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                                bool small_query, uint64_t *bsize,
  53                                uint64_t *dfree, uint64_t *dsize)
  54 {
  55         return SMB_VFS_NEXT_DISK_FREE(handle, path, small_query, bsize,
  56                                       dfree, dsize);
  57 }
  58
  59 static int skel_get_quota(vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype,
  60                           unid_t id, SMB_DISK_QUOTA *dq)
  61 {
  62         return SMB_VFS_NEXT_GET_QUOTA(handle, 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, const char *fname,
  99                          const char *mask, uint32 attr)
 100 {
 101         return SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
 102 }
 103
 104 static DIR *skel_fdopendir(vfs_handle_struct *handle, files_struct *fsp,
 105                            const char *mask, uint32 attr)
 106 {
 107         return SMB_VFS_NEXT_FDOPENDIR(handle, fsp, mask, attr);
 108 }
 109
 110 static struct dirent *skel_readdir(vfs_handle_struct *handle,
 111                                    DIR *dirp, SMB_STRUCT_STAT *sbuf)
 112 {
 113         return SMB_VFS_NEXT_READDIR(handle, dirp, sbuf);
 114 }
 115
 116 static void skel_seekdir(vfs_handle_struct *handle, DIR *dirp, long offset)
 117 {
 118         SMB_VFS_NEXT_SEEKDIR(handle, dirp, offset);
 119 }
 120
 121 static long skel_telldir(vfs_handle_struct *handle, DIR *dirp)
 122 {
 123         return SMB_VFS_NEXT_TELLDIR(handle, dirp);
 124 }
 125
 126 static void skel_rewind_dir(vfs_handle_struct *handle, DIR *dirp)
 127 {
 128         SMB_VFS_NEXT_REWINDDIR(handle, dirp);
 129 }
 130
 131 static int skel_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
 132 {
 133         return SMB_VFS_NEXT_MKDIR(handle, path, mode);
 134 }
 135
 136 static int skel_rmdir(vfs_handle_struct *handle, const char *path)
 137 {
 138         return SMB_VFS_NEXT_RMDIR(handle, path);
 139 }
 140
 141 static int skel_closedir(vfs_handle_struct *handle, DIR *dir)
 142 {
 143         return SMB_VFS_NEXT_CLOSEDIR(handle, dir);
 144 }
 145
 146 static void skel_init_search_op(struct vfs_handle_struct *handle, DIR *dirp)
 147 {
 148         SMB_VFS_NEXT_INIT_SEARCH_OP(handle, dirp);
 149 }
 150
 151 static int skel_open(vfs_handle_struct *handle, struct smb_filename *smb_fname,
 152                      files_struct *fsp, int flags, mode_t mode)
 153 {
 154         return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 155 }
 156
 157 static NTSTATUS skel_create_file(struct vfs_handle_struct *handle,
 158                                  struct smb_request *req,
 159                                  uint16_t root_dir_fid,
 160                                  struct smb_filename *smb_fname,
 161                                  uint32_t access_mask,
 162                                  uint32_t share_access,
 163                                  uint32_t create_disposition,
 164                                  uint32_t create_options,
 165                                  uint32_t file_attributes,
 166                                  uint32_t oplock_request,
 167                                  struct smb2_lease *lease,
 168                                  uint64_t allocation_size,
 169                                  uint32_t private_flags,
 170                                  struct security_descriptor *sd,
 171                                  struct ea_list *ea_list,
 172                                  files_struct ** result, int *pinfo)
 173 {
 174         return SMB_VFS_NEXT_CREATE_FILE(handle,
 175                                         req,
 176                                         root_dir_fid,
 177                                         smb_fname,
 178                                         access_mask,
 179                                         share_access,
 180                                         create_disposition,
 181                                         create_options,
 182                                         file_attributes,
 183                                         oplock_request,
 184                                         lease,
 185                                         allocation_size,
 186                                         private_flags,
 187                                         sd, ea_list, result, pinfo);
 188 }
 189
 190 static int skel_close_fn(vfs_handle_struct *handle, files_struct *fsp)
 191 {
 192         return SMB_VFS_NEXT_CLOSE(handle, fsp);
 193 }
 194
 195 static ssize_t skel_vfs_read(vfs_handle_struct *handle, files_struct *fsp,
 196                              void *data, size_t n)
 197 {
 198         return SMB_VFS_NEXT_READ(handle, fsp, data, n);
 199 }
 200
 201 static ssize_t skel_pread(vfs_handle_struct *handle, files_struct *fsp,
 202                           void *data, size_t n, off_t offset)
 203 {
