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