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                 }
1528         } else if (qi.flags == PASSTHRU_SET_INFO) {
1529                 /* Can eventually relax perm check since server enforces too */
1530                 if (!capable(CAP_SYS_ADMIN))
1531                         rc = -EPERM;
1532                 else  {
1533                         memset(&si_iov, 0, sizeof(si_iov));
1534                         rqst[1].rq_iov = si_iov;
1535                         rqst[1].rq_nvec = 1;
1536
1537                         size[0] = 8;
1538                         data[0] = buffer;
1539
1540                         rc = SMB2_set_info_init(tcon, &rqst[1],
1541                                         COMPOUND_FID, COMPOUND_FID,
1542                                         current->tgid,
1543                                         FILE_END_OF_FILE_INFORMATION,
1544                                         SMB2_O_INFO_FILE, 0, data, size);
1545                 }
1546         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1547                 memset(&qi_iov, 0, sizeof(qi_iov));
1548                 rqst[1].rq_iov = qi_iov;
1549                 rqst[1].rq_nvec = 1;
1550
1551                 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
1552                                   COMPOUND_FID, qi.file_info_class,
1553                                   qi.info_type, qi.additional_information,
1554                                   qi.input_buffer_length,
1555                                   qi.output_buffer_length, buffer);
1556         } else { /* unknown flags */
1557                 cifs_tcon_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags);
1558                 rc = -EINVAL;
1559         }
1560
1561         if (rc)
1562                 goto iqinf_exit;
1563         smb2_set_next_command(tcon, &rqst[1]);
1564         smb2_set_related(&rqst[1]);
1565
1566         /* Close */
1567         memset(&close_iov, 0, sizeof(close_iov));
1568         rqst[2].rq_iov = close_iov;
1569         rqst[2].rq_nvec = 1;
1570
1571         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1572         if (rc)
1573                 goto iqinf_exit;
1574         smb2_set_related(&rqst[2]);
1575
1576         rc = compound_send_recv(xid, ses, flags, 3, rqst,
1577                                 resp_buftype, rsp_iov);
1578         if (rc)
1579                 goto iqinf_exit;
1580
1581         /* No need to bump num_remote_opens since handle immediately closed */
1582         if (qi.flags & PASSTHRU_FSCTL) {
1583                 pqi = (struct smb_query_info __user *)arg;
1584                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1585                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1586                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1587                 if (qi.input_buffer_length > 0 &&
1588                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1589                     > rsp_iov[1].iov_len)
1590                         goto e_fault;
1591
1592                 if (copy_to_user(&pqi->input_buffer_length,
1593                                  &qi.input_buffer_length,
1594                                  sizeof(qi.input_buffer_length)))
1595                         goto e_fault;
1596
1597                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1598                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1599                                  qi.input_buffer_length))
1600                         goto e_fault;
1601         } else {
1602                 pqi = (struct smb_query_info __user *)arg;
1603                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1604                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1605                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1606                 if (copy_to_user(&pqi->input_buffer_length,
1607                                  &qi.input_buffer_length,
1608                                  sizeof(qi.input_buffer_length)))
1609                         goto e_fault;
1610
1611                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1612                                  qi.input_buffer_length))
1613                         goto e_fault;
1614         }
1615
1616  iqinf_exit:
1617         kfree(buffer);
1618         SMB2_open_free(&rqst[0]);
1619         if (qi.flags & PASSTHRU_FSCTL)
1620                 SMB2_ioctl_free(&rqst[1]);
1621         else
1622                 SMB2_query_info_free(&rqst[1]);
1623
1624         SMB2_close_free(&rqst[2]);
1625         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1626         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1627         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1628         return rc;
1629
1630 e_fault:
1631         rc = -EFAULT;
1632         goto iqinf_exit;
1633 }
1634
1635 static ssize_t
1636 smb2_copychunk_range(const unsigned int xid,
1637                         struct cifsFileInfo *srcfile,
1638                         struct cifsFileInfo *trgtfile, u64 src_off,
1639                         u64 len, u64 dest_off)
1640 {
1641         int rc;
1642         unsigned int ret_data_len;
1643         struct copychunk_ioctl *pcchunk;
1644         struct copychunk_ioctl_rsp *retbuf = NULL;
1645         struct cifs_tcon *tcon;
1646         int chunks_copied = 0;
1647         bool chunk_sizes_updated = false;
1648         ssize_t bytes_written, total_bytes_written = 0;
1649
1650         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1651
1652         if (pcchunk == NULL)
1653                 return -ENOMEM;
1654
1655         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1656         /* Request a key from the server to identify the source of the copy */
1657         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1658                                 srcfile->fid.persistent_fid,
1659                                 srcfile->fid.volatile_fid, pcchunk);
1660
1661         /* Note: request_res_key sets res_key null only if rc !=0 */
1662         if (rc)
1663                 goto cchunk_out;
1664
1665         /* For now array only one chunk long, will make more flexible later */
1666         pcchunk->ChunkCount = cpu_to_le32(1);
1667         pcchunk->Reserved = 0;
1668         pcchunk->Reserved2 = 0;
1669
1670         tcon = tlink_tcon(trgtfile->tlink);
1671
1672         while (len > 0) {
1673                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1674                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1675                 pcchunk->Length =
1676                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1677
1678                 /* Request server copy to target from src identified by key */
1679                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1680                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1681                         true /* is_fsctl */, (char *)pcchunk,
1682                         sizeof(struct copychunk_ioctl), CIFSMaxBufSize,
1683                         (char **)&retbuf, &ret_data_len);
1684                 if (rc == 0) {
1685                         if (ret_data_len !=
1686                                         sizeof(struct copychunk_ioctl_rsp)) {
1687                                 cifs_tcon_dbg(VFS, "invalid cchunk response size\n");
1688                                 rc = -EIO;
1689                                 goto cchunk_out;
1690                         }
1691                         if (retbuf->TotalBytesWritten == 0) {
1692                                 cifs_dbg(FYI, "no bytes copied\n");
1693                                 rc = -EIO;
1694                                 goto cchunk_out;
1695                         }
1696                         /*
1697                          * Check if server claimed to write more than we asked
1698                          */
1699                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1700                             le32_to_cpu(pcchunk->Length)) {
1701                                 cifs_tcon_dbg(VFS, "invalid copy chunk response\n");
1702                                 rc = -EIO;
1703                                 goto cchunk_out;
1704                         }
1705                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1706                                 cifs_tcon_dbg(VFS, "invalid num chunks written\n");
1707                                 rc = -EIO;
1708                                 goto cchunk_out;
1709                         }
1710                         chunks_copied++;
1711
1712                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1713                         src_off += bytes_written;
1714                         dest_off += bytes_written;
1715                         len -= bytes_written;
1716                         total_bytes_written += bytes_written;
1717
1718                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1719                                 le32_to_cpu(retbuf->ChunksWritten),
1720                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1721                                 bytes_written);
1722                 } else if (rc == -EINVAL) {
1723                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1724                                 goto cchunk_out;
1725
1726                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1727                                 le32_to_cpu(retbuf->ChunksWritten),
1728                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1729                                 le32_to_cpu(retbuf->TotalBytesWritten));
1730
1731                         /*
1732                          * Check if this is the first request using these sizes,
1733                          * (ie check if copy succeed once with original sizes
1734                          * and check if the server gave us different sizes after
1735                          * we already updated max sizes on previous request).
1736                          * if not then why is the server returning an error now
1737                          */
1738                         if ((chunks_copied != 0) || chunk_sizes_updated)
1739                                 goto cchunk_out;
1740
1741                         /* Check that server is not asking us to grow size */
1742                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1743                                         tcon->max_bytes_chunk)
1744                                 tcon->max_bytes_chunk =
1745                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1746                         else
1747                                 goto cchunk_out; /* server gave us bogus size */
1748
1749                         /* No need to change MaxChunks since already set to 1 */
1750                         chunk_sizes_updated = true;
1751                 } else
1752                         goto cchunk_out;
1753         }
1754
1755 cchunk_out:
1756         kfree(pcchunk);
1757         kfree(retbuf);
1758         if (rc)
1759                 return rc;
1760         else
1761                 return total_bytes_written;
1762 }
1763
1764 static int
1765 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1766                 struct cifs_fid *fid)
1767 {
1768         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1769 }
1770
1771 static unsigned int
1772 smb2_read_data_offset(char *buf)
1773 {
1774         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1775
1776         return rsp->DataOffset;
1777 }
1778
1779 static unsigned int
1780 smb2_read_data_length(char *buf, bool in_remaining)
1781 {
1782         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1783
1784         if (in_remaining)
1785                 return le32_to_cpu(rsp->DataRemaining);
1786
1787         return le32_to_cpu(rsp->DataLength);
1788 }
1789
1790
1791 static int
1792 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1793                struct cifs_io_parms *parms, unsigned int *bytes_read,
1794                char **buf, int *buf_type)
1795 {
1796         parms->persistent_fid = pfid->persistent_fid;
1797         parms->volatile_fid = pfid->volatile_fid;
1798         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1799 }
1800
1801 static int
1802 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1803                 struct cifs_io_parms *parms, unsigned int *written,
1804                 struct kvec *iov, unsigned long nr_segs)
1805 {
1806
1807         parms->persistent_fid = pfid->persistent_fid;
1808         parms->volatile_fid = pfid->volatile_fid;
1809         return SMB2_write(xid, parms, written, iov, nr_segs);
1810 }
1811
1812 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1813 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1814                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1815 {
1816         struct cifsInodeInfo *cifsi;
1817         int rc;
1818
1819         cifsi = CIFS_I(inode);
1820
1821         /* if file already sparse don't bother setting sparse again */
1822         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1823                 return true; /* already sparse */
1824
1825         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1826                 return true; /* already not sparse */
1827
1828         /*
1829          * Can't check for sparse support on share the usual way via the
1830          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1831          * since Samba server doesn't set the flag on the share, yet
1832          * supports the set sparse FSCTL and returns sparse correctly
1833          * in the file attributes. If we fail setting sparse though we
1834          * mark that server does not support sparse files for this share
1835          * to avoid repeatedly sending the unsupported fsctl to server
1836          * if the file is repeatedly extended.
1837          */
1838         if (tcon->broken_sparse_sup)
1839                 return false;
1840
1841         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1842                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1843                         true /* is_fctl */,
1844                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1845         if (rc) {
1846                 tcon->broken_sparse_sup = true;
1847                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1848                 return false;
1849         }
1850
1851         if (setsparse)
1852                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1853         else
1854                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1855
1856         return true;
1857 }
1858
1859 static int
1860 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1861                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1862 {
1863         __le64 eof = cpu_to_le64(size);
1864         struct inode *inode;
1865
1866         /*
1867          * If extending file more than one page make sparse. Many Linux fs
1868          * make files sparse by default when extending via ftruncate
1869          */
1870         inode = d_inode(cfile->dentry);
1871
1872         if (!set_alloc && (size > inode->i_size + 8192)) {
1873                 __u8 set_sparse = 1;
1874
1875                 /* whether set sparse succeeds or not, extend the file */
1876                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1877         }
1878
1879         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1880                             cfile->fid.volatile_fid, cfile->pid, &eof);
1881 }
1882
1883 static int
1884 smb2_duplicate_extents(const unsigned int xid,
1885                         struct cifsFileInfo *srcfile,
1886                         struct cifsFileInfo *trgtfile, u64 src_off,
1887                         u64 len, u64 dest_off)
1888 {
1889         int rc;
1890         unsigned int ret_data_len;
1891         struct duplicate_extents_to_file dup_ext_buf;
1892         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1893
1894         /* server fileays advertise duplicate extent support with this flag */
1895         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1896              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1897                 return -EOPNOTSUPP;
1898
1899         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1900         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1901         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1902         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1903         dup_ext_buf.ByteCount = cpu_to_le64(len);
1904         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1905                 src_off, dest_off, len);
1906
1907         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1908         if (rc)
1909                 goto duplicate_extents_out;
1910
1911         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1912                         trgtfile->fid.volatile_fid,
1913                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1914                         true /* is_fsctl */,
1915                         (char *)&dup_ext_buf,
1916                         sizeof(struct duplicate_extents_to_file),
1917                         CIFSMaxBufSize, NULL,
1918                         &ret_data_len);
1919
1920         if (ret_data_len > 0)
1921                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1922
1923 duplicate_extents_out:
1924         return rc;
1925 }
1926
1927 static int
1928 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1929                    struct cifsFileInfo *cfile)
1930 {
1931         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1932                             cfile->fid.volatile_fid);
1933 }
1934
1935 static int
1936 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1937                    struct cifsFileInfo *cfile)
1938 {
1939         struct fsctl_set_integrity_information_req integr_info;
1940         unsigned int ret_data_len;
1941
1942         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1943         integr_info.Flags = 0;
1944         integr_info.Reserved = 0;
1945
1946         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1947                         cfile->fid.volatile_fid,
1948                         FSCTL_SET_INTEGRITY_INFORMATION,
1949                         true /* is_fsctl */,
1950                         (char *)&integr_info,
1951                         sizeof(struct fsctl_set_integrity_information_req),
1952                         CIFSMaxBufSize, NULL,
1953                         &ret_data_len);
1954
1955 }
1956
1957 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1958 #define GMT_TOKEN_SIZE 50
1959
1960 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1961
1962 /*
1963  * Input buffer contains (empty) struct smb_snapshot array with size filled in
1964  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1965  */
1966 static int
1967 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1968                    struct cifsFileInfo *cfile, void __user *ioc_buf)
1969 {
1970         char *retbuf = NULL;
1971         unsigned int ret_data_len = 0;
1972         int rc;
1973         u32 max_response_size;
1974         struct smb_snapshot_array snapshot_in;
1975
1976         /*
1977          * On the first query to enumerate the list of snapshots available
1978          * for this volume the buffer begins with 0 (number of snapshots
1979          * which can be returned is zero since at that point we do not know
1980          * how big the buffer needs to be). On the second query,
1981          * it (ret_data_len) is set to number of snapshots so we can
1982          * know to set the maximum response size larger (see below).
1983          */
1984         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
1985                 return -EFAULT;
1986
1987         /*
1988          * Note that for snapshot queries that servers like Azure expect that
1989          * the first query be minimal size (and just used to get the number/size
1990          * of previous versions) so response size must be specified as EXACTLY
1991          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
1992          * of eight bytes.