 204         return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
 205 }
 206
 207 struct skel_pread_state {
 208         ssize_t ret;
 209         int err;
 210 };
 211
 212 static void skel_pread_done(struct tevent_req *subreq);
 213
 214 static struct tevent_req *skel_pread_send(struct vfs_handle_struct *handle,
 215                                           TALLOC_CTX *mem_ctx,
 216                                           struct tevent_context *ev,
 217                                           struct files_struct *fsp,
 218                                           void *data, size_t n, off_t offset)
 219 {
 220         struct tevent_req *req, *subreq;
 221         struct skel_pread_state *state;
 222
 223         req = tevent_req_create(mem_ctx, &state, struct skel_pread_state);
 224         if (req == NULL) {
 225                 return NULL;
 226         }
 227         subreq = SMB_VFS_NEXT_PREAD_SEND(state, ev, handle, fsp, data,
 228                                          n, offset);
 229         if (tevent_req_nomem(subreq, req)) {
 230                 return tevent_req_post(req, ev);
 231         }
 232         tevent_req_set_callback(subreq, skel_pread_done, req);
 233         return req;
 234 }
 235
 236 static void skel_pread_done(struct tevent_req *subreq)
 237 {
 238         struct tevent_req *req =
 239             tevent_req_callback_data(subreq, struct tevent_req);
 240         struct skel_pread_state *state =
 241             tevent_req_data(req, struct skel_pread_state);
 242
 243         state->ret = SMB_VFS_PREAD_RECV(subreq, &state->err);
 244         TALLOC_FREE(subreq);
 245         tevent_req_done(req);
 246 }
 247
 248 static ssize_t skel_pread_recv(struct tevent_req *req, int *err)
 249 {
 250         struct skel_pread_state *state =
 251             tevent_req_data(req, struct skel_pread_state);
 252
 253         if (tevent_req_is_unix_error(req, err)) {
 254                 return -1;
 255         }
 256         *err = state->err;
 257         return state->ret;
 258 }
 259
 260 static ssize_t skel_write(vfs_handle_struct *handle, files_struct *fsp,
 261                           const void *data, size_t n)
 262 {
 263         return SMB_VFS_NEXT_WRITE(handle, fsp, data, n);
 264 }
 265
 266 static ssize_t skel_pwrite(vfs_handle_struct *handle, files_struct *fsp,
 267                            const void *data, size_t n, off_t offset)
 268 {
 269         return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 270 }
 271
 272 struct skel_pwrite_state {
 273         ssize_t ret;
 274         int err;
 275 };
 276
 277 static void skel_pwrite_done(struct tevent_req *subreq);
 278
 279 static struct tevent_req *skel_pwrite_send(struct vfs_handle_struct *handle,
 280                                            TALLOC_CTX *mem_ctx,
 281                                            struct tevent_context *ev,
 282                                            struct files_struct *fsp,
 283                                            const void *data,
 284                                            size_t n, off_t offset)
 285 {
 286         struct tevent_req *req, *subreq;
 287         struct skel_pwrite_state *state;
 288
 289         req = tevent_req_create(mem_ctx, &state, struct skel_pwrite_state);
 290         if (req == NULL) {
 291                 return NULL;
 292         }
 293         subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp, data,
 294                                           n, offset);
 295         if (tevent_req_nomem(subreq, req)) {
 296                 return tevent_req_post(req, ev);
 297         }
 298         tevent_req_set_callback(subreq, skel_pwrite_done, req);
 299         return req;
 300 }
 301
 302 static void skel_pwrite_done(struct tevent_req *subreq)
 303 {
 304         struct tevent_req *req =
 305             tevent_req_callback_data(subreq, struct tevent_req);
 306         struct skel_pwrite_state *state =
 307             tevent_req_data(req, struct skel_pwrite_state);
 308
 309         state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->err);
 310         TALLOC_FREE(subreq);
 311         tevent_req_done(req);
 312 }
 313
 314 static ssize_t skel_pwrite_recv(struct tevent_req *req, int *err)
 315 {
 316         struct skel_pwrite_state *state =
 317             tevent_req_data(req, struct skel_pwrite_state);
 318
 319         if (tevent_req_is_unix_error(req, err)) {
 320                 return -1;
 321         }
 322         *err = state->err;
 323         return state->ret;
 324 }
 325
 326 static off_t skel_lseek(vfs_handle_struct *handle, files_struct *fsp,
 327                         off_t offset, int whence)
 328 {
 329         return SMB_VFS_NEXT_LSEEK(handle, fsp, offset, whence);
 330 }
 331
 332 static ssize_t skel_sendfile(vfs_handle_struct *handle, int tofd,
 333                              files_struct *fromfsp, const DATA_BLOB *hdr,
 334                              off_t offset, size_t n)
