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 "cifsglob.h"
  23 #include "smb2pdu.h"
  24 #include "smb2proto.h"
  25 #include "cifsproto.h"
  26 #include "cifs_debug.h"
  27 #include "cifs_unicode.h"
  28 #include "smb2status.h"
  29 #include "smb2glob.h"
  30
  31 static int
  32 change_conf(struct TCP_Server_Info *server)
  33 {
  34         server->credits += server->echo_credits + server->oplock_credits;
  35         server->oplock_credits = server->echo_credits = 0;
  36         switch (server->credits) {
  37         case 0:
  38                 return -1;
  39         case 1:
  40                 server->echoes = false;
  41                 server->oplocks = false;
  42                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
  43                 break;
  44         case 2:
  45                 server->echoes = true;
  46                 server->oplocks = false;
  47                 server->echo_credits = 1;
  48                 cifs_dbg(FYI, "disabling oplocks\n");
  49                 break;
  50         default:
  51                 server->echoes = true;
  52                 server->oplocks = true;
  53                 server->echo_credits = 1;
  54                 server->oplock_credits = 1;
  55         }
  56         server->credits -= server->echo_credits + server->oplock_credits;
  57         return 0;
  58 }
  59
  60 static void
  61 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  62                  const int optype)
  63 {
  64         int *val, rc = 0;
  65         spin_lock(&server->req_lock);
  66         val = server->ops->get_credits_field(server, optype);
  67         *val += add;
  68         server->in_flight--;
  69         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  70                 rc = change_conf(server);
  71         /*
  72          * Sometimes server returns 0 credits on oplock break ack - we need to
  73          * rebalance credits in this case.
  74          */
  75         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  76                  server->oplocks) {
  77                 if (server->credits > 1) {
  78                         server->credits--;
  79                         server->oplock_credits++;
  80                 }
  81         }
  82         spin_unlock(&server->req_lock);
  83         wake_up(&server->request_q);
  84         if (rc)
  85                 cifs_reconnect(server);
  86 }
  87
  88 static void
  89 smb2_set_credits(struct TCP_Server_Info *server, const int val)
  90 {
  91         spin_lock(&server->req_lock);
  92         server->credits = val;
  93         spin_unlock(&server->req_lock);
  94 }
  95
  96 static int *
  97 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
  98 {
  99         switch (optype) {
 100         case CIFS_ECHO_OP:
 101                 return &server->echo_credits;
 102         case CIFS_OBREAK_OP:
 103                 return &server->oplock_credits;
 104         default:
 105                 return &server->credits;
 106         }
 107 }
 108
 109 static unsigned int
 110 smb2_get_credits(struct mid_q_entry *mid)
 111 {
 112         return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
 113 }
 114
 115 static __u64
 116 smb2_get_next_mid(struct TCP_Server_Info *server)
 117 {
 118         __u64 mid;
 119         /* for SMB2 we need the current value */
 120         spin_lock(&GlobalMid_Lock);
 121         mid = server->CurrentMid++;
 122         spin_unlock(&GlobalMid_Lock);
 123         return mid;
 124 }
 125
 126 static struct mid_q_entry *
 127 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 128 {
 129         struct mid_q_entry *mid;
 130         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 131
 132         spin_lock(&GlobalMid_Lock);
 133         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 134                 if ((mid->mid == hdr->MessageId) &&
 135                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 136                     (mid->command == hdr->Command)) {
 137                         spin_unlock(&GlobalMid_Lock);
 138                         return mid;
 139                 }
 140         }
 141         spin_unlock(&GlobalMid_Lock);
 142         return NULL;
 143 }
 144
 145 static void
 146 smb2_dump_detail(void *buf)
 147 {
 148 #ifdef CONFIG_CIFS_DEBUG2
 149         struct smb2_hdr *smb = (struct smb2_hdr *)buf;
 150
 151         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 152                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
 153                  smb->ProcessId);
 154         cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
 155 #endif
 156 }
 157
 158 static bool
 159 smb2_need_neg(struct TCP_Server_Info *server)
 160 {
 161         return server->max_read == 0;
 162 }
 163
 164 static int
 165 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 166 {
 167         int rc;
 168         ses->server->CurrentMid = 0;
 169         rc = SMB2_negotiate(xid, ses);
 170         /* BB we probably don't need to retry with modern servers */
 171         if (rc == -EAGAIN)
 172                 rc = -EHOSTDOWN;
 173         return rc;
 174 }
 175
 176 static unsigned int
 177 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 178 {
 179         struct TCP_Server_Info *server = tcon->ses->server;
 180         unsigned int wsize;
 181
 182         /* start with specified wsize, or default */
 183         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 184         wsize = min_t(unsigned int, wsize, server->max_write);
 185         /*
 186          * limit write size to 2 ** 16, because we don't support multicredit
 187          * requests now.
 188          */
 189         wsize = min_t(unsigned int, wsize, 2 << 15);
 190
 191         return wsize;
 192 }
 193
 194 static unsigned int
 195 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 196 {
 197         struct TCP_Server_Info *server = tcon->ses->server;
 198         unsigned int rsize;
 199
 200         /* start with specified rsize, or default */
 201         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 202         rsize = min_t(unsigned int, rsize, server->max_read);
 203         /*
 204          * limit write size to 2 ** 16, because we don't support multicredit
 205          * requests now.