1993          */
1994         if (ret_data_len == 0)
1995                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
1996         else
1997                 max_response_size = CIFSMaxBufSize;
1998
1999         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2000                         cfile->fid.volatile_fid,
2001                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2002                         true /* is_fsctl */,
2003                         NULL, 0 /* no input data */, max_response_size,
2004                         (char **)&retbuf,
2005                         &ret_data_len);
2006         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2007                         rc, ret_data_len);
2008         if (rc)
2009                 return rc;
2010
2011         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2012                 /* Fixup buffer */
2013                 if (copy_from_user(&snapshot_in, ioc_buf,
2014                     sizeof(struct smb_snapshot_array))) {
2015                         rc = -EFAULT;
2016                         kfree(retbuf);
2017                         return rc;
2018                 }
2019
2020                 /*
2021                  * Check for min size, ie not large enough to fit even one GMT
2022                  * token (snapshot).  On the first ioctl some users may pass in
2023                  * smaller size (or zero) to simply get the size of the array
2024                  * so the user space caller can allocate sufficient memory
2025                  * and retry the ioctl again with larger array size sufficient
2026                  * to hold all of the snapshot GMT tokens on the second try.
2027                  */
2028                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2029                         ret_data_len = sizeof(struct smb_snapshot_array);
2030
2031                 /*
2032                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2033                  * the snapshot array (of 50 byte GMT tokens) each
2034                  * representing an available previous version of the data
2035                  */
2036                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2037                                         sizeof(struct smb_snapshot_array)))
2038                         ret_data_len = snapshot_in.snapshot_array_size +
2039                                         sizeof(struct smb_snapshot_array);
2040
2041                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2042                         rc = -EFAULT;
2043         }
2044
2045         kfree(retbuf);
2046         return rc;
2047 }
2048
2049 static int
2050 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2051                      const char *path, struct cifs_sb_info *cifs_sb,
2052                      struct cifs_fid *fid, __u16 search_flags,
2053                      struct cifs_search_info *srch_inf)
2054 {
2055         __le16 *utf16_path;
2056         struct smb_rqst rqst[2];
2057         struct kvec rsp_iov[2];
2058         int resp_buftype[2];
2059         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2060         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2061         int rc, flags = 0;
2062         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2063         struct cifs_open_parms oparms;
2064         struct smb2_query_directory_rsp *qd_rsp = NULL;
2065         struct smb2_create_rsp *op_rsp = NULL;
2066
2067         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2068         if (!utf16_path)
2069                 return -ENOMEM;
2070
2071         if (smb3_encryption_required(tcon))
2072                 flags |= CIFS_TRANSFORM_REQ;
2073
2074         memset(rqst, 0, sizeof(rqst));
2075         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2076         memset(rsp_iov, 0, sizeof(rsp_iov));
2077
2078         /* Open */
2079         memset(&open_iov, 0, sizeof(open_iov));
2080         rqst[0].rq_iov = open_iov;
2081         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2082
2083         oparms.tcon = tcon;
2084         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2085         oparms.disposition = FILE_OPEN;
2086         if (backup_cred(cifs_sb))
2087                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2088         else
2089                 oparms.create_options = 0;
2090         oparms.fid = fid;
2091         oparms.reconnect = false;
2092
2093         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2094         if (rc)
2095                 goto qdf_free;
2096         smb2_set_next_command(tcon, &rqst[0]);
2097
2098         /* Query directory */
2099         srch_inf->entries_in_buffer = 0;
2100         srch_inf->index_of_last_entry = 2;
2101
2102         memset(&qd_iov, 0, sizeof(qd_iov));
2103         rqst[1].rq_iov = qd_iov;
2104         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2105
2106         rc = SMB2_query_directory_init(xid, tcon, &rqst[1],
2107                                        COMPOUND_FID, COMPOUND_FID,
2108                                        0, srch_inf->info_level);
2109         if (rc)
2110                 goto qdf_free;
2111
2112         smb2_set_related(&rqst[1]);
2113
2114         rc = compound_send_recv(xid, tcon->ses, flags, 2, rqst,
2115                                 resp_buftype, rsp_iov);
2116
2117         /* If the open failed there is nothing to do */
2118         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2119         if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
2120                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2121                 goto qdf_free;
2122         }
2123         fid->persistent_fid = op_rsp->PersistentFileId;
2124         fid->volatile_fid = op_rsp->VolatileFileId;
2125
2126         /* Anything else than ENODATA means a genuine error */
2127         if (rc && rc != -ENODATA) {
2128                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2129                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2130                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2131                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2132                 goto qdf_free;
2133         }
2134
2135         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2136         if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
2137                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2138                                           tcon->tid, tcon->ses->Suid, 0, 0);
2139                 srch_inf->endOfSearch = true;
2140                 rc = 0;
2141                 goto qdf_free;
2142         }
2143
2144         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2145                                         srch_inf);
2146         if (rc) {
2147                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2148                         tcon->ses->Suid, 0, 0, rc);
2149                 goto qdf_free;
2150         }
2151         resp_buftype[1] = CIFS_NO_BUFFER;
2152
2153         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2154                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2155
2156  qdf_free:
2157         kfree(utf16_path);
2158         SMB2_open_free(&rqst[0]);
2159         SMB2_query_directory_free(&rqst[1]);
2160         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2161         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2162         return rc;
2163 }
2164
2165 static int
2166 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2167                     struct cifs_fid *fid, __u16 search_flags,
2168                     struct cifs_search_info *srch_inf)
2169 {
2170         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2171                                     fid->volatile_fid, 0, srch_inf);
2172 }
2173
2174 static int
2175 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2176                struct cifs_fid *fid)
2177 {
2178         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2179 }
2180
2181 /*
2182  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2183  * the number of credits and return true. Otherwise - return false.
2184  */
2185 static bool
2186 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2187 {
2188         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2189
2190         if (shdr->Status != STATUS_PENDING)
2191                 return false;
2192
2193         if (shdr->CreditRequest) {
2194                 spin_lock(&server->req_lock);
2195                 server->credits += le16_to_cpu(shdr->CreditRequest);
2196                 spin_unlock(&server->req_lock);
2197                 wake_up(&server->request_q);
2198         }
2199
2200         return true;
2201 }
2202
2203 static bool
2204 smb2_is_session_expired(char *buf)
2205 {
2206         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2207
2208         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2209             shdr->Status != STATUS_USER_SESSION_DELETED)
2210                 return false;
2211
2212         trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2213                                le16_to_cpu(shdr->Command),
2214                                le64_to_cpu(shdr->MessageId));
2215         cifs_dbg(FYI, "Session expired or deleted\n");
2216
2217         return true;
2218 }
2219
2220 static int
2221 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2222                      struct cifsInodeInfo *cinode)
2223 {
2224         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2225                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2226                                         smb2_get_lease_state(cinode));
2227
2228         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2229                                  fid->volatile_fid,
2230                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2231 }
2232
2233 void
2234 smb2_set_related(struct smb_rqst *rqst)
2235 {
2236         struct smb2_sync_hdr *shdr;
2237
2238         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2239         if (shdr == NULL) {
2240                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2241                 return;
2242         }
2243         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2244 }
2245
2246 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2247
2248 void
2249 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2250 {
2251         struct smb2_sync_hdr *shdr;
2252         struct cifs_ses *ses = tcon->ses;
2253         struct TCP_Server_Info *server = ses->server;
2254         unsigned long len = smb_rqst_len(server, rqst);
2255         int i, num_padding;
2256
2257         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2258         if (shdr == NULL) {
2259                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2260                 return;
2261         }
2262
2263         /* SMB headers in a compound are 8 byte aligned. */
2264
2265         /* No padding needed */
2266         if (!(len & 7))
2267                 goto finished;
2268
2269         num_padding = 8 - (len & 7);
2270         if (!smb3_encryption_required(tcon)) {
2271                 /*
2272                  * If we do not have encryption then we can just add an extra
2273                  * iov for the padding.
2274                  */
2275                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2276                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2277                 rqst->rq_nvec++;
2278                 len += num_padding;
2279         } else {
2280                 /*
2281                  * We can not add a small padding iov for the encryption case
2282                  * because the encryption framework can not handle the padding
2283                  * iovs.
2284                  * We have to flatten this into a single buffer and add
2285                  * the padding to it.
2286                  */
2287                 for (i = 1; i < rqst->rq_nvec; i++) {
2288                         memcpy(rqst->rq_iov[0].iov_base +
2289                                rqst->rq_iov[0].iov_len,
2290                                rqst->rq_iov[i].iov_base,
2291                                rqst->rq_iov[i].iov_len);
2292                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2293                 }
2294                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2295                        0, num_padding);
2296                 rqst->rq_iov[0].iov_len += num_padding;
2297                 len += num_padding;
2298                 rqst->rq_nvec = 1;
2299         }
2300
2301  finished:
2302         shdr->NextCommand = cpu_to_le32(len);
2303 }
2304
2305 /*
2306  * Passes the query info response back to the caller on success.
2307  * Caller need to free this with free_rsp_buf().
2308  */
2309 int
2310 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2311                          __le16 *utf16_path, u32 desired_access,
2312                          u32 class, u32 type, u32 output_len,
2313                          struct kvec *rsp, int *buftype,
2314                          struct cifs_sb_info *cifs_sb)
2315 {
2316         struct cifs_ses *ses = tcon->ses;
2317         int flags = 0;
2318         struct smb_rqst rqst[3];
2319         int resp_buftype[3];
2320         struct kvec rsp_iov[3];
2321         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2322         struct kvec qi_iov[1];
2323         struct kvec close_iov[1];
2324         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2325         struct cifs_open_parms oparms;
2326         struct cifs_fid fid;
2327         int rc;
2328
2329         if (smb3_encryption_required(tcon))
2330                 flags |= CIFS_TRANSFORM_REQ;
2331
2332         memset(rqst, 0, sizeof(rqst));
2333         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2334         memset(rsp_iov, 0, sizeof(rsp_iov));
2335
2336         memset(&open_iov, 0, sizeof(open_iov));
2337         rqst[0].rq_iov = open_iov;
2338         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2339
2340         oparms.tcon = tcon;
2341         oparms.desired_access = desired_access;
2342         oparms.disposition = FILE_OPEN;
2343         if (cifs_sb && backup_cred(cifs_sb))
2344                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2345         else
2346                 oparms.create_options = 0;
2347         oparms.fid = &fid;
2348         oparms.reconnect = false;
2349
2350         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2351         if (rc)
2352                 goto qic_exit;
2353         smb2_set_next_command(tcon, &rqst[0]);
2354
2355         memset(&qi_iov, 0, sizeof(qi_iov));
2356         rqst[1].rq_iov = qi_iov;
2357         rqst[1].rq_nvec = 1;
2358
2359         rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
2360                                   class, type, 0,
2361                                   output_len, 0,
2362                                   NULL);
2363         if (rc)
2364                 goto qic_exit;
2365         smb2_set_next_command(tcon, &rqst[1]);
2366         smb2_set_related(&rqst[1]);
2367
2368         memset(&close_iov, 0, sizeof(close_iov));
2369         rqst[2].rq_iov = close_iov;
2370         rqst[2].rq_nvec = 1;
2371
2372         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2373         if (rc)
2374                 goto qic_exit;
2375         smb2_set_related(&rqst[2]);
2376
2377         rc = compound_send_recv(xid, ses, flags, 3, rqst,
2378                                 resp_buftype, rsp_iov);
2379         if (rc) {
2380                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2381                 if (rc == -EREMCHG) {
2382                         tcon->need_reconnect = true;
2383                         printk_once(KERN_WARNING "server share %s deleted\n",
2384                                     tcon->treeName);
2385                 }
2386                 goto qic_exit;
2387         }
2388         *rsp = rsp_iov[1];
2389         *buftype = resp_buftype[1];
2390
2391  qic_exit:
2392         SMB2_open_free(&rqst[0]);
2393         SMB2_query_info_free(&rqst[1]);
2394         SMB2_close_free(&rqst[2]);
2395         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2396         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2397         return rc;
2398 }
2399
2400 static int
2401 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2402              struct kstatfs *buf)
2403 {
2404         struct smb2_query_info_rsp *rsp;
2405         struct smb2_fs_full_size_info *info = NULL;
2406         __le16 utf16_path = 0; /* Null - open root of share */
2407         struct kvec rsp_iov = {NULL, 0};
2408         int buftype = CIFS_NO_BUFFER;
2409         int rc;
2410
2411
2412         rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2413                                       FILE_READ_ATTRIBUTES,
2414                                       FS_FULL_SIZE_INFORMATION,
2415                                       SMB2_O_INFO_FILESYSTEM,
2416                                       sizeof(struct smb2_fs_full_size_info),
2417                                       &rsp_iov, &buftype, NULL);
2418         if (rc)
2419                 goto qfs_exit;
2420
2421         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2422         buf->f_type = SMB2_MAGIC_NUMBER;
2423         info = (struct smb2_fs_full_size_info *)(
2424                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2425         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2426                                le32_to_cpu(rsp->OutputBufferLength),
2427                                &rsp_iov,
2428                                sizeof(struct smb2_fs_full_size_info));
2429         if (!rc)
2430                 smb2_copy_fs_info_to_kstatfs(info, buf);
2431
2432 qfs_exit:
2433         free_rsp_buf(buftype, rsp_iov.iov_base);
2434         return rc;
2435 }
2436
2437 static int
2438 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2439              struct kstatfs *buf)
2440 {
2441         int rc;
2442         __le16 srch_path = 0; /* Null - open root of share */
2443         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2444         struct cifs_open_parms oparms;
2445         struct cifs_fid fid;
2446
2447         if (!tcon->posix_extensions)
2448                 return smb2_queryfs(xid, tcon, buf);
2449
2450         oparms.tcon = tcon;
2451         oparms.desired_access = FILE_READ_ATTRIBUTES;
2452         oparms.disposition = FILE_OPEN;
2453         oparms.create_options = 0;
2454         oparms.fid = &fid;
2455         oparms.reconnect = false;
2456
2457         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
2458         if (rc)
2459                 return rc;
2460
2461         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2462                                    fid.volatile_fid, buf);
2463         buf->f_type = SMB2_MAGIC_NUMBER;
2464         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2465         return rc;
2466 }
2467
2468 static bool
2469 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2470 {
2471         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2472                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2473 }
2474
2475 static int
2476 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2477                __u64 length, __u32 type, int lock, int unlock, bool wait)
2478 {
2479         if (unlock && !lock)
2480                 type = SMB2_LOCKFLAG_UNLOCK;
2481         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2482                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2483                          current->tgid, length, offset, type, wait);
2484 }
2485
2486 static void
2487 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2488 {
2489         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2490 }
2491
2492 static void
2493 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2494 {
2495         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2496 }
2497
2498 static void
2499 smb2_new_lease_key(struct cifs_fid *fid)
2500 {
2501         generate_random_uuid(fid->lease_key);
2502 }
2503
2504 static int
2505 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2506                    const char *search_name,
2507                    struct dfs_info3_param **target_nodes,
2508                    unsigned int *num_of_nodes,
2509                    const struct nls_table *nls_codepage, int remap)
2510 {
2511         int rc;
2512         __le16 *utf16_path = NULL;
2513         int utf16_path_len = 0;
2514         struct cifs_tcon *tcon;
2515         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2516         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2517         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2518
2519         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2520
2521         /*
2522          * Try to use the IPC tcon, otherwise just use any
2523          */
2524         tcon = ses->tcon_ipc;
2525         if (tcon == NULL) {
2526                 spin_lock(&cifs_tcp_ses_lock);
2527                 tcon = list_first_entry_or_null(&ses->tcon_list,
