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,
  85                         const struct smb_filename *smb_fname,
  86                         struct vfs_statvfs_struct *statbuf)
  87 {
  88         return SMB_VFS_NEXT_STATVFS(handle, smb_fname, statbuf);
  89 }
  90
  91 static uint32_t skel_fs_capabilities(struct vfs_handle_struct *handle,
  92                                      enum timestamp_set_resolution *p_ts_res)
  93 {
  94         return SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res);
  95 }
  96
  97 static NTSTATUS skel_get_dfs_referrals(struct vfs_handle_struct *handle,
  98                                        struct dfs_GetDFSReferral *r)
  99 {
 100         return SMB_VFS_NEXT_GET_DFS_REFERRALS(handle, r);
 101 }
 102
 103 static DIR *skel_opendir(vfs_handle_struct *handle,
 104                         const struct smb_filename *smb_fname,
 105                         const char *mask,
 106                         uint32_t attr)
 107 {
 108         return SMB_VFS_NEXT_OPENDIR(handle, smb_fname, mask, attr);
 109 }
 110
 111 static NTSTATUS skel_snap_check_path(struct vfs_handle_struct *handle,
 112                                      TALLOC_CTX *mem_ctx,
 113                                      const char *service_path,
 114                                      char **base_volume)
 115 {
 116         return SMB_VFS_NEXT_SNAP_CHECK_PATH(handle, mem_ctx, service_path,
 117                                             base_volume);
 118 }
 119
 120 static NTSTATUS skel_snap_create(struct vfs_handle_struct *handle,
 121                                  TALLOC_CTX *mem_ctx,
 122                                  const char *base_volume,
 123                                  time_t *tstamp,
 124                                  bool rw,
 125                                  char **base_path,
 126                                  char **snap_path)
 127 {
 128         return SMB_VFS_NEXT_SNAP_CREATE(handle, mem_ctx, base_volume, tstamp,
 129                                         rw, base_path, snap_path);
 130 }
 131
 132 static NTSTATUS skel_snap_delete(struct vfs_handle_struct *handle,
 133                                  TALLOC_CTX *mem_ctx,
 134                                  char *base_path,
 135                                  char *snap_path)
 136 {
 137         return SMB_VFS_NEXT_SNAP_DELETE(handle, mem_ctx, base_path, snap_path);
 138 }
 139
 140 static DIR *skel_fdopendir(vfs_handle_struct *handle, files_struct *fsp,
 141                            const char *mask, uint32_t attr)
 142 {
 143         return SMB_VFS_NEXT_FDOPENDIR(handle, fsp, mask, attr);
 144 }
 145
 146 static struct dirent *skel_readdir(vfs_handle_struct *handle,
 147                                    DIR *dirp, SMB_STRUCT_STAT *sbuf)
 148 {
 149         return SMB_VFS_NEXT_READDIR(handle, dirp, sbuf);
 150 }
 151
 152 static void skel_seekdir(vfs_handle_struct *handle, DIR *dirp, long offset)
 153 {
 154         SMB_VFS_NEXT_SEEKDIR(handle, dirp, offset);
 155 }
 156
 157 static long skel_telldir(vfs_handle_struct *handle, DIR *dirp)
 158 {
 159         return SMB_VFS_NEXT_TELLDIR(handle, dirp);
 160 }
 161
 162 static void skel_rewind_dir(vfs_handle_struct *handle, DIR *dirp)
 163 {
 164         SMB_VFS_NEXT_REWINDDIR(handle, dirp);
 165 }
 166
 167 static int skel_mkdir(vfs_handle_struct *handle,
 168                 const struct smb_filename *smb_fname,
 169                 mode_t mode)
 170 {
 171         return SMB_VFS_NEXT_MKDIR(handle, smb_fname, mode);
 172 }
 173
 174 static int skel_rmdir(vfs_handle_struct *handle,
 175                 const struct smb_filename *smb_fname)
 176 {
 177         return SMB_VFS_NEXT_RMDIR(handle, smb_fname);
 178 }
 179
 180 static int skel_closedir(vfs_handle_struct *handle, DIR *dir)
 181 {
 182         return SMB_VFS_NEXT_CLOSEDIR(handle, dir);
 183 }
 184
 185 static void skel_init_search_op(struct vfs_handle_struct *handle, DIR *dirp)
 186 {
 187         SMB_VFS_NEXT_INIT_SEARCH_OP(handle, dirp);
 188 }
 189
 190 static int skel_open(vfs_handle_struct *handle, struct smb_filename *smb_fname,
 191                      files_struct *fsp, int flags, mode_t mode)
 192 {
 193         return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 194 }
 195
 196 static NTSTATUS skel_create_file(struct vfs_handle_struct *handle,
 197                                  struct smb_request *req,
 198                                  uint16_t root_dir_fid,
 199                                  struct smb_filename *smb_fname,
 200                                  uint32_t access_mask,
 201                                  uint32_t share_access,
 202                                  uint32_t create_disposition,
 203                                  uint32_t create_options,
 204                                  uint32_t file_attributes,
 205                                  uint32_t oplock_request,
 206                                  struct smb2_lease *lease,
 207                                  uint64_t allocation_size,
 208                                  uint32_t private_flags,
 209                                  struct security_descriptor *sd,
 210                                  struct ea_list *ea_list,
 211                                  files_struct ** result, int *pinfo,
 212                                  const struct smb2_create_blobs *in_context_blobs,
 213                                  struct smb2_create_blobs *out_context_blobs)
 214 {
 215         return SMB_VFS_NEXT_CREATE_FILE(handle,
