examples/VFS/skel_transparent.c

   1 /*
   2  * Skeleton VFS module.  Implements passthrough operation of all VFS
   3  * calls to disk functions.
   4  *
   5  * Copyright (C) Tim Potter, 1999-2000
   6  * Copyright (C) Alexander Bokovoy, 2002
   7  * Copyright (C) Stefan (metze) Metzmacher, 2003
   8  * Copyright (C) Jeremy Allison 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
  24 #include "../source3/include/includes.h"
  25 #include "lib/util/tevent_unix.h"
  26 #include "lib/util/tevent_ntstatus.h"
  27
  28 /* PLEASE,PLEASE READ THE VFS MODULES CHAPTER OF THE
  29    SAMBA DEVELOPERS GUIDE!!!!!!
  30  */
  31
  32 /* If you take this file as template for your module
  33  * please make sure that you remove all skel_XXX() functions you don't
  34  * want to implement!! The passthrough operations are not
  35  * neccessary in a real module.
  36  *
  37  * --metze
  38  */
  39
  40 static int skel_connect(vfs_handle_struct *handle, const char *service,
  41                         const char *user)
  42 {
  43         return SMB_VFS_NEXT_CONNECT(handle, service, user);
  44 }
  45
  46 static void skel_disconnect(vfs_handle_struct *handle)
  47 {
  48         SMB_VFS_NEXT_DISCONNECT(handle);
  49 }
  50
  51 static uint64_t skel_disk_free(vfs_handle_struct *handle,
  52                                 const struct smb_filename *smb_fname,
  53                                 uint64_t *bsize,
  54                                 uint64_t *dfree,
  55                                 uint64_t *dsize)
  56 {
  57         return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname, bsize, dfree, dsize);
  58 }
  59
  60 static int skel_get_quota(vfs_handle_struct *handle,
  61                                 const struct smb_filename *smb_fname,
  62                                 enum SMB_QUOTA_TYPE qtype,
  63                                 unid_t id,
  64                                 SMB_DISK_QUOTA *dq)
  65 {
  66         return SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname, qtype, id, dq);
  67 }
  68
  69 static int skel_set_quota(vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype,
  70                           unid_t id, SMB_DISK_QUOTA *dq)
  71 {
  72         return SMB_VFS_NEXT_SET_QUOTA(handle, qtype, id, dq);
  73 }
  74
  75 static int skel_get_shadow_copy_data(vfs_handle_struct *handle,
  76                                      files_struct *fsp,
  77                                      struct shadow_copy_data *shadow_copy_data,
  78                                      bool labels)
  79 {
  80         return SMB_VFS_NEXT_GET_SHADOW_COPY_DATA(handle, fsp, shadow_copy_data,
  81                                                  labels);
  82 }
  83
  84 static int skel_statvfs(struct vfs_handle_struct *handle, const char *path,
  85                         struct vfs_statvfs_struct *statbuf)
  86 {
  87         return SMB_VFS_NEXT_STATVFS(handle, path, statbuf);
  88 }
  89
  90 static uint32_t skel_fs_capabilities(struct vfs_handle_struct *handle,
  91                                      enum timestamp_set_resolution *p_ts_res)
  92 {
  93         return SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res);
  94 }
  95
  96 static NTSTATUS skel_get_dfs_referrals(struct vfs_handle_struct *handle,
  97                                        struct dfs_GetDFSReferral *r)
  98 {
  99         return SMB_VFS_NEXT_GET_DFS_REFERRALS(handle, r);
 100 }
 101
 102 static DIR *skel_opendir(vfs_handle_struct *handle,
 103                         const struct smb_filename *smb_fname,
 104                         const char *mask,
 105                         uint32_t attr)
 106 {
 107         return SMB_VFS_NEXT_OPENDIR(handle, smb_fname, mask, attr);
 108 }
 109
 110 static NTSTATUS skel_snap_check_path(struct vfs_handle_struct *handle,
 111                                      TALLOC_CTX *mem_ctx,
 112                                      const char *service_path,
 113                                      char **base_volume)
 114 {
 115         return SMB_VFS_NEXT_SNAP_CHECK_PATH(handle, mem_ctx, service_path,
 116                                             base_volume);
 117 }
 118
 119 static NTSTATUS skel_snap_create(struct vfs_handle_struct *handle,
 120                                  TALLOC_CTX *mem_ctx,
 121                                  const char *base_volume,
 122                                  time_t *tstamp,
 123                                  bool rw,
 124                                  char **base_path,
 125                                  char **snap_path)
 126 {
 127         return SMB_VFS_NEXT_SNAP_CREATE(handle, mem_ctx, base_volume, tstamp,
 128                                         rw, base_path, snap_path);
 129 }
 130
 131 static NTSTATUS skel_snap_delete(struct vfs_handle_struct *handle,
 132                                  TALLOC_CTX *mem_ctx,
 133                                  char *base_path,
 134                                  char *snap_path)
 135 {
 136         return SMB_VFS_NEXT_SNAP_DELETE(handle, mem_ctx, base_path, snap_path);
 137 }
 138
 139 static DIR *skel_fdopendir(vfs_handle_struct *handle, files_struct *fsp,
 140                            const char *mask, uint32_t attr)
 141 {
 142         return SMB_VFS_NEXT_FDOPENDIR(handle, fsp, mask, attr);
 143 }
 144
 145 static struct dirent *skel_readdir(vfs_handle_struct *handle,
 146                                    DIR *dirp, SMB_STRUCT_STAT *sbuf)
 147 {
 148         return SMB_VFS_NEXT_READDIR(handle, dirp, sbuf);
 149 }
 150
 151 static void skel_seekdir(vfs_handle_struct *handle, DIR *dirp, long offset)
 152 {
 153         SMB_VFS_NEXT_SEEKDIR(handle, dirp, offset);
 154 }
 155
 156 static long skel_telldir(vfs_handle_struct *handle, DIR *dirp)
 157 {
