fs/cifs/smb2ops.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  SMB2 version specific operations
   4  *
   5  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   6  */
   7
   8 #include <linux/pagemap.h>
   9 #include <linux/vfs.h>
  10 #include <linux/falloc.h>
  11 #include <linux/scatterlist.h>
  12 #include <linux/uuid.h>
  13 #include <linux/sort.h>
  14 #include <crypto/aead.h>
  15 #include "cifsglob.h"
  16 #include "smb2pdu.h"
  17 #include "smb2proto.h"
  18 #include "cifsproto.h"
  19 #include "cifs_debug.h"
  20 #include "cifs_unicode.h"
  21 #include "smb2status.h"
  22 #include "smb2glob.h"
  23 #include "cifs_ioctl.h"
  24 #include "smbdirect.h"
  25
  26 /* Change credits for different ops and return the total number of credits */
  27 static int
  28 change_conf(struct TCP_Server_Info *server)
  29 {
  30         server->credits += server->echo_credits + server->oplock_credits;
  31         server->oplock_credits = server->echo_credits = 0;
  32         switch (server->credits) {
  33         case 0:
  34                 return 0;
  35         case 1:
  36                 server->echoes = false;
  37                 server->oplocks = false;
  38                 break;
  39         case 2:
  40                 server->echoes = true;
  41                 server->oplocks = false;
  42                 server->echo_credits = 1;
  43                 break;
  44         default:
  45                 server->echoes = true;
  46                 if (enable_oplocks) {
  47                         server->oplocks = true;
  48                         server->oplock_credits = 1;
  49                 } else
  50                         server->oplocks = false;
  51
  52                 server->echo_credits = 1;
  53         }
  54         server->credits -= server->echo_credits + server->oplock_credits;
  55         return server->credits + server->echo_credits + server->oplock_credits;
  56 }
  57
  58 static void
  59 smb2_add_credits(struct TCP_Server_Info *server,
  60                  const struct cifs_credits *credits, const int optype)
  61 {
  62         int *val, rc = -1;
  63         unsigned int add = credits->value;
  64         unsigned int instance = credits->instance;
  65         bool reconnect_detected = false;
  66
  67         spin_lock(&server->req_lock);
  68         val = server->ops->get_credits_field(server, optype);
  69
  70         /* eg found case where write overlapping reconnect messed up credits */
  71         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  72                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
  73                         server->hostname, *val);
  74         if ((instance == 0) || (instance == server->reconnect_instance))
  75                 *val += add;
  76         else
  77                 reconnect_detected = true;
  78
  79         if (*val > 65000) {
  80                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  81                 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  82         }
  83         server->in_flight--;
  84         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  85                 rc = change_conf(server);
  86         /*
  87          * Sometimes server returns 0 credits on oplock break ack - we need to
  88          * rebalance credits in this case.
  89          */
  90         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  91                  server->oplocks) {
  92                 if (server->credits > 1) {
  93                         server->credits--;
  94                         server->oplock_credits++;
  95                 }
  96         }
  97         spin_unlock(&server->req_lock);
  98         wake_up(&server->request_q);
  99
 100         if (reconnect_detected)
 101                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 102                          add, instance);
 103
 104         if (server->tcpStatus == CifsNeedReconnect
 105             || server->tcpStatus == CifsExiting)
 106                 return;
 107
 108         switch (rc) {
 109         case -1:
 110                 /* change_conf hasn't been executed */
 111                 break;
 112         case 0:
 113                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 114                 break;
 115         case 1:
 116                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 117                 break;
 118         case 2:
 119                 cifs_dbg(FYI, "disabling oplocks\n");
 120                 break;
 121         default:
 122                 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
 123         }
 124 }
 125
 126 static void
 127 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 128 {
 129         spin_lock(&server->req_lock);
 130         server->credits = val;
 131         if (val == 1)
 132                 server->reconnect_instance++;
 133         spin_unlock(&server->req_lock);
 134         /* don't log while holding the lock */
 135         if (val == 1)
 136                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 137 }
 138
 139 static int *
 140 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 141 {
 142         switch (optype) {
 143         case CIFS_ECHO_OP:
 144                 return &server->echo_credits;
 145         case CIFS_OBREAK_OP:
 146                 return &server->oplock_credits;
 147         default:
 148                 return &server->credits;
 149         }
 150 }
 151
 152 static unsigned int
 153 smb2_get_credits(struct mid_q_entry *mid)
 154 {
 155         return mid->credits_received;
 156 }
 157
 158 static int
 159 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 160                       unsigned int *num, struct cifs_credits *credits)
 161 {
 162         int rc = 0;
 163         unsigned int scredits;
 164
 165         spin_lock(&server->req_lock);
 166         while (1) {
 167                 if (server->credits <= 0) {
 168                         spin_unlock(&server->req_lock);
 169                         cifs_num_waiters_inc(server);
 170                         rc = wait_event_killable(server->request_q,
 171                                 has_credits(server, &server->credits, 1));
 172                         cifs_num_waiters_dec(server);
 173                         if (rc)
 174                                 return rc;
 175                         spin_lock(&server->req_lock);
 176                 } else {
 177                         if (server->tcpStatus == CifsExiting) {
 178                                 spin_unlock(&server->req_lock);
 179                                 return -ENOENT;
 180                         }
 181
 182                         scredits = server->credits;
 183                         /* can deadlock with reopen */
 184                         if (scredits <= 8) {
 185                                 *num = SMB2_MAX_BUFFER_SIZE;
 186                                 credits->value = 0;
 187                                 credits->instance = 0;
 188                                 break;
 189                         }
 190
 191                         /* leave some credits for reopen and other ops */
 192                         scredits -= 8;
 193                         *num = min_t(unsigned int, size,
 194                                      scredits * SMB2_MAX_BUFFER_SIZE);
 195
 196                         credits->value =
 197                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 198                         credits->instance = server->reconnect_instance;
 199                         server->credits -= credits->value;
 200                         server->in_flight++;
 201                         if (server->in_flight > server->max_in_flight)
 202                                 server->max_in_flight = server->in_flight;
 203                         break;
 204                 }
 205         }
 206         spin_unlock(&server->req_lock);
 207         return rc;
 208 }
 209
 210 static int
 211 smb2_adjust_credits(struct TCP_Server_Info *server,
 212                     struct cifs_credits *credits,
 213                     const unsigned int payload_size)
 214 {
 215         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 216
 217         if (!credits->value || credits->value == new_val)
 218                 return 0;
 219
 220         if (credits->value < new_val) {
 221                 WARN_ONCE(1, "request has less credits (%d) than required (%d)",
 222                           credits->value, new_val);
 223                 return -ENOTSUPP;
 224         }
 225
 226         spin_lock(&server->req_lock);
 227
 228         if (server->reconnect_instance != credits->instance) {
 229                 spin_unlock(&server->req_lock);
 230                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 231                          credits->value - new_val);
 232                 return -EAGAIN;
 233         }
 234
 235         server->credits += credits->value - new_val;
 236         spin_unlock(&server->req_lock);
 237         wake_up(&server->request_q);
 238         credits->value = new_val;
 239         return 0;
 240 }
 241
 242 static __u64
 243 smb2_get_next_mid(struct TCP_Server_Info *server)
 244 {
 245         __u64 mid;
 246         /* for SMB2 we need the current value */
 247         spin_lock(&GlobalMid_Lock);
 248         mid = server->CurrentMid++;
 249         spin_unlock(&GlobalMid_Lock);
 250         return mid;
 251 }
 252
 253 static void
 254 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 255 {
 256         spin_lock(&GlobalMid_Lock);
 257         if (server->CurrentMid >= val)
 258                 server->CurrentMid -= val;
 259         spin_unlock(&GlobalMid_Lock);
 260 }
 261
 262 static struct mid_q_entry *
 263 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 264 {
 265         struct mid_q_entry *mid;
 266         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 267         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 268
 269         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 270                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 271                 return NULL;
 272         }
 273
 274         spin_lock(&GlobalMid_Lock);
 275         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 276                 if ((mid->mid == wire_mid) &&
 277                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 278                     (mid->command == shdr->Command)) {
 279                         kref_get(&mid->refcount);
 280                         spin_unlock(&GlobalMid_Lock);
 281                         return mid;
 282                 }
 283         }
 284         spin_unlock(&GlobalMid_Lock);
 285         return NULL;
 286 }
 287
 288 static void
 289 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 290 {
 291 #ifdef CONFIG_CIFS_DEBUG2
 292         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 293
 294         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 295                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 296                  shdr->ProcessId);
 297         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 298                  server->ops->calc_smb_size(buf, server));
 299 #endif
 300 }
 301
 302 static bool
 303 smb2_need_neg(struct TCP_Server_Info *server)
 304 {
 305         return server->max_read == 0;
 306 }
 307
 308 static int
 309 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 310 {
 311         int rc;
 312
 313         cifs_ses_server(ses)->CurrentMid = 0;
 314         rc = SMB2_negotiate(xid, ses);
 315         /* BB we probably don't need to retry with modern servers */
 316         if (rc == -EAGAIN)
 317                 rc = -EHOSTDOWN;
 318         return rc;
 319 }
 320
 321 static unsigned int
 322 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 323 {
 324         struct TCP_Server_Info *server = tcon->ses->server;
 325         unsigned int wsize;
 326
 327         /* start with specified wsize, or default */
 328         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 329         wsize = min_t(unsigned int, wsize, server->max_write);
 330 #ifdef CONFIG_CIFS_SMB_DIRECT
 331         if (server->rdma) {
 332                 if (server->sign)
 333                         wsize = min_t(unsigned int,
 334                                 wsize, server->smbd_conn->max_fragmented_send_size);
 335                 else
 336                         wsize = min_t(unsigned int,
 337                                 wsize, server->smbd_conn->max_readwrite_size);
 338         }
 339 #endif
 340         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 341                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 342
 343         return wsize;
 344 }
 345
 346 static unsigned int
 347 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 348 {
 349         struct TCP_Server_Info *server = tcon->ses->server;
 350         unsigned int wsize;
 351
 352         /* start with specified wsize, or default */
 353         wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
 354         wsize = min_t(unsigned int, wsize, server->max_write);
 355 #ifdef CONFIG_CIFS_SMB_DIRECT
 356         if (server->rdma) {
 357                 if (server->sign)
 358                         wsize = min_t(unsigned int,
 359                                 wsize, server->smbd_conn->max_fragmented_send_size);
 360                 else
 361                         wsize = min_t(unsigned int,
 362                                 wsize, server->smbd_conn->max_readwrite_size);
 363         }
 364 #endif
 365         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 366                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 367
 368         return wsize;
 369 }
 370
 371 static unsigned int
 372 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 373 {
 374         struct TCP_Server_Info *server = tcon->ses->server;
 375         unsigned int rsize;
 376
 377         /* start with specified rsize, or default */
 378         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 379         rsize = min_t(unsigned int, rsize, server->max_read);
 380 #ifdef CONFIG_CIFS_SMB_DIRECT
 381         if (server->rdma) {
 382                 if (server->sign)
 383                         rsize = min_t(unsigned int,
 384                                 rsize, server->smbd_conn->max_fragmented_recv_size);
 385                 else
 386                         rsize = min_t(unsigned int,
 387                                 rsize, server->smbd_conn->max_readwrite_size);
 388         }
 389 #endif
 390
 391         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 392                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 393
 394         return rsize;
 395 }
 396
 397 static unsigned int
 398 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 399 {
 400         struct TCP_Server_Info *server = tcon->ses->server;
 401         unsigned int rsize;
 402
 403         /* start with specified rsize, or default */
 404         rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
 405         rsize = min_t(unsigned int, rsize, server->max_read);
 406 #ifdef CONFIG_CIFS_SMB_DIRECT
 407         if (server->rdma) {
 408                 if (server->sign)
 409                         rsize = min_t(unsigned int,
 410                                 rsize, server->smbd_conn->max_fragmented_recv_size);
 411                 else
 412                         rsize = min_t(unsigned int,
 413                                 rsize, server->smbd_conn->max_readwrite_size);
 414         }
 415 #endif
 416
 417         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 418                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 419
 420         return rsize;
 421 }
 422
 423 static int
 424 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 425                         size_t buf_len,
 426                         struct cifs_server_iface **iface_list,
 427                         size_t *iface_count)
 428 {
 429         struct network_interface_info_ioctl_rsp *p;
 430         struct sockaddr_in *addr4;
 431         struct sockaddr_in6 *addr6;
 432         struct iface_info_ipv4 *p4;
 433         struct iface_info_ipv6 *p6;
 434         struct cifs_server_iface *info;
 435         ssize_t bytes_left;
 436         size_t next = 0;
 437         int nb_iface = 0;
 438         int rc = 0;
 439
 440         *iface_list = NULL;
 441         *iface_count = 0;
 442
 443         /*
 444          * Fist pass: count and sanity check
 445          */
 446
 447         bytes_left = buf_len;
 448         p = buf;
 449         while (bytes_left >= sizeof(*p)) {
 450                 nb_iface++;
 451                 next = le32_to_cpu(p->Next);
 452                 if (!next) {
 453                         bytes_left -= sizeof(*p);
 454                         break;
 455                 }
 456                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 457                 bytes_left -= next;
 458         }
 459
 460         if (!nb_iface) {
 461                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 462                 rc = -EINVAL;
 463                 goto out;
 464         }
 465
 466         if (bytes_left || p->Next)
 467                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 468
 469
 470         /*
 471          * Second pass: extract info to internal structure
 472          */
 473
 474         *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
 475         if (!*iface_list) {
 476                 rc = -ENOMEM;
 477                 goto out;
 478         }
 479
 480         info = *iface_list;
 481         bytes_left = buf_len;
 482         p = buf;
 483         while (bytes_left >= sizeof(*p)) {
 484                 info->speed = le64_to_cpu(p->LinkSpeed);
 485                 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
 486                 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
 487
 488                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 489                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 490                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 491                          le32_to_cpu(p->Capability));
 492
 493                 switch (p->Family) {
 494                 /*
 495                  * The kernel and wire socket structures have the same
 496                  * layout and use network byte order but make the
 497                  * conversion explicit in case either one changes.
 498                  */
 499                 case INTERNETWORK:
 500                         addr4 = (struct sockaddr_in *)&info->sockaddr;
 501                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 502                         addr4->sin_family = AF_INET;
 503                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 504
 505                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 506                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 507
 508                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 509                                  &addr4->sin_addr);
 510                         break;
 511                 case INTERNETWORKV6:
 512                         addr6 = (struct sockaddr_in6 *)&info->sockaddr;
 513                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 514                         addr6->sin6_family = AF_INET6;
 515                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 516
 517                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 518                         addr6->sin6_flowinfo = 0;
 519                         addr6->sin6_scope_id = 0;
 520                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 521
 522                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 523                                  &addr6->sin6_addr);
 524                         break;
 525                 default:
 526                         cifs_dbg(VFS,
 527                                  "%s: skipping unsupported socket family\n",
 528                                  __func__);
 529                         goto next_iface;
 530                 }
 531
 532                 (*iface_count)++;
 533                 info++;
 534 next_iface:
 535                 next = le32_to_cpu(p->Next);
 536                 if (!next)
 537                         break;
 538                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 539                 bytes_left -= next;
 540         }
 541
 542         if (!*iface_count) {
 543                 rc = -EINVAL;
 544                 goto out;
 545         }
 546
 547 out:
 548         if (rc) {
 549                 kfree(*iface_list);
 550                 *iface_count = 0;
 551                 *iface_list = NULL;
 552         }
 553         return rc;
 554 }
 555
 556 static int compare_iface(const void *ia, const void *ib)
 557 {
 558         const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
 559         const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
 560
 561         return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
 562 }
 563
 564 static int
 565 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 566 {
 567         int rc;
 568         unsigned int ret_data_len = 0;
 569         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 570         struct cifs_server_iface *iface_list;
 571         size_t iface_count;
 572         struct cifs_ses *ses = tcon->ses;
 573
 574         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 575                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 576                         NULL /* no data input */, 0 /* no data input */,
 577                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 578         if (rc == -EOPNOTSUPP) {
 579                 cifs_dbg(FYI,
 580                          "server does not support query network interfaces\n");
 581                 goto out;
 582         } else if (rc != 0) {
 583                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 584                 goto out;
 585         }
 586
 587         rc = parse_server_interfaces(out_buf, ret_data_len,
 588                                      &iface_list, &iface_count);
 589         if (rc)
 590                 goto out;
 591
 592         /* sort interfaces from fastest to slowest */
 593         sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
 594
 595         spin_lock(&ses->iface_lock);
 596         kfree(ses->iface_list);
 597         ses->iface_list = iface_list;
 598         ses->iface_count = iface_count;
 599         ses->iface_last_update = jiffies;
 600         spin_unlock(&ses->iface_lock);
 601
 602 out:
 603         kfree(out_buf);
 604         return rc;
 605 }
 606
 607 static void
 608 smb2_close_cached_fid(struct kref *ref)
 609 {
 610         struct cached_fid *cfid = container_of(ref, struct cached_fid,
 611                                                refcount);
 612
 613         if (cfid->is_valid) {
 614                 cifs_dbg(FYI, "clear cached root file handle\n");
 615                 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 616                            cfid->fid->volatile_fid);
 617                 cfid->is_valid = false;
 618                 cfid->file_all_info_is_valid = false;
 619                 cfid->has_lease = false;
 620         }
 621 }
 622
 623 void close_shroot(struct cached_fid *cfid)
 624 {
 625         mutex_lock(&cfid->fid_mutex);
 626         kref_put(&cfid->refcount, smb2_close_cached_fid);
 627         mutex_unlock(&cfid->fid_mutex);
 628 }
 629
 630 void close_shroot_lease_locked(struct cached_fid *cfid)
 631 {
 632         if (cfid->has_lease) {
 633                 cfid->has_lease = false;
 634                 kref_put(&cfid->refcount, smb2_close_cached_fid);
 635         }
 636 }
 637
 638 void close_shroot_lease(struct cached_fid *cfid)
 639 {
 640         mutex_lock(&cfid->fid_mutex);
 641         close_shroot_lease_locked(cfid);
 642         mutex_unlock(&cfid->fid_mutex);
 643 }
 644
 645 void
 646 smb2_cached_lease_break(struct work_struct *work)
 647 {
 648         struct cached_fid *cfid = container_of(work,
 649                                 struct cached_fid, lease_break);
 650
 651         close_shroot_lease(cfid);
 652 }
 653
 654 /*
 655  * Open the directory at the root of a share
 656  */
 657 int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
 658 {
 659         struct cifs_ses *ses = tcon->ses;
 660         struct TCP_Server_Info *server = ses->server;
 661         struct cifs_open_parms oparms;
 662         struct smb2_create_rsp *o_rsp = NULL;
 663         struct smb2_query_info_rsp *qi_rsp = NULL;
 664         int resp_buftype[2];
 665         struct smb_rqst rqst[2];
 666         struct kvec rsp_iov[2];
 667         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
 668         struct kvec qi_iov[1];
 669         int rc, flags = 0;
 670         __le16 utf16_path = 0; /* Null - since an open of top of share */
 671         u8 oplock = SMB2_OPLOCK_LEVEL_II;
 672
 673         mutex_lock(&tcon->crfid.fid_mutex);
 674         if (tcon->crfid.is_valid) {
 675                 cifs_dbg(FYI, "found a cached root file handle\n");
 676                 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
 677                 kref_get(&tcon->crfid.refcount);
 678                 mutex_unlock(&tcon->crfid.fid_mutex);
 679                 return 0;
 680         }
 681
 682         /*
 683          * We do not hold the lock for the open because in case
 684          * SMB2_open needs to reconnect, it will end up calling
 685          * cifs_mark_open_files_invalid() which takes the lock again
 686          * thus causing a deadlock
 687          */
 688
 689         mutex_unlock(&tcon->crfid.fid_mutex);
 690
 691         if (smb3_encryption_required(tcon))
 692                 flags |= CIFS_TRANSFORM_REQ;
 693
 694         memset(rqst, 0, sizeof(rqst));
 695         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
 696         memset(rsp_iov, 0, sizeof(rsp_iov));
 697
 698         /* Open */
 699         memset(&open_iov, 0, sizeof(open_iov));
 700         rqst[0].rq_iov = open_iov;
 701         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
 702
 703         oparms.tcon = tcon;
 704         oparms.create_options = 0;
 705         oparms.desired_access = FILE_READ_ATTRIBUTES;
 706         oparms.disposition = FILE_OPEN;
 707         oparms.fid = pfid;
 708         oparms.reconnect = false;
 709
 710         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &utf16_path);
 711         if (rc)
 712                 goto oshr_free;
 713         smb2_set_next_command(tcon, &rqst[0]);
 714
 715         memset(&qi_iov, 0, sizeof(qi_iov));
 716         rqst[1].rq_iov = qi_iov;
 717         rqst[1].rq_nvec = 1;
 718
 719         rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
 720                                   COMPOUND_FID, FILE_ALL_INFORMATION,
 721                                   SMB2_O_INFO_FILE, 0,
 722                                   sizeof(struct smb2_file_all_info) +
 723                                   PATH_MAX * 2, 0, NULL);
 724         if (rc)
 725                 goto oshr_free;
 726
 727         smb2_set_related(&rqst[1]);
 728
 729         rc = compound_send_recv(xid, ses, flags, 2, rqst,
 730                                 resp_buftype, rsp_iov);
 731         mutex_lock(&tcon->crfid.fid_mutex);
 732
 733         /*
 734          * Now we need to check again as the cached root might have
 735          * been successfully re-opened from a concurrent process
 736          */
 737
 738         if (tcon->crfid.is_valid) {
 739                 /* work was already done */
 740
 741                 /* stash fids for close() later */
 742                 struct cifs_fid fid = {
 743                         .persistent_fid = pfid->persistent_fid,
 744                         .volatile_fid = pfid->volatile_fid,
 745                 };
 746
 747                 /*
 748                  * caller expects this func to set pfid to a valid
 749                  * cached root, so we copy the existing one and get a
 750                  * reference.
