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, const char *path)
 519 {
 520         return SMB_VFS_NEXT_CHDIR(handle, path);
 521 }
 522
 523 static char *skel_getwd(vfs_handle_struct *handle)
 524 {
 525         return SMB_VFS_NEXT_GETWD(handle);
 526 }
 527
 528 static int skel_ntimes(vfs_handle_struct *handle,
 529                        const struct smb_filename *smb_fname,
 530                        struct smb_file_time *ft)
 531 {
 532         return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft);
 533 }
 534
 535 static int skel_ftruncate(vfs_handle_struct *handle, files_struct *fsp,
 536                           off_t offset)
 537 {
 538         return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
 539 }
 540
 541 static int skel_fallocate(vfs_handle_struct *handle, files_struct *fsp,
 542                           uint32_t mode, off_t offset, off_t len)
 543 {
 544         return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
 545 }
 546
 547 static bool skel_lock(vfs_handle_struct *handle, files_struct *fsp, int op,
 548                       off_t offset, off_t count, int type)
 549 {
 550         return SMB_VFS_NEXT_LOCK(handle, fsp, op, offset, count, type);
 551 }
 552
 553 static int skel_kernel_flock(struct vfs_handle_struct *handle,
 554                              struct files_struct *fsp, uint32_t share_mode,
 555                              uint32_t access_mask)
 556 {
 557         return SMB_VFS_NEXT_KERNEL_FLOCK(handle, fsp, share_mode, access_mask);
 558 }
 559
 560 static int skel_linux_setlease(struct vfs_handle_struct *handle,
 561                                struct files_struct *fsp, int leasetype)
 562 {
 563         return SMB_VFS_NEXT_LINUX_SETLEASE(handle, fsp, leasetype);
 564 }
 565
 566 static bool skel_getlock(vfs_handle_struct *handle, files_struct *fsp,
 567                          off_t *poffset, off_t *pcount, int *ptype,
 568                          pid_t *ppid)
 569 {
 570         return SMB_VFS_NEXT_GETLOCK(handle, fsp, poffset, pcount, ptype, ppid);
 571 }
 572
 573 static int skel_symlink(vfs_handle_struct *handle,
 574                         const char *link_contents,
 575                         const struct smb_filename *new_smb_fname)
 576 {
 577         return SMB_VFS_NEXT_SYMLINK(handle, link_contents, new_smb_fname);
 578 }
 579
 580 static int skel_vfs_readlink(vfs_handle_struct *handle,
 581                         const struct smb_filename *smb_fname,
 582                         char *buf,
 583                         size_t bufsiz)
 584 {
 585         return SMB_VFS_NEXT_READLINK(handle, smb_fname, buf, bufsiz);
 586 }
 587
 588 static int skel_link(vfs_handle_struct *handle,
 589                         const struct smb_filename *old_smb_fname,
 590                         const struct smb_filename *new_smb_fname)
 591 {
 592         return SMB_VFS_NEXT_LINK(handle, old_smb_fname, new_smb_fname);
 593 }
 594
 595 static int skel_mknod(vfs_handle_struct *handle,
 596                         const struct smb_filename *smb_fname,
 597                         mode_t mode,
 598                         SMB_DEV_T dev)
 599 {
 600         return SMB_VFS_NEXT_MKNOD(handle, smb_fname, mode, dev);
 601 }
 602
 603 static char *skel_realpath(vfs_handle_struct *handle, const char *path)
 604 {
 605         return SMB_VFS_NEXT_REALPATH(handle, path);
 606 }
 607
 608 static int skel_chflags(vfs_handle_struct *handle,
 609                         const struct smb_filename *smb_fname,
 610                         uint flags)
 611 {
 612         return SMB_VFS_NEXT_CHFLAGS(handle, smb_fname, flags);
 613 }
 614
 615 static struct file_id skel_file_id_create(vfs_handle_struct *handle,
 616                                           const SMB_STRUCT_STAT *sbuf)
 617 {
 618         return SMB_VFS_NEXT_FILE_ID_CREATE(handle, sbuf);
 619 }
 620
 621 struct skel_cc_state {
 622         struct vfs_handle_struct *handle;
 623         off_t copied;
 624 };
 625 static void skel_copy_chunk_done(struct tevent_req *subreq);
 626
 627 static struct tevent_req *skel_copy_chunk_send(struct vfs_handle_struct *handle,
 628                                                TALLOC_CTX *mem_ctx,
 629                                                struct tevent_context *ev,
 630                                                struct files_struct *src_fsp,
 631                                                off_t src_off,