 216                                         req,
 217                                         root_dir_fid,
 218                                         smb_fname,
 219                                         access_mask,
 220                                         share_access,
 221                                         create_disposition,
 222                                         create_options,
 223                                         file_attributes,
 224                                         oplock_request,
 225                                         lease,
 226                                         allocation_size,
 227                                         private_flags,
 228                                         sd, ea_list, result, pinfo,
 229                                         in_context_blobs, out_context_blobs);
 230 }
 231
 232 static int skel_close_fn(vfs_handle_struct *handle, files_struct *fsp)
 233 {
 234         return SMB_VFS_NEXT_CLOSE(handle, fsp);
 235 }
 236
 237 static ssize_t skel_vfs_read(vfs_handle_struct *handle, files_struct *fsp,
 238                              void *data, size_t n)
 239 {
 240         return SMB_VFS_NEXT_READ(handle, fsp, data, n);
 241 }
 242
 243 static ssize_t skel_pread(vfs_handle_struct *handle, files_struct *fsp,
 244                           void *data, size_t n, off_t offset)
 245 {
 246         return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
 247 }
 248
 249 struct skel_pread_state {
 250         ssize_t ret;
 251         struct vfs_aio_state vfs_aio_state;
 252 };
 253
 254 static void skel_pread_done(struct tevent_req *subreq);
 255
 256 static struct tevent_req *skel_pread_send(struct vfs_handle_struct *handle,
 257                                           TALLOC_CTX *mem_ctx,
 258                                           struct tevent_context *ev,
 259                                           struct files_struct *fsp,
 260                                           void *data, size_t n, off_t offset)
 261 {
 262         struct tevent_req *req, *subreq;
 263         struct skel_pread_state *state;
 264
 265         req = tevent_req_create(mem_ctx, &state, struct skel_pread_state);
 266         if (req == NULL) {
 267                 return NULL;
 268         }
 269         subreq = SMB_VFS_NEXT_PREAD_SEND(state, ev, handle, fsp, data,
 270                                          n, offset);
 271         if (tevent_req_nomem(subreq, req)) {
 272                 return tevent_req_post(req, ev);
 273         }
 274         tevent_req_set_callback(subreq, skel_pread_done, req);
 275         return req;
 276 }
 277
 278 static void skel_pread_done(struct tevent_req *subreq)
 279 {
 280         struct tevent_req *req =
 281             tevent_req_callback_data(subreq, struct tevent_req);
 282         struct skel_pread_state *state =
 283             tevent_req_data(req, struct skel_pread_state);
 284
 285         state->ret = SMB_VFS_PREAD_RECV(subreq, &state->vfs_aio_state);
 286         TALLOC_FREE(subreq);
 287         tevent_req_done(req);
 288 }
 289
 290 static ssize_t skel_pread_recv(struct tevent_req *req,
 291                                struct vfs_aio_state *vfs_aio_state)
 292 {
 293         struct skel_pread_state *state =
 294             tevent_req_data(req, struct skel_pread_state);
 295
 296         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 297                 return -1;
 298         }
 299         *vfs_aio_state = state->vfs_aio_state;
 300         return state->ret;
 301 }
 302
 303 static ssize_t skel_write(vfs_handle_struct *handle, files_struct *fsp,
 304                           const void *data, size_t n)
 305 {
 306         return SMB_VFS_NEXT_WRITE(handle, fsp, data, n);
 307 }
 308
 309 static ssize_t skel_pwrite(vfs_handle_struct *handle, files_struct *fsp,
 310                            const void *data, size_t n, off_t offset)
 311 {
 312         return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 313 }
 314
 315 struct skel_pwrite_state {
 316         ssize_t ret;
 317         struct vfs_aio_state vfs_aio_state;
 318 };
 319
 320 static void skel_pwrite_done(struct tevent_req *subreq);
 321
 322 static struct tevent_req *skel_pwrite_send(struct vfs_handle_struct *handle,
 323                                            TALLOC_CTX *mem_ctx,
 324                                            struct tevent_context *ev,
 325                                            struct files_struct *fsp,
 326                                            const void *data,
 327                                            size_t n, off_t offset)
 328 {
 329         struct tevent_req *req, *subreq;
 330         struct skel_pwrite_state *state;
 331
 332         req = tevent_req_create(mem_ctx, &state, struct skel_pwrite_state);
 333         if (req == NULL) {
 334                 return NULL;
 335         }
 336         subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp, data,
 337                                           n, offset);
 338         if (tevent_req_nomem(subreq, req)) {
 339                 return tevent_req_post(req, ev);
 340         }
 341         tevent_req_set_callback(subreq, skel_pwrite_done, req);
 342         return req;
 343 }
 344
 345 static void skel_pwrite_done(struct tevent_req *subreq)
 346 {
 347         struct tevent_req *req =
 348             tevent_req_callback_data(subreq, struct tevent_req);
 349         struct skel_pwrite_state *state =
 350             tevent_req_data(req, struct skel_pwrite_state);
