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         if (server->credits > server->max_credits)
  38                 server->credits = server->max_credits;
  39         server->oplock_credits = server->echo_credits = 0;
  40         switch (server->credits) {
  41         case 0:
  42                 return 0;
  43         case 1:
  44                 server->echoes = false;
  45                 server->oplocks = false;
  46                 break;
  47         case 2:
  48                 server->echoes = true;
  49                 server->oplocks = false;
  50                 server->echo_credits = 1;
  51                 break;
  52         default:
  53                 server->echoes = true;
  54                 if (enable_oplocks) {
  55                         server->oplocks = true;
  56                         server->oplock_credits = 1;
  57                 } else
  58                         server->oplocks = false;
  59
  60                 server->echo_credits = 1;
  61         }
  62         server->credits -= server->echo_credits + server->oplock_credits;
  63         return server->credits + server->echo_credits + server->oplock_credits;
  64 }
  65
  66 static void
  67 smb2_add_credits(struct TCP_Server_Info *server,
  68                  const struct cifs_credits *credits, const int optype)
  69 {
  70         int *val, rc = -1;
  71         int scredits, in_flight;
  72         unsigned int add = credits->value;
  73         unsigned int instance = credits->instance;
  74         bool reconnect_detected = false;
  75         bool reconnect_with_invalid_credits = false;
  76
  77         spin_lock(&server->req_lock);
  78         val = server->ops->get_credits_field(server, optype);
  79
  80         /* eg found case where write overlapping reconnect messed up credits */
  81         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  82                 reconnect_with_invalid_credits = true;
  83
  84         if ((instance == 0) || (instance == server->reconnect_instance))
  85                 *val += add;
  86         else
  87                 reconnect_detected = true;
  88
  89         if (*val > 65000) {
  90                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  91                 pr_warn_once("server overflowed SMB3 credits\n");
  92                 trace_smb3_overflow_credits(server->CurrentMid,
  93                                             server->conn_id, server->hostname, *val,
  94                                             add, server->in_flight);
  95         }
  96         WARN_ON_ONCE(server->in_flight == 0);
  97         server->in_flight--;
  98         if (server->in_flight == 0 &&
  99            ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
 100            ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
 101                 rc = change_conf(server);
 102         /*
 103          * Sometimes server returns 0 credits on oplock break ack - we need to
 104          * rebalance credits in this case.
 105          */
 106         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
 107                  server->oplocks) {
 108                 if (server->credits > 1) {
 109                         server->credits--;
 110                         server->oplock_credits++;
 111                 }
 112         } else if ((server->in_flight > 0) && (server->oplock_credits > 3) &&
 113                    ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP))
 114                 /* if now have too many oplock credits, rebalance so don't starve normal ops */
 115                 change_conf(server);
 116
 117         scredits = *val;
 118         in_flight = server->in_flight;
 119         spin_unlock(&server->req_lock);
 120         wake_up(&server->request_q);
 121
 122         if (reconnect_detected) {
 123                 trace_smb3_reconnect_detected(server->CurrentMid,
 124                         server->conn_id, server->hostname, scredits, add, in_flight);
 125
 126                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 127                          add, instance);
 128         }
 129
 130         if (reconnect_with_invalid_credits) {
 131                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
 132                         server->conn_id, server->hostname, scredits, add, in_flight);
 133                 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
 134                          optype, scredits, add);
 135         }
 136
 137         spin_lock(&server->srv_lock);
 138         if (server->tcpStatus == CifsNeedReconnect
 139             || server->tcpStatus == CifsExiting) {
 140                 spin_unlock(&server->srv_lock);
 141                 return;
 142         }
 143         spin_unlock(&server->srv_lock);
 144
 145         switch (rc) {
 146         case -1:
 147                 /* change_conf hasn't been executed */
 148                 break;
 149         case 0:
 150                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 151                 break;
 152         case 1:
 153                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 154                 break;
 155         case 2:
 156                 cifs_dbg(FYI, "disabling oplocks\n");
 157                 break;
 158         default:
 159                 /* change_conf rebalanced credits for different types */
 160                 break;
 161         }
 162
 163         trace_smb3_add_credits(server->CurrentMid,
 164                         server->conn_id, server->hostname, scredits, add, in_flight);
 165         cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
 166 }
 167
 168 static void
 169 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 170 {
 171         int scredits, in_flight;
 172
 173         spin_lock(&server->req_lock);
 174         server->credits = val;
 175         if (val == 1) {
 176                 server->reconnect_instance++;
 177                 /*
 178                  * ChannelSequence updated for all channels in primary channel so that consistent
 179                  * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1
 180                  */
 181                 if (SERVER_IS_CHAN(server))
 182                         server->primary_server->channel_sequence_num++;
 183                 else
 184                         server->channel_sequence_num++;
 185         }
 186         scredits = server->credits;
 187         in_flight = server->in_flight;
 188         spin_unlock(&server->req_lock);
 189
 190         trace_smb3_set_credits(server->CurrentMid,
 191                         server->conn_id, server->hostname, scredits, val, in_flight);
 192         cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
 193
 194         /* don't log while holding the lock */
 195         if (val == 1)
 196                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 197 }
 198
 199 static int *
 200 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 201 {
 202         switch (optype) {
 203         case CIFS_ECHO_OP:
 204                 return &server->echo_credits;
 205         case CIFS_OBREAK_OP:
 206                 return &server->oplock_credits;
 207         default:
 208                 return &server->credits;
 209         }
 210 }
 211
 212 static unsigned int
 213 smb2_get_credits(struct mid_q_entry *mid)
 214 {
 215         return mid->credits_received;
 216 }
 217
 218 static int
 219 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 220                       unsigned int *num, struct cifs_credits *credits)
 221 {
 222         int rc = 0;
 223         unsigned int scredits, in_flight;
 224
 225         spin_lock(&server->req_lock);
 226         while (1) {
 227                 spin_unlock(&server->req_lock);
 228
 229                 spin_lock(&server->srv_lock);
 230                 if (server->tcpStatus == CifsExiting) {
 231                         spin_unlock(&server->srv_lock);
 232                         return -ENOENT;
 233                 }
 234                 spin_unlock(&server->srv_lock);
 235
 236                 spin_lock(&server->req_lock);
 237                 if (server->credits <= 0) {
 238                         spin_unlock(&server->req_lock);
 239                         cifs_num_waiters_inc(server);
 240                         rc = wait_event_killable(server->request_q,
 241                                 has_credits(server, &server->credits, 1));
 242                         cifs_num_waiters_dec(server);
 243                         if (rc)
 244                                 return rc;
 245                         spin_lock(&server->req_lock);
 246                 } else {
 247                         scredits = server->credits;
 248                         /* can deadlock with reopen */
 249                         if (scredits <= 8) {
 250                                 *num = SMB2_MAX_BUFFER_SIZE;
 251                                 credits->value = 0;
 252                                 credits->instance = 0;
 253                                 break;
 254                         }
 255
 256                         /* leave some credits for reopen and other ops */
 257                         scredits -= 8;
 258                         *num = min_t(unsigned int, size,
 259                                      scredits * SMB2_MAX_BUFFER_SIZE);
 260
 261                         credits->value =
 262                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 263                         credits->instance = server->reconnect_instance;
 264                         server->credits -= credits->value;
 265                         server->in_flight++;
 266                         if (server->in_flight > server->max_in_flight)
 267                                 server->max_in_flight = server->in_flight;
 268                         break;
 269                 }
 270         }
 271         scredits = server->credits;
 272         in_flight = server->in_flight;
 273         spin_unlock(&server->req_lock);
 274
 275         trace_smb3_wait_credits(server->CurrentMid,
 276                         server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
 277         cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
 278                         __func__, credits->value, scredits);
 279
 280         return rc;
 281 }
 282
 283 static int
 284 smb2_adjust_credits(struct TCP_Server_Info *server,
 285                     struct cifs_credits *credits,
 286                     const unsigned int payload_size)
 287 {
 288         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 289         int scredits, in_flight;
 290
 291         if (!credits->value || credits->value == new_val)
 292                 return 0;
 293
 294         if (credits->value < new_val) {
 295                 trace_smb3_too_many_credits(server->CurrentMid,
 296                                 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
 297                 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
 298                                 credits->value, new_val);
 299
 300                 return -EOPNOTSUPP;
 301         }
 302
 303         spin_lock(&server->req_lock);
 304
 305         if (server->reconnect_instance != credits->instance) {
 306                 scredits = server->credits;
 307                 in_flight = server->in_flight;
 308                 spin_unlock(&server->req_lock);
 309
 310                 trace_smb3_reconnect_detected(server->CurrentMid,
 311                         server->conn_id, server->hostname, scredits,
 312                         credits->value - new_val, in_flight);
 313                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 314                          credits->value - new_val);
 315                 return -EAGAIN;
 316         }
 317
 318         server->credits += credits->value - new_val;
 319         scredits = server->credits;
 320         in_flight = server->in_flight;
 321         spin_unlock(&server->req_lock);
 322         wake_up(&server->request_q);
 323
 324         trace_smb3_adj_credits(server->CurrentMid,
 325                         server->conn_id, server->hostname, scredits,
 326                         credits->value - new_val, in_flight);
 327         cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
 328                         __func__, credits->value - new_val, scredits);
 329
 330         credits->value = new_val;
 331
 332         return 0;
 333 }
 334
 335 static __u64
 336 smb2_get_next_mid(struct TCP_Server_Info *server)
 337 {
 338         __u64 mid;
 339         /* for SMB2 we need the current value */
 340         spin_lock(&server->mid_lock);
 341         mid = server->CurrentMid++;
 342         spin_unlock(&server->mid_lock);
 343         return mid;
 344 }
 345
 346 static void
 347 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 348 {
 349         spin_lock(&server->mid_lock);
 350         if (server->CurrentMid >= val)
 351                 server->CurrentMid -= val;
 352         spin_unlock(&server->mid_lock);
 353 }
 354
 355 static struct mid_q_entry *
 356 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 357 {
 358         struct mid_q_entry *mid;
 359         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 360         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 361
 362         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 363                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 364                 return NULL;
 365         }
 366
 367         spin_lock(&server->mid_lock);
 368         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 369                 if ((mid->mid == wire_mid) &&
 370                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 371                     (mid->command == shdr->Command)) {
 372                         kref_get(&mid->refcount);
 373                         if (dequeue) {
 374                                 list_del_init(&mid->qhead);
 375                                 mid->mid_flags |= MID_DELETED;
 376                         }
 377                         spin_unlock(&server->mid_lock);
 378                         return mid;
 379                 }
 380         }
 381         spin_unlock(&server->mid_lock);
 382         return NULL;
 383 }
 384
 385 static struct mid_q_entry *
 386 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 387 {
 388         return __smb2_find_mid(server, buf, false);
 389 }
 390
 391 static struct mid_q_entry *
 392 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
 393 {
 394         return __smb2_find_mid(server, buf, true);
 395 }
 396
 397 static void
 398 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 399 {
 400 #ifdef CONFIG_CIFS_DEBUG2
 401         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 402
 403         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 404                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 405                  shdr->Id.SyncId.ProcessId);
 406         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 407                  server->ops->calc_smb_size(buf));
 408 #endif
 409 }
 410
 411 static bool
 412 smb2_need_neg(struct TCP_Server_Info *server)
 413 {
 414         return server->max_read == 0;
 415 }
 416
 417 static int
 418 smb2_negotiate(const unsigned int xid,
 419                struct cifs_ses *ses,
 420                struct TCP_Server_Info *server)
 421 {
 422         int rc;
 423
 424         spin_lock(&server->mid_lock);
 425         server->CurrentMid = 0;
 426         spin_unlock(&server->mid_lock);
 427         rc = SMB2_negotiate(xid, ses, server);
 428         /* BB we probably don't need to retry with modern servers */
 429         if (rc == -EAGAIN)
 430                 rc = -EHOSTDOWN;
 431         return rc;
 432 }
 433
 434 static unsigned int
 435 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 436 {
 437         struct TCP_Server_Info *server = tcon->ses->server;
 438         unsigned int wsize;
 439
 440         /* start with specified wsize, or default */
 441         wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
 442         wsize = min_t(unsigned int, wsize, server->max_write);
 443         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 444                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 445
 446         return wsize;
 447 }
 448
 449 static unsigned int
 450 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 451 {
 452         struct TCP_Server_Info *server = tcon->ses->server;
 453         unsigned int wsize;
 454
 455         /* start with specified wsize, or default */
 456         wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
 457         wsize = min_t(unsigned int, wsize, server->max_write);
 458 #ifdef CONFIG_CIFS_SMB_DIRECT
 459         if (server->rdma) {
 460                 if (server->sign)
 461                         /*
 462                          * Account for SMB2 data transfer packet header and
 463                          * possible encryption header
 464                          */
 465                         wsize = min_t(unsigned int,
 466                                 wsize,
 467                                 server->smbd_conn->max_fragmented_send_size -
 468                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 469                                         sizeof(struct smb2_transform_hdr));
 470                 else
 471                         wsize = min_t(unsigned int,
 472                                 wsize, server->smbd_conn->max_readwrite_size);
 473         }
 474 #endif
 475         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 476                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 477
 478         return wsize;
 479 }
 480
 481 static unsigned int
 482 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 483 {
 484         struct TCP_Server_Info *server = tcon->ses->server;
 485         unsigned int rsize;
 486
 487         /* start with specified rsize, or default */
 488         rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
 489         rsize = min_t(unsigned int, rsize, server->max_read);
 490
 491         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 492                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 493
 494         return rsize;
 495 }
 496
 497 static unsigned int
 498 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 499 {
 500         struct TCP_Server_Info *server = tcon->ses->server;
 501         unsigned int rsize;
 502
 503         /* start with specified rsize, or default */
 504         rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
 505         rsize = min_t(unsigned int, rsize, server->max_read);
 506 #ifdef CONFIG_CIFS_SMB_DIRECT
 507         if (server->rdma) {
 508                 if (server->sign)
 509                         /*
 510                          * Account for SMB2 data transfer packet header and
 511                          * possible encryption header
 512                          */
 513                         rsize = min_t(unsigned int,
 514                                 rsize,
 515                                 server->smbd_conn->max_fragmented_recv_size -
 516                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 517                                         sizeof(struct smb2_transform_hdr));
 518                 else
 519                         rsize = min_t(unsigned int,
 520                                 rsize, server->smbd_conn->max_readwrite_size);
 521         }
 522 #endif
 523
 524         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 525                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 526
 527         return rsize;
 528 }
 529
 530 /*
 531  * compare two interfaces a and b
 532  * return 0 if everything matches.
 533  * return 1 if a is rdma capable, or rss capable, or has higher link speed
 534  * return -1 otherwise.
 535  */
 536 static int
 537 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
 538 {
 539         int cmp_ret = 0;
 540
 541         WARN_ON(!a || !b);
 542         if (a->rdma_capable == b->rdma_capable) {
 543                 if (a->rss_capable == b->rss_capable) {
 544                         if (a->speed == b->speed) {
 545                                 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr,
 546                                                           (struct sockaddr *) &b->sockaddr);
 547                                 if (!cmp_ret)
 548                                         return 0;
 549                                 else if (cmp_ret > 0)
 550                                         return 1;
 551                                 else
 552                                         return -1;
 553                         } else if (a->speed > b->speed)
 554                                 return 1;
 555                         else
 556                                 return -1;
 557                 } else if (a->rss_capable > b->rss_capable)
 558                         return 1;
 559                 else
 560                         return -1;
 561         } else if (a->rdma_capable > b->rdma_capable)
 562                 return 1;
 563         else
 564                 return -1;
 565 }
 566
 567 static int
 568 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 569                         size_t buf_len, struct cifs_ses *ses, bool in_mount)
 570 {
 571         struct network_interface_info_ioctl_rsp *p;
 572         struct sockaddr_in *addr4;
 573         struct sockaddr_in6 *addr6;
 574         struct iface_info_ipv4 *p4;
 575         struct iface_info_ipv6 *p6;
 576         struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
 577         struct cifs_server_iface tmp_iface;
 578         ssize_t bytes_left;
 579         size_t next = 0;
 580         int nb_iface = 0;
 581         int rc = 0, ret = 0;
 582
 583         bytes_left = buf_len;
 584         p = buf;
 585
 586         spin_lock(&ses->iface_lock);
 587         /* do not query too frequently, this time with lock held */
 588         if (ses->iface_last_update &&
 589             time_before(jiffies, ses->iface_last_update +
 590                         (SMB_INTERFACE_POLL_INTERVAL * HZ))) {
 591                 spin_unlock(&ses->iface_lock);
 592                 return 0;
 593         }
 594
 595         /*
 596          * Go through iface_list and do kref_put to remove
 597          * any unused ifaces. ifaces in use will be removed
 598          * when the last user calls a kref_put on it
 599          */
 600         list_for_each_entry_safe(iface, niface, &ses->iface_list,
 601                                  iface_head) {
 602                 iface->is_active = 0;
 603                 kref_put(&iface->refcount, release_iface);
 604                 ses->iface_count--;
 605         }
 606         spin_unlock(&ses->iface_lock);
 607
 608         /*
 609          * Samba server e.g. can return an empty interface list in some cases,
 610          * which would only be a problem if we were requesting multichannel
 611          */
 612         if (bytes_left == 0) {
 613                 /* avoid spamming logs every 10 minutes, so log only in mount */
 614                 if ((ses->chan_max > 1) && in_mount)
 615                         cifs_dbg(VFS,
 616                                  "multichannel not available\n"
 617                                  "Empty network interface list returned by server %s\n",
 618                                  ses->server->hostname);
 619                 rc = -EINVAL;
 620                 goto out;
 621         }
 622
 623         while (bytes_left >= sizeof(*p)) {
 624                 memset(&tmp_iface, 0, sizeof(tmp_iface));
 625                 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
 626                 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 627                 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 628
 629                 switch (p->Family) {
 630                 /*
 631                  * The kernel and wire socket structures have the same
 632                  * layout and use network byte order but make the
 633                  * conversion explicit in case either one changes.
 634                  */
 635                 case INTERNETWORK:
 636                         addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
 637                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 638                         addr4->sin_family = AF_INET;
 639                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 640
 641                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 642                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 643
 644                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 645                                  &addr4->sin_addr);
 646                         break;
 647                 case INTERNETWORKV6:
 648                         addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
 649                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 650                         addr6->sin6_family = AF_INET6;
 651                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 652
 653                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 654                         addr6->sin6_flowinfo = 0;
 655                         addr6->sin6_scope_id = 0;
 656                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 657
 658                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 659                                  &addr6->sin6_addr);
 660                         break;
 661                 default:
 662                         cifs_dbg(VFS,
 663                                  "%s: skipping unsupported socket family\n",
 664                                  __func__);
 665                         goto next_iface;
 666                 }
 667
 668                 /*
 669                  * The iface_list is assumed to be sorted by speed.
 670                  * Check if the new interface exists in that list.
 671                  * NEVER change iface. it could be in use.