 206          */
 207         rsize = min_t(unsigned int, rsize, 2 << 15);
 208
 209         return rsize;
 210 }
 211
 212 #ifdef CONFIG_CIFS_STATS2
 213 static int
 214 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 215 {
 216         int rc;
 217         unsigned int ret_data_len = 0;
 218         struct network_interface_info_ioctl_rsp *out_buf;
 219
 220         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 221                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 222                         NULL /* no data input */, 0 /* no data input */,
 223                         (char **)&out_buf, &ret_data_len);
 224
 225         if ((rc == 0)  && (ret_data_len > 0)) {
 226                 /* Dump info on first interface */
 227                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 228                         le32_to_cpu(out_buf->Capability));
 229                 cifs_dbg(FYI, "Link Speed %lld\n",
 230                         le64_to_cpu(out_buf->LinkSpeed));
 231         } else
 232                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 233
 234         return rc;
 235 }
 236 #endif /* STATS2 */
 237
 238 static void
 239 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 240 {
 241         int rc;
 242         __le16 srch_path = 0; /* Null - open root of share */
 243         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 244         struct cifs_open_parms oparms;
 245         struct cifs_fid fid;
 246
 247         oparms.tcon = tcon;
 248         oparms.desired_access = FILE_READ_ATTRIBUTES;
 249         oparms.disposition = FILE_OPEN;
 250         oparms.create_options = 0;
 251         oparms.fid = &fid;
 252         oparms.reconnect = false;
 253
 254         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 255         if (rc)
 256                 return;
 257
 258 #ifdef CONFIG_CIFS_STATS2
 259         SMB3_request_interfaces(xid, tcon);
 260 #endif /* STATS2 */
 261
 262         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 263                         FS_ATTRIBUTE_INFORMATION);
 264         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 265                         FS_DEVICE_INFORMATION);
 266         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 267                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 268         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 269         return;
 270 }
 271
 272 static void
 273 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 274 {
 275         int rc;
 276         __le16 srch_path = 0; /* Null - open root of share */
 277         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 278         struct cifs_open_parms oparms;
 279         struct cifs_fid fid;
 280
 281         oparms.tcon = tcon;
 282         oparms.desired_access = FILE_READ_ATTRIBUTES;
 283         oparms.disposition = FILE_OPEN;
 284         oparms.create_options = 0;
 285         oparms.fid = &fid;
 286         oparms.reconnect = false;
 287
 288         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 289         if (rc)
 290                 return;
 291
 292         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 293                         FS_ATTRIBUTE_INFORMATION);
 294         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 295                         FS_DEVICE_INFORMATION);
 296         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 297         return;
 298 }
 299
 300 static int
 301 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 302                         struct cifs_sb_info *cifs_sb, const char *full_path)
 303 {
 304         int rc;
 305         __le16 *utf16_path;
 306         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 307         struct cifs_open_parms oparms;
 308         struct cifs_fid fid;
 309
 310         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 311         if (!utf16_path)
 312                 return -ENOMEM;
 313
 314         oparms.tcon = tcon;
 315         oparms.desired_access = FILE_READ_ATTRIBUTES;
 316         oparms.disposition = FILE_OPEN;
 317         oparms.create_options = 0;
 318         oparms.fid = &fid;
 319         oparms.reconnect = false;
 320
 321         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 322         if (rc) {
 323                 kfree(utf16_path);
 324                 return rc;
 325         }
 326
 327         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 328         kfree(utf16_path);
 329         return rc;
 330 }
 331
 332 static int
 333 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 334                   struct cifs_sb_info *cifs_sb, const char *full_path,
 335                   u64 *uniqueid, FILE_ALL_INFO *data)
 336 {
 337         *uniqueid = le64_to_cpu(data->IndexNumber);
 338         return 0;
 339 }
 340
 341 static int
 342 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 343                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 344 {
 345         int rc;
 346         struct smb2_file_all_info *smb2_data;
 347
 348         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
 349                             GFP_KERNEL);
 350         if (smb2_data == NULL)
 351                 return -ENOMEM;
 352
 353         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 354                              smb2_data);
 355         if (!rc)
 356                 move_smb2_info_to_cifs(data, smb2_data);
 357         kfree(smb2_data);
 358         return rc;
 359 }
 360
 361 static bool
 362 smb2_can_echo(struct TCP_Server_Info *server)
 363 {
 364         return server->echoes;
 365 }
 366
 367 static void
 368 smb2_clear_stats(struct cifs_tcon *tcon)
 369 {
 370 #ifdef CONFIG_CIFS_STATS
 371         int i;
 372         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 373                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 374                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 375         }
 376 #endif
 377 }
 378
 379 static void
 380 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 381 {
 382         seq_puts(m, "\n\tShare Capabilities:");
 383         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 384                 seq_puts(m, " DFS,");
 385         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 386                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 387         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 388                 seq_puts(m, " SCALEOUT,");
 389         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 390                 seq_puts(m, " CLUSTER,");
 391         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 392                 seq_puts(m, " ASYMMETRIC,");
 393         if (tcon->capabilities == 0)
 394                 seq_puts(m, " None");
 395         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 396                 seq_puts(m, " Aligned,");
 397         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 398                 seq_puts(m, " Partition Aligned,");
 399         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 400                 seq_puts(m, " SSD,");
 401         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 402                 seq_puts(m, " TRIM-support,");
 403
 404         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 405         if (tcon->perf_sector_size)
 406                 seq_printf(m, "\tOptimal sector size: 0x%x",
 407                            tcon->perf_sector_size);
 408 }
 409
 410 static void
 411 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 412 {
 413 #ifdef CONFIG_CIFS_STATS
 414         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 415         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 416         seq_printf(m, "\nNegotiates: %d sent %d failed",
 417                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 418                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 419         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 420                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 421                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 422         seq_printf(m, "\nLogoffs: %d sent %d failed",
 423                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 424                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 425         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 426                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 427                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 428         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 429                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 430                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 431         seq_printf(m, "\nCreates: %d sent %d failed",
 432                    atomic_read(&sent[SMB2_CREATE_HE]),
 433                    atomic_read(&failed[SMB2_CREATE_HE]));
 434         seq_printf(m, "\nCloses: %d sent %d failed",
 435                    atomic_read(&sent[SMB2_CLOSE_HE]),
 436                    atomic_read(&failed[SMB2_CLOSE_HE]));
