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         /* set it to the maximum buffer size value we can send with 1 credit */
 186         wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 187
 188         return wsize;
 189 }
 190
 191 static unsigned int
 192 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 193 {
 194         struct TCP_Server_Info *server = tcon->ses->server;
 195         unsigned int rsize;
 196
 197         /* start with specified rsize, or default */
 198         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 199         rsize = min_t(unsigned int, rsize, server->max_read);
 200         /* set it to the maximum buffer size value we can send with 1 credit */
 201         rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 202
 203         return rsize;
 204 }
 205
 206 #ifdef CONFIG_CIFS_STATS2
 207 static int
 208 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 209 {
 210         int rc;
 211         unsigned int ret_data_len = 0;
 212         struct network_interface_info_ioctl_rsp *out_buf;
 213
 214         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 215                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 216                         NULL /* no data input */, 0 /* no data input */,
 217                         (char **)&out_buf, &ret_data_len);
 218
 219         if ((rc == 0)  && (ret_data_len > 0)) {
 220                 /* Dump info on first interface */
 221                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 222                         le32_to_cpu(out_buf->Capability));
 223                 cifs_dbg(FYI, "Link Speed %lld\n",
 224                         le64_to_cpu(out_buf->LinkSpeed));
 225         } else
 226                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 227
 228         return rc;
 229 }
 230 #endif /* STATS2 */
 231
 232 static void
 233 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 234 {
 235         int rc;
 236         __le16 srch_path = 0; /* Null - open root of share */
 237         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 238         struct cifs_open_parms oparms;
 239         struct cifs_fid fid;
 240
 241         oparms.tcon = tcon;
 242         oparms.desired_access = FILE_READ_ATTRIBUTES;
 243         oparms.disposition = FILE_OPEN;
 244         oparms.create_options = 0;
 245         oparms.fid = &fid;
 246         oparms.reconnect = false;
 247
 248         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 249         if (rc)
 250                 return;
 251
 252 #ifdef CONFIG_CIFS_STATS2
 253         SMB3_request_interfaces(xid, tcon);
 254 #endif /* STATS2 */
 255
 256         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 257                         FS_ATTRIBUTE_INFORMATION);
 258         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 259                         FS_DEVICE_INFORMATION);
 260         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 261                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 262         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 263         return;
 264 }
 265
 266 static void
 267 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 268 {
 269         int rc;
 270         __le16 srch_path = 0; /* Null - open root of share */
 271         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 272         struct cifs_open_parms oparms;
 273         struct cifs_fid fid;
 274
 275         oparms.tcon = tcon;
 276         oparms.desired_access = FILE_READ_ATTRIBUTES;
 277         oparms.disposition = FILE_OPEN;
 278         oparms.create_options = 0;
 279         oparms.fid = &fid;
 280         oparms.reconnect = false;
 281
 282         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 283         if (rc)
 284                 return;
 285
 286         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 287                         FS_ATTRIBUTE_INFORMATION);
 288         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 289                         FS_DEVICE_INFORMATION);
 290         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 291         return;
 292 }
 293
 294 static int
 295 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 296                         struct cifs_sb_info *cifs_sb, const char *full_path)
 297 {
 298         int rc;
 299         __le16 *utf16_path;
 300         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 301         struct cifs_open_parms oparms;
 302         struct cifs_fid fid;
 303
 304         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 305         if (!utf16_path)
 306                 return -ENOMEM;
 307
 308         oparms.tcon = tcon;
 309         oparms.desired_access = FILE_READ_ATTRIBUTES;
 310         oparms.disposition = FILE_OPEN;
 311         oparms.create_options = 0;
 312         oparms.fid = &fid;
 313         oparms.reconnect = false;
 314
 315         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 316         if (rc) {
 317                 kfree(utf16_path);
 318                 return rc;
 319         }
 320
 321         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 322         kfree(utf16_path);
 323         return rc;
 324 }
 325
 326 static int
 327 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 328                   struct cifs_sb_info *cifs_sb, const char *full_path,
 329                   u64 *uniqueid, FILE_ALL_INFO *data)
 330 {
 331         *uniqueid = le64_to_cpu(data->IndexNumber);
 332         return 0;
 333 }
 334
 335 static int
 336 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 337                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 338 {
 339         int rc;
 340         struct smb2_file_all_info *smb2_data;
 341
 342         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 343                             GFP_KERNEL);
 344         if (smb2_data == NULL)
 345                 return -ENOMEM;
 346
 347         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 348                              smb2_data);
 349         if (!rc)
 350                 move_smb2_info_to_cifs(data, smb2_data);
 351         kfree(smb2_data);
 352         return rc;
 353 }
 354
 355 static bool
 356 smb2_can_echo(struct TCP_Server_Info *server)
 357 {
 358         return server->echoes;
 359 }
 360
 361 static void
 362 smb2_clear_stats(struct cifs_tcon *tcon)
 363 {
 364 #ifdef CONFIG_CIFS_STATS
 365         int i;