 751                  */
 752                 memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
 753                 kref_get(&tcon->crfid.refcount);
 754
 755                 mutex_unlock(&tcon->crfid.fid_mutex);
 756
 757                 if (rc == 0) {
 758                         /* close extra handle outside of crit sec */
 759                         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 760                 }
 761                 goto oshr_free;
 762         }
 763
 764         /* Cached root is still invalid, continue normaly */
 765
 766         if (rc) {
 767                 if (rc == -EREMCHG) {
 768                         tcon->need_reconnect = true;
 769                         printk_once(KERN_WARNING "server share %s deleted\n",
 770                                     tcon->treeName);
 771                 }
 772                 goto oshr_exit;
 773         }
 774
 775         atomic_inc(&tcon->num_remote_opens);
 776
 777         o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
 778         oparms.fid->persistent_fid = o_rsp->PersistentFileId;
 779         oparms.fid->volatile_fid = o_rsp->VolatileFileId;
 780 #ifdef CONFIG_CIFS_DEBUG2
 781         oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
 782 #endif /* CIFS_DEBUG2 */
 783
 784         memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
 785         tcon->crfid.tcon = tcon;
 786         tcon->crfid.is_valid = true;
 787         kref_init(&tcon->crfid.refcount);
 788
 789         /* BB TBD check to see if oplock level check can be removed below */
 790         if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
 791                 kref_get(&tcon->crfid.refcount);
 792                 tcon->crfid.has_lease = true;
 793                 smb2_parse_contexts(server, o_rsp,
 794                                 &oparms.fid->epoch,
 795                                 oparms.fid->lease_key, &oplock, NULL);
 796         } else
 797                 goto oshr_exit;
 798
 799         qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
 800         if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
 801                 goto oshr_exit;
 802         if (!smb2_validate_and_copy_iov(
 803                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 804                                 sizeof(struct smb2_file_all_info),
 805                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 806                                 (char *)&tcon->crfid.file_all_info))
 807                 tcon->crfid.file_all_info_is_valid = true;
 808
 809 oshr_exit:
 810         mutex_unlock(&tcon->crfid.fid_mutex);
 811 oshr_free:
 812         SMB2_open_free(&rqst[0]);
 813         SMB2_query_info_free(&rqst[1]);
 814         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 815         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 816         return rc;
 817 }
 818
 819 static void
 820 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 821 {
 822         int rc;
 823         __le16 srch_path = 0; /* Null - open root of share */
 824         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 825         struct cifs_open_parms oparms;
 826         struct cifs_fid fid;
 827         bool no_cached_open = tcon->nohandlecache;
 828
 829         oparms.tcon = tcon;
 830         oparms.desired_access = FILE_READ_ATTRIBUTES;
 831         oparms.disposition = FILE_OPEN;
 832         oparms.create_options = 0;
 833         oparms.fid = &fid;
 834         oparms.reconnect = false;
 835
 836         if (no_cached_open)
 837                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 838                                NULL);
 839         else
 840                 rc = open_shroot(xid, tcon, &fid);
 841
 842         if (rc)
 843                 return;
 844
 845         SMB3_request_interfaces(xid, tcon);
 846
 847         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 848                         FS_ATTRIBUTE_INFORMATION);
 849         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 850                         FS_DEVICE_INFORMATION);
 851         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 852                         FS_VOLUME_INFORMATION);
 853         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 854                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 855         if (no_cached_open)
 856                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 857         else
 858                 close_shroot(&tcon->crfid);
 859 }
 860
 861 static void
 862 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 863 {
 864         int rc;
 865         __le16 srch_path = 0; /* Null - open root of share */
 866         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 867         struct cifs_open_parms oparms;
 868         struct cifs_fid fid;
 869
 870         oparms.tcon = tcon;
 871         oparms.desired_access = FILE_READ_ATTRIBUTES;
 872         oparms.disposition = FILE_OPEN;
 873         oparms.create_options = 0;
 874         oparms.fid = &fid;
 875         oparms.reconnect = false;
 876
 877         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
 878         if (rc)
 879                 return;
 880
 881         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 882                         FS_ATTRIBUTE_INFORMATION);
 883         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 884                         FS_DEVICE_INFORMATION);
 885         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 886 }
 887
 888 static int
 889 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 890                         struct cifs_sb_info *cifs_sb, const char *full_path)
 891 {
 892         int rc;
 893         __le16 *utf16_path;
 894         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 895         struct cifs_open_parms oparms;
 896         struct cifs_fid fid;
 897
 898         if ((*full_path == 0) && tcon->crfid.is_valid)
 899                 return 0;
 900
 901         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 902         if (!utf16_path)
 903                 return -ENOMEM;
 904
 905         oparms.tcon = tcon;
 906         oparms.desired_access = FILE_READ_ATTRIBUTES;
 907         oparms.disposition = FILE_OPEN;
 908         if (backup_cred(cifs_sb))
 909                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
 910         else
 911                 oparms.create_options = 0;
 912         oparms.fid = &fid;
 913         oparms.reconnect = false;
 914
 915         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 916         if (rc) {
 917                 kfree(utf16_path);
 918                 return rc;
 919         }
 920
 921         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 922         kfree(utf16_path);
 923         return rc;
 924 }
 925
 926 static int
 927 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 928                   struct cifs_sb_info *cifs_sb, const char *full_path,
 929                   u64 *uniqueid, FILE_ALL_INFO *data)
 930 {
 931         *uniqueid = le64_to_cpu(data->IndexNumber);
 932         return 0;
 933 }
 934
 935 static int
 936 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 937                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 938 {
 939         int rc;
 940         struct smb2_file_all_info *smb2_data;
 941
 942         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 943                             GFP_KERNEL);
 944         if (smb2_data == NULL)
 945                 return -ENOMEM;
 946
 947         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 948                              smb2_data);
 949         if (!rc)
 950                 move_smb2_info_to_cifs(data, smb2_data);
 951         kfree(smb2_data);
 952         return rc;
 953 }
 954
 955 #ifdef CONFIG_CIFS_XATTR
 956 static ssize_t
 957 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 958                      struct smb2_file_full_ea_info *src, size_t src_size,
 959                      const unsigned char *ea_name)
 960 {
 961         int rc = 0;
 962         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 963         char *name, *value;
 964         size_t buf_size = dst_size;
 965         size_t name_len, value_len, user_name_len;
 966
 967         while (src_size > 0) {
 968                 name = &src->ea_data[0];
 969                 name_len = (size_t)src->ea_name_length;
 970                 value = &src->ea_data[src->ea_name_length + 1];
 971                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 972
 973                 if (name_len == 0)
 974                         break;
 975
 976                 if (src_size < 8 + name_len + 1 + value_len) {
 977                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 978                         rc = -EIO;
 979                         goto out;
 980                 }
 981
 982                 if (ea_name) {
 983                         if (ea_name_len == name_len &&
 984                             memcmp(ea_name, name, name_len) == 0) {
 985                                 rc = value_len;
 986                                 if (dst_size == 0)
 987                                         goto out;
 988                                 if (dst_size < value_len) {
 989                                         rc = -ERANGE;
 990                                         goto out;
 991                                 }
 992                                 memcpy(dst, value, value_len);
 993                                 goto out;
 994                         }
 995                 } else {
 996                         /* 'user.' plus a terminating null */
 997                         user_name_len = 5 + 1 + name_len;
 998
 999                         if (buf_size == 0) {
1000                                 /* skip copy - calc size only */
1001                                 rc += user_name_len;
1002                         } else if (dst_size >= user_name_len) {
1003                                 dst_size -= user_name_len;
1004                                 memcpy(dst, "user.", 5);
1005                                 dst += 5;
1006                                 memcpy(dst, src->ea_data, name_len);
1007                                 dst += name_len;
1008                                 *dst = 0;
1009                                 ++dst;
1010                                 rc += user_name_len;
1011                         } else {
1012                                 /* stop before overrun buffer */
1013                                 rc = -ERANGE;
1014                                 break;
1015                         }
1016                 }
1017
1018                 if (!src->next_entry_offset)
1019                         break;
1020
1021                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1022                         /* stop before overrun buffer */
1023                         rc = -ERANGE;
1024                         break;
1025                 }
1026                 src_size -= le32_to_cpu(src->next_entry_offset);
1027                 src = (void *)((char *)src +
1028                                le32_to_cpu(src->next_entry_offset));
1029         }
1030
1031         /* didn't find the named attribute */
1032         if (ea_name)
1033                 rc = -ENODATA;
1034
1035 out:
1036         return (ssize_t)rc;
1037 }
1038
1039 static ssize_t
1040 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1041                const unsigned char *path, const unsigned char *ea_name,
1042                char *ea_data, size_t buf_size,
1043                struct cifs_sb_info *cifs_sb)
1044 {
1045         int rc;
1046         __le16 *utf16_path;
1047         struct kvec rsp_iov = {NULL, 0};
1048         int buftype = CIFS_NO_BUFFER;
1049         struct smb2_query_info_rsp *rsp;
1050         struct smb2_file_full_ea_info *info = NULL;
1051
1052         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1053         if (!utf16_path)
1054                 return -ENOMEM;
1055
1056         rc = smb2_query_info_compound(xid, tcon, utf16_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         kfree(utf16_path);
1090         free_rsp_buf(buftype, rsp_iov.iov_base);
1091         return rc;
1092 }
1093
1094
1095 static int
1096 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1097             const char *path, const char *ea_name, const void *ea_value,
1098             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1099             struct cifs_sb_info *cifs_sb)
1100 {
1101         struct cifs_ses *ses = tcon->ses;
1102         __le16 *utf16_path = NULL;
1103         int ea_name_len = strlen(ea_name);
1104         int flags = 0;
1105         int len;
1106         struct smb_rqst rqst[3];
1107         int resp_buftype[3];
1108         struct kvec rsp_iov[3];
1109         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1110         struct cifs_open_parms oparms;
1111         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1112         struct cifs_fid fid;
1113         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1114         unsigned int size[1];
1115         void *data[1];
1116         struct smb2_file_full_ea_info *ea = NULL;
1117         struct kvec close_iov[1];
1118         int rc;
1119
1120         if (smb3_encryption_required(tcon))
1121                 flags |= CIFS_TRANSFORM_REQ;
1122
1123         if (ea_name_len > 255)
1124                 return -EINVAL;
1125
1126         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1127         if (!utf16_path)
1128                 return -ENOMEM;
1129
1130         memset(rqst, 0, sizeof(rqst));
1131         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1132         memset(rsp_iov, 0, sizeof(rsp_iov));
1133
1134         if (ses->server->ops->query_all_EAs) {
1135                 if (!ea_value) {
1136                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1137                                                              ea_name, NULL, 0,
1138                                                              cifs_sb);
1139                         if (rc == -ENODATA)
1140                                 goto sea_exit;
1141                 }
1142         }
1143
1144         /* Open */
1145         memset(&open_iov, 0, sizeof(open_iov));
1146         rqst[0].rq_iov = open_iov;
1147         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1148
1149         memset(&oparms, 0, sizeof(oparms));
1150         oparms.tcon = tcon;
1151         oparms.desired_access = FILE_WRITE_EA;
1152         oparms.disposition = FILE_OPEN;
1153         if (backup_cred(cifs_sb))
1154                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1155         else
1156                 oparms.create_options = 0;
1157         oparms.fid = &fid;
1158         oparms.reconnect = false;
1159
1160         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
1161         if (rc)
1162                 goto sea_exit;
1163         smb2_set_next_command(tcon, &rqst[0]);
1164
1165
1166         /* Set Info */
1167         memset(&si_iov, 0, sizeof(si_iov));
1168         rqst[1].rq_iov = si_iov;
1169         rqst[1].rq_nvec = 1;
1170
1171         len = sizeof(ea) + ea_name_len + ea_value_len + 1;
1172         ea = kzalloc(len, GFP_KERNEL);
1173         if (ea == NULL) {
1174                 rc = -ENOMEM;
1175                 goto sea_exit;
1176         }
1177
1178         ea->ea_name_length = ea_name_len;
1179         ea->ea_value_length = cpu_to_le16(ea_value_len);
1180         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1181         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1182
1183         size[0] = len;
1184         data[0] = ea;
1185
1186         rc = SMB2_set_info_init(tcon, &rqst[1], COMPOUND_FID,
1187                                 COMPOUND_FID, current->tgid,
1188                                 FILE_FULL_EA_INFORMATION,
1189                                 SMB2_O_INFO_FILE, 0, data, size);
1190         smb2_set_next_command(tcon, &rqst[1]);
1191         smb2_set_related(&rqst[1]);
1192
1193
1194         /* Close */
1195         memset(&close_iov, 0, sizeof(close_iov));
1196         rqst[2].rq_iov = close_iov;
1197         rqst[2].rq_nvec = 1;
1198         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1199         smb2_set_related(&rqst[2]);
1200
1201         rc = compound_send_recv(xid, ses, flags, 3, rqst,
1202                                 resp_buftype, rsp_iov);
1203         /* no need to bump num_remote_opens because handle immediately closed */
1204
1205  sea_exit:
1206         kfree(ea);
1207         kfree(utf16_path);
1208         SMB2_open_free(&rqst[0]);
1209         SMB2_set_info_free(&rqst[1]);
1210         SMB2_close_free(&rqst[2]);
1211         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1212         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1213         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1214         return rc;
1215 }
1216 #endif
1217
1218 static bool
1219 smb2_can_echo(struct TCP_Server_Info *server)
1220 {
1221         return server->echoes;
1222 }
1223
1224 static void
1225 smb2_clear_stats(struct cifs_tcon *tcon)
1226 {
1227         int i;
1228
1229         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1230                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1231                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1232         }
1233 }
1234
1235 static void
1236 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1237 {
1238         seq_puts(m, "\n\tShare Capabilities:");
1239         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1240                 seq_puts(m, " DFS,");
1241         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1242                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1243         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1244                 seq_puts(m, " SCALEOUT,");
1245         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1246                 seq_puts(m, " CLUSTER,");
1247         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1248                 seq_puts(m, " ASYMMETRIC,");
1249         if (tcon->capabilities == 0)
1250                 seq_puts(m, " None");
1251         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1252                 seq_puts(m, " Aligned,");
1253         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1254                 seq_puts(m, " Partition Aligned,");
1255         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1256                 seq_puts(m, " SSD,");
1257         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1258                 seq_puts(m, " TRIM-support,");
1259
1260         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1261         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1262         if (tcon->perf_sector_size)
1263                 seq_printf(m, "\tOptimal sector size: 0x%x",
1264                            tcon->perf_sector_size);
1265         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1266 }
1267
1268 static void
1269 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1270 {
1271         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1272         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1273
1274         /*
1275          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1276          *  totals (requests sent) since those SMBs are per-session not per tcon
1277          */
1278         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1279                    (long long)(tcon->bytes_read),
1280                    (long long)(tcon->bytes_written));
1281         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1282                    atomic_read(&tcon->num_local_opens),
1283                    atomic_read(&tcon->num_remote_opens));
1284         seq_printf(m, "\nTreeConnects: %d total %d failed",
1285                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1286                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1287         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1288                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1289                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1290         seq_printf(m, "\nCreates: %d total %d failed",
1291                    atomic_read(&sent[SMB2_CREATE_HE]),
1292                    atomic_read(&failed[SMB2_CREATE_HE]));
1293         seq_printf(m, "\nCloses: %d total %d failed",
1294                    atomic_read(&sent[SMB2_CLOSE_HE]),
1295                    atomic_read(&failed[SMB2_CLOSE_HE]));
1296         seq_printf(m, "\nFlushes: %d total %d failed",
1297                    atomic_read(&sent[SMB2_FLUSH_HE]),
1298                    atomic_read(&failed[SMB2_FLUSH_HE]));
1299         seq_printf(m, "\nReads: %d total %d failed",
1300                    atomic_read(&sent[SMB2_READ_HE]),
1301                    atomic_read(&failed[SMB2_READ_HE]));
1302         seq_printf(m, "\nWrites: %d total %d failed",
1303                    atomic_read(&sent[SMB2_WRITE_HE]),
1304                    atomic_read(&failed[SMB2_WRITE_HE]));
1305         seq_printf(m, "\nLocks: %d total %d failed",
1306                    atomic_read(&sent[SMB2_LOCK_HE]),
1307                    atomic_read(&failed[SMB2_LOCK_HE]));
1308         seq_printf(m, "\nIOCTLs: %d total %d failed",
1309                    atomic_read(&sent[SMB2_IOCTL_HE]),
1310                    atomic_read(&failed[SMB2_IOCTL_HE]));
1311         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1312                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1313                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1314         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1315                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1316                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1317         seq_printf(m, "\nQueryInfos: %d total %d failed",
1318                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1319                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1320         seq_printf(m, "\nSetInfos: %d total %d failed",
1321                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1322                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1323         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1324                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1325                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1326 }
1327
1328 static void
1329 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1330 {
1331         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1332         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1333
1334         cfile->fid.persistent_fid = fid->persistent_fid;
1335         cfile->fid.volatile_fid = fid->volatile_fid;
1336 #ifdef CONFIG_CIFS_DEBUG2
1337         cfile->fid.mid = fid->mid;
1338 #endif /* CIFS_DEBUG2 */
1339         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1340                                       &fid->purge_cache);
1341         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1342         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1343 }
1344
1345 static void
1346 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1347                 struct cifs_fid *fid)
1348 {
1349         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1350 }
1351
1352 static void
1353 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1354                    struct cifsFileInfo *cfile)
1355 {
1356         struct smb2_file_network_open_info file_inf;
1357         struct inode *inode;
1358         int rc;
1359
1360         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1361                    cfile->fid.volatile_fid, &file_inf);
1362         if (rc)
1363                 return;
1364
1365         inode = d_inode(cfile->dentry);
1366
1367         spin_lock(&inode->i_lock);
1368         CIFS_I(inode)->time = jiffies;
1369
1370         /* Creation time should not need to be updated on close */
1371         if (file_inf.LastWriteTime)
1372                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1373         if (file_inf.ChangeTime)
1374                 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1375         if (file_inf.LastAccessTime)
1376                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1377
1378         /*
1379          * i_blocks is not related to (i_size / i_blksize),
1380          * but instead 512 byte (2**9) size is required for
1381          * calculating num blocks.