 632                                                struct files_struct *dest_fsp,
 633                                                off_t dest_off,
 634                                                off_t num,
 635                                                uint32_t flags)
 636 {
 637         struct tevent_req *req;
 638         struct tevent_req *subreq;
 639         struct skel_cc_state *cc_state;
 640
 641         req = tevent_req_create(mem_ctx, &cc_state, struct skel_cc_state);
 642         if (req == NULL) {
 643                 return NULL;
 644         }
 645
 646         cc_state->handle = handle;
 647         subreq = SMB_VFS_NEXT_COPY_CHUNK_SEND(handle, cc_state, ev,
 648                                               src_fsp, src_off,
 649                                               dest_fsp, dest_off, num, flags);
 650         if (tevent_req_nomem(subreq, req)) {
 651                 return tevent_req_post(req, ev);
 652         }
 653
 654         tevent_req_set_callback(subreq, skel_copy_chunk_done, req);
 655         return req;
 656 }
 657
 658 static void skel_copy_chunk_done(struct tevent_req *subreq)
 659 {
 660         struct tevent_req *req = tevent_req_callback_data(
 661                 subreq, struct tevent_req);
 662         struct skel_cc_state *cc_state
 663                         = tevent_req_data(req, struct skel_cc_state);
 664         NTSTATUS status;
 665
 666         status = SMB_VFS_NEXT_COPY_CHUNK_RECV(cc_state->handle,
 667                                               subreq,
 668                                               &cc_state->copied);
 669         TALLOC_FREE(subreq);
 670         if (tevent_req_nterror(req, status)) {
 671                 return;
 672         }
 673         tevent_req_done(req);
 674 }
 675
 676 static NTSTATUS skel_copy_chunk_recv(struct vfs_handle_struct *handle,
 677                                      struct tevent_req *req,
 678                                      off_t *copied)
 679 {
 680         struct skel_cc_state *cc_state
 681                         = tevent_req_data(req, struct skel_cc_state);
 682         NTSTATUS status;
 683
 684         *copied = cc_state->copied;
 685         if (tevent_req_is_nterror(req, &status)) {
 686                 tevent_req_received(req);
 687                 return status;
 688         }
 689
 690         tevent_req_received(req);
 691         return NT_STATUS_OK;
 692 }
 693
 694 static NTSTATUS skel_get_compression(struct vfs_handle_struct *handle,
 695                                      TALLOC_CTX *mem_ctx,
 696                                      struct files_struct *fsp,
 697                                      struct smb_filename *smb_fname,
 698                                      uint16_t *_compression_fmt)
 699 {
 700         return SMB_VFS_NEXT_GET_COMPRESSION(handle, mem_ctx, fsp, smb_fname,
 701                                             _compression_fmt);
 702 }
 703
 704 static NTSTATUS skel_set_compression(struct vfs_handle_struct *handle,
 705                                      TALLOC_CTX *mem_ctx,
 706                                      struct files_struct *fsp,
 707                                      uint16_t compression_fmt)
 708 {
 709         return SMB_VFS_NEXT_SET_COMPRESSION(handle, mem_ctx, fsp,
 710                                             compression_fmt);
 711 }
 712
 713 static NTSTATUS skel_streaminfo(struct vfs_handle_struct *handle,
 714                                 struct files_struct *fsp,
 715                                 const struct smb_filename *smb_fname,
 716                                 TALLOC_CTX *mem_ctx,
 717                                 unsigned int *num_streams,
 718                                 struct stream_struct **streams)
 719 {
 720         return SMB_VFS_NEXT_STREAMINFO(handle,
 721                                 fsp,
 722                                 smb_fname,
 723                                 mem_ctx,
 724                                 num_streams,
 725                                 streams);
 726 }
 727
 728 static int skel_get_real_filename(struct vfs_handle_struct *handle,
 729                                   const char *path,
 730                                   const char *name,
 731                                   TALLOC_CTX *mem_ctx, char **found_name)
 732 {
 733         return SMB_VFS_NEXT_GET_REAL_FILENAME(handle,
 734                                               path, name, mem_ctx, found_name);
 735 }
 736