 366         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 367                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 368                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 369         }
 370 #endif
 371 }
 372
 373 static void
 374 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 375 {
 376         seq_puts(m, "\n\tShare Capabilities:");
 377         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 378                 seq_puts(m, " DFS,");
 379         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 380                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 381         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 382                 seq_puts(m, " SCALEOUT,");
 383         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 384                 seq_puts(m, " CLUSTER,");
 385         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 386                 seq_puts(m, " ASYMMETRIC,");
 387         if (tcon->capabilities == 0)
 388                 seq_puts(m, " None");
 389         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 390                 seq_puts(m, " Aligned,");
 391         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 392                 seq_puts(m, " Partition Aligned,");
 393         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 394                 seq_puts(m, " SSD,");
 395         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 396                 seq_puts(m, " TRIM-support,");
 397
 398         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 399         if (tcon->perf_sector_size)
 400                 seq_printf(m, "\tOptimal sector size: 0x%x",
 401                            tcon->perf_sector_size);
 402 }
 403
 404 static void
 405 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 406 {
 407 #ifdef CONFIG_CIFS_STATS
 408         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 409         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 410         seq_printf(m, "\nNegotiates: %d sent %d failed",
 411                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 412                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 413         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 414                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 415                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 416         seq_printf(m, "\nLogoffs: %d sent %d failed",
 417                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 418                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 419         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 420                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 421                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 422         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 423                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 424                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 425         seq_printf(m, "\nCreates: %d sent %d failed",
 426                    atomic_read(&sent[SMB2_CREATE_HE]),
 427                    atomic_read(&failed[SMB2_CREATE_HE]));
 428         seq_printf(m, "\nCloses: %d sent %d failed",
 429                    atomic_read(&sent[SMB2_CLOSE_HE]),
 430                    atomic_read(&failed[SMB2_CLOSE_HE]));
 431         seq_printf(m, "\nFlushes: %d sent %d failed",
 432                    atomic_read(&sent[SMB2_FLUSH_HE]),
 433                    atomic_read(&failed[SMB2_FLUSH_HE]));
 434         seq_printf(m, "\nReads: %d sent %d failed",
 435                    atomic_read(&sent[SMB2_READ_HE]),
 436                    atomic_read(&failed[SMB2_READ_HE]));
 437         seq_printf(m, "\nWrites: %d sent %d failed",
 438                    atomic_read(&sent[SMB2_WRITE_HE]),
 439                    atomic_read(&failed[SMB2_WRITE_HE]));
 440         seq_printf(m, "\nLocks: %d sent %d failed",
 441                    atomic_read(&sent[SMB2_LOCK_HE]),
 442                    atomic_read(&failed[SMB2_LOCK_HE]));
 443         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 444                    atomic_read(&sent[SMB2_IOCTL_HE]),
 445                    atomic_read(&failed[SMB2_IOCTL_HE]));
 446         seq_printf(m, "\nCancels: %d sent %d failed",
 447                    atomic_read(&sent[SMB2_CANCEL_HE]),
 448                    atomic_read(&failed[SMB2_CANCEL_HE]));
 449         seq_printf(m, "\nEchos: %d sent %d failed",
 450                    atomic_read(&sent[SMB2_ECHO_HE]),
 451                    atomic_read(&failed[SMB2_ECHO_HE]));
 452         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 453                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 454                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 455         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 456                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 457                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 458         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 459                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 460                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 461         seq_printf(m, "\nSetInfos: %d sent %d failed",
 462                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 463                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 464         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 465                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 466                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 467 #endif
 468 }
 469
 470 static void
 471 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 472 {
 473         struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
 474         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 475
 476         cfile->fid.persistent_fid = fid->persistent_fid;
 477         cfile->fid.volatile_fid = fid->volatile_fid;
 478         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 479                                       &fid->purge_cache);
 480         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 481 }
 482
 483 static void
 484 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 485                 struct cifs_fid *fid)
 486 {
 487         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 488 }
 489
 490 static int
 491 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 492                      u64 persistent_fid, u64 volatile_fid,
 493                      struct copychunk_ioctl *pcchunk)