 351
 352         state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
 353         TALLOC_FREE(subreq);
 354         tevent_req_done(req);
 355 }
 356
 357 static ssize_t skel_pwrite_recv(struct tevent_req *req,
 358                                 struct vfs_aio_state *vfs_aio_state)
 359 {
 360         struct skel_pwrite_state *state =
 361             tevent_req_data(req, struct skel_pwrite_state);
 362
 363         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 364                 return -1;
 365         }
 366         *vfs_aio_state = state->vfs_aio_state;
 367         return state->ret;
 368 }
 369
 370 static off_t skel_lseek(vfs_handle_struct *handle, files_struct *fsp,
 371                         off_t offset, int whence)
 372 {
 373         return SMB_VFS_NEXT_LSEEK(handle, fsp, offset, whence);
 374 }
 375
 376 static ssize_t skel_sendfile(vfs_handle_struct *handle, int tofd,
 377                              files_struct *fromfsp, const DATA_BLOB *hdr,
 378                              off_t offset, size_t n)
 379 {
 380         return SMB_VFS_NEXT_SENDFILE(handle, tofd, fromfsp, hdr, offset, n);
 381 }
 382
 383 static ssize_t skel_recvfile(vfs_handle_struct *handle, int fromfd,
 384                              files_struct *tofsp, off_t offset, size_t n)
 385 {
 386         return SMB_VFS_NEXT_RECVFILE(handle, fromfd, tofsp, offset, n);
 387 }
 388
 389 static int skel_rename(vfs_handle_struct *handle,
 390                        const struct smb_filename *smb_fname_src,
 391                        const struct smb_filename *smb_fname_dst)
 392 {
 393         return SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 394 }
 395
 396 static int skel_fsync(vfs_handle_struct *handle, files_struct *fsp)
 397 {
 398         return SMB_VFS_NEXT_FSYNC(handle, fsp);
 399 }
 400
 401 struct skel_fsync_state {
 402         int ret;
 403         struct vfs_aio_state vfs_aio_state;
 404 };
 405
 406 static void skel_fsync_done(struct tevent_req *subreq);
 407
 408 static struct tevent_req *skel_fsync_send(struct vfs_handle_struct *handle,
 409                                           TALLOC_CTX *mem_ctx,
 410                                           struct tevent_context *ev,
 411                                           struct files_struct *fsp)
 412 {
 413         struct tevent_req *req, *subreq;
 414         struct skel_fsync_state *state;
 415
 416         req = tevent_req_create(mem_ctx, &state, struct skel_fsync_state);
 417         if (req == NULL) {
 418                 return NULL;
 419         }
 420         subreq = SMB_VFS_NEXT_FSYNC_SEND(state, ev, handle, fsp);
 421         if (tevent_req_nomem(subreq, req)) {
 422                 return tevent_req_post(req, ev);
 423         }
 424         tevent_req_set_callback(subreq, skel_fsync_done, req);
 425         return req;
 426 }
 427
 428 static void skel_fsync_done(struct tevent_req *subreq)
 429 {
 430         struct tevent_req *req =
 431             tevent_req_callback_data(subreq, struct tevent_req);
 432         struct skel_fsync_state *state =
 433             tevent_req_data(req, struct skel_fsync_state);
 434
 435         state->ret = SMB_VFS_FSYNC_RECV(subreq, &state->vfs_aio_state);
 436         TALLOC_FREE(subreq);
 437         tevent_req_done(req);
 438 }
 439
 440 static int skel_fsync_recv(struct tevent_req *req,
 441                            struct vfs_aio_state *vfs_aio_state)
 442 {
 443         struct skel_fsync_state *state =
 444             tevent_req_data(req, struct skel_fsync_state);
 445
 446         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 447                 return -1;
 448         }
 449         *vfs_aio_state = state->vfs_aio_state;
 450         return state->ret;
 451 }
 452
 453 static int skel_stat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
 454 {
 455         return SMB_VFS_NEXT_STAT(handle, smb_fname);
 456 }
 457
 458 static int skel_fstat(vfs_handle_struct *handle, files_struct *fsp,
 459                       SMB_STRUCT_STAT *sbuf)
 460 {
 461         return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
 462 }
 463
 464 static int skel_lstat(vfs_handle_struct *handle,
 465                       struct smb_filename *smb_fname)
 466 {
 467         return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
 468 }
 469
 470 static uint64_t skel_get_alloc_size(struct vfs_handle_struct *handle,
 471                                     struct files_struct *fsp,
 472                                     const SMB_STRUCT_STAT *sbuf)
 473 {
 474         return SMB_VFS_NEXT_GET_ALLOC_SIZE(handle, fsp, sbuf);
 475 }
 476
 477 static int skel_unlink(vfs_handle_struct *handle,
 478                        const struct smb_filename *smb_fname)
 479 {
 480         return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 481 }
 482
 483 static int skel_chmod(vfs_handle_struct *handle,
 484                         const struct smb_filename *smb_fname,
 485                         mode_t mode)
 486 {
 487         return SMB_VFS_NEXT_CHMOD(handle, smb_fname, mode);
 488 }
 489
 490 static int skel_fchmod(vfs_handle_struct *handle, files_struct *fsp,
 491                        mode_t mode)
 492 {
 493         return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 494 }
 495
 496 static int skel_chown(vfs_handle_struct *handle,
 497                         const struct smb_filename *smb_fname,
 498                         uid_t uid,
 499                         gid_t gid)
 500 {
