avoid repeatedly sending the unsupported fsctl to server
1845          * if the file is repeatedly extended.
1846          */
1847         if (tcon->broken_sparse_sup)
1848                 return false;
1849
1850         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1851                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1852                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1853         if (rc) {
1854                 tcon->broken_sparse_sup = true;
1855                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1856                 return false;
1857         }
1858
1859         if (setsparse)
1860                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1861         else
1862                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1863
1864         return true;
1865 }
1866
1867 static int
1868 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1869                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1870 {
1871         __le64 eof = cpu_to_le64(size);
1872         struct inode *inode;
1873
1874         /*
1875          * If extending file more than one page make sparse. Many Linux fs
1876          * make files sparse by default when extending via ftruncate
1877          */
1878         inode = d_inode(cfile->dentry);
1879
1880         if (!set_alloc && (size > inode->i_size + 8192)) {
1881                 __u8 set_sparse = 1;
1882
1883                 /* whether set sparse succeeds or not, extend the file */
1884                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1885         }
1886
1887         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1888                             cfile->fid.volatile_fid, cfile->pid, &eof);
1889 }
1890
1891 static int
1892 smb2_duplicate_extents(const unsigned int xid,
1893                         struct cifsFileInfo *srcfile,
1894                         struct cifsFileInfo *trgtfile, u64 src_off,
1895                         u64 len, u64 dest_off)
1896 {
1897         int rc;
1898         unsigned int ret_data_len;
1899         struct inode *inode;
1900         struct duplicate_extents_to_file dup_ext_buf;
1901         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1902
1903         /* server fileays advertise duplicate extent support with this flag */
1904         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1905              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1906                 return -EOPNOTSUPP;
1907
1908         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1909         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1910         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1911         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1912         dup_ext_buf.ByteCount = cpu_to_le64(len);
1913         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1914                 src_off, dest_off, len);
1915
1916         inode = d_inode(trgtfile->dentry);
1917         if (inode->i_size < dest_off + len) {
1918                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1919                 if (rc)
1920                         goto duplicate_extents_out;
1921
1922                 /*
1923                  * Although also could set plausible allocation size (i_blocks)
1924                  * here in addition to setting the file size, in reflink
1925                  * it is likely that the target file is sparse. Its allocation
1926                  * size will be queried on next revalidate, but it is important
1927                  * to make sure that file's cached size is updated immediately
1928                  */
1929                 cifs_setsize(inode, dest_off + len);
1930         }
1931         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1932                         trgtfile->fid.volatile_fid,
1933                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1934                         (char *)&dup_ext_buf,
1935                         sizeof(struct duplicate_extents_to_file),
1936                         CIFSMaxBufSize, NULL,
1937                         &ret_data_len);
1938
1939         if (ret_data_len > 0)
1940                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1941
1942 duplicate_extents_out:
1943         return rc;
1944 }
1945
1946 static int
1947 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1948                    struct cifsFileInfo *cfile)
1949 {
1950         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1951                             cfile->fid.volatile_fid);
1952 }
1953
1954 static int
1955 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1956                    struct cifsFileInfo *cfile)
1957 {
1958         struct fsctl_set_integrity_information_req integr_info;
1959         unsigned int ret_data_len;
1960
1961         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1962         integr_info.Flags = 0;
1963         integr_info.Reserved = 0;
1964
1965         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1966                         cfile->fid.volatile_fid,
1967                         FSCTL_SET_INTEGRITY_INFORMATION,
1968                         (char *)&integr_info,
1969                         sizeof(struct fsctl_set_integrity_information_req),
1970                         CIFSMaxBufSize, NULL,
1971                         &ret_data_len);
1972
1973 }
1974
1975 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1976 #define GMT_TOKEN_SIZE 50
1977
1978 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1979
1980 /*
1981  * Input buffer contains (empty) struct smb_snapshot array with size filled in
1982  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1983  */
1984 static int
1985 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1986                    struct cifsFileInfo *cfile, void __user *ioc_buf)
1987 {
1988         char *retbuf = NULL;
1989         unsigned int ret_data_len = 0;
1990         int rc;
1991         u32 max_response_size;
1992         struct smb_snapshot_array snapshot_in;
1993
1994         /*
1995          * On the first query to enumerate the list of snapshots available
1996          * for this volume the buffer begins with 0 (number of snapshots
1997          * which can be returned is zero since at that point we do not know
1998          * how big the buffer needs to be). On the second query,
1999          * it (ret_data_len) is set to number of snapshots so we can
2000          * know to set the maximum response size larger (see below).
2001          */
2002         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2003                 return -EFAULT;
2004
2005         /*
2006          * Note that for snapshot queries that servers like Azure expect that
2007          * the first query be minimal size (and just used to get the number/size
2008          * of previous versions) so response size must be specified as EXACTLY
2009          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2010          * of eight bytes.
2011          */
2012         if (ret_data_len == 0)
2013                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2014         else
2015                 max_response_size = CIFSMaxBufSize;
2016
2017         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2018                         cfile->fid.volatile_fid,
2019                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2020                         NULL, 0 /* no input data */, max_response_size,
2021                         (char **)&retbuf,
2022                         &ret_data_len);
2023         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2024                         rc, ret_data_len);
2025         if (rc)
2026                 return rc;
2027
2028         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2029                 /* Fixup buffer */
2030                 if (copy_from_user(&snapshot_in, ioc_buf,
2031                     sizeof(struct smb_snapshot_array))) {
2032                         rc = -EFAULT;
2033                         kfree(retbuf);
2034                         return rc;
2035                 }
2036
2037                 /*
2038                  * Check for min size, ie not large enough to fit even one GMT
2039                  * token (snapshot).  On the first ioctl some users may pass in
2040                  * smaller size (or zero) to simply get the size of the array
2041                  * so the user space caller can allocate sufficient memory
2042                  * and retry the ioctl again with larger array size sufficient
2043                  * to hold all of the snapshot GMT tokens on the second try.
2044                  */
2045                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2046                         ret_data_len = sizeof(struct smb_snapshot_array);
2047
2048                 /*
2049                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2050                  * the snapshot array (of 50 byte GMT tokens) each
2051                  * representing an available previous version of the data
2052                  */
2053                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2054                                         sizeof(struct smb_snapshot_array)))
2055                         ret_data_len = snapshot_in.snapshot_array_size +
2056                                         sizeof(struct smb_snapshot_array);
2057
2058                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2059                         rc = -EFAULT;
2060         }
2061
2062         kfree(retbuf);
2063         return rc;
2064 }
2065
2066
2067
2068 static int
2069 smb3_notify(const unsigned int xid, struct file *pfile,
2070             void __user *ioc_buf, bool return_changes)
2071 {
2072         struct smb3_notify_info notify;
2073         struct smb3_notify_info __user *pnotify_buf;
2074         struct dentry *dentry = pfile->f_path.dentry;
2075         struct inode *inode = file_inode(pfile);
2076         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2077         struct cifs_open_parms oparms;
2078         struct cifs_fid fid;
2079         struct cifs_tcon *tcon;
2080         const unsigned char *path;
2081         char *returned_ioctl_info = NULL;
2082         void *page = alloc_dentry_path();
2083         __le16 *utf16_path = NULL;
2084         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2085         int rc = 0;
2086         __u32 ret_len = 0;
2087
2088         path = build_path_from_dentry(dentry, page);
2089         if (IS_ERR(path)) {
2090                 rc = PTR_ERR(path);
2091                 goto notify_exit;
2092         }
2093
2094         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2095         if (utf16_path == NULL) {
2096                 rc = -ENOMEM;
2097                 goto notify_exit;
2098         }
2099
2100         if (return_changes) {
2101                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2102                         rc = -EFAULT;
2103                         goto notify_exit;
2104                 }
2105         } else {
2106                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2107                         rc = -EFAULT;
2108                         goto notify_exit;
2109                 }
2110                 notify.data_len = 0;
2111         }
2112
2113         tcon = cifs_sb_master_tcon(cifs_sb);
2114         oparms = (struct cifs_open_parms) {
2115                 .tcon = tcon,
2116                 .path = path,
2117                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2118                 .disposition = FILE_OPEN,
2119                 .create_options = cifs_create_options(cifs_sb, 0),
2120                 .fid = &fid,
2121         };
2122
2123         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2124                        NULL);
2125         if (rc)
2126                 goto notify_exit;
2127
2128         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2129                                 notify.watch_tree, notify.completion_filter,
2130                                 notify.data_len, &returned_ioctl_info, &ret_len);
2131
2132         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2133
2134         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2135         if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2136                 if (ret_len > notify.data_len)
2137                         ret_len = notify.data_len;
2138                 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2139                 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2140                         rc = -EFAULT;
2141                 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2142                         rc = -EFAULT;
2143         }
2144         kfree(returned_ioctl_info);
2145 notify_exit:
2146         free_dentry_path(page);
2147         kfree(utf16_path);
2148         return rc;
2149 }
2150
2151 static int
2152 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2153                      const char *path, struct cifs_sb_info *cifs_sb,
2154                      struct cifs_fid *fid, __u16 search_flags,
2155                      struct cifs_search_info *srch_inf)
2156 {
2157         __le16 *utf16_path;
2158         struct smb_rqst rqst[2];
2159         struct kvec rsp_iov[2];
2160         int resp_buftype[2];
2161         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2162         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2163         int rc, flags = 0;
2164         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2165         struct cifs_open_parms oparms;
2166         struct smb2_query_directory_rsp *qd_rsp = NULL;
2167         struct smb2_create_rsp *op_rsp = NULL;
2168         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2169         int retry_count = 0;
2170
2171         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2172         if (!utf16_path)
2173                 return -ENOMEM;
2174
2175         if (smb3_encryption_required(tcon))
2176                 flags |= CIFS_TRANSFORM_REQ;
2177
2178         memset(rqst, 0, sizeof(rqst));
2179         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2180         memset(rsp_iov, 0, sizeof(rsp_iov));
2181
2182         /* Open */
2183         memset(&open_iov, 0, sizeof(open_iov));
2184         rqst[0].rq_iov = open_iov;
2185         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2186
2187         oparms = (struct cifs_open_parms) {
2188                 .tcon = tcon,
2189                 .path = path,
2190                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2191                 .disposition = FILE_OPEN,
2192                 .create_options = cifs_create_options(cifs_sb, 0),
2193                 .fid = fid,
2194         };
2195
2196         rc = SMB2_open_init(tcon, server,
2197                             &rqst[0], &oplock, &oparms, utf16_path);
2198         if (rc)
2199                 goto qdf_free;
2200         smb2_set_next_command(tcon, &rqst[0]);
2201
2202         /* Query directory */
2203         srch_inf->entries_in_buffer = 0;
2204         srch_inf->index_of_last_entry = 2;
2205
2206         memset(&qd_iov, 0, sizeof(qd_iov));
2207         rqst[1].rq_iov = qd_iov;
2208         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2209
2210         rc = SMB2_query_directory_init(xid, tcon, server,
2211                                        &rqst[1],
2212                                        COMPOUND_FID, COMPOUND_FID,
2213                                        0, srch_inf->info_level);
2214         if (rc)
2215                 goto qdf_free;
2216
2217         smb2_set_related(&rqst[1]);
2218
2219 again:
2220         rc = compound_send_recv(xid, tcon->ses, server,
2221                                 flags, 2, rqst,
2222                                 resp_buftype, rsp_iov);
2223
2224         if (rc == -EAGAIN && retry_count++ < 10)
2225                 goto again;
2226
2227         /* If the open failed there is nothing to do */
2228         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2229         if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2230                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2231                 goto qdf_free;
2232         }
2233         fid->persistent_fid = op_rsp->PersistentFileId;
2234         fid->volatile_fid = op_rsp->VolatileFileId;
2235
2236         /* Anything else than ENODATA means a genuine error */
2237         if (rc && rc != -ENODATA) {
2238                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2239                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2240                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2241                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2242                 goto qdf_free;
2243         }
2244
2245         atomic_inc(&tcon->num_remote_opens);
2246
2247         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2248         if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2249                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2250                                           tcon->tid, tcon->ses->Suid, 0, 0);
2251                 srch_inf->endOfSearch = true;
2252                 rc = 0;
2253                 goto qdf_free;
2254         }
2255
2256         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2257                                         srch_inf);
2258         if (rc) {
2259                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2260                         tcon->ses->Suid, 0, 0, rc);
2261                 goto qdf_free;
2262         }
2263         resp_buftype[1] = CIFS_NO_BUFFER;
2264
2265         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2266                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2267
2268  qdf_free:
2269         kfree(utf16_path);
2270         SMB2_open_free(&rqst[0]);
2271         SMB2_query_directory_free(&rqst[1]);
2272         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2273         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2274         return rc;
2275 }
2276
2277 static int
2278 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2279                     struct cifs_fid *fid, __u16 search_flags,
2280                     struct cifs_search_info *srch_inf)
2281 {
2282         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2283                                     fid->volatile_fid, 0, srch_inf);
2284 }
2285
2286 static int
2287 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2288                struct cifs_fid *fid)
2289 {
2290         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2291 }
2292
2293 /*
2294  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2295  * the number of credits and return true. Otherwise - return false.
2296  */
2297 static bool
2298 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2299 {
2300         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2301         int scredits, in_flight;
2302
2303         if (shdr->Status != STATUS_PENDING)
2304                 return false;
2305
2306         if (shdr->CreditRequest) {
2307                 spin_lock(&server->req_lock);
2308                 server->credits += le16_to_cpu(shdr->CreditRequest);
2309                 scredits = server->credits;
2310                 in_flight = server->in_flight;
2311                 spin_unlock(&server->req_lock);
2312                 wake_up(&server->request_q);
2313
2314                 trace_smb3_pend_credits(server->CurrentMid,
2315                                 server->conn_id, server->hostname, scredits,
2316                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2317                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2318                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2319         }
2320
2321         return true;
2322 }
2323
2324 static bool
2325 smb2_is_session_expired(char *buf)
2326 {
2327         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2328
2329         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2330             shdr->Status != STATUS_USER_SESSION_DELETED)
2331                 return false;
2332
2333         trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2334                                le64_to_cpu(shdr->SessionId),
2335                                le16_to_cpu(shdr->Command),
2336                                le64_to_cpu(shdr->MessageId));
2337         cifs_dbg(FYI, "Session expired or deleted\n");
2338
2339         return true;
2340 }
2341
2342 static bool
2343 smb2_is_status_io_timeout(char *buf)
2344 {
2345         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2346
2347         if (shdr->Status == STATUS_IO_TIMEOUT)
2348                 return true;
2349         else
2350                 return false;
2351 }
2352
2353 static void
2354 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2355 {
2356         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2357         struct TCP_Server_Info *pserver;
2358         struct cifs_ses *ses;
2359         struct cifs_tcon *tcon;
2360
2361         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2362                 return;
2363
2364         /* If server is a channel, select the primary channel */
2365         pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
2366
2367         spin_lock(&cifs_tcp_ses_lock);
2368         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2369                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2370                         if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2371                                 spin_lock(&tcon->tc_lock);
2372                                 tcon->need_reconnect = true;
2373                                 spin_unlock(&tcon->tc_lock);
2374                                 spin_unlock(&cifs_tcp_ses_lock);
2375                                 pr_warn_once("Server share %s deleted.\n",
2376                                              tcon->tree_name);
2377                                 return;
2378                         }
2379                 }
2380         }
2381         spin_unlock(&cifs_tcp_ses_lock);
2382 }
2383
2384 static int
2385 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2386                 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2387 {
2388         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2389                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2390                                         smb2_get_lease_state(cinode));
2391
2392         return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2393                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2394 }
2395
2396 void
2397 smb2_set_related(struct smb_rqst *rqst)
2398 {
2399         struct smb2_hdr *shdr;
2400
2401         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2402         if (shdr == NULL) {
2403                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2404                 return;
2405         }
2406         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2407 }
2408
2409 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2410
2411 void
2412 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2413 {
2414         struct smb2_hdr *shdr;
2415         struct cifs_ses *ses = tcon->ses;
2416         struct TCP_Server_Info *server = ses->server;
2417         unsigned long len = smb_rqst_len(server, rqst);
2418         int i, num_padding;
2419
2420         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2421         if (shdr == NULL) {
2422                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2423                 return;
2424         }
2425
2426         /* SMB headers in a compound are 8 byte aligned. */
2427
2428         /* No padding needed */
2429         if (!(len & 7))
2430                 goto finished;
2431
2432         num_padding = 8 - (len & 7);
2433         if (!smb3_encryption_required(tcon)) {
2434                 /*
2435                  * If we do not have encryption then we can just add an extra
2436                  * iov for the padding.