 437         seq_printf(m, "\nFlushes: %d sent %d failed",
 438                    atomic_read(&sent[SMB2_FLUSH_HE]),
 439                    atomic_read(&failed[SMB2_FLUSH_HE]));
 440         seq_printf(m, "\nReads: %d sent %d failed",
 441                    atomic_read(&sent[SMB2_READ_HE]),
 442                    atomic_read(&failed[SMB2_READ_HE]));
 443         seq_printf(m, "\nWrites: %d sent %d failed",
 444                    atomic_read(&sent[SMB2_WRITE_HE]),
 445                    atomic_read(&failed[SMB2_WRITE_HE]));
 446         seq_printf(m, "\nLocks: %d sent %d failed",
 447                    atomic_read(&sent[SMB2_LOCK_HE]),
 448                    atomic_read(&failed[SMB2_LOCK_HE]));
 449         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 450                    atomic_read(&sent[SMB2_IOCTL_HE]),
 451                    atomic_read(&failed[SMB2_IOCTL_HE]));
 452         seq_printf(m, "\nCancels: %d sent %d failed",
 453                    atomic_read(&sent[SMB2_CANCEL_HE]),
 454                    atomic_read(&failed[SMB2_CANCEL_HE]));
 455         seq_printf(m, "\nEchos: %d sent %d failed",
 456                    atomic_read(&sent[SMB2_ECHO_HE]),
 457                    atomic_read(&failed[SMB2_ECHO_HE]));
 458         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 459                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 460                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 461         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 462                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 463                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 464         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 465                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 466                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 467         seq_printf(m, "\nSetInfos: %d sent %d failed",
 468                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 469                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 470         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 471                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 472                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 473 #endif
 474 }
 475
 476 static void
 477 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 478 {
 479         struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
 480         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 481
 482         cfile->fid.persistent_fid = fid->persistent_fid;
 483         cfile->fid.volatile_fid = fid->volatile_fid;
 484         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 485                                       &fid->purge_cache);
 486         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 487 }
 488
 489 static void
 490 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 491                 struct cifs_fid *fid)
 492 {
 493         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 494 }
 495
 496 static int
 497 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 498                      u64 persistent_fid, u64 volatile_fid,
 499                      struct copychunk_ioctl *pcchunk)
 500 {
 501         int rc;
 502         unsigned int ret_data_len;
 503         struct resume_key_req *res_key;
 504
 505         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 506                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 507                         NULL, 0 /* no input */,
 508                         (char **)&res_key, &ret_data_len);
 509
 510         if (rc) {
 511                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 512                 goto req_res_key_exit;
 513         }
 514         if (ret_data_len < sizeof(struct resume_key_req)) {
 515                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 516                 rc = -EINVAL;
 517                 goto req_res_key_exit;
 518         }
 519         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 520
 521 req_res_key_exit:
 522         kfree(res_key);
 523         return rc;
 524 }
 525
 526 static int
 527 smb2_clone_range(const unsigned int xid,
 528                         struct cifsFileInfo *srcfile,
 529                         struct cifsFileInfo *trgtfile, u64 src_off,
 530                         u64 len, u64 dest_off)
 531 {
 532         int rc;
 533         unsigned int ret_data_len;
 534         struct copychunk_ioctl *pcchunk;
 535         struct copychunk_ioctl_rsp *retbuf = NULL;
 536         struct cifs_tcon *tcon;
 537         int chunks_copied = 0;
 538         bool chunk_sizes_updated = false;
 539
 540         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 541
 542         if (pcchunk == NULL)
 543                 return -ENOMEM;
 544
 545         cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
 546         /* Request a key from the server to identify the source of the copy */
 547         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 548                                 srcfile->fid.persistent_fid,
 549                                 srcfile->fid.volatile_fid, pcchunk);
 550
 551         /* Note: request_res_key sets res_key null only if rc !=0 */
 552         if (rc)
 553                 goto cchunk_out;
 554
 555         /* For now array only one chunk long, will make more flexible later */
 556         pcchunk->ChunkCount = __constant_cpu_to_le32(1);
 557         pcchunk->Reserved = 0;
 558         pcchunk->Reserved2 = 0;
 559
 560         tcon = tlink_tcon(trgtfile->tlink);
 561
 562         while (len > 0) {
 563                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 564                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 565                 pcchunk->Length =
 566                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 567
 568                 /* Request server copy to target from src identified by key */
 569                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 570                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 571                         true /* is_fsctl */, (char *)pcchunk,
 572                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 573                         &ret_data_len);
 574                 if (rc == 0) {
 575                         if (ret_data_len !=
 576                                         sizeof(struct copychunk_ioctl_rsp)) {
 577                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 578                                 rc = -EIO;
 579                                 goto cchunk_out;
 580                         }
 581                         if (retbuf->TotalBytesWritten == 0) {
 582                                 cifs_dbg(FYI, "no bytes copied\n");
 583                                 rc = -EIO;
 584                                 goto cchunk_out;
 585                         }
 586                         /*
 587                          * Check if server claimed to write more than we asked
 588                          */
 589                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 590                             le32_to_cpu(pcchunk->Length)) {
 591                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 592                                 rc = -EIO;
 593                                 goto cchunk_out;
 594                         }
 595                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 596                                 cifs_dbg(VFS, "invalid num chunks written\n");
 597                                 rc = -EIO;
 598                                 goto cchunk_out;
 599                         }
 600                         chunks_copied++;
 601
 602                         src_off += le32_to_cpu(retbuf->TotalBytesWritten);
 603                         dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
 604                         len -= le32_to_cpu(retbuf->TotalBytesWritten);
 605
 606                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
 607                                 le32_to_cpu(retbuf->ChunksWritten),
 608                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 609                                 le32_to_cpu(retbuf->TotalBytesWritten));
 610                 } else if (rc == -EINVAL) {
 611                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 612                                 goto cchunk_out;
 613
 614                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 615                                 le32_to_cpu(retbuf->ChunksWritten),
 616                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 617                                 le32_to_cpu(retbuf->TotalBytesWritten));
 618
 619                         /*
 620                          * Check if this is the first request using these sizes,
 621                          * (ie check if copy succeed once with original sizes
 622                          * and check if the server gave us different sizes after
 623                          * we already updated max sizes on previous request).
