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                                  const struct smb2_create_blobs *in_context_blobs,
 174                                  struct smb2_create_blobs *out_context_blobs)
 175 {
 176         return SMB_VFS_NEXT_CREATE_FILE(handle,
 177                                         req,
 178                                         root_dir_fid,
 179                                         smb_fname,
 180                                         access_mask,
 181                                         share_access,
 182                                         create_disposition,
 183                                         create_options,
 184                                         file_attributes,
 185                                         oplock_request,
 186                                         lease,
 187                                         allocation_size,
 188                                         private_flags,
 189                                         sd, ea_list, result, pinfo,
 190                                         in_context_blobs, out_context_blobs);
 191 }
 192
 193 static int skel_close_fn(vfs_handle_struct *handle, files_struct *fsp)
 194 {
 195         return SMB_VFS_NEXT_CLOSE(handle, fsp);
 196 }
 197
 198 static ssize_t skel_vfs_read(vfs_handle_struct *handle, files_struct *fsp,
 199                              void *data, size_t n)
 200 {
 201         return SMB_VFS_NEXT_READ(handle, fsp, data, n);
 202 }
 203
 204 static ssize_t skel_pread(vfs_handle_struct *handle, files_struct *fsp,
 205                           void *data, size_t n, off_t offset)
 206 {
 207         return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
 208 }
 209
 210 struct skel_pread_state {
 211         ssize_t ret;
 212         int err;
 213 };
 214
 215 static void skel_pread_done(struct tevent_req *subreq);
 216
 217 static struct tevent_req *skel_pread_send(struct vfs_handle_struct *handle,
 218                                           TALLOC_CTX *mem_ctx,
 219                                           struct tevent_context *ev,
 220                                           struct files_struct *fsp,
 221                                           void *data, size_t n, off_t offset)
 222 {
 223         struct tevent_req *req, *subreq;
 224         struct skel_pread_state *state;
 225
 226         req = tevent_req_create(mem_ctx, &state, struct skel_pread_state);
 227         if (req == NULL) {
 228                 return NULL;
 229         }
 230         subreq = SMB_VFS_NEXT_PREAD_SEND(state, ev, handle, fsp, data,
 231                                          n, offset);
 232         if (tevent_req_nomem(subreq, req)) {
 233                 return tevent_req_post(req, ev);
 234         }
 235         tevent_req_set_callback(subreq, skel_pread_done, req);
 236         return req;
 237 }
 238
 239 static void skel_pread_done(struct tevent_req *subreq)
 240 {
 241         struct tevent_req *req =
 242             tevent_req_callback_data(subreq, struct tevent_req);
 243         struct skel_pread_state *state =
 244             tevent_req_data(req, struct skel_pread_state);
 245
 246         state->ret = SMB_VFS_PREAD_RECV(subreq, &state->err);
 247         TALLOC_FREE(subreq);
 248         tevent_req_done(req);
 249 }
 250
 251 static ssize_t skel_pread_recv(struct tevent_req *req, int *err)
 252 {
 253         struct skel_pread_state *state =
 254             tevent_req_data(req, struct skel_pread_state);
 255
 256         if (tevent_req_is_unix_error(req, err)) {
 257                 return -1;
 258         }
 259         *err = state->err;
 260         return state->ret;
 261 }
 262
 263 static ssize_t skel_write(vfs_handle_struct *handle, files_struct *fsp,
 264                           const void *data, size_t n)
 265 {
 266         return SMB_VFS_NEXT_WRITE(handle, fsp, data, n);
 267 }
 268
 269 static ssize_t skel_pwrite(vfs_handle_struct *handle, files_struct *fsp,
 270                            const void *data, size_t n, off_t offset)
 271 {
 272         return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 273 }
 274
 275 struct skel_pwrite_state {
 276         ssize_t ret;
 277         int err;
 278 };
 279
 280 static void skel_pwrite_done(struct tevent_req *subreq);
 281
 282 static struct tevent_req *skel_pwrite_send(struct vfs_handle_struct *handle,
 283                                            TALLOC_CTX *mem_ctx,
 284                                            struct tevent_context *ev,
