source3/include/vfs.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    VFS structures and parameters
   4    Copyright (C) Jeremy Allison                         1999-2005
   5    Copyright (C) Tim Potter                             1999
   6    Copyright (C) Alexander Bokovoy                      2002-2005
   7    Copyright (C) Stefan (metze) Metzmacher              2003
   8    Copyright (C) Volker Lendecke                        2009
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22
  23    This work was sponsored by Optifacio Software Services, Inc.
  24 */
  25
  26 #ifndef _VFS_H
  27 #define _VFS_H
  28
  29 /* Avoid conflict with an AIX include file */
  30
  31 #ifdef vfs_ops
  32 #undef vfs_ops
  33 #endif
  34
  35 /*
  36  * As we're now (thanks Andrew ! :-) using file_structs and connection
  37  * structs in the vfs - then anyone writing a vfs must include includes.h...
  38  */
  39
  40 /*
  41  * This next constant specifies the version number of the VFS interface
  42  * this smbd will load. Increment this if *ANY* changes are made to the
  43  * vfs_ops below. JRA.
  44  *
  45  * If you change anything here, please also update modules/vfs_full_audit.c.
  46  * VL.
  47  */
  48
  49 /* Changed to version 2 for CIFS UNIX extensions (mknod and link added). JRA. */
  50 /* Changed to version 3 for POSIX acl extensions. JRA. */
  51 /* Changed to version 4 for cascaded VFS interface. Alexander Bokovoy. */
  52 /* Changed to version 5 for sendfile addition. JRA. */
  53 /* Changed to version 6 for the new module system, fixed cascading and quota functions. --metze */
  54 /* Changed to version 7 to include the get_nt_acl info parameter. JRA. */
  55 /* Changed to version 8 includes EA calls. JRA. */
  56 /* Changed to version 9 to include the get_shadow_data call. --metze */
  57 /* Changed to version 10 to include pread/pwrite calls. */
  58 /* Changed to version 11 to include seekdir/telldir/rewinddir calls. JRA */
  59 /* Changed to version 12 to add mask and attributes to opendir(). JRA
  60    Also include aio calls. JRA. */
  61 /* Changed to version 13 as the internal structure of files_struct has changed. JRA */
  62 /* Changed to version 14 as we had to change DIR to SMB_STRUCT_DIR. JRA */
  63 /* Changed to version 15 as we added the statvfs call. JRA */
  64 /* Changed to version 16 as we added the getlock call. JRA */
  65 /* Changed to version 17 as we removed redundant connection_struct parameters. --jpeach */
  66 /* Changed to version 18 to add fsp parameter to the open call -- jpeach
  67    Also include kernel_flock call - jmcd */
  68 /* Changed to version 19, kernel change notify has been merged
  69    Also included linux setlease call - jmcd */
  70 /* Changed to version 20, use ntimes call instead of utime (greater
  71  * timestamp resolition. JRA. */
  72 /* Changed to version21 to add chflags operation -- jpeach */
  73 /* Changed to version22 to add lchown operation -- jra */
  74 /* Leave at 22 - not yet released. But change set_nt_acl to return an NTSTATUS. jra. */
  75 /* Leave at 22 - not yet released. Add file_id_create operation. --metze */
  76 /* Leave at 22 - not yet released. Change all BOOL parameters (int) to bool. jra. */
  77 /* Leave at 22 - not yet released. Added recvfile. */
  78 /* Leave at 22 - not yet released. Change get_nt_acl to return NTSTATUS - vl */
  79 /* Leave at 22 - not yet released. Change get_nt_acl to *not* take a
  80  * files_struct. - obnox.*/
  81 /* Leave at 22 - not yet released. Remove parameter fd from fget_nt_acl. - obnox */
  82 /* Leave at 22 - not yet released. Remove parameter fd from gset_nt_acl. - obnox */
  83 /* Leave at 22 - not yet released. Remove parameter fd from pread. - obnox */
  84 /* Leave at 22 - not yet released. Remove parameter fd from pwrite. - obnox */
  85 /* Leave at 22 - not yet released. Remove parameter fd from lseek. - obnox */
  86 /* Leave at 22 - not yet released. Remove parameter fd from fsync. - obnox */
  87 /* Leave at 22 - not yet released. Remove parameter fd from fstat. - obnox */
  88 /* Leave at 22 - not yet released. Remove parameter fd from fchmod. - obnox */
  89 /* Leave at 22 - not yet released. Remove parameter fd from fchown. - obnox */
  90 /* Leave at 22 - not yet released. Remove parameter fd from ftruncate. - obnox */
  91 /* Leave at 22 - not yet released. Remove parameter fd from lock. - obnox */
  92 /* Leave at 22 - not yet released. Remove parameter fd from kernel_flock. - obnox */
  93 /* Leave at 22 - not yet released. Remove parameter fd from linux_setlease. - obnox */
  94 /* Leave at 22 - not yet released. Remove parameter fd from getlock. - obnox */
  95 /* Leave at 22 - not yet released. Remove parameter fd from sys_acl_get_fd. - obnox */
  96 /* Leave at 22 - not yet released. Remove parameter fd from fchmod_acl. - obnox */
  97 /* Leave at 22 - not yet released. Remove parameter fd from sys_acl_set_fd. - obnox */
  98 /* Leave at 22 - not yet released. Remove parameter fd from fgetxattr. - obnox */
  99 /* Leave at 22 - not yet released. Remove parameter fd from flistxattr. - obnox */
 100 /* Leave at 22 - not yet released. Remove parameter fd from fremovexattr. - obnox */
 101 /* Leave at 22 - not yet released. Remove parameter fd from fsetxattr. - obnox */
 102 /* Leave at 22 - not yet released. Remove parameter fd from aio_cancel. - obnox */
 103 /* Leave at 22 - not yet released. Remove parameter fd from read. - obnox */
 104 /* Leave at 22 - not yet released. Remove parameter fd from write. - obnox */
 105 /* Leave at 22 - not yet released. Remove parameter fromfd from sendfile. - obnox */
 106 /* Leave at 22 - not yet released. Remove parameter fromfd from recvfile. - obnox */
 107 /* Leave at 22 - not yet released. Additional change: add operations for offline files -- ab */
 108 /* Leave at 22 - not yet released. Add the streaminfo call. -- jpeach, vl */
 109 /* Leave at 22 - not yet released. Remove parameter fd from close_fn. - obnox */
 110 /* Changed to version 23 - remove set_nt_acl call. This can only be done via an
 111    open handle. JRA. */
 112 /* Changed to version 24 - make security descriptor const in fset_nt_acl. JRA. */
 113 /* Changed to version 25 - Jelmer's change from SMB_BIG_UINT to uint64_t. */
 114 /* Leave at 25 - not yet released. Add create_file call. -- tprouty. */
 115 /* Leave at 25 - not yet released. Add create time to ntimes. -- tstecher. */
 116 /* Leave at 25 - not yet released. Add get_alloc_size call. -- tprouty. */
 117 /* Leave at 25 - not yet released. Add SMB_STRUCT_STAT to readdir. - sdann */
 118 /* Leave at 25 - not yet released. Add init_search_op call. - sdann */
 119 /* Leave at 25 - not yet released. Add locking calls. -- zkirsch. */
 120 /* Leave at 25 - not yet released. Add strict locking calls. -- drichards. */
 121 /* Changed to version 26 - Plumb struct smb_filename to SMB_VFS_CREATE_FILE,
 122                            SMB_VFS_OPEN, SMB_VFS_STAT, SMB_VFS_LSTAT,
 123                            SMB_VFS_RENAME, SMB_VFS_UNLINK, SMB_VFS_NTIMES.  */
 124 /* Changed to version 27 - not yet released. Added enum timestamp_set_resolution
 125  *                         return to fs_capabilities call. JRA. */
 126 /* Leave at 27 - not yet released. Add translate_name VFS call to convert
 127                  UNIX names to Windows supported names -- asrinivasan. */
 128 /* Changed to version 28 - Add private_flags uint32_t to CREATE call. */
 129 /* Leave at 28 - not yet released. Change realpath to assume NULL and return a
 130                  malloc'ed path. JRA. */
 131 /* Leave at 28 - not yet released. Move posix_fallocate into the VFS
 132                 where it belongs. JRA. */
 133 /* Leave at 28 - not yet released. Rename posix_fallocate to fallocate
 134                 to split out the two possible uses. JRA. */
 135 /* Leave at 28 - not yet released. Add fdopendir. JRA. */
 136 /* Leave at 28 - not yet released. Rename open function to open_fn. - gd */
 137 /* Leave at 28 - not yet released. Make getwd function always return malloced memory. JRA. */
 138 /* Bump to version 29 - Samba 3.6.0 will ship with interface version 28. */
 139 /* Leave at 29 - not yet releases. Add fsctl. Richard Sharpe */
 140 /* Leave at 29 - not yet released. add SMB_VFS_GET_DFS_REFERRAL() - metze */
 141 /* Leave at 29 - not yet released. Remove l{list,get,set,remove}xattr - abartlet */
 142 /* Leave at 29 - not yet released. move to plain off_t - abartlet */
 143 /* Leave at 29 - not yet released. Remove sys_acl functions other than set and get - abartlet */
