examples/VFS/skel_transparent.c

   1 /*
   2  * Skeleton VFS module.  Implements passthrough operation of all VFS
   3  * calls to disk functions.
   4  *
   5  * Copyright (C) Tim Potter, 1999-2000
   6  * Copyright (C) Alexander Bokovoy, 2002
   7  * Copyright (C) Stefan (metze) Metzmacher, 2003
   8  * Copyright (C) Jeremy Allison 2009
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 3 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #include "../source3/include/includes.h"
  25 #include "lib/util/tevent_unix.h"
  26 #include "lib/util/tevent_ntstatus.h"
  27
  28 /* PLEASE,PLEASE READ THE VFS MODULES CHAPTER OF THE
  29    SAMBA DEVELOPERS GUIDE!!!!!!
  30  */
  31
  32 /* If you take this file as template for your module
  33  * please make sure that you remove all skel_XXX() functions you don't
  34  * want to implement!! The passthrough operations are not
  35  * neccessary in a real module.
  36  *
  37  * --metze
  38  */
  39
  40 static int skel_connect(vfs_handle_struct *handle, const char *service,
  41                         const char *user)
  42 {
  43         return SMB_VFS_NEXT_CONNECT(handle, service, user);
  44 }
  45
  46 static void skel_disconnect(vfs_handle_struct *handle)
  47 {
  48         SMB_VFS_NEXT_DISCONNECT(handle);
  49 }
  50
  51 static uint64_t skel_disk_free(vfs_handle_struct *handle,
  52                                 const struct smb_filename *smb_fname,
  53                                 uint64_t *bsize,
  54                                 uint64_t *dfree,
  55                                 uint64_t *dsize)
  56 {
  57         return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname, bsize, dfree, dsize);
  58 }
  59
  60 static int skel_get_quota(vfs_handle_struct *handle, const char *path,
  61                           enum SMB_QUOTA_TYPE qtype, unid_t id,
  62                           SMB_DISK_QUOTA *dq)
  63 {
  64         return SMB_VFS_NEXT_GET_QUOTA(handle, path, qtype, id, dq);
  65 }
  66
  67 static int skel_set_quota(vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype,
  68                           unid_t id, SMB_DISK_QUOTA *dq)
  69 {
  70         return SMB_VFS_NEXT_SET_QUOTA(handle, qtype, id, dq);
  71 }
  72
  73 static int skel_get_shadow_copy_data(vfs_handle_struct *handle,
  74                                      files_struct *fsp,
  75                                      struct shadow_copy_data *shadow_copy_data,
  76                                      bool labels)
  77 {
  78         return SMB_VFS_NEXT_GET_SHADOW_COPY_DATA(handle, fsp, shadow_copy_data,
  79                                                  labels);
  80 }
  81
  82 static int skel_statvfs(struct vfs_handle_struct *handle, const char *path,
  83                         struct vfs_statvfs_struct *statbuf)
  84 {
  85         return SMB_VFS_NEXT_STATVFS(handle, path, statbuf);
  86 }
  87
  88 static uint32_t skel_fs_capabilities(struct vfs_handle_struct *handle,
  89                                      enum timestamp_set_resolution *p_ts_res)
  90 {
  91         return SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res);
  92 }
  93
  94 static NTSTATUS skel_get_dfs_referrals(struct vfs_handle_struct *handle,
  95                                        struct dfs_GetDFSReferral *r)
  96 {
  97         return SMB_VFS_NEXT_GET_DFS_REFERRALS(handle, r);
  98 }
  99
 100 static DIR *skel_opendir(vfs_handle_struct *handle,
 101                         const struct smb_filename *smb_fname,
 102                         const char *mask,
 103                         uint32_t attr)
 104 {
 105         return SMB_VFS_NEXT_OPENDIR(handle, smb_fname, mask, attr);
 106 }
 107
 108 static NTSTATUS skel_snap_check_path(struct vfs_handle_struct *handle,
 109                                      TALLOC_CTX *mem_ctx,
 110                                      const char *service_path,
 111                                      char **base_volume)
 112 {
 113         return SMB_VFS_NEXT_SNAP_CHECK_PATH(handle, mem_ctx, service_path,
 114                                             base_volume);
 115 }
 116
 117 static NTSTATUS skel_snap_create(struct vfs_handle_struct *handle,
 118                                  TALLOC_CTX *mem_ctx,
 119                                  const char *base_volume,
 120                                  time_t *tstamp,
 121                                  bool rw,
 122                                  char **base_path,
 123                                  char **snap_path)
 124 {
 125         return SMB_VFS_NEXT_SNAP_CREATE(handle, mem_ctx, base_volume, tstamp,
 126                                         rw, base_path, snap_path);
 127 }
 128
 129 static NTSTATUS skel_snap_delete(struct vfs_handle_struct *handle,
 130                                  TALLOC_CTX *mem_ctx,
 131                                  char *base_path,
 132                                  char *snap_path)
 133 {
 134         return SMB_VFS_NEXT_SNAP_DELETE(handle, mem_ctx, base_path, snap_path);
 135 }
 136
 137 static DIR *skel_fdopendir(vfs_handle_struct *handle, files_struct *fsp,
 138                            const char *mask, uint32_t attr)
 139 {
 140         return SMB_VFS_NEXT_FDOPENDIR(handle, fsp, mask, attr);
 141 }
 142
 143 static struct dirent *skel_readdir(vfs_handle_struct *handle,
 144                                    DIR *dirp, SMB_STRUCT_STAT *sbuf)
 145 {
 146         return SMB_VFS_NEXT_READDIR(handle, dirp, sbuf);
 147 }
 148
 149 static void skel_seekdir(vfs_handle_struct *handle, DIR *dirp, long offset)
 150 {
 151         SMB_VFS_NEXT_SEEKDIR(handle, dirp, offset);
 152 }
 153
 154 static long skel_telldir(vfs_handle_struct *handle, DIR *dirp)
 155 {
 156         return SMB_VFS_NEXT_TELLDIR(handle, dirp);
 157 }
 158