2528                                                 struct cifs_tcon,
2529                                                 tcon_list);
2530                 if (tcon)
2531                         tcon->tc_count++;
2532                 spin_unlock(&cifs_tcp_ses_lock);
2533         }
2534
2535         if (tcon == NULL) {
2536                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2537                          ses);
2538                 rc = -ENOTCONN;
2539                 goto out;
2540         }
2541
2542         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2543                                            &utf16_path_len,
2544                                            nls_codepage, remap);
2545         if (!utf16_path) {
2546                 rc = -ENOMEM;
2547                 goto out;
2548         }
2549
2550         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2551         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2552         if (!dfs_req) {
2553                 rc = -ENOMEM;
2554                 goto out;
2555         }
2556
2557         /* Highest DFS referral version understood */
2558         dfs_req->MaxReferralLevel = DFS_VERSION;
2559
2560         /* Path to resolve in an UTF-16 null-terminated string */
2561         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2562
2563         do {
2564                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2565                                 FSCTL_DFS_GET_REFERRALS,
2566                                 true /* is_fsctl */,
2567                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2568                                 (char **)&dfs_rsp, &dfs_rsp_size);
2569         } while (rc == -EAGAIN);
2570
2571         if (rc) {
2572                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2573                         cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2574                 goto out;
2575         }
2576
2577         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2578                                  num_of_nodes, target_nodes,
2579                                  nls_codepage, remap, search_name,
2580                                  true /* is_unicode */);
2581         if (rc) {
2582                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2583                 goto out;
2584         }
2585
2586  out:
2587         if (tcon && !tcon->ipc) {
2588                 /* ipc tcons are not refcounted */
2589                 spin_lock(&cifs_tcp_ses_lock);
2590                 tcon->tc_count--;
2591                 spin_unlock(&cifs_tcp_ses_lock);
2592         }
2593         kfree(utf16_path);
2594         kfree(dfs_req);
2595         kfree(dfs_rsp);
2596         return rc;
2597 }
2598
2599 static int
2600 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2601                       u32 plen, char **target_path,
2602                       struct cifs_sb_info *cifs_sb)
2603 {
2604         unsigned int len;
2605
2606         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2607         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2608
2609         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2610                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2611                         le64_to_cpu(symlink_buf->InodeType));
2612                 return -EOPNOTSUPP;
2613         }
2614
2615         *target_path = cifs_strndup_from_utf16(
2616                                 symlink_buf->PathBuffer,
2617                                 len, true, cifs_sb->local_nls);
2618         if (!(*target_path))
2619                 return -ENOMEM;
2620
2621         convert_delimiter(*target_path, '/');
2622         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2623
2624         return 0;
2625 }
2626
2627 static int
2628 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2629                       u32 plen, char **target_path,
2630                       struct cifs_sb_info *cifs_sb)
2631 {
2632         unsigned int sub_len;
2633         unsigned int sub_offset;
2634
2635         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2636
2637         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2638         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2639         if (sub_offset + 20 > plen ||
2640             sub_offset + sub_len + 20 > plen) {
2641                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2642                 return -EIO;
2643         }
2644
2645         *target_path = cifs_strndup_from_utf16(
2646                                 symlink_buf->PathBuffer + sub_offset,
2647                                 sub_len, true, cifs_sb->local_nls);
2648         if (!(*target_path))
2649                 return -ENOMEM;
2650
2651         convert_delimiter(*target_path, '/');
2652         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2653
2654         return 0;
2655 }
2656
2657 static int
2658 parse_reparse_point(struct reparse_data_buffer *buf,
2659                     u32 plen, char **target_path,
2660                     struct cifs_sb_info *cifs_sb)
2661 {
2662         if (plen < sizeof(struct reparse_data_buffer)) {
2663                 cifs_dbg(VFS, "reparse buffer is too small. Must be "
2664                          "at least 8 bytes but was %d\n", plen);
2665                 return -EIO;
2666         }
2667
2668         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2669             sizeof(struct reparse_data_buffer)) {
2670                 cifs_dbg(VFS, "srv returned invalid reparse buf "
2671                          "length: %d\n", plen);
2672                 return -EIO;
2673         }
2674
2675         /* See MS-FSCC 2.1.2 */
2676         switch (le32_to_cpu(buf->ReparseTag)) {
2677         case IO_REPARSE_TAG_NFS:
2678                 return parse_reparse_posix(
2679                         (struct reparse_posix_data *)buf,
2680                         plen, target_path, cifs_sb);
2681         case IO_REPARSE_TAG_SYMLINK:
2682                 return parse_reparse_symlink(
2683                         (struct reparse_symlink_data_buffer *)buf,
2684                         plen, target_path, cifs_sb);
2685         default:
2686                 cifs_dbg(VFS, "srv returned unknown symlink buffer "
2687                          "tag:0x%08x\n", le32_to_cpu(buf->ReparseTag));
2688                 return -EOPNOTSUPP;
2689         }
2690 }
2691
2692 #define SMB2_SYMLINK_STRUCT_SIZE \
2693         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2694
2695 static int
2696 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2697                    struct cifs_sb_info *cifs_sb, const char *full_path,
2698                    char **target_path, bool is_reparse_point)
2699 {
2700         int rc;
2701         __le16 *utf16_path = NULL;
2702         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2703         struct cifs_open_parms oparms;
2704         struct cifs_fid fid;
2705         struct kvec err_iov = {NULL, 0};
2706         struct smb2_err_rsp *err_buf = NULL;
2707         struct smb2_symlink_err_rsp *symlink;
2708         unsigned int sub_len;
2709         unsigned int sub_offset;
2710         unsigned int print_len;
2711         unsigned int print_offset;
2712         int flags = 0;
2713         struct smb_rqst rqst[3];
2714         int resp_buftype[3];
2715         struct kvec rsp_iov[3];
2716         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2717         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2718         struct kvec close_iov[1];
2719         struct smb2_create_rsp *create_rsp;
2720         struct smb2_ioctl_rsp *ioctl_rsp;
2721         struct reparse_data_buffer *reparse_buf;
2722         u32 plen;
2723
2724         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2725
2726         *target_path = NULL;
2727
2728         if (smb3_encryption_required(tcon))
2729                 flags |= CIFS_TRANSFORM_REQ;
2730
2731         memset(rqst, 0, sizeof(rqst));
2732         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2733         memset(rsp_iov, 0, sizeof(rsp_iov));
2734
2735         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2736         if (!utf16_path)
2737                 return -ENOMEM;
2738
2739         /* Open */
2740         memset(&open_iov, 0, sizeof(open_iov));
2741         rqst[0].rq_iov = open_iov;
2742         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2743
2744         memset(&oparms, 0, sizeof(oparms));
2745         oparms.tcon = tcon;
2746         oparms.desired_access = FILE_READ_ATTRIBUTES;
2747         oparms.disposition = FILE_OPEN;
2748
2749         if (backup_cred(cifs_sb))
2750                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2751         else
2752                 oparms.create_options = 0;
2753         if (is_reparse_point)
2754                 oparms.create_options = OPEN_REPARSE_POINT;
2755
2756         oparms.fid = &fid;
2757         oparms.reconnect = false;
2758
2759         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2760         if (rc)
2761                 goto querty_exit;
2762         smb2_set_next_command(tcon, &rqst[0]);
2763
2764
2765         /* IOCTL */
2766         memset(&io_iov, 0, sizeof(io_iov));
2767         rqst[1].rq_iov = io_iov;
2768         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2769
2770         rc = SMB2_ioctl_init(tcon, &rqst[1], fid.persistent_fid,
2771                              fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
2772                              true /* is_fctl */, NULL, 0, CIFSMaxBufSize);
2773         if (rc)
2774                 goto querty_exit;
2775
2776         smb2_set_next_command(tcon, &rqst[1]);
2777         smb2_set_related(&rqst[1]);
2778
2779
2780         /* Close */
2781         memset(&close_iov, 0, sizeof(close_iov));
2782         rqst[2].rq_iov = close_iov;
2783         rqst[2].rq_nvec = 1;
2784
2785         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2786         if (rc)
2787                 goto querty_exit;
2788
2789         smb2_set_related(&rqst[2]);
2790
2791         rc = compound_send_recv(xid, tcon->ses, flags, 3, rqst,
2792                                 resp_buftype, rsp_iov);
2793
2794         create_rsp = rsp_iov[0].iov_base;
2795         if (create_rsp && create_rsp->sync_hdr.Status)
2796                 err_iov = rsp_iov[0];
2797         ioctl_rsp = rsp_iov[1].iov_base;
2798
2799         /*
2800          * Open was successful and we got an ioctl response.
2801          */
2802         if ((rc == 0) && (is_reparse_point)) {
2803                 /* See MS-FSCC 2.3.23 */
2804
2805                 reparse_buf = (struct reparse_data_buffer *)
2806                         ((char *)ioctl_rsp +
2807                          le32_to_cpu(ioctl_rsp->OutputOffset));
2808                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
2809
2810                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
2811                     rsp_iov[1].iov_len) {
2812                         cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
2813                                  plen);
2814                         rc = -EIO;
2815                         goto querty_exit;
2816                 }
2817
2818                 rc = parse_reparse_point(reparse_buf, plen, target_path,
2819                                          cifs_sb);
2820                 goto querty_exit;
2821         }
2822
2823         if (!rc || !err_iov.iov_base) {
2824                 rc = -ENOENT;
2825                 goto querty_exit;
2826         }
2827
2828         err_buf = err_iov.iov_base;
2829         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
2830             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
2831                 rc = -EINVAL;
2832                 goto querty_exit;
2833         }
2834
2835         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2836         if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
2837             le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
2838                 rc = -EINVAL;
2839                 goto querty_exit;
2840         }
2841
2842         /* open must fail on symlink - reset rc */
2843         rc = 0;
2844         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2845         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
2846         print_len = le16_to_cpu(symlink->PrintNameLength);
2847         print_offset = le16_to_cpu(symlink->PrintNameOffset);
2848
2849         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
2850                 rc = -EINVAL;
2851                 goto querty_exit;
2852         }
2853
2854         if (err_iov.iov_len <
2855             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
2856                 rc = -EINVAL;
2857                 goto querty_exit;
2858         }
2859
2860         *target_path = cifs_strndup_from_utf16(
2861                                 (char *)symlink->PathBuffer + sub_offset,
2862                                 sub_len, true, cifs_sb->local_nls);
2863         if (!(*target_path)) {
2864                 rc = -ENOMEM;
2865                 goto querty_exit;
2866         }
2867         convert_delimiter(*target_path, '/');
2868         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2869
2870  querty_exit:
2871         cifs_dbg(FYI, "query symlink rc %d\n", rc);
2872         kfree(utf16_path);
2873         SMB2_open_free(&rqst[0]);
2874         SMB2_ioctl_free(&rqst[1]);
2875         SMB2_close_free(&rqst[2]);
2876         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2877         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2878         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2879         return rc;
2880 }
2881
2882 static struct cifs_ntsd *
2883 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2884                 const struct cifs_fid *cifsfid, u32 *pacllen)
2885 {
2886         struct cifs_ntsd *pntsd = NULL;
2887         unsigned int xid;
2888         int rc = -EOPNOTSUPP;
2889         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2890
2891         if (IS_ERR(tlink))
2892                 return ERR_CAST(tlink);
2893
2894         xid = get_xid();
2895         cifs_dbg(FYI, "trying to get acl\n");
2896
2897         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2898                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
2899         free_xid(xid);
2900
2901         cifs_put_tlink(tlink);
2902
2903         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2904         if (rc)
2905                 return ERR_PTR(rc);
2906         return pntsd;
2907
2908 }
2909
2910 static struct cifs_ntsd *
2911 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
2912                 const char *path, u32 *pacllen)
2913 {
2914         struct cifs_ntsd *pntsd = NULL;
2915         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2916         unsigned int xid;
2917         int rc;
2918         struct cifs_tcon *tcon;
2919         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2920         struct cifs_fid fid;
2921         struct cifs_open_parms oparms;
2922         __le16 *utf16_path;
2923
2924         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
2925         if (IS_ERR(tlink))
2926                 return ERR_CAST(tlink);
2927
2928         tcon = tlink_tcon(tlink);
2929         xid = get_xid();
2930
2931         if (backup_cred(cifs_sb))
2932                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2933         else
2934                 oparms.create_options = 0;
2935
2936         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2937         if (!utf16_path) {
2938                 rc = -ENOMEM;
2939                 free_xid(xid);
2940                 return ERR_PTR(rc);
2941         }
2942
2943         oparms.tcon = tcon;
2944         oparms.desired_access = READ_CONTROL;
2945         oparms.disposition = FILE_OPEN;
2946         oparms.fid = &fid;
2947         oparms.reconnect = false;
2948
2949         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2950         kfree(utf16_path);
2951         if (!rc) {
2952                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2953                             fid.volatile_fid, (void **)&pntsd, pacllen);
2954                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2955         }
2956
2957         cifs_put_tlink(tlink);
2958         free_xid(xid);
2959
2960         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2961         if (rc)
2962                 return ERR_PTR(rc);
2963         return pntsd;
2964 }
2965
2966 static int
2967 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
2968                 struct inode *inode, const char *path, int aclflag)
2969 {
2970         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2971         unsigned int xid;
2972         int rc, access_flags = 0;
2973         struct cifs_tcon *tcon;
2974         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2975         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2976         struct cifs_fid fid;
2977         struct cifs_open_parms oparms;
2978         __le16 *utf16_path;
2979
2980         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
2981         if (IS_ERR(tlink))
2982                 return PTR_ERR(tlink);
2983
2984         tcon = tlink_tcon(tlink);
2985         xid = get_xid();
2986
2987         if (backup_cred(cifs_sb))
2988                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2989         else
2990                 oparms.create_options = 0;
2991
2992         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
2993                 access_flags = WRITE_OWNER;
2994         else
2995                 access_flags = WRITE_DAC;
2996
2997         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2998         if (!utf16_path) {
2999                 rc = -ENOMEM;
3000                 free_xid(xid);
3001                 return rc;
3002         }
3003
3004         oparms.tcon = tcon;
3005         oparms.desired_access = access_flags;
3006         oparms.disposition = FILE_OPEN;
3007         oparms.path = path;
3008         oparms.fid = &fid;
3009         oparms.reconnect = false;
3010
3011         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
3012         kfree(utf16_path);
3013         if (!rc) {
3014                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3015                             fid.volatile_fid, pnntsd, acllen, aclflag);
3016                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3017         }
3018
3019         cifs_put_tlink(tlink);
3020         free_xid(xid);
3021         return rc;
3022 }
3023
3024 /* Retrieve an ACL from the server */
3025 static struct cifs_ntsd *
3026 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3027                                       struct inode *inode, const char *path,
3028                                       u32 *pacllen)
3029 {
3030         struct cifs_ntsd *pntsd = NULL;
3031         struct cifsFileInfo *open_file = NULL;
3032
3033         if (inode)
3034                 open_file = find_readable_file(CIFS_I(inode), true);
3035         if (!open_file)
3036                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
3037
3038         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
3039         cifsFileInfo_put(open_file);
3040         return pntsd;
3041 }
3042
3043 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3044                             loff_t offset, loff_t len, bool keep_size)
3045 {
3046         struct cifs_ses *ses = tcon->ses;
3047         struct inode *inode;
3048         struct cifsInodeInfo *cifsi;
3049         struct cifsFileInfo *cfile = file->private_data;
3050         struct file_zero_data_information fsctl_buf;
3051         long rc;
3052         unsigned int xid;
3053         __le64 eof;
3054
3055         xid = get_xid();
3056
3057         inode = d_inode(cfile->dentry);
3058         cifsi = CIFS_I(inode);
3059
3060         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3061                               ses->Suid, offset, len);
3062
3063
3064         /* if file not oplocked can't be sure whether asking to extend size */
3065         if (!CIFS_CACHE_READ(cifsi))
3066                 if (keep_size == false) {
3067                         rc = -EOPNOTSUPP;
3068                         trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3069                                 tcon->tid, ses->Suid, offset, len, rc);
3070                         free_xid(xid);
3071                         return rc;
3072                 }
3073
3074         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3075
3076         fsctl_buf.FileOffset = cpu_to_le64(offset);
3077         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3078
3079         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3080                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
3081                         (char *)&fsctl_buf,
3082                         sizeof(struct file_zero_data_information),
3083                         0, NULL, NULL);
3084         if (rc)
3085                 goto zero_range_exit;
3086
3087         /*
3088          * do we also need to change the size of the file?