 737 static const char *skel_connectpath(struct vfs_handle_struct *handle,
 738                                     const char *filename)
 739 {
 740         return SMB_VFS_NEXT_CONNECTPATH(handle, filename);
 741 }
 742
 743 static NTSTATUS skel_brl_lock_windows(struct vfs_handle_struct *handle,
 744                                       struct byte_range_lock *br_lck,
 745                                       struct lock_struct *plock,
 746                                       bool blocking_lock)
 747 {
 748         return SMB_VFS_NEXT_BRL_LOCK_WINDOWS(handle,
 749                                              br_lck, plock, blocking_lock);
 750 }
 751
 752 static bool skel_brl_unlock_windows(struct vfs_handle_struct *handle,
 753                                     struct messaging_context *msg_ctx,
 754                                     struct byte_range_lock *br_lck,
 755                                     const struct lock_struct *plock)
 756 {
 757         return SMB_VFS_NEXT_BRL_UNLOCK_WINDOWS(handle, msg_ctx, br_lck, plock);
 758 }
 759
 760 static bool skel_brl_cancel_windows(struct vfs_handle_struct *handle,
 761                                     struct byte_range_lock *br_lck,
 762                                     struct lock_struct *plock)
 763 {
 764         return SMB_VFS_NEXT_BRL_CANCEL_WINDOWS(handle, br_lck, plock);
 765 }
 766
 767 static bool skel_strict_lock(struct vfs_handle_struct *handle,
 768                              struct files_struct *fsp,
 769                              struct lock_struct *plock)
 770 {
 771         return SMB_VFS_NEXT_STRICT_LOCK(handle, fsp, plock);
 772 }
 773
 774 static void skel_strict_unlock(struct vfs_handle_struct *handle,
 775                                struct files_struct *fsp,
 776                                struct lock_struct *plock)
 777 {
 778         SMB_VFS_NEXT_STRICT_UNLOCK(handle, fsp, plock);
 779 }
 780
 781 static NTSTATUS skel_translate_name(struct vfs_handle_struct *handle,
 782                                     const char *mapped_name,
 783                                     enum vfs_translate_direction direction,
 784                                     TALLOC_CTX *mem_ctx, char **pmapped_name)
 785 {
 786         return SMB_VFS_NEXT_TRANSLATE_NAME(handle, mapped_name, direction,
 787                                            mem_ctx, pmapped_name);
 788 }
 789
 790 static NTSTATUS skel_fsctl(struct vfs_handle_struct *handle,
 791                            struct files_struct *fsp,
 792                            TALLOC_CTX *ctx,
 793                            uint32_t function,
 794                            uint16_t req_flags,  /* Needed for UNICODE ... */
 795                            const uint8_t *_in_data,
 796                            uint32_t in_len,
 797                            uint8_t ** _out_data,
 798                            uint32_t max_out_len, uint32_t *out_len)
 799 {
 800         return SMB_VFS_NEXT_FSCTL(handle,
 801                                   fsp,
 802                                   ctx,
 803                                   function,
 804                                   req_flags,
 805                                   _in_data,
 806                                   in_len, _out_data, max_out_len, out_len);
 807 }
 808
 809 static NTSTATUS skel_readdir_attr(struct vfs_handle_struct *handle,
 810                                   const struct smb_filename *fname,
 811                                   TALLOC_CTX *mem_ctx,
 812                                   struct readdir_attr_data **pattr_data)
 813 {
 814         return SMB_VFS_NEXT_READDIR_ATTR(handle, fname, mem_ctx, pattr_data);
 815 }
 816
 817 static NTSTATUS skel_get_dos_attributes(struct vfs_handle_struct *handle,
 818                                 struct smb_filename *smb_fname,
 819                                 uint32_t *dosmode)
 820 {
 821         return SMB_VFS_NEXT_GET_DOS_ATTRIBUTES(handle,
 822                                 smb_fname,
 823                                 dosmode);
 824 }
 825
 826 static NTSTATUS skel_fget_dos_attributes(struct vfs_handle_struct *handle,
 827                                 struct files_struct *fsp,
 828                                 uint32_t *dosmode)
 829 {
 830         return SMB_VFS_NEXT_FGET_DOS_ATTRIBUTES(handle,
 831                                 fsp,
 832                                 dosmode);
 833 }
 834
 835 static NTSTATUS skel_set_dos_attributes(struct vfs_handle_struct *handle,