 159 static void skel_rewind_dir(vfs_handle_struct *handle, DIR *dirp)
 160 {
 161         SMB_VFS_NEXT_REWINDDIR(handle, dirp);
 162 }
 163
 164 static int skel_mkdir(vfs_handle_struct *handle,
 165                 const struct smb_filename *smb_fname,
 166                 mode_t mode)
 167 {
 168         return SMB_VFS_NEXT_MKDIR(handle, smb_fname, mode);
 169 }
 170
 171 static int skel_rmdir(vfs_handle_struct *handle,
 172                 const struct smb_filename *smb_fname)
 173 {
 174         return SMB_VFS_NEXT_RMDIR(handle, smb_fname);
 175 }
 176
 177 static int skel_closedir(vfs_handle_struct *handle, DIR *dir)
 178 {
 179         return SMB_VFS_NEXT_CLOSEDIR(handle, dir);
 180 }
 181
 182 static void skel_init_search_op(struct vfs_handle_struct *handle, DIR *dirp)
 183 {
 184         SMB_VFS_NEXT_INIT_SEARCH_OP(handle, dirp);
 185 }
 186
 187 static int skel_open(vfs_handle_struct *handle, struct smb_filename *smb_fname,
 188                      files_struct *fsp, int flags, mode_t mode)
 189 {
 190         return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 191 }
 192
 193 static NTSTATUS skel_create_file(struct vfs_handle_struct *handle,
 194                                  struct smb_request *req,
 195                                  uint16_t root_dir_fid,
 196                                  struct smb_filename *smb_fname,
 197                                  uint32_t access_mask,
 198                                  uint32_t share_access,
 199                                  uint32_t create_disposition,
 200                                  uint32_t create_options,
 201                                  uint32_t file_attributes,
 202                                  uint32_t oplock_request,
 203                                  struct smb2_lease *lease,
 204                                  uint64_t allocation_size,
 205                                  uint32_t private_flags,
 206                                  struct security_descriptor *sd,
 207                                  struct ea_list *ea_list,
 208                                  files_struct ** result, int *pinfo,
 209                                  const struct smb2_create_blobs *in_context_blobs,
 210                                  struct smb2_create_blobs *out_context_blobs)
 211 {
 212         return SMB_VFS_NEXT_CREATE_FILE(handle,
 213                                         req,
 214                                         root_dir_fid,
 215                                         smb_fname,
 216                                         access_mask,
 217                                         share_access,
 218                                         create_disposition,
 219                                         create_options,
 220                                         file_attributes,
 221                                         oplock_request,
 222                                         lease,
 223                                         allocation_size,
 224                                         private_flags,
 225                                         sd, ea_list, result, pinfo,
 226                                         in_context_blobs, out_context_blobs);
 227 }
 228
 229 static int skel_close_fn(vfs_handle_struct *handle, files_struct *fsp)
 230 {
 231         return SMB_VFS_NEXT_CLOSE(handle, fsp);
 232 }
 233
 234 static ssize_t skel_vfs_read(vfs_handle_struct *handle, files_struct *fsp,
 235                              void *data, size_t n)
 236 {
 237         return SMB_VFS_NEXT_READ(handle, fsp, data, n);
 238 }
 239
 240 static ssize_t skel_pread(vfs_handle_struct *handle, files_struct *fsp,
 241                           void *data, size_t n, off_t offset)
 242 {
 243         return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
 244 }
 245
 246 struct skel_pread_state {
 247         ssize_t ret;
 248         struct vfs_aio_state vfs_aio_state;
 249 };
 250
 251 static void skel_pread_done(struct tevent_req *subreq);
 252
 253 static struct tevent_req *skel_pread_send(struct vfs_handle_struct *handle,
 254                                           TALLOC_CTX *mem_ctx,
 255                                           struct tevent_context *ev,
 256                                           struct files_struct *fsp,
 257                                           void *data, size_t n, off_t offset)
 258 {
 259         struct tevent_req *req, *subreq;
 260         struct skel_pread_state *state;
 261
 262         req = tevent_req_create(mem_ctx, &state, struct skel_pread_state);
 263         if (req == NULL) {
 264                 return NULL;
 265         }
 266         subreq = SMB_VFS_NEXT_PREAD_SEND(state, ev, handle, fsp, data,
 267                                          n, offset);
 268         if (tevent_req_nomem(subreq, req)) {
 269                 return tevent_req_post(req, ev);
 270         }
 271         tevent_req_set_callback(subreq, skel_pread_done, req);
 272         return req;
 273 }
 274
 275 static void skel_pread_done(struct tevent_req *subreq)
 276 {
 277         struct tevent_req *req =
 278             tevent_req_callback_data(subreq, struct tevent_req);
 279         struct skel_pread_state *state =
 280             tevent_req_data(req, struct skel_pread_state);
 281
 282         state->ret = SMB_VFS_PREAD_RECV(subreq, &state->vfs_aio_state);
 283         TALLOC_FREE(subreq);
 284         tevent_req_done(req);
 285 }
 286
 287 static ssize_t skel_pread_recv(struct tevent_req *req,
 288                                struct vfs_aio_state *vfs_aio_state)
 289 {
 290         struct skel_pread_state *state =
 291             tevent_req_data(req, struct skel_pread_state);
 292
 293         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 294                 return -1;