 494 {
 495         int rc;
 496         unsigned int ret_data_len;
 497         struct resume_key_req *res_key;
 498
 499         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 500                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 501                         NULL, 0 /* no input */,
 502                         (char **)&res_key, &ret_data_len);
 503
 504         if (rc) {
 505                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 506                 goto req_res_key_exit;
 507         }
 508         if (ret_data_len < sizeof(struct resume_key_req)) {
 509                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 510                 rc = -EINVAL;
 511                 goto req_res_key_exit;
 512         }
 513         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 514
 515 req_res_key_exit:
 516         kfree(res_key);
 517         return rc;
 518 }
 519
 520 static int
 521 smb2_clone_range(const unsigned int xid,
 522                         struct cifsFileInfo *srcfile,
 523                         struct cifsFileInfo *trgtfile, u64 src_off,
 524                         u64 len, u64 dest_off)
 525 {
 526         int rc;
 527         unsigned int ret_data_len;
 528         struct copychunk_ioctl *pcchunk;
 529         struct copychunk_ioctl_rsp *retbuf = NULL;
 530         struct cifs_tcon *tcon;
 531         int chunks_copied = 0;
 532         bool chunk_sizes_updated = false;
 533
 534         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 535
 536         if (pcchunk == NULL)
 537                 return -ENOMEM;
 538
 539         cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
 540         /* Request a key from the server to identify the source of the copy */
 541         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 542                                 srcfile->fid.persistent_fid,
 543                                 srcfile->fid.volatile_fid, pcchunk);
 544
 545         /* Note: request_res_key sets res_key null only if rc !=0 */
 546         if (rc)
 547                 goto cchunk_out;
 548
 549         /* For now array only one chunk long, will make more flexible later */
 550         pcchunk->ChunkCount = __constant_cpu_to_le32(1);
 551         pcchunk->Reserved = 0;
 552         pcchunk->Reserved2 = 0;
 553
 554         tcon = tlink_tcon(trgtfile->tlink);
 555
 556         while (len > 0) {
 557                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 558                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 559                 pcchunk->Length =
 560                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 561
 562                 /* Request server copy to target from src identified by key */
 563                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 564                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 565                         true /* is_fsctl */, (char *)pcchunk,
 566                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 567                         &ret_data_len);
 568                 if (rc == 0) {
 569                         if (ret_data_len !=
 570                                         sizeof(struct copychunk_ioctl_rsp)) {
 571                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 572                                 rc = -EIO;
 573                                 goto cchunk_out;
 574                         }
 575                         if (retbuf->TotalBytesWritten == 0) {
 576                                 cifs_dbg(FYI, "no bytes copied\n");
 577                                 rc = -EIO;
 578                                 goto cchunk_out;
 579                         }
 580                         /*
 581                          * Check if server claimed to write more than we asked
 582                          */
 583                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 584                             le32_to_cpu(pcchunk->Length)) {
 585                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 586                                 rc = -EIO;
 587                                 goto cchunk_out;
 588                         }
 589                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 590                                 cifs_dbg(VFS, "invalid num chunks written\n");
 591                                 rc = -EIO;
 592                                 goto cchunk_out;
 593                         }
 594                         chunks_copied++;
 595
 596                         src_off += le32_to_cpu(retbuf->TotalBytesWritten);
 597                         dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
 598                         len -= le32_to_cpu(retbuf->TotalBytesWritten);
 599
 600                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
 601                                 le32_to_cpu(retbuf->ChunksWritten),
 602                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 603                                 le32_to_cpu(retbuf->TotalBytesWritten));
 604                 } else if (rc == -EINVAL) {
 605                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 606                                 goto cchunk_out;
 607
 608                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 609                                 le32_to_cpu(retbuf->ChunksWritten),
 610                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 611                                 le32_to_cpu(retbuf->TotalBytesWritten));
 612
 613                         /*
 614                          * Check if this is the first request using these sizes,
 615                          * (ie check if copy succeed once with original sizes
 616                          * and check if the server gave us different sizes after
 617                          * we already updated max sizes on previous request).
 618                          * if not then why is the server returning an error now
 619                          */
 620                         if ((chunks_copied != 0) || chunk_sizes_updated)
 621                                 goto cchunk_out;
 622
 623                         /* Check that server is not asking us to grow size */
 624                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 625                                         tcon->max_bytes_chunk)
 626                                 tcon->max_bytes_chunk =
 627                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 628                         else
