source3/modules/vfs_shadow_copy2.c

   1 /*
   2  * shadow_copy2: a shadow copy module (second implementation)
   3  *
   4  * Copyright (C) Andrew Tridgell   2007 (portions taken from shadow_copy2)
   5  * Copyright (C) Ed Plese          2009
   6  * Copyright (C) Volker Lendecke   2011
   7  * Copyright (C) Christian Ambach  2011
   8  * Copyright (C) Michael Adam      2013
   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 2 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, write to the Free Software
  22  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  */
  24
  25 /*
  26  * This is a second implemetation of a shadow copy module for exposing
  27  * file system snapshots to windows clients as shadow copies.
  28  *
  29  * See the manual page for documentation.
  30  */
  31
  32 #include "includes.h"
  33 #include "smbd/smbd.h"
  34 #include "system/filesys.h"
  35 #include "include/ntioctl.h"
  36 #include "util_tdb.h"
  37
  38 struct shadow_copy2_config {
  39         char *gmt_format;
  40         bool use_sscanf;
  41         bool use_localtime;
  42         char *snapdir;
  43         bool snapdirseverywhere;
  44         bool crossmountpoints;
  45         bool fixinodes;
  46         char *sort_order;
  47         bool snapdir_absolute;
  48         char *mount_point;
  49         char *rel_connectpath; /* share root, relative to a snapshot root */
  50         char *snapshot_basepath; /* the absolute version of snapdir */
  51 };
  52
  53 static bool shadow_copy2_find_slashes(TALLOC_CTX *mem_ctx, const char *str,
  54                                       size_t **poffsets,
  55                                       unsigned *pnum_offsets)
  56 {
  57         unsigned num_offsets;
  58         size_t *offsets;
  59         const char *p;
  60
  61         num_offsets = 0;
  62
  63         p = str;
  64         while ((p = strchr(p, '/')) != NULL) {
  65                 num_offsets += 1;
  66                 p += 1;
  67         }
  68
  69         offsets = talloc_array(mem_ctx, size_t, num_offsets);
  70         if (offsets == NULL) {
  71                 return false;
  72         }
  73
  74         p = str;
  75         num_offsets = 0;
  76         while ((p = strchr(p, '/')) != NULL) {
  77                 offsets[num_offsets] = p-str;
  78                 num_offsets += 1;
  79                 p += 1;
  80         }
  81
  82         *poffsets = offsets;
  83         *pnum_offsets = num_offsets;
  84         return true;
  85 }
  86
  87 /**
  88  * Given a timestamp, build the posix level GMT-tag string
  89  * based on the configurable format.
  90  */
  91 static size_t shadow_copy2_posix_gmt_string(struct vfs_handle_struct *handle,
  92                                             time_t snapshot,
  93                                             char *snaptime_string,
  94                                             size_t len)
  95 {
  96         struct tm snap_tm;
  97         size_t snaptime_len;
  98         struct shadow_copy2_config *config;
  99
 100         SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
 101                                 return 0);
 102
 103         if (config->use_sscanf) {
 104                 snaptime_len = snprintf(snaptime_string,
 105                                         len,
 106                                         config->gmt_format,
 107                                         (unsigned long)snapshot);
 108                 if (snaptime_len <= 0) {
 109                         DEBUG(10, ("snprintf failed\n"));
 110                         return snaptime_len;
 111                 }
 112         } else {
 113                 if (config->use_localtime) {
 114                         if (localtime_r(&snapshot, &snap_tm) == 0) {
 115                                 DEBUG(10, ("gmtime_r failed\n"));
 116                                 return -1;
 117                         }
 118                 } else {
 119                         if (gmtime_r(&snapshot, &snap_tm) == 0) {
 120                                 DEBUG(10, ("gmtime_r failed\n"));
 121                                 return -1;
 122                         }
 123                 }
 124                 snaptime_len = strftime(snaptime_string,
 125                                         len,
 126                                         config->gmt_format,
 127                                         &snap_tm);
 128                 if (snaptime_len == 0) {
 129                         DEBUG(10, ("strftime failed\n"));
 130                         return 0;
 131                 }
 132         }
 133
 134         return snaptime_len;
 135 }
 136
 137 /**
 138  * Given a timestamp, build the string to insert into a path
 139  * as a path component for creating the local path to the
 140  * snapshot at the given timestamp of the input path.
 141  *
 142  * In the case of a parallel snapdir (specified with an
 143  * absolute path), this is the inital portion of the
 144  * local path of any snapshot file. The complete path is
 145  * obtained by appending the portion of the file's path
 146  * below the share root's mountpoint.
 147  */
 148 static char *shadow_copy2_insert_string(TALLOC_CTX *mem_ctx,
 149                                         struct vfs_handle_struct *handle,
 150                                         time_t snapshot)
 151 {
 152         fstring snaptime_string;
 153         size_t snaptime_len = 0;
 154         char *result = NULL;
 155         struct shadow_copy2_config *config;
 156
 157         SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
 158                                 return NULL);
 159
 160         snaptime_len = shadow_copy2_posix_gmt_string(handle,
 161                                                      snapshot,
 162                                                      snaptime_string,
 163                                                      sizeof(snaptime_string));
 164         if (snaptime_len <= 0) {
 165                 return NULL;
 166         }
 167
 168         if (config->snapdir_absolute) {
 169                 result = talloc_asprintf(mem_ctx, "%s/%s",
 170                                          config->snapdir, snaptime_string);
 171         } else {
 172                 result = talloc_asprintf(mem_ctx, "/%s/%s",
 173                                          config->snapdir, snaptime_string);
 174         }
 175         if (result == NULL) {
 176                 DEBUG(1, (__location__ " talloc_asprintf failed\n"));
 177         }
 178
 179         return result;
 180 }
 181
 182 /**
 183  * Build the posix snapshot path for the connection
 184  * at the given timestamp, i.e. the absolute posix path
 185  * that contains the snapshot for this file system.
 186  *
 187  * This only applies to classical case, i.e. not
 188  * to the "snapdirseverywhere" mode.