 335 {
 336         return SMB_VFS_NEXT_SENDFILE(handle, tofd, fromfsp, hdr, offset, n);
 337 }
 338
 339 static ssize_t skel_recvfile(vfs_handle_struct *handle, int fromfd,
 340                              files_struct *tofsp, off_t offset, size_t n)
 341 {
 342         return SMB_VFS_NEXT_RECVFILE(handle, fromfd, tofsp, offset, n);
 343 }
 344
 345 static int skel_rename(vfs_handle_struct *handle,
 346                        const struct smb_filename *smb_fname_src,
 347                        const struct smb_filename *smb_fname_dst)
 348 {
 349         return SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 350 }
 351
 352 static int skel_fsync(vfs_handle_struct *handle, files_struct *fsp)
 353 {
 354         return SMB_VFS_NEXT_FSYNC(handle, fsp);
 355 }
 356
 357 struct skel_fsync_state {
 358         int ret;
 359         int err;
 360 };
 361
 362 static void skel_fsync_done(struct tevent_req *subreq);
 363
 364 static struct tevent_req *skel_fsync_send(struct vfs_handle_struct *handle,
 365                                           TALLOC_CTX *mem_ctx,
 366                                           struct tevent_context *ev,
 367                                           struct files_struct *fsp)
 368 {
 369         struct tevent_req *req, *subreq;
 370         struct skel_fsync_state *state;
 371
 372         req = tevent_req_create(mem_ctx, &state, struct skel_fsync_state);
 373         if (req == NULL) {
 374                 return NULL;
 375         }
 376         subreq = SMB_VFS_NEXT_FSYNC_SEND(state, ev, handle, fsp);
 377         if (tevent_req_nomem(subreq, req)) {
 378                 return tevent_req_post(req, ev);
 379         }
 380         tevent_req_set_callback(subreq, skel_fsync_done, req);
 381         return req;
 382 }
 383
 384 static void skel_fsync_done(struct tevent_req *subreq)
 385 {
 386         struct tevent_req *req =
 387             tevent_req_callback_data(subreq, struct tevent_req);
 388         struct skel_fsync_state *state =
 389             tevent_req_data(req, struct skel_fsync_state);
 390
 391         state->ret = SMB_VFS_FSYNC_RECV(subreq, &state->err);
 392         TALLOC_FREE(subreq);
 393         tevent_req_done(req);
 394 }
 395
 396 static int skel_fsync_recv(struct tevent_req *req, int *err)
 397 {
 398         struct skel_fsync_state *state =
 399             tevent_req_data(req, struct skel_fsync_state);
 400
 401         if (tevent_req_is_unix_error(req, err)) {
 402                 return -1;
 403         }
 404         *err = state->err;
 405         return state->ret;
 406 }
 407
 408 static int skel_stat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
 409 {
 410         return SMB_VFS_NEXT_STAT(handle, smb_fname);
 411 }
 412
 413 static int skel_fstat(vfs_handle_struct *handle, files_struct *fsp,
 414                       SMB_STRUCT_STAT *sbuf)
 415 {
 416         return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
 417 }
 418
 419 static int skel_lstat(vfs_handle_struct *handle,
 420                       struct smb_filename *smb_fname)
 421 {
 422         return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
 423 }
 424
 425 static uint64_t skel_get_alloc_size(struct vfs_handle_struct *handle,
 426                                     struct files_struct *fsp,
 427                                     const SMB_STRUCT_STAT *sbuf)
 428 {
 429         return SMB_VFS_NEXT_GET_ALLOC_SIZE(handle, fsp, sbuf);
 430 }
 431
 432 static int skel_unlink(vfs_handle_struct *handle,
 433                        const struct smb_filename *smb_fname)
 434 {
 435         return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 436 }
 437
 438 static int skel_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 439 {
 440         return SMB_VFS_NEXT_CHMOD(handle, path, mode);
 441 }
 442
 443 static int skel_fchmod(vfs_handle_struct *handle, files_struct *fsp,
 444                        mode_t mode)
 445 {
 446         return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 447 }
 448
 449 static int skel_chown(vfs_handle_struct *handle, const char *path, uid_t uid,
 450                       gid_t gid)
 451 {
 452         return SMB_VFS_NEXT_CHOWN(handle, path, uid, gid);
 453 }
 454
 455 static int skel_fchown(vfs_handle_struct *handle, files_struct *fsp,
 456                        uid_t uid, gid_t gid)
 457 {
 458         return SMB_VFS_NEXT_FCHOWN(handle, fsp, uid, gid);
 459 }
 460
 461 static int skel_lchown(vfs_handle_struct *handle, const char *path, uid_t uid,
 462                        gid_t gid)
 463 {
 464         return SMB_VFS_NEXT_LCHOWN(handle, path, uid, gid);
 465 }
 466
 467 static int skel_chdir(vfs_handle_struct *handle, const char *path)
 468 {
 469         return SMB_VFS_NEXT_CHDIR(handle, path);
 470 }
 471
 472 static char *skel_getwd(vfs_handle_struct *handle)
 473 {
 474         return SMB_VFS_NEXT_GETWD(handle);
 475 }
 476
 477 static int skel_ntimes(vfs_handle_struct *handle,