 285                                            struct files_struct *fsp,
 286                                            const void *data,
 287                                            size_t n, off_t offset)
 288 {
 289         struct tevent_req *req, *subreq;
 290         struct skel_pwrite_state *state;
 291
 292         req = tevent_req_create(mem_ctx, &state, struct skel_pwrite_state);
 293         if (req == NULL) {
 294                 return NULL;
 295         }
 296         subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp, data,
 297                                           n, offset);
 298         if (tevent_req_nomem(subreq, req)) {
 299                 return tevent_req_post(req, ev);
 300         }
 301         tevent_req_set_callback(subreq, skel_pwrite_done, req);
 302         return req;
 303 }
 304
 305 static void skel_pwrite_done(struct tevent_req *subreq)
 306 {
 307         struct tevent_req *req =
 308             tevent_req_callback_data(subreq, struct tevent_req);
 309         struct skel_pwrite_state *state =
 310             tevent_req_data(req, struct skel_pwrite_state);
 311
 312         state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->err);
 313         TALLOC_FREE(subreq);
 314         tevent_req_done(req);
 315 }
 316
 317 static ssize_t skel_pwrite_recv(struct tevent_req *req, int *err)
 318 {
 319         struct skel_pwrite_state *state =
 320             tevent_req_data(req, struct skel_pwrite_state);
 321
 322         if (tevent_req_is_unix_error(req, err)) {
 323                 return -1;
 324         }
 325         *err = state->err;
 326         return state->ret;
 327 }
 328
 329 static off_t skel_lseek(vfs_handle_struct *handle, files_struct *fsp,
 330                         off_t offset, int whence)
 331 {
 332         return SMB_VFS_NEXT_LSEEK(handle, fsp, offset, whence);
 333 }
 334
 335 static ssize_t skel_sendfile(vfs_handle_struct *handle, int tofd,
 336                              files_struct *fromfsp, const DATA_BLOB *hdr,
 337                              off_t offset, size_t n)
 338 {
 339         return SMB_VFS_NEXT_SENDFILE(handle, tofd, fromfsp, hdr, offset, n);
 340 }
 341
 342 static ssize_t skel_recvfile(vfs_handle_struct *handle, int fromfd,
 343                              files_struct *tofsp, off_t offset, size_t n)
 344 {
 345         return SMB_VFS_NEXT_RECVFILE(handle, fromfd, tofsp, offset, n);
 346 }
 347
 348 static int skel_rename(vfs_handle_struct *handle,
 349                        const struct smb_filename *smb_fname_src,
 350                        const struct smb_filename *smb_fname_dst)
 351 {
 352         return SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 353 }
 354
 355 static int skel_fsync(vfs_handle_struct *handle, files_struct *fsp)
 356 {
 357         return SMB_VFS_NEXT_FSYNC(handle, fsp);
 358 }
 359
 360 struct skel_fsync_state {
 361         int ret;
 362         int err;
 363 };
 364
 365 static void skel_fsync_done(struct tevent_req *subreq);
 366
 367 static struct tevent_req *skel_fsync_send(struct vfs_handle_struct *handle,
 368                                           TALLOC_CTX *mem_ctx,
 369                                           struct tevent_context *ev,
 370                                           struct files_struct *fsp)
 371 {
 372         struct tevent_req *req, *subreq;
 373         struct skel_fsync_state *state;
 374
 375         req = tevent_req_create(mem_ctx, &state, struct skel_fsync_state);
 376         if (req == NULL) {
 377                 return NULL;
 378         }
 379         subreq = SMB_VFS_NEXT_FSYNC_SEND(state, ev, handle, fsp);
 380         if (tevent_req_nomem(subreq, req)) {
 381                 return tevent_req_post(req, ev);
 382         }
 383         tevent_req_set_callback(subreq, skel_fsync_done, req);
 384         return req;
 385 }
 386
 387 static void skel_fsync_done(struct tevent_req *subreq)
 388 {
 389         struct tevent_req *req =
 390             tevent_req_callback_data(subreq, struct tevent_req);
 391         struct skel_fsync_state *state =
 392             tevent_req_data(req, struct skel_fsync_state);
 393
 394         state->ret = SMB_VFS_FSYNC_RECV(subreq, &state->err);
 395         TALLOC_FREE(subreq);
 396         tevent_req_done(req);
 397 }
 398
 399 static int skel_fsync_recv(struct tevent_req *req, int *err)
 400 {
 401         struct skel_fsync_state *state =
 402             tevent_req_data(req, struct skel_fsync_state);
 403