 189  */
 190 static char *shadow_copy2_snapshot_path(TALLOC_CTX *mem_ctx,
 191                                         struct vfs_handle_struct *handle,
 192                                         time_t snapshot)
 193 {
 194         fstring snaptime_string;
 195         size_t snaptime_len = 0;
 196         char *result = NULL;
 197         struct shadow_copy2_config *config;
 198
 199         SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
 200                                 return NULL);
 201
 202         snaptime_len = shadow_copy2_posix_gmt_string(handle,
 203                                                      snapshot,
 204                                                      snaptime_string,
 205                                                      sizeof(snaptime_string));
 206         if (snaptime_len <= 0) {
 207                 return NULL;
 208         }
 209
 210         result = talloc_asprintf(mem_ctx, "%s/%s",
 211                                  config->snapshot_basepath, snaptime_string);
 212         if (result == NULL) {
 213                 DEBUG(1, (__location__ " talloc_asprintf failed\n"));
 214         }
 215
 216         return result;
 217 }
 218
 219 /**
 220  * Strip a snapshot component from a filename as
 221  * handed in via the smb layer.
 222  * Returns the parsed timestamp and the stripped filename.
 223  */
 224 static bool shadow_copy2_strip_snapshot(TALLOC_CTX *mem_ctx,
 225                                         struct vfs_handle_struct *handle,
 226                                         const char *name,
 227                                         time_t *ptimestamp,
 228                                         char **pstripped)
 229 {
 230         struct tm tm;
 231         time_t timestamp;
 232         const char *p;
 233         char *q;
 234         char *stripped;
 235         size_t rest_len, dst_len;
 236         struct shadow_copy2_config *config;
 237         const char *snapdir;
 238         ssize_t snapdirlen;
 239         ptrdiff_t len_before_gmt;
 240
 241         SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
 242                                 return false);
 243
 244         DEBUG(10, (__location__ ": enter path '%s'\n", name));
 245
 246         p = strstr_m(name, "@GMT-");
 247         if (p == NULL) {
 248                 DEBUG(11, ("@GMT not found\n"));
 249                 goto no_snapshot;
 250         }
 251         if ((p > name) && (p[-1] != '/')) {
 252                 /* the GMT-token does not start a path-component */
 253                 DEBUG(10, ("not at start, p=%p, name=%p, p[-1]=%d\n",
 254                            p, name, (int)p[-1]));
 255                 goto no_snapshot;
 256         }
 257
 258         /*
 259          * Figure out whether we got an already converted string. One
 260          * case where this happens is in a smb2 create call with the
 261          * mxac create blob set. We do the get_acl call on
 262          * fsp->fsp_name, which is already converted. We are converted
 263          * if we got a file name of the form ".snapshots/@GMT-",
 264          * i.e. ".snapshots/" precedes "p".
 265          */
 266
 267         snapdir = lp_parm_const_string(SNUM(handle->conn), "shadow", "snapdir",
 268                                        ".snapshots");
 269         snapdirlen = strlen(snapdir);
 270         len_before_gmt = p - name;
 271
 272         if ((len_before_gmt >= (snapdirlen + 1)) && (p[-1] == '/')) {
 273                 const char *parent_snapdir = p - (snapdirlen+1);
 274
 275                 DEBUG(10, ("parent_snapdir = %s\n", parent_snapdir));
 276
 277                 if (strncmp(parent_snapdir, snapdir, snapdirlen) == 0) {
 278                         DEBUG(10, ("name=%s is already converted\n", name));
 279                         goto no_snapshot;
 280                 }
 281         }
 282         q = strptime(p, GMT_FORMAT, &tm);
 283         if (q == NULL) {
 284                 DEBUG(10, ("strptime failed\n"));
 285                 goto no_snapshot;
 286         }
 287         tm.tm_isdst = -1;
 288         timestamp = timegm(&tm);
 289         if (timestamp == (time_t)-1) {
 290                 DEBUG(10, ("timestamp==-1\n"));
 291                 goto no_snapshot;
 292         }
 293         if (q[0] == '\0') {
 294                 /*
 295                  * The name consists of only the GMT token or the GMT
 296                  * token is at the end of the path. XP seems to send
 297                  * @GMT- at the end under certain circumstances even
 298                  * with a path prefix.
 299                  */
 300                 if (pstripped != NULL) {
 301                         stripped = talloc_strndup(mem_ctx, name, p - name);
 302                         if (stripped == NULL) {
 303                                 return false;
 304                         }
 305                         *pstripped = stripped;
 306                 }
 307                 *ptimestamp = timestamp;
 308                 return true;
 309         }
 310         if (q[0] != '/') {
 311                 /*
 312                  * It is not a complete path component, i.e. the path
 313                  * component continues after the gmt-token.
 314                  */
 315                 DEBUG(10, ("q[0] = %d\n", (int)q[0]));
 316                 goto no_snapshot;
 317         }
 318         q += 1;
 319
 320         rest_len = strlen(q);
 321         dst_len = (p-name) + rest_len;
 322
 323         if (config->snapdirseverywhere) {
 324                 char *insert;
 325                 bool have_insert;
 326                 insert = shadow_copy2_insert_string(talloc_tos(), handle,
 327                                                     timestamp);
 328                 if (insert == NULL) {
 329                         errno = ENOMEM;
 330                         return false;
 331                 }
 332
 333                 DEBUG(10, (__location__ ": snapdirseverywhere mode.\n"
 334                            "path '%s'.\n"
 335                            "insert string '%s'\n", name, insert));
 336
 337                 have_insert = (strstr(name, insert+1) != NULL);
 338                 DEBUG(10, ("have_insert=%d, name=%s, insert+1=%s\n",
 339                            (int)have_insert, name, insert+1));
 340                 if (have_insert) {
 341                         DEBUG(10, (__location__ ": insert string '%s' found in "
 342                                    "path '%s' found in snapdirseverywhere mode "
 343                                    "==> already converted\n", insert, name));
 344                         TALLOC_FREE(insert);
 345                         goto no_snapshot;
 346                 }
 347                 TALLOC_FREE(insert);
 348         } else {
 349                 char *snapshot_path;
 350                 char *s;
 351
 352                 snapshot_path = shadow_copy2_snapshot_path(talloc_tos(),
 353                                                            handle,
 354                                                            timestamp);
 355                 if (snapshot_path == NULL) {
 356                         errno = ENOMEM;
 357                         return false;
 358                 }
 359
 360                 DEBUG(10, (__location__ " path: '%s'.\n"
 361                            "snapshot path: '%s'\n", name, snapshot_path));
 362
 363                 s = strstr(name, snapshot_path);
 364                 if (s == name) {
 365                         /*
 366                          * this starts with "snapshot_basepath/GMT-Token"
 367                          * so it is already a converted absolute
 368                          * path. Don't process further.