1382          */
1383         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1384                 inode->i_blocks =
1385                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1386
1387         /* End of file and Attributes should not have to be updated on close */
1388         spin_unlock(&inode->i_lock);
1389 }
1390
1391 static int
1392 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1393                      u64 persistent_fid, u64 volatile_fid,
1394                      struct copychunk_ioctl *pcchunk)
1395 {
1396         int rc;
1397         unsigned int ret_data_len;
1398         struct resume_key_req *res_key;
1399
1400         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1401                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1402                         NULL, 0 /* no input */, CIFSMaxBufSize,
1403                         (char **)&res_key, &ret_data_len);
1404
1405         if (rc) {
1406                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1407                 goto req_res_key_exit;
1408         }
1409         if (ret_data_len < sizeof(struct resume_key_req)) {
1410                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1411                 rc = -EINVAL;
1412                 goto req_res_key_exit;
1413         }
1414         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1415
1416 req_res_key_exit:
1417         kfree(res_key);
1418         return rc;
1419 }
1420
1421 static int
1422 smb2_ioctl_query_info(const unsigned int xid,
1423                       struct cifs_tcon *tcon,
1424                       __le16 *path, int is_dir,
1425                       unsigned long p)
1426 {
1427         struct cifs_ses *ses = tcon->ses;
1428         char __user *arg = (char __user *)p;
1429         struct smb_query_info qi;
1430         struct smb_query_info __user *pqi;
1431         int rc = 0;
1432         int flags = 0;
1433         struct smb2_query_info_rsp *qi_rsp = NULL;
1434         struct smb2_ioctl_rsp *io_rsp = NULL;
1435         void *buffer = NULL;
1436         struct smb_rqst rqst[3];
1437         int resp_buftype[3];
1438         struct kvec rsp_iov[3];
1439         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1440         struct cifs_open_parms oparms;
1441         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1442         struct cifs_fid fid;
1443         struct kvec qi_iov[1];
1444         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1445         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1446         struct kvec close_iov[1];
1447         unsigned int size[2];
1448         void *data[2];
1449
1450         memset(rqst, 0, sizeof(rqst));
1451         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1452         memset(rsp_iov, 0, sizeof(rsp_iov));
1453
1454         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1455                 return -EFAULT;
1456
1457         if (qi.output_buffer_length > 1024)
1458                 return -EINVAL;
1459
1460         if (!ses || !(ses->server))
1461                 return -EIO;
1462
1463         if (smb3_encryption_required(tcon))
1464                 flags |= CIFS_TRANSFORM_REQ;
1465
1466         buffer = memdup_user(arg + sizeof(struct smb_query_info),
1467                              qi.output_buffer_length);
1468         if (IS_ERR(buffer))
1469                 return PTR_ERR(buffer);
1470
1471         /* Open */
1472         memset(&open_iov, 0, sizeof(open_iov));
1473         rqst[0].rq_iov = open_iov;
1474         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1475
1476         memset(&oparms, 0, sizeof(oparms));
1477         oparms.tcon = tcon;
1478         oparms.disposition = FILE_OPEN;
1479         if (is_dir)
1480                 oparms.create_options = CREATE_NOT_FILE;
1481         else
1482                 oparms.create_options = CREATE_NOT_DIR;
1483         oparms.fid = &fid;
1484         oparms.reconnect = false;
1485
1486         if (qi.flags & PASSTHRU_FSCTL) {
1487                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1488                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1489                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1490                         break;
1491                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1492                         oparms.desired_access = GENERIC_ALL;
1493                         break;
1494                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1495                         oparms.desired_access = GENERIC_READ;
1496                         break;
1497                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1498                         oparms.desired_access = GENERIC_WRITE;
1499                         break;
1500                 }
1501         } else if (qi.flags & PASSTHRU_SET_INFO) {
1502                 oparms.desired_access = GENERIC_WRITE;
1503         } else {
1504                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1505         }
1506
1507         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
1508         if (rc)
1509                 goto iqinf_exit;
1510         smb2_set_next_command(tcon, &rqst[0]);
1511
1512         /* Query */
1513         if (qi.flags & PASSTHRU_FSCTL) {
1514                 /* Can eventually relax perm check since server enforces too */
1515                 if (!capable(CAP_SYS_ADMIN))
1516                         rc = -EPERM;
1517                 else  {
1518                         memset(&io_iov, 0, sizeof(io_iov));
1519                         rqst[1].rq_iov = io_iov;
1520                         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1521
1522                         rc = SMB2_ioctl_init(tcon, &rqst[1],
1523                                              COMPOUND_FID, COMPOUND_FID,
1524                                              qi.info_type, true, buffer,
1525                                              qi.output_buffer_length,
1526                                              CIFSMaxBufSize -
1527                                              MAX_SMB2_CREATE_RESPONSE_SIZE -
1528                                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
1529                 }
1530         } else if (qi.flags == PASSTHRU_SET_INFO) {
1531                 /* Can eventually relax perm check since server enforces too */
1532                 if (!capable(CAP_SYS_ADMIN))
1533                         rc = -EPERM;
1534                 else  {
1535                         memset(&si_iov, 0, sizeof(si_iov));
1536                         rqst[1].rq_iov = si_iov;
1537                         rqst[1].rq_nvec = 1;
1538
1539                         size[0] = 8;
1540                         data[0] = buffer;
1541
1542                         rc = SMB2_set_info_init(tcon, &rqst[1],
1543                                         COMPOUND_FID, COMPOUND_FID,
1544                                         current->tgid,
1545                                         FILE_END_OF_FILE_INFORMATION,
1546                                         SMB2_O_INFO_FILE, 0, data, size);
1547                 }
1548         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1549                 memset(&qi_iov, 0, sizeof(qi_iov));
1550                 rqst[1].rq_iov = qi_iov;
1551                 rqst[1].rq_nvec = 1;
1552
1553                 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
1554                                   COMPOUND_FID, qi.file_info_class,
1555                                   qi.info_type, qi.additional_information,
1556                                   qi.input_buffer_length,
1557                                   qi.output_buffer_length, buffer);
1558         } else { /* unknown flags */
1559                 cifs_tcon_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags);
1560                 rc = -EINVAL;
1561         }
1562
1563         if (rc)
1564                 goto iqinf_exit;
1565         smb2_set_next_command(tcon, &rqst[1]);
1566         smb2_set_related(&rqst[1]);
1567
1568         /* Close */
1569         memset(&close_iov, 0, sizeof(close_iov));
1570         rqst[2].rq_iov = close_iov;
1571         rqst[2].rq_nvec = 1;
1572
1573         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1574         if (rc)
1575                 goto iqinf_exit;
1576         smb2_set_related(&rqst[2]);
1577
1578         rc = compound_send_recv(xid, ses, flags, 3, rqst,
1579                                 resp_buftype, rsp_iov);
1580         if (rc)
1581                 goto iqinf_exit;
1582
1583         /* No need to bump num_remote_opens since handle immediately closed */
1584         if (qi.flags & PASSTHRU_FSCTL) {
1585                 pqi = (struct smb_query_info __user *)arg;
1586                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1587                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1588                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1589                 if (qi.input_buffer_length > 0 &&
1590                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1591                     > rsp_iov[1].iov_len)
1592                         goto e_fault;
1593
1594                 if (copy_to_user(&pqi->input_buffer_length,
1595                                  &qi.input_buffer_length,
1596                                  sizeof(qi.input_buffer_length)))
1597                         goto e_fault;
1598
1599                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1600                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1601                                  qi.input_buffer_length))
1602                         goto e_fault;
1603         } else {
1604                 pqi = (struct smb_query_info __user *)arg;
1605                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1606                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1607                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1608                 if (copy_to_user(&pqi->input_buffer_length,
1609                                  &qi.input_buffer_length,
1610                                  sizeof(qi.input_buffer_length)))
1611                         goto e_fault;
1612
1613                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1614                                  qi.input_buffer_length))
1615                         goto e_fault;
1616         }
1617
1618  iqinf_exit:
1619         kfree(buffer);
1620         SMB2_open_free(&rqst[0]);
1621         if (qi.flags & PASSTHRU_FSCTL)
1622                 SMB2_ioctl_free(&rqst[1]);
1623         else
1624                 SMB2_query_info_free(&rqst[1]);
1625
1626         SMB2_close_free(&rqst[2]);
1627         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1628         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1629         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1630         return rc;
1631
1632 e_fault:
1633         rc = -EFAULT;
1634         goto iqinf_exit;
1635 }
1636
1637 static ssize_t
1638 smb2_copychunk_range(const unsigned int xid,
1639                         struct cifsFileInfo *srcfile,
1640                         struct cifsFileInfo *trgtfile, u64 src_off,
1641                         u64 len, u64 dest_off)
1642 {
1643         int rc;
1644         unsigned int ret_data_len;
1645         struct copychunk_ioctl *pcchunk;
1646         struct copychunk_ioctl_rsp *retbuf = NULL;
1647         struct cifs_tcon *tcon;
1648         int chunks_copied = 0;
1649         bool chunk_sizes_updated = false;
1650         ssize_t bytes_written, total_bytes_written = 0;
1651
1652         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1653
1654         if (pcchunk == NULL)
1655                 return -ENOMEM;
1656
1657         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1658         /* Request a key from the server to identify the source of the copy */
1659         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1660                                 srcfile->fid.persistent_fid,
1661                                 srcfile->fid.volatile_fid, pcchunk);
1662
1663         /* Note: request_res_key sets res_key null only if rc !=0 */
1664         if (rc)
1665                 goto cchunk_out;
1666
1667         /* For now array only one chunk long, will make more flexible later */
1668         pcchunk->ChunkCount = cpu_to_le32(1);
1669         pcchunk->Reserved = 0;
1670         pcchunk->Reserved2 = 0;
1671
1672         tcon = tlink_tcon(trgtfile->tlink);
1673
1674         while (len > 0) {
1675                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1676                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1677                 pcchunk->Length =
1678                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1679
1680                 /* Request server copy to target from src identified by key */
1681                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1682                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1683                         true /* is_fsctl */, (char *)pcchunk,
1684                         sizeof(struct copychunk_ioctl), CIFSMaxBufSize,
1685                         (char **)&retbuf, &ret_data_len);
1686                 if (rc == 0) {
1687                         if (ret_data_len !=
1688                                         sizeof(struct copychunk_ioctl_rsp)) {
1689                                 cifs_tcon_dbg(VFS, "invalid cchunk response size\n");
1690                                 rc = -EIO;
1691                                 goto cchunk_out;
1692                         }
1693                         if (retbuf->TotalBytesWritten == 0) {
1694                                 cifs_dbg(FYI, "no bytes copied\n");
1695                                 rc = -EIO;
1696                                 goto cchunk_out;
1697                         }
1698                         /*
1699                          * Check if server claimed to write more than we asked
1700                          */
1701                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1702                             le32_to_cpu(pcchunk->Length)) {
1703                                 cifs_tcon_dbg(VFS, "invalid copy chunk response\n");
1704                                 rc = -EIO;
1705                                 goto cchunk_out;
1706                         }
1707                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1708                                 cifs_tcon_dbg(VFS, "invalid num chunks written\n");
1709                                 rc = -EIO;
1710                                 goto cchunk_out;
1711                         }
1712                         chunks_copied++;
1713
1714                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1715                         src_off += bytes_written;
1716                         dest_off += bytes_written;
1717                         len -= bytes_written;
1718                         total_bytes_written += bytes_written;
1719
1720                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1721                                 le32_to_cpu(retbuf->ChunksWritten),
1722                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1723                                 bytes_written);
1724                 } else if (rc == -EINVAL) {
1725                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1726                                 goto cchunk_out;
1727
1728                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1729                                 le32_to_cpu(retbuf->ChunksWritten),
1730                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1731                                 le32_to_cpu(retbuf->TotalBytesWritten));
1732
1733                         /*
1734                          * Check if this is the first request using these sizes,
1735                          * (ie check if copy succeed once with original sizes
1736                          * and check if the server gave us different sizes after
1737                          * we already updated max sizes on previous request).
1738                          * if not then why is the server returning an error now
1739                          */
1740                         if ((chunks_copied != 0) || chunk_sizes_updated)
1741                                 goto cchunk_out;
1742
1743                         /* Check that server is not asking us to grow size */
1744                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1745                                         tcon->max_bytes_chunk)
1746                                 tcon->max_bytes_chunk =
1747                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1748                         else
1749                                 goto cchunk_out; /* server gave us bogus size */
1750
1751                         /* No need to change MaxChunks since already set to 1 */
1752                         chunk_sizes_updated = true;
1753                 } else
1754                         goto cchunk_out;
1755         }
1756
1757 cchunk_out:
1758         kfree(pcchunk);
1759         kfree(retbuf);
1760         if (rc)
1761                 return rc;
1762         else
1763                 return total_bytes_written;
1764 }
1765
1766 static int
1767 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1768                 struct cifs_fid *fid)
1769 {
1770         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1771 }
1772
1773 static unsigned int
1774 smb2_read_data_offset(char *buf)
1775 {
1776         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1777
1778         return rsp->DataOffset;
1779 }
1780
1781 static unsigned int
1782 smb2_read_data_length(char *buf, bool in_remaining)
1783 {
1784         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1785
1786         if (in_remaining)
1787                 return le32_to_cpu(rsp->DataRemaining);
1788
1789         return le32_to_cpu(rsp->DataLength);
1790 }
1791
1792
1793 static int
1794 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1795                struct cifs_io_parms *parms, unsigned int *bytes_read,
1796                char **buf, int *buf_type)
1797 {
1798         parms->persistent_fid = pfid->persistent_fid;
1799         parms->volatile_fid = pfid->volatile_fid;
1800         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1801 }
1802
1803 static int
1804 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1805                 struct cifs_io_parms *parms, unsigned int *written,
1806                 struct kvec *iov, unsigned long nr_segs)
1807 {
1808
1809         parms->persistent_fid = pfid->persistent_fid;
1810         parms->volatile_fid = pfid->volatile_fid;
1811         return SMB2_write(xid, parms, written, iov, nr_segs);
1812 }
1813
1814 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1815 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1816                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1817 {
1818         struct cifsInodeInfo *cifsi;
1819         int rc;
1820
1821         cifsi = CIFS_I(inode);
1822
1823         /* if file already sparse don't bother setting sparse again */
1824         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1825                 return true; /* already sparse */
1826
1827         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1828                 return true; /* already not sparse */
1829
1830         /*
1831          * Can't check for sparse support on share the usual way via the
1832          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1833          * since Samba server doesn't set the flag on the share, yet
1834          * supports the set sparse FSCTL and returns sparse correctly
1835          * in the file attributes. If we fail setting sparse though we
1836          * mark that server does not support sparse files for this share
1837          * to avoid repeatedly sending the unsupported fsctl to server
1838          * if the file is repeatedly extended.
1839          */
1840         if (tcon->broken_sparse_sup)
1841                 return false;
1842
1843         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1844                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1845                         true /* is_fctl */,
1846                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1847         if (rc) {
1848                 tcon->broken_sparse_sup = true;
1849                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1850                 return false;
1851         }
1852
1853         if (setsparse)
1854                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1855         else
1856                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1857
1858         return true;
1859 }
1860
1861 static int
1862 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1863                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1864 {
1865         __le64 eof = cpu_to_le64(size);
1866         struct inode *inode;
1867
1868         /*
1869          * If extending file more than one page make sparse. Many Linux fs
1870          * make files sparse by default when extending via ftruncate
1871          */
1872         inode = d_inode(cfile->dentry);
1873
1874         if (!set_alloc && (size > inode->i_size + 8192)) {
1875                 __u8 set_sparse = 1;
1876
1877                 /* whether set sparse succeeds or not, extend the file */
1878                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1879         }
1880
1881         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1882                             cfile->fid.volatile_fid, cfile->pid, &eof);
1883 }
1884
1885 static int
1886 smb2_duplicate_extents(const unsigned int xid,
1887                         struct cifsFileInfo *srcfile,
1888                         struct cifsFileInfo *trgtfile, u64 src_off,
1889                         u64 len, u64 dest_off)
1890 {
1891         int rc;
1892         unsigned int ret_data_len;
1893         struct duplicate_extents_to_file dup_ext_buf;
1894         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1895
1896         /* server fileays advertise duplicate extent support with this flag */
1897         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1898              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1899                 return -EOPNOTSUPP;
1900
1901         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1902         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1903         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1904         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1905         dup_ext_buf.ByteCount = cpu_to_le64(len);
1906         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1907                 src_off, dest_off, len);
1908
1909         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1910         if (rc)
1911                 goto duplicate_extents_out;
1912
1913         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1914                         trgtfile->fid.volatile_fid,
1915                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1916                         true /* is_fsctl */,
1917                         (char *)&dup_ext_buf,
1918                         sizeof(struct duplicate_extents_to_file),
1919                         CIFSMaxBufSize, NULL,
1920                         &ret_data_len);
1921
1922         if (ret_data_len > 0)
1923                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1924
1925 duplicate_extents_out:
1926         return rc;
1927 }
1928
1929 static int
1930 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1931                    struct cifsFileInfo *cfile)
1932 {
1933         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1934                             cfile->fid.volatile_fid);
1935 }
1936
1937 static int
1938 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1939                    struct cifsFileInfo *cfile)
1940 {
1941         struct fsctl_set_integrity_information_req integr_info;
1942         unsigned int ret_data_len;
1943
1944         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1945         integr_info.Flags = 0;
1946         integr_info.Reserved = 0;
1947
1948         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1949                         cfile->fid.volatile_fid,
1950                         FSCTL_SET_INTEGRITY_INFORMATION,
1951                         true /* is_fsctl */,
1952                         (char *)&integr_info,
1953                         sizeof(struct fsctl_set_integrity_information_req),
1954                         CIFSMaxBufSize, NULL,
1955                         &ret_data_len);
1956
1957 }
1958
1959 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1960 #define GMT_TOKEN_SIZE 50
1961
1962 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1963
1964 /*
1965  * Input buffer contains (empty) struct smb_snapshot array with size filled in
1966  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1967  */
1968 static int
1969 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1970                    struct cifsFileInfo *cfile, void __user *ioc_buf)
1971 {
1972         char *retbuf = NULL;
1973         unsigned int ret_data_len = 0;
1974         int rc;
1975         u32 max_response_size;
1976         struct smb_snapshot_array snapshot_in;
1977
1978         /*
1979          * On the first query to enumerate the list of snapshots available
1980          * for this volume the buffer begins with 0 (number of snapshots
1981          * which can be returned is zero since at that point we do not know
1982          * how big the buffer needs to be). On the second query,
1983          * it (ret_data_len) is set to number of snapshots so we can
1984          * know to set the maximum response size larger (see below).
1985          */
1986         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
1987                 return -EFAULT;
1988
1989         /*
1990          * Note that for snapshot queries that servers like Azure expect that
1991          * the first query be minimal size (and just used to get the number/size
1992          * of previous versions) so response size must be specified as EXACTLY
1993          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
1994          * of eight bytes.
1995          */
1996         if (ret_data_len == 0)
1997                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
1998         else
1999                 max_response_size = CIFSMaxBufSize;
2000
2001         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2002                         cfile->fid.volatile_fid,
2003                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2004                         true /* is_fsctl */,
2005                         NULL, 0 /* no input data */, max_response_size,
2006                         (char **)&retbuf,
2007                         &ret_data_len);
2008         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2009                         rc, ret_data_len);
2010         if (rc)
2011                 return rc;
2012
2013         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2014                 /* Fixup buffer */
2015                 if (copy_from_user(&snapshot_in, ioc_buf,
2016                     sizeof(struct smb_snapshot_array))) {
2017                         rc = -EFAULT;
2018                         kfree(retbuf);
2019                         return rc;
2020                 }
2021
2022                 /*
2023                  * Check for min size, ie not large enough to fit even one GMT
2024                  * token (snapshot).  On the first ioctl some users may pass in
2025                  * smaller size (or zero) to simply get the size of the array
2026                  * so the user space caller can allocate sufficient memory
2027                  * and retry the ioctl again with larger array size sufficient
2028                  * to hold all of the snapshot GMT tokens on the second try.
