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         struct TCP_Server_Info *pserver;
 760
 761         /* do not query too frequently */
 762         if (ses->iface_last_update &&
 763             time_before(jiffies, ses->iface_last_update +
 764                         (SMB_INTERFACE_POLL_INTERVAL * HZ)))
 765                 return 0;
 766
 767         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 768                         FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 769                         NULL /* no data input */, 0 /* no data input */,
 770                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 771         if (rc == -EOPNOTSUPP) {
 772                 cifs_dbg(FYI,
 773                          "server does not support query network interfaces\n");
 774                 ret_data_len = 0;
 775         } else if (rc != 0) {
 776                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 777                 goto out;
 778         }
 779
 780         rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
 781         if (rc)
 782                 goto out;
 783
 784         /* check if iface is still active */
 785         pserver = ses->chans[0].server;
 786         if (pserver && !cifs_chan_is_iface_active(ses, pserver))
 787                 cifs_chan_update_iface(ses, pserver);
 788
 789 out:
 790         kfree(out_buf);
 791         return rc;
 792 }
 793
 794 static void
 795 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 796               struct cifs_sb_info *cifs_sb)
 797 {
 798         int rc;
 799         __le16 srch_path = 0; /* Null - open root of share */
 800         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 801         struct cifs_open_parms oparms;
 802         struct cifs_fid fid;
 803         struct cached_fid *cfid = NULL;
 804
 805         oparms = (struct cifs_open_parms) {
 806                 .tcon = tcon,
 807                 .path = "",
 808                 .desired_access = FILE_READ_ATTRIBUTES,
 809                 .disposition = FILE_OPEN,
 810                 .create_options = cifs_create_options(cifs_sb, 0),
 811                 .fid = &fid,
 812         };
 813
 814         rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
 815         if (rc == 0)
 816                 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
 817         else
 818                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 819                                NULL, NULL);
 820         if (rc)
 821                 return;
 822
 823         SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
 824
 825         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 826                         FS_ATTRIBUTE_INFORMATION);
 827         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 828                         FS_DEVICE_INFORMATION);
 829         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 830                         FS_VOLUME_INFORMATION);
 831         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 832                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 833         if (cfid == NULL)
 834                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 835         else
 836                 close_cached_dir(cfid);
 837 }
 838
 839 static void
 840 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 841               struct cifs_sb_info *cifs_sb)
 842 {
 843         int rc;
 844         __le16 srch_path = 0; /* Null - open root of share */
 845         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 846         struct cifs_open_parms oparms;
 847         struct cifs_fid fid;
 848
 849         oparms = (struct cifs_open_parms) {
 850                 .tcon = tcon,
 851                 .path = "",
 852                 .desired_access = FILE_READ_ATTRIBUTES,
 853                 .disposition = FILE_OPEN,
 854                 .create_options = cifs_create_options(cifs_sb, 0),
 855                 .fid = &fid,
 856         };
 857
 858         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 859                        NULL, NULL);
 860         if (rc)
 861                 return;
 862
 863         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 864                         FS_ATTRIBUTE_INFORMATION);
 865         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 866                         FS_DEVICE_INFORMATION);
 867         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 868 }
 869
 870 static int
 871 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 872                         struct cifs_sb_info *cifs_sb, const char *full_path)
 873 {
 874         __le16 *utf16_path;
 875         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 876         int err_buftype = CIFS_NO_BUFFER;
 877         struct cifs_open_parms oparms;
 878         struct kvec err_iov = {};
 879         struct cifs_fid fid;
 880         struct cached_fid *cfid;
 881         bool islink;
 882         int rc, rc2;
 883
 884         rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
 885         if (!rc) {
 886                 if (cfid->has_lease) {
 887                         close_cached_dir(cfid);
 888                         return 0;
 889                 }
 890                 close_cached_dir(cfid);
 891         }
 892
 893         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 894         if (!utf16_path)
 895                 return -ENOMEM;
 896
 897         oparms = (struct cifs_open_parms) {
 898                 .tcon = tcon,
 899                 .path = full_path,
 900                 .desired_access = FILE_READ_ATTRIBUTES,
 901                 .disposition = FILE_OPEN,
 902                 .create_options = cifs_create_options(cifs_sb, 0),
 903                 .fid = &fid,
 904         };
 905
 906         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
 907                        &err_iov, &err_buftype);
 908         if (rc) {
 909                 struct smb2_hdr *hdr = err_iov.iov_base;
 910
 911                 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
 912                         goto out;
 913
 914                 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
 915                         rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 916                                                              full_path, &islink);
 917                         if (rc2) {
 918                                 rc = rc2;
 919                                 goto out;
 920                         }
 921                         if (islink)
 922                                 rc = -EREMOTE;
 923                 }
 924                 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
 925                     (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
 926                         rc = -EOPNOTSUPP;
 927                 goto out;
 928         }
 929
 930         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 931
 932 out:
 933         free_rsp_buf(err_buftype, err_iov.iov_base);
 934         kfree(utf16_path);
 935         return rc;
 936 }
 937
 938 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 939                              struct cifs_sb_info *cifs_sb, const char *full_path,
 940                              u64 *uniqueid, struct cifs_open_info_data *data)
 941 {
 942         *uniqueid = le64_to_cpu(data->fi.IndexNumber);
 943         return 0;
 944 }
 945
 946 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 947                                 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
 948 {
 949         struct cifs_fid *fid = &cfile->fid;
 950
 951         if (cfile->symlink_target) {
 952                 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 953                 if (!data->symlink_target)
 954                         return -ENOMEM;
 955         }
 956         return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
 957 }
 958
 959 #ifdef CONFIG_CIFS_XATTR
 960 static ssize_t
 961 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 962                      struct smb2_file_full_ea_info *src, size_t src_size,
 963                      const unsigned char *ea_name)
 964 {
 965         int rc = 0;
 966         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 967         char *name, *value;
 968         size_t buf_size = dst_size;
 969         size_t name_len, value_len, user_name_len;
 970
 971         while (src_size > 0) {
 972                 name_len = (size_t)src->ea_name_length;
 973                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 974
 975                 if (name_len == 0)
 976                         break;
 977
 978                 if (src_size < 8 + name_len + 1 + value_len) {
 979                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 980                         rc = -EIO;
 981                         goto out;
 982                 }
 983
 984                 name = &src->ea_data[0];
 985                 value = &src->ea_data[src->ea_name_length + 1];
 986
 987                 if (ea_name) {
 988                         if (ea_name_len == name_len &&
 989                             memcmp(ea_name, name, name_len) == 0) {
 990                                 rc = value_len;
 991                                 if (dst_size == 0)
 992                                         goto out;
 993                                 if (dst_size < value_len) {
 994                                         rc = -ERANGE;
 995                                         goto out;
 996                                 }
 997                                 memcpy(dst, value, value_len);
 998                                 goto out;
 999                         }
1000                 } else {
1001                         /* 'user.' plus a terminating null */
1002                         user_name_len = 5 + 1 + name_len;
1003
1004                         if (buf_size == 0) {
1005                                 /* skip copy - calc size only */
1006                                 rc += user_name_len;
1007                         } else if (dst_size >= user_name_len) {
1008                                 dst_size -= user_name_len;
1009                                 memcpy(dst, "user.", 5);
1010                                 dst += 5;
1011                                 memcpy(dst, src->ea_data, name_len);
1012                                 dst += name_len;
1013                                 *dst = 0;
1014                                 ++dst;
1015                                 rc += user_name_len;
1016                         } else {
1017                                 /* stop before overrun buffer */
1018                                 rc = -ERANGE;
1019                                 break;
1020                         }
1021                 }
1022
1023                 if (!src->next_entry_offset)
1024                         break;
1025
1026                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1027                         /* stop before overrun buffer */
1028                         rc = -ERANGE;
1029                         break;
1030                 }
1031                 src_size -= le32_to_cpu(src->next_entry_offset);
1032                 src = (void *)((char *)src +
1033                                le32_to_cpu(src->next_entry_offset));
1034         }
1035
1036         /* didn't find the named attribute */
1037         if (ea_name)
1038                 rc = -ENODATA;
1039
1040 out:
1041         return (ssize_t)rc;
1042 }
1043
1044 static ssize_t
1045 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1046                const unsigned char *path, const unsigned char *ea_name,
1047                char *ea_data, size_t buf_size,
1048                struct cifs_sb_info *cifs_sb)
1049 {
1050         int rc;
1051         struct kvec rsp_iov = {NULL, 0};
1052         int buftype = CIFS_NO_BUFFER;
1053         struct smb2_query_info_rsp *rsp;
1054         struct smb2_file_full_ea_info *info = NULL;
1055
1056         rc = smb2_query_info_compound(xid, tcon, path,
1057                                       FILE_READ_EA,
1058                                       FILE_FULL_EA_INFORMATION,
1059                                       SMB2_O_INFO_FILE,
1060                                       CIFSMaxBufSize -
1061                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1062                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1063                                       &rsp_iov, &buftype, cifs_sb);
1064         if (rc) {
1065                 /*
1066                  * If ea_name is NULL (listxattr) and there are no EAs,
1067                  * return 0 as it's not an error. Otherwise, the specified
1068                  * ea_name was not found.
1069                  */
1070                 if (!ea_name && rc == -ENODATA)
1071                         rc = 0;
1072                 goto qeas_exit;
1073         }
1074
1075         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1076         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1077                                le32_to_cpu(rsp->OutputBufferLength),
1078                                &rsp_iov,
1079                                sizeof(struct smb2_file_full_ea_info));
1080         if (rc)
1081                 goto qeas_exit;
1082
1083         info = (struct smb2_file_full_ea_info *)(
1084                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1085         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1086                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1087
1088  qeas_exit:
1089         free_rsp_buf(buftype, rsp_iov.iov_base);
1090         return rc;
1091 }
1092
1093 static int
1094 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1095             const char *path, const char *ea_name, const void *ea_value,
1096             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1097             struct cifs_sb_info *cifs_sb)
1098 {
1099         struct smb2_compound_vars *vars;
1100         struct cifs_ses *ses = tcon->ses;
1101         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1102         struct smb_rqst *rqst;
1103         struct kvec *rsp_iov;
1104         __le16 *utf16_path = NULL;
1105         int ea_name_len = strlen(ea_name);
1106         int flags = CIFS_CP_CREATE_CLOSE_OP;
1107         int len;
1108         int resp_buftype[3];
1109         struct cifs_open_parms oparms;
1110         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1111         struct cifs_fid fid;
1112         unsigned int size[1];
1113         void *data[1];
1114         struct smb2_file_full_ea_info *ea = NULL;
1115         struct smb2_query_info_rsp *rsp;
1116         int rc, used_len = 0;
1117
1118         if (smb3_encryption_required(tcon))
1119                 flags |= CIFS_TRANSFORM_REQ;
1120
1121         if (ea_name_len > 255)
1122                 return -EINVAL;
1123
1124         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1125         if (!utf16_path)
1126                 return -ENOMEM;
1127
1128         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1129         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
1130         if (!vars) {
1131                 rc = -ENOMEM;
1132                 goto out_free_path;
1133         }
1134         rqst = vars->rqst;
1135         rsp_iov = vars->rsp_iov;
1136
1137         if (ses->server->ops->query_all_EAs) {
1138                 if (!ea_value) {
1139                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1140                                                              ea_name, NULL, 0,
1141                                                              cifs_sb);
1142                         if (rc == -ENODATA)
1143                                 goto sea_exit;
1144                 } else {
1145                         /* If we are adding a attribute we should first check
1146                          * if there will be enough space available to store
1147                          * the new EA. If not we should not add it since we
1148                          * would not be able to even read the EAs back.
1149                          */
1150                         rc = smb2_query_info_compound(xid, tcon, path,
1151                                       FILE_READ_EA,
1152                                       FILE_FULL_EA_INFORMATION,
1153                                       SMB2_O_INFO_FILE,
1154                                       CIFSMaxBufSize -
1155                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1156                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1157                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1158                         if (rc == 0) {
1159                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1160                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1161                         }
1162                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1163                         resp_buftype[1] = CIFS_NO_BUFFER;
1164                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1165                         rc = 0;
1166
1167                         /* Use a fudge factor of 256 bytes in case we collide
1168                          * with a different set_EAs command.
1169                          */
1170                         if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1171                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1172                            used_len + ea_name_len + ea_value_len + 1) {
1173                                 rc = -ENOSPC;
1174                                 goto sea_exit;
1175                         }
1176                 }
1177         }
1178
1179         /* Open */
1180         rqst[0].rq_iov = vars->open_iov;
1181         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1182
1183         oparms = (struct cifs_open_parms) {
1184                 .tcon = tcon,
1185                 .path = path,
1186                 .desired_access = FILE_WRITE_EA,
1187                 .disposition = FILE_OPEN,
1188                 .create_options = cifs_create_options(cifs_sb, 0),
1189                 .fid = &fid,
1190         };
1191
1192         rc = SMB2_open_init(tcon, server,
1193                             &rqst[0], &oplock, &oparms, utf16_path);
1194         if (rc)
1195                 goto sea_exit;
1196         smb2_set_next_command(tcon, &rqst[0]);
1197
1198
1199         /* Set Info */
1200         rqst[1].rq_iov = vars->si_iov;
1201         rqst[1].rq_nvec = 1;
1202
1203         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1204         ea = kzalloc(len, GFP_KERNEL);
1205         if (ea == NULL) {
1206                 rc = -ENOMEM;
1207                 goto sea_exit;
1208         }
1209
1210         ea->ea_name_length = ea_name_len;
1211         ea->ea_value_length = cpu_to_le16(ea_value_len);
1212         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1213         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1214
1215         size[0] = len;
1216         data[0] = ea;
1217
1218         rc = SMB2_set_info_init(tcon, server,
1219                                 &rqst[1], COMPOUND_FID,
1220                                 COMPOUND_FID, current->tgid,
1221                                 FILE_FULL_EA_INFORMATION,
1222                                 SMB2_O_INFO_FILE, 0, data, size);
1223         if (rc)
1224                 goto sea_exit;
1225         smb2_set_next_command(tcon, &rqst[1]);
1226         smb2_set_related(&rqst[1]);
1227
1228         /* Close */
1229         rqst[2].rq_iov = &vars->close_iov;
1230         rqst[2].rq_nvec = 1;
1231         rc = SMB2_close_init(tcon, server,
1232                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1233         if (rc)
1234                 goto sea_exit;
1235         smb2_set_related(&rqst[2]);
1236
1237         rc = compound_send_recv(xid, ses, server,
1238                                 flags, 3, rqst,
1239                                 resp_buftype, rsp_iov);
1240         /* no need to bump num_remote_opens because handle immediately closed */
1241
1242  sea_exit:
1243         kfree(ea);
1244         SMB2_open_free(&rqst[0]);
1245         SMB2_set_info_free(&rqst[1]);
1246         SMB2_close_free(&rqst[2]);
1247         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1248         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1249         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1250         kfree(vars);
1251 out_free_path:
1252         kfree(utf16_path);
1253         return rc;
1254 }
1255 #endif
1256
1257 static bool
1258 smb2_can_echo(struct TCP_Server_Info *server)
1259 {
1260         return server->echoes;
1261 }
1262
1263 static void
1264 smb2_clear_stats(struct cifs_tcon *tcon)
1265 {
1266         int i;
1267
1268         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1269                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1270                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1271         }
1272 }
1273
1274 static void
1275 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1276 {
1277         seq_puts(m, "\n\tShare Capabilities:");
1278         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1279                 seq_puts(m, " DFS,");
1280         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1281                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1282         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1283                 seq_puts(m, " SCALEOUT,");
1284         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1285                 seq_puts(m, " CLUSTER,");
1286         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1287                 seq_puts(m, " ASYMMETRIC,");
1288         if (tcon->capabilities == 0)
1289                 seq_puts(m, " None");
1290         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1291                 seq_puts(m, " Aligned,");
1292         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1293                 seq_puts(m, " Partition Aligned,");
1294         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1295                 seq_puts(m, " SSD,");
1296         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1297                 seq_puts(m, " TRIM-support,");
1298
1299         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1300         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1301         if (tcon->perf_sector_size)
1302                 seq_printf(m, "\tOptimal sector size: 0x%x",
1303                            tcon->perf_sector_size);
1304         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1305 }
1306
1307 static void
1308 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1309 {
1310         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1311         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1312
1313         /*
1314          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1315          *  totals (requests sent) since those SMBs are per-session not per tcon
1316          */
1317         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1318                    (long long)(tcon->bytes_read),
1319                    (long long)(tcon->bytes_written));
1320         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1321                    atomic_read(&tcon->num_local_opens),
1322                    atomic_read(&tcon->num_remote_opens));
1323         seq_printf(m, "\nTreeConnects: %d total %d failed",
1324                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1325                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1326         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1327                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1328                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1329         seq_printf(m, "\nCreates: %d total %d failed",
1330                    atomic_read(&sent[SMB2_CREATE_HE]),
1331                    atomic_read(&failed[SMB2_CREATE_HE]));
1332         seq_printf(m, "\nCloses: %d total %d failed",
1333                    atomic_read(&sent[SMB2_CLOSE_HE]),
1334                    atomic_read(&failed[SMB2_CLOSE_HE]));
1335         seq_printf(m, "\nFlushes: %d total %d failed",
1336                    atomic_read(&sent[SMB2_FLUSH_HE]),
1337                    atomic_read(&failed[SMB2_FLUSH_HE]));
1338         seq_printf(m, "\nReads: %d total %d failed",
1339                    atomic_read(&sent[SMB2_READ_HE]),
1340                    atomic_read(&failed[SMB2_READ_HE]));
1341         seq_printf(m, "\nWrites: %d total %d failed",
1342                    atomic_read(&sent[SMB2_WRITE_HE]),
1343                    atomic_read(&failed[SMB2_WRITE_HE]));
1344         seq_printf(m, "\nLocks: %d total %d failed",
1345                    atomic_read(&sent[SMB2_LOCK_HE]),
1346                    atomic_read(&failed[SMB2_LOCK_HE]));
1347         seq_printf(m, "\nIOCTLs: %d total %d failed",
1348                    atomic_read(&sent[SMB2_IOCTL_HE]),
1349                    atomic_read(&failed[SMB2_IOCTL_HE]));
1350         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1351                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1352                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1353         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1354                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1355                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1356         seq_printf(m, "\nQueryInfos: %d total %d failed",
1357                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1358                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1359         seq_printf(m, "\nSetInfos: %d total %d failed",
1360                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1361                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1362         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1363                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1364                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1365 }
1366
1367 static void
1368 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1369 {
1370         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1371         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1372
1373         cfile->fid.persistent_fid = fid->persistent_fid;
1374         cfile->fid.volatile_fid = fid->volatile_fid;
1375         cfile->fid.access = fid->access;
1376 #ifdef CONFIG_CIFS_DEBUG2
1377         cfile->fid.mid = fid->mid;
1378 #endif /* CIFS_DEBUG2 */
1379         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1380                                       &fid->purge_cache);
1381         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1382         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1383 }
1384
1385 static void
1386 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1387                 struct cifs_fid *fid)
1388 {
1389         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1390 }
1391
1392 static void
1393 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1394                    struct cifsFileInfo *cfile)
1395 {
1396         struct smb2_file_network_open_info file_inf;
1397         struct inode *inode;
1398         int rc;
1399
1400         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1401                    cfile->fid.volatile_fid, &file_inf);
1402         if (rc)
1403                 return;
1404
1405         inode = d_inode(cfile->dentry);
1406
1407         spin_lock(&inode->i_lock);
1408         CIFS_I(inode)->time = jiffies;
1409
1410         /* Creation time should not need to be updated on close */
1411         if (file_inf.LastWriteTime)
1412                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1413         if (file_inf.ChangeTime)
1414                 inode_set_ctime_to_ts(inode,
1415                                       cifs_NTtimeToUnix(file_inf.ChangeTime));
1416         if (file_inf.LastAccessTime)
1417                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1418
1419         /*
1420          * i_blocks is not related to (i_size / i_blksize),
1421          * but instead 512 byte (2**9) size is required for
1422          * calculating num blocks.