3089          */
3090         if (keep_size == false && i_size_read(inode) < offset + len) {
3091                 eof = cpu_to_le64(offset + len);
3092                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3093                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3094         }
3095
3096  zero_range_exit:
3097         free_xid(xid);
3098         if (rc)
3099                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3100                               ses->Suid, offset, len, rc);
3101         else
3102                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3103                               ses->Suid, offset, len);
3104         return rc;
3105 }
3106
3107 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3108                             loff_t offset, loff_t len)
3109 {
3110         struct inode *inode;
3111         struct cifsFileInfo *cfile = file->private_data;
3112         struct file_zero_data_information fsctl_buf;
3113         long rc;
3114         unsigned int xid;
3115         __u8 set_sparse = 1;
3116
3117         xid = get_xid();
3118
3119         inode = d_inode(cfile->dentry);
3120
3121         /* Need to make file sparse, if not already, before freeing range. */
3122         /* Consider adding equivalent for compressed since it could also work */
3123         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3124                 rc = -EOPNOTSUPP;
3125                 free_xid(xid);
3126                 return rc;
3127         }
3128
3129         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3130
3131         fsctl_buf.FileOffset = cpu_to_le64(offset);
3132         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3133
3134         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3135                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3136                         true /* is_fctl */, (char *)&fsctl_buf,
3137                         sizeof(struct file_zero_data_information),
3138                         CIFSMaxBufSize, NULL, NULL);
3139         free_xid(xid);
3140         return rc;
3141 }
3142
3143 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3144                             loff_t off, loff_t len, bool keep_size)
3145 {
3146         struct inode *inode;
3147         struct cifsInodeInfo *cifsi;
3148         struct cifsFileInfo *cfile = file->private_data;
3149         long rc = -EOPNOTSUPP;
3150         unsigned int xid;
3151         __le64 eof;
3152
3153         xid = get_xid();
3154
3155         inode = d_inode(cfile->dentry);
3156         cifsi = CIFS_I(inode);
3157
3158         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3159                                 tcon->ses->Suid, off, len);
3160         /* if file not oplocked can't be sure whether asking to extend size */
3161         if (!CIFS_CACHE_READ(cifsi))
3162                 if (keep_size == false) {
3163                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3164                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3165                         free_xid(xid);
3166                         return rc;
3167                 }
3168
3169         /*
3170          * Files are non-sparse by default so falloc may be a no-op
3171          * Must check if file sparse. If not sparse, and not extending
3172          * then no need to do anything since file already allocated
3173          */
3174         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3175                 if (keep_size == true)
3176                         rc = 0;
3177                 /* check if extending file */
3178                 else if (i_size_read(inode) >= off + len)
3179                         /* not extending file and already not sparse */
3180                         rc = 0;
3181                 /* BB: in future add else clause to extend file */
3182                 else
3183                         rc = -EOPNOTSUPP;
3184                 if (rc)
3185                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3186                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3187                 else
3188                         trace_smb3_falloc_done(xid, cfile->fid.persistent_fid,
3189                                 tcon->tid, tcon->ses->Suid, off, len);
3190                 free_xid(xid);
3191                 return rc;
3192         }
3193
3194         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3195                 /*
3196                  * Check if falloc starts within first few pages of file
3197                  * and ends within a few pages of the end of file to
3198                  * ensure that most of file is being forced to be
3199                  * fallocated now. If so then setting whole file sparse
3200                  * ie potentially making a few extra pages at the beginning
3201                  * or end of the file non-sparse via set_sparse is harmless.
3202                  */
3203                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3204                         rc = -EOPNOTSUPP;
3205                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3206                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3207                         free_xid(xid);
3208                         return rc;
3209                 }
3210
3211                 smb2_set_sparse(xid, tcon, cfile, inode, false);
3212                 rc = 0;
3213         } else {
3214                 smb2_set_sparse(xid, tcon, cfile, inode, false);
3215                 rc = 0;
3216                 if (i_size_read(inode) < off + len) {
3217                         eof = cpu_to_le64(off + len);
3218                         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3219                                           cfile->fid.volatile_fid, cfile->pid,
3220                                           &eof);
3221                 }
3222         }
3223
3224         if (rc)
3225                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3226                                 tcon->ses->Suid, off, len, rc);
3227         else
3228                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3229                                 tcon->ses->Suid, off, len);
3230
3231         free_xid(xid);
3232         return rc;
3233 }
3234
3235 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3236 {
3237         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3238         struct cifsInodeInfo *cifsi;
3239         struct inode *inode;
3240         int rc = 0;
3241         struct file_allocated_range_buffer in_data, *out_data = NULL;
3242         u32 out_data_len;
3243         unsigned int xid;
3244
3245         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3246                 return generic_file_llseek(file, offset, whence);
3247
3248         inode = d_inode(cfile->dentry);
3249         cifsi = CIFS_I(inode);
3250
3251         if (offset < 0 || offset >= i_size_read(inode))
3252                 return -ENXIO;
3253
3254         xid = get_xid();
3255         /*
3256          * We need to be sure that all dirty pages are written as they
3257          * might fill holes on the server.
3258          * Note that we also MUST flush any written pages since at least
3259          * some servers (Windows2016) will not reflect recent writes in
3260          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3261          */
3262         wrcfile = find_writable_file(cifsi, false);
3263         if (wrcfile) {
3264                 filemap_write_and_wait(inode->i_mapping);
3265                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3266                 cifsFileInfo_put(wrcfile);
3267         }
3268
3269         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3270                 if (whence == SEEK_HOLE)
3271                         offset = i_size_read(inode);
3272                 goto lseek_exit;
3273         }
3274
3275         in_data.file_offset = cpu_to_le64(offset);
3276         in_data.length = cpu_to_le64(i_size_read(inode));
3277
3278         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3279                         cfile->fid.volatile_fid,
3280                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3281                         (char *)&in_data, sizeof(in_data),
3282                         sizeof(struct file_allocated_range_buffer),
3283                         (char **)&out_data, &out_data_len);
3284         if (rc == -E2BIG)
3285                 rc = 0;
3286         if (rc)
3287                 goto lseek_exit;
3288
3289         if (whence == SEEK_HOLE && out_data_len == 0)
3290                 goto lseek_exit;
3291
3292         if (whence == SEEK_DATA && out_data_len == 0) {
3293                 rc = -ENXIO;
3294                 goto lseek_exit;
3295         }
3296
3297         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3298                 rc = -EINVAL;
3299                 goto lseek_exit;
3300         }
3301         if (whence == SEEK_DATA) {
3302                 offset = le64_to_cpu(out_data->file_offset);
3303                 goto lseek_exit;
3304         }
3305         if (offset < le64_to_cpu(out_data->file_offset))
3306                 goto lseek_exit;
3307
3308         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3309
3310  lseek_exit:
3311         free_xid(xid);
3312         kfree(out_data);
3313         if (!rc)
3314                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3315         else
3316                 return rc;
3317 }
3318
3319 static int smb3_fiemap(struct cifs_tcon *tcon,
3320                        struct cifsFileInfo *cfile,
3321                        struct fiemap_extent_info *fei, u64 start, u64 len)
3322 {
3323         unsigned int xid;
3324         struct file_allocated_range_buffer in_data, *out_data;
3325         u32 out_data_len;
3326         int i, num, rc, flags, last_blob;
3327         u64 next;
3328
3329         if (fiemap_check_flags(fei, FIEMAP_FLAG_SYNC))
3330                 return -EBADR;
3331
3332         xid = get_xid();
3333  again:
3334         in_data.file_offset = cpu_to_le64(start);
3335         in_data.length = cpu_to_le64(len);
3336
3337         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3338                         cfile->fid.volatile_fid,
3339                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3340                         (char *)&in_data, sizeof(in_data),
3341                         1024 * sizeof(struct file_allocated_range_buffer),
3342                         (char **)&out_data, &out_data_len);
3343         if (rc == -E2BIG) {
3344                 last_blob = 0;
3345                 rc = 0;
3346         } else
3347                 last_blob = 1;
3348         if (rc)
3349                 goto out;
3350
3351         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3352                 rc = -EINVAL;
3353                 goto out;
3354         }
3355         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3356                 rc = -EINVAL;
3357                 goto out;
3358         }
3359
3360         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3361         for (i = 0; i < num; i++) {
3362                 flags = 0;
3363                 if (i == num - 1 && last_blob)
3364                         flags |= FIEMAP_EXTENT_LAST;
3365
3366                 rc = fiemap_fill_next_extent(fei,
3367                                 le64_to_cpu(out_data[i].file_offset),
3368                                 le64_to_cpu(out_data[i].file_offset),
3369                                 le64_to_cpu(out_data[i].length),
3370                                 flags);
3371                 if (rc < 0)
3372                         goto out;
3373                 if (rc == 1) {
3374                         rc = 0;
3375                         goto out;
3376                 }
3377         }
3378
3379         if (!last_blob) {
3380                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3381                   le64_to_cpu(out_data[num - 1].length);
3382                 len = len - (next - start);
3383                 start = next;
3384                 goto again;
3385         }
3386
3387  out:
3388         free_xid(xid);
3389         kfree(out_data);
3390         return rc;
3391 }
3392
3393 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3394                            loff_t off, loff_t len)
3395 {
3396         /* KEEP_SIZE already checked for by do_fallocate */
3397         if (mode & FALLOC_FL_PUNCH_HOLE)
3398                 return smb3_punch_hole(file, tcon, off, len);
3399         else if (mode & FALLOC_FL_ZERO_RANGE) {
3400                 if (mode & FALLOC_FL_KEEP_SIZE)
3401                         return smb3_zero_range(file, tcon, off, len, true);
3402                 return smb3_zero_range(file, tcon, off, len, false);
3403         } else if (mode == FALLOC_FL_KEEP_SIZE)
3404                 return smb3_simple_falloc(file, tcon, off, len, true);
3405         else if (mode == 0)
3406                 return smb3_simple_falloc(file, tcon, off, len, false);
3407
3408         return -EOPNOTSUPP;
3409 }
3410
3411 static void
3412 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3413                       struct cifsInodeInfo *cinode, __u32 oplock,
3414                       unsigned int epoch, bool *purge_cache)
3415 {
3416         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3417 }
3418
3419 static void
3420 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3421                        unsigned int epoch, bool *purge_cache);
3422
3423 static void
3424 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3425                        struct cifsInodeInfo *cinode, __u32 oplock,
3426                        unsigned int epoch, bool *purge_cache)
3427 {
3428         unsigned int old_state = cinode->oplock;
3429         unsigned int old_epoch = cinode->epoch;
3430         unsigned int new_state;
3431
3432         if (epoch > old_epoch) {
3433                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3434                 cinode->epoch = epoch;
3435         }
3436
3437         new_state = cinode->oplock;
3438         *purge_cache = false;
3439
3440         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3441             (new_state & CIFS_CACHE_READ_FLG) == 0)
3442                 *purge_cache = true;
3443         else if (old_state == new_state && (epoch - old_epoch > 1))
3444                 *purge_cache = true;
3445 }
3446
3447 static void
3448 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3449                       unsigned int epoch, bool *purge_cache)
3450 {
3451         oplock &= 0xFF;
3452         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3453                 return;
3454         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3455                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3456                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3457                          &cinode->vfs_inode);
3458         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3459                 cinode->oplock = CIFS_CACHE_RW_FLG;
3460                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3461                          &cinode->vfs_inode);
3462         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3463                 cinode->oplock = CIFS_CACHE_READ_FLG;
3464                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3465                          &cinode->vfs_inode);
3466         } else
3467                 cinode->oplock = 0;
3468 }
3469
3470 static void
3471 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3472                        unsigned int epoch, bool *purge_cache)
3473 {
3474         char message[5] = {0};
3475         unsigned int new_oplock = 0;
3476
3477         oplock &= 0xFF;
3478         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3479                 return;
3480
3481         /* Check if the server granted an oplock rather than a lease */
3482         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3483                 return smb2_set_oplock_level(cinode, oplock, epoch,
3484                                              purge_cache);
3485
3486         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3487                 new_oplock |= CIFS_CACHE_READ_FLG;
3488                 strcat(message, "R");
3489         }
3490         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3491                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3492                 strcat(message, "H");
3493         }
3494         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3495                 new_oplock |= CIFS_CACHE_WRITE_FLG;
3496                 strcat(message, "W");
3497         }
3498         if (!new_oplock)
3499                 strncpy(message, "None", sizeof(message));
3500
3501         cinode->oplock = new_oplock;
3502         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3503                  &cinode->vfs_inode);
3504 }
3505
3506 static void
3507 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3508                       unsigned int epoch, bool *purge_cache)
3509 {
3510         unsigned int old_oplock = cinode->oplock;
3511
3512         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3513
3514         if (purge_cache) {
3515                 *purge_cache = false;
3516                 if (old_oplock == CIFS_CACHE_READ_FLG) {
3517                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3518                             (epoch - cinode->epoch > 0))
3519                                 *purge_cache = true;
3520                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3521                                  (epoch - cinode->epoch > 1))
3522                                 *purge_cache = true;
3523                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3524                                  (epoch - cinode->epoch > 1))
3525                                 *purge_cache = true;
3526                         else if (cinode->oplock == 0 &&
3527                                  (epoch - cinode->epoch > 0))
3528                                 *purge_cache = true;
3529                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3530                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3531                             (epoch - cinode->epoch > 0))
3532                                 *purge_cache = true;
3533                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3534                                  (epoch - cinode->epoch > 1))
3535                                 *purge_cache = true;
3536                 }
3537                 cinode->epoch = epoch;
3538         }
3539 }
3540
3541 static bool
3542 smb2_is_read_op(__u32 oplock)
3543 {
3544         return oplock == SMB2_OPLOCK_LEVEL_II;
3545 }
3546
3547 static bool
3548 smb21_is_read_op(__u32 oplock)
3549 {
3550         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
3551                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
3552 }
3553
3554 static __le32
3555 map_oplock_to_lease(u8 oplock)
3556 {
3557         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3558                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
3559         else if (oplock == SMB2_OPLOCK_LEVEL_II)
3560                 return SMB2_LEASE_READ_CACHING;
3561         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
3562                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
3563                        SMB2_LEASE_WRITE_CACHING;
3564         return 0;
3565 }
3566
3567 static char *
3568 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
3569 {
3570         struct create_lease *buf;
3571
3572         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
3573         if (!buf)
3574                 return NULL;
3575
3576         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3577         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3578
3579         buf->ccontext.DataOffset = cpu_to_le16(offsetof
3580                                         (struct create_lease, lcontext));
3581         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
3582         buf->ccontext.NameOffset = cpu_to_le16(offsetof
3583                                 (struct create_lease, Name));