 144 /* Leave at 29 - not yet released. Added backup_intent bool to files_struct - JRA */
 145 /* Leave at 29 - not yet released. Add durable handle functions - metze/obnox */
 146 /* Leave at 29 - not yet released. Added sys_acl_blob_get_file and sys_acl_blob_get_fd */
 147 /* Bump to version 30 - Samba 4.0.0 will ship with interface version 30 */
 148 /* Leave at 30 - not yet released. Added conn->cwd to save vfs_GetWd() calls. */
 149 /* Leave at 30 - not yet released. Changed sys_acl_blob_get_file interface to remove type */
 150 /* Bump to version 31 - Samba 4.1.0 will ship with interface version 31 */
 151 /* Leave at 31 - not yet released. Make struct vuid_cache_entry in
 152                 connection_struct a pointer. */
 153 /* Leave at 31 - not yet released. Add share_access to vuid_cache_entry. */
 154 /* Leave at 31 - not yet released. add SMB_VFS_COPY_CHUNK() */
 155 /* Leave at 31 - not yet released. Remove the unused
 156                 fsp->pending_break_messages array */
 157 /* Leave at 31 - not yet released. add SMB_VFS_[GET/SET]_COMPRESSION() */
 158
 159 /* Bump to version 32 - Samba 4.2 will ship with that. */
 160 /* Version 32 - Add "lease" to CREATE_FILE operation */
 161 /* Version 32 - Add "lease" to struct files_struct */
 162 /* Version 32 - Add SMB_VFS_READDIR_ATTR() */
 163 /* Version 32 - Add in and out create context blobs to create_file */
 164 /* Version 32 - Remove unnecessary SMB_VFS_DISK_FREE() small_query parameter */
 165 /* Bump to version 33 - Samba 4.3 will ship with that. */
 166 /* Version 33 - change fallocate mode flags param from enum->uint32_t */
 167 /* Version 33 - Add snapshot create/delete calls */
 168 /* Version 33 - Add OS X SMB2 AAPL copyfile extension flag to fsp */
 169 /* Version 33 - Remove notify_watch_fn */
 170 /* Bump to version 34 - Samba 4.4 will ship with that */
 171 /* Version 34 - Remove bool posix_open, add uint64_t posix_flags */
 172 /* Version 34 - Added bool posix_pathnames to struct smb_request */
 173 /* Bump to version 35 - Samba 4.5 will ship with that */
 174 /* Version 35 - Change get_nt_acl_fn from const char *, to
 175                 const struct smb_filename * */
 176 /* Version 35 - Change mkdir from const char *, to
 177                 const struct smb_filename * */
 178 /* Version 35 - Change rmdir from const char *, to
 179                 const struct smb_filename * */
 180 /* Version 35 - Change opendir from const char *, to
 181                 const struct smb_filename * */
 182 /* Version 35 - Wrap aio async funtions args in a struct vfs_aio_state */
 183 /* Version 35 - Change chmod from const char *, to
 184                 const struct smb_filename * */
 185 /* Version 35 - Change chmod_acl from const char *, to
 186                 const struct smb_filename * */
 187 /* Version 35 - Change chown from const char *, to
 188                 const struct smb_filename * */
 189 /* Version 35 - Change lchown from const char *, to
 190                 const struct smb_filename * */
 191 /* Version 35 - Change streaminfo from const char *, to
 192                 const struct smb_filename * */
 193 /* Version 35 - Add uint32_t flags to struct smb_filename */
 194 /* Version 35 - Add get/set/fget/fset dos attribute functions. */
 195 /* Version 35 - Add bool use_ofd_locks to struct files_struct */
 196
 197 #define SMB_VFS_INTERFACE_VERSION 35
 198
 199 /*
 200     All intercepted VFS operations must be declared as static functions inside module source
 201     in order to keep smbd namespace unpolluted. See source of audit, extd_audit, fake_perms and recycle
 202     example VFS modules for more details.
 203 */
 204
 205 /* VFS operations structure */
 206
 207 struct vfs_handle_struct;
 208 struct connection_struct;
 209 struct files_struct;
 210 struct security_descriptor;
 211 struct vfs_statvfs_struct;
 212 struct smb_request;
 213 struct ea_list;
 214 struct smb_file_time;
 215 struct blocking_lock_record;
 216 struct smb_filename;
 217 struct dfs_GetDFSReferral;
 218
 219 typedef union unid_t {
 220         uid_t uid;
 221         gid_t gid;
 222 } unid_t;
 223
 224 struct fd_handle {
 225         size_t ref_count;
 226         int fd;
 227         uint64_t position_information;
 228         off_t pos;
 229         uint32_t private_options;       /* NT Create options, but we only look at
 230                                  * NTCREATEX_OPTIONS_PRIVATE_DENY_DOS and
 231                                  * NTCREATEX_OPTIONS_PRIVATE_DENY_FCB and
 232                                  * NTCREATEX_OPTIONS_PRIVATE_DELETE_ON_CLOSE
 233                                  * for print files *only*, where
 234                                  * DELETE_ON_CLOSE is not stored in the share
 235                                  * mode database.
 236                                  */
 237         unsigned long gen_id;
 238 };
 239
 240 struct fsp_lease {
 241         size_t ref_count;
 242         struct smbd_server_connection *sconn;
 243         struct tevent_timer *timeout;
 244         struct smb2_lease lease;
 245 };
 246
 247 typedef struct files_struct {
 248         struct files_struct *next, *prev;
 249         uint64_t fnum;
 250         struct smbXsrv_open *op;
 251         struct connection_struct *conn;
 252         struct fd_handle *fh;
 253         unsigned int num_smb_operations;
 254         struct file_id file_id;
 255         uint64_t initial_allocation_size; /* Faked up initial allocation on disk. */
 256         uint16_t file_pid;
 257         uint64_t vuid; /* SMB2 compat */
 258         struct write_cache *wcp;
 259         struct timeval open_time;
 260         uint32_t access_mask;           /* NTCreateX access bits (FILE_READ_DATA etc.) */
 261         uint32_t share_access;          /* NTCreateX share constants (FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE). */
 262
 263         bool kernel_share_modes_taken;
 264
 265         bool update_write_time_triggered;
 266         struct tevent_timer *update_write_time_event;
 267         bool update_write_time_on_close;
 268         struct timespec close_write_time;
 269         bool write_time_forced;
 270
 271         int oplock_type;
 272         struct fsp_lease *lease;
 273         int sent_oplock_break;
 274         struct tevent_timer *oplock_timeout;
 275         struct lock_struct last_lock_failure;
 276         int current_lock_count; /* Count the number of outstanding locks and pending locks. */
 277
 278         bool can_lock;
 279         bool can_read;
 280         bool can_write;
 281         bool modified;
 282         bool is_directory;
 283         bool aio_write_behind;
 284         bool initial_delete_on_close; /* Only set at NTCreateX if file was created. */
 285         bool delete_on_close;
 286         uint64_t posix_flags;
 287         bool is_sparse;
 288         bool backup_intent; /* Handle was successfully opened with backup intent
 289                                 and opener has privilege to do so. */
 290         bool aapl_copyfile_supported;
 291         bool use_ofd_locks; /* Are we using open file description locks ? */
 292         struct smb_filename *fsp_name;
 293         uint32_t name_hash;             /* Jenkins hash of full pathname. */
 294         uint64_t mid;                   /* Mid of the operation that created us. */
 295
 296         struct vfs_fsp_data *vfs_extension;
 297         struct fake_file_handle *fake_file_handle;
 298
 299         struct notify_change_buf *notify;
 300
 301         struct files_struct *base_fsp; /* placeholder for delete on close */
 302
 303         /*
 304          * Read-only cached brlock record, thrown away when the
 305          * brlock.tdb seqnum changes. This avoids fetching data from
 306          * the brlock.tdb on every read/write call.
 307          */
 308         int brlock_seqnum;
 309         struct byte_range_lock *brlock_rec;
 310
 311         struct dptr_struct *dptr;
 312
 313         /* if not NULL, means this is a print file */
 314         struct print_file_data *print_file;
 315
 316         unsigned num_aio_requests;
 317         struct tevent_req **aio_requests;
 318
 319         /*
 320          * If a close request comes in while we still have aio_requests
 321          * around, we need to hold back the close. When all aio_requests are
 322          * done, the aio completion routines need tevent_wait_done() on
 323          * this. A bit ugly, but before we have close_file() fully async
 324          * possibly the simplest approach. Thanks, Jeremy for the idea.