1423          */
1424         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1425                 inode->i_blocks =
1426                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1427
1428         /* End of file and Attributes should not have to be updated on close */
1429         spin_unlock(&inode->i_lock);
1430 }
1431
1432 static int
1433 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1434                      u64 persistent_fid, u64 volatile_fid,
1435                      struct copychunk_ioctl *pcchunk)
1436 {
1437         int rc;
1438         unsigned int ret_data_len;
1439         struct resume_key_req *res_key;
1440
1441         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1442                         FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1443                         CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1444
1445         if (rc == -EOPNOTSUPP) {
1446                 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1447                 goto req_res_key_exit;
1448         } else if (rc) {
1449                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1450                 goto req_res_key_exit;
1451         }
1452         if (ret_data_len < sizeof(struct resume_key_req)) {
1453                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1454                 rc = -EINVAL;
1455                 goto req_res_key_exit;
1456         }
1457         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1458
1459 req_res_key_exit:
1460         kfree(res_key);
1461         return rc;
1462 }
1463
1464 static int
1465 smb2_ioctl_query_info(const unsigned int xid,
1466                       struct cifs_tcon *tcon,
1467                       struct cifs_sb_info *cifs_sb,
1468                       __le16 *path, int is_dir,
1469                       unsigned long p)
1470 {
1471         struct smb2_compound_vars *vars;
1472         struct smb_rqst *rqst;
1473         struct kvec *rsp_iov;
1474         struct cifs_ses *ses = tcon->ses;
1475         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1476         char __user *arg = (char __user *)p;
1477         struct smb_query_info qi;
1478         struct smb_query_info __user *pqi;
1479         int rc = 0;
1480         int flags = CIFS_CP_CREATE_CLOSE_OP;
1481         struct smb2_query_info_rsp *qi_rsp = NULL;
1482         struct smb2_ioctl_rsp *io_rsp = NULL;
1483         void *buffer = NULL;
1484         int resp_buftype[3];
1485         struct cifs_open_parms oparms;
1486         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1487         struct cifs_fid fid;
1488         unsigned int size[2];
1489         void *data[2];
1490         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1491         void (*free_req1_func)(struct smb_rqst *r);
1492
1493         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1494         if (vars == NULL)
1495                 return -ENOMEM;
1496         rqst = &vars->rqst[0];
1497         rsp_iov = &vars->rsp_iov[0];
1498
1499         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1500
1501         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1502                 rc = -EFAULT;
1503                 goto free_vars;
1504         }
1505         if (qi.output_buffer_length > 1024) {
1506                 rc = -EINVAL;
1507                 goto free_vars;
1508         }
1509
1510         if (!ses || !server) {
1511                 rc = -EIO;
1512                 goto free_vars;
1513         }
1514
1515         if (smb3_encryption_required(tcon))
1516                 flags |= CIFS_TRANSFORM_REQ;
1517
1518         if (qi.output_buffer_length) {
1519                 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1520                 if (IS_ERR(buffer)) {
1521                         rc = PTR_ERR(buffer);
1522                         goto free_vars;
1523                 }
1524         }
1525
1526         /* Open */
1527         rqst[0].rq_iov = &vars->open_iov[0];
1528         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1529
1530         oparms = (struct cifs_open_parms) {
1531                 .tcon = tcon,
1532                 .disposition = FILE_OPEN,
1533                 .create_options = cifs_create_options(cifs_sb, create_options),
1534                 .fid = &fid,
1535         };
1536
1537         if (qi.flags & PASSTHRU_FSCTL) {
1538                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1539                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1540                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1541                         break;
1542                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1543                         oparms.desired_access = GENERIC_ALL;
1544                         break;
1545                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1546                         oparms.desired_access = GENERIC_READ;
1547                         break;
1548                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1549                         oparms.desired_access = GENERIC_WRITE;
1550                         break;
1551                 }
1552         } else if (qi.flags & PASSTHRU_SET_INFO) {
1553                 oparms.desired_access = GENERIC_WRITE;
1554         } else {
1555                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1556         }
1557
1558         rc = SMB2_open_init(tcon, server,
1559                             &rqst[0], &oplock, &oparms, path);
1560         if (rc)
1561                 goto free_output_buffer;
1562         smb2_set_next_command(tcon, &rqst[0]);
1563
1564         /* Query */
1565         if (qi.flags & PASSTHRU_FSCTL) {
1566                 /* Can eventually relax perm check since server enforces too */
1567                 if (!capable(CAP_SYS_ADMIN)) {
1568                         rc = -EPERM;
1569                         goto free_open_req;
1570                 }
1571                 rqst[1].rq_iov = &vars->io_iov[0];
1572                 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1573
1574                 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1575                                      qi.info_type, buffer, qi.output_buffer_length,
1576                                      CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1577                                      MAX_SMB2_CLOSE_RESPONSE_SIZE);
1578                 free_req1_func = SMB2_ioctl_free;
1579         } else if (qi.flags == PASSTHRU_SET_INFO) {
1580                 /* Can eventually relax perm check since server enforces too */
1581                 if (!capable(CAP_SYS_ADMIN)) {
1582                         rc = -EPERM;
1583                         goto free_open_req;
1584                 }
1585                 if (qi.output_buffer_length < 8) {
1586                         rc = -EINVAL;
1587                         goto free_open_req;
1588                 }
1589                 rqst[1].rq_iov = vars->si_iov;
1590                 rqst[1].rq_nvec = 1;
1591
1592                 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1593                 size[0] = 8;
1594                 data[0] = buffer;
1595
1596                 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1597                                         current->tgid, FILE_END_OF_FILE_INFORMATION,
1598                                         SMB2_O_INFO_FILE, 0, data, size);
1599                 free_req1_func = SMB2_set_info_free;
1600         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1601                 rqst[1].rq_iov = &vars->qi_iov;
1602                 rqst[1].rq_nvec = 1;
1603
1604                 rc = SMB2_query_info_init(tcon, server,
1605                                   &rqst[1], COMPOUND_FID,
1606                                   COMPOUND_FID, qi.file_info_class,
1607                                   qi.info_type, qi.additional_information,
1608                                   qi.input_buffer_length,
1609                                   qi.output_buffer_length, buffer);
1610                 free_req1_func = SMB2_query_info_free;
1611         } else { /* unknown flags */
1612                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1613                               qi.flags);
1614                 rc = -EINVAL;
1615         }
1616
1617         if (rc)
1618                 goto free_open_req;
1619         smb2_set_next_command(tcon, &rqst[1]);
1620         smb2_set_related(&rqst[1]);
1621
1622         /* Close */
1623         rqst[2].rq_iov = &vars->close_iov;
1624         rqst[2].rq_nvec = 1;
1625
1626         rc = SMB2_close_init(tcon, server,
1627                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1628         if (rc)
1629                 goto free_req_1;
1630         smb2_set_related(&rqst[2]);
1631
1632         rc = compound_send_recv(xid, ses, server,
1633                                 flags, 3, rqst,
1634                                 resp_buftype, rsp_iov);
1635         if (rc)
1636                 goto out;
1637
1638         /* No need to bump num_remote_opens since handle immediately closed */
1639         if (qi.flags & PASSTHRU_FSCTL) {
1640                 pqi = (struct smb_query_info __user *)arg;
1641                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1642                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1643                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1644                 if (qi.input_buffer_length > 0 &&
1645                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1646                     > rsp_iov[1].iov_len) {
1647                         rc = -EFAULT;
1648                         goto out;
1649                 }
1650
1651                 if (copy_to_user(&pqi->input_buffer_length,
1652                                  &qi.input_buffer_length,
1653                                  sizeof(qi.input_buffer_length))) {
1654                         rc = -EFAULT;
1655                         goto out;
1656                 }
1657
1658                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1659                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1660                                  qi.input_buffer_length))
1661                         rc = -EFAULT;
1662         } else {
1663                 pqi = (struct smb_query_info __user *)arg;
1664                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1665                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1666                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1667                 if (copy_to_user(&pqi->input_buffer_length,
1668                                  &qi.input_buffer_length,
1669                                  sizeof(qi.input_buffer_length))) {
1670                         rc = -EFAULT;
1671                         goto out;
1672                 }
1673
1674                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1675                                  qi.input_buffer_length))
1676                         rc = -EFAULT;
1677         }
1678
1679 out:
1680         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1681         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1682         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1683         SMB2_close_free(&rqst[2]);
1684 free_req_1:
1685         free_req1_func(&rqst[1]);
1686 free_open_req:
1687         SMB2_open_free(&rqst[0]);
1688 free_output_buffer:
1689         kfree(buffer);
1690 free_vars:
1691         kfree(vars);
1692         return rc;
1693 }
1694
1695 static ssize_t
1696 smb2_copychunk_range(const unsigned int xid,
1697                         struct cifsFileInfo *srcfile,
1698                         struct cifsFileInfo *trgtfile, u64 src_off,
1699                         u64 len, u64 dest_off)
1700 {
1701         int rc;
1702         unsigned int ret_data_len;
1703         struct copychunk_ioctl *pcchunk;
1704         struct copychunk_ioctl_rsp *retbuf = NULL;
1705         struct cifs_tcon *tcon;
1706         int chunks_copied = 0;
1707         bool chunk_sizes_updated = false;
1708         ssize_t bytes_written, total_bytes_written = 0;
1709
1710         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1711         if (pcchunk == NULL)
1712                 return -ENOMEM;
1713
1714         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1715         /* Request a key from the server to identify the source of the copy */
1716         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1717                                 srcfile->fid.persistent_fid,
1718                                 srcfile->fid.volatile_fid, pcchunk);
1719
1720         /* Note: request_res_key sets res_key null only if rc !=0 */
1721         if (rc)
1722                 goto cchunk_out;
1723
1724         /* For now array only one chunk long, will make more flexible later */
1725         pcchunk->ChunkCount = cpu_to_le32(1);
1726         pcchunk->Reserved = 0;
1727         pcchunk->Reserved2 = 0;
1728
1729         tcon = tlink_tcon(trgtfile->tlink);
1730
1731         while (len > 0) {
1732                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1733                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1734                 pcchunk->Length =
1735                         cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1736
1737                 /* Request server copy to target from src identified by key */
1738                 kfree(retbuf);
1739                 retbuf = NULL;
1740                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1741                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1742                         (char *)pcchunk, sizeof(struct copychunk_ioctl),
1743                         CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1744                 if (rc == 0) {
1745                         if (ret_data_len !=
1746                                         sizeof(struct copychunk_ioctl_rsp)) {
1747                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1748                                 rc = -EIO;
1749                                 goto cchunk_out;
1750                         }
1751                         if (retbuf->TotalBytesWritten == 0) {
1752                                 cifs_dbg(FYI, "no bytes copied\n");
1753                                 rc = -EIO;
1754                                 goto cchunk_out;
1755                         }
1756                         /*
1757                          * Check if server claimed to write more than we asked
1758                          */
1759                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1760                             le32_to_cpu(pcchunk->Length)) {
1761                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1762                                 rc = -EIO;
1763                                 goto cchunk_out;
1764                         }
1765                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1766                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1767                                 rc = -EIO;
1768                                 goto cchunk_out;
1769                         }
1770                         chunks_copied++;
1771
1772                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1773                         src_off += bytes_written;
1774                         dest_off += bytes_written;
1775                         len -= bytes_written;
1776                         total_bytes_written += bytes_written;
1777
1778                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1779                                 le32_to_cpu(retbuf->ChunksWritten),
1780                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1781                                 bytes_written);
1782                 } else if (rc == -EINVAL) {
1783                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1784                                 goto cchunk_out;
1785
1786                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1787                                 le32_to_cpu(retbuf->ChunksWritten),
1788                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1789                                 le32_to_cpu(retbuf->TotalBytesWritten));
1790
1791                         /*
1792                          * Check if this is the first request using these sizes,
1793                          * (ie check if copy succeed once with original sizes
1794                          * and check if the server gave us different sizes after
1795                          * we already updated max sizes on previous request).
1796                          * if not then why is the server returning an error now
1797                          */
1798                         if ((chunks_copied != 0) || chunk_sizes_updated)
1799                                 goto cchunk_out;
1800
1801                         /* Check that server is not asking us to grow size */
1802                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1803                                         tcon->max_bytes_chunk)
1804                                 tcon->max_bytes_chunk =
1805                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1806                         else
1807                                 goto cchunk_out; /* server gave us bogus size */
1808
1809                         /* No need to change MaxChunks since already set to 1 */
1810                         chunk_sizes_updated = true;
1811                 } else
1812                         goto cchunk_out;
1813         }
1814
1815 cchunk_out:
1816         kfree(pcchunk);
1817         kfree(retbuf);
1818         if (rc)
1819                 return rc;
1820         else
1821                 return total_bytes_written;
1822 }
1823
1824 static int
1825 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1826                 struct cifs_fid *fid)
1827 {
1828         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1829 }
1830
1831 static unsigned int
1832 smb2_read_data_offset(char *buf)
1833 {
1834         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1835
1836         return rsp->DataOffset;
1837 }
1838
1839 static unsigned int
1840 smb2_read_data_length(char *buf, bool in_remaining)
1841 {
1842         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1843
1844         if (in_remaining)
1845                 return le32_to_cpu(rsp->DataRemaining);
1846
1847         return le32_to_cpu(rsp->DataLength);
1848 }
1849
1850
1851 static int
1852 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1853                struct cifs_io_parms *parms, unsigned int *bytes_read,
1854                char **buf, int *buf_type)
1855 {
1856         parms->persistent_fid = pfid->persistent_fid;
1857         parms->volatile_fid = pfid->volatile_fid;
1858         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1859 }
1860
1861 static int
1862 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1863                 struct cifs_io_parms *parms, unsigned int *written,
1864                 struct kvec *iov, unsigned long nr_segs)
1865 {
1866
1867         parms->persistent_fid = pfid->persistent_fid;
1868         parms->volatile_fid = pfid->volatile_fid;
1869         return SMB2_write(xid, parms, written, iov, nr_segs);
1870 }
1871
1872 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1873 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1874                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1875 {
1876         struct cifsInodeInfo *cifsi;
1877         int rc;
1878
1879         cifsi = CIFS_I(inode);
1880
1881         /* if file already sparse don't bother setting sparse again */
1882         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1883                 return true; /* already sparse */
1884
1885         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1886                 return true; /* already not sparse */
1887
1888         /*
1889          * Can't check for sparse support on share the usual way via the
1890          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1891          * since Samba server doesn't set the flag on the share, yet
1892          * supports the set sparse FSCTL and returns sparse correctly
1893          * in the file attributes. If we fail setting sparse though we
1894          * mark that server does not support sparse files for this share
1895          * to avoid repeatedly sending the unsupported fsctl to server
1896          * if the file is repeatedly extended.
1897          */
1898         if (tcon->broken_sparse_sup)
1899                 return false;
1900
1901         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1902                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1903                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1904         if (rc) {
1905                 tcon->broken_sparse_sup = true;
1906                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1907                 return false;
1908         }
1909
1910         if (setsparse)
1911                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1912         else
1913                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1914
1915         return true;
1916 }
1917
1918 static int
1919 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1920                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1921 {
1922         __le64 eof = cpu_to_le64(size);
1923         struct inode *inode;
1924
1925         /*
1926          * If extending file more than one page make sparse. Many Linux fs
1927          * make files sparse by default when extending via ftruncate
1928          */
1929         inode = d_inode(cfile->dentry);
1930
1931         if (!set_alloc && (size > inode->i_size + 8192)) {
1932                 __u8 set_sparse = 1;
1933
1934                 /* whether set sparse succeeds or not, extend the file */
1935                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1936         }
1937
1938         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1939                             cfile->fid.volatile_fid, cfile->pid, &eof);
1940 }
1941
1942 static int
1943 smb2_duplicate_extents(const unsigned int xid,
1944                         struct cifsFileInfo *srcfile,
1945                         struct cifsFileInfo *trgtfile, u64 src_off,
1946                         u64 len, u64 dest_off)
1947 {
1948         int rc;
1949         unsigned int ret_data_len;
1950         struct inode *inode;
1951         struct duplicate_extents_to_file dup_ext_buf;
1952         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1953
1954         /* server fileays advertise duplicate extent support with this flag */
1955         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1956              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1957                 return -EOPNOTSUPP;
1958
1959         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1960         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1961         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1962         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1963         dup_ext_buf.ByteCount = cpu_to_le64(len);
1964         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1965                 src_off, dest_off, len);
1966
1967         inode = d_inode(trgtfile->dentry);
1968         if (inode->i_size < dest_off + len) {
1969                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1970                 if (rc)
1971                         goto duplicate_extents_out;
1972
1973                 /*
1974                  * Although also could set plausible allocation size (i_blocks)
1975                  * here in addition to setting the file size, in reflink
1976                  * it is likely that the target file is sparse. Its allocation
1977                  * size will be queried on next revalidate, but it is important
1978                  * to make sure that file's cached size is updated immediately
1979                  */
1980                 cifs_setsize(inode, dest_off + len);
1981         }
1982         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1983                         trgtfile->fid.volatile_fid,
1984                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1985                         (char *)&dup_ext_buf,
1986                         sizeof(struct duplicate_extents_to_file),
1987                         CIFSMaxBufSize, NULL,
1988                         &ret_data_len);
1989
1990         if (ret_data_len > 0)
1991                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1992
1993 duplicate_extents_out:
1994         return rc;
1995 }
1996
1997 static int
1998 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1999                    struct cifsFileInfo *cfile)
2000 {
2001         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2002                             cfile->fid.volatile_fid);
2003 }
2004
2005 static int
2006 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2007                    struct cifsFileInfo *cfile)
2008 {
2009         struct fsctl_set_integrity_information_req integr_info;
2010         unsigned int ret_data_len;
2011
2012         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2013         integr_info.Flags = 0;
2014         integr_info.Reserved = 0;
2015
2016         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2017                         cfile->fid.volatile_fid,
2018                         FSCTL_SET_INTEGRITY_INFORMATION,
2019                         (char *)&integr_info,
2020                         sizeof(struct fsctl_set_integrity_information_req),
2021                         CIFSMaxBufSize, NULL,
2022                         &ret_data_len);
2023
2024 }
2025
2026 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2027 #define GMT_TOKEN_SIZE 50
2028
2029 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2030
2031 /*
2032  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2033  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2034  */
2035 static int
2036 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2037                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2038 {
2039         char *retbuf = NULL;
2040         unsigned int ret_data_len = 0;
2041         int rc;
2042         u32 max_response_size;
2043         struct smb_snapshot_array snapshot_in;
2044
2045         /*
2046          * On the first query to enumerate the list of snapshots available
2047          * for this volume the buffer begins with 0 (number of snapshots
2048          * which can be returned is zero since at that point we do not know
2049          * how big the buffer needs to be). On the second query,
2050          * it (ret_data_len) is set to number of snapshots so we can
2051          * know to set the maximum response size larger (see below).