3584         buf->ccontext.NameLength = cpu_to_le16(4);
3585         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3586         buf->Name[0] = 'R';
3587         buf->Name[1] = 'q';
3588         buf->Name[2] = 'L';
3589         buf->Name[3] = 's';
3590         return (char *)buf;
3591 }
3592
3593 static char *
3594 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
3595 {
3596         struct create_lease_v2 *buf;
3597
3598         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
3599         if (!buf)
3600                 return NULL;
3601
3602         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3603         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3604
3605         buf->ccontext.DataOffset = cpu_to_le16(offsetof
3606                                         (struct create_lease_v2, lcontext));
3607         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
3608         buf->ccontext.NameOffset = cpu_to_le16(offsetof
3609                                 (struct create_lease_v2, Name));
3610         buf->ccontext.NameLength = cpu_to_le16(4);
3611         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3612         buf->Name[0] = 'R';
3613         buf->Name[1] = 'q';
3614         buf->Name[2] = 'L';
3615         buf->Name[3] = 's';
3616         return (char *)buf;
3617 }
3618
3619 static __u8
3620 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3621 {
3622         struct create_lease *lc = (struct create_lease *)buf;
3623
3624         *epoch = 0; /* not used */
3625         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3626                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3627         return le32_to_cpu(lc->lcontext.LeaseState);
3628 }
3629
3630 static __u8
3631 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3632 {
3633         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
3634
3635         *epoch = le16_to_cpu(lc->lcontext.Epoch);
3636         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3637                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3638         if (lease_key)
3639                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
3640         return le32_to_cpu(lc->lcontext.LeaseState);
3641 }
3642
3643 static unsigned int
3644 smb2_wp_retry_size(struct inode *inode)
3645 {
3646         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
3647                      SMB2_MAX_BUFFER_SIZE);
3648 }
3649
3650 static bool
3651 smb2_dir_needs_close(struct cifsFileInfo *cfile)
3652 {
3653         return !cfile->invalidHandle;
3654 }
3655
3656 static void
3657 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
3658                    struct smb_rqst *old_rq, __le16 cipher_type)
3659 {
3660         struct smb2_sync_hdr *shdr =
3661                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
3662
3663         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
3664         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
3665         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
3666         tr_hdr->Flags = cpu_to_le16(0x01);
3667         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3668                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3669         else
3670                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3671         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
3672 }
3673
3674 /* We can not use the normal sg_set_buf() as we will sometimes pass a
3675  * stack object as buf.
3676  */
3677 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
3678                                    unsigned int buflen)
3679 {
3680         void *addr;
3681         /*
3682          * VMAP_STACK (at least) puts stack into the vmalloc address space
3683          */
3684         if (is_vmalloc_addr(buf))
3685                 addr = vmalloc_to_page(buf);
3686         else
3687                 addr = virt_to_page(buf);
3688         sg_set_page(sg, addr, buflen, offset_in_page(buf));
3689 }
3690
3691 /* Assumes the first rqst has a transform header as the first iov.
3692  * I.e.
3693  * rqst[0].rq_iov[0]  is transform header
3694  * rqst[0].rq_iov[1+] data to be encrypted/decrypted
3695  * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
3696  */
3697 static struct scatterlist *
3698 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
3699 {
3700         unsigned int sg_len;
3701         struct scatterlist *sg;
3702         unsigned int i;
3703         unsigned int j;
3704         unsigned int idx = 0;
3705         int skip;
3706
3707         sg_len = 1;
3708         for (i = 0; i < num_rqst; i++)
3709                 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
3710
3711         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
3712         if (!sg)
3713                 return NULL;
3714
3715         sg_init_table(sg, sg_len);
3716         for (i = 0; i < num_rqst; i++) {
3717                 for (j = 0; j < rqst[i].rq_nvec; j++) {
3718                         /*
3719                          * The first rqst has a transform header where the
3720                          * first 20 bytes are not part of the encrypted blob
3721                          */
3722                         skip = (i == 0) && (j == 0) ? 20 : 0;
3723                         smb2_sg_set_buf(&sg[idx++],
3724                                         rqst[i].rq_iov[j].iov_base + skip,
3725                                         rqst[i].rq_iov[j].iov_len - skip);
3726                         }
3727
3728                 for (j = 0; j < rqst[i].rq_npages; j++) {
3729                         unsigned int len, offset;
3730
3731                         rqst_page_get_length(&rqst[i], j, &len, &offset);
3732                         sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
3733                 }
3734         }
3735         smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
3736         return sg;
3737 }
3738
3739 static int
3740 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
3741 {
3742         struct cifs_ses *ses;
3743         u8 *ses_enc_key;
3744
3745         spin_lock(&cifs_tcp_ses_lock);
3746         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
3747                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3748                         if (ses->Suid == ses_id) {
3749                                 ses_enc_key = enc ? ses->smb3encryptionkey :
3750                                         ses->smb3decryptionkey;
3751                                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
3752                                 spin_unlock(&cifs_tcp_ses_lock);
3753                                 return 0;
3754                         }
3755                 }
3756         }
3757         spin_unlock(&cifs_tcp_ses_lock);
3758
3759         return 1;
3760 }
3761 /*
3762  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
3763  * iov[0]   - transform header (associate data),
3764  * iov[1-N] - SMB2 header and pages - data to encrypt.
3765  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
3766  * untouched.
3767  */
3768 static int
3769 crypt_message(struct TCP_Server_Info *server, int num_rqst,
3770               struct smb_rqst *rqst, int enc)
3771 {
3772         struct smb2_transform_hdr *tr_hdr =
3773                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
3774         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
3775         int rc = 0;
3776         struct scatterlist *sg;
3777         u8 sign[SMB2_SIGNATURE_SIZE] = {};
3778         u8 key[SMB3_SIGN_KEY_SIZE];
3779         struct aead_request *req;
3780         char *iv;
3781         unsigned int iv_len;
3782         DECLARE_CRYPTO_WAIT(wait);
3783         struct crypto_aead *tfm;
3784         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3785
3786         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
3787         if (rc) {
3788                 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
3789                          enc ? "en" : "de");
3790                 return 0;
3791         }
3792
3793         rc = smb3_crypto_aead_allocate(server);
3794         if (rc) {
3795                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
3796                 return rc;
3797         }
3798
3799         tfm = enc ? server->secmech.ccmaesencrypt :
3800                                                 server->secmech.ccmaesdecrypt;
3801         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
3802         if (rc) {
3803                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
3804                 return rc;
3805         }
3806
3807         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
3808         if (rc) {
3809                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
3810                 return rc;
3811         }
3812
3813         req = aead_request_alloc(tfm, GFP_KERNEL);
3814         if (!req) {
3815                 cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
3816                 return -ENOMEM;
3817         }
3818
3819         if (!enc) {
3820                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
3821                 crypt_len += SMB2_SIGNATURE_SIZE;
3822         }
3823
3824         sg = init_sg(num_rqst, rqst, sign);
3825         if (!sg) {
3826                 cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
3827                 rc = -ENOMEM;
3828                 goto free_req;
3829         }
3830
3831         iv_len = crypto_aead_ivsize(tfm);
3832         iv = kzalloc(iv_len, GFP_KERNEL);
3833         if (!iv) {
3834                 cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
3835                 rc = -ENOMEM;
3836                 goto free_sg;
3837         }
3838
3839         if (server->cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3840                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3841         else {
3842                 iv[0] = 3;
3843                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3844         }
3845
3846         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
3847         aead_request_set_ad(req, assoc_data_len);
3848
3849         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
3850                                   crypto_req_done, &wait);
3851
3852         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
3853                                 : crypto_aead_decrypt(req), &wait);
3854
3855         if (!rc && enc)
3856                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
3857
3858         kfree(iv);
3859 free_sg:
3860         kfree(sg);
3861 free_req:
3862         kfree(req);
3863         return rc;
3864 }
3865
3866 void
3867 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
3868 {
3869         int i, j;
3870
3871         for (i = 0; i < num_rqst; i++) {
3872                 if (rqst[i].rq_pages) {
3873                         for (j = rqst[i].rq_npages - 1; j >= 0; j--)
3874                                 put_page(rqst[i].rq_pages[j]);
3875                         kfree(rqst[i].rq_pages);
3876                 }
3877         }
3878 }
3879
3880 /*
3881  * This function will initialize new_rq and encrypt the content.
3882  * The first entry, new_rq[0], only contains a single iov which contains
3883  * a smb2_transform_hdr and is pre-allocated by the caller.
3884  * This function then populates new_rq[1+] with the content from olq_rq[0+].
3885  *
3886  * The end result is an array of smb_rqst structures where the first structure
3887  * only contains a single iov for the transform header which we then can pass
3888  * to crypt_message().
3889  *
3890  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
3891  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
3892  */
3893 static int
3894 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
3895                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
3896 {
3897         struct page **pages;
3898         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
3899         unsigned int npages;
3900         unsigned int orig_len = 0;
3901         int i, j;
3902         int rc = -ENOMEM;
3903
3904         for (i = 1; i < num_rqst; i++) {
3905                 npages = old_rq[i - 1].rq_npages;
3906                 pages = kmalloc_array(npages, sizeof(struct page *),
3907                                       GFP_KERNEL);
3908                 if (!pages)
3909                         goto err_free;
3910
3911                 new_rq[i].rq_pages = pages;
3912                 new_rq[i].rq_npages = npages;
3913                 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
3914                 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
3915                 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
3916                 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
3917                 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
3918
3919                 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
3920
3921                 for (j = 0; j < npages; j++) {
3922                         pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3923                         if (!pages[j])
3924                                 goto err_free;
3925                 }
3926
3927                 /* copy pages form the old */
3928                 for (j = 0; j < npages; j++) {
3929                         char *dst, *src;
3930                         unsigned int offset, len;
3931
3932                         rqst_page_get_length(&new_rq[i], j, &len, &offset);
3933
3934                         dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
3935                         src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
3936
3937                         memcpy(dst, src, len);
3938                         kunmap(new_rq[i].rq_pages[j]);
3939                         kunmap(old_rq[i - 1].rq_pages[j]);
3940                 }
3941         }
3942
3943         /* fill the 1st iov with a transform header */
3944         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
3945
3946         rc = crypt_message(server, num_rqst, new_rq, 1);
3947         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
3948         if (rc)
3949                 goto err_free;
3950
3951         return rc;
3952
3953 err_free:
3954         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
3955         return rc;
3956 }
3957
3958 static int
3959 smb3_is_transform_hdr(void *buf)
3960 {
3961         struct smb2_transform_hdr *trhdr = buf;
3962
3963         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
3964 }
3965
3966 static int
3967 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
3968                  unsigned int buf_data_size, struct page **pages,
3969                  unsigned int npages, unsigned int page_data_size)
3970 {
3971         struct kvec iov[2];
3972         struct smb_rqst rqst = {NULL};
3973         int rc;
3974
3975         iov[0].iov_base = buf;
3976         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
3977         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
3978         iov[1].iov_len = buf_data_size;
3979
3980         rqst.rq_iov = iov;
3981         rqst.rq_nvec = 2;
3982         rqst.rq_pages = pages;
3983         rqst.rq_npages = npages;
3984         rqst.rq_pagesz = PAGE_SIZE;
3985         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
3986
3987         rc = crypt_message(server, 1, &rqst, 0);
3988         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
3989
3990         if (rc)
3991                 return rc;
3992
3993         memmove(buf, iov[1].iov_base, buf_data_size);
3994
3995         server->total_read = buf_data_size + page_data_size;
3996
3997         return rc;
3998 }
3999
4000 static int
4001 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4002                      unsigned int npages, unsigned int len)
4003 {
4004         int i;
4005         int length;
4006
4007         for (i = 0; i < npages; i++) {
4008                 struct page *page = pages[i];
4009                 size_t n;
4010
4011                 n = len;
4012                 if (len >= PAGE_SIZE) {
4013                         /* enough data to fill the page */
4014                         n = PAGE_SIZE;
4015                         len -= n;
4016                 } else {
4017                         zero_user(page, len, PAGE_SIZE - len);
4018                         len = 0;
4019                 }
4020                 length = cifs_read_page_from_socket(server, page, 0, n);
4021                 if (length < 0)
4022                         return length;
4023                 server->total_read += length;
4024         }
4025
4026         return 0;
4027 }
4028
4029 static int
4030 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4031                unsigned int cur_off, struct bio_vec **page_vec)
4032 {
4033         struct bio_vec *bvec;
4034         int i;
4035
4036         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4037         if (!bvec)
4038                 return -ENOMEM;
4039
4040         for (i = 0; i < npages; i++) {
4041                 bvec[i].bv_page = pages[i];
4042                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4043                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4044                 data_size -= bvec[i].bv_len;
4045         }
4046
4047         if (data_size != 0) {
4048                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4049                 kfree(bvec);
4050                 return -EIO;
4051         }
4052
4053         *page_vec = bvec;
4054         return 0;
4055 }
4056
4057 static int
4058 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4059                  char *buf, unsigned int buf_len, struct page **pages,
4060                  unsigned int npages, unsigned int page_data_size)
4061 {
4062         unsigned int data_offset;
4063         unsigned int data_len;
4064         unsigned int cur_off;
4065         unsigned int cur_page_idx;
4066         unsigned int pad_len;
4067         struct cifs_readdata *rdata = mid->callback_data;
4068         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4069         struct bio_vec *bvec = NULL;
4070         struct iov_iter iter;
4071         struct kvec iov;
4072         int length;
4073         bool use_rdma_mr = false;
4074
4075         if (shdr->Command != SMB2_READ) {
4076                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4077                 return -ENOTSUPP;
4078         }
4079
4080         if (server->ops->is_session_expired &&
4081             server->ops->is_session_expired(buf)) {
4082                 cifs_reconnect(server);
4083                 wake_up(&server->response_q);
4084                 return -1;
4085         }
4086
4087         if (server->ops->is_status_pending &&
4088                         server->ops->is_status_pending(buf, server))
4089                 return -1;
4090
4091         /* set up first two iov to get credits */
4092         rdata->iov[0].iov_base = buf;
4093         rdata->iov[0].iov_len = 0;
4094         rdata->iov[1].iov_base = buf;
4095         rdata->iov[1].iov_len =
4096                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4097         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4098                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4099         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4100                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4101
4102         rdata->result = server->ops->map_error(buf, true);
4103         if (rdata->result != 0) {
4104                 cifs_dbg(FYI, "%s: server returned error %d\n",
4105                          __func__, rdata->result);
4106                 /* normal error on read response */
4107                 dequeue_mid(mid, false);
4108                 return 0;
4109         }
4110
4111         data_offset = server->ops->read_data_offset(buf);
4112 #ifdef CONFIG_CIFS_SMB_DIRECT
4113         use_rdma_mr = rdata->mr;
4114 #endif
4115         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4116
4117         if (data_offset < server->vals->read_rsp_size) {
4118                 /*
4119                  * win2k8 sometimes sends an offset of 0 when the read
4120                  * is beyond the EOF. Treat it as if the data starts just after
4121                  * the header.
