fs/cifs/smb2ops.c

   1 /*
   2  *  SMB2 version specific operations
   3  *
   4  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   5  *
   6  *  This library is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License v2 as published
   8  *  by the Free Software Foundation.
   9  *
  10  *  This library is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  13  *  the GNU Lesser General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU Lesser General Public License
  16  *  along with this library; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18  */
  19
  20 #include <linux/pagemap.h>
  21 #include <linux/vfs.h>
  22 #include <linux/falloc.h>
  23 #include <linux/scatterlist.h>
  24 #include <linux/uuid.h>
  25 #include <crypto/aead.h>
  26 #include "cifsglob.h"
  27 #include "smb2pdu.h"
  28 #include "smb2proto.h"
  29 #include "cifsproto.h"
  30 #include "cifs_debug.h"
  31 #include "cifs_unicode.h"
  32 #include "smb2status.h"
  33 #include "smb2glob.h"
  34 #include "cifs_ioctl.h"
  35 #include "smbdirect.h"
  36
  37 static int
  38 change_conf(struct TCP_Server_Info *server)
  39 {
  40         server->credits += server->echo_credits + server->oplock_credits;
  41         server->oplock_credits = server->echo_credits = 0;
  42         switch (server->credits) {
  43         case 0:
  44                 return -1;
  45         case 1:
  46                 server->echoes = false;
  47                 server->oplocks = false;
  48                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
  49                 break;
  50         case 2:
  51                 server->echoes = true;
  52                 server->oplocks = false;
  53                 server->echo_credits = 1;
  54                 cifs_dbg(FYI, "disabling oplocks\n");
  55                 break;
  56         default:
  57                 server->echoes = true;
  58                 if (enable_oplocks) {
  59                         server->oplocks = true;
  60                         server->oplock_credits = 1;
  61                 } else
  62                         server->oplocks = false;
  63
  64                 server->echo_credits = 1;
  65         }
  66         server->credits -= server->echo_credits + server->oplock_credits;
  67         return 0;
  68 }
  69
  70 static void
  71 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  72                  const int optype)
  73 {
  74         int *val, rc = 0;
  75         spin_lock(&server->req_lock);
  76         val = server->ops->get_credits_field(server, optype);
  77         *val += add;
  78         if (*val > 65000) {
  79                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  80                 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  81         }
  82         server->in_flight--;
  83         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  84                 rc = change_conf(server);
  85         /*
  86          * Sometimes server returns 0 credits on oplock break ack - we need to
  87          * rebalance credits in this case.
  88          */
  89         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  90                  server->oplocks) {
  91                 if (server->credits > 1) {
  92                         server->credits--;
  93                         server->oplock_credits++;
  94                 }
  95         }
  96         spin_unlock(&server->req_lock);
  97         wake_up(&server->request_q);
  98         if (rc)
  99                 cifs_reconnect(server);
 100 }
 101
 102 static void
 103 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 104 {
 105         spin_lock(&server->req_lock);
 106         server->credits = val;
 107         spin_unlock(&server->req_lock);
 108 }
 109
 110 static int *
 111 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 112 {
 113         switch (optype) {
 114         case CIFS_ECHO_OP:
 115                 return &server->echo_credits;
 116         case CIFS_OBREAK_OP:
 117                 return &server->oplock_credits;
 118         default:
 119                 return &server->credits;
 120         }
 121 }
 122
 123 static unsigned int
 124 smb2_get_credits(struct mid_q_entry *mid)
 125 {
 126         struct smb2_sync_hdr *shdr = get_sync_hdr(mid->resp_buf);
 127
 128         return le16_to_cpu(shdr->CreditRequest);
 129 }
 130
 131 static int
 132 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 133                       unsigned int *num, unsigned int *credits)
 134 {
 135         int rc = 0;
 136         unsigned int scredits;
 137
 138         spin_lock(&server->req_lock);
 139         while (1) {
 140                 if (server->credits <= 0) {
 141                         spin_unlock(&server->req_lock);
 142                         cifs_num_waiters_inc(server);
 143                         rc = wait_event_killable(server->request_q,
 144                                         has_credits(server, &server->credits));
 145                         cifs_num_waiters_dec(server);
 146                         if (rc)
 147                                 return rc;
 148                         spin_lock(&server->req_lock);
 149                 } else {
 150                         if (server->tcpStatus == CifsExiting) {
 151                                 spin_unlock(&server->req_lock);
 152                                 return -ENOENT;
 153                         }
 154
 155                         scredits = server->credits;
 156                         /* can deadlock with reopen */
 157                         if (scredits == 1) {
 158                                 *num = SMB2_MAX_BUFFER_SIZE;
 159                                 *credits = 0;
 160                                 break;
 161                         }
 162
 163                         /* leave one credit for a possible reopen */
 164                         scredits--;
 165                         *num = min_t(unsigned int, size,
 166                                      scredits * SMB2_MAX_BUFFER_SIZE);
 167
 168                         *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 169                         server->credits -= *credits;
 170                         server->in_flight++;
 171                         break;
 172                 }
 173         }
 174         spin_unlock(&server->req_lock);
 175         return rc;
 176 }
 177
 178 static __u64
 179 smb2_get_next_mid(struct TCP_Server_Info *server)
 180 {
 181         __u64 mid;
 182         /* for SMB2 we need the current value */
 183         spin_lock(&GlobalMid_Lock);
 184         mid = server->CurrentMid++;
 185         spin_unlock(&GlobalMid_Lock);
 186         return mid;
 187 }
 188
 189 static struct mid_q_entry *
 190 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 191 {
 192         struct mid_q_entry *mid;
 193         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
 194         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 195
 196         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 197                 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
 198                 return NULL;
 199         }
 200
 201         spin_lock(&GlobalMid_Lock);
 202         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 203                 if ((mid->mid == wire_mid) &&
 204                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 205                     (mid->command == shdr->Command)) {
 206                         spin_unlock(&GlobalMid_Lock);
 207                         return mid;
 208                 }
 209         }
 210         spin_unlock(&GlobalMid_Lock);
 211         return NULL;
 212 }
 213
 214 static void
 215 smb2_dump_detail(void *buf)
 216 {
 217 #ifdef CONFIG_CIFS_DEBUG2
 218         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
 219
 220         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 221                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 222                  shdr->ProcessId);
 223         cifs_dbg(VFS, "smb buf %p len %u\n", buf, smb2_calc_size(buf));
 224 #endif
 225 }
 226
 227 static bool
 228 smb2_need_neg(struct TCP_Server_Info *server)
 229 {
 230         return server->max_read == 0;
 231 }
 232
 233 static int
 234 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 235 {
 236         int rc;
 237         ses->server->CurrentMid = 0;
 238         rc = SMB2_negotiate(xid, ses);
 239         /* BB we probably don't need to retry with modern servers */
 240         if (rc == -EAGAIN)
 241                 rc = -EHOSTDOWN;
 242         return rc;
 243 }
 244
 245 static unsigned int
 246 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 247 {
 248         struct TCP_Server_Info *server = tcon->ses->server;
 249         unsigned int wsize;
 250
 251         /* start with specified wsize, or default */
 252         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 253         wsize = min_t(unsigned int, wsize, server->max_write);
 254 #ifdef CONFIG_CIFS_SMB_DIRECT
 255         if (server->rdma)
 256                 wsize = min_t(unsigned int,
 257                                 wsize, server->smbd_conn->max_readwrite_size);
 258 #endif
 259         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 260                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 261
 262         return wsize;
 263 }
 264
 265 static unsigned int
 266 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 267 {
 268         struct TCP_Server_Info *server = tcon->ses->server;
 269         unsigned int rsize;
 270
 271         /* start with specified rsize, or default */
 272         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 273         rsize = min_t(unsigned int, rsize, server->max_read);
 274 #ifdef CONFIG_CIFS_SMB_DIRECT
 275         if (server->rdma)
 276                 rsize = min_t(unsigned int,
 277                                 rsize, server->smbd_conn->max_readwrite_size);
 278 #endif
 279
 280         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 281                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 282
 283         return rsize;
 284 }
 285
 286 #ifdef CONFIG_CIFS_STATS2
 287 static int
 288 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 289 {
 290         int rc;
 291         unsigned int ret_data_len = 0;
 292         struct network_interface_info_ioctl_rsp *out_buf;
 293
 294         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 295                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 296                         NULL /* no data input */, 0 /* no data input */,
 297                         (char **)&out_buf, &ret_data_len);
 298         if (rc != 0)
 299                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 300         else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
 301                 cifs_dbg(VFS, "server returned bad net interface info buf\n");
 302                 rc = -EINVAL;
 303         } else {
 304                 /* Dump info on first interface */
 305                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 306                         le32_to_cpu(out_buf->Capability));
 307                 cifs_dbg(FYI, "Link Speed %lld\n",
 308                         le64_to_cpu(out_buf->LinkSpeed));
 309         }
 310         kfree(out_buf);
 311         return rc;
 312 }
 313 #endif /* STATS2 */
 314
 315 static void
 316 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 317 {
 318         int rc;
 319         __le16 srch_path = 0; /* Null - open root of share */
 320         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 321         struct cifs_open_parms oparms;
 322         struct cifs_fid fid;
 323
 324         oparms.tcon = tcon;
 325         oparms.desired_access = FILE_READ_ATTRIBUTES;
 326         oparms.disposition = FILE_OPEN;
 327         oparms.create_options = 0;
 328         oparms.fid = &fid;
 329         oparms.reconnect = false;
 330
 331         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 332         if (rc)
 333                 return;
 334
 335 #ifdef CONFIG_CIFS_STATS2
 336         SMB3_request_interfaces(xid, tcon);
 337 #endif /* STATS2 */
 338
 339         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 340                         FS_ATTRIBUTE_INFORMATION);
 341         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 342                         FS_DEVICE_INFORMATION);
 343         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 344                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 345         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 346         return;
 347 }
 348
 349 static void
 350 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 351 {
 352         int rc;
 353         __le16 srch_path = 0; /* Null - open root of share */
 354         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 355         struct cifs_open_parms oparms;
 356         struct cifs_fid fid;
 357
 358         oparms.tcon = tcon;
 359         oparms.desired_access = FILE_READ_ATTRIBUTES;
 360         oparms.disposition = FILE_OPEN;
 361         oparms.create_options = 0;
 362         oparms.fid = &fid;
 363         oparms.reconnect = false;
 364
 365         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 366         if (rc)
 367                 return;
 368
 369         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 370                         FS_ATTRIBUTE_INFORMATION);
 371         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 372                         FS_DEVICE_INFORMATION);
 373         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 374         return;
 375 }
 376
 377 static int
 378 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 379                         struct cifs_sb_info *cifs_sb, const char *full_path)
 380 {
 381         int rc;
 382         __le16 *utf16_path;
 383         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 384         struct cifs_open_parms oparms;
 385         struct cifs_fid fid;
 386
 387         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 388         if (!utf16_path)
 389                 return -ENOMEM;
 390
 391         oparms.tcon = tcon;
 392         oparms.desired_access = FILE_READ_ATTRIBUTES;
 393         oparms.disposition = FILE_OPEN;
 394         oparms.create_options = 0;
 395         oparms.fid = &fid;
 396         oparms.reconnect = false;
 397
 398         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 399         if (rc) {
 400                 kfree(utf16_path);
 401                 return rc;
 402         }
 403
 404         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 405         kfree(utf16_path);
 406         return rc;
 407 }
 408
 409 static int
 410 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 411                   struct cifs_sb_info *cifs_sb, const char *full_path,
 412                   u64 *uniqueid, FILE_ALL_INFO *data)
 413 {
 414         *uniqueid = le64_to_cpu(data->IndexNumber);
 415         return 0;
 416 }
 417
 418 static int
 419 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 420                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 421 {
 422         int rc;
 423         struct smb2_file_all_info *smb2_data;
 424
 425         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 426                             GFP_KERNEL);
 427         if (smb2_data == NULL)
 428                 return -ENOMEM;
 429
 430         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 431                              smb2_data);
 432         if (!rc)
 433                 move_smb2_info_to_cifs(data, smb2_data);
 434         kfree(smb2_data);
 435         return rc;
 436 }
 437
 438 #ifdef CONFIG_CIFS_XATTR
 439 static ssize_t
 440 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 441                      struct smb2_file_full_ea_info *src, size_t src_size,
 442                      const unsigned char *ea_name)
 443 {
 444         int rc = 0;
 445         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 446         char *name, *value;
 447         size_t name_len, value_len, user_name_len;
 448
 449         while (src_size > 0) {
 450                 name = &src->ea_data[0];
 451                 name_len = (size_t)src->ea_name_length;
 452                 value = &src->ea_data[src->ea_name_length + 1];
 453                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 454
 455                 if (name_len == 0) {
 456                         break;
 457                 }
 458
 459                 if (src_size < 8 + name_len + 1 + value_len) {
 460                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 461                         rc = -EIO;
 462                         goto out;
 463                 }
 464
 465                 if (ea_name) {
 466                         if (ea_name_len == name_len &&
 467                             memcmp(ea_name, name, name_len) == 0) {
 468                                 rc = value_len;
 469                                 if (dst_size == 0)
 470                                         goto out;
 471                                 if (dst_size < value_len) {
 472                                         rc = -ERANGE;
 473                                         goto out;
 474                                 }
 475                                 memcpy(dst, value, value_len);
 476                                 goto out;
 477                         }
 478                 } else {
 479                         /* 'user.' plus a terminating null */
 480                         user_name_len = 5 + 1 + name_len;
 481
 482                         rc += user_name_len;
 483
 484                         if (dst_size >= user_name_len) {
 485                                 dst_size -= user_name_len;
 486                                 memcpy(dst, "user.", 5);
 487                                 dst += 5;
 488                                 memcpy(dst, src->ea_data, name_len);
 489                                 dst += name_len;
 490                                 *dst = 0;
 491                                 ++dst;
 492                         } else if (dst_size == 0) {
 493                                 /* skip copy - calc size only */
 494                         } else {
 495                                 /* stop before overrun buffer */