 295         }
 296         *vfs_aio_state = state->vfs_aio_state;
 297         return state->ret;
 298 }
 299
 300 static ssize_t skel_write(vfs_handle_struct *handle, files_struct *fsp,
 301                           const void *data, size_t n)
 302 {
 303         return SMB_VFS_NEXT_WRITE(handle, fsp, data, n);
 304 }
 305
 306 static ssize_t skel_pwrite(vfs_handle_struct *handle, files_struct *fsp,
 307                            const void *data, size_t n, off_t offset)
 308 {
 309         return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 310 }
 311
 312 struct skel_pwrite_state {
 313         ssize_t ret;
 314         struct vfs_aio_state vfs_aio_state;
 315 };
 316
 317 static void skel_pwrite_done(struct tevent_req *subreq);
 318
 319 static struct tevent_req *skel_pwrite_send(struct vfs_handle_struct *handle,
 320                                            TALLOC_CTX *mem_ctx,
 321                                            struct tevent_context *ev,
 322                                            struct files_struct *fsp,
 323                                            const void *data,
 324                                            size_t n, off_t offset)
 325 {
 326         struct tevent_req *req, *subreq;
 327         struct skel_pwrite_state *state;
 328
 329         req = tevent_req_create(mem_ctx, &state, struct skel_pwrite_state);
 330         if (req == NULL) {
 331                 return NULL;
 332         }
 333         subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp, data,
 334                                           n, offset);
 335         if (tevent_req_nomem(subreq, req)) {
 336                 return tevent_req_post(req, ev);
 337         }
 338         tevent_req_set_callback(subreq, skel_pwrite_done, req);
 339         return req;
 340 }
 341
 342 static void skel_pwrite_done(struct tevent_req *subreq)
 343 {
 344         struct tevent_req *req =
 345             tevent_req_callback_data(subreq, struct tevent_req);
 346         struct skel_pwrite_state *state =
 347             tevent_req_data(req, struct skel_pwrite_state);
 348
 349         state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
 350         TALLOC_FREE(subreq);
 351         tevent_req_done(req);
 352 }
 353
 354 static ssize_t skel_pwrite_recv(struct tevent_req *req,
 355                                 struct vfs_aio_state *vfs_aio_state)
 356 {
 357         struct skel_pwrite_state *state =
 358             tevent_req_data(req, struct skel_pwrite_state);
 359
 360         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 361                 return -1;
 362         }
 363         *vfs_aio_state = state->vfs_aio_state;
 364         return state->ret;
 365 }
 366
 367 static off_t skel_lseek(vfs_handle_struct *handle, files_struct *fsp,
 368                         off_t offset, int whence)
 369 {
 370         return SMB_VFS_NEXT_LSEEK(handle, fsp, offset, whence);
 371 }
 372
 373 static ssize_t skel_sendfile(vfs_handle_struct *handle, int tofd,
 374                              files_struct *fromfsp, const DATA_BLOB *hdr,
 375                              off_t offset, size_t n)
 376 {
 377         return SMB_VFS_NEXT_SENDFILE(handle, tofd, fromfsp, hdr, offset, n);
 378 }
 379
 380 static ssize_t skel_recvfile(vfs_handle_struct *handle, int fromfd,
 381                              files_struct *tofsp, off_t offset, size_t n)
 382 {
 383         return SMB_VFS_NEXT_RECVFILE(handle, fromfd, tofsp, offset, n);
 384 }
 385
 386 static int skel_rename(vfs_handle_struct *handle,
 387                        const struct smb_filename *smb_fname_src,
 388                        const struct smb_filename *smb_fname_dst)
 389 {
 390         return SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 391 }
 392
 393 static int skel_fsync(vfs_handle_struct *handle, files_struct *fsp)
 394 {
 395         return SMB_VFS_NEXT_FSYNC(handle, fsp);
 396 }
 397
 398 struct skel_fsync_state {
 399         int ret;
 400         struct vfs_aio_state vfs_aio_state;
 401 };
 402
 403 static void skel_fsync_done(struct tevent_req *subreq);
 404
 405 static struct tevent_req *skel_fsync_send(struct vfs_handle_struct *handle,
 406                                           TALLOC_CTX *mem_ctx,
 407                                           struct tevent_context *ev,
 408                                           struct files_struct *fsp)
 409 {
 410         struct tevent_req *req, *subreq;
 411         struct skel_fsync_state *state;
 412
 413         req = tevent_req_create(mem_ctx, &state, struct skel_fsync_state);
 414         if (req == NULL) {
 415                 return NULL;
 416         }
 417         subreq = SMB_VFS_NEXT_FSYNC_SEND(state, ev, handle, fsp);
 418         if (tevent_req_nomem(subreq, req)) {
 419                 return tevent_req_post(req, ev);
 420         }
 421         tevent_req_set_callback(subreq, skel_fsync_done, req);
 422         return req;
 423 }
 424
 425 static void skel_fsync_done(struct tevent_req *subreq)
 426 {
 427         struct tevent_req *req =
 428             tevent_req_callback_data(subreq, struct tevent_req);
 429         struct skel_fsync_state *state =
 430             tevent_req_data(req, struct skel_fsync_state);
 431
 432         state->ret = SMB_VFS_FSYNC_RECV(subreq, &state->vfs_aio_state);
 433         TALLOC_FREE(subreq);
 434         tevent_req_done(req);
 435 }
 436
 437 static int skel_fsync_recv(struct tevent_req *req,
 438                            struct vfs_aio_state *vfs_aio_state)
 439 {
 440         struct skel_fsync_state *state =
 441             tevent_req_data(req, struct skel_fsync_state);
 442
 443         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 444                 return -1;
 445         }
 446         *vfs_aio_state = state->vfs_aio_state;