 369                          */
 370                         DEBUG(10, (__location__ ": path '%s' starts with "
 371                                    "snapshot path '%s' (not in "
 372                                    "snapdirseverywhere mode) ==> "
 373                                    "already converted\n", name, snapshot_path));
 374                         talloc_free(snapshot_path);
 375                         goto no_snapshot;
 376                 }
 377                 talloc_free(snapshot_path);
 378         }
 379
 380         if (pstripped != NULL) {
 381                 stripped = talloc_array(mem_ctx, char, dst_len+1);
 382                 if (stripped == NULL) {
 383                         errno = ENOMEM;
 384                         return false;
 385                 }
 386                 if (p > name) {
 387                         memcpy(stripped, name, p-name);
 388                 }
 389                 if (rest_len > 0) {
 390                         memcpy(stripped + (p-name), q, rest_len);
 391                 }
 392                 stripped[dst_len] = '\0';
 393                 *pstripped = stripped;
 394         }
 395         *ptimestamp = timestamp;
 396         return true;
 397 no_snapshot:
 398         *ptimestamp = 0;
 399         return true;
 400 }
 401
 402 static char *shadow_copy2_find_mount_point(TALLOC_CTX *mem_ctx,
 403                                            vfs_handle_struct *handle)
 404 {
 405         char *path = talloc_strdup(mem_ctx, handle->conn->connectpath);
 406         dev_t dev;
 407         struct stat st;
 408         char *p;
 409
 410         if (stat(path, &st) != 0) {
 411                 talloc_free(path);
 412                 return NULL;
 413         }
 414
 415         dev = st.st_dev;
 416
 417         while ((p = strrchr(path, '/')) && p > path) {
 418                 *p = 0;
 419                 if (stat(path, &st) != 0) {
 420                         talloc_free(path);
 421                         return NULL;
 422                 }
 423                 if (st.st_dev != dev) {
 424                         *p = '/';
 425                         break;
 426                 }
 427         }
 428
 429         return path;
 430 }
 431
 432 /**
 433  * Convert from a name as handed in via the SMB layer
 434  * and a timestamp into the local path of the snapshot
 435  * of the provided file at the provided time.
 436  * Also return the path in the snapshot corresponding
 437  * to the file's share root.
 438  */
 439 static char *shadow_copy2_do_convert(TALLOC_CTX *mem_ctx,
 440                                      struct vfs_handle_struct *handle,
 441                                      const char *name, time_t timestamp,
 442                                      size_t *snaproot_len)
 443 {
 444         struct smb_filename converted_fname;
 445         char *result = NULL;
 446         size_t *slashes = NULL;
 447         unsigned num_slashes;
 448         char *path = NULL;
 449         size_t pathlen;
 450         char *insert = NULL;
 451         char *converted = NULL;
 452         size_t insertlen, connectlen = 0;
 453         int i, saved_errno;
 454         size_t min_offset;
 455         struct shadow_copy2_config *config;
 456         size_t in_share_offset = 0;
 457
 458         SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
 459                                 return NULL);
 460
 461         DEBUG(10, ("converting '%s'\n", name));
 462
 463         if (!config->snapdirseverywhere) {
 464                 int ret;
 465                 char *snapshot_path;
 466
 467                 snapshot_path = shadow_copy2_snapshot_path(talloc_tos(),
 468                                                            handle,
 469                                                            timestamp);
 470                 if (snapshot_path == NULL) {
 471                         goto fail;
 472                 }
 473
 474                 if (config->rel_connectpath == NULL) {
 475                         converted = talloc_asprintf(mem_ctx, "%s/%s",
 476                                                     snapshot_path, name);
 477                 } else {
 478                         converted = talloc_asprintf(mem_ctx, "%s/%s/%s",
 479                                                     snapshot_path,
 480                                                     config->rel_connectpath,
 481                                                     name);
 482                 }
 483                 if (converted == NULL) {
 484                         goto fail;
 485                 }
 486
 487                 ZERO_STRUCT(converted_fname);
 488                 converted_fname.base_name = converted;
 489
 490                 ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
 491                 DEBUG(10, ("Trying[not snapdirseverywhere] %s: %d (%s)\n",
 492                            converted,
 493                            ret, ret == 0 ? "ok" : strerror(errno)));
 494                 if (ret == 0) {
 495                         DEBUG(10, ("Found %s\n", converted));
 496                         result = converted;
 497                         converted = NULL;
 498                         if (snaproot_len != NULL) {
 499                                 *snaproot_len = strlen(snapshot_path);
 500                                 if (config->rel_connectpath != NULL) {
 501                                         *snaproot_len +=
 502                                             strlen(config->rel_connectpath) + 1;
 503                                 }
 504                         }
 505                         goto fail;
 506                 } else {
 507                         errno = ENOENT;
 508                         goto fail;
 509                 }
 510                 /* never reached ... */
 511         }
 512
 513         connectlen = strlen(handle->conn->connectpath);
 514         if (name[0] == 0) {
 515                 path = talloc_strdup(mem_ctx, handle->conn->connectpath);
 516         } else {
 517                 path = talloc_asprintf(
 518                         mem_ctx, "%s/%s", handle->conn->connectpath, name);
 519         }
 520         if (path == NULL) {
 521                 errno = ENOMEM;
 522                 goto fail;
 523         }
 524         pathlen = talloc_get_size(path)-1;
 525
 526         if (!shadow_copy2_find_slashes(talloc_tos(), path,
 527                                        &slashes, &num_slashes)) {
 528                 goto fail;
 529         }
 530
 531         insert = shadow_copy2_insert_string(talloc_tos(), handle, timestamp);
 532         if (insert == NULL) {
 533                 goto fail;
 534         }
 535         insertlen = talloc_get_size(insert)-1;
 536
 537         /*
 538          * Note: We deliberatly don't expensively initialize the
 539          * array with talloc_zero here: Putting zero into
 540          * converted[pathlen+insertlen] below is sufficient, because
 541          * in the following for loop, the insert string is inserted
 542          * at various slash places. So the memory up to position
 543          * pathlen+insertlen will always be initialized when the
 544          * converted string is used.