 672                  * Add a new one instead
 673                  */
 674                 spin_lock(&ses->iface_lock);
 675                 list_for_each_entry_safe(iface, niface, &ses->iface_list,
 676                                          iface_head) {
 677                         ret = iface_cmp(iface, &tmp_iface);
 678                         if (!ret) {
 679                                 /* just get a ref so that it doesn't get picked/freed */
 680                                 iface->is_active = 1;
 681                                 kref_get(&iface->refcount);
 682                                 ses->iface_count++;
 683                                 spin_unlock(&ses->iface_lock);
 684                                 goto next_iface;
 685                         } else if (ret < 0) {
 686                                 /* all remaining ifaces are slower */
 687                                 kref_get(&iface->refcount);
 688                                 break;
 689                         }
 690                 }
 691                 spin_unlock(&ses->iface_lock);
 692
 693                 /* no match. insert the entry in the list */
 694                 info = kmalloc(sizeof(struct cifs_server_iface),
 695                                GFP_KERNEL);
 696                 if (!info) {
 697                         rc = -ENOMEM;
 698                         goto out;
 699                 }
 700                 memcpy(info, &tmp_iface, sizeof(tmp_iface));
 701
 702                 /* add this new entry to the list */
 703                 kref_init(&info->refcount);
 704                 info->is_active = 1;
 705
 706                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
 707                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 708                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 709                          le32_to_cpu(p->Capability));
 710
 711                 spin_lock(&ses->iface_lock);
 712                 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
 713                         list_add_tail(&info->iface_head, &iface->iface_head);
 714                         kref_put(&iface->refcount, release_iface);
 715                 } else
 716                         list_add_tail(&info->iface_head, &ses->iface_list);
 717
 718                 ses->iface_count++;
 719                 spin_unlock(&ses->iface_lock);
 720                 ses->iface_last_update = jiffies;
 721 next_iface:
 722                 nb_iface++;
 723                 next = le32_to_cpu(p->Next);
 724                 if (!next) {
 725                         bytes_left -= sizeof(*p);
 726                         break;
 727                 }
 728                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 729                 bytes_left -= next;
 730         }
 731
 732         if (!nb_iface) {
 733                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 734                 rc = -EINVAL;
 735                 goto out;
 736         }
 737
 738         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 739         if ((bytes_left > 8) || p->Next)
 740                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 741
 742
 743         if (!ses->iface_count) {
 744                 rc = -EINVAL;
 745                 goto out;
 746         }
 747
 748 out:
 749         return rc;
 750 }
 751
 752 int
 753 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
 754 {
 755         int rc;
 756         unsigned int ret_data_len = 0;
 757         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 758         struct cifs_ses *ses = tcon->ses;
 759
 760         /* do not query too frequently */
 761         if (ses->iface_last_update &&
 762             time_before(jiffies, ses->iface_last_update +
 763                         (SMB_INTERFACE_POLL_INTERVAL * HZ)))
 764                 return 0;
 765
 766         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 767                         FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 768                         NULL /* no data input */, 0 /* no data input */,
 769                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 770         if (rc == -EOPNOTSUPP) {
 771                 cifs_dbg(FYI,
 772                          "server does not support query network interfaces\n");
 773                 ret_data_len = 0;
 774         } else if (rc != 0) {
 775                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 776                 goto out;
 777         }
 778
 779         rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
 780         if (rc)
 781                 goto out;
 782
 783 out:
 784         kfree(out_buf);
 785         return rc;
 786 }
 787
 788 static void
 789 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 790               struct cifs_sb_info *cifs_sb)
 791 {
 792         int rc;
 793         __le16 srch_path = 0; /* Null - open root of share */
 794         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 795         struct cifs_open_parms oparms;
 796         struct cifs_fid fid;
 797         struct cached_fid *cfid = NULL;
 798
 799         oparms = (struct cifs_open_parms) {
 800                 .tcon = tcon,
 801                 .path = "",
 802                 .desired_access = FILE_READ_ATTRIBUTES,
 803                 .disposition = FILE_OPEN,
 804                 .create_options = cifs_create_options(cifs_sb, 0),
 805                 .fid = &fid,
 806         };
 807
 808         rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
 809         if (rc == 0)
 810                 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
 811         else
 812                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 813                                NULL, NULL);
 814         if (rc)
 815                 return;
 816
 817         SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
 818
 819         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 820                         FS_ATTRIBUTE_INFORMATION);
 821         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 822                         FS_DEVICE_INFORMATION);
 823         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 824                         FS_VOLUME_INFORMATION);
 825         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 826                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 827         if (cfid == NULL)
 828                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 829         else
 830                 close_cached_dir(cfid);
 831 }
 832
 833 static void
 834 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 835               struct cifs_sb_info *cifs_sb)
 836 {
 837         int rc;
 838         __le16 srch_path = 0; /* Null - open root of share */
 839         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 840         struct cifs_open_parms oparms;
 841         struct cifs_fid fid;
 842
 843         oparms = (struct cifs_open_parms) {
 844                 .tcon = tcon,
 845                 .path = "",
 846                 .desired_access = FILE_READ_ATTRIBUTES,
 847                 .disposition = FILE_OPEN,
 848                 .create_options = cifs_create_options(cifs_sb, 0),
 849                 .fid = &fid,
 850         };
 851
 852         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 853                        NULL, NULL);
 854         if (rc)
 855                 return;
 856
 857         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 858                         FS_ATTRIBUTE_INFORMATION);
 859         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 860                         FS_DEVICE_INFORMATION);
 861         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 862 }
 863
 864 static int
 865 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 866                         struct cifs_sb_info *cifs_sb, const char *full_path)
 867 {
 868         __le16 *utf16_path;
 869         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 870         int err_buftype = CIFS_NO_BUFFER;
 871         struct cifs_open_parms oparms;
 872         struct kvec err_iov = {};
 873         struct cifs_fid fid;
 874         struct cached_fid *cfid;
 875         bool islink;
 876         int rc, rc2;
 877
 878         rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
 879         if (!rc) {
 880                 if (cfid->has_lease) {
 881                         close_cached_dir(cfid);
 882                         return 0;
 883                 }
 884                 close_cached_dir(cfid);
 885         }
 886
 887         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 888         if (!utf16_path)
 889                 return -ENOMEM;
 890
 891         oparms = (struct cifs_open_parms) {
 892                 .tcon = tcon,
 893                 .path = full_path,
 894                 .desired_access = FILE_READ_ATTRIBUTES,
 895                 .disposition = FILE_OPEN,
 896                 .create_options = cifs_create_options(cifs_sb, 0),
 897                 .fid = &fid,
 898         };
 899
 900         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
 901                        &err_iov, &err_buftype);
 902         if (rc) {
 903                 struct smb2_hdr *hdr = err_iov.iov_base;
 904
 905                 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
 906                         goto out;
 907
 908                 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
 909                         rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 910                                                              full_path, &islink);
 911                         if (rc2) {
 912                                 rc = rc2;
 913                                 goto out;
 914                         }
 915                         if (islink)
 916                                 rc = -EREMOTE;
 917                 }
 918                 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
 919                     (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
 920                         rc = -EOPNOTSUPP;
 921                 goto out;
 922         }
 923
 924         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 925
 926 out:
 927         free_rsp_buf(err_buftype, err_iov.iov_base);
 928         kfree(utf16_path);
 929         return rc;
 930 }
 931
 932 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 933                              struct cifs_sb_info *cifs_sb, const char *full_path,
 934                              u64 *uniqueid, struct cifs_open_info_data *data)
 935 {
 936         *uniqueid = le64_to_cpu(data->fi.IndexNumber);
 937         return 0;
 938 }
 939
 940 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 941                                 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
 942 {
 943         struct cifs_fid *fid = &cfile->fid;
 944
 945         if (cfile->symlink_target) {
 946                 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 947                 if (!data->symlink_target)
 948                         return -ENOMEM;
 949         }
 950         return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
 951 }
 952
 953 #ifdef CONFIG_CIFS_XATTR
 954 static ssize_t
 955 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 956                      struct smb2_file_full_ea_info *src, size_t src_size,
 957                      const unsigned char *ea_name)
 958 {
 959         int rc = 0;
 960         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 961         char *name, *value;
 962         size_t buf_size = dst_size;
 963         size_t name_len, value_len, user_name_len;
 964
 965         while (src_size > 0) {
 966                 name_len = (size_t)src->ea_name_length;
 967                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 968
 969                 if (name_len == 0)
 970                         break;
 971
 972                 if (src_size < 8 + name_len + 1 + value_len) {
 973                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 974                         rc = -EIO;
 975                         goto out;
 976                 }
 977
 978                 name = &src->ea_data[0];
 979                 value = &src->ea_data[src->ea_name_length + 1];
 980
 981                 if (ea_name) {
 982                         if (ea_name_len == name_len &&
 983                             memcmp(ea_name, name, name_len) == 0) {
 984                                 rc = value_len;
 985                                 if (dst_size == 0)
 986                                         goto out;
 987                                 if (dst_size < value_len) {
 988                                         rc = -ERANGE;
 989                                         goto out;
 990                                 }
 991                                 memcpy(dst, value, value_len);
 992                                 goto out;
 993                         }
 994                 } else {
 995                         /* 'user.' plus a terminating null */
 996                         user_name_len = 5 + 1 + name_len;
 997
 998                         if (buf_size == 0) {
 999                                 /* skip copy - calc size only */
1000                                 rc += user_name_len;
1001                         } else if (dst_size >= user_name_len) {
1002                                 dst_size -= user_name_len;
1003                                 memcpy(dst, "user.", 5);
1004                                 dst += 5;
1005                                 memcpy(dst, src->ea_data, name_len);
1006                                 dst += name_len;
1007                                 *dst = 0;
1008                                 ++dst;
1009                                 rc += user_name_len;
1010                         } else {
1011                                 /* stop before overrun buffer */
1012                                 rc = -ERANGE;
1013                                 break;
1014                         }
1015                 }
1016
1017                 if (!src->next_entry_offset)
1018                         break;
1019
1020                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1021                         /* stop before overrun buffer */
1022                         rc = -ERANGE;
1023                         break;
1024                 }
1025                 src_size -= le32_to_cpu(src->next_entry_offset);
1026                 src = (void *)((char *)src +
1027                                le32_to_cpu(src->next_entry_offset));
1028         }
1029
1030         /* didn't find the named attribute */
1031         if (ea_name)
1032                 rc = -ENODATA;
1033
1034 out:
1035         return (ssize_t)rc;
1036 }
1037
1038 static ssize_t
1039 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1040                const unsigned char *path, const unsigned char *ea_name,
1041                char *ea_data, size_t buf_size,
1042                struct cifs_sb_info *cifs_sb)
1043 {
1044         int rc;
1045         struct kvec rsp_iov = {NULL, 0};
1046         int buftype = CIFS_NO_BUFFER;
1047         struct smb2_query_info_rsp *rsp;
1048         struct smb2_file_full_ea_info *info = NULL;
1049
1050         rc = smb2_query_info_compound(xid, tcon, path,
1051                                       FILE_READ_EA,
1052                                       FILE_FULL_EA_INFORMATION,
1053                                       SMB2_O_INFO_FILE,
1054                                       CIFSMaxBufSize -
1055                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1056                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1057                                       &rsp_iov, &buftype, cifs_sb);
1058         if (rc) {
1059                 /*
1060                  * If ea_name is NULL (listxattr) and there are no EAs,
1061                  * return 0 as it's not an error. Otherwise, the specified
1062                  * ea_name was not found.
1063                  */
1064                 if (!ea_name && rc == -ENODATA)
1065                         rc = 0;
1066                 goto qeas_exit;
1067         }
1068
1069         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1070         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1071                                le32_to_cpu(rsp->OutputBufferLength),
1072                                &rsp_iov,
1073                                sizeof(struct smb2_file_full_ea_info));
1074         if (rc)
1075                 goto qeas_exit;
1076
1077         info = (struct smb2_file_full_ea_info *)(
1078                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1079         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1080                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1081
1082  qeas_exit:
1083         free_rsp_buf(buftype, rsp_iov.iov_base);
1084         return rc;
1085 }
1086
1087 static int
1088 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1089             const char *path, const char *ea_name, const void *ea_value,
1090             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1091             struct cifs_sb_info *cifs_sb)
1092 {
1093         struct smb2_compound_vars *vars;
1094         struct cifs_ses *ses = tcon->ses;
1095         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1096         struct smb_rqst *rqst;
1097         struct kvec *rsp_iov;
1098         __le16 *utf16_path = NULL;
1099         int ea_name_len = strlen(ea_name);
1100         int flags = CIFS_CP_CREATE_CLOSE_OP;
1101         int len;
1102         int resp_buftype[3];
1103         struct cifs_open_parms oparms;
1104         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1105         struct cifs_fid fid;
1106         unsigned int size[1];
1107         void *data[1];
1108         struct smb2_file_full_ea_info *ea = NULL;
1109         struct smb2_query_info_rsp *rsp;
1110         int rc, used_len = 0;
1111
1112         if (smb3_encryption_required(tcon))
1113                 flags |= CIFS_TRANSFORM_REQ;
1114
1115         if (ea_name_len > 255)
1116                 return -EINVAL;
1117
1118         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1119         if (!utf16_path)
1120                 return -ENOMEM;
1121
1122         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1123         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
1124         if (!vars) {
1125                 rc = -ENOMEM;
1126                 goto out_free_path;
1127         }
1128         rqst = vars->rqst;
1129         rsp_iov = vars->rsp_iov;
1130
1131         if (ses->server->ops->query_all_EAs) {
1132                 if (!ea_value) {
1133                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1134                                                              ea_name, NULL, 0,
1135                                                              cifs_sb);
1136                         if (rc == -ENODATA)
1137                                 goto sea_exit;
1138                 } else {
1139                         /* If we are adding a attribute we should first check
1140                          * if there will be enough space available to store
1141                          * the new EA. If not we should not add it since we
1142                          * would not be able to even read the EAs back.
1143                          */
1144                         rc = smb2_query_info_compound(xid, tcon, path,
1145                                       FILE_READ_EA,
1146                                       FILE_FULL_EA_INFORMATION,
1147                                       SMB2_O_INFO_FILE,
1148                                       CIFSMaxBufSize -
1149                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1150                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1151                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1152                         if (rc == 0) {
1153                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1154                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1155                         }
1156                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1157                         resp_buftype[1] = CIFS_NO_BUFFER;
1158                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1159                         rc = 0;
1160
1161                         /* Use a fudge factor of 256 bytes in case we collide
1162                          * with a different set_EAs command.
1163                          */
1164                         if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1165                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1166                            used_len + ea_name_len + ea_value_len + 1) {
1167                                 rc = -ENOSPC;
1168                                 goto sea_exit;
1169                         }
1170                 }
1171         }
1172
1173         /* Open */
1174         rqst[0].rq_iov = vars->open_iov;
1175         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1176
1177         oparms = (struct cifs_open_parms) {
1178                 .tcon = tcon,
1179                 .path = path,
1180                 .desired_access = FILE_WRITE_EA,
1181                 .disposition = FILE_OPEN,
1182                 .create_options = cifs_create_options(cifs_sb, 0),
1183                 .fid = &fid,
1184         };
1185
1186         rc = SMB2_open_init(tcon, server,
1187                             &rqst[0], &oplock, &oparms, utf16_path);
1188         if (rc)
1189                 goto sea_exit;
1190         smb2_set_next_command(tcon, &rqst[0]);
1191
1192
1193         /* Set Info */
1194         rqst[1].rq_iov = vars->si_iov;
1195         rqst[1].rq_nvec = 1;
1196
1197         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1198         ea = kzalloc(len, GFP_KERNEL);
1199         if (ea == NULL) {
1200                 rc = -ENOMEM;
1201                 goto sea_exit;
1202         }
1203
1204         ea->ea_name_length = ea_name_len;
1205         ea->ea_value_length = cpu_to_le16(ea_value_len);
1206         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1207         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1208
1209         size[0] = len;
1210         data[0] = ea;
1211
1212         rc = SMB2_set_info_init(tcon, server,
1213                                 &rqst[1], COMPOUND_FID,
1214                                 COMPOUND_FID, current->tgid,
1215                                 FILE_FULL_EA_INFORMATION,
1216                                 SMB2_O_INFO_FILE, 0, data, size);
1217         if (rc)
1218                 goto sea_exit;
1219         smb2_set_next_command(tcon, &rqst[1]);
1220         smb2_set_related(&rqst[1]);
1221
1222         /* Close */
1223         rqst[2].rq_iov = &vars->close_iov;
1224         rqst[2].rq_nvec = 1;
1225         rc = SMB2_close_init(tcon, server,
1226                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1227         if (rc)
1228                 goto sea_exit;
1229         smb2_set_related(&rqst[2]);
1230
1231         rc = compound_send_recv(xid, ses, server,
1232                                 flags, 3, rqst,
1233                                 resp_buftype, rsp_iov);
1234         /* no need to bump num_remote_opens because handle immediately closed */
1235
1236  sea_exit:
1237         kfree(ea);
1238         SMB2_open_free(&rqst[0]);
1239         SMB2_set_info_free(&rqst[1]);
1240         SMB2_close_free(&rqst[2]);
1241         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1242         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1243         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1244         kfree(vars);
1245 out_free_path:
1246         kfree(utf16_path);
1247         return rc;
1248 }
1249 #endif
1250
1251 static bool
1252 smb2_can_echo(struct TCP_Server_Info *server)
1253 {
1254         return server->echoes;
1255 }
1256
1257 static void
1258 smb2_clear_stats(struct cifs_tcon *tcon)
1259 {
1260         int i;
1261
1262         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1263                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1264                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1265         }
1266 }
1267
1268 static void
1269 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1270 {
1271         seq_puts(m, "\n\tShare Capabilities:");
1272         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1273                 seq_puts(m, " DFS,");
1274         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1275                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1276         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1277                 seq_puts(m, " SCALEOUT,");
1278         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1279                 seq_puts(m, " CLUSTER,");
1280         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1281                 seq_puts(m, " ASYMMETRIC,");
1282         if (tcon->capabilities == 0)
1283                 seq_puts(m, " None");
1284         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1285                 seq_puts(m, " Aligned,");
1286         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1287                 seq_puts(m, " Partition Aligned,");
1288         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1289                 seq_puts(m, " SSD,");
1290         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1291                 seq_puts(m, " TRIM-support,");
1292
1293         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1294         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1295         if (tcon->perf_sector_size)
1296                 seq_printf(m, "\tOptimal sector size: 0x%x",
1297                            tcon->perf_sector_size);
1298         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1299 }
1300
1301 static void
1302 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1303 {
1304         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1305         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1306
1307         /*
1308          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1309          *  totals (requests sent) since those SMBs are per-session not per tcon
1310          */
1311         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1312                    (long long)(tcon->bytes_read),
1313                    (long long)(tcon->bytes_written));
1314         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1315                    atomic_read(&tcon->num_local_opens),
1316                    atomic_read(&tcon->num_remote_opens));
1317         seq_printf(m, "\nTreeConnects: %d total %d failed",
1318                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1319                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1320         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1321                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1322                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1323         seq_printf(m, "\nCreates: %d total %d failed",
1324                    atomic_read(&sent[SMB2_CREATE_HE]),
1325                    atomic_read(&failed[SMB2_CREATE_HE]));
1326         seq_printf(m, "\nCloses: %d total %d failed",
1327                    atomic_read(&sent[SMB2_CLOSE_HE]),
1328                    atomic_read(&failed[SMB2_CLOSE_HE]));
1329         seq_printf(m, "\nFlushes: %d total %d failed",
1330                    atomic_read(&sent[SMB2_FLUSH_HE]),
1331                    atomic_read(&failed[SMB2_FLUSH_HE]));
1332         seq_printf(m, "\nReads: %d total %d failed",
1333                    atomic_read(&sent[SMB2_READ_HE]),
1334                    atomic_read(&failed[SMB2_READ_HE]));
1335         seq_printf(m, "\nWrites: %d total %d failed",
1336                    atomic_read(&sent[SMB2_WRITE_HE]),
1337                    atomic_read(&failed[SMB2_WRITE_HE]));
1338         seq_printf(m, "\nLocks: %d total %d failed",
1339                    atomic_read(&sent[SMB2_LOCK_HE]),
1340                    atomic_read(&failed[SMB2_LOCK_HE]));
1341         seq_printf(m, "\nIOCTLs: %d total %d failed",
1342                    atomic_read(&sent[SMB2_IOCTL_HE]),
1343                    atomic_read(&failed[SMB2_IOCTL_HE]));
1344         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1345                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1346                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1347         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1348                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1349                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1350         seq_printf(m, "\nQueryInfos: %d total %d failed",
1351                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1352                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1353         seq_printf(m, "\nSetInfos: %d total %d failed",
1354                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1355                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1356         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1357                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1358                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1359 }
1360
1361 static void
1362 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1363 {
1364         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1365         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1366
1367         cfile->fid.persistent_fid = fid->persistent_fid;
1368         cfile->fid.volatile_fid = fid->volatile_fid;
1369         cfile->fid.access = fid->access;
1370 #ifdef CONFIG_CIFS_DEBUG2
1371         cfile->fid.mid = fid->mid;
1372 #endif /* CIFS_DEBUG2 */
1373         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1374                                       &fid->purge_cache);
1375         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1376         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1377 }
1378
1379 static void
1380 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1381                 struct cifs_fid *fid)
1382 {
1383         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1384 }
1385
1386 static void
1387 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1388                    struct cifsFileInfo *cfile)
1389 {
1390         struct smb2_file_network_open_info file_inf;
1391         struct inode *inode;
1392         int rc;
1393
1394         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1395                    cfile->fid.volatile_fid, &file_inf);
1396         if (rc)
1397                 return;
1398
1399         inode = d_inode(cfile->dentry);
1400
1401         spin_lock(&inode->i_lock);
1402         CIFS_I(inode)->time = jiffies;
1403
1404         /* Creation time should not need to be updated on close */
1405         if (file_inf.LastWriteTime)
1406                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1407         if (file_inf.ChangeTime)
1408                 inode_set_ctime_to_ts(inode,
1409                                       cifs_NTtimeToUnix(file_inf.ChangeTime));
1410         if (file_inf.LastAccessTime)
1411                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1412
1413         /*
1414          * i_blocks is not related to (i_size / i_blksize),
1415          * but instead 512 byte (2**9) size is required for
1416          * calculating num blocks.