 501         return SMB_VFS_NEXT_CHOWN(handle, smb_fname, uid, gid);
 502 }
 503
 504 static int skel_fchown(vfs_handle_struct *handle, files_struct *fsp,
 505                        uid_t uid, gid_t gid)
 506 {
 507         return SMB_VFS_NEXT_FCHOWN(handle, fsp, uid, gid);
 508 }
 509
 510 static int skel_lchown(vfs_handle_struct *handle,
 511                         const struct smb_filename *smb_fname,
 512                         uid_t uid,
 513                         gid_t gid)
 514 {
 515         return SMB_VFS_NEXT_LCHOWN(handle, smb_fname, uid, gid);
 516 }
 517
 518 static int skel_chdir(vfs_handle_struct *handle,
 519                         const struct smb_filename *smb_fname)
 520 {
 521         return SMB_VFS_NEXT_CHDIR(handle, smb_fname);
 522 }
 523
 524 static struct smb_filename *skel_getwd(vfs_handle_struct *handle,
 525                                         TALLOC_CTX *ctx)
 526 {
 527         return SMB_VFS_NEXT_GETWD(handle, ctx);
 528 }
 529
 530 static int skel_ntimes(vfs_handle_struct *handle,
 531                        const struct smb_filename *smb_fname,
 532                        struct smb_file_time *ft)
 533 {
 534         return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft);
 535 }
 536
 537 static int skel_ftruncate(vfs_handle_struct *handle, files_struct *fsp,
 538                           off_t offset)
 539 {
 540         return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
 541 }
 542
 543 static int skel_fallocate(vfs_handle_struct *handle, files_struct *fsp,
 544                           uint32_t mode, off_t offset, off_t len)
 545 {
 546         return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
 547 }
 548
 549 static bool skel_lock(vfs_handle_struct *handle, files_struct *fsp, int op,
 550                       off_t offset, off_t count, int type)
 551 {
 552         return SMB_VFS_NEXT_LOCK(handle, fsp, op, offset, count, type);
 553 }
 554
 555 static int skel_kernel_flock(struct vfs_handle_struct *handle,
 556                              struct files_struct *fsp, uint32_t share_mode,
 557                              uint32_t access_mask)
 558 {
 559         return SMB_VFS_NEXT_KERNEL_FLOCK(handle, fsp, share_mode, access_mask);
 560 }
 561
 562 static int skel_linux_setlease(struct vfs_handle_struct *handle,
 563                                struct files_struct *fsp, int leasetype)
 564 {
 565         return SMB_VFS_NEXT_LINUX_SETLEASE(handle, fsp, leasetype);
 566 }
 567
 568 static bool skel_getlock(vfs_handle_struct *handle, files_struct *fsp,
 569                          off_t *poffset, off_t *pcount, int *ptype,
 570                          pid_t *ppid)
 571 {
 572         return SMB_VFS_NEXT_GETLOCK(handle, fsp, poffset, pcount, ptype, ppid);
 573 }
 574
 575 static int skel_symlink(vfs_handle_struct *handle,
 576                         const char *link_contents,
 577                         const struct smb_filename *new_smb_fname)
 578 {
 579         return SMB_VFS_NEXT_SYMLINK(handle, link_contents, new_smb_fname);
 580 }
 581
 582 static int skel_vfs_readlink(vfs_handle_struct *handle,
 583                         const struct smb_filename *smb_fname,
 584                         char *buf,
 585                         size_t bufsiz)
 586 {
 587         return SMB_VFS_NEXT_READLINK(handle, smb_fname, buf, bufsiz);
 588 }
 589
 590 static int skel_link(vfs_handle_struct *handle,
 591                         const struct smb_filename *old_smb_fname,
 592                         const struct smb_filename *new_smb_fname)
 593 {
 594         return SMB_VFS_NEXT_LINK(handle, old_smb_fname, new_smb_fname);
 595 }
 596
 597 static int skel_mknod(vfs_handle_struct *handle,
 598                         const struct smb_filename *smb_fname,
 599                         mode_t mode,
 600                         SMB_DEV_T dev)
 601 {
 602         return SMB_VFS_NEXT_MKNOD(handle, smb_fname, mode, dev);
 603 }
 604
 605 static struct smb_filename *skel_realpath(vfs_handle_struct *handle,
 606                         TALLOC_CTX *ctx,
 607                         const struct smb_filename *smb_fname)
 608 {
 609         return SMB_VFS_NEXT_REALPATH(handle, ctx, smb_fname);
 610 }
 611
 612 static int skel_chflags(vfs_handle_struct *handle,
 613                         const struct smb_filename *smb_fname,
 614                         uint flags)
 615 {
 616         return SMB_VFS_NEXT_CHFLAGS(handle, smb_fname, flags);
 617 }
 618
 619 static struct file_id skel_file_id_create(vfs_handle_struct *handle,
 620                                           const SMB_STRUCT_STAT *sbuf)
 621 {
 622         return SMB_VFS_NEXT_FILE_ID_CREATE(handle, sbuf);
 623 }
 624
 625 struct skel_cc_state {
 626         struct vfs_handle_struct *handle;
 627         off_t copied;
 628 };
 629 static void skel_copy_chunk_done(struct tevent_req *subreq);
 630
 631 static struct tevent_req *skel_copy_chunk_send(struct vfs_handle_struct *handle,
 632                                                TALLOC_CTX *mem_ctx,
 633                                                struct tevent_context *ev,
 634                                                struct files_struct *src_fsp,
 635                                                off_t src_off,
 636                                                struct files_struct *dest_fsp,
 637                                                off_t dest_off,
 638                                                off_t num,
 639                                                uint32_t flags)
