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