 624                          * if not then why is the server returning an error now
 625                          */
 626                         if ((chunks_copied != 0) || chunk_sizes_updated)
 627                                 goto cchunk_out;
 628
 629                         /* Check that server is not asking us to grow size */
 630                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 631                                         tcon->max_bytes_chunk)
 632                                 tcon->max_bytes_chunk =
 633                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 634                         else
 635                                 goto cchunk_out; /* server gave us bogus size */
 636
 637                         /* No need to change MaxChunks since already set to 1 */
 638                         chunk_sizes_updated = true;
 639                 }
 640         }
 641
 642 cchunk_out:
 643         kfree(pcchunk);
 644         return rc;
 645 }
 646
 647 static int
 648 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 649                 struct cifs_fid *fid)
 650 {
 651         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 652 }
 653
 654 static unsigned int
 655 smb2_read_data_offset(char *buf)
 656 {
 657         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 658         return rsp->DataOffset;
 659 }
 660
 661 static unsigned int
 662 smb2_read_data_length(char *buf)
 663 {
 664         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 665         return le32_to_cpu(rsp->DataLength);
 666 }
 667
 668
 669 static int
 670 smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
 671                struct cifs_io_parms *parms, unsigned int *bytes_read,
 672                char **buf, int *buf_type)
 673 {
 674         parms->persistent_fid = cfile->fid.persistent_fid;
 675         parms->volatile_fid = cfile->fid.volatile_fid;
 676         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 677 }
 678
 679 static int
 680 smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
 681                 struct cifs_io_parms *parms, unsigned int *written,
 682                 struct kvec *iov, unsigned long nr_segs)
 683 {
 684
 685         parms->persistent_fid = cfile->fid.persistent_fid;
 686         parms->volatile_fid = cfile->fid.volatile_fid;
 687         return SMB2_write(xid, parms, written, iov, nr_segs);
 688 }
 689
 690 static int
 691 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 692                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 693 {
 694         __le64 eof = cpu_to_le64(size);
 695         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 696                             cfile->fid.volatile_fid, cfile->pid, &eof);
 697 }
 698
 699 static int
 700 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 701                    struct cifsFileInfo *cfile)
 702 {
 703         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 704                             cfile->fid.volatile_fid);
 705 }
 706
 707 static int
 708 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 709                      const char *path, struct cifs_sb_info *cifs_sb,
 710                      struct cifs_fid *fid, __u16 search_flags,
 711                      struct cifs_search_info *srch_inf)
 712 {
 713         __le16 *utf16_path;
 714         int rc;
 715         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 716         struct cifs_open_parms oparms;
 717
 718         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 719         if (!utf16_path)
 720                 return -ENOMEM;
 721
 722         oparms.tcon = tcon;
 723         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 724         oparms.disposition = FILE_OPEN;
 725         oparms.create_options = 0;
 726         oparms.fid = fid;
 727         oparms.reconnect = false;
 728
 729         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 730         kfree(utf16_path);
 731         if (rc) {
 732                 cifs_dbg(VFS, "open dir failed\n");
 733                 return rc;
 734         }
 735
 736         srch_inf->entries_in_buffer = 0;
 737         srch_inf->index_of_last_entry = 0;
 738
 739         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 740                                   fid->volatile_fid, 0, srch_inf);
 741         if (rc) {
 742                 cifs_dbg(VFS, "query directory failed\n");
 743                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 744         }
 745         return rc;
 746 }
 747
 748 static int
 749 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 750                     struct cifs_fid *fid, __u16 search_flags,
 751                     struct cifs_search_info *srch_inf)
 752 {
 753         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 754                                     fid->volatile_fid, 0, srch_inf);
 755 }
 756
 757 static int
 758 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 759                struct cifs_fid *fid)
 760 {
 761         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 762 }
 763
 764 /*
 765 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 766 * the number of credits and return true. Otherwise - return false.