 640 {
 641         struct tevent_req *req;
 642         struct tevent_req *subreq;
 643         struct skel_cc_state *cc_state;
 644
 645         req = tevent_req_create(mem_ctx, &cc_state, struct skel_cc_state);
 646         if (req == NULL) {
 647                 return NULL;
 648         }
 649
 650         cc_state->handle = handle;
 651         subreq = SMB_VFS_NEXT_COPY_CHUNK_SEND(handle, cc_state, ev,
 652                                               src_fsp, src_off,
 653                                               dest_fsp, dest_off, num, flags);
 654         if (tevent_req_nomem(subreq, req)) {
 655                 return tevent_req_post(req, ev);
 656         }
 657
 658         tevent_req_set_callback(subreq, skel_copy_chunk_done, req);
 659         return req;
 660 }
 661
 662 static void skel_copy_chunk_done(struct tevent_req *subreq)
 663 {
 664         struct tevent_req *req = tevent_req_callback_data(
 665                 subreq, struct tevent_req);
 666         struct skel_cc_state *cc_state
 667                         = tevent_req_data(req, struct skel_cc_state);
 668         NTSTATUS status;
 669
 670         status = SMB_VFS_NEXT_COPY_CHUNK_RECV(cc_state->handle,
 671                                               subreq,
 672                                               &cc_state->copied);
 673         TALLOC_FREE(subreq);
 674         if (tevent_req_nterror(req, status)) {
 675                 return;
 676         }
 677         tevent_req_done(req);
 678 }
 679
 680 static NTSTATUS skel_copy_chunk_recv(struct vfs_handle_struct *handle,
 681                                      struct tevent_req *req,
 682                                      off_t *copied)
 683 {
 684         struct skel_cc_state *cc_state
 685                         = tevent_req_data(req, struct skel_cc_state);
 686         NTSTATUS status;
 687
 688         *copied = cc_state->copied;
 689         if (tevent_req_is_nterror(req, &status)) {
 690                 tevent_req_received(req);
 691                 return status;
 692         }
 693
 694         tevent_req_received(req);
 695         return NT_STATUS_OK;
 696 }
 697
 698 static NTSTATUS skel_get_compression(struct vfs_handle_struct *handle,
 699                                      TALLOC_CTX *mem_ctx,
 700                                      struct files_struct *fsp,
 701                                      struct smb_filename *smb_fname,
 702                                      uint16_t *_compression_fmt)
 703 {
 704         return SMB_VFS_NEXT_GET_COMPRESSION(handle, mem_ctx, fsp, smb_fname,
 705                                             _compression_fmt);
 706 }
 707
 708 static NTSTATUS skel_set_compression(struct vfs_handle_struct *handle,
 709                                      TALLOC_CTX *mem_ctx,
 710                                      struct files_struct *fsp,
 711                                      uint16_t compression_fmt)
 712 {
 713         return SMB_VFS_NEXT_SET_COMPRESSION(handle, mem_ctx, fsp,
 714                                             compression_fmt);
 715 }
 716
 717 static NTSTATUS skel_streaminfo(struct vfs_handle_struct *handle,
 718                                 struct files_struct *fsp,
 719                                 const struct smb_filename *smb_fname,
 720                                 TALLOC_CTX *mem_ctx,
 721                                 unsigned int *num_streams,
 722                                 struct stream_struct **streams)
 723 {
 724         return SMB_VFS_NEXT_STREAMINFO(handle,
 725                                 fsp,
 726                                 smb_fname,
 727                                 mem_ctx,
 728                                 num_streams,
 729                                 streams);
 730 }
 731
 732 static int skel_get_real_filename(struct vfs_handle_struct *handle,
 733                                   const char *path,
 734                                   const char *name,
 735                                   TALLOC_CTX *mem_ctx, char **found_name)
 736 {
 737         return SMB_VFS_NEXT_GET_REAL_FILENAME(handle,
 738                                               path, name, mem_ctx, found_name);
 739 }
 740
 741 static const char *skel_connectpath(struct vfs_handle_struct *handle,
 742                                     const char *filename)
 743 {
 744         return SMB_VFS_NEXT_CONNECTPATH(handle, filename);
 745 }
 746
 747 static NTSTATUS skel_brl_lock_windows(struct vfs_handle_struct *handle,
 748                                       struct byte_range_lock *br_lck,
 749                                       struct lock_struct *plock,
 750                                       bool blocking_lock)
 751 {
 752         return SMB_VFS_NEXT_BRL_LOCK_WINDOWS(handle,
 753                                              br_lck, plock, blocking_lock);
 754 }
 755
 756 static bool skel_brl_unlock_windows(struct vfs_handle_struct *handle,
 757                                     struct messaging_context *msg_ctx,
 758                                     struct byte_range_lock *br_lck,
 759                                     const struct lock_struct *plock)
 760 {
 761         return SMB_VFS_NEXT_BRL_UNLOCK_WINDOWS(handle, msg_ctx, br_lck, plock);
 762 }
 763
 764 static bool skel_brl_cancel_windows(struct vfs_handle_struct *handle,
 765                                     struct byte_range_lock *br_lck,
 766                                     struct lock_struct *plock)
 767 {