2052          */
2053         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2054                 return -EFAULT;
2055
2056         /*
2057          * Note that for snapshot queries that servers like Azure expect that
2058          * the first query be minimal size (and just used to get the number/size
2059          * of previous versions) so response size must be specified as EXACTLY
2060          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2061          * of eight bytes.
2062          */
2063         if (ret_data_len == 0)
2064                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2065         else
2066                 max_response_size = CIFSMaxBufSize;
2067
2068         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2069                         cfile->fid.volatile_fid,
2070                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2071                         NULL, 0 /* no input data */, max_response_size,
2072                         (char **)&retbuf,
2073                         &ret_data_len);
2074         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2075                         rc, ret_data_len);
2076         if (rc)
2077                 return rc;
2078
2079         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2080                 /* Fixup buffer */
2081                 if (copy_from_user(&snapshot_in, ioc_buf,
2082                     sizeof(struct smb_snapshot_array))) {
2083                         rc = -EFAULT;
2084                         kfree(retbuf);
2085                         return rc;
2086                 }
2087
2088                 /*
2089                  * Check for min size, ie not large enough to fit even one GMT
2090                  * token (snapshot).  On the first ioctl some users may pass in
2091                  * smaller size (or zero) to simply get the size of the array
2092                  * so the user space caller can allocate sufficient memory
2093                  * and retry the ioctl again with larger array size sufficient
2094                  * to hold all of the snapshot GMT tokens on the second try.
2095                  */
2096                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2097                         ret_data_len = sizeof(struct smb_snapshot_array);
2098
2099                 /*
2100                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2101                  * the snapshot array (of 50 byte GMT tokens) each
2102                  * representing an available previous version of the data
2103                  */
2104                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2105                                         sizeof(struct smb_snapshot_array)))
2106                         ret_data_len = snapshot_in.snapshot_array_size +
2107                                         sizeof(struct smb_snapshot_array);
2108
2109                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2110                         rc = -EFAULT;
2111         }
2112
2113         kfree(retbuf);
2114         return rc;
2115 }
2116
2117
2118
2119 static int
2120 smb3_notify(const unsigned int xid, struct file *pfile,
2121             void __user *ioc_buf, bool return_changes)
2122 {
2123         struct smb3_notify_info notify;
2124         struct smb3_notify_info __user *pnotify_buf;
2125         struct dentry *dentry = pfile->f_path.dentry;
2126         struct inode *inode = file_inode(pfile);
2127         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2128         struct cifs_open_parms oparms;
2129         struct cifs_fid fid;
2130         struct cifs_tcon *tcon;
2131         const unsigned char *path;
2132         char *returned_ioctl_info = NULL;
2133         void *page = alloc_dentry_path();
2134         __le16 *utf16_path = NULL;
2135         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2136         int rc = 0;
2137         __u32 ret_len = 0;
2138
2139         path = build_path_from_dentry(dentry, page);
2140         if (IS_ERR(path)) {
2141                 rc = PTR_ERR(path);
2142                 goto notify_exit;
2143         }
2144
2145         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2146         if (utf16_path == NULL) {
2147                 rc = -ENOMEM;
2148                 goto notify_exit;
2149         }
2150
2151         if (return_changes) {
2152                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2153                         rc = -EFAULT;
2154                         goto notify_exit;
2155                 }
2156         } else {
2157                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2158                         rc = -EFAULT;
2159                         goto notify_exit;
2160                 }
2161                 notify.data_len = 0;
2162         }
2163
2164         tcon = cifs_sb_master_tcon(cifs_sb);
2165         oparms = (struct cifs_open_parms) {
2166                 .tcon = tcon,
2167                 .path = path,
2168                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2169                 .disposition = FILE_OPEN,
2170                 .create_options = cifs_create_options(cifs_sb, 0),
2171                 .fid = &fid,
2172         };
2173
2174         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2175                        NULL);
2176         if (rc)
2177                 goto notify_exit;
2178
2179         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2180                                 notify.watch_tree, notify.completion_filter,
2181                                 notify.data_len, &returned_ioctl_info, &ret_len);
2182
2183         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2184
2185         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2186         if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2187                 if (ret_len > notify.data_len)
2188                         ret_len = notify.data_len;
2189                 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2190                 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2191                         rc = -EFAULT;
2192                 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2193                         rc = -EFAULT;
2194         }
2195         kfree(returned_ioctl_info);
2196 notify_exit:
2197         free_dentry_path(page);
2198         kfree(utf16_path);
2199         return rc;
2200 }
2201
2202 static int
2203 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2204                      const char *path, struct cifs_sb_info *cifs_sb,
2205                      struct cifs_fid *fid, __u16 search_flags,
2206                      struct cifs_search_info *srch_inf)
2207 {
2208         __le16 *utf16_path;
2209         struct smb_rqst rqst[2];
2210         struct kvec rsp_iov[2];
2211         int resp_buftype[2];
2212         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2213         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2214         int rc, flags = 0;
2215         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2216         struct cifs_open_parms oparms;
2217         struct smb2_query_directory_rsp *qd_rsp = NULL;
2218         struct smb2_create_rsp *op_rsp = NULL;
2219         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2220         int retry_count = 0;
2221
2222         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2223         if (!utf16_path)
2224                 return -ENOMEM;
2225
2226         if (smb3_encryption_required(tcon))
2227                 flags |= CIFS_TRANSFORM_REQ;
2228
2229         memset(rqst, 0, sizeof(rqst));
2230         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2231         memset(rsp_iov, 0, sizeof(rsp_iov));
2232
2233         /* Open */
2234         memset(&open_iov, 0, sizeof(open_iov));
2235         rqst[0].rq_iov = open_iov;
2236         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2237
2238         oparms = (struct cifs_open_parms) {
2239                 .tcon = tcon,
2240                 .path = path,
2241                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2242                 .disposition = FILE_OPEN,
2243                 .create_options = cifs_create_options(cifs_sb, 0),
2244                 .fid = fid,
2245         };
2246
2247         rc = SMB2_open_init(tcon, server,
2248                             &rqst[0], &oplock, &oparms, utf16_path);
2249         if (rc)
2250                 goto qdf_free;
2251         smb2_set_next_command(tcon, &rqst[0]);
2252
2253         /* Query directory */
2254         srch_inf->entries_in_buffer = 0;
2255         srch_inf->index_of_last_entry = 2;
2256
2257         memset(&qd_iov, 0, sizeof(qd_iov));
2258         rqst[1].rq_iov = qd_iov;
2259         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2260
2261         rc = SMB2_query_directory_init(xid, tcon, server,
2262                                        &rqst[1],
2263                                        COMPOUND_FID, COMPOUND_FID,
2264                                        0, srch_inf->info_level);
2265         if (rc)
2266                 goto qdf_free;
2267
2268         smb2_set_related(&rqst[1]);
2269
2270 again:
2271         rc = compound_send_recv(xid, tcon->ses, server,
2272                                 flags, 2, rqst,
2273                                 resp_buftype, rsp_iov);
2274
2275         if (rc == -EAGAIN && retry_count++ < 10)
2276                 goto again;
2277
2278         /* If the open failed there is nothing to do */
2279         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2280         if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2281                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2282                 goto qdf_free;
2283         }
2284         fid->persistent_fid = op_rsp->PersistentFileId;
2285         fid->volatile_fid = op_rsp->VolatileFileId;
2286
2287         /* Anything else than ENODATA means a genuine error */
2288         if (rc && rc != -ENODATA) {
2289                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2290                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2291                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2292                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2293                 goto qdf_free;
2294         }
2295
2296         atomic_inc(&tcon->num_remote_opens);
2297
2298         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2299         if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2300                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2301                                           tcon->tid, tcon->ses->Suid, 0, 0);
2302                 srch_inf->endOfSearch = true;
2303                 rc = 0;
2304                 goto qdf_free;
2305         }
2306
2307         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2308                                         srch_inf);
2309         if (rc) {
2310                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2311                         tcon->ses->Suid, 0, 0, rc);
2312                 goto qdf_free;
2313         }
2314         resp_buftype[1] = CIFS_NO_BUFFER;
2315
2316         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2317                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2318
2319  qdf_free:
2320         kfree(utf16_path);
2321         SMB2_open_free(&rqst[0]);
2322         SMB2_query_directory_free(&rqst[1]);
2323         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2324         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2325         return rc;
2326 }
2327
2328 static int
2329 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2330                     struct cifs_fid *fid, __u16 search_flags,
2331                     struct cifs_search_info *srch_inf)
2332 {
2333         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2334                                     fid->volatile_fid, 0, srch_inf);
2335 }
2336
2337 static int
2338 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2339                struct cifs_fid *fid)
2340 {
2341         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2342 }
2343
2344 /*
2345  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2346  * the number of credits and return true. Otherwise - return false.
2347  */
2348 static bool
2349 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2350 {
2351         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2352         int scredits, in_flight;
2353
2354         if (shdr->Status != STATUS_PENDING)
2355                 return false;
2356
2357         if (shdr->CreditRequest) {
2358                 spin_lock(&server->req_lock);
2359                 server->credits += le16_to_cpu(shdr->CreditRequest);
2360                 scredits = server->credits;
2361                 in_flight = server->in_flight;
2362                 spin_unlock(&server->req_lock);
2363                 wake_up(&server->request_q);
2364
2365                 trace_smb3_pend_credits(server->CurrentMid,
2366                                 server->conn_id, server->hostname, scredits,
2367                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2368                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2369                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2370         }
2371
2372         return true;
2373 }
2374
2375 static bool
2376 smb2_is_session_expired(char *buf)
2377 {
2378         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2379
2380         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2381             shdr->Status != STATUS_USER_SESSION_DELETED)
2382                 return false;
2383
2384         trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2385                                le64_to_cpu(shdr->SessionId),
2386                                le16_to_cpu(shdr->Command),
2387                                le64_to_cpu(shdr->MessageId));
2388         cifs_dbg(FYI, "Session expired or deleted\n");
2389
2390         return true;
2391 }
2392
2393 static bool
2394 smb2_is_status_io_timeout(char *buf)
2395 {
2396         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2397
2398         if (shdr->Status == STATUS_IO_TIMEOUT)
2399                 return true;
2400         else
2401                 return false;
2402 }
2403
2404 static bool
2405 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2406 {
2407         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2408         struct TCP_Server_Info *pserver;
2409         struct cifs_ses *ses;
2410         struct cifs_tcon *tcon;
2411
2412         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2413                 return false;
2414
2415         /* If server is a channel, select the primary channel */
2416         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
2417
2418         spin_lock(&cifs_tcp_ses_lock);
2419         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2420                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2421                         if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2422                                 spin_lock(&tcon->tc_lock);
2423                                 tcon->need_reconnect = true;
2424                                 spin_unlock(&tcon->tc_lock);
2425                                 spin_unlock(&cifs_tcp_ses_lock);
2426                                 pr_warn_once("Server share %s deleted.\n",
2427                                              tcon->tree_name);
2428                                 return true;
2429                         }
2430                 }
2431         }
2432         spin_unlock(&cifs_tcp_ses_lock);
2433
2434         return false;
2435 }
2436
2437 static int
2438 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2439                 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2440 {
2441         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2442                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2443                                         smb2_get_lease_state(cinode));
2444
2445         return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2446                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2447 }
2448
2449 void
2450 smb2_set_related(struct smb_rqst *rqst)
2451 {
2452         struct smb2_hdr *shdr;
2453
2454         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2455         if (shdr == NULL) {
2456                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2457                 return;
2458         }
2459         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2460 }
2461
2462 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2463
2464 void
2465 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2466 {
2467         struct smb2_hdr *shdr;
2468         struct cifs_ses *ses = tcon->ses;
2469         struct TCP_Server_Info *server = ses->server;
2470         unsigned long len = smb_rqst_len(server, rqst);
2471         int i, num_padding;
2472
2473         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2474         if (shdr == NULL) {
2475                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2476                 return;
2477         }
2478
2479         /* SMB headers in a compound are 8 byte aligned. */
2480
2481         /* No padding needed */
2482         if (!(len & 7))
2483                 goto finished;
2484
2485         num_padding = 8 - (len & 7);
2486         if (!smb3_encryption_required(tcon)) {
2487                 /*
2488                  * If we do not have encryption then we can just add an extra
2489                  * iov for the padding.
2490                  */
2491                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2492                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2493                 rqst->rq_nvec++;
2494                 len += num_padding;
2495         } else {
2496                 /*
2497                  * We can not add a small padding iov for the encryption case
2498                  * because the encryption framework can not handle the padding
2499                  * iovs.
2500                  * We have to flatten this into a single buffer and add
2501                  * the padding to it.
2502                  */
2503                 for (i = 1; i < rqst->rq_nvec; i++) {
2504                         memcpy(rqst->rq_iov[0].iov_base +
2505                                rqst->rq_iov[0].iov_len,
2506                                rqst->rq_iov[i].iov_base,
2507                                rqst->rq_iov[i].iov_len);
2508                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2509                 }
2510                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2511                        0, num_padding);
2512                 rqst->rq_iov[0].iov_len += num_padding;
2513                 len += num_padding;
2514                 rqst->rq_nvec = 1;
2515         }
2516
2517  finished:
2518         shdr->NextCommand = cpu_to_le32(len);
2519 }
2520
2521 /*
2522  * Passes the query info response back to the caller on success.
2523  * Caller need to free this with free_rsp_buf().
2524  */
2525 int
2526 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2527                          const char *path, u32 desired_access,
2528                          u32 class, u32 type, u32 output_len,
2529                          struct kvec *rsp, int *buftype,
2530                          struct cifs_sb_info *cifs_sb)
2531 {
2532         struct smb2_compound_vars *vars;
2533         struct cifs_ses *ses = tcon->ses;
2534         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2535         int flags = CIFS_CP_CREATE_CLOSE_OP;
2536         struct smb_rqst *rqst;
2537         int resp_buftype[3];
2538         struct kvec *rsp_iov;
2539         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2540         struct cifs_open_parms oparms;
2541         struct cifs_fid fid;
2542         int rc;
2543         __le16 *utf16_path;
2544         struct cached_fid *cfid = NULL;
2545
2546         if (!path)
2547                 path = "";
2548         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2549         if (!utf16_path)
2550                 return -ENOMEM;
2551
2552         if (smb3_encryption_required(tcon))
2553                 flags |= CIFS_TRANSFORM_REQ;
2554
2555         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2556         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
2557         if (!vars) {
2558                 rc = -ENOMEM;
2559                 goto out_free_path;
2560         }
2561         rqst = vars->rqst;
2562         rsp_iov = vars->rsp_iov;
2563
2564         /*
2565          * We can only call this for things we know are directories.