4122                  */
4123                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4124                          __func__, data_offset);
4125                 data_offset = server->vals->read_rsp_size;
4126         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4127                 /* data_offset is beyond the end of smallbuf */
4128                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4129                          __func__, data_offset);
4130                 rdata->result = -EIO;
4131                 dequeue_mid(mid, rdata->result);
4132                 return 0;
4133         }
4134
4135         pad_len = data_offset - server->vals->read_rsp_size;
4136
4137         if (buf_len <= data_offset) {
4138                 /* read response payload is in pages */
4139                 cur_page_idx = pad_len / PAGE_SIZE;
4140                 cur_off = pad_len % PAGE_SIZE;
4141
4142                 if (cur_page_idx != 0) {
4143                         /* data offset is beyond the 1st page of response */
4144                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4145                                  __func__, data_offset);
4146                         rdata->result = -EIO;
4147                         dequeue_mid(mid, rdata->result);
4148                         return 0;
4149                 }
4150
4151                 if (data_len > page_data_size - pad_len) {
4152                         /* data_len is corrupt -- discard frame */
4153                         rdata->result = -EIO;
4154                         dequeue_mid(mid, rdata->result);
4155                         return 0;
4156                 }
4157
4158                 rdata->result = init_read_bvec(pages, npages, page_data_size,
4159                                                cur_off, &bvec);
4160                 if (rdata->result != 0) {
4161                         dequeue_mid(mid, rdata->result);
4162                         return 0;
4163                 }
4164
4165                 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4166         } else if (buf_len >= data_offset + data_len) {
4167                 /* read response payload is in buf */
4168                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4169                 iov.iov_base = buf + data_offset;
4170                 iov.iov_len = data_len;
4171                 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4172         } else {
4173                 /* read response payload cannot be in both buf and pages */
4174                 WARN_ONCE(1, "buf can not contain only a part of read data");
4175                 rdata->result = -EIO;
4176                 dequeue_mid(mid, rdata->result);
4177                 return 0;
4178         }
4179
4180         length = rdata->copy_into_pages(server, rdata, &iter);
4181
4182         kfree(bvec);
4183
4184         if (length < 0)
4185                 return length;
4186
4187         dequeue_mid(mid, false);
4188         return length;
4189 }
4190
4191 struct smb2_decrypt_work {
4192         struct work_struct decrypt;
4193         struct TCP_Server_Info *server;
4194         struct page **ppages;
4195         char *buf;
4196         unsigned int npages;
4197         unsigned int len;
4198 };
4199
4200
4201 static void smb2_decrypt_offload(struct work_struct *work)
4202 {
4203         struct smb2_decrypt_work *dw = container_of(work,
4204                                 struct smb2_decrypt_work, decrypt);
4205         int i, rc;
4206         struct mid_q_entry *mid;
4207
4208         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4209                               dw->ppages, dw->npages, dw->len);
4210         if (rc) {
4211                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4212                 goto free_pages;
4213         }
4214
4215         dw->server->lstrp = jiffies;
4216         mid = smb2_find_mid(dw->server, dw->buf);
4217         if (mid == NULL)
4218                 cifs_dbg(FYI, "mid not found\n");
4219         else {
4220                 mid->decrypted = true;
4221                 rc = handle_read_data(dw->server, mid, dw->buf,
4222                                       dw->server->vals->read_rsp_size,
4223                                       dw->ppages, dw->npages, dw->len);
4224                 mid->callback(mid);
4225                 cifs_mid_q_entry_release(mid);
4226         }
4227
4228 free_pages:
4229         for (i = dw->npages-1; i >= 0; i--)
4230                 put_page(dw->ppages[i]);
4231
4232         kfree(dw->ppages);
4233         cifs_small_buf_release(dw->buf);
4234         kfree(dw);
4235 }
4236
4237
4238 static int
4239 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4240                        int *num_mids)
4241 {
4242         char *buf = server->smallbuf;
4243         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4244         unsigned int npages;
4245         struct page **pages;
4246         unsigned int len;
4247         unsigned int buflen = server->pdu_size;
4248         int rc;
4249         int i = 0;
4250         struct smb2_decrypt_work *dw;
4251
4252         *num_mids = 1;
4253         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4254                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4255
4256         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4257         if (rc < 0)
4258                 return rc;
4259         server->total_read += rc;
4260
4261         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4262                 server->vals->read_rsp_size;
4263         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4264
4265         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4266         if (!pages) {
4267                 rc = -ENOMEM;
4268                 goto discard_data;
4269         }
4270
4271         for (; i < npages; i++) {
4272                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4273                 if (!pages[i]) {
4274                         rc = -ENOMEM;
4275                         goto discard_data;
4276                 }
4277         }
4278
4279         /* read read data into pages */
4280         rc = read_data_into_pages(server, pages, npages, len);
4281         if (rc)
4282                 goto free_pages;
4283
4284         rc = cifs_discard_remaining_data(server);
4285         if (rc)
4286                 goto free_pages;
4287
4288         /*
4289          * For large reads, offload to different thread for better performance,
4290          * use more cores decrypting which can be expensive
4291          */
4292
4293         if ((server->min_offload) && (server->in_flight > 1) &&
4294             (server->pdu_size >= server->min_offload)) {
4295                 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4296                 if (dw == NULL)
4297                         goto non_offloaded_decrypt;
4298
4299                 dw->buf = server->smallbuf;
4300                 server->smallbuf = (char *)cifs_small_buf_get();
4301
4302                 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4303
4304                 dw->npages = npages;
4305                 dw->server = server;
4306                 dw->ppages = pages;
4307                 dw->len = len;
4308                 queue_work(decrypt_wq, &dw->decrypt);
4309                 *num_mids = 0; /* worker thread takes care of finding mid */
4310                 return -1;
4311         }
4312
4313 non_offloaded_decrypt:
4314         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4315                               pages, npages, len);
4316         if (rc)
4317                 goto free_pages;
4318
4319         *mid = smb2_find_mid(server, buf);
4320         if (*mid == NULL)
4321                 cifs_dbg(FYI, "mid not found\n");
4322         else {
4323                 cifs_dbg(FYI, "mid found\n");
4324                 (*mid)->decrypted = true;
4325                 rc = handle_read_data(server, *mid, buf,
4326                                       server->vals->read_rsp_size,
4327                                       pages, npages, len);
4328         }
4329
4330 free_pages:
4331         for (i = i - 1; i >= 0; i--)
4332                 put_page(pages[i]);
4333         kfree(pages);
4334         return rc;
4335 discard_data:
4336         cifs_discard_remaining_data(server);
4337         goto free_pages;
4338 }
4339
4340 static int
4341 receive_encrypted_standard(struct TCP_Server_Info *server,
4342                            struct mid_q_entry **mids, char **bufs,
4343                            int *num_mids)
4344 {
4345         int ret, length;
4346         char *buf = server->smallbuf;
4347         struct smb2_sync_hdr *shdr;
4348         unsigned int pdu_length = server->pdu_size;
4349         unsigned int buf_size;
4350         struct mid_q_entry *mid_entry;
4351         int next_is_large;
4352         char *next_buffer = NULL;
4353
4354         *num_mids = 0;
4355
4356         /* switch to large buffer if too big for a small one */
4357         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4358                 server->large_buf = true;
4359                 memcpy(server->bigbuf, buf, server->total_read);
4360                 buf = server->bigbuf;
4361         }
4362
4363         /* now read the rest */
4364         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4365                                 pdu_length - HEADER_SIZE(server) + 1);
4366         if (length < 0)
4367                 return length;
4368         server->total_read += length;
4369
4370         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4371         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
4372         if (length)
4373                 return length;
4374
4375         next_is_large = server->large_buf;
4376 one_more:
4377         shdr = (struct smb2_sync_hdr *)buf;
4378         if (shdr->NextCommand) {
4379                 if (next_is_large)
4380                         next_buffer = (char *)cifs_buf_get();
4381                 else
4382                         next_buffer = (char *)cifs_small_buf_get();
4383                 memcpy(next_buffer,
4384                        buf + le32_to_cpu(shdr->NextCommand),
4385                        pdu_length - le32_to_cpu(shdr->NextCommand));
4386         }
4387
4388         mid_entry = smb2_find_mid(server, buf);
4389         if (mid_entry == NULL)
4390                 cifs_dbg(FYI, "mid not found\n");
4391         else {
4392                 cifs_dbg(FYI, "mid found\n");
4393                 mid_entry->decrypted = true;
4394                 mid_entry->resp_buf_size = server->pdu_size;
4395         }
4396
4397         if (*num_mids >= MAX_COMPOUND) {
4398                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4399                 return -1;
4400         }
4401         bufs[*num_mids] = buf;
4402         mids[(*num_mids)++] = mid_entry;
4403
4404         if (mid_entry && mid_entry->handle)
4405                 ret = mid_entry->handle(server, mid_entry);
4406         else
4407                 ret = cifs_handle_standard(server, mid_entry);
4408
4409         if (ret == 0 && shdr->NextCommand) {
4410                 pdu_length -= le32_to_cpu(shdr->NextCommand);
4411                 server->large_buf = next_is_large;
4412                 if (next_is_large)
4413                         server->bigbuf = buf = next_buffer;
4414                 else
4415                         server->smallbuf = buf = next_buffer;
4416                 goto one_more;
4417         } else if (ret != 0) {
4418                 /*
4419                  * ret != 0 here means that we didn't get to handle_mid() thus
4420                  * server->smallbuf and server->bigbuf are still valid. We need
4421                  * to free next_buffer because it is not going to be used
4422                  * anywhere.
4423                  */
4424                 if (next_is_large)
4425                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4426                 else
4427                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4428         }
4429
4430         return ret;
4431 }
4432
4433 static int
4434 smb3_receive_transform(struct TCP_Server_Info *server,
4435                        struct mid_q_entry **mids, char **bufs, int *num_mids)
4436 {
4437         char *buf = server->smallbuf;
4438         unsigned int pdu_length = server->pdu_size;
4439         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4440         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4441
4442         if (pdu_length < sizeof(struct smb2_transform_hdr) +
4443                                                 sizeof(struct smb2_sync_hdr)) {
4444                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4445                          pdu_length);
4446                 cifs_reconnect(server);
4447                 wake_up(&server->response_q);
4448                 return -ECONNABORTED;
4449         }
4450
4451         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4452                 cifs_server_dbg(VFS, "Transform message is broken\n");
4453                 cifs_reconnect(server);
4454                 wake_up(&server->response_q);
4455                 return -ECONNABORTED;
4456         }
4457
4458         /* TODO: add support for compounds containing READ. */
4459         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4460                 return receive_encrypted_read(server, &mids[0], num_mids);
4461         }
4462
4463         return receive_encrypted_standard(server, mids, bufs, num_mids);
4464 }
4465
4466 int
4467 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4468 {
4469         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4470
4471         return handle_read_data(server, mid, buf, server->pdu_size,
4472                                 NULL, 0, 0);
4473 }
4474
4475 static int
4476 smb2_next_header(char *buf)
4477 {
4478         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
4479         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4480
4481         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
4482                 return sizeof(struct smb2_transform_hdr) +
4483                   le32_to_cpu(t_hdr->OriginalMessageSize);
4484
4485         return le32_to_cpu(hdr->NextCommand);
4486 }
4487
4488 static int
4489 smb2_make_node(unsigned int xid, struct inode *inode,
4490                struct dentry *dentry, struct cifs_tcon *tcon,
4491                char *full_path, umode_t mode, dev_t dev)
4492 {
4493         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
4494         int rc = -EPERM;
4495         int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL;
4496         FILE_ALL_INFO *buf = NULL;
4497         struct cifs_io_parms io_parms;
4498         __u32 oplock = 0;
4499         struct cifs_fid fid;
4500         struct cifs_open_parms oparms;
4501         unsigned int bytes_written;
4502         struct win_dev *pdev;
4503         struct kvec iov[2];
4504
4505         /*
4506          * Check if mounted with mount parm 'sfu' mount parm.