 404         if (tevent_req_is_unix_error(req, err)) {
 405                 return -1;
 406         }
 407         *err = state->err;
 408         return state->ret;
 409 }
 410
 411 static int skel_stat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
 412 {
 413         return SMB_VFS_NEXT_STAT(handle, smb_fname);
 414 }
 415
 416 static int skel_fstat(vfs_handle_struct *handle, files_struct *fsp,
 417                       SMB_STRUCT_STAT *sbuf)
 418 {
 419         return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
 420 }
 421
 422 static int skel_lstat(vfs_handle_struct *handle,
 423                       struct smb_filename *smb_fname)
 424 {
 425         return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
 426 }
 427
 428 static uint64_t skel_get_alloc_size(struct vfs_handle_struct *handle,
 429                                     struct files_struct *fsp,
 430                                     const SMB_STRUCT_STAT *sbuf)
 431 {
 432         return SMB_VFS_NEXT_GET_ALLOC_SIZE(handle, fsp, sbuf);
 433 }
 434
 435 static int skel_unlink(vfs_handle_struct *handle,
 436                        const struct smb_filename *smb_fname)
 437 {
 438         return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 439 }
 440
 441 static int skel_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 442 {
 443         return SMB_VFS_NEXT_CHMOD(handle, path, mode);
 444 }
 445
 446 static int skel_fchmod(vfs_handle_struct *handle, files_struct *fsp,
 447                        mode_t mode)
 448 {
 449         return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 450 }
 451
 452 static int skel_chown(vfs_handle_struct *handle, const char *path, uid_t uid,
 453                       gid_t gid)
 454 {
 455         return SMB_VFS_NEXT_CHOWN(handle, path, uid, gid);
 456 }
 457
 458 static int skel_fchown(vfs_handle_struct *handle, files_struct *fsp,
 459                        uid_t uid, gid_t gid)
 460 {
 461         return SMB_VFS_NEXT_FCHOWN(handle, fsp, uid, gid);
 462 }
 463
 464 static int skel_lchown(vfs_handle_struct *handle, const char *path, uid_t uid,
 465                        gid_t gid)
 466 {
 467         return SMB_VFS_NEXT_LCHOWN(handle, path, uid, gid);
 468 }
 469
 470 static int skel_chdir(vfs_handle_struct *handle, const char *path)
 471 {
 472         return SMB_VFS_NEXT_CHDIR(handle, path);
 473 }
 474
 475 static char *skel_getwd(vfs_handle_struct *handle)
 476 {
 477         return SMB_VFS_NEXT_GETWD(handle);
 478 }
 479
 480 static int skel_ntimes(vfs_handle_struct *handle,
 481                        const struct smb_filename *smb_fname,
 482                        struct smb_file_time *ft)
 483 {
 484         return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft);
 485 }
 486
 487 static int skel_ftruncate(vfs_handle_struct *handle, files_struct *fsp,
 488                           off_t offset)
 489 {
 490         return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
 491 }
 492
 493 static int skel_fallocate(vfs_handle_struct *handle, files_struct *fsp,
 494                           enum vfs_fallocate_mode mode, off_t offset, off_t len)
 495 {
 496         return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
 497 }
 498
 499 static bool skel_lock(vfs_handle_struct *handle, files_struct *fsp, int op,
 500                       off_t offset, off_t count, int type)
 501 {
 502         return SMB_VFS_NEXT_LOCK(handle, fsp, op, offset, count, type);
 503 }
 504
 505 static int skel_kernel_flock(struct vfs_handle_struct *handle,
 506                              struct files_struct *fsp, uint32 share_mode,
 507                              uint32 access_mask)
 508 {
 509         return SMB_VFS_NEXT_KERNEL_FLOCK(handle, fsp, share_mode, access_mask);
 510 }
 511
 512 static int skel_linux_setlease(struct vfs_handle_struct *handle,
 513                                struct files_struct *fsp, int leasetype)
 514 {
 515         return SMB_VFS_NEXT_LINUX_SETLEASE(handle, fsp, leasetype);
 516 }
 517
 518 static bool skel_getlock(vfs_handle_struct *handle, files_struct *fsp,
 519                          off_t *poffset, off_t *pcount, int *ptype,
 520                          pid_t *ppid)
 521 {
 522         return SMB_VFS_NEXT_GETLOCK(handle, fsp, poffset, pcount, ptype, ppid);
 523 }
 524
 525 static int skel_symlink(vfs_handle_struct *handle, const char *oldpath,
 526                         const char *newpath)
 527 {
 528         return SMB_VFS_NEXT_SYMLINK(handle, oldpath, newpath);
 529 }
 530