 768         return SMB_VFS_NEXT_BRL_CANCEL_WINDOWS(handle, br_lck, plock);
 769 }
 770
 771 static bool skel_strict_lock(struct vfs_handle_struct *handle,
 772                              struct files_struct *fsp,
 773                              struct lock_struct *plock)
 774 {
 775         return SMB_VFS_NEXT_STRICT_LOCK(handle, fsp, plock);
 776 }
 777
 778 static void skel_strict_unlock(struct vfs_handle_struct *handle,
 779                                struct files_struct *fsp,
 780                                struct lock_struct *plock)
 781 {
 782         SMB_VFS_NEXT_STRICT_UNLOCK(handle, fsp, plock);
 783 }
 784
 785 static NTSTATUS skel_translate_name(struct vfs_handle_struct *handle,
 786                                     const char *mapped_name,
 787                                     enum vfs_translate_direction direction,
 788                                     TALLOC_CTX *mem_ctx, char **pmapped_name)
 789 {
 790         return SMB_VFS_NEXT_TRANSLATE_NAME(handle, mapped_name, direction,
 791                                            mem_ctx, pmapped_name);
 792 }
 793
 794 static NTSTATUS skel_fsctl(struct vfs_handle_struct *handle,
 795                            struct files_struct *fsp,
 796                            TALLOC_CTX *ctx,
 797                            uint32_t function,
 798                            uint16_t req_flags,  /* Needed for UNICODE ... */
 799                            const uint8_t *_in_data,
 800                            uint32_t in_len,
 801                            uint8_t ** _out_data,
 802                            uint32_t max_out_len, uint32_t *out_len)
 803 {
 804         return SMB_VFS_NEXT_FSCTL(handle,
 805                                   fsp,
 806                                   ctx,
 807                                   function,
 808                                   req_flags,
 809                                   _in_data,
 810                                   in_len, _out_data, max_out_len, out_len);
 811 }
 812
 813 static NTSTATUS skel_readdir_attr(struct vfs_handle_struct *handle,
 814                                   const struct smb_filename *fname,
 815                                   TALLOC_CTX *mem_ctx,
 816                                   struct readdir_attr_data **pattr_data)
 817 {
 818         return SMB_VFS_NEXT_READDIR_ATTR(handle, fname, mem_ctx, pattr_data);
 819 }
 820
 821 static NTSTATUS skel_get_dos_attributes(struct vfs_handle_struct *handle,
 822                                 struct smb_filename *smb_fname,
 823                                 uint32_t *dosmode)
 824 {
 825         return SMB_VFS_NEXT_GET_DOS_ATTRIBUTES(handle,
 826                                 smb_fname,
 827                                 dosmode);
 828 }
 829
 830 static NTSTATUS skel_fget_dos_attributes(struct vfs_handle_struct *handle,
 831                                 struct files_struct *fsp,
 832                                 uint32_t *dosmode)
 833 {
 834         return SMB_VFS_NEXT_FGET_DOS_ATTRIBUTES(handle,
 835                                 fsp,
 836                                 dosmode);
 837 }
 838
 839 static NTSTATUS skel_set_dos_attributes(struct vfs_handle_struct *handle,
 840                                 const struct smb_filename *smb_fname,
 841                                 uint32_t dosmode)
 842 {
 843         return SMB_VFS_NEXT_SET_DOS_ATTRIBUTES(handle,
 844                                 smb_fname,
 845                                 dosmode);
 846 }
 847
 848 static NTSTATUS skel_fset_dos_attributes(struct vfs_handle_struct *handle,
 849                                 struct files_struct *fsp,
 850                                 uint32_t dosmode)
 851 {
 852         return SMB_VFS_NEXT_FSET_DOS_ATTRIBUTES(handle,
 853                                 fsp,
 854                                 dosmode);
 855 }
 856
 857 static NTSTATUS skel_fget_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
 858                                  uint32_t security_info,
 859                                  TALLOC_CTX *mem_ctx,
 860                                  struct security_descriptor **ppdesc)
 861 {
 862         return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info, mem_ctx,
 863                                         ppdesc);
 864 }
 865
 866 static NTSTATUS skel_get_nt_acl(vfs_handle_struct *handle,
 867                                 const struct smb_filename *smb_fname,
 868                                 uint32_t security_info,
 869                                 TALLOC_CTX *mem_ctx,
 870                                 struct security_descriptor **ppdesc)
 871 {
 872         return SMB_VFS_NEXT_GET_NT_ACL(handle,
 873                                 smb_fname,
 874                                 security_info,
 875                                 mem_ctx,
 876                                 ppdesc);
 877 }
 878
 879 static NTSTATUS skel_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
 880                                  uint32_t security_info_sent,
 881                                  const struct security_descriptor *psd)
 882 {
 883         return SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
 884 }
 885
 886 static int skel_chmod_acl(vfs_handle_struct *handle,
 887                         const struct smb_filename *smb_fname,
 888                         mode_t mode)
 889 {
 890         return SMB_VFS_NEXT_CHMOD_ACL(handle, smb_fname, mode);
 891 }
 892
 893 static int skel_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp,