 836                                 const struct smb_filename *smb_fname,
 837                                 uint32_t dosmode)
 838 {
 839         return SMB_VFS_NEXT_SET_DOS_ATTRIBUTES(handle,
 840                                 smb_fname,
 841                                 dosmode);
 842 }
 843
 844 static NTSTATUS skel_fset_dos_attributes(struct vfs_handle_struct *handle,
 845                                 struct files_struct *fsp,
 846                                 uint32_t dosmode)
 847 {
 848         return SMB_VFS_NEXT_FSET_DOS_ATTRIBUTES(handle,
 849                                 fsp,
 850                                 dosmode);
 851 }
 852
 853 static NTSTATUS skel_fget_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
 854                                  uint32_t security_info,
 855                                  TALLOC_CTX *mem_ctx,
 856                                  struct security_descriptor **ppdesc)
 857 {
 858         return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info, mem_ctx,
 859                                         ppdesc);
 860 }
 861
 862 static NTSTATUS skel_get_nt_acl(vfs_handle_struct *handle,
 863                                 const struct smb_filename *smb_fname,
 864                                 uint32_t security_info,
 865                                 TALLOC_CTX *mem_ctx,
 866                                 struct security_descriptor **ppdesc)
 867 {
 868         return SMB_VFS_NEXT_GET_NT_ACL(handle,
 869                                 smb_fname,
 870                                 security_info,
 871                                 mem_ctx,
 872                                 ppdesc);
 873 }
 874
 875 static NTSTATUS skel_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
 876                                  uint32_t security_info_sent,
 877                                  const struct security_descriptor *psd)
 878 {
 879         return SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
 880 }
 881
 882 static int skel_chmod_acl(vfs_handle_struct *handle,
 883                         const struct smb_filename *smb_fname,
 884                         mode_t mode)
 885 {
 886         return SMB_VFS_NEXT_CHMOD_ACL(handle, smb_fname, mode);
 887 }
 888
 889 static int skel_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp,
 890                            mode_t mode)
 891 {
 892         return SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 893 }
 894
 895 static SMB_ACL_T skel_sys_acl_get_file(vfs_handle_struct *handle,
 896                                        const struct smb_filename *smb_fname,
 897                                        SMB_ACL_TYPE_T type,
 898                                        TALLOC_CTX *mem_ctx)
 899 {
 900         return SMB_VFS_NEXT_SYS_ACL_GET_FILE(handle, smb_fname, type, mem_ctx);
 901 }
 902
 903 static SMB_ACL_T skel_sys_acl_get_fd(vfs_handle_struct *handle,
 904                                      files_struct *fsp, TALLOC_CTX *mem_ctx)
 905 {
 906         return SMB_VFS_NEXT_SYS_ACL_GET_FD(handle, fsp, mem_ctx);
 907 }
 908
 909 static int skel_sys_acl_blob_get_file(vfs_handle_struct *handle,
 910                                 const struct smb_filename *smb_fname,
 911                                 TALLOC_CTX *mem_ctx,
 912                                 char **blob_description,
 913                                 DATA_BLOB *blob)
 914 {
 915         return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FILE(handle, smb_fname, mem_ctx,
 916                                                   blob_description, blob);
 917 }
 918
 919 static int skel_sys_acl_blob_get_fd(vfs_handle_struct *handle,
 920                                     files_struct *fsp, TALLOC_CTX *mem_ctx,
 921                                     char **blob_description, DATA_BLOB *blob)
 922 {
 923         return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FD(handle, fsp, mem_ctx,
 924                                                 blob_description, blob);
 925 }
 926
 927 static int skel_sys_acl_set_file(vfs_handle_struct *handle,
 928                                 const struct smb_filename *smb_fname,
 929                                 SMB_ACL_TYPE_T acltype,
 930                                 SMB_ACL_T theacl)
 931 {
 932         return SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle, smb_fname,
 933                         acltype, theacl);