 496                                 rc = -ERANGE;
 497                                 break;
 498                         }
 499                 }
 500
 501                 if (!src->next_entry_offset)
 502                         break;
 503
 504                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
 505                         /* stop before overrun buffer */
 506                         rc = -ERANGE;
 507                         break;
 508                 }
 509                 src_size -= le32_to_cpu(src->next_entry_offset);
 510                 src = (void *)((char *)src +
 511                                le32_to_cpu(src->next_entry_offset));
 512         }
 513
 514         /* didn't find the named attribute */
 515         if (ea_name)
 516                 rc = -ENODATA;
 517
 518 out:
 519         return (ssize_t)rc;
 520 }
 521
 522 static ssize_t
 523 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 524                const unsigned char *path, const unsigned char *ea_name,
 525                char *ea_data, size_t buf_size,
 526                struct cifs_sb_info *cifs_sb)
 527 {
 528         int rc;
 529         __le16 *utf16_path;
 530         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 531         struct cifs_open_parms oparms;
 532         struct cifs_fid fid;
 533         struct smb2_file_full_ea_info *smb2_data;
 534         int ea_buf_size = SMB2_MIN_EA_BUF;
 535
 536         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 537         if (!utf16_path)
 538                 return -ENOMEM;
 539
 540         oparms.tcon = tcon;
 541         oparms.desired_access = FILE_READ_EA;
 542         oparms.disposition = FILE_OPEN;
 543         oparms.create_options = 0;
 544         oparms.fid = &fid;
 545         oparms.reconnect = false;
 546
 547         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 548         kfree(utf16_path);
 549         if (rc) {
 550                 cifs_dbg(FYI, "open failed rc=%d\n", rc);
 551                 return rc;
 552         }
 553
 554         while (1) {
 555                 smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
 556                 if (smb2_data == NULL) {
 557                         SMB2_close(xid, tcon, fid.persistent_fid,
 558                                    fid.volatile_fid);
 559                         return -ENOMEM;
 560                 }
 561
 562                 rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
 563                                     fid.volatile_fid,
 564                                     ea_buf_size, smb2_data);
 565
 566                 if (rc != -E2BIG)
 567                         break;
 568
 569                 kfree(smb2_data);
 570                 ea_buf_size <<= 1;
 571
 572                 if (ea_buf_size > SMB2_MAX_EA_BUF) {
 573                         cifs_dbg(VFS, "EA size is too large\n");
 574                         SMB2_close(xid, tcon, fid.persistent_fid,
 575                                    fid.volatile_fid);
 576                         return -ENOMEM;
 577                 }
 578         }
 579
 580         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 581
 582         if (!rc)
 583                 rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
 584                                           SMB2_MAX_EA_BUF, ea_name);
 585
 586         kfree(smb2_data);
 587         return rc;
 588 }
 589
 590
 591 static int
 592 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
 593             const char *path, const char *ea_name, const void *ea_value,
 594             const __u16 ea_value_len, const struct nls_table *nls_codepage,
 595             struct cifs_sb_info *cifs_sb)
 596 {
 597         int rc;
 598         __le16 *utf16_path;
 599         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 600         struct cifs_open_parms oparms;
 601         struct cifs_fid fid;
 602         struct smb2_file_full_ea_info *ea;
 603         int ea_name_len = strlen(ea_name);
 604         int len;
 605
 606         if (ea_name_len > 255)
 607                 return -EINVAL;
 608
 609         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 610         if (!utf16_path)
 611                 return -ENOMEM;
 612
 613         oparms.tcon = tcon;
 614         oparms.desired_access = FILE_WRITE_EA;
 615         oparms.disposition = FILE_OPEN;
 616         oparms.create_options = 0;
 617         oparms.fid = &fid;
 618         oparms.reconnect = false;
 619
 620         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 621         kfree(utf16_path);
 622         if (rc) {
 623                 cifs_dbg(FYI, "open failed rc=%d\n", rc);
 624                 return rc;
 625         }
 626
 627         len = sizeof(ea) + ea_name_len + ea_value_len + 1;
 628         ea = kzalloc(len, GFP_KERNEL);
 629         if (ea == NULL) {
 630                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 631                 return -ENOMEM;
 632         }
 633
 634         ea->ea_name_length = ea_name_len;
 635         ea->ea_value_length = cpu_to_le16(ea_value_len);
 636         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
 637         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
 638
 639         rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
 640                          len);
 641         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 642
 643         return rc;
 644 }
 645 #endif
 646
 647 static bool
 648 smb2_can_echo(struct TCP_Server_Info *server)
 649 {
 650         return server->echoes;
 651 }
 652
 653 static void
 654 smb2_clear_stats(struct cifs_tcon *tcon)
 655 {
 656 #ifdef CONFIG_CIFS_STATS
 657         int i;
 658         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 659                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 660                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 661         }
 662 #endif
 663 }
 664
 665 static void
 666 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 667 {
 668         seq_puts(m, "\n\tShare Capabilities:");
 669         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 670                 seq_puts(m, " DFS,");
 671         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 672                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 673         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 674                 seq_puts(m, " SCALEOUT,");
 675         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 676                 seq_puts(m, " CLUSTER,");
 677         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 678                 seq_puts(m, " ASYMMETRIC,");
 679         if (tcon->capabilities == 0)
 680                 seq_puts(m, " None");
 681         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 682                 seq_puts(m, " Aligned,");
 683         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 684                 seq_puts(m, " Partition Aligned,");
 685         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 686                 seq_puts(m, " SSD,");
 687         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 688                 seq_puts(m, " TRIM-support,");
 689
 690         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 691         if (tcon->perf_sector_size)
 692                 seq_printf(m, "\tOptimal sector size: 0x%x",
 693                            tcon->perf_sector_size);
 694 }
 695
 696 static void
 697 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 698 {
 699 #ifdef CONFIG_CIFS_STATS
 700         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 701         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 702         seq_printf(m, "\nNegotiates: %d sent %d failed",
 703                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 704                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 705         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 706                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 707                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 708         seq_printf(m, "\nLogoffs: %d sent %d failed",
 709                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 710                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 711         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 712                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 713                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 714         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 715                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 716                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 717         seq_printf(m, "\nCreates: %d sent %d failed",
 718                    atomic_read(&sent[SMB2_CREATE_HE]),
 719                    atomic_read(&failed[SMB2_CREATE_HE]));
 720         seq_printf(m, "\nCloses: %d sent %d failed",
 721                    atomic_read(&sent[SMB2_CLOSE_HE]),
 722                    atomic_read(&failed[SMB2_CLOSE_HE]));
 723         seq_printf(m, "\nFlushes: %d sent %d failed",
 724                    atomic_read(&sent[SMB2_FLUSH_HE]),
 725                    atomic_read(&failed[SMB2_FLUSH_HE]));
 726         seq_printf(m, "\nReads: %d sent %d failed",
 727                    atomic_read(&sent[SMB2_READ_HE]),
 728                    atomic_read(&failed[SMB2_READ_HE]));
 729         seq_printf(m, "\nWrites: %d sent %d failed",
 730                    atomic_read(&sent[SMB2_WRITE_HE]),
 731                    atomic_read(&failed[SMB2_WRITE_HE]));
 732         seq_printf(m, "\nLocks: %d sent %d failed",
 733                    atomic_read(&sent[SMB2_LOCK_HE]),
 734                    atomic_read(&failed[SMB2_LOCK_HE]));
 735         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 736                    atomic_read(&sent[SMB2_IOCTL_HE]),
 737                    atomic_read(&failed[SMB2_IOCTL_HE]));
 738         seq_printf(m, "\nCancels: %d sent %d failed",
 739                    atomic_read(&sent[SMB2_CANCEL_HE]),
 740                    atomic_read(&failed[SMB2_CANCEL_HE]));
 741         seq_printf(m, "\nEchos: %d sent %d failed",
 742                    atomic_read(&sent[SMB2_ECHO_HE]),
 743                    atomic_read(&failed[SMB2_ECHO_HE]));
 744         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 745                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 746                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 747         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 748                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 749                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 750         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 751                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 752                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 753         seq_printf(m, "\nSetInfos: %d sent %d failed",
 754                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 755                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 756         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 757                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 758                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 759 #endif
 760 }
 761
 762 static void
 763 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 764 {
 765         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
 766         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 767
 768         cfile->fid.persistent_fid = fid->persistent_fid;
 769         cfile->fid.volatile_fid = fid->volatile_fid;
 770         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 771                                       &fid->purge_cache);
 772         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 773         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
 774 }
 775
 776 static void
 777 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 778                 struct cifs_fid *fid)
 779 {
 780         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 781 }
 782
 783 static int
 784 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 785                      u64 persistent_fid, u64 volatile_fid,
 786                      struct copychunk_ioctl *pcchunk)
 787 {
 788         int rc;
 789         unsigned int ret_data_len;
 790         struct resume_key_req *res_key;
 791
 792         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 793                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 794                         NULL, 0 /* no input */,
 795                         (char **)&res_key, &ret_data_len);
 796
 797         if (rc) {
 798                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 799                 goto req_res_key_exit;
 800         }
 801         if (ret_data_len < sizeof(struct resume_key_req)) {
 802                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 803                 rc = -EINVAL;
 804                 goto req_res_key_exit;
 805         }
 806         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 807
 808 req_res_key_exit:
 809         kfree(res_key);
 810         return rc;
 811 }
 812
 813 static ssize_t
 814 smb2_copychunk_range(const unsigned int xid,
 815                         struct cifsFileInfo *srcfile,
 816                         struct cifsFileInfo *trgtfile, u64 src_off,
 817                         u64 len, u64 dest_off)
 818 {
 819         int rc;
 820         unsigned int ret_data_len;
 821         struct copychunk_ioctl *pcchunk;
 822         struct copychunk_ioctl_rsp *retbuf = NULL;
 823         struct cifs_tcon *tcon;
 824         int chunks_copied = 0;
 825         bool chunk_sizes_updated = false;
 826         ssize_t bytes_written, total_bytes_written = 0;
 827
 828         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 829
 830         if (pcchunk == NULL)
 831                 return -ENOMEM;
 832
 833         cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
 834         /* Request a key from the server to identify the source of the copy */
 835         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 836                                 srcfile->fid.persistent_fid,
 837                                 srcfile->fid.volatile_fid, pcchunk);
 838
 839         /* Note: request_res_key sets res_key null only if rc !=0 */
 840         if (rc)
 841                 goto cchunk_out;
 842
 843         /* For now array only one chunk long, will make more flexible later */
 844         pcchunk->ChunkCount = cpu_to_le32(1);
 845         pcchunk->Reserved = 0;
 846         pcchunk->Reserved2 = 0;
 847
 848         tcon = tlink_tcon(trgtfile->tlink);
 849
 850         while (len > 0) {
 851                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 852                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 853                 pcchunk->Length =
 854                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 855
 856                 /* Request server copy to target from src identified by key */
 857                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 858                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 859                         true /* is_fsctl */, (char *)pcchunk,
 860                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 861                         &ret_data_len);
 862                 if (rc == 0) {
 863                         if (ret_data_len !=
 864                                         sizeof(struct copychunk_ioctl_rsp)) {
 865                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 866                                 rc = -EIO;
 867                                 goto cchunk_out;
 868                         }
 869                         if (retbuf->TotalBytesWritten == 0) {
 870                                 cifs_dbg(FYI, "no bytes copied\n");
 871                                 rc = -EIO;
 872                                 goto cchunk_out;
 873                         }
 874                         /*
 875                          * Check if server claimed to write more than we asked
 876                          */
 877                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 878                             le32_to_cpu(pcchunk->Length)) {
 879                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 880                                 rc = -EIO;
 881                                 goto cchunk_out;
 882                         }
 883                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 884                                 cifs_dbg(VFS, "invalid num chunks written\n");
 885                                 rc = -EIO;
 886                                 goto cchunk_out;
 887                         }
 888                         chunks_copied++;
 889
 890                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
 891                         src_off += bytes_written;
 892                         dest_off += bytes_written;
 893                         len -= bytes_written;
 894                         total_bytes_written += bytes_written;
 895
 896                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
 897                                 le32_to_cpu(retbuf->ChunksWritten),
 898                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 899                                 bytes_written);
 900                 } else if (rc == -EINVAL) {
 901                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 902                                 goto cchunk_out;
 903
 904                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 905                                 le32_to_cpu(retbuf->ChunksWritten),
 906                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 907                                 le32_to_cpu(retbuf->TotalBytesWritten));
 908
 909                         /*
 910                          * Check if this is the first request using these sizes,
 911                          * (ie check if copy succeed once with original sizes
 912                          * and check if the server gave us different sizes after
 913                          * we already updated max sizes on previous request).