 767 */
 768 static bool
 769 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 770 {
 771         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 772
 773         if (hdr->Status != STATUS_PENDING)
 774                 return false;
 775
 776         if (!length) {
 777                 spin_lock(&server->req_lock);
 778                 server->credits += le16_to_cpu(hdr->CreditRequest);
 779                 spin_unlock(&server->req_lock);
 780                 wake_up(&server->request_q);
 781         }
 782
 783         return true;
 784 }
 785
 786 static int
 787 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 788                      struct cifsInodeInfo *cinode)
 789 {
 790         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 791                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 792                                         smb2_get_lease_state(cinode));
 793
 794         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 795                                  fid->volatile_fid,
 796                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 797 }
 798
 799 static int
 800 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 801              struct kstatfs *buf)
 802 {
 803         int rc;
 804         __le16 srch_path = 0; /* Null - open root of share */
 805         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 806         struct cifs_open_parms oparms;
 807         struct cifs_fid fid;
 808
 809         oparms.tcon = tcon;
 810         oparms.desired_access = FILE_READ_ATTRIBUTES;
 811         oparms.disposition = FILE_OPEN;
 812         oparms.create_options = 0;
 813         oparms.fid = &fid;
 814         oparms.reconnect = false;
 815
 816         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 817         if (rc)
 818                 return rc;
 819         buf->f_type = SMB2_MAGIC_NUMBER;
 820         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 821                            buf);
 822         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 823         return rc;
 824 }
 825
 826 static bool
 827 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
 828 {
 829         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
 830                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
 831 }
 832
 833 static int
 834 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
 835                __u64 length, __u32 type, int lock, int unlock, bool wait)
 836 {
 837         if (unlock && !lock)
 838                 type = SMB2_LOCKFLAG_UNLOCK;
 839         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
 840                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
 841                          current->tgid, length, offset, type, wait);
 842 }
 843
 844 static void
 845 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
 846 {
 847         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
 848 }
 849
 850 static void
 851 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
 852 {
 853         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
 854 }
 855
 856 static void
 857 smb2_new_lease_key(struct cifs_fid *fid)
 858 {
 859         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
 860 }
 861
 862 static int
 863 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
 864                    const char *full_path, char **target_path,
 865                    struct cifs_sb_info *cifs_sb)
 866 {
 867         int rc;
 868         __le16 *utf16_path;
 869         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 870         struct cifs_open_parms oparms;
 871         struct cifs_fid fid;
 872         struct smb2_err_rsp *err_buf = NULL;
 873         struct smb2_symlink_err_rsp *symlink;
 874         unsigned int sub_len, sub_offset;
 875
 876         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
 877
 878         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 879         if (!utf16_path)
 880                 return -ENOMEM;
 881
 882         oparms.tcon = tcon;
 883         oparms.desired_access = FILE_READ_ATTRIBUTES;
 884         oparms.disposition = FILE_OPEN;
 885         oparms.create_options = 0;
 886         oparms.fid = &fid;
 887         oparms.reconnect = false;
 888
 889         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
 890
 891         if (!rc || !err_buf) {
 892                 kfree(utf16_path);
 893                 return -ENOENT;
 894         }
 895         /* open must fail on symlink - reset rc */
 896         rc = 0;
 897         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
 898         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
 899         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
 900         *target_path = cifs_strndup_from_utf16(
 901                                 (char *)symlink->PathBuffer + sub_offset,
 902                                 sub_len, true, cifs_sb->local_nls);
 903         if (!(*target_path)) {
 904                 kfree(utf16_path);
 905                 return -ENOMEM;
 906         }
 907         convert_delimiter(*target_path, '/');
 908         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
 909         kfree(utf16_path);
 910         return rc;
 911 }
 912
 913 static void
 914 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 915                       unsigned int epoch, bool *purge_cache)
 916 {
 917         oplock &= 0xFF;
 918         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
 919                 return;
 920         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
 921                 cinode->oplock = CIFS_CACHE_RHW_FLG;
 922                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
 923                          &cinode->vfs_inode);
 924         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
 925                 cinode->oplock = CIFS_CACHE_RW_FLG;
 926                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
 927                          &cinode->vfs_inode);
 928         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
 929                 cinode->oplock = CIFS_CACHE_READ_FLG;
 930                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
 931                          &cinode->vfs_inode);
 932         } else
 933                 cinode->oplock = 0;
 934 }
 935
 936 static void
 937 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 938                        unsigned int epoch, bool *purge_cache)
 939 {
 940         char message[5] = {0};
 941
 942         oplock &= 0xFF;
 943         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
 944                 return;
 945
 946         cinode->oplock = 0;
 947         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
 948                 cinode->oplock |= CIFS_CACHE_READ_FLG;