 531 static int skel_vfs_readlink(vfs_handle_struct *handle, const char *path,
 532                              char *buf, size_t bufsiz)
 533 {
 534         return SMB_VFS_NEXT_READLINK(handle, path, buf, bufsiz);
 535 }
 536
 537 static int skel_link(vfs_handle_struct *handle, const char *oldpath,
 538                      const char *newpath)
 539 {
 540         return SMB_VFS_NEXT_LINK(handle, oldpath, newpath);
 541 }
 542
 543 static int skel_mknod(vfs_handle_struct *handle, const char *path, mode_t mode,
 544                       SMB_DEV_T dev)
 545 {
 546         return SMB_VFS_NEXT_MKNOD(handle, path, mode, dev);
 547 }
 548
 549 static char *skel_realpath(vfs_handle_struct *handle, const char *path)
 550 {
 551         return SMB_VFS_NEXT_REALPATH(handle, path);
 552 }
 553
 554 static NTSTATUS skel_notify_watch(struct vfs_handle_struct *handle,
 555                                   struct sys_notify_context *ctx,
 556                                   const char *path,
 557                                   uint32_t *filter,
 558                                   uint32_t *subdir_filter,
 559                                   void (*callback) (struct sys_notify_context *ctx,
 560                                                     void *private_data,
 561                                                     struct notify_event *ev),
 562                                   void *private_data, void *handle_p)
 563 {
 564         return SMB_VFS_NEXT_NOTIFY_WATCH(handle, ctx, path,
 565                                          filter, subdir_filter, callback,
 566                                          private_data, handle_p);
 567 }
 568
 569 static int skel_chflags(vfs_handle_struct *handle, const char *path,
 570                         uint flags)
 571 {
 572         return SMB_VFS_NEXT_CHFLAGS(handle, path, flags);
 573 }
 574
 575 static struct file_id skel_file_id_create(vfs_handle_struct *handle,
 576                                           const SMB_STRUCT_STAT *sbuf)
 577 {
 578         return SMB_VFS_NEXT_FILE_ID_CREATE(handle, sbuf);
 579 }
 580
 581 struct skel_cc_state {
 582         struct vfs_handle_struct *handle;
 583         off_t copied;
 584 };
 585 static void skel_copy_chunk_done(struct tevent_req *subreq);
 586
 587 static struct tevent_req *skel_copy_chunk_send(struct vfs_handle_struct *handle,
 588                                                TALLOC_CTX *mem_ctx,
 589                                                struct tevent_context *ev,
 590                                                struct files_struct *src_fsp,
 591                                                off_t src_off,
 592                                                struct files_struct *dest_fsp,
 593                                                off_t dest_off,
 594                                                off_t num)
 595 {
 596         struct tevent_req *req;
 597         struct tevent_req *subreq;
 598         struct skel_cc_state *cc_state;
 599
 600         req = tevent_req_create(mem_ctx, &cc_state, struct skel_cc_state);
 601         if (req == NULL) {
 602                 return NULL;
 603         }
 604
 605         cc_state->handle = handle;
 606         subreq = SMB_VFS_NEXT_COPY_CHUNK_SEND(handle, cc_state, ev,
 607                                               src_fsp, src_off,
 608                                               dest_fsp, dest_off, num);
 609         if (tevent_req_nomem(subreq, req)) {
 610                 return tevent_req_post(req, ev);
 611         }
 612
 613         tevent_req_set_callback(subreq, skel_copy_chunk_done, req);
 614         return req;
 615 }
 616
 617 static void skel_copy_chunk_done(struct tevent_req *subreq)
 618 {
 619         struct tevent_req *req = tevent_req_callback_data(
 620                 subreq, struct tevent_req);
 621         struct skel_cc_state *cc_state
 622                         = tevent_req_data(req, struct skel_cc_state);
 623         NTSTATUS status;
 624
 625         status = SMB_VFS_NEXT_COPY_CHUNK_RECV(cc_state->handle,
 626                                               subreq,
 627                                               &cc_state->copied);
 628         TALLOC_FREE(subreq);
 629         if (tevent_req_nterror(req, status)) {
 630                 return;
 631         }
 632         tevent_req_done(req);
 633 }
 634
 635 static NTSTATUS skel_copy_chunk_recv(struct vfs_handle_struct *handle,
 636                                      struct tevent_req *req,
 637                                      off_t *copied)