2437                  */
2438                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2439                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2440                 rqst->rq_nvec++;
2441                 len += num_padding;
2442         } else {
2443                 /*
2444                  * We can not add a small padding iov for the encryption case
2445                  * because the encryption framework can not handle the padding
2446                  * iovs.
2447                  * We have to flatten this into a single buffer and add
2448                  * the padding to it.
2449                  */
2450                 for (i = 1; i < rqst->rq_nvec; i++) {
2451                         memcpy(rqst->rq_iov[0].iov_base +
2452                                rqst->rq_iov[0].iov_len,
2453                                rqst->rq_iov[i].iov_base,
2454                                rqst->rq_iov[i].iov_len);
2455                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2456                 }
2457                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2458                        0, num_padding);
2459                 rqst->rq_iov[0].iov_len += num_padding;
2460                 len += num_padding;
2461                 rqst->rq_nvec = 1;
2462         }
2463
2464  finished:
2465         shdr->NextCommand = cpu_to_le32(len);
2466 }
2467
2468 /*
2469  * Passes the query info response back to the caller on success.
2470  * Caller need to free this with free_rsp_buf().
2471  */
2472 int
2473 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2474                          const char *path, u32 desired_access,
2475                          u32 class, u32 type, u32 output_len,
2476                          struct kvec *rsp, int *buftype,
2477                          struct cifs_sb_info *cifs_sb)
2478 {
2479         struct cifs_ses *ses = tcon->ses;
2480         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2481         int flags = CIFS_CP_CREATE_CLOSE_OP;
2482         struct smb_rqst rqst[3];
2483         int resp_buftype[3];
2484         struct kvec rsp_iov[3];
2485         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2486         struct kvec qi_iov[1];
2487         struct kvec close_iov[1];
2488         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2489         struct cifs_open_parms oparms;
2490         struct cifs_fid fid;
2491         int rc;
2492         __le16 *utf16_path;
2493         struct cached_fid *cfid = NULL;
2494
2495         if (!path)
2496                 path = "";
2497         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2498         if (!utf16_path)
2499                 return -ENOMEM;
2500
2501         if (smb3_encryption_required(tcon))
2502                 flags |= CIFS_TRANSFORM_REQ;
2503
2504         memset(rqst, 0, sizeof(rqst));
2505         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2506         memset(rsp_iov, 0, sizeof(rsp_iov));
2507
2508         /*
2509          * We can only call this for things we know are directories.
2510          */
2511         if (!strcmp(path, ""))
2512                 open_cached_dir(xid, tcon, path, cifs_sb, false,
2513                                 &cfid); /* cfid null if open dir failed */
2514
2515         memset(&open_iov, 0, sizeof(open_iov));
2516         rqst[0].rq_iov = open_iov;
2517         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2518
2519         oparms = (struct cifs_open_parms) {
2520                 .tcon = tcon,
2521                 .path = path,
2522                 .desired_access = desired_access,
2523                 .disposition = FILE_OPEN,
2524                 .create_options = cifs_create_options(cifs_sb, 0),
2525                 .fid = &fid,
2526         };
2527
2528         rc = SMB2_open_init(tcon, server,
2529                             &rqst[0], &oplock, &oparms, utf16_path);
2530         if (rc)
2531                 goto qic_exit;
2532         smb2_set_next_command(tcon, &rqst[0]);
2533
2534         memset(&qi_iov, 0, sizeof(qi_iov));
2535         rqst[1].rq_iov = qi_iov;
2536         rqst[1].rq_nvec = 1;
2537
2538         if (cfid) {
2539                 rc = SMB2_query_info_init(tcon, server,
2540                                           &rqst[1],
2541                                           cfid->fid.persistent_fid,
2542                                           cfid->fid.volatile_fid,
2543                                           class, type, 0,
2544                                           output_len, 0,
2545                                           NULL);
2546         } else {
2547                 rc = SMB2_query_info_init(tcon, server,
2548                                           &rqst[1],
2549                                           COMPOUND_FID,
2550                                           COMPOUND_FID,
2551                                           class, type, 0,
2552                                           output_len, 0,
2553                                           NULL);
2554         }
2555         if (rc)
2556                 goto qic_exit;
2557         if (!cfid) {
2558                 smb2_set_next_command(tcon, &rqst[1]);
2559                 smb2_set_related(&rqst[1]);
2560         }
2561
2562         memset(&close_iov, 0, sizeof(close_iov));
2563         rqst[2].rq_iov = close_iov;
2564         rqst[2].rq_nvec = 1;
2565
2566         rc = SMB2_close_init(tcon, server,
2567                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2568         if (rc)
2569                 goto qic_exit;
2570         smb2_set_related(&rqst[2]);
2571
2572         if (cfid) {
2573                 rc = compound_send_recv(xid, ses, server,
2574                                         flags, 1, &rqst[1],
2575                                         &resp_buftype[1], &rsp_iov[1]);
2576         } else {
2577                 rc = compound_send_recv(xid, ses, server,
2578                                         flags, 3, rqst,
2579                                         resp_buftype, rsp_iov);
2580         }
2581         if (rc) {
2582                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2583                 if (rc == -EREMCHG) {
2584                         tcon->need_reconnect = true;
2585                         pr_warn_once("server share %s deleted\n",
2586                                      tcon->tree_name);
2587                 }
2588                 goto qic_exit;
2589         }
2590         *rsp = rsp_iov[1];
2591         *buftype = resp_buftype[1];
2592
2593  qic_exit:
2594         kfree(utf16_path);
2595         SMB2_open_free(&rqst[0]);
2596         SMB2_query_info_free(&rqst[1]);
2597         SMB2_close_free(&rqst[2]);
2598         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2599         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2600         if (cfid)
2601                 close_cached_dir(cfid);
2602         return rc;
2603 }
2604
2605 static int
2606 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2607              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2608 {
2609         struct smb2_query_info_rsp *rsp;
2610         struct smb2_fs_full_size_info *info = NULL;
2611         struct kvec rsp_iov = {NULL, 0};
2612         int buftype = CIFS_NO_BUFFER;
2613         int rc;
2614
2615
2616         rc = smb2_query_info_compound(xid, tcon, "",
2617                                       FILE_READ_ATTRIBUTES,
2618                                       FS_FULL_SIZE_INFORMATION,
2619                                       SMB2_O_INFO_FILESYSTEM,
2620                                       sizeof(struct smb2_fs_full_size_info),
2621                                       &rsp_iov, &buftype, cifs_sb);
2622         if (rc)
2623                 goto qfs_exit;
2624
2625         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2626         buf->f_type = SMB2_SUPER_MAGIC;
2627         info = (struct smb2_fs_full_size_info *)(
2628                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2629         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2630                                le32_to_cpu(rsp->OutputBufferLength),
2631                                &rsp_iov,
2632                                sizeof(struct smb2_fs_full_size_info));
2633         if (!rc)
2634                 smb2_copy_fs_info_to_kstatfs(info, buf);
2635
2636 qfs_exit:
2637         free_rsp_buf(buftype, rsp_iov.iov_base);
2638         return rc;
2639 }
2640
2641 static int
2642 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2643                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2644 {
2645         int rc;
2646         __le16 srch_path = 0; /* Null - open root of share */
2647         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2648         struct cifs_open_parms oparms;
2649         struct cifs_fid fid;
2650
2651         if (!tcon->posix_extensions)
2652                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2653
2654         oparms = (struct cifs_open_parms) {
2655                 .tcon = tcon,
2656                 .path = "",
2657                 .desired_access = FILE_READ_ATTRIBUTES,
2658                 .disposition = FILE_OPEN,
2659                 .create_options = cifs_create_options(cifs_sb, 0),
2660                 .fid = &fid,
2661         };
2662
2663         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2664                        NULL, NULL);
2665         if (rc)
2666                 return rc;
2667
2668         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2669                                    fid.volatile_fid, buf);
2670         buf->f_type = SMB2_SUPER_MAGIC;
2671         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2672         return rc;
2673 }
2674
2675 static bool
2676 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2677 {
2678         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2679                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2680 }
2681
2682 static int
2683 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2684                __u64 length, __u32 type, int lock, int unlock, bool wait)
2685 {
2686         if (unlock && !lock)
2687                 type = SMB2_LOCKFLAG_UNLOCK;
2688         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2689                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2690                          current->tgid, length, offset, type, wait);
2691 }
2692
2693 static void
2694 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2695 {
2696         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2697 }
2698
2699 static void
2700 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2701 {
2702         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2703 }
2704
2705 static void
2706 smb2_new_lease_key(struct cifs_fid *fid)
2707 {
2708         generate_random_uuid(fid->lease_key);
2709 }
2710
2711 static int
2712 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2713                    const char *search_name,
2714                    struct dfs_info3_param **target_nodes,
2715                    unsigned int *num_of_nodes,
2716                    const struct nls_table *nls_codepage, int remap)
2717 {
2718         int rc;
2719         __le16 *utf16_path = NULL;
2720         int utf16_path_len = 0;
2721         struct cifs_tcon *tcon;
2722         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2723         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2724         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2725         int retry_count = 0;
2726
2727         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2728
2729         /*
2730          * Try to use the IPC tcon, otherwise just use any
2731          */
2732         tcon = ses->tcon_ipc;
2733         if (tcon == NULL) {
2734                 spin_lock(&cifs_tcp_ses_lock);
2735                 tcon = list_first_entry_or_null(&ses->tcon_list,
2736                                                 struct cifs_tcon,
2737                                                 tcon_list);
2738                 if (tcon)
2739                         tcon->tc_count++;
2740                 spin_unlock(&cifs_tcp_ses_lock);
2741         }
2742
2743         if (tcon == NULL) {
2744                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2745                          ses);
2746                 rc = -ENOTCONN;
2747                 goto out;
2748         }
2749
2750         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2751                                            &utf16_path_len,
2752                                            nls_codepage, remap);
2753         if (!utf16_path) {
2754                 rc = -ENOMEM;
2755                 goto out;
2756         }
2757
2758         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2759         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2760         if (!dfs_req) {
2761                 rc = -ENOMEM;
2762                 goto out;
2763         }
2764
2765         /* Highest DFS referral version understood */
2766         dfs_req->MaxReferralLevel = DFS_VERSION;
2767
2768         /* Path to resolve in an UTF-16 null-terminated string */
2769         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2770
2771         do {
2772                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2773                                 FSCTL_DFS_GET_REFERRALS,
2774                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2775                                 (char **)&dfs_rsp, &dfs_rsp_size);
2776                 if (!is_retryable_error(rc))
2777                         break;
2778                 usleep_range(512, 2048);
2779         } while (++retry_count < 5);
2780
2781         if (rc) {
2782                 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2783                         cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2784                 goto out;
2785         }
2786
2787         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2788                                  num_of_nodes, target_nodes,
2789                                  nls_codepage, remap, search_name,
2790                                  true /* is_unicode */);
2791         if (rc) {
2792                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2793                 goto out;
2794         }
2795
2796  out:
2797         if (tcon && !tcon->ipc) {
2798                 /* ipc tcons are not refcounted */
2799                 spin_lock(&cifs_tcp_ses_lock);
2800                 tcon->tc_count--;
2801                 /* tc_count can never go negative */
2802                 WARN_ON(tcon->tc_count < 0);
2803                 spin_unlock(&cifs_tcp_ses_lock);
2804         }
2805         kfree(utf16_path);
2806         kfree(dfs_req);
2807         kfree(dfs_rsp);
2808         return rc;
2809 }
2810
2811 static int
2812 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2813                       u32 plen, char **target_path,
2814                       struct cifs_sb_info *cifs_sb)
2815 {
2816         unsigned int len;
2817
2818         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2819         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2820
2821         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2822                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2823                         le64_to_cpu(symlink_buf->InodeType));
2824                 return -EOPNOTSUPP;
2825         }
2826
2827         *target_path = cifs_strndup_from_utf16(
2828                                 symlink_buf->PathBuffer,
2829                                 len, true, cifs_sb->local_nls);
2830         if (!(*target_path))
2831                 return -ENOMEM;
2832
2833         convert_delimiter(*target_path, '/');
2834         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2835
2836         return 0;
2837 }
2838
2839 static int
2840 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2841                       u32 plen, char **target_path,
2842                       struct cifs_sb_info *cifs_sb)
2843 {
2844         unsigned int sub_len;
2845         unsigned int sub_offset;
2846
2847         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2848
2849         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2850         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2851         if (sub_offset + 20 > plen ||
2852             sub_offset + sub_len + 20 > plen) {
2853                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2854                 return -EIO;
2855         }
2856
2857         *target_path = cifs_strndup_from_utf16(
2858                                 symlink_buf->PathBuffer + sub_offset,
2859                                 sub_len, true, cifs_sb->local_nls);
2860         if (!(*target_path))
2861                 return -ENOMEM;
2862
2863         convert_delimiter(*target_path, '/');
2864         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2865
2866         return 0;
2867 }
2868
2869 static int
2870 parse_reparse_point(struct reparse_data_buffer *buf,
2871                     u32 plen, char **target_path,
2872                     struct cifs_sb_info *cifs_sb)
2873 {
2874         if (plen < sizeof(struct reparse_data_buffer)) {
2875                 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2876                          plen);
2877                 return -EIO;
2878         }
2879
2880         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2881             sizeof(struct reparse_data_buffer)) {
2882                 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2883                          plen);
2884                 return -EIO;
2885         }
2886
2887         /* See MS-FSCC 2.1.2 */
2888         switch (le32_to_cpu(buf->ReparseTag)) {
2889         case IO_REPARSE_TAG_NFS:
2890                 return parse_reparse_posix(
2891                         (struct reparse_posix_data *)buf,
2892                         plen, target_path, cifs_sb);
2893         case IO_REPARSE_TAG_SYMLINK:
2894                 return parse_reparse_symlink(
2895                         (struct reparse_symlink_data_buffer *)buf,
2896                         plen, target_path, cifs_sb);
2897         default:
2898                 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
2899                          le32_to_cpu(buf->ReparseTag));
2900                 return -EOPNOTSUPP;
2901         }
2902 }
2903
2904 static int
2905 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2906                    struct cifs_sb_info *cifs_sb, const char *full_path,
2907                    char **target_path, bool is_reparse_point)
2908 {
2909         int rc;
2910         __le16 *utf16_path = NULL;
2911         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2912         struct cifs_open_parms oparms;
2913         struct cifs_fid fid;
2914         struct kvec err_iov = {NULL, 0};
2915         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2916         int flags = CIFS_CP_CREATE_CLOSE_OP;
2917         struct smb_rqst rqst[3];
2918         int resp_buftype[3];
2919         struct kvec rsp_iov[3];
2920         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2921         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2922         struct kvec close_iov[1];
2923         struct smb2_create_rsp *create_rsp;
2924         struct smb2_ioctl_rsp *ioctl_rsp;
2925         struct reparse_data_buffer *reparse_buf;
2926         int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
2927         u32 plen;
2928
2929         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2930
2931         *target_path = NULL;
2932
2933         if (smb3_encryption_required(tcon))
2934                 flags |= CIFS_TRANSFORM_REQ;
2935
2936         memset(rqst, 0, sizeof(rqst));
2937         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2938         memset(rsp_iov, 0, sizeof(rsp_iov));
2939
2940         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2941         if (!utf16_path)
2942                 return -ENOMEM;
2943
2944         /* Open */
2945         memset(&open_iov, 0, sizeof(open_iov));
2946         rqst[0].rq_iov = open_iov;
2947         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2948
2949         oparms = (struct cifs_open_parms) {
2950                 .tcon = tcon,
2951                 .path = full_path,
2952                 .desired_access = FILE_READ_ATTRIBUTES,
2953                 .disposition = FILE_OPEN,
2954                 .create_options = cifs_create_options(cifs_sb, create_options),
2955                 .fid = &fid,
2956         };
2957
2958         rc = SMB2_open_init(tcon, server,
2959                             &rqst[0], &oplock, &oparms, utf16_path);
2960         if (rc)
2961                 goto querty_exit;
2962         smb2_set_next_command(tcon, &rqst[0]);
2963
2964
2965         /* IOCTL */
2966         memset(&io_iov, 0, sizeof(io_iov));
2967         rqst[1].rq_iov = io_iov;
2968         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2969
2970         rc = SMB2_ioctl_init(tcon, server,
2971                              &rqst[1], fid.persistent_fid,
2972                              fid.volatile_fid, FSCTL_GET_REPARSE_POINT, NULL, 0,
2973                              CIFSMaxBufSize -
2974                              MAX_SMB2_CREATE_RESPONSE_SIZE -
2975                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
2976         if (rc)
2977                 goto querty_exit;
2978
2979         smb2_set_next_command(tcon, &rqst[1]);
2980         smb2_set_related(&rqst[1]);
2981
2982
2983         /* Close */
2984         memset(&close_iov, 0, sizeof(close_iov));
2985         rqst[2].rq_iov = close_iov;
2986         rqst[2].rq_nvec = 1;
2987
2988         rc = SMB2_close_init(tcon, server,
2989                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2990         if (rc)
2991                 goto querty_exit;
2992
2993         smb2_set_related(&rqst[2]);
2994
2995         rc = compound_send_recv(xid, tcon->ses, server,
2996                                 flags, 3, rqst,
2997                                 resp_buftype, rsp_iov);
2998
2999         create_rsp = rsp_iov[0].iov_base;
3000         if (create_rsp && create_rsp->hdr.Status)
3001                 err_iov = rsp_iov[0];
3002         ioctl_rsp = rsp_iov[1].iov_base;
3003
3004         /*
3005          * Open was successful and we got an ioctl response.