 158         return SMB_VFS_NEXT_TELLDIR(handle, dirp);
 159 }
 160
 161 static void skel_rewind_dir(vfs_handle_struct *handle, DIR *dirp)
 162 {
 163         SMB_VFS_NEXT_REWINDDIR(handle, dirp);
 164 }
 165
 166 static int skel_mkdir(vfs_handle_struct *handle,
 167                 const struct smb_filename *smb_fname,
 168                 mode_t mode)
 169 {
 170         return SMB_VFS_NEXT_MKDIR(handle, smb_fname, mode);
 171 }
 172
 173 static int skel_rmdir(vfs_handle_struct *handle,
 174                 const struct smb_filename *smb_fname)
 175 {
 176         return SMB_VFS_NEXT_RMDIR(handle, smb_fname);
 177 }
 178
 179 static int skel_closedir(vfs_handle_struct *handle, DIR *dir)
 180 {
 181         return SMB_VFS_NEXT_CLOSEDIR(handle, dir);
 182 }
 183
 184 static void skel_init_search_op(struct vfs_handle_struct *handle, DIR *dirp)
 185 {
 186         SMB_VFS_NEXT_INIT_SEARCH_OP(handle, dirp);
 187 }
 188
 189 static int skel_open(vfs_handle_struct *handle, struct smb_filename *smb_fname,
 190                      files_struct *fsp, int flags, mode_t mode)
 191 {
 192         return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 193 }
 194
 195 static NTSTATUS skel_create_file(struct vfs_handle_struct *handle,
 196                                  struct smb_request *req,
 197                                  uint16_t root_dir_fid,
 198                                  struct smb_filename *smb_fname,
 199                                  uint32_t access_mask,
 200                                  uint32_t share_access,
 201                                  uint32_t create_disposition,
 202                                  uint32_t create_options,
 203                                  uint32_t file_attributes,
 204                                  uint32_t oplock_request,
 205                                  struct smb2_lease *lease,
 206                                  uint64_t allocation_size,
 207                                  uint32_t private_flags,
 208                                  struct security_descriptor *sd,
 209                                  struct ea_list *ea_list,
 210                                  files_struct ** result, int *pinfo,
 211                                  const struct smb2_create_blobs *in_context_blobs,
 212                                  struct smb2_create_blobs *out_context_blobs)
 213 {
 214         return SMB_VFS_NEXT_CREATE_FILE(handle,
 215                                         req,
 216                                         root_dir_fid,
 217                                         smb_fname,
 218                                         access_mask,
 219                                         share_access,
 220                                         create_disposition,
 221                                         create_options,
 222                                         file_attributes,
 223                                         oplock_request,
 224                                         lease,
 225                                         allocation_size,
 226                                         private_flags,
 227                                         sd, ea_list, result, pinfo,
 228                                         in_context_blobs, out_context_blobs);
 229 }
 230
 231 static int skel_close_fn(vfs_handle_struct *handle, files_struct *fsp)
 232 {
 233         return SMB_VFS_NEXT_CLOSE(handle, fsp);
 234 }
 235
 236 static ssize_t skel_vfs_read(vfs_handle_struct *handle, files_struct *fsp,
 237                              void *data, size_t n)
 238 {
 239         return SMB_VFS_NEXT_READ(handle, fsp, data, n);
 240 }
 241
 242 static ssize_t skel_pread(vfs_handle_struct *handle, files_struct *fsp,
 243                           void *data, size_t n, off_t offset)
 244 {
 245         return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
 246 }
 247
 248 struct skel_pread_state {
 249         ssize_t ret;
 250         struct vfs_aio_state vfs_aio_state;
 251 };
 252
 253 static void skel_pread_done(struct tevent_req *subreq);
 254
 255 static struct tevent_req *skel_pread_send(struct vfs_handle_struct *handle,
 256                                           TALLOC_CTX *mem_ctx,
 257                                           struct tevent_context *ev,
 258                                           struct files_struct *fsp,
 259                                           void *data, size_t n, off_t offset)
 260 {
 261         struct tevent_req *req, *subreq;
 262         struct skel_pread_state *state;
 263
 264         req = tevent_req_create(mem_ctx, &state, struct skel_pread_state);
 265         if (req == NULL) {
 266                 return NULL;
 267         }
 268         subreq = SMB_VFS_NEXT_PREAD_SEND(state, ev, handle, fsp, data,
 269                                          n, offset);
 270         if (tevent_req_nomem(subreq, req)) {
 271                 return tevent_req_post(req, ev);
 272         }
 273         tevent_req_set_callback(subreq, skel_pread_done, req);
 274         return req;
 275 }
 276
 277 static void skel_pread_done(struct tevent_req *subreq)
 278 {
 279         struct tevent_req *req =
 280             tevent_req_callback_data(subreq, struct tevent_req);
 281         struct skel_pread_state *state =
 282             tevent_req_data(req, struct skel_pread_state);
 283
 284         state->ret = SMB_VFS_PREAD_RECV(subreq, &state->vfs_aio_state);
 285         TALLOC_FREE(subreq);
 286         tevent_req_done(req);
 287 }
 288
 289 static ssize_t skel_pread_recv(struct tevent_req *req,
 290                                struct vfs_aio_state *vfs_aio_state)
 291 {
 292         struct skel_pread_state *state =
 293             tevent_req_data(req, struct skel_pread_state);
 294
 295         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 296                 return -1;