1417          */
1418         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1419                 inode->i_blocks =
1420                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1421
1422         /* End of file and Attributes should not have to be updated on close */
1423         spin_unlock(&inode->i_lock);
1424 }
1425
1426 static int
1427 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1428                      u64 persistent_fid, u64 volatile_fid,
1429                      struct copychunk_ioctl *pcchunk)
1430 {
1431         int rc;
1432         unsigned int ret_data_len;
1433         struct resume_key_req *res_key;
1434
1435         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1436                         FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1437                         CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1438
1439         if (rc == -EOPNOTSUPP) {
1440                 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1441                 goto req_res_key_exit;
1442         } else if (rc) {
1443                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1444                 goto req_res_key_exit;
1445         }
1446         if (ret_data_len < sizeof(struct resume_key_req)) {
1447                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1448                 rc = -EINVAL;
1449                 goto req_res_key_exit;
1450         }
1451         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1452
1453 req_res_key_exit:
1454         kfree(res_key);
1455         return rc;
1456 }
1457
1458 static int
1459 smb2_ioctl_query_info(const unsigned int xid,
1460                       struct cifs_tcon *tcon,
1461                       struct cifs_sb_info *cifs_sb,
1462                       __le16 *path, int is_dir,
1463                       unsigned long p)
1464 {
1465         struct smb2_compound_vars *vars;
1466         struct smb_rqst *rqst;
1467         struct kvec *rsp_iov;
1468         struct cifs_ses *ses = tcon->ses;
1469         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1470         char __user *arg = (char __user *)p;
1471         struct smb_query_info qi;
1472         struct smb_query_info __user *pqi;
1473         int rc = 0;
1474         int flags = CIFS_CP_CREATE_CLOSE_OP;
1475         struct smb2_query_info_rsp *qi_rsp = NULL;
1476         struct smb2_ioctl_rsp *io_rsp = NULL;
1477         void *buffer = NULL;
1478         int resp_buftype[3];
1479         struct cifs_open_parms oparms;
1480         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1481         struct cifs_fid fid;
1482         unsigned int size[2];
1483         void *data[2];
1484         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1485         void (*free_req1_func)(struct smb_rqst *r);
1486
1487         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1488         if (vars == NULL)
1489                 return -ENOMEM;
1490         rqst = &vars->rqst[0];
1491         rsp_iov = &vars->rsp_iov[0];
1492
1493         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1494
1495         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1496                 rc = -EFAULT;
1497                 goto free_vars;
1498         }
1499         if (qi.output_buffer_length > 1024) {
1500                 rc = -EINVAL;
1501                 goto free_vars;
1502         }
1503
1504         if (!ses || !server) {
1505                 rc = -EIO;
1506                 goto free_vars;
1507         }
1508
1509         if (smb3_encryption_required(tcon))
1510                 flags |= CIFS_TRANSFORM_REQ;
1511
1512         if (qi.output_buffer_length) {
1513                 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1514                 if (IS_ERR(buffer)) {
1515                         rc = PTR_ERR(buffer);
1516                         goto free_vars;
1517                 }
1518         }
1519
1520         /* Open */
1521         rqst[0].rq_iov = &vars->open_iov[0];
1522         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1523
1524         oparms = (struct cifs_open_parms) {
1525                 .tcon = tcon,
1526                 .disposition = FILE_OPEN,
1527                 .create_options = cifs_create_options(cifs_sb, create_options),
1528                 .fid = &fid,
1529         };
1530
1531         if (qi.flags & PASSTHRU_FSCTL) {
1532                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1533                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1534                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1535                         break;
1536                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1537                         oparms.desired_access = GENERIC_ALL;
1538                         break;
1539                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1540                         oparms.desired_access = GENERIC_READ;
1541                         break;
1542                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1543                         oparms.desired_access = GENERIC_WRITE;
1544                         break;
1545                 }
1546         } else if (qi.flags & PASSTHRU_SET_INFO) {
1547                 oparms.desired_access = GENERIC_WRITE;
1548         } else {
1549                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1550         }
1551
1552         rc = SMB2_open_init(tcon, server,
1553                             &rqst[0], &oplock, &oparms, path);
1554         if (rc)
1555                 goto free_output_buffer;
1556         smb2_set_next_command(tcon, &rqst[0]);
1557
1558         /* Query */
1559         if (qi.flags & PASSTHRU_FSCTL) {
1560                 /* Can eventually relax perm check since server enforces too */
1561                 if (!capable(CAP_SYS_ADMIN)) {
1562                         rc = -EPERM;
1563                         goto free_open_req;
1564                 }
1565                 rqst[1].rq_iov = &vars->io_iov[0];
1566                 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1567
1568                 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1569                                      qi.info_type, buffer, qi.output_buffer_length,
1570                                      CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1571                                      MAX_SMB2_CLOSE_RESPONSE_SIZE);
1572                 free_req1_func = SMB2_ioctl_free;
1573         } else if (qi.flags == PASSTHRU_SET_INFO) {
1574                 /* Can eventually relax perm check since server enforces too */
1575                 if (!capable(CAP_SYS_ADMIN)) {
1576                         rc = -EPERM;
1577                         goto free_open_req;
1578                 }
1579                 if (qi.output_buffer_length < 8) {
1580                         rc = -EINVAL;
1581                         goto free_open_req;
1582                 }
1583                 rqst[1].rq_iov = vars->si_iov;
1584                 rqst[1].rq_nvec = 1;
1585
1586                 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1587                 size[0] = 8;
1588                 data[0] = buffer;
1589
1590                 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1591                                         current->tgid, FILE_END_OF_FILE_INFORMATION,
1592                                         SMB2_O_INFO_FILE, 0, data, size);
1593                 free_req1_func = SMB2_set_info_free;
1594         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1595                 rqst[1].rq_iov = &vars->qi_iov;
1596                 rqst[1].rq_nvec = 1;
1597
1598                 rc = SMB2_query_info_init(tcon, server,
1599                                   &rqst[1], COMPOUND_FID,
1600                                   COMPOUND_FID, qi.file_info_class,
1601                                   qi.info_type, qi.additional_information,
1602                                   qi.input_buffer_length,
1603                                   qi.output_buffer_length, buffer);
1604                 free_req1_func = SMB2_query_info_free;
1605         } else { /* unknown flags */
1606                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1607                               qi.flags);
1608                 rc = -EINVAL;
1609         }
1610
1611         if (rc)
1612                 goto free_open_req;
1613         smb2_set_next_command(tcon, &rqst[1]);
1614         smb2_set_related(&rqst[1]);
1615
1616         /* Close */
1617         rqst[2].rq_iov = &vars->close_iov;
1618         rqst[2].rq_nvec = 1;
1619
1620         rc = SMB2_close_init(tcon, server,
1621                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1622         if (rc)
1623                 goto free_req_1;
1624         smb2_set_related(&rqst[2]);
1625
1626         rc = compound_send_recv(xid, ses, server,
1627                                 flags, 3, rqst,
1628                                 resp_buftype, rsp_iov);
1629         if (rc)
1630                 goto out;
1631
1632         /* No need to bump num_remote_opens since handle immediately closed */
1633         if (qi.flags & PASSTHRU_FSCTL) {
1634                 pqi = (struct smb_query_info __user *)arg;
1635                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1636                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1637                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1638                 if (qi.input_buffer_length > 0 &&
1639                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1640                     > rsp_iov[1].iov_len) {
1641                         rc = -EFAULT;
1642                         goto out;
1643                 }
1644
1645                 if (copy_to_user(&pqi->input_buffer_length,
1646                                  &qi.input_buffer_length,
1647                                  sizeof(qi.input_buffer_length))) {
1648                         rc = -EFAULT;
1649                         goto out;
1650                 }
1651
1652                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1653                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1654                                  qi.input_buffer_length))
1655                         rc = -EFAULT;
1656         } else {
1657                 pqi = (struct smb_query_info __user *)arg;
1658                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1659                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1660                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1661                 if (copy_to_user(&pqi->input_buffer_length,
1662                                  &qi.input_buffer_length,
1663                                  sizeof(qi.input_buffer_length))) {
1664                         rc = -EFAULT;
1665                         goto out;
1666                 }
1667
1668                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1669                                  qi.input_buffer_length))
1670                         rc = -EFAULT;
1671         }
1672
1673 out:
1674         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1675         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1676         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1677         SMB2_close_free(&rqst[2]);
1678 free_req_1:
1679         free_req1_func(&rqst[1]);
1680 free_open_req:
1681         SMB2_open_free(&rqst[0]);
1682 free_output_buffer:
1683         kfree(buffer);
1684 free_vars:
1685         kfree(vars);
1686         return rc;
1687 }
1688
1689 static ssize_t
1690 smb2_copychunk_range(const unsigned int xid,
1691                         struct cifsFileInfo *srcfile,
1692                         struct cifsFileInfo *trgtfile, u64 src_off,
1693                         u64 len, u64 dest_off)
1694 {
1695         int rc;
1696         unsigned int ret_data_len;
1697         struct copychunk_ioctl *pcchunk;
1698         struct copychunk_ioctl_rsp *retbuf = NULL;
1699         struct cifs_tcon *tcon;
1700         int chunks_copied = 0;
1701         bool chunk_sizes_updated = false;
1702         ssize_t bytes_written, total_bytes_written = 0;
1703
1704         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1705         if (pcchunk == NULL)
1706                 return -ENOMEM;
1707
1708         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1709         /* Request a key from the server to identify the source of the copy */
1710         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1711                                 srcfile->fid.persistent_fid,
1712                                 srcfile->fid.volatile_fid, pcchunk);
1713
1714         /* Note: request_res_key sets res_key null only if rc !=0 */
1715         if (rc)
1716                 goto cchunk_out;
1717
1718         /* For now array only one chunk long, will make more flexible later */
1719         pcchunk->ChunkCount = cpu_to_le32(1);
1720         pcchunk->Reserved = 0;
1721         pcchunk->Reserved2 = 0;
1722
1723         tcon = tlink_tcon(trgtfile->tlink);
1724
1725         while (len > 0) {
1726                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1727                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1728                 pcchunk->Length =
1729                         cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1730
1731                 /* Request server copy to target from src identified by key */
1732                 kfree(retbuf);
1733                 retbuf = NULL;
1734                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1735                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1736                         (char *)pcchunk, sizeof(struct copychunk_ioctl),
1737                         CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1738                 if (rc == 0) {
1739                         if (ret_data_len !=
1740                                         sizeof(struct copychunk_ioctl_rsp)) {
1741                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1742                                 rc = -EIO;
1743                                 goto cchunk_out;
1744                         }
1745                         if (retbuf->TotalBytesWritten == 0) {
1746                                 cifs_dbg(FYI, "no bytes copied\n");
1747                                 rc = -EIO;
1748                                 goto cchunk_out;
1749                         }
1750                         /*
1751                          * Check if server claimed to write more than we asked
1752                          */
1753                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1754                             le32_to_cpu(pcchunk->Length)) {
1755                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1756                                 rc = -EIO;
1757                                 goto cchunk_out;
1758                         }
1759                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1760                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1761                                 rc = -EIO;
1762                                 goto cchunk_out;
1763                         }
1764                         chunks_copied++;
1765
1766                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1767                         src_off += bytes_written;
1768                         dest_off += bytes_written;
1769                         len -= bytes_written;
1770                         total_bytes_written += bytes_written;
1771
1772                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1773                                 le32_to_cpu(retbuf->ChunksWritten),
1774                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1775                                 bytes_written);
1776                 } else if (rc == -EINVAL) {
1777                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1778                                 goto cchunk_out;
1779
1780                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1781                                 le32_to_cpu(retbuf->ChunksWritten),
1782                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1783                                 le32_to_cpu(retbuf->TotalBytesWritten));
1784
1785                         /*
1786                          * Check if this is the first request using these sizes,
1787                          * (ie check if copy succeed once with original sizes
1788                          * and check if the server gave us different sizes after
1789                          * we already updated max sizes on previous request).
1790                          * if not then why is the server returning an error now
1791                          */
1792                         if ((chunks_copied != 0) || chunk_sizes_updated)
1793                                 goto cchunk_out;
1794
1795                         /* Check that server is not asking us to grow size */
1796                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1797                                         tcon->max_bytes_chunk)
1798                                 tcon->max_bytes_chunk =
1799                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1800                         else
1801                                 goto cchunk_out; /* server gave us bogus size */
1802
1803                         /* No need to change MaxChunks since already set to 1 */
1804                         chunk_sizes_updated = true;
1805                 } else
1806                         goto cchunk_out;
1807         }
1808
1809 cchunk_out:
1810         kfree(pcchunk);
1811         kfree(retbuf);
1812         if (rc)
1813                 return rc;
1814         else
1815                 return total_bytes_written;
1816 }
1817
1818 static int
1819 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1820                 struct cifs_fid *fid)
1821 {
1822         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1823 }
1824
1825 static unsigned int
1826 smb2_read_data_offset(char *buf)
1827 {
1828         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1829
1830         return rsp->DataOffset;
1831 }
1832
1833 static unsigned int
1834 smb2_read_data_length(char *buf, bool in_remaining)
1835 {
1836         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1837
1838         if (in_remaining)
1839                 return le32_to_cpu(rsp->DataRemaining);
1840
1841         return le32_to_cpu(rsp->DataLength);
1842 }
1843
1844
1845 static int
1846 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1847                struct cifs_io_parms *parms, unsigned int *bytes_read,
1848                char **buf, int *buf_type)
1849 {
1850         parms->persistent_fid = pfid->persistent_fid;
1851         parms->volatile_fid = pfid->volatile_fid;
1852         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1853 }
1854
1855 static int
1856 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1857                 struct cifs_io_parms *parms, unsigned int *written,
1858                 struct kvec *iov, unsigned long nr_segs)
1859 {
1860
1861         parms->persistent_fid = pfid->persistent_fid;
1862         parms->volatile_fid = pfid->volatile_fid;
1863         return SMB2_write(xid, parms, written, iov, nr_segs);
1864 }
1865
1866 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1867 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1868                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1869 {
1870         struct cifsInodeInfo *cifsi;
1871         int rc;
1872
1873         cifsi = CIFS_I(inode);
1874
1875         /* if file already sparse don't bother setting sparse again */
1876         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1877                 return true; /* already sparse */
1878
1879         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1880                 return true; /* already not sparse */
1881
1882         /*
1883          * Can't check for sparse support on share the usual way via the
1884          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1885          * since Samba server doesn't set the flag on the share, yet
1886          * supports the set sparse FSCTL and returns sparse correctly
1887          * in the file attributes. If we fail setting sparse though we
1888          * mark that server does not support sparse files for this share
1889          * to avoid repeatedly sending the unsupported fsctl to server
1890          * if the file is repeatedly extended.
1891          */
1892         if (tcon->broken_sparse_sup)
1893                 return false;
1894
1895         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1896                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1897                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1898         if (rc) {
1899                 tcon->broken_sparse_sup = true;
1900                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1901                 return false;
1902         }
1903
1904         if (setsparse)
1905                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1906         else
1907                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1908
1909         return true;
1910 }
1911
1912 static int
1913 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1914                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1915 {
1916         __le64 eof = cpu_to_le64(size);
1917         struct inode *inode;
1918
1919         /*
1920          * If extending file more than one page make sparse. Many Linux fs
1921          * make files sparse by default when extending via ftruncate
1922          */
1923         inode = d_inode(cfile->dentry);
1924
1925         if (!set_alloc && (size > inode->i_size + 8192)) {
1926                 __u8 set_sparse = 1;
1927
1928                 /* whether set sparse succeeds or not, extend the file */
1929                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1930         }
1931
1932         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1933                             cfile->fid.volatile_fid, cfile->pid, &eof);
1934 }
1935
1936 static int
1937 smb2_duplicate_extents(const unsigned int xid,
1938                         struct cifsFileInfo *srcfile,
1939                         struct cifsFileInfo *trgtfile, u64 src_off,
1940                         u64 len, u64 dest_off)
1941 {
1942         int rc;
1943         unsigned int ret_data_len;
1944         struct inode *inode;
1945         struct duplicate_extents_to_file dup_ext_buf;
1946         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1947
1948         /* server fileays advertise duplicate extent support with this flag */
1949         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1950              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1951                 return -EOPNOTSUPP;
1952
1953         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1954         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1955         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1956         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1957         dup_ext_buf.ByteCount = cpu_to_le64(len);
1958         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1959                 src_off, dest_off, len);
1960
1961         inode = d_inode(trgtfile->dentry);
1962         if (inode->i_size < dest_off + len) {
1963                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1964                 if (rc)
1965                         goto duplicate_extents_out;
1966
1967                 /*
1968                  * Although also could set plausible allocation size (i_blocks)
1969                  * here in addition to setting the file size, in reflink
1970                  * it is likely that the target file is sparse. Its allocation
1971                  * size will be queried on next revalidate, but it is important
1972                  * to make sure that file's cached size is updated immediately
1973                  */
1974                 cifs_setsize(inode, dest_off + len);
1975         }
1976         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1977                         trgtfile->fid.volatile_fid,
1978                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1979                         (char *)&dup_ext_buf,
1980                         sizeof(struct duplicate_extents_to_file),
1981                         CIFSMaxBufSize, NULL,
1982                         &ret_data_len);
1983
1984         if (ret_data_len > 0)
1985                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1986
1987 duplicate_extents_out:
1988         return rc;
1989 }
1990
1991 static int
1992 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1993                    struct cifsFileInfo *cfile)
1994 {
1995         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1996                             cfile->fid.volatile_fid);
1997 }
1998
1999 static int
2000 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2001                    struct cifsFileInfo *cfile)
2002 {
2003         struct fsctl_set_integrity_information_req integr_info;
2004         unsigned int ret_data_len;
2005
2006         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2007         integr_info.Flags = 0;
2008         integr_info.Reserved = 0;
2009
2010         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2011                         cfile->fid.volatile_fid,
2012                         FSCTL_SET_INTEGRITY_INFORMATION,
2013                         (char *)&integr_info,
2014                         sizeof(struct fsctl_set_integrity_information_req),
2015                         CIFSMaxBufSize, NULL,
2016                         &ret_data_len);
2017
2018 }
2019
2020 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2021 #define GMT_TOKEN_SIZE 50
2022
2023 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2024
2025 /*
2026  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2027  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2028  */
2029 static int
2030 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2031                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2032 {
2033         char *retbuf = NULL;
2034         unsigned int ret_data_len = 0;
2035         int rc;
2036         u32 max_response_size;
2037         struct smb_snapshot_array snapshot_in;
2038
2039         /*
2040          * On the first query to enumerate the list of snapshots available
2041          * for this volume the buffer begins with 0 (number of snapshots
2042          * which can be returned is zero since at that point we do not know
2043          * how big the buffer needs to be). On the second query,
2044          * it (ret_data_len) is set to number of snapshots so we can
2045          * know to set the maximum response size larger (see below).
2046          */
2047         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2048                 return -EFAULT;
2049
2050         /*
2051          * Note that for snapshot queries that servers like Azure expect that
2052          * the first query be minimal size (and just used to get the number/size
2053          * of previous versions) so response size must be specified as EXACTLY
2054          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2055          * of eight bytes.
2056          */
2057         if (ret_data_len == 0)
2058                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2059         else
2060                 max_response_size = CIFSMaxBufSize;
2061
2062         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2063                         cfile->fid.volatile_fid,
2064                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2065                         NULL, 0 /* no input data */, max_response_size,
2066                         (char **)&retbuf,
2067                         &ret_data_len);
2068         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2069                         rc, ret_data_len);
2070         if (rc)
2071                 return rc;
2072
2073         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2074                 /* Fixup buffer */
2075                 if (copy_from_user(&snapshot_in, ioc_buf,
2076                     sizeof(struct smb_snapshot_array))) {
2077                         rc = -EFAULT;
2078                         kfree(retbuf);
2079                         return rc;
2080                 }
2081
2082                 /*
2083                  * Check for min size, ie not large enough to fit even one GMT
2084                  * token (snapshot).  On the first ioctl some users may pass in
2085                  * smaller size (or zero) to simply get the size of the array
2086                  * so the user space caller can allocate sufficient memory
2087                  * and retry the ioctl again with larger array size sufficient
2088                  * to hold all of the snapshot GMT tokens on the second try.
2089                  */
2090                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2091                         ret_data_len = sizeof(struct smb_snapshot_array);
2092
2093                 /*
2094                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2095                  * the snapshot array (of 50 byte GMT tokens) each
2096                  * representing an available previous version of the data
2097                  */
2098                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2099                                         sizeof(struct smb_snapshot_array)))
2100                         ret_data_len = snapshot_in.snapshot_array_size +
2101                                         sizeof(struct smb_snapshot_array);
2102
2103                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2104                         rc = -EFAULT;
2105         }
2106
2107         kfree(retbuf);
2108         return rc;
2109 }
2110
2111
2112
2113 static int
2114 smb3_notify(const unsigned int xid, struct file *pfile,
2115             void __user *ioc_buf, bool return_changes)
2116 {
2117         struct smb3_notify_info notify;
2118         struct smb3_notify_info __user *pnotify_buf;
2119         struct dentry *dentry = pfile->f_path.dentry;
2120         struct inode *inode = file_inode(pfile);
2121         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2122         struct cifs_open_parms oparms;
2123         struct cifs_fid fid;
2124         struct cifs_tcon *tcon;
2125         const unsigned char *path;
2126         char *returned_ioctl_info = NULL;
2127         void *page = alloc_dentry_path();
2128         __le16 *utf16_path = NULL;
2129         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2130         int rc = 0;
2131         __u32 ret_len = 0;
2132
2133         path = build_path_from_dentry(dentry, page);
2134         if (IS_ERR(path)) {
2135                 rc = PTR_ERR(path);
2136                 goto notify_exit;
2137         }
2138
2139         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2140         if (utf16_path == NULL) {
2141                 rc = -ENOMEM;
2142                 goto notify_exit;
2143         }
2144
2145         if (return_changes) {
2146                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2147                         rc = -EFAULT;
2148                         goto notify_exit;
2149                 }
2150         } else {
2151                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2152                         rc = -EFAULT;
2153                         goto notify_exit;
2154                 }
2155                 notify.data_len = 0;
2156         }
2157
2158         tcon = cifs_sb_master_tcon(cifs_sb);
2159         oparms = (struct cifs_open_parms) {
2160                 .tcon = tcon,
2161                 .path = path,
2162                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2163                 .disposition = FILE_OPEN,
2164                 .create_options = cifs_create_options(cifs_sb, 0),
2165                 .fid = &fid,
2166         };
2167
2168         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2169                        NULL);
2170         if (rc)
2171                 goto notify_exit;
2172
2173         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2174                                 notify.watch_tree, notify.completion_filter,
2175                                 notify.data_len, &returned_ioctl_info, &ret_len);
2176
2177         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2178
2179         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2180         if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2181                 if (ret_len > notify.data_len)
2182                         ret_len = notify.data_len;
2183                 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2184                 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2185                         rc = -EFAULT;
2186                 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2187                         rc = -EFAULT;
2188         }
2189         kfree(returned_ioctl_info);
2190 notify_exit:
2191         free_dentry_path(page);
2192         kfree(utf16_path);
2193         return rc;
2194 }
2195
2196 static int
2197 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2198                      const char *path, struct cifs_sb_info *cifs_sb,
2199                      struct cifs_fid *fid, __u16 search_flags,
2200                      struct cifs_search_info *srch_inf)
2201 {
2202         __le16 *utf16_path;
2203         struct smb_rqst rqst[2];
2204         struct kvec rsp_iov[2];
2205         int resp_buftype[2];
2206         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2207         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2208         int rc, flags = 0;
2209         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2210         struct cifs_open_parms oparms;
2211         struct smb2_query_directory_rsp *qd_rsp = NULL;
2212         struct smb2_create_rsp *op_rsp = NULL;
2213         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2214         int retry_count = 0;
2215
2216         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2217         if (!utf16_path)
2218                 return -ENOMEM;
2219
2220         if (smb3_encryption_required(tcon))
2221                 flags |= CIFS_TRANSFORM_REQ;
2222
2223         memset(rqst, 0, sizeof(rqst));
2224         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2225         memset(rsp_iov, 0, sizeof(rsp_iov));
2226
2227         /* Open */
2228         memset(&open_iov, 0, sizeof(open_iov));
2229         rqst[0].rq_iov = open_iov;
2230         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2231
2232         oparms = (struct cifs_open_parms) {
2233                 .tcon = tcon,
2234                 .path = path,
2235                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2236                 .disposition = FILE_OPEN,
2237                 .create_options = cifs_create_options(cifs_sb, 0),
2238                 .fid = fid,
2239         };
2240
2241         rc = SMB2_open_init(tcon, server,
2242                             &rqst[0], &oplock, &oparms, utf16_path);
2243         if (rc)
2244                 goto qdf_free;
2245         smb2_set_next_command(tcon, &rqst[0]);
2246
2247         /* Query directory */
2248         srch_inf->entries_in_buffer = 0;
2249         srch_inf->index_of_last_entry = 2;
2250
2251         memset(&qd_iov, 0, sizeof(qd_iov));
2252         rqst[1].rq_iov = qd_iov;
2253         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2254
2255         rc = SMB2_query_directory_init(xid, tcon, server,
2256                                        &rqst[1],
2257                                        COMPOUND_FID, COMPOUND_FID,
2258                                        0, srch_inf->info_level);
2259         if (rc)
2260                 goto qdf_free;
2261
2262         smb2_set_related(&rqst[1]);
2263
2264 again:
2265         rc = compound_send_recv(xid, tcon->ses, server,
2266                                 flags, 2, rqst,
2267                                 resp_buftype, rsp_iov);
2268
2269         if (rc == -EAGAIN && retry_count++ < 10)
2270                 goto again;
2271
2272         /* If the open failed there is nothing to do */
2273         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2274         if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2275                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2276                 goto qdf_free;
2277         }
2278         fid->persistent_fid = op_rsp->PersistentFileId;
2279         fid->volatile_fid = op_rsp->VolatileFileId;
2280
2281         /* Anything else than ENODATA means a genuine error */
2282         if (rc && rc != -ENODATA) {
2283                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2284                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2285                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2286                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2287                 goto qdf_free;
2288         }
2289
2290         atomic_inc(&tcon->num_remote_opens);
2291
2292         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2293         if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2294                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2295                                           tcon->tid, tcon->ses->Suid, 0, 0);
2296                 srch_inf->endOfSearch = true;
2297                 rc = 0;
2298                 goto qdf_free;
2299         }
2300
2301         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2302                                         srch_inf);
2303         if (rc) {
2304                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2305                         tcon->ses->Suid, 0, 0, rc);
2306                 goto qdf_free;
2307         }
2308         resp_buftype[1] = CIFS_NO_BUFFER;
2309
2310         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2311                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2312
2313  qdf_free:
2314         kfree(utf16_path);
2315         SMB2_open_free(&rqst[0]);
2316         SMB2_query_directory_free(&rqst[1]);
2317         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2318         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2319         return rc;
2320 }
2321
2322 static int
2323 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2324                     struct cifs_fid *fid, __u16 search_flags,
2325                     struct cifs_search_info *srch_inf)
2326 {
2327         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2328                                     fid->volatile_fid, 0, srch_inf);
2329 }
2330
2331 static int
2332 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2333                struct cifs_fid *fid)
2334 {
2335         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2336 }
2337
2338 /*
2339  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2340  * the number of credits and return true. Otherwise - return false.