2566          */
2567         if (!strcmp(path, ""))
2568                 open_cached_dir(xid, tcon, path, cifs_sb, false,
2569                                 &cfid); /* cfid null if open dir failed */
2570
2571         rqst[0].rq_iov = vars->open_iov;
2572         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2573
2574         oparms = (struct cifs_open_parms) {
2575                 .tcon = tcon,
2576                 .path = path,
2577                 .desired_access = desired_access,
2578                 .disposition = FILE_OPEN,
2579                 .create_options = cifs_create_options(cifs_sb, 0),
2580                 .fid = &fid,
2581         };
2582
2583         rc = SMB2_open_init(tcon, server,
2584                             &rqst[0], &oplock, &oparms, utf16_path);
2585         if (rc)
2586                 goto qic_exit;
2587         smb2_set_next_command(tcon, &rqst[0]);
2588
2589         rqst[1].rq_iov = &vars->qi_iov;
2590         rqst[1].rq_nvec = 1;
2591
2592         if (cfid) {
2593                 rc = SMB2_query_info_init(tcon, server,
2594                                           &rqst[1],
2595                                           cfid->fid.persistent_fid,
2596                                           cfid->fid.volatile_fid,
2597                                           class, type, 0,
2598                                           output_len, 0,
2599                                           NULL);
2600         } else {
2601                 rc = SMB2_query_info_init(tcon, server,
2602                                           &rqst[1],
2603                                           COMPOUND_FID,
2604                                           COMPOUND_FID,
2605                                           class, type, 0,
2606                                           output_len, 0,
2607                                           NULL);
2608         }
2609         if (rc)
2610                 goto qic_exit;
2611         if (!cfid) {
2612                 smb2_set_next_command(tcon, &rqst[1]);
2613                 smb2_set_related(&rqst[1]);
2614         }
2615
2616         rqst[2].rq_iov = &vars->close_iov;
2617         rqst[2].rq_nvec = 1;
2618
2619         rc = SMB2_close_init(tcon, server,
2620                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2621         if (rc)
2622                 goto qic_exit;
2623         smb2_set_related(&rqst[2]);
2624
2625         if (cfid) {
2626                 rc = compound_send_recv(xid, ses, server,
2627                                         flags, 1, &rqst[1],
2628                                         &resp_buftype[1], &rsp_iov[1]);
2629         } else {
2630                 rc = compound_send_recv(xid, ses, server,
2631                                         flags, 3, rqst,
2632                                         resp_buftype, rsp_iov);
2633         }
2634         if (rc) {
2635                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2636                 if (rc == -EREMCHG) {
2637                         tcon->need_reconnect = true;
2638                         pr_warn_once("server share %s deleted\n",
2639                                      tcon->tree_name);
2640                 }
2641                 goto qic_exit;
2642         }
2643         *rsp = rsp_iov[1];
2644         *buftype = resp_buftype[1];
2645
2646  qic_exit:
2647         SMB2_open_free(&rqst[0]);
2648         SMB2_query_info_free(&rqst[1]);
2649         SMB2_close_free(&rqst[2]);
2650         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2651         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2652         if (cfid)
2653                 close_cached_dir(cfid);
2654         kfree(vars);
2655 out_free_path:
2656         kfree(utf16_path);
2657         return rc;
2658 }
2659
2660 static int
2661 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2662              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2663 {
2664         struct smb2_query_info_rsp *rsp;
2665         struct smb2_fs_full_size_info *info = NULL;
2666         struct kvec rsp_iov = {NULL, 0};
2667         int buftype = CIFS_NO_BUFFER;
2668         int rc;
2669
2670
2671         rc = smb2_query_info_compound(xid, tcon, "",
2672                                       FILE_READ_ATTRIBUTES,
2673                                       FS_FULL_SIZE_INFORMATION,
2674                                       SMB2_O_INFO_FILESYSTEM,
2675                                       sizeof(struct smb2_fs_full_size_info),
2676                                       &rsp_iov, &buftype, cifs_sb);
2677         if (rc)
2678                 goto qfs_exit;
2679
2680         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2681         buf->f_type = SMB2_SUPER_MAGIC;
2682         info = (struct smb2_fs_full_size_info *)(
2683                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2684         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2685                                le32_to_cpu(rsp->OutputBufferLength),
2686                                &rsp_iov,
2687                                sizeof(struct smb2_fs_full_size_info));
2688         if (!rc)
2689                 smb2_copy_fs_info_to_kstatfs(info, buf);
2690
2691 qfs_exit:
2692         trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
2693         free_rsp_buf(buftype, rsp_iov.iov_base);
2694         return rc;
2695 }
2696
2697 static int
2698 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2699                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2700 {
2701         int rc;
2702         __le16 srch_path = 0; /* Null - open root of share */
2703         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2704         struct cifs_open_parms oparms;
2705         struct cifs_fid fid;
2706
2707         if (!tcon->posix_extensions)
2708                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2709
2710         oparms = (struct cifs_open_parms) {
2711                 .tcon = tcon,
2712                 .path = "",
2713                 .desired_access = FILE_READ_ATTRIBUTES,
2714                 .disposition = FILE_OPEN,
2715                 .create_options = cifs_create_options(cifs_sb, 0),
2716                 .fid = &fid,
2717         };
2718
2719         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2720                        NULL, NULL);
2721         if (rc)
2722                 return rc;
2723
2724         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2725                                    fid.volatile_fid, buf);
2726         buf->f_type = SMB2_SUPER_MAGIC;
2727         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2728         return rc;
2729 }
2730
2731 static bool
2732 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2733 {
2734         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2735                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2736 }
2737
2738 static int
2739 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2740                __u64 length, __u32 type, int lock, int unlock, bool wait)
2741 {
2742         if (unlock && !lock)
2743                 type = SMB2_LOCKFLAG_UNLOCK;
2744         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2745                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2746                          current->tgid, length, offset, type, wait);
2747 }
2748
2749 static void
2750 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2751 {
2752         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2753 }
2754
2755 static void
2756 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2757 {
2758         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2759 }
2760
2761 static void
2762 smb2_new_lease_key(struct cifs_fid *fid)
2763 {
2764         generate_random_uuid(fid->lease_key);
2765 }
2766
2767 static int
2768 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2769                    const char *search_name,
2770                    struct dfs_info3_param **target_nodes,
2771                    unsigned int *num_of_nodes,
2772                    const struct nls_table *nls_codepage, int remap)
2773 {
2774         int rc;
2775         __le16 *utf16_path = NULL;
2776         int utf16_path_len = 0;
2777         struct cifs_tcon *tcon;
2778         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2779         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2780         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2781         int retry_count = 0;
2782
2783         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2784
2785         /*
2786          * Try to use the IPC tcon, otherwise just use any
2787          */
2788         tcon = ses->tcon_ipc;
2789         if (tcon == NULL) {
2790                 spin_lock(&cifs_tcp_ses_lock);
2791                 tcon = list_first_entry_or_null(&ses->tcon_list,
2792                                                 struct cifs_tcon,
2793                                                 tcon_list);
2794                 if (tcon)
2795                         tcon->tc_count++;
2796                 spin_unlock(&cifs_tcp_ses_lock);
2797         }
2798
2799         if (tcon == NULL) {
2800                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2801                          ses);
2802                 rc = -ENOTCONN;
2803                 goto out;
2804         }
2805
2806         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2807                                            &utf16_path_len,
2808                                            nls_codepage, remap);
2809         if (!utf16_path) {
2810                 rc = -ENOMEM;
2811                 goto out;
2812         }
2813
2814         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2815         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2816         if (!dfs_req) {
2817                 rc = -ENOMEM;
2818                 goto out;
2819         }
2820
2821         /* Highest DFS referral version understood */
2822         dfs_req->MaxReferralLevel = DFS_VERSION;
2823
2824         /* Path to resolve in an UTF-16 null-terminated string */
2825         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2826
2827         do {
2828                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2829                                 FSCTL_DFS_GET_REFERRALS,
2830                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2831                                 (char **)&dfs_rsp, &dfs_rsp_size);
2832                 if (!is_retryable_error(rc))
2833                         break;
2834                 usleep_range(512, 2048);
2835         } while (++retry_count < 5);
2836
2837         if (rc) {
2838                 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2839                         cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2840                 goto out;
2841         }
2842
2843         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2844                                  num_of_nodes, target_nodes,
2845                                  nls_codepage, remap, search_name,
2846                                  true /* is_unicode */);
2847         if (rc) {
2848                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2849                 goto out;
2850         }
2851
2852  out:
2853         if (tcon && !tcon->ipc) {
2854                 /* ipc tcons are not refcounted */
2855                 spin_lock(&cifs_tcp_ses_lock);
2856                 tcon->tc_count--;
2857                 /* tc_count can never go negative */
2858                 WARN_ON(tcon->tc_count < 0);
2859                 spin_unlock(&cifs_tcp_ses_lock);
2860         }
2861         kfree(utf16_path);
2862         kfree(dfs_req);
2863         kfree(dfs_rsp);
2864         return rc;
2865 }
2866
2867 static int
2868 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2869                       u32 plen, char **target_path,
2870                       struct cifs_sb_info *cifs_sb)
2871 {
2872         unsigned int len;
2873
2874         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2875         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2876
2877         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2878                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2879                         le64_to_cpu(symlink_buf->InodeType));
2880                 return -EOPNOTSUPP;
2881         }
2882
2883         *target_path = cifs_strndup_from_utf16(
2884                                 symlink_buf->PathBuffer,
2885                                 len, true, cifs_sb->local_nls);
2886         if (!(*target_path))
2887                 return -ENOMEM;
2888
2889         convert_delimiter(*target_path, '/');
2890         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2891
2892         return 0;
2893 }
2894
2895 static int
2896 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2897                       u32 plen, char **target_path,
2898                       struct cifs_sb_info *cifs_sb)
2899 {
2900         unsigned int sub_len;
2901         unsigned int sub_offset;
2902
2903         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2904
2905         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2906         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2907         if (sub_offset + 20 > plen ||
2908             sub_offset + sub_len + 20 > plen) {
2909                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2910                 return -EIO;
2911         }
2912
2913         *target_path = cifs_strndup_from_utf16(
2914                                 symlink_buf->PathBuffer + sub_offset,
2915                                 sub_len, true, cifs_sb->local_nls);
2916         if (!(*target_path))
2917                 return -ENOMEM;
2918
2919         convert_delimiter(*target_path, '/');
2920         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2921
2922         return 0;
2923 }
2924
2925 static int
2926 parse_reparse_point(struct reparse_data_buffer *buf,
2927                     u32 plen, char **target_path,
2928                     struct cifs_sb_info *cifs_sb)
2929 {
2930         if (plen < sizeof(struct reparse_data_buffer)) {
2931                 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2932                          plen);
2933                 return -EIO;
2934         }
2935
2936         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2937             sizeof(struct reparse_data_buffer)) {
2938                 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2939                          plen);
2940                 return -EIO;
2941         }
2942
2943         /* See MS-FSCC 2.1.2 */
2944         switch (le32_to_cpu(buf->ReparseTag)) {
2945         case IO_REPARSE_TAG_NFS:
2946                 return parse_reparse_posix(
2947                         (struct reparse_posix_data *)buf,
2948                         plen, target_path, cifs_sb);
2949         case IO_REPARSE_TAG_SYMLINK:
2950                 return parse_reparse_symlink(
2951                         (struct reparse_symlink_data_buffer *)buf,
2952                         plen, target_path, cifs_sb);
2953         default:
2954                 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
2955                          le32_to_cpu(buf->ReparseTag));
2956                 return -EOPNOTSUPP;
2957         }
2958 }
2959
2960 static int smb2_query_symlink(const unsigned int xid,
2961                               struct cifs_tcon *tcon,
2962                               struct cifs_sb_info *cifs_sb,
2963                               const char *full_path,
2964                               char **target_path,
2965                               struct kvec *rsp_iov)
2966 {
2967         struct reparse_data_buffer *buf;
2968         struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
2969         u32 plen = le32_to_cpu(io->OutputCount);
2970
2971         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2972
2973         buf = (struct reparse_data_buffer *)((u8 *)io +
2974                                              le32_to_cpu(io->OutputOffset));
2975         return parse_reparse_point(buf, plen, target_path, cifs_sb);
2976 }
2977
2978 static int smb2_query_reparse_point(const unsigned int xid,
2979                                     struct cifs_tcon *tcon,
2980                                     struct cifs_sb_info *cifs_sb,
2981                                     const char *full_path,
2982                                     u32 *tag, struct kvec *rsp,
2983                                     int *rsp_buftype)
2984 {
2985         struct smb2_compound_vars *vars;
2986         int rc;
2987         __le16 *utf16_path = NULL;
2988         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2989         struct cifs_open_parms oparms;
2990         struct cifs_fid fid;
2991         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2992         int flags = CIFS_CP_CREATE_CLOSE_OP;
2993         struct smb_rqst *rqst;
2994         int resp_buftype[3];
2995         struct kvec *rsp_iov;
2996         struct smb2_ioctl_rsp *ioctl_rsp;
2997         struct reparse_data_buffer *reparse_buf;
2998         u32 plen;
2999
3000         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3001
3002         if (smb3_encryption_required(tcon))
3003                 flags |= CIFS_TRANSFORM_REQ;
3004
3005         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3006         if (!utf16_path)
3007                 return -ENOMEM;
3008
3009         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3010         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
3011         if (!vars) {
3012                 rc = -ENOMEM;
3013                 goto out_free_path;
3014         }
3015         rqst = vars->rqst;
3016         rsp_iov = vars->rsp_iov;
3017
3018         /*
3019          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3020          * to see if there is a handle already open that we can use
3021          */
3022         rqst[0].rq_iov = vars->open_iov;
3023         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3024
3025         oparms = (struct cifs_open_parms) {
3026                 .tcon = tcon,
3027                 .path = full_path,
3028                 .desired_access = FILE_READ_ATTRIBUTES,
3029                 .disposition = FILE_OPEN,
3030                 .create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
3031                 .fid = &fid,
3032         };
3033
3034         rc = SMB2_open_init(tcon, server,
3035                             &rqst[0], &oplock, &oparms, utf16_path);
3036         if (rc)
3037                 goto query_rp_exit;
3038         smb2_set_next_command(tcon, &rqst[0]);
3039
3040
3041         /* IOCTL */
3042         rqst[1].rq_iov = vars->io_iov;
3043         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3044
3045         rc = SMB2_ioctl_init(tcon, server,
3046                              &rqst[1], COMPOUND_FID,
3047                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3048                              CIFSMaxBufSize -
3049                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3050                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3051         if (rc)
3052                 goto query_rp_exit;
3053
3054         smb2_set_next_command(tcon, &rqst[1]);
3055         smb2_set_related(&rqst[1]);
3056
3057         /* Close */
3058         rqst[2].rq_iov = &vars->close_iov;
3059         rqst[2].rq_nvec = 1;
3060
3061         rc = SMB2_close_init(tcon, server,
3062                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3063         if (rc)
3064                 goto query_rp_exit;
3065
3066         smb2_set_related(&rqst[2]);
3067
3068         rc = compound_send_recv(xid, tcon->ses, server,
3069                                 flags, 3, rqst,
3070                                 resp_buftype, rsp_iov);
3071
3072         ioctl_rsp = rsp_iov[1].iov_base;
3073
3074         /*
3075          * Open was successful and we got an ioctl response.
3076          */
3077         if (rc == 0) {
3078                 /* See MS-FSCC 2.3.23 */
3079
3080                 reparse_buf = (struct reparse_data_buffer *)
3081                         ((char *)ioctl_rsp +
3082                          le32_to_cpu(ioctl_rsp->OutputOffset));
3083                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3084
3085                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3086                     rsp_iov[1].iov_len) {
3087                         cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3088                                  plen);
3089                         rc = -EIO;
3090                         goto query_rp_exit;
3091                 }
3092                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3093                 *rsp = rsp_iov[1];
3094                 *rsp_buftype = resp_buftype[1];
3095                 resp_buftype[1] = CIFS_NO_BUFFER;
3096         }
3097
3098  query_rp_exit:
3099         SMB2_open_free(&rqst[0]);
3100         SMB2_ioctl_free(&rqst[1]);
3101         SMB2_close_free(&rqst[2]);
3102         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3103         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3104         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3105         kfree(vars);
3106 out_free_path:
3107         kfree(utf16_path);
3108         return rc;
3109 }
3110
3111 static struct cifs_ntsd *
3112 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3113                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3114 {
3115         struct cifs_ntsd *pntsd = NULL;
3116         unsigned int xid;
3117         int rc = -EOPNOTSUPP;
3118         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3119
3120         if (IS_ERR(tlink))
3121                 return ERR_CAST(tlink);
3122
3123         xid = get_xid();
3124         cifs_dbg(FYI, "trying to get acl\n");
3125
3126         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3127                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3128                             info);
3129         free_xid(xid);
3130
3131         cifs_put_tlink(tlink);
3132
3133         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3134         if (rc)
3135                 return ERR_PTR(rc);
3136         return pntsd;
3137
3138 }
3139
3140 static struct cifs_ntsd *
3141 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3142                      const char *path, u32 *pacllen, u32 info)
3143 {
3144         struct cifs_ntsd *pntsd = NULL;
3145         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3146         unsigned int xid;
3147         int rc;
3148         struct cifs_tcon *tcon;
3149         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3150         struct cifs_fid fid;
3151         struct cifs_open_parms oparms;
3152         __le16 *utf16_path;
3153
3154         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3155         if (IS_ERR(tlink))
3156                 return ERR_CAST(tlink);
3157
3158         tcon = tlink_tcon(tlink);
3159         xid = get_xid();
3160
3161         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3162         if (!utf16_path) {
3163                 rc = -ENOMEM;
3164                 free_xid(xid);
3165                 return ERR_PTR(rc);
3166         }
3167
3168         oparms = (struct cifs_open_parms) {
3169                 .tcon = tcon,
3170                 .path = path,
3171                 .desired_access = READ_CONTROL,
3172                 .disposition = FILE_OPEN,
3173                 /*
3174                  * When querying an ACL, even if the file is a symlink
3175                  * we want to open the source not the target, and so
3176                  * the protocol requires that the client specify this
3177                  * flag when opening a reparse point
3178                  */
3179                 .create_options = cifs_create_options(cifs_sb, 0) |
3180                                   OPEN_REPARSE_POINT,
3181                 .fid = &fid,
3182         };
3183
3184         if (info & SACL_SECINFO)
3185                 oparms.desired_access |= SYSTEM_SECURITY;
3186
3187         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3188                        NULL);
3189         kfree(utf16_path);
3190         if (!rc) {
3191                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3192                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3193                                     info);
3194                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3195         }
3196
3197         cifs_put_tlink(tlink);
3198         free_xid(xid);
3199
3200         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3201         if (rc)
3202                 return ERR_PTR(rc);
3203         return pntsd;
3204 }
3205
3206 static int
3207 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3208                 struct inode *inode, const char *path, int aclflag)
3209 {
3210         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3211         unsigned int xid;
3212         int rc, access_flags = 0;
3213         struct cifs_tcon *tcon;
3214         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3215         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3216         struct cifs_fid fid;
3217         struct cifs_open_parms oparms;
3218         __le16 *utf16_path;
3219
3220         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3221         if (IS_ERR(tlink))
3222                 return PTR_ERR(tlink);
3223
3224         tcon = tlink_tcon(tlink);
3225         xid = get_xid();
3226
3227         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3228                 access_flags |= WRITE_OWNER;
3229         if (aclflag & CIFS_ACL_SACL)
3230                 access_flags |= SYSTEM_SECURITY;
3231         if (aclflag & CIFS_ACL_DACL)
3232                 access_flags |= WRITE_DAC;
3233
3234         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3235         if (!utf16_path) {
3236                 rc = -ENOMEM;
3237                 free_xid(xid);
3238                 return rc;
3239         }
3240
3241         oparms = (struct cifs_open_parms) {
3242                 .tcon = tcon,
3243                 .desired_access = access_flags,
3244                 .create_options = cifs_create_options(cifs_sb, 0),
3245                 .disposition = FILE_OPEN,
3246                 .path = path,
3247                 .fid = &fid,
3248         };
3249
3250         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3251                        NULL, NULL);
3252         kfree(utf16_path);
3253         if (!rc) {
3254                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3255                             fid.volatile_fid, pnntsd, acllen, aclflag);
3256                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3257         }
3258
3259         cifs_put_tlink(tlink);
3260         free_xid(xid);
3261         return rc;
3262 }
3263
3264 /* Retrieve an ACL from the server */
3265 static struct cifs_ntsd *
3266 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3267              struct inode *inode, const char *path,
3268              u32 *pacllen, u32 info)
3269 {
3270         struct cifs_ntsd *pntsd = NULL;
3271         struct cifsFileInfo *open_file = NULL;
3272
3273         if (inode && !(info & SACL_SECINFO))
3274                 open_file = find_readable_file(CIFS_I(inode), true);
3275         if (!open_file || (info & SACL_SECINFO))
3276                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3277
3278         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3279         cifsFileInfo_put(open_file);
3280         return pntsd;
3281 }
3282
3283 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3284                              loff_t offset, loff_t len, unsigned int xid)
3285 {
3286         struct cifsFileInfo *cfile = file->private_data;
3287         struct file_zero_data_information fsctl_buf;
3288
3289         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3290
3291         fsctl_buf.FileOffset = cpu_to_le64(offset);
3292         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3293
3294         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3295                           cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3296                           (char *)&fsctl_buf,
3297                           sizeof(struct file_zero_data_information),
3298                           0, NULL, NULL);
3299 }
3300
3301 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3302                             loff_t offset, loff_t len, bool keep_size)
3303 {
3304         struct cifs_ses *ses = tcon->ses;
3305         struct inode *inode = file_inode(file);
3306         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3307         struct cifsFileInfo *cfile = file->private_data;
3308         unsigned long long new_size;
3309         long rc;
3310         unsigned int xid;
3311         __le64 eof;
3312
3313         xid = get_xid();
3314
3315         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3316                               ses->Suid, offset, len);
3317
3318         inode_lock(inode);
3319         filemap_invalidate_lock(inode->i_mapping);
3320
3321         /*
3322          * We zero the range through ioctl, so we need remove the page caches
3323          * first, otherwise the data may be inconsistent with the server.
3324          */
3325         truncate_pagecache_range(inode, offset, offset + len - 1);
3326
3327         /* if file not oplocked can't be sure whether asking to extend size */
3328         rc = -EOPNOTSUPP;
3329         if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3330                 goto zero_range_exit;
3331
3332         rc = smb3_zero_data(file, tcon, offset, len, xid);
3333         if (rc < 0)
3334                 goto zero_range_exit;
3335
3336         /*
3337          * do we also need to change the size of the file?
3338          */
3339         new_size = offset + len;
3340         if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {
3341                 eof = cpu_to_le64(new_size);
3342                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3343                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3344                 if (rc >= 0) {
3345                         truncate_setsize(inode, new_size);
3346                         fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
3347                 }
3348         }
3349
3350  zero_range_exit:
3351         filemap_invalidate_unlock(inode->i_mapping);
3352         inode_unlock(inode);
3353         free_xid(xid);
3354         if (rc)
3355                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3356                               ses->Suid, offset, len, rc);
3357         else
3358                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3359                               ses->Suid, offset, len);
3360         return rc;
3361 }
3362
3363 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3364                             loff_t offset, loff_t len)
3365 {
3366         struct inode *inode = file_inode(file);
3367         struct cifsFileInfo *cfile = file->private_data;
3368         struct file_zero_data_information fsctl_buf;
3369         long rc;
3370         unsigned int xid;
3371         __u8 set_sparse = 1;
3372
3373         xid = get_xid();
3374
3375         inode_lock(inode);
3376         /* Need to make file sparse, if not already, before freeing range. */
3377         /* Consider adding equivalent for compressed since it could also work */
3378         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3379                 rc = -EOPNOTSUPP;
3380                 goto out;
3381         }
3382
3383         filemap_invalidate_lock(inode->i_mapping);
3384         /*
3385          * We implement the punch hole through ioctl, so we need remove the page
3386          * caches first, otherwise the data may be inconsistent with the server.