 297         }
 298         *vfs_aio_state = state->vfs_aio_state;
 299         return state->ret;
 300 }
 301
 302 static ssize_t skel_write(vfs_handle_struct *handle, files_struct *fsp,
 303                           const void *data, size_t n)
 304 {
 305         return SMB_VFS_NEXT_WRITE(handle, fsp, data, n);
 306 }
 307
 308 static ssize_t skel_pwrite(vfs_handle_struct *handle, files_struct *fsp,
 309                            const void *data, size_t n, off_t offset)
 310 {
 311         return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 312 }
 313
 314 struct skel_pwrite_state {
 315         ssize_t ret;
 316         struct vfs_aio_state vfs_aio_state;
 317 };
 318
 319 static void skel_pwrite_done(struct tevent_req *subreq);
 320
 321 static struct tevent_req *skel_pwrite_send(struct vfs_handle_struct *handle,
 322                                            TALLOC_CTX *mem_ctx,
 323                                            struct tevent_context *ev,
 324                                            struct files_struct *fsp,
 325                                            const void *data,
 326                                            size_t n, off_t offset)
 327 {
 328         struct tevent_req *req, *subreq;
 329         struct skel_pwrite_state *state;
 330
 331         req = tevent_req_create(mem_ctx, &state, struct skel_pwrite_state);
 332         if (req == NULL) {
 333                 return NULL;
 334         }
 335         subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp, data,
 336                                           n, offset);
 337         if (tevent_req_nomem(subreq, req)) {
 338                 return tevent_req_post(req, ev);
 339         }
 340         tevent_req_set_callback(subreq, skel_pwrite_done, req);
 341         return req;
 342 }
 343
 344 static void skel_pwrite_done(struct tevent_req *subreq)
 345 {
 346         struct tevent_req *req =
 347             tevent_req_callback_data(subreq, struct tevent_req);
 348         struct skel_pwrite_state *state =
 349             tevent_req_data(req, struct skel_pwrite_state);
 350
 351         state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
 352         TALLOC_FREE(subreq);
 353         tevent_req_done(req);
 354 }
 355
 356 static ssize_t skel_pwrite_recv(struct tevent_req *req,
 357                                 struct vfs_aio_state *vfs_aio_state)
 358 {
 359         struct skel_pwrite_state *state =
 360             tevent_req_data(req, struct skel_pwrite_state);
 361
 362         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 363                 return -1;
 364         }
 365         *vfs_aio_state = state->vfs_aio_state;
 366         return state->ret;
 367 }
 368
 369 static off_t skel_lseek(vfs_handle_struct *handle, files_struct *fsp,
 370                         off_t offset, int whence)
 371 {
 372         return SMB_VFS_NEXT_LSEEK(handle, fsp, offset, whence);
 373 }
 374
 375 static ssize_t skel_sendfile(vfs_handle_struct *handle, int tofd,
 376                              files_struct *fromfsp, const DATA_BLOB *hdr,
 377                              off_t offset, size_t n)
 378 {
 379         return SMB_VFS_NEXT_SENDFILE(handle, tofd, fromfsp, hdr, offset, n);
 380 }
 381
 382 static ssize_t skel_recvfile(vfs_handle_struct *handle, int fromfd,
 383                              files_struct *tofsp, off_t offset, size_t n)
 384 {
 385         return SMB_VFS_NEXT_RECVFILE(handle, fromfd, tofsp, offset, n);
 386 }
 387
 388 static int skel_rename(vfs_handle_struct *handle,
 389                        const struct smb_filename *smb_fname_src,
 390                        const struct smb_filename *smb_fname_dst)
 391 {
 392         return SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 393 }
 394
 395 static int skel_fsync(vfs_handle_struct *handle, files_struct *fsp)
 396 {
 397         return SMB_VFS_NEXT_FSYNC(handle, fsp);
 398 }
 399
 400 struct skel_fsync_state {
 401         int ret;
 402         struct vfs_aio_state vfs_aio_state;
 403 };
 404
 405 static void skel_fsync_done(struct tevent_req *subreq);
 406
 407 static struct tevent_req *skel_fsync_send(struct vfs_handle_struct *handle,
 408                                           TALLOC_CTX *mem_ctx,
 409                                           struct tevent_context *ev,
 410                                           struct files_struct *fsp)
 411 {
 412         struct tevent_req *req, *subreq;
 413         struct skel_fsync_state *state;
 414
 415         req = tevent_req_create(mem_ctx, &state, struct skel_fsync_state);
 416         if (req == NULL) {
 417                 return NULL;
 418         }
 419         subreq = SMB_VFS_NEXT_FSYNC_SEND(state, ev, handle, fsp);
 420         if (tevent_req_nomem(subreq, req)) {
 421                 return tevent_req_post(req, ev);
 422         }
 423         tevent_req_set_callback(subreq, skel_fsync_done, req);
 424         return req;
 425 }
 426
 427 static void skel_fsync_done(struct tevent_req *subreq)
 428 {
 429         struct tevent_req *req =
 430             tevent_req_callback_data(subreq, struct tevent_req);
 431         struct skel_fsync_state *state =
 432             tevent_req_data(req, struct skel_fsync_state);
 433
 434         state->ret = SMB_VFS_FSYNC_RECV(subreq, &state->vfs_aio_state);
 435         TALLOC_FREE(subreq);
 436         tevent_req_done(req);
 437 }
 438
 439 static int skel_fsync_recv(struct tevent_req *req,
 440                            struct vfs_aio_state *vfs_aio_state)
 441 {
 442         struct skel_fsync_state *state =
 443             tevent_req_data(req, struct skel_fsync_state);
 444
 445         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 446                 return -1;
 447         }