2341  */
2342 static bool
2343 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2344 {
2345         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2346         int scredits, in_flight;
2347
2348         if (shdr->Status != STATUS_PENDING)
2349                 return false;
2350
2351         if (shdr->CreditRequest) {
2352                 spin_lock(&server->req_lock);
2353                 server->credits += le16_to_cpu(shdr->CreditRequest);
2354                 scredits = server->credits;
2355                 in_flight = server->in_flight;
2356                 spin_unlock(&server->req_lock);
2357                 wake_up(&server->request_q);
2358
2359                 trace_smb3_pend_credits(server->CurrentMid,
2360                                 server->conn_id, server->hostname, scredits,
2361                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2362                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2363                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2364         }
2365
2366         return true;
2367 }
2368
2369 static bool
2370 smb2_is_session_expired(char *buf)
2371 {
2372         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2373
2374         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2375             shdr->Status != STATUS_USER_SESSION_DELETED)
2376                 return false;
2377
2378         trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2379                                le64_to_cpu(shdr->SessionId),
2380                                le16_to_cpu(shdr->Command),
2381                                le64_to_cpu(shdr->MessageId));
2382         cifs_dbg(FYI, "Session expired or deleted\n");
2383
2384         return true;
2385 }
2386
2387 static bool
2388 smb2_is_status_io_timeout(char *buf)
2389 {
2390         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2391
2392         if (shdr->Status == STATUS_IO_TIMEOUT)
2393                 return true;
2394         else
2395                 return false;
2396 }
2397
2398 static bool
2399 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2400 {
2401         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2402         struct TCP_Server_Info *pserver;
2403         struct cifs_ses *ses;
2404         struct cifs_tcon *tcon;
2405
2406         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2407                 return false;
2408
2409         /* If server is a channel, select the primary channel */
2410         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
2411
2412         spin_lock(&cifs_tcp_ses_lock);
2413         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2414                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2415                         if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2416                                 spin_lock(&tcon->tc_lock);
2417                                 tcon->need_reconnect = true;
2418                                 spin_unlock(&tcon->tc_lock);
2419                                 spin_unlock(&cifs_tcp_ses_lock);
2420                                 pr_warn_once("Server share %s deleted.\n",
2421                                              tcon->tree_name);
2422                                 return true;
2423                         }
2424                 }
2425         }
2426         spin_unlock(&cifs_tcp_ses_lock);
2427
2428         return false;
2429 }
2430
2431 static int
2432 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2433                 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2434 {
2435         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2436                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2437                                         smb2_get_lease_state(cinode));
2438
2439         return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2440                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2441 }
2442
2443 void
2444 smb2_set_related(struct smb_rqst *rqst)
2445 {
2446         struct smb2_hdr *shdr;
2447
2448         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2449         if (shdr == NULL) {
2450                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2451                 return;
2452         }
2453         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2454 }
2455
2456 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2457
2458 void
2459 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2460 {
2461         struct smb2_hdr *shdr;
2462         struct cifs_ses *ses = tcon->ses;
2463         struct TCP_Server_Info *server = ses->server;
2464         unsigned long len = smb_rqst_len(server, rqst);
2465         int i, num_padding;
2466
2467         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2468         if (shdr == NULL) {
2469                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2470                 return;
2471         }
2472
2473         /* SMB headers in a compound are 8 byte aligned. */
2474
2475         /* No padding needed */
2476         if (!(len & 7))
2477                 goto finished;
2478
2479         num_padding = 8 - (len & 7);
2480         if (!smb3_encryption_required(tcon)) {
2481                 /*
2482                  * If we do not have encryption then we can just add an extra
2483                  * iov for the padding.
2484                  */
2485                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2486                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2487                 rqst->rq_nvec++;
2488                 len += num_padding;
2489         } else {
2490                 /*
2491                  * We can not add a small padding iov for the encryption case
2492                  * because the encryption framework can not handle the padding
2493                  * iovs.
2494                  * We have to flatten this into a single buffer and add
2495                  * the padding to it.
2496                  */
2497                 for (i = 1; i < rqst->rq_nvec; i++) {
2498                         memcpy(rqst->rq_iov[0].iov_base +
2499                                rqst->rq_iov[0].iov_len,
2500                                rqst->rq_iov[i].iov_base,
2501                                rqst->rq_iov[i].iov_len);
2502                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2503                 }
2504                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2505                        0, num_padding);
2506                 rqst->rq_iov[0].iov_len += num_padding;
2507                 len += num_padding;
2508                 rqst->rq_nvec = 1;
2509         }
2510
2511  finished:
2512         shdr->NextCommand = cpu_to_le32(len);
2513 }
2514
2515 /*
2516  * Passes the query info response back to the caller on success.
2517  * Caller need to free this with free_rsp_buf().
2518  */
2519 int
2520 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2521                          const char *path, u32 desired_access,
2522                          u32 class, u32 type, u32 output_len,
2523                          struct kvec *rsp, int *buftype,
2524                          struct cifs_sb_info *cifs_sb)
2525 {
2526         struct smb2_compound_vars *vars;
2527         struct cifs_ses *ses = tcon->ses;
2528         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2529         int flags = CIFS_CP_CREATE_CLOSE_OP;
2530         struct smb_rqst *rqst;
2531         int resp_buftype[3];
2532         struct kvec *rsp_iov;
2533         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2534         struct cifs_open_parms oparms;
2535         struct cifs_fid fid;
2536         int rc;
2537         __le16 *utf16_path;
2538         struct cached_fid *cfid = NULL;
2539
2540         if (!path)
2541                 path = "";
2542         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2543         if (!utf16_path)
2544                 return -ENOMEM;
2545
2546         if (smb3_encryption_required(tcon))
2547                 flags |= CIFS_TRANSFORM_REQ;
2548
2549         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2550         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
2551         if (!vars) {
2552                 rc = -ENOMEM;
2553                 goto out_free_path;
2554         }
2555         rqst = vars->rqst;
2556         rsp_iov = vars->rsp_iov;
2557
2558         /*
2559          * We can only call this for things we know are directories.
2560          */
2561         if (!strcmp(path, ""))
2562                 open_cached_dir(xid, tcon, path, cifs_sb, false,
2563                                 &cfid); /* cfid null if open dir failed */
2564
2565         rqst[0].rq_iov = vars->open_iov;
2566         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2567
2568         oparms = (struct cifs_open_parms) {
2569                 .tcon = tcon,
2570                 .path = path,
2571                 .desired_access = desired_access,
2572                 .disposition = FILE_OPEN,
2573                 .create_options = cifs_create_options(cifs_sb, 0),
2574                 .fid = &fid,
2575         };
2576
2577         rc = SMB2_open_init(tcon, server,
2578                             &rqst[0], &oplock, &oparms, utf16_path);
2579         if (rc)
2580                 goto qic_exit;
2581         smb2_set_next_command(tcon, &rqst[0]);
2582
2583         rqst[1].rq_iov = &vars->qi_iov;
2584         rqst[1].rq_nvec = 1;
2585
2586         if (cfid) {
2587                 rc = SMB2_query_info_init(tcon, server,
2588                                           &rqst[1],
2589                                           cfid->fid.persistent_fid,
2590                                           cfid->fid.volatile_fid,
2591                                           class, type, 0,
2592                                           output_len, 0,
2593                                           NULL);
2594         } else {
2595                 rc = SMB2_query_info_init(tcon, server,
2596                                           &rqst[1],
2597                                           COMPOUND_FID,
2598                                           COMPOUND_FID,
2599                                           class, type, 0,
2600                                           output_len, 0,
2601                                           NULL);
2602         }
2603         if (rc)
2604                 goto qic_exit;
2605         if (!cfid) {
2606                 smb2_set_next_command(tcon, &rqst[1]);
2607                 smb2_set_related(&rqst[1]);
2608         }
2609
2610         rqst[2].rq_iov = &vars->close_iov;
2611         rqst[2].rq_nvec = 1;
2612
2613         rc = SMB2_close_init(tcon, server,
2614                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2615         if (rc)
2616                 goto qic_exit;
2617         smb2_set_related(&rqst[2]);
2618
2619         if (cfid) {
2620                 rc = compound_send_recv(xid, ses, server,
2621                                         flags, 1, &rqst[1],
2622                                         &resp_buftype[1], &rsp_iov[1]);
2623         } else {
2624                 rc = compound_send_recv(xid, ses, server,
2625                                         flags, 3, rqst,
2626                                         resp_buftype, rsp_iov);
2627         }
2628         if (rc) {
2629                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2630                 if (rc == -EREMCHG) {
2631                         tcon->need_reconnect = true;
2632                         pr_warn_once("server share %s deleted\n",
2633                                      tcon->tree_name);
2634                 }
2635                 goto qic_exit;
2636         }
2637         *rsp = rsp_iov[1];
2638         *buftype = resp_buftype[1];
2639
2640  qic_exit:
2641         SMB2_open_free(&rqst[0]);
2642         SMB2_query_info_free(&rqst[1]);
2643         SMB2_close_free(&rqst[2]);
2644         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2645         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2646         if (cfid)
2647                 close_cached_dir(cfid);
2648         kfree(vars);
2649 out_free_path:
2650         kfree(utf16_path);
2651         return rc;
2652 }
2653
2654 static int
2655 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2656              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2657 {
2658         struct smb2_query_info_rsp *rsp;
2659         struct smb2_fs_full_size_info *info = NULL;
2660         struct kvec rsp_iov = {NULL, 0};
2661         int buftype = CIFS_NO_BUFFER;
2662         int rc;
2663
2664
2665         rc = smb2_query_info_compound(xid, tcon, "",
2666                                       FILE_READ_ATTRIBUTES,
2667                                       FS_FULL_SIZE_INFORMATION,
2668                                       SMB2_O_INFO_FILESYSTEM,
2669                                       sizeof(struct smb2_fs_full_size_info),
2670                                       &rsp_iov, &buftype, cifs_sb);
2671         if (rc)
2672                 goto qfs_exit;
2673
2674         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2675         buf->f_type = SMB2_SUPER_MAGIC;
2676         info = (struct smb2_fs_full_size_info *)(
2677                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2678         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2679                                le32_to_cpu(rsp->OutputBufferLength),
2680                                &rsp_iov,
2681                                sizeof(struct smb2_fs_full_size_info));
2682         if (!rc)
2683                 smb2_copy_fs_info_to_kstatfs(info, buf);
2684
2685 qfs_exit:
2686         trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
2687         free_rsp_buf(buftype, rsp_iov.iov_base);
2688         return rc;
2689 }
2690
2691 static int
2692 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2693                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2694 {
2695         int rc;
2696         __le16 srch_path = 0; /* Null - open root of share */
2697         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2698         struct cifs_open_parms oparms;
2699         struct cifs_fid fid;
2700
2701         if (!tcon->posix_extensions)
2702                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2703
2704         oparms = (struct cifs_open_parms) {
2705                 .tcon = tcon,
2706                 .path = "",
2707                 .desired_access = FILE_READ_ATTRIBUTES,
2708                 .disposition = FILE_OPEN,
2709                 .create_options = cifs_create_options(cifs_sb, 0),
2710                 .fid = &fid,
2711         };
2712
2713         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2714                        NULL, NULL);
2715         if (rc)
2716                 return rc;
2717
2718         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2719                                    fid.volatile_fid, buf);
2720         buf->f_type = SMB2_SUPER_MAGIC;
2721         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2722         return rc;
2723 }
2724
2725 static bool
2726 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2727 {
2728         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2729                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2730 }
2731
2732 static int
2733 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2734                __u64 length, __u32 type, int lock, int unlock, bool wait)
2735 {
2736         if (unlock && !lock)
2737                 type = SMB2_LOCKFLAG_UNLOCK;
2738         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2739                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2740                          current->tgid, length, offset, type, wait);
2741 }
2742
2743 static void
2744 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2745 {
2746         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2747 }
2748
2749 static void
2750 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2751 {
2752         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2753 }
2754
2755 static void
2756 smb2_new_lease_key(struct cifs_fid *fid)
2757 {
2758         generate_random_uuid(fid->lease_key);
2759 }
2760
2761 static int
2762 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2763                    const char *search_name,
2764                    struct dfs_info3_param **target_nodes,
2765                    unsigned int *num_of_nodes,
2766                    const struct nls_table *nls_codepage, int remap)
2767 {
2768         int rc;
2769         __le16 *utf16_path = NULL;
2770         int utf16_path_len = 0;
2771         struct cifs_tcon *tcon;
2772         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2773         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2774         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2775         int retry_count = 0;
2776
2777         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2778
2779         /*
2780          * Try to use the IPC tcon, otherwise just use any
2781          */
2782         tcon = ses->tcon_ipc;
2783         if (tcon == NULL) {
2784                 spin_lock(&cifs_tcp_ses_lock);
2785                 tcon = list_first_entry_or_null(&ses->tcon_list,
2786                                                 struct cifs_tcon,
2787                                                 tcon_list);
2788                 if (tcon)
2789                         tcon->tc_count++;
2790                 spin_unlock(&cifs_tcp_ses_lock);
2791         }
2792
2793         if (tcon == NULL) {
2794                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2795                          ses);
2796                 rc = -ENOTCONN;
2797                 goto out;
2798         }
2799
2800         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2801                                            &utf16_path_len,
2802                                            nls_codepage, remap);
2803         if (!utf16_path) {
2804                 rc = -ENOMEM;
2805                 goto out;
2806         }
2807
2808         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2809         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2810         if (!dfs_req) {
2811                 rc = -ENOMEM;
2812                 goto out;
2813         }
2814
2815         /* Highest DFS referral version understood */
2816         dfs_req->MaxReferralLevel = DFS_VERSION;
2817
2818         /* Path to resolve in an UTF-16 null-terminated string */
2819         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2820
2821         do {
2822                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2823                                 FSCTL_DFS_GET_REFERRALS,
2824                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2825                                 (char **)&dfs_rsp, &dfs_rsp_size);
2826                 if (!is_retryable_error(rc))
2827                         break;
2828                 usleep_range(512, 2048);
2829         } while (++retry_count < 5);
2830
2831         if (rc) {
2832                 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2833                         cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2834                 goto out;
2835         }
2836
2837         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2838                                  num_of_nodes, target_nodes,
2839                                  nls_codepage, remap, search_name,
2840                                  true /* is_unicode */);
2841         if (rc) {
2842                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2843                 goto out;
2844         }
2845
2846  out:
2847         if (tcon && !tcon->ipc) {
2848                 /* ipc tcons are not refcounted */
2849                 spin_lock(&cifs_tcp_ses_lock);
2850                 tcon->tc_count--;
2851                 /* tc_count can never go negative */
2852                 WARN_ON(tcon->tc_count < 0);
2853                 spin_unlock(&cifs_tcp_ses_lock);
2854         }
2855         kfree(utf16_path);
2856         kfree(dfs_req);
2857         kfree(dfs_rsp);
2858         return rc;
2859 }
2860
2861 static int
2862 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2863                       u32 plen, char **target_path,
2864                       struct cifs_sb_info *cifs_sb)
2865 {
2866         unsigned int len;
2867
2868         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2869         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2870
2871         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2872                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2873                         le64_to_cpu(symlink_buf->InodeType));
2874                 return -EOPNOTSUPP;
2875         }
2876
2877         *target_path = cifs_strndup_from_utf16(
2878                                 symlink_buf->PathBuffer,
2879                                 len, true, cifs_sb->local_nls);
2880         if (!(*target_path))
2881                 return -ENOMEM;
2882
2883         convert_delimiter(*target_path, '/');
2884         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2885
2886         return 0;
2887 }
2888
2889 static int
2890 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2891                       u32 plen, char **target_path,
2892                       struct cifs_sb_info *cifs_sb)
2893 {
2894         unsigned int sub_len;
2895         unsigned int sub_offset;
2896
2897         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2898
2899         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2900         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2901         if (sub_offset + 20 > plen ||
2902             sub_offset + sub_len + 20 > plen) {
2903                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2904                 return -EIO;
2905         }
2906
2907         *target_path = cifs_strndup_from_utf16(
2908                                 symlink_buf->PathBuffer + sub_offset,
2909                                 sub_len, true, cifs_sb->local_nls);
2910         if (!(*target_path))
2911                 return -ENOMEM;
2912
2913         convert_delimiter(*target_path, '/');
2914         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2915
2916         return 0;
2917 }
2918
2919 static int
2920 parse_reparse_point(struct reparse_data_buffer *buf,
2921                     u32 plen, char **target_path,
2922                     struct cifs_sb_info *cifs_sb)
2923 {
2924         if (plen < sizeof(struct reparse_data_buffer)) {
2925                 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2926                          plen);
2927                 return -EIO;
2928         }
2929
2930         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2931             sizeof(struct reparse_data_buffer)) {
2932                 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2933                          plen);
2934                 return -EIO;
2935         }
2936
2937         /* See MS-FSCC 2.1.2 */
2938         switch (le32_to_cpu(buf->ReparseTag)) {
2939         case IO_REPARSE_TAG_NFS:
2940                 return parse_reparse_posix(
2941                         (struct reparse_posix_data *)buf,
2942                         plen, target_path, cifs_sb);
2943         case IO_REPARSE_TAG_SYMLINK:
2944                 return parse_reparse_symlink(
2945                         (struct reparse_symlink_data_buffer *)buf,
2946                         plen, target_path, cifs_sb);
2947         default:
2948                 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
2949                          le32_to_cpu(buf->ReparseTag));
2950                 return -EOPNOTSUPP;
2951         }
2952 }
2953
2954 static int smb2_query_symlink(const unsigned int xid,
2955                               struct cifs_tcon *tcon,
2956                               struct cifs_sb_info *cifs_sb,
2957                               const char *full_path,
2958                               char **target_path,
2959                               struct kvec *rsp_iov)
2960 {
2961         struct reparse_data_buffer *buf;
2962         struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
2963         u32 plen = le32_to_cpu(io->OutputCount);
2964
2965         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2966
2967         buf = (struct reparse_data_buffer *)((u8 *)io +
2968                                              le32_to_cpu(io->OutputOffset));
2969         return parse_reparse_point(buf, plen, target_path, cifs_sb);
2970 }
2971
2972 static int smb2_query_reparse_point(const unsigned int xid,
2973                                     struct cifs_tcon *tcon,
2974                                     struct cifs_sb_info *cifs_sb,
2975                                     const char *full_path,
2976                                     u32 *tag, struct kvec *rsp,
2977                                     int *rsp_buftype)
2978 {
2979         struct smb2_compound_vars *vars;
2980         int rc;
2981         __le16 *utf16_path = NULL;
2982         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2983         struct cifs_open_parms oparms;
2984         struct cifs_fid fid;
2985         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2986         int flags = CIFS_CP_CREATE_CLOSE_OP;
2987         struct smb_rqst *rqst;
2988         int resp_buftype[3];
2989         struct kvec *rsp_iov;
2990         struct smb2_ioctl_rsp *ioctl_rsp;
2991         struct reparse_data_buffer *reparse_buf;
2992         u32 plen;
2993
2994         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2995
2996         if (smb3_encryption_required(tcon))
2997                 flags |= CIFS_TRANSFORM_REQ;
2998
2999         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3000         if (!utf16_path)
3001                 return -ENOMEM;
3002
3003         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3004         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
3005         if (!vars) {
3006                 rc = -ENOMEM;
3007                 goto out_free_path;
3008         }
3009         rqst = vars->rqst;
3010         rsp_iov = vars->rsp_iov;
3011
3012         /*
3013          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3014          * to see if there is a handle already open that we can use
3015          */
3016         rqst[0].rq_iov = vars->open_iov;
3017         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3018
3019         oparms = (struct cifs_open_parms) {
3020                 .tcon = tcon,
3021                 .path = full_path,
3022                 .desired_access = FILE_READ_ATTRIBUTES,
3023                 .disposition = FILE_OPEN,
3024                 .create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
3025                 .fid = &fid,
3026         };
3027
3028         rc = SMB2_open_init(tcon, server,
3029                             &rqst[0], &oplock, &oparms, utf16_path);
3030         if (rc)
3031                 goto query_rp_exit;
3032         smb2_set_next_command(tcon, &rqst[0]);
3033
3034
3035         /* IOCTL */
3036         rqst[1].rq_iov = vars->io_iov;
3037         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3038
3039         rc = SMB2_ioctl_init(tcon, server,
3040                              &rqst[1], COMPOUND_FID,
3041                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3042                              CIFSMaxBufSize -
3043                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3044                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3045         if (rc)
3046                 goto query_rp_exit;
3047
3048         smb2_set_next_command(tcon, &rqst[1]);
3049         smb2_set_related(&rqst[1]);
3050
3051         /* Close */
3052         rqst[2].rq_iov = &vars->close_iov;
3053         rqst[2].rq_nvec = 1;
3054
3055         rc = SMB2_close_init(tcon, server,
3056                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3057         if (rc)
3058                 goto query_rp_exit;
3059
3060         smb2_set_related(&rqst[2]);
3061
3062         rc = compound_send_recv(xid, tcon->ses, server,
3063                                 flags, 3, rqst,
3064                                 resp_buftype, rsp_iov);
3065
3066         ioctl_rsp = rsp_iov[1].iov_base;
3067
3068         /*
3069          * Open was successful and we got an ioctl response.