 949                 strcat(message, "R");
 950         }
 951         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
 952                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
 953                 strcat(message, "H");
 954         }
 955         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
 956                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
 957                 strcat(message, "W");
 958         }
 959         if (!cinode->oplock)
 960                 strcat(message, "None");
 961         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
 962                  &cinode->vfs_inode);
 963 }
 964
 965 static void
 966 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 967                       unsigned int epoch, bool *purge_cache)
 968 {
 969         unsigned int old_oplock = cinode->oplock;
 970
 971         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
 972
 973         if (purge_cache) {
 974                 *purge_cache = false;
 975                 if (old_oplock == CIFS_CACHE_READ_FLG) {
 976                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
 977                             (epoch - cinode->epoch > 0))
 978                                 *purge_cache = true;
 979                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
 980                                  (epoch - cinode->epoch > 1))
 981                                 *purge_cache = true;
 982                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
 983                                  (epoch - cinode->epoch > 1))
 984                                 *purge_cache = true;
 985                         else if (cinode->oplock == 0 &&
 986                                  (epoch - cinode->epoch > 0))
 987                                 *purge_cache = true;
 988                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
 989                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
 990                             (epoch - cinode->epoch > 0))
 991                                 *purge_cache = true;
 992                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
 993                                  (epoch - cinode->epoch > 1))
 994                                 *purge_cache = true;
 995                 }
 996                 cinode->epoch = epoch;
 997         }
 998 }
 999
1000 static bool
1001 smb2_is_read_op(__u32 oplock)
1002 {
1003         return oplock == SMB2_OPLOCK_LEVEL_II;
1004 }
1005
1006 static bool
1007 smb21_is_read_op(__u32 oplock)
1008 {
1009         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1010                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1011 }
1012
1013 static __le32
1014 map_oplock_to_lease(u8 oplock)
1015 {
1016         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1017                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1018         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1019                 return SMB2_LEASE_READ_CACHING;
1020         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1021                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1022                        SMB2_LEASE_WRITE_CACHING;
1023         return 0;
1024 }
1025
1026 static char *
1027 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1028 {
1029         struct create_lease *buf;
1030
1031         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1032         if (!buf)
1033                 return NULL;
1034
1035         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1036         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1037         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1038
1039         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1040                                         (struct create_lease, lcontext));
1041         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1042         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1043                                 (struct create_lease, Name));
1044         buf->ccontext.NameLength = cpu_to_le16(4);
1045         buf->Name[0] = 'R';
1046         buf->Name[1] = 'q';
1047         buf->Name[2] = 'L';
1048         buf->Name[3] = 's';
1049         return (char *)buf;
1050 }
1051
1052 static char *
1053 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1054 {
1055         struct create_lease_v2 *buf;
1056
1057         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1058         if (!buf)
1059                 return NULL;
1060
1061         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1062         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1063         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1064
1065         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1066                                         (struct create_lease_v2, lcontext));
1067         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1068         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1069                                 (struct create_lease_v2, Name));
1070         buf->ccontext.NameLength = cpu_to_le16(4);
1071         buf->Name[0] = 'R';
1072         buf->Name[1] = 'q';
1073         buf->Name[2] = 'L';
1074         buf->Name[3] = 's';
1075         return (char *)buf;
1076 }
1077
1078 static __u8
1079 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1080 {
1081         struct create_lease *lc = (struct create_lease *)buf;
1082
1083         *epoch = 0; /* not used */
1084         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1085                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1086         return le32_to_cpu(lc->lcontext.LeaseState);
1087 }
1088
1089 static __u8
1090 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1091 {
1092         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1093
1094         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1095         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1096                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1097         return le32_to_cpu(lc->lcontext.LeaseState);
1098 }
1099
1100 struct smb_version_operations smb20_operations = {
1101         .compare_fids = smb2_compare_fids,
1102         .setup_request = smb2_setup_request,
1103         .setup_async_request = smb2_setup_async_request,
1104         .check_receive = smb2_check_receive,
1105         .add_credits = smb2_add_credits,
1106         .set_credits = smb2_set_credits,
1107         .get_credits_field = smb2_get_credits_field,
1108         .get_credits = smb2_get_credits,
1109         .get_next_mid = smb2_get_next_mid,
1110         .read_data_offset = smb2_read_data_offset,
1111         .read_data_length = smb2_read_data_length,
1112         .map_error = map_smb2_to_linux_error,