2029                  */
2030                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2031                         ret_data_len = sizeof(struct smb_snapshot_array);
2032
2033                 /*
2034                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2035                  * the snapshot array (of 50 byte GMT tokens) each
2036                  * representing an available previous version of the data
2037                  */
2038                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2039                                         sizeof(struct smb_snapshot_array)))
2040                         ret_data_len = snapshot_in.snapshot_array_size +
2041                                         sizeof(struct smb_snapshot_array);
2042
2043                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2044                         rc = -EFAULT;
2045         }
2046
2047         kfree(retbuf);
2048         return rc;
2049 }
2050
2051 static int
2052 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2053                      const char *path, struct cifs_sb_info *cifs_sb,
2054                      struct cifs_fid *fid, __u16 search_flags,
2055                      struct cifs_search_info *srch_inf)
2056 {
2057         __le16 *utf16_path;
2058         struct smb_rqst rqst[2];
2059         struct kvec rsp_iov[2];
2060         int resp_buftype[2];
2061         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2062         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2063         int rc, flags = 0;
2064         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2065         struct cifs_open_parms oparms;
2066         struct smb2_query_directory_rsp *qd_rsp = NULL;
2067         struct smb2_create_rsp *op_rsp = NULL;
2068
2069         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2070         if (!utf16_path)
2071                 return -ENOMEM;
2072
2073         if (smb3_encryption_required(tcon))
2074                 flags |= CIFS_TRANSFORM_REQ;
2075
2076         memset(rqst, 0, sizeof(rqst));
2077         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2078         memset(rsp_iov, 0, sizeof(rsp_iov));
2079
2080         /* Open */
2081         memset(&open_iov, 0, sizeof(open_iov));
2082         rqst[0].rq_iov = open_iov;
2083         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2084
2085         oparms.tcon = tcon;
2086         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2087         oparms.disposition = FILE_OPEN;
2088         if (backup_cred(cifs_sb))
2089                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2090         else
2091                 oparms.create_options = 0;
2092         oparms.fid = fid;
2093         oparms.reconnect = false;
2094
2095         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2096         if (rc)
2097                 goto qdf_free;
2098         smb2_set_next_command(tcon, &rqst[0]);
2099
2100         /* Query directory */
2101         srch_inf->entries_in_buffer = 0;
2102         srch_inf->index_of_last_entry = 2;
2103
2104         memset(&qd_iov, 0, sizeof(qd_iov));
2105         rqst[1].rq_iov = qd_iov;
2106         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2107
2108         rc = SMB2_query_directory_init(xid, tcon, &rqst[1],
2109                                        COMPOUND_FID, COMPOUND_FID,
2110                                        0, srch_inf->info_level);
2111         if (rc)
2112                 goto qdf_free;
2113
2114         smb2_set_related(&rqst[1]);
2115
2116         rc = compound_send_recv(xid, tcon->ses, flags, 2, rqst,
2117                                 resp_buftype, rsp_iov);
2118
2119         /* If the open failed there is nothing to do */
2120         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2121         if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
2122                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2123                 goto qdf_free;
2124         }
2125         fid->persistent_fid = op_rsp->PersistentFileId;
2126         fid->volatile_fid = op_rsp->VolatileFileId;
2127
2128         /* Anything else than ENODATA means a genuine error */
2129         if (rc && rc != -ENODATA) {
2130                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2131                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2132                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2133                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2134                 goto qdf_free;
2135         }
2136
2137         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2138         if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
2139                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2140                                           tcon->tid, tcon->ses->Suid, 0, 0);
2141                 srch_inf->endOfSearch = true;
2142                 rc = 0;
2143                 goto qdf_free;
2144         }
2145
2146         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2147                                         srch_inf);
2148         if (rc) {
2149                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2150                         tcon->ses->Suid, 0, 0, rc);
2151                 goto qdf_free;
2152         }
2153         resp_buftype[1] = CIFS_NO_BUFFER;
2154
2155         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2156                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2157
2158  qdf_free:
2159         kfree(utf16_path);
2160         SMB2_open_free(&rqst[0]);
2161         SMB2_query_directory_free(&rqst[1]);
2162         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2163         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2164         return rc;
2165 }
2166
2167 static int
2168 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2169                     struct cifs_fid *fid, __u16 search_flags,
2170                     struct cifs_search_info *srch_inf)
2171 {
2172         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2173                                     fid->volatile_fid, 0, srch_inf);
2174 }
2175
2176 static int
2177 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2178                struct cifs_fid *fid)
2179 {
2180         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2181 }
2182
2183 /*
2184  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2185  * the number of credits and return true. Otherwise - return false.
2186  */
2187 static bool
2188 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2189 {
2190         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2191
2192         if (shdr->Status != STATUS_PENDING)
2193                 return false;
2194
2195         if (shdr->CreditRequest) {
2196                 spin_lock(&server->req_lock);
2197                 server->credits += le16_to_cpu(shdr->CreditRequest);
2198                 spin_unlock(&server->req_lock);
2199                 wake_up(&server->request_q);
2200         }
2201
2202         return true;
2203 }
2204
2205 static bool
2206 smb2_is_session_expired(char *buf)
2207 {
2208         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2209
2210         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2211             shdr->Status != STATUS_USER_SESSION_DELETED)
2212                 return false;
2213
2214         trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2215                                le16_to_cpu(shdr->Command),
2216                                le64_to_cpu(shdr->MessageId));
2217         cifs_dbg(FYI, "Session expired or deleted\n");
2218
2219         return true;
2220 }
2221
2222 static int
2223 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2224                      struct cifsInodeInfo *cinode)
2225 {
2226         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2227                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2228                                         smb2_get_lease_state(cinode));
2229
2230         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2231                                  fid->volatile_fid,
2232                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2233 }
2234
2235 void
2236 smb2_set_related(struct smb_rqst *rqst)
2237 {
2238         struct smb2_sync_hdr *shdr;
2239
2240         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2241         if (shdr == NULL) {
2242                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2243                 return;
2244         }
2245         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2246 }
2247
2248 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2249
2250 void
2251 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2252 {
2253         struct smb2_sync_hdr *shdr;
2254         struct cifs_ses *ses = tcon->ses;
2255         struct TCP_Server_Info *server = ses->server;
2256         unsigned long len = smb_rqst_len(server, rqst);
2257         int i, num_padding;
2258
2259         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2260         if (shdr == NULL) {
2261                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2262                 return;
2263         }
2264
2265         /* SMB headers in a compound are 8 byte aligned. */
2266
2267         /* No padding needed */
2268         if (!(len & 7))
2269                 goto finished;
2270
2271         num_padding = 8 - (len & 7);
2272         if (!smb3_encryption_required(tcon)) {
2273                 /*
2274                  * If we do not have encryption then we can just add an extra
2275                  * iov for the padding.
2276                  */
2277                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2278                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2279                 rqst->rq_nvec++;
2280                 len += num_padding;
2281         } else {
2282                 /*
2283                  * We can not add a small padding iov for the encryption case
2284                  * because the encryption framework can not handle the padding
2285                  * iovs.
2286                  * We have to flatten this into a single buffer and add
2287                  * the padding to it.
2288                  */
2289                 for (i = 1; i < rqst->rq_nvec; i++) {
2290                         memcpy(rqst->rq_iov[0].iov_base +
2291                                rqst->rq_iov[0].iov_len,
2292                                rqst->rq_iov[i].iov_base,
2293                                rqst->rq_iov[i].iov_len);
2294                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2295                 }
2296                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2297                        0, num_padding);
2298                 rqst->rq_iov[0].iov_len += num_padding;
2299                 len += num_padding;
2300                 rqst->rq_nvec = 1;
2301         }
2302
2303  finished:
2304         shdr->NextCommand = cpu_to_le32(len);
2305 }
2306
2307 /*
2308  * Passes the query info response back to the caller on success.
2309  * Caller need to free this with free_rsp_buf().
2310  */
2311 int
2312 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2313                          __le16 *utf16_path, u32 desired_access,
2314                          u32 class, u32 type, u32 output_len,
2315                          struct kvec *rsp, int *buftype,
2316                          struct cifs_sb_info *cifs_sb)
2317 {
2318         struct cifs_ses *ses = tcon->ses;
2319         int flags = 0;
2320         struct smb_rqst rqst[3];
2321         int resp_buftype[3];
2322         struct kvec rsp_iov[3];
2323         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2324         struct kvec qi_iov[1];
2325         struct kvec close_iov[1];
2326         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2327         struct cifs_open_parms oparms;
2328         struct cifs_fid fid;
2329         int rc;
2330
2331         if (smb3_encryption_required(tcon))
2332                 flags |= CIFS_TRANSFORM_REQ;
2333
2334         memset(rqst, 0, sizeof(rqst));
2335         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2336         memset(rsp_iov, 0, sizeof(rsp_iov));
2337
2338         memset(&open_iov, 0, sizeof(open_iov));
2339         rqst[0].rq_iov = open_iov;
2340         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2341
2342         oparms.tcon = tcon;
2343         oparms.desired_access = desired_access;
2344         oparms.disposition = FILE_OPEN;
2345         if (cifs_sb && backup_cred(cifs_sb))
2346                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2347         else
2348                 oparms.create_options = 0;
2349         oparms.fid = &fid;
2350         oparms.reconnect = false;
2351
2352         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2353         if (rc)
2354                 goto qic_exit;
2355         smb2_set_next_command(tcon, &rqst[0]);
2356
2357         memset(&qi_iov, 0, sizeof(qi_iov));
2358         rqst[1].rq_iov = qi_iov;
2359         rqst[1].rq_nvec = 1;
2360
2361         rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
2362                                   class, type, 0,
2363                                   output_len, 0,
2364                                   NULL);
2365         if (rc)
2366                 goto qic_exit;
2367         smb2_set_next_command(tcon, &rqst[1]);
2368         smb2_set_related(&rqst[1]);
2369
2370         memset(&close_iov, 0, sizeof(close_iov));
2371         rqst[2].rq_iov = close_iov;
2372         rqst[2].rq_nvec = 1;
2373
2374         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2375         if (rc)
2376                 goto qic_exit;
2377         smb2_set_related(&rqst[2]);
2378
2379         rc = compound_send_recv(xid, ses, flags, 3, rqst,
2380                                 resp_buftype, rsp_iov);
2381         if (rc) {
2382                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2383                 if (rc == -EREMCHG) {
2384                         tcon->need_reconnect = true;
2385                         printk_once(KERN_WARNING "server share %s deleted\n",
2386                                     tcon->treeName);
2387                 }
2388                 goto qic_exit;
2389         }
2390         *rsp = rsp_iov[1];
2391         *buftype = resp_buftype[1];
2392
2393  qic_exit:
2394         SMB2_open_free(&rqst[0]);
2395         SMB2_query_info_free(&rqst[1]);
2396         SMB2_close_free(&rqst[2]);
2397         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2398         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2399         return rc;
2400 }
2401
2402 static int
2403 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2404              struct kstatfs *buf)
2405 {
2406         struct smb2_query_info_rsp *rsp;
2407         struct smb2_fs_full_size_info *info = NULL;
2408         __le16 utf16_path = 0; /* Null - open root of share */
2409         struct kvec rsp_iov = {NULL, 0};
2410         int buftype = CIFS_NO_BUFFER;
2411         int rc;
2412
2413
2414         rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2415                                       FILE_READ_ATTRIBUTES,
2416                                       FS_FULL_SIZE_INFORMATION,
2417                                       SMB2_O_INFO_FILESYSTEM,
2418                                       sizeof(struct smb2_fs_full_size_info),
2419                                       &rsp_iov, &buftype, NULL);
2420         if (rc)
2421                 goto qfs_exit;
2422
2423         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2424         buf->f_type = SMB2_MAGIC_NUMBER;
2425         info = (struct smb2_fs_full_size_info *)(
2426                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2427         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2428                                le32_to_cpu(rsp->OutputBufferLength),
2429                                &rsp_iov,
2430                                sizeof(struct smb2_fs_full_size_info));
2431         if (!rc)
2432                 smb2_copy_fs_info_to_kstatfs(info, buf);
2433
2434 qfs_exit:
2435         free_rsp_buf(buftype, rsp_iov.iov_base);
2436         return rc;
2437 }
2438
2439 static int
2440 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2441              struct kstatfs *buf)
2442 {
2443         int rc;
2444         __le16 srch_path = 0; /* Null - open root of share */
2445         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2446         struct cifs_open_parms oparms;
2447         struct cifs_fid fid;
2448
2449         if (!tcon->posix_extensions)
2450                 return smb2_queryfs(xid, tcon, buf);
2451
2452         oparms.tcon = tcon;
2453         oparms.desired_access = FILE_READ_ATTRIBUTES;
2454         oparms.disposition = FILE_OPEN;
2455         oparms.create_options = 0;
2456         oparms.fid = &fid;
2457         oparms.reconnect = false;
2458
2459         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
2460         if (rc)
2461                 return rc;
2462
2463         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2464                                    fid.volatile_fid, buf);
2465         buf->f_type = SMB2_MAGIC_NUMBER;
2466         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2467         return rc;
2468 }
2469
2470 static bool
2471 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2472 {
2473         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2474                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2475 }
2476
2477 static int
2478 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2479                __u64 length, __u32 type, int lock, int unlock, bool wait)
2480 {
2481         if (unlock && !lock)
2482                 type = SMB2_LOCKFLAG_UNLOCK;
2483         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2484                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2485                          current->tgid, length, offset, type, wait);
2486 }
2487
2488 static void
2489 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2490 {
2491         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2492 }
2493
2494 static void
2495 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2496 {
2497         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2498 }
2499
2500 static void
2501 smb2_new_lease_key(struct cifs_fid *fid)
2502 {
2503         generate_random_uuid(fid->lease_key);
2504 }
2505
2506 static int
2507 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2508                    const char *search_name,
2509                    struct dfs_info3_param **target_nodes,
2510                    unsigned int *num_of_nodes,
2511                    const struct nls_table *nls_codepage, int remap)
2512 {
2513         int rc;
2514         __le16 *utf16_path = NULL;
2515         int utf16_path_len = 0;
2516         struct cifs_tcon *tcon;
2517         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2518         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2519         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2520
2521         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2522
2523         /*
2524          * Try to use the IPC tcon, otherwise just use any
2525          */
2526         tcon = ses->tcon_ipc;
2527         if (tcon == NULL) {
2528                 spin_lock(&cifs_tcp_ses_lock);
2529                 tcon = list_first_entry_or_null(&ses->tcon_list,
2530                                                 struct cifs_tcon,
2531                                                 tcon_list);
2532                 if (tcon)
2533                         tcon->tc_count++;
2534                 spin_unlock(&cifs_tcp_ses_lock);
2535         }
2536
2537         if (tcon == NULL) {
2538                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2539                          ses);
2540                 rc = -ENOTCONN;
2541                 goto out;
2542         }
2543
2544         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2545                                            &utf16_path_len,
2546                                            nls_codepage, remap);
2547         if (!utf16_path) {
2548                 rc = -ENOMEM;
2549                 goto out;
2550         }
2551
2552         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2553         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2554         if (!dfs_req) {
2555                 rc = -ENOMEM;
2556                 goto out;
2557         }
2558
2559         /* Highest DFS referral version understood */
2560         dfs_req->MaxReferralLevel = DFS_VERSION;
2561
2562         /* Path to resolve in an UTF-16 null-terminated string */
2563         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2564
2565         do {
2566                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2567                                 FSCTL_DFS_GET_REFERRALS,
2568                                 true /* is_fsctl */,
2569                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2570                                 (char **)&dfs_rsp, &dfs_rsp_size);
2571         } while (rc == -EAGAIN);
2572
2573         if (rc) {
2574                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2575                         cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2576                 goto out;
2577         }
2578
2579         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2580                                  num_of_nodes, target_nodes,
2581                                  nls_codepage, remap, search_name,
2582                                  true /* is_unicode */);
2583         if (rc) {
2584                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2585                 goto out;
2586         }
2587
2588  out:
2589         if (tcon && !tcon->ipc) {
2590                 /* ipc tcons are not refcounted */
2591                 spin_lock(&cifs_tcp_ses_lock);
2592                 tcon->tc_count--;
2593                 spin_unlock(&cifs_tcp_ses_lock);
2594         }
2595         kfree(utf16_path);
2596         kfree(dfs_req);
2597         kfree(dfs_rsp);
2598         return rc;
2599 }
2600
2601 static int
2602 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2603                       u32 plen, char **target_path,
2604                       struct cifs_sb_info *cifs_sb)
2605 {
2606         unsigned int len;
2607
2608         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2609         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2610
2611         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2612                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2613                         le64_to_cpu(symlink_buf->InodeType));
2614                 return -EOPNOTSUPP;
2615         }
2616
2617         *target_path = cifs_strndup_from_utf16(
2618                                 symlink_buf->PathBuffer,
2619                                 len, true, cifs_sb->local_nls);
2620         if (!(*target_path))
2621                 return -ENOMEM;
2622
2623         convert_delimiter(*target_path, '/');
2624         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2625
2626         return 0;
2627 }
2628
2629 static int
2630 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2631                       u32 plen, char **target_path,
2632                       struct cifs_sb_info *cifs_sb)
2633 {
2634         unsigned int sub_len;
2635         unsigned int sub_offset;
2636
2637         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2638
2639         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2640         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2641         if (sub_offset + 20 > plen ||
2642             sub_offset + sub_len + 20 > plen) {
2643                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2644                 return -EIO;
2645         }
2646
2647         *target_path = cifs_strndup_from_utf16(
2648                                 symlink_buf->PathBuffer + sub_offset,
2649                                 sub_len, true, cifs_sb->local_nls);
2650         if (!(*target_path))
2651                 return -ENOMEM;
2652
2653         convert_delimiter(*target_path, '/');
2654         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2655
2656         return 0;
2657 }
2658
2659 static int
2660 parse_reparse_point(struct reparse_data_buffer *buf,
2661                     u32 plen, char **target_path,
2662                     struct cifs_sb_info *cifs_sb)
2663 {
2664         if (plen < sizeof(struct reparse_data_buffer)) {
2665                 cifs_dbg(VFS, "reparse buffer is too small. Must be "
2666                          "at least 8 bytes but was %d\n", plen);
2667                 return -EIO;
2668         }
2669
2670         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2671             sizeof(struct reparse_data_buffer)) {
2672                 cifs_dbg(VFS, "srv returned invalid reparse buf "
2673                          "length: %d\n", plen);
2674                 return -EIO;
2675         }
2676
2677         /* See MS-FSCC 2.1.2 */
2678         switch (le32_to_cpu(buf->ReparseTag)) {
2679         case IO_REPARSE_TAG_NFS:
2680                 return parse_reparse_posix(
2681                         (struct reparse_posix_data *)buf,
2682                         plen, target_path, cifs_sb);
2683         case IO_REPARSE_TAG_SYMLINK:
2684                 return parse_reparse_symlink(
2685                         (struct reparse_symlink_data_buffer *)buf,
2686                         plen, target_path, cifs_sb);
2687         default:
2688                 cifs_dbg(VFS, "srv returned unknown symlink buffer "
2689                          "tag:0x%08x\n", le32_to_cpu(buf->ReparseTag));
2690                 return -EOPNOTSUPP;
2691         }
2692 }
2693
2694 #define SMB2_SYMLINK_STRUCT_SIZE \
2695         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2696
2697 static int
2698 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2699                    struct cifs_sb_info *cifs_sb, const char *full_path,
2700                    char **target_path, bool is_reparse_point)
2701 {
2702         int rc;
2703         __le16 *utf16_path = NULL;
2704         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2705         struct cifs_open_parms oparms;
2706         struct cifs_fid fid;
2707         struct kvec err_iov = {NULL, 0};
2708         struct smb2_err_rsp *err_buf = NULL;
2709         struct smb2_symlink_err_rsp *symlink;
2710         unsigned int sub_len;
2711         unsigned int sub_offset;
2712         unsigned int print_len;
2713         unsigned int print_offset;
2714         int flags = 0;
2715         struct smb_rqst rqst[3];
2716         int resp_buftype[3];
2717         struct kvec rsp_iov[3];
2718         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2719         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2720         struct kvec close_iov[1];
2721         struct smb2_create_rsp *create_rsp;
2722         struct smb2_ioctl_rsp *ioctl_rsp;
2723         struct reparse_data_buffer *reparse_buf;
2724         u32 plen;
2725
2726         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2727
2728         *target_path = NULL;
2729
2730         if (smb3_encryption_required(tcon))
2731                 flags |= CIFS_TRANSFORM_REQ;
2732
2733         memset(rqst, 0, sizeof(rqst));
2734         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2735         memset(rsp_iov, 0, sizeof(rsp_iov));
2736
2737         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2738         if (!utf16_path)
2739                 return -ENOMEM;
2740
2741         /* Open */
2742         memset(&open_iov, 0, sizeof(open_iov));
2743         rqst[0].rq_iov = open_iov;
2744         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2745
2746         memset(&oparms, 0, sizeof(oparms));
2747         oparms.tcon = tcon;
2748         oparms.desired_access = FILE_READ_ATTRIBUTES;
2749         oparms.disposition = FILE_OPEN;
2750
2751         if (backup_cred(cifs_sb))
2752                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2753         else
2754                 oparms.create_options = 0;
2755         if (is_reparse_point)
2756                 oparms.create_options = OPEN_REPARSE_POINT;
2757
2758         oparms.fid = &fid;
2759         oparms.reconnect = false;
2760
2761         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2762         if (rc)
2763                 goto querty_exit;
2764         smb2_set_next_command(tcon, &rqst[0]);
2765
2766
2767         /* IOCTL */
2768         memset(&io_iov, 0, sizeof(io_iov));
2769         rqst[1].rq_iov = io_iov;
2770         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2771
2772         rc = SMB2_ioctl_init(tcon, &rqst[1], fid.persistent_fid,
2773                              fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
2774                              true /* is_fctl */, NULL, 0,
2775                              CIFSMaxBufSize -
2776                              MAX_SMB2_CREATE_RESPONSE_SIZE -
2777                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
2778         if (rc)
2779                 goto querty_exit;
2780
2781         smb2_set_next_command(tcon, &rqst[1]);
2782         smb2_set_related(&rqst[1]);
2783
2784
2785         /* Close */
2786         memset(&close_iov, 0, sizeof(close_iov));
2787         rqst[2].rq_iov = close_iov;
2788         rqst[2].rq_nvec = 1;
2789
2790         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2791         if (rc)
2792                 goto querty_exit;
2793
2794         smb2_set_related(&rqst[2]);
2795
2796         rc = compound_send_recv(xid, tcon->ses, flags, 3, rqst,
2797                                 resp_buftype, rsp_iov);
2798
2799         create_rsp = rsp_iov[0].iov_base;
2800         if (create_rsp && create_rsp->sync_hdr.Status)
2801                 err_iov = rsp_iov[0];
2802         ioctl_rsp = rsp_iov[1].iov_base;
2803
2804         /*
2805          * Open was successful and we got an ioctl response.