 638 {
 639         struct skel_cc_state *cc_state
 640                         = tevent_req_data(req, struct skel_cc_state);
 641         NTSTATUS status;
 642
 643         *copied = cc_state->copied;
 644         if (tevent_req_is_nterror(req, &status)) {
 645                 tevent_req_received(req);
 646                 return status;
 647         }
 648
 649         tevent_req_received(req);
 650         return NT_STATUS_OK;
 651 }
 652
 653 static NTSTATUS skel_get_compression(struct vfs_handle_struct *handle,
 654                                      TALLOC_CTX *mem_ctx,
 655                                      struct files_struct *fsp,
 656                                      struct smb_filename *smb_fname,
 657                                      uint16_t *_compression_fmt)
 658 {
 659         return SMB_VFS_NEXT_GET_COMPRESSION(handle, mem_ctx, fsp, smb_fname,
 660                                             _compression_fmt);
 661 }
 662
 663 static NTSTATUS skel_set_compression(struct vfs_handle_struct *handle,
 664                                      TALLOC_CTX *mem_ctx,
 665                                      struct files_struct *fsp,
 666                                      uint16_t compression_fmt)
 667 {
 668         return SMB_VFS_NEXT_SET_COMPRESSION(handle, mem_ctx, fsp,
 669                                             compression_fmt);
 670 }
 671
 672 static NTSTATUS skel_streaminfo(struct vfs_handle_struct *handle,
 673                                 struct files_struct *fsp,
 674                                 const char *fname,
 675                                 TALLOC_CTX *mem_ctx,
 676                                 unsigned int *num_streams,
 677                                 struct stream_struct **streams)
 678 {
 679         return SMB_VFS_NEXT_STREAMINFO(handle,
 680                                        fsp,
 681                                        fname, mem_ctx, num_streams, streams);
 682 }
 683
 684 static int skel_get_real_filename(struct vfs_handle_struct *handle,
 685                                   const char *path,
 686                                   const char *name,
 687                                   TALLOC_CTX *mem_ctx, char **found_name)
 688 {
 689         return SMB_VFS_NEXT_GET_REAL_FILENAME(handle,
 690                                               path, name, mem_ctx, found_name);
 691 }
 692
 693 static const char *skel_connectpath(struct vfs_handle_struct *handle,
 694                                     const char *filename)
 695 {
 696         return SMB_VFS_NEXT_CONNECTPATH(handle, filename);
 697 }
 698
 699 static NTSTATUS skel_brl_lock_windows(struct vfs_handle_struct *handle,
 700                                       struct byte_range_lock *br_lck,
 701                                       struct lock_struct *plock,
 702                                       bool blocking_lock)
 703 {
 704         return SMB_VFS_NEXT_BRL_LOCK_WINDOWS(handle,
 705                                              br_lck, plock, blocking_lock);
 706 }
 707
 708 static bool skel_brl_unlock_windows(struct vfs_handle_struct *handle,
 709                                     struct messaging_context *msg_ctx,
 710                                     struct byte_range_lock *br_lck,
 711                                     const struct lock_struct *plock)
 712 {
 713         return SMB_VFS_NEXT_BRL_UNLOCK_WINDOWS(handle, msg_ctx, br_lck, plock);
 714 }
 715
 716 static bool skel_brl_cancel_windows(struct vfs_handle_struct *handle,
 717                                     struct byte_range_lock *br_lck,
 718                                     struct lock_struct *plock)
 719 {
 720         return SMB_VFS_NEXT_BRL_CANCEL_WINDOWS(handle, br_lck, plock);
 721 }
 722
 723 static bool skel_strict_lock(struct vfs_handle_struct *handle,
 724                              struct files_struct *fsp,
 725                              struct lock_struct *plock)
 726 {
 727         return SMB_VFS_NEXT_STRICT_LOCK(handle, fsp, plock);
 728 }
 729
 730 static void skel_strict_unlock(struct vfs_handle_struct *handle,
 731                                struct files_struct *fsp,
 732                                struct lock_struct *plock)
 733 {
 734         SMB_VFS_NEXT_STRICT_UNLOCK(handle, fsp, plock);
 735 }
 736
 737 static NTSTATUS skel_translate_name(struct vfs_handle_struct *handle,
 738                                     const char *mapped_name,
 739                                     enum vfs_translate_direction direction,