3070          */
3071         if (rc == 0) {
3072                 /* See MS-FSCC 2.3.23 */
3073
3074                 reparse_buf = (struct reparse_data_buffer *)
3075                         ((char *)ioctl_rsp +
3076                          le32_to_cpu(ioctl_rsp->OutputOffset));
3077                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3078
3079                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3080                     rsp_iov[1].iov_len) {
3081                         cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3082                                  plen);
3083                         rc = -EIO;
3084                         goto query_rp_exit;
3085                 }
3086                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3087                 *rsp = rsp_iov[1];
3088                 *rsp_buftype = resp_buftype[1];
3089                 resp_buftype[1] = CIFS_NO_BUFFER;
3090         }
3091
3092  query_rp_exit:
3093         SMB2_open_free(&rqst[0]);
3094         SMB2_ioctl_free(&rqst[1]);
3095         SMB2_close_free(&rqst[2]);
3096         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3097         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3098         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3099         kfree(vars);
3100 out_free_path:
3101         kfree(utf16_path);
3102         return rc;
3103 }
3104
3105 static struct cifs_ntsd *
3106 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3107                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3108 {
3109         struct cifs_ntsd *pntsd = NULL;
3110         unsigned int xid;
3111         int rc = -EOPNOTSUPP;
3112         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3113
3114         if (IS_ERR(tlink))
3115                 return ERR_CAST(tlink);
3116
3117         xid = get_xid();
3118         cifs_dbg(FYI, "trying to get acl\n");
3119
3120         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3121                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3122                             info);
3123         free_xid(xid);
3124
3125         cifs_put_tlink(tlink);
3126
3127         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3128         if (rc)
3129                 return ERR_PTR(rc);
3130         return pntsd;
3131
3132 }
3133
3134 static struct cifs_ntsd *
3135 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3136                      const char *path, u32 *pacllen, u32 info)
3137 {
3138         struct cifs_ntsd *pntsd = NULL;
3139         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3140         unsigned int xid;
3141         int rc;
3142         struct cifs_tcon *tcon;
3143         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3144         struct cifs_fid fid;
3145         struct cifs_open_parms oparms;
3146         __le16 *utf16_path;
3147
3148         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3149         if (IS_ERR(tlink))
3150                 return ERR_CAST(tlink);
3151
3152         tcon = tlink_tcon(tlink);
3153         xid = get_xid();
3154
3155         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3156         if (!utf16_path) {
3157                 rc = -ENOMEM;
3158                 free_xid(xid);
3159                 return ERR_PTR(rc);
3160         }
3161
3162         oparms = (struct cifs_open_parms) {
3163                 .tcon = tcon,
3164                 .path = path,
3165                 .desired_access = READ_CONTROL,
3166                 .disposition = FILE_OPEN,
3167                 /*
3168                  * When querying an ACL, even if the file is a symlink
3169                  * we want to open the source not the target, and so
3170                  * the protocol requires that the client specify this
3171                  * flag when opening a reparse point
3172                  */
3173                 .create_options = cifs_create_options(cifs_sb, 0) |
3174                                   OPEN_REPARSE_POINT,
3175                 .fid = &fid,
3176         };
3177
3178         if (info & SACL_SECINFO)
3179                 oparms.desired_access |= SYSTEM_SECURITY;
3180
3181         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3182                        NULL);
3183         kfree(utf16_path);
3184         if (!rc) {
3185                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3186                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3187                                     info);
3188                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3189         }
3190
3191         cifs_put_tlink(tlink);
3192         free_xid(xid);
3193
3194         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3195         if (rc)
3196                 return ERR_PTR(rc);
3197         return pntsd;
3198 }
3199
3200 static int
3201 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3202                 struct inode *inode, const char *path, int aclflag)
3203 {
3204         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3205         unsigned int xid;
3206         int rc, access_flags = 0;
3207         struct cifs_tcon *tcon;
3208         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3209         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3210         struct cifs_fid fid;
3211         struct cifs_open_parms oparms;
3212         __le16 *utf16_path;
3213
3214         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3215         if (IS_ERR(tlink))
3216                 return PTR_ERR(tlink);
3217
3218         tcon = tlink_tcon(tlink);
3219         xid = get_xid();
3220
3221         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3222                 access_flags |= WRITE_OWNER;
3223         if (aclflag & CIFS_ACL_SACL)
3224                 access_flags |= SYSTEM_SECURITY;
3225         if (aclflag & CIFS_ACL_DACL)
3226                 access_flags |= WRITE_DAC;
3227
3228         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3229         if (!utf16_path) {
3230                 rc = -ENOMEM;
3231                 free_xid(xid);
3232                 return rc;
3233         }
3234
3235         oparms = (struct cifs_open_parms) {
3236                 .tcon = tcon,
3237                 .desired_access = access_flags,
3238                 .create_options = cifs_create_options(cifs_sb, 0),
3239                 .disposition = FILE_OPEN,
3240                 .path = path,
3241                 .fid = &fid,
3242         };
3243
3244         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3245                        NULL, NULL);
3246         kfree(utf16_path);
3247         if (!rc) {
3248                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3249                             fid.volatile_fid, pnntsd, acllen, aclflag);
3250                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3251         }
3252
3253         cifs_put_tlink(tlink);
3254         free_xid(xid);
3255         return rc;
3256 }
3257
3258 /* Retrieve an ACL from the server */
3259 static struct cifs_ntsd *
3260 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3261              struct inode *inode, const char *path,
3262              u32 *pacllen, u32 info)
3263 {
3264         struct cifs_ntsd *pntsd = NULL;
3265         struct cifsFileInfo *open_file = NULL;
3266
3267         if (inode && !(info & SACL_SECINFO))
3268                 open_file = find_readable_file(CIFS_I(inode), true);
3269         if (!open_file || (info & SACL_SECINFO))
3270                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3271
3272         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3273         cifsFileInfo_put(open_file);
3274         return pntsd;
3275 }
3276
3277 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3278                              loff_t offset, loff_t len, unsigned int xid)
3279 {
3280         struct cifsFileInfo *cfile = file->private_data;
3281         struct file_zero_data_information fsctl_buf;
3282
3283         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3284
3285         fsctl_buf.FileOffset = cpu_to_le64(offset);
3286         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3287
3288         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3289                           cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3290                           (char *)&fsctl_buf,
3291                           sizeof(struct file_zero_data_information),
3292                           0, NULL, NULL);
3293 }
3294
3295 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3296                             loff_t offset, loff_t len, bool keep_size)
3297 {
3298         struct cifs_ses *ses = tcon->ses;
3299         struct inode *inode = file_inode(file);
3300         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3301         struct cifsFileInfo *cfile = file->private_data;
3302         long rc;
3303         unsigned int xid;
3304         __le64 eof;
3305
3306         xid = get_xid();
3307
3308         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3309                               ses->Suid, offset, len);
3310
3311         inode_lock(inode);
3312         filemap_invalidate_lock(inode->i_mapping);
3313
3314         /*
3315          * We zero the range through ioctl, so we need remove the page caches
3316          * first, otherwise the data may be inconsistent with the server.
3317          */
3318         truncate_pagecache_range(inode, offset, offset + len - 1);
3319
3320         /* if file not oplocked can't be sure whether asking to extend size */
3321         rc = -EOPNOTSUPP;
3322         if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3323                 goto zero_range_exit;
3324
3325         rc = smb3_zero_data(file, tcon, offset, len, xid);
3326         if (rc < 0)
3327                 goto zero_range_exit;
3328
3329         /*
3330          * do we also need to change the size of the file?
3331          */
3332         if (keep_size == false && i_size_read(inode) < offset + len) {
3333                 eof = cpu_to_le64(offset + len);
3334                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3335                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3336         }
3337
3338  zero_range_exit:
3339         filemap_invalidate_unlock(inode->i_mapping);
3340         inode_unlock(inode);
3341         free_xid(xid);
3342         if (rc)
3343                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3344                               ses->Suid, offset, len, rc);
3345         else
3346                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3347                               ses->Suid, offset, len);
3348         return rc;
3349 }
3350
3351 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3352                             loff_t offset, loff_t len)
3353 {
3354         struct inode *inode = file_inode(file);
3355         struct cifsFileInfo *cfile = file->private_data;
3356         struct file_zero_data_information fsctl_buf;
3357         long rc;
3358         unsigned int xid;
3359         __u8 set_sparse = 1;
3360
3361         xid = get_xid();
3362
3363         inode_lock(inode);
3364         /* Need to make file sparse, if not already, before freeing range. */
3365         /* Consider adding equivalent for compressed since it could also work */
3366         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3367                 rc = -EOPNOTSUPP;
3368                 goto out;
3369         }
3370
3371         filemap_invalidate_lock(inode->i_mapping);
3372         /*
3373          * We implement the punch hole through ioctl, so we need remove the page
3374          * caches first, otherwise the data may be inconsistent with the server.
3375          */
3376         truncate_pagecache_range(inode, offset, offset + len - 1);
3377
3378         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3379
3380         fsctl_buf.FileOffset = cpu_to_le64(offset);
3381         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3382
3383         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3384                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3385                         (char *)&fsctl_buf,
3386                         sizeof(struct file_zero_data_information),
3387                         CIFSMaxBufSize, NULL, NULL);
3388         filemap_invalidate_unlock(inode->i_mapping);
3389 out:
3390         inode_unlock(inode);
3391         free_xid(xid);
3392         return rc;
3393 }
3394
3395 static int smb3_simple_fallocate_write_range(unsigned int xid,
3396                                              struct cifs_tcon *tcon,
3397                                              struct cifsFileInfo *cfile,
3398                                              loff_t off, loff_t len,
3399                                              char *buf)
3400 {
3401         struct cifs_io_parms io_parms = {0};
3402         int nbytes;
3403         int rc = 0;
3404         struct kvec iov[2];
3405
3406         io_parms.netfid = cfile->fid.netfid;
3407         io_parms.pid = current->tgid;
3408         io_parms.tcon = tcon;
3409         io_parms.persistent_fid = cfile->fid.persistent_fid;
3410         io_parms.volatile_fid = cfile->fid.volatile_fid;
3411
3412         while (len) {
3413                 io_parms.offset = off;
3414                 io_parms.length = len;
3415                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3416                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3417                 /* iov[0] is reserved for smb header */
3418                 iov[1].iov_base = buf;
3419                 iov[1].iov_len = io_parms.length;
3420                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3421                 if (rc)
3422                         break;
3423                 if (nbytes > len)
3424                         return -EINVAL;
3425                 buf += nbytes;
3426                 off += nbytes;
3427                 len -= nbytes;
3428         }
3429         return rc;
3430 }
3431
3432 static int smb3_simple_fallocate_range(unsigned int xid,
3433                                        struct cifs_tcon *tcon,
3434                                        struct cifsFileInfo *cfile,
3435                                        loff_t off, loff_t len)
3436 {
3437         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3438         u32 out_data_len;
3439         char *buf = NULL;
3440         loff_t l;
3441         int rc;
3442
3443         in_data.file_offset = cpu_to_le64(off);
3444         in_data.length = cpu_to_le64(len);
3445         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3446                         cfile->fid.volatile_fid,
3447                         FSCTL_QUERY_ALLOCATED_RANGES,
3448                         (char *)&in_data, sizeof(in_data),
3449                         1024 * sizeof(struct file_allocated_range_buffer),
3450                         (char **)&out_data, &out_data_len);
3451         if (rc)
3452                 goto out;
3453
3454         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3455         if (buf == NULL) {
3456                 rc = -ENOMEM;
3457                 goto out;
3458         }
3459
3460         tmp_data = out_data;
3461         while (len) {
3462                 /*
3463                  * The rest of the region is unmapped so write it all.
3464                  */
3465                 if (out_data_len == 0) {
3466                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3467                                                cfile, off, len, buf);
3468                         goto out;
3469                 }
3470
3471                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3472                         rc = -EINVAL;
3473                         goto out;
3474                 }
3475
3476                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3477                         /*
3478                          * We are at a hole. Write until the end of the region
3479                          * or until the next allocated data,
3480                          * whichever comes next.
3481                          */
3482                         l = le64_to_cpu(tmp_data->file_offset) - off;
3483                         if (len < l)
3484                                 l = len;
3485                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3486                                                cfile, off, l, buf);
3487                         if (rc)
3488                                 goto out;
3489                         off = off + l;
3490                         len = len - l;
3491                         if (len == 0)
3492                                 goto out;
3493                 }
3494                 /*
3495                  * We are at a section of allocated data, just skip forward
3496                  * until the end of the data or the end of the region
3497                  * we are supposed to fallocate, whichever comes first.
3498                  */
3499                 l = le64_to_cpu(tmp_data->length);
3500                 if (len < l)
3501                         l = len;
3502                 off += l;
3503                 len -= l;
3504
3505                 tmp_data = &tmp_data[1];
3506                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3507         }
3508
3509  out:
3510         kfree(out_data);
3511         kfree(buf);
3512         return rc;
3513 }
3514
3515
3516 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3517                             loff_t off, loff_t len, bool keep_size)
3518 {
3519         struct inode *inode;
3520         struct cifsInodeInfo *cifsi;
3521         struct cifsFileInfo *cfile = file->private_data;
3522         long rc = -EOPNOTSUPP;
3523         unsigned int xid;
3524         __le64 eof;
3525
3526         xid = get_xid();
3527
3528         inode = d_inode(cfile->dentry);
3529         cifsi = CIFS_I(inode);
3530
3531         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3532                                 tcon->ses->Suid, off, len);
3533         /* if file not oplocked can't be sure whether asking to extend size */
3534         if (!CIFS_CACHE_READ(cifsi))
3535                 if (keep_size == false) {
3536                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3537                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3538                         free_xid(xid);
3539                         return rc;
3540                 }
3541
3542         /*
3543          * Extending the file
3544          */
3545         if ((keep_size == false) && i_size_read(inode) < off + len) {
3546                 rc = inode_newsize_ok(inode, off + len);
3547                 if (rc)
3548                         goto out;
3549
3550                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3551                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3552
3553                 eof = cpu_to_le64(off + len);
3554                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3555                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3556                 if (rc == 0) {
3557                         cifsi->server_eof = off + len;
3558                         cifs_setsize(inode, off + len);
3559                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3560                         truncate_setsize(inode, off + len);
3561                 }
3562                 goto out;
3563         }
3564
3565         /*
3566          * Files are non-sparse by default so falloc may be a no-op
3567          * Must check if file sparse. If not sparse, and since we are not
3568          * extending then no need to do anything since file already allocated
3569          */
3570         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3571                 rc = 0;
3572                 goto out;
3573         }
3574
3575         if (keep_size == true) {
3576                 /*
3577                  * We can not preallocate pages beyond the end of the file
3578                  * in SMB2
3579                  */
3580                 if (off >= i_size_read(inode)) {
3581                         rc = 0;
3582                         goto out;
3583                 }
3584                 /*
3585                  * For fallocates that are partially beyond the end of file,
3586                  * clamp len so we only fallocate up to the end of file.
3587                  */
3588                 if (off + len > i_size_read(inode)) {
3589                         len = i_size_read(inode) - off;
3590                 }
3591         }
3592
3593         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3594                 /*
3595                  * At this point, we are trying to fallocate an internal
3596                  * regions of a sparse file. Since smb2 does not have a
3597                  * fallocate command we have two otions on how to emulate this.
3598                  * We can either turn the entire file to become non-sparse
3599                  * which we only do if the fallocate is for virtually
3600                  * the whole file,  or we can overwrite the region with zeroes
3601                  * using SMB2_write, which could be prohibitevly expensive
3602                  * if len is large.
3603                  */
3604                 /*
3605                  * We are only trying to fallocate a small region so
3606                  * just write it with zero.
3607                  */
3608                 if (len <= 1024 * 1024) {
3609                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3610                                                          off, len);
3611                         goto out;
3612                 }
3613
3614                 /*
3615                  * Check if falloc starts within first few pages of file
3616                  * and ends within a few pages of the end of file to
3617                  * ensure that most of file is being forced to be
3618                  * fallocated now. If so then setting whole file sparse
3619                  * ie potentially making a few extra pages at the beginning
3620                  * or end of the file non-sparse via set_sparse is harmless.
3621                  */
3622                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3623                         rc = -EOPNOTSUPP;
3624                         goto out;
3625                 }
3626         }
3627
3628         smb2_set_sparse(xid, tcon, cfile, inode, false);
3629         rc = 0;
3630
3631 out:
3632         if (rc)
3633                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3634                                 tcon->ses->Suid, off, len, rc);
3635         else
3636                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3637                                 tcon->ses->Suid, off, len);
3638
3639         free_xid(xid);
3640         return rc;
3641 }
3642
3643 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3644                             loff_t off, loff_t len)
3645 {
3646         int rc;
3647         unsigned int xid;
3648         struct inode *inode = file_inode(file);
3649         struct cifsFileInfo *cfile = file->private_data;
3650         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3651         __le64 eof;
3652         loff_t old_eof;
3653
3654         xid = get_xid();
3655
3656         inode_lock(inode);
3657
3658         old_eof = i_size_read(inode);
3659         if ((off >= old_eof) ||
3660             off + len >= old_eof) {
3661                 rc = -EINVAL;
3662                 goto out;
3663         }
3664
3665         filemap_invalidate_lock(inode->i_mapping);
3666         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3667         if (rc < 0)
3668                 goto out_2;
3669
3670         truncate_pagecache_range(inode, off, old_eof);
3671
3672         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3673                                   old_eof - off - len, off);
3674         if (rc < 0)
3675                 goto out_2;
3676
3677         eof = cpu_to_le64(old_eof - len);
3678         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3679                           cfile->fid.volatile_fid, cfile->pid, &eof);
3680         if (rc < 0)
3681                 goto out_2;
3682
3683         rc = 0;
3684
3685         cifsi->server_eof = i_size_read(inode) - len;
3686         truncate_setsize(inode, cifsi->server_eof);
3687         fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3688 out_2:
3689         filemap_invalidate_unlock(inode->i_mapping);
3690  out:
3691         inode_unlock(inode);
3692         free_xid(xid);
3693         return rc;
3694 }
3695
3696 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3697                               loff_t off, loff_t len)
3698 {
3699         int rc;
3700         unsigned int xid;
3701         struct cifsFileInfo *cfile = file->private_data;
3702         struct inode *inode = file_inode(file);
3703         __le64 eof;
3704         __u64  count, old_eof;
3705
3706         xid = get_xid();
3707
3708         inode_lock(inode);
3709
3710         old_eof = i_size_read(inode);
3711         if (off >= old_eof) {
3712                 rc = -EINVAL;
3713                 goto out;
3714         }
3715
3716         count = old_eof - off;
3717         eof = cpu_to_le64(old_eof + len);
3718
3719         filemap_invalidate_lock(inode->i_mapping);
3720         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3721         if (rc < 0)
3722                 goto out_2;
3723         truncate_pagecache_range(inode, off, old_eof);
3724
3725         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3726                           cfile->fid.volatile_fid, cfile->pid, &eof);
3727         if (rc < 0)
3728                 goto out_2;
3729
3730         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3731         if (rc < 0)
3732                 goto out_2;
3733
3734         rc = smb3_zero_data(file, tcon, off, len, xid);
3735         if (rc < 0)
3736                 goto out_2;
3737
3738         rc = 0;
3739 out_2:
3740         filemap_invalidate_unlock(inode->i_mapping);
3741  out:
3742         inode_unlock(inode);
3743         free_xid(xid);
3744         return rc;
3745 }
3746
3747 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3748 {
3749         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3750         struct cifsInodeInfo *cifsi;
3751         struct inode *inode;
3752         int rc = 0;
3753         struct file_allocated_range_buffer in_data, *out_data = NULL;
3754         u32 out_data_len;
3755         unsigned int xid;
3756
3757         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3758                 return generic_file_llseek(file, offset, whence);
3759
3760         inode = d_inode(cfile->dentry);
3761         cifsi = CIFS_I(inode);
3762
3763         if (offset < 0 || offset >= i_size_read(inode))
3764                 return -ENXIO;
3765
3766         xid = get_xid();
3767         /*
3768          * We need to be sure that all dirty pages are written as they
3769          * might fill holes on the server.