 914                          * if not then why is the server returning an error now
 915                          */
 916                         if ((chunks_copied != 0) || chunk_sizes_updated)
 917                                 goto cchunk_out;
 918
 919                         /* Check that server is not asking us to grow size */
 920                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 921                                         tcon->max_bytes_chunk)
 922                                 tcon->max_bytes_chunk =
 923                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 924                         else
 925                                 goto cchunk_out; /* server gave us bogus size */
 926
 927                         /* No need to change MaxChunks since already set to 1 */
 928                         chunk_sizes_updated = true;
 929                 } else
 930                         goto cchunk_out;
 931         }
 932
 933 cchunk_out:
 934         kfree(pcchunk);
 935         kfree(retbuf);
 936         if (rc)
 937                 return rc;
 938         else
 939                 return total_bytes_written;
 940 }
 941
 942 static int
 943 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 944                 struct cifs_fid *fid)
 945 {
 946         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 947 }
 948
 949 static unsigned int
 950 smb2_read_data_offset(char *buf)
 951 {
 952         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 953         return rsp->DataOffset;
 954 }
 955
 956 static unsigned int
 957 smb2_read_data_length(char *buf, bool in_remaining)
 958 {
 959         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 960
 961         if (in_remaining)
 962                 return le32_to_cpu(rsp->DataRemaining);
 963
 964         return le32_to_cpu(rsp->DataLength);
 965 }
 966
 967
 968 static int
 969 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
 970                struct cifs_io_parms *parms, unsigned int *bytes_read,
 971                char **buf, int *buf_type)
 972 {
 973         parms->persistent_fid = pfid->persistent_fid;
 974         parms->volatile_fid = pfid->volatile_fid;
 975         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 976 }
 977
 978 static int
 979 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
 980                 struct cifs_io_parms *parms, unsigned int *written,
 981                 struct kvec *iov, unsigned long nr_segs)
 982 {
 983
 984         parms->persistent_fid = pfid->persistent_fid;
 985         parms->volatile_fid = pfid->volatile_fid;
 986         return SMB2_write(xid, parms, written, iov, nr_segs);
 987 }
 988
 989 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
 990 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 991                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
 992 {
 993         struct cifsInodeInfo *cifsi;
 994         int rc;
 995
 996         cifsi = CIFS_I(inode);
 997
 998         /* if file already sparse don't bother setting sparse again */
 999         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1000                 return true; /* already sparse */
1001
1002         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1003                 return true; /* already not sparse */
1004
1005         /*
1006          * Can't check for sparse support on share the usual way via the
1007          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1008          * since Samba server doesn't set the flag on the share, yet
1009          * supports the set sparse FSCTL and returns sparse correctly
1010          * in the file attributes. If we fail setting sparse though we
1011          * mark that server does not support sparse files for this share
1012          * to avoid repeatedly sending the unsupported fsctl to server
1013          * if the file is repeatedly extended.
1014          */
1015         if (tcon->broken_sparse_sup)
1016                 return false;
1017
1018         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1019                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1020                         true /* is_fctl */,
1021                         &setsparse, 1, NULL, NULL);
1022         if (rc) {
1023                 tcon->broken_sparse_sup = true;
1024                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1025                 return false;
1026         }
1027
1028         if (setsparse)
1029                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1030         else
1031                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1032
1033         return true;
1034 }
1035
1036 static int
1037 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1038                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1039 {
1040         __le64 eof = cpu_to_le64(size);
1041         struct inode *inode;
1042
1043         /*
1044          * If extending file more than one page make sparse. Many Linux fs
1045          * make files sparse by default when extending via ftruncate
1046          */
1047         inode = d_inode(cfile->dentry);
1048
1049         if (!set_alloc && (size > inode->i_size + 8192)) {
1050                 __u8 set_sparse = 1;
1051
1052                 /* whether set sparse succeeds or not, extend the file */
1053                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1054         }
1055
1056         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1057                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
1058 }
1059
1060 static int
1061 smb2_duplicate_extents(const unsigned int xid,
1062                         struct cifsFileInfo *srcfile,
1063                         struct cifsFileInfo *trgtfile, u64 src_off,
1064                         u64 len, u64 dest_off)
1065 {
1066         int rc;
1067         unsigned int ret_data_len;
1068         struct duplicate_extents_to_file dup_ext_buf;
1069         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1070
1071         /* server fileays advertise duplicate extent support with this flag */
1072         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1073              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1074                 return -EOPNOTSUPP;
1075
1076         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1077         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1078         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1079         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1080         dup_ext_buf.ByteCount = cpu_to_le64(len);
1081         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1082                 src_off, dest_off, len);
1083
1084         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1085         if (rc)
1086                 goto duplicate_extents_out;
1087
1088         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1089                         trgtfile->fid.volatile_fid,
1090                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1091                         true /* is_fsctl */,
1092                         (char *)&dup_ext_buf,
1093                         sizeof(struct duplicate_extents_to_file),
1094                         NULL,
1095                         &ret_data_len);
1096
1097         if (ret_data_len > 0)
1098                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1099
1100 duplicate_extents_out:
1101         return rc;
1102 }
1103
1104 static int
1105 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1106                    struct cifsFileInfo *cfile)
1107 {
1108         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1109                             cfile->fid.volatile_fid);
1110 }
1111
1112 static int
1113 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1114                    struct cifsFileInfo *cfile)
1115 {
1116         struct fsctl_set_integrity_information_req integr_info;
1117         unsigned int ret_data_len;
1118
1119         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1120         integr_info.Flags = 0;
1121         integr_info.Reserved = 0;
1122
1123         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1124                         cfile->fid.volatile_fid,
1125                         FSCTL_SET_INTEGRITY_INFORMATION,
1126                         true /* is_fsctl */,
1127                         (char *)&integr_info,
1128                         sizeof(struct fsctl_set_integrity_information_req),
1129                         NULL,
1130                         &ret_data_len);
1131
1132 }
1133
1134 static int
1135 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1136                    struct cifsFileInfo *cfile, void __user *ioc_buf)
1137 {
1138         char *retbuf = NULL;
1139         unsigned int ret_data_len = 0;
1140         int rc;
1141         struct smb_snapshot_array snapshot_in;
1142
1143         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1144                         cfile->fid.volatile_fid,
1145                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1146                         true /* is_fsctl */,
1147                         NULL, 0 /* no input data */,
1148                         (char **)&retbuf,
1149                         &ret_data_len);
1150         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1151                         rc, ret_data_len);
1152         if (rc)
1153                 return rc;
1154
1155         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1156                 /* Fixup buffer */
1157                 if (copy_from_user(&snapshot_in, ioc_buf,
1158                     sizeof(struct smb_snapshot_array))) {
1159                         rc = -EFAULT;
1160                         kfree(retbuf);
1161                         return rc;
1162                 }
1163                 if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
1164                         rc = -ERANGE;
1165                         kfree(retbuf);
1166                         return rc;
1167                 }
1168
1169                 if (ret_data_len > snapshot_in.snapshot_array_size)
1170                         ret_data_len = snapshot_in.snapshot_array_size;
1171
1172                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1173                         rc = -EFAULT;
1174         }
1175
1176         kfree(retbuf);
1177         return rc;
1178 }
1179
1180 static int
1181 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1182                      const char *path, struct cifs_sb_info *cifs_sb,
1183                      struct cifs_fid *fid, __u16 search_flags,
1184                      struct cifs_search_info *srch_inf)
1185 {
1186         __le16 *utf16_path;
1187         int rc;
1188         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1189         struct cifs_open_parms oparms;
1190
1191         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1192         if (!utf16_path)
1193                 return -ENOMEM;
1194
1195         oparms.tcon = tcon;
1196         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1197         oparms.disposition = FILE_OPEN;
1198         oparms.create_options = 0;
1199         oparms.fid = fid;
1200         oparms.reconnect = false;
1201
1202         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1203         kfree(utf16_path);
1204         if (rc) {
1205                 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
1206                 return rc;
1207         }
1208
1209         srch_inf->entries_in_buffer = 0;
1210         srch_inf->index_of_last_entry = 0;
1211
1212         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1213                                   fid->volatile_fid, 0, srch_inf);
1214         if (rc) {
1215                 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1216                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1217         }
1218         return rc;
1219 }
1220
1221 static int
1222 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1223                     struct cifs_fid *fid, __u16 search_flags,
1224                     struct cifs_search_info *srch_inf)
1225 {
1226         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1227                                     fid->volatile_fid, 0, srch_inf);
1228 }
1229
1230 static int
1231 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1232                struct cifs_fid *fid)
1233 {
1234         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1235 }
1236
1237 /*
1238 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1239 * the number of credits and return true. Otherwise - return false.