 629                                 goto cchunk_out; /* server gave us bogus size */
 630
 631                         /* No need to change MaxChunks since already set to 1 */
 632                         chunk_sizes_updated = true;
 633                 }
 634         }
 635
 636 cchunk_out:
 637         kfree(pcchunk);
 638         return rc;
 639 }
 640
 641 static int
 642 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 643                 struct cifs_fid *fid)
 644 {
 645         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 646 }
 647
 648 static unsigned int
 649 smb2_read_data_offset(char *buf)
 650 {
 651         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 652         return rsp->DataOffset;
 653 }
 654
 655 static unsigned int
 656 smb2_read_data_length(char *buf)
 657 {
 658         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 659         return le32_to_cpu(rsp->DataLength);
 660 }
 661
 662
 663 static int
 664 smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
 665                struct cifs_io_parms *parms, unsigned int *bytes_read,
 666                char **buf, int *buf_type)
 667 {
 668         parms->persistent_fid = cfile->fid.persistent_fid;
 669         parms->volatile_fid = cfile->fid.volatile_fid;
 670         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 671 }
 672
 673 static int
 674 smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
 675                 struct cifs_io_parms *parms, unsigned int *written,
 676                 struct kvec *iov, unsigned long nr_segs)
 677 {
 678
 679         parms->persistent_fid = cfile->fid.persistent_fid;
 680         parms->volatile_fid = cfile->fid.volatile_fid;
 681         return SMB2_write(xid, parms, written, iov, nr_segs);
 682 }
 683
 684 static int
 685 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 686                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 687 {
 688         __le64 eof = cpu_to_le64(size);
 689         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 690                             cfile->fid.volatile_fid, cfile->pid, &eof);
 691 }
 692
 693 static int
 694 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 695                    struct cifsFileInfo *cfile)
 696 {
 697         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 698                             cfile->fid.volatile_fid);
 699 }
 700
 701 static int
 702 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 703                      const char *path, struct cifs_sb_info *cifs_sb,
 704                      struct cifs_fid *fid, __u16 search_flags,
 705                      struct cifs_search_info *srch_inf)
 706 {
 707         __le16 *utf16_path;
 708         int rc;
 709         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 710         struct cifs_open_parms oparms;
 711
 712         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 713         if (!utf16_path)
 714                 return -ENOMEM;
 715
 716         oparms.tcon = tcon;
 717         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 718         oparms.disposition = FILE_OPEN;
 719         oparms.create_options = 0;
 720         oparms.fid = fid;
 721         oparms.reconnect = false;
 722
 723         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 724         kfree(utf16_path);
 725         if (rc) {
 726                 cifs_dbg(VFS, "open dir failed\n");
 727                 return rc;
 728         }
 729
 730         srch_inf->entries_in_buffer = 0;
 731         srch_inf->index_of_last_entry = 0;
 732
 733         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 734                                   fid->volatile_fid, 0, srch_inf);
 735         if (rc) {
 736                 cifs_dbg(VFS, "query directory failed\n");
 737                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 738         }
 739         return rc;
 740 }
 741
 742 static int
 743 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 744                     struct cifs_fid *fid, __u16 search_flags,
 745                     struct cifs_search_info *srch_inf)
 746 {
 747         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 748                                     fid->volatile_fid, 0, srch_inf);
 749 }
 750
 751 static int
 752 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 753                struct cifs_fid *fid)
 754 {
 755         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 756 }
 757
 758 /*
 759 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 760 * the number of credits and return true. Otherwise - return false.
 761 */
 762 static bool
 763 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 764 {
 765         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 766
 767         if (hdr->Status != STATUS_PENDING)
 768                 return false;
 769
 770         if (!length) {
 771                 spin_lock(&server->req_lock);
 772                 server->credits += le16_to_cpu(hdr->CreditRequest);
 773                 spin_unlock(&server->req_lock);
 774                 wake_up(&server->request_q);
 775         }
 776
 777         return true;
 778 }
 779
 780 static int
 781 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 782                      struct cifsInodeInfo *cinode)
 783 {
 784         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 785                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 786                                         smb2_get_lease_state(cinode));
 787
 788         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 789                                  fid->volatile_fid,
 790                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 791 }
 792
 793 static int
 794 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 795              struct kstatfs *buf)
 796 {
 797         int rc;
 798         __le16 srch_path = 0; /* Null - open root of share */
 799         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 800         struct cifs_open_parms oparms;
 801         struct cifs_fid fid;
 802
 803         oparms.tcon = tcon;
 804         oparms.desired_access = FILE_READ_ATTRIBUTES;
 805         oparms.disposition = FILE_OPEN;
 806         oparms.create_options = 0;
 807         oparms.fid = &fid;
 808         oparms.reconnect = false;
 809
 810         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 811         if (rc)
 812                 return rc;
 813         buf->f_type = SMB2_MAGIC_NUMBER;
 814         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 815                            buf);