2806          */
2807         if ((rc == 0) && (is_reparse_point)) {
2808                 /* See MS-FSCC 2.3.23 */
2809
2810                 reparse_buf = (struct reparse_data_buffer *)
2811                         ((char *)ioctl_rsp +
2812                          le32_to_cpu(ioctl_rsp->OutputOffset));
2813                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
2814
2815                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
2816                     rsp_iov[1].iov_len) {
2817                         cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
2818                                  plen);
2819                         rc = -EIO;
2820                         goto querty_exit;
2821                 }
2822
2823                 rc = parse_reparse_point(reparse_buf, plen, target_path,
2824                                          cifs_sb);
2825                 goto querty_exit;
2826         }
2827
2828         if (!rc || !err_iov.iov_base) {
2829                 rc = -ENOENT;
2830                 goto querty_exit;
2831         }
2832
2833         err_buf = err_iov.iov_base;
2834         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
2835             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
2836                 rc = -EINVAL;
2837                 goto querty_exit;
2838         }
2839
2840         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2841         if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
2842             le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
2843                 rc = -EINVAL;
2844                 goto querty_exit;
2845         }
2846
2847         /* open must fail on symlink - reset rc */
2848         rc = 0;
2849         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2850         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
2851         print_len = le16_to_cpu(symlink->PrintNameLength);
2852         print_offset = le16_to_cpu(symlink->PrintNameOffset);
2853
2854         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
2855                 rc = -EINVAL;
2856                 goto querty_exit;
2857         }
2858
2859         if (err_iov.iov_len <
2860             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
2861                 rc = -EINVAL;
2862                 goto querty_exit;
2863         }
2864
2865         *target_path = cifs_strndup_from_utf16(
2866                                 (char *)symlink->PathBuffer + sub_offset,
2867                                 sub_len, true, cifs_sb->local_nls);
2868         if (!(*target_path)) {
2869                 rc = -ENOMEM;
2870                 goto querty_exit;
2871         }
2872         convert_delimiter(*target_path, '/');
2873         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2874
2875  querty_exit:
2876         cifs_dbg(FYI, "query symlink rc %d\n", rc);
2877         kfree(utf16_path);
2878         SMB2_open_free(&rqst[0]);
2879         SMB2_ioctl_free(&rqst[1]);
2880         SMB2_close_free(&rqst[2]);
2881         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2882         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2883         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2884         return rc;
2885 }
2886
2887 static struct cifs_ntsd *
2888 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2889                 const struct cifs_fid *cifsfid, u32 *pacllen)
2890 {
2891         struct cifs_ntsd *pntsd = NULL;
2892         unsigned int xid;
2893         int rc = -EOPNOTSUPP;
2894         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2895
2896         if (IS_ERR(tlink))
2897                 return ERR_CAST(tlink);
2898
2899         xid = get_xid();
2900         cifs_dbg(FYI, "trying to get acl\n");
2901
2902         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2903                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
2904         free_xid(xid);
2905
2906         cifs_put_tlink(tlink);
2907
2908         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2909         if (rc)
2910                 return ERR_PTR(rc);
2911         return pntsd;
2912
2913 }
2914
2915 static struct cifs_ntsd *
2916 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
2917                 const char *path, u32 *pacllen)
2918 {
2919         struct cifs_ntsd *pntsd = NULL;
2920         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2921         unsigned int xid;
2922         int rc;
2923         struct cifs_tcon *tcon;
2924         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2925         struct cifs_fid fid;
2926         struct cifs_open_parms oparms;
2927         __le16 *utf16_path;
2928
2929         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
2930         if (IS_ERR(tlink))
2931                 return ERR_CAST(tlink);
2932
2933         tcon = tlink_tcon(tlink);
2934         xid = get_xid();
2935
2936         if (backup_cred(cifs_sb))
2937                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2938         else
2939                 oparms.create_options = 0;
2940
2941         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2942         if (!utf16_path) {
2943                 rc = -ENOMEM;
2944                 free_xid(xid);
2945                 return ERR_PTR(rc);
2946         }
2947
2948         oparms.tcon = tcon;
2949         oparms.desired_access = READ_CONTROL;
2950         oparms.disposition = FILE_OPEN;
2951         oparms.fid = &fid;
2952         oparms.reconnect = false;
2953
2954         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2955         kfree(utf16_path);
2956         if (!rc) {
2957                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2958                             fid.volatile_fid, (void **)&pntsd, pacllen);
2959                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2960         }
2961
2962         cifs_put_tlink(tlink);
2963         free_xid(xid);
2964
2965         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2966         if (rc)
2967                 return ERR_PTR(rc);
2968         return pntsd;
2969 }
2970
2971 static int
2972 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
2973                 struct inode *inode, const char *path, int aclflag)
2974 {
2975         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2976         unsigned int xid;
2977         int rc, access_flags = 0;
2978         struct cifs_tcon *tcon;
2979         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2980         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2981         struct cifs_fid fid;
2982         struct cifs_open_parms oparms;
2983         __le16 *utf16_path;
2984
2985         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
2986         if (IS_ERR(tlink))
2987                 return PTR_ERR(tlink);
2988
2989         tcon = tlink_tcon(tlink);
2990         xid = get_xid();
2991
2992         if (backup_cred(cifs_sb))
2993                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2994         else
2995                 oparms.create_options = 0;
2996
2997         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
2998                 access_flags = WRITE_OWNER;
2999         else
3000                 access_flags = WRITE_DAC;
3001
3002         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3003         if (!utf16_path) {
3004                 rc = -ENOMEM;
3005                 free_xid(xid);
3006                 return rc;
3007         }
3008
3009         oparms.tcon = tcon;
3010         oparms.desired_access = access_flags;
3011         oparms.disposition = FILE_OPEN;
3012         oparms.path = path;
3013         oparms.fid = &fid;
3014         oparms.reconnect = false;
3015
3016         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
3017         kfree(utf16_path);
3018         if (!rc) {
3019                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3020                             fid.volatile_fid, pnntsd, acllen, aclflag);
3021                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3022         }
3023
3024         cifs_put_tlink(tlink);
3025         free_xid(xid);
3026         return rc;
3027 }
3028
3029 /* Retrieve an ACL from the server */
3030 static struct cifs_ntsd *
3031 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3032                                       struct inode *inode, const char *path,
3033                                       u32 *pacllen)
3034 {
3035         struct cifs_ntsd *pntsd = NULL;
3036         struct cifsFileInfo *open_file = NULL;
3037
3038         if (inode)
3039                 open_file = find_readable_file(CIFS_I(inode), true);
3040         if (!open_file)
3041                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
3042
3043         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
3044         cifsFileInfo_put(open_file);
3045         return pntsd;
3046 }
3047
3048 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3049                             loff_t offset, loff_t len, bool keep_size)
3050 {
3051         struct cifs_ses *ses = tcon->ses;
3052         struct inode *inode;
3053         struct cifsInodeInfo *cifsi;
3054         struct cifsFileInfo *cfile = file->private_data;
3055         struct file_zero_data_information fsctl_buf;
3056         long rc;
3057         unsigned int xid;
3058         __le64 eof;
3059
3060         xid = get_xid();
3061
3062         inode = d_inode(cfile->dentry);
3063         cifsi = CIFS_I(inode);
3064
3065         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3066                               ses->Suid, offset, len);
3067
3068
3069         /* if file not oplocked can't be sure whether asking to extend size */
3070         if (!CIFS_CACHE_READ(cifsi))
3071                 if (keep_size == false) {
3072                         rc = -EOPNOTSUPP;
3073                         trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3074                                 tcon->tid, ses->Suid, offset, len, rc);
3075                         free_xid(xid);
3076                         return rc;
3077                 }
3078
3079         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3080
3081         fsctl_buf.FileOffset = cpu_to_le64(offset);
3082         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3083
3084         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3085                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
3086                         (char *)&fsctl_buf,
3087                         sizeof(struct file_zero_data_information),
3088                         0, NULL, NULL);
3089         if (rc)
3090                 goto zero_range_exit;
3091
3092         /*
3093          * do we also need to change the size of the file?
3094          */
3095         if (keep_size == false && i_size_read(inode) < offset + len) {
3096                 eof = cpu_to_le64(offset + len);
3097                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3098                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3099         }
3100
3101  zero_range_exit:
3102         free_xid(xid);
3103         if (rc)
3104                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3105                               ses->Suid, offset, len, rc);
3106         else
3107                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3108                               ses->Suid, offset, len);
3109         return rc;
3110 }
3111
3112 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3113                             loff_t offset, loff_t len)
3114 {
3115         struct inode *inode;
3116         struct cifsFileInfo *cfile = file->private_data;
3117         struct file_zero_data_information fsctl_buf;
3118         long rc;
3119         unsigned int xid;
3120         __u8 set_sparse = 1;
3121
3122         xid = get_xid();
3123
3124         inode = d_inode(cfile->dentry);
3125
3126         /* Need to make file sparse, if not already, before freeing range. */
3127         /* Consider adding equivalent for compressed since it could also work */
3128         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3129                 rc = -EOPNOTSUPP;
3130                 free_xid(xid);
3131                 return rc;
3132         }
3133
3134         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3135
3136         fsctl_buf.FileOffset = cpu_to_le64(offset);
3137         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3138
3139         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3140                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3141                         true /* is_fctl */, (char *)&fsctl_buf,
3142                         sizeof(struct file_zero_data_information),
3143                         CIFSMaxBufSize, NULL, NULL);
3144         free_xid(xid);
3145         return rc;
3146 }
3147
3148 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3149                             loff_t off, loff_t len, bool keep_size)
3150 {
3151         struct inode *inode;
3152         struct cifsInodeInfo *cifsi;
3153         struct cifsFileInfo *cfile = file->private_data;
3154         long rc = -EOPNOTSUPP;
3155         unsigned int xid;
3156         __le64 eof;
3157
3158         xid = get_xid();
3159
3160         inode = d_inode(cfile->dentry);
3161         cifsi = CIFS_I(inode);
3162
3163         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3164                                 tcon->ses->Suid, off, len);
3165         /* if file not oplocked can't be sure whether asking to extend size */
3166         if (!CIFS_CACHE_READ(cifsi))
3167                 if (keep_size == false) {
3168                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3169                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3170                         free_xid(xid);
3171                         return rc;
3172                 }
3173
3174         /*
3175          * Files are non-sparse by default so falloc may be a no-op
3176          * Must check if file sparse. If not sparse, and not extending
3177          * then no need to do anything since file already allocated
3178          */
3179         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3180                 if (keep_size == true)
3181                         rc = 0;
3182                 /* check if extending file */
3183                 else if (i_size_read(inode) >= off + len)
3184                         /* not extending file and already not sparse */
3185                         rc = 0;
3186                 /* BB: in future add else clause to extend file */
3187                 else
3188                         rc = -EOPNOTSUPP;
3189                 if (rc)
3190                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3191                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3192                 else
3193                         trace_smb3_falloc_done(xid, cfile->fid.persistent_fid,
3194                                 tcon->tid, tcon->ses->Suid, off, len);
3195                 free_xid(xid);
3196                 return rc;
3197         }
3198
3199         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3200                 /*
3201                  * Check if falloc starts within first few pages of file
3202                  * and ends within a few pages of the end of file to
3203                  * ensure that most of file is being forced to be
3204                  * fallocated now. If so then setting whole file sparse
3205                  * ie potentially making a few extra pages at the beginning
3206                  * or end of the file non-sparse via set_sparse is harmless.
3207                  */
3208                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3209                         rc = -EOPNOTSUPP;
3210                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3211                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3212                         free_xid(xid);
3213                         return rc;
3214                 }
3215
3216                 smb2_set_sparse(xid, tcon, cfile, inode, false);
3217                 rc = 0;
3218         } else {
3219                 smb2_set_sparse(xid, tcon, cfile, inode, false);
3220                 rc = 0;
3221                 if (i_size_read(inode) < off + len) {
3222                         eof = cpu_to_le64(off + len);
3223                         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3224                                           cfile->fid.volatile_fid, cfile->pid,
3225                                           &eof);
3226                 }
3227         }
3228
3229         if (rc)
3230                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3231                                 tcon->ses->Suid, off, len, rc);
3232         else
3233                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3234                                 tcon->ses->Suid, off, len);
3235
3236         free_xid(xid);
3237         return rc;
3238 }
3239
3240 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3241 {
3242         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3243         struct cifsInodeInfo *cifsi;
3244         struct inode *inode;
3245         int rc = 0;
3246         struct file_allocated_range_buffer in_data, *out_data = NULL;
3247         u32 out_data_len;
3248         unsigned int xid;
3249
3250         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3251                 return generic_file_llseek(file, offset, whence);
3252
3253         inode = d_inode(cfile->dentry);
3254         cifsi = CIFS_I(inode);
3255
3256         if (offset < 0 || offset >= i_size_read(inode))
3257                 return -ENXIO;
3258
3259         xid = get_xid();
3260         /*
3261          * We need to be sure that all dirty pages are written as they
3262          * might fill holes on the server.