 447         return state->ret;
 448 }
 449
 450 static int skel_stat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
 451 {
 452         return SMB_VFS_NEXT_STAT(handle, smb_fname);
 453 }
 454
 455 static int skel_fstat(vfs_handle_struct *handle, files_struct *fsp,
 456                       SMB_STRUCT_STAT *sbuf)
 457 {
 458         return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
 459 }
 460
 461 static int skel_lstat(vfs_handle_struct *handle,
 462                       struct smb_filename *smb_fname)
 463 {
 464         return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
 465 }
 466
 467 static uint64_t skel_get_alloc_size(struct vfs_handle_struct *handle,
 468                                     struct files_struct *fsp,
 469                                     const SMB_STRUCT_STAT *sbuf)
 470 {
 471         return SMB_VFS_NEXT_GET_ALLOC_SIZE(handle, fsp, sbuf);
 472 }
 473
 474 static int skel_unlink(vfs_handle_struct *handle,
 475                        const struct smb_filename *smb_fname)
 476 {
 477         return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 478 }
 479
 480 static int skel_chmod(vfs_handle_struct *handle,
 481                         const struct smb_filename *smb_fname,
 482                         mode_t mode)
 483 {
 484         return SMB_VFS_NEXT_CHMOD(handle, smb_fname, mode);
 485 }
 486
 487 static int skel_fchmod(vfs_handle_struct *handle, files_struct *fsp,
 488                        mode_t mode)
 489 {
 490         return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 491 }
 492
 493 static int skel_chown(vfs_handle_struct *handle,
 494                         const struct smb_filename *smb_fname,
 495                         uid_t uid,
 496                         gid_t gid)
 497 {
 498         return SMB_VFS_NEXT_CHOWN(handle, smb_fname, uid, gid);
 499 }
 500
 501 static int skel_fchown(vfs_handle_struct *handle, files_struct *fsp,
 502                        uid_t uid, gid_t gid)
 503 {
 504         return SMB_VFS_NEXT_FCHOWN(handle, fsp, uid, gid);
 505 }
 506
 507 static int skel_lchown(vfs_handle_struct *handle,
 508                         const struct smb_filename *smb_fname,
 509                         uid_t uid,
 510                         gid_t gid)
 511 {
 512         return SMB_VFS_NEXT_LCHOWN(handle, smb_fname, uid, gid);
 513 }
 514
 515 static int skel_chdir(vfs_handle_struct *handle, const char *path)
 516 {
 517         return SMB_VFS_NEXT_CHDIR(handle, path);
 518 }
 519
 520 static char *skel_getwd(vfs_handle_struct *handle)
 521 {
 522         return SMB_VFS_NEXT_GETWD(handle);
 523 }
 524
 525 static int skel_ntimes(vfs_handle_struct *handle,
 526                        const struct smb_filename *smb_fname,
 527                        struct smb_file_time *ft)
 528 {
 529         return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft);
 530 }
 531
 532 static int skel_ftruncate(vfs_handle_struct *handle, files_struct *fsp,
 533                           off_t offset)
 534 {
 535         return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
 536 }
 537
 538 static int skel_fallocate(vfs_handle_struct *handle, files_struct *fsp,
 539                           uint32_t mode, off_t offset, off_t len)
 540 {
 541         return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
 542 }
 543
 544 static bool skel_lock(vfs_handle_struct *handle, files_struct *fsp, int op,
 545                       off_t offset, off_t count, int type)
 546 {
 547         return SMB_VFS_NEXT_LOCK(handle, fsp, op, offset, count, type);
 548 }
 549
 550 static int skel_kernel_flock(struct vfs_handle_struct *handle,
 551                              struct files_struct *fsp, uint32_t share_mode,
 552                              uint32_t access_mask)
 553 {
 554         return SMB_VFS_NEXT_KERNEL_FLOCK(handle, fsp, share_mode, access_mask);
 555 }
 556
 557 static int skel_linux_setlease(struct vfs_handle_struct *handle,
 558                                struct files_struct *fsp, int leasetype)
 559 {
 560         return SMB_VFS_NEXT_LINUX_SETLEASE(handle, fsp, leasetype);
 561 }
 562
 563 static bool skel_getlock(vfs_handle_struct *handle, files_struct *fsp,
 564                          off_t *poffset, off_t *pcount, int *ptype,
 565                          pid_t *ppid)
 566 {
 567         return SMB_VFS_NEXT_GETLOCK(handle, fsp, poffset, pcount, ptype, ppid);
 568 }
 569
 570 static int skel_symlink(vfs_handle_struct *handle, const char *oldpath,
 571                         const char *newpath)
 572 {
 573         return SMB_VFS_NEXT_SYMLINK(handle, oldpath, newpath);
 574 }
 575
 576 static int skel_vfs_readlink(vfs_handle_struct *handle, const char *path,
 577                              char *buf, size_t bufsiz)
 578 {
 579         return SMB_VFS_NEXT_READLINK(handle, path, buf, bufsiz);
 580 }
 581
 582 static int skel_link(vfs_handle_struct *handle, const char *oldpath,
 583                      const char *newpath)
 584 {
 585         return SMB_VFS_NEXT_LINK(handle, oldpath, newpath);
 586 }
 587
 588 static int skel_mknod(vfs_handle_struct *handle,
 589                         const struct smb_filename *smb_fname,
 590                         mode_t mode,
 591                         SMB_DEV_T dev)
 592 {
 593         return SMB_VFS_NEXT_MKNOD(handle, smb_fname, mode, dev);
 594 }
 595
 596 static char *skel_realpath(vfs_handle_struct *handle, const char *path)
 597 {
 598         return SMB_VFS_NEXT_REALPATH(handle, path);
 599 }
 600
 601 static int skel_chflags(vfs_handle_struct *handle,
 602                         const struct smb_filename *smb_fname,
 603                         uint flags)
 604 {
 605         return SMB_VFS_NEXT_CHFLAGS(handle, smb_fname, flags);
 606 }
 607