 325          */
 326         struct tevent_req *deferred_close;
 327 } files_struct;
 328
 329 #define FSP_POSIX_FLAGS_OPEN            0x01
 330 #define FSP_POSIX_FLAGS_RENAME          0x02
 331 #define FSP_POSIX_FLAGS_PATHNAMES       0x04
 332
 333 #define FSP_POSIX_FLAGS_ALL                     \
 334         (FSP_POSIX_FLAGS_OPEN |                 \
 335          FSP_POSIX_FLAGS_PATHNAMES |            \
 336          FSP_POSIX_FLAGS_RENAME)
 337
 338 struct vuid_cache_entry {
 339         struct auth_session_info *session_info;
 340         uint64_t vuid; /* SMB2 compat */
 341         bool read_only;
 342         uint32_t share_access;
 343 };
 344
 345 struct vuid_cache {
 346         unsigned int next_entry;
 347         struct vuid_cache_entry array[VUID_CACHE_SIZE];
 348 };
 349
 350 typedef struct {
 351         char *name;
 352         bool is_wild;
 353 } name_compare_entry;
 354
 355 struct dfree_cached_info {
 356         time_t last_dfree_time;
 357         uint64_t dfree_ret;
 358         uint64_t bsize;
 359         uint64_t dfree;
 360         uint64_t dsize;
 361 };
 362
 363 struct share_params {
 364         int service;
 365 };
 366
 367 typedef struct connection_struct {
 368         struct connection_struct *next, *prev;
 369         struct smbd_server_connection *sconn; /* can be NULL */
 370         struct smbXsrv_tcon *tcon; /* can be NULL */
 371         uint32_t cnum; /* an index passed over the wire */
 372         struct share_params *params;
 373         bool force_user;
 374         struct vuid_cache *vuid_cache;
 375         bool printer;
 376         bool ipc;
 377         bool read_only; /* Attributes for the current user of the share. */
 378         uint32_t share_access;
 379         /* Does this filesystem honor
 380            sub second timestamps on files
 381            and directories when setting time ? */
 382         enum timestamp_set_resolution ts_res;
 383         char *connectpath;
 384         char *origpath;
 385         char *cwd; /* Working directory. */
 386
 387         struct vfs_handle_struct *vfs_handles;          /* for the new plugins */
 388
 389         /*
 390          * This represents the user information on this connection. Depending
 391          * on the vuid using this tid, this might change per SMB request.
 392          */
 393         struct auth_session_info *session_info;
 394
 395         /*
 396          * If the "force group" parameter is set, this is the primary gid that
 397          * may be used in the users token, depending on the vuid using this tid.
 398          */
 399         gid_t force_group_gid;
 400
 401         uint64_t vuid; /* vuid of user who *opened* this connection, or UID_FIELD_INVALID */
 402
 403         time_t lastused;
 404         time_t lastused_count;
 405         int num_files_open;
 406         unsigned int num_smb_operations; /* Count of smb operations on this tree. */
 407         int encrypt_level;
 408         bool encrypted_tid;
 409
 410         /* Semantics requested by the client or forced by the server config. */
 411         bool case_sensitive;
 412         bool case_preserve;
 413         bool short_case_preserve;
 414
 415         /* Semantics provided by the underlying filesystem. */
 416         int fs_capabilities;
 417         /* Device number of the directory of the share mount.
 418            Used to ensure unique FileIndex returns. */
 419         SMB_DEV_T base_share_dev;
 420
 421         name_compare_entry *hide_list; /* Per-share list of files to return as hidden. */
 422         name_compare_entry *veto_list; /* Per-share list of files to veto (never show). */
 423         name_compare_entry *veto_oplock_list; /* Per-share list of files to refuse oplocks on. */
 424         name_compare_entry *aio_write_behind_list; /* Per-share list of files to use aio write behind on. */
 425         struct dfree_cached_info *dfree_info;
 426         struct trans_state *pending_trans;
 427
 428         struct rpc_pipe_client *spoolss_pipe;
 429
 430 } connection_struct;
 431
 432 struct smbd_smb2_request;
 433 struct privilege_paths;
 434
 435 struct smb_request {
 436         uint8_t cmd;
 437         uint16_t flags2;
 438         uint16_t smbpid;
 439         uint64_t mid; /* For compatibility with SMB2. */
 440         uint32_t seqnum;
 441         uint64_t vuid; /* For compatibility with SMB2. */
 442         uint32_t tid;
 443         uint8_t  wct;
 444         const uint16_t *vwv;
 445         uint16_t buflen;
 446         const uint8_t *buf;
 447         const uint8_t *inbuf;
 448
 449         /*
 450          * Async handling in the main smb processing loop is directed by
 451          * outbuf: reply_xxx routines indicate sync behaviour by putting their
 452          * reply into "outbuf". If they leave it as NULL, they take care of it
 453          * themselves, possibly later.
 454          *
 455          * If async handling is wanted, the reply_xxx routine must make sure
 456          * that it talloc_move()s the smb_req somewhere else.
 457          */
 458         uint8_t *outbuf;
 459
 460         size_t unread_bytes;
 461         bool encrypted;
 462         connection_struct *conn;
 463         struct smbd_server_connection *sconn;
 464         struct smbXsrv_connection *xconn;
 465         struct smb_perfcount_data pcd;
 466
 467         /*
 468          * Chained request handling
 469          */
 470         struct files_struct *chain_fsp;
 471
 472         /*
 473          * state information for async smb handling
 474          */
 475         void *async_priv;
 476
 477         /*
 478          * Back pointer to smb2 request.
 479          */
 480         struct smbd_smb2_request *smb2req;
 481
 482         /*
 483          * Pathnames used if request done
 484          * under privilege.
 485          */
 486         struct privilege_paths *priv_paths;
 487
 488         /*
 489          * Request list for chained requests, we're part of it.
 490          */
 491         struct smb_request **chain;
 492
 493         struct timeval request_time;
 494
 495         bool posix_pathnames;
 496 };
 497
 498 /*
 499  * Info about an alternate data stream
 500  */
 501
 502 struct stream_struct {
 503         off_t size;
 504         off_t alloc_size;
 505         char *name;
 506 };
 507
 508 /* time info */
 509 struct smb_file_time {
 510         struct timespec mtime;
 511         struct timespec atime;
 512         struct timespec ctime;
 513         struct timespec create_time;
 514 };
 515
 516 /*
 517  * smb_filename
 518  */
 519 struct smb_filename {
 520         char *base_name;
 521         char *stream_name;
 522         char *original_lcomp;
 523         uint32_t flags;
 524         SMB_STRUCT_STAT st;
 525 };
 526
 527 /*
 528  * smb_filename flags. Define in terms of the FSP_POSIX_FLAGS_XX
 529  * to keep the numeric values consistent.
 530  */
 531
 532 #define SMB_FILENAME_POSIX_PATH         FSP_POSIX_FLAGS_PATHNAMES
 533
 534 #define VFS_FIND(__fn__) while (handle->fns->__fn__##_fn==NULL) { \
 535                                 handle = handle->next; \
 536                          }
 537
 538 enum vfs_translate_direction {
 539         vfs_translate_to_unix = 0,
 540         vfs_translate_to_windows
 541 };
 542
 543 enum vfs_fallocate_flags {
 544         VFS_FALLOCATE_FL_KEEP_SIZE              = 0x0001,
 545         VFS_FALLOCATE_FL_PUNCH_HOLE             = 0x0002,
 546 };
 547
 548 struct vfs_aio_state {
 549         int error;
 550         uint64_t duration;
 551 };
 552
 553 /*
 554     Available VFS operations. These values must be in sync with vfs_ops struct
 555     (struct vfs_fn_pointers and struct vfs_handle_pointers inside of struct vfs_ops).
 556     In particular, if new operations are added to vfs_ops, appropriate constants
 557     should be added to vfs_op_type so that order of them kept same as in vfs_ops.