 816         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 817         return rc;
 818 }
 819
 820 static bool
 821 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
 822 {
 823         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
 824                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
 825 }
 826
 827 static int
 828 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
 829                __u64 length, __u32 type, int lock, int unlock, bool wait)
 830 {
 831         if (unlock && !lock)
 832                 type = SMB2_LOCKFLAG_UNLOCK;
 833         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
 834                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
 835                          current->tgid, length, offset, type, wait);
 836 }
 837
 838 static void
 839 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
 840 {
 841         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
 842 }
 843
 844 static void
 845 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
 846 {
 847         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
 848 }
 849
 850 static void
 851 smb2_new_lease_key(struct cifs_fid *fid)
 852 {
 853         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
 854 }
 855
 856 static int
 857 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
 858                    const char *full_path, char **target_path,
 859                    struct cifs_sb_info *cifs_sb)
 860 {
 861         int rc;
 862         __le16 *utf16_path;
 863         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 864         struct cifs_open_parms oparms;
 865         struct cifs_fid fid;
 866         struct smb2_err_rsp *err_buf = NULL;
 867         struct smb2_symlink_err_rsp *symlink;
 868         unsigned int sub_len, sub_offset;
 869
 870         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
 871
 872         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 873         if (!utf16_path)
 874                 return -ENOMEM;
 875
 876         oparms.tcon = tcon;
 877         oparms.desired_access = FILE_READ_ATTRIBUTES;
 878         oparms.disposition = FILE_OPEN;
 879         oparms.create_options = 0;
 880         oparms.fid = &fid;
 881         oparms.reconnect = false;
 882
 883         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
 884
 885         if (!rc || !err_buf) {
 886                 kfree(utf16_path);
 887                 return -ENOENT;
 888         }
 889         /* open must fail on symlink - reset rc */
 890         rc = 0;
 891         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
 892         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
 893         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
 894         *target_path = cifs_strndup_from_utf16(
 895                                 (char *)symlink->PathBuffer + sub_offset,
 896                                 sub_len, true, cifs_sb->local_nls);
 897         if (!(*target_path)) {
 898                 kfree(utf16_path);
 899                 return -ENOMEM;
 900         }
 901         convert_delimiter(*target_path, '/');
 902         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
 903         kfree(utf16_path);
 904         return rc;
 905 }
 906
 907 static void
 908 smb2_downgrade_oplock(struct TCP_Server_Info *server,
 909                         struct cifsInodeInfo *cinode, bool set_level2)
 910 {
 911         if (set_level2)
 912                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
 913                                                 0, NULL);
 914         else
 915                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
 916 }
 917
 918 static void
 919 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 920                       unsigned int epoch, bool *purge_cache)
 921 {
 922         oplock &= 0xFF;
 923         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
 924                 return;
 925         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
 926                 cinode->oplock = CIFS_CACHE_RHW_FLG;
 927                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
 928                          &cinode->vfs_inode);
 929         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
 930                 cinode->oplock = CIFS_CACHE_RW_FLG;
 931                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
 932                          &cinode->vfs_inode);
 933         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
 934                 cinode->oplock = CIFS_CACHE_READ_FLG;
 935                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
 936                          &cinode->vfs_inode);
 937         } else
 938                 cinode->oplock = 0;
 939 }
 940
 941 static void
 942 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 943                        unsigned int epoch, bool *purge_cache)
 944 {
 945         char message[5] = {0};
 946
 947         oplock &= 0xFF;
 948         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
 949                 return;
 950
 951         cinode->oplock = 0;
 952         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
 953                 cinode->oplock |= CIFS_CACHE_READ_FLG;
 954                 strcat(message, "R");
 955         }
 956         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
 957                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
 958                 strcat(message, "H");
 959         }
 960         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
 961                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
 962                 strcat(message, "W");
 963         }
 964         if (!cinode->oplock)
 965                 strcat(message, "None");
 966         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
 967                  &cinode->vfs_inode);
 968 }
 969
 970 static void
 971 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 972                       unsigned int epoch, bool *purge_cache)
 973 {
 974         unsigned int old_oplock = cinode->oplock;
 975
 976         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
 977
 978         if (purge_cache) {
 979                 *purge_cache = false;
 980                 if (old_oplock == CIFS_CACHE_READ_FLG) {
 981                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
 982                             (epoch - cinode->epoch > 0))
 983                                 *purge_cache = true;