 545          */
 546         converted = talloc_array(mem_ctx, char, pathlen + insertlen + 1);
 547         if (converted == NULL) {
 548                 goto fail;
 549         }
 550
 551         if (path[pathlen-1] != '/') {
 552                 /*
 553                  * Append a fake slash to find the snapshot root
 554                  */
 555                 size_t *tmp;
 556                 tmp = talloc_realloc(talloc_tos(), slashes,
 557                                      size_t, num_slashes+1);
 558                 if (tmp == NULL) {
 559                         goto fail;
 560                 }
 561                 slashes = tmp;
 562                 slashes[num_slashes] = pathlen;
 563                 num_slashes += 1;
 564         }
 565
 566         min_offset = 0;
 567
 568         if (!config->crossmountpoints) {
 569                 min_offset = strlen(config->mount_point);
 570         }
 571
 572         memcpy(converted, path, pathlen+1);
 573         converted[pathlen+insertlen] = '\0';
 574
 575         ZERO_STRUCT(converted_fname);
 576         converted_fname.base_name = converted;
 577
 578         for (i = num_slashes-1; i>=0; i--) {
 579                 int ret;
 580                 size_t offset;
 581
 582                 offset = slashes[i];
 583
 584                 if (offset < min_offset) {
 585                         errno = ENOENT;
 586                         goto fail;
 587                 }
 588
 589                 if (offset >= connectlen) {
 590                         in_share_offset = offset;
 591                 }
 592
 593                 memcpy(converted+offset, insert, insertlen);
 594
 595                 offset += insertlen;
 596                 memcpy(converted+offset, path + slashes[i],
 597                        pathlen - slashes[i]);
 598
 599                 ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
 600
 601                 DEBUG(10, ("Trying[snapdirseverywhere] %s: %d (%s)\n",
 602                            converted,
 603                            ret, ret == 0 ? "ok" : strerror(errno)));
 604                 if (ret == 0) {
 605                         /* success */
 606                         if (snaproot_len != NULL) {
 607                                 *snaproot_len = in_share_offset + insertlen;
 608                         }
 609                         break;
 610                 }
 611                 if (errno == ENOTDIR) {
 612                         /*
 613                          * This is a valid condition: We appended the
 614                          * .snaphots/@GMT.. to a file name. Just try
 615                          * with the upper levels.
 616                          */
 617                         continue;
 618                 }
 619                 if (errno != ENOENT) {
 620                         /* Other problem than "not found" */
 621                         goto fail;
 622                 }
 623         }
 624
 625         if (i >= 0) {
 626                 /*
 627                  * Found something
 628                  */
 629                 DEBUG(10, ("Found %s\n", converted));
 630                 result = converted;
 631                 converted = NULL;
 632         } else {
 633                 errno = ENOENT;
 634         }
 635 fail:
 636         saved_errno = errno;
 637         TALLOC_FREE(converted);
 638         TALLOC_FREE(insert);
 639         TALLOC_FREE(slashes);
 640         TALLOC_FREE(path);
 641         errno = saved_errno;
 642         return result;
 643 }
 644
 645 /**
 646  * Convert from a name as handed in via the SMB layer
 647  * and a timestamp into the local path of the snapshot
 648  * of the provided file at the provided time.
 649  */
 650 static char *shadow_copy2_convert(TALLOC_CTX *mem_ctx,
 651                                   struct vfs_handle_struct *handle,
 652                                   const char *name, time_t timestamp)
 653 {
 654         return shadow_copy2_do_convert(mem_ctx, handle, name, timestamp, NULL);
 655 }
 656
 657 /*
 658   modify a sbuf return to ensure that inodes in the shadow directory
 659   are different from those in the main directory
 660  */
 661 static void convert_sbuf(vfs_handle_struct *handle, const char *fname,
 662                          SMB_STRUCT_STAT *sbuf)
 663 {
 664         struct shadow_copy2_config *config;
 665
 666         SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
 667                                 return);
 668
 669         if (config->fixinodes) {
 670                 /* some snapshot systems, like GPFS, return the name
 671                    device:inode for the snapshot files as the current
 672                    files. That breaks the 'restore' button in the shadow copy
 673                    GUI, as the client gets a sharing violation.
 674
 675                    This is a crude way of allowing both files to be
 676                    open at once. It has a slight chance of inode
 677                    number collision, but I can't see a better approach
 678                    without significant VFS changes
 679                 */
 680                 TDB_DATA key = { .dptr = discard_const_p(uint8_t, fname),
 681                                  .dsize = strlen(fname) };
 682                 uint32_t shash;
 683
 684                 shash = tdb_jenkins_hash(&key) & 0xFF000000;
 685                 if (shash == 0) {
 686                         shash = 1;
 687                 }
 688                 sbuf->st_ex_ino ^= shash;
 689         }
 690 }
 691
 692 static DIR *shadow_copy2_opendir(vfs_handle_struct *handle,
 693                         const struct smb_filename *smb_fname,
 694                         const char *mask,
 695                         uint32_t attr)
 696 {
 697         time_t timestamp;
 698         char *stripped;
 699         DIR *ret;
 700         int saved_errno;
 701         char *conv;
 702         struct smb_filename *conv_smb_fname = NULL;
 703
 704         if (!shadow_copy2_strip_snapshot(talloc_tos(),
 705                                 handle,
 706                                 smb_fname->base_name,
 707                                 &timestamp,
 708                                 &stripped)) {
 709                 return NULL;
 710         }
 711         if (timestamp == 0) {
 712                 return SMB_VFS_NEXT_OPENDIR(handle, smb_fname, mask, attr);
 713         }
 714         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
 715         TALLOC_FREE(stripped);
 716         if (conv == NULL) {
 717                 return NULL;
 718         }
 719         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
 720                                         conv,
 721                                         NULL,
 722                                         NULL);
 723         if (conv_smb_fname == NULL) {
 724                 TALLOC_FREE(conv);
 725                 return NULL;
 726         }
 727         ret = SMB_VFS_NEXT_OPENDIR(handle, conv_smb_fname, mask, attr);
 728         saved_errno = errno;
 729         TALLOC_FREE(conv);
 730         TALLOC_FREE(conv_smb_fname);
 731         errno = saved_errno;
 732         return ret;
 733 }
 734
 735 static int shadow_copy2_rename(vfs_handle_struct *handle,
 736                                const struct smb_filename *smb_fname_src,
 737                                const struct smb_filename *smb_fname_dst)
 738 {
 739         time_t timestamp_src, timestamp_dst;
 740
 741         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
 742                                          smb_fname_src->base_name,
 743                                          &timestamp_src, NULL)) {
 744                 return -1;
 745         }
 746         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
 747                                          smb_fname_dst->base_name,
 748                                          &timestamp_dst, NULL)) {
 749                 return -1;