 894                            mode_t mode)
 895 {
 896         return SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 897 }
 898
 899 static SMB_ACL_T skel_sys_acl_get_file(vfs_handle_struct *handle,
 900                                        const struct smb_filename *smb_fname,
 901                                        SMB_ACL_TYPE_T type,
 902                                        TALLOC_CTX *mem_ctx)
 903 {
 904         return SMB_VFS_NEXT_SYS_ACL_GET_FILE(handle, smb_fname, type, mem_ctx);
 905 }
 906
 907 static SMB_ACL_T skel_sys_acl_get_fd(vfs_handle_struct *handle,
 908                                      files_struct *fsp, TALLOC_CTX *mem_ctx)
 909 {
 910         return SMB_VFS_NEXT_SYS_ACL_GET_FD(handle, fsp, mem_ctx);
 911 }
 912
 913 static int skel_sys_acl_blob_get_file(vfs_handle_struct *handle,
 914                                 const struct smb_filename *smb_fname,
 915                                 TALLOC_CTX *mem_ctx,
 916                                 char **blob_description,
 917                                 DATA_BLOB *blob)
 918 {
 919         return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FILE(handle, smb_fname, mem_ctx,
 920                                                   blob_description, blob);
 921 }
 922
 923 static int skel_sys_acl_blob_get_fd(vfs_handle_struct *handle,
 924                                     files_struct *fsp, TALLOC_CTX *mem_ctx,
 925                                     char **blob_description, DATA_BLOB *blob)
 926 {
 927         return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FD(handle, fsp, mem_ctx,
 928                                                 blob_description, blob);
 929 }
 930
 931 static int skel_sys_acl_set_file(vfs_handle_struct *handle,
 932                                 const struct smb_filename *smb_fname,
 933                                 SMB_ACL_TYPE_T acltype,
 934                                 SMB_ACL_T theacl)
 935 {
 936         return SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle, smb_fname,
 937                         acltype, theacl);
 938 }
 939
 940 static int skel_sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
 941                                SMB_ACL_T theacl)
 942 {
 943         return SMB_VFS_NEXT_SYS_ACL_SET_FD(handle, fsp, theacl);
 944 }
 945
 946 static int skel_sys_acl_delete_def_file(vfs_handle_struct *handle,
 947                                         const struct smb_filename *smb_fname)
 948 {
 949         return SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FILE(handle, smb_fname);
 950 }
 951
 952 static ssize_t skel_getxattr(vfs_handle_struct *handle,
 953                                 const struct smb_filename *smb_fname,
 954                                 const char *name,
 955                                 void *value,
 956                                 size_t size)
 957 {
 958         return SMB_VFS_NEXT_GETXATTR(handle, smb_fname, name, value, size);
 959 }
 960
 961 static ssize_t skel_fgetxattr(vfs_handle_struct *handle,
 962                               struct files_struct *fsp, const char *name,
 963                               void *value, size_t size)
 964 {
 965         return SMB_VFS_NEXT_FGETXATTR(handle, fsp, name, value, size);
 966 }
 967
 968 static ssize_t skel_listxattr(vfs_handle_struct *handle,
 969                                 const struct smb_filename *smb_fname,
 970                                 char *list,
 971                                 size_t size)
 972 {
 973         return SMB_VFS_NEXT_LISTXATTR(handle, smb_fname, list, size);
 974 }
 975
 976 static ssize_t skel_flistxattr(vfs_handle_struct *handle,
 977                                struct files_struct *fsp, char *list,
 978                                size_t size)
 979 {
 980         return SMB_VFS_NEXT_FLISTXATTR(handle, fsp, list, size);
 981 }
 982
 983 static int skel_removexattr(vfs_handle_struct *handle,
 984                         const struct smb_filename *smb_fname,
 985                         const char *name)
 986 {
 987         return SMB_VFS_NEXT_REMOVEXATTR(handle, smb_fname, name);
 988 }
 989
 990 static int skel_fremovexattr(vfs_handle_struct *handle,
 991                              struct files_struct *fsp, const char *name)
 992 {
 993         return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, name);
 994 }
 995
 996 static int skel_setxattr(vfs_handle_struct *handle,
 997                         const struct smb_filename *smb_fname,
 998                         const char *name,
 999                         const void *value,
1000                         size_t size,
1001                         int flags)
1002 {
1003         return SMB_VFS_NEXT_SETXATTR(handle, smb_fname,
1004                         name, value, size, flags);
1005 }
1006
1007 static int skel_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp,
1008                           const char *name, const void *value, size_t size,
1009                           int flags)
1010 {
1011         return SMB_VFS_NEXT_FSETXATTR(handle, fsp, name, value, size, flags);
1012 }
1013
1014 static bool skel_aio_force(struct vfs_handle_struct *handle,
1015                            struct files_struct *fsp)
1016 {
1017         return SMB_VFS_NEXT_AIO_FORCE(handle, fsp);
1018 }
1019
1020 /* VFS operations structure */
1021
1022 struct vfs_fn_pointers skel_transparent_fns = {
1023         /* Disk operations */
1024
1025         .connect_fn = skel_connect,
