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