3387          */
3388         truncate_pagecache_range(inode, offset, offset + len - 1);
3389
3390         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3391
3392         fsctl_buf.FileOffset = cpu_to_le64(offset);
3393         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3394
3395         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3396                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3397                         (char *)&fsctl_buf,
3398                         sizeof(struct file_zero_data_information),
3399                         CIFSMaxBufSize, NULL, NULL);
3400         filemap_invalidate_unlock(inode->i_mapping);
3401 out:
3402         inode_unlock(inode);
3403         free_xid(xid);
3404         return rc;
3405 }
3406
3407 static int smb3_simple_fallocate_write_range(unsigned int xid,
3408                                              struct cifs_tcon *tcon,
3409                                              struct cifsFileInfo *cfile,
3410                                              loff_t off, loff_t len,
3411                                              char *buf)
3412 {
3413         struct cifs_io_parms io_parms = {0};
3414         int nbytes;
3415         int rc = 0;
3416         struct kvec iov[2];
3417
3418         io_parms.netfid = cfile->fid.netfid;
3419         io_parms.pid = current->tgid;
3420         io_parms.tcon = tcon;
3421         io_parms.persistent_fid = cfile->fid.persistent_fid;
3422         io_parms.volatile_fid = cfile->fid.volatile_fid;
3423
3424         while (len) {
3425                 io_parms.offset = off;
3426                 io_parms.length = len;
3427                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3428                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3429                 /* iov[0] is reserved for smb header */
3430                 iov[1].iov_base = buf;
3431                 iov[1].iov_len = io_parms.length;
3432                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3433                 if (rc)
3434                         break;
3435                 if (nbytes > len)
3436                         return -EINVAL;
3437                 buf += nbytes;
3438                 off += nbytes;
3439                 len -= nbytes;
3440         }
3441         return rc;
3442 }
3443
3444 static int smb3_simple_fallocate_range(unsigned int xid,
3445                                        struct cifs_tcon *tcon,
3446                                        struct cifsFileInfo *cfile,
3447                                        loff_t off, loff_t len)
3448 {
3449         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3450         u32 out_data_len;
3451         char *buf = NULL;
3452         loff_t l;
3453         int rc;
3454
3455         in_data.file_offset = cpu_to_le64(off);
3456         in_data.length = cpu_to_le64(len);
3457         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3458                         cfile->fid.volatile_fid,
3459                         FSCTL_QUERY_ALLOCATED_RANGES,
3460                         (char *)&in_data, sizeof(in_data),
3461                         1024 * sizeof(struct file_allocated_range_buffer),
3462                         (char **)&out_data, &out_data_len);
3463         if (rc)
3464                 goto out;
3465
3466         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3467         if (buf == NULL) {
3468                 rc = -ENOMEM;
3469                 goto out;
3470         }
3471
3472         tmp_data = out_data;
3473         while (len) {
3474                 /*
3475                  * The rest of the region is unmapped so write it all.
3476                  */
3477                 if (out_data_len == 0) {
3478                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3479                                                cfile, off, len, buf);
3480                         goto out;
3481                 }
3482
3483                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3484                         rc = -EINVAL;
3485                         goto out;
3486                 }
3487
3488                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3489                         /*
3490                          * We are at a hole. Write until the end of the region
3491                          * or until the next allocated data,
3492                          * whichever comes next.
3493                          */
3494                         l = le64_to_cpu(tmp_data->file_offset) - off;
3495                         if (len < l)
3496                                 l = len;
3497                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3498                                                cfile, off, l, buf);
3499                         if (rc)
3500                                 goto out;
3501                         off = off + l;
3502                         len = len - l;
3503                         if (len == 0)
3504                                 goto out;
3505                 }
3506                 /*
3507                  * We are at a section of allocated data, just skip forward
3508                  * until the end of the data or the end of the region
3509                  * we are supposed to fallocate, whichever comes first.
3510                  */
3511                 l = le64_to_cpu(tmp_data->length);
3512                 if (len < l)
3513                         l = len;
3514                 off += l;
3515                 len -= l;
3516
3517                 tmp_data = &tmp_data[1];
3518                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3519         }
3520
3521  out:
3522         kfree(out_data);
3523         kfree(buf);
3524         return rc;
3525 }
3526
3527
3528 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3529                             loff_t off, loff_t len, bool keep_size)
3530 {
3531         struct inode *inode;
3532         struct cifsInodeInfo *cifsi;
3533         struct cifsFileInfo *cfile = file->private_data;
3534         long rc = -EOPNOTSUPP;
3535         unsigned int xid;
3536         __le64 eof;
3537
3538         xid = get_xid();
3539
3540         inode = d_inode(cfile->dentry);
3541         cifsi = CIFS_I(inode);
3542
3543         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3544                                 tcon->ses->Suid, off, len);
3545         /* if file not oplocked can't be sure whether asking to extend size */
3546         if (!CIFS_CACHE_READ(cifsi))
3547                 if (keep_size == false) {
3548                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3549                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3550                         free_xid(xid);
3551                         return rc;
3552                 }
3553
3554         /*
3555          * Extending the file
3556          */
3557         if ((keep_size == false) && i_size_read(inode) < off + len) {
3558                 rc = inode_newsize_ok(inode, off + len);
3559                 if (rc)
3560                         goto out;
3561
3562                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3563                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3564
3565                 eof = cpu_to_le64(off + len);
3566                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3567                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3568                 if (rc == 0) {
3569                         cifsi->server_eof = off + len;
3570                         cifs_setsize(inode, off + len);
3571                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3572                         truncate_setsize(inode, off + len);
3573                 }
3574                 goto out;
3575         }
3576
3577         /*
3578          * Files are non-sparse by default so falloc may be a no-op
3579          * Must check if file sparse. If not sparse, and since we are not
3580          * extending then no need to do anything since file already allocated
3581          */
3582         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3583                 rc = 0;
3584                 goto out;
3585         }
3586
3587         if (keep_size == true) {
3588                 /*
3589                  * We can not preallocate pages beyond the end of the file
3590                  * in SMB2
3591                  */
3592                 if (off >= i_size_read(inode)) {
3593                         rc = 0;
3594                         goto out;
3595                 }
3596                 /*
3597                  * For fallocates that are partially beyond the end of file,
3598                  * clamp len so we only fallocate up to the end of file.
3599                  */
3600                 if (off + len > i_size_read(inode)) {
3601                         len = i_size_read(inode) - off;
3602                 }
3603         }
3604
3605         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3606                 /*
3607                  * At this point, we are trying to fallocate an internal
3608                  * regions of a sparse file. Since smb2 does not have a
3609                  * fallocate command we have two otions on how to emulate this.
3610                  * We can either turn the entire file to become non-sparse
3611                  * which we only do if the fallocate is for virtually
3612                  * the whole file,  or we can overwrite the region with zeroes
3613                  * using SMB2_write, which could be prohibitevly expensive
3614                  * if len is large.
3615                  */
3616                 /*
3617                  * We are only trying to fallocate a small region so
3618                  * just write it with zero.
3619                  */
3620                 if (len <= 1024 * 1024) {
3621                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3622                                                          off, len);
3623                         goto out;
3624                 }
3625
3626                 /*
3627                  * Check if falloc starts within first few pages of file
3628                  * and ends within a few pages of the end of file to
3629                  * ensure that most of file is being forced to be
3630                  * fallocated now. If so then setting whole file sparse
3631                  * ie potentially making a few extra pages at the beginning
3632                  * or end of the file non-sparse via set_sparse is harmless.
3633                  */
3634                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3635                         rc = -EOPNOTSUPP;
3636                         goto out;
3637                 }
3638         }
3639
3640         smb2_set_sparse(xid, tcon, cfile, inode, false);
3641         rc = 0;
3642
3643 out:
3644         if (rc)
3645                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3646                                 tcon->ses->Suid, off, len, rc);
3647         else
3648                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3649                                 tcon->ses->Suid, off, len);
3650
3651         free_xid(xid);
3652         return rc;
3653 }
3654
3655 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3656                             loff_t off, loff_t len)
3657 {
3658         int rc;
3659         unsigned int xid;
3660         struct inode *inode = file_inode(file);
3661         struct cifsFileInfo *cfile = file->private_data;
3662         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3663         __le64 eof;
3664         loff_t old_eof;
3665
3666         xid = get_xid();
3667
3668         inode_lock(inode);
3669
3670         old_eof = i_size_read(inode);
3671         if ((off >= old_eof) ||
3672             off + len >= old_eof) {
3673                 rc = -EINVAL;
3674                 goto out;
3675         }
3676
3677         filemap_invalidate_lock(inode->i_mapping);
3678         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3679         if (rc < 0)
3680                 goto out_2;
3681
3682         truncate_pagecache_range(inode, off, old_eof);
3683
3684         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3685                                   old_eof - off - len, off);
3686         if (rc < 0)
3687                 goto out_2;
3688
3689         eof = cpu_to_le64(old_eof - len);
3690         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3691                           cfile->fid.volatile_fid, cfile->pid, &eof);
3692         if (rc < 0)
3693                 goto out_2;
3694
3695         rc = 0;
3696
3697         cifsi->server_eof = i_size_read(inode) - len;
3698         truncate_setsize(inode, cifsi->server_eof);
3699         fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3700 out_2:
3701         filemap_invalidate_unlock(inode->i_mapping);
3702  out:
3703         inode_unlock(inode);
3704         free_xid(xid);
3705         return rc;
3706 }
3707
3708 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3709                               loff_t off, loff_t len)
3710 {
3711         int rc;
3712         unsigned int xid;
3713         struct cifsFileInfo *cfile = file->private_data;
3714         struct inode *inode = file_inode(file);
3715         __le64 eof;
3716         __u64  count, old_eof;
3717
3718         xid = get_xid();
3719
3720         inode_lock(inode);
3721
3722         old_eof = i_size_read(inode);
3723         if (off >= old_eof) {
3724                 rc = -EINVAL;
3725                 goto out;
3726         }
3727
3728         count = old_eof - off;
3729         eof = cpu_to_le64(old_eof + len);
3730
3731         filemap_invalidate_lock(inode->i_mapping);
3732         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3733         if (rc < 0)
3734                 goto out_2;
3735         truncate_pagecache_range(inode, off, old_eof);
3736
3737         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3738                           cfile->fid.volatile_fid, cfile->pid, &eof);
3739         if (rc < 0)
3740                 goto out_2;
3741
3742         truncate_setsize(inode, old_eof + len);
3743         fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));
3744
3745         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3746         if (rc < 0)
3747                 goto out_2;
3748
3749         rc = smb3_zero_data(file, tcon, off, len, xid);
3750         if (rc < 0)
3751                 goto out_2;
3752
3753         rc = 0;
3754 out_2:
3755         filemap_invalidate_unlock(inode->i_mapping);
3756  out:
3757         inode_unlock(inode);
3758         free_xid(xid);
3759         return rc;
3760 }
3761
3762 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3763 {
3764         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3765         struct cifsInodeInfo *cifsi;
3766         struct inode *inode;
3767         int rc = 0;
3768         struct file_allocated_range_buffer in_data, *out_data = NULL;
3769         u32 out_data_len;
3770         unsigned int xid;
3771
3772         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3773                 return generic_file_llseek(file, offset, whence);
3774
3775         inode = d_inode(cfile->dentry);
3776         cifsi = CIFS_I(inode);
3777
3778         if (offset < 0 || offset >= i_size_read(inode))
3779                 return -ENXIO;
3780
3781         xid = get_xid();
3782         /*
3783          * We need to be sure that all dirty pages are written as they
3784          * might fill holes on the server.
3785          * Note that we also MUST flush any written pages since at least
3786          * some servers (Windows2016) will not reflect recent writes in
3787          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3788          */
3789         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3790         if (wrcfile) {
3791                 filemap_write_and_wait(inode->i_mapping);
3792                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3793                 cifsFileInfo_put(wrcfile);
3794         }
3795
3796         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3797                 if (whence == SEEK_HOLE)
3798                         offset = i_size_read(inode);
3799                 goto lseek_exit;
3800         }
3801
3802         in_data.file_offset = cpu_to_le64(offset);
3803         in_data.length = cpu_to_le64(i_size_read(inode));
3804
3805         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3806                         cfile->fid.volatile_fid,
3807                         FSCTL_QUERY_ALLOCATED_RANGES,
3808                         (char *)&in_data, sizeof(in_data),
3809                         sizeof(struct file_allocated_range_buffer),
3810                         (char **)&out_data, &out_data_len);
3811         if (rc == -E2BIG)
3812                 rc = 0;
3813         if (rc)
3814                 goto lseek_exit;
3815
3816         if (whence == SEEK_HOLE && out_data_len == 0)
3817                 goto lseek_exit;
3818
3819         if (whence == SEEK_DATA && out_data_len == 0) {
3820                 rc = -ENXIO;
3821                 goto lseek_exit;
3822         }
3823
3824         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3825                 rc = -EINVAL;
3826                 goto lseek_exit;
3827         }
3828         if (whence == SEEK_DATA) {
3829                 offset = le64_to_cpu(out_data->file_offset);
3830                 goto lseek_exit;
3831         }
3832         if (offset < le64_to_cpu(out_data->file_offset))
3833                 goto lseek_exit;
3834
3835         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3836
3837  lseek_exit:
3838         free_xid(xid);
3839         kfree(out_data);
3840         if (!rc)
3841                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3842         else
3843                 return rc;
3844 }
3845
3846 static int smb3_fiemap(struct cifs_tcon *tcon,
3847                        struct cifsFileInfo *cfile,
3848                        struct fiemap_extent_info *fei, u64 start, u64 len)
3849 {
3850         unsigned int xid;
3851         struct file_allocated_range_buffer in_data, *out_data;
3852         u32 out_data_len;
3853         int i, num, rc, flags, last_blob;
3854         u64 next;
3855
3856         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3857         if (rc)
3858                 return rc;
3859
3860         xid = get_xid();
3861  again:
3862         in_data.file_offset = cpu_to_le64(start);
3863         in_data.length = cpu_to_le64(len);
3864
3865         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3866                         cfile->fid.volatile_fid,
3867                         FSCTL_QUERY_ALLOCATED_RANGES,
3868                         (char *)&in_data, sizeof(in_data),
3869                         1024 * sizeof(struct file_allocated_range_buffer),
3870                         (char **)&out_data, &out_data_len);
3871         if (rc == -E2BIG) {
3872                 last_blob = 0;
3873                 rc = 0;
3874         } else
3875                 last_blob = 1;
3876         if (rc)
3877                 goto out;
3878
3879         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3880                 rc = -EINVAL;
3881                 goto out;
3882         }
3883         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3884                 rc = -EINVAL;
3885                 goto out;
3886         }
3887
3888         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3889         for (i = 0; i < num; i++) {
3890                 flags = 0;
3891                 if (i == num - 1 && last_blob)
3892                         flags |= FIEMAP_EXTENT_LAST;
3893
3894                 rc = fiemap_fill_next_extent(fei,
3895                                 le64_to_cpu(out_data[i].file_offset),
3896                                 le64_to_cpu(out_data[i].file_offset),
3897                                 le64_to_cpu(out_data[i].length),
3898                                 flags);
3899                 if (rc < 0)
3900                         goto out;
3901                 if (rc == 1) {
3902                         rc = 0;
3903                         goto out;
3904                 }
3905         }
3906
3907         if (!last_blob) {
3908                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3909                   le64_to_cpu(out_data[num - 1].length);
3910                 len = len - (next - start);
3911                 start = next;
3912                 goto again;
3913         }
3914
3915  out:
3916         free_xid(xid);
3917         kfree(out_data);
3918         return rc;
3919 }
3920
3921 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3922                            loff_t off, loff_t len)
3923 {
3924         /* KEEP_SIZE already checked for by do_fallocate */
3925         if (mode & FALLOC_FL_PUNCH_HOLE)
3926                 return smb3_punch_hole(file, tcon, off, len);
3927         else if (mode & FALLOC_FL_ZERO_RANGE) {
3928                 if (mode & FALLOC_FL_KEEP_SIZE)
3929                         return smb3_zero_range(file, tcon, off, len, true);
3930                 return smb3_zero_range(file, tcon, off, len, false);
3931         } else if (mode == FALLOC_FL_KEEP_SIZE)
3932                 return smb3_simple_falloc(file, tcon, off, len, true);
3933         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3934                 return smb3_collapse_range(file, tcon, off, len);
3935         else if (mode == FALLOC_FL_INSERT_RANGE)
3936                 return smb3_insert_range(file, tcon, off, len);
3937         else if (mode == 0)
3938                 return smb3_simple_falloc(file, tcon, off, len, false);
3939
3940         return -EOPNOTSUPP;
3941 }
3942
3943 static void
3944 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3945                       struct cifsInodeInfo *cinode, __u32 oplock,
3946                       unsigned int epoch, bool *purge_cache)
3947 {
3948         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3949 }
3950
3951 static void
3952 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3953                        unsigned int epoch, bool *purge_cache);
3954
3955 static void
3956 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3957                        struct cifsInodeInfo *cinode, __u32 oplock,
3958                        unsigned int epoch, bool *purge_cache)
3959 {
3960         unsigned int old_state = cinode->oplock;
3961         unsigned int old_epoch = cinode->epoch;
3962         unsigned int new_state;
3963
3964         if (epoch > old_epoch) {
3965                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3966                 cinode->epoch = epoch;
3967         }
3968
3969         new_state = cinode->oplock;
3970         *purge_cache = false;
3971
3972         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3973             (new_state & CIFS_CACHE_READ_FLG) == 0)
3974                 *purge_cache = true;
3975         else if (old_state == new_state && (epoch - old_epoch > 1))
3976                 *purge_cache = true;
3977 }
3978
3979 static void
3980 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3981                       unsigned int epoch, bool *purge_cache)
3982 {
3983         oplock &= 0xFF;
3984         cinode->lease_granted = false;
3985         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3986                 return;
3987         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3988                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3989                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3990                          &cinode->netfs.inode);
3991         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3992                 cinode->oplock = CIFS_CACHE_RW_FLG;
3993                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3994                          &cinode->netfs.inode);
3995         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3996                 cinode->oplock = CIFS_CACHE_READ_FLG;
3997                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3998                          &cinode->netfs.inode);
3999         } else
4000                 cinode->oplock = 0;
4001 }
4002
4003 static void
4004 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4005                        unsigned int epoch, bool *purge_cache)
4006 {
4007         char message[5] = {0};
4008         unsigned int new_oplock = 0;
4009
4010         oplock &= 0xFF;
4011         cinode->lease_granted = true;
4012         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4013                 return;
4014
4015         /* Check if the server granted an oplock rather than a lease */
4016         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4017                 return smb2_set_oplock_level(cinode, oplock, epoch,
4018                                              purge_cache);
4019
4020         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4021                 new_oplock |= CIFS_CACHE_READ_FLG;
4022                 strcat(message, "R");