1240 */
1241 static bool
1242 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1243 {
1244         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1245
1246         if (shdr->Status != STATUS_PENDING)
1247                 return false;
1248
1249         if (!length) {
1250                 spin_lock(&server->req_lock);
1251                 server->credits += le16_to_cpu(shdr->CreditRequest);
1252                 spin_unlock(&server->req_lock);
1253                 wake_up(&server->request_q);
1254         }
1255
1256         return true;
1257 }
1258
1259 static bool
1260 smb2_is_session_expired(char *buf)
1261 {
1262         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1263
1264         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED)
1265                 return false;
1266
1267         cifs_dbg(FYI, "Session expired\n");
1268         return true;
1269 }
1270
1271 static int
1272 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1273                      struct cifsInodeInfo *cinode)
1274 {
1275         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1276                 return SMB2_lease_break(0, tcon, cinode->lease_key,
1277                                         smb2_get_lease_state(cinode));
1278
1279         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1280                                  fid->volatile_fid,
1281                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
1282 }
1283
1284 static int
1285 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1286              struct kstatfs *buf)
1287 {
1288         int rc;
1289         __le16 srch_path = 0; /* Null - open root of share */
1290         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1291         struct cifs_open_parms oparms;
1292         struct cifs_fid fid;
1293
1294         oparms.tcon = tcon;
1295         oparms.desired_access = FILE_READ_ATTRIBUTES;
1296         oparms.disposition = FILE_OPEN;
1297         oparms.create_options = 0;
1298         oparms.fid = &fid;
1299         oparms.reconnect = false;
1300
1301         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1302         if (rc)
1303                 return rc;
1304         buf->f_type = SMB2_MAGIC_NUMBER;
1305         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1306                            buf);
1307         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1308         return rc;
1309 }
1310
1311 static bool
1312 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1313 {
1314         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1315                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1316 }
1317
1318 static int
1319 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1320                __u64 length, __u32 type, int lock, int unlock, bool wait)
1321 {
1322         if (unlock && !lock)
1323                 type = SMB2_LOCKFLAG_UNLOCK;
1324         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1325                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1326                          current->tgid, length, offset, type, wait);
1327 }
1328
1329 static void
1330 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1331 {
1332         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1333 }
1334
1335 static void
1336 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1337 {
1338         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1339 }
1340
1341 static void
1342 smb2_new_lease_key(struct cifs_fid *fid)
1343 {
1344         generate_random_uuid(fid->lease_key);
1345 }
1346
1347 static int
1348 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1349                    const char *search_name,
1350                    struct dfs_info3_param **target_nodes,
1351                    unsigned int *num_of_nodes,
1352                    const struct nls_table *nls_codepage, int remap)
1353 {
1354         int rc;
1355         __le16 *utf16_path = NULL;
1356         int utf16_path_len = 0;
1357         struct cifs_tcon *tcon;
1358         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1359         struct get_dfs_referral_rsp *dfs_rsp = NULL;
1360         u32 dfs_req_size = 0, dfs_rsp_size = 0;
1361
1362         cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1363
1364         /*
1365          * Try to use the IPC tcon, otherwise just use any
1366          */
1367         tcon = ses->tcon_ipc;
1368         if (tcon == NULL) {
1369                 spin_lock(&cifs_tcp_ses_lock);
1370                 tcon = list_first_entry_or_null(&ses->tcon_list,
1371                                                 struct cifs_tcon,
1372                                                 tcon_list);
1373                 if (tcon)
1374                         tcon->tc_count++;
1375                 spin_unlock(&cifs_tcp_ses_lock);
1376         }
1377
1378         if (tcon == NULL) {
1379                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1380                          ses);
1381                 rc = -ENOTCONN;
1382                 goto out;
1383         }
1384
1385         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1386                                            &utf16_path_len,
1387                                            nls_codepage, remap);
1388         if (!utf16_path) {
1389                 rc = -ENOMEM;
1390                 goto out;
1391         }
1392
1393         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1394         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1395         if (!dfs_req) {
1396                 rc = -ENOMEM;
1397                 goto out;
1398         }
1399
1400         /* Highest DFS referral version understood */
1401         dfs_req->MaxReferralLevel = DFS_VERSION;
1402
1403         /* Path to resolve in an UTF-16 null-terminated string */
1404         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1405
1406         do {
1407                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1408                                 FSCTL_DFS_GET_REFERRALS,
1409                                 true /* is_fsctl */,
1410                                 (char *)dfs_req, dfs_req_size,
1411                                 (char **)&dfs_rsp, &dfs_rsp_size);
1412         } while (rc == -EAGAIN);
1413
1414         if (rc) {
1415                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
1416                         cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
1417                 goto out;
1418         }
1419
1420         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1421                                  num_of_nodes, target_nodes,
1422                                  nls_codepage, remap, search_name,
1423                                  true /* is_unicode */);
1424         if (rc) {
1425                 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1426                 goto out;
1427         }
1428
1429  out:
1430         if (tcon && !tcon->ipc) {
1431                 /* ipc tcons are not refcounted */
1432                 spin_lock(&cifs_tcp_ses_lock);
1433                 tcon->tc_count--;
1434                 spin_unlock(&cifs_tcp_ses_lock);
1435         }
1436         kfree(utf16_path);
1437         kfree(dfs_req);
1438         kfree(dfs_rsp);
1439         return rc;
1440 }
1441 #define SMB2_SYMLINK_STRUCT_SIZE \
1442         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1443
1444 static int
1445 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1446                    const char *full_path, char **target_path,
1447                    struct cifs_sb_info *cifs_sb)
1448 {
1449         int rc;
1450         __le16 *utf16_path;
1451         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1452         struct cifs_open_parms oparms;
1453         struct cifs_fid fid;
1454         struct kvec err_iov = {NULL, 0};
1455         struct smb2_err_rsp *err_buf;
1456         struct smb2_symlink_err_rsp *symlink;
1457         unsigned int sub_len;
1458         unsigned int sub_offset;
1459         unsigned int print_len;
1460         unsigned int print_offset;
1461         struct cifs_ses *ses = tcon->ses;
1462         struct TCP_Server_Info *server = ses->server;
1463
1464         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1465
1466         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1467         if (!utf16_path)
1468                 return -ENOMEM;
1469
1470         oparms.tcon = tcon;
1471         oparms.desired_access = FILE_READ_ATTRIBUTES;
1472         oparms.disposition = FILE_OPEN;
1473         oparms.create_options = 0;
1474         oparms.fid = &fid;
1475         oparms.reconnect = false;
1476
1477         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov);
1478
1479         if (!rc || !err_iov.iov_base) {
1480                 kfree(utf16_path);
1481                 return -ENOENT;
1482         }
1483
1484         err_buf = err_iov.iov_base;
1485         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1486             err_iov.iov_len + server->vals->header_preamble_size < SMB2_SYMLINK_STRUCT_SIZE) {
1487                 kfree(utf16_path);
1488                 return -ENOENT;
1489         }
1490
1491         /* open must fail on symlink - reset rc */
1492         rc = 0;
1493         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1494         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1495         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1496         print_len = le16_to_cpu(symlink->PrintNameLength);
1497         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1498
1499         if (err_iov.iov_len + server->vals->header_preamble_size <
1500                         SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1501                 kfree(utf16_path);
1502                 return -ENOENT;
1503         }
1504
1505         if (err_iov.iov_len + server->vals->header_preamble_size <
1506                         SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1507                 kfree(utf16_path);
1508                 return -ENOENT;
1509         }
1510
1511         *target_path = cifs_strndup_from_utf16(
1512                                 (char *)symlink->PathBuffer + sub_offset,
1513                                 sub_len, true, cifs_sb->local_nls);
1514         if (!(*target_path)) {
1515                 kfree(utf16_path);
1516                 return -ENOMEM;
1517         }
1518         convert_delimiter(*target_path, '/');
1519         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1520         kfree(utf16_path);
1521         return rc;
1522 }
1523
1524 #ifdef CONFIG_CIFS_ACL
1525 static struct cifs_ntsd *
1526 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
1527                 const struct cifs_fid *cifsfid, u32 *pacllen)
1528 {
1529         struct cifs_ntsd *pntsd = NULL;
1530         unsigned int xid;
1531         int rc = -EOPNOTSUPP;
1532         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1533
1534         if (IS_ERR(tlink))
1535                 return ERR_CAST(tlink);
1536
1537         xid = get_xid();
1538         cifs_dbg(FYI, "trying to get acl\n");
1539
1540         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
1541                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
1542         free_xid(xid);
1543
1544         cifs_put_tlink(tlink);
1545
1546         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1547         if (rc)
1548                 return ERR_PTR(rc);
1549         return pntsd;
1550
1551 }
1552
1553 static struct cifs_ntsd *
1554 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
1555                 const char *path, u32 *pacllen)
1556 {
1557         struct cifs_ntsd *pntsd = NULL;
1558         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1559         unsigned int xid;
1560         int rc;
1561         struct cifs_tcon *tcon;
1562         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1563         struct cifs_fid fid;
1564         struct cifs_open_parms oparms;
1565         __le16 *utf16_path;
1566
1567         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
1568         if (IS_ERR(tlink))
1569                 return ERR_CAST(tlink);
1570
1571         tcon = tlink_tcon(tlink);
1572         xid = get_xid();
1573
1574         if (backup_cred(cifs_sb))
1575                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1576         else
1577                 oparms.create_options = 0;
1578
1579         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1580         if (!utf16_path)
1581                 return ERR_PTR(-ENOMEM);
1582
1583         oparms.tcon = tcon;
1584         oparms.desired_access = READ_CONTROL;
1585         oparms.disposition = FILE_OPEN;
1586         oparms.fid = &fid;
1587         oparms.reconnect = false;
1588
1589         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1590         kfree(utf16_path);
1591         if (!rc) {
1592                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1593                             fid.volatile_fid, (void **)&pntsd, pacllen);
1594                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1595         }
1596
1597         cifs_put_tlink(tlink);
1598         free_xid(xid);
1599
1600         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1601         if (rc)
1602                 return ERR_PTR(rc);
1603         return pntsd;
1604 }
1605
1606 #ifdef CONFIG_CIFS_ACL
1607 static int
1608 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
1609                 struct inode *inode, const char *path, int aclflag)
1610 {
1611         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1612         unsigned int xid;
1613         int rc, access_flags = 0;
1614         struct cifs_tcon *tcon;
1615         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1616         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1617         struct cifs_fid fid;
1618         struct cifs_open_parms oparms;
1619         __le16 *utf16_path;
1620
1621         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
1622         if (IS_ERR(tlink))
1623                 return PTR_ERR(tlink);
1624
1625         tcon = tlink_tcon(tlink);
1626         xid = get_xid();
1627
1628         if (backup_cred(cifs_sb))
1629                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1630         else
1631                 oparms.create_options = 0;
1632
1633         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
1634                 access_flags = WRITE_OWNER;
1635         else
1636                 access_flags = WRITE_DAC;
1637
1638         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1639         if (!utf16_path)
1640                 return -ENOMEM;
1641
1642         oparms.tcon = tcon;
1643         oparms.desired_access = access_flags;
1644         oparms.disposition = FILE_OPEN;
1645         oparms.path = path;
1646         oparms.fid = &fid;
1647         oparms.reconnect = false;
1648
1649         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1650         kfree(utf16_path);
1651         if (!rc) {
1652                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1653                             fid.volatile_fid, pnntsd, acllen, aclflag);
1654                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1655         }
1656
1657         cifs_put_tlink(tlink);
1658         free_xid(xid);
1659         return rc;
1660 }
1661 #endif /* CIFS_ACL */
1662
1663 /* Retrieve an ACL from the server */
1664 static struct cifs_ntsd *
1665 get_smb2_acl(struct cifs_sb_info *cifs_sb,
1666                                       struct inode *inode, const char *path,
1667                                       u32 *pacllen)
1668 {
1669         struct cifs_ntsd *pntsd = NULL;
1670         struct cifsFileInfo *open_file = NULL;
1671
1672         if (inode)
1673                 open_file = find_readable_file(CIFS_I(inode), true);
1674         if (!open_file)
1675                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
1676
1677         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
1678         cifsFileInfo_put(open_file);
1679         return pntsd;
1680 }
1681 #endif
1682
1683 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1684                             loff_t offset, loff_t len, bool keep_size)
1685 {
1686         struct inode *inode;
1687         struct cifsInodeInfo *cifsi;
1688         struct cifsFileInfo *cfile = file->private_data;
1689         struct file_zero_data_information fsctl_buf;
1690         long rc;
1691         unsigned int xid;
1692
1693         xid = get_xid();
1694
1695         inode = d_inode(cfile->dentry);
1696         cifsi = CIFS_I(inode);
1697
1698         /* if file not oplocked can't be sure whether asking to extend size */
1699         if (!CIFS_CACHE_READ(cifsi))
1700                 if (keep_size == false)
1701                         return -EOPNOTSUPP;
1702
1703         /*
1704          * Must check if file sparse since fallocate -z (zero range) assumes
1705          * non-sparse allocation
1706          */
1707         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1708                 return -EOPNOTSUPP;
1709
1710         /*
1711          * need to make sure we are not asked to extend the file since the SMB3
1712          * fsctl does not change the file size. In the future we could change
1713          * this to zero the first part of the range then set the file size
1714          * which for a non sparse file would zero the newly extended range
1715          */
1716         if (keep_size == false)
1717                 if (i_size_read(inode) < offset + len)
1718                         return -EOPNOTSUPP;
1719
1720         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1721
1722         fsctl_buf.FileOffset = cpu_to_le64(offset);
1723         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1724
1725         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1726                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1727                         true /* is_fctl */, (char *)&fsctl_buf,
1728                         sizeof(struct file_zero_data_information), NULL, NULL);
1729         free_xid(xid);
1730         return rc;
1731 }
1732
1733 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1734                             loff_t offset, loff_t len)
1735 {
1736         struct inode *inode;
1737         struct cifsInodeInfo *cifsi;
1738         struct cifsFileInfo *cfile = file->private_data;
1739         struct file_zero_data_information fsctl_buf;
1740         long rc;
1741         unsigned int xid;
1742         __u8 set_sparse = 1;
1743
1744         xid = get_xid();
1745
1746         inode = d_inode(cfile->dentry);
1747         cifsi = CIFS_I(inode);
1748
1749         /* Need to make file sparse, if not already, before freeing range. */
1750         /* Consider adding equivalent for compressed since it could also work */
1751         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1752                 return -EOPNOTSUPP;
1753
1754         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1755
1756         fsctl_buf.FileOffset = cpu_to_le64(offset);
1757         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1758
1759         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1760                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1761                         true /* is_fctl */, (char *)&fsctl_buf,
1762                         sizeof(struct file_zero_data_information), NULL, NULL);
1763         free_xid(xid);
1764         return rc;
1765 }
1766
1767 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1768                             loff_t off, loff_t len, bool keep_size)
1769 {
1770         struct inode *inode;
1771         struct cifsInodeInfo *cifsi;
1772         struct cifsFileInfo *cfile = file->private_data;
1773         long rc = -EOPNOTSUPP;
1774         unsigned int xid;
1775
1776         xid = get_xid();
1777
1778         inode = d_inode(cfile->dentry);
1779         cifsi = CIFS_I(inode);
1780
1781         /* if file not oplocked can't be sure whether asking to extend size */
1782         if (!CIFS_CACHE_READ(cifsi))
1783                 if (keep_size == false)
1784                         return -EOPNOTSUPP;
1785
1786         /*
1787          * Files are non-sparse by default so falloc may be a no-op
1788          * Must check if file sparse. If not sparse, and not extending
1789          * then no need to do anything since file already allocated
1790          */
1791         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1792                 if (keep_size == true)
1793                         return 0;
1794                 /* check if extending file */
1795                 else if (i_size_read(inode) >= off + len)
1796                         /* not extending file and already not sparse */
1797                         return 0;
1798                 /* BB: in future add else clause to extend file */
1799                 else
1800                         return -EOPNOTSUPP;
1801         }
1802
1803         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1804                 /*
1805                  * Check if falloc starts within first few pages of file
1806                  * and ends within a few pages of the end of file to
1807                  * ensure that most of file is being forced to be
1808                  * fallocated now. If so then setting whole file sparse
1809                  * ie potentially making a few extra pages at the beginning
1810                  * or end of the file non-sparse via set_sparse is harmless.