 448         *vfs_aio_state = state->vfs_aio_state;
 449         return state->ret;
 450 }
 451
 452 static int skel_stat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
 453 {
 454         return SMB_VFS_NEXT_STAT(handle, smb_fname);
 455 }
 456
 457 static int skel_fstat(vfs_handle_struct *handle, files_struct *fsp,
 458                       SMB_STRUCT_STAT *sbuf)
 459 {
 460         return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
 461 }
 462
 463 static int skel_lstat(vfs_handle_struct *handle,
 464                       struct smb_filename *smb_fname)
 465 {
 466         return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
 467 }
 468
 469 static uint64_t skel_get_alloc_size(struct vfs_handle_struct *handle,
 470                                     struct files_struct *fsp,
 471                                     const SMB_STRUCT_STAT *sbuf)
 472 {
 473         return SMB_VFS_NEXT_GET_ALLOC_SIZE(handle, fsp, sbuf);
 474 }
 475
 476 static int skel_unlink(vfs_handle_struct *handle,
 477                        const struct smb_filename *smb_fname)
 478 {
 479         return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 480 }
 481
 482 static int skel_chmod(vfs_handle_struct *handle,
 483                         const struct smb_filename *smb_fname,
 484                         mode_t mode)
 485 {
 486         return SMB_VFS_NEXT_CHMOD(handle, smb_fname, mode);
 487 }
 488
 489 static int skel_fchmod(vfs_handle_struct *handle, files_struct *fsp,
 490                        mode_t mode)
 491 {
 492         return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 493 }
 494
 495 static int skel_chown(vfs_handle_struct *handle,
 496                         const struct smb_filename *smb_fname,
 497                         uid_t uid,
 498                         gid_t gid)
 499 {
 500         return SMB_VFS_NEXT_CHOWN(handle, smb_fname, uid, gid);
 501 }
 502
 503 static int skel_fchown(vfs_handle_struct *handle, files_struct *fsp,
 504                        uid_t uid, gid_t gid)
 505 {
 506         return SMB_VFS_NEXT_FCHOWN(handle, fsp, uid, gid);
 507 }
 508
 509 static int skel_lchown(vfs_handle_struct *handle,
 510                         const struct smb_filename *smb_fname,
 511                         uid_t uid,
 512                         gid_t gid)
 513 {
 514         return SMB_VFS_NEXT_LCHOWN(handle, smb_fname, uid, gid);
 515 }
 516
 517 static int skel_chdir(vfs_handle_struct *handle, const char *path)
 518 {
 519         return SMB_VFS_NEXT_CHDIR(handle, path);
 520 }
 521
 522 static char *skel_getwd(vfs_handle_struct *handle)
 523 {
 524         return SMB_VFS_NEXT_GETWD(handle);
 525 }
 526
 527 static int skel_ntimes(vfs_handle_struct *handle,
 528                        const struct smb_filename *smb_fname,
 529                        struct smb_file_time *ft)
 530 {
 531         return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft);
 532 }
 533
 534 static int skel_ftruncate(vfs_handle_struct *handle, files_struct *fsp,
 535                           off_t offset)
 536 {
 537         return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
 538 }
 539
 540 static int skel_fallocate(vfs_handle_struct *handle, files_struct *fsp,
 541                           uint32_t mode, off_t offset, off_t len)
 542 {
 543         return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
 544 }
 545
 546 static bool skel_lock(vfs_handle_struct *handle, files_struct *fsp, int op,
 547                       off_t offset, off_t count, int type)
 548 {
 549         return SMB_VFS_NEXT_LOCK(handle, fsp, op, offset, count, type);
 550 }
 551
 552 static int skel_kernel_flock(struct vfs_handle_struct *handle,
 553                              struct files_struct *fsp, uint32_t share_mode,
 554                              uint32_t access_mask)
 555 {
 556         return SMB_VFS_NEXT_KERNEL_FLOCK(handle, fsp, share_mode, access_mask);
 557 }
 558
 559 static int skel_linux_setlease(struct vfs_handle_struct *handle,
 560                                struct files_struct *fsp, int leasetype)
 561 {
 562         return SMB_VFS_NEXT_LINUX_SETLEASE(handle, fsp, leasetype);
 563 }
 564
 565 static bool skel_getlock(vfs_handle_struct *handle, files_struct *fsp,
 566                          off_t *poffset, off_t *pcount, int *ptype,
 567                          pid_t *ppid)
 568 {
 569         return SMB_VFS_NEXT_GETLOCK(handle, fsp, poffset, pcount, ptype, ppid);
 570 }
 571
 572 static int skel_symlink(vfs_handle_struct *handle, const char *oldpath,
 573                         const char *newpath)
 574 {
 575         return SMB_VFS_NEXT_SYMLINK(handle, oldpath, newpath);
 576 }
 577
 578 static int skel_vfs_readlink(vfs_handle_struct *handle, const char *path,
 579                              char *buf, size_t bufsiz)
 580 {
 581         return SMB_VFS_NEXT_READLINK(handle, path, buf, bufsiz);
 582 }
 583
 584 static int skel_link(vfs_handle_struct *handle,
 585                         const struct smb_filename *old_smb_fname,
 586                         const struct smb_filename *new_smb_fname)
 587 {
 588         return SMB_VFS_NEXT_LINK(handle, old_smb_fname, new_smb_fname);
 589 }
 590
 591 static int skel_mknod(vfs_handle_struct *handle,
 592                         const struct smb_filename *smb_fname,
 593                         mode_t mode,
 594                         SMB_DEV_T dev)
 595 {
 596         return SMB_VFS_NEXT_MKNOD(handle, smb_fname, mode, dev);
 597 }
 598
 599 static char *skel_realpath(vfs_handle_struct *handle, const char *path)
 600 {
 601         return SMB_VFS_NEXT_REALPATH(handle, path);
 602 }
 603
 604 static int skel_chflags(vfs_handle_struct *handle,
 605                         const struct smb_filename *smb_fname,
 606                         uint flags)
 607 {