 608 static struct file_id skel_file_id_create(vfs_handle_struct *handle,
 609                                           const SMB_STRUCT_STAT *sbuf)
 610 {
 611         return SMB_VFS_NEXT_FILE_ID_CREATE(handle, sbuf);
 612 }
 613
 614 struct skel_cc_state {
 615         struct vfs_handle_struct *handle;
 616         off_t copied;
 617 };
 618 static void skel_copy_chunk_done(struct tevent_req *subreq);
 619
 620 static struct tevent_req *skel_copy_chunk_send(struct vfs_handle_struct *handle,
 621                                                TALLOC_CTX *mem_ctx,
 622                                                struct tevent_context *ev,
 623                                                struct files_struct *src_fsp,
 624                                                off_t src_off,
 625                                                struct files_struct *dest_fsp,
 626                                                off_t dest_off,
 627                                                off_t num,
 628                                                uint32_t flags)
 629 {
 630         struct tevent_req *req;
 631         struct tevent_req *subreq;
 632         struct skel_cc_state *cc_state;
 633
 634         req = tevent_req_create(mem_ctx, &cc_state, struct skel_cc_state);
 635         if (req == NULL) {
 636                 return NULL;
 637         }
 638
 639         cc_state->handle = handle;
 640         subreq = SMB_VFS_NEXT_COPY_CHUNK_SEND(handle, cc_state, ev,
 641                                               src_fsp, src_off,
 642                                               dest_fsp, dest_off, num, flags);
 643         if (tevent_req_nomem(subreq, req)) {
 644                 return tevent_req_post(req, ev);
 645         }
 646
 647         tevent_req_set_callback(subreq, skel_copy_chunk_done, req);
 648         return req;
 649 }
 650
 651 static void skel_copy_chunk_done(struct tevent_req *subreq)
 652 {
 653         struct tevent_req *req = tevent_req_callback_data(
 654                 subreq, struct tevent_req);
 655         struct skel_cc_state *cc_state
 656                         = tevent_req_data(req, struct skel_cc_state);
 657         NTSTATUS status;
 658
 659         status = SMB_VFS_NEXT_COPY_CHUNK_RECV(cc_state->handle,
 660                                               subreq,
 661                                               &cc_state->copied);
 662         TALLOC_FREE(subreq);
 663         if (tevent_req_nterror(req, status)) {
 664                 return;
 665         }
 666         tevent_req_done(req);
 667 }
 668
 669 static NTSTATUS skel_copy_chunk_recv(struct vfs_handle_struct *handle,
 670                                      struct tevent_req *req,
 671                                      off_t *copied)
 672 {
 673         struct skel_cc_state *cc_state
 674                         = tevent_req_data(req, struct skel_cc_state);
 675         NTSTATUS status;
 676
 677         *copied = cc_state->copied;
 678         if (tevent_req_is_nterror(req, &status)) {
 679                 tevent_req_received(req);
 680                 return status;
 681         }
 682
 683         tevent_req_received(req);
 684         return NT_STATUS_OK;
 685 }
 686
 687 static NTSTATUS skel_get_compression(struct vfs_handle_struct *handle,
 688                                      TALLOC_CTX *mem_ctx,
 689                                      struct files_struct *fsp,
 690                                      struct smb_filename *smb_fname,
 691                                      uint16_t *_compression_fmt)
 692 {
 693         return SMB_VFS_NEXT_GET_COMPRESSION(handle, mem_ctx, fsp, smb_fname,
 694                                             _compression_fmt);
 695 }
 696
 697 static NTSTATUS skel_set_compression(struct vfs_handle_struct *handle,
 698                                      TALLOC_CTX *mem_ctx,
 699                                      struct files_struct *fsp,
 700                                      uint16_t compression_fmt)
 701 {
 702         return SMB_VFS_NEXT_SET_COMPRESSION(handle, mem_ctx, fsp,
 703                                             compression_fmt);
 704 }
 705
 706 static NTSTATUS skel_streaminfo(struct vfs_handle_struct *handle,
 707                                 struct files_struct *fsp,
 708                                 const struct smb_filename *smb_fname,
 709                                 TALLOC_CTX *mem_ctx,
 710                                 unsigned int *num_streams,
 711                                 struct stream_struct **streams)
 712 {
 713         return SMB_VFS_NEXT_STREAMINFO(handle,
 714                                 fsp,
 715                                 smb_fname,
 716                                 mem_ctx,
 717                                 num_streams,
 718                                 streams);
 719 }
 720
 721 static int skel_get_real_filename(struct vfs_handle_struct *handle,
 722                                   const char *path,
 723                                   const char *name,
 724                                   TALLOC_CTX *mem_ctx, char **found_name)
 725 {
 726         return SMB_VFS_NEXT_GET_REAL_FILENAME(handle,
 727                                               path, name, mem_ctx, found_name);
 728 }
 729
 730 static const char *skel_connectpath(struct vfs_handle_struct *handle,
 731                                     const char *filename)
 732 {
 733         return SMB_VFS_NEXT_CONNECTPATH(handle, filename);
 734 }
 735
 736 static NTSTATUS skel_brl_lock_windows(struct vfs_handle_struct *handle,
 737                                       struct byte_range_lock *br_lck,
 738                                       struct lock_struct *plock,
 739                                       bool blocking_lock)