1811                  */
1812                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1813                         return -EOPNOTSUPP;
1814
1815                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1816         }
1817         /* BB: else ... in future add code to extend file and set sparse */
1818
1819
1820         free_xid(xid);
1821         return rc;
1822 }
1823
1824
1825 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1826                            loff_t off, loff_t len)
1827 {
1828         /* KEEP_SIZE already checked for by do_fallocate */
1829         if (mode & FALLOC_FL_PUNCH_HOLE)
1830                 return smb3_punch_hole(file, tcon, off, len);
1831         else if (mode & FALLOC_FL_ZERO_RANGE) {
1832                 if (mode & FALLOC_FL_KEEP_SIZE)
1833                         return smb3_zero_range(file, tcon, off, len, true);
1834                 return smb3_zero_range(file, tcon, off, len, false);
1835         } else if (mode == FALLOC_FL_KEEP_SIZE)
1836                 return smb3_simple_falloc(file, tcon, off, len, true);
1837         else if (mode == 0)
1838                 return smb3_simple_falloc(file, tcon, off, len, false);
1839
1840         return -EOPNOTSUPP;
1841 }
1842
1843 static void
1844 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1845                         struct cifsInodeInfo *cinode, bool set_level2)
1846 {
1847         if (set_level2)
1848                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1849                                                 0, NULL);
1850         else
1851                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1852 }
1853
1854 static void
1855 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1856                       unsigned int epoch, bool *purge_cache)
1857 {
1858         oplock &= 0xFF;
1859         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1860                 return;
1861         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1862                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1863                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1864                          &cinode->vfs_inode);
1865         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1866                 cinode->oplock = CIFS_CACHE_RW_FLG;
1867                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1868                          &cinode->vfs_inode);
1869         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1870                 cinode->oplock = CIFS_CACHE_READ_FLG;
1871                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1872                          &cinode->vfs_inode);
1873         } else
1874                 cinode->oplock = 0;
1875 }
1876
1877 static void
1878 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1879                        unsigned int epoch, bool *purge_cache)
1880 {
1881         char message[5] = {0};
1882
1883         oplock &= 0xFF;
1884         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1885                 return;
1886
1887         cinode->oplock = 0;
1888         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1889                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1890                 strcat(message, "R");
1891         }
1892         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1893                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1894                 strcat(message, "H");
1895         }
1896         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1897                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1898                 strcat(message, "W");
1899         }
1900         if (!cinode->oplock)
1901                 strcat(message, "None");
1902         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1903                  &cinode->vfs_inode);
1904 }
1905
1906 static void
1907 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1908                       unsigned int epoch, bool *purge_cache)
1909 {
1910         unsigned int old_oplock = cinode->oplock;
1911
1912         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1913
1914         if (purge_cache) {
1915                 *purge_cache = false;
1916                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1917                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1918                             (epoch - cinode->epoch > 0))
1919                                 *purge_cache = true;
1920                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1921                                  (epoch - cinode->epoch > 1))
1922                                 *purge_cache = true;
1923                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1924                                  (epoch - cinode->epoch > 1))
1925                                 *purge_cache = true;
1926                         else if (cinode->oplock == 0 &&
1927                                  (epoch - cinode->epoch > 0))
1928                                 *purge_cache = true;
1929                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1930                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1931                             (epoch - cinode->epoch > 0))
1932                                 *purge_cache = true;
1933                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1934                                  (epoch - cinode->epoch > 1))
1935                                 *purge_cache = true;
1936                 }
1937                 cinode->epoch = epoch;
1938         }
1939 }
1940
1941 static bool
1942 smb2_is_read_op(__u32 oplock)
1943 {
1944         return oplock == SMB2_OPLOCK_LEVEL_II;
1945 }
1946
1947 static bool
1948 smb21_is_read_op(__u32 oplock)
1949 {
1950         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1951                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1952 }
1953
1954 static __le32
1955 map_oplock_to_lease(u8 oplock)
1956 {
1957         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1958                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1959         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1960                 return SMB2_LEASE_READ_CACHING;
1961         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1962                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1963                        SMB2_LEASE_WRITE_CACHING;
1964         return 0;
1965 }
1966
1967 static char *
1968 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1969 {
1970         struct create_lease *buf;
1971
1972         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1973         if (!buf)
1974                 return NULL;
1975
1976         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1977         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1978         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1979
1980         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1981                                         (struct create_lease, lcontext));
1982         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1983         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1984                                 (struct create_lease, Name));
1985         buf->ccontext.NameLength = cpu_to_le16(4);
1986         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1987         buf->Name[0] = 'R';
1988         buf->Name[1] = 'q';
1989         buf->Name[2] = 'L';
1990         buf->Name[3] = 's';
1991         return (char *)buf;
1992 }
1993
1994 static char *
1995 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1996 {
1997         struct create_lease_v2 *buf;
1998
1999         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2000         if (!buf)
2001                 return NULL;
2002
2003         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
2004         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
2005         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2006
2007         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2008                                         (struct create_lease_v2, lcontext));
2009         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2010         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2011                                 (struct create_lease_v2, Name));
2012         buf->ccontext.NameLength = cpu_to_le16(4);
2013         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2014         buf->Name[0] = 'R';
2015         buf->Name[1] = 'q';
2016         buf->Name[2] = 'L';
2017         buf->Name[3] = 's';
2018         return (char *)buf;
2019 }
2020
2021 static __u8
2022 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
2023 {
2024         struct create_lease *lc = (struct create_lease *)buf;
2025
2026         *epoch = 0; /* not used */
2027         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2028                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2029         return le32_to_cpu(lc->lcontext.LeaseState);
2030 }
2031
2032 static __u8
2033 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
2034 {
2035         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2036
2037         *epoch = le16_to_cpu(lc->lcontext.Epoch);
2038         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2039                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2040         return le32_to_cpu(lc->lcontext.LeaseState);
2041 }
2042
2043 static unsigned int
2044 smb2_wp_retry_size(struct inode *inode)
2045 {
2046         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2047                      SMB2_MAX_BUFFER_SIZE);
2048 }
2049
2050 static bool
2051 smb2_dir_needs_close(struct cifsFileInfo *cfile)
2052 {
2053         return !cfile->invalidHandle;
2054 }
2055
2056 static void
2057 fill_transform_hdr(struct TCP_Server_Info *server,
2058                    struct smb2_transform_hdr *tr_hdr, struct smb_rqst *old_rq)
2059 {
2060         struct smb2_sync_hdr *shdr =
2061                         (struct smb2_sync_hdr *)old_rq->rq_iov[1].iov_base;
2062         unsigned int orig_len = get_rfc1002_length(old_rq->rq_iov[0].iov_base);
2063
2064         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2065         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2066         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2067         tr_hdr->Flags = cpu_to_le16(0x01);
2068         get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2069         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
2070         inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - server->vals->header_preamble_size);
2071         inc_rfc1001_len(tr_hdr, orig_len);
2072 }
2073
2074 /* We can not use the normal sg_set_buf() as we will sometimes pass a
2075  * stack object as buf.
2076  */
2077 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2078                                    unsigned int buflen)
2079 {
2080         sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
2081 }
2082
2083 static struct scatterlist *
2084 init_sg(struct smb_rqst *rqst, u8 *sign)
2085 {
2086         unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
2087         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
2088         struct scatterlist *sg;
2089         unsigned int i;
2090         unsigned int j;
2091
2092         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2093         if (!sg)
2094                 return NULL;
2095
2096         sg_init_table(sg, sg_len);
2097         smb2_sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 24, assoc_data_len);
2098         for (i = 1; i < rqst->rq_nvec; i++)
2099                 smb2_sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
2100                                                 rqst->rq_iov[i].iov_len);
2101         for (j = 0; i < sg_len - 1; i++, j++) {
2102                 unsigned int len = (j < rqst->rq_npages - 1) ? rqst->rq_pagesz
2103                                                         : rqst->rq_tailsz;
2104                 sg_set_page(&sg[i], rqst->rq_pages[j], len, 0);
2105         }
2106         smb2_sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
2107         return sg;
2108 }
2109
2110 static int
2111 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2112 {
2113         struct cifs_ses *ses;
2114         u8 *ses_enc_key;
2115
2116         spin_lock(&cifs_tcp_ses_lock);
2117         list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2118                 if (ses->Suid != ses_id)
2119                         continue;
2120                 ses_enc_key = enc ? ses->smb3encryptionkey :
2121                                                         ses->smb3decryptionkey;
2122                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2123                 spin_unlock(&cifs_tcp_ses_lock);
2124                 return 0;
2125         }
2126         spin_unlock(&cifs_tcp_ses_lock);
2127
2128         return 1;
2129 }
2130 /*
2131  * Encrypt or decrypt @rqst message. @rqst has the following format:
2132  * iov[0] - transform header (associate data),
2133  * iov[1-N] and pages - data to encrypt.
2134  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
2135  * untouched.
2136  */
2137 static int
2138 crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
2139 {
2140         struct smb2_transform_hdr *tr_hdr =
2141                         (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
2142         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20 - server->vals->header_preamble_size;
2143         int rc = 0;
2144         struct scatterlist *sg;
2145         u8 sign[SMB2_SIGNATURE_SIZE] = {};
2146         u8 key[SMB3_SIGN_KEY_SIZE];
2147         struct aead_request *req;
2148         char *iv;
2149         unsigned int iv_len;
2150         DECLARE_CRYPTO_WAIT(wait);
2151         struct crypto_aead *tfm;
2152         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2153
2154         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2155         if (rc) {
2156                 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2157                          enc ? "en" : "de");
2158                 return 0;
2159         }
2160
2161         rc = smb3_crypto_aead_allocate(server);
2162         if (rc) {
2163                 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2164                 return rc;
2165         }
2166
2167         tfm = enc ? server->secmech.ccmaesencrypt :
2168                                                 server->secmech.ccmaesdecrypt;
2169         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
2170         if (rc) {
2171                 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2172                 return rc;
2173         }
2174
2175         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2176         if (rc) {
2177                 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2178                 return rc;
2179         }
2180
2181         req = aead_request_alloc(tfm, GFP_KERNEL);
2182         if (!req) {