 558 */
 559 struct shadow_copy_data;
 560
 561 struct vfs_fn_pointers {
 562         /* Disk operations */
 563
 564         int (*connect_fn)(struct vfs_handle_struct *handle, const char *service, const char *user);
 565         void (*disconnect_fn)(struct vfs_handle_struct *handle);
 566         uint64_t (*disk_free_fn)(struct vfs_handle_struct *handle, const char *path, uint64_t *bsize,
 567                               uint64_t *dfree, uint64_t *dsize);
 568         int (*get_quota_fn)(struct vfs_handle_struct *handle, const char *path,
 569                             enum SMB_QUOTA_TYPE qtype, unid_t id,
 570                             SMB_DISK_QUOTA *qt);
 571         int (*set_quota_fn)(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt);
 572         int (*get_shadow_copy_data_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, struct shadow_copy_data *shadow_copy_data, bool labels);
 573         int (*statvfs_fn)(struct vfs_handle_struct *handle, const char *path, struct vfs_statvfs_struct *statbuf);
 574         uint32_t (*fs_capabilities_fn)(struct vfs_handle_struct *handle, enum timestamp_set_resolution *p_ts_res);
 575
 576         /*
 577          * Note: that "struct dfs_GetDFSReferral *r"
 578          * needs to be a valid TALLOC_CTX
 579          */
 580         NTSTATUS (*get_dfs_referrals_fn)(struct vfs_handle_struct *handle,
 581                                          struct dfs_GetDFSReferral *r);
 582
 583         /* Directory operations */
 584
 585         DIR *(*opendir_fn)(struct vfs_handle_struct *handle,
 586                                         const struct smb_filename *smb_fname,
 587                                         const char *mask,
 588                                         uint32_t attributes);
 589         DIR *(*fdopendir_fn)(struct vfs_handle_struct *handle, files_struct *fsp, const char *mask, uint32_t attributes);
 590         struct dirent *(*readdir_fn)(struct vfs_handle_struct *handle,
 591                                          DIR *dirp,
 592                                          SMB_STRUCT_STAT *sbuf);
 593         void (*seekdir_fn)(struct vfs_handle_struct *handle, DIR *dirp, long offset);
 594         long (*telldir_fn)(struct vfs_handle_struct *handle, DIR *dirp);
 595         void (*rewind_dir_fn)(struct vfs_handle_struct *handle, DIR *dirp);
 596         int (*mkdir_fn)(struct vfs_handle_struct *handle,
 597                         const struct smb_filename *smb_fname,
 598                         mode_t mode);
 599         int (*rmdir_fn)(struct vfs_handle_struct *handle,
 600                         const struct smb_filename *smb_fname);
 601         int (*closedir_fn)(struct vfs_handle_struct *handle, DIR *dir);
 602         void (*init_search_op_fn)(struct vfs_handle_struct *handle, DIR *dirp);
 603
 604         /* File operations */
 605
 606         int (*open_fn)(struct vfs_handle_struct *handle,
 607                        struct smb_filename *smb_fname, files_struct *fsp,
 608                        int flags, mode_t mode);
 609         NTSTATUS (*create_file_fn)(struct vfs_handle_struct *handle,
 610                                    struct smb_request *req,
 611                                    uint16_t root_dir_fid,
 612                                    struct smb_filename *smb_fname,
 613                                    uint32_t access_mask,
 614                                    uint32_t share_access,
 615                                    uint32_t create_disposition,
 616                                    uint32_t create_options,
 617                                    uint32_t file_attributes,
 618                                    uint32_t oplock_request,
 619                                    struct smb2_lease *lease,
 620                                    uint64_t allocation_size,
 621                                    uint32_t private_flags,
 622                                    struct security_descriptor *sd,
 623                                    struct ea_list *ea_list,
 624                                    files_struct **result,
 625                                    int *pinfo,
 626                                    const struct smb2_create_blobs *in_context_blobs,
 627                                    struct smb2_create_blobs *out_context_blobs);
 628         int (*close_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp);
 629         ssize_t (*read_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, void *data, size_t n);
 630         ssize_t (*pread_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, void *data, size_t n, off_t offset);
 631         struct tevent_req *(*pread_send_fn)(struct vfs_handle_struct *handle,
 632                                             TALLOC_CTX *mem_ctx,
 633                                             struct tevent_context *ev,
 634                                             struct files_struct *fsp,
 635                                             void *data,
 636                                             size_t n, off_t offset);
 637         ssize_t (*pread_recv_fn)(struct tevent_req *req, struct vfs_aio_state *state);
 638         ssize_t (*write_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const void *data, size_t n);
 639         ssize_t (*pwrite_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const void *data, size_t n, off_t offset);
 640         struct tevent_req *(*pwrite_send_fn)(struct vfs_handle_struct *handle,
 641                                              TALLOC_CTX *mem_ctx,
 642                                              struct tevent_context *ev,
 643                                              struct files_struct *fsp,
 644                                              const void *data,
 645                                              size_t n, off_t offset);
 646         ssize_t (*pwrite_recv_fn)(struct tevent_req *req, struct vfs_aio_state *state);
 647         off_t (*lseek_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, off_t offset, int whence);
 648         ssize_t (*sendfile_fn)(struct vfs_handle_struct *handle, int tofd, files_struct *fromfsp, const DATA_BLOB *header, off_t offset, size_t count);
 649         ssize_t (*recvfile_fn)(struct vfs_handle_struct *handle, int fromfd, files_struct *tofsp, off_t offset, size_t count);
 650         int (*rename_fn)(struct vfs_handle_struct *handle,
 651                          const struct smb_filename *smb_fname_src,
 652                          const struct smb_filename *smb_fname_dst);
 653         int (*fsync_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp);
 654         struct tevent_req *(*fsync_send_fn)(struct vfs_handle_struct *handle,
 655                                             TALLOC_CTX *mem_ctx,
 656                                             struct tevent_context *ev,
 657                                             struct files_struct *fsp);
 658         int (*fsync_recv_fn)(struct tevent_req *req, struct vfs_aio_state *state);
 659         int (*stat_fn)(struct vfs_handle_struct *handle, struct smb_filename *smb_fname);
 660         int (*fstat_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_STAT *sbuf);
 661         int (*lstat_fn)(struct vfs_handle_struct *handle, struct smb_filename *smb_filename);
 662         uint64_t (*get_alloc_size_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const SMB_STRUCT_STAT *sbuf);
 663         int (*unlink_fn)(struct vfs_handle_struct *handle,
 664                          const struct smb_filename *smb_fname);
 665         int (*chmod_fn)(struct vfs_handle_struct *handle,
 666                         const struct smb_filename *smb_fname,
 667                         mode_t mode);
 668         int (*fchmod_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, mode_t mode);
 669         int (*chown_fn)(struct vfs_handle_struct *handle,
 670                         const struct smb_filename *smb_fname,
 671                         uid_t uid,
 672                         gid_t gid);
 673         int (*fchown_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, uid_t uid, gid_t gid);
 674         int (*lchown_fn)(struct vfs_handle_struct *handle,
 675                         const struct smb_filename *smb_fname,
 676                         uid_t uid,
 677                         gid_t gid);
 678         int (*chdir_fn)(struct vfs_handle_struct *handle, const char *path);
 679         char *(*getwd_fn)(struct vfs_handle_struct *handle);
 680         int (*ntimes_fn)(struct vfs_handle_struct *handle,
 681                          const struct smb_filename *smb_fname,
 682                          struct smb_file_time *ft);
 683         int (*ftruncate_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, off_t offset);
 684         int (*fallocate_fn)(struct vfs_handle_struct *handle,
 685                             struct files_struct *fsp,
 686                             uint32_t mode,
 687                             off_t offset,
 688                             off_t len);
 689         bool (*lock_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, int op, off_t offset, off_t count, int type);
 690         int (*kernel_flock_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp,
 691                                uint32_t share_mode, uint32_t access_mask);
 692         int (*linux_setlease_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, int leasetype);
 693         bool (*getlock_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, off_t *poffset, off_t *pcount, int *ptype, pid_t *ppid);
 694         int (*symlink_fn)(struct vfs_handle_struct *handle, const char *oldpath, const char *newpath);
 695         int (*readlink_fn)(struct vfs_handle_struct *handle, const char *path, char *buf, size_t bufsiz);
 696         int (*link_fn)(struct vfs_handle_struct *handle, const char *oldpath, const char *newpath);
 697         int (*mknod_fn)(struct vfs_handle_struct *handle, const char *path, mode_t mode, SMB_DEV_T dev);
 698         char *(*realpath_fn)(struct vfs_handle_struct *handle, const char *path);
 699         int (*chflags_fn)(struct vfs_handle_struct *handle, const char *path, unsigned int flags);
 700         struct file_id (*file_id_create_fn)(struct vfs_handle_struct *handle,
 701                                             const SMB_STRUCT_STAT *sbuf);
 702         struct tevent_req *(*copy_chunk_send_fn)(struct vfs_handle_struct *handle,
 703                                                  TALLOC_CTX *mem_ctx,
 704                                                  struct tevent_context *ev,
 705                                                  struct files_struct *src_fsp,
 706                                                  off_t src_off,
 707                                                  struct files_struct *dest_fsp,
 708                                                  off_t dest_off,
 709                                                  off_t num);
 710         NTSTATUS (*copy_chunk_recv_fn)(struct vfs_handle_struct *handle,
 711                                        struct tevent_req *req,
 712                                        off_t *copied);
 713         NTSTATUS (*get_compression_fn)(struct vfs_handle_struct *handle,
 714                                        TALLOC_CTX *mem_ctx,
 715                                        struct files_struct *fsp,
 716                                        struct smb_filename *smb_fname,
 717                                        uint16_t *_compression_fmt);
 718         NTSTATUS (*set_compression_fn)(struct vfs_handle_struct *handle,
 719                                        TALLOC_CTX *mem_ctx,
 720                                        struct files_struct *fsp,
 721                                        uint16_t compression_fmt);
 722         NTSTATUS (*snap_check_path_fn)(struct vfs_handle_struct *handle,
 723                                        TALLOC_CTX *mem_ctx,