 740 {
 741         return SMB_VFS_NEXT_BRL_LOCK_WINDOWS(handle,
 742                                              br_lck, plock, blocking_lock);
 743 }
 744
 745 static bool skel_brl_unlock_windows(struct vfs_handle_struct *handle,
 746                                     struct messaging_context *msg_ctx,
 747                                     struct byte_range_lock *br_lck,
 748                                     const struct lock_struct *plock)
 749 {
 750         return SMB_VFS_NEXT_BRL_UNLOCK_WINDOWS(handle, msg_ctx, br_lck, plock);
 751 }
 752
 753 static bool skel_brl_cancel_windows(struct vfs_handle_struct *handle,
 754                                     struct byte_range_lock *br_lck,
 755                                     struct lock_struct *plock)
 756 {
 757         return SMB_VFS_NEXT_BRL_CANCEL_WINDOWS(handle, br_lck, plock);
 758 }
 759
 760 static bool skel_strict_lock(struct vfs_handle_struct *handle,
 761                              struct files_struct *fsp,
 762                              struct lock_struct *plock)
 763 {
 764         return SMB_VFS_NEXT_STRICT_LOCK(handle, fsp, plock);
 765 }
 766
 767 static void skel_strict_unlock(struct vfs_handle_struct *handle,
 768                                struct files_struct *fsp,
 769                                struct lock_struct *plock)
 770 {
 771         SMB_VFS_NEXT_STRICT_UNLOCK(handle, fsp, plock);
 772 }
 773
 774 static NTSTATUS skel_translate_name(struct vfs_handle_struct *handle,
 775                                     const char *mapped_name,
 776                                     enum vfs_translate_direction direction,
 777                                     TALLOC_CTX *mem_ctx, char **pmapped_name)
 778 {
 779         return SMB_VFS_NEXT_TRANSLATE_NAME(handle, mapped_name, direction,
 780                                            mem_ctx, pmapped_name);
 781 }
 782
 783 static NTSTATUS skel_fsctl(struct vfs_handle_struct *handle,
 784                            struct files_struct *fsp,
 785                            TALLOC_CTX *ctx,
 786                            uint32_t function,
 787                            uint16_t req_flags,  /* Needed for UNICODE ... */
 788                            const uint8_t *_in_data,
 789                            uint32_t in_len,
 790                            uint8_t ** _out_data,
 791                            uint32_t max_out_len, uint32_t *out_len)
 792 {
 793         return SMB_VFS_NEXT_FSCTL(handle,
 794                                   fsp,
 795                                   ctx,
 796                                   function,
 797                                   req_flags,
 798                                   _in_data,
 799                                   in_len, _out_data, max_out_len, out_len);
 800 }
 801
 802 static NTSTATUS skel_readdir_attr(struct vfs_handle_struct *handle,
 803                                   const struct smb_filename *fname,
 804                                   TALLOC_CTX *mem_ctx,
 805                                   struct readdir_attr_data **pattr_data)
 806 {
 807         return SMB_VFS_NEXT_READDIR_ATTR(handle, fname, mem_ctx, pattr_data);
 808 }
 809
 810 static NTSTATUS skel_get_dos_attributes(struct vfs_handle_struct *handle,
 811                                 struct smb_filename *smb_fname,
 812                                 uint32_t *dosmode)
 813 {
 814         return SMB_VFS_NEXT_GET_DOS_ATTRIBUTES(handle,
 815                                 smb_fname,
 816                                 dosmode);
 817 }
 818
 819 static NTSTATUS skel_fget_dos_attributes(struct vfs_handle_struct *handle,
 820                                 struct files_struct *fsp,
 821                                 uint32_t *dosmode)
 822 {
 823         return SMB_VFS_NEXT_FGET_DOS_ATTRIBUTES(handle,
 824                                 fsp,
 825                                 dosmode);
 826 }
 827
 828 static NTSTATUS skel_set_dos_attributes(struct vfs_handle_struct *handle,
 829                                 const struct smb_filename *smb_fname,
 830                                 uint32_t dosmode)
 831 {
 832         return SMB_VFS_NEXT_SET_DOS_ATTRIBUTES(handle,
 833                                 smb_fname,
 834                                 dosmode);
 835 }
 836
 837 static NTSTATUS skel_fset_dos_attributes(struct vfs_handle_struct *handle,
 838                                 struct files_struct *fsp,
 839                                 uint32_t dosmode)
 840 {
 841         return SMB_VFS_NEXT_FSET_DOS_ATTRIBUTES(handle,
 842                                 fsp,
 843                                 dosmode);
 844 }
 845
 846 static NTSTATUS skel_fget_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
 847                                  uint32_t security_info,
 848                                  TALLOC_CTX *mem_ctx,
 849                                  struct security_descriptor **ppdesc)
 850 {
 851         return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info, mem_ctx,
 852                                         ppdesc);
 853 }
 854
 855 static NTSTATUS skel_get_nt_acl(vfs_handle_struct *handle,
 856                                 const struct smb_filename *smb_fname,
 857                                 uint32_t security_info,
 858                                 TALLOC_CTX *mem_ctx,
 859                                 struct security_descriptor **ppdesc)
 860 {
 861         return SMB_VFS_NEXT_GET_NT_ACL(handle,
 862                                 smb_fname,
 863                                 security_info,
 864                                 mem_ctx,
 865                                 ppdesc);
 866 }
 867
 868 static NTSTATUS skel_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