2183                 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2184                 return -ENOMEM;
2185         }
2186
2187         if (!enc) {
2188                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2189                 crypt_len += SMB2_SIGNATURE_SIZE;
2190         }
2191
2192         sg = init_sg(rqst, sign);
2193         if (!sg) {
2194                 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2195                 rc = -ENOMEM;
2196                 goto free_req;
2197         }
2198
2199         iv_len = crypto_aead_ivsize(tfm);
2200         iv = kzalloc(iv_len, GFP_KERNEL);
2201         if (!iv) {
2202                 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
2203                 rc = -ENOMEM;
2204                 goto free_sg;
2205         }
2206         iv[0] = 3;
2207         memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2208
2209         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2210         aead_request_set_ad(req, assoc_data_len);
2211
2212         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
2213                                   crypto_req_done, &wait);
2214
2215         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2216                                 : crypto_aead_decrypt(req), &wait);
2217
2218         if (!rc && enc)
2219                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2220
2221         kfree(iv);
2222 free_sg:
2223         kfree(sg);
2224 free_req:
2225         kfree(req);
2226         return rc;
2227 }
2228
2229 static int
2230 smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
2231                        struct smb_rqst *old_rq)
2232 {
2233         struct kvec *iov;
2234         struct page **pages;
2235         struct smb2_transform_hdr *tr_hdr;
2236         unsigned int npages = old_rq->rq_npages;
2237         int i;
2238         int rc = -ENOMEM;
2239
2240         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2241         if (!pages)
2242                 return rc;
2243
2244         new_rq->rq_pages = pages;
2245         new_rq->rq_npages = old_rq->rq_npages;
2246         new_rq->rq_pagesz = old_rq->rq_pagesz;
2247         new_rq->rq_tailsz = old_rq->rq_tailsz;
2248
2249         for (i = 0; i < npages; i++) {
2250                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2251                 if (!pages[i])
2252                         goto err_free_pages;
2253         }
2254
2255         iov = kmalloc_array(old_rq->rq_nvec, sizeof(struct kvec), GFP_KERNEL);
2256         if (!iov)
2257                 goto err_free_pages;
2258
2259         /* copy all iovs from the old except the 1st one (rfc1002 length) */
2260         memcpy(&iov[1], &old_rq->rq_iov[1],
2261                                 sizeof(struct kvec) * (old_rq->rq_nvec - 1));
2262         new_rq->rq_iov = iov;
2263         new_rq->rq_nvec = old_rq->rq_nvec;
2264
2265         tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
2266         if (!tr_hdr)
2267                 goto err_free_iov;
2268
2269         /* fill the 1st iov with a transform header */
2270         fill_transform_hdr(server, tr_hdr, old_rq);
2271         new_rq->rq_iov[0].iov_base = tr_hdr;
2272         new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2273
2274         /* copy pages form the old */
2275         for (i = 0; i < npages; i++) {
2276                 char *dst = kmap(new_rq->rq_pages[i]);
2277                 char *src = kmap(old_rq->rq_pages[i]);
2278                 unsigned int len = (i < npages - 1) ? new_rq->rq_pagesz :
2279                                                         new_rq->rq_tailsz;
2280                 memcpy(dst, src, len);
2281                 kunmap(new_rq->rq_pages[i]);
2282                 kunmap(old_rq->rq_pages[i]);
2283         }
2284
2285         rc = crypt_message(server, new_rq, 1);
2286         cifs_dbg(FYI, "encrypt message returned %d", rc);
2287         if (rc)
2288                 goto err_free_tr_hdr;
2289
2290         return rc;
2291
2292 err_free_tr_hdr:
2293         kfree(tr_hdr);
2294 err_free_iov:
2295         kfree(iov);
2296 err_free_pages:
2297         for (i = i - 1; i >= 0; i--)
2298                 put_page(pages[i]);
2299         kfree(pages);
2300         return rc;
2301 }
2302
2303 static void
2304 smb3_free_transform_rq(struct smb_rqst *rqst)
2305 {
2306         int i = rqst->rq_npages - 1;
2307
2308         for (; i >= 0; i--)
2309                 put_page(rqst->rq_pages[i]);
2310         kfree(rqst->rq_pages);
2311         /* free transform header */
2312         kfree(rqst->rq_iov[0].iov_base);
2313         kfree(rqst->rq_iov);
2314 }
2315
2316 static int
2317 smb3_is_transform_hdr(void *buf)
2318 {
2319         struct smb2_transform_hdr *trhdr = buf;
2320
2321         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2322 }
2323
2324 static int
2325 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2326                  unsigned int buf_data_size, struct page **pages,
2327                  unsigned int npages, unsigned int page_data_size)
2328 {
2329         struct kvec iov[2];
2330         struct smb_rqst rqst = {NULL};
2331         struct smb2_hdr *hdr;
2332         int rc;
2333
2334         iov[0].iov_base = buf;
2335         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2336         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
2337         iov[1].iov_len = buf_data_size;
2338
2339         rqst.rq_iov = iov;
2340         rqst.rq_nvec = 2;
2341         rqst.rq_pages = pages;
2342         rqst.rq_npages = npages;
2343         rqst.rq_pagesz = PAGE_SIZE;
2344         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2345
2346         rc = crypt_message(server, &rqst, 0);
2347         cifs_dbg(FYI, "decrypt message returned %d\n", rc);
2348
2349         if (rc)
2350                 return rc;
2351
2352         memmove(buf + server->vals->header_preamble_size, iov[1].iov_base, buf_data_size);
2353         hdr = (struct smb2_hdr *)buf;
2354         hdr->smb2_buf_length = cpu_to_be32(buf_data_size + page_data_size);
2355         server->total_read = buf_data_size + page_data_size + server->vals->header_preamble_size;
2356
2357         return rc;
2358 }
2359
2360 static int
2361 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
2362                      unsigned int npages, unsigned int len)
2363 {
2364         int i;
2365         int length;
2366
2367         for (i = 0; i < npages; i++) {
2368                 struct page *page = pages[i];
2369                 size_t n;
2370
2371                 n = len;
2372                 if (len >= PAGE_SIZE) {
2373                         /* enough data to fill the page */
2374                         n = PAGE_SIZE;
2375                         len -= n;
2376                 } else {
2377                         zero_user(page, len, PAGE_SIZE - len);
2378                         len = 0;
2379                 }
2380                 length = cifs_read_page_from_socket(server, page, n);
2381                 if (length < 0)
2382                         return length;
2383                 server->total_read += length;
2384         }
2385
2386         return 0;
2387 }
2388
2389 static int
2390 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2391                unsigned int cur_off, struct bio_vec **page_vec)
2392 {
2393         struct bio_vec *bvec;
2394         int i;
2395
2396         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2397         if (!bvec)
2398                 return -ENOMEM;
2399
2400         for (i = 0; i < npages; i++) {
2401                 bvec[i].bv_page = pages[i];
2402                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2403                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2404                 data_size -= bvec[i].bv_len;
2405         }
2406
2407         if (data_size != 0) {
2408                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2409                 kfree(bvec);
2410                 return -EIO;
2411         }
2412
2413         *page_vec = bvec;
2414         return 0;
2415 }
2416
2417 static int
2418 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2419                  char *buf, unsigned int buf_len, struct page **pages,
2420                  unsigned int npages, unsigned int page_data_size)
2421 {
2422         unsigned int data_offset;
2423         unsigned int data_len;
2424         unsigned int cur_off;
2425         unsigned int cur_page_idx;
2426         unsigned int pad_len;
2427         struct cifs_readdata *rdata = mid->callback_data;
2428         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
2429         struct bio_vec *bvec = NULL;
2430         struct iov_iter iter;
2431         struct kvec iov;
2432         int length;
2433         bool use_rdma_mr = false;
2434
2435         if (shdr->Command != SMB2_READ) {
2436                 cifs_dbg(VFS, "only big read responses are supported\n");
2437                 return -ENOTSUPP;
2438         }
2439
2440         if (server->ops->is_session_expired &&
2441             server->ops->is_session_expired(buf)) {
2442                 cifs_reconnect(server);
2443                 wake_up(&server->response_q);
2444                 return -1;
2445         }
2446
2447         if (server->ops->is_status_pending &&
2448                         server->ops->is_status_pending(buf, server, 0))
2449                 return -1;
2450
2451         rdata->result = server->ops->map_error(buf, false);
2452         if (rdata->result != 0) {
2453                 cifs_dbg(FYI, "%s: server returned error %d\n",
2454                          __func__, rdata->result);
2455                 dequeue_mid(mid, rdata->result);
2456                 return 0;
2457         }
2458
2459         data_offset = server->ops->read_data_offset(buf) + server->vals->header_preamble_size;
2460 #ifdef CONFIG_CIFS_SMB_DIRECT
2461         use_rdma_mr = rdata->mr;
2462 #endif
2463         data_len = server->ops->read_data_length(buf, use_rdma_mr);
2464
2465         if (data_offset < server->vals->read_rsp_size) {
2466                 /*
2467                  * win2k8 sometimes sends an offset of 0 when the read
2468                  * is beyond the EOF. Treat it as if the data starts just after
2469                  * the header.
2470                  */
2471                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2472                          __func__, data_offset);
2473                 data_offset = server->vals->read_rsp_size;
2474         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2475                 /* data_offset is beyond the end of smallbuf */
2476                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2477                          __func__, data_offset);
2478                 rdata->result = -EIO;
2479                 dequeue_mid(mid, rdata->result);
2480                 return 0;
2481         }
2482
2483         pad_len = data_offset - server->vals->read_rsp_size;
2484
2485         if (buf_len <= data_offset) {
2486                 /* read response payload is in pages */
2487                 cur_page_idx = pad_len / PAGE_SIZE;
2488                 cur_off = pad_len % PAGE_SIZE;
2489
2490                 if (cur_page_idx != 0) {
2491                         /* data offset is beyond the 1st page of response */
2492                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2493                                  __func__, data_offset);
2494                         rdata->result = -EIO;
2495                         dequeue_mid(mid, rdata->result);
2496                         return 0;
2497                 }
2498
2499                 if (data_len > page_data_size - pad_len) {
2500                         /* data_len is corrupt -- discard frame */
2501                         rdata->result = -EIO;
2502                         dequeue_mid(mid, rdata->result);
2503                         return 0;
2504                 }
2505
2506                 rdata->result = init_read_bvec(pages, npages, page_data_size,
2507                                                cur_off, &bvec);
2508                 if (rdata->result != 0) {
2509                         dequeue_mid(mid, rdata->result);
2510                         return 0;
2511                 }
2512
2513                 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
2514         } else if (buf_len >= data_offset + data_len) {
2515                 /* read response payload is in buf */
2516                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2517                 iov.iov_base = buf + data_offset;
2518                 iov.iov_len = data_len;
2519                 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2520         } else {
2521                 /* read response payload cannot be in both buf and pages */
2522                 WARN_ONCE(1, "buf can not contain only a part of read data");
2523                 rdata->result = -EIO;
2524                 dequeue_mid(mid, rdata->result);
2525                 return 0;
2526         }
2527
2528         /* set up first iov for signature check */
2529         rdata->iov[0].iov_base = buf;
2530         rdata->iov[0].iov_len = 4;
2531         rdata->iov[1].iov_base = buf + 4;
2532         rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2533         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2534                  rdata->iov[0].iov_base, server->vals->read_rsp_size);
2535
2536         length = rdata->copy_into_pages(server, rdata, &iter);
2537
2538         kfree(bvec);
2539
2540         if (length < 0)
2541                 return length;
2542
2543         dequeue_mid(mid, false);
2544         return length;
2545 }
2546
2547 static int
2548 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2549 {
2550         char *buf = server->smallbuf;
2551         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2552         unsigned int npages;
2553         struct page **pages;
2554         unsigned int len;
2555         unsigned int buflen = server->pdu_size + server->vals->header_preamble_size;
2556         int rc;
2557         int i = 0;
2558
2559         len = min_t(unsigned int, buflen, server->vals->read_rsp_size -
2560                 server->vals->header_preamble_size +
2561                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2562
2563         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2564         if (rc < 0)
2565                 return rc;
2566         server->total_read += rc;
2567
2568         len = le32_to_cpu(tr_hdr->OriginalMessageSize) +
2569                 server->vals->header_preamble_size -
2570                 server->vals->read_rsp_size;
2571         npages = DIV_ROUND_UP(len, PAGE_SIZE);
2572
2573         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2574         if (!pages) {
2575                 rc = -ENOMEM;
2576                 goto discard_data;
2577         }
2578
2579         for (; i < npages; i++) {
2580                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2581                 if (!pages[i]) {
2582                         rc = -ENOMEM;
2583                         goto discard_data;
2584                 }
2585         }
2586
2587         /* read read data into pages */