 724                                        const char *service_path,
 725                                        char **base_volume);
 726         NTSTATUS (*snap_create_fn)(struct vfs_handle_struct *handle,
 727                                    TALLOC_CTX *mem_ctx,
 728                                    const char *base_volume,
 729                                    time_t *tstamp,
 730                                    bool rw,
 731                                    char **base_path,
 732                                    char **snap_path);
 733         NTSTATUS (*snap_delete_fn)(struct vfs_handle_struct *handle,
 734                                    TALLOC_CTX *mem_ctx,
 735                                    char *base_path,
 736                                    char *snap_path);
 737
 738         NTSTATUS (*streaminfo_fn)(struct vfs_handle_struct *handle,
 739                                   struct files_struct *fsp,
 740                                   const struct smb_filename *smb_fname,
 741                                   TALLOC_CTX *mem_ctx,
 742                                   unsigned int *num_streams,
 743                                   struct stream_struct **streams);
 744
 745         int (*get_real_filename_fn)(struct vfs_handle_struct *handle,
 746                                     const char *path,
 747                                     const char *name,
 748                                     TALLOC_CTX *mem_ctx,
 749                                     char **found_name);
 750
 751         const char *(*connectpath_fn)(struct vfs_handle_struct *handle,
 752                                       const char *filename);
 753
 754         NTSTATUS (*brl_lock_windows_fn)(struct vfs_handle_struct *handle,
 755                                         struct byte_range_lock *br_lck,
 756                                         struct lock_struct *plock,
 757                                         bool blocking_lock);
 758
 759         bool (*brl_unlock_windows_fn)(struct vfs_handle_struct *handle,
 760                                       struct messaging_context *msg_ctx,
 761                                       struct byte_range_lock *br_lck,
 762                                       const struct lock_struct *plock);
 763
 764         bool (*brl_cancel_windows_fn)(struct vfs_handle_struct *handle,
 765                                       struct byte_range_lock *br_lck,
 766                                       struct lock_struct *plock);
 767
 768         bool (*strict_lock_fn)(struct vfs_handle_struct *handle,
 769                                struct files_struct *fsp,
 770                                struct lock_struct *plock);
 771
 772         void (*strict_unlock_fn)(struct vfs_handle_struct *handle,
 773                                  struct files_struct *fsp,
 774                                  struct lock_struct *plock);
 775
 776         NTSTATUS (*translate_name_fn)(struct vfs_handle_struct *handle,
 777                                       const char *name,
 778                                       enum vfs_translate_direction direction,
 779                                       TALLOC_CTX *mem_ctx,
 780                                       char **mapped_name);
 781
 782         NTSTATUS (*fsctl_fn)(struct vfs_handle_struct *handle,
 783                              struct files_struct *fsp,
 784                              TALLOC_CTX *ctx,
 785                              uint32_t function,
 786                              uint16_t req_flags,
 787                              const uint8_t *_in_data,
 788                              uint32_t in_len,
 789                              uint8_t **_out_data,
 790                              uint32_t max_out_len,
 791                              uint32_t *out_len);
 792
 793         NTSTATUS (*get_dos_attributes_fn)(struct vfs_handle_struct *handle,
 794                                           struct smb_filename *smb_fname,
 795                                           uint32_t *dosmode);
 796
 797         NTSTATUS (*fget_dos_attributes_fn)(struct vfs_handle_struct *handle,
 798                                            struct files_struct *fsp,
 799                                            uint32_t *dosmode);
 800
 801         NTSTATUS (*set_dos_attributes_fn)(struct vfs_handle_struct *handle,
 802                                           const struct smb_filename *smb_fname,
 803                                           uint32_t dosmode);
 804
 805         NTSTATUS (*fset_dos_attributes_fn)(struct vfs_handle_struct *hande,
 806                                            struct files_struct *fsp,
 807                                            uint32_t dosmode);
 808
 809         /* NT ACL operations. */
 810
 811         NTSTATUS (*fget_nt_acl_fn)(struct vfs_handle_struct *handle,
 812                                    struct files_struct *fsp,
 813                                    uint32_t security_info,
 814                                    TALLOC_CTX *mem_ctx,
 815                                    struct security_descriptor **ppdesc);
 816         NTSTATUS (*get_nt_acl_fn)(struct vfs_handle_struct *handle,
 817                                   const struct smb_filename *smb_fname,
 818                                   uint32_t security_info,
 819                                    TALLOC_CTX *mem_ctx,
 820                                   struct security_descriptor **ppdesc);
 821         NTSTATUS (*fset_nt_acl_fn)(struct vfs_handle_struct *handle,
 822                                    struct files_struct *fsp,
 823                                    uint32_t security_info_sent,
 824                                    const struct security_descriptor *psd);
 825
 826         NTSTATUS (*audit_file_fn)(struct vfs_handle_struct *handle,
 827                                   struct smb_filename *file,
 828                                   struct security_acl *sacl,
 829                                   uint32_t access_requested,
 830                                   uint32_t access_denied);
 831
 832         /* POSIX ACL operations. */
 833
 834         int (*chmod_acl_fn)(struct vfs_handle_struct *handle,
 835                                         const struct smb_filename *smb_fname,
 836                                         mode_t mode);
 837         int (*fchmod_acl_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, mode_t mode);
 838
 839         SMB_ACL_T (*sys_acl_get_file_fn)(struct vfs_handle_struct *handle,
 840                                          const char *path_p,
 841                                          SMB_ACL_TYPE_T type,
 842                                          TALLOC_CTX *mem_ctx);
 843         SMB_ACL_T (*sys_acl_get_fd_fn)(struct vfs_handle_struct *handle,
 844                                        struct files_struct *fsp,
 845                                        TALLOC_CTX *mem_ctx);
 846         int (*sys_acl_blob_get_file_fn)(struct vfs_handle_struct *handle,
 847                                         const char *path_p,
 848                                         TALLOC_CTX *mem_ctx,
 849                                         char **blob_description,
 850                                         DATA_BLOB *blob);
 851         int (*sys_acl_blob_get_fd_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp,
 852                                       TALLOC_CTX *mem_ctx, char **blob_description,
 853                                       DATA_BLOB *blob);
 854         int (*sys_acl_set_file_fn)(struct vfs_handle_struct *handle, const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl);
 855         int (*sys_acl_set_fd_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_ACL_T theacl);
 856         int (*sys_acl_delete_def_file_fn)(struct vfs_handle_struct *handle, const char *path);
 857
 858         /* EA operations. */
 859         ssize_t (*getxattr_fn)(struct vfs_handle_struct *handle,const char *path, const char *name, void *value, size_t size);
 860         ssize_t (*fgetxattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, void *value, size_t size);
 861         ssize_t (*listxattr_fn)(struct vfs_handle_struct *handle, const char *path, char *list, size_t size);
 862         ssize_t (*flistxattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, char *list, size_t size);
 863         int (*removexattr_fn)(struct vfs_handle_struct *handle, const char *path, const char *name);
 864         int (*fremovexattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name);
 865         int (*setxattr_fn)(struct vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags);
 866         int (*fsetxattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, const void *value, size_t size, int flags);
 867
 868         /* aio operations */
 869         bool (*aio_force_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp);
 870
 871         /* offline operations */
 872         bool (*is_offline_fn)(struct vfs_handle_struct *handle,
 873                            const struct smb_filename *fname,
 874                            SMB_STRUCT_STAT *sbuf);
 875         int (*set_offline_fn)(struct vfs_handle_struct *handle,
 876                            const struct smb_filename *fname);
 877
 878         /* durable handle operations */
 879         NTSTATUS (*durable_cookie_fn)(struct vfs_handle_struct *handle,
 880                                       struct files_struct *fsp,
 881                                       TALLOC_CTX *mem_ctx,
 882                                       DATA_BLOB *cookie);
 883         NTSTATUS (*durable_disconnect_fn)(struct vfs_handle_struct *handle,
 884                                           struct files_struct *fsp,
 885                                           const DATA_BLOB old_cookie,
 886                                           TALLOC_CTX *mem_ctx,
 887                                           DATA_BLOB *new_cookie);
 888         NTSTATUS (*durable_reconnect_fn)(struct vfs_handle_struct *handle,
 889                                          struct smb_request *smb1req,
 890                                          struct smbXsrv_open *op,
 891                                          const DATA_BLOB old_cookie,
 892                                          TALLOC_CTX *mem_ctx,
 893                                          struct files_struct **fsp,
 894                                          DATA_BLOB *new_cookie);
 895
 896         NTSTATUS (*readdir_attr_fn)(struct vfs_handle_struct *handle,
 897                                     const struct smb_filename *fname,
 898                                     TALLOC_CTX *mem_ctx,
 899                                     struct readdir_attr_data **attr_data);
 900 };
 901
 902 /*
 903     VFS operation description. Each VFS module registers an array of vfs_op_tuple to VFS subsystem,
 904     which describes all operations this module is willing to intercept.
 905     VFS subsystem initializes then the conn->vfs_ops and conn->vfs_opaque_ops structs
 906     using this information.
 907 */
 908
 909 typedef struct vfs_handle_struct {
 910         struct vfs_handle_struct  *next, *prev;
 911         const char *param;
 912         struct connection_struct *conn;
 913         const struct vfs_fn_pointers *fns;
 914         void *data;
 915         void (*free_data)(void **data);
 916 } vfs_handle_struct;
 917
 918
 919 typedef struct vfs_statvfs_struct {
 920         /* For undefined recommended transfer size return -1 in that field */
 921         uint32_t OptimalTransferSize;  /* bsize on some os, iosize on other os */
 922         uint32_t BlockSize;
 923
 924         /*
 925          The next three fields are in terms of the block size.
 926          (above). If block size is unknown, 4096 would be a
 927          reasonable block size for a server to report.