 869                                  uint32_t security_info_sent,
 870                                  const struct security_descriptor *psd)
 871 {
 872         return SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
 873 }
 874
 875 static int skel_chmod_acl(vfs_handle_struct *handle,
 876                         const struct smb_filename *smb_fname,
 877                         mode_t mode)
 878 {
 879         return SMB_VFS_NEXT_CHMOD_ACL(handle, smb_fname, mode);
 880 }
 881
 882 static int skel_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp,
 883                            mode_t mode)
 884 {
 885         return SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 886 }
 887
 888 static SMB_ACL_T skel_sys_acl_get_file(vfs_handle_struct *handle,
 889                                        const struct smb_filename *smb_fname,
 890                                        SMB_ACL_TYPE_T type,
 891                                        TALLOC_CTX *mem_ctx)
 892 {
 893         return SMB_VFS_NEXT_SYS_ACL_GET_FILE(handle, smb_fname, type, mem_ctx);
 894 }
 895
 896 static SMB_ACL_T skel_sys_acl_get_fd(vfs_handle_struct *handle,
 897                                      files_struct *fsp, TALLOC_CTX *mem_ctx)
 898 {
 899         return SMB_VFS_NEXT_SYS_ACL_GET_FD(handle, fsp, mem_ctx);
 900 }
 901
 902 static int skel_sys_acl_blob_get_file(vfs_handle_struct *handle,
 903                                 const struct smb_filename *smb_fname,
 904                                 TALLOC_CTX *mem_ctx,
 905                                 char **blob_description,
 906                                 DATA_BLOB *blob)
 907 {
 908         return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FILE(handle, smb_fname, mem_ctx,
 909                                                   blob_description, blob);
 910 }
 911
 912 static int skel_sys_acl_blob_get_fd(vfs_handle_struct *handle,
 913                                     files_struct *fsp, TALLOC_CTX *mem_ctx,
 914                                     char **blob_description, DATA_BLOB *blob)
 915 {
 916         return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FD(handle, fsp, mem_ctx,
 917                                                 blob_description, blob);
 918 }
 919
 920 static int skel_sys_acl_set_file(vfs_handle_struct *handle,
 921                                 const struct smb_filename *smb_fname,
 922                                 SMB_ACL_TYPE_T acltype,
 923                                 SMB_ACL_T theacl)
 924 {
 925         return SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle, smb_fname,
 926                         acltype, theacl);
 927 }
 928
 929 static int skel_sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
 930                                SMB_ACL_T theacl)
 931 {
 932         return SMB_VFS_NEXT_SYS_ACL_SET_FD(handle, fsp, theacl);
 933 }
 934
 935 static int skel_sys_acl_delete_def_file(vfs_handle_struct *handle,
 936                                         const struct smb_filename *smb_fname)
 937 {
 938         return SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FILE(handle, smb_fname);
 939 }
 940
 941 static ssize_t skel_getxattr(vfs_handle_struct *handle,
 942                                 const struct smb_filename *smb_fname,
 943                                 const char *name,
 944                                 void *value,
 945                                 size_t size)
 946 {
 947         return SMB_VFS_NEXT_GETXATTR(handle, smb_fname, name, value, size);
 948 }
 949
 950 static ssize_t skel_fgetxattr(vfs_handle_struct *handle,
 951                               struct files_struct *fsp, const char *name,
 952                               void *value, size_t size)
 953 {
 954         return SMB_VFS_NEXT_FGETXATTR(handle, fsp, name, value, size);
 955 }
 956
 957 static ssize_t skel_listxattr(vfs_handle_struct *handle,
 958                                 const struct smb_filename *smb_fname,
 959                                 char *list,
 960                                 size_t size)
 961 {
 962         return SMB_VFS_NEXT_LISTXATTR(handle, smb_fname, list, size);
 963 }
 964
 965 static ssize_t skel_flistxattr(vfs_handle_struct *handle,
 966                                struct files_struct *fsp, char *list,
 967                                size_t size)
 968 {
 969         return SMB_VFS_NEXT_FLISTXATTR(handle, fsp, list, size);
 970 }
 971
 972 static int skel_removexattr(vfs_handle_struct *handle,
 973                         const struct smb_filename *smb_fname,
 974                         const char *name)
 975 {
 976         return SMB_VFS_NEXT_REMOVEXATTR(handle, smb_fname, name);
 977 }
 978
 979 static int skel_fremovexattr(vfs_handle_struct *handle,
 980                              struct files_struct *fsp, const char *name)
 981 {
 982         return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, name);
 983 }
 984
 985 static int skel_setxattr(vfs_handle_struct *handle,
 986                         const struct smb_filename *smb_fname,
 987                         const char *name,
 988                         const void *value,
 989                         size_t size,
 990                         int flags)
 991 {
 992         return SMB_VFS_NEXT_SETXATTR(handle, smb_fname,
 993                         name, value, size, flags);
 994 }
 995
 996 static int skel_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp,
 997                           const char *name, const void *value, size_t size,
 998                           int flags)
 999 {
1000         return SMB_VFS_NEXT_FSETXATTR(handle, fsp, name, value, size, flags);
1001 }
1002
1003 static bool skel_aio_force(struct vfs_handle_struct *handle,
1004                            struct files_struct *fsp)