1113         .find_mid = smb2_find_mid,
1114         .check_message = smb2_check_message,
1115         .dump_detail = smb2_dump_detail,
1116         .clear_stats = smb2_clear_stats,
1117         .print_stats = smb2_print_stats,
1118         .is_oplock_break = smb2_is_valid_oplock_break,
1119         .need_neg = smb2_need_neg,
1120         .negotiate = smb2_negotiate,
1121         .negotiate_wsize = smb2_negotiate_wsize,
1122         .negotiate_rsize = smb2_negotiate_rsize,
1123         .sess_setup = SMB2_sess_setup,
1124         .logoff = SMB2_logoff,
1125         .tree_connect = SMB2_tcon,
1126         .tree_disconnect = SMB2_tdis,
1127         .qfs_tcon = smb2_qfs_tcon,
1128         .is_path_accessible = smb2_is_path_accessible,
1129         .can_echo = smb2_can_echo,
1130         .echo = SMB2_echo,
1131         .query_path_info = smb2_query_path_info,
1132         .get_srv_inum = smb2_get_srv_inum,
1133         .query_file_info = smb2_query_file_info,
1134         .set_path_size = smb2_set_path_size,
1135         .set_file_size = smb2_set_file_size,
1136         .set_file_info = smb2_set_file_info,
1137         .set_compression = smb2_set_compression,
1138         .mkdir = smb2_mkdir,
1139         .mkdir_setinfo = smb2_mkdir_setinfo,
1140         .rmdir = smb2_rmdir,
1141         .unlink = smb2_unlink,
1142         .rename = smb2_rename_path,
1143         .create_hardlink = smb2_create_hardlink,
1144         .query_symlink = smb2_query_symlink,
1145         .open = smb2_open_file,
1146         .set_fid = smb2_set_fid,
1147         .close = smb2_close_file,
1148         .flush = smb2_flush_file,
1149         .async_readv = smb2_async_readv,
1150         .async_writev = smb2_async_writev,
1151         .sync_read = smb2_sync_read,
1152         .sync_write = smb2_sync_write,
1153         .query_dir_first = smb2_query_dir_first,
1154         .query_dir_next = smb2_query_dir_next,
1155         .close_dir = smb2_close_dir,
1156         .calc_smb_size = smb2_calc_size,
1157         .is_status_pending = smb2_is_status_pending,
1158         .oplock_response = smb2_oplock_response,
1159         .queryfs = smb2_queryfs,
1160         .mand_lock = smb2_mand_lock,
1161         .mand_unlock_range = smb2_unlock_range,
1162         .push_mand_locks = smb2_push_mandatory_locks,
1163         .get_lease_key = smb2_get_lease_key,
1164         .set_lease_key = smb2_set_lease_key,
1165         .new_lease_key = smb2_new_lease_key,
1166         .calc_signature = smb2_calc_signature,
1167         .is_read_op = smb2_is_read_op,
1168         .set_oplock_level = smb2_set_oplock_level,
1169         .create_lease_buf = smb2_create_lease_buf,
1170         .parse_lease_buf = smb2_parse_lease_buf,
1171         .clone_range = smb2_clone_range,
1172 };
1173
1174 struct smb_version_operations smb21_operations = {
1175         .compare_fids = smb2_compare_fids,
1176         .setup_request = smb2_setup_request,
1177         .setup_async_request = smb2_setup_async_request,
1178         .check_receive = smb2_check_receive,
1179         .add_credits = smb2_add_credits,
1180         .set_credits = smb2_set_credits,
1181         .get_credits_field = smb2_get_credits_field,
1182         .get_credits = smb2_get_credits,
1183         .get_next_mid = smb2_get_next_mid,
1184         .read_data_offset = smb2_read_data_offset,
1185         .read_data_length = smb2_read_data_length,
1186         .map_error = map_smb2_to_linux_error,
1187         .find_mid = smb2_find_mid,
1188         .check_message = smb2_check_message,
1189         .dump_detail = smb2_dump_detail,
1190         .clear_stats = smb2_clear_stats,
1191         .print_stats = smb2_print_stats,
1192         .is_oplock_break = smb2_is_valid_oplock_break,
1193         .need_neg = smb2_need_neg,
1194         .negotiate = smb2_negotiate,
1195         .negotiate_wsize = smb2_negotiate_wsize,
1196         .negotiate_rsize = smb2_negotiate_rsize,
1197         .sess_setup = SMB2_sess_setup,
1198         .logoff = SMB2_logoff,
1199         .tree_connect = SMB2_tcon,
1200         .tree_disconnect = SMB2_tdis,
1201         .qfs_tcon = smb2_qfs_tcon,
1202         .is_path_accessible = smb2_is_path_accessible,
1203         .can_echo = smb2_can_echo,
1204         .echo = SMB2_echo,
1205         .query_path_info = smb2_query_path_info,
1206         .get_srv_inum = smb2_get_srv_inum,
1207         .query_file_info = smb2_query_file_info,
1208         .set_path_size = smb2_set_path_size,
1209         .set_file_size = smb2_set_file_size,
1210         .set_file_info = smb2_set_file_info,
1211         .set_compression = smb2_set_compression,
1212         .mkdir = smb2_mkdir,
1213         .mkdir_setinfo = smb2_mkdir_setinfo,
1214         .rmdir = smb2_rmdir,
1215         .unlink = smb2_unlink,
1216         .rename = smb2_rename_path,
1217         .create_hardlink = smb2_create_hardlink,
1218         .query_symlink = smb2_query_symlink,
1219         .open = smb2_open_file,
1220         .set_fid = smb2_set_fid,
1221         .close = smb2_close_file,
1222         .flush = smb2_flush_file,
1223         .async_readv = smb2_async_readv,
1224         .async_writev = smb2_async_writev,
1225         .sync_read = smb2_sync_read,
1226         .sync_write = smb2_sync_write,
1227         .query_dir_first = smb2_query_dir_first,
1228         .query_dir_next = smb2_query_dir_next,
1229         .close_dir = smb2_close_dir,
1230         .calc_smb_size = smb2_calc_size,
1231         .is_status_pending = smb2_is_status_pending,
1232         .oplock_response = smb2_oplock_response,
1233         .queryfs = smb2_queryfs,
1234         .mand_lock = smb2_mand_lock,
1235         .mand_unlock_range = smb2_unlock_range,
1236         .push_mand_locks = smb2_push_mandatory_locks,
1237         .get_lease_key = smb2_get_lease_key,
1238         .set_lease_key = smb2_set_lease_key,
1239         .new_lease_key = smb2_new_lease_key,
1240         .calc_signature = smb2_calc_signature,
1241         .is_read_op = smb21_is_read_op,
1242         .set_oplock_level = smb21_set_oplock_level,
1243         .create_lease_buf = smb2_create_lease_buf,
1244         .parse_lease_buf = smb2_parse_lease_buf,
1245         .clone_range = smb2_clone_range,
1246 };
1247
1248 struct smb_version_operations smb30_operations = {
1249         .compare_fids = smb2_compare_fids,
1250         .setup_request = smb2_setup_request,
1251         .setup_async_request = smb2_setup_async_request,
1252         .check_receive = smb2_check_receive,
1253         .add_credits = smb2_add_credits,
1254         .set_credits = smb2_set_credits,
1255         .get_credits_field = smb2_get_credits_field,
1256         .get_credits = smb2_get_credits,
1257         .get_next_mid = smb2_get_next_mid,
1258         .read_data_offset = smb2_read_data_offset,
1259         .read_data_length = smb2_read_data_length,