 928          Note that returning the blocks/blocksavail removes need
 929          to make a second call (to QFSInfo level 0x103 to get this info.
 930          UserBlockAvail is typically less than or equal to BlocksAvail,
 931          if no distinction is made return the same value in each.
 932         */
 933
 934         uint64_t TotalBlocks;
 935         uint64_t BlocksAvail;       /* bfree */
 936         uint64_t UserBlocksAvail;   /* bavail */
 937
 938         /* For undefined Node fields or FSID return -1 */
 939         uint64_t TotalFileNodes;
 940         uint64_t FreeFileNodes;
 941         uint64_t FsIdentifier;   /* fsid */
 942         /* NB Namelen comes from FILE_SYSTEM_ATTRIBUTE_INFO call */
 943         /* NB flags can come from FILE_SYSTEM_DEVICE_INFO call   */
 944
 945         int FsCapabilities;
 946 } vfs_statvfs_struct;
 947
 948 /* Add a new FSP extension of the given type. Returns a pointer to the
 949  * extenstion data.
 950  */
 951 #define VFS_ADD_FSP_EXTENSION(handle, fsp, type, destroy_fn)            \
 952     vfs_add_fsp_extension_notype(handle, (fsp), sizeof(type), (destroy_fn))
 953
 954 /* Return a pointer to the existing FSP extension data. */
 955 #define VFS_FETCH_FSP_EXTENSION(handle, fsp) \
 956     vfs_fetch_fsp_extension(handle, (fsp))
 957
 958 /* Return the talloc context associated with an FSP extension. */
 959 #define VFS_MEMCTX_FSP_EXTENSION(handle, fsp) \
 960     vfs_memctx_fsp_extension(handle, (fsp))
 961
 962 /* Remove and destroy an FSP extension. */
 963 #define VFS_REMOVE_FSP_EXTENSION(handle, fsp) \
 964     vfs_remove_fsp_extension((handle), (fsp))
 965
 966 #define SMB_VFS_HANDLE_GET_DATA(handle, datap, type, ret) { \
 967         if (!(handle)||((datap=(type *)(handle)->data)==NULL)) { \
 968                 DEBUG(0,("%s() failed to get vfs_handle->data!\n",__FUNCTION__)); \
 969                 ret; \
 970         } \
 971 }
 972
 973 #define SMB_VFS_HANDLE_SET_DATA(handle, datap, free_fn, type, ret) { \
 974         if (!(handle)) { \
 975                 DEBUG(0,("%s() failed to set handle->data!\n",__FUNCTION__)); \
 976                 ret; \
 977         } else { \
 978                 if ((handle)->free_data) { \
 979                         (handle)->free_data(&(handle)->data); \
 980                 } \
 981                 (handle)->data = (void *)datap; \
 982                 (handle)->free_data = free_fn; \
 983         } \
 984 }
 985
 986 #define SMB_VFS_HANDLE_FREE_DATA(handle) { \
 987         if ((handle) && (handle)->free_data) { \
 988                 (handle)->free_data(&(handle)->data); \
 989         } \
 990 }
 991
 992 /* Check whether module-specific data handle was already allocated or not */
 993 #define SMB_VFS_HANDLE_TEST_DATA(handle)  ( !(handle) || !(handle)->data ? False : True )
 994
 995 #define SMB_VFS_OP(x) ((void *) x)
 996
 997 #define DEFAULT_VFS_MODULE_NAME "/[Default VFS]/"
 998
 999 #include "vfs_macros.h"
1000
1001 int smb_vfs_call_connect(struct vfs_handle_struct *handle,
1002                          const char *service, const char *user);
1003 void smb_vfs_call_disconnect(struct vfs_handle_struct *handle);
1004 uint64_t smb_vfs_call_disk_free(struct vfs_handle_struct *handle,
1005                                 const char *path, uint64_t *bsize,
1006                                 uint64_t *dfree, uint64_t *dsize);
1007 int smb_vfs_call_get_quota(struct vfs_handle_struct *handle, const char *path,
1008                            enum SMB_QUOTA_TYPE qtype, unid_t id,
1009                            SMB_DISK_QUOTA *qt);
1010 int smb_vfs_call_set_quota(struct vfs_handle_struct *handle,
1011                            enum SMB_QUOTA_TYPE qtype, unid_t id,
1012                            SMB_DISK_QUOTA *qt);
1013 int smb_vfs_call_get_shadow_copy_data(struct vfs_handle_struct *handle,
1014                                       struct files_struct *fsp,
1015                                       struct shadow_copy_data *shadow_copy_data,
1016                                       bool labels);
1017 int smb_vfs_call_statvfs(struct vfs_handle_struct *handle, const char *path,
1018                          struct vfs_statvfs_struct *statbuf);
1019 uint32_t smb_vfs_call_fs_capabilities(struct vfs_handle_struct *handle,
1020                                       enum timestamp_set_resolution *p_ts_res);
1021 /*
1022  * Note: that "struct dfs_GetDFSReferral *r" needs to be a valid TALLOC_CTX
1023  */
1024 NTSTATUS smb_vfs_call_get_dfs_referrals(struct vfs_handle_struct *handle,
1025                                         struct dfs_GetDFSReferral *r);
1026 DIR *smb_vfs_call_opendir(struct vfs_handle_struct *handle,
1027                         const struct smb_filename *smb_fname,
1028                         const char *mask,
1029                         uint32_t attributes);
1030 DIR *smb_vfs_call_fdopendir(struct vfs_handle_struct *handle,
1031                                         struct files_struct *fsp,
1032                                         const char *mask,
1033                                         uint32_t attributes);
1034 struct dirent *smb_vfs_call_readdir(struct vfs_handle_struct *handle,
1035                                         DIR *dirp,
1036                                         SMB_STRUCT_STAT *sbuf);
1037 void smb_vfs_call_seekdir(struct vfs_handle_struct *handle,
1038                           DIR *dirp, long offset);
1039 long smb_vfs_call_telldir(struct vfs_handle_struct *handle,
1040                           DIR *dirp);
1041 void smb_vfs_call_rewind_dir(struct vfs_handle_struct *handle,
1042                              DIR *dirp);
1043 int smb_vfs_call_mkdir(struct vfs_handle_struct *handle,
1044                         const struct smb_filename *smb_fname,
1045                         mode_t mode);
1046 int smb_vfs_call_rmdir(struct vfs_handle_struct *handle,
1047                         const struct smb_filename *smb_fname);
1048 int smb_vfs_call_closedir(struct vfs_handle_struct *handle,
1049                           DIR *dir);
1050 void smb_vfs_call_init_search_op(struct vfs_handle_struct *handle,
1051                                  DIR *dirp);
1052 int smb_vfs_call_open(struct vfs_handle_struct *handle,
1053                       struct smb_filename *smb_fname, struct files_struct *fsp,
1054                       int flags, mode_t mode);
1055 NTSTATUS smb_vfs_call_create_file(struct vfs_handle_struct *handle,
1056                                   struct smb_request *req,
1057                                   uint16_t root_dir_fid,
1058                                   struct smb_filename *smb_fname,
1059                                   uint32_t access_mask,
1060                                   uint32_t share_access,
1061                                   uint32_t create_disposition,
1062                                   uint32_t create_options,
1063                                   uint32_t file_attributes,
1064                                   uint32_t oplock_request,
1065                                   struct smb2_lease *lease,
1066                                   uint64_t allocation_size,
1067                                   uint32_t private_flags,
1068                                   struct security_descriptor *sd,
1069                                   struct ea_list *ea_list,
1070                                   files_struct **result,
1071                                   int *pinfo,
1072                                   const struct smb2_create_blobs *in_context_blobs,
1073                                   struct smb2_create_blobs *out_context_blobs);
1074 int smb_vfs_call_close(struct vfs_handle_struct *handle,
1075                        struct files_struct *fsp);
1076 ssize_t smb_vfs_call_read(struct vfs_handle_struct *handle,
1077                           struct files_struct *fsp, void *data, size_t n);
1078 ssize_t smb_vfs_call_pread(struct vfs_handle_struct *handle,
1079                            struct files_struct *fsp, void *data, size_t n,
1080                            off_t offset);
1081 struct tevent_req *smb_vfs_call_pread_send(struct vfs_handle_struct *handle,
1082                                            TALLOC_CTX *mem_ctx,
1083                                            struct tevent_context *ev,
1084                                            struct files_struct *fsp,
1085                                            void *data,
1086                                            size_t n, off_t offset);
1087 ssize_t SMB_VFS_PREAD_RECV(struct tevent_req *req, struct vfs_aio_state *state);
1088
1089 ssize_t smb_vfs_call_write(struct vfs_handle_struct *handle,
1090                            struct files_struct *fsp, const void *data,
1091                            size_t n);
1092 ssize_t smb_vfs_call_pwrite(struct vfs_handle_struct *handle,
1093                             struct files_struct *fsp, const void *data,
1094                             size_t n, off_t offset);
1095 struct tevent_req *smb_vfs_call_pwrite_send(struct vfs_handle_struct *handle,
1096                                             TALLOC_CTX *mem_ctx,
1097                                             struct tevent_context *ev,
1098                                             struct files_struct *fsp,
1099                                             const void *data,
1100                                             size_t n, off_t offset);
1101 ssize_t SMB_VFS_PWRITE_RECV(struct tevent_req *req, struct vfs_aio_state *state);
1102
1103 off_t smb_vfs_call_lseek(struct vfs_handle_struct *handle,