1005 {
1006         return SMB_VFS_NEXT_AIO_FORCE(handle, fsp);
1007 }
1008
1009 /* VFS operations structure */
1010
1011 struct vfs_fn_pointers skel_transparent_fns = {
1012         /* Disk operations */
1013
1014         .connect_fn = skel_connect,
1015         .disconnect_fn = skel_disconnect,
1016         .disk_free_fn = skel_disk_free,
1017         .get_quota_fn = skel_get_quota,
1018         .set_quota_fn = skel_set_quota,
1019         .get_shadow_copy_data_fn = skel_get_shadow_copy_data,
1020         .statvfs_fn = skel_statvfs,
1021         .fs_capabilities_fn = skel_fs_capabilities,
1022         .get_dfs_referrals_fn = skel_get_dfs_referrals,
1023         .snap_check_path_fn = skel_snap_check_path,
1024         .snap_create_fn = skel_snap_create,
1025         .snap_delete_fn = skel_snap_delete,
1026
1027         /* Directory operations */
1028
1029         .opendir_fn = skel_opendir,
1030         .fdopendir_fn = skel_fdopendir,
1031         .readdir_fn = skel_readdir,
1032         .seekdir_fn = skel_seekdir,
1033         .telldir_fn = skel_telldir,
1034         .rewind_dir_fn = skel_rewind_dir,
1035         .mkdir_fn = skel_mkdir,
1036         .rmdir_fn = skel_rmdir,
1037         .closedir_fn = skel_closedir,
1038         .init_search_op_fn = skel_init_search_op,
1039
1040         /* File operations */
1041
1042         .open_fn = skel_open,
1043         .create_file_fn = skel_create_file,
1044         .close_fn = skel_close_fn,
1045         .read_fn = skel_vfs_read,
1046         .pread_fn = skel_pread,
1047         .pread_send_fn = skel_pread_send,
1048         .pread_recv_fn = skel_pread_recv,
1049         .write_fn = skel_write,
1050         .pwrite_fn = skel_pwrite,
1051         .pwrite_send_fn = skel_pwrite_send,
1052         .pwrite_recv_fn = skel_pwrite_recv,
1053         .lseek_fn = skel_lseek,
1054         .sendfile_fn = skel_sendfile,
1055         .recvfile_fn = skel_recvfile,
1056         .rename_fn = skel_rename,
1057         .fsync_fn = skel_fsync,
1058         .fsync_send_fn = skel_fsync_send,
1059         .fsync_recv_fn = skel_fsync_recv,
1060         .stat_fn = skel_stat,
1061         .fstat_fn = skel_fstat,
1062         .lstat_fn = skel_lstat,
1063         .get_alloc_size_fn = skel_get_alloc_size,
1064         .unlink_fn = skel_unlink,
1065         .chmod_fn = skel_chmod,
1066         .fchmod_fn = skel_fchmod,
1067         .chown_fn = skel_chown,
1068         .fchown_fn = skel_fchown,
1069         .lchown_fn = skel_lchown,
1070         .chdir_fn = skel_chdir,
1071         .getwd_fn = skel_getwd,
1072         .ntimes_fn = skel_ntimes,
1073         .ftruncate_fn = skel_ftruncate,
1074         .fallocate_fn = skel_fallocate,
1075         .lock_fn = skel_lock,
1076         .kernel_flock_fn = skel_kernel_flock,
1077         .linux_setlease_fn = skel_linux_setlease,
1078         .getlock_fn = skel_getlock,
1079         .symlink_fn = skel_symlink,
1080         .readlink_fn = skel_vfs_readlink,
1081         .link_fn = skel_link,
1082         .mknod_fn = skel_mknod,
1083         .realpath_fn = skel_realpath,
1084         .chflags_fn = skel_chflags,
1085         .file_id_create_fn = skel_file_id_create,
1086         .copy_chunk_send_fn = skel_copy_chunk_send,
1087         .copy_chunk_recv_fn = skel_copy_chunk_recv,
1088         .get_compression_fn = skel_get_compression,
1089         .set_compression_fn = skel_set_compression,
1090
1091         .streaminfo_fn = skel_streaminfo,
1092         .get_real_filename_fn = skel_get_real_filename,
1093         .connectpath_fn = skel_connectpath,
1094         .brl_lock_windows_fn = skel_brl_lock_windows,
1095         .brl_unlock_windows_fn = skel_brl_unlock_windows,
1096         .brl_cancel_windows_fn = skel_brl_cancel_windows,
1097         .strict_lock_fn = skel_strict_lock,
1098         .strict_unlock_fn = skel_strict_unlock,
1099         .translate_name_fn = skel_translate_name,
1100         .fsctl_fn = skel_fsctl,
1101         .readdir_attr_fn = skel_readdir_attr,
1102
1103         /* DOS attributes. */
1104         .get_dos_attributes_fn = skel_get_dos_attributes,
1105         .fget_dos_attributes_fn = skel_fget_dos_attributes,
1106         .set_dos_attributes_fn = skel_set_dos_attributes,
1107         .fset_dos_attributes_fn = skel_fset_dos_attributes,
1108
1109         /* NT ACL operations. */
1110
1111         .fget_nt_acl_fn = skel_fget_nt_acl,
1112         .get_nt_acl_fn = skel_get_nt_acl,
1113         .fset_nt_acl_fn = skel_fset_nt_acl,
1114
1115         /* POSIX ACL operations. */
1116
1117         .chmod_acl_fn = skel_chmod_acl,
1118         .fchmod_acl_fn = skel_fchmod_acl,
1119
1120         .sys_acl_get_file_fn = skel_sys_acl_get_file,
1121         .sys_acl_get_fd_fn = skel_sys_acl_get_fd,
1122         .sys_acl_blob_get_file_fn = skel_sys_acl_blob_get_file,
1123         .sys_acl_blob_get_fd_fn = skel_sys_acl_blob_get_fd,
1124         .sys_acl_set_file_fn = skel_sys_acl_set_file,
1125         .sys_acl_set_fd_fn = skel_sys_acl_set_fd,
1126         .sys_acl_delete_def_file_fn = skel_sys_acl_delete_def_file,
1127
1128         /* EA operations. */
1129         .getxattr_fn = skel_getxattr,
1130         .fgetxattr_fn = skel_fgetxattr,
1131         .listxattr_fn = skel_listxattr,
1132         .flistxattr_fn = skel_flistxattr,
1133         .removexattr_fn = skel_removexattr,
1134         .fremovexattr_fn = skel_fremovexattr,
1135         .setxattr_fn = skel_setxattr,
1136         .fsetxattr_fn = skel_fsetxattr,
1137
1138         /* aio operations */
1139         .aio_force_fn = skel_aio_force,
1140 };
1141
1142 static_decl_vfs;
1143 NTSTATUS vfs_skel_transparent_init(TALLOC_CTX *ctx)
1144 {
1145         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "skel_transparent",
1146                                 &skel_transparent_fns);
1147 }