 478                        const struct smb_filename *smb_fname,
 479                        struct smb_file_time *ft)
 480 {
 481         return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft);
 482 }
 483
 484 static int skel_ftruncate(vfs_handle_struct *handle, files_struct *fsp,
 485                           off_t offset)
 486 {
 487         return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
 488 }
 489
 490 static int skel_fallocate(vfs_handle_struct *handle, files_struct *fsp,
 491                           enum vfs_fallocate_mode mode, off_t offset, off_t len)
 492 {
 493         return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
 494 }
 495
 496 static bool skel_lock(vfs_handle_struct *handle, files_struct *fsp, int op,
 497                       off_t offset, off_t count, int type)
 498 {
 499         return SMB_VFS_NEXT_LOCK(handle, fsp, op, offset, count, type);
 500 }
 501
 502 static int skel_kernel_flock(struct vfs_handle_struct *handle,
 503                              struct files_struct *fsp, uint32 share_mode,
 504                              uint32 access_mask)
 505 {
 506         return SMB_VFS_NEXT_KERNEL_FLOCK(handle, fsp, share_mode, access_mask);
 507 }
 508
 509 static int skel_linux_setlease(struct vfs_handle_struct *handle,
 510                                struct files_struct *fsp, int leasetype)
 511 {
 512         return SMB_VFS_NEXT_LINUX_SETLEASE(handle, fsp, leasetype);
 513 }
 514
 515 static bool skel_getlock(vfs_handle_struct *handle, files_struct *fsp,
 516                          off_t *poffset, off_t *pcount, int *ptype,
 517                          pid_t *ppid)
 518 {
 519         return SMB_VFS_NEXT_GETLOCK(handle, fsp, poffset, pcount, ptype, ppid);
 520 }
 521
 522 static int skel_symlink(vfs_handle_struct *handle, const char *oldpath,
 523                         const char *newpath)
 524 {
 525         return SMB_VFS_NEXT_SYMLINK(handle, oldpath, newpath);
 526 }
 527
 528 static int skel_vfs_readlink(vfs_handle_struct *handle, const char *path,
 529                              char *buf, size_t bufsiz)
 530 {
 531         return SMB_VFS_NEXT_READLINK(handle, path, buf, bufsiz);
 532 }
 533
 534 static int skel_link(vfs_handle_struct *handle, const char *oldpath,
 535                      const char *newpath)
 536 {
 537         return SMB_VFS_NEXT_LINK(handle, oldpath, newpath);
 538 }
 539
 540 static int skel_mknod(vfs_handle_struct *handle, const char *path, mode_t mode,
 541                       SMB_DEV_T dev)
 542 {
 543         return SMB_VFS_NEXT_MKNOD(handle, path, mode, dev);
 544 }
 545
 546 static char *skel_realpath(vfs_handle_struct *handle, const char *path)
 547 {
 548         return SMB_VFS_NEXT_REALPATH(handle, path);
 549 }
 550
 551 static NTSTATUS skel_notify_watch(struct vfs_handle_struct *handle,
 552                                   struct sys_notify_context *ctx,
 553                                   const char *path,
 554                                   uint32_t *filter,
 555                                   uint32_t *subdir_filter,
 556                                   void (*callback) (struct sys_notify_context *ctx,
 557                                                     void *private_data,
 558                                                     struct notify_event *ev),
 559                                   void *private_data, void *handle_p)
 560 {
 561         return SMB_VFS_NEXT_NOTIFY_WATCH(handle, ctx, path,
 562                                          filter, subdir_filter, callback,
 563                                          private_data, handle_p);
 564 }
 565
 566 static int skel_chflags(vfs_handle_struct *handle, const char *path,
 567                         uint flags)
 568 {
 569         return SMB_VFS_NEXT_CHFLAGS(handle, path, flags);
 570 }
 571
 572 static struct file_id skel_file_id_create(vfs_handle_struct *handle,
 573                                           const SMB_STRUCT_STAT *sbuf)
 574 {
 575         return SMB_VFS_NEXT_FILE_ID_CREATE(handle, sbuf);
 576 }
 577
 578 struct skel_cc_state {
 579         struct vfs_handle_struct *handle;
 580         off_t copied;
 581 };
 582 static void skel_copy_chunk_done(struct tevent_req *subreq);
 583
 584 static struct tevent_req *skel_copy_chunk_send(struct vfs_handle_struct *handle,
 585                                                TALLOC_CTX *mem_ctx,
 586                                                struct tevent_context *ev,
 587                                                struct files_struct *src_fsp,
 588                                                off_t src_off,
 589                                                struct files_struct *dest_fsp,
 590                                                off_t dest_off,
 591                                                off_t num)
 592 {
 593         struct tevent_req *req;
 594         struct tevent_req *subreq;