1104                              struct files_struct *fsp, off_t offset,
1105                              int whence);
1106 ssize_t smb_vfs_call_sendfile(struct vfs_handle_struct *handle, int tofd,
1107                               files_struct *fromfsp, const DATA_BLOB *header,
1108                               off_t offset, size_t count);
1109 ssize_t smb_vfs_call_recvfile(struct vfs_handle_struct *handle, int fromfd,
1110                               files_struct *tofsp, off_t offset,
1111                               size_t count);
1112 int smb_vfs_call_rename(struct vfs_handle_struct *handle,
1113                         const struct smb_filename *smb_fname_src,
1114                         const struct smb_filename *smb_fname_dst);
1115 int smb_vfs_call_fsync(struct vfs_handle_struct *handle,
1116                        struct files_struct *fsp);
1117
1118 struct tevent_req *smb_vfs_call_fsync_send(struct vfs_handle_struct *handle,
1119                                            TALLOC_CTX *mem_ctx,
1120                                            struct tevent_context *ev,
1121                                            struct files_struct *fsp);
1122 int SMB_VFS_FSYNC_RECV(struct tevent_req *req, struct vfs_aio_state *state);
1123
1124 int smb_vfs_call_stat(struct vfs_handle_struct *handle,
1125                       struct smb_filename *smb_fname);
1126 int smb_vfs_call_fstat(struct vfs_handle_struct *handle,
1127                        struct files_struct *fsp, SMB_STRUCT_STAT *sbuf);
1128 int smb_vfs_call_lstat(struct vfs_handle_struct *handle,
1129                        struct smb_filename *smb_filename);
1130 uint64_t smb_vfs_call_get_alloc_size(struct vfs_handle_struct *handle,
1131                                      struct files_struct *fsp,
1132                                      const SMB_STRUCT_STAT *sbuf);
1133 int smb_vfs_call_unlink(struct vfs_handle_struct *handle,
1134                         const struct smb_filename *smb_fname);
1135 int smb_vfs_call_chmod(struct vfs_handle_struct *handle,
1136                         const struct smb_filename *smb_fname,
1137                         mode_t mode);
1138 int smb_vfs_call_fchmod(struct vfs_handle_struct *handle,
1139                         struct files_struct *fsp, mode_t mode);
1140 int smb_vfs_call_chown(struct vfs_handle_struct *handle,
1141                         const struct smb_filename *smb_fname,
1142                         uid_t uid,
1143                         gid_t gid);
1144 int smb_vfs_call_fchown(struct vfs_handle_struct *handle,
1145                         struct files_struct *fsp, uid_t uid, gid_t gid);
1146 int smb_vfs_call_lchown(struct vfs_handle_struct *handle,
1147                         const struct smb_filename *smb_fname,
1148                         uid_t uid,
1149                         gid_t gid);
1150 int smb_vfs_call_chdir(struct vfs_handle_struct *handle, const char *path);
1151 char *smb_vfs_call_getwd(struct vfs_handle_struct *handle);
1152 int smb_vfs_call_ntimes(struct vfs_handle_struct *handle,
1153                         const struct smb_filename *smb_fname,
1154                         struct smb_file_time *ft);
1155 int smb_vfs_call_ftruncate(struct vfs_handle_struct *handle,
1156                            struct files_struct *fsp, off_t offset);
1157 int smb_vfs_call_fallocate(struct vfs_handle_struct *handle,
1158                            struct files_struct *fsp,
1159                            uint32_t mode,
1160                            off_t offset,
1161                            off_t len);
1162 bool smb_vfs_call_lock(struct vfs_handle_struct *handle,
1163                        struct files_struct *fsp, int op, off_t offset,
1164                        off_t count, int type);
1165 int smb_vfs_call_kernel_flock(struct vfs_handle_struct *handle,
1166                               struct files_struct *fsp, uint32_t share_mode,
1167                               uint32_t access_mask);
1168 int smb_vfs_call_linux_setlease(struct vfs_handle_struct *handle,
1169                                 struct files_struct *fsp, int leasetype);
1170 bool smb_vfs_call_getlock(struct vfs_handle_struct *handle,
1171                           struct files_struct *fsp, off_t *poffset,
1172                           off_t *pcount, int *ptype, pid_t *ppid);
1173 int smb_vfs_call_symlink(struct vfs_handle_struct *handle, const char *oldpath,
1174                          const char *newpath);
1175 int smb_vfs_call_readlink(struct vfs_handle_struct *handle,
1176                           const char *path, char *buf, size_t bufsiz);
1177 int smb_vfs_call_link(struct vfs_handle_struct *handle, const char *oldpath,
1178                       const char *newpath);
1179 int smb_vfs_call_mknod(struct vfs_handle_struct *handle, const char *path,
1180                        mode_t mode, SMB_DEV_T dev);
1181 char *smb_vfs_call_realpath(struct vfs_handle_struct *handle, const char *path);
1182 int smb_vfs_call_chflags(struct vfs_handle_struct *handle, const char *path,
1183                          unsigned int flags);
1184 struct file_id smb_vfs_call_file_id_create(struct vfs_handle_struct *handle,
1185                                            const SMB_STRUCT_STAT *sbuf);
1186 NTSTATUS smb_vfs_call_streaminfo(struct vfs_handle_struct *handle,
1187                                  struct files_struct *fsp,
1188                                  const struct smb_filename *smb_fname,
1189                                  TALLOC_CTX *mem_ctx,
1190                                  unsigned int *num_streams,
1191                                  struct stream_struct **streams);
1192 int smb_vfs_call_get_real_filename(struct vfs_handle_struct *handle,
1193                                    const char *path, const char *name,
1194                                    TALLOC_CTX *mem_ctx, char **found_name);
1195 const char *smb_vfs_call_connectpath(struct vfs_handle_struct *handle,
1196                                      const char *filename);
1197 NTSTATUS smb_vfs_call_brl_lock_windows(struct vfs_handle_struct *handle,
1198                                        struct byte_range_lock *br_lck,
1199                                        struct lock_struct *plock,
1200                                        bool blocking_lock);
1201 bool smb_vfs_call_brl_unlock_windows(struct vfs_handle_struct *handle,
1202                                      struct messaging_context *msg_ctx,
1203                                      struct byte_range_lock *br_lck,
1204                                      const struct lock_struct *plock);
1205 bool smb_vfs_call_brl_cancel_windows(struct vfs_handle_struct *handle,
1206                                      struct byte_range_lock *br_lck,
1207                                      struct lock_struct *plock);
1208 bool smb_vfs_call_strict_lock(struct vfs_handle_struct *handle,
1209                               struct files_struct *fsp,
1210                               struct lock_struct *plock);
1211 void smb_vfs_call_strict_unlock(struct vfs_handle_struct *handle,
1212                                 struct files_struct *fsp,
1213                                 struct lock_struct *plock);
1214 NTSTATUS smb_vfs_call_translate_name(struct vfs_handle_struct *handle,
1215                                      const char *name,
1216                                      enum vfs_translate_direction direction,
1217                                      TALLOC_CTX *mem_ctx,
1218                                      char **mapped_name);
1219 NTSTATUS smb_vfs_call_fsctl(struct vfs_handle_struct *handle,
1220                             struct files_struct *fsp,
1221                             TALLOC_CTX *ctx,
1222                             uint32_t function,
1223                             uint16_t req_flags,
1224                             const uint8_t *_in_data,
1225                             uint32_t in_len,
1226                             uint8_t **_out_data,
1227                             uint32_t max_out_len,
1228                             uint32_t *out_len);
1229 NTSTATUS smb_vfs_call_get_dos_attributes(struct vfs_handle_struct *handle,
1230                                          struct smb_filename *smb_fname,
1231                                          uint32_t *dosmode);
1232 NTSTATUS smb_vfs_call_fget_dos_attributes(struct vfs_handle_struct *handle,
1233                                           struct files_struct *fsp,
1234                                           uint32_t *dosmode);
1235 NTSTATUS smb_vfs_call_set_dos_attributes(struct vfs_handle_struct *handle,
1236                                          const struct smb_filename *smb_fname,
1237                                          uint32_t dosmode);
1238 NTSTATUS smb_vfs_call_fset_dos_attributes(struct vfs_handle_struct *handle,
1239                                           struct files_struct *fsp,
1240                                           uint32_t dosmode);
1241 struct tevent_req *smb_vfs_call_copy_chunk_send(struct vfs_handle_struct *handle,
1242                                                 TALLOC_CTX *mem_ctx,
1243                                                 struct tevent_context *ev,
1244                                                 struct files_struct *src_fsp,
1245                                                 off_t src_off,
1246                                                 struct files_struct *dest_fsp,
1247                                                 off_t dest_off,