3770          * Note that we also MUST flush any written pages since at least
3771          * some servers (Windows2016) will not reflect recent writes in
3772          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3773          */
3774         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3775         if (wrcfile) {
3776                 filemap_write_and_wait(inode->i_mapping);
3777                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3778                 cifsFileInfo_put(wrcfile);
3779         }
3780
3781         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3782                 if (whence == SEEK_HOLE)
3783                         offset = i_size_read(inode);
3784                 goto lseek_exit;
3785         }
3786
3787         in_data.file_offset = cpu_to_le64(offset);
3788         in_data.length = cpu_to_le64(i_size_read(inode));
3789
3790         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3791                         cfile->fid.volatile_fid,
3792                         FSCTL_QUERY_ALLOCATED_RANGES,
3793                         (char *)&in_data, sizeof(in_data),
3794                         sizeof(struct file_allocated_range_buffer),
3795                         (char **)&out_data, &out_data_len);
3796         if (rc == -E2BIG)
3797                 rc = 0;
3798         if (rc)
3799                 goto lseek_exit;
3800
3801         if (whence == SEEK_HOLE && out_data_len == 0)
3802                 goto lseek_exit;
3803
3804         if (whence == SEEK_DATA && out_data_len == 0) {
3805                 rc = -ENXIO;
3806                 goto lseek_exit;
3807         }
3808
3809         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3810                 rc = -EINVAL;
3811                 goto lseek_exit;
3812         }
3813         if (whence == SEEK_DATA) {
3814                 offset = le64_to_cpu(out_data->file_offset);
3815                 goto lseek_exit;
3816         }
3817         if (offset < le64_to_cpu(out_data->file_offset))
3818                 goto lseek_exit;
3819
3820         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3821
3822  lseek_exit:
3823         free_xid(xid);
3824         kfree(out_data);
3825         if (!rc)
3826                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3827         else
3828                 return rc;
3829 }
3830
3831 static int smb3_fiemap(struct cifs_tcon *tcon,
3832                        struct cifsFileInfo *cfile,
3833                        struct fiemap_extent_info *fei, u64 start, u64 len)
3834 {
3835         unsigned int xid;
3836         struct file_allocated_range_buffer in_data, *out_data;
3837         u32 out_data_len;
3838         int i, num, rc, flags, last_blob;
3839         u64 next;
3840
3841         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3842         if (rc)
3843                 return rc;
3844
3845         xid = get_xid();
3846  again:
3847         in_data.file_offset = cpu_to_le64(start);
3848         in_data.length = cpu_to_le64(len);
3849
3850         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3851                         cfile->fid.volatile_fid,
3852                         FSCTL_QUERY_ALLOCATED_RANGES,
3853                         (char *)&in_data, sizeof(in_data),
3854                         1024 * sizeof(struct file_allocated_range_buffer),
3855                         (char **)&out_data, &out_data_len);
3856         if (rc == -E2BIG) {
3857                 last_blob = 0;
3858                 rc = 0;
3859         } else
3860                 last_blob = 1;
3861         if (rc)
3862                 goto out;
3863
3864         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3865                 rc = -EINVAL;
3866                 goto out;
3867         }
3868         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3869                 rc = -EINVAL;
3870                 goto out;
3871         }
3872
3873         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3874         for (i = 0; i < num; i++) {
3875                 flags = 0;
3876                 if (i == num - 1 && last_blob)
3877                         flags |= FIEMAP_EXTENT_LAST;
3878
3879                 rc = fiemap_fill_next_extent(fei,
3880                                 le64_to_cpu(out_data[i].file_offset),
3881                                 le64_to_cpu(out_data[i].file_offset),
3882                                 le64_to_cpu(out_data[i].length),
3883                                 flags);
3884                 if (rc < 0)
3885                         goto out;
3886                 if (rc == 1) {
3887                         rc = 0;
3888                         goto out;
3889                 }
3890         }
3891
3892         if (!last_blob) {
3893                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3894                   le64_to_cpu(out_data[num - 1].length);
3895                 len = len - (next - start);
3896                 start = next;
3897                 goto again;
3898         }
3899
3900  out:
3901         free_xid(xid);
3902         kfree(out_data);
3903         return rc;
3904 }
3905
3906 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3907                            loff_t off, loff_t len)
3908 {
3909         /* KEEP_SIZE already checked for by do_fallocate */
3910         if (mode & FALLOC_FL_PUNCH_HOLE)
3911                 return smb3_punch_hole(file, tcon, off, len);
3912         else if (mode & FALLOC_FL_ZERO_RANGE) {
3913                 if (mode & FALLOC_FL_KEEP_SIZE)
3914                         return smb3_zero_range(file, tcon, off, len, true);
3915                 return smb3_zero_range(file, tcon, off, len, false);
3916         } else if (mode == FALLOC_FL_KEEP_SIZE)
3917                 return smb3_simple_falloc(file, tcon, off, len, true);
3918         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3919                 return smb3_collapse_range(file, tcon, off, len);
3920         else if (mode == FALLOC_FL_INSERT_RANGE)
3921                 return smb3_insert_range(file, tcon, off, len);
3922         else if (mode == 0)
3923                 return smb3_simple_falloc(file, tcon, off, len, false);
3924
3925         return -EOPNOTSUPP;
3926 }
3927
3928 static void
3929 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3930                       struct cifsInodeInfo *cinode, __u32 oplock,
3931                       unsigned int epoch, bool *purge_cache)
3932 {
3933         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3934 }
3935
3936 static void
3937 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3938                        unsigned int epoch, bool *purge_cache);
3939
3940 static void
3941 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3942                        struct cifsInodeInfo *cinode, __u32 oplock,
3943                        unsigned int epoch, bool *purge_cache)
3944 {
3945         unsigned int old_state = cinode->oplock;
3946         unsigned int old_epoch = cinode->epoch;
3947         unsigned int new_state;
3948
3949         if (epoch > old_epoch) {
3950                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3951                 cinode->epoch = epoch;
3952         }
3953
3954         new_state = cinode->oplock;
3955         *purge_cache = false;
3956
3957         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3958             (new_state & CIFS_CACHE_READ_FLG) == 0)
3959                 *purge_cache = true;
3960         else if (old_state == new_state && (epoch - old_epoch > 1))
3961                 *purge_cache = true;
3962 }
3963
3964 static void
3965 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3966                       unsigned int epoch, bool *purge_cache)
3967 {
3968         oplock &= 0xFF;
3969         cinode->lease_granted = false;
3970         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3971                 return;
3972         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3973                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3974                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3975                          &cinode->netfs.inode);
3976         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3977                 cinode->oplock = CIFS_CACHE_RW_FLG;
3978                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3979                          &cinode->netfs.inode);
3980         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3981                 cinode->oplock = CIFS_CACHE_READ_FLG;
3982                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3983                          &cinode->netfs.inode);
3984         } else
3985                 cinode->oplock = 0;
3986 }
3987
3988 static void
3989 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3990                        unsigned int epoch, bool *purge_cache)
3991 {
3992         char message[5] = {0};
3993         unsigned int new_oplock = 0;
3994
3995         oplock &= 0xFF;
3996         cinode->lease_granted = true;
3997         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3998                 return;
3999
4000         /* Check if the server granted an oplock rather than a lease */
4001         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4002                 return smb2_set_oplock_level(cinode, oplock, epoch,
4003                                              purge_cache);
4004
4005         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4006                 new_oplock |= CIFS_CACHE_READ_FLG;
4007                 strcat(message, "R");
4008         }
4009         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4010                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4011                 strcat(message, "H");
4012         }
4013         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4014                 new_oplock |= CIFS_CACHE_WRITE_FLG;
4015                 strcat(message, "W");
4016         }
4017         if (!new_oplock)
4018                 strncpy(message, "None", sizeof(message));
4019
4020         cinode->oplock = new_oplock;
4021         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4022                  &cinode->netfs.inode);
4023 }
4024
4025 static void
4026 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4027                       unsigned int epoch, bool *purge_cache)
4028 {
4029         unsigned int old_oplock = cinode->oplock;
4030
4031         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4032
4033         if (purge_cache) {
4034                 *purge_cache = false;
4035                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4036                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4037                             (epoch - cinode->epoch > 0))
4038                                 *purge_cache = true;
4039                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4040                                  (epoch - cinode->epoch > 1))
4041                                 *purge_cache = true;
4042                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4043                                  (epoch - cinode->epoch > 1))
4044                                 *purge_cache = true;
4045                         else if (cinode->oplock == 0 &&
4046                                  (epoch - cinode->epoch > 0))
4047                                 *purge_cache = true;
4048                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4049                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4050                             (epoch - cinode->epoch > 0))
4051                                 *purge_cache = true;
4052                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4053                                  (epoch - cinode->epoch > 1))
4054                                 *purge_cache = true;
4055                 }
4056                 cinode->epoch = epoch;
4057         }
4058 }
4059
4060 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4061 static bool
4062 smb2_is_read_op(__u32 oplock)
4063 {
4064         return oplock == SMB2_OPLOCK_LEVEL_II;
4065 }
4066 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4067
4068 static bool
4069 smb21_is_read_op(__u32 oplock)
4070 {
4071         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4072                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4073 }
4074
4075 static __le32
4076 map_oplock_to_lease(u8 oplock)
4077 {
4078         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4079                 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4080         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4081                 return SMB2_LEASE_READ_CACHING_LE;
4082         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4083                 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4084                        SMB2_LEASE_WRITE_CACHING_LE;
4085         return 0;
4086 }
4087
4088 static char *
4089 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4090 {
4091         struct create_lease *buf;
4092
4093         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4094         if (!buf)
4095                 return NULL;
4096
4097         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4098         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4099
4100         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4101                                         (struct create_lease, lcontext));
4102         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4103         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4104                                 (struct create_lease, Name));
4105         buf->ccontext.NameLength = cpu_to_le16(4);
4106         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4107         buf->Name[0] = 'R';
4108         buf->Name[1] = 'q';
4109         buf->Name[2] = 'L';
4110         buf->Name[3] = 's';
4111         return (char *)buf;
4112 }
4113
4114 static char *
4115 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4116 {
4117         struct create_lease_v2 *buf;
4118
4119         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4120         if (!buf)
4121                 return NULL;
4122
4123         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4124         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4125
4126         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4127                                         (struct create_lease_v2, lcontext));
4128         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4129         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4130                                 (struct create_lease_v2, Name));
4131         buf->ccontext.NameLength = cpu_to_le16(4);
4132         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4133         buf->Name[0] = 'R';
4134         buf->Name[1] = 'q';
4135         buf->Name[2] = 'L';
4136         buf->Name[3] = 's';
4137         return (char *)buf;
4138 }
4139
4140 static __u8
4141 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4142 {
4143         struct create_lease *lc = (struct create_lease *)buf;
4144
4145         *epoch = 0; /* not used */
4146         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4147                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4148         return le32_to_cpu(lc->lcontext.LeaseState);
4149 }
4150
4151 static __u8
4152 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4153 {
4154         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4155
4156         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4157         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4158                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4159         if (lease_key)
4160                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4161         return le32_to_cpu(lc->lcontext.LeaseState);
4162 }
4163
4164 static unsigned int
4165 smb2_wp_retry_size(struct inode *inode)
4166 {
4167         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4168                      SMB2_MAX_BUFFER_SIZE);
4169 }
4170
4171 static bool
4172 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4173 {
4174         return !cfile->invalidHandle;
4175 }
4176
4177 static void
4178 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4179                    struct smb_rqst *old_rq, __le16 cipher_type)
4180 {
4181         struct smb2_hdr *shdr =
4182                         (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4183
4184         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4185         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4186         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4187         tr_hdr->Flags = cpu_to_le16(0x01);
4188         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4189             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4190                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4191         else
4192                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4193         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4194 }
4195
4196 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4197                                  int num_rqst, const u8 *sig, u8 **iv,
4198                                  struct aead_request **req, struct sg_table *sgt,
4199                                  unsigned int *num_sgs, size_t *sensitive_size)
4200 {
4201         unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4202         unsigned int iv_size = crypto_aead_ivsize(tfm);
4203         unsigned int len;
4204         u8 *p;
4205
4206         *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4207         if (IS_ERR_VALUE((long)(int)*num_sgs))
4208                 return ERR_PTR(*num_sgs);
4209
4210         len = iv_size;
4211         len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4212         len = ALIGN(len, crypto_tfm_ctx_alignment());
4213         len += req_size;
4214         len = ALIGN(len, __alignof__(struct scatterlist));
4215         len += array_size(*num_sgs, sizeof(struct scatterlist));
4216         *sensitive_size = len;
4217
4218         p = kvzalloc(len, GFP_NOFS);
4219         if (!p)
4220                 return ERR_PTR(-ENOMEM);
4221
4222         *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4223         *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4224                                                 crypto_tfm_ctx_alignment());
4225         sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4226                                                    __alignof__(struct scatterlist));
4227         return p;
4228 }
4229
4230 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4231                                int num_rqst, const u8 *sig, u8 **iv,
4232                                struct aead_request **req, struct scatterlist **sgl,
4233                                size_t *sensitive_size)
4234 {
4235         struct sg_table sgtable = {};
4236         unsigned int skip, num_sgs, i, j;
4237         ssize_t rc;
4238         void *p;
4239
4240         p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4241                                 &num_sgs, sensitive_size);
4242         if (IS_ERR(p))
4243                 return ERR_CAST(p);
4244
4245         sg_init_marker(sgtable.sgl, num_sgs);
4246
4247         /*
4248          * The first rqst has a transform header where the
4249          * first 20 bytes are not part of the encrypted blob.
4250          */
4251         skip = 20;
4252
4253         for (i = 0; i < num_rqst; i++) {
4254                 struct iov_iter *iter = &rqst[i].rq_iter;
4255                 size_t count = iov_iter_count(iter);
4256
4257                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4258                         cifs_sg_set_buf(&sgtable,
4259                                         rqst[i].rq_iov[j].iov_base + skip,
4260                                         rqst[i].rq_iov[j].iov_len - skip);
4261
4262                         /* See the above comment on the 'skip' assignment */
4263                         skip = 0;
4264                 }
4265                 sgtable.orig_nents = sgtable.nents;
4266
4267                 rc = extract_iter_to_sg(iter, count, &sgtable,
4268                                         num_sgs - sgtable.nents, 0);
4269                 iov_iter_revert(iter, rc);
4270                 sgtable.orig_nents = sgtable.nents;
4271         }
4272
4273         cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4274         sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4275         *sgl = sgtable.sgl;
4276         return p;
4277 }
4278
4279 static int
4280 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4281 {
4282         struct TCP_Server_Info *pserver;
4283         struct cifs_ses *ses;
4284         u8 *ses_enc_key;
4285
4286         /* If server is a channel, select the primary channel */
4287         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4288
4289         spin_lock(&cifs_tcp_ses_lock);
4290         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4291                 if (ses->Suid == ses_id) {
4292                         spin_lock(&ses->ses_lock);
4293                         ses_enc_key = enc ? ses->smb3encryptionkey :
4294                                 ses->smb3decryptionkey;
4295                         memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4296                         spin_unlock(&ses->ses_lock);
4297                         spin_unlock(&cifs_tcp_ses_lock);
4298                         return 0;
4299                 }
4300         }
4301         spin_unlock(&cifs_tcp_ses_lock);
4302
4303         trace_smb3_ses_not_found(ses_id);
4304
4305         return -EAGAIN;
4306 }
4307 /*
4308  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4309  * iov[0]   - transform header (associate data),
4310  * iov[1-N] - SMB2 header and pages - data to encrypt.
4311  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4312  * untouched.
4313  */
4314 static int
4315 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4316               struct smb_rqst *rqst, int enc)
4317 {
4318         struct smb2_transform_hdr *tr_hdr =
4319                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4320         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4321         int rc = 0;
4322         struct scatterlist *sg;
4323         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4324         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4325         struct aead_request *req;
4326         u8 *iv;
4327         DECLARE_CRYPTO_WAIT(wait);
4328         struct crypto_aead *tfm;
4329         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4330         void *creq;
4331         size_t sensitive_size;
4332
4333         rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4334         if (rc) {
4335                 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4336                          enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4337                 return rc;
4338         }
4339
4340         rc = smb3_crypto_aead_allocate(server);
4341         if (rc) {
4342                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4343                 return rc;
4344         }
4345
4346         tfm = enc ? server->secmech.enc : server->secmech.dec;
4347
4348         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4349                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4350                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4351         else
4352                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4353
4354         if (rc) {
4355                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4356                 return rc;
4357         }
4358
4359         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4360         if (rc) {
4361                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4362                 return rc;
4363         }
4364
4365         creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4366                                  &sensitive_size);
4367         if (IS_ERR(creq))
4368                 return PTR_ERR(creq);
4369
4370         if (!enc) {
4371                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4372                 crypt_len += SMB2_SIGNATURE_SIZE;
4373         }
4374
4375         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4376             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4377                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4378         else {
4379                 iv[0] = 3;
4380                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4381         }
4382
4383         aead_request_set_tfm(req, tfm);
4384         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4385         aead_request_set_ad(req, assoc_data_len);
4386
4387         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4388                                   crypto_req_done, &wait);
4389
4390         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4391                                 : crypto_aead_decrypt(req), &wait);
4392
4393         if (!rc && enc)
4394                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4395
4396         kvfree_sensitive(creq, sensitive_size);
4397         return rc;
4398 }
4399
4400 /*
4401  * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4402  */
4403 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4404 {
4405         struct folio *folio;
4406
4407         XA_STATE(xas, buffer, 0);
4408
4409         rcu_read_lock();
4410         xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4411                 folio_put(folio);
4412         }
4413         rcu_read_unlock();
4414         xa_destroy(buffer);
4415 }
4416
4417 void
4418 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4419 {
4420         int i;
4421
4422         for (i = 0; i < num_rqst; i++)
4423                 if (!xa_empty(&rqst[i].rq_buffer))
4424                         cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4425 }
4426
4427 /*
4428  * This function will initialize new_rq and encrypt the content.
4429  * The first entry, new_rq[0], only contains a single iov which contains
4430  * a smb2_transform_hdr and is pre-allocated by the caller.
4431  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4432  *
4433  * The end result is an array of smb_rqst structures where the first structure
4434  * only contains a single iov for the transform header which we then can pass
4435  * to crypt_message().
4436  *
4437  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4438  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4439  */
4440 static int
4441 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4442                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4443 {
4444         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4445         struct page *page;
4446         unsigned int orig_len = 0;
4447         int i, j;
4448         int rc = -ENOMEM;
4449
4450         for (i = 1; i < num_rqst; i++) {
4451                 struct smb_rqst *old = &old_rq[i - 1];
4452                 struct smb_rqst *new = &new_rq[i];
4453                 struct xarray *buffer = &new->rq_buffer;
4454                 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4455
4456                 orig_len += smb_rqst_len(server, old);
4457                 new->rq_iov = old->rq_iov;
4458                 new->rq_nvec = old->rq_nvec;
4459
4460                 xa_init(buffer);
4461
4462                 if (size > 0) {
4463                         unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4464
4465                         for (j = 0; j < npages; j++) {
4466                                 void *o;
4467
4468                                 rc = -ENOMEM;
4469                                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4470                                 if (!page)
4471                                         goto err_free;
4472                                 page->index = j;
4473                                 o = xa_store(buffer, j, page, GFP_KERNEL);
4474                                 if (xa_is_err(o)) {
4475                                         rc = xa_err(o);
4476                                         put_page(page);
4477                                         goto err_free;
4478                                 }
4479
4480                                 xa_set_mark(buffer, j, XA_MARK_0);
4481
4482                                 seg = min_t(size_t, size - copied, PAGE_SIZE);
4483                                 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4484                                         rc = -EFAULT;
4485                                         goto err_free;
4486                                 }
4487                                 copied += seg;
4488                         }
4489                         iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4490                                         buffer, 0, size);
4491                         new->rq_iter_size = size;
4492                 }
4493         }
4494
4495         /* fill the 1st iov with a transform header */
4496         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4497
4498         rc = crypt_message(server, num_rqst, new_rq, 1);
4499         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4500         if (rc)
4501                 goto err_free;
4502
4503         return rc;
4504
4505 err_free:
4506         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4507         return rc;
4508 }
4509
4510 static int
4511 smb3_is_transform_hdr(void *buf)
4512 {
4513         struct smb2_transform_hdr *trhdr = buf;
4514
4515         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4516 }
4517
4518 static int
4519 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4520                  unsigned int buf_data_size, struct iov_iter *iter,
4521                  bool is_offloaded)
4522 {
4523         struct kvec iov[2];
4524         struct smb_rqst rqst = {NULL};
4525         size_t iter_size = 0;
4526         int rc;
4527
4528         iov[0].iov_base = buf;
4529         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4530         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4531         iov[1].iov_len = buf_data_size;
4532
4533         rqst.rq_iov = iov;
4534         rqst.rq_nvec = 2;
4535         if (iter) {
4536                 rqst.rq_iter = *iter;
4537                 rqst.rq_iter_size = iov_iter_count(iter);
4538                 iter_size = iov_iter_count(iter);
4539         }
4540
4541         rc = crypt_message(server, 1, &rqst, 0);
4542         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4543
4544         if (rc)
4545                 return rc;
4546
4547         memmove(buf, iov[1].iov_base, buf_data_size);
4548
4549         if (!is_offloaded)
4550                 server->total_read = buf_data_size + iter_size;
4551
4552         return rc;
4553 }
4554
4555 static int
4556 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4557                         unsigned int skip, struct iov_iter *iter)
4558 {
4559         struct page *page;
4560         unsigned long index;
4561
4562         xa_for_each(pages, index, page) {
4563                 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4564
4565                 n = copy_page_to_iter(page, skip, len, iter);
4566                 if (n != len) {
4567                         cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4568                         return -EIO;
4569                 }
4570                 data_size -= n;
4571                 skip = 0;
4572         }
4573
4574         return 0;
4575 }
4576
4577 static int
4578 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4579                  char *buf, unsigned int buf_len, struct xarray *pages,
4580                  unsigned int pages_len, bool is_offloaded)
4581 {
4582         unsigned int data_offset;
4583         unsigned int data_len;
4584         unsigned int cur_off;
4585         unsigned int cur_page_idx;
4586         unsigned int pad_len;
4587         struct cifs_readdata *rdata = mid->callback_data;
4588         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4589         int length;
4590         bool use_rdma_mr = false;
4591
4592         if (shdr->Command != SMB2_READ) {
4593                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4594                 return -EOPNOTSUPP;
4595         }
4596
4597         if (server->ops->is_session_expired &&
4598             server->ops->is_session_expired(buf)) {
4599                 if (!is_offloaded)
4600                         cifs_reconnect(server, true);
4601                 return -1;
4602         }
4603
4604         if (server->ops->is_status_pending &&
4605                         server->ops->is_status_pending(buf, server))
4606                 return -1;
4607
4608         /* set up first two iov to get credits */
4609         rdata->iov[0].iov_base = buf;
4610         rdata->iov[0].iov_len = 0;
4611         rdata->iov[1].iov_base = buf;
4612         rdata->iov[1].iov_len =
4613                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4614         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4615                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4616         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4617                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4618
4619         rdata->result = server->ops->map_error(buf, true);
4620         if (rdata->result != 0) {
4621                 cifs_dbg(FYI, "%s: server returned error %d\n",
4622                          __func__, rdata->result);
4623                 /* normal error on read response */
4624                 if (is_offloaded)
4625                         mid->mid_state = MID_RESPONSE_RECEIVED;
4626                 else
4627                         dequeue_mid(mid, false);
4628                 return 0;
4629         }
4630
4631         data_offset = server->ops->read_data_offset(buf);
4632 #ifdef CONFIG_CIFS_SMB_DIRECT
4633         use_rdma_mr = rdata->mr;
4634 #endif
4635         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4636
4637         if (data_offset < server->vals->read_rsp_size) {
4638                 /*
4639                  * win2k8 sometimes sends an offset of 0 when the read
4640                  * is beyond the EOF. Treat it as if the data starts just after
4641                  * the header.