 750         }
 751         if (timestamp_src != 0) {
 752                 errno = EXDEV;
 753                 return -1;
 754         }
 755         if (timestamp_dst != 0) {
 756                 errno = EROFS;
 757                 return -1;
 758         }
 759         return SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 760 }
 761
 762 static int shadow_copy2_symlink(vfs_handle_struct *handle,
 763                                 const char *oldname, const char *newname)
 764 {
 765         time_t timestamp_old, timestamp_new;
 766
 767         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, oldname,
 768                                          &timestamp_old, NULL)) {
 769                 return -1;
 770         }
 771         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, newname,
 772                                          &timestamp_new, NULL)) {
 773                 return -1;
 774         }
 775         if ((timestamp_old != 0) || (timestamp_new != 0)) {
 776                 errno = EROFS;
 777                 return -1;
 778         }
 779         return SMB_VFS_NEXT_SYMLINK(handle, oldname, newname);
 780 }
 781
 782 static int shadow_copy2_link(vfs_handle_struct *handle,
 783                              const char *oldname, const char *newname)
 784 {
 785         time_t timestamp_old, timestamp_new;
 786
 787         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, oldname,
 788                                          &timestamp_old, NULL)) {
 789                 return -1;
 790         }
 791         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, newname,
 792                                          &timestamp_new, NULL)) {
 793                 return -1;
 794         }
 795         if ((timestamp_old != 0) || (timestamp_new != 0)) {
 796                 errno = EROFS;
 797                 return -1;
 798         }
 799         return SMB_VFS_NEXT_LINK(handle, oldname, newname);
 800 }
 801
 802 static int shadow_copy2_stat(vfs_handle_struct *handle,
 803                              struct smb_filename *smb_fname)
 804 {
 805         time_t timestamp;
 806         char *stripped, *tmp;
 807         int ret, saved_errno;
 808
 809         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
 810                                          smb_fname->base_name,
 811                                          &timestamp, &stripped)) {
 812                 return -1;
 813         }
 814         if (timestamp == 0) {
 815                 return SMB_VFS_NEXT_STAT(handle, smb_fname);
 816         }
 817
 818         tmp = smb_fname->base_name;
 819         smb_fname->base_name = shadow_copy2_convert(
 820                 talloc_tos(), handle, stripped, timestamp);
 821         TALLOC_FREE(stripped);
 822
 823         if (smb_fname->base_name == NULL) {
 824                 smb_fname->base_name = tmp;
 825                 return -1;
 826         }
 827
 828         ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
 829         saved_errno = errno;
 830
 831         TALLOC_FREE(smb_fname->base_name);
 832         smb_fname->base_name = tmp;
 833
 834         if (ret == 0) {
 835                 convert_sbuf(handle, smb_fname->base_name, &smb_fname->st);
 836         }
 837         errno = saved_errno;
 838         return ret;
 839 }
 840
 841 static int shadow_copy2_lstat(vfs_handle_struct *handle,
 842                               struct smb_filename *smb_fname)
 843 {
 844         time_t timestamp;
 845         char *stripped, *tmp;
 846         int ret, saved_errno;
 847
 848         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
 849                                          smb_fname->base_name,
 850                                          &timestamp, &stripped)) {
 851                 return -1;
 852         }
 853         if (timestamp == 0) {
 854                 return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
 855         }
 856
 857         tmp = smb_fname->base_name;
 858         smb_fname->base_name = shadow_copy2_convert(
 859                 talloc_tos(), handle, stripped, timestamp);
 860         TALLOC_FREE(stripped);
 861
 862         if (smb_fname->base_name == NULL) {
 863                 smb_fname->base_name = tmp;
 864                 return -1;
 865         }
 866
 867         ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
 868         saved_errno = errno;
 869
 870         TALLOC_FREE(smb_fname->base_name);
 871         smb_fname->base_name = tmp;
 872
 873         if (ret == 0) {
 874                 convert_sbuf(handle, smb_fname->base_name, &smb_fname->st);
 875         }
 876         errno = saved_errno;
 877         return ret;
 878 }
 879
 880 static int shadow_copy2_fstat(vfs_handle_struct *handle, files_struct *fsp,
 881                               SMB_STRUCT_STAT *sbuf)
 882 {
 883         time_t timestamp;
 884         int ret;
 885
 886         ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
 887         if (ret == -1) {
 888                 return ret;
 889         }
 890         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
 891                                          fsp->fsp_name->base_name,
 892                                          &timestamp, NULL)) {
 893                 return 0;
 894         }
 895         if (timestamp != 0) {
 896                 convert_sbuf(handle, fsp->fsp_name->base_name, sbuf);
 897         }
 898         return 0;
 899 }
 900
 901 static int shadow_copy2_open(vfs_handle_struct *handle,
 902                              struct smb_filename *smb_fname, files_struct *fsp,
 903                              int flags, mode_t mode)
 904 {
 905         time_t timestamp;
 906         char *stripped, *tmp;
 907         int ret, saved_errno;
 908
 909         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
 910                                          smb_fname->base_name,
 911                                          &timestamp, &stripped)) {
 912                 return -1;
 913         }
 914         if (timestamp == 0) {
 915                 return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 916         }
 917
 918         tmp = smb_fname->base_name;
 919         smb_fname->base_name = shadow_copy2_convert(
 920                 talloc_tos(), handle, stripped, timestamp);
 921         TALLOC_FREE(stripped);
 922
 923         if (smb_fname->base_name == NULL) {
 924                 smb_fname->base_name = tmp;
 925                 return -1;
 926         }
 927
 928         ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 929         saved_errno = errno;
 930
 931         TALLOC_FREE(smb_fname->base_name);
 932         smb_fname->base_name = tmp;
 933
 934         errno = saved_errno;
 935         return ret;
 936 }
 937
 938 static int shadow_copy2_unlink(vfs_handle_struct *handle,
 939                                const struct smb_filename *smb_fname)
 940 {
 941         time_t timestamp;
 942         char *stripped;
 943         int ret, saved_errno;
 944         struct smb_filename *conv;
 945
 946         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
 947                                          smb_fname->base_name,
 948                                          &timestamp, &stripped)) {
 949                 return -1;
 950         }
 951         if (timestamp == 0) {
 952                 return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 953         }
 954         conv = cp_smb_filename(talloc_tos(), smb_fname);
 955         if (conv == NULL) {
 956                 errno = ENOMEM;
 957                 return -1;
 958         }
 959         conv->base_name = shadow_copy2_convert(
 960                 conv, handle, stripped, timestamp);
 961         TALLOC_FREE(stripped);
 962         if (conv->base_name == NULL) {
 963                 return -1;
 964         }
 965         ret = SMB_VFS_NEXT_UNLINK(handle, conv);
 966         saved_errno = errno;
 967         TALLOC_FREE(conv);