1248                                                 off_t num);
1249 NTSTATUS smb_vfs_call_copy_chunk_recv(struct vfs_handle_struct *handle,
1250                                       struct tevent_req *req,
1251                                       off_t *copied);
1252 NTSTATUS smb_vfs_call_get_compression(struct vfs_handle_struct *handle,
1253                                       TALLOC_CTX *mem_ctx,
1254                                       struct files_struct *fsp,
1255                                       struct smb_filename *smb_fname,
1256                                       uint16_t *_compression_fmt);
1257 NTSTATUS smb_vfs_call_set_compression(struct vfs_handle_struct *handle,
1258                                       TALLOC_CTX *mem_ctx,
1259                                       struct files_struct *fsp,
1260                                       uint16_t compression_fmt);
1261 NTSTATUS smb_vfs_call_snap_check_path(vfs_handle_struct *handle,
1262                                       TALLOC_CTX *mem_ctx,
1263                                       const char *service_path,
1264                                       char **base_volume);
1265 NTSTATUS smb_vfs_call_snap_create(struct vfs_handle_struct *handle,
1266                                   TALLOC_CTX *mem_ctx,
1267                                   const char *base_volume,
1268                                   time_t *tstamp,
1269                                   bool rw,
1270                                   char **base_path,
1271                                   char **snap_path);
1272 NTSTATUS smb_vfs_call_snap_delete(struct vfs_handle_struct *handle,
1273                                   TALLOC_CTX *mem_ctx,
1274                                   char *base_path,
1275                                   char *snap_path);
1276 NTSTATUS smb_vfs_call_fget_nt_acl(struct vfs_handle_struct *handle,
1277                                   struct files_struct *fsp,
1278                                   uint32_t security_info,
1279                                   TALLOC_CTX *mem_ctx,
1280                                   struct security_descriptor **ppdesc);
1281 NTSTATUS smb_vfs_call_get_nt_acl(struct vfs_handle_struct *handle,
1282                                  const struct smb_filename *smb_fname,
1283                                  uint32_t security_info,
1284                                  TALLOC_CTX *mem_ctx,
1285                                  struct security_descriptor **ppdesc);
1286 NTSTATUS smb_vfs_call_fset_nt_acl(struct vfs_handle_struct *handle,
1287                                   struct files_struct *fsp,
1288                                   uint32_t security_info_sent,
1289                                   const struct security_descriptor *psd);
1290 NTSTATUS smb_vfs_call_audit_file(struct vfs_handle_struct *handle,
1291                                  struct smb_filename *file,
1292                                  struct security_acl *sacl,
1293                                  uint32_t access_requested,
1294                                  uint32_t access_denied);
1295 int smb_vfs_call_chmod_acl(struct vfs_handle_struct *handle,
1296                                 const struct smb_filename *file,
1297                                 mode_t mode);
1298 int smb_vfs_call_fchmod_acl(struct vfs_handle_struct *handle,
1299                             struct files_struct *fsp, mode_t mode);
1300 SMB_ACL_T smb_vfs_call_sys_acl_get_file(struct vfs_handle_struct *handle,
1301                                         const char *path_p,
1302                                         SMB_ACL_TYPE_T type,
1303                                         TALLOC_CTX *mem_ctx);
1304 SMB_ACL_T smb_vfs_call_sys_acl_get_fd(struct vfs_handle_struct *handle,
1305                                       struct files_struct *fsp,
1306                                       TALLOC_CTX *mem_ctx);
1307 int smb_vfs_call_sys_acl_blob_get_file(struct vfs_handle_struct *handle,
1308                                        const char *path_p,
1309                                        TALLOC_CTX *mem_ctx,
1310                                        char **blob_description,
1311                                        DATA_BLOB *blob);
1312 int smb_vfs_call_sys_acl_blob_get_fd(struct vfs_handle_struct *handle,
1313                                      struct files_struct *fsp,
1314                                      TALLOC_CTX *mem_ctx,
1315                                      char **blob_description,
1316                                      DATA_BLOB *blob);
1317 int smb_vfs_call_sys_acl_set_file(struct vfs_handle_struct *handle,
1318                                   const char *name, SMB_ACL_TYPE_T acltype,
1319                                   SMB_ACL_T theacl);
1320 int smb_vfs_call_sys_acl_set_fd(struct vfs_handle_struct *handle,
1321                                 struct files_struct *fsp, SMB_ACL_T theacl);
1322 int smb_vfs_call_sys_acl_delete_def_file(struct vfs_handle_struct *handle,
1323                                          const char *path);
1324 ssize_t smb_vfs_call_getxattr(struct vfs_handle_struct *handle,
1325                               const char *path, const char *name, void *value,
1326                               size_t size);
1327 ssize_t smb_vfs_call_fgetxattr(struct vfs_handle_struct *handle,
1328                                struct files_struct *fsp, const char *name,
1329                                void *value, size_t size);
1330 ssize_t smb_vfs_call_listxattr(struct vfs_handle_struct *handle,
1331                                const char *path, char *list, size_t size);
1332 ssize_t smb_vfs_call_llistxattr(struct vfs_handle_struct *handle,
1333                                 const char *path, char *list, size_t size);
1334 ssize_t smb_vfs_call_flistxattr(struct vfs_handle_struct *handle,
1335                                 struct files_struct *fsp, char *list,
1336                                 size_t size);
1337 int smb_vfs_call_removexattr(struct vfs_handle_struct *handle,
1338                              const char *path, const char *name);
1339 int smb_vfs_call_fremovexattr(struct vfs_handle_struct *handle,
1340                               struct files_struct *fsp, const char *name);
1341 int smb_vfs_call_setxattr(struct vfs_handle_struct *handle, const char *path,
1342                           const char *name, const void *value, size_t size,
1343                           int flags);
1344 int smb_vfs_call_lsetxattr(struct vfs_handle_struct *handle, const char *path,
1345                            const char *name, const void *value, size_t size,
1346                            int flags);
1347 int smb_vfs_call_fsetxattr(struct vfs_handle_struct *handle,
1348                            struct files_struct *fsp, const char *name,
1349                            const void *value, size_t size, int flags);
1350 bool smb_vfs_call_aio_force(struct vfs_handle_struct *handle,
1351                             struct files_struct *fsp);
1352 bool smb_vfs_call_is_offline(struct vfs_handle_struct *handle,
1353                              const struct smb_filename *fname,
1354                              SMB_STRUCT_STAT *sbuf);
1355 int smb_vfs_call_set_offline(struct vfs_handle_struct *handle,
1356                              const struct smb_filename *fname);
1357 NTSTATUS smb_vfs_call_durable_cookie(struct vfs_handle_struct *handle,
1358                                      struct files_struct *fsp,
1359                                      TALLOC_CTX *mem_ctx,
1360                                      DATA_BLOB *cookie);
1361 NTSTATUS smb_vfs_call_durable_disconnect(struct vfs_handle_struct *handle,
1362                                          struct files_struct *fsp,
1363                                          const DATA_BLOB old_cookie,
1364                                          TALLOC_CTX *mem_ctx,
1365                                          DATA_BLOB *new_cookie);
1366 NTSTATUS smb_vfs_call_durable_reconnect(struct vfs_handle_struct *handle,
1367                                         struct smb_request *smb1req,
1368                                         struct smbXsrv_open *op,
1369                                         const DATA_BLOB old_cookie,
1370                                         TALLOC_CTX *mem_ctx,
1371                                         struct files_struct **fsp,
1372                                         DATA_BLOB *new_cookie);
1373 NTSTATUS smb_vfs_call_readdir_attr(struct vfs_handle_struct *handle,
1374                                    const struct smb_filename *fname,
1375                                    TALLOC_CTX *mem_ctx,
1376                                    struct readdir_attr_data **attr_data);
1377
1378 NTSTATUS smb_register_vfs(int version, const char *name,
1379                           const struct vfs_fn_pointers *fns);
1380 void *vfs_add_fsp_extension_notype(vfs_handle_struct *handle,
1381                                    files_struct *fsp, size_t ext_size,
1382                                    void (*destroy_fn)(void *p_data));
1383 void vfs_remove_fsp_extension(vfs_handle_struct *handle, files_struct *fsp);
1384 void vfs_remove_all_fsp_extensions(struct files_struct *fsp);
1385 void *vfs_memctx_fsp_extension(vfs_handle_struct *handle, files_struct *fsp);
1386 void *vfs_fetch_fsp_extension(vfs_handle_struct *handle, files_struct *fsp);
1387
1388 void smb_vfs_assert_all_fns(const struct vfs_fn_pointers* fns,
1389                             const char *module);
1390
1391 #endif /* _VFS_H */