 740                                     TALLOC_CTX *mem_ctx, char **pmapped_name)
 741 {
 742         return SMB_VFS_NEXT_TRANSLATE_NAME(handle, mapped_name, direction,
 743                                            mem_ctx, pmapped_name);
 744 }
 745
 746 static NTSTATUS skel_fsctl(struct vfs_handle_struct *handle,
 747                            struct files_struct *fsp,
 748                            TALLOC_CTX *ctx,
 749                            uint32_t function,
 750                            uint16_t req_flags,  /* Needed for UNICODE ... */
 751                            const uint8_t *_in_data,
 752                            uint32_t in_len,
 753                            uint8_t ** _out_data,
 754                            uint32_t max_out_len, uint32_t *out_len)
 755 {
 756         return SMB_VFS_NEXT_FSCTL(handle,
 757                                   fsp,
 758                                   ctx,
 759                                   function,
 760                                   req_flags,
 761                                   _in_data,
 762                                   in_len, _out_data, max_out_len, out_len);
 763 }
 764
 765 static NTSTATUS skel_readdir_attr(struct vfs_handle_struct *handle,
 766                                   const struct smb_filename *fname,
 767                                   TALLOC_CTX *mem_ctx,
 768                                   struct readdir_attr_data **pattr_data)
 769 {
 770         return SMB_VFS_NEXT_READDIR_ATTR(handle, fname, mem_ctx, pattr_data);
 771 }
 772
 773 static NTSTATUS skel_fget_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
 774                                  uint32 security_info,
 775                                  TALLOC_CTX *mem_ctx,
 776                                  struct security_descriptor **ppdesc)
 777 {
 778         return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info, mem_ctx,
 779                                         ppdesc);
 780 }
 781
 782 static NTSTATUS skel_get_nt_acl(vfs_handle_struct *handle,
 783                                 const char *name, uint32 security_info,
 784                                 TALLOC_CTX *mem_ctx,
 785                                 struct security_descriptor **ppdesc)
 786 {
 787         return SMB_VFS_NEXT_GET_NT_ACL(handle, name, security_info, mem_ctx,
 788                                        ppdesc);
 789 }
 790
 791 static NTSTATUS skel_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
 792                                  uint32 security_info_sent,
 793                                  const struct security_descriptor *psd)
 794 {
 795         return SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
 796 }
 797
 798 static int skel_chmod_acl(vfs_handle_struct *handle, const char *name,
 799                           mode_t mode)
 800 {
 801         return SMB_VFS_NEXT_CHMOD_ACL(handle, name, mode);
 802 }
 803
 804 static int skel_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp,
 805                            mode_t mode)
 806 {
 807         return SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 808 }
 809
 810 static SMB_ACL_T skel_sys_acl_get_file(vfs_handle_struct *handle,
 811                                        const char *path_p,
 812                                        SMB_ACL_TYPE_T type,
 813                                        TALLOC_CTX *mem_ctx)
 814 {
 815         return SMB_VFS_NEXT_SYS_ACL_GET_FILE(handle, path_p, type, mem_ctx);
 816 }
 817
 818 static SMB_ACL_T skel_sys_acl_get_fd(vfs_handle_struct *handle,
 819                                      files_struct *fsp, TALLOC_CTX *mem_ctx)
 820 {
 821         return SMB_VFS_NEXT_SYS_ACL_GET_FD(handle, fsp, mem_ctx);
 822 }
 823
 824 static int skel_sys_acl_blob_get_file(vfs_handle_struct *handle,
 825                                       const char *path_p, TALLOC_CTX *mem_ctx,
 826                                       char **blob_description, DATA_BLOB *blob)
 827 {
 828         return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FILE(handle, path_p, mem_ctx,
 829                                                   blob_description, blob);
 830 }
 831
 832 static int skel_sys_acl_blob_get_fd(vfs_handle_struct *handle,
 833                                     files_struct *fsp, TALLOC_CTX *mem_ctx,
 834                                     char **blob_description, DATA_BLOB *blob)
 835 {
 836         return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FD(handle, fsp, mem_ctx,