3006          */
3007         if ((rc == 0) && (is_reparse_point)) {
3008                 /* See MS-FSCC 2.3.23 */
3009
3010                 reparse_buf = (struct reparse_data_buffer *)
3011                         ((char *)ioctl_rsp +
3012                          le32_to_cpu(ioctl_rsp->OutputOffset));
3013                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3014
3015                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3016                     rsp_iov[1].iov_len) {
3017                         cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
3018                                  plen);
3019                         rc = -EIO;
3020                         goto querty_exit;
3021                 }
3022
3023                 rc = parse_reparse_point(reparse_buf, plen, target_path,
3024                                          cifs_sb);
3025                 goto querty_exit;
3026         }
3027
3028         if (!rc || !err_iov.iov_base) {
3029                 rc = -ENOENT;
3030                 goto querty_exit;
3031         }
3032
3033         rc = smb2_parse_symlink_response(cifs_sb, &err_iov, target_path);
3034
3035  querty_exit:
3036         cifs_dbg(FYI, "query symlink rc %d\n", rc);
3037         kfree(utf16_path);
3038         SMB2_open_free(&rqst[0]);
3039         SMB2_ioctl_free(&rqst[1]);
3040         SMB2_close_free(&rqst[2]);
3041         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3042         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3043         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3044         return rc;
3045 }
3046
3047 int
3048 smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
3049                    struct cifs_sb_info *cifs_sb, const char *full_path,
3050                    __u32 *tag)
3051 {
3052         int rc;
3053         __le16 *utf16_path = NULL;
3054         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3055         struct cifs_open_parms oparms;
3056         struct cifs_fid fid;
3057         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3058         int flags = CIFS_CP_CREATE_CLOSE_OP;
3059         struct smb_rqst rqst[3];
3060         int resp_buftype[3];
3061         struct kvec rsp_iov[3];
3062         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3063         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3064         struct kvec close_iov[1];
3065         struct smb2_ioctl_rsp *ioctl_rsp;
3066         struct reparse_data_buffer *reparse_buf;
3067         u32 plen;
3068
3069         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3070
3071         if (smb3_encryption_required(tcon))
3072                 flags |= CIFS_TRANSFORM_REQ;
3073
3074         memset(rqst, 0, sizeof(rqst));
3075         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3076         memset(rsp_iov, 0, sizeof(rsp_iov));
3077
3078         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3079         if (!utf16_path)
3080                 return -ENOMEM;
3081
3082         /*
3083          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3084          * to see if there is a handle already open that we can use
3085          */
3086         memset(&open_iov, 0, sizeof(open_iov));
3087         rqst[0].rq_iov = open_iov;
3088         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3089
3090         oparms = (struct cifs_open_parms) {
3091                 .tcon = tcon,
3092                 .path = full_path,
3093                 .desired_access = FILE_READ_ATTRIBUTES,
3094                 .disposition = FILE_OPEN,
3095                 .create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
3096                 .fid = &fid,
3097         };
3098
3099         rc = SMB2_open_init(tcon, server,
3100                             &rqst[0], &oplock, &oparms, utf16_path);
3101         if (rc)
3102                 goto query_rp_exit;
3103         smb2_set_next_command(tcon, &rqst[0]);
3104
3105
3106         /* IOCTL */
3107         memset(&io_iov, 0, sizeof(io_iov));
3108         rqst[1].rq_iov = io_iov;
3109         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3110
3111         rc = SMB2_ioctl_init(tcon, server,
3112                              &rqst[1], COMPOUND_FID,
3113                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3114                              CIFSMaxBufSize -
3115                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3116                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3117         if (rc)
3118                 goto query_rp_exit;
3119
3120         smb2_set_next_command(tcon, &rqst[1]);
3121         smb2_set_related(&rqst[1]);
3122
3123
3124         /* Close */
3125         memset(&close_iov, 0, sizeof(close_iov));
3126         rqst[2].rq_iov = close_iov;
3127         rqst[2].rq_nvec = 1;
3128
3129         rc = SMB2_close_init(tcon, server,
3130                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3131         if (rc)
3132                 goto query_rp_exit;
3133
3134         smb2_set_related(&rqst[2]);
3135
3136         rc = compound_send_recv(xid, tcon->ses, server,
3137                                 flags, 3, rqst,
3138                                 resp_buftype, rsp_iov);
3139
3140         ioctl_rsp = rsp_iov[1].iov_base;
3141
3142         /*
3143          * Open was successful and we got an ioctl response.
3144          */
3145         if (rc == 0) {
3146                 /* See MS-FSCC 2.3.23 */
3147
3148                 reparse_buf = (struct reparse_data_buffer *)
3149                         ((char *)ioctl_rsp +
3150                          le32_to_cpu(ioctl_rsp->OutputOffset));
3151                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3152
3153                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3154                     rsp_iov[1].iov_len) {
3155                         cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3156                                  plen);
3157                         rc = -EIO;
3158                         goto query_rp_exit;
3159                 }
3160                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3161         }
3162
3163  query_rp_exit:
3164         kfree(utf16_path);
3165         SMB2_open_free(&rqst[0]);
3166         SMB2_ioctl_free(&rqst[1]);
3167         SMB2_close_free(&rqst[2]);
3168         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3169         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3170         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3171         return rc;
3172 }
3173
3174 static struct cifs_ntsd *
3175 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3176                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3177 {
3178         struct cifs_ntsd *pntsd = NULL;
3179         unsigned int xid;
3180         int rc = -EOPNOTSUPP;
3181         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3182
3183         if (IS_ERR(tlink))
3184                 return ERR_CAST(tlink);
3185
3186         xid = get_xid();
3187         cifs_dbg(FYI, "trying to get acl\n");
3188
3189         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3190                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3191                             info);
3192         free_xid(xid);
3193
3194         cifs_put_tlink(tlink);
3195
3196         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3197         if (rc)
3198                 return ERR_PTR(rc);
3199         return pntsd;
3200
3201 }
3202
3203 static struct cifs_ntsd *
3204 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3205                      const char *path, u32 *pacllen, u32 info)
3206 {
3207         struct cifs_ntsd *pntsd = NULL;
3208         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3209         unsigned int xid;
3210         int rc;
3211         struct cifs_tcon *tcon;
3212         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3213         struct cifs_fid fid;
3214         struct cifs_open_parms oparms;
3215         __le16 *utf16_path;
3216
3217         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3218         if (IS_ERR(tlink))
3219                 return ERR_CAST(tlink);
3220
3221         tcon = tlink_tcon(tlink);
3222         xid = get_xid();
3223
3224         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3225         if (!utf16_path) {
3226                 rc = -ENOMEM;
3227                 free_xid(xid);
3228                 return ERR_PTR(rc);
3229         }
3230
3231         oparms = (struct cifs_open_parms) {
3232                 .tcon = tcon,
3233                 .path = path,
3234                 .desired_access = READ_CONTROL,
3235                 .disposition = FILE_OPEN,
3236                 /*
3237                  * When querying an ACL, even if the file is a symlink
3238                  * we want to open the source not the target, and so
3239                  * the protocol requires that the client specify this
3240                  * flag when opening a reparse point
3241                  */
3242                 .create_options = cifs_create_options(cifs_sb, 0) |
3243                                   OPEN_REPARSE_POINT,
3244                 .fid = &fid,
3245         };
3246
3247         if (info & SACL_SECINFO)
3248                 oparms.desired_access |= SYSTEM_SECURITY;
3249
3250         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3251                        NULL);
3252         kfree(utf16_path);
3253         if (!rc) {
3254                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3255                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3256                                     info);
3257                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3258         }
3259
3260         cifs_put_tlink(tlink);
3261         free_xid(xid);
3262
3263         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3264         if (rc)
3265                 return ERR_PTR(rc);
3266         return pntsd;
3267 }
3268
3269 static int
3270 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3271                 struct inode *inode, const char *path, int aclflag)
3272 {
3273         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3274         unsigned int xid;
3275         int rc, access_flags = 0;
3276         struct cifs_tcon *tcon;
3277         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3278         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3279         struct cifs_fid fid;
3280         struct cifs_open_parms oparms;
3281         __le16 *utf16_path;
3282
3283         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3284         if (IS_ERR(tlink))
3285                 return PTR_ERR(tlink);
3286
3287         tcon = tlink_tcon(tlink);
3288         xid = get_xid();
3289
3290         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3291                 access_flags |= WRITE_OWNER;
3292         if (aclflag & CIFS_ACL_SACL)
3293                 access_flags |= SYSTEM_SECURITY;
3294         if (aclflag & CIFS_ACL_DACL)
3295                 access_flags |= WRITE_DAC;
3296
3297         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3298         if (!utf16_path) {
3299                 rc = -ENOMEM;
3300                 free_xid(xid);
3301                 return rc;
3302         }
3303
3304         oparms = (struct cifs_open_parms) {
3305                 .tcon = tcon,
3306                 .desired_access = access_flags,
3307                 .create_options = cifs_create_options(cifs_sb, 0),
3308                 .disposition = FILE_OPEN,
3309                 .path = path,
3310                 .fid = &fid,
3311         };
3312
3313         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3314                        NULL, NULL);
3315         kfree(utf16_path);
3316         if (!rc) {
3317                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3318                             fid.volatile_fid, pnntsd, acllen, aclflag);
3319                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3320         }
3321
3322         cifs_put_tlink(tlink);
3323         free_xid(xid);
3324         return rc;
3325 }
3326
3327 /* Retrieve an ACL from the server */
3328 static struct cifs_ntsd *
3329 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3330              struct inode *inode, const char *path,
3331              u32 *pacllen, u32 info)
3332 {
3333         struct cifs_ntsd *pntsd = NULL;
3334         struct cifsFileInfo *open_file = NULL;
3335
3336         if (inode && !(info & SACL_SECINFO))
3337                 open_file = find_readable_file(CIFS_I(inode), true);
3338         if (!open_file || (info & SACL_SECINFO))
3339                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3340
3341         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3342         cifsFileInfo_put(open_file);
3343         return pntsd;
3344 }
3345
3346 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3347                              loff_t offset, loff_t len, unsigned int xid)
3348 {
3349         struct cifsFileInfo *cfile = file->private_data;
3350         struct file_zero_data_information fsctl_buf;
3351
3352         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3353
3354         fsctl_buf.FileOffset = cpu_to_le64(offset);
3355         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3356
3357         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3358                           cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3359                           (char *)&fsctl_buf,
3360                           sizeof(struct file_zero_data_information),
3361                           0, NULL, NULL);
3362 }
3363
3364 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3365                             loff_t offset, loff_t len, bool keep_size)
3366 {
3367         struct cifs_ses *ses = tcon->ses;
3368         struct inode *inode = file_inode(file);
3369         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3370         struct cifsFileInfo *cfile = file->private_data;
3371         long rc;
3372         unsigned int xid;
3373         __le64 eof;
3374
3375         xid = get_xid();
3376
3377         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3378                               ses->Suid, offset, len);
3379
3380         inode_lock(inode);
3381         filemap_invalidate_lock(inode->i_mapping);
3382
3383         /*
3384          * We zero the range through ioctl, so we need remove the page caches
3385          * first, otherwise the data may be inconsistent with the server.
3386          */
3387         truncate_pagecache_range(inode, offset, offset + len - 1);
3388
3389         /* if file not oplocked can't be sure whether asking to extend size */
3390         rc = -EOPNOTSUPP;
3391         if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3392                 goto zero_range_exit;
3393
3394         rc = smb3_zero_data(file, tcon, offset, len, xid);
3395         if (rc < 0)
3396                 goto zero_range_exit;
3397
3398         /*
3399          * do we also need to change the size of the file?
3400          */
3401         if (keep_size == false && i_size_read(inode) < offset + len) {
3402                 eof = cpu_to_le64(offset + len);
3403                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3404                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3405         }
3406
3407  zero_range_exit:
3408         filemap_invalidate_unlock(inode->i_mapping);
3409         inode_unlock(inode);
3410         free_xid(xid);
3411         if (rc)
3412                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3413                               ses->Suid, offset, len, rc);
3414         else
3415                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3416                               ses->Suid, offset, len);
3417         return rc;
3418 }
3419
3420 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3421                             loff_t offset, loff_t len)
3422 {
3423         struct inode *inode = file_inode(file);
3424         struct cifsFileInfo *cfile = file->private_data;
3425         struct file_zero_data_information fsctl_buf;
3426         long rc;
3427         unsigned int xid;
3428         __u8 set_sparse = 1;
3429
3430         xid = get_xid();
3431
3432         inode_lock(inode);
3433         /* Need to make file sparse, if not already, before freeing range. */
3434         /* Consider adding equivalent for compressed since it could also work */
3435         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3436                 rc = -EOPNOTSUPP;
3437                 goto out;
3438         }
3439
3440         filemap_invalidate_lock(inode->i_mapping);
3441         /*
3442          * We implement the punch hole through ioctl, so we need remove the page
3443          * caches first, otherwise the data may be inconsistent with the server.