 595         struct skel_cc_state *cc_state;
 596
 597         req = tevent_req_create(mem_ctx, &cc_state, struct skel_cc_state);
 598         if (req == NULL) {
 599                 return NULL;
 600         }
 601
 602         cc_state->handle = handle;
 603         subreq = SMB_VFS_NEXT_COPY_CHUNK_SEND(handle, cc_state, ev,
 604                                               src_fsp, src_off,
 605                                               dest_fsp, dest_off, num);
 606         if (tevent_req_nomem(subreq, req)) {
 607                 return tevent_req_post(req, ev);
 608         }
 609
 610         tevent_req_set_callback(subreq, skel_copy_chunk_done, req);
 611         return req;
 612 }
 613
 614 static void skel_copy_chunk_done(struct tevent_req *subreq)
 615 {
 616         struct tevent_req *req = tevent_req_callback_data(
 617                 subreq, struct tevent_req);
 618         struct skel_cc_state *cc_state
 619                         = tevent_req_data(req, struct skel_cc_state);
 620         NTSTATUS status;
 621
 622         status = SMB_VFS_NEXT_COPY_CHUNK_RECV(cc_state->handle,
 623                                               subreq,
 624                                               &cc_state->copied);
 625         TALLOC_FREE(subreq);
 626         if (tevent_req_nterror(req, status)) {
 627                 return;
 628         }
 629         tevent_req_done(req);
 630 }
 631
 632 static NTSTATUS skel_copy_chunk_recv(struct vfs_handle_struct *handle,
 633                                      struct tevent_req *req,
 634                                      off_t *copied)
 635 {
 636         struct skel_cc_state *cc_state
 637                         = tevent_req_data(req, struct skel_cc_state);
 638         NTSTATUS status;
 639
 640         *copied = cc_state->copied;
 641         if (tevent_req_is_nterror(req, &status)) {
 642                 tevent_req_received(req);
 643                 return status;
 644         }
 645
 646         tevent_req_received(req);
 647         return NT_STATUS_OK;
 648 }
 649
 650 static NTSTATUS skel_get_compression(struct vfs_handle_struct *handle,
 651                                      TALLOC_CTX *mem_ctx,
 652                                      struct files_struct *fsp,
 653                                      struct smb_filename *smb_fname,
 654                                      uint16_t *_compression_fmt)
 655 {
 656         return SMB_VFS_NEXT_GET_COMPRESSION(handle, mem_ctx, fsp, smb_fname,
 657                                             _compression_fmt);
 658 }
 659
 660 static NTSTATUS skel_set_compression(struct vfs_handle_struct *handle,
 661                                      TALLOC_CTX *mem_ctx,
 662                                      struct files_struct *fsp,
 663                                      uint16_t compression_fmt)
 664 {
 665         return SMB_VFS_NEXT_SET_COMPRESSION(handle, mem_ctx, fsp,
 666                                             compression_fmt);
 667 }
 668
 669 static NTSTATUS skel_streaminfo(struct vfs_handle_struct *handle,
 670                                 struct files_struct *fsp,
 671                                 const char *fname,
 672                                 TALLOC_CTX *mem_ctx,
 673                                 unsigned int *num_streams,
 674                                 struct stream_struct **streams)
 675 {
 676         return SMB_VFS_NEXT_STREAMINFO(handle,
 677                                        fsp,
 678                                        fname, mem_ctx, num_streams, streams);
 679 }
 680
 681 static int skel_get_real_filename(struct vfs_handle_struct *handle,
 682                                   const char *path,
 683                                   const char *name,
 684                                   TALLOC_CTX *mem_ctx, char **found_name)
 685 {
 686         return SMB_VFS_NEXT_GET_REAL_FILENAME(handle,
 687                                               path, name, mem_ctx, found_name);
 688 }
 689
 690 static const char *skel_connectpath(struct vfs_handle_struct *handle,
 691                                     const char *filename)
 692 {
 693         return SMB_VFS_NEXT_CONNECTPATH(handle, filename);
 694 }
 695
 696 static NTSTATUS skel_brl_lock_windows(struct vfs_handle_struct *handle,
 697                                       struct byte_range_lock *br_lck,
 698                                       struct lock_struct *plock,
 699                                       bool blocking_lock)
 700 {
 701         return SMB_VFS_NEXT_BRL_LOCK_WINDOWS(handle,
 702                                              br_lck, plock, blocking_lock);
 703 }
 704
 705 static bool skel_brl_unlock_windows(struct vfs_handle_struct *handle,
 706                                     struct messaging_context *msg_ctx,
 707                                     struct byte_range_lock *br_lck,