 837                                                 blob_description, blob);
 838 }
 839
 840 static int skel_sys_acl_set_file(vfs_handle_struct *handle, const char *name,
 841                                  SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
 842 {
 843         return SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle, name, acltype, theacl);
 844 }
 845
 846 static int skel_sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
 847                                SMB_ACL_T theacl)
 848 {
 849         return SMB_VFS_NEXT_SYS_ACL_SET_FD(handle, fsp, theacl);
 850 }
 851
 852 static int skel_sys_acl_delete_def_file(vfs_handle_struct *handle,
 853                                         const char *path)
 854 {
 855         return SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FILE(handle, path);
 856 }
 857
 858 static ssize_t skel_getxattr(vfs_handle_struct *handle, const char *path,
 859                              const char *name, void *value, size_t size)
 860 {
 861         return SMB_VFS_NEXT_GETXATTR(handle, path, name, value, size);
 862 }
 863
 864 static ssize_t skel_fgetxattr(vfs_handle_struct *handle,
 865                               struct files_struct *fsp, const char *name,
 866                               void *value, size_t size)
 867 {
 868         return SMB_VFS_NEXT_FGETXATTR(handle, fsp, name, value, size);
 869 }
 870
 871 static ssize_t skel_listxattr(vfs_handle_struct *handle, const char *path,
 872                               char *list, size_t size)
 873 {
 874         return SMB_VFS_NEXT_LISTXATTR(handle, path, list, size);
 875 }
 876
 877 static ssize_t skel_flistxattr(vfs_handle_struct *handle,
 878                                struct files_struct *fsp, char *list,
 879                                size_t size)
 880 {
 881         return SMB_VFS_NEXT_FLISTXATTR(handle, fsp, list, size);
 882 }
 883
 884 static int skel_removexattr(vfs_handle_struct *handle, const char *path,
 885                             const char *name)
 886 {
 887         return SMB_VFS_NEXT_REMOVEXATTR(handle, path, name);
 888 }
 889
 890 static int skel_fremovexattr(vfs_handle_struct *handle,
 891                              struct files_struct *fsp, const char *name)
 892 {
 893         return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, name);
 894 }
 895
 896 static int skel_setxattr(vfs_handle_struct *handle, const char *path,
 897                          const char *name, const void *value, size_t size,
 898                          int flags)
 899 {
 900         return SMB_VFS_NEXT_SETXATTR(handle, path, name, value, size, flags);
 901 }
 902
 903 static int skel_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp,
 904                           const char *name, const void *value, size_t size,
 905                           int flags)
 906 {
 907         return SMB_VFS_NEXT_FSETXATTR(handle, fsp, name, value, size, flags);
 908 }
 909
 910 static bool skel_aio_force(struct vfs_handle_struct *handle,
 911                            struct files_struct *fsp)
 912 {
 913         return SMB_VFS_NEXT_AIO_FORCE(handle, fsp);
 914 }
 915
 916 static bool skel_is_offline(struct vfs_handle_struct *handle,
 917                             const struct smb_filename *fname,
 918                             SMB_STRUCT_STAT *sbuf)
 919 {
 920         return SMB_VFS_NEXT_IS_OFFLINE(handle, fname, sbuf);
 921 }
 922
 923 static int skel_set_offline(struct vfs_handle_struct *handle,
 924                             const struct smb_filename *fname)
 925 {
 926         return SMB_VFS_NEXT_SET_OFFLINE(handle, fname);
 927 }
 928
 929 /* VFS operations structure */
 930
 931 struct vfs_fn_pointers skel_transparent_fns = {
 932         /* Disk operations */
 933
 934         .connect_fn = skel_connect,
 935         .disconnect_fn = skel_disconnect,
 936         .disk_free_fn = skel_disk_free,
 937         .get_quota_fn = skel_get_quota,
 938         .set_quota_fn = skel_set_quota,
 939         .get_shadow_copy_data_fn = skel_get_shadow_copy_data,
 940         .statvfs_fn = skel_statvfs,
 941         .fs_capabilities_fn = skel_fs_capabilities,
 942         .get_dfs_referrals_fn = skel_get_dfs_referrals,
 943
 944         /* Directory operations */
 945
 946         .opendir_fn = skel_opendir,
 947         .fdopendir_fn = skel_fdopendir,
 948         .readdir_fn = skel_readdir,
 949         .seekdir_fn = skel_seekdir,
 950         .telldir_fn = skel_telldir,
 951         .rewind_dir_fn = skel_rewind_dir,