3444          */
3445         truncate_pagecache_range(inode, offset, offset + len - 1);
3446
3447         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3448
3449         fsctl_buf.FileOffset = cpu_to_le64(offset);
3450         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3451
3452         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3453                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3454                         (char *)&fsctl_buf,
3455                         sizeof(struct file_zero_data_information),
3456                         CIFSMaxBufSize, NULL, NULL);
3457         filemap_invalidate_unlock(inode->i_mapping);
3458 out:
3459         inode_unlock(inode);
3460         free_xid(xid);
3461         return rc;
3462 }
3463
3464 static int smb3_simple_fallocate_write_range(unsigned int xid,
3465                                              struct cifs_tcon *tcon,
3466                                              struct cifsFileInfo *cfile,
3467                                              loff_t off, loff_t len,
3468                                              char *buf)
3469 {
3470         struct cifs_io_parms io_parms = {0};
3471         int nbytes;
3472         int rc = 0;
3473         struct kvec iov[2];
3474
3475         io_parms.netfid = cfile->fid.netfid;
3476         io_parms.pid = current->tgid;
3477         io_parms.tcon = tcon;
3478         io_parms.persistent_fid = cfile->fid.persistent_fid;
3479         io_parms.volatile_fid = cfile->fid.volatile_fid;
3480
3481         while (len) {
3482                 io_parms.offset = off;
3483                 io_parms.length = len;
3484                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3485                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3486                 /* iov[0] is reserved for smb header */
3487                 iov[1].iov_base = buf;
3488                 iov[1].iov_len = io_parms.length;
3489                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3490                 if (rc)
3491                         break;
3492                 if (nbytes > len)
3493                         return -EINVAL;
3494                 buf += nbytes;
3495                 off += nbytes;
3496                 len -= nbytes;
3497         }
3498         return rc;
3499 }
3500
3501 static int smb3_simple_fallocate_range(unsigned int xid,
3502                                        struct cifs_tcon *tcon,
3503                                        struct cifsFileInfo *cfile,
3504                                        loff_t off, loff_t len)
3505 {
3506         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3507         u32 out_data_len;
3508         char *buf = NULL;
3509         loff_t l;
3510         int rc;
3511
3512         in_data.file_offset = cpu_to_le64(off);
3513         in_data.length = cpu_to_le64(len);
3514         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3515                         cfile->fid.volatile_fid,
3516                         FSCTL_QUERY_ALLOCATED_RANGES,
3517                         (char *)&in_data, sizeof(in_data),
3518                         1024 * sizeof(struct file_allocated_range_buffer),
3519                         (char **)&out_data, &out_data_len);
3520         if (rc)
3521                 goto out;
3522
3523         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3524         if (buf == NULL) {
3525                 rc = -ENOMEM;
3526                 goto out;
3527         }
3528
3529         tmp_data = out_data;
3530         while (len) {
3531                 /*
3532                  * The rest of the region is unmapped so write it all.
3533                  */
3534                 if (out_data_len == 0) {
3535                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3536                                                cfile, off, len, buf);
3537                         goto out;
3538                 }
3539
3540                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3541                         rc = -EINVAL;
3542                         goto out;
3543                 }
3544
3545                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3546                         /*
3547                          * We are at a hole. Write until the end of the region
3548                          * or until the next allocated data,
3549                          * whichever comes next.
3550                          */
3551                         l = le64_to_cpu(tmp_data->file_offset) - off;
3552                         if (len < l)
3553                                 l = len;
3554                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3555                                                cfile, off, l, buf);
3556                         if (rc)
3557                                 goto out;
3558                         off = off + l;
3559                         len = len - l;
3560                         if (len == 0)
3561                                 goto out;
3562                 }
3563                 /*
3564                  * We are at a section of allocated data, just skip forward
3565                  * until the end of the data or the end of the region
3566                  * we are supposed to fallocate, whichever comes first.
3567                  */
3568                 l = le64_to_cpu(tmp_data->length);
3569                 if (len < l)
3570                         l = len;
3571                 off += l;
3572                 len -= l;
3573
3574                 tmp_data = &tmp_data[1];
3575                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3576         }
3577
3578  out:
3579         kfree(out_data);
3580         kfree(buf);
3581         return rc;
3582 }
3583
3584
3585 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3586                             loff_t off, loff_t len, bool keep_size)
3587 {
3588         struct inode *inode;
3589         struct cifsInodeInfo *cifsi;
3590         struct cifsFileInfo *cfile = file->private_data;
3591         long rc = -EOPNOTSUPP;
3592         unsigned int xid;
3593         __le64 eof;
3594
3595         xid = get_xid();
3596
3597         inode = d_inode(cfile->dentry);
3598         cifsi = CIFS_I(inode);
3599
3600         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3601                                 tcon->ses->Suid, off, len);
3602         /* if file not oplocked can't be sure whether asking to extend size */
3603         if (!CIFS_CACHE_READ(cifsi))
3604                 if (keep_size == false) {
3605                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3606                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3607                         free_xid(xid);
3608                         return rc;
3609                 }
3610
3611         /*
3612          * Extending the file
3613          */
3614         if ((keep_size == false) && i_size_read(inode) < off + len) {
3615                 rc = inode_newsize_ok(inode, off + len);
3616                 if (rc)
3617                         goto out;
3618
3619                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3620                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3621
3622                 eof = cpu_to_le64(off + len);
3623                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3624                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3625                 if (rc == 0) {
3626                         cifsi->server_eof = off + len;
3627                         cifs_setsize(inode, off + len);
3628                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3629                         truncate_setsize(inode, off + len);
3630                 }
3631                 goto out;
3632         }
3633
3634         /*
3635          * Files are non-sparse by default so falloc may be a no-op
3636          * Must check if file sparse. If not sparse, and since we are not
3637          * extending then no need to do anything since file already allocated
3638          */
3639         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3640                 rc = 0;
3641                 goto out;
3642         }
3643
3644         if (keep_size == true) {
3645                 /*
3646                  * We can not preallocate pages beyond the end of the file
3647                  * in SMB2
3648                  */
3649                 if (off >= i_size_read(inode)) {
3650                         rc = 0;
3651                         goto out;
3652                 }
3653                 /*
3654                  * For fallocates that are partially beyond the end of file,
3655                  * clamp len so we only fallocate up to the end of file.
3656                  */
3657                 if (off + len > i_size_read(inode)) {
3658                         len = i_size_read(inode) - off;
3659                 }
3660         }
3661
3662         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3663                 /*
3664                  * At this point, we are trying to fallocate an internal
3665                  * regions of a sparse file. Since smb2 does not have a
3666                  * fallocate command we have two otions on how to emulate this.
3667                  * We can either turn the entire file to become non-sparse
3668                  * which we only do if the fallocate is for virtually
3669                  * the whole file,  or we can overwrite the region with zeroes
3670                  * using SMB2_write, which could be prohibitevly expensive
3671                  * if len is large.
3672                  */
3673                 /*
3674                  * We are only trying to fallocate a small region so
3675                  * just write it with zero.
3676                  */
3677                 if (len <= 1024 * 1024) {
3678                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3679                                                          off, len);
3680                         goto out;
3681                 }
3682
3683                 /*
3684                  * Check if falloc starts within first few pages of file
3685                  * and ends within a few pages of the end of file to
3686                  * ensure that most of file is being forced to be
3687                  * fallocated now. If so then setting whole file sparse
3688                  * ie potentially making a few extra pages at the beginning
3689                  * or end of the file non-sparse via set_sparse is harmless.
3690                  */
3691                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3692                         rc = -EOPNOTSUPP;
3693                         goto out;
3694                 }
3695         }
3696
3697         smb2_set_sparse(xid, tcon, cfile, inode, false);
3698         rc = 0;
3699
3700 out:
3701         if (rc)
3702                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3703                                 tcon->ses->Suid, off, len, rc);
3704         else
3705                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3706                                 tcon->ses->Suid, off, len);
3707
3708         free_xid(xid);
3709         return rc;
3710 }
3711
3712 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3713                             loff_t off, loff_t len)
3714 {
3715         int rc;
3716         unsigned int xid;
3717         struct inode *inode = file_inode(file);
3718         struct cifsFileInfo *cfile = file->private_data;
3719         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3720         __le64 eof;
3721         loff_t old_eof;
3722
3723         xid = get_xid();
3724
3725         inode_lock(inode);
3726
3727         old_eof = i_size_read(inode);
3728         if ((off >= old_eof) ||
3729             off + len >= old_eof) {
3730                 rc = -EINVAL;
3731                 goto out;
3732         }
3733
3734         filemap_invalidate_lock(inode->i_mapping);
3735         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3736         if (rc < 0)
3737                 goto out_2;
3738
3739         truncate_pagecache_range(inode, off, old_eof);
3740
3741         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3742                                   old_eof - off - len, off);
3743         if (rc < 0)
3744                 goto out_2;
3745
3746         eof = cpu_to_le64(old_eof - len);
3747         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3748                           cfile->fid.volatile_fid, cfile->pid, &eof);
3749         if (rc < 0)
3750                 goto out_2;
3751
3752         rc = 0;
3753
3754         cifsi->server_eof = i_size_read(inode) - len;
3755         truncate_setsize(inode, cifsi->server_eof);
3756         fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3757 out_2:
3758         filemap_invalidate_unlock(inode->i_mapping);
3759  out:
3760         inode_unlock(inode);
3761         free_xid(xid);
3762         return rc;
3763 }
3764
3765 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3766                               loff_t off, loff_t len)
3767 {
3768         int rc;
3769         unsigned int xid;
3770         struct cifsFileInfo *cfile = file->private_data;
3771         struct inode *inode = file_inode(file);
3772         __le64 eof;
3773         __u64  count, old_eof;
3774
3775         xid = get_xid();
3776
3777         inode_lock(inode);
3778
3779         old_eof = i_size_read(inode);
3780         if (off >= old_eof) {
3781                 rc = -EINVAL;
3782                 goto out;
3783         }
3784
3785         count = old_eof - off;
3786         eof = cpu_to_le64(old_eof + len);
3787
3788         filemap_invalidate_lock(inode->i_mapping);
3789         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3790         if (rc < 0)
3791                 goto out_2;
3792         truncate_pagecache_range(inode, off, old_eof);
3793
3794         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3795                           cfile->fid.volatile_fid, cfile->pid, &eof);
3796         if (rc < 0)
3797                 goto out_2;
3798
3799         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3800         if (rc < 0)
3801                 goto out_2;
3802
3803         rc = smb3_zero_data(file, tcon, off, len, xid);
3804         if (rc < 0)
3805                 goto out_2;
3806
3807         rc = 0;
3808 out_2:
3809         filemap_invalidate_unlock(inode->i_mapping);
3810  out:
3811         inode_unlock(inode);
3812         free_xid(xid);
3813         return rc;
3814 }
3815
3816 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3817 {
3818         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3819         struct cifsInodeInfo *cifsi;
3820         struct inode *inode;
3821         int rc = 0;
3822         struct file_allocated_range_buffer in_data, *out_data = NULL;
3823         u32 out_data_len;
3824         unsigned int xid;
3825
3826         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3827                 return generic_file_llseek(file, offset, whence);
3828
3829         inode = d_inode(cfile->dentry);
3830         cifsi = CIFS_I(inode);
3831
3832         if (offset < 0 || offset >= i_size_read(inode))
3833                 return -ENXIO;
3834
3835         xid = get_xid();
3836         /*
3837          * We need to be sure that all dirty pages are written as they
3838          * might fill holes on the server.
3839          * Note that we also MUST flush any written pages since at least
3840          * some servers (Windows2016) will not reflect recent writes in
3841          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3842          */
3843         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3844         if (wrcfile) {
3845                 filemap_write_and_wait(inode->i_mapping);
3846                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3847                 cifsFileInfo_put(wrcfile);
3848         }
3849
3850         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3851                 if (whence == SEEK_HOLE)
3852                         offset = i_size_read(inode);
3853                 goto lseek_exit;
3854         }
3855
3856         in_data.file_offset = cpu_to_le64(offset);
3857         in_data.length = cpu_to_le64(i_size_read(inode));
3858
3859         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3860                         cfile->fid.volatile_fid,
3861                         FSCTL_QUERY_ALLOCATED_RANGES,
3862                         (char *)&in_data, sizeof(in_data),
3863                         sizeof(struct file_allocated_range_buffer),
3864                         (char **)&out_data, &out_data_len);
3865         if (rc == -E2BIG)
3866                 rc = 0;
3867         if (rc)
3868                 goto lseek_exit;
3869
3870         if (whence == SEEK_HOLE && out_data_len == 0)
3871                 goto lseek_exit;
3872
3873         if (whence == SEEK_DATA && out_data_len == 0) {
3874                 rc = -ENXIO;
3875                 goto lseek_exit;
3876         }
3877
3878         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3879                 rc = -EINVAL;
3880                 goto lseek_exit;
3881         }
3882         if (whence == SEEK_DATA) {
3883                 offset = le64_to_cpu(out_data->file_offset);
3884                 goto lseek_exit;
3885         }
3886         if (offset < le64_to_cpu(out_data->file_offset))
3887                 goto lseek_exit;
3888
3889         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3890
3891  lseek_exit:
3892         free_xid(xid);
3893         kfree(out_data);
3894         if (!rc)
3895                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3896         else
3897                 return rc;
3898 }
3899
3900 static int smb3_fiemap(struct cifs_tcon *tcon,
3901                        struct cifsFileInfo *cfile,
3902                        struct fiemap_extent_info *fei, u64 start, u64 len)
3903 {
3904         unsigned int xid;
3905         struct file_allocated_range_buffer in_data, *out_data;
3906         u32 out_data_len;
3907         int i, num, rc, flags, last_blob;
3908         u64 next;
3909
3910         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3911         if (rc)
3912                 return rc;
3913
3914         xid = get_xid();
3915  again:
3916         in_data.file_offset = cpu_to_le64(start);
3917         in_data.length = cpu_to_le64(len);
3918
3919         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3920                         cfile->fid.volatile_fid,
3921                         FSCTL_QUERY_ALLOCATED_RANGES,
3922                         (char *)&in_data, sizeof(in_data),
3923                         1024 * sizeof(struct file_allocated_range_buffer),
3924                         (char **)&out_data, &out_data_len);
3925         if (rc == -E2BIG) {
3926                 last_blob = 0;
3927                 rc = 0;
3928         } else
3929                 last_blob = 1;
3930         if (rc)
3931                 goto out;
3932
3933         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3934                 rc = -EINVAL;
3935                 goto out;
3936         }
3937         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3938                 rc = -EINVAL;
3939                 goto out;
3940         }
3941
3942         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3943         for (i = 0; i < num; i++) {
3944                 flags = 0;
3945                 if (i == num - 1 && last_blob)
3946                         flags |= FIEMAP_EXTENT_LAST;
3947
3948                 rc = fiemap_fill_next_extent(fei,
3949                                 le64_to_cpu(out_data[i].file_offset),
3950                                 le64_to_cpu(out_data[i].file_offset),
3951                                 le64_to_cpu(out_data[i].length),
3952                                 flags);
3953                 if (rc < 0)
3954                         goto out;
3955                 if (rc == 1) {
3956                         rc = 0;
3957                         goto out;
3958                 }
3959         }
3960
3961         if (!last_blob) {
3962                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3963                   le64_to_cpu(out_data[num - 1].length);
3964                 len = len - (next - start);
3965                 start = next;
3966                 goto again;
3967         }
3968
3969  out:
3970         free_xid(xid);
3971         kfree(out_data);
3972         return rc;
3973 }
3974
3975 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3976                            loff_t off, loff_t len)
3977 {
3978         /* KEEP_SIZE already checked for by do_fallocate */
3979         if (mode & FALLOC_FL_PUNCH_HOLE)
3980                 return smb3_punch_hole(file, tcon, off, len);
3981         else if (mode & FALLOC_FL_ZERO_RANGE) {
3982                 if (mode & FALLOC_FL_KEEP_SIZE)
3983                         return smb3_zero_range(file, tcon, off, len, true);