 984                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
 985                                  (epoch - cinode->epoch > 1))
 986                                 *purge_cache = true;
 987                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
 988                                  (epoch - cinode->epoch > 1))
 989                                 *purge_cache = true;
 990                         else if (cinode->oplock == 0 &&
 991                                  (epoch - cinode->epoch > 0))
 992                                 *purge_cache = true;
 993                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
 994                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
 995                             (epoch - cinode->epoch > 0))
 996                                 *purge_cache = true;
 997                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
 998                                  (epoch - cinode->epoch > 1))
 999                                 *purge_cache = true;
1000                 }
1001                 cinode->epoch = epoch;
1002         }
1003 }
1004
1005 static bool
1006 smb2_is_read_op(__u32 oplock)
1007 {
1008         return oplock == SMB2_OPLOCK_LEVEL_II;
1009 }
1010
1011 static bool
1012 smb21_is_read_op(__u32 oplock)
1013 {
1014         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1015                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1016 }
1017
1018 static __le32
1019 map_oplock_to_lease(u8 oplock)
1020 {
1021         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1022                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1023         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1024                 return SMB2_LEASE_READ_CACHING;
1025         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1026                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1027                        SMB2_LEASE_WRITE_CACHING;
1028         return 0;
1029 }
1030
1031 static char *
1032 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1033 {
1034         struct create_lease *buf;
1035
1036         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1037         if (!buf)
1038                 return NULL;
1039
1040         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1041         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1042         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1043
1044         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1045                                         (struct create_lease, lcontext));
1046         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1047         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1048                                 (struct create_lease, Name));
1049         buf->ccontext.NameLength = cpu_to_le16(4);
1050         buf->Name[0] = 'R';
1051         buf->Name[1] = 'q';
1052         buf->Name[2] = 'L';
1053         buf->Name[3] = 's';
1054         return (char *)buf;
1055 }
1056
1057 static char *
1058 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1059 {
1060         struct create_lease_v2 *buf;
1061
1062         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1063         if (!buf)
1064                 return NULL;
1065
1066         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1067         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1068         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1069
1070         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1071                                         (struct create_lease_v2, lcontext));
1072         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1073         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1074                                 (struct create_lease_v2, Name));
1075         buf->ccontext.NameLength = cpu_to_le16(4);
1076         buf->Name[0] = 'R';
1077         buf->Name[1] = 'q';
1078         buf->Name[2] = 'L';
1079         buf->Name[3] = 's';
1080         return (char *)buf;
1081 }
1082
1083 static __u8
1084 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1085 {
1086         struct create_lease *lc = (struct create_lease *)buf;
1087
1088         *epoch = 0; /* not used */
1089         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1090                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1091         return le32_to_cpu(lc->lcontext.LeaseState);
1092 }
1093
1094 static __u8
1095 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1096 {
1097         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1098
1099         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1100         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1101                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1102         return le32_to_cpu(lc->lcontext.LeaseState);
1103 }
1104
1105 static bool
1106 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1107 {
1108         return !cfile->invalidHandle;
1109 }
1110
1111 struct smb_version_operations smb20_operations = {
1112         .compare_fids = smb2_compare_fids,
1113         .setup_request = smb2_setup_request,
1114         .setup_async_request = smb2_setup_async_request,
1115         .check_receive = smb2_check_receive,
1116         .add_credits = smb2_add_credits,
1117         .set_credits = smb2_set_credits,
1118         .get_credits_field = smb2_get_credits_field,
1119         .get_credits = smb2_get_credits,
1120         .get_next_mid = smb2_get_next_mid,
1121         .read_data_offset = smb2_read_data_offset,
1122         .read_data_length = smb2_read_data_length,
1123         .map_error = map_smb2_to_linux_error,
1124         .find_mid = smb2_find_mid,
1125         .check_message = smb2_check_message,
1126         .dump_detail = smb2_dump_detail,
1127         .clear_stats = smb2_clear_stats,
1128         .print_stats = smb2_print_stats,
1129         .is_oplock_break = smb2_is_valid_oplock_break,
1130         .downgrade_oplock = smb2_downgrade_oplock,
1131         .need_neg = smb2_need_neg,
1132         .negotiate = smb2_negotiate,
1133         .negotiate_wsize = smb2_negotiate_wsize,
1134         .negotiate_rsize = smb2_negotiate_rsize,
1135         .sess_setup = SMB2_sess_setup,
1136         .logoff = SMB2_logoff,
1137         .tree_connect = SMB2_tcon,
1138         .tree_disconnect = SMB2_tdis,
1139         .qfs_tcon = smb2_qfs_tcon,
1140         .is_path_accessible = smb2_is_path_accessible,
1141         .can_echo = smb2_can_echo,