 968         errno = saved_errno;
 969         return ret;
 970 }
 971
 972 static int shadow_copy2_chmod(vfs_handle_struct *handle,
 973                         const struct smb_filename *smb_fname,
 974                         mode_t mode)
 975 {
 976         time_t timestamp;
 977         char *stripped = NULL;
 978         int ret, saved_errno;
 979         char *conv = NULL;
 980         struct smb_filename *conv_smb_fname;
 981
 982         if (!shadow_copy2_strip_snapshot(talloc_tos(),
 983                                 handle,
 984                                 smb_fname->base_name,
 985                                 &timestamp,
 986                                 &stripped)) {
 987                 return -1;
 988         }
 989         if (timestamp == 0) {
 990                 TALLOC_FREE(stripped);
 991                 return SMB_VFS_NEXT_CHMOD(handle, smb_fname, mode);
 992         }
 993         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
 994         TALLOC_FREE(stripped);
 995         if (conv == NULL) {
 996                 return -1;
 997         }
 998         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
 999                                         conv,
1000                                         NULL,
1001                                         NULL);
1002         if (conv_smb_fname == NULL) {
1003                 TALLOC_FREE(conv);
1004                 errno = ENOMEM;
1005                 return -1;
1006         }
1007
1008         ret = SMB_VFS_NEXT_CHMOD(handle, conv_smb_fname, mode);
1009         saved_errno = errno;
1010         TALLOC_FREE(conv);
1011         TALLOC_FREE(conv_smb_fname);
1012         errno = saved_errno;
1013         return ret;
1014 }
1015
1016 static int shadow_copy2_chown(vfs_handle_struct *handle, const char *fname,
1017                               uid_t uid, gid_t gid)
1018 {
1019         time_t timestamp;
1020         char *stripped;
1021         int ret, saved_errno;
1022         char *conv;
1023
1024         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1025                                          &timestamp, &stripped)) {
1026                 return -1;
1027         }
1028         if (timestamp == 0) {
1029                 return SMB_VFS_NEXT_CHOWN(handle, fname, uid, gid);
1030         }
1031         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1032         TALLOC_FREE(stripped);
1033         if (conv == NULL) {
1034                 return -1;
1035         }
1036         ret = SMB_VFS_NEXT_CHOWN(handle, conv, uid, gid);
1037         saved_errno = errno;
1038         TALLOC_FREE(conv);
1039         errno = saved_errno;
1040         return ret;
1041 }
1042
1043 static int shadow_copy2_chdir(vfs_handle_struct *handle,
1044                               const char *fname)
1045 {
1046         time_t timestamp;
1047         char *stripped;
1048         int ret, saved_errno;
1049         char *conv;
1050
1051         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1052                                          &timestamp, &stripped)) {
1053                 return -1;
1054         }
1055         if (timestamp == 0) {
1056                 return SMB_VFS_NEXT_CHDIR(handle, fname);
1057         }
1058         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1059         TALLOC_FREE(stripped);
1060         if (conv == NULL) {
1061                 return -1;
1062         }
1063         ret = SMB_VFS_NEXT_CHDIR(handle, conv);
1064         saved_errno = errno;
1065         TALLOC_FREE(conv);
1066         errno = saved_errno;
1067         return ret;
1068 }
1069
1070 static int shadow_copy2_ntimes(vfs_handle_struct *handle,
1071                                const struct smb_filename *smb_fname,
1072                                struct smb_file_time *ft)
1073 {
1074         time_t timestamp;
1075         char *stripped;
1076         int ret, saved_errno;
1077         struct smb_filename *conv;
1078
1079         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1080                                          smb_fname->base_name,
1081                                          &timestamp, &stripped)) {
1082                 return -1;
1083         }
1084         if (timestamp == 0) {
1085                 return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft);
1086         }
1087         conv = cp_smb_filename(talloc_tos(), smb_fname);
1088         if (conv == NULL) {
1089                 errno = ENOMEM;
1090                 return -1;
1091         }
1092         conv->base_name = shadow_copy2_convert(
1093                 conv, handle, stripped, timestamp);
1094         TALLOC_FREE(stripped);
1095         if (conv->base_name == NULL) {
1096                 return -1;
1097         }
1098         ret = SMB_VFS_NEXT_NTIMES(handle, conv, ft);
1099         saved_errno = errno;
1100         TALLOC_FREE(conv);
1101         errno = saved_errno;
1102         return ret;
1103 }
1104
1105 static int shadow_copy2_readlink(vfs_handle_struct *handle,
1106                                  const char *fname, char *buf, size_t bufsiz)
1107 {
1108         time_t timestamp;
1109         char *stripped;
1110         int ret, saved_errno;
1111         char *conv;
1112
1113         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1114                                          &timestamp, &stripped)) {
1115                 return -1;
1116         }
1117         if (timestamp == 0) {
1118                 return SMB_VFS_NEXT_READLINK(handle, fname, buf, bufsiz);
1119         }
1120         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1121         TALLOC_FREE(stripped);
1122         if (conv == NULL) {
1123                 return -1;
1124         }
1125         ret = SMB_VFS_NEXT_READLINK(handle, conv, buf, bufsiz);
1126         saved_errno = errno;
1127         TALLOC_FREE(conv);
1128         errno = saved_errno;
1129         return ret;
1130 }
1131
1132 static int shadow_copy2_mknod(vfs_handle_struct *handle,
1133                               const char *fname, mode_t mode, SMB_DEV_T dev)
1134 {
1135         time_t timestamp;
1136         char *stripped;
1137         int ret, saved_errno;
1138         char *conv;
1139
1140         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1141                                          &timestamp, &stripped)) {
1142                 return -1;
1143         }
1144         if (timestamp == 0) {
1145                 return SMB_VFS_NEXT_MKNOD(handle, fname, mode, dev);
1146         }
1147         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1148         TALLOC_FREE(stripped);
1149         if (conv == NULL) {
1150                 return -1;
1151         }
1152         ret = SMB_VFS_NEXT_MKNOD(handle, conv, mode, dev);
1153         saved_errno = errno;
1154         TALLOC_FREE(conv);
1155         errno = saved_errno;
1156         return ret;
1157 }
1158
1159 static char *shadow_copy2_realpath(vfs_handle_struct *handle,
1160                                    const char *fname)
1161 {
1162         time_t timestamp;
1163         char *stripped = NULL;
1164         char *tmp = NULL;
1165         char *result = NULL;
1166         int saved_errno;
1167
1168         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1169                                          &timestamp, &stripped)) {
1170                 goto done;
1171         }
1172         if (timestamp == 0) {
1173                 return SMB_VFS_NEXT_REALPATH(handle, fname);
1174         }
1175
1176         tmp = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1177         if (tmp == NULL) {
1178                 goto done;
1179         }
1180
1181         result = SMB_VFS_NEXT_REALPATH(handle, tmp);
1182
1183 done:
1184         saved_errno = errno;
1185         TALLOC_FREE(tmp);
1186         TALLOC_FREE(stripped);
1187         errno = saved_errno;
1188         return result;
1189 }
1190
1191 /**
1192  * Check whether a given directory contains a
1193  * snapshot directory as direct subdirectory.