 608         return SMB_VFS_NEXT_CHFLAGS(handle, smb_fname, flags);
 609 }
 610
 611 static struct file_id skel_file_id_create(vfs_handle_struct *handle,
 612                                           const SMB_STRUCT_STAT *sbuf)
 613 {
 614         return SMB_VFS_NEXT_FILE_ID_CREATE(handle, sbuf);
 615 }
 616
 617 struct skel_cc_state {
 618         struct vfs_handle_struct *handle;
 619         off_t copied;
 620 };
 621 static void skel_copy_chunk_done(struct tevent_req *subreq);
 622
 623 static struct tevent_req *skel_copy_chunk_send(struct vfs_handle_struct *handle,
 624                                                TALLOC_CTX *mem_ctx,
 625                                                struct tevent_context *ev,
 626                                                struct files_struct *src_fsp,
 627                                                off_t src_off,
 628                                                struct files_struct *dest_fsp,
 629                                                off_t dest_off,
 630                                                off_t num,
 631                                                uint32_t flags)
 632 {
 633         struct tevent_req *req;
 634         struct tevent_req *subreq;
 635         struct skel_cc_state *cc_state;
 636
 637         req = tevent_req_create(mem_ctx, &cc_state, struct skel_cc_state);
 638         if (req == NULL) {
 639                 return NULL;
 640         }
 641
 642         cc_state->handle = handle;
 643         subreq = SMB_VFS_NEXT_COPY_CHUNK_SEND(handle, cc_state, ev,
 644                                               src_fsp, src_off,
 645                                               dest_fsp, dest_off, num, flags);
 646         if (tevent_req_nomem(subreq, req)) {
 647                 return tevent_req_post(req, ev);
 648         }
 649
 650         tevent_req_set_callback(subreq, skel_copy_chunk_done, req);
 651         return req;
 652 }
 653
 654 static void skel_copy_chunk_done(struct tevent_req *subreq)
 655 {
 656         struct tevent_req *req = tevent_req_callback_data(
 657                 subreq, struct tevent_req);
 658         struct skel_cc_state *cc_state
 659                         = tevent_req_data(req, struct skel_cc_state);
 660         NTSTATUS status;
 661
 662         status = SMB_VFS_NEXT_COPY_CHUNK_RECV(cc_state->handle,
 663                                               subreq,
 664                                               &cc_state->copied);
 665         TALLOC_FREE(subreq);
 666         if (tevent_req_nterror(req, status)) {
 667                 return;
 668         }
 669         tevent_req_done(req);
 670 }
 671
 672 static NTSTATUS skel_copy_chunk_recv(struct vfs_handle_struct *handle,
 673                                      struct tevent_req *req,
 674                                      off_t *copied)
 675 {
 676         struct skel_cc_state *cc_state
 677                         = tevent_req_data(req, struct skel_cc_state);
 678         NTSTATUS status;
 679
 680         *copied = cc_state->copied;
 681         if (tevent_req_is_nterror(req, &status)) {
 682                 tevent_req_received(req);
 683                 return status;
 684         }
 685
 686         tevent_req_received(req);
 687         return NT_STATUS_OK;
 688 }
 689
 690 static NTSTATUS skel_get_compression(struct vfs_handle_struct *handle,
 691                                      TALLOC_CTX *mem_ctx,
 692                                      struct files_struct *fsp,
 693                                      struct smb_filename *smb_fname,
 694                                      uint16_t *_compression_fmt)
 695 {
 696         return SMB_VFS_NEXT_GET_COMPRESSION(handle, mem_ctx, fsp, smb_fname,
 697                                             _compression_fmt);
 698 }
 699
 700 static NTSTATUS skel_set_compression(struct vfs_handle_struct *handle,
 701                                      TALLOC_CTX *mem_ctx,
 702                                      struct files_struct *fsp,
 703                                      uint16_t compression_fmt)
 704 {
 705         return SMB_VFS_NEXT_SET_COMPRESSION(handle, mem_ctx, fsp,
 706                                             compression_fmt);
 707 }
 708
 709 static NTSTATUS skel_streaminfo(struct vfs_handle_struct *handle,
 710                                 struct files_struct *fsp,
 711                                 const struct smb_filename *smb_fname,
 712                                 TALLOC_CTX *mem_ctx,
 713                                 unsigned int *num_streams,
 714                                 struct stream_struct **streams)
 715 {
 716         return SMB_VFS_NEXT_STREAMINFO(handle,
 717                                 fsp,
 718                                 smb_fname,
 719                                 mem_ctx,
 720                                 num_streams,
 721                                 streams);
 722 }
 723
 724 static int skel_get_real_filename(struct vfs_handle_struct *handle,
 725                                   const char *path,
 726                                   const char *name,
 727                                   TALLOC_CTX *mem_ctx, char **found_name)
 728 {
 729         return SMB_VFS_NEXT_GET_REAL_FILENAME(handle,
 730                                               path, name, mem_ctx, found_name);
 731 }
 732
 733 static const char *skel_connectpath(struct vfs_handle_struct *handle,
 734                                     const char *filename)
 735 {
 736         return SMB_VFS_NEXT_CONNECTPATH(handle, filename);
 737 }
 738
 739 static NTSTATUS skel_brl_lock_windows(struct vfs_handle_struct *handle,
 740                                       struct byte_range_lock *br_lck,
 741                                       struct lock_struct *plock,