4023         }
4024         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4025                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4026                 strcat(message, "H");
4027         }
4028         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4029                 new_oplock |= CIFS_CACHE_WRITE_FLG;
4030                 strcat(message, "W");
4031         }
4032         if (!new_oplock)
4033                 strncpy(message, "None", sizeof(message));
4034
4035         cinode->oplock = new_oplock;
4036         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4037                  &cinode->netfs.inode);
4038 }
4039
4040 static void
4041 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4042                       unsigned int epoch, bool *purge_cache)
4043 {
4044         unsigned int old_oplock = cinode->oplock;
4045
4046         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4047
4048         if (purge_cache) {
4049                 *purge_cache = false;
4050                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4051                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4052                             (epoch - cinode->epoch > 0))
4053                                 *purge_cache = true;
4054                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4055                                  (epoch - cinode->epoch > 1))
4056                                 *purge_cache = true;
4057                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4058                                  (epoch - cinode->epoch > 1))
4059                                 *purge_cache = true;
4060                         else if (cinode->oplock == 0 &&
4061                                  (epoch - cinode->epoch > 0))
4062                                 *purge_cache = true;
4063                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4064                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4065                             (epoch - cinode->epoch > 0))
4066                                 *purge_cache = true;
4067                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4068                                  (epoch - cinode->epoch > 1))
4069                                 *purge_cache = true;
4070                 }
4071                 cinode->epoch = epoch;
4072         }
4073 }
4074
4075 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4076 static bool
4077 smb2_is_read_op(__u32 oplock)
4078 {
4079         return oplock == SMB2_OPLOCK_LEVEL_II;
4080 }
4081 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4082
4083 static bool
4084 smb21_is_read_op(__u32 oplock)
4085 {
4086         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4087                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4088 }
4089
4090 static __le32
4091 map_oplock_to_lease(u8 oplock)
4092 {
4093         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4094                 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4095         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4096                 return SMB2_LEASE_READ_CACHING_LE;
4097         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4098                 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4099                        SMB2_LEASE_WRITE_CACHING_LE;
4100         return 0;
4101 }
4102
4103 static char *
4104 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4105 {
4106         struct create_lease *buf;
4107
4108         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4109         if (!buf)
4110                 return NULL;
4111
4112         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4113         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4114
4115         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4116                                         (struct create_lease, lcontext));
4117         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4118         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4119                                 (struct create_lease, Name));
4120         buf->ccontext.NameLength = cpu_to_le16(4);
4121         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4122         buf->Name[0] = 'R';
4123         buf->Name[1] = 'q';
4124         buf->Name[2] = 'L';
4125         buf->Name[3] = 's';
4126         return (char *)buf;
4127 }
4128
4129 static char *
4130 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4131 {
4132         struct create_lease_v2 *buf;
4133
4134         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4135         if (!buf)
4136                 return NULL;
4137
4138         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4139         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4140
4141         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4142                                         (struct create_lease_v2, lcontext));
4143         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4144         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4145                                 (struct create_lease_v2, Name));
4146         buf->ccontext.NameLength = cpu_to_le16(4);
4147         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4148         buf->Name[0] = 'R';
4149         buf->Name[1] = 'q';
4150         buf->Name[2] = 'L';
4151         buf->Name[3] = 's';
4152         return (char *)buf;
4153 }
4154
4155 static __u8
4156 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4157 {
4158         struct create_lease *lc = (struct create_lease *)buf;
4159
4160         *epoch = 0; /* not used */
4161         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4162                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4163         return le32_to_cpu(lc->lcontext.LeaseState);
4164 }
4165
4166 static __u8
4167 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4168 {
4169         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4170
4171         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4172         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4173                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4174         if (lease_key)
4175                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4176         return le32_to_cpu(lc->lcontext.LeaseState);
4177 }
4178
4179 static unsigned int
4180 smb2_wp_retry_size(struct inode *inode)
4181 {
4182         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4183                      SMB2_MAX_BUFFER_SIZE);
4184 }
4185
4186 static bool
4187 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4188 {
4189         return !cfile->invalidHandle;
4190 }
4191
4192 static void
4193 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4194                    struct smb_rqst *old_rq, __le16 cipher_type)
4195 {
4196         struct smb2_hdr *shdr =
4197                         (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4198
4199         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4200         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4201         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4202         tr_hdr->Flags = cpu_to_le16(0x01);
4203         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4204             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4205                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4206         else
4207                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4208         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4209 }
4210
4211 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4212                                  int num_rqst, const u8 *sig, u8 **iv,
4213                                  struct aead_request **req, struct sg_table *sgt,
4214                                  unsigned int *num_sgs, size_t *sensitive_size)
4215 {
4216         unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4217         unsigned int iv_size = crypto_aead_ivsize(tfm);
4218         unsigned int len;
4219         u8 *p;
4220
4221         *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4222         if (IS_ERR_VALUE((long)(int)*num_sgs))
4223                 return ERR_PTR(*num_sgs);
4224
4225         len = iv_size;
4226         len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4227         len = ALIGN(len, crypto_tfm_ctx_alignment());
4228         len += req_size;
4229         len = ALIGN(len, __alignof__(struct scatterlist));
4230         len += array_size(*num_sgs, sizeof(struct scatterlist));
4231         *sensitive_size = len;
4232
4233         p = kvzalloc(len, GFP_NOFS);
4234         if (!p)
4235                 return ERR_PTR(-ENOMEM);
4236
4237         *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4238         *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4239                                                 crypto_tfm_ctx_alignment());
4240         sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4241                                                    __alignof__(struct scatterlist));
4242         return p;
4243 }
4244
4245 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4246                                int num_rqst, const u8 *sig, u8 **iv,
4247                                struct aead_request **req, struct scatterlist **sgl,
4248                                size_t *sensitive_size)
4249 {
4250         struct sg_table sgtable = {};
4251         unsigned int skip, num_sgs, i, j;
4252         ssize_t rc;
4253         void *p;
4254
4255         p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4256                                 &num_sgs, sensitive_size);
4257         if (IS_ERR(p))
4258                 return ERR_CAST(p);
4259
4260         sg_init_marker(sgtable.sgl, num_sgs);
4261
4262         /*
4263          * The first rqst has a transform header where the
4264          * first 20 bytes are not part of the encrypted blob.
4265          */
4266         skip = 20;
4267
4268         for (i = 0; i < num_rqst; i++) {
4269                 struct iov_iter *iter = &rqst[i].rq_iter;
4270                 size_t count = iov_iter_count(iter);
4271
4272                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4273                         cifs_sg_set_buf(&sgtable,
4274                                         rqst[i].rq_iov[j].iov_base + skip,
4275                                         rqst[i].rq_iov[j].iov_len - skip);
4276
4277                         /* See the above comment on the 'skip' assignment */
4278                         skip = 0;
4279                 }
4280                 sgtable.orig_nents = sgtable.nents;
4281
4282                 rc = extract_iter_to_sg(iter, count, &sgtable,
4283                                         num_sgs - sgtable.nents, 0);
4284                 iov_iter_revert(iter, rc);
4285                 sgtable.orig_nents = sgtable.nents;
4286         }
4287
4288         cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4289         sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4290         *sgl = sgtable.sgl;
4291         return p;
4292 }
4293
4294 static int
4295 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4296 {
4297         struct TCP_Server_Info *pserver;
4298         struct cifs_ses *ses;
4299         u8 *ses_enc_key;
4300
4301         /* If server is a channel, select the primary channel */
4302         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4303
4304         spin_lock(&cifs_tcp_ses_lock);
4305         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4306                 if (ses->Suid == ses_id) {
4307                         spin_lock(&ses->ses_lock);
4308                         ses_enc_key = enc ? ses->smb3encryptionkey :
4309                                 ses->smb3decryptionkey;
4310                         memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4311                         spin_unlock(&ses->ses_lock);
4312                         spin_unlock(&cifs_tcp_ses_lock);
4313                         return 0;
4314                 }
4315         }
4316         spin_unlock(&cifs_tcp_ses_lock);
4317
4318         trace_smb3_ses_not_found(ses_id);
4319
4320         return -EAGAIN;
4321 }
4322 /*
4323  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4324  * iov[0]   - transform header (associate data),
4325  * iov[1-N] - SMB2 header and pages - data to encrypt.
4326  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4327  * untouched.
4328  */
4329 static int
4330 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4331               struct smb_rqst *rqst, int enc)
4332 {
4333         struct smb2_transform_hdr *tr_hdr =
4334                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4335         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4336         int rc = 0;
4337         struct scatterlist *sg;
4338         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4339         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4340         struct aead_request *req;
4341         u8 *iv;
4342         DECLARE_CRYPTO_WAIT(wait);
4343         struct crypto_aead *tfm;
4344         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4345         void *creq;
4346         size_t sensitive_size;
4347
4348         rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4349         if (rc) {
4350                 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4351                          enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4352                 return rc;
4353         }
4354
4355         rc = smb3_crypto_aead_allocate(server);
4356         if (rc) {
4357                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4358                 return rc;
4359         }
4360
4361         tfm = enc ? server->secmech.enc : server->secmech.dec;
4362
4363         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4364                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4365                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4366         else
4367                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4368
4369         if (rc) {
4370                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4371                 return rc;
4372         }
4373
4374         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4375         if (rc) {
4376                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4377                 return rc;
4378         }
4379
4380         creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4381                                  &sensitive_size);
4382         if (IS_ERR(creq))
4383                 return PTR_ERR(creq);
4384
4385         if (!enc) {
4386                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4387                 crypt_len += SMB2_SIGNATURE_SIZE;
4388         }
4389
4390         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4391             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4392                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4393         else {
4394                 iv[0] = 3;
4395                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4396         }
4397
4398         aead_request_set_tfm(req, tfm);
4399         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4400         aead_request_set_ad(req, assoc_data_len);
4401
4402         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4403                                   crypto_req_done, &wait);
4404
4405         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4406                                 : crypto_aead_decrypt(req), &wait);
4407
4408         if (!rc && enc)
4409                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4410
4411         kvfree_sensitive(creq, sensitive_size);
4412         return rc;
4413 }
4414
4415 /*
4416  * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4417  */
4418 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4419 {
4420         struct folio *folio;
4421
4422         XA_STATE(xas, buffer, 0);
4423
4424         rcu_read_lock();
4425         xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4426                 folio_put(folio);
4427         }
4428         rcu_read_unlock();
4429         xa_destroy(buffer);
4430 }
4431
4432 void
4433 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4434 {
4435         int i;
4436
4437         for (i = 0; i < num_rqst; i++)
4438                 if (!xa_empty(&rqst[i].rq_buffer))
4439                         cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4440 }
4441
4442 /*
4443  * This function will initialize new_rq and encrypt the content.
4444  * The first entry, new_rq[0], only contains a single iov which contains
4445  * a smb2_transform_hdr and is pre-allocated by the caller.
4446  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4447  *
4448  * The end result is an array of smb_rqst structures where the first structure
4449  * only contains a single iov for the transform header which we then can pass
4450  * to crypt_message().
4451  *
4452  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4453  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4454  */
4455 static int
4456 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4457                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4458 {
4459         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4460         struct page *page;
4461         unsigned int orig_len = 0;
4462         int i, j;
4463         int rc = -ENOMEM;
4464
4465         for (i = 1; i < num_rqst; i++) {
4466                 struct smb_rqst *old = &old_rq[i - 1];
4467                 struct smb_rqst *new = &new_rq[i];
4468                 struct xarray *buffer = &new->rq_buffer;
4469                 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4470
4471                 orig_len += smb_rqst_len(server, old);
4472                 new->rq_iov = old->rq_iov;
4473                 new->rq_nvec = old->rq_nvec;
4474
4475                 xa_init(buffer);
4476
4477                 if (size > 0) {
4478                         unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4479
4480                         for (j = 0; j < npages; j++) {
4481                                 void *o;
4482
4483                                 rc = -ENOMEM;
4484                                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4485                                 if (!page)
4486                                         goto err_free;
4487                                 page->index = j;
4488                                 o = xa_store(buffer, j, page, GFP_KERNEL);
4489                                 if (xa_is_err(o)) {
4490                                         rc = xa_err(o);
4491                                         put_page(page);
4492                                         goto err_free;
4493                                 }
4494
4495                                 xa_set_mark(buffer, j, XA_MARK_0);
4496
4497                                 seg = min_t(size_t, size - copied, PAGE_SIZE);
4498                                 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4499                                         rc = -EFAULT;
4500                                         goto err_free;
4501                                 }
4502                                 copied += seg;
4503                         }
4504                         iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4505                                         buffer, 0, size);
4506                         new->rq_iter_size = size;
4507                 }
4508         }
4509
4510         /* fill the 1st iov with a transform header */
4511         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4512
4513         rc = crypt_message(server, num_rqst, new_rq, 1);
4514         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4515         if (rc)
4516                 goto err_free;
4517
4518         return rc;
4519
4520 err_free:
4521         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4522         return rc;
4523 }
4524
4525 static int
4526 smb3_is_transform_hdr(void *buf)
4527 {
4528         struct smb2_transform_hdr *trhdr = buf;
4529
4530         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4531 }
4532
4533 static int
4534 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4535                  unsigned int buf_data_size, struct iov_iter *iter,
4536                  bool is_offloaded)
4537 {
4538         struct kvec iov[2];
4539         struct smb_rqst rqst = {NULL};
4540         size_t iter_size = 0;
4541         int rc;
4542
4543         iov[0].iov_base = buf;
4544         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4545         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4546         iov[1].iov_len = buf_data_size;
4547
4548         rqst.rq_iov = iov;
4549         rqst.rq_nvec = 2;
4550         if (iter) {
4551                 rqst.rq_iter = *iter;
4552                 rqst.rq_iter_size = iov_iter_count(iter);
4553                 iter_size = iov_iter_count(iter);
4554         }
4555
4556         rc = crypt_message(server, 1, &rqst, 0);
4557         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4558
4559         if (rc)
4560                 return rc;
4561
4562         memmove(buf, iov[1].iov_base, buf_data_size);
4563
4564         if (!is_offloaded)
4565                 server->total_read = buf_data_size + iter_size;
4566
4567         return rc;
4568 }
4569
4570 static int
4571 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4572                         unsigned int skip, struct iov_iter *iter)
4573 {
4574         struct page *page;
4575         unsigned long index;
4576
4577         xa_for_each(pages, index, page) {
4578                 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4579
4580                 n = copy_page_to_iter(page, skip, len, iter);
4581                 if (n != len) {
4582                         cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4583                         return -EIO;
4584                 }
4585                 data_size -= n;
4586                 skip = 0;
4587         }
4588
4589         return 0;
4590 }
4591
4592 static int
4593 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4594                  char *buf, unsigned int buf_len, struct xarray *pages,
4595                  unsigned int pages_len, bool is_offloaded)
4596 {
4597         unsigned int data_offset;
4598         unsigned int data_len;
4599         unsigned int cur_off;
4600         unsigned int cur_page_idx;
4601         unsigned int pad_len;
4602         struct cifs_readdata *rdata = mid->callback_data;
4603         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4604         int length;
4605         bool use_rdma_mr = false;
4606
4607         if (shdr->Command != SMB2_READ) {
4608                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4609                 return -EOPNOTSUPP;
4610         }
4611
4612         if (server->ops->is_session_expired &&
4613             server->ops->is_session_expired(buf)) {
4614                 if (!is_offloaded)
4615                         cifs_reconnect(server, true);
4616                 return -1;
4617         }
4618
4619         if (server->ops->is_status_pending &&
4620                         server->ops->is_status_pending(buf, server))
4621                 return -1;
4622
4623         /* set up first two iov to get credits */
4624         rdata->iov[0].iov_base = buf;
4625         rdata->iov[0].iov_len = 0;
4626         rdata->iov[1].iov_base = buf;
4627         rdata->iov[1].iov_len =
4628                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4629         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4630                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4631         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4632                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4633
4634         rdata->result = server->ops->map_error(buf, true);
4635         if (rdata->result != 0) {
4636                 cifs_dbg(FYI, "%s: server returned error %d\n",
4637                          __func__, rdata->result);
4638                 /* normal error on read response */
4639                 if (is_offloaded)
4640                         mid->mid_state = MID_RESPONSE_RECEIVED;
4641                 else
4642                         dequeue_mid(mid, false);
4643                 return 0;
4644         }
4645
4646         data_offset = server->ops->read_data_offset(buf);
4647 #ifdef CONFIG_CIFS_SMB_DIRECT
4648         use_rdma_mr = rdata->mr;
4649 #endif
4650         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4651
4652         if (data_offset < server->vals->read_rsp_size) {
4653                 /*
4654                  * win2k8 sometimes sends an offset of 0 when the read
4655                  * is beyond the EOF. Treat it as if the data starts just after
4656                  * the header.