4507          * SFU emulation should work with all servers, but only
4508          * supports block and char device (no socket & fifo),
4509          * and was used by default in earlier versions of Windows
4510          */
4511         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
4512                 goto out;
4513
4514         /*
4515          * TODO: Add ability to create instead via reparse point. Windows (e.g.
4516          * their current NFS server) uses this approach to expose special files
4517          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
4518          */
4519
4520         if (!S_ISCHR(mode) && !S_ISBLK(mode))
4521                 goto out;
4522
4523         cifs_dbg(FYI, "sfu compat create special file\n");
4524
4525         buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
4526         if (buf == NULL) {
4527                 rc = -ENOMEM;
4528                 goto out;
4529         }
4530
4531         if (backup_cred(cifs_sb))
4532                 create_options |= CREATE_OPEN_BACKUP_INTENT;
4533
4534         oparms.tcon = tcon;
4535         oparms.cifs_sb = cifs_sb;
4536         oparms.desired_access = GENERIC_WRITE;
4537         oparms.create_options = create_options;
4538         oparms.disposition = FILE_CREATE;
4539         oparms.path = full_path;
4540         oparms.fid = &fid;
4541         oparms.reconnect = false;
4542
4543         if (tcon->ses->server->oplocks)
4544                 oplock = REQ_OPLOCK;
4545         else
4546                 oplock = 0;
4547         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
4548         if (rc)
4549                 goto out;
4550
4551         /*
4552          * BB Do not bother to decode buf since no local inode yet to put
4553          * timestamps in, but we can reuse it safely.
4554          */
4555
4556         pdev = (struct win_dev *)buf;
4557         io_parms.pid = current->tgid;
4558         io_parms.tcon = tcon;
4559         io_parms.offset = 0;
4560         io_parms.length = sizeof(struct win_dev);
4561         iov[1].iov_base = buf;
4562         iov[1].iov_len = sizeof(struct win_dev);
4563         if (S_ISCHR(mode)) {
4564                 memcpy(pdev->type, "IntxCHR", 8);
4565                 pdev->major = cpu_to_le64(MAJOR(dev));
4566                 pdev->minor = cpu_to_le64(MINOR(dev));
4567                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4568                                                         &bytes_written, iov, 1);
4569         } else if (S_ISBLK(mode)) {
4570                 memcpy(pdev->type, "IntxBLK", 8);
4571                 pdev->major = cpu_to_le64(MAJOR(dev));
4572                 pdev->minor = cpu_to_le64(MINOR(dev));
4573                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4574                                                         &bytes_written, iov, 1);
4575         }
4576         tcon->ses->server->ops->close(xid, tcon, &fid);
4577         d_drop(dentry);
4578
4579         /* FIXME: add code here to set EAs */
4580 out:
4581         kfree(buf);
4582         return rc;
4583 }
4584
4585
4586 struct smb_version_operations smb20_operations = {
4587         .compare_fids = smb2_compare_fids,
4588         .setup_request = smb2_setup_request,
4589         .setup_async_request = smb2_setup_async_request,
4590         .check_receive = smb2_check_receive,
4591         .add_credits = smb2_add_credits,
4592         .set_credits = smb2_set_credits,
4593         .get_credits_field = smb2_get_credits_field,
4594         .get_credits = smb2_get_credits,
4595         .wait_mtu_credits = cifs_wait_mtu_credits,
4596         .get_next_mid = smb2_get_next_mid,
4597         .revert_current_mid = smb2_revert_current_mid,
4598         .read_data_offset = smb2_read_data_offset,
4599         .read_data_length = smb2_read_data_length,
4600         .map_error = map_smb2_to_linux_error,
4601         .find_mid = smb2_find_mid,
4602         .check_message = smb2_check_message,
4603         .dump_detail = smb2_dump_detail,
4604         .clear_stats = smb2_clear_stats,
4605         .print_stats = smb2_print_stats,
4606         .is_oplock_break = smb2_is_valid_oplock_break,
4607         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4608         .downgrade_oplock = smb2_downgrade_oplock,
4609         .need_neg = smb2_need_neg,
4610         .negotiate = smb2_negotiate,
4611         .negotiate_wsize = smb2_negotiate_wsize,
4612         .negotiate_rsize = smb2_negotiate_rsize,
4613         .sess_setup = SMB2_sess_setup,
4614         .logoff = SMB2_logoff,
4615         .tree_connect = SMB2_tcon,
4616         .tree_disconnect = SMB2_tdis,
4617         .qfs_tcon = smb2_qfs_tcon,
4618         .is_path_accessible = smb2_is_path_accessible,
4619         .can_echo = smb2_can_echo,
4620         .echo = SMB2_echo,
4621         .query_path_info = smb2_query_path_info,
4622         .get_srv_inum = smb2_get_srv_inum,
4623         .query_file_info = smb2_query_file_info,
4624         .set_path_size = smb2_set_path_size,
4625         .set_file_size = smb2_set_file_size,
4626         .set_file_info = smb2_set_file_info,
4627         .set_compression = smb2_set_compression,
4628         .mkdir = smb2_mkdir,
4629         .mkdir_setinfo = smb2_mkdir_setinfo,
4630         .rmdir = smb2_rmdir,
4631         .unlink = smb2_unlink,
4632         .rename = smb2_rename_path,
4633         .create_hardlink = smb2_create_hardlink,
4634         .query_symlink = smb2_query_symlink,
4635         .query_mf_symlink = smb3_query_mf_symlink,
4636         .create_mf_symlink = smb3_create_mf_symlink,
4637         .open = smb2_open_file,
4638         .set_fid = smb2_set_fid,
4639         .close = smb2_close_file,
4640         .flush = smb2_flush_file,
4641         .async_readv = smb2_async_readv,
4642         .async_writev = smb2_async_writev,
4643         .sync_read = smb2_sync_read,
4644         .sync_write = smb2_sync_write,
4645         .query_dir_first = smb2_query_dir_first,
4646         .query_dir_next = smb2_query_dir_next,
4647         .close_dir = smb2_close_dir,
4648         .calc_smb_size = smb2_calc_size,
4649         .is_status_pending = smb2_is_status_pending,
4650         .is_session_expired = smb2_is_session_expired,
4651         .oplock_response = smb2_oplock_response,
4652         .queryfs = smb2_queryfs,
4653         .mand_lock = smb2_mand_lock,
4654         .mand_unlock_range = smb2_unlock_range,
4655         .push_mand_locks = smb2_push_mandatory_locks,
4656         .get_lease_key = smb2_get_lease_key,
4657         .set_lease_key = smb2_set_lease_key,
4658         .new_lease_key = smb2_new_lease_key,
4659         .calc_signature = smb2_calc_signature,
4660         .is_read_op = smb2_is_read_op,
4661         .set_oplock_level = smb2_set_oplock_level,
4662         .create_lease_buf = smb2_create_lease_buf,
4663         .parse_lease_buf = smb2_parse_lease_buf,
4664         .copychunk_range = smb2_copychunk_range,
4665         .wp_retry_size = smb2_wp_retry_size,
4666         .dir_needs_close = smb2_dir_needs_close,
4667         .get_dfs_refer = smb2_get_dfs_refer,
4668         .select_sectype = smb2_select_sectype,
4669 #ifdef CONFIG_CIFS_XATTR
4670         .query_all_EAs = smb2_query_eas,
4671         .set_EA = smb2_set_ea,
4672 #endif /* CIFS_XATTR */
4673         .get_acl = get_smb2_acl,
4674         .get_acl_by_fid = get_smb2_acl_by_fid,
4675         .set_acl = set_smb2_acl,
4676         .next_header = smb2_next_header,
4677         .ioctl_query_info = smb2_ioctl_query_info,
4678         .make_node = smb2_make_node,
4679         .fiemap = smb3_fiemap,
4680         .llseek = smb3_llseek,
4681 };
4682
4683 struct smb_version_operations smb21_operations = {
4684         .compare_fids = smb2_compare_fids,
4685         .setup_request = smb2_setup_request,
4686         .setup_async_request = smb2_setup_async_request,
4687         .check_receive = smb2_check_receive,
4688         .add_credits = smb2_add_credits,
4689         .set_credits = smb2_set_credits,
4690         .get_credits_field = smb2_get_credits_field,
4691         .get_credits = smb2_get_credits,
4692         .wait_mtu_credits = smb2_wait_mtu_credits,
4693         .adjust_credits = smb2_adjust_credits,
4694         .get_next_mid = smb2_get_next_mid,
4695         .revert_current_mid = smb2_revert_current_mid,
4696         .read_data_offset = smb2_read_data_offset,
4697         .read_data_length = smb2_read_data_length,
4698         .map_error = map_smb2_to_linux_error,
4699         .find_mid = smb2_find_mid,
4700         .check_message = smb2_check_message,
4701         .dump_detail = smb2_dump_detail,
4702         .clear_stats = smb2_clear_stats,
4703         .print_stats = smb2_print_stats,
4704         .is_oplock_break = smb2_is_valid_oplock_break,
4705         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4706         .downgrade_oplock = smb2_downgrade_oplock,
4707         .need_neg = smb2_need_neg,
4708         .negotiate = smb2_negotiate,
4709         .negotiate_wsize = smb2_negotiate_wsize,
4710         .negotiate_rsize = smb2_negotiate_rsize,
4711         .sess_setup = SMB2_sess_setup,
4712         .logoff = SMB2_logoff,
4713         .tree_connect = SMB2_tcon,
4714         .tree_disconnect = SMB2_tdis,
4715         .qfs_tcon = smb2_qfs_tcon,
4716         .is_path_accessible = smb2_is_path_accessible,
4717         .can_echo = smb2_can_echo,
4718         .echo = SMB2_echo,
4719         .query_path_info = smb2_query_path_info,
4720         .get_srv_inum = smb2_get_srv_inum,
4721         .query_file_info = smb2_query_file_info,
4722         .set_path_size = smb2_set_path_size,
4723         .set_file_size = smb2_set_file_size,
4724         .set_file_info = smb2_set_file_info,
4725         .set_compression = smb2_set_compression,
4726         .mkdir = smb2_mkdir,
4727         .mkdir_setinfo = smb2_mkdir_setinfo,
4728         .rmdir = smb2_rmdir,
4729         .unlink = smb2_unlink,
4730         .rename = smb2_rename_path,
4731         .create_hardlink = smb2_create_hardlink,
4732         .query_symlink = smb2_query_symlink,
4733         .query_mf_symlink = smb3_query_mf_symlink,
4734         .create_mf_symlink = smb3_create_mf_symlink,
4735         .open = smb2_open_file,
4736         .set_fid = smb2_set_fid,
4737         .close = smb2_close_file,
4738         .flush = smb2_flush_file,
4739         .async_readv = smb2_async_readv,
4740         .async_writev = smb2_async_writev,
4741         .sync_read = smb2_sync_read,
4742         .sync_write = smb2_sync_write,
4743         .query_dir_first = smb2_query_dir_first,
4744         .query_dir_next = smb2_query_dir_next,
4745         .close_dir = smb2_close_dir,
4746         .calc_smb_size = smb2_calc_size,
4747         .is_status_pending = smb2_is_status_pending,
4748         .is_session_expired = smb2_is_session_expired,
4749         .oplock_response = smb2_oplock_response,
4750         .queryfs = smb2_queryfs,
4751         .mand_lock = smb2_mand_lock,
4752         .mand_unlock_range = smb2_unlock_range,
4753         .push_mand_locks = smb2_push_mandatory_locks,
4754         .get_lease_key = smb2_get_lease_key,
4755         .set_lease_key = smb2_set_lease_key,
4756         .new_lease_key = smb2_new_lease_key,
4757         .calc_signature = smb2_calc_signature,
4758         .is_read_op = smb21_is_read_op,
4759         .set_oplock_level = smb21_set_oplock_level,
4760         .create_lease_buf = smb2_create_lease_buf,
4761         .parse_lease_buf = smb2_parse_lease_buf,
4762         .copychunk_range = smb2_copychunk_range,
4763         .wp_retry_size = smb2_wp_retry_size,
4764         .dir_needs_close = smb2_dir_needs_close,
4765         .enum_snapshots = smb3_enum_snapshots,
4766         .get_dfs_refer = smb2_get_dfs_refer,
4767         .select_sectype = smb2_select_sectype,
4768 #ifdef CONFIG_CIFS_XATTR
4769         .query_all_EAs = smb2_query_eas,
4770         .set_EA = smb2_set_ea,
4771 #endif /* CIFS_XATTR */
4772         .get_acl = get_smb2_acl,
4773         .get_acl_by_fid = get_smb2_acl_by_fid,
4774         .set_acl = set_smb2_acl,
4775         .next_header = smb2_next_header,
4776         .ioctl_query_info = smb2_ioctl_query_info,
4777         .make_node = smb2_make_node,
4778         .fiemap = smb3_fiemap,
4779         .llseek = smb3_llseek,
4780 };
4781
4782 struct smb_version_operations smb30_operations = {
4783         .compare_fids = smb2_compare_fids,
4784         .setup_request = smb2_setup_request,
4785         .setup_async_request = smb2_setup_async_request,
4786         .check_receive = smb2_check_receive,
4787         .add_credits = smb2_add_credits,
4788         .set_credits = smb2_set_credits,
4789         .get_credits_field = smb2_get_credits_field,
4790         .get_credits = smb2_get_credits,
4791         .wait_mtu_credits = smb2_wait_mtu_credits,
4792         .adjust_credits = smb2_adjust_credits,
4793         .get_next_mid = smb2_get_next_mid,
4794         .revert_current_mid = smb2_revert_current_mid,
4795         .read_data_offset = smb2_read_data_offset,
4796         .read_data_length = smb2_read_data_length,
4797         .map_error = map_smb2_to_linux_error,
4798         .find_mid = smb2_find_mid,
4799         .check_message = smb2_check_message,
4800         .dump_detail = smb2_dump_detail,
4801         .clear_stats = smb2_clear_stats,
4802         .print_stats = smb2_print_stats,
4803         .dump_share_caps = smb2_dump_share_caps,
4804         .is_oplock_break = smb2_is_valid_oplock_break,
4805         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4806         .downgrade_oplock = smb3_downgrade_oplock,
4807         .need_neg = smb2_need_neg,
4808         .negotiate = smb2_negotiate,
4809         .negotiate_wsize = smb3_negotiate_wsize,
4810         .negotiate_rsize = smb3_negotiate_rsize,
4811         .sess_setup = SMB2_sess_setup,
4812         .logoff = SMB2_logoff,
4813         .tree_connect = SMB2_tcon,
4814         .tree_disconnect = SMB2_tdis,
4815         .qfs_tcon = smb3_qfs_tcon,
4816         .is_path_accessible = smb2_is_path_accessible,
4817         .can_echo = smb2_can_echo,
4818         .echo = SMB2_echo,
4819         .query_path_info = smb2_query_path_info,
4820         .get_srv_inum = smb2_get_srv_inum,
4821         .query_file_info = smb2_query_file_info,
4822         .set_path_size = smb2_set_path_size,
4823         .set_file_size = smb2_set_file_size,
4824         .set_file_info = smb2_set_file_info,
4825         .set_compression = smb2_set_compression,
4826         .mkdir = smb2_mkdir,
4827         .mkdir_setinfo = smb2_mkdir_setinfo,
4828         .rmdir = smb2_rmdir,
4829         .unlink = smb2_unlink,
4830         .rename = smb2_rename_path,
4831         .create_hardlink = smb2_create_hardlink,
4832         .query_symlink = smb2_query_symlink,
4833         .query_mf_symlink = smb3_query_mf_symlink,
4834         .create_mf_symlink = smb3_create_mf_symlink,
4835         .open = smb2_open_file,
4836         .set_fid = smb2_set_fid,
