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