4657                  */
4658                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4659                          __func__, data_offset);
4660                 data_offset = server->vals->read_rsp_size;
4661         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4662                 /* data_offset is beyond the end of smallbuf */
4663                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4664                          __func__, data_offset);
4665                 rdata->result = -EIO;
4666                 if (is_offloaded)
4667                         mid->mid_state = MID_RESPONSE_MALFORMED;
4668                 else
4669                         dequeue_mid(mid, rdata->result);
4670                 return 0;
4671         }
4672
4673         pad_len = data_offset - server->vals->read_rsp_size;
4674
4675         if (buf_len <= data_offset) {
4676                 /* read response payload is in pages */
4677                 cur_page_idx = pad_len / PAGE_SIZE;
4678                 cur_off = pad_len % PAGE_SIZE;
4679
4680                 if (cur_page_idx != 0) {
4681                         /* data offset is beyond the 1st page of response */
4682                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4683                                  __func__, data_offset);
4684                         rdata->result = -EIO;
4685                         if (is_offloaded)
4686                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4687                         else
4688                                 dequeue_mid(mid, rdata->result);
4689                         return 0;
4690                 }
4691
4692                 if (data_len > pages_len - pad_len) {
4693                         /* data_len is corrupt -- discard frame */
4694                         rdata->result = -EIO;
4695                         if (is_offloaded)
4696                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4697                         else
4698                                 dequeue_mid(mid, rdata->result);
4699                         return 0;
4700                 }
4701
4702                 /* Copy the data to the output I/O iterator. */
4703                 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4704                                                         cur_off, &rdata->iter);
4705                 if (rdata->result != 0) {
4706                         if (is_offloaded)
4707                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4708                         else
4709                                 dequeue_mid(mid, rdata->result);
4710                         return 0;
4711                 }
4712                 rdata->got_bytes = pages_len;
4713
4714         } else if (buf_len >= data_offset + data_len) {
4715                 /* read response payload is in buf */
4716                 WARN_ONCE(pages && !xa_empty(pages),
4717                           "read data can be either in buf or in pages");
4718                 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4719                 if (length < 0)
4720                         return length;
4721                 rdata->got_bytes = data_len;
4722         } else {
4723                 /* read response payload cannot be in both buf and pages */
4724                 WARN_ONCE(1, "buf can not contain only a part of read data");
4725                 rdata->result = -EIO;
4726                 if (is_offloaded)
4727                         mid->mid_state = MID_RESPONSE_MALFORMED;
4728                 else
4729                         dequeue_mid(mid, rdata->result);
4730                 return 0;
4731         }
4732
4733         if (is_offloaded)
4734                 mid->mid_state = MID_RESPONSE_RECEIVED;
4735         else
4736                 dequeue_mid(mid, false);
4737         return 0;
4738 }
4739
4740 struct smb2_decrypt_work {
4741         struct work_struct decrypt;
4742         struct TCP_Server_Info *server;
4743         struct xarray buffer;
4744         char *buf;
4745         unsigned int len;
4746 };
4747
4748
4749 static void smb2_decrypt_offload(struct work_struct *work)
4750 {
4751         struct smb2_decrypt_work *dw = container_of(work,
4752                                 struct smb2_decrypt_work, decrypt);
4753         int rc;
4754         struct mid_q_entry *mid;
4755         struct iov_iter iter;
4756
4757         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4758         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4759                               &iter, true);
4760         if (rc) {
4761                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4762                 goto free_pages;
4763         }
4764
4765         dw->server->lstrp = jiffies;
4766         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4767         if (mid == NULL)
4768                 cifs_dbg(FYI, "mid not found\n");
4769         else {
4770                 mid->decrypted = true;
4771                 rc = handle_read_data(dw->server, mid, dw->buf,
4772                                       dw->server->vals->read_rsp_size,
4773                                       &dw->buffer, dw->len,
4774                                       true);
4775                 if (rc >= 0) {
4776 #ifdef CONFIG_CIFS_STATS2
4777                         mid->when_received = jiffies;
4778 #endif
4779                         if (dw->server->ops->is_network_name_deleted)
4780                                 dw->server->ops->is_network_name_deleted(dw->buf,
4781                                                                          dw->server);
4782
4783                         mid->callback(mid);
4784                 } else {
4785                         spin_lock(&dw->server->srv_lock);
4786                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4787                                 spin_lock(&dw->server->mid_lock);
4788                                 mid->mid_state = MID_RETRY_NEEDED;
4789                                 spin_unlock(&dw->server->mid_lock);
4790                                 spin_unlock(&dw->server->srv_lock);
4791                                 mid->callback(mid);
4792                         } else {
4793                                 spin_lock(&dw->server->mid_lock);
4794                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4795                                 mid->mid_flags &= ~(MID_DELETED);
4796                                 list_add_tail(&mid->qhead,
4797                                         &dw->server->pending_mid_q);
4798                                 spin_unlock(&dw->server->mid_lock);
4799                                 spin_unlock(&dw->server->srv_lock);
4800                         }
4801                 }
4802                 release_mid(mid);
4803         }
4804
4805 free_pages:
4806         cifs_clear_xarray_buffer(&dw->buffer);
4807         cifs_small_buf_release(dw->buf);
4808         kfree(dw);
4809 }
4810
4811
4812 static int
4813 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4814                        int *num_mids)
4815 {
4816         struct page *page;
4817         char *buf = server->smallbuf;
4818         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4819         struct iov_iter iter;
4820         unsigned int len, npages;
4821         unsigned int buflen = server->pdu_size;
4822         int rc;
4823         int i = 0;
4824         struct smb2_decrypt_work *dw;
4825
4826         dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4827         if (!dw)
4828                 return -ENOMEM;
4829         xa_init(&dw->buffer);
4830         INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4831         dw->server = server;
4832
4833         *num_mids = 1;
4834         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4835                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4836
4837         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4838         if (rc < 0)
4839                 goto free_dw;
4840         server->total_read += rc;
4841
4842         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4843                 server->vals->read_rsp_size;
4844         dw->len = len;
4845         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4846
4847         rc = -ENOMEM;
4848         for (; i < npages; i++) {
4849                 void *old;
4850
4851                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4852                 if (!page)
4853                         goto discard_data;
4854                 page->index = i;
4855                 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4856                 if (xa_is_err(old)) {
4857                         rc = xa_err(old);
4858                         put_page(page);
4859                         goto discard_data;
4860                 }
4861                 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4862         }
4863
4864         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4865
4866         /* Read the data into the buffer and clear excess bufferage. */
4867         rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4868         if (rc < 0)
4869                 goto discard_data;
4870
4871         server->total_read += rc;
4872         if (rc < npages * PAGE_SIZE)
4873                 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4874         iov_iter_revert(&iter, npages * PAGE_SIZE);
4875         iov_iter_truncate(&iter, dw->len);
4876
4877         rc = cifs_discard_remaining_data(server);
4878         if (rc)
4879                 goto free_pages;
4880
4881         /*
4882          * For large reads, offload to different thread for better performance,
4883          * use more cores decrypting which can be expensive
4884          */
4885
4886         if ((server->min_offload) && (server->in_flight > 1) &&
4887             (server->pdu_size >= server->min_offload)) {
4888                 dw->buf = server->smallbuf;
4889                 server->smallbuf = (char *)cifs_small_buf_get();
4890
4891                 queue_work(decrypt_wq, &dw->decrypt);
4892                 *num_mids = 0; /* worker thread takes care of finding mid */
4893                 return -1;
4894         }
4895
4896         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4897                               &iter, false);
4898         if (rc)
4899                 goto free_pages;
4900
4901         *mid = smb2_find_mid(server, buf);
4902         if (*mid == NULL) {
4903                 cifs_dbg(FYI, "mid not found\n");
4904         } else {
4905                 cifs_dbg(FYI, "mid found\n");
4906                 (*mid)->decrypted = true;
4907                 rc = handle_read_data(server, *mid, buf,
4908                                       server->vals->read_rsp_size,
4909                                       &dw->buffer, dw->len, false);
4910                 if (rc >= 0) {
4911                         if (server->ops->is_network_name_deleted) {
4912                                 server->ops->is_network_name_deleted(buf,
4913                                                                 server);
4914                         }
4915                 }
4916         }
4917
4918 free_pages:
4919         cifs_clear_xarray_buffer(&dw->buffer);
4920 free_dw:
4921         kfree(dw);
4922         return rc;
4923 discard_data:
4924         cifs_discard_remaining_data(server);
4925         goto free_pages;
4926 }
4927
4928 static int
4929 receive_encrypted_standard(struct TCP_Server_Info *server,
4930                            struct mid_q_entry **mids, char **bufs,
4931                            int *num_mids)
4932 {
4933         int ret, length;
4934         char *buf = server->smallbuf;
4935         struct smb2_hdr *shdr;
4936         unsigned int pdu_length = server->pdu_size;
4937         unsigned int buf_size;
4938         struct mid_q_entry *mid_entry;
4939         int next_is_large;
4940         char *next_buffer = NULL;
4941
4942         *num_mids = 0;
4943
4944         /* switch to large buffer if too big for a small one */
4945         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4946                 server->large_buf = true;
4947                 memcpy(server->bigbuf, buf, server->total_read);
4948                 buf = server->bigbuf;
4949         }
4950
4951         /* now read the rest */
4952         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4953                                 pdu_length - HEADER_SIZE(server) + 1);
4954         if (length < 0)
4955                 return length;
4956         server->total_read += length;
4957
4958         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4959         length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4960         if (length)
4961                 return length;
4962
4963         next_is_large = server->large_buf;
4964 one_more:
4965         shdr = (struct smb2_hdr *)buf;
4966         if (shdr->NextCommand) {
4967                 if (next_is_large)
4968                         next_buffer = (char *)cifs_buf_get();
4969                 else
4970                         next_buffer = (char *)cifs_small_buf_get();
4971                 memcpy(next_buffer,
4972                        buf + le32_to_cpu(shdr->NextCommand),
4973                        pdu_length - le32_to_cpu(shdr->NextCommand));
4974         }
4975
4976         mid_entry = smb2_find_mid(server, buf);
4977         if (mid_entry == NULL)
4978                 cifs_dbg(FYI, "mid not found\n");
4979         else {
4980                 cifs_dbg(FYI, "mid found\n");
4981                 mid_entry->decrypted = true;
4982                 mid_entry->resp_buf_size = server->pdu_size;
4983         }
4984
4985         if (*num_mids >= MAX_COMPOUND) {
4986                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4987                 return -1;
4988         }
4989         bufs[*num_mids] = buf;
4990         mids[(*num_mids)++] = mid_entry;
4991
4992         if (mid_entry && mid_entry->handle)
4993                 ret = mid_entry->handle(server, mid_entry);
4994         else
4995                 ret = cifs_handle_standard(server, mid_entry);
4996
4997         if (ret == 0 && shdr->NextCommand) {
4998                 pdu_length -= le32_to_cpu(shdr->NextCommand);
4999                 server->large_buf = next_is_large;
5000                 if (next_is_large)
5001                         server->bigbuf = buf = next_buffer;
5002                 else
5003                         server->smallbuf = buf = next_buffer;
5004                 goto one_more;
5005         } else if (ret != 0) {
5006                 /*
5007                  * ret != 0 here means that we didn't get to handle_mid() thus
5008                  * server->smallbuf and server->bigbuf are still valid. We need
5009                  * to free next_buffer because it is not going to be used
5010                  * anywhere.
5011                  */
5012                 if (next_is_large)
5013                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5014                 else
5015                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5016         }
5017
5018         return ret;
5019 }
5020
5021 static int
5022 smb3_receive_transform(struct TCP_Server_Info *server,
5023                        struct mid_q_entry **mids, char **bufs, int *num_mids)
5024 {
5025         char *buf = server->smallbuf;
5026         unsigned int pdu_length = server->pdu_size;
5027         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5028         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5029
5030         if (pdu_length < sizeof(struct smb2_transform_hdr) +
5031                                                 sizeof(struct smb2_hdr)) {
5032                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5033                          pdu_length);
5034                 cifs_reconnect(server, true);
5035                 return -ECONNABORTED;
5036         }
5037
5038         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5039                 cifs_server_dbg(VFS, "Transform message is broken\n");
5040                 cifs_reconnect(server, true);
5041                 return -ECONNABORTED;
5042         }
5043
5044         /* TODO: add support for compounds containing READ. */
5045         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5046                 return receive_encrypted_read(server, &mids[0], num_mids);
5047         }
5048
5049         return receive_encrypted_standard(server, mids, bufs, num_mids);
5050 }
5051
5052 int
5053 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5054 {
5055         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5056
5057         return handle_read_data(server, mid, buf, server->pdu_size,
5058                                 NULL, 0, false);
5059 }
5060
5061 static int
5062 smb2_next_header(char *buf)
5063 {
5064         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5065         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5066
5067         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5068                 return sizeof(struct smb2_transform_hdr) +
5069                   le32_to_cpu(t_hdr->OriginalMessageSize);
5070
5071         return le32_to_cpu(hdr->NextCommand);
5072 }
5073
5074 static int
5075 smb2_make_node(unsigned int xid, struct inode *inode,
5076                struct dentry *dentry, struct cifs_tcon *tcon,
5077                const char *full_path, umode_t mode, dev_t dev)
5078 {
5079         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5080         int rc = -EPERM;
5081         struct cifs_open_info_data buf = {};
5082         struct cifs_io_parms io_parms = {0};
5083         __u32 oplock = 0;
5084         struct cifs_fid fid;
5085         struct cifs_open_parms oparms;
5086         unsigned int bytes_written;
5087         struct win_dev *pdev;
5088         struct kvec iov[2];
5089
5090         /*
5091          * Check if mounted with mount parm 'sfu' mount parm.
5092          * SFU emulation should work with all servers, but only
5093          * supports block and char device (no socket & fifo),
5094          * and was used by default in earlier versions of Windows
5095          */
5096         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5097                 return rc;
5098
5099         /*
5100          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5101          * their current NFS server) uses this approach to expose special files
5102          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5103          */
5104
5105         if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode))
5106                 return rc;
5107
5108         cifs_dbg(FYI, "sfu compat create special file\n");
5109
5110         oparms = (struct cifs_open_parms) {
5111                 .tcon = tcon,
5112                 .cifs_sb = cifs_sb,
5113                 .desired_access = GENERIC_WRITE,
5114                 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5115                                                       CREATE_OPTION_SPECIAL),
5116                 .disposition = FILE_CREATE,
5117                 .path = full_path,
5118                 .fid = &fid,
5119         };
5120
5121         if (tcon->ses->server->oplocks)
5122                 oplock = REQ_OPLOCK;
5123         else
5124                 oplock = 0;
5125         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf);
5126         if (rc)
5127                 return rc;
5128
5129         /*
5130          * BB Do not bother to decode buf since no local inode yet to put
5131          * timestamps in, but we can reuse it safely.
5132          */
5133
5134         pdev = (struct win_dev *)&buf.fi;
5135         io_parms.pid = current->tgid;
5136         io_parms.tcon = tcon;
5137         io_parms.offset = 0;
5138         io_parms.length = sizeof(struct win_dev);
5139         iov[1].iov_base = &buf.fi;
5140         iov[1].iov_len = sizeof(struct win_dev);
5141         if (S_ISCHR(mode)) {
5142                 memcpy(pdev->type, "IntxCHR", 8);
5143                 pdev->major = cpu_to_le64(MAJOR(dev));
5144                 pdev->minor = cpu_to_le64(MINOR(dev));
5145                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5146                                                         &bytes_written, iov, 1);
5147         } else if (S_ISBLK(mode)) {
5148                 memcpy(pdev->type, "IntxBLK", 8);
5149                 pdev->major = cpu_to_le64(MAJOR(dev));
5150                 pdev->minor = cpu_to_le64(MINOR(dev));
5151                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5152                                                         &bytes_written, iov, 1);
5153         } else if (S_ISFIFO(mode)) {
5154                 memcpy(pdev->type, "LnxFIFO", 8);
5155                 pdev->major = 0;
5156                 pdev->minor = 0;
5157                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5158                                                         &bytes_written, iov, 1);
5159         }
5160         tcon->ses->server->ops->close(xid, tcon, &fid);
5161         d_drop(dentry);
5162
5163         /* FIXME: add code here to set EAs */
5164
5165         cifs_free_open_info(&buf);
5166         return rc;
5167 }
5168
5169 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5170 struct smb_version_operations smb20_operations = {
5171         .compare_fids = smb2_compare_fids,
5172         .setup_request = smb2_setup_request,
5173         .setup_async_request = smb2_setup_async_request,
5174         .check_receive = smb2_check_receive,
5175         .add_credits = smb2_add_credits,
5176         .set_credits = smb2_set_credits,
5177         .get_credits_field = smb2_get_credits_field,
5178         .get_credits = smb2_get_credits,
5179         .wait_mtu_credits = cifs_wait_mtu_credits,
5180         .get_next_mid = smb2_get_next_mid,
5181         .revert_current_mid = smb2_revert_current_mid,
5182         .read_data_offset = smb2_read_data_offset,
5183         .read_data_length = smb2_read_data_length,
5184         .map_error = map_smb2_to_linux_error,
5185         .find_mid = smb2_find_mid,
5186         .check_message = smb2_check_message,
5187         .dump_detail = smb2_dump_detail,
5188         .clear_stats = smb2_clear_stats,
5189         .print_stats = smb2_print_stats,
5190         .is_oplock_break = smb2_is_valid_oplock_break,