3984                 return smb3_zero_range(file, tcon, off, len, false);
3985         } else if (mode == FALLOC_FL_KEEP_SIZE)
3986                 return smb3_simple_falloc(file, tcon, off, len, true);
3987         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3988                 return smb3_collapse_range(file, tcon, off, len);
3989         else if (mode == FALLOC_FL_INSERT_RANGE)
3990                 return smb3_insert_range(file, tcon, off, len);
3991         else if (mode == 0)
3992                 return smb3_simple_falloc(file, tcon, off, len, false);
3993
3994         return -EOPNOTSUPP;
3995 }
3996
3997 static void
3998 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3999                       struct cifsInodeInfo *cinode, __u32 oplock,
4000                       unsigned int epoch, bool *purge_cache)
4001 {
4002         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
4003 }
4004
4005 static void
4006 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4007                        unsigned int epoch, bool *purge_cache);
4008
4009 static void
4010 smb3_downgrade_oplock(struct TCP_Server_Info *server,
4011                        struct cifsInodeInfo *cinode, __u32 oplock,
4012                        unsigned int epoch, bool *purge_cache)
4013 {
4014         unsigned int old_state = cinode->oplock;
4015         unsigned int old_epoch = cinode->epoch;
4016         unsigned int new_state;
4017
4018         if (epoch > old_epoch) {
4019                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
4020                 cinode->epoch = epoch;
4021         }
4022
4023         new_state = cinode->oplock;
4024         *purge_cache = false;
4025
4026         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
4027             (new_state & CIFS_CACHE_READ_FLG) == 0)
4028                 *purge_cache = true;
4029         else if (old_state == new_state && (epoch - old_epoch > 1))
4030                 *purge_cache = true;
4031 }
4032
4033 static void
4034 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4035                       unsigned int epoch, bool *purge_cache)
4036 {
4037         oplock &= 0xFF;
4038         cinode->lease_granted = false;
4039         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4040                 return;
4041         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
4042                 cinode->oplock = CIFS_CACHE_RHW_FLG;
4043                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
4044                          &cinode->netfs.inode);
4045         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
4046                 cinode->oplock = CIFS_CACHE_RW_FLG;
4047                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
4048                          &cinode->netfs.inode);
4049         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
4050                 cinode->oplock = CIFS_CACHE_READ_FLG;
4051                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
4052                          &cinode->netfs.inode);
4053         } else
4054                 cinode->oplock = 0;
4055 }
4056
4057 static void
4058 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4059                        unsigned int epoch, bool *purge_cache)
4060 {
4061         char message[5] = {0};
4062         unsigned int new_oplock = 0;
4063
4064         oplock &= 0xFF;
4065         cinode->lease_granted = true;
4066         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4067                 return;
4068
4069         /* Check if the server granted an oplock rather than a lease */
4070         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4071                 return smb2_set_oplock_level(cinode, oplock, epoch,
4072                                              purge_cache);
4073
4074         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4075                 new_oplock |= CIFS_CACHE_READ_FLG;
4076                 strcat(message, "R");
4077         }
4078         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4079                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4080                 strcat(message, "H");
4081         }
4082         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4083                 new_oplock |= CIFS_CACHE_WRITE_FLG;
4084                 strcat(message, "W");
4085         }
4086         if (!new_oplock)
4087                 strncpy(message, "None", sizeof(message));
4088
4089         cinode->oplock = new_oplock;
4090         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4091                  &cinode->netfs.inode);
4092 }
4093
4094 static void
4095 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4096                       unsigned int epoch, bool *purge_cache)
4097 {
4098         unsigned int old_oplock = cinode->oplock;
4099
4100         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4101
4102         if (purge_cache) {
4103                 *purge_cache = false;
4104                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4105                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4106                             (epoch - cinode->epoch > 0))
4107                                 *purge_cache = true;
4108                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4109                                  (epoch - cinode->epoch > 1))
4110                                 *purge_cache = true;
4111                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4112                                  (epoch - cinode->epoch > 1))
4113                                 *purge_cache = true;
4114                         else if (cinode->oplock == 0 &&
4115                                  (epoch - cinode->epoch > 0))
4116                                 *purge_cache = true;
4117                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4118                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4119                             (epoch - cinode->epoch > 0))
4120                                 *purge_cache = true;
4121                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4122                                  (epoch - cinode->epoch > 1))
4123                                 *purge_cache = true;
4124                 }
4125                 cinode->epoch = epoch;
4126         }
4127 }
4128
4129 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4130 static bool
4131 smb2_is_read_op(__u32 oplock)
4132 {
4133         return oplock == SMB2_OPLOCK_LEVEL_II;
4134 }
4135 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4136
4137 static bool
4138 smb21_is_read_op(__u32 oplock)
4139 {
4140         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4141                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4142 }
4143
4144 static __le32
4145 map_oplock_to_lease(u8 oplock)
4146 {
4147         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4148                 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4149         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4150                 return SMB2_LEASE_READ_CACHING_LE;
4151         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4152                 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4153                        SMB2_LEASE_WRITE_CACHING_LE;
4154         return 0;
4155 }
4156
4157 static char *
4158 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4159 {
4160         struct create_lease *buf;
4161
4162         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4163         if (!buf)
4164                 return NULL;
4165
4166         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4167         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4168
4169         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4170                                         (struct create_lease, lcontext));
4171         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4172         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4173                                 (struct create_lease, Name));
4174         buf->ccontext.NameLength = cpu_to_le16(4);
4175         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4176         buf->Name[0] = 'R';
4177         buf->Name[1] = 'q';
4178         buf->Name[2] = 'L';
4179         buf->Name[3] = 's';
4180         return (char *)buf;
4181 }
4182
4183 static char *
4184 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4185 {
4186         struct create_lease_v2 *buf;
4187
4188         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4189         if (!buf)
4190                 return NULL;
4191
4192         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4193         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4194
4195         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4196                                         (struct create_lease_v2, lcontext));
4197         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4198         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4199                                 (struct create_lease_v2, Name));
4200         buf->ccontext.NameLength = cpu_to_le16(4);
4201         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4202         buf->Name[0] = 'R';
4203         buf->Name[1] = 'q';
4204         buf->Name[2] = 'L';
4205         buf->Name[3] = 's';
4206         return (char *)buf;
4207 }
4208
4209 static __u8
4210 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4211 {
4212         struct create_lease *lc = (struct create_lease *)buf;
4213
4214         *epoch = 0; /* not used */
4215         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4216                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4217         return le32_to_cpu(lc->lcontext.LeaseState);
4218 }
4219
4220 static __u8
4221 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4222 {
4223         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4224
4225         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4226         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4227                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4228         if (lease_key)
4229                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4230         return le32_to_cpu(lc->lcontext.LeaseState);
4231 }
4232
4233 static unsigned int
4234 smb2_wp_retry_size(struct inode *inode)
4235 {
4236         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4237                      SMB2_MAX_BUFFER_SIZE);
4238 }
4239
4240 static bool
4241 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4242 {
4243         return !cfile->invalidHandle;
4244 }
4245
4246 static void
4247 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4248                    struct smb_rqst *old_rq, __le16 cipher_type)
4249 {
4250         struct smb2_hdr *shdr =
4251                         (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4252
4253         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4254         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4255         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4256         tr_hdr->Flags = cpu_to_le16(0x01);
4257         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4258             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4259                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4260         else
4261                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4262         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4263 }
4264
4265 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4266                                  int num_rqst, const u8 *sig, u8 **iv,
4267                                  struct aead_request **req, struct sg_table *sgt,
4268                                  unsigned int *num_sgs, size_t *sensitive_size)
4269 {
4270         unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4271         unsigned int iv_size = crypto_aead_ivsize(tfm);
4272         unsigned int len;
4273         u8 *p;
4274
4275         *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4276         if (IS_ERR_VALUE((long)(int)*num_sgs))
4277                 return ERR_PTR(*num_sgs);
4278
4279         len = iv_size;
4280         len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4281         len = ALIGN(len, crypto_tfm_ctx_alignment());
4282         len += req_size;
4283         len = ALIGN(len, __alignof__(struct scatterlist));
4284         len += array_size(*num_sgs, sizeof(struct scatterlist));
4285         *sensitive_size = len;
4286
4287         p = kvzalloc(len, GFP_NOFS);
4288         if (!p)
4289                 return ERR_PTR(-ENOMEM);
4290
4291         *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4292         *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4293                                                 crypto_tfm_ctx_alignment());
4294         sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4295                                                    __alignof__(struct scatterlist));
4296         return p;
4297 }
4298
4299 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4300                                int num_rqst, const u8 *sig, u8 **iv,
4301                                struct aead_request **req, struct scatterlist **sgl,
4302                                size_t *sensitive_size)
4303 {
4304         struct sg_table sgtable = {};
4305         unsigned int skip, num_sgs, i, j;
4306         ssize_t rc;
4307         void *p;
4308
4309         p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4310                                 &num_sgs, sensitive_size);
4311         if (IS_ERR(p))
4312                 return ERR_CAST(p);
4313
4314         sg_init_marker(sgtable.sgl, num_sgs);
4315
4316         /*
4317          * The first rqst has a transform header where the
4318          * first 20 bytes are not part of the encrypted blob.
4319          */
4320         skip = 20;
4321
4322         for (i = 0; i < num_rqst; i++) {
4323                 struct iov_iter *iter = &rqst[i].rq_iter;
4324                 size_t count = iov_iter_count(iter);
4325
4326                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4327                         cifs_sg_set_buf(&sgtable,
4328                                         rqst[i].rq_iov[j].iov_base + skip,
4329                                         rqst[i].rq_iov[j].iov_len - skip);
4330
4331                         /* See the above comment on the 'skip' assignment */
4332                         skip = 0;
4333                 }
4334                 sgtable.orig_nents = sgtable.nents;
4335
4336                 rc = extract_iter_to_sg(iter, count, &sgtable,
4337                                         num_sgs - sgtable.nents, 0);
4338                 iov_iter_revert(iter, rc);
4339                 sgtable.orig_nents = sgtable.nents;
4340         }
4341
4342         cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4343         sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4344         *sgl = sgtable.sgl;
4345         return p;
4346 }
4347
4348 static int
4349 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4350 {
4351         struct TCP_Server_Info *pserver;
4352         struct cifs_ses *ses;
4353         u8 *ses_enc_key;
4354
4355         /* If server is a channel, select the primary channel */
4356         pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
4357
4358         spin_lock(&cifs_tcp_ses_lock);
4359         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4360                 if (ses->Suid == ses_id) {
4361                         spin_lock(&ses->ses_lock);
4362                         ses_enc_key = enc ? ses->smb3encryptionkey :
4363                                 ses->smb3decryptionkey;
4364                         memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4365                         spin_unlock(&ses->ses_lock);
4366                         spin_unlock(&cifs_tcp_ses_lock);
4367                         return 0;
4368                 }
4369         }
4370         spin_unlock(&cifs_tcp_ses_lock);
4371
4372         return -EAGAIN;
4373 }
4374 /*
4375  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4376  * iov[0]   - transform header (associate data),
4377  * iov[1-N] - SMB2 header and pages - data to encrypt.
4378  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4379  * untouched.
4380  */
4381 static int
4382 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4383               struct smb_rqst *rqst, int enc)
4384 {
4385         struct smb2_transform_hdr *tr_hdr =
4386                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4387         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4388         int rc = 0;
4389         struct scatterlist *sg;
4390         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4391         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4392         struct aead_request *req;
4393         u8 *iv;
4394         DECLARE_CRYPTO_WAIT(wait);
4395         struct crypto_aead *tfm;
4396         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4397         void *creq;
4398         size_t sensitive_size;
4399
4400         rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4401         if (rc) {
4402                 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
4403                          enc ? "en" : "de");
4404                 return rc;
4405         }
4406
4407         rc = smb3_crypto_aead_allocate(server);
4408         if (rc) {
4409                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4410                 return rc;
4411         }
4412
4413         tfm = enc ? server->secmech.enc : server->secmech.dec;
4414
4415         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4416                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4417                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4418         else
4419                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4420
4421         if (rc) {
4422                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4423                 return rc;
4424         }
4425
4426         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4427         if (rc) {
4428                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4429                 return rc;
4430         }
4431
4432         creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4433                                  &sensitive_size);
4434         if (IS_ERR(creq))
4435                 return PTR_ERR(creq);
4436
4437         if (!enc) {
4438                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4439                 crypt_len += SMB2_SIGNATURE_SIZE;
4440         }
4441
4442         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4443             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4444                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4445         else {
4446                 iv[0] = 3;
4447                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4448         }
4449
4450         aead_request_set_tfm(req, tfm);
4451         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4452         aead_request_set_ad(req, assoc_data_len);
4453
4454         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4455                                   crypto_req_done, &wait);
4456
4457         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4458                                 : crypto_aead_decrypt(req), &wait);
4459
4460         if (!rc && enc)
4461                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4462
4463         kvfree_sensitive(creq, sensitive_size);
4464         return rc;
4465 }
4466
4467 /*
4468  * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4469  */
4470 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4471 {
4472         struct folio *folio;
4473
4474         XA_STATE(xas, buffer, 0);
4475
4476         rcu_read_lock();
4477         xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4478                 folio_put(folio);
4479         }
4480         rcu_read_unlock();
4481         xa_destroy(buffer);
4482 }
4483
4484 void
4485 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4486 {
4487         int i;
4488
4489         for (i = 0; i < num_rqst; i++)
4490                 if (!xa_empty(&rqst[i].rq_buffer))
4491                         cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4492 }
4493
4494 /*
4495  * This function will initialize new_rq and encrypt the content.
4496  * The first entry, new_rq[0], only contains a single iov which contains
4497  * a smb2_transform_hdr and is pre-allocated by the caller.
4498  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4499  *
4500  * The end result is an array of smb_rqst structures where the first structure
4501  * only contains a single iov for the transform header which we then can pass
4502  * to crypt_message().