1194  * If yes, return the path of the snapshot-subdir,
1195  * otherwise return NULL.
1196  */
1197 static char *have_snapdir(struct vfs_handle_struct *handle,
1198                           const char *path)
1199 {
1200         struct smb_filename smb_fname;
1201         int ret;
1202         struct shadow_copy2_config *config;
1203
1204         SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
1205                                 return NULL);
1206
1207         ZERO_STRUCT(smb_fname);
1208         smb_fname.base_name = talloc_asprintf(talloc_tos(), "%s/%s",
1209                                               path, config->snapdir);
1210         if (smb_fname.base_name == NULL) {
1211                 return NULL;
1212         }
1213
1214         ret = SMB_VFS_NEXT_STAT(handle, &smb_fname);
1215         if ((ret == 0) && (S_ISDIR(smb_fname.st.st_ex_mode))) {
1216                 return smb_fname.base_name;
1217         }
1218         TALLOC_FREE(smb_fname.base_name);
1219         return NULL;
1220 }
1221
1222 static bool check_access_snapdir(struct vfs_handle_struct *handle,
1223                                 const char *path)
1224 {
1225         struct smb_filename smb_fname;
1226         int ret;
1227         NTSTATUS status;
1228
1229         ZERO_STRUCT(smb_fname);
1230         smb_fname.base_name = talloc_asprintf(talloc_tos(),
1231                                                 "%s",
1232                                                 path);
1233         if (smb_fname.base_name == NULL) {
1234                 return false;
1235         }
1236
1237         ret = SMB_VFS_NEXT_STAT(handle, &smb_fname);
1238         if (ret != 0 || !S_ISDIR(smb_fname.st.st_ex_mode)) {
1239                 TALLOC_FREE(smb_fname.base_name);
1240                 return false;
1241         }
1242
1243         status = smbd_check_access_rights(handle->conn,
1244                                         &smb_fname,
1245                                         false,
1246                                         SEC_DIR_LIST);
1247         if (!NT_STATUS_IS_OK(status)) {
1248                 DEBUG(0,("user does not have list permission "
1249                         "on snapdir %s\n",
1250                         smb_fname.base_name));
1251                 TALLOC_FREE(smb_fname.base_name);
1252                 return false;
1253         }
1254         TALLOC_FREE(smb_fname.base_name);
1255         return true;
1256 }
1257
1258 /**
1259  * Find the snapshot directory (if any) for the given
1260  * filename (which is relative to the share).
1261  */
1262 static const char *shadow_copy2_find_snapdir(TALLOC_CTX *mem_ctx,
1263                                              struct vfs_handle_struct *handle,
1264                                              struct smb_filename *smb_fname)
1265 {
1266         char *path, *p;
1267         const char *snapdir;
1268         struct shadow_copy2_config *config;
1269
1270         SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
1271                                 return NULL);
1272
1273         /*
1274          * If the non-snapdisrseverywhere mode, we should not search!
1275          */
1276         if (!config->snapdirseverywhere) {
1277                 return config->snapshot_basepath;
1278         }
1279
1280         path = talloc_asprintf(mem_ctx, "%s/%s",
1281                                handle->conn->connectpath,
1282                                smb_fname->base_name);
1283         if (path == NULL) {
1284                 return NULL;
1285         }
1286
1287         snapdir = have_snapdir(handle, path);
1288         if (snapdir != NULL) {
1289                 TALLOC_FREE(path);
1290                 return snapdir;
1291         }
1292
1293         while ((p = strrchr(path, '/')) && (p > path)) {
1294
1295                 p[0] = '\0';
1296
1297                 snapdir = have_snapdir(handle, path);
1298                 if (snapdir != NULL) {
1299                         TALLOC_FREE(path);
1300                         return snapdir;
1301                 }
1302         }
1303         TALLOC_FREE(path);
1304         return NULL;
1305 }
1306
1307 static bool shadow_copy2_snapshot_to_gmt(vfs_handle_struct *handle,
1308                                          const char *name,
1309                                          char *gmt, size_t gmt_len)
1310 {
1311         struct tm timestamp;
1312         time_t timestamp_t;
1313         unsigned long int timestamp_long;
1314         const char *fmt;
1315         struct shadow_copy2_config *config;
1316
1317         SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
1318                                 return NULL);
1319
1320         fmt = config->gmt_format;
1321
1322         ZERO_STRUCT(timestamp);
1323         if (config->use_sscanf) {
1324                 if (sscanf(name, fmt, &timestamp_long) != 1) {
1325                         DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
1326                                    "no sscanf match %s: %s\n",
1327                                    fmt, name));
1328                         return false;
1329                 }
1330                 timestamp_t = timestamp_long;
1331                 gmtime_r(&timestamp_t, &timestamp);
1332         } else {
1333                 if (strptime(name, fmt, &timestamp) == NULL) {
1334                         DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
1335                                    "no match %s: %s\n",
1336                                    fmt, name));
1337                         return false;
1338                 }
1339                 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: match %s: %s\n",
1340                            fmt, name));
1341
1342                 if (config->use_localtime) {
1343                         timestamp.tm_isdst = -1;
1344                         timestamp_t = mktime(&timestamp);
1345                         gmtime_r(&timestamp_t, &timestamp);
1346                 }
1347         }
1348
1349         strftime(gmt, gmt_len, GMT_FORMAT, &timestamp);
1350         return true;
1351 }
1352
1353 static int shadow_copy2_label_cmp_asc(const void *x, const void *y)
1354 {
1355         return strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
1356 }
1357
1358 static int shadow_copy2_label_cmp_desc(const void *x, const void *y)
1359 {
1360         return -strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
1361 }
1362
1363 /*
1364   sort the shadow copy data in ascending or descending order
1365  */
1366 static void shadow_copy2_sort_data(vfs_handle_struct *handle,