2588         rc = read_data_into_pages(server, pages, npages, len);
2589         if (rc)
2590                 goto free_pages;
2591
2592         rc = cifs_discard_remaining_data(server);
2593         if (rc)
2594                 goto free_pages;
2595
2596         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size -
2597                               server->vals->header_preamble_size,
2598                               pages, npages, len);
2599         if (rc)
2600                 goto free_pages;
2601
2602         *mid = smb2_find_mid(server, buf);
2603         if (*mid == NULL)
2604                 cifs_dbg(FYI, "mid not found\n");
2605         else {
2606                 cifs_dbg(FYI, "mid found\n");
2607                 (*mid)->decrypted = true;
2608                 rc = handle_read_data(server, *mid, buf,
2609                                       server->vals->read_rsp_size,
2610                                       pages, npages, len);
2611         }
2612
2613 free_pages:
2614         for (i = i - 1; i >= 0; i--)
2615                 put_page(pages[i]);
2616         kfree(pages);
2617         return rc;
2618 discard_data:
2619         cifs_discard_remaining_data(server);
2620         goto free_pages;
2621 }
2622
2623 static int
2624 receive_encrypted_standard(struct TCP_Server_Info *server,
2625                            struct mid_q_entry **mid)
2626 {
2627         int length;
2628         char *buf = server->smallbuf;
2629         unsigned int pdu_length = server->pdu_size;
2630         unsigned int buf_size;
2631         struct mid_q_entry *mid_entry;
2632
2633         /* switch to large buffer if too big for a small one */
2634         if (pdu_length + server->vals->header_preamble_size > MAX_CIFS_SMALL_BUFFER_SIZE) {
2635                 server->large_buf = true;
2636                 memcpy(server->bigbuf, buf, server->total_read);
2637                 buf = server->bigbuf;
2638         }
2639
2640         /* now read the rest */
2641         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
2642                                 pdu_length - HEADER_SIZE(server) + 1 +
2643                                 server->vals->header_preamble_size);
2644         if (length < 0)
2645                 return length;
2646         server->total_read += length;
2647
2648         buf_size = pdu_length + server->vals->header_preamble_size - sizeof(struct smb2_transform_hdr);
2649         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2650         if (length)
2651                 return length;
2652
2653         mid_entry = smb2_find_mid(server, buf);
2654         if (mid_entry == NULL)
2655                 cifs_dbg(FYI, "mid not found\n");
2656         else {
2657                 cifs_dbg(FYI, "mid found\n");
2658                 mid_entry->decrypted = true;
2659         }
2660
2661         *mid = mid_entry;
2662
2663         if (mid_entry && mid_entry->handle)
2664                 return mid_entry->handle(server, mid_entry);
2665
2666         return cifs_handle_standard(server, mid_entry);
2667 }
2668
2669 static int
2670 smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2671 {
2672         char *buf = server->smallbuf;
2673         unsigned int pdu_length = server->pdu_size;
2674         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2675         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2676
2677         if (pdu_length + server->vals->header_preamble_size < sizeof(struct smb2_transform_hdr) +
2678                                                 sizeof(struct smb2_sync_hdr)) {
2679                 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2680                          pdu_length);
2681                 cifs_reconnect(server);
2682                 wake_up(&server->response_q);
2683                 return -ECONNABORTED;
2684         }
2685
2686         if (pdu_length + server->vals->header_preamble_size < orig_len + sizeof(struct smb2_transform_hdr)) {
2687                 cifs_dbg(VFS, "Transform message is broken\n");
2688                 cifs_reconnect(server);
2689                 wake_up(&server->response_q);
2690                 return -ECONNABORTED;
2691         }
2692
2693         if (pdu_length + server->vals->header_preamble_size > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
2694                 return receive_encrypted_read(server, mid);
2695
2696         return receive_encrypted_standard(server, mid);
2697 }
2698
2699 int
2700 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
2701 {
2702         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
2703
2704         return handle_read_data(server, mid, buf, server->pdu_size +
2705                                 server->vals->header_preamble_size,
2706                                 NULL, 0, 0);
2707 }
2708
2709 struct smb_version_operations smb20_operations = {
2710         .compare_fids = smb2_compare_fids,
2711         .setup_request = smb2_setup_request,
2712         .setup_async_request = smb2_setup_async_request,
2713         .check_receive = smb2_check_receive,
2714         .add_credits = smb2_add_credits,
2715         .set_credits = smb2_set_credits,
2716         .get_credits_field = smb2_get_credits_field,
2717         .get_credits = smb2_get_credits,
2718         .wait_mtu_credits = cifs_wait_mtu_credits,
2719         .get_next_mid = smb2_get_next_mid,
2720         .read_data_offset = smb2_read_data_offset,
2721         .read_data_length = smb2_read_data_length,
2722         .map_error = map_smb2_to_linux_error,
2723         .find_mid = smb2_find_mid,
2724         .check_message = smb2_check_message,
2725         .dump_detail = smb2_dump_detail,
2726         .clear_stats = smb2_clear_stats,
2727         .print_stats = smb2_print_stats,
2728         .is_oplock_break = smb2_is_valid_oplock_break,
2729         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2730         .downgrade_oplock = smb2_downgrade_oplock,
2731         .need_neg = smb2_need_neg,
2732         .negotiate = smb2_negotiate,
2733         .negotiate_wsize = smb2_negotiate_wsize,
2734         .negotiate_rsize = smb2_negotiate_rsize,
2735         .sess_setup = SMB2_sess_setup,
2736         .logoff = SMB2_logoff,
2737         .tree_connect = SMB2_tcon,
2738         .tree_disconnect = SMB2_tdis,
2739         .qfs_tcon = smb2_qfs_tcon,
2740         .is_path_accessible = smb2_is_path_accessible,
2741         .can_echo = smb2_can_echo,
2742         .echo = SMB2_echo,
2743         .query_path_info = smb2_query_path_info,
2744         .get_srv_inum = smb2_get_srv_inum,
2745         .query_file_info = smb2_query_file_info,
2746         .set_path_size = smb2_set_path_size,
2747         .set_file_size = smb2_set_file_size,
2748         .set_file_info = smb2_set_file_info,
2749         .set_compression = smb2_set_compression,
2750         .mkdir = smb2_mkdir,
2751         .mkdir_setinfo = smb2_mkdir_setinfo,
2752         .rmdir = smb2_rmdir,
2753         .unlink = smb2_unlink,
2754         .rename = smb2_rename_path,
2755         .create_hardlink = smb2_create_hardlink,
2756         .query_symlink = smb2_query_symlink,
2757         .query_mf_symlink = smb3_query_mf_symlink,
2758         .create_mf_symlink = smb3_create_mf_symlink,
2759         .open = smb2_open_file,
2760         .set_fid = smb2_set_fid,
2761         .close = smb2_close_file,
2762         .flush = smb2_flush_file,
2763         .async_readv = smb2_async_readv,
2764         .async_writev = smb2_async_writev,
2765         .sync_read = smb2_sync_read,
2766         .sync_write = smb2_sync_write,
2767         .query_dir_first = smb2_query_dir_first,
2768         .query_dir_next = smb2_query_dir_next,
2769         .close_dir = smb2_close_dir,
2770         .calc_smb_size = smb2_calc_size,
2771         .is_status_pending = smb2_is_status_pending,
2772         .is_session_expired = smb2_is_session_expired,
2773         .oplock_response = smb2_oplock_response,
2774         .queryfs = smb2_queryfs,
2775         .mand_lock = smb2_mand_lock,
2776         .mand_unlock_range = smb2_unlock_range,
2777         .push_mand_locks = smb2_push_mandatory_locks,
2778         .get_lease_key = smb2_get_lease_key,
2779         .set_lease_key = smb2_set_lease_key,
2780         .new_lease_key = smb2_new_lease_key,
2781         .calc_signature = smb2_calc_signature,
2782         .is_read_op = smb2_is_read_op,
2783         .set_oplock_level = smb2_set_oplock_level,
2784         .create_lease_buf = smb2_create_lease_buf,
2785         .parse_lease_buf = smb2_parse_lease_buf,
2786         .copychunk_range = smb2_copychunk_range,
2787         .wp_retry_size = smb2_wp_retry_size,
2788         .dir_needs_close = smb2_dir_needs_close,
2789         .get_dfs_refer = smb2_get_dfs_refer,
2790         .select_sectype = smb2_select_sectype,
2791 #ifdef CONFIG_CIFS_XATTR
2792         .query_all_EAs = smb2_query_eas,
2793         .set_EA = smb2_set_ea,
2794 #endif /* CIFS_XATTR */
2795 #ifdef CONFIG_CIFS_ACL
2796         .get_acl = get_smb2_acl,
2797         .get_acl_by_fid = get_smb2_acl_by_fid,
2798         .set_acl = set_smb2_acl,
2799 #endif /* CIFS_ACL */
2800 };
2801
2802 struct smb_version_operations smb21_operations = {
2803         .compare_fids = smb2_compare_fids,
2804         .setup_request = smb2_setup_request,
2805         .setup_async_request = smb2_setup_async_request,
2806         .check_receive = smb2_check_receive,
2807         .add_credits = smb2_add_credits,
2808         .set_credits = smb2_set_credits,
2809         .get_credits_field = smb2_get_credits_field,
2810         .get_credits = smb2_get_credits,
2811         .wait_mtu_credits = smb2_wait_mtu_credits,
2812         .get_next_mid = smb2_get_next_mid,
2813         .read_data_offset = smb2_read_data_offset,
2814         .read_data_length = smb2_read_data_length,
2815         .map_error = map_smb2_to_linux_error,
2816         .find_mid = smb2_find_mid,
2817         .check_message = smb2_check_message,
2818         .dump_detail = smb2_dump_detail,
2819         .clear_stats = smb2_clear_stats,
2820         .print_stats = smb2_print_stats,
2821         .is_oplock_break = smb2_is_valid_oplock_break,
2822         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2823         .downgrade_oplock = smb2_downgrade_oplock,
2824         .need_neg = smb2_need_neg,
2825         .negotiate = smb2_negotiate,
2826         .negotiate_wsize = smb2_negotiate_wsize,
2827         .negotiate_rsize = smb2_negotiate_rsize,
2828         .sess_setup = SMB2_sess_setup,
2829         .logoff = SMB2_logoff,
2830         .tree_connect = SMB2_tcon,
2831         .tree_disconnect = SMB2_tdis,
2832         .qfs_tcon = smb2_qfs_tcon,
2833         .is_path_accessible = smb2_is_path_accessible,
2834         .can_echo = smb2_can_echo,
2835         .echo = SMB2_echo,
2836         .query_path_info = smb2_query_path_info,
2837         .get_srv_inum = smb2_get_srv_inum,
2838         .query_file_info = smb2_query_file_info,
2839         .set_path_size = smb2_set_path_size,
2840         .set_file_size = smb2_set_file_size,
2841         .set_file_info = smb2_set_file_info,
2842         .set_compression = smb2_set_compression,
2843         .mkdir = smb2_mkdir,
2844         .mkdir_setinfo = smb2_mkdir_setinfo,
2845         .rmdir = smb2_rmdir,
2846         .unlink = smb2_unlink,
2847         .rename = smb2_rename_path,
2848         .create_hardlink = smb2_create_hardlink,
2849         .query_symlink = smb2_query_symlink,
2850         .query_mf_symlink = smb3_query_mf_symlink,
2851         .create_mf_symlink = smb3_create_mf_symlink,
2852         .open = smb2_open_file,
2853         .set_fid = smb2_set_fid,
2854         .close = smb2_close_file,
2855         .flush = smb2_flush_file,
2856         .async_readv = smb2_async_readv,
2857         .async_writev = smb2_async_writev,
2858         .sync_read = smb2_sync_read,
2859         .sync_write = smb2_sync_write,
2860         .query_dir_first = smb2_query_dir_first,
2861         .query_dir_next = smb2_query_dir_next,
2862         .close_dir = smb2_close_dir,
2863         .calc_smb_size = smb2_calc_size,
2864         .is_status_pending = smb2_is_status_pending,
2865         .is_session_expired = smb2_is_session_expired,
2866         .oplock_response = smb2_oplock_response,
2867         .queryfs = smb2_queryfs,
2868         .mand_lock = smb2_mand_lock,
2869         .mand_unlock_range = smb2_unlock_range,
2870         .push_mand_locks = smb2_push_mandatory_locks,
2871         .get_lease_key = smb2_get_lease_key,
2872         .set_lease_key = smb2_set_lease_key,
2873         .new_lease_key = smb2_new_lease_key,
2874         .calc_signature = smb2_calc_signature,
2875         .is_read_op = smb21_is_read_op,
2876         .set_oplock_level = smb21_set_oplock_level,
2877         .create_lease_buf = smb2_create_lease_buf,
2878         .parse_lease_buf = smb2_parse_lease_buf,
2879         .copychunk_range = smb2_copychunk_range,
2880         .wp_retry_size = smb2_wp_retry_size,
2881         .dir_needs_close = smb2_dir_needs_close,
2882         .enum_snapshots = smb3_enum_snapshots,
2883         .get_dfs_refer = smb2_get_dfs_refer,
2884         .select_sectype = smb2_select_sectype,
2885 #ifdef CONFIG_CIFS_XATTR
2886         .query_all_EAs = smb2_query_eas,
2887         .set_EA = smb2_set_ea,
2888 #endif /* CIFS_XATTR */
2889 #ifdef CONFIG_CIFS_ACL
2890         .get_acl = get_smb2_acl,
2891         .get_acl_by_fid = get_smb2_acl_by_fid,
2892         .set_acl = set_smb2_acl,
2893 #endif /* CIFS_ACL */
2894 };
2895
2896 struct smb_version_operations smb30_operations = {
2897         .compare_fids = smb2_compare_fids,
2898         .setup_request = smb2_setup_request,
2899         .setup_async_request = smb2_setup_async_request,
2900         .check_receive = smb2_check_receive,
2901         .add_credits = smb2_add_credits,
2902         .set_credits = smb2_set_credits,
2903         .get_credits_field = smb2_get_credits_field,
2904         .get_credits = smb2_get_credits,
2905         .wait_mtu_credits = smb2_wait_mtu_credits,
2906         .get_next_mid = smb2_get_next_mid,
2907         .read_data_offset = smb2_read_data_offset,
2908         .read_data_length = smb2_read_data_length,
2909         .map_error = map_smb2_to_linux_error,
2910         .find_mid = smb2_find_mid,
2911         .check_message = smb2_check_message,
2912         .dump_detail = smb2_dump_detail,
2913         .clear_stats = smb2_clear_stats,
2914         .print_stats = smb2_print_stats,
2915         .dump_share_caps = smb2_dump_share_caps,
2916         .is_oplock_break = smb2_is_valid_oplock_break,
2917         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2918         .downgrade_oplock = smb2_downgrade_oplock,
2919         .need_neg = smb2_need_neg,
2920         .negotiate = smb2_negotiate,
2921         .negotiate_wsize = smb2_negotiate_wsize,
2922         .negotiate_rsize = smb2_negotiate_rsize,
2923         .sess_setup = SMB2_sess_setup,
2924         .logoff = SMB2_logoff,
2925         .tree_connect = SMB2_tcon,
2926         .tree_disconnect = SMB2_tdis,
2927         .qfs_tcon = smb3_qfs_tcon,
2928         .is_path_accessible = smb2_is_path_accessible,
2929         .can_echo = smb2_can_echo,
2930         .echo = SMB2_echo,