3263          * Note that we also MUST flush any written pages since at least
3264          * some servers (Windows2016) will not reflect recent writes in
3265          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3266          */
3267         wrcfile = find_writable_file(cifsi, false);
3268         if (wrcfile) {
3269                 filemap_write_and_wait(inode->i_mapping);
3270                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3271                 cifsFileInfo_put(wrcfile);
3272         }
3273
3274         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3275                 if (whence == SEEK_HOLE)
3276                         offset = i_size_read(inode);
3277                 goto lseek_exit;
3278         }
3279
3280         in_data.file_offset = cpu_to_le64(offset);
3281         in_data.length = cpu_to_le64(i_size_read(inode));
3282
3283         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3284                         cfile->fid.volatile_fid,
3285                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3286                         (char *)&in_data, sizeof(in_data),
3287                         sizeof(struct file_allocated_range_buffer),
3288                         (char **)&out_data, &out_data_len);
3289         if (rc == -E2BIG)
3290                 rc = 0;
3291         if (rc)
3292                 goto lseek_exit;
3293
3294         if (whence == SEEK_HOLE && out_data_len == 0)
3295                 goto lseek_exit;
3296
3297         if (whence == SEEK_DATA && out_data_len == 0) {
3298                 rc = -ENXIO;
3299                 goto lseek_exit;
3300         }
3301
3302         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3303                 rc = -EINVAL;
3304                 goto lseek_exit;
3305         }
3306         if (whence == SEEK_DATA) {
3307                 offset = le64_to_cpu(out_data->file_offset);
3308                 goto lseek_exit;
3309         }
3310         if (offset < le64_to_cpu(out_data->file_offset))
3311                 goto lseek_exit;
3312
3313         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3314
3315  lseek_exit:
3316         free_xid(xid);
3317         kfree(out_data);
3318         if (!rc)
3319                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3320         else
3321                 return rc;
3322 }
3323
3324 static int smb3_fiemap(struct cifs_tcon *tcon,
3325                        struct cifsFileInfo *cfile,
3326                        struct fiemap_extent_info *fei, u64 start, u64 len)
3327 {
3328         unsigned int xid;
3329         struct file_allocated_range_buffer in_data, *out_data;
3330         u32 out_data_len;
3331         int i, num, rc, flags, last_blob;
3332         u64 next;
3333
3334         if (fiemap_check_flags(fei, FIEMAP_FLAG_SYNC))
3335                 return -EBADR;
3336
3337         xid = get_xid();
3338  again:
3339         in_data.file_offset = cpu_to_le64(start);
3340         in_data.length = cpu_to_le64(len);
3341
3342         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3343                         cfile->fid.volatile_fid,
3344                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3345                         (char *)&in_data, sizeof(in_data),
3346                         1024 * sizeof(struct file_allocated_range_buffer),
3347                         (char **)&out_data, &out_data_len);
3348         if (rc == -E2BIG) {
3349                 last_blob = 0;
3350                 rc = 0;
3351         } else
3352                 last_blob = 1;
3353         if (rc)
3354                 goto out;
3355
3356         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3357                 rc = -EINVAL;
3358                 goto out;
3359         }
3360         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3361                 rc = -EINVAL;
3362                 goto out;
3363         }
3364
3365         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3366         for (i = 0; i < num; i++) {
3367                 flags = 0;
3368                 if (i == num - 1 && last_blob)
3369                         flags |= FIEMAP_EXTENT_LAST;
3370
3371                 rc = fiemap_fill_next_extent(fei,
3372                                 le64_to_cpu(out_data[i].file_offset),
3373                                 le64_to_cpu(out_data[i].file_offset),
3374                                 le64_to_cpu(out_data[i].length),
3375                                 flags);
3376                 if (rc < 0)
3377                         goto out;
3378                 if (rc == 1) {
3379                         rc = 0;
3380                         goto out;
3381                 }
3382         }
3383
3384         if (!last_blob) {
3385                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3386                   le64_to_cpu(out_data[num - 1].length);
3387                 len = len - (next - start);
3388                 start = next;
3389                 goto again;
3390         }
3391
3392  out:
3393         free_xid(xid);
3394         kfree(out_data);
3395         return rc;
3396 }
3397
3398 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3399                            loff_t off, loff_t len)
3400 {
3401         /* KEEP_SIZE already checked for by do_fallocate */
3402         if (mode & FALLOC_FL_PUNCH_HOLE)
3403                 return smb3_punch_hole(file, tcon, off, len);
3404         else if (mode & FALLOC_FL_ZERO_RANGE) {
3405                 if (mode & FALLOC_FL_KEEP_SIZE)
3406                         return smb3_zero_range(file, tcon, off, len, true);
3407                 return smb3_zero_range(file, tcon, off, len, false);
3408         } else if (mode == FALLOC_FL_KEEP_SIZE)
3409                 return smb3_simple_falloc(file, tcon, off, len, true);
3410         else if (mode == 0)
3411                 return smb3_simple_falloc(file, tcon, off, len, false);
3412
3413         return -EOPNOTSUPP;
3414 }
3415
3416 static void
3417 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3418                       struct cifsInodeInfo *cinode, __u32 oplock,
3419                       unsigned int epoch, bool *purge_cache)
3420 {
3421         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3422 }
3423
3424 static void
3425 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3426                        unsigned int epoch, bool *purge_cache);
3427
3428 static void
3429 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3430                        struct cifsInodeInfo *cinode, __u32 oplock,
3431                        unsigned int epoch, bool *purge_cache)
3432 {
3433         unsigned int old_state = cinode->oplock;
3434         unsigned int old_epoch = cinode->epoch;
3435         unsigned int new_state;
3436
3437         if (epoch > old_epoch) {
3438                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3439                 cinode->epoch = epoch;
3440         }
3441
3442         new_state = cinode->oplock;
3443         *purge_cache = false;
3444
3445         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3446             (new_state & CIFS_CACHE_READ_FLG) == 0)
3447                 *purge_cache = true;
3448         else if (old_state == new_state && (epoch - old_epoch > 1))
3449                 *purge_cache = true;
3450 }
3451
3452 static void
3453 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3454                       unsigned int epoch, bool *purge_cache)
3455 {
3456         oplock &= 0xFF;
3457         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3458                 return;
3459         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3460                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3461                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3462                          &cinode->vfs_inode);
3463         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3464                 cinode->oplock = CIFS_CACHE_RW_FLG;
3465                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3466                          &cinode->vfs_inode);
3467         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3468                 cinode->oplock = CIFS_CACHE_READ_FLG;
3469                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3470                          &cinode->vfs_inode);
3471         } else
3472                 cinode->oplock = 0;
3473 }
3474
3475 static void
3476 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3477                        unsigned int epoch, bool *purge_cache)
3478 {
3479         char message[5] = {0};
3480         unsigned int new_oplock = 0;
3481
3482         oplock &= 0xFF;
3483         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3484                 return;
3485
3486         /* Check if the server granted an oplock rather than a lease */
3487         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3488                 return smb2_set_oplock_level(cinode, oplock, epoch,
3489                                              purge_cache);
3490
3491         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3492                 new_oplock |= CIFS_CACHE_READ_FLG;
3493                 strcat(message, "R");
3494         }
3495         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3496                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3497                 strcat(message, "H");
3498         }
3499         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3500                 new_oplock |= CIFS_CACHE_WRITE_FLG;
3501                 strcat(message, "W");
3502         }
3503         if (!new_oplock)
3504                 strncpy(message, "None", sizeof(message));
3505
3506         cinode->oplock = new_oplock;
3507         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3508                  &cinode->vfs_inode);
3509 }
3510
3511 static void
3512 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3513                       unsigned int epoch, bool *purge_cache)
3514 {
3515         unsigned int old_oplock = cinode->oplock;
3516
3517         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3518
3519         if (purge_cache) {
3520                 *purge_cache = false;
3521                 if (old_oplock == CIFS_CACHE_READ_FLG) {
3522                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3523                             (epoch - cinode->epoch > 0))
3524                                 *purge_cache = true;
3525                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3526                                  (epoch - cinode->epoch > 1))
3527                                 *purge_cache = true;
3528                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3529                                  (epoch - cinode->epoch > 1))
3530                                 *purge_cache = true;
3531                         else if (cinode->oplock == 0 &&
3532                                  (epoch - cinode->epoch > 0))
3533                                 *purge_cache = true;
3534                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3535                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3536                             (epoch - cinode->epoch > 0))
3537                                 *purge_cache = true;
3538                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3539                                  (epoch - cinode->epoch > 1))
3540                                 *purge_cache = true;
3541                 }
3542                 cinode->epoch = epoch;
3543         }
3544 }
3545
3546 static bool
3547 smb2_is_read_op(__u32 oplock)
3548 {
3549         return oplock == SMB2_OPLOCK_LEVEL_II;
3550 }
3551
3552 static bool
3553 smb21_is_read_op(__u32 oplock)
3554 {
3555         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
3556                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
3557 }
3558
3559 static __le32
3560 map_oplock_to_lease(u8 oplock)
3561 {
3562         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3563                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
3564         else if (oplock == SMB2_OPLOCK_LEVEL_II)
3565                 return SMB2_LEASE_READ_CACHING;
3566         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
3567                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
3568                        SMB2_LEASE_WRITE_CACHING;
3569         return 0;
3570 }
3571
3572 static char *
3573 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
3574 {
3575         struct create_lease *buf;
3576
3577         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
3578         if (!buf)
3579                 return NULL;
3580
3581         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3582         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3583
3584         buf->ccontext.DataOffset = cpu_to_le16(offsetof
3585                                         (struct create_lease, lcontext));
3586         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
3587         buf->ccontext.NameOffset = cpu_to_le16(offsetof
3588                                 (struct create_lease, Name));
3589         buf->ccontext.NameLength = cpu_to_le16(4);
3590         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3591         buf->Name[0] = 'R';
3592         buf->Name[1] = 'q';
3593         buf->Name[2] = 'L';
3594         buf->Name[3] = 's';
3595         return (char *)buf;
3596 }
3597
3598 static char *
3599 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
3600 {
3601         struct create_lease_v2 *buf;
3602
3603         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
3604         if (!buf)
3605                 return NULL;
3606
3607         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3608         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3609
3610         buf->ccontext.DataOffset = cpu_to_le16(offsetof
3611                                         (struct create_lease_v2, lcontext));
3612         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
3613         buf->ccontext.NameOffset = cpu_to_le16(offsetof
3614                                 (struct create_lease_v2, Name));
3615         buf->ccontext.NameLength = cpu_to_le16(4);
3616         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3617         buf->Name[0] = 'R';
3618         buf->Name[1] = 'q';
3619         buf->Name[2] = 'L';
3620         buf->Name[3] = 's';
3621         return (char *)buf;
3622 }
3623
3624 static __u8
3625 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3626 {
3627         struct create_lease *lc = (struct create_lease *)buf;
3628
3629         *epoch = 0; /* not used */
3630         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3631                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3632         return le32_to_cpu(lc->lcontext.LeaseState);
3633 }
3634
3635 static __u8
3636 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3637 {
3638         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
3639
3640         *epoch = le16_to_cpu(lc->lcontext.Epoch);
3641         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3642                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3643         if (lease_key)
3644                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
3645         return le32_to_cpu(lc->lcontext.LeaseState);
3646 }
3647
3648 static unsigned int
3649 smb2_wp_retry_size(struct inode *inode)
3650 {
3651         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
3652                      SMB2_MAX_BUFFER_SIZE);
3653 }
3654
3655 static bool
3656 smb2_dir_needs_close(struct cifsFileInfo *cfile)
3657 {
3658         return !cfile->invalidHandle;
3659 }
3660
3661 static void
3662 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
3663                    struct smb_rqst *old_rq, __le16 cipher_type)
3664 {
3665         struct smb2_sync_hdr *shdr =
3666                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
3667
3668         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
3669         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
3670         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
3671         tr_hdr->Flags = cpu_to_le16(0x01);
3672         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3673                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3674         else
3675                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3676         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
3677 }
3678
3679 /* We can not use the normal sg_set_buf() as we will sometimes pass a
3680  * stack object as buf.
3681  */
3682 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
3683                                    unsigned int buflen)
3684 {
3685         void *addr;
3686         /*
3687          * VMAP_STACK (at least) puts stack into the vmalloc address space
3688          */
3689         if (is_vmalloc_addr(buf))
3690                 addr = vmalloc_to_page(buf);
3691         else
3692                 addr = virt_to_page(buf);
3693         sg_set_page(sg, addr, buflen, offset_in_page(buf));
3694 }
3695
3696 /* Assumes the first rqst has a transform header as the first iov.
3697  * I.e.
3698  * rqst[0].rq_iov[0]  is transform header
3699  * rqst[0].rq_iov[1+] data to be encrypted/decrypted
3700  * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
3701  */
3702 static struct scatterlist *
3703 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
3704 {
3705         unsigned int sg_len;
3706         struct scatterlist *sg;
3707         unsigned int i;
3708         unsigned int j;
3709         unsigned int idx = 0;
3710         int skip;
3711
3712         sg_len = 1;
3713         for (i = 0; i < num_rqst; i++)
3714                 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
3715
3716         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
3717         if (!sg)
3718                 return NULL;
3719
3720         sg_init_table(sg, sg_len);
3721         for (i = 0; i < num_rqst; i++) {
3722                 for (j = 0; j < rqst[i].rq_nvec; j++) {
3723                         /*
3724                          * The first rqst has a transform header where the
3725                          * first 20 bytes are not part of the encrypted blob
3726                          */
3727                         skip = (i == 0) && (j == 0) ? 20 : 0;
3728                         smb2_sg_set_buf(&sg[idx++],
3729                                         rqst[i].rq_iov[j].iov_base + skip,
3730                                         rqst[i].rq_iov[j].iov_len - skip);
3731                         }
3732
3733                 for (j = 0; j < rqst[i].rq_npages; j++) {
3734                         unsigned int len, offset;
3735
3736                         rqst_page_get_length(&rqst[i], j, &len, &offset);
3737                         sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
3738                 }
3739         }
3740         smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
3741         return sg;
3742 }
3743
3744 static int
3745 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
3746 {
3747         struct cifs_ses *ses;
3748         u8 *ses_enc_key;
3749
3750         spin_lock(&cifs_tcp_ses_lock);
3751         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
3752                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3753                         if (ses->Suid == ses_id) {
3754                                 ses_enc_key = enc ? ses->smb3encryptionkey :
3755                                         ses->smb3decryptionkey;
3756                                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
3757                                 spin_unlock(&cifs_tcp_ses_lock);
3758                                 return 0;
3759                         }
3760                 }
3761         }
3762         spin_unlock(&cifs_tcp_ses_lock);
3763
3764         return 1;
3765 }
3766 /*
3767  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
3768  * iov[0]   - transform header (associate data),
3769  * iov[1-N] - SMB2 header and pages - data to encrypt.
3770  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
3771  * untouched.
3772  */
3773 static int
3774 crypt_message(struct TCP_Server_Info *server, int num_rqst,
3775               struct smb_rqst *rqst, int enc)
3776 {
3777         struct smb2_transform_hdr *tr_hdr =
3778                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
3779         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
3780         int rc = 0;
3781         struct scatterlist *sg;
3782         u8 sign[SMB2_SIGNATURE_SIZE] = {};
3783         u8 key[SMB3_SIGN_KEY_SIZE];
3784         struct aead_request *req;
3785         char *iv;
3786         unsigned int iv_len;
3787         DECLARE_CRYPTO_WAIT(wait);
3788         struct crypto_aead *tfm;
3789         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3790
3791         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
3792         if (rc) {
3793                 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
3794                          enc ? "en" : "de");
3795                 return 0;
3796         }
3797
3798         rc = smb3_crypto_aead_allocate(server);
3799         if (rc) {
3800                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
3801                 return rc;
3802         }
3803
3804         tfm = enc ? server->secmech.ccmaesencrypt :
3805                                                 server->secmech.ccmaesdecrypt;
3806         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
3807         if (rc) {
3808                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
3809                 return rc;
3810         }
3811
3812         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
3813         if (rc) {
3814                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
3815                 return rc;
3816         }
3817
3818         req = aead_request_alloc(tfm, GFP_KERNEL);
3819         if (!req) {
3820                 cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
3821                 return -ENOMEM;
3822         }
3823
3824         if (!enc) {
3825                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
3826                 crypt_len += SMB2_SIGNATURE_SIZE;
3827         }
3828
3829         sg = init_sg(num_rqst, rqst, sign);
3830         if (!sg) {
3831                 cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
3832                 rc = -ENOMEM;
3833                 goto free_req;
3834         }
3835
3836         iv_len = crypto_aead_ivsize(tfm);
3837         iv = kzalloc(iv_len, GFP_KERNEL);
3838         if (!iv) {
3839                 cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
3840                 rc = -ENOMEM;
3841                 goto free_sg;
3842         }
3843
3844         if (server->cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3845                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3846         else {
3847                 iv[0] = 3;
3848                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3849         }
3850
3851         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
3852         aead_request_set_ad(req, assoc_data_len);
3853
3854         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
3855                                   crypto_req_done, &wait);
3856
3857         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
3858                                 : crypto_aead_decrypt(req), &wait);
3859
3860         if (!rc && enc)
3861                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
3862
3863         kfree(iv);
3864 free_sg:
3865         kfree(sg);
3866 free_req:
3867         kfree(req);
3868         return rc;
3869 }
3870
3871 void
3872 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
3873 {
3874         int i, j;
3875
3876         for (i = 0; i < num_rqst; i++) {
3877                 if (rqst[i].rq_pages) {
3878                         for (j = rqst[i].rq_npages - 1; j >= 0; j--)
3879                                 put_page(rqst[i].rq_pages[j]);
3880                         kfree(rqst[i].rq_pages);
3881                 }
3882         }
3883 }
3884
3885 /*
3886  * This function will initialize new_rq and encrypt the content.
3887  * The first entry, new_rq[0], only contains a single iov which contains
3888  * a smb2_transform_hdr and is pre-allocated by the caller.
3889  * This function then populates new_rq[1+] with the content from olq_rq[0+].
3890  *
3891  * The end result is an array of smb_rqst structures where the first structure
3892  * only contains a single iov for the transform header which we then can pass
3893  * to crypt_message().
3894  *
3895  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
3896  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
3897  */
3898 static int
3899 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
3900                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
3901 {
3902         struct page **pages;
3903         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
3904         unsigned int npages;
3905         unsigned int orig_len = 0;
3906         int i, j;
3907         int rc = -ENOMEM;
3908
3909         for (i = 1; i < num_rqst; i++) {
3910                 npages = old_rq[i - 1].rq_npages;
3911                 pages = kmalloc_array(npages, sizeof(struct page *),
3912                                       GFP_KERNEL);
3913                 if (!pages)
3914                         goto err_free;
3915
3916                 new_rq[i].rq_pages = pages;
3917                 new_rq[i].rq_npages = npages;
3918                 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
3919                 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
3920                 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
3921                 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
3922                 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
3923
3924                 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
3925
3926                 for (j = 0; j < npages; j++) {
3927                         pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3928                         if (!pages[j])
3929                                 goto err_free;
3930                 }
3931
3932                 /* copy pages form the old */
3933                 for (j = 0; j < npages; j++) {
3934                         char *dst, *src;
3935                         unsigned int offset, len;
3936
3937                         rqst_page_get_length(&new_rq[i], j, &len, &offset);
3938
3939                         dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
3940                         src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
3941
3942                         memcpy(dst, src, len);
3943                         kunmap(new_rq[i].rq_pages[j]);
3944                         kunmap(old_rq[i - 1].rq_pages[j]);
3945                 }
3946         }
3947
3948         /* fill the 1st iov with a transform header */
3949         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
3950
3951         rc = crypt_message(server, num_rqst, new_rq, 1);
3952         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
3953         if (rc)
3954                 goto err_free;
3955
3956         return rc;
3957
3958 err_free:
3959         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
3960         return rc;
3961 }
3962
3963 static int
3964 smb3_is_transform_hdr(void *buf)
3965 {
3966         struct smb2_transform_hdr *trhdr = buf;
3967
3968         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
3969 }
3970
3971 static int
3972 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
3973                  unsigned int buf_data_size, struct page **pages,
3974                  unsigned int npages, unsigned int page_data_size)
3975 {
3976         struct kvec iov[2];
3977         struct smb_rqst rqst = {NULL};
3978         int rc;
3979
3980         iov[0].iov_base = buf;
3981         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
3982         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
3983         iov[1].iov_len = buf_data_size;
3984
3985         rqst.rq_iov = iov;
3986         rqst.rq_nvec = 2;
3987         rqst.rq_pages = pages;
3988         rqst.rq_npages = npages;
3989         rqst.rq_pagesz = PAGE_SIZE;
3990         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
3991
3992         rc = crypt_message(server, 1, &rqst, 0);
3993         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
3994
3995         if (rc)
3996                 return rc;
3997
3998         memmove(buf, iov[1].iov_base, buf_data_size);
3999
4000         server->total_read = buf_data_size + page_data_size;
4001
4002         return rc;
4003 }
4004
4005 static int
4006 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4007                      unsigned int npages, unsigned int len)
4008 {
4009         int i;
4010         int length;
4011
4012         for (i = 0; i < npages; i++) {
4013                 struct page *page = pages[i];
4014                 size_t n;
4015
4016                 n = len;
4017                 if (len >= PAGE_SIZE) {
4018                         /* enough data to fill the page */
4019                         n = PAGE_SIZE;
4020                         len -= n;
4021                 } else {
4022                         zero_user(page, len, PAGE_SIZE - len);
4023                         len = 0;
4024                 }
4025                 length = cifs_read_page_from_socket(server, page, 0, n);
4026                 if (length < 0)
4027                         return length;
4028                 server->total_read += length;
4029         }
4030
4031         return 0;
4032 }
4033
4034 static int
4035 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4036                unsigned int cur_off, struct bio_vec **page_vec)
4037 {
4038         struct bio_vec *bvec;
4039         int i;
4040
4041         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4042         if (!bvec)
4043                 return -ENOMEM;
4044
4045         for (i = 0; i < npages; i++) {
4046                 bvec[i].bv_page = pages[i];
4047                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4048                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4049                 data_size -= bvec[i].bv_len;
4050         }
4051
4052         if (data_size != 0) {
4053                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4054                 kfree(bvec);
4055                 return -EIO;
4056         }
4057
4058         *page_vec = bvec;
4059         return 0;
4060 }
4061
4062 static int
4063 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4064                  char *buf, unsigned int buf_len, struct page **pages,
4065                  unsigned int npages, unsigned int page_data_size)
4066 {
4067         unsigned int data_offset;
4068         unsigned int data_len;
4069         unsigned int cur_off;
4070         unsigned int cur_page_idx;
4071         unsigned int pad_len;
4072         struct cifs_readdata *rdata = mid->callback_data;
4073         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4074         struct bio_vec *bvec = NULL;
4075         struct iov_iter iter;
4076         struct kvec iov;
4077         int length;
4078         bool use_rdma_mr = false;
4079
4080         if (shdr->Command != SMB2_READ) {
4081                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4082                 return -ENOTSUPP;
4083         }
4084
4085         if (server->ops->is_session_expired &&
4086             server->ops->is_session_expired(buf)) {
4087                 cifs_reconnect(server);
4088                 wake_up(&server->response_q);
4089                 return -1;
4090         }
4091
4092         if (server->ops->is_status_pending &&
4093                         server->ops->is_status_pending(buf, server))
4094                 return -1;
4095
4096         /* set up first two iov to get credits */
4097         rdata->iov[0].iov_base = buf;
4098         rdata->iov[0].iov_len = 0;
4099         rdata->iov[1].iov_base = buf;
4100         rdata->iov[1].iov_len =
4101                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4102         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4103                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4104         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4105                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4106
4107         rdata->result = server->ops->map_error(buf, true);
4108         if (rdata->result != 0) {
4109                 cifs_dbg(FYI, "%s: server returned error %d\n",
4110                          __func__, rdata->result);
4111                 /* normal error on read response */
4112                 dequeue_mid(mid, false);
4113                 return 0;
4114         }
4115
4116         data_offset = server->ops->read_data_offset(buf);
4117 #ifdef CONFIG_CIFS_SMB_DIRECT
4118         use_rdma_mr = rdata->mr;
4119 #endif
4120         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4121
4122         if (data_offset < server->vals->read_rsp_size) {
4123                 /*
4124                  * win2k8 sometimes sends an offset of 0 when the read
4125                  * is beyond the EOF. Treat it as if the data starts just after
4126                  * the header.