4503  *
4504  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4505  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4506  */
4507 static int
4508 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4509                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4510 {
4511         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4512         struct page *page;
4513         unsigned int orig_len = 0;
4514         int i, j;
4515         int rc = -ENOMEM;
4516
4517         for (i = 1; i < num_rqst; i++) {
4518                 struct smb_rqst *old = &old_rq[i - 1];
4519                 struct smb_rqst *new = &new_rq[i];
4520                 struct xarray *buffer = &new->rq_buffer;
4521                 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4522
4523                 orig_len += smb_rqst_len(server, old);
4524                 new->rq_iov = old->rq_iov;
4525                 new->rq_nvec = old->rq_nvec;
4526
4527                 xa_init(buffer);
4528
4529                 if (size > 0) {
4530                         unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4531
4532                         for (j = 0; j < npages; j++) {
4533                                 void *o;
4534
4535                                 rc = -ENOMEM;
4536                                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4537                                 if (!page)
4538                                         goto err_free;
4539                                 page->index = j;
4540                                 o = xa_store(buffer, j, page, GFP_KERNEL);
4541                                 if (xa_is_err(o)) {
4542                                         rc = xa_err(o);
4543                                         put_page(page);
4544                                         goto err_free;
4545                                 }
4546
4547                                 xa_set_mark(buffer, j, XA_MARK_0);
4548
4549                                 seg = min_t(size_t, size - copied, PAGE_SIZE);
4550                                 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4551                                         rc = -EFAULT;
4552                                         goto err_free;
4553                                 }
4554                                 copied += seg;
4555                         }
4556                         iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4557                                         buffer, 0, size);
4558                         new->rq_iter_size = size;
4559                 }
4560         }
4561
4562         /* fill the 1st iov with a transform header */
4563         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4564
4565         rc = crypt_message(server, num_rqst, new_rq, 1);
4566         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4567         if (rc)
4568                 goto err_free;
4569
4570         return rc;
4571
4572 err_free:
4573         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4574         return rc;
4575 }
4576
4577 static int
4578 smb3_is_transform_hdr(void *buf)
4579 {
4580         struct smb2_transform_hdr *trhdr = buf;
4581
4582         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4583 }
4584
4585 static int
4586 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4587                  unsigned int buf_data_size, struct iov_iter *iter,
4588                  bool is_offloaded)
4589 {
4590         struct kvec iov[2];
4591         struct smb_rqst rqst = {NULL};
4592         size_t iter_size = 0;
4593         int rc;
4594
4595         iov[0].iov_base = buf;
4596         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4597         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4598         iov[1].iov_len = buf_data_size;
4599
4600         rqst.rq_iov = iov;
4601         rqst.rq_nvec = 2;
4602         if (iter) {
4603                 rqst.rq_iter = *iter;
4604                 rqst.rq_iter_size = iov_iter_count(iter);
4605                 iter_size = iov_iter_count(iter);
4606         }
4607
4608         rc = crypt_message(server, 1, &rqst, 0);
4609         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4610
4611         if (rc)
4612                 return rc;
4613
4614         memmove(buf, iov[1].iov_base, buf_data_size);
4615
4616         if (!is_offloaded)
4617                 server->total_read = buf_data_size + iter_size;
4618
4619         return rc;
4620 }
4621
4622 static int
4623 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4624                         unsigned int skip, struct iov_iter *iter)
4625 {
4626         struct page *page;
4627         unsigned long index;
4628
4629         xa_for_each(pages, index, page) {
4630                 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4631
4632                 n = copy_page_to_iter(page, skip, len, iter);
4633                 if (n != len) {
4634                         cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4635                         return -EIO;
4636                 }
4637                 data_size -= n;
4638                 skip = 0;
4639         }
4640
4641         return 0;
4642 }
4643
4644 static int
4645 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4646                  char *buf, unsigned int buf_len, struct xarray *pages,
4647                  unsigned int pages_len, bool is_offloaded)
4648 {
4649         unsigned int data_offset;
4650         unsigned int data_len;
4651         unsigned int cur_off;
4652         unsigned int cur_page_idx;
4653         unsigned int pad_len;
4654         struct cifs_readdata *rdata = mid->callback_data;
4655         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4656         int length;
4657         bool use_rdma_mr = false;
4658
4659         if (shdr->Command != SMB2_READ) {
4660                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4661                 return -ENOTSUPP;
4662         }
4663
4664         if (server->ops->is_session_expired &&
4665             server->ops->is_session_expired(buf)) {
4666                 if (!is_offloaded)
4667                         cifs_reconnect(server, true);
4668                 return -1;
4669         }
4670
4671         if (server->ops->is_status_pending &&
4672                         server->ops->is_status_pending(buf, server))
4673                 return -1;
4674
4675         /* set up first two iov to get credits */
4676         rdata->iov[0].iov_base = buf;
4677         rdata->iov[0].iov_len = 0;
4678         rdata->iov[1].iov_base = buf;
4679         rdata->iov[1].iov_len =
4680                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4681         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4682                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4683         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4684                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4685
4686         rdata->result = server->ops->map_error(buf, true);
4687         if (rdata->result != 0) {
4688                 cifs_dbg(FYI, "%s: server returned error %d\n",
4689                          __func__, rdata->result);
4690                 /* normal error on read response */
4691                 if (is_offloaded)
4692                         mid->mid_state = MID_RESPONSE_RECEIVED;
4693                 else
4694                         dequeue_mid(mid, false);
4695                 return 0;
4696         }
4697
4698         data_offset = server->ops->read_data_offset(buf);
4699 #ifdef CONFIG_CIFS_SMB_DIRECT
4700         use_rdma_mr = rdata->mr;
4701 #endif
4702         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4703
4704         if (data_offset < server->vals->read_rsp_size) {
4705                 /*
4706                  * win2k8 sometimes sends an offset of 0 when the read
4707                  * is beyond the EOF. Treat it as if the data starts just after
4708                  * the header.
4709                  */
4710                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4711                          __func__, data_offset);
4712                 data_offset = server->vals->read_rsp_size;
4713         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4714                 /* data_offset is beyond the end of smallbuf */
4715                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4716                          __func__, data_offset);
4717                 rdata->result = -EIO;
4718                 if (is_offloaded)
4719                         mid->mid_state = MID_RESPONSE_MALFORMED;
4720                 else
4721                         dequeue_mid(mid, rdata->result);
4722                 return 0;
4723         }
4724
4725         pad_len = data_offset - server->vals->read_rsp_size;
4726
4727         if (buf_len <= data_offset) {
4728                 /* read response payload is in pages */
4729                 cur_page_idx = pad_len / PAGE_SIZE;
4730                 cur_off = pad_len % PAGE_SIZE;
4731
4732                 if (cur_page_idx != 0) {
4733                         /* data offset is beyond the 1st page of response */
4734                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4735                                  __func__, data_offset);
4736                         rdata->result = -EIO;
4737                         if (is_offloaded)
4738                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4739                         else
4740                                 dequeue_mid(mid, rdata->result);
4741                         return 0;
4742                 }
4743
4744                 if (data_len > pages_len - pad_len) {
4745                         /* data_len is corrupt -- discard frame */
4746                         rdata->result = -EIO;
4747                         if (is_offloaded)
4748                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4749                         else
4750                                 dequeue_mid(mid, rdata->result);
4751                         return 0;
4752                 }
4753
4754                 /* Copy the data to the output I/O iterator. */
4755                 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4756                                                         cur_off, &rdata->iter);
4757                 if (rdata->result != 0) {
4758                         if (is_offloaded)
4759                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4760                         else
4761                                 dequeue_mid(mid, rdata->result);
4762                         return 0;
4763                 }
4764                 rdata->got_bytes = pages_len;
4765
4766         } else if (buf_len >= data_offset + data_len) {
4767                 /* read response payload is in buf */
4768                 WARN_ONCE(pages && !xa_empty(pages),
4769                           "read data can be either in buf or in pages");
4770                 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4771                 if (length < 0)
4772                         return length;
4773                 rdata->got_bytes = data_len;
4774         } else {
4775                 /* read response payload cannot be in both buf and pages */
4776                 WARN_ONCE(1, "buf can not contain only a part of read data");
4777                 rdata->result = -EIO;
4778                 if (is_offloaded)
4779                         mid->mid_state = MID_RESPONSE_MALFORMED;
4780                 else
4781                         dequeue_mid(mid, rdata->result);
4782                 return 0;
4783         }
4784
4785         if (is_offloaded)
4786                 mid->mid_state = MID_RESPONSE_RECEIVED;
4787         else
4788                 dequeue_mid(mid, false);
4789         return 0;
4790 }
4791
4792 struct smb2_decrypt_work {
4793         struct work_struct decrypt;
4794         struct TCP_Server_Info *server;
4795         struct xarray buffer;
4796         char *buf;
4797         unsigned int len;
4798 };
4799
4800
4801 static void smb2_decrypt_offload(struct work_struct *work)
4802 {
4803         struct smb2_decrypt_work *dw = container_of(work,
4804                                 struct smb2_decrypt_work, decrypt);
4805         int rc;
4806         struct mid_q_entry *mid;
4807         struct iov_iter iter;
4808
4809         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4810         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4811                               &iter, true);
4812         if (rc) {
4813                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4814                 goto free_pages;
4815         }
4816
4817         dw->server->lstrp = jiffies;
4818         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4819         if (mid == NULL)
4820                 cifs_dbg(FYI, "mid not found\n");
4821         else {
4822                 mid->decrypted = true;
4823                 rc = handle_read_data(dw->server, mid, dw->buf,
4824                                       dw->server->vals->read_rsp_size,
4825                                       &dw->buffer, dw->len,
4826                                       true);
4827                 if (rc >= 0) {
4828 #ifdef CONFIG_CIFS_STATS2
4829                         mid->when_received = jiffies;
4830 #endif
4831                         if (dw->server->ops->is_network_name_deleted)
4832                                 dw->server->ops->is_network_name_deleted(dw->buf,
4833                                                                          dw->server);
4834
4835                         mid->callback(mid);
4836                 } else {
4837                         spin_lock(&dw->server->srv_lock);
4838                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4839                                 spin_lock(&dw->server->mid_lock);
4840                                 mid->mid_state = MID_RETRY_NEEDED;
4841                                 spin_unlock(&dw->server->mid_lock);
4842                                 spin_unlock(&dw->server->srv_lock);
4843                                 mid->callback(mid);
4844                         } else {
4845                                 spin_lock(&dw->server->mid_lock);
4846                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4847                                 mid->mid_flags &= ~(MID_DELETED);
4848                                 list_add_tail(&mid->qhead,
4849                                         &dw->server->pending_mid_q);
4850                                 spin_unlock(&dw->server->mid_lock);
4851                                 spin_unlock(&dw->server->srv_lock);
4852                         }
4853                 }
4854                 release_mid(mid);
4855         }
4856
4857 free_pages:
4858         cifs_clear_xarray_buffer(&dw->buffer);
4859         cifs_small_buf_release(dw->buf);
4860         kfree(dw);
4861 }
4862
4863
4864 static int
4865 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4866                        int *num_mids)
4867 {
4868         struct page *page;
4869         char *buf = server->smallbuf;
4870         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4871         struct iov_iter iter;
4872         unsigned int len, npages;
4873         unsigned int buflen = server->pdu_size;
4874         int rc;
4875         int i = 0;
4876         struct smb2_decrypt_work *dw;
4877
4878         dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4879         if (!dw)
4880                 return -ENOMEM;
4881         xa_init(&dw->buffer);
4882         INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4883         dw->server = server;
4884
4885         *num_mids = 1;
4886         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4887                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4888
4889         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4890         if (rc < 0)
4891                 goto free_dw;
4892         server->total_read += rc;
4893
4894         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4895                 server->vals->read_rsp_size;
4896         dw->len = len;
4897         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4898
4899         rc = -ENOMEM;
4900         for (; i < npages; i++) {
4901                 void *old;
4902
4903                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4904                 if (!page)
4905                         goto discard_data;
4906                 page->index = i;
4907                 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4908                 if (xa_is_err(old)) {
4909                         rc = xa_err(old);
4910                         put_page(page);
4911                         goto discard_data;
4912                 }
4913                 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4914         }
4915
4916         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4917
4918         /* Read the data into the buffer and clear excess bufferage. */
4919         rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4920         if (rc < 0)
4921                 goto discard_data;
4922
4923         server->total_read += rc;
4924         if (rc < npages * PAGE_SIZE)
4925                 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4926         iov_iter_revert(&iter, npages * PAGE_SIZE);
4927         iov_iter_truncate(&iter, dw->len);
4928
4929         rc = cifs_discard_remaining_data(server);
4930         if (rc)
4931                 goto free_pages;
4932
4933         /*
4934          * For large reads, offload to different thread for better performance,
4935          * use more cores decrypting which can be expensive
4936          */
4937
4938         if ((server->min_offload) && (server->in_flight > 1) &&
4939             (server->pdu_size >= server->min_offload)) {
4940                 dw->buf = server->smallbuf;
4941                 server->smallbuf = (char *)cifs_small_buf_get();
4942
4943                 queue_work(decrypt_wq, &dw->decrypt);
4944                 *num_mids = 0; /* worker thread takes care of finding mid */
4945                 return -1;
4946         }
4947
4948         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4949                               &iter, false);
4950         if (rc)
4951                 goto free_pages;
4952
4953         *mid = smb2_find_mid(server, buf);
4954         if (*mid == NULL) {
4955                 cifs_dbg(FYI, "mid not found\n");
4956         } else {
4957                 cifs_dbg(FYI, "mid found\n");
4958                 (*mid)->decrypted = true;
4959                 rc = handle_read_data(server, *mid, buf,
4960                                       server->vals->read_rsp_size,
4961                                       &dw->buffer, dw->len, false);
4962                 if (rc >= 0) {
4963                         if (server->ops->is_network_name_deleted) {
4964                                 server->ops->is_network_name_deleted(buf,
4965                                                                 server);
4966                         }
4967                 }
4968         }
4969
4970 free_pages:
4971         cifs_clear_xarray_buffer(&dw->buffer);
4972 free_dw:
4973         kfree(dw);
4974         return rc;
4975 discard_data:
4976         cifs_discard_remaining_data(server);
4977         goto free_pages;
4978 }
4979
4980 static int
4981 receive_encrypted_standard(struct TCP_Server_Info *server,
4982                            struct mid_q_entry **mids, char **bufs,
4983                            int *num_mids)
4984 {
4985         int ret, length;
4986         char *buf = server->smallbuf;
4987         struct smb2_hdr *shdr;
4988         unsigned int pdu_length = server->pdu_size;
4989         unsigned int buf_size;
4990         struct mid_q_entry *mid_entry;
4991         int next_is_large;
4992         char *next_buffer = NULL;
4993
4994         *num_mids = 0;
4995
4996         /* switch to large buffer if too big for a small one */
4997         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4998                 server->large_buf = true;
4999                 memcpy(server->bigbuf, buf, server->total_read);
5000                 buf = server->bigbuf;
5001         }
5002
5003         /* now read the rest */
5004         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
5005                                 pdu_length - HEADER_SIZE(server) + 1);
5006         if (length < 0)
5007                 return length;
5008         server->total_read += length;
5009
5010         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
5011         length = decrypt_raw_data(server, buf, buf_size, NULL, false);
5012         if (length)
5013                 return length;
5014
5015         next_is_large = server->large_buf;
5016 one_more:
5017         shdr = (struct smb2_hdr *)buf;
5018         if (shdr->NextCommand) {
5019                 if (next_is_large)
5020                         next_buffer = (char *)cifs_buf_get();
5021                 else
5022                         next_buffer = (char *)cifs_small_buf_get();
5023                 memcpy(next_buffer,
5024                        buf + le32_to_cpu(shdr->NextCommand),
5025                        pdu_length - le32_to_cpu(shdr->NextCommand));
5026         }
5027
5028         mid_entry = smb2_find_mid(server, buf);
5029         if (mid_entry == NULL)
5030                 cifs_dbg(FYI, "mid not found\n");
5031         else {
5032                 cifs_dbg(FYI, "mid found\n");
5033                 mid_entry->decrypted = true;
5034                 mid_entry->resp_buf_size = server->pdu_size;
5035         }
5036
5037         if (*num_mids >= MAX_COMPOUND) {
5038                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
5039                 return -1;
5040         }
5041         bufs[*num_mids] = buf;
5042         mids[(*num_mids)++] = mid_entry;
5043
5044         if (mid_entry && mid_entry->handle)
5045                 ret = mid_entry->handle(server, mid_entry);
5046         else
5047                 ret = cifs_handle_standard(server, mid_entry);
5048
5049         if (ret == 0 && shdr->NextCommand) {
5050                 pdu_length -= le32_to_cpu(shdr->NextCommand);
5051                 server->large_buf = next_is_large;
5052                 if (next_is_large)
5053                         server->bigbuf = buf = next_buffer;
5054                 else
5055                         server->smallbuf = buf = next_buffer;
5056                 goto one_more;
5057         } else if (ret != 0) {
5058                 /*
5059                  * ret != 0 here means that we didn't get to handle_mid() thus
5060                  * server->smallbuf and server->bigbuf are still valid. We need
5061                  * to free next_buffer because it is not going to be used
5062                  * anywhere.