 934 }
 935
 936 static int skel_sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
 937                                SMB_ACL_T theacl)
 938 {
 939         return SMB_VFS_NEXT_SYS_ACL_SET_FD(handle, fsp, theacl);
 940 }
 941
 942 static int skel_sys_acl_delete_def_file(vfs_handle_struct *handle,
 943                                         const struct smb_filename *smb_fname)
 944 {
 945         return SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FILE(handle, smb_fname);
 946 }
 947
 948 static ssize_t skel_getxattr(vfs_handle_struct *handle,
 949                                 const struct smb_filename *smb_fname,
 950                                 const char *name,
 951                                 void *value,
 952                                 size_t size)
 953 {
 954         return SMB_VFS_NEXT_GETXATTR(handle, smb_fname, name, value, size);
 955 }
 956
 957 static ssize_t skel_fgetxattr(vfs_handle_struct *handle,
 958                               struct files_struct *fsp, const char *name,
 959                               void *value, size_t size)
 960 {
 961         return SMB_VFS_NEXT_FGETXATTR(handle, fsp, name, value, size);
 962 }
 963
 964 static ssize_t skel_listxattr(vfs_handle_struct *handle,
 965                                 const struct smb_filename *smb_fname,
 966                                 char *list,
 967                                 size_t size)
 968 {
 969         return SMB_VFS_NEXT_LISTXATTR(handle, smb_fname, list, size);
 970 }
 971
 972 static ssize_t skel_flistxattr(vfs_handle_struct *handle,
 973                                struct files_struct *fsp, char *list,
 974                                size_t size)
 975 {
 976         return SMB_VFS_NEXT_FLISTXATTR(handle, fsp, list, size);
 977 }
 978
 979 static int skel_removexattr(vfs_handle_struct *handle,
 980                         const struct smb_filename *smb_fname,
 981                         const char *name)
 982 {
 983         return SMB_VFS_NEXT_REMOVEXATTR(handle, smb_fname, name);
 984 }
 985
 986 static int skel_fremovexattr(vfs_handle_struct *handle,
 987                              struct files_struct *fsp, const char *name)
 988 {
 989         return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, name);
 990 }
 991
 992 static int skel_setxattr(vfs_handle_struct *handle,
 993                         const struct smb_filename *smb_fname,
 994                         const char *name,
 995                         const void *value,
 996                         size_t size,
 997                         int flags)
 998 {
 999         return SMB_VFS_NEXT_SETXATTR(handle, smb_fname,
1000                         name, value, size, flags);
1001 }
1002
1003 static int skel_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp,
1004                           const char *name, const void *value, size_t size,
1005                           int flags)
1006 {
1007         return SMB_VFS_NEXT_FSETXATTR(handle, fsp, name, value, size, flags);
1008 }
1009
1010 static bool skel_aio_force(struct vfs_handle_struct *handle,
1011                            struct files_struct *fsp)
1012 {
1013         return SMB_VFS_NEXT_AIO_FORCE(handle, fsp);
1014 }
1015
1016 /* VFS operations structure */
1017
1018 struct vfs_fn_pointers skel_transparent_fns = {
1019         /* Disk operations */
1020
1021         .connect_fn = skel_connect,
1022         .disconnect_fn = skel_disconnect,
1023         .disk_free_fn = skel_disk_free,
1024         .get_quota_fn = skel_get_quota,
1025         .set_quota_fn = skel_set_quota,
1026         .get_shadow_copy_data_fn = skel_get_shadow_copy_data,
1027         .statvfs_fn = skel_statvfs,
1028         .fs_capabilities_fn = skel_fs_capabilities,
1029         .get_dfs_referrals_fn = skel_get_dfs_referrals,
1030         .snap_check_path_fn = skel_snap_check_path,
1031         .snap_create_fn = skel_snap_create,
1032         .snap_delete_fn = skel_snap_delete,
1033
1034         /* Directory operations */
1035
1036         .opendir_fn = skel_opendir,
1037         .fdopendir_fn = skel_fdopendir,
1038         .readdir_fn = skel_readdir,
1039         .seekdir_fn = skel_seekdir,
1040         .telldir_fn = skel_telldir,
1041         .rewind_dir_fn = skel_rewind_dir,
1042         .mkdir_fn = skel_mkdir,
1043         .rmdir_fn = skel_rmdir,
1044         .closedir_fn = skel_closedir,
1045         .init_search_op_fn = skel_init_search_op,
1046
1047         /* File operations */