 708                                     const struct lock_struct *plock)
 709 {
 710         return SMB_VFS_NEXT_BRL_UNLOCK_WINDOWS(handle, msg_ctx, br_lck, plock);
 711 }
 712
 713 static bool skel_brl_cancel_windows(struct vfs_handle_struct *handle,
 714                                     struct byte_range_lock *br_lck,
 715                                     struct lock_struct *plock)
 716 {
 717         return SMB_VFS_NEXT_BRL_CANCEL_WINDOWS(handle, br_lck, plock);
 718 }
 719
 720 static bool skel_strict_lock(struct vfs_handle_struct *handle,
 721                              struct files_struct *fsp,
 722                              struct lock_struct *plock)
 723 {
 724         return SMB_VFS_NEXT_STRICT_LOCK(handle, fsp, plock);
 725 }
 726
 727 static void skel_strict_unlock(struct vfs_handle_struct *handle,
 728                                struct files_struct *fsp,
 729                                struct lock_struct *plock)
 730 {
 731         SMB_VFS_NEXT_STRICT_UNLOCK(handle, fsp, plock);
 732 }
 733
 734 static NTSTATUS skel_translate_name(struct vfs_handle_struct *handle,
 735                                     const char *mapped_name,
 736                                     enum vfs_translate_direction direction,
 737                                     TALLOC_CTX *mem_ctx, char **pmapped_name)
 738 {
 739         return SMB_VFS_NEXT_TRANSLATE_NAME(handle, mapped_name, direction,
 740                                            mem_ctx, pmapped_name);
 741 }
 742
 743 static NTSTATUS skel_fsctl(struct vfs_handle_struct *handle,
 744                            struct files_struct *fsp,
 745                            TALLOC_CTX *ctx,
 746                            uint32_t function,
 747                            uint16_t req_flags,  /* Needed for UNICODE ... */
 748                            const uint8_t *_in_data,
 749                            uint32_t in_len,
 750                            uint8_t ** _out_data,
 751                            uint32_t max_out_len, uint32_t *out_len)
 752 {
 753         return SMB_VFS_NEXT_FSCTL(handle,
 754                                   fsp,
 755                                   ctx,
 756                                   function,
 757                                   req_flags,
 758                                   _in_data,
 759                                   in_len, _out_data, max_out_len, out_len);
 760 }
 761
 762 static NTSTATUS skel_readdir_attr(struct vfs_handle_struct *handle,
 763                                   const struct smb_filename *fname,
 764                                   TALLOC_CTX *mem_ctx,
 765                                   struct readdir_attr_data **pattr_data)
 766 {
 767         return SMB_VFS_NEXT_READDIR_ATTR(handle, fname, mem_ctx, pattr_data);
 768 }
 769
 770 static NTSTATUS skel_fget_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
 771                                  uint32 security_info,
 772                                  TALLOC_CTX *mem_ctx,
 773                                  struct security_descriptor **ppdesc)
 774 {
 775         return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info, mem_ctx,
 776                                         ppdesc);
 777 }
 778
 779 static NTSTATUS skel_get_nt_acl(vfs_handle_struct *handle,
 780                                 const char *name, uint32 security_info,
 781                                 TALLOC_CTX *mem_ctx,
 782                                 struct security_descriptor **ppdesc)
 783 {
 784         return SMB_VFS_NEXT_GET_NT_ACL(handle, name, security_info, mem_ctx,
 785                                        ppdesc);
 786 }
 787
 788 static NTSTATUS skel_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
 789                                  uint32 security_info_sent,
 790                                  const struct security_descriptor *psd)
 791 {
 792         return SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
 793 }
 794
 795 static int skel_chmod_acl(vfs_handle_struct *handle, const char *name,
 796                           mode_t mode)
 797 {
 798         return SMB_VFS_NEXT_CHMOD_ACL(handle, name, mode);
 799 }
 800
 801 static int skel_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp,
 802                            mode_t mode)
 803 {
 804         return SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 805 }
 806
 807 static SMB_ACL_T skel_sys_acl_get_file(vfs_handle_struct *handle,
 808                                        const char *path_p,
 809                                        SMB_ACL_TYPE_T type,
 810                                        TALLOC_CTX *mem_ctx)
 811 {
 812         return SMB_VFS_NEXT_SYS_ACL_GET_FILE(handle, path_p, type, mem_ctx);
 813 }
 814
 815 static SMB_ACL_T skel_sys_acl_get_fd(vfs_handle_struct *handle,
 816                                      files_struct *fsp, TALLOC_CTX *mem_ctx)
 817 {