5063                  */
5064                 if (next_is_large)
5065                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5066                 else
5067                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5068         }
5069
5070         return ret;
5071 }
5072
5073 static int
5074 smb3_receive_transform(struct TCP_Server_Info *server,
5075                        struct mid_q_entry **mids, char **bufs, int *num_mids)
5076 {
5077         char *buf = server->smallbuf;
5078         unsigned int pdu_length = server->pdu_size;
5079         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5080         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5081
5082         if (pdu_length < sizeof(struct smb2_transform_hdr) +
5083                                                 sizeof(struct smb2_hdr)) {
5084                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5085                          pdu_length);
5086                 cifs_reconnect(server, true);
5087                 return -ECONNABORTED;
5088         }
5089
5090         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5091                 cifs_server_dbg(VFS, "Transform message is broken\n");
5092                 cifs_reconnect(server, true);
5093                 return -ECONNABORTED;
5094         }
5095
5096         /* TODO: add support for compounds containing READ. */
5097         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5098                 return receive_encrypted_read(server, &mids[0], num_mids);
5099         }
5100
5101         return receive_encrypted_standard(server, mids, bufs, num_mids);
5102 }
5103
5104 int
5105 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5106 {
5107         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5108
5109         return handle_read_data(server, mid, buf, server->pdu_size,
5110                                 NULL, 0, false);
5111 }
5112
5113 static int
5114 smb2_next_header(char *buf)
5115 {
5116         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5117         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5118
5119         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5120                 return sizeof(struct smb2_transform_hdr) +
5121                   le32_to_cpu(t_hdr->OriginalMessageSize);
5122
5123         return le32_to_cpu(hdr->NextCommand);
5124 }
5125
5126 static int
5127 smb2_make_node(unsigned int xid, struct inode *inode,
5128                struct dentry *dentry, struct cifs_tcon *tcon,
5129                const char *full_path, umode_t mode, dev_t dev)
5130 {
5131         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5132         int rc = -EPERM;
5133         struct cifs_open_info_data buf = {};
5134         struct cifs_io_parms io_parms = {0};
5135         __u32 oplock = 0;
5136         struct cifs_fid fid;
5137         struct cifs_open_parms oparms;
5138         unsigned int bytes_written;
5139         struct win_dev *pdev;
5140         struct kvec iov[2];
5141
5142         /*
5143          * Check if mounted with mount parm 'sfu' mount parm.
5144          * SFU emulation should work with all servers, but only
5145          * supports block and char device (no socket & fifo),
5146          * and was used by default in earlier versions of Windows
5147          */
5148         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5149                 return rc;
5150
5151         /*
5152          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5153          * their current NFS server) uses this approach to expose special files
5154          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5155          */
5156
5157         if (!S_ISCHR(mode) && !S_ISBLK(mode))
5158                 return rc;
5159
5160         cifs_dbg(FYI, "sfu compat create special file\n");
5161
5162         oparms = (struct cifs_open_parms) {
5163                 .tcon = tcon,
5164                 .cifs_sb = cifs_sb,
5165                 .desired_access = GENERIC_WRITE,
5166                 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5167                                                       CREATE_OPTION_SPECIAL),
5168                 .disposition = FILE_CREATE,
5169                 .path = full_path,
5170                 .fid = &fid,
5171         };
5172
5173         if (tcon->ses->server->oplocks)
5174                 oplock = REQ_OPLOCK;
5175         else
5176                 oplock = 0;
5177         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf);
5178         if (rc)
5179                 return rc;
5180
5181         /*
5182          * BB Do not bother to decode buf since no local inode yet to put
5183          * timestamps in, but we can reuse it safely.
5184          */
5185
5186         pdev = (struct win_dev *)&buf.fi;
5187         io_parms.pid = current->tgid;
5188         io_parms.tcon = tcon;
5189         io_parms.offset = 0;
5190         io_parms.length = sizeof(struct win_dev);
5191         iov[1].iov_base = &buf.fi;
5192         iov[1].iov_len = sizeof(struct win_dev);
5193         if (S_ISCHR(mode)) {
5194                 memcpy(pdev->type, "IntxCHR", 8);
5195                 pdev->major = cpu_to_le64(MAJOR(dev));
5196                 pdev->minor = cpu_to_le64(MINOR(dev));
5197                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5198                                                         &bytes_written, iov, 1);
5199         } else if (S_ISBLK(mode)) {
5200                 memcpy(pdev->type, "IntxBLK", 8);
5201                 pdev->major = cpu_to_le64(MAJOR(dev));
5202                 pdev->minor = cpu_to_le64(MINOR(dev));
5203                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5204                                                         &bytes_written, iov, 1);
5205         }
5206         tcon->ses->server->ops->close(xid, tcon, &fid);
5207         d_drop(dentry);
5208
5209         /* FIXME: add code here to set EAs */
5210
5211         cifs_free_open_info(&buf);
5212         return rc;
5213 }
5214
5215 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5216 struct smb_version_operations smb20_operations = {
5217         .compare_fids = smb2_compare_fids,
5218         .setup_request = smb2_setup_request,
5219         .setup_async_request = smb2_setup_async_request,
5220         .check_receive = smb2_check_receive,
5221         .add_credits = smb2_add_credits,
5222         .set_credits = smb2_set_credits,
5223         .get_credits_field = smb2_get_credits_field,
5224         .get_credits = smb2_get_credits,
5225         .wait_mtu_credits = cifs_wait_mtu_credits,
5226         .get_next_mid = smb2_get_next_mid,
5227         .revert_current_mid = smb2_revert_current_mid,
5228         .read_data_offset = smb2_read_data_offset,
5229         .read_data_length = smb2_read_data_length,
5230         .map_error = map_smb2_to_linux_error,
5231         .find_mid = smb2_find_mid,
5232         .check_message = smb2_check_message,
5233         .dump_detail = smb2_dump_detail,
5234         .clear_stats = smb2_clear_stats,
5235         .print_stats = smb2_print_stats,
5236         .is_oplock_break = smb2_is_valid_oplock_break,
5237         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5238         .downgrade_oplock = smb2_downgrade_oplock,
5239         .need_neg = smb2_need_neg,
5240         .negotiate = smb2_negotiate,
5241         .negotiate_wsize = smb2_negotiate_wsize,
5242         .negotiate_rsize = smb2_negotiate_rsize,
5243         .sess_setup = SMB2_sess_setup,
5244         .logoff = SMB2_logoff,
5245         .tree_connect = SMB2_tcon,
5246         .tree_disconnect = SMB2_tdis,
5247         .qfs_tcon = smb2_qfs_tcon,
5248         .is_path_accessible = smb2_is_path_accessible,
5249         .can_echo = smb2_can_echo,
5250         .echo = SMB2_echo,
5251         .query_path_info = smb2_query_path_info,
5252         .get_srv_inum = smb2_get_srv_inum,
5253         .query_file_info = smb2_query_file_info,
5254         .set_path_size = smb2_set_path_size,
5255         .set_file_size = smb2_set_file_size,
5256         .set_file_info = smb2_set_file_info,
5257         .set_compression = smb2_set_compression,
5258         .mkdir = smb2_mkdir,
5259         .mkdir_setinfo = smb2_mkdir_setinfo,
5260         .rmdir = smb2_rmdir,
5261         .unlink = smb2_unlink,
5262         .rename = smb2_rename_path,
5263         .create_hardlink = smb2_create_hardlink,
5264         .query_symlink = smb2_query_symlink,
5265         .query_mf_symlink = smb3_query_mf_symlink,
5266         .create_mf_symlink = smb3_create_mf_symlink,
5267         .open = smb2_open_file,
5268         .set_fid = smb2_set_fid,
5269         .close = smb2_close_file,
5270         .flush = smb2_flush_file,
5271         .async_readv = smb2_async_readv,
5272         .async_writev = smb2_async_writev,
5273         .sync_read = smb2_sync_read,
5274         .sync_write = smb2_sync_write,
5275         .query_dir_first = smb2_query_dir_first,
5276         .query_dir_next = smb2_query_dir_next,
5277         .close_dir = smb2_close_dir,
5278         .calc_smb_size = smb2_calc_size,
5279         .is_status_pending = smb2_is_status_pending,
5280         .is_session_expired = smb2_is_session_expired,
5281         .oplock_response = smb2_oplock_response,
5282         .queryfs = smb2_queryfs,
5283         .mand_lock = smb2_mand_lock,
5284         .mand_unlock_range = smb2_unlock_range,
5285         .push_mand_locks = smb2_push_mandatory_locks,
5286         .get_lease_key = smb2_get_lease_key,
5287         .set_lease_key = smb2_set_lease_key,
5288         .new_lease_key = smb2_new_lease_key,
5289         .calc_signature = smb2_calc_signature,
5290         .is_read_op = smb2_is_read_op,
5291         .set_oplock_level = smb2_set_oplock_level,
5292         .create_lease_buf = smb2_create_lease_buf,
5293         .parse_lease_buf = smb2_parse_lease_buf,
5294         .copychunk_range = smb2_copychunk_range,
5295         .wp_retry_size = smb2_wp_retry_size,
5296         .dir_needs_close = smb2_dir_needs_close,
5297         .get_dfs_refer = smb2_get_dfs_refer,
5298         .select_sectype = smb2_select_sectype,
5299 #ifdef CONFIG_CIFS_XATTR
5300         .query_all_EAs = smb2_query_eas,
5301         .set_EA = smb2_set_ea,
5302 #endif /* CIFS_XATTR */
5303         .get_acl = get_smb2_acl,
5304         .get_acl_by_fid = get_smb2_acl_by_fid,
5305         .set_acl = set_smb2_acl,
5306         .next_header = smb2_next_header,
5307         .ioctl_query_info = smb2_ioctl_query_info,
5308         .make_node = smb2_make_node,
5309         .fiemap = smb3_fiemap,
5310         .llseek = smb3_llseek,
5311         .is_status_io_timeout = smb2_is_status_io_timeout,
5312         .is_network_name_deleted = smb2_is_network_name_deleted,
5313 };
5314 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5315
5316 struct smb_version_operations smb21_operations = {
5317         .compare_fids = smb2_compare_fids,
5318         .setup_request = smb2_setup_request,
5319         .setup_async_request = smb2_setup_async_request,
5320         .check_receive = smb2_check_receive,
5321         .add_credits = smb2_add_credits,
5322         .set_credits = smb2_set_credits,
5323         .get_credits_field = smb2_get_credits_field,
5324         .get_credits = smb2_get_credits,
5325         .wait_mtu_credits = smb2_wait_mtu_credits,
5326         .adjust_credits = smb2_adjust_credits,
5327         .get_next_mid = smb2_get_next_mid,
5328         .revert_current_mid = smb2_revert_current_mid,
5329         .read_data_offset = smb2_read_data_offset,
5330         .read_data_length = smb2_read_data_length,
5331         .map_error = map_smb2_to_linux_error,
5332         .find_mid = smb2_find_mid,
5333         .check_message = smb2_check_message,
5334         .dump_detail = smb2_dump_detail,
5335         .clear_stats = smb2_clear_stats,
5336         .print_stats = smb2_print_stats,
5337         .is_oplock_break = smb2_is_valid_oplock_break,
5338         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5339         .downgrade_oplock = smb2_downgrade_oplock,
5340         .need_neg = smb2_need_neg,
5341         .negotiate = smb2_negotiate,
5342         .negotiate_wsize = smb2_negotiate_wsize,
5343         .negotiate_rsize = smb2_negotiate_rsize,
5344         .sess_setup = SMB2_sess_setup,
5345         .logoff = SMB2_logoff,
5346         .tree_connect = SMB2_tcon,
5347         .tree_disconnect = SMB2_tdis,
5348         .qfs_tcon = smb2_qfs_tcon,
5349         .is_path_accessible = smb2_is_path_accessible,
5350         .can_echo = smb2_can_echo,
5351         .echo = SMB2_echo,
5352         .query_path_info = smb2_query_path_info,
5353         .get_srv_inum = smb2_get_srv_inum,
5354         .query_file_info = smb2_query_file_info,
5355         .set_path_size = smb2_set_path_size,
5356         .set_file_size = smb2_set_file_size,
5357         .set_file_info = smb2_set_file_info,
5358         .set_compression = smb2_set_compression,
5359         .mkdir = smb2_mkdir,
5360         .mkdir_setinfo = smb2_mkdir_setinfo,
5361         .rmdir = smb2_rmdir,
5362         .unlink = smb2_unlink,
5363         .rename = smb2_rename_path,
5364         .create_hardlink = smb2_create_hardlink,
5365         .query_symlink = smb2_query_symlink,
5366         .query_mf_symlink = smb3_query_mf_symlink,
5367         .create_mf_symlink = smb3_create_mf_symlink,
5368         .open = smb2_open_file,
5369         .set_fid = smb2_set_fid,
5370         .close = smb2_close_file,
5371         .flush = smb2_flush_file,
5372         .async_readv = smb2_async_readv,
5373         .async_writev = smb2_async_writev,
5374         .sync_read = smb2_sync_read,
5375         .sync_write = smb2_sync_write,
5376         .query_dir_first = smb2_query_dir_first,
5377         .query_dir_next = smb2_query_dir_next,
5378         .close_dir = smb2_close_dir,
5379         .calc_smb_size = smb2_calc_size,
5380         .is_status_pending = smb2_is_status_pending,
5381         .is_session_expired = smb2_is_session_expired,
5382         .oplock_response = smb2_oplock_response,
5383         .queryfs = smb2_queryfs,
5384         .mand_lock = smb2_mand_lock,
5385         .mand_unlock_range = smb2_unlock_range,
5386         .push_mand_locks = smb2_push_mandatory_locks,
5387         .get_lease_key = smb2_get_lease_key,
5388         .set_lease_key = smb2_set_lease_key,
5389         .new_lease_key = smb2_new_lease_key,
5390         .calc_signature = smb2_calc_signature,
5391         .is_read_op = smb21_is_read_op,
5392         .set_oplock_level = smb21_set_oplock_level,
5393         .create_lease_buf = smb2_create_lease_buf,
5394         .parse_lease_buf = smb2_parse_lease_buf,
5395         .copychunk_range = smb2_copychunk_range,
5396         .wp_retry_size = smb2_wp_retry_size,
5397         .dir_needs_close = smb2_dir_needs_close,
5398         .enum_snapshots = smb3_enum_snapshots,
5399         .notify = smb3_notify,
5400         .get_dfs_refer = smb2_get_dfs_refer,
5401         .select_sectype = smb2_select_sectype,
5402 #ifdef CONFIG_CIFS_XATTR
5403         .query_all_EAs = smb2_query_eas,
5404         .set_EA = smb2_set_ea,
5405 #endif /* CIFS_XATTR */
5406         .get_acl = get_smb2_acl,
5407         .get_acl_by_fid = get_smb2_acl_by_fid,
5408         .set_acl = set_smb2_acl,
5409         .next_header = smb2_next_header,
5410         .ioctl_query_info = smb2_ioctl_query_info,
5411         .make_node = smb2_make_node,
5412         .fiemap = smb3_fiemap,
5413         .llseek = smb3_llseek,
5414         .is_status_io_timeout = smb2_is_status_io_timeout,
5415         .is_network_name_deleted = smb2_is_network_name_deleted,
5416 };
5417
5418 struct smb_version_operations smb30_operations = {
5419         .compare_fids = smb2_compare_fids,
5420         .setup_request = smb2_setup_request,
5421         .setup_async_request = smb2_setup_async_request,
5422         .check_receive = smb2_check_receive,
5423         .add_credits = smb2_add_credits,
5424         .set_credits = smb2_set_credits,
5425         .get_credits_field = smb2_get_credits_field,
5426         .get_credits = smb2_get_credits,
5427         .wait_mtu_credits = smb2_wait_mtu_credits,
5428         .adjust_credits = smb2_adjust_credits,
5429         .get_next_mid = smb2_get_next_mid,
5430         .revert_current_mid = smb2_revert_current_mid,
5431         .read_data_offset = smb2_read_data_offset,
5432         .read_data_length = smb2_read_data_length,
5433         .map_error = map_smb2_to_linux_error,
5434         .find_mid = smb2_find_mid,
5435         .check_message = smb2_check_message,
5436         .dump_detail = smb2_dump_detail,
5437         .clear_stats = smb2_clear_stats,
5438         .print_stats = smb2_print_stats,
5439         .dump_share_caps = smb2_dump_share_caps,
5440         .is_oplock_break = smb2_is_valid_oplock_break,
5441         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5442         .downgrade_oplock = smb3_downgrade_oplock,