4837         .close = smb2_close_file,
4838         .close_getattr = smb2_close_getattr,
4839         .flush = smb2_flush_file,
4840         .async_readv = smb2_async_readv,
4841         .async_writev = smb2_async_writev,
4842         .sync_read = smb2_sync_read,
4843         .sync_write = smb2_sync_write,
4844         .query_dir_first = smb2_query_dir_first,
4845         .query_dir_next = smb2_query_dir_next,
4846         .close_dir = smb2_close_dir,
4847         .calc_smb_size = smb2_calc_size,
4848         .is_status_pending = smb2_is_status_pending,
4849         .is_session_expired = smb2_is_session_expired,
4850         .oplock_response = smb2_oplock_response,
4851         .queryfs = smb2_queryfs,
4852         .mand_lock = smb2_mand_lock,
4853         .mand_unlock_range = smb2_unlock_range,
4854         .push_mand_locks = smb2_push_mandatory_locks,
4855         .get_lease_key = smb2_get_lease_key,
4856         .set_lease_key = smb2_set_lease_key,
4857         .new_lease_key = smb2_new_lease_key,
4858         .generate_signingkey = generate_smb30signingkey,
4859         .calc_signature = smb3_calc_signature,
4860         .set_integrity  = smb3_set_integrity,
4861         .is_read_op = smb21_is_read_op,
4862         .set_oplock_level = smb3_set_oplock_level,
4863         .create_lease_buf = smb3_create_lease_buf,
4864         .parse_lease_buf = smb3_parse_lease_buf,
4865         .copychunk_range = smb2_copychunk_range,
4866         .duplicate_extents = smb2_duplicate_extents,
4867         .validate_negotiate = smb3_validate_negotiate,
4868         .wp_retry_size = smb2_wp_retry_size,
4869         .dir_needs_close = smb2_dir_needs_close,
4870         .fallocate = smb3_fallocate,
4871         .enum_snapshots = smb3_enum_snapshots,
4872         .init_transform_rq = smb3_init_transform_rq,
4873         .is_transform_hdr = smb3_is_transform_hdr,
4874         .receive_transform = smb3_receive_transform,
4875         .get_dfs_refer = smb2_get_dfs_refer,
4876         .select_sectype = smb2_select_sectype,
4877 #ifdef CONFIG_CIFS_XATTR
4878         .query_all_EAs = smb2_query_eas,
4879         .set_EA = smb2_set_ea,
4880 #endif /* CIFS_XATTR */
4881         .get_acl = get_smb2_acl,
4882         .get_acl_by_fid = get_smb2_acl_by_fid,
4883         .set_acl = set_smb2_acl,
4884         .next_header = smb2_next_header,
4885         .ioctl_query_info = smb2_ioctl_query_info,
4886         .make_node = smb2_make_node,
4887         .fiemap = smb3_fiemap,
4888         .llseek = smb3_llseek,
4889 };
4890
4891 struct smb_version_operations smb311_operations = {
4892         .compare_fids = smb2_compare_fids,
4893         .setup_request = smb2_setup_request,
4894         .setup_async_request = smb2_setup_async_request,
4895         .check_receive = smb2_check_receive,
4896         .add_credits = smb2_add_credits,
4897         .set_credits = smb2_set_credits,
4898         .get_credits_field = smb2_get_credits_field,
4899         .get_credits = smb2_get_credits,
4900         .wait_mtu_credits = smb2_wait_mtu_credits,
4901         .adjust_credits = smb2_adjust_credits,
4902         .get_next_mid = smb2_get_next_mid,
4903         .revert_current_mid = smb2_revert_current_mid,
4904         .read_data_offset = smb2_read_data_offset,
4905         .read_data_length = smb2_read_data_length,
4906         .map_error = map_smb2_to_linux_error,
4907         .find_mid = smb2_find_mid,
4908         .check_message = smb2_check_message,
4909         .dump_detail = smb2_dump_detail,
4910         .clear_stats = smb2_clear_stats,
4911         .print_stats = smb2_print_stats,
4912         .dump_share_caps = smb2_dump_share_caps,
4913         .is_oplock_break = smb2_is_valid_oplock_break,
4914         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4915         .downgrade_oplock = smb3_downgrade_oplock,
4916         .need_neg = smb2_need_neg,
4917         .negotiate = smb2_negotiate,
4918         .negotiate_wsize = smb3_negotiate_wsize,
4919         .negotiate_rsize = smb3_negotiate_rsize,
4920         .sess_setup = SMB2_sess_setup,
4921         .logoff = SMB2_logoff,
4922         .tree_connect = SMB2_tcon,
4923         .tree_disconnect = SMB2_tdis,
4924         .qfs_tcon = smb3_qfs_tcon,
4925         .is_path_accessible = smb2_is_path_accessible,
4926         .can_echo = smb2_can_echo,
4927         .echo = SMB2_echo,
4928         .query_path_info = smb2_query_path_info,
4929         .get_srv_inum = smb2_get_srv_inum,
4930         .query_file_info = smb2_query_file_info,
4931         .set_path_size = smb2_set_path_size,
4932         .set_file_size = smb2_set_file_size,
4933         .set_file_info = smb2_set_file_info,
4934         .set_compression = smb2_set_compression,
4935         .mkdir = smb2_mkdir,
4936         .mkdir_setinfo = smb2_mkdir_setinfo,
4937         .posix_mkdir = smb311_posix_mkdir,
4938         .rmdir = smb2_rmdir,
4939         .unlink = smb2_unlink,
4940         .rename = smb2_rename_path,
4941         .create_hardlink = smb2_create_hardlink,
4942         .query_symlink = smb2_query_symlink,
4943         .query_mf_symlink = smb3_query_mf_symlink,
4944         .create_mf_symlink = smb3_create_mf_symlink,
4945         .open = smb2_open_file,
4946         .set_fid = smb2_set_fid,
4947         .close = smb2_close_file,
4948         .close_getattr = smb2_close_getattr,
4949         .flush = smb2_flush_file,
4950         .async_readv = smb2_async_readv,
4951         .async_writev = smb2_async_writev,
4952         .sync_read = smb2_sync_read,
4953         .sync_write = smb2_sync_write,
4954         .query_dir_first = smb2_query_dir_first,
4955         .query_dir_next = smb2_query_dir_next,
4956         .close_dir = smb2_close_dir,
4957         .calc_smb_size = smb2_calc_size,
4958         .is_status_pending = smb2_is_status_pending,
4959         .is_session_expired = smb2_is_session_expired,
4960         .oplock_response = smb2_oplock_response,
4961         .queryfs = smb311_queryfs,
4962         .mand_lock = smb2_mand_lock,
4963         .mand_unlock_range = smb2_unlock_range,
4964         .push_mand_locks = smb2_push_mandatory_locks,
4965         .get_lease_key = smb2_get_lease_key,
4966         .set_lease_key = smb2_set_lease_key,
4967         .new_lease_key = smb2_new_lease_key,
4968         .generate_signingkey = generate_smb311signingkey,
4969         .calc_signature = smb3_calc_signature,
4970         .set_integrity  = smb3_set_integrity,
4971         .is_read_op = smb21_is_read_op,
4972         .set_oplock_level = smb3_set_oplock_level,
4973         .create_lease_buf = smb3_create_lease_buf,
4974         .parse_lease_buf = smb3_parse_lease_buf,
4975         .copychunk_range = smb2_copychunk_range,
4976         .duplicate_extents = smb2_duplicate_extents,
4977 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
4978         .wp_retry_size = smb2_wp_retry_size,
4979         .dir_needs_close = smb2_dir_needs_close,
4980         .fallocate = smb3_fallocate,
4981         .enum_snapshots = smb3_enum_snapshots,
4982         .init_transform_rq = smb3_init_transform_rq,
4983         .is_transform_hdr = smb3_is_transform_hdr,
4984         .receive_transform = smb3_receive_transform,
4985         .get_dfs_refer = smb2_get_dfs_refer,
4986         .select_sectype = smb2_select_sectype,
4987 #ifdef CONFIG_CIFS_XATTR
4988         .query_all_EAs = smb2_query_eas,
4989         .set_EA = smb2_set_ea,
4990 #endif /* CIFS_XATTR */
4991         .get_acl = get_smb2_acl,
4992         .get_acl_by_fid = get_smb2_acl_by_fid,
4993         .set_acl = set_smb2_acl,
4994         .next_header = smb2_next_header,
4995         .ioctl_query_info = smb2_ioctl_query_info,
4996         .make_node = smb2_make_node,
4997         .fiemap = smb3_fiemap,
4998         .llseek = smb3_llseek,
4999 };
5000
5001 struct smb_version_values smb20_values = {
5002         .version_string = SMB20_VERSION_STRING,
5003         .protocol_id = SMB20_PROT_ID,
5004         .req_capabilities = 0, /* MBZ */
5005         .large_lock_type = 0,
5006         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5007         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5008         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5009         .header_size = sizeof(struct smb2_sync_hdr),
5010         .header_preamble_size = 0,
5011         .max_header_size = MAX_SMB2_HDR_SIZE,
5012         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5013         .lock_cmd = SMB2_LOCK,
5014         .cap_unix = 0,
5015         .cap_nt_find = SMB2_NT_FIND,
5016         .cap_large_files = SMB2_LARGE_FILES,
5017         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5018         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5019         .create_lease_size = sizeof(struct create_lease),
5020 };
5021
5022 struct smb_version_values smb21_values = {
5023         .version_string = SMB21_VERSION_STRING,
5024         .protocol_id = SMB21_PROT_ID,
5025         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5026         .large_lock_type = 0,
5027         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5028         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5029         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5030         .header_size = sizeof(struct smb2_sync_hdr),
5031         .header_preamble_size = 0,
5032         .max_header_size = MAX_SMB2_HDR_SIZE,
5033         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5034         .lock_cmd = SMB2_LOCK,
5035         .cap_unix = 0,
5036         .cap_nt_find = SMB2_NT_FIND,
5037         .cap_large_files = SMB2_LARGE_FILES,
5038         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5039         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5040         .create_lease_size = sizeof(struct create_lease),
5041 };
5042
5043 struct smb_version_values smb3any_values = {
5044         .version_string = SMB3ANY_VERSION_STRING,
5045         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5046         .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,
5047         .large_lock_type = 0,
5048         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5049         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5050         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5051         .header_size = sizeof(struct smb2_sync_hdr),
5052         .header_preamble_size = 0,
5053         .max_header_size = MAX_SMB2_HDR_SIZE,
5054         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5055         .lock_cmd = SMB2_LOCK,
5056         .cap_unix = 0,
5057         .cap_nt_find = SMB2_NT_FIND,
5058         .cap_large_files = SMB2_LARGE_FILES,
5059         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5060         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5061         .create_lease_size = sizeof(struct create_lease_v2),
5062 };
5063
5064 struct smb_version_values smbdefault_values = {
5065         .version_string = SMBDEFAULT_VERSION_STRING,
5066         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5067         .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,
5068         .large_lock_type = 0,
5069         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5070         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5071         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5072         .header_size = sizeof(struct smb2_sync_hdr),
5073         .header_preamble_size = 0,
5074         .max_header_size = MAX_SMB2_HDR_SIZE,
5075         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5076         .lock_cmd = SMB2_LOCK,
5077         .cap_unix = 0,
5078         .cap_nt_find = SMB2_NT_FIND,
5079         .cap_large_files = SMB2_LARGE_FILES,
5080         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5081         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5082         .create_lease_size = sizeof(struct create_lease_v2),
5083 };
5084
5085 struct smb_version_values smb30_values = {
5086         .version_string = SMB30_VERSION_STRING,
5087         .protocol_id = SMB30_PROT_ID,
5088         .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,
5089         .large_lock_type = 0,
5090         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5091         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5092         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5093         .header_size = sizeof(struct smb2_sync_hdr),
5094         .header_preamble_size = 0,
5095         .max_header_size = MAX_SMB2_HDR_SIZE,
5096         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5097         .lock_cmd = SMB2_LOCK,
5098         .cap_unix = 0,
5099         .cap_nt_find = SMB2_NT_FIND,
5100         .cap_large_files = SMB2_LARGE_FILES,
5101         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5102         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5103         .create_lease_size = sizeof(struct create_lease_v2),
5104 };
5105
5106 struct smb_version_values smb302_values = {
5107         .version_string = SMB302_VERSION_STRING,
5108         .protocol_id = SMB302_PROT_ID,
5109         .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,
5110         .large_lock_type = 0,
5111         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5112         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5113         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5114         .header_size = sizeof(struct smb2_sync_hdr),
5115         .header_preamble_size = 0,
5116         .max_header_size = MAX_SMB2_HDR_SIZE,
5117         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5118         .lock_cmd = SMB2_LOCK,
5119         .cap_unix = 0,
5120         .cap_nt_find = SMB2_NT_FIND,
5121         .cap_large_files = SMB2_LARGE_FILES,
5122         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5123         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5124         .create_lease_size = sizeof(struct create_lease_v2),
5125 };
5126
5127 struct smb_version_values smb311_values = {
5128         .version_string = SMB311_VERSION_STRING,
5129         .protocol_id = SMB311_PROT_ID,
5130         .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,
5131         .large_lock_type = 0,
5132         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5133         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5134         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5135         .header_size = sizeof(struct smb2_sync_hdr),
5136         .header_preamble_size = 0,
5137         .max_header_size = MAX_SMB2_HDR_SIZE,
5138         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5139         .lock_cmd = SMB2_LOCK,
5140         .cap_unix = 0,
5141         .cap_nt_find = SMB2_NT_FIND,
5142         .cap_large_files = SMB2_LARGE_FILES,
5143         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5144         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5145         .create_lease_size = sizeof(struct create_lease_v2),
5146 };