4127                  */
4128                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4129                          __func__, data_offset);
4130                 data_offset = server->vals->read_rsp_size;
4131         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4132                 /* data_offset is beyond the end of smallbuf */
4133                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4134                          __func__, data_offset);
4135                 rdata->result = -EIO;
4136                 dequeue_mid(mid, rdata->result);
4137                 return 0;
4138         }
4139
4140         pad_len = data_offset - server->vals->read_rsp_size;
4141
4142         if (buf_len <= data_offset) {
4143                 /* read response payload is in pages */
4144                 cur_page_idx = pad_len / PAGE_SIZE;
4145                 cur_off = pad_len % PAGE_SIZE;
4146
4147                 if (cur_page_idx != 0) {
4148                         /* data offset is beyond the 1st page of response */
4149                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4150                                  __func__, data_offset);
4151                         rdata->result = -EIO;
4152                         dequeue_mid(mid, rdata->result);
4153                         return 0;
4154                 }
4155
4156                 if (data_len > page_data_size - pad_len) {
4157                         /* data_len is corrupt -- discard frame */
4158                         rdata->result = -EIO;
4159                         dequeue_mid(mid, rdata->result);
4160                         return 0;
4161                 }
4162
4163                 rdata->result = init_read_bvec(pages, npages, page_data_size,
4164                                                cur_off, &bvec);
4165                 if (rdata->result != 0) {
4166                         dequeue_mid(mid, rdata->result);
4167                         return 0;
4168                 }
4169
4170                 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4171         } else if (buf_len >= data_offset + data_len) {
4172                 /* read response payload is in buf */
4173                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4174                 iov.iov_base = buf + data_offset;
4175                 iov.iov_len = data_len;
4176                 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4177         } else {
4178                 /* read response payload cannot be in both buf and pages */
4179                 WARN_ONCE(1, "buf can not contain only a part of read data");
4180                 rdata->result = -EIO;
4181                 dequeue_mid(mid, rdata->result);
4182                 return 0;
4183         }
4184
4185         length = rdata->copy_into_pages(server, rdata, &iter);
4186
4187         kfree(bvec);
4188
4189         if (length < 0)
4190                 return length;
4191
4192         dequeue_mid(mid, false);
4193         return length;
4194 }
4195
4196 struct smb2_decrypt_work {
4197         struct work_struct decrypt;
4198         struct TCP_Server_Info *server;
4199         struct page **ppages;
4200         char *buf;
4201         unsigned int npages;
4202         unsigned int len;
4203 };
4204
4205
4206 static void smb2_decrypt_offload(struct work_struct *work)
4207 {
4208         struct smb2_decrypt_work *dw = container_of(work,
4209                                 struct smb2_decrypt_work, decrypt);
4210         int i, rc;
4211         struct mid_q_entry *mid;
4212
4213         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4214                               dw->ppages, dw->npages, dw->len);
4215         if (rc) {
4216                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4217                 goto free_pages;
4218         }
4219
4220         dw->server->lstrp = jiffies;
4221         mid = smb2_find_mid(dw->server, dw->buf);
4222         if (mid == NULL)
4223                 cifs_dbg(FYI, "mid not found\n");
4224         else {
4225                 mid->decrypted = true;
4226                 rc = handle_read_data(dw->server, mid, dw->buf,
4227                                       dw->server->vals->read_rsp_size,
4228                                       dw->ppages, dw->npages, dw->len);
4229                 mid->callback(mid);
4230                 cifs_mid_q_entry_release(mid);
4231         }
4232
4233 free_pages:
4234         for (i = dw->npages-1; i >= 0; i--)
4235                 put_page(dw->ppages[i]);
4236
4237         kfree(dw->ppages);
4238         cifs_small_buf_release(dw->buf);
4239         kfree(dw);
4240 }
4241
4242
4243 static int
4244 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4245                        int *num_mids)
4246 {
4247         char *buf = server->smallbuf;
4248         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4249         unsigned int npages;
4250         struct page **pages;
4251         unsigned int len;
4252         unsigned int buflen = server->pdu_size;
4253         int rc;
4254         int i = 0;
4255         struct smb2_decrypt_work *dw;
4256
4257         *num_mids = 1;
4258         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4259                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4260
4261         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4262         if (rc < 0)
4263                 return rc;
4264         server->total_read += rc;
4265
4266         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4267                 server->vals->read_rsp_size;
4268         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4269
4270         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4271         if (!pages) {
4272                 rc = -ENOMEM;
4273                 goto discard_data;
4274         }
4275
4276         for (; i < npages; i++) {
4277                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4278                 if (!pages[i]) {
4279                         rc = -ENOMEM;
4280                         goto discard_data;
4281                 }
4282         }
4283
4284         /* read read data into pages */
4285         rc = read_data_into_pages(server, pages, npages, len);
4286         if (rc)
4287                 goto free_pages;
4288
4289         rc = cifs_discard_remaining_data(server);
4290         if (rc)
4291                 goto free_pages;
4292
4293         /*
4294          * For large reads, offload to different thread for better performance,
4295          * use more cores decrypting which can be expensive
4296          */
4297
4298         if ((server->min_offload) && (server->in_flight > 1) &&
4299             (server->pdu_size >= server->min_offload)) {
4300                 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4301                 if (dw == NULL)
4302                         goto non_offloaded_decrypt;
4303
4304                 dw->buf = server->smallbuf;
4305                 server->smallbuf = (char *)cifs_small_buf_get();
4306
4307                 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4308
4309                 dw->npages = npages;
4310                 dw->server = server;
4311                 dw->ppages = pages;
4312                 dw->len = len;
4313                 queue_work(decrypt_wq, &dw->decrypt);
4314                 *num_mids = 0; /* worker thread takes care of finding mid */
4315                 return -1;
4316         }
4317
4318 non_offloaded_decrypt:
4319         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4320                               pages, npages, len);
4321         if (rc)
4322                 goto free_pages;
4323
4324         *mid = smb2_find_mid(server, buf);
4325         if (*mid == NULL)
4326                 cifs_dbg(FYI, "mid not found\n");
4327         else {
4328                 cifs_dbg(FYI, "mid found\n");
4329                 (*mid)->decrypted = true;
4330                 rc = handle_read_data(server, *mid, buf,
4331                                       server->vals->read_rsp_size,
4332                                       pages, npages, len);
4333         }
4334
4335 free_pages:
4336         for (i = i - 1; i >= 0; i--)
4337                 put_page(pages[i]);
4338         kfree(pages);
4339         return rc;
4340 discard_data:
4341         cifs_discard_remaining_data(server);
4342         goto free_pages;
4343 }
4344
4345 static int
4346 receive_encrypted_standard(struct TCP_Server_Info *server,
4347                            struct mid_q_entry **mids, char **bufs,
4348                            int *num_mids)
4349 {
4350         int ret, length;
4351         char *buf = server->smallbuf;
4352         struct smb2_sync_hdr *shdr;
4353         unsigned int pdu_length = server->pdu_size;
4354         unsigned int buf_size;
4355         struct mid_q_entry *mid_entry;
4356         int next_is_large;
4357         char *next_buffer = NULL;
4358
4359         *num_mids = 0;
4360
4361         /* switch to large buffer if too big for a small one */
4362         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4363                 server->large_buf = true;
4364                 memcpy(server->bigbuf, buf, server->total_read);
4365                 buf = server->bigbuf;
4366         }
4367
4368         /* now read the rest */
4369         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4370                                 pdu_length - HEADER_SIZE(server) + 1);
4371         if (length < 0)
4372                 return length;
4373         server->total_read += length;
4374
4375         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4376         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
4377         if (length)
4378                 return length;
4379
4380         next_is_large = server->large_buf;
4381 one_more:
4382         shdr = (struct smb2_sync_hdr *)buf;
4383         if (shdr->NextCommand) {
4384                 if (next_is_large)
4385                         next_buffer = (char *)cifs_buf_get();
4386                 else
4387                         next_buffer = (char *)cifs_small_buf_get();
4388                 memcpy(next_buffer,
4389                        buf + le32_to_cpu(shdr->NextCommand),
4390                        pdu_length - le32_to_cpu(shdr->NextCommand));
4391         }
4392
4393         mid_entry = smb2_find_mid(server, buf);
4394         if (mid_entry == NULL)
4395                 cifs_dbg(FYI, "mid not found\n");
4396         else {
4397                 cifs_dbg(FYI, "mid found\n");
4398                 mid_entry->decrypted = true;
4399                 mid_entry->resp_buf_size = server->pdu_size;
4400         }
4401
4402         if (*num_mids >= MAX_COMPOUND) {
4403                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4404                 return -1;
4405         }
4406         bufs[*num_mids] = buf;
4407         mids[(*num_mids)++] = mid_entry;
4408
4409         if (mid_entry && mid_entry->handle)
4410                 ret = mid_entry->handle(server, mid_entry);
4411         else
4412                 ret = cifs_handle_standard(server, mid_entry);
4413
4414         if (ret == 0 && shdr->NextCommand) {
4415                 pdu_length -= le32_to_cpu(shdr->NextCommand);
4416                 server->large_buf = next_is_large;
4417                 if (next_is_large)
4418                         server->bigbuf = buf = next_buffer;
4419                 else
4420                         server->smallbuf = buf = next_buffer;
4421                 goto one_more;
4422         } else if (ret != 0) {
4423                 /*
4424                  * ret != 0 here means that we didn't get to handle_mid() thus
4425                  * server->smallbuf and server->bigbuf are still valid. We need
4426                  * to free next_buffer because it is not going to be used
4427                  * anywhere.
4428                  */
4429                 if (next_is_large)
4430                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4431                 else
4432                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4433         }
4434
4435         return ret;
4436 }
4437
4438 static int
4439 smb3_receive_transform(struct TCP_Server_Info *server,
4440                        struct mid_q_entry **mids, char **bufs, int *num_mids)
4441 {
4442         char *buf = server->smallbuf;
4443         unsigned int pdu_length = server->pdu_size;
4444         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4445         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4446
4447         if (pdu_length < sizeof(struct smb2_transform_hdr) +
4448                                                 sizeof(struct smb2_sync_hdr)) {
4449                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4450                          pdu_length);
4451                 cifs_reconnect(server);
4452                 wake_up(&server->response_q);
4453                 return -ECONNABORTED;
4454         }
4455
4456         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4457                 cifs_server_dbg(VFS, "Transform message is broken\n");
4458                 cifs_reconnect(server);
4459                 wake_up(&server->response_q);
4460                 return -ECONNABORTED;
4461         }
4462
4463         /* TODO: add support for compounds containing READ. */
4464         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4465                 return receive_encrypted_read(server, &mids[0], num_mids);
4466         }
4467
4468         return receive_encrypted_standard(server, mids, bufs, num_mids);
4469 }
4470
4471 int
4472 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4473 {
4474         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4475
4476         return handle_read_data(server, mid, buf, server->pdu_size,
4477                                 NULL, 0, 0);
4478 }
4479
4480 static int
4481 smb2_next_header(char *buf)
4482 {
4483         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
4484         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4485
4486         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
4487                 return sizeof(struct smb2_transform_hdr) +
4488                   le32_to_cpu(t_hdr->OriginalMessageSize);
4489
4490         return le32_to_cpu(hdr->NextCommand);
4491 }
4492
4493 static int
4494 smb2_make_node(unsigned int xid, struct inode *inode,
4495                struct dentry *dentry, struct cifs_tcon *tcon,
4496                char *full_path, umode_t mode, dev_t dev)
4497 {
4498         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
4499         int rc = -EPERM;
4500         int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL;
4501         FILE_ALL_INFO *buf = NULL;
4502         struct cifs_io_parms io_parms;
4503         __u32 oplock = 0;
4504         struct cifs_fid fid;
4505         struct cifs_open_parms oparms;
4506         unsigned int bytes_written;
4507         struct win_dev *pdev;
4508         struct kvec iov[2];
4509
4510         /*
4511          * Check if mounted with mount parm 'sfu' mount parm.
4512          * SFU emulation should work with all servers, but only
4513          * supports block and char device (no socket & fifo),
4514          * and was used by default in earlier versions of Windows
4515          */
4516         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
4517                 goto out;
4518
4519         /*
4520          * TODO: Add ability to create instead via reparse point. Windows (e.g.
4521          * their current NFS server) uses this approach to expose special files
4522          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
4523          */
4524
4525         if (!S_ISCHR(mode) && !S_ISBLK(mode))
4526                 goto out;
4527
4528         cifs_dbg(FYI, "sfu compat create special file\n");
4529
4530         buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
4531         if (buf == NULL) {
4532                 rc = -ENOMEM;
4533                 goto out;
4534         }
4535
4536         if (backup_cred(cifs_sb))
4537                 create_options |= CREATE_OPEN_BACKUP_INTENT;
4538
4539         oparms.tcon = tcon;
4540         oparms.cifs_sb = cifs_sb;
4541         oparms.desired_access = GENERIC_WRITE;
4542         oparms.create_options = create_options;
4543         oparms.disposition = FILE_CREATE;
4544         oparms.path = full_path;
4545         oparms.fid = &fid;
4546         oparms.reconnect = false;
4547
4548         if (tcon->ses->server->oplocks)
4549                 oplock = REQ_OPLOCK;
4550         else
4551                 oplock = 0;
4552         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
4553         if (rc)
4554                 goto out;
4555
4556         /*
4557          * BB Do not bother to decode buf since no local inode yet to put
4558          * timestamps in, but we can reuse it safely.
4559          */
4560
4561         pdev = (struct win_dev *)buf;
4562         io_parms.pid = current->tgid;
4563         io_parms.tcon = tcon;
4564         io_parms.offset = 0;
4565         io_parms.length = sizeof(struct win_dev);
4566         iov[1].iov_base = buf;
4567         iov[1].iov_len = sizeof(struct win_dev);
4568         if (S_ISCHR(mode)) {
4569                 memcpy(pdev->type, "IntxCHR", 8);
4570                 pdev->major = cpu_to_le64(MAJOR(dev));
4571                 pdev->minor = cpu_to_le64(MINOR(dev));
4572                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4573                                                         &bytes_written, iov, 1);
4574         } else if (S_ISBLK(mode)) {
4575                 memcpy(pdev->type, "IntxBLK", 8);
4576                 pdev->major = cpu_to_le64(MAJOR(dev));
4577                 pdev->minor = cpu_to_le64(MINOR(dev));
4578                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4579                                                         &bytes_written, iov, 1);
4580         }
4581         tcon->ses->server->ops->close(xid, tcon, &fid);
4582         d_drop(dentry);
4583
4584         /* FIXME: add code here to set EAs */
4585 out:
4586         kfree(buf);
4587         return rc;
4588 }
4589
4590
4591 struct smb_version_operations smb20_operations = {
4592         .compare_fids = smb2_compare_fids,
4593         .setup_request = smb2_setup_request,
4594         .setup_async_request = smb2_setup_async_request,
4595         .check_receive = smb2_check_receive,
4596         .add_credits = smb2_add_credits,
4597         .set_credits = smb2_set_credits,
4598         .get_credits_field = smb2_get_credits_field,
4599         .get_credits = smb2_get_credits,
4600         .wait_mtu_credits = cifs_wait_mtu_credits,
4601         .get_next_mid = smb2_get_next_mid,
4602         .revert_current_mid = smb2_revert_current_mid,
4603         .read_data_offset = smb2_read_data_offset,
4604         .read_data_length = smb2_read_data_length,
4605         .map_error = map_smb2_to_linux_error,
4606         .find_mid = smb2_find_mid,
4607         .check_message = smb2_check_message,
4608         .dump_detail = smb2_dump_detail,
4609         .clear_stats = smb2_clear_stats,
4610         .print_stats = smb2_print_stats,
4611         .is_oplock_break = smb2_is_valid_oplock_break,
4612         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4613         .downgrade_oplock = smb2_downgrade_oplock,
4614         .need_neg = smb2_need_neg,
4615         .negotiate = smb2_negotiate,
4616         .negotiate_wsize = smb2_negotiate_wsize,
4617         .negotiate_rsize = smb2_negotiate_rsize,
4618         .sess_setup = SMB2_sess_setup,
4619         .logoff = SMB2_logoff,
4620         .tree_connect = SMB2_tcon,
4621         .tree_disconnect = SMB2_tdis,
4622         .qfs_tcon = smb2_qfs_tcon,
4623         .is_path_accessible = smb2_is_path_accessible,
4624         .can_echo = smb2_can_echo,
4625         .echo = SMB2_echo,
4626         .query_path_info = smb2_query_path_info,
4627         .get_srv_inum = smb2_get_srv_inum,
4628         .query_file_info = smb2_query_file_info,
4629         .set_path_size = smb2_set_path_size,
4630         .set_file_size = smb2_set_file_size,
4631         .set_file_info = smb2_set_file_info,
4632         .set_compression = smb2_set_compression,
4633         .mkdir = smb2_mkdir,
4634         .mkdir_setinfo = smb2_mkdir_setinfo,
4635         .rmdir = smb2_rmdir,
4636         .unlink = smb2_unlink,
4637         .rename = smb2_rename_path,
4638         .create_hardlink = smb2_create_hardlink,
4639         .query_symlink = smb2_query_symlink,
4640         .query_mf_symlink = smb3_query_mf_symlink,
4641         .create_mf_symlink = smb3_create_mf_symlink,
4642         .open = smb2_open_file,
4643         .set_fid = smb2_set_fid,
4644         .close = smb2_close_file,
4645         .flush = smb2_flush_file,
4646         .async_readv = smb2_async_readv,
4647         .async_writev = smb2_async_writev,
4648         .sync_read = smb2_sync_read,
4649         .sync_write = smb2_sync_write,
4650         .query_dir_first = smb2_query_dir_first,
4651         .query_dir_next = smb2_query_dir_next,
4652         .close_dir = smb2_close_dir,
4653         .calc_smb_size = smb2_calc_size,
4654         .is_status_pending = smb2_is_status_pending,
4655         .is_session_expired = smb2_is_session_expired,
4656         .oplock_response = smb2_oplock_response,
4657         .queryfs = smb2_queryfs,
4658         .mand_lock = smb2_mand_lock,
4659         .mand_unlock_range = smb2_unlock_range,
4660         .push_mand_locks = smb2_push_mandatory_locks,
4661         .get_lease_key = smb2_get_lease_key,
4662         .set_lease_key = smb2_set_lease_key,
4663         .new_lease_key = smb2_new_lease_key,
4664         .calc_signature = smb2_calc_signature,
4665         .is_read_op = smb2_is_read_op,
4666         .set_oplock_level = smb2_set_oplock_level,
4667         .create_lease_buf = smb2_create_lease_buf,
4668         .parse_lease_buf = smb2_parse_lease_buf,
4669         .copychunk_range = smb2_copychunk_range,
4670         .wp_retry_size = smb2_wp_retry_size,
4671         .dir_needs_close = smb2_dir_needs_close,
4672         .get_dfs_refer = smb2_get_dfs_refer,
4673         .select_sectype = smb2_select_sectype,
4674 #ifdef CONFIG_CIFS_XATTR
4675         .query_all_EAs = smb2_query_eas,
4676         .set_EA = smb2_set_ea,
4677 #endif /* CIFS_XATTR */
4678         .get_acl = get_smb2_acl,
4679         .get_acl_by_fid = get_smb2_acl_by_fid,
4680         .set_acl = set_smb2_acl,
