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