2931         .query_path_info = smb2_query_path_info,
2932         .get_srv_inum = smb2_get_srv_inum,
2933         .query_file_info = smb2_query_file_info,
2934         .set_path_size = smb2_set_path_size,
2935         .set_file_size = smb2_set_file_size,
2936         .set_file_info = smb2_set_file_info,
2937         .set_compression = smb2_set_compression,
2938         .mkdir = smb2_mkdir,
2939         .mkdir_setinfo = smb2_mkdir_setinfo,
2940         .rmdir = smb2_rmdir,
2941         .unlink = smb2_unlink,
2942         .rename = smb2_rename_path,
2943         .create_hardlink = smb2_create_hardlink,
2944         .query_symlink = smb2_query_symlink,
2945         .query_mf_symlink = smb3_query_mf_symlink,
2946         .create_mf_symlink = smb3_create_mf_symlink,
2947         .open = smb2_open_file,
2948         .set_fid = smb2_set_fid,
2949         .close = smb2_close_file,
2950         .flush = smb2_flush_file,
2951         .async_readv = smb2_async_readv,
2952         .async_writev = smb2_async_writev,
2953         .sync_read = smb2_sync_read,
2954         .sync_write = smb2_sync_write,
2955         .query_dir_first = smb2_query_dir_first,
2956         .query_dir_next = smb2_query_dir_next,
2957         .close_dir = smb2_close_dir,
2958         .calc_smb_size = smb2_calc_size,
2959         .is_status_pending = smb2_is_status_pending,
2960         .is_session_expired = smb2_is_session_expired,
2961         .oplock_response = smb2_oplock_response,
2962         .queryfs = smb2_queryfs,
2963         .mand_lock = smb2_mand_lock,
2964         .mand_unlock_range = smb2_unlock_range,
2965         .push_mand_locks = smb2_push_mandatory_locks,
2966         .get_lease_key = smb2_get_lease_key,
2967         .set_lease_key = smb2_set_lease_key,
2968         .new_lease_key = smb2_new_lease_key,
2969         .generate_signingkey = generate_smb30signingkey,
2970         .calc_signature = smb3_calc_signature,
2971         .set_integrity  = smb3_set_integrity,
2972         .is_read_op = smb21_is_read_op,
2973         .set_oplock_level = smb3_set_oplock_level,
2974         .create_lease_buf = smb3_create_lease_buf,
2975         .parse_lease_buf = smb3_parse_lease_buf,
2976         .copychunk_range = smb2_copychunk_range,
2977         .duplicate_extents = smb2_duplicate_extents,
2978         .validate_negotiate = smb3_validate_negotiate,
2979         .wp_retry_size = smb2_wp_retry_size,
2980         .dir_needs_close = smb2_dir_needs_close,
2981         .fallocate = smb3_fallocate,
2982         .enum_snapshots = smb3_enum_snapshots,
2983         .init_transform_rq = smb3_init_transform_rq,
2984         .free_transform_rq = smb3_free_transform_rq,
2985         .is_transform_hdr = smb3_is_transform_hdr,
2986         .receive_transform = smb3_receive_transform,
2987         .get_dfs_refer = smb2_get_dfs_refer,
2988         .select_sectype = smb2_select_sectype,
2989 #ifdef CONFIG_CIFS_XATTR
2990         .query_all_EAs = smb2_query_eas,
2991         .set_EA = smb2_set_ea,
2992 #endif /* CIFS_XATTR */
2993 #ifdef CONFIG_CIFS_ACL
2994         .get_acl = get_smb2_acl,
2995         .get_acl_by_fid = get_smb2_acl_by_fid,
2996         .set_acl = set_smb2_acl,
2997 #endif /* CIFS_ACL */
2998 };
2999
3000 #ifdef CONFIG_CIFS_SMB311
3001 struct smb_version_operations smb311_operations = {
3002         .compare_fids = smb2_compare_fids,
3003         .setup_request = smb2_setup_request,
3004         .setup_async_request = smb2_setup_async_request,
3005         .check_receive = smb2_check_receive,
3006         .add_credits = smb2_add_credits,
3007         .set_credits = smb2_set_credits,
3008         .get_credits_field = smb2_get_credits_field,
3009         .get_credits = smb2_get_credits,
3010         .wait_mtu_credits = smb2_wait_mtu_credits,
3011         .get_next_mid = smb2_get_next_mid,
3012         .read_data_offset = smb2_read_data_offset,
3013         .read_data_length = smb2_read_data_length,
3014         .map_error = map_smb2_to_linux_error,
3015         .find_mid = smb2_find_mid,
3016         .check_message = smb2_check_message,
3017         .dump_detail = smb2_dump_detail,
3018         .clear_stats = smb2_clear_stats,
3019         .print_stats = smb2_print_stats,
3020         .dump_share_caps = smb2_dump_share_caps,
3021         .is_oplock_break = smb2_is_valid_oplock_break,
3022         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3023         .downgrade_oplock = smb2_downgrade_oplock,
3024         .need_neg = smb2_need_neg,
3025         .negotiate = smb2_negotiate,
3026         .negotiate_wsize = smb2_negotiate_wsize,
3027         .negotiate_rsize = smb2_negotiate_rsize,
3028         .sess_setup = SMB2_sess_setup,
3029         .logoff = SMB2_logoff,
3030         .tree_connect = SMB2_tcon,
3031         .tree_disconnect = SMB2_tdis,
3032         .qfs_tcon = smb3_qfs_tcon,
3033         .is_path_accessible = smb2_is_path_accessible,
3034         .can_echo = smb2_can_echo,
3035         .echo = SMB2_echo,
3036         .query_path_info = smb2_query_path_info,
3037         .get_srv_inum = smb2_get_srv_inum,
3038         .query_file_info = smb2_query_file_info,
3039         .set_path_size = smb2_set_path_size,
3040         .set_file_size = smb2_set_file_size,
3041         .set_file_info = smb2_set_file_info,
3042         .set_compression = smb2_set_compression,
3043         .mkdir = smb2_mkdir,
3044         .mkdir_setinfo = smb2_mkdir_setinfo,
3045         .rmdir = smb2_rmdir,
3046         .unlink = smb2_unlink,
3047         .rename = smb2_rename_path,
3048         .create_hardlink = smb2_create_hardlink,
3049         .query_symlink = smb2_query_symlink,
3050         .query_mf_symlink = smb3_query_mf_symlink,
3051         .create_mf_symlink = smb3_create_mf_symlink,
3052         .open = smb2_open_file,
3053         .set_fid = smb2_set_fid,
3054         .close = smb2_close_file,
3055         .flush = smb2_flush_file,
3056         .async_readv = smb2_async_readv,
3057         .async_writev = smb2_async_writev,
3058         .sync_read = smb2_sync_read,
3059         .sync_write = smb2_sync_write,
3060         .query_dir_first = smb2_query_dir_first,
3061         .query_dir_next = smb2_query_dir_next,
3062         .close_dir = smb2_close_dir,
3063         .calc_smb_size = smb2_calc_size,
3064         .is_status_pending = smb2_is_status_pending,
3065         .is_session_expired = smb2_is_session_expired,
3066         .oplock_response = smb2_oplock_response,
3067         .queryfs = smb2_queryfs,
3068         .mand_lock = smb2_mand_lock,
3069         .mand_unlock_range = smb2_unlock_range,
3070         .push_mand_locks = smb2_push_mandatory_locks,
3071         .get_lease_key = smb2_get_lease_key,
3072         .set_lease_key = smb2_set_lease_key,
3073         .new_lease_key = smb2_new_lease_key,
3074         .generate_signingkey = generate_smb311signingkey,
3075         .calc_signature = smb3_calc_signature,
3076         .set_integrity  = smb3_set_integrity,
3077         .is_read_op = smb21_is_read_op,
3078         .set_oplock_level = smb3_set_oplock_level,
3079         .create_lease_buf = smb3_create_lease_buf,
3080         .parse_lease_buf = smb3_parse_lease_buf,
3081         .copychunk_range = smb2_copychunk_range,
3082         .duplicate_extents = smb2_duplicate_extents,
3083 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3084         .wp_retry_size = smb2_wp_retry_size,
3085         .dir_needs_close = smb2_dir_needs_close,
3086         .fallocate = smb3_fallocate,
3087         .enum_snapshots = smb3_enum_snapshots,
3088         .init_transform_rq = smb3_init_transform_rq,
3089         .free_transform_rq = smb3_free_transform_rq,
3090         .is_transform_hdr = smb3_is_transform_hdr,
3091         .receive_transform = smb3_receive_transform,
3092         .get_dfs_refer = smb2_get_dfs_refer,
3093         .select_sectype = smb2_select_sectype,
3094 #ifdef CONFIG_CIFS_XATTR
3095         .query_all_EAs = smb2_query_eas,
3096         .set_EA = smb2_set_ea,
3097 #endif /* CIFS_XATTR */
3098 };
3099 #endif /* CIFS_SMB311 */
3100
3101 struct smb_version_values smb20_values = {
3102         .version_string = SMB20_VERSION_STRING,
3103         .protocol_id = SMB20_PROT_ID,
3104         .req_capabilities = 0, /* MBZ */
3105         .large_lock_type = 0,
3106         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3107         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3108         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3109         .header_size = sizeof(struct smb2_hdr),
3110         .header_preamble_size = 4,
3111         .max_header_size = MAX_SMB2_HDR_SIZE,
3112         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3113         .lock_cmd = SMB2_LOCK,
3114         .cap_unix = 0,
3115         .cap_nt_find = SMB2_NT_FIND,
3116         .cap_large_files = SMB2_LARGE_FILES,
3117         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3118         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3119         .create_lease_size = sizeof(struct create_lease),
3120 };
3121
3122 struct smb_version_values smb21_values = {
3123         .version_string = SMB21_VERSION_STRING,
3124         .protocol_id = SMB21_PROT_ID,
3125         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3126         .large_lock_type = 0,
3127         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3128         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3129         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3130         .header_size = sizeof(struct smb2_hdr),
3131         .header_preamble_size = 4,
3132         .max_header_size = MAX_SMB2_HDR_SIZE,
3133         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3134         .lock_cmd = SMB2_LOCK,
3135         .cap_unix = 0,
3136         .cap_nt_find = SMB2_NT_FIND,
3137         .cap_large_files = SMB2_LARGE_FILES,
3138         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3139         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3140         .create_lease_size = sizeof(struct create_lease),
3141 };
3142
3143 struct smb_version_values smb3any_values = {
3144         .version_string = SMB3ANY_VERSION_STRING,
3145         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3146         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3147         .large_lock_type = 0,
3148         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3149         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3150         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3151         .header_size = sizeof(struct smb2_hdr),
3152         .header_preamble_size = 4,
3153         .max_header_size = MAX_SMB2_HDR_SIZE,
3154         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3155         .lock_cmd = SMB2_LOCK,
3156         .cap_unix = 0,
3157         .cap_nt_find = SMB2_NT_FIND,
3158         .cap_large_files = SMB2_LARGE_FILES,
3159         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3160         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3161         .create_lease_size = sizeof(struct create_lease_v2),
3162 };
3163
3164 struct smb_version_values smbdefault_values = {
3165         .version_string = SMBDEFAULT_VERSION_STRING,
3166         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3167         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3168         .large_lock_type = 0,
3169         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3170         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3171         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3172         .header_size = sizeof(struct smb2_hdr),
3173         .header_preamble_size = 4,
3174         .max_header_size = MAX_SMB2_HDR_SIZE,
3175         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3176         .lock_cmd = SMB2_LOCK,
3177         .cap_unix = 0,
3178         .cap_nt_find = SMB2_NT_FIND,
3179         .cap_large_files = SMB2_LARGE_FILES,
3180         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3181         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3182         .create_lease_size = sizeof(struct create_lease_v2),
3183 };
3184
3185 struct smb_version_values smb30_values = {
3186         .version_string = SMB30_VERSION_STRING,
3187         .protocol_id = SMB30_PROT_ID,
3188         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3189         .large_lock_type = 0,
3190         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3191         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3192         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3193         .header_size = sizeof(struct smb2_hdr),
3194         .header_preamble_size = 4,
3195         .max_header_size = MAX_SMB2_HDR_SIZE,
3196         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3197         .lock_cmd = SMB2_LOCK,
3198         .cap_unix = 0,
3199         .cap_nt_find = SMB2_NT_FIND,
3200         .cap_large_files = SMB2_LARGE_FILES,
3201         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3202         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3203         .create_lease_size = sizeof(struct create_lease_v2),
3204 };
3205
3206 struct smb_version_values smb302_values = {
3207         .version_string = SMB302_VERSION_STRING,
3208         .protocol_id = SMB302_PROT_ID,
3209         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3210         .large_lock_type = 0,
3211         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3212         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3213         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3214         .header_size = sizeof(struct smb2_hdr),
3215         .header_preamble_size = 4,
3216         .max_header_size = MAX_SMB2_HDR_SIZE,
3217         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3218         .lock_cmd = SMB2_LOCK,
3219         .cap_unix = 0,
3220         .cap_nt_find = SMB2_NT_FIND,
3221         .cap_large_files = SMB2_LARGE_FILES,
3222         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3223         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3224         .create_lease_size = sizeof(struct create_lease_v2),
3225 };
3226
3227 #ifdef CONFIG_CIFS_SMB311
3228 struct smb_version_values smb311_values = {
3229         .version_string = SMB311_VERSION_STRING,
3230         .protocol_id = SMB311_PROT_ID,
3231         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3232         .large_lock_type = 0,
3233         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3234         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3235         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3236         .header_size = sizeof(struct smb2_hdr),
3237         .header_preamble_size = 4,
3238         .max_header_size = MAX_SMB2_HDR_SIZE,
3239         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3240         .lock_cmd = SMB2_LOCK,
3241         .cap_unix = 0,
3242         .cap_nt_find = SMB2_NT_FIND,
3243         .cap_large_files = SMB2_LARGE_FILES,
3244         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3245         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3246         .create_lease_size = sizeof(struct create_lease_v2),
3247 };
3248 #endif /* SMB311 */