5443         .need_neg = smb2_need_neg,
5444         .negotiate = smb2_negotiate,
5445         .negotiate_wsize = smb3_negotiate_wsize,
5446         .negotiate_rsize = smb3_negotiate_rsize,
5447         .sess_setup = SMB2_sess_setup,
5448         .logoff = SMB2_logoff,
5449         .tree_connect = SMB2_tcon,
5450         .tree_disconnect = SMB2_tdis,
5451         .qfs_tcon = smb3_qfs_tcon,
5452         .is_path_accessible = smb2_is_path_accessible,
5453         .can_echo = smb2_can_echo,
5454         .echo = SMB2_echo,
5455         .query_path_info = smb2_query_path_info,
5456         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5457         .query_reparse_tag = smb2_query_reparse_tag,
5458         .get_srv_inum = smb2_get_srv_inum,
5459         .query_file_info = smb2_query_file_info,
5460         .set_path_size = smb2_set_path_size,
5461         .set_file_size = smb2_set_file_size,
5462         .set_file_info = smb2_set_file_info,
5463         .set_compression = smb2_set_compression,
5464         .mkdir = smb2_mkdir,
5465         .mkdir_setinfo = smb2_mkdir_setinfo,
5466         .rmdir = smb2_rmdir,
5467         .unlink = smb2_unlink,
5468         .rename = smb2_rename_path,
5469         .create_hardlink = smb2_create_hardlink,
5470         .query_symlink = smb2_query_symlink,
5471         .query_mf_symlink = smb3_query_mf_symlink,
5472         .create_mf_symlink = smb3_create_mf_symlink,
5473         .open = smb2_open_file,
5474         .set_fid = smb2_set_fid,
5475         .close = smb2_close_file,
5476         .close_getattr = smb2_close_getattr,
5477         .flush = smb2_flush_file,
5478         .async_readv = smb2_async_readv,
5479         .async_writev = smb2_async_writev,
5480         .sync_read = smb2_sync_read,
5481         .sync_write = smb2_sync_write,
5482         .query_dir_first = smb2_query_dir_first,
5483         .query_dir_next = smb2_query_dir_next,
5484         .close_dir = smb2_close_dir,
5485         .calc_smb_size = smb2_calc_size,
5486         .is_status_pending = smb2_is_status_pending,
5487         .is_session_expired = smb2_is_session_expired,
5488         .oplock_response = smb2_oplock_response,
5489         .queryfs = smb2_queryfs,
5490         .mand_lock = smb2_mand_lock,
5491         .mand_unlock_range = smb2_unlock_range,
5492         .push_mand_locks = smb2_push_mandatory_locks,
5493         .get_lease_key = smb2_get_lease_key,
5494         .set_lease_key = smb2_set_lease_key,
5495         .new_lease_key = smb2_new_lease_key,
5496         .generate_signingkey = generate_smb30signingkey,
5497         .calc_signature = smb3_calc_signature,
5498         .set_integrity  = smb3_set_integrity,
5499         .is_read_op = smb21_is_read_op,
5500         .set_oplock_level = smb3_set_oplock_level,
5501         .create_lease_buf = smb3_create_lease_buf,
5502         .parse_lease_buf = smb3_parse_lease_buf,
5503         .copychunk_range = smb2_copychunk_range,
5504         .duplicate_extents = smb2_duplicate_extents,
5505         .validate_negotiate = smb3_validate_negotiate,
5506         .wp_retry_size = smb2_wp_retry_size,
5507         .dir_needs_close = smb2_dir_needs_close,
5508         .fallocate = smb3_fallocate,
5509         .enum_snapshots = smb3_enum_snapshots,
5510         .notify = smb3_notify,
5511         .init_transform_rq = smb3_init_transform_rq,
5512         .is_transform_hdr = smb3_is_transform_hdr,
5513         .receive_transform = smb3_receive_transform,
5514         .get_dfs_refer = smb2_get_dfs_refer,
5515         .select_sectype = smb2_select_sectype,
5516 #ifdef CONFIG_CIFS_XATTR
5517         .query_all_EAs = smb2_query_eas,
5518         .set_EA = smb2_set_ea,
5519 #endif /* CIFS_XATTR */
5520         .get_acl = get_smb2_acl,
5521         .get_acl_by_fid = get_smb2_acl_by_fid,
5522         .set_acl = set_smb2_acl,
5523         .next_header = smb2_next_header,
5524         .ioctl_query_info = smb2_ioctl_query_info,
5525         .make_node = smb2_make_node,
5526         .fiemap = smb3_fiemap,
5527         .llseek = smb3_llseek,
5528         .is_status_io_timeout = smb2_is_status_io_timeout,
5529         .is_network_name_deleted = smb2_is_network_name_deleted,
5530 };
5531
5532 struct smb_version_operations smb311_operations = {
5533         .compare_fids = smb2_compare_fids,
5534         .setup_request = smb2_setup_request,
5535         .setup_async_request = smb2_setup_async_request,
5536         .check_receive = smb2_check_receive,
5537         .add_credits = smb2_add_credits,
5538         .set_credits = smb2_set_credits,
5539         .get_credits_field = smb2_get_credits_field,
5540         .get_credits = smb2_get_credits,
5541         .wait_mtu_credits = smb2_wait_mtu_credits,
5542         .adjust_credits = smb2_adjust_credits,
5543         .get_next_mid = smb2_get_next_mid,
5544         .revert_current_mid = smb2_revert_current_mid,
5545         .read_data_offset = smb2_read_data_offset,
5546         .read_data_length = smb2_read_data_length,
5547         .map_error = map_smb2_to_linux_error,
5548         .find_mid = smb2_find_mid,
5549         .check_message = smb2_check_message,
5550         .dump_detail = smb2_dump_detail,
5551         .clear_stats = smb2_clear_stats,
5552         .print_stats = smb2_print_stats,
5553         .dump_share_caps = smb2_dump_share_caps,
5554         .is_oplock_break = smb2_is_valid_oplock_break,
5555         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5556         .downgrade_oplock = smb3_downgrade_oplock,
5557         .need_neg = smb2_need_neg,
5558         .negotiate = smb2_negotiate,
5559         .negotiate_wsize = smb3_negotiate_wsize,
5560         .negotiate_rsize = smb3_negotiate_rsize,
5561         .sess_setup = SMB2_sess_setup,
5562         .logoff = SMB2_logoff,
5563         .tree_connect = SMB2_tcon,
5564         .tree_disconnect = SMB2_tdis,
5565         .qfs_tcon = smb3_qfs_tcon,
5566         .is_path_accessible = smb2_is_path_accessible,
5567         .can_echo = smb2_can_echo,
5568         .echo = SMB2_echo,
5569         .query_path_info = smb2_query_path_info,
5570         .query_reparse_tag = smb2_query_reparse_tag,
5571         .get_srv_inum = smb2_get_srv_inum,
5572         .query_file_info = smb2_query_file_info,
5573         .set_path_size = smb2_set_path_size,
5574         .set_file_size = smb2_set_file_size,
5575         .set_file_info = smb2_set_file_info,
5576         .set_compression = smb2_set_compression,
5577         .mkdir = smb2_mkdir,
5578         .mkdir_setinfo = smb2_mkdir_setinfo,
5579         .posix_mkdir = smb311_posix_mkdir,
5580         .rmdir = smb2_rmdir,
5581         .unlink = smb2_unlink,
5582         .rename = smb2_rename_path,
5583         .create_hardlink = smb2_create_hardlink,
5584         .query_symlink = smb2_query_symlink,
5585         .query_mf_symlink = smb3_query_mf_symlink,
5586         .create_mf_symlink = smb3_create_mf_symlink,
5587         .open = smb2_open_file,
5588         .set_fid = smb2_set_fid,
5589         .close = smb2_close_file,
5590         .close_getattr = smb2_close_getattr,
5591         .flush = smb2_flush_file,
5592         .async_readv = smb2_async_readv,
5593         .async_writev = smb2_async_writev,
5594         .sync_read = smb2_sync_read,
5595         .sync_write = smb2_sync_write,
5596         .query_dir_first = smb2_query_dir_first,
5597         .query_dir_next = smb2_query_dir_next,
5598         .close_dir = smb2_close_dir,
5599         .calc_smb_size = smb2_calc_size,
5600         .is_status_pending = smb2_is_status_pending,
5601         .is_session_expired = smb2_is_session_expired,
5602         .oplock_response = smb2_oplock_response,
5603         .queryfs = smb311_queryfs,
5604         .mand_lock = smb2_mand_lock,
5605         .mand_unlock_range = smb2_unlock_range,
5606         .push_mand_locks = smb2_push_mandatory_locks,
5607         .get_lease_key = smb2_get_lease_key,
5608         .set_lease_key = smb2_set_lease_key,
5609         .new_lease_key = smb2_new_lease_key,
5610         .generate_signingkey = generate_smb311signingkey,
5611         .calc_signature = smb3_calc_signature,
5612         .set_integrity  = smb3_set_integrity,
5613         .is_read_op = smb21_is_read_op,
5614         .set_oplock_level = smb3_set_oplock_level,
5615         .create_lease_buf = smb3_create_lease_buf,
5616         .parse_lease_buf = smb3_parse_lease_buf,
5617         .copychunk_range = smb2_copychunk_range,
5618         .duplicate_extents = smb2_duplicate_extents,
5619 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5620         .wp_retry_size = smb2_wp_retry_size,
5621         .dir_needs_close = smb2_dir_needs_close,
5622         .fallocate = smb3_fallocate,
5623         .enum_snapshots = smb3_enum_snapshots,
5624         .notify = smb3_notify,
5625         .init_transform_rq = smb3_init_transform_rq,
5626         .is_transform_hdr = smb3_is_transform_hdr,
5627         .receive_transform = smb3_receive_transform,
5628         .get_dfs_refer = smb2_get_dfs_refer,
5629         .select_sectype = smb2_select_sectype,
5630 #ifdef CONFIG_CIFS_XATTR
5631         .query_all_EAs = smb2_query_eas,
5632         .set_EA = smb2_set_ea,
5633 #endif /* CIFS_XATTR */
5634         .get_acl = get_smb2_acl,
5635         .get_acl_by_fid = get_smb2_acl_by_fid,
5636         .set_acl = set_smb2_acl,
5637         .next_header = smb2_next_header,
5638         .ioctl_query_info = smb2_ioctl_query_info,
5639         .make_node = smb2_make_node,
5640         .fiemap = smb3_fiemap,
5641         .llseek = smb3_llseek,
5642         .is_status_io_timeout = smb2_is_status_io_timeout,
5643         .is_network_name_deleted = smb2_is_network_name_deleted,
5644 };
5645
5646 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5647 struct smb_version_values smb20_values = {
5648         .version_string = SMB20_VERSION_STRING,
5649         .protocol_id = SMB20_PROT_ID,
5650         .req_capabilities = 0, /* MBZ */
5651         .large_lock_type = 0,
5652         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5653         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5654         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5655         .header_size = sizeof(struct smb2_hdr),
5656         .header_preamble_size = 0,
5657         .max_header_size = MAX_SMB2_HDR_SIZE,
5658         .read_rsp_size = sizeof(struct smb2_read_rsp),
5659         .lock_cmd = SMB2_LOCK,
5660         .cap_unix = 0,
5661         .cap_nt_find = SMB2_NT_FIND,
5662         .cap_large_files = SMB2_LARGE_FILES,
5663         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5664         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5665         .create_lease_size = sizeof(struct create_lease),
5666 };
5667 #endif /* ALLOW_INSECURE_LEGACY */
5668
5669 struct smb_version_values smb21_values = {
5670         .version_string = SMB21_VERSION_STRING,
5671         .protocol_id = SMB21_PROT_ID,
5672         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5673         .large_lock_type = 0,
5674         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5675         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5676         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5677         .header_size = sizeof(struct smb2_hdr),
5678         .header_preamble_size = 0,
5679         .max_header_size = MAX_SMB2_HDR_SIZE,
5680         .read_rsp_size = sizeof(struct smb2_read_rsp),
5681         .lock_cmd = SMB2_LOCK,
5682         .cap_unix = 0,
5683         .cap_nt_find = SMB2_NT_FIND,
5684         .cap_large_files = SMB2_LARGE_FILES,
5685         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5686         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5687         .create_lease_size = sizeof(struct create_lease),
5688 };
5689
5690 struct smb_version_values smb3any_values = {
5691         .version_string = SMB3ANY_VERSION_STRING,
5692         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5693         .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,
5694         .large_lock_type = 0,
5695         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5696         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5697         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5698         .header_size = sizeof(struct smb2_hdr),
5699         .header_preamble_size = 0,
5700         .max_header_size = MAX_SMB2_HDR_SIZE,
5701         .read_rsp_size = sizeof(struct smb2_read_rsp),
5702         .lock_cmd = SMB2_LOCK,
5703         .cap_unix = 0,
5704         .cap_nt_find = SMB2_NT_FIND,
5705         .cap_large_files = SMB2_LARGE_FILES,
5706         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5707         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5708         .create_lease_size = sizeof(struct create_lease_v2),
5709 };
5710
5711 struct smb_version_values smbdefault_values = {
5712         .version_string = SMBDEFAULT_VERSION_STRING,
5713         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5714         .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,
5715         .large_lock_type = 0,
5716         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5717         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5718         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5719         .header_size = sizeof(struct smb2_hdr),
5720         .header_preamble_size = 0,
5721         .max_header_size = MAX_SMB2_HDR_SIZE,
5722         .read_rsp_size = sizeof(struct smb2_read_rsp),
5723         .lock_cmd = SMB2_LOCK,
5724         .cap_unix = 0,
5725         .cap_nt_find = SMB2_NT_FIND,
5726         .cap_large_files = SMB2_LARGE_FILES,
5727         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5728         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5729         .create_lease_size = sizeof(struct create_lease_v2),
5730 };
5731
5732 struct smb_version_values smb30_values = {
5733         .version_string = SMB30_VERSION_STRING,
5734         .protocol_id = SMB30_PROT_ID,
5735         .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,
5736         .large_lock_type = 0,
5737         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5738         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5739         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5740         .header_size = sizeof(struct smb2_hdr),
5741         .header_preamble_size = 0,
5742         .max_header_size = MAX_SMB2_HDR_SIZE,
5743         .read_rsp_size = sizeof(struct smb2_read_rsp),
5744         .lock_cmd = SMB2_LOCK,
5745         .cap_unix = 0,
5746         .cap_nt_find = SMB2_NT_FIND,
5747         .cap_large_files = SMB2_LARGE_FILES,
5748         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5749         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5750         .create_lease_size = sizeof(struct create_lease_v2),
5751 };
5752
5753 struct smb_version_values smb302_values = {
5754         .version_string = SMB302_VERSION_STRING,
5755         .protocol_id = SMB302_PROT_ID,
5756         .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,
5757         .large_lock_type = 0,
5758         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5759         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5760         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5761         .header_size = sizeof(struct smb2_hdr),
5762         .header_preamble_size = 0,
5763         .max_header_size = MAX_SMB2_HDR_SIZE,
5764         .read_rsp_size = sizeof(struct smb2_read_rsp),
5765         .lock_cmd = SMB2_LOCK,
5766         .cap_unix = 0,
5767         .cap_nt_find = SMB2_NT_FIND,
5768         .cap_large_files = SMB2_LARGE_FILES,
5769         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5770         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5771         .create_lease_size = sizeof(struct create_lease_v2),
5772 };
5773
5774 struct smb_version_values smb311_values = {
5775         .version_string = SMB311_VERSION_STRING,
5776         .protocol_id = SMB311_PROT_ID,
5777         .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,
5778         .large_lock_type = 0,
5779         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5780         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5781         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5782         .header_size = sizeof(struct smb2_hdr),
5783         .header_preamble_size = 0,
5784         .max_header_size = MAX_SMB2_HDR_SIZE,
5785         .read_rsp_size = sizeof(struct smb2_read_rsp),
5786         .lock_cmd = SMB2_LOCK,
5787         .cap_unix = 0,
5788         .cap_nt_find = SMB2_NT_FIND,
5789         .cap_large_files = SMB2_LARGE_FILES,
5790         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5791         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5792         .create_lease_size = sizeof(struct create_lease_v2),
5793 };