1048
1049         .open_fn = skel_open,
1050         .create_file_fn = skel_create_file,
1051         .close_fn = skel_close_fn,
1052         .read_fn = skel_vfs_read,
1053         .pread_fn = skel_pread,
1054         .pread_send_fn = skel_pread_send,
1055         .pread_recv_fn = skel_pread_recv,
1056         .write_fn = skel_write,
1057         .pwrite_fn = skel_pwrite,
1058         .pwrite_send_fn = skel_pwrite_send,
1059         .pwrite_recv_fn = skel_pwrite_recv,
1060         .lseek_fn = skel_lseek,
1061         .sendfile_fn = skel_sendfile,
1062         .recvfile_fn = skel_recvfile,
1063         .rename_fn = skel_rename,
1064         .fsync_fn = skel_fsync,
1065         .fsync_send_fn = skel_fsync_send,
1066         .fsync_recv_fn = skel_fsync_recv,
1067         .stat_fn = skel_stat,
1068         .fstat_fn = skel_fstat,
1069         .lstat_fn = skel_lstat,
1070         .get_alloc_size_fn = skel_get_alloc_size,
1071         .unlink_fn = skel_unlink,
1072         .chmod_fn = skel_chmod,
1073         .fchmod_fn = skel_fchmod,
1074         .chown_fn = skel_chown,
1075         .fchown_fn = skel_fchown,
1076         .lchown_fn = skel_lchown,
1077         .chdir_fn = skel_chdir,
1078         .getwd_fn = skel_getwd,
1079         .ntimes_fn = skel_ntimes,
1080         .ftruncate_fn = skel_ftruncate,
1081         .fallocate_fn = skel_fallocate,
1082         .lock_fn = skel_lock,
1083         .kernel_flock_fn = skel_kernel_flock,
1084         .linux_setlease_fn = skel_linux_setlease,
1085         .getlock_fn = skel_getlock,
1086         .symlink_fn = skel_symlink,
1087         .readlink_fn = skel_vfs_readlink,
1088         .link_fn = skel_link,
1089         .mknod_fn = skel_mknod,
1090         .realpath_fn = skel_realpath,
1091         .chflags_fn = skel_chflags,
1092         .file_id_create_fn = skel_file_id_create,
1093         .copy_chunk_send_fn = skel_copy_chunk_send,
1094         .copy_chunk_recv_fn = skel_copy_chunk_recv,
1095         .get_compression_fn = skel_get_compression,
1096         .set_compression_fn = skel_set_compression,
1097
1098         .streaminfo_fn = skel_streaminfo,
1099         .get_real_filename_fn = skel_get_real_filename,
1100         .connectpath_fn = skel_connectpath,
1101         .brl_lock_windows_fn = skel_brl_lock_windows,
1102         .brl_unlock_windows_fn = skel_brl_unlock_windows,
1103         .brl_cancel_windows_fn = skel_brl_cancel_windows,
1104         .strict_lock_fn = skel_strict_lock,
1105         .strict_unlock_fn = skel_strict_unlock,
1106         .translate_name_fn = skel_translate_name,
1107         .fsctl_fn = skel_fsctl,
1108         .readdir_attr_fn = skel_readdir_attr,
1109
1110         /* DOS attributes. */
1111         .get_dos_attributes_fn = skel_get_dos_attributes,
1112         .fget_dos_attributes_fn = skel_fget_dos_attributes,
1113         .set_dos_attributes_fn = skel_set_dos_attributes,
1114         .fset_dos_attributes_fn = skel_fset_dos_attributes,
1115
1116         /* NT ACL operations. */
1117
1118         .fget_nt_acl_fn = skel_fget_nt_acl,
1119         .get_nt_acl_fn = skel_get_nt_acl,
1120         .fset_nt_acl_fn = skel_fset_nt_acl,
1121
1122         /* POSIX ACL operations. */
1123
1124         .chmod_acl_fn = skel_chmod_acl,
1125         .fchmod_acl_fn = skel_fchmod_acl,
1126
1127         .sys_acl_get_file_fn = skel_sys_acl_get_file,
1128         .sys_acl_get_fd_fn = skel_sys_acl_get_fd,
1129         .sys_acl_blob_get_file_fn = skel_sys_acl_blob_get_file,
1130         .sys_acl_blob_get_fd_fn = skel_sys_acl_blob_get_fd,
1131         .sys_acl_set_file_fn = skel_sys_acl_set_file,
1132         .sys_acl_set_fd_fn = skel_sys_acl_set_fd,
1133         .sys_acl_delete_def_file_fn = skel_sys_acl_delete_def_file,
1134
1135         /* EA operations. */
1136         .getxattr_fn = skel_getxattr,
1137         .fgetxattr_fn = skel_fgetxattr,
1138         .listxattr_fn = skel_listxattr,
1139         .flistxattr_fn = skel_flistxattr,
1140         .removexattr_fn = skel_removexattr,
1141         .fremovexattr_fn = skel_fremovexattr,
1142         .setxattr_fn = skel_setxattr,
1143         .fsetxattr_fn = skel_fsetxattr,
1144
1145         /* aio operations */
1146         .aio_force_fn = skel_aio_force,
1147 };
1148
1149 static_decl_vfs;
1150 NTSTATUS vfs_skel_transparent_init(TALLOC_CTX *ctx)
1151 {
1152         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "skel_transparent",
1153                                 &skel_transparent_fns);
1154 }