4642                  */
4643                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4644                          __func__, data_offset);
4645                 data_offset = server->vals->read_rsp_size;
4646         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4647                 /* data_offset is beyond the end of smallbuf */
4648                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4649                          __func__, data_offset);
4650                 rdata->result = -EIO;
4651                 if (is_offloaded)
4652                         mid->mid_state = MID_RESPONSE_MALFORMED;
4653                 else
4654                         dequeue_mid(mid, rdata->result);
4655                 return 0;
4656         }
4657
4658         pad_len = data_offset - server->vals->read_rsp_size;
4659
4660         if (buf_len <= data_offset) {
4661                 /* read response payload is in pages */
4662                 cur_page_idx = pad_len / PAGE_SIZE;
4663                 cur_off = pad_len % PAGE_SIZE;
4664
4665                 if (cur_page_idx != 0) {
4666                         /* data offset is beyond the 1st page of response */
4667                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4668                                  __func__, data_offset);
4669                         rdata->result = -EIO;
4670                         if (is_offloaded)
4671                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4672                         else
4673                                 dequeue_mid(mid, rdata->result);
4674                         return 0;
4675                 }
4676
4677                 if (data_len > pages_len - pad_len) {
4678                         /* data_len is corrupt -- discard frame */
4679                         rdata->result = -EIO;
4680                         if (is_offloaded)
4681                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4682                         else
4683                                 dequeue_mid(mid, rdata->result);
4684                         return 0;
4685                 }
4686
4687                 /* Copy the data to the output I/O iterator. */
4688                 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4689                                                         cur_off, &rdata->iter);
4690                 if (rdata->result != 0) {
4691                         if (is_offloaded)
4692                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4693                         else
4694                                 dequeue_mid(mid, rdata->result);
4695                         return 0;
4696                 }
4697                 rdata->got_bytes = pages_len;
4698
4699         } else if (buf_len >= data_offset + data_len) {
4700                 /* read response payload is in buf */
4701                 WARN_ONCE(pages && !xa_empty(pages),
4702                           "read data can be either in buf or in pages");
4703                 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4704                 if (length < 0)
4705                         return length;
4706                 rdata->got_bytes = data_len;
4707         } else {
4708                 /* read response payload cannot be in both buf and pages */
4709                 WARN_ONCE(1, "buf can not contain only a part of read data");
4710                 rdata->result = -EIO;
4711                 if (is_offloaded)
4712                         mid->mid_state = MID_RESPONSE_MALFORMED;
4713                 else
4714                         dequeue_mid(mid, rdata->result);
4715                 return 0;
4716         }
4717
4718         if (is_offloaded)
4719                 mid->mid_state = MID_RESPONSE_RECEIVED;
4720         else
4721                 dequeue_mid(mid, false);
4722         return 0;
4723 }
4724
4725 struct smb2_decrypt_work {
4726         struct work_struct decrypt;
4727         struct TCP_Server_Info *server;
4728         struct xarray buffer;
4729         char *buf;
4730         unsigned int len;
4731 };
4732
4733
4734 static void smb2_decrypt_offload(struct work_struct *work)
4735 {
4736         struct smb2_decrypt_work *dw = container_of(work,
4737                                 struct smb2_decrypt_work, decrypt);
4738         int rc;
4739         struct mid_q_entry *mid;
4740         struct iov_iter iter;
4741
4742         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4743         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4744                               &iter, true);
4745         if (rc) {
4746                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4747                 goto free_pages;
4748         }
4749
4750         dw->server->lstrp = jiffies;
4751         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4752         if (mid == NULL)
4753                 cifs_dbg(FYI, "mid not found\n");
4754         else {
4755                 mid->decrypted = true;
4756                 rc = handle_read_data(dw->server, mid, dw->buf,
4757                                       dw->server->vals->read_rsp_size,
4758                                       &dw->buffer, dw->len,
4759                                       true);
4760                 if (rc >= 0) {
4761 #ifdef CONFIG_CIFS_STATS2
4762                         mid->when_received = jiffies;
4763 #endif
4764                         if (dw->server->ops->is_network_name_deleted)
4765                                 dw->server->ops->is_network_name_deleted(dw->buf,
4766                                                                          dw->server);
4767
4768                         mid->callback(mid);
4769                 } else {
4770                         spin_lock(&dw->server->srv_lock);
4771                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4772                                 spin_lock(&dw->server->mid_lock);
4773                                 mid->mid_state = MID_RETRY_NEEDED;
4774                                 spin_unlock(&dw->server->mid_lock);
4775                                 spin_unlock(&dw->server->srv_lock);
4776                                 mid->callback(mid);
4777                         } else {
4778                                 spin_lock(&dw->server->mid_lock);
4779                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4780                                 mid->mid_flags &= ~(MID_DELETED);
4781                                 list_add_tail(&mid->qhead,
4782                                         &dw->server->pending_mid_q);
4783                                 spin_unlock(&dw->server->mid_lock);
4784                                 spin_unlock(&dw->server->srv_lock);
4785                         }
4786                 }
4787                 release_mid(mid);
4788         }
4789
4790 free_pages:
4791         cifs_clear_xarray_buffer(&dw->buffer);
4792         cifs_small_buf_release(dw->buf);
4793         kfree(dw);
4794 }
4795
4796
4797 static int
4798 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4799                        int *num_mids)
4800 {
4801         struct page *page;
4802         char *buf = server->smallbuf;
4803         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4804         struct iov_iter iter;
4805         unsigned int len, npages;
4806         unsigned int buflen = server->pdu_size;
4807         int rc;
4808         int i = 0;
4809         struct smb2_decrypt_work *dw;
4810
4811         dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4812         if (!dw)
4813                 return -ENOMEM;
4814         xa_init(&dw->buffer);
4815         INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4816         dw->server = server;
4817
4818         *num_mids = 1;
4819         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4820                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4821
4822         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4823         if (rc < 0)
4824                 goto free_dw;
4825         server->total_read += rc;
4826
4827         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4828                 server->vals->read_rsp_size;
4829         dw->len = len;
4830         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4831
4832         rc = -ENOMEM;
4833         for (; i < npages; i++) {
4834                 void *old;
4835
4836                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4837                 if (!page)
4838                         goto discard_data;
4839                 page->index = i;
4840                 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4841                 if (xa_is_err(old)) {
4842                         rc = xa_err(old);
4843                         put_page(page);
4844                         goto discard_data;
4845                 }
4846                 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4847         }
4848
4849         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4850
4851         /* Read the data into the buffer and clear excess bufferage. */
4852         rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4853         if (rc < 0)
4854                 goto discard_data;
4855
4856         server->total_read += rc;
4857         if (rc < npages * PAGE_SIZE)
4858                 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4859         iov_iter_revert(&iter, npages * PAGE_SIZE);
4860         iov_iter_truncate(&iter, dw->len);
4861
4862         rc = cifs_discard_remaining_data(server);
4863         if (rc)
4864                 goto free_pages;
4865
4866         /*
4867          * For large reads, offload to different thread for better performance,
4868          * use more cores decrypting which can be expensive
4869          */
4870
4871         if ((server->min_offload) && (server->in_flight > 1) &&
4872             (server->pdu_size >= server->min_offload)) {
4873                 dw->buf = server->smallbuf;
4874                 server->smallbuf = (char *)cifs_small_buf_get();
4875
4876                 queue_work(decrypt_wq, &dw->decrypt);
4877                 *num_mids = 0; /* worker thread takes care of finding mid */
4878                 return -1;
4879         }
4880
4881         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4882                               &iter, false);
4883         if (rc)
4884                 goto free_pages;
4885
4886         *mid = smb2_find_mid(server, buf);
4887         if (*mid == NULL) {
4888                 cifs_dbg(FYI, "mid not found\n");
4889         } else {
4890                 cifs_dbg(FYI, "mid found\n");
4891                 (*mid)->decrypted = true;
4892                 rc = handle_read_data(server, *mid, buf,
4893                                       server->vals->read_rsp_size,
4894                                       &dw->buffer, dw->len, false);
4895                 if (rc >= 0) {
4896                         if (server->ops->is_network_name_deleted) {
4897                                 server->ops->is_network_name_deleted(buf,
4898                                                                 server);
4899                         }
4900                 }
4901         }
4902
4903 free_pages:
4904         cifs_clear_xarray_buffer(&dw->buffer);
4905 free_dw:
4906         kfree(dw);
4907         return rc;
4908 discard_data:
4909         cifs_discard_remaining_data(server);
4910         goto free_pages;
4911 }
4912
4913 static int
4914 receive_encrypted_standard(struct TCP_Server_Info *server,
4915                            struct mid_q_entry **mids, char **bufs,
4916                            int *num_mids)
4917 {
4918         int ret, length;
4919         char *buf = server->smallbuf;
4920         struct smb2_hdr *shdr;
4921         unsigned int pdu_length = server->pdu_size;
4922         unsigned int buf_size;
4923         struct mid_q_entry *mid_entry;
4924         int next_is_large;
4925         char *next_buffer = NULL;
4926
4927         *num_mids = 0;
4928
4929         /* switch to large buffer if too big for a small one */
4930         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4931                 server->large_buf = true;
4932                 memcpy(server->bigbuf, buf, server->total_read);
4933                 buf = server->bigbuf;
4934         }
4935
4936         /* now read the rest */
4937         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4938                                 pdu_length - HEADER_SIZE(server) + 1);
4939         if (length < 0)
4940                 return length;
4941         server->total_read += length;
4942
4943         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4944         length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4945         if (length)
4946                 return length;
4947
4948         next_is_large = server->large_buf;
4949 one_more:
4950         shdr = (struct smb2_hdr *)buf;
4951         if (shdr->NextCommand) {
4952                 if (next_is_large)
4953                         next_buffer = (char *)cifs_buf_get();
4954                 else
4955                         next_buffer = (char *)cifs_small_buf_get();
4956                 memcpy(next_buffer,
4957                        buf + le32_to_cpu(shdr->NextCommand),
4958                        pdu_length - le32_to_cpu(shdr->NextCommand));
4959         }
4960
4961         mid_entry = smb2_find_mid(server, buf);
4962         if (mid_entry == NULL)
4963                 cifs_dbg(FYI, "mid not found\n");
4964         else {
4965                 cifs_dbg(FYI, "mid found\n");
4966                 mid_entry->decrypted = true;
4967                 mid_entry->resp_buf_size = server->pdu_size;
4968         }
4969
4970         if (*num_mids >= MAX_COMPOUND) {
4971                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4972                 return -1;
4973         }
4974         bufs[*num_mids] = buf;
4975         mids[(*num_mids)++] = mid_entry;
4976
4977         if (mid_entry && mid_entry->handle)
4978                 ret = mid_entry->handle(server, mid_entry);
4979         else
4980                 ret = cifs_handle_standard(server, mid_entry);
4981
4982         if (ret == 0 && shdr->NextCommand) {
4983                 pdu_length -= le32_to_cpu(shdr->NextCommand);
4984                 server->large_buf = next_is_large;
4985                 if (next_is_large)
4986                         server->bigbuf = buf = next_buffer;
4987                 else
4988                         server->smallbuf = buf = next_buffer;
4989                 goto one_more;
4990         } else if (ret != 0) {
4991                 /*
4992                  * ret != 0 here means that we didn't get to handle_mid() thus
4993                  * server->smallbuf and server->bigbuf are still valid. We need
4994                  * to free next_buffer because it is not going to be used
4995                  * anywhere.
4996                  */
4997                 if (next_is_large)
4998                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4999                 else
5000                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5001         }
5002
5003         return ret;
5004 }
5005
5006 static int
5007 smb3_receive_transform(struct TCP_Server_Info *server,
5008                        struct mid_q_entry **mids, char **bufs, int *num_mids)
5009 {
5010         char *buf = server->smallbuf;
5011         unsigned int pdu_length = server->pdu_size;
5012         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5013         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5014
5015         if (pdu_length < sizeof(struct smb2_transform_hdr) +
5016                                                 sizeof(struct smb2_hdr)) {
5017                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5018                          pdu_length);
5019                 cifs_reconnect(server, true);
5020                 return -ECONNABORTED;
5021         }
5022
5023         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5024                 cifs_server_dbg(VFS, "Transform message is broken\n");
5025                 cifs_reconnect(server, true);
5026                 return -ECONNABORTED;
5027         }
5028
5029         /* TODO: add support for compounds containing READ. */
5030         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5031                 return receive_encrypted_read(server, &mids[0], num_mids);
5032         }
5033
5034         return receive_encrypted_standard(server, mids, bufs, num_mids);
5035 }
5036
5037 int
5038 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5039 {
5040         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5041
5042         return handle_read_data(server, mid, buf, server->pdu_size,
5043                                 NULL, 0, false);
5044 }
5045
5046 static int
5047 smb2_next_header(char *buf)
5048 {
5049         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5050         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5051
5052         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5053                 return sizeof(struct smb2_transform_hdr) +
5054                   le32_to_cpu(t_hdr->OriginalMessageSize);
5055
5056         return le32_to_cpu(hdr->NextCommand);
5057 }
5058
5059 static int
5060 smb2_make_node(unsigned int xid, struct inode *inode,
5061                struct dentry *dentry, struct cifs_tcon *tcon,
5062                const char *full_path, umode_t mode, dev_t dev)
5063 {
5064         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5065         int rc = -EPERM;
5066         struct cifs_open_info_data buf = {};
5067         struct cifs_io_parms io_parms = {0};
5068         __u32 oplock = 0;
5069         struct cifs_fid fid;
5070         struct cifs_open_parms oparms;
5071         unsigned int bytes_written;
5072         struct win_dev *pdev;
5073         struct kvec iov[2];
5074
5075         /*
5076          * Check if mounted with mount parm 'sfu' mount parm.
5077          * SFU emulation should work with all servers, but only
5078          * supports block and char device (no socket & fifo),
5079          * and was used by default in earlier versions of Windows
5080          */
5081         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5082                 return rc;
5083
5084         /*
5085          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5086          * their current NFS server) uses this approach to expose special files
5087          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5088          */
5089
5090         if (!S_ISCHR(mode) && !S_ISBLK(mode))
5091                 return rc;
5092
5093         cifs_dbg(FYI, "sfu compat create special file\n");
5094
5095         oparms = (struct cifs_open_parms) {
5096                 .tcon = tcon,
5097                 .cifs_sb = cifs_sb,
5098                 .desired_access = GENERIC_WRITE,
5099                 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5100                                                       CREATE_OPTION_SPECIAL),
5101                 .disposition = FILE_CREATE,
5102                 .path = full_path,
5103                 .fid = &fid,
5104         };
5105
5106         if (tcon->ses->server->oplocks)
5107                 oplock = REQ_OPLOCK;
5108         else
5109                 oplock = 0;
5110         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf);
5111         if (rc)
5112                 return rc;
5113
5114         /*
5115          * BB Do not bother to decode buf since no local inode yet to put
5116          * timestamps in, but we can reuse it safely.
5117          */
5118
5119         pdev = (struct win_dev *)&buf.fi;
5120         io_parms.pid = current->tgid;
5121         io_parms.tcon = tcon;
5122         io_parms.offset = 0;
5123         io_parms.length = sizeof(struct win_dev);
5124         iov[1].iov_base = &buf.fi;
5125         iov[1].iov_len = sizeof(struct win_dev);
5126         if (S_ISCHR(mode)) {
5127                 memcpy(pdev->type, "IntxCHR", 8);
5128                 pdev->major = cpu_to_le64(MAJOR(dev));
5129                 pdev->minor = cpu_to_le64(MINOR(dev));
5130                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5131                                                         &bytes_written, iov, 1);
5132         } else if (S_ISBLK(mode)) {
5133                 memcpy(pdev->type, "IntxBLK", 8);
5134                 pdev->major = cpu_to_le64(MAJOR(dev));
5135                 pdev->minor = cpu_to_le64(MINOR(dev));
5136                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5137                                                         &bytes_written, iov, 1);
5138         }
5139         tcon->ses->server->ops->close(xid, tcon, &fid);
5140         d_drop(dentry);
5141
5142         /* FIXME: add code here to set EAs */
5143
5144         cifs_free_open_info(&buf);
5145         return rc;
5146 }
5147
5148 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5149 struct smb_version_operations smb20_operations = {
5150         .compare_fids = smb2_compare_fids,
5151         .setup_request = smb2_setup_request,
5152         .setup_async_request = smb2_setup_async_request,
5153         .check_receive = smb2_check_receive,
5154         .add_credits = smb2_add_credits,
5155         .set_credits = smb2_set_credits,
5156         .get_credits_field = smb2_get_credits_field,
5157         .get_credits = smb2_get_credits,
5158         .wait_mtu_credits = cifs_wait_mtu_credits,
5159         .get_next_mid = smb2_get_next_mid,
5160         .revert_current_mid = smb2_revert_current_mid,
5161         .read_data_offset = smb2_read_data_offset,
5162         .read_data_length = smb2_read_data_length,
5163         .map_error = map_smb2_to_linux_error,
5164         .find_mid = smb2_find_mid,
5165         .check_message = smb2_check_message,
5166         .dump_detail = smb2_dump_detail,
5167         .clear_stats = smb2_clear_stats,
5168         .print_stats = smb2_print_stats,
5169         .is_oplock_break = smb2_is_valid_oplock_break,
5170         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5171         .downgrade_oplock = smb2_downgrade_oplock,
5172         .need_neg = smb2_need_neg,
5173         .negotiate = smb2_negotiate,
5174         .negotiate_wsize = smb2_negotiate_wsize,
5175         .negotiate_rsize = smb2_negotiate_rsize,
5176         .sess_setup = SMB2_sess_setup,
5177         .logoff = SMB2_logoff,
5178         .tree_connect = SMB2_tcon,
5179         .tree_disconnect = SMB2_tdis,
5180         .qfs_tcon = smb2_qfs_tcon,
5181         .is_path_accessible = smb2_is_path_accessible,
5182         .can_echo = smb2_can_echo,
5183         .echo = SMB2_echo,
5184         .query_path_info = smb2_query_path_info,
5185         .query_reparse_point = smb2_query_reparse_point,
5186         .get_srv_inum = smb2_get_srv_inum,
5187         .query_file_info = smb2_query_file_info,
5188         .set_path_size = smb2_set_path_size,
5189         .set_file_size = smb2_set_file_size,
5190         .set_file_info = smb2_set_file_info,
5191         .set_compression = smb2_set_compression,
5192         .mkdir = smb2_mkdir,
5193         .mkdir_setinfo = smb2_mkdir_setinfo,
5194         .rmdir = smb2_rmdir,
5195         .unlink = smb2_unlink,
5196         .rename = smb2_rename_path,
5197         .create_hardlink = smb2_create_hardlink,
5198         .query_symlink = smb2_query_symlink,
5199         .query_mf_symlink = smb3_query_mf_symlink,
5200         .create_mf_symlink = smb3_create_mf_symlink,
5201         .open = smb2_open_file,
5202         .set_fid = smb2_set_fid,
5203         .close = smb2_close_file,
5204         .flush = smb2_flush_file,
5205         .async_readv = smb2_async_readv,
5206         .async_writev = smb2_async_writev,
5207         .sync_read = smb2_sync_read,
5208         .sync_write = smb2_sync_write,
5209         .query_dir_first = smb2_query_dir_first,
5210         .query_dir_next = smb2_query_dir_next,
5211         .close_dir = smb2_close_dir,
5212         .calc_smb_size = smb2_calc_size,
5213         .is_status_pending = smb2_is_status_pending,
5214         .is_session_expired = smb2_is_session_expired,
5215         .oplock_response = smb2_oplock_response,
5216         .queryfs = smb2_queryfs,
5217         .mand_lock = smb2_mand_lock,
5218         .mand_unlock_range = smb2_unlock_range,