 742                                       bool blocking_lock)
 743 {
 744         return SMB_VFS_NEXT_BRL_LOCK_WINDOWS(handle,
 745                                              br_lck, plock, blocking_lock);
 746 }
 747
 748 static bool skel_brl_unlock_windows(struct vfs_handle_struct *handle,
 749                                     struct messaging_context *msg_ctx,
 750                                     struct byte_range_lock *br_lck,
 751                                     const struct lock_struct *plock)
 752 {
 753         return SMB_VFS_NEXT_BRL_UNLOCK_WINDOWS(handle, msg_ctx, br_lck, plock);
 754 }
 755
 756 static bool skel_brl_cancel_windows(struct vfs_handle_struct *handle,
 757                                     struct byte_range_lock *br_lck,
 758                                     struct lock_struct *plock)
 759 {
 760         return SMB_VFS_NEXT_BRL_CANCEL_WINDOWS(handle, br_lck, plock);
 761 }
 762
 763 static bool skel_strict_lock(struct vfs_handle_struct *handle,
 764                              struct files_struct *fsp,
 765                              struct lock_struct *plock)
 766 {
 767         return SMB_VFS_NEXT_STRICT_LOCK(handle, fsp, plock);
 768 }
 769
 770 static void skel_strict_unlock(struct vfs_handle_struct *handle,
 771                                struct files_struct *fsp,
 772                                struct lock_struct *plock)
 773 {
 774         SMB_VFS_NEXT_STRICT_UNLOCK(handle, fsp, plock);
 775 }
 776
 777 static NTSTATUS skel_translate_name(struct vfs_handle_struct *handle,
 778                                     const char *mapped_name,
 779                                     enum vfs_translate_direction direction,
 780                                     TALLOC_CTX *mem_ctx, char **pmapped_name)
 781 {
 782         return SMB_VFS_NEXT_TRANSLATE_NAME(handle, mapped_name, direction,
 783                                            mem_ctx, pmapped_name);
 784 }
 785
 786 static NTSTATUS skel_fsctl(struct vfs_handle_struct *handle,
 787                            struct files_struct *fsp,
 788                            TALLOC_CTX *ctx,
 789                            uint32_t function,
 790                            uint16_t req_flags,  /* Needed for UNICODE ... */
 791                            const uint8_t *_in_data,
 792                            uint32_t in_len,
 793                            uint8_t ** _out_data,
 794                            uint32_t max_out_len, uint32_t *out_len)
 795 {
 796         return SMB_VFS_NEXT_FSCTL(handle,
 797                                   fsp,
 798                                   ctx,
 799                                   function,
 800                                   req_flags,
 801                                   _in_data,
 802                                   in_len, _out_data, max_out_len, out_len);
 803 }
 804
 805 static NTSTATUS skel_readdir_attr(struct vfs_handle_struct *handle,
 806                                   const struct smb_filename *fname,
 807                                   TALLOC_CTX *mem_ctx,
 808                                   struct readdir_attr_data **pattr_data)
 809 {
 810         return SMB_VFS_NEXT_READDIR_ATTR(handle, fname, mem_ctx, pattr_data);
 811 }
 812
 813 static NTSTATUS skel_get_dos_attributes(struct vfs_handle_struct *handle,
 814                                 struct smb_filename *smb_fname,
 815                                 uint32_t *dosmode)
 816 {
 817         return SMB_VFS_NEXT_GET_DOS_ATTRIBUTES(handle,
 818                                 smb_fname,
 819                                 dosmode);
 820 }
 821
 822 static NTSTATUS skel_fget_dos_attributes(struct vfs_handle_struct *handle,
 823                                 struct files_struct *fsp,
 824                                 uint32_t *dosmode)
 825 {
 826         return SMB_VFS_NEXT_FGET_DOS_ATTRIBUTES(handle,
 827                                 fsp,
 828                                 dosmode);
 829 }
 830
 831 static NTSTATUS skel_set_dos_attributes(struct vfs_handle_struct *handle,
 832                                 const struct smb_filename *smb_fname,
 833                                 uint32_t dosmode)
 834 {
 835         return SMB_VFS_NEXT_SET_DOS_ATTRIBUTES(handle,
 836                                 smb_fname,
 837                                 dosmode);
 838 }
 839
 840 static NTSTATUS skel_fset_dos_attributes(struct vfs_handle_struct *handle,
 841                                 struct files_struct *fsp,
 842                                 uint32_t dosmode)
 843 {
 844         return SMB_VFS_NEXT_FSET_DOS_ATTRIBUTES(handle,
 845                                 fsp,
 846                                 dosmode);
 847 }
 848
 849 static NTSTATUS skel_fget_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
 850                                  uint32_t security_info,
 851                                  TALLOC_CTX *mem_ctx,
 852                                  struct security_descriptor **ppdesc)
 853 {
 854         return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info, mem_ctx,
 855                                         ppdesc);
 856 }
 857
 858 static NTSTATUS skel_get_nt_acl(vfs_handle_struct *handle,
 859                                 const struct smb_filename *smb_fname,
 860                                 uint32_t security_info,
 861                                 TALLOC_CTX *mem_ctx,
 862                                 struct security_descriptor **ppdesc)
 863 {
 864         return SMB_VFS_NEXT_GET_NT_ACL(handle,
 865                                 smb_fname,
 866                                 security_info,
 867                                 mem_ctx,
 868                                 ppdesc);
 869 }
 870
 871 static NTSTATUS skel_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