 952         .mkdir_fn = skel_mkdir,
 953         .rmdir_fn = skel_rmdir,
 954         .closedir_fn = skel_closedir,
 955         .init_search_op_fn = skel_init_search_op,
 956
 957         /* File operations */
 958
 959         .open_fn = skel_open,
 960         .create_file_fn = skel_create_file,
 961         .close_fn = skel_close_fn,
 962         .read_fn = skel_vfs_read,
 963         .pread_fn = skel_pread,
 964         .pread_send_fn = skel_pread_send,
 965         .pread_recv_fn = skel_pread_recv,
 966         .write_fn = skel_write,
 967         .pwrite_fn = skel_pwrite,
 968         .pwrite_send_fn = skel_pwrite_send,
 969         .pwrite_recv_fn = skel_pwrite_recv,
 970         .lseek_fn = skel_lseek,
 971         .sendfile_fn = skel_sendfile,
 972         .recvfile_fn = skel_recvfile,
 973         .rename_fn = skel_rename,
 974         .fsync_fn = skel_fsync,
 975         .fsync_send_fn = skel_fsync_send,
 976         .fsync_recv_fn = skel_fsync_recv,
 977         .stat_fn = skel_stat,
 978         .fstat_fn = skel_fstat,
 979         .lstat_fn = skel_lstat,
 980         .get_alloc_size_fn = skel_get_alloc_size,
 981         .unlink_fn = skel_unlink,
 982         .chmod_fn = skel_chmod,
 983         .fchmod_fn = skel_fchmod,
 984         .chown_fn = skel_chown,
 985         .fchown_fn = skel_fchown,
 986         .lchown_fn = skel_lchown,
 987         .chdir_fn = skel_chdir,
 988         .getwd_fn = skel_getwd,
 989         .ntimes_fn = skel_ntimes,
 990         .ftruncate_fn = skel_ftruncate,
 991         .fallocate_fn = skel_fallocate,
 992         .lock_fn = skel_lock,
 993         .kernel_flock_fn = skel_kernel_flock,
 994         .linux_setlease_fn = skel_linux_setlease,
 995         .getlock_fn = skel_getlock,
 996         .symlink_fn = skel_symlink,
 997         .readlink_fn = skel_vfs_readlink,
 998         .link_fn = skel_link,
 999         .mknod_fn = skel_mknod,
1000         .realpath_fn = skel_realpath,
1001         .notify_watch_fn = skel_notify_watch,
1002         .chflags_fn = skel_chflags,
1003         .file_id_create_fn = skel_file_id_create,
1004         .copy_chunk_send_fn = skel_copy_chunk_send,
1005         .copy_chunk_recv_fn = skel_copy_chunk_recv,
1006         .get_compression_fn = skel_get_compression,
1007         .set_compression_fn = skel_set_compression,
1008
1009         .streaminfo_fn = skel_streaminfo,
1010         .get_real_filename_fn = skel_get_real_filename,
1011         .connectpath_fn = skel_connectpath,
1012         .brl_lock_windows_fn = skel_brl_lock_windows,
1013         .brl_unlock_windows_fn = skel_brl_unlock_windows,
1014         .brl_cancel_windows_fn = skel_brl_cancel_windows,
1015         .strict_lock_fn = skel_strict_lock,
1016         .strict_unlock_fn = skel_strict_unlock,
1017         .translate_name_fn = skel_translate_name,
1018         .fsctl_fn = skel_fsctl,
1019         .readdir_attr_fn = skel_readdir_attr,
1020
1021         /* NT ACL operations. */
1022
1023         .fget_nt_acl_fn = skel_fget_nt_acl,
1024         .get_nt_acl_fn = skel_get_nt_acl,
1025         .fset_nt_acl_fn = skel_fset_nt_acl,
1026
1027         /* POSIX ACL operations. */
1028
1029         .chmod_acl_fn = skel_chmod_acl,
1030         .fchmod_acl_fn = skel_fchmod_acl,
1031
1032         .sys_acl_get_file_fn = skel_sys_acl_get_file,
1033         .sys_acl_get_fd_fn = skel_sys_acl_get_fd,
1034         .sys_acl_blob_get_file_fn = skel_sys_acl_blob_get_file,
1035         .sys_acl_blob_get_fd_fn = skel_sys_acl_blob_get_fd,
1036         .sys_acl_set_file_fn = skel_sys_acl_set_file,
1037         .sys_acl_set_fd_fn = skel_sys_acl_set_fd,
1038         .sys_acl_delete_def_file_fn = skel_sys_acl_delete_def_file,
1039
1040         /* EA operations. */
1041         .getxattr_fn = skel_getxattr,
1042         .fgetxattr_fn = skel_fgetxattr,
1043         .listxattr_fn = skel_listxattr,
1044         .flistxattr_fn = skel_flistxattr,
1045         .removexattr_fn = skel_removexattr,
1046         .fremovexattr_fn = skel_fremovexattr,
1047         .setxattr_fn = skel_setxattr,
1048         .fsetxattr_fn = skel_fsetxattr,
1049
1050         /* aio operations */
1051         .aio_force_fn = skel_aio_force,
1052
1053         /* offline operations */
1054         .is_offline_fn = skel_is_offline,
1055         .set_offline_fn = skel_set_offline
1056 };
1057
1058 NTSTATUS vfs_skel_transparent_init(void)
1059 {
1060         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "skel_transparent",
1061                                 &skel_transparent_fns);
1062 }