5219         .push_mand_locks = smb2_push_mandatory_locks,
5220         .get_lease_key = smb2_get_lease_key,
5221         .set_lease_key = smb2_set_lease_key,
5222         .new_lease_key = smb2_new_lease_key,
5223         .calc_signature = smb2_calc_signature,
5224         .is_read_op = smb2_is_read_op,
5225         .set_oplock_level = smb2_set_oplock_level,
5226         .create_lease_buf = smb2_create_lease_buf,
5227         .parse_lease_buf = smb2_parse_lease_buf,
5228         .copychunk_range = smb2_copychunk_range,
5229         .wp_retry_size = smb2_wp_retry_size,
5230         .dir_needs_close = smb2_dir_needs_close,
5231         .get_dfs_refer = smb2_get_dfs_refer,
5232         .select_sectype = smb2_select_sectype,
5233 #ifdef CONFIG_CIFS_XATTR
5234         .query_all_EAs = smb2_query_eas,
5235         .set_EA = smb2_set_ea,
5236 #endif /* CIFS_XATTR */
5237         .get_acl = get_smb2_acl,
5238         .get_acl_by_fid = get_smb2_acl_by_fid,
5239         .set_acl = set_smb2_acl,
5240         .next_header = smb2_next_header,
5241         .ioctl_query_info = smb2_ioctl_query_info,
5242         .make_node = smb2_make_node,
5243         .fiemap = smb3_fiemap,
5244         .llseek = smb3_llseek,
5245         .is_status_io_timeout = smb2_is_status_io_timeout,
5246         .is_network_name_deleted = smb2_is_network_name_deleted,
5247 };
5248 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5249
5250 struct smb_version_operations smb21_operations = {
5251         .compare_fids = smb2_compare_fids,
5252         .setup_request = smb2_setup_request,
5253         .setup_async_request = smb2_setup_async_request,
5254         .check_receive = smb2_check_receive,
5255         .add_credits = smb2_add_credits,
5256         .set_credits = smb2_set_credits,
5257         .get_credits_field = smb2_get_credits_field,
5258         .get_credits = smb2_get_credits,
5259         .wait_mtu_credits = smb2_wait_mtu_credits,
5260         .adjust_credits = smb2_adjust_credits,
5261         .get_next_mid = smb2_get_next_mid,
5262         .revert_current_mid = smb2_revert_current_mid,
5263         .read_data_offset = smb2_read_data_offset,
5264         .read_data_length = smb2_read_data_length,
5265         .map_error = map_smb2_to_linux_error,
5266         .find_mid = smb2_find_mid,
5267         .check_message = smb2_check_message,
5268         .dump_detail = smb2_dump_detail,
5269         .clear_stats = smb2_clear_stats,
5270         .print_stats = smb2_print_stats,
5271         .is_oplock_break = smb2_is_valid_oplock_break,
5272         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5273         .downgrade_oplock = smb2_downgrade_oplock,
5274         .need_neg = smb2_need_neg,
5275         .negotiate = smb2_negotiate,
5276         .negotiate_wsize = smb2_negotiate_wsize,
5277         .negotiate_rsize = smb2_negotiate_rsize,
5278         .sess_setup = SMB2_sess_setup,
5279         .logoff = SMB2_logoff,
5280         .tree_connect = SMB2_tcon,
5281         .tree_disconnect = SMB2_tdis,
5282         .qfs_tcon = smb2_qfs_tcon,
5283         .is_path_accessible = smb2_is_path_accessible,
5284         .can_echo = smb2_can_echo,
5285         .echo = SMB2_echo,
5286         .query_path_info = smb2_query_path_info,
5287         .query_reparse_point = smb2_query_reparse_point,
5288         .get_srv_inum = smb2_get_srv_inum,
5289         .query_file_info = smb2_query_file_info,
5290         .set_path_size = smb2_set_path_size,
5291         .set_file_size = smb2_set_file_size,
5292         .set_file_info = smb2_set_file_info,
5293         .set_compression = smb2_set_compression,
5294         .mkdir = smb2_mkdir,
5295         .mkdir_setinfo = smb2_mkdir_setinfo,
5296         .rmdir = smb2_rmdir,
5297         .unlink = smb2_unlink,
5298         .rename = smb2_rename_path,
5299         .create_hardlink = smb2_create_hardlink,
5300         .query_symlink = smb2_query_symlink,
5301         .query_mf_symlink = smb3_query_mf_symlink,
5302         .create_mf_symlink = smb3_create_mf_symlink,
5303         .open = smb2_open_file,
5304         .set_fid = smb2_set_fid,
5305         .close = smb2_close_file,
5306         .flush = smb2_flush_file,
5307         .async_readv = smb2_async_readv,
5308         .async_writev = smb2_async_writev,
5309         .sync_read = smb2_sync_read,
5310         .sync_write = smb2_sync_write,
5311         .query_dir_first = smb2_query_dir_first,
5312         .query_dir_next = smb2_query_dir_next,
5313         .close_dir = smb2_close_dir,
5314         .calc_smb_size = smb2_calc_size,
5315         .is_status_pending = smb2_is_status_pending,
5316         .is_session_expired = smb2_is_session_expired,
5317         .oplock_response = smb2_oplock_response,
5318         .queryfs = smb2_queryfs,
5319         .mand_lock = smb2_mand_lock,
5320         .mand_unlock_range = smb2_unlock_range,
5321         .push_mand_locks = smb2_push_mandatory_locks,
5322         .get_lease_key = smb2_get_lease_key,
5323         .set_lease_key = smb2_set_lease_key,
5324         .new_lease_key = smb2_new_lease_key,
5325         .calc_signature = smb2_calc_signature,
5326         .is_read_op = smb21_is_read_op,
5327         .set_oplock_level = smb21_set_oplock_level,
5328         .create_lease_buf = smb2_create_lease_buf,
5329         .parse_lease_buf = smb2_parse_lease_buf,
5330         .copychunk_range = smb2_copychunk_range,
5331         .wp_retry_size = smb2_wp_retry_size,
5332         .dir_needs_close = smb2_dir_needs_close,
5333         .enum_snapshots = smb3_enum_snapshots,
5334         .notify = smb3_notify,
5335         .get_dfs_refer = smb2_get_dfs_refer,
5336         .select_sectype = smb2_select_sectype,
5337 #ifdef CONFIG_CIFS_XATTR
5338         .query_all_EAs = smb2_query_eas,
5339         .set_EA = smb2_set_ea,
5340 #endif /* CIFS_XATTR */
5341         .get_acl = get_smb2_acl,
5342         .get_acl_by_fid = get_smb2_acl_by_fid,
5343         .set_acl = set_smb2_acl,
5344         .next_header = smb2_next_header,
5345         .ioctl_query_info = smb2_ioctl_query_info,
5346         .make_node = smb2_make_node,
5347         .fiemap = smb3_fiemap,
5348         .llseek = smb3_llseek,
5349         .is_status_io_timeout = smb2_is_status_io_timeout,
5350         .is_network_name_deleted = smb2_is_network_name_deleted,
5351 };
5352
5353 struct smb_version_operations smb30_operations = {
5354         .compare_fids = smb2_compare_fids,
5355         .setup_request = smb2_setup_request,
5356         .setup_async_request = smb2_setup_async_request,
5357         .check_receive = smb2_check_receive,
5358         .add_credits = smb2_add_credits,
5359         .set_credits = smb2_set_credits,
5360         .get_credits_field = smb2_get_credits_field,
5361         .get_credits = smb2_get_credits,
5362         .wait_mtu_credits = smb2_wait_mtu_credits,
5363         .adjust_credits = smb2_adjust_credits,
5364         .get_next_mid = smb2_get_next_mid,
5365         .revert_current_mid = smb2_revert_current_mid,
5366         .read_data_offset = smb2_read_data_offset,
5367         .read_data_length = smb2_read_data_length,
5368         .map_error = map_smb2_to_linux_error,
5369         .find_mid = smb2_find_mid,
5370         .check_message = smb2_check_message,
5371         .dump_detail = smb2_dump_detail,
5372         .clear_stats = smb2_clear_stats,
5373         .print_stats = smb2_print_stats,
5374         .dump_share_caps = smb2_dump_share_caps,
5375         .is_oplock_break = smb2_is_valid_oplock_break,
5376         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5377         .downgrade_oplock = smb3_downgrade_oplock,
5378         .need_neg = smb2_need_neg,
5379         .negotiate = smb2_negotiate,
5380         .negotiate_wsize = smb3_negotiate_wsize,
5381         .negotiate_rsize = smb3_negotiate_rsize,
5382         .sess_setup = SMB2_sess_setup,
5383         .logoff = SMB2_logoff,
5384         .tree_connect = SMB2_tcon,
5385         .tree_disconnect = SMB2_tdis,
5386         .qfs_tcon = smb3_qfs_tcon,
5387         .is_path_accessible = smb2_is_path_accessible,
5388         .can_echo = smb2_can_echo,
5389         .echo = SMB2_echo,
5390         .query_path_info = smb2_query_path_info,
5391         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5392         .query_reparse_point = smb2_query_reparse_point,
5393         .get_srv_inum = smb2_get_srv_inum,
5394         .query_file_info = smb2_query_file_info,
5395         .set_path_size = smb2_set_path_size,
5396         .set_file_size = smb2_set_file_size,
5397         .set_file_info = smb2_set_file_info,
5398         .set_compression = smb2_set_compression,
5399         .mkdir = smb2_mkdir,
5400         .mkdir_setinfo = smb2_mkdir_setinfo,
5401         .rmdir = smb2_rmdir,
5402         .unlink = smb2_unlink,
5403         .rename = smb2_rename_path,
5404         .create_hardlink = smb2_create_hardlink,
5405         .query_symlink = smb2_query_symlink,
5406         .query_mf_symlink = smb3_query_mf_symlink,
5407         .create_mf_symlink = smb3_create_mf_symlink,
5408         .open = smb2_open_file,
5409         .set_fid = smb2_set_fid,
5410         .close = smb2_close_file,
5411         .close_getattr = smb2_close_getattr,
5412         .flush = smb2_flush_file,
5413         .async_readv = smb2_async_readv,
5414         .async_writev = smb2_async_writev,
5415         .sync_read = smb2_sync_read,
5416         .sync_write = smb2_sync_write,
5417         .query_dir_first = smb2_query_dir_first,
5418         .query_dir_next = smb2_query_dir_next,
5419         .close_dir = smb2_close_dir,
5420         .calc_smb_size = smb2_calc_size,
5421         .is_status_pending = smb2_is_status_pending,
5422         .is_session_expired = smb2_is_session_expired,
5423         .oplock_response = smb2_oplock_response,
5424         .queryfs = smb2_queryfs,
5425         .mand_lock = smb2_mand_lock,
5426         .mand_unlock_range = smb2_unlock_range,
5427         .push_mand_locks = smb2_push_mandatory_locks,
5428         .get_lease_key = smb2_get_lease_key,
5429         .set_lease_key = smb2_set_lease_key,
5430         .new_lease_key = smb2_new_lease_key,
5431         .generate_signingkey = generate_smb30signingkey,
5432         .calc_signature = smb3_calc_signature,
5433         .set_integrity  = smb3_set_integrity,
5434         .is_read_op = smb21_is_read_op,
5435         .set_oplock_level = smb3_set_oplock_level,
5436         .create_lease_buf = smb3_create_lease_buf,
5437         .parse_lease_buf = smb3_parse_lease_buf,
5438         .copychunk_range = smb2_copychunk_range,
5439         .duplicate_extents = smb2_duplicate_extents,
5440         .validate_negotiate = smb3_validate_negotiate,
5441         .wp_retry_size = smb2_wp_retry_size,
5442         .dir_needs_close = smb2_dir_needs_close,
5443         .fallocate = smb3_fallocate,
5444         .enum_snapshots = smb3_enum_snapshots,
5445         .notify = smb3_notify,
5446         .init_transform_rq = smb3_init_transform_rq,
5447         .is_transform_hdr = smb3_is_transform_hdr,
5448         .receive_transform = smb3_receive_transform,
5449         .get_dfs_refer = smb2_get_dfs_refer,
5450         .select_sectype = smb2_select_sectype,
5451 #ifdef CONFIG_CIFS_XATTR
5452         .query_all_EAs = smb2_query_eas,
5453         .set_EA = smb2_set_ea,
5454 #endif /* CIFS_XATTR */
5455         .get_acl = get_smb2_acl,
5456         .get_acl_by_fid = get_smb2_acl_by_fid,
5457         .set_acl = set_smb2_acl,
5458         .next_header = smb2_next_header,
5459         .ioctl_query_info = smb2_ioctl_query_info,
5460         .make_node = smb2_make_node,
5461         .fiemap = smb3_fiemap,
5462         .llseek = smb3_llseek,
5463         .is_status_io_timeout = smb2_is_status_io_timeout,
5464         .is_network_name_deleted = smb2_is_network_name_deleted,
5465 };
5466
5467 struct smb_version_operations smb311_operations = {
5468         .compare_fids = smb2_compare_fids,
5469         .setup_request = smb2_setup_request,
5470         .setup_async_request = smb2_setup_async_request,
5471         .check_receive = smb2_check_receive,
5472         .add_credits = smb2_add_credits,
5473         .set_credits = smb2_set_credits,
5474         .get_credits_field = smb2_get_credits_field,
5475         .get_credits = smb2_get_credits,
5476         .wait_mtu_credits = smb2_wait_mtu_credits,
5477         .adjust_credits = smb2_adjust_credits,
5478         .get_next_mid = smb2_get_next_mid,
5479         .revert_current_mid = smb2_revert_current_mid,
5480         .read_data_offset = smb2_read_data_offset,
5481         .read_data_length = smb2_read_data_length,
5482         .map_error = map_smb2_to_linux_error,
5483         .find_mid = smb2_find_mid,
5484         .check_message = smb2_check_message,
5485         .dump_detail = smb2_dump_detail,
5486         .clear_stats = smb2_clear_stats,
5487         .print_stats = smb2_print_stats,
5488         .dump_share_caps = smb2_dump_share_caps,
5489         .is_oplock_break = smb2_is_valid_oplock_break,
5490         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5491         .downgrade_oplock = smb3_downgrade_oplock,
5492         .need_neg = smb2_need_neg,
5493         .negotiate = smb2_negotiate,
5494         .negotiate_wsize = smb3_negotiate_wsize,
5495         .negotiate_rsize = smb3_negotiate_rsize,
5496         .sess_setup = SMB2_sess_setup,
5497         .logoff = SMB2_logoff,
5498         .tree_connect = SMB2_tcon,
5499         .tree_disconnect = SMB2_tdis,
5500         .qfs_tcon = smb3_qfs_tcon,
5501         .is_path_accessible = smb2_is_path_accessible,
5502         .can_echo = smb2_can_echo,
5503         .echo = SMB2_echo,
5504         .query_path_info = smb2_query_path_info,
5505         .query_reparse_point = smb2_query_reparse_point,
5506         .get_srv_inum = smb2_get_srv_inum,
5507         .query_file_info = smb2_query_file_info,
5508         .set_path_size = smb2_set_path_size,
5509         .set_file_size = smb2_set_file_size,
5510         .set_file_info = smb2_set_file_info,
5511         .set_compression = smb2_set_compression,
5512         .mkdir = smb2_mkdir,
5513         .mkdir_setinfo = smb2_mkdir_setinfo,
5514         .posix_mkdir = smb311_posix_mkdir,
5515         .rmdir = smb2_rmdir,
5516         .unlink = smb2_unlink,
5517         .rename = smb2_rename_path,
5518         .create_hardlink = smb2_create_hardlink,
5519         .query_symlink = smb2_query_symlink,
5520         .query_mf_symlink = smb3_query_mf_symlink,
5521         .create_mf_symlink = smb3_create_mf_symlink,
5522         .open = smb2_open_file,
5523         .set_fid = smb2_set_fid,
5524         .close = smb2_close_file,
5525         .close_getattr = smb2_close_getattr,
5526         .flush = smb2_flush_file,
5527         .async_readv = smb2_async_readv,
5528         .async_writev = smb2_async_writev,
5529         .sync_read = smb2_sync_read,
5530         .sync_write = smb2_sync_write,
5531         .query_dir_first = smb2_query_dir_first,
5532         .query_dir_next = smb2_query_dir_next,
5533         .close_dir = smb2_close_dir,
5534         .calc_smb_size = smb2_calc_size,
5535         .is_status_pending = smb2_is_status_pending,
5536         .is_session_expired = smb2_is_session_expired,
5537         .oplock_response = smb2_oplock_response,
5538         .queryfs = smb311_queryfs,
5539         .mand_lock = smb2_mand_lock,
5540         .mand_unlock_range = smb2_unlock_range,
5541         .push_mand_locks = smb2_push_mandatory_locks,
5542         .get_lease_key = smb2_get_lease_key,
5543         .set_lease_key = smb2_set_lease_key,
5544         .new_lease_key = smb2_new_lease_key,
5545         .generate_signingkey = generate_smb311signingkey,
5546         .calc_signature = smb3_calc_signature,
5547         .set_integrity  = smb3_set_integrity,
5548         .is_read_op = smb21_is_read_op,
5549         .set_oplock_level = smb3_set_oplock_level,
5550         .create_lease_buf = smb3_create_lease_buf,
5551         .parse_lease_buf = smb3_parse_lease_buf,
5552         .copychunk_range = smb2_copychunk_range,
5553         .duplicate_extents = smb2_duplicate_extents,
5554 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5555         .wp_retry_size = smb2_wp_retry_size,
5556         .dir_needs_close = smb2_dir_needs_close,
5557         .fallocate = smb3_fallocate,
5558         .enum_snapshots = smb3_enum_snapshots,
5559         .notify = smb3_notify,
5560         .init_transform_rq = smb3_init_transform_rq,
5561         .is_transform_hdr = smb3_is_transform_hdr,
5562         .receive_transform = smb3_receive_transform,
5563         .get_dfs_refer = smb2_get_dfs_refer,
5564         .select_sectype = smb2_select_sectype,
5565 #ifdef CONFIG_CIFS_XATTR
5566         .query_all_EAs = smb2_query_eas,
5567         .set_EA = smb2_set_ea,
5568 #endif /* CIFS_XATTR */
5569         .get_acl = get_smb2_acl,
5570         .get_acl_by_fid = get_smb2_acl_by_fid,
5571         .set_acl = set_smb2_acl,
5572         .next_header = smb2_next_header,
5573         .ioctl_query_info = smb2_ioctl_query_info,
5574         .make_node = smb2_make_node,
5575         .fiemap = smb3_fiemap,
5576         .llseek = smb3_llseek,
5577         .is_status_io_timeout = smb2_is_status_io_timeout,
5578         .is_network_name_deleted = smb2_is_network_name_deleted,
5579 };
5580
5581 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5582 struct smb_version_values smb20_values = {
5583         .version_string = SMB20_VERSION_STRING,
5584         .protocol_id = SMB20_PROT_ID,
5585         .req_capabilities = 0, /* MBZ */
5586         .large_lock_type = 0,
5587         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5588         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5589         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5590         .header_size = sizeof(struct smb2_hdr),
5591         .header_preamble_size = 0,
5592         .max_header_size = MAX_SMB2_HDR_SIZE,
5593         .read_rsp_size = sizeof(struct smb2_read_rsp),
5594         .lock_cmd = SMB2_LOCK,
5595         .cap_unix = 0,
5596         .cap_nt_find = SMB2_NT_FIND,
5597         .cap_large_files = SMB2_LARGE_FILES,
5598         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5599         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5600         .create_lease_size = sizeof(struct create_lease),
5601 };
5602 #endif /* ALLOW_INSECURE_LEGACY */
5603
5604 struct smb_version_values smb21_values = {
5605         .version_string = SMB21_VERSION_STRING,
5606         .protocol_id = SMB21_PROT_ID,
5607         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5608         .large_lock_type = 0,
5609         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5610         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5611         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5612         .header_size = sizeof(struct smb2_hdr),
5613         .header_preamble_size = 0,
5614         .max_header_size = MAX_SMB2_HDR_SIZE,
5615         .read_rsp_size = sizeof(struct smb2_read_rsp),
5616         .lock_cmd = SMB2_LOCK,
5617         .cap_unix = 0,
5618         .cap_nt_find = SMB2_NT_FIND,
5619         .cap_large_files = SMB2_LARGE_FILES,
5620         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5621         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5622         .create_lease_size = sizeof(struct create_lease),
5623 };
5624
5625 struct smb_version_values smb3any_values = {
5626         .version_string = SMB3ANY_VERSION_STRING,
5627         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5628         .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,
5629         .large_lock_type = 0,
5630         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5631         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5632         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5633         .header_size = sizeof(struct smb2_hdr),
5634         .header_preamble_size = 0,
5635         .max_header_size = MAX_SMB2_HDR_SIZE,
5636         .read_rsp_size = sizeof(struct smb2_read_rsp),
5637         .lock_cmd = SMB2_LOCK,
5638         .cap_unix = 0,
5639         .cap_nt_find = SMB2_NT_FIND,
5640         .cap_large_files = SMB2_LARGE_FILES,
5641         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5642         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5643         .create_lease_size = sizeof(struct create_lease_v2),
5644 };
5645
5646 struct smb_version_values smbdefault_values = {
5647         .version_string = SMBDEFAULT_VERSION_STRING,
5648         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5649         .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,
5650         .large_lock_type = 0,
5651         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5652         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5653         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5654         .header_size = sizeof(struct smb2_hdr),
5655         .header_preamble_size = 0,
5656         .max_header_size = MAX_SMB2_HDR_SIZE,
5657         .read_rsp_size = sizeof(struct smb2_read_rsp),
5658         .lock_cmd = SMB2_LOCK,
5659         .cap_unix = 0,
5660         .cap_nt_find = SMB2_NT_FIND,
5661         .cap_large_files = SMB2_LARGE_FILES,
5662         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5663         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5664         .create_lease_size = sizeof(struct create_lease_v2),
5665 };
5666
5667 struct smb_version_values smb30_values = {
5668         .version_string = SMB30_VERSION_STRING,
5669         .protocol_id = SMB30_PROT_ID,
5670         .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,
5671         .large_lock_type = 0,
5672         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5673         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5674         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5675         .header_size = sizeof(struct smb2_hdr),
5676         .header_preamble_size = 0,
5677         .max_header_size = MAX_SMB2_HDR_SIZE,
5678         .read_rsp_size = sizeof(struct smb2_read_rsp),
5679         .lock_cmd = SMB2_LOCK,
5680         .cap_unix = 0,
5681         .cap_nt_find = SMB2_NT_FIND,
5682         .cap_large_files = SMB2_LARGE_FILES,
5683         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5684         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5685         .create_lease_size = sizeof(struct create_lease_v2),
5686 };
5687
5688 struct smb_version_values smb302_values = {
5689         .version_string = SMB302_VERSION_STRING,
5690         .protocol_id = SMB302_PROT_ID,
5691         .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,
5692         .large_lock_type = 0,
5693         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5694         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5695         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5696         .header_size = sizeof(struct smb2_hdr),
5697         .header_preamble_size = 0,
5698         .max_header_size = MAX_SMB2_HDR_SIZE,
5699         .read_rsp_size = sizeof(struct smb2_read_rsp),
5700         .lock_cmd = SMB2_LOCK,
5701         .cap_unix = 0,
5702         .cap_nt_find = SMB2_NT_FIND,
5703         .cap_large_files = SMB2_LARGE_FILES,
5704         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5705         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5706         .create_lease_size = sizeof(struct create_lease_v2),
5707 };
5708
5709 struct smb_version_values smb311_values = {
5710         .version_string = SMB311_VERSION_STRING,
5711         .protocol_id = SMB311_PROT_ID,
5712         .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,
5713         .large_lock_type = 0,
5714         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5715         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5716         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5717         .header_size = sizeof(struct smb2_hdr),
5718         .header_preamble_size = 0,
5719         .max_header_size = MAX_SMB2_HDR_SIZE,
5720         .read_rsp_size = sizeof(struct smb2_read_rsp),
5721         .lock_cmd = SMB2_LOCK,
5722         .cap_unix = 0,
5723         .cap_nt_find = SMB2_NT_FIND,
5724         .cap_large_files = SMB2_LARGE_FILES,
5725         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5726         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5727         .create_lease_size = sizeof(struct create_lease_v2),
5728 };