 818         return SMB_VFS_NEXT_SYS_ACL_GET_FD(handle, fsp, mem_ctx);
 819 }
 820
 821 static int skel_sys_acl_blob_get_file(vfs_handle_struct *handle,
 822                                       const char *path_p, TALLOC_CTX *mem_ctx,
 823                                       char **blob_description, DATA_BLOB *blob)
 824 {
 825         return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FILE(handle, path_p, mem_ctx,
 826                                                   blob_description, blob);
 827 }
 828
 829 static int skel_sys_acl_blob_get_fd(vfs_handle_struct *handle,
 830                                     files_struct *fsp, TALLOC_CTX *mem_ctx,
 831                                     char **blob_description, DATA_BLOB *blob)
 832 {
 833         return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FD(handle, fsp, mem_ctx,
 834                                                 blob_description, blob);
 835 }
 836
 837 static int skel_sys_acl_set_file(vfs_handle_struct *handle, const char *name,
 838                                  SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
 839 {
 840         return SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle, name, acltype, theacl);
 841 }
 842
 843 static int skel_sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
 844                                SMB_ACL_T theacl)
 845 {
 846         return SMB_VFS_NEXT_SYS_ACL_SET_FD(handle, fsp, theacl);
 847 }
 848
 849 static int skel_sys_acl_delete_def_file(vfs_handle_struct *handle,
 850                                         const char *path)
 851 {
 852         return SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FILE(handle, path);
 853 }
 854
 855 static ssize_t skel_getxattr(vfs_handle_struct *handle, const char *path,
 856                              const char *name, void *value, size_t size)
 857 {
 858         return SMB_VFS_NEXT_GETXATTR(handle, path, name, value, size);
 859 }
 860
 861 static ssize_t skel_fgetxattr(vfs_handle_struct *handle,
 862                               struct files_struct *fsp, const char *name,
 863                               void *value, size_t size)
 864 {
 865         return SMB_VFS_NEXT_FGETXATTR(handle, fsp, name, value, size);
 866 }
 867
 868 static ssize_t skel_listxattr(vfs_handle_struct *handle, const char *path,
 869                               char *list, size_t size)
 870 {
 871         return SMB_VFS_NEXT_LISTXATTR(handle, path, list, size);
 872 }
 873
 874 static ssize_t skel_flistxattr(vfs_handle_struct *handle,
 875                                struct files_struct *fsp, char *list,
 876                                size_t size)
 877 {
 878         return SMB_VFS_NEXT_FLISTXATTR(handle, fsp, list, size);
 879 }
 880
 881 static int skel_removexattr(vfs_handle_struct *handle, const char *path,
 882                             const char *name)
 883 {
 884         return SMB_VFS_NEXT_REMOVEXATTR(handle, path, name);
 885 }
 886
 887 static int skel_fremovexattr(vfs_handle_struct *handle,
 888                              struct files_struct *fsp, const char *name)
 889 {
 890         return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, name);
 891 }
 892
 893 static int skel_setxattr(vfs_handle_struct *handle, const char *path,
 894                          const char *name, const void *value, size_t size,
 895                          int flags)
 896 {
 897         return SMB_VFS_NEXT_SETXATTR(handle, path, name, value, size, flags);
 898 }
 899
 900 static int skel_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp,
 901                           const char *name, const void *value, size_t size,
 902                           int flags)
 903 {
 904         return SMB_VFS_NEXT_FSETXATTR(handle, fsp, name, value, size, flags);
 905 }
 906
 907 static bool skel_aio_force(struct vfs_handle_struct *handle,
 908                            struct files_struct *fsp)
 909 {
 910         return SMB_VFS_NEXT_AIO_FORCE(handle, fsp);
 911 }
 912
 913 static bool skel_is_offline(struct vfs_handle_struct *handle,
 914                             const struct smb_filename *fname,
 915                             SMB_STRUCT_STAT *sbuf)
 916 {
 917         return SMB_VFS_NEXT_IS_OFFLINE(handle, fname, sbuf);
 918 }
 919
 920 static int skel_set_offline(struct vfs_handle_struct *handle,
 921                             const struct smb_filename *fname)
 922 {
 923         return SMB_VFS_NEXT_SET_OFFLINE(handle, fname);
 924 }
 925
 926 /* VFS operations structure */
 927
 928 struct vfs_fn_pointers skel_transparent_fns = {
 929         /* Disk operations */
 930
 931         .connect_fn = skel_connect,
 932         .disconnect_fn = skel_disconnect,
 933         .disk_free_fn = skel_disk_free,
 934         .get_quota_fn = skel_get_quota,
 935         .set_quota_fn = skel_set_quota,
 936         .get_shadow_copy_data_fn = skel_get_shadow_copy_data,
 937         .statvfs_fn = skel_statvfs,