1142         .echo = SMB2_echo,
1143         .query_path_info = smb2_query_path_info,
1144         .get_srv_inum = smb2_get_srv_inum,
1145         .query_file_info = smb2_query_file_info,
1146         .set_path_size = smb2_set_path_size,
1147         .set_file_size = smb2_set_file_size,
1148         .set_file_info = smb2_set_file_info,
1149         .set_compression = smb2_set_compression,
1150         .mkdir = smb2_mkdir,
1151         .mkdir_setinfo = smb2_mkdir_setinfo,
1152         .rmdir = smb2_rmdir,
1153         .unlink = smb2_unlink,
1154         .rename = smb2_rename_path,
1155         .create_hardlink = smb2_create_hardlink,
1156         .query_symlink = smb2_query_symlink,
1157         .open = smb2_open_file,
1158         .set_fid = smb2_set_fid,
1159         .close = smb2_close_file,
1160         .flush = smb2_flush_file,
1161         .async_readv = smb2_async_readv,
1162         .async_writev = smb2_async_writev,
1163         .sync_read = smb2_sync_read,
1164         .sync_write = smb2_sync_write,
1165         .query_dir_first = smb2_query_dir_first,
1166         .query_dir_next = smb2_query_dir_next,
1167         .close_dir = smb2_close_dir,
1168         .calc_smb_size = smb2_calc_size,
1169         .is_status_pending = smb2_is_status_pending,
1170         .oplock_response = smb2_oplock_response,
1171         .queryfs = smb2_queryfs,
1172         .mand_lock = smb2_mand_lock,
1173         .mand_unlock_range = smb2_unlock_range,
1174         .push_mand_locks = smb2_push_mandatory_locks,
1175         .get_lease_key = smb2_get_lease_key,
1176         .set_lease_key = smb2_set_lease_key,
1177         .new_lease_key = smb2_new_lease_key,
1178         .calc_signature = smb2_calc_signature,
1179         .is_read_op = smb2_is_read_op,
1180         .set_oplock_level = smb2_set_oplock_level,
1181         .create_lease_buf = smb2_create_lease_buf,
1182         .parse_lease_buf = smb2_parse_lease_buf,
1183         .clone_range = smb2_clone_range,
1184         .dir_needs_close = smb2_dir_needs_close,
1185 };
1186
1187 struct smb_version_operations smb21_operations = {
1188         .compare_fids = smb2_compare_fids,
1189         .setup_request = smb2_setup_request,
1190         .setup_async_request = smb2_setup_async_request,
1191         .check_receive = smb2_check_receive,
1192         .add_credits = smb2_add_credits,
1193         .set_credits = smb2_set_credits,
1194         .get_credits_field = smb2_get_credits_field,
1195         .get_credits = smb2_get_credits,
1196         .get_next_mid = smb2_get_next_mid,
1197         .read_data_offset = smb2_read_data_offset,
1198         .read_data_length = smb2_read_data_length,
1199         .map_error = map_smb2_to_linux_error,
1200         .find_mid = smb2_find_mid,
1201         .check_message = smb2_check_message,
1202         .dump_detail = smb2_dump_detail,
1203         .clear_stats = smb2_clear_stats,
1204         .print_stats = smb2_print_stats,
1205         .is_oplock_break = smb2_is_valid_oplock_break,
1206         .downgrade_oplock = smb2_downgrade_oplock,
1207         .need_neg = smb2_need_neg,
1208         .negotiate = smb2_negotiate,
1209         .negotiate_wsize = smb2_negotiate_wsize,
1210         .negotiate_rsize = smb2_negotiate_rsize,
1211         .sess_setup = SMB2_sess_setup,
1212         .logoff = SMB2_logoff,
1213         .tree_connect = SMB2_tcon,
1214         .tree_disconnect = SMB2_tdis,
1215         .qfs_tcon = smb2_qfs_tcon,
1216         .is_path_accessible = smb2_is_path_accessible,
1217         .can_echo = smb2_can_echo,
1218         .echo = SMB2_echo,
1219         .query_path_info = smb2_query_path_info,
1220         .get_srv_inum = smb2_get_srv_inum,
1221         .query_file_info = smb2_query_file_info,
1222         .set_path_size = smb2_set_path_size,
1223         .set_file_size = smb2_set_file_size,
1224         .set_file_info = smb2_set_file_info,
1225         .set_compression = smb2_set_compression,
1226         .mkdir = smb2_mkdir,
1227         .mkdir_setinfo = smb2_mkdir_setinfo,
1228         .rmdir = smb2_rmdir,
1229         .unlink = smb2_unlink,
1230         .rename = smb2_rename_path,
1231         .create_hardlink = smb2_create_hardlink,
1232         .query_symlink = smb2_query_symlink,
1233         .open = smb2_open_file,
1234         .set_fid = smb2_set_fid,
1235         .close = smb2_close_file,
1236         .flush = smb2_flush_file,
1237         .async_readv = smb2_async_readv,
1238         .async_writev = smb2_async_writev,
1239         .sync_read = smb2_sync_read,
1240         .sync_write = smb2_sync_write,
1241         .query_dir_first = smb2_query_dir_first,
1242         .query_dir_next = smb2_query_dir_next,
1243         .close_dir = smb2_close_dir,
1244         .calc_smb_size = smb2_calc_size,
1245         .is_status_pending = smb2_is_status_pending,
1246         .oplock_response = smb2_oplock_response,
1247         .queryfs = smb2_queryfs,
1248         .mand_lock = smb2_mand_lock,
1249         .mand_unlock_range = smb2_unlock_range,
1250         .push_mand_locks = smb2_push_mandatory_locks,
1251         .get_lease_key = smb2_get_lease_key,
1252         .set_lease_key = smb2_set_lease_key,
1253         .new_lease_key = smb2_new_lease_key,
1254         .calc_signature = smb2_calc_signature,
1255         .is_read_op = smb21_is_read_op,
1256         .set_oplock_level = smb21_set_oplock_level,
1257         .create_lease_buf = smb2_create_lease_buf,
1258         .parse_lease_buf = smb2_parse_lease_buf,
1259         .clone_range = smb2_clone_range,
1260         .dir_needs_close = smb2_dir_needs_close,
1261 };
1262
1263 struct smb_version_operations smb30_operations = {
1264         .compare_fids = smb2_compare_fids,
1265         .setup_request = smb2_setup_request,
1266         .setup_async_request = smb2_setup_async_request,
1267         .check_receive = smb2_check_receive,
1268         .add_credits = smb2_add_credits,
1269         .set_credits = smb2_set_credits,
1270         .get_credits_field = smb2_get_credits_field,
1271         .get_credits = smb2_get_credits,
1272         .get_next_mid = smb2_get_next_mid,
1273         .read_data_offset = smb2_read_data_offset,
1274         .read_data_length = smb2_read_data_length,
1275         .map_error = map_smb2_to_linux_error,
1276         .find_mid = smb2_find_mid,
1277         .check_message = smb2_check_message,
1278         .dump_detail = smb2_dump_detail,
1279         .clear_stats = smb2_clear_stats,
1280         .print_stats = smb2_print_stats,
1281         .dump_share_caps = smb2_dump_share_caps,
1282         .is_oplock_break = smb2_is_valid_oplock_break,