4681         .next_header = smb2_next_header,
4682         .ioctl_query_info = smb2_ioctl_query_info,
4683         .make_node = smb2_make_node,
4684         .fiemap = smb3_fiemap,
4685         .llseek = smb3_llseek,
4686 };
4687
4688 struct smb_version_operations smb21_operations = {
4689         .compare_fids = smb2_compare_fids,
4690         .setup_request = smb2_setup_request,
4691         .setup_async_request = smb2_setup_async_request,
4692         .check_receive = smb2_check_receive,
4693         .add_credits = smb2_add_credits,
4694         .set_credits = smb2_set_credits,
4695         .get_credits_field = smb2_get_credits_field,
4696         .get_credits = smb2_get_credits,
4697         .wait_mtu_credits = smb2_wait_mtu_credits,
4698         .adjust_credits = smb2_adjust_credits,
4699         .get_next_mid = smb2_get_next_mid,
4700         .revert_current_mid = smb2_revert_current_mid,
4701         .read_data_offset = smb2_read_data_offset,
4702         .read_data_length = smb2_read_data_length,
4703         .map_error = map_smb2_to_linux_error,
4704         .find_mid = smb2_find_mid,
4705         .check_message = smb2_check_message,
4706         .dump_detail = smb2_dump_detail,
4707         .clear_stats = smb2_clear_stats,
4708         .print_stats = smb2_print_stats,
4709         .is_oplock_break = smb2_is_valid_oplock_break,
4710         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4711         .downgrade_oplock = smb2_downgrade_oplock,
4712         .need_neg = smb2_need_neg,
4713         .negotiate = smb2_negotiate,
4714         .negotiate_wsize = smb2_negotiate_wsize,
4715         .negotiate_rsize = smb2_negotiate_rsize,
4716         .sess_setup = SMB2_sess_setup,
4717         .logoff = SMB2_logoff,
4718         .tree_connect = SMB2_tcon,
4719         .tree_disconnect = SMB2_tdis,
4720         .qfs_tcon = smb2_qfs_tcon,
4721         .is_path_accessible = smb2_is_path_accessible,
4722         .can_echo = smb2_can_echo,
4723         .echo = SMB2_echo,
4724         .query_path_info = smb2_query_path_info,
4725         .get_srv_inum = smb2_get_srv_inum,
4726         .query_file_info = smb2_query_file_info,
4727         .set_path_size = smb2_set_path_size,
4728         .set_file_size = smb2_set_file_size,
4729         .set_file_info = smb2_set_file_info,
4730         .set_compression = smb2_set_compression,
4731         .mkdir = smb2_mkdir,
4732         .mkdir_setinfo = smb2_mkdir_setinfo,
4733         .rmdir = smb2_rmdir,
4734         .unlink = smb2_unlink,
4735         .rename = smb2_rename_path,
4736         .create_hardlink = smb2_create_hardlink,
4737         .query_symlink = smb2_query_symlink,
4738         .query_mf_symlink = smb3_query_mf_symlink,
4739         .create_mf_symlink = smb3_create_mf_symlink,
4740         .open = smb2_open_file,
4741         .set_fid = smb2_set_fid,
4742         .close = smb2_close_file,
4743         .flush = smb2_flush_file,
4744         .async_readv = smb2_async_readv,
4745         .async_writev = smb2_async_writev,
4746         .sync_read = smb2_sync_read,
4747         .sync_write = smb2_sync_write,
4748         .query_dir_first = smb2_query_dir_first,
4749         .query_dir_next = smb2_query_dir_next,
4750         .close_dir = smb2_close_dir,
4751         .calc_smb_size = smb2_calc_size,
4752         .is_status_pending = smb2_is_status_pending,
4753         .is_session_expired = smb2_is_session_expired,
4754         .oplock_response = smb2_oplock_response,
4755         .queryfs = smb2_queryfs,
4756         .mand_lock = smb2_mand_lock,
4757         .mand_unlock_range = smb2_unlock_range,
4758         .push_mand_locks = smb2_push_mandatory_locks,
4759         .get_lease_key = smb2_get_lease_key,
4760         .set_lease_key = smb2_set_lease_key,
4761         .new_lease_key = smb2_new_lease_key,
4762         .calc_signature = smb2_calc_signature,
4763         .is_read_op = smb21_is_read_op,
4764         .set_oplock_level = smb21_set_oplock_level,
4765         .create_lease_buf = smb2_create_lease_buf,
4766         .parse_lease_buf = smb2_parse_lease_buf,
4767         .copychunk_range = smb2_copychunk_range,
4768         .wp_retry_size = smb2_wp_retry_size,
4769         .dir_needs_close = smb2_dir_needs_close,
4770         .enum_snapshots = smb3_enum_snapshots,
4771         .get_dfs_refer = smb2_get_dfs_refer,
4772         .select_sectype = smb2_select_sectype,
4773 #ifdef CONFIG_CIFS_XATTR
4774         .query_all_EAs = smb2_query_eas,
4775         .set_EA = smb2_set_ea,
4776 #endif /* CIFS_XATTR */
4777         .get_acl = get_smb2_acl,
4778         .get_acl_by_fid = get_smb2_acl_by_fid,
4779         .set_acl = set_smb2_acl,
4780         .next_header = smb2_next_header,
4781         .ioctl_query_info = smb2_ioctl_query_info,
4782         .make_node = smb2_make_node,
4783         .fiemap = smb3_fiemap,
4784         .llseek = smb3_llseek,
4785 };
4786
4787 struct smb_version_operations smb30_operations = {
4788         .compare_fids = smb2_compare_fids,
4789         .setup_request = smb2_setup_request,
4790         .setup_async_request = smb2_setup_async_request,
4791         .check_receive = smb2_check_receive,
4792         .add_credits = smb2_add_credits,
4793         .set_credits = smb2_set_credits,
4794         .get_credits_field = smb2_get_credits_field,
4795         .get_credits = smb2_get_credits,
4796         .wait_mtu_credits = smb2_wait_mtu_credits,
4797         .adjust_credits = smb2_adjust_credits,
4798         .get_next_mid = smb2_get_next_mid,
4799         .revert_current_mid = smb2_revert_current_mid,
4800         .read_data_offset = smb2_read_data_offset,
4801         .read_data_length = smb2_read_data_length,
4802         .map_error = map_smb2_to_linux_error,
4803         .find_mid = smb2_find_mid,
4804         .check_message = smb2_check_message,
4805         .dump_detail = smb2_dump_detail,
4806         .clear_stats = smb2_clear_stats,
4807         .print_stats = smb2_print_stats,
4808         .dump_share_caps = smb2_dump_share_caps,
4809         .is_oplock_break = smb2_is_valid_oplock_break,
4810         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4811         .downgrade_oplock = smb3_downgrade_oplock,
4812         .need_neg = smb2_need_neg,
4813         .negotiate = smb2_negotiate,
4814         .negotiate_wsize = smb3_negotiate_wsize,
4815         .negotiate_rsize = smb3_negotiate_rsize,
4816         .sess_setup = SMB2_sess_setup,
4817         .logoff = SMB2_logoff,
4818         .tree_connect = SMB2_tcon,
4819         .tree_disconnect = SMB2_tdis,
4820         .qfs_tcon = smb3_qfs_tcon,
4821         .is_path_accessible = smb2_is_path_accessible,
4822         .can_echo = smb2_can_echo,
4823         .echo = SMB2_echo,
4824         .query_path_info = smb2_query_path_info,
4825         .get_srv_inum = smb2_get_srv_inum,
4826         .query_file_info = smb2_query_file_info,
4827         .set_path_size = smb2_set_path_size,
4828         .set_file_size = smb2_set_file_size,
4829         .set_file_info = smb2_set_file_info,
4830         .set_compression = smb2_set_compression,
4831         .mkdir = smb2_mkdir,
4832         .mkdir_setinfo = smb2_mkdir_setinfo,
4833         .rmdir = smb2_rmdir,
4834         .unlink = smb2_unlink,
4835         .rename = smb2_rename_path,
4836         .create_hardlink = smb2_create_hardlink,
4837         .query_symlink = smb2_query_symlink,
4838         .query_mf_symlink = smb3_query_mf_symlink,
4839         .create_mf_symlink = smb3_create_mf_symlink,
4840         .open = smb2_open_file,
4841         .set_fid = smb2_set_fid,
4842         .close = smb2_close_file,
4843         .close_getattr = smb2_close_getattr,
4844         .flush = smb2_flush_file,
4845         .async_readv = smb2_async_readv,
4846         .async_writev = smb2_async_writev,
4847         .sync_read = smb2_sync_read,
4848         .sync_write = smb2_sync_write,
4849         .query_dir_first = smb2_query_dir_first,
4850         .query_dir_next = smb2_query_dir_next,
4851         .close_dir = smb2_close_dir,
4852         .calc_smb_size = smb2_calc_size,
4853         .is_status_pending = smb2_is_status_pending,
4854         .is_session_expired = smb2_is_session_expired,
4855         .oplock_response = smb2_oplock_response,
4856         .queryfs = smb2_queryfs,
4857         .mand_lock = smb2_mand_lock,
4858         .mand_unlock_range = smb2_unlock_range,
4859         .push_mand_locks = smb2_push_mandatory_locks,
4860         .get_lease_key = smb2_get_lease_key,
4861         .set_lease_key = smb2_set_lease_key,
4862         .new_lease_key = smb2_new_lease_key,
4863         .generate_signingkey = generate_smb30signingkey,
4864         .calc_signature = smb3_calc_signature,
4865         .set_integrity  = smb3_set_integrity,
4866         .is_read_op = smb21_is_read_op,
4867         .set_oplock_level = smb3_set_oplock_level,
4868         .create_lease_buf = smb3_create_lease_buf,
4869         .parse_lease_buf = smb3_parse_lease_buf,
4870         .copychunk_range = smb2_copychunk_range,
4871         .duplicate_extents = smb2_duplicate_extents,
4872         .validate_negotiate = smb3_validate_negotiate,
4873         .wp_retry_size = smb2_wp_retry_size,
4874         .dir_needs_close = smb2_dir_needs_close,
4875         .fallocate = smb3_fallocate,
4876         .enum_snapshots = smb3_enum_snapshots,
4877         .init_transform_rq = smb3_init_transform_rq,
4878         .is_transform_hdr = smb3_is_transform_hdr,
4879         .receive_transform = smb3_receive_transform,
4880         .get_dfs_refer = smb2_get_dfs_refer,
4881         .select_sectype = smb2_select_sectype,
4882 #ifdef CONFIG_CIFS_XATTR
4883         .query_all_EAs = smb2_query_eas,
4884         .set_EA = smb2_set_ea,
4885 #endif /* CIFS_XATTR */
4886         .get_acl = get_smb2_acl,
4887         .get_acl_by_fid = get_smb2_acl_by_fid,
4888         .set_acl = set_smb2_acl,
4889         .next_header = smb2_next_header,
4890         .ioctl_query_info = smb2_ioctl_query_info,
4891         .make_node = smb2_make_node,
4892         .fiemap = smb3_fiemap,
4893         .llseek = smb3_llseek,
4894 };
4895
4896 struct smb_version_operations smb311_operations = {
4897         .compare_fids = smb2_compare_fids,
4898         .setup_request = smb2_setup_request,
4899         .setup_async_request = smb2_setup_async_request,
4900         .check_receive = smb2_check_receive,
4901         .add_credits = smb2_add_credits,
4902         .set_credits = smb2_set_credits,
4903         .get_credits_field = smb2_get_credits_field,
4904         .get_credits = smb2_get_credits,
4905         .wait_mtu_credits = smb2_wait_mtu_credits,
4906         .adjust_credits = smb2_adjust_credits,
4907         .get_next_mid = smb2_get_next_mid,
4908         .revert_current_mid = smb2_revert_current_mid,
4909         .read_data_offset = smb2_read_data_offset,
4910         .read_data_length = smb2_read_data_length,
4911         .map_error = map_smb2_to_linux_error,
4912         .find_mid = smb2_find_mid,
4913         .check_message = smb2_check_message,
4914         .dump_detail = smb2_dump_detail,
4915         .clear_stats = smb2_clear_stats,
4916         .print_stats = smb2_print_stats,
4917         .dump_share_caps = smb2_dump_share_caps,
4918         .is_oplock_break = smb2_is_valid_oplock_break,
4919         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4920         .downgrade_oplock = smb3_downgrade_oplock,
4921         .need_neg = smb2_need_neg,
4922         .negotiate = smb2_negotiate,
4923         .negotiate_wsize = smb3_negotiate_wsize,
4924         .negotiate_rsize = smb3_negotiate_rsize,
4925         .sess_setup = SMB2_sess_setup,
4926         .logoff = SMB2_logoff,
4927         .tree_connect = SMB2_tcon,
4928         .tree_disconnect = SMB2_tdis,
4929         .qfs_tcon = smb3_qfs_tcon,
4930         .is_path_accessible = smb2_is_path_accessible,
4931         .can_echo = smb2_can_echo,
4932         .echo = SMB2_echo,
4933         .query_path_info = smb2_query_path_info,
4934         .get_srv_inum = smb2_get_srv_inum,
4935         .query_file_info = smb2_query_file_info,
4936         .set_path_size = smb2_set_path_size,
4937         .set_file_size = smb2_set_file_size,
4938         .set_file_info = smb2_set_file_info,
4939         .set_compression = smb2_set_compression,
4940         .mkdir = smb2_mkdir,
4941         .mkdir_setinfo = smb2_mkdir_setinfo,
4942         .posix_mkdir = smb311_posix_mkdir,
4943         .rmdir = smb2_rmdir,
4944         .unlink = smb2_unlink,
4945         .rename = smb2_rename_path,
4946         .create_hardlink = smb2_create_hardlink,
4947         .query_symlink = smb2_query_symlink,
4948         .query_mf_symlink = smb3_query_mf_symlink,
4949         .create_mf_symlink = smb3_create_mf_symlink,
4950         .open = smb2_open_file,
4951         .set_fid = smb2_set_fid,
4952         .close = smb2_close_file,
4953         .close_getattr = smb2_close_getattr,
4954         .flush = smb2_flush_file,
4955         .async_readv = smb2_async_readv,
4956         .async_writev = smb2_async_writev,
4957         .sync_read = smb2_sync_read,
4958         .sync_write = smb2_sync_write,
4959         .query_dir_first = smb2_query_dir_first,
4960         .query_dir_next = smb2_query_dir_next,
4961         .close_dir = smb2_close_dir,
4962         .calc_smb_size = smb2_calc_size,
4963         .is_status_pending = smb2_is_status_pending,
4964         .is_session_expired = smb2_is_session_expired,
4965         .oplock_response = smb2_oplock_response,
4966         .queryfs = smb311_queryfs,
4967         .mand_lock = smb2_mand_lock,
4968         .mand_unlock_range = smb2_unlock_range,
4969         .push_mand_locks = smb2_push_mandatory_locks,
4970         .get_lease_key = smb2_get_lease_key,
4971         .set_lease_key = smb2_set_lease_key,
4972         .new_lease_key = smb2_new_lease_key,
4973         .generate_signingkey = generate_smb311signingkey,
4974         .calc_signature = smb3_calc_signature,
4975         .set_integrity  = smb3_set_integrity,
4976         .is_read_op = smb21_is_read_op,
4977         .set_oplock_level = smb3_set_oplock_level,
4978         .create_lease_buf = smb3_create_lease_buf,
4979         .parse_lease_buf = smb3_parse_lease_buf,
4980         .copychunk_range = smb2_copychunk_range,
4981         .duplicate_extents = smb2_duplicate_extents,
4982 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
4983         .wp_retry_size = smb2_wp_retry_size,
4984         .dir_needs_close = smb2_dir_needs_close,
4985         .fallocate = smb3_fallocate,
4986         .enum_snapshots = smb3_enum_snapshots,
4987         .init_transform_rq = smb3_init_transform_rq,
4988         .is_transform_hdr = smb3_is_transform_hdr,
4989         .receive_transform = smb3_receive_transform,
4990         .get_dfs_refer = smb2_get_dfs_refer,
4991         .select_sectype = smb2_select_sectype,
4992 #ifdef CONFIG_CIFS_XATTR
4993         .query_all_EAs = smb2_query_eas,
4994         .set_EA = smb2_set_ea,
4995 #endif /* CIFS_XATTR */
4996         .get_acl = get_smb2_acl,
4997         .get_acl_by_fid = get_smb2_acl_by_fid,
4998         .set_acl = set_smb2_acl,
4999         .next_header = smb2_next_header,
5000         .ioctl_query_info = smb2_ioctl_query_info,
5001         .make_node = smb2_make_node,
5002         .fiemap = smb3_fiemap,
5003         .llseek = smb3_llseek,
5004 };
5005
5006 struct smb_version_values smb20_values = {
5007         .version_string = SMB20_VERSION_STRING,
5008         .protocol_id = SMB20_PROT_ID,
5009         .req_capabilities = 0, /* MBZ */
5010         .large_lock_type = 0,
5011         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5012         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5013         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5014         .header_size = sizeof(struct smb2_sync_hdr),
5015         .header_preamble_size = 0,
5016         .max_header_size = MAX_SMB2_HDR_SIZE,
5017         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5018         .lock_cmd = SMB2_LOCK,
5019         .cap_unix = 0,
5020         .cap_nt_find = SMB2_NT_FIND,
5021         .cap_large_files = SMB2_LARGE_FILES,
5022         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5023         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5024         .create_lease_size = sizeof(struct create_lease),
5025 };
5026
5027 struct smb_version_values smb21_values = {
5028         .version_string = SMB21_VERSION_STRING,
5029         .protocol_id = SMB21_PROT_ID,
5030         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5031         .large_lock_type = 0,
5032         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5033         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5034         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5035         .header_size = sizeof(struct smb2_sync_hdr),
5036         .header_preamble_size = 0,
5037         .max_header_size = MAX_SMB2_HDR_SIZE,
5038         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5039         .lock_cmd = SMB2_LOCK,
5040         .cap_unix = 0,
5041         .cap_nt_find = SMB2_NT_FIND,
5042         .cap_large_files = SMB2_LARGE_FILES,
5043         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5044         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5045         .create_lease_size = sizeof(struct create_lease),
5046 };
5047
5048 struct smb_version_values smb3any_values = {
5049         .version_string = SMB3ANY_VERSION_STRING,
5050         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5051         .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,
5052         .large_lock_type = 0,
5053         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5054         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5055         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5056         .header_size = sizeof(struct smb2_sync_hdr),
5057         .header_preamble_size = 0,
5058         .max_header_size = MAX_SMB2_HDR_SIZE,
5059         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5060         .lock_cmd = SMB2_LOCK,
5061         .cap_unix = 0,
5062         .cap_nt_find = SMB2_NT_FIND,
5063         .cap_large_files = SMB2_LARGE_FILES,
5064         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5065         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5066         .create_lease_size = sizeof(struct create_lease_v2),
5067 };
5068
5069 struct smb_version_values smbdefault_values = {
5070         .version_string = SMBDEFAULT_VERSION_STRING,
5071         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5072         .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,
5073         .large_lock_type = 0,
5074         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5075         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5076         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5077         .header_size = sizeof(struct smb2_sync_hdr),
5078         .header_preamble_size = 0,
5079         .max_header_size = MAX_SMB2_HDR_SIZE,
5080         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5081         .lock_cmd = SMB2_LOCK,
5082         .cap_unix = 0,
5083         .cap_nt_find = SMB2_NT_FIND,
5084         .cap_large_files = SMB2_LARGE_FILES,
5085         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5086         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5087         .create_lease_size = sizeof(struct create_lease_v2),
5088 };
5089
5090 struct smb_version_values smb30_values = {
5091         .version_string = SMB30_VERSION_STRING,
5092         .protocol_id = SMB30_PROT_ID,
5093         .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,
5094         .large_lock_type = 0,
5095         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5096         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5097         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5098         .header_size = sizeof(struct smb2_sync_hdr),
5099         .header_preamble_size = 0,
5100         .max_header_size = MAX_SMB2_HDR_SIZE,
5101         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5102         .lock_cmd = SMB2_LOCK,
5103         .cap_unix = 0,
5104         .cap_nt_find = SMB2_NT_FIND,
5105         .cap_large_files = SMB2_LARGE_FILES,
5106         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5107         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5108         .create_lease_size = sizeof(struct create_lease_v2),
5109 };
5110
5111 struct smb_version_values smb302_values = {
5112         .version_string = SMB302_VERSION_STRING,
5113         .protocol_id = SMB302_PROT_ID,
5114         .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,
5115         .large_lock_type = 0,
5116         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5117         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5118         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5119         .header_size = sizeof(struct smb2_sync_hdr),
5120         .header_preamble_size = 0,
5121         .max_header_size = MAX_SMB2_HDR_SIZE,
5122         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5123         .lock_cmd = SMB2_LOCK,
5124         .cap_unix = 0,
5125         .cap_nt_find = SMB2_NT_FIND,
5126         .cap_large_files = SMB2_LARGE_FILES,
5127         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5128         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5129         .create_lease_size = sizeof(struct create_lease_v2),
5130 };
5131
5132 struct smb_version_values smb311_values = {
5133         .version_string = SMB311_VERSION_STRING,
5134         .protocol_id = SMB311_PROT_ID,
5135         .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,
5136         .large_lock_type = 0,
5137         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5138         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5139         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5140         .header_size = sizeof(struct smb2_sync_hdr),
5141         .header_preamble_size = 0,
5142         .max_header_size = MAX_SMB2_HDR_SIZE,
5143         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5144         .lock_cmd = SMB2_LOCK,
5145         .cap_unix = 0,
5146         .cap_nt_find = SMB2_NT_FIND,
5147         .cap_large_files = SMB2_LARGE_FILES,
5148         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5149         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5150         .create_lease_size = sizeof(struct create_lease_v2),
5151 };