 938         .fs_capabilities_fn = skel_fs_capabilities,
 939         .get_dfs_referrals_fn = skel_get_dfs_referrals,
 940
 941         /* Directory operations */
 942
 943         .opendir_fn = skel_opendir,
 944         .fdopendir_fn = skel_fdopendir,
 945         .readdir_fn = skel_readdir,
 946         .seekdir_fn = skel_seekdir,
 947         .telldir_fn = skel_telldir,
 948         .rewind_dir_fn = skel_rewind_dir,
 949         .mkdir_fn = skel_mkdir,
 950         .rmdir_fn = skel_rmdir,
 951         .closedir_fn = skel_closedir,
 952         .init_search_op_fn = skel_init_search_op,
 953
 954         /* File operations */
 955
 956         .open_fn = skel_open,
 957         .create_file_fn = skel_create_file,
 958         .close_fn = skel_close_fn,
 959         .read_fn = skel_vfs_read,
 960         .pread_fn = skel_pread,
 961         .pread_send_fn = skel_pread_send,
 962         .pread_recv_fn = skel_pread_recv,
 963         .write_fn = skel_write,
 964         .pwrite_fn = skel_pwrite,
 965         .pwrite_send_fn = skel_pwrite_send,
 966         .pwrite_recv_fn = skel_pwrite_recv,
 967         .lseek_fn = skel_lseek,
 968         .sendfile_fn = skel_sendfile,
 969         .recvfile_fn = skel_recvfile,
 970         .rename_fn = skel_rename,
 971         .fsync_fn = skel_fsync,
 972         .fsync_send_fn = skel_fsync_send,
 973         .fsync_recv_fn = skel_fsync_recv,
 974         .stat_fn = skel_stat,
 975         .fstat_fn = skel_fstat,
 976         .lstat_fn = skel_lstat,
 977         .get_alloc_size_fn = skel_get_alloc_size,
 978         .unlink_fn = skel_unlink,
 979         .chmod_fn = skel_chmod,
 980         .fchmod_fn = skel_fchmod,
 981         .chown_fn = skel_chown,
 982         .fchown_fn = skel_fchown,
 983         .lchown_fn = skel_lchown,
 984         .chdir_fn = skel_chdir,
 985         .getwd_fn = skel_getwd,
 986         .ntimes_fn = skel_ntimes,
 987         .ftruncate_fn = skel_ftruncate,
 988         .fallocate_fn = skel_fallocate,
 989         .lock_fn = skel_lock,
 990         .kernel_flock_fn = skel_kernel_flock,
 991         .linux_setlease_fn = skel_linux_setlease,
 992         .getlock_fn = skel_getlock,
 993         .symlink_fn = skel_symlink,
 994         .readlink_fn = skel_vfs_readlink,
 995         .link_fn = skel_link,
 996         .mknod_fn = skel_mknod,
 997         .realpath_fn = skel_realpath,
 998         .notify_watch_fn = skel_notify_watch,
 999         .chflags_fn = skel_chflags,
1000         .file_id_create_fn = skel_file_id_create,
1001         .copy_chunk_send_fn = skel_copy_chunk_send,
1002         .copy_chunk_recv_fn = skel_copy_chunk_recv,
1003         .get_compression_fn = skel_get_compression,
1004         .set_compression_fn = skel_set_compression,
1005
1006         .streaminfo_fn = skel_streaminfo,
1007         .get_real_filename_fn = skel_get_real_filename,
1008         .connectpath_fn = skel_connectpath,
1009         .brl_lock_windows_fn = skel_brl_lock_windows,
1010         .brl_unlock_windows_fn = skel_brl_unlock_windows,
1011         .brl_cancel_windows_fn = skel_brl_cancel_windows,
1012         .strict_lock_fn = skel_strict_lock,
1013         .strict_unlock_fn = skel_strict_unlock,
1014         .translate_name_fn = skel_translate_name,
1015         .fsctl_fn = skel_fsctl,
1016         .readdir_attr_fn = skel_readdir_attr,
1017
1018         /* NT ACL operations. */
1019
1020         .fget_nt_acl_fn = skel_fget_nt_acl,
1021         .get_nt_acl_fn = skel_get_nt_acl,
1022         .fset_nt_acl_fn = skel_fset_nt_acl,
1023
1024         /* POSIX ACL operations. */
1025
1026         .chmod_acl_fn = skel_chmod_acl,
1027         .fchmod_acl_fn = skel_fchmod_acl,
1028
1029         .sys_acl_get_file_fn = skel_sys_acl_get_file,
1030         .sys_acl_get_fd_fn = skel_sys_acl_get_fd,
1031         .sys_acl_blob_get_file_fn = skel_sys_acl_blob_get_file,
1032         .sys_acl_blob_get_fd_fn = skel_sys_acl_blob_get_fd,
1033         .sys_acl_set_file_fn = skel_sys_acl_set_file,
1034         .sys_acl_set_fd_fn = skel_sys_acl_set_fd,
1035         .sys_acl_delete_def_file_fn = skel_sys_acl_delete_def_file,
1036
1037         /* EA operations. */
1038         .getxattr_fn = skel_getxattr,
1039         .fgetxattr_fn = skel_fgetxattr,
1040         .listxattr_fn = skel_listxattr,
1041         .flistxattr_fn = skel_flistxattr,
1042         .removexattr_fn = skel_removexattr,
1043         .fremovexattr_fn = skel_fremovexattr,
1044         .setxattr_fn = skel_setxattr,
1045         .fsetxattr_fn = skel_fsetxattr,
1046
1047         /* aio operations */
1048         .aio_force_fn = skel_aio_force,
1049
1050         /* offline operations */
1051         .is_offline_fn = skel_is_offline,
1052         .set_offline_fn = skel_set_offline
1053 };
1054
1055 NTSTATUS vfs_skel_transparent_init(void)
1056 {
1057         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "skel_transparent",
1058                                 &skel_transparent_fns);
1059 }