1367                                    struct shadow_copy_data *shadow_copy2_data)
1368 {
1369         int (*cmpfunc)(const void *, const void *);
1370         const char *sort;
1371         struct shadow_copy2_config *config;
1372
1373         SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
1374                                 return);
1375
1376         sort = config->sort_order;
1377         if (sort == NULL) {
1378                 return;
1379         }
1380
1381         if (strcmp(sort, "asc") == 0) {
1382                 cmpfunc = shadow_copy2_label_cmp_asc;
1383         } else if (strcmp(sort, "desc") == 0) {
1384                 cmpfunc = shadow_copy2_label_cmp_desc;
1385         } else {
1386                 return;
1387         }
1388
1389         if (shadow_copy2_data && shadow_copy2_data->num_volumes > 0 &&
1390             shadow_copy2_data->labels)
1391         {
1392                 TYPESAFE_QSORT(shadow_copy2_data->labels,
1393                                shadow_copy2_data->num_volumes,
1394                                cmpfunc);
1395         }
1396 }
1397
1398 static int shadow_copy2_get_shadow_copy_data(
1399         vfs_handle_struct *handle, files_struct *fsp,
1400         struct shadow_copy_data *shadow_copy2_data,
1401         bool labels)
1402 {
1403         DIR *p;
1404         const char *snapdir;
1405         struct smb_filename *snapdir_smb_fname = NULL;
1406         struct dirent *d;
1407         TALLOC_CTX *tmp_ctx = talloc_stackframe();
1408         bool ret;
1409
1410         snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle, fsp->fsp_name);
1411         if (snapdir == NULL) {
1412                 DEBUG(0,("shadow:snapdir not found for %s in get_shadow_copy_data\n",
1413                          handle->conn->connectpath));
1414                 errno = EINVAL;
1415                 talloc_free(tmp_ctx);
1416                 return -1;
1417         }
1418         ret = check_access_snapdir(handle, snapdir);
1419         if (!ret) {
1420                 DEBUG(0,("access denied on listing snapdir %s\n", snapdir));
1421                 errno = EACCES;
1422                 talloc_free(tmp_ctx);
1423                 return -1;
1424         }
1425
1426         snapdir_smb_fname = synthetic_smb_fname(talloc_tos(),
1427                                         snapdir,
1428                                         NULL,
1429                                         NULL);
1430         if (snapdir_smb_fname == NULL) {
1431                 errno = ENOMEM;
1432                 talloc_free(tmp_ctx);
1433                 return -1;
1434         }
1435
1436         p = SMB_VFS_NEXT_OPENDIR(handle, snapdir_smb_fname, NULL, 0);
1437
1438         if (!p) {
1439                 DEBUG(2,("shadow_copy2: SMB_VFS_NEXT_OPENDIR() failed for '%s'"
1440                          " - %s\n", snapdir, strerror(errno)));
1441                 talloc_free(tmp_ctx);
1442                 errno = ENOSYS;
1443                 return -1;
1444         }
1445
1446         shadow_copy2_data->num_volumes = 0;
1447         shadow_copy2_data->labels      = NULL;
1448
1449         while ((d = SMB_VFS_NEXT_READDIR(handle, p, NULL))) {
1450                 char snapshot[GMT_NAME_LEN+1];
1451                 SHADOW_COPY_LABEL *tlabels;
1452
1453                 /*
1454                  * ignore names not of the right form in the snapshot
1455                  * directory
1456                  */
1457                 if (!shadow_copy2_snapshot_to_gmt(
1458                             handle, d->d_name,
1459                             snapshot, sizeof(snapshot))) {
1460
1461                         DEBUG(6, ("shadow_copy2_get_shadow_copy_data: "
1462                                   "ignoring %s\n", d->d_name));
1463                         continue;
1464                 }
1465                 DEBUG(6,("shadow_copy2_get_shadow_copy_data: %s -> %s\n",
1466                          d->d_name, snapshot));
1467
1468                 if (!labels) {
1469                         /* the caller doesn't want the labels */
1470                         shadow_copy2_data->num_volumes++;
1471                         continue;
1472                 }
1473
1474                 tlabels = talloc_realloc(shadow_copy2_data,
1475                                          shadow_copy2_data->labels,
1476                                          SHADOW_COPY_LABEL,
1477                                          shadow_copy2_data->num_volumes+1);
1478                 if (tlabels == NULL) {
1479                         DEBUG(0,("shadow_copy2: out of memory\n"));
1480                         SMB_VFS_NEXT_CLOSEDIR(handle, p);
1481                         talloc_free(tmp_ctx);
1482                         return -1;
1483                 }
1484
1485                 strlcpy(tlabels[shadow_copy2_data->num_volumes], snapshot,
1486                         sizeof(*tlabels));
1487
1488                 shadow_copy2_data->num_volumes++;
1489                 shadow_copy2_data->labels = tlabels;
1490         }
1491
1492         SMB_VFS_NEXT_CLOSEDIR(handle,p);
1493
1494         shadow_copy2_sort_data(handle, shadow_copy2_data);
1495
1496         talloc_free(tmp_ctx);
1497         return 0;
1498 }
1499
1500 static NTSTATUS shadow_copy2_fget_nt_acl(vfs_handle_struct *handle,
1501                                         struct files_struct *fsp,
1502                                         uint32_t security_info,
1503                                          TALLOC_CTX *mem_ctx,
1504                                         struct security_descriptor **ppdesc)
1505 {
1506         time_t timestamp;
1507         char *stripped;
1508         NTSTATUS status;
1509         char *conv;
1510         struct smb_filename *smb_fname = NULL;
1511
1512         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1513                                          fsp->fsp_name->base_name,
1514                                          &timestamp, &stripped)) {
1515                 return map_nt_error_from_unix(errno);
1516         }
1517         if (timestamp == 0) {
1518                 return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info,
1519                                                 mem_ctx,
1520                                                 ppdesc);
1521         }
1522         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1523         TALLOC_FREE(stripped);
1524         if (conv == NULL) {
1525                 return map_nt_error_from_unix(errno);
1526         }
1527         smb_fname = synthetic_smb_fname(talloc_tos(),
1