5191         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5192         .downgrade_oplock = smb2_downgrade_oplock,
5193         .need_neg = smb2_need_neg,
5194         .negotiate = smb2_negotiate,
5195         .negotiate_wsize = smb2_negotiate_wsize,
5196         .negotiate_rsize = smb2_negotiate_rsize,
5197         .sess_setup = SMB2_sess_setup,
5198         .logoff = SMB2_logoff,
5199         .tree_connect = SMB2_tcon,
5200         .tree_disconnect = SMB2_tdis,
5201         .qfs_tcon = smb2_qfs_tcon,
5202         .is_path_accessible = smb2_is_path_accessible,
5203         .can_echo = smb2_can_echo,
5204         .echo = SMB2_echo,
5205         .query_path_info = smb2_query_path_info,
5206         .query_reparse_point = smb2_query_reparse_point,
5207         .get_srv_inum = smb2_get_srv_inum,
5208         .query_file_info = smb2_query_file_info,
5209         .set_path_size = smb2_set_path_size,
5210         .set_file_size = smb2_set_file_size,
5211         .set_file_info = smb2_set_file_info,
5212         .set_compression = smb2_set_compression,
5213         .mkdir = smb2_mkdir,
5214         .mkdir_setinfo = smb2_mkdir_setinfo,
5215         .rmdir = smb2_rmdir,
5216         .unlink = smb2_unlink,
5217         .rename = smb2_rename_path,
5218         .create_hardlink = smb2_create_hardlink,
5219         .query_symlink = smb2_query_symlink,
5220         .query_mf_symlink = smb3_query_mf_symlink,
5221         .create_mf_symlink = smb3_create_mf_symlink,
5222         .open = smb2_open_file,
5223         .set_fid = smb2_set_fid,
5224         .close = smb2_close_file,
5225         .flush = smb2_flush_file,
5226         .async_readv = smb2_async_readv,
5227         .async_writev = smb2_async_writev,
5228         .sync_read = smb2_sync_read,
5229         .sync_write = smb2_sync_write,
5230         .query_dir_first = smb2_query_dir_first,
5231         .query_dir_next = smb2_query_dir_next,
5232         .close_dir = smb2_close_dir,
5233         .calc_smb_size = smb2_calc_size,
5234         .is_status_pending = smb2_is_status_pending,
5235         .is_session_expired = smb2_is_session_expired,
5236         .oplock_response = smb2_oplock_response,
5237         .queryfs = smb2_queryfs,
5238         .mand_lock = smb2_mand_lock,
5239         .mand_unlock_range = smb2_unlock_range,
5240         .push_mand_locks = smb2_push_mandatory_locks,
5241         .get_lease_key = smb2_get_lease_key,
5242         .set_lease_key = smb2_set_lease_key,
5243         .new_lease_key = smb2_new_lease_key,
5244         .calc_signature = smb2_calc_signature,
5245         .is_read_op = smb2_is_read_op,
5246         .set_oplock_level = smb2_set_oplock_level,
5247         .create_lease_buf = smb2_create_lease_buf,
5248         .parse_lease_buf = smb2_parse_lease_buf,
5249         .copychunk_range = smb2_copychunk_range,
5250         .wp_retry_size = smb2_wp_retry_size,
5251         .dir_needs_close = smb2_dir_needs_close,
5252         .get_dfs_refer = smb2_get_dfs_refer,
5253         .select_sectype = smb2_select_sectype,
5254 #ifdef CONFIG_CIFS_XATTR
5255         .query_all_EAs = smb2_query_eas,
5256         .set_EA = smb2_set_ea,
5257 #endif /* CIFS_XATTR */
5258         .get_acl = get_smb2_acl,
5259         .get_acl_by_fid = get_smb2_acl_by_fid,
5260         .set_acl = set_smb2_acl,
5261         .next_header = smb2_next_header,
5262         .ioctl_query_info = smb2_ioctl_query_info,
5263         .make_node = smb2_make_node,
5264         .fiemap = smb3_fiemap,
5265         .llseek = smb3_llseek,
5266         .is_status_io_timeout = smb2_is_status_io_timeout,
5267         .is_network_name_deleted = smb2_is_network_name_deleted,
5268 };
5269 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5270
5271 struct smb_version_operations smb21_operations = {
5272         .compare_fids = smb2_compare_fids,
5273         .setup_request = smb2_setup_request,
5274         .setup_async_request = smb2_setup_async_request,
5275         .check_receive = smb2_check_receive,
5276         .add_credits = smb2_add_credits,
5277         .set_credits = smb2_set_credits,
5278         .get_credits_field = smb2_get_credits_field,
5279         .get_credits = smb2_get_credits,
5280         .wait_mtu_credits = smb2_wait_mtu_credits,
5281         .adjust_credits = smb2_adjust_credits,
5282         .get_next_mid = smb2_get_next_mid,
5283         .revert_current_mid = smb2_revert_current_mid,
5284         .read_data_offset = smb2_read_data_offset,
5285         .read_data_length = smb2_read_data_length,
5286         .map_error = map_smb2_to_linux_error,
5287         .find_mid = smb2_find_mid,
5288         .check_message = smb2_check_message,
5289         .dump_detail = smb2_dump_detail,
5290         .clear_stats = smb2_clear_stats,
5291         .print_stats = smb2_print_stats,
5292         .is_oplock_break = smb2_is_valid_oplock_break,
5293         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5294         .downgrade_oplock = smb2_downgrade_oplock,
5295         .need_neg = smb2_need_neg,
5296         .negotiate = smb2_negotiate,
5297         .negotiate_wsize = smb2_negotiate_wsize,
5298         .negotiate_rsize = smb2_negotiate_rsize,
5299         .sess_setup = SMB2_sess_setup,
5300         .logoff = SMB2_logoff,
5301         .tree_connect = SMB2_tcon,
5302         .tree_disconnect = SMB2_tdis,
5303         .qfs_tcon = smb2_qfs_tcon,
5304         .is_path_accessible = smb2_is_path_accessible,
5305         .can_echo = smb2_can_echo,
5306         .echo = SMB2_echo,
5307         .query_path_info = smb2_query_path_info,
5308         .query_reparse_point = smb2_query_reparse_point,
5309         .get_srv_inum = smb2_get_srv_inum,
5310         .query_file_info = smb2_query_file_info,
5311         .set_path_size = smb2_set_path_size,
5312         .set_file_size = smb2_set_file_size,
5313         .set_file_info = smb2_set_file_info,
5314         .set_compression = smb2_set_compression,
5315         .mkdir = smb2_mkdir,
5316         .mkdir_setinfo = smb2_mkdir_setinfo,
5317         .rmdir = smb2_rmdir,
5318         .unlink = smb2_unlink,
5319         .rename = smb2_rename_path,
5320         .create_hardlink = smb2_create_hardlink,
5321         .query_symlink = smb2_query_symlink,
5322         .query_mf_symlink = smb3_query_mf_symlink,
5323         .create_mf_symlink = smb3_create_mf_symlink,
5324         .open = smb2_open_file,
5325         .set_fid = smb2_set_fid,
5326         .close = smb2_close_file,
5327         .flush = smb2_flush_file,
5328         .async_readv = smb2_async_readv,
5329         .async_writev = smb2_async_writev,
5330         .sync_read = smb2_sync_read,
5331         .sync_write = smb2_sync_write,
5332         .query_dir_first = smb2_query_dir_first,
5333         .query_dir_next = smb2_query_dir_next,
5334         .close_dir = smb2_close_dir,
5335         .calc_smb_size = smb2_calc_size,
5336         .is_status_pending = smb2_is_status_pending,
5337         .is_session_expired = smb2_is_session_expired,
5338         .oplock_response = smb2_oplock_response,
5339         .queryfs = smb2_queryfs,
5340         .mand_lock = smb2_mand_lock,
5341         .mand_unlock_range = smb2_unlock_range,
5342         .push_mand_locks = smb2_push_mandatory_locks,
5343         .get_lease_key = smb2_get_lease_key,
5344         .set_lease_key = smb2_set_lease_key,
5345         .new_lease_key = smb2_new_lease_key,
5346         .calc_signature = smb2_calc_signature,
5347         .is_read_op = smb21_is_read_op,
5348         .set_oplock_level = smb21_set_oplock_level,
5349         .create_lease_buf = smb2_create_lease_buf,
5350         .parse_lease_buf = smb2_parse_lease_buf,
5351         .copychunk_range = smb2_copychunk_range,
5352         .wp_retry_size = smb2_wp_retry_size,
5353         .dir_needs_close = smb2_dir_needs_close,
5354         .enum_snapshots = smb3_enum_snapshots,
5355         .notify = smb3_notify,
5356         .get_dfs_refer = smb2_get_dfs_refer,
5357         .select_sectype = smb2_select_sectype,
5358 #ifdef CONFIG_CIFS_XATTR
5359         .query_all_EAs = smb2_query_eas,
5360         .set_EA = smb2_set_ea,
5361 #endif /* CIFS_XATTR */
5362         .get_acl = get_smb2_acl,
5363         .get_acl_by_fid = get_smb2_acl_by_fid,
5364         .set_acl = set_smb2_acl,
5365         .next_header = smb2_next_header,
5366         .ioctl_query_info = smb2_ioctl_query_info,
5367         .make_node = smb2_make_node,
5368         .fiemap = smb3_fiemap,
5369         .llseek = smb3_llseek,
5370         .is_status_io_timeout = smb2_is_status_io_timeout,
5371         .is_network_name_deleted = smb2_is_network_name_deleted,
5372 };
5373
5374 struct smb_version_operations smb30_operations = {
5375         .compare_fids = smb2_compare_fids,
5376         .setup_request = smb2_setup_request,
5377         .setup_async_request = smb2_setup_async_request,
5378         .check_receive = smb2_check_receive,
5379         .add_credits = smb2_add_credits,
5380         .set_credits = smb2_set_credits,
5381         .get_credits_field = smb2_get_credits_field,
5382         .get_credits = smb2_get_credits,
5383         .wait_mtu_credits = smb2_wait_mtu_credits,
5384         .adjust_credits = smb2_adjust_credits,
5385         .get_next_mid = smb2_get_next_mid,
5386         .revert_current_mid = smb2_revert_current_mid,
5387         .read_data_offset = smb2_read_data_offset,
5388         .read_data_length = smb2_read_data_length,
5389         .map_error = map_smb2_to_linux_error,
5390         .find_mid = smb2_find_mid,
5391         .check_message = smb2_check_message,
5392         .dump_detail = smb2_dump_detail,
5393         .clear_stats = smb2_clear_stats,
5394         .print_stats = smb2_print_stats,
5395         .dump_share_caps = smb2_dump_share_caps,
5396         .is_oplock_break = smb2_is_valid_oplock_break,
5397         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5398         .downgrade_oplock = smb3_downgrade_oplock,
5399         .need_neg = smb2_need_neg,
5400         .negotiate = smb2_negotiate,
5401         .negotiate_wsize = smb3_negotiate_wsize,
5402         .negotiate_rsize = smb3_negotiate_rsize,
5403         .sess_setup = SMB2_sess_setup,
5404         .logoff = SMB2_logoff,
5405         .tree_connect = SMB2_tcon,
5406         .tree_disconnect = SMB2_tdis,
5407         .qfs_tcon = smb3_qfs_tcon,
5408         .is_path_accessible = smb2_is_path_accessible,
5409         .can_echo = smb2_can_echo,
5410         .echo = SMB2_echo,
5411         .query_path_info = smb2_query_path_info,
5412         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5413         .query_reparse_point = smb2_query_reparse_point,
5414         .get_srv_inum = smb2_get_srv_inum,
5415         .query_file_info = smb2_query_file_info,
5416         .set_path_size = smb2_set_path_size,
5417         .set_file_size = smb2_set_file_size,
5418         .set_file_info = smb2_set_file_info,
5419         .set_compression = smb2_set_compression,
5420         .mkdir = smb2_mkdir,
5421         .mkdir_setinfo = smb2_mkdir_setinfo,
5422         .rmdir = smb2_rmdir,
5423         .unlink = smb2_unlink,
5424         .rename = smb2_rename_path,
5425         .create_hardlink = smb2_create_hardlink,
5426         .query_symlink = smb2_query_symlink,
5427         .query_mf_symlink = smb3_query_mf_symlink,
5428         .create_mf_symlink = smb3_create_mf_symlink,
5429         .open = smb2_open_file,
5430         .set_fid = smb2_set_fid,
5431         .close = smb2_close_file,
5432         .close_getattr = smb2_close_getattr,
5433         .flush = smb2_flush_file,
5434         .async_readv = smb2_async_readv,
5435         .async_writev = smb2_async_writev,
5436         .sync_read = smb2_sync_read,
5437         .sync_write = smb2_sync_write,
5438         .query_dir_first = smb2_query_dir_first,
5439         .query_dir_next = smb2_query_dir_next,
5440         .close_dir = smb2_close_dir,
5441         .calc_smb_size = smb2_calc_size,
5442         .is_status_pending = smb2_is_status_pending,
5443         .is_session_expired = smb2_is_session_expired,
5444         .oplock_response = smb2_oplock_response,
5445         .queryfs = smb2_queryfs,
5446         .mand_lock = smb2_mand_lock,
5447         .mand_unlock_range = smb2_unlock_range,
5448         .push_mand_locks = smb2_push_mandatory_locks,
5449         .get_lease_key = smb2_get_lease_key,
5450         .set_lease_key = smb2_set_lease_key,
5451         .new_lease_key = smb2_new_lease_key,
5452         .generate_signingkey = generate_smb30signingkey,
5453         .calc_signature = smb3_calc_signature,
5454         .set_integrity  = smb3_set_integrity,
5455         .is_read_op = smb21_is_read_op,
5456         .set_oplock_level = smb3_set_oplock_level,
5457         .create_lease_buf = smb3_create_lease_buf,
5458         .parse_lease_buf = smb3_parse_lease_buf,
5459         .copychunk_range = smb2_copychunk_range,
5460         .duplicate_extents = smb2_duplicate_extents,
5461         .validate_negotiate = smb3_validate_negotiate,
5462         .wp_retry_size = smb2_wp_retry_size,
5463         .dir_needs_close = smb2_dir_needs_close,
5464         .fallocate = smb3_fallocate,
5465         .enum_snapshots = smb3_enum_snapshots,
5466         .notify = smb3_notify,
5467         .init_transform_rq = smb3_init_transform_rq,
5468         .is_transform_hdr = smb3_is_transform_hdr,
5469         .receive_transform = smb3_receive_transform,
5470         .get_dfs_refer = smb2_get_dfs_refer,
5471         .select_sectype = smb2_select_sectype,
5472 #ifdef CONFIG_CIFS_XATTR
5473         .query_all_EAs = smb2_query_eas,
5474         .set_EA = smb2_set_ea,
5475 #endif /* CIFS_XATTR */
5476         .get_acl = get_smb2_acl,
5477         .get_acl_by_fid = get_smb2_acl_by_fid,
5478         .set_acl = set_smb2_acl,
5479         .next_header = smb2_next_header,
5480         .ioctl_query_info = smb2_ioctl_query_info,
5481         .make_node = smb2_make_node,
5482         .fiemap = smb3_fiemap,
5483         .llseek = smb3_llseek,
5484         .is_status_io_timeout = smb2_is_status_io_timeout,
5485         .is_network_name_deleted = smb2_is_network_name_deleted,
5486 };
5487
5488 struct smb_version_operations smb311_operations = {
5489         .compare_fids = smb2_compare_fids,
5490         .setup_request = smb2_setup_request,
5491         .setup_async_request = smb2_setup_async_request,
5492         .check_receive = smb2_check_receive,
5493         .add_credits = smb2_add_credits,
5494         .set_credits = smb2_set_credits,
5495         .get_credits_field = smb2_get_credits_field,
5496         .get_credits = smb2_get_credits,
5497         .wait_mtu_credits = smb2_wait_mtu_credits,
5498         .adjust_credits = smb2_adjust_credits,
5499         .get_next_mid = smb2_get_next_mid,
5500         .revert_current_mid = smb2_revert_current_mid,
5501         .read_data_offset = smb2_read_data_offset,
5502         .read_data_length = smb2_read_data_length,
5503         .map_error = map_smb2_to_linux_error,
5504         .find_mid = smb2_find_mid,
5505         .check_message = smb2_check_message,
5506         .dump_detail = smb2_dump_detail,
5507         .clear_stats = smb2_clear_stats,
5508         .print_stats = smb2_print_stats,
5509         .dump_share_caps = smb2_dump_share_caps,
5510         .is_oplock_break = smb2_is_valid_oplock_break,
5511         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5512         .downgrade_oplock = smb3_downgrade_oplock,
5513         .need_neg = smb2_need_neg,
5514         .negotiate = smb2_negotiate,
5515         .negotiate_wsize = smb3_negotiate_wsize,
5516         .negotiate_rsize = smb3_negotiate_rsize,
5517         .sess_setup = SMB2_sess_setup,
5518         .logoff = SMB2_logoff,
5519         .tree_connect = SMB2_tcon,
5520         .tree_disconnect = SMB2_tdis,
5521         .qfs_tcon = smb3_qfs_tcon,
5522         .is_path_accessible = smb2_is_path_accessible,
5523         .can_echo = smb2_can_echo,
5524         .echo = SMB2_echo,
5525         .query_path_info = smb2_query_path_info,
5526         .query_reparse_point = smb2_query_reparse_point,
5527         .get_srv_inum = smb2_get_srv_inum,
5528         .query_file_info = smb2_query_file_info,
5529         .set_path_size = smb2_set_path_size,
5530         .set_file_size = smb2_set_file_size,
5531         .set_file_info = smb2_set_file_info,
5532         .set_compression = smb2_set_compression,
5533         .mkdir = smb2_mkdir,
5534         .mkdir_setinfo = smb2_mkdir_setinfo,
5535         .posix_mkdir = smb311_posix_mkdir,
5536         .rmdir = smb2_rmdir,
5537         .unlink = smb2_unlink,
5538         .rename = smb2_rename_path,
5539         .create_hardlink = smb2_create_hardlink,
5540         .query_symlink = smb2_query_symlink,
5541         .query_mf_symlink = smb3_query_mf_symlink,
5542         .create_mf_symlink = smb3_create_mf_symlink,
5543         .open = smb2_open_file,
5544         .set_fid = smb2_set_fid,
5545         .close = smb2_close_file,
5546         .close_getattr = smb2_close_getattr,
5547         .flush = smb2_flush_file,
5548         .async_readv = smb2_async_readv,
5549         .async_writev = smb2_async_writev,
5550         .sync_read = smb2_sync_read,
5551         .sync_write = smb2_sync_write,
5552         .query_dir_first = smb2_query_dir_first,
5553         .query_dir_next = smb2_query_dir_next,
5554         .close_dir = smb2_close_dir,
5555         .calc_smb_size = smb2_calc_size,
5556         .is_status_pending = smb2_is_status_pending,
5557         .is_session_expired = smb2_is_session_expired,
5558         .oplock_response = smb2_oplock_response,
5559         .queryfs = smb311_queryfs,
5560         .mand_lock = smb2_mand_lock,
5561         .mand_unlock_range = smb2_unlock_range,
5562         .push_mand_locks = smb2_push_mandatory_locks,
5563         .get_lease_key = smb2_get_lease_key,
5564         .set_lease_key = smb2_set_lease_key,
5565         .new_lease_key = smb2_new_lease_key,
5566         .generate_signingkey = generate_smb311signingkey,
5567         .calc_signature = smb3_calc_signature,
5568         .set_integrity  = smb3_set_integrity,
5569         .is_read_op = smb21_is_read_op,
5570         .set_oplock_level = smb3_set_oplock_level,
5571         .create_lease_buf = smb3_create_lease_buf,
5572         .parse_lease_buf = smb3_parse_lease_buf,
5573         .copychunk_range = smb2_copychunk_range,
5574         .duplicate_extents = smb2_duplicate_extents,
5575 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5576         .wp_retry_size = smb2_wp_retry_size,
5577         .dir_needs_close = smb2_dir_needs_close,
5578         .fallocate = smb3_fallocate,
5579         .enum_snapshots = smb3_enum_snapshots,
5580         .notify = smb3_notify,
5581         .init_transform_rq = smb3_init_transform_rq,
5582         .is_transform_hdr = smb3_is_transform_hdr,
5583         .receive_transform = smb3_receive_transform,
5584         .get_dfs_refer = smb2_get_dfs_refer,
5585         .select_sectype = smb2_select_sectype,
5586 #ifdef CONFIG_CIFS_XATTR
5587         .query_all_EAs = smb2_query_eas,
5588         .set_EA = smb2_set_ea,
5589 #endif /* CIFS_XATTR */
5590         .get_acl = get_smb2_acl,
5591         .get_acl_by_fid = get_smb2_acl_by_fid,
5592         .set_acl = set_smb2_acl,
5593         .next_header = smb2_next_header,
5594         .ioctl_query_info = smb2_ioctl_query_info,
5595         .make_node = smb2_make_node,
5596         .fiemap = smb3_fiemap,
5597         .llseek = smb3_llseek,
5598         .is_status_io_timeout = smb2_is_status_io_timeout,
5599         .is_network_name_deleted = smb2_is_network_name_deleted,
5600 };
5601
5602 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5603 struct smb_version_values smb20_values = {
5604         .version_string = SMB20_VERSION_STRING,
5605         .protocol_id = SMB20_PROT_ID,
5606         .req_capabilities = 0, /* MBZ */
5607         .large_lock_type = 0,
5608         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5609         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5610         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5611         .header_size = sizeof(struct smb2_hdr),
5612         .header_preamble_size = 0,
5613         .max_header_size = MAX_SMB2_HDR_SIZE,
5614         .read_rsp_size = sizeof(struct smb2_read_rsp),
5615         .lock_cmd = SMB2_LOCK,
5616         .cap_unix = 0,
5617         .cap_nt_find = SMB2_NT_FIND,
5618         .cap_large_files = SMB2_LARGE_FILES,
5619         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5620         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5621         .create_lease_size = sizeof(struct create_lease),
5622 };
5623 #endif /* ALLOW_INSECURE_LEGACY */
5624
5625 struct smb_version_values smb21_values = {
5626         .version_string = SMB21_VERSION_STRING,
5627         .protocol_id = SMB21_PROT_ID,
5628         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
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),
5644 };
5645
5646 struct smb_version_values smb3any_values = {
5647         .version_string = SMB3ANY_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 smbdefault_values = {
5668         .version_string = SMBDEFAULT_VERSION_STRING,
5669         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
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 smb30_values = {
5689         .version_string = SMB30_VERSION_STRING,
5690         .protocol_id = SMB30_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 smb302_values = {
5710         .version_string = SMB302_VERSION_STRING,
5711         .protocol_id = SMB302_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 };
5729
5730 struct smb_version_values smb311_values = {
5731         .version_string = SMB311_VERSION_STRING,
5732         .protocol_id = SMB311_PROT_ID,
5733         .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,
5734         .large_lock_type = 0,
5735         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5736         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5737         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5738         .header_size = sizeof(struct smb2_hdr),
5739         .header_preamble_size = 0,
5740         .max_header_size = MAX_SMB2_HDR_SIZE,
5741         .read_rsp_size = sizeof(struct smb2_read_rsp),
5742         .lock_cmd = SMB2_LOCK,
5743         .cap_unix = 0,
5744         .cap_nt_find = SMB2_NT_FIND,
5745         .cap_large_files = SMB2_LARGE_FILES,
5746         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5747         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5748         .create_lease_size = sizeof(struct create_lease_v2),
5749 };