1283         .downgrade_oplock = smb2_downgrade_oplock,
1284         .need_neg = smb2_need_neg,
1285         .negotiate = smb2_negotiate,
1286         .negotiate_wsize = smb2_negotiate_wsize,
1287         .negotiate_rsize = smb2_negotiate_rsize,
1288         .sess_setup = SMB2_sess_setup,
1289         .logoff = SMB2_logoff,
1290         .tree_connect = SMB2_tcon,
1291         .tree_disconnect = SMB2_tdis,
1292         .qfs_tcon = smb3_qfs_tcon,
1293         .is_path_accessible = smb2_is_path_accessible,
1294         .can_echo = smb2_can_echo,
1295         .echo = SMB2_echo,
1296         .query_path_info = smb2_query_path_info,
1297         .get_srv_inum = smb2_get_srv_inum,
1298         .query_file_info = smb2_query_file_info,
1299         .set_path_size = smb2_set_path_size,
1300         .set_file_size = smb2_set_file_size,
1301         .set_file_info = smb2_set_file_info,
1302         .set_compression = smb2_set_compression,
1303         .mkdir = smb2_mkdir,
1304         .mkdir_setinfo = smb2_mkdir_setinfo,
1305         .rmdir = smb2_rmdir,
1306         .unlink = smb2_unlink,
1307         .rename = smb2_rename_path,
1308         .create_hardlink = smb2_create_hardlink,
1309         .query_symlink = smb2_query_symlink,
1310         .open = smb2_open_file,
1311         .set_fid = smb2_set_fid,
1312         .close = smb2_close_file,
1313         .flush = smb2_flush_file,
1314         .async_readv = smb2_async_readv,
1315         .async_writev = smb2_async_writev,
1316         .sync_read = smb2_sync_read,
1317         .sync_write = smb2_sync_write,
1318         .query_dir_first = smb2_query_dir_first,
1319         .query_dir_next = smb2_query_dir_next,
1320         .close_dir = smb2_close_dir,
1321         .calc_smb_size = smb2_calc_size,
1322         .is_status_pending = smb2_is_status_pending,
1323         .oplock_response = smb2_oplock_response,
1324         .queryfs = smb2_queryfs,
1325         .mand_lock = smb2_mand_lock,
1326         .mand_unlock_range = smb2_unlock_range,
1327         .push_mand_locks = smb2_push_mandatory_locks,
1328         .get_lease_key = smb2_get_lease_key,
1329         .set_lease_key = smb2_set_lease_key,
1330         .new_lease_key = smb2_new_lease_key,
1331         .generate_signingkey = generate_smb3signingkey,
1332         .calc_signature = smb3_calc_signature,
1333         .is_read_op = smb21_is_read_op,
1334         .set_oplock_level = smb3_set_oplock_level,
1335         .create_lease_buf = smb3_create_lease_buf,
1336         .parse_lease_buf = smb3_parse_lease_buf,
1337         .clone_range = smb2_clone_range,
1338         .validate_negotiate = smb3_validate_negotiate,
1339         .dir_needs_close = smb2_dir_needs_close,
1340 };
1341
1342 struct smb_version_values smb20_values = {
1343         .version_string = SMB20_VERSION_STRING,
1344         .protocol_id = SMB20_PROT_ID,
1345         .req_capabilities = 0, /* MBZ */
1346         .large_lock_type = 0,
1347         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1348         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1349         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1350         .header_size = sizeof(struct smb2_hdr),
1351         .max_header_size = MAX_SMB2_HDR_SIZE,
1352         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1353         .lock_cmd = SMB2_LOCK,
1354         .cap_unix = 0,
1355         .cap_nt_find = SMB2_NT_FIND,
1356         .cap_large_files = SMB2_LARGE_FILES,
1357         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1358         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1359         .create_lease_size = sizeof(struct create_lease),
1360 };
1361
1362 struct smb_version_values smb21_values = {
1363         .version_string = SMB21_VERSION_STRING,
1364         .protocol_id = SMB21_PROT_ID,
1365         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1366         .large_lock_type = 0,
1367         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1368         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1369         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1370         .header_size = sizeof(struct smb2_hdr),
1371         .max_header_size = MAX_SMB2_HDR_SIZE,
1372         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1373         .lock_cmd = SMB2_LOCK,
1374         .cap_unix = 0,
1375         .cap_nt_find = SMB2_NT_FIND,
1376         .cap_large_files = SMB2_LARGE_FILES,
1377         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1378         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1379         .create_lease_size = sizeof(struct create_lease),
1380 };
1381
1382 struct smb_version_values smb30_values = {
1383         .version_string = SMB30_VERSION_STRING,
1384         .protocol_id = SMB30_PROT_ID,
1385         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1386         .large_lock_type = 0,
1387         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1388         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1389         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1390         .header_size = sizeof(struct smb2_hdr),
1391         .max_header_size = MAX_SMB2_HDR_SIZE,
1392         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1393         .lock_cmd = SMB2_LOCK,
1394         .cap_unix = 0,
1395         .cap_nt_find = SMB2_NT_FIND,
1396         .cap_large_files = SMB2_LARGE_FILES,
1397         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1398         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1399         .create_lease_size = sizeof(struct create_lease_v2),
1400 };
1401
1402 struct smb_version_values smb302_values = {
1403         .version_string = SMB302_VERSION_STRING,
1404         .protocol_id = SMB302_PROT_ID,
1405         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1406         .large_lock_type = 0,
1407         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1408         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1409         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1410         .header_size = sizeof(struct smb2_hdr),
1411         .max_header_size = MAX_SMB2_HDR_SIZE,
1412         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1413         .lock_cmd = SMB2_LOCK,
1414         .cap_unix = 0,
1415         .cap_nt_find = SMB2_NT_FIND,
1416         .cap_large_files = SMB2_LARGE_FILES,
1417         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1418         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1419         .create_lease_size = sizeof(struct create_lease_v2),
1420 };