1260         .map_error = map_smb2_to_linux_error,
1261         .find_mid = smb2_find_mid,
1262         .check_message = smb2_check_message,
1263         .dump_detail = smb2_dump_detail,
1264         .clear_stats = smb2_clear_stats,
1265         .print_stats = smb2_print_stats,
1266         .dump_share_caps = smb2_dump_share_caps,
1267         .is_oplock_break = smb2_is_valid_oplock_break,
1268         .need_neg = smb2_need_neg,
1269         .negotiate = smb2_negotiate,
1270         .negotiate_wsize = smb2_negotiate_wsize,
1271         .negotiate_rsize = smb2_negotiate_rsize,
1272         .sess_setup = SMB2_sess_setup,
1273         .logoff = SMB2_logoff,
1274         .tree_connect = SMB2_tcon,
1275         .tree_disconnect = SMB2_tdis,
1276         .qfs_tcon = smb3_qfs_tcon,
1277         .is_path_accessible = smb2_is_path_accessible,
1278         .can_echo = smb2_can_echo,
1279         .echo = SMB2_echo,
1280         .query_path_info = smb2_query_path_info,
1281         .get_srv_inum = smb2_get_srv_inum,
1282         .query_file_info = smb2_query_file_info,
1283         .set_path_size = smb2_set_path_size,
1284         .set_file_size = smb2_set_file_size,
1285         .set_file_info = smb2_set_file_info,
1286         .set_compression = smb2_set_compression,
1287         .mkdir = smb2_mkdir,
1288         .mkdir_setinfo = smb2_mkdir_setinfo,
1289         .rmdir = smb2_rmdir,
1290         .unlink = smb2_unlink,
1291         .rename = smb2_rename_path,
1292         .create_hardlink = smb2_create_hardlink,
1293         .query_symlink = smb2_query_symlink,
1294         .open = smb2_open_file,
1295         .set_fid = smb2_set_fid,
1296         .close = smb2_close_file,
1297         .flush = smb2_flush_file,
1298         .async_readv = smb2_async_readv,
1299         .async_writev = smb2_async_writev,
1300         .sync_read = smb2_sync_read,
1301         .sync_write = smb2_sync_write,
1302         .query_dir_first = smb2_query_dir_first,
1303         .query_dir_next = smb2_query_dir_next,
1304         .close_dir = smb2_close_dir,
1305         .calc_smb_size = smb2_calc_size,
1306         .is_status_pending = smb2_is_status_pending,
1307         .oplock_response = smb2_oplock_response,
1308         .queryfs = smb2_queryfs,
1309         .mand_lock = smb2_mand_lock,
1310         .mand_unlock_range = smb2_unlock_range,
1311         .push_mand_locks = smb2_push_mandatory_locks,
1312         .get_lease_key = smb2_get_lease_key,
1313         .set_lease_key = smb2_set_lease_key,
1314         .new_lease_key = smb2_new_lease_key,
1315         .generate_signingkey = generate_smb3signingkey,
1316         .calc_signature = smb3_calc_signature,
1317         .is_read_op = smb21_is_read_op,
1318         .set_oplock_level = smb3_set_oplock_level,
1319         .create_lease_buf = smb3_create_lease_buf,
1320         .parse_lease_buf = smb3_parse_lease_buf,
1321         .clone_range = smb2_clone_range,
1322         .validate_negotiate = smb3_validate_negotiate,
1323 };
1324
1325 struct smb_version_values smb20_values = {
1326         .version_string = SMB20_VERSION_STRING,
1327         .protocol_id = SMB20_PROT_ID,
1328         .req_capabilities = 0, /* MBZ */
1329         .large_lock_type = 0,
1330         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1331         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1332         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1333         .header_size = sizeof(struct smb2_hdr),
1334         .max_header_size = MAX_SMB2_HDR_SIZE,
1335         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1336         .lock_cmd = SMB2_LOCK,
1337         .cap_unix = 0,
1338         .cap_nt_find = SMB2_NT_FIND,
1339         .cap_large_files = SMB2_LARGE_FILES,
1340         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1341         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1342         .create_lease_size = sizeof(struct create_lease),
1343 };
1344
1345 struct smb_version_values smb21_values = {
1346         .version_string = SMB21_VERSION_STRING,
1347         .protocol_id = SMB21_PROT_ID,
1348         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1349         .large_lock_type = 0,
1350         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1351         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1352         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1353         .header_size = sizeof(struct smb2_hdr),
1354         .max_header_size = MAX_SMB2_HDR_SIZE,
1355         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1356         .lock_cmd = SMB2_LOCK,
1357         .cap_unix = 0,
1358         .cap_nt_find = SMB2_NT_FIND,
1359         .cap_large_files = SMB2_LARGE_FILES,
1360         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1361         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1362         .create_lease_size = sizeof(struct create_lease),
1363 };
1364
1365 struct smb_version_values smb30_values = {
1366         .version_string = SMB30_VERSION_STRING,
1367         .protocol_id = SMB30_PROT_ID,
1368         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1369         .large_lock_type = 0,
1370         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1371         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1372         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1373         .header_size = sizeof(struct smb2_hdr),
1374         .max_header_size = MAX_SMB2_HDR_SIZE,
1375         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1376         .lock_cmd = SMB2_LOCK,
1377         .cap_unix = 0,
1378         .cap_nt_find = SMB2_NT_FIND,
1379         .cap_large_files = SMB2_LARGE_FILES,
1380         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1381         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1382         .create_lease_size = sizeof(struct create_lease_v2),
1383 };
1384
1385 struct smb_version_values smb302_values = {
1386         .version_string = SMB302_VERSION_STRING,
1387         .protocol_id = SMB302_PROT_ID,
1388         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1389         .large_lock_type = 0,
1390         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1391         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1392         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1393         .header_size = sizeof(struct smb2_hdr),
1394         .max_header_size = MAX_SMB2_HDR_SIZE,
1395         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1396         .lock_cmd = SMB2_LOCK,
1397         .cap_unix = 0,
1398         .cap_nt_find = SMB2_NT_FIND,
1399         .cap_large_files = SMB2_LARGE_FILES,
1400         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1401         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1402         .create_lease_size = sizeof(struct create_lease_v2),
1403 };