1026         .disconnect_fn = skel_disconnect,
1027         .disk_free_fn = skel_disk_free,
1028         .get_quota_fn = skel_get_quota,
1029         .set_quota_fn = skel_set_quota,
1030         .get_shadow_copy_data_fn = skel_get_shadow_copy_data,
1031         .statvfs_fn = skel_statvfs,
1032         .fs_capabilities_fn = skel_fs_capabilities,
1033         .get_dfs_referrals_fn = skel_get_dfs_referrals,
1034         .snap_check_path_fn = skel_snap_check_path,
1035         .snap_create_fn = skel_snap_create,
1036         .snap_delete_fn = skel_snap_delete,
1037
1038         /* Directory operations */
1039
1040         .opendir_fn = skel_opendir,
1041         .fdopendir_fn = skel_fdopendir,
1042         .readdir_fn = skel_readdir,
1043         .seekdir_fn = skel_seekdir,
1044         .telldir_fn = skel_telldir,
1045         .rewind_dir_fn = skel_rewind_dir,
1046         .mkdir_fn = skel_mkdir,
1047         .rmdir_fn = skel_rmdir,
1048         .closedir_fn = skel_closedir,
1049         .init_search_op_fn = skel_init_search_op,
1050
1051         /* File operations */
1052
1053         .open_fn = skel_open,
1054         .create_file_fn = skel_create_file,
1055         .close_fn = skel_close_fn,
1056         .read_fn = skel_vfs_read,
1057         .pread_fn = skel_pread,
1058         .pread_send_fn = skel_pread_send,
1059         .pread_recv_fn = skel_pread_recv,
1060         .write_fn = skel_write,
1061         .pwrite_fn = skel_pwrite,
1062         .pwrite_send_fn = skel_pwrite_send,
1063         .pwrite_recv_fn = skel_pwrite_recv,
1064         .lseek_fn = skel_lseek,
1065         .sendfile_fn = skel_sendfile,
1066         .recvfile_fn = skel_recvfile,
1067         .rename_fn = skel_rename,
1068         .fsync_fn = skel_fsync,
1069         .fsync_send_fn = skel_fsync_send,
1070         .fsync_recv_fn = skel_fsync_recv,
1071         .stat_fn = skel_stat,
1072         .fstat_fn = skel_fstat,
1073         .lstat_fn = skel_lstat,
1074         .get_alloc_size_fn = skel_get_alloc_size,
1075         .unlink_fn = skel_unlink,
1076         .chmod_fn = skel_chmod,
1077         .fchmod_fn = skel_fchmod,
1078         .chown_fn = skel_chown,
1079         .fchown_fn = skel_fchown,
1080         .lchown_fn = skel_lchown,
1081         .chdir_fn = skel_chdir,
1082         .getwd_fn = skel_getwd,
1083         .ntimes_fn = skel_ntimes,
1084         .ftruncate_fn = skel_ftruncate,
1085         .fallocate_fn = skel_fallocate,
1086         .lock_fn = skel_lock,
1087         .kernel_flock_fn = skel_kernel_flock,
1088         .linux_setlease_fn = skel_linux_setlease,
1089         .getlock_fn = skel_getlock,
1090         .symlink_fn = skel_symlink,
1091         .readlink_fn = skel_vfs_readlink,
1092         .link_fn = skel_link,
1093         .mknod_fn = skel_mknod,
1094         .realpath_fn = skel_realpath,
1095         .chflags_fn = skel_chflags,
1096         .file_id_create_fn = skel_file_id_create,
1097         .copy_chunk_send_fn = skel_copy_chunk_send,
1098         .copy_chunk_recv_fn = skel_copy_chunk_recv,
1099         .get_compression_fn = skel_get_compression,
1100         .set_compression_fn = skel_set_compression,
1101
1102         .streaminfo_fn = skel_streaminfo,
1103         .get_real_filename_fn = skel_get_real_filename,
1104         .connectpath_fn = skel_connectpath,
1105         .brl_lock_windows_fn = skel_brl_lock_windows,
1106         .brl_unlock_windows_fn = skel_brl_unlock_windows,
1107         .brl_cancel_windows_fn = skel_brl_cancel_windows,
1108         .strict_lock_fn = skel_strict_lock,
1109         .strict_unlock_fn = skel_strict_unlock,
1110         .translate_name_fn = skel_translate_name,
1111         .fsctl_fn = skel_fsctl,
1112         .readdir_attr_fn = skel_readdir_attr,
1113
1114         /* DOS attributes. */
1115         .get_dos_attributes_fn = skel_get_dos_attributes,
1116         .fget_dos_attributes_fn = skel_fget_dos_attributes,
1117         .set_dos_attributes_fn = skel_set_dos_attributes,
1118         .fset_dos_attributes_fn = skel_fset_dos_attributes,
1119
1120         /* NT ACL operations. */
1121
1122         .fget_nt_acl_fn = skel_fget_nt_acl,
1123         .get_nt_acl_fn = skel_get_nt_acl,
1124         .fset_nt_acl_fn = skel_fset_nt_acl,
1125
1126         /* POSIX ACL operations. */
1127
1128         .chmod_acl_fn = skel_chmod_acl,
1129         .fchmod_acl_fn = skel_fchmod_acl,
1130
1131         .sys_acl_get_file_fn = skel_sys_acl_get_file,
1132         .sys_acl_get_fd_fn = skel_sys_acl_get_fd,
1133         .sys_acl_blob_get_file_fn = skel_sys_acl_blob_get_file,
1134         .sys_acl_blob_get_fd_fn = skel_sys_acl_blob_get_fd,
1135         .sys_acl_set_file_fn = skel_sys_acl_set_file,
1136         .sys_acl_set_fd_fn = skel_sys_acl_set_fd,
1137         .sys_acl_delete_def_file_fn = skel_sys_acl_delete_def_file,
1138
1139         /* EA operations. */
1140         .getxattr_fn = skel_getxattr,
1141         .fgetxattr_fn = skel_fgetxattr,
1142         .listxattr_fn = skel_listxattr,
1143         .flistxattr_fn = skel_flistxattr,
1144         .removexattr_fn = skel_removexattr,
1145         .fremovexattr_fn = skel_fremovexattr,
1146         .setxattr_fn = skel_setxattr,
1147         .fsetxattr_fn = skel_fsetxattr,
1148
1149         /* aio operations */
1150         .aio_force_fn = skel_aio_force,
1151 };
1152
1153 static_decl_vfs;
1154 NTSTATUS vfs_skel_transparent_init(TALLOC_CTX *ctx)
1155 {
1156         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "skel_transparent",
1157                                 &skel_transparent_fns);
1158 }