 872                                  uint32_t security_info_sent,
 873                                  const struct security_descriptor *psd)
 874 {
 875         return SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
 876 }
 877
 878 static int skel_chmod_acl(vfs_handle_struct *handle,
 879                         const struct smb_filename *smb_fname,
 880                         mode_t mode)
 881 {
 882         return SMB_VFS_NEXT_CHMOD_ACL(handle, smb_fname, mode);
 883 }
 884
 885 static int skel_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp,
 886                            mode_t mode)
 887 {
 888         return SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 889 }
 890
 891 static SMB_ACL_T skel_sys_acl_get_file(vfs_handle_struct *handle,
 892                                        const struct smb_filename *smb_fname,
 893                                        SMB_ACL_TYPE_T type,
 894                                        TALLOC_CTX *mem_ctx)
 895 {
 896         return SMB_VFS_NEXT_SYS_ACL_GET_FILE(handle, smb_fname, type, mem_ctx);
 897 }
 898
 899 static SMB_ACL_T skel_sys_acl_get_fd(vfs_handle_struct *handle,
 900                                      files_struct *fsp, TALLOC_CTX *mem_ctx)
 901 {
 902         return SMB_VFS_NEXT_SYS_ACL_GET_FD(handle, fsp, mem_ctx);
 903 }
 904
 905 static int skel_sys_acl_blob_get_file(vfs_handle_struct *handle,
 906                                 const struct smb_filename *smb_fname,
 907                                 TALLOC_CTX *mem_ctx,
 908                                 char **blob_description,
 909                                 DATA_BLOB *blob)
 910 {
 911         return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FILE(handle, smb_fname, mem_ctx,
 912                                                   blob_description, blob);
 913 }
 914
 915 static int skel_sys_acl_blob_get_fd(vfs_handle_struct *handle,
 916                                     files_struct *fsp, TALLOC_CTX *mem_ctx,
 917                                     char **blob_description, DATA_BLOB *blob)
 918 {
 919         return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FD(handle, fsp, mem_ctx,
 920                                                 blob_description, blob);
 921 }
 922
 923 static int skel_sys_acl_set_file(vfs_handle_struct *handle,
 924                                 const struct smb_filename *smb_fname,
 925                                 SMB_ACL_TYPE_T acltype,
 926                                 SMB_ACL_T theacl)
 927 {
 928         return SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle, smb_fname,
 929                         acltype, theacl);
 930 }
 931
 932 static int skel_sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
 933                                SMB_ACL_T theacl)
 934 {
 935         return SMB_VFS_NEXT_SYS_ACL_SET_FD(handle, fsp, theacl);
 936 }
 937
 938 static int skel_sys_acl_delete_def_file(vfs_handle_struct *handle,
 939                                         const struct smb_filename *smb_fname)
 940 {
 941         return SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FILE(handle, smb_fname);
 942 }
 943
 944 static ssize_t skel_getxattr(vfs_handle_struct *handle,
 945                                 const struct smb_filename *smb_fname,
 946                                 const char *name,
 947                                 void *value,
 948                                 size_t size)
 949 {
 950         return SMB_VFS_NEXT_GETXATTR(handle, smb_fname, name, value, size);
 951 }
 952
 953 static ssize_t skel_fgetxattr(vfs_handle_struct *handle,
 954                               struct files_struct *fsp, const char *name,
 955                               void *value, size_t size)
 956 {
 957         return SMB_VFS_NEXT_FGETXATTR(handle, fsp, name, value, size);
 958 }
 959
 960 static ssize_t skel_listxattr(vfs_handle_struct *handle,
 961                                 const struct smb_filename *smb_fname,
 962                                 char *list,
 963                                 size_t size)
 964 {
 965         return SMB_VFS_NEXT_LISTXATTR(handle, smb_fname, list, size);
 966 }
 967
 968 static ssize_t skel_flistxattr(vfs_handle_struct *handle,
 969                                struct files_struct *fsp, char *list,
 970                                size_t size)
 971 {
 972         return SMB_VFS_NEXT_FLISTXATTR(handle, fsp, list, size);
 973 }
 974
 975 static int skel_removexattr(vfs_handle_struct *handle,
 976                         const struct smb_filename *smb_fname,
 977                         const char *name)
 978 {
 979         return SMB_VFS_NEXT_REMOVEXATTR(handle, smb_fname, name);
 980 }
 981
 982 static int skel_fremovexattr(vfs_handle_struct *handle,
 983                              struct files_struct *fsp, const char *name)
 984 {
 985         return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, name);
 986 }
 987
 988 static int skel_setxattr(vfs_handle_struct *handle,
 989                         const struct smb_filename *smb_fname,
 990                         const char *name,
 991                         const void *value,
 992                         size_t size,
 993                         int flags)
 994 {
 995         return SMB_VFS_NEXT_SETXATTR(handle, smb_fname,
 996                         name, value, size, flags);
 997 }
 998
 999 static int skel_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp,
1000                           const char *name, const void *value, size_t size,
1001                           int flags)
1002 {
1003         return SMB_VFS_NEXT_FSETXATTR(handle, fsp, name, value, size, flags);
1004 }
1005
1006 static bool skel_aio_force(struct vfs_handle_struct *handle,
1007                            struct files_struct *fsp)
1008 {
1009         return SMB_VFS_NEXT_AIO_FORCE(handle, fsp);
1010 }
1011
1012 /* VFS operations structure */
1013
1014 struct vfs_fn_pointers skel_transparent_fns = {
1015         /* Disk operations */
1016
1017         .connect_fn = skel_connect,
1018         .disconnect_fn = skel_disconnect,
1019         .disk_free_fn = skel_disk_free,
1020         .get_quota_fn = skel_get_quota,
1021         .set_quota_fn = skel_set_quota,
1022         .get_shadow_copy_data_fn = skel_get_shadow_copy_data,
1023         .statvfs_fn = skel_statvfs,
1024         .fs_capabilities_fn = skel_fs_capabilities,
1025         .get_dfs_referrals_fn = skel_get_dfs_referrals,
1026         .snap_check_path_fn = skel_snap_check_path,
1027         .snap_create_fn = skel_snap_create,
1028         .snap_delete_fn = skel_snap_delete,
1029
1030         /* Directory operations */
1031
1032         .opendir_fn = skel_opendir,
1033         .fdopendir_fn = skel_fdopendir,
1034         .readdir_fn = skel_readdir,
1035         .seekdir_fn = skel_seekdir,
1036         .telldir_fn = skel_telldir,
1037         .rewind_dir_fn = skel_rewind_dir,
1038         .mkdir_fn = skel_mkdir,
1039         .rmdir_fn = skel_rmdir,
1040         .closedir_fn = skel_closedir,
1041         .init_search_op_fn = skel_init_search_op,
1042
1043         /* File operations */
1044
1045         .open_fn = skel_open,
1046         .create_file_fn = skel_create_file,
1047         .close_fn = skel_close_fn,
1048         .read_fn = skel_vfs_read,
1049         .pread_fn = skel_pread,
1050         .pread_send_fn = skel_pread_send,
1051         .pread_recv_fn = skel_pread_recv,
1052         .write_fn = skel_write,
1053         .pwrite_fn = skel_pwrite,
1054         .pwrite_send_fn = skel_pwrite_send,
1055         .pwrite_recv_fn = skel_pwrite_recv,
1056         .lseek_fn = skel_lseek,
1057         .sendfile_fn = skel_sendfile,
1058         .recvfile_fn = skel_recvfile,
1059         .rename_fn = skel_rename,
1060         .fsync_fn = skel_fsync,
1061         .fsync_send_fn = skel_fsync_send,
1062         .fsync_recv_fn = skel_fsync_recv,
1063         .stat_fn = skel_stat,
1064         .fstat_fn = skel_fstat,
1065         .lstat_fn = skel_lstat,
1066         .get_alloc_size_fn = skel_get_alloc_size,
1067         .unlink_fn = skel_unlink,
1068         .chmod_fn = skel_chmod,
1069         .fchmod_fn = skel_fchmod,
1070         .chown_fn = skel_chown,
1071         .fchown_fn = skel_fchown,
1072         .lchown_fn = skel_lchown,
1073         .chdir_fn = skel_chdir,
1074         .getwd_fn = skel_getwd,
1075         .ntimes_fn = skel_ntimes,
1076         .ftruncate_fn = skel_ftruncate,
1077         .fallocate_fn = skel_fallocate,
1078         .lock_fn = skel_lock,
1079         .kernel_flock_fn = skel_kernel_flock,
1080         .linux_setlease_fn = skel_linux_setlease,
1081         .getlock_fn = skel_getlock,
1082         .symlink_fn = skel_symlink,
1083         .readlink_fn = skel_vfs_readlink,
1084         .link_fn = skel_link,
1085         .mknod_fn = skel_mknod,
1086         .realpath_fn = skel_realpath,
1087         .chflags_fn = skel_chflags,
1088         .file_id_create_fn = skel_file_id_create,
1089         .copy_chunk_send_fn = skel_copy_chunk_send,
1090         .copy_chunk_recv_fn = skel_copy_chunk_recv,
1091         .get_compression_fn = skel_get_compression,
1092         .set_compression_fn = skel_set_compression,
1093
1094         .streaminfo_fn = skel_streaminfo,
1095         .get_real_filename_fn = skel_get_real_filename,
1096         .connectpath_fn = skel_connectpath,
1097         .brl_lock_windows_fn = skel_brl_lock_windows,
1098         .brl_unlock_windows_fn = skel_brl_unlock_windows,
1099         .brl_cancel_windows_fn = skel_brl_cancel_windows,
1100         .strict_lock_fn = skel_strict_lock,
1101         .strict_unlock_fn = skel_strict_unlock,
1102         .translate_name_fn = skel_translate_name,
1103         .fsctl_fn = skel_fsctl,
1104         .readdir_attr_fn = skel_readdir_attr,
1105
1106         /* DOS attributes. */
1107         .get_dos_attributes_fn = skel_get_dos_attributes,
1108         .fget_dos_attributes_fn = skel_fget_dos_attributes,
1109         .set_dos_attributes_fn = skel_set_dos_attributes,
1110         .fset_dos_attributes_fn = skel_fset_dos_attributes,
1111
1112         /* NT ACL operations. */
1113
1114         .fget_nt_acl_fn = skel_fget_nt_acl,
1115         .get_nt_acl_fn = skel_get_nt_acl,
1116         .fset_nt_acl_fn = skel_fset_nt_acl,
1117
1118         /* POSIX ACL operations. */
1119
1120         .chmod_acl_fn = skel_chmod_acl,
1121         .fchmod_acl_fn = skel_fchmod_acl,
1122
1123         .sys_acl_get_file_fn = skel_sys_acl_get_file,
1124         .sys_acl_get_fd_fn = skel_sys_acl_get_fd,
1125         .sys_acl_blob_get_file_fn = skel_sys_acl_blob_get_file,
1126         .sys_acl_blob_get_fd_fn = skel_sys_acl_blob_get_fd,
1127         .sys_acl_set_file_fn = skel_sys_acl_set_file,
1128         .sys_acl_set_fd_fn = skel_sys_acl_set_fd,
1129         .sys_acl_delete_def_file_fn = skel_sys_acl_delete_def_file,
1130
1131         /* EA operations. */
1132         .getxattr_fn = skel_getxattr,
1133         .fgetxattr_fn = skel_fgetxattr,
1134         .listxattr_fn = skel_listxattr,
1135         .flistxattr_fn = skel_flistxattr,
1136         .removexattr_fn = skel_removexattr,
1137         .fremovexattr_fn = skel_fremovexattr,
1138         .setxattr_fn = skel_setxattr,
1139         .fsetxattr_fn = skel_fsetxattr,
1140
1141         /* aio operations */
1142         .aio_force_fn = skel_aio_force,
1143 };
1144
1145 static_decl_vfs;
1146 NTSTATUS vfs_skel_transparent_init(TALLOC_CTX *ctx)
1147 {
1148         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "skel_transparent",
1149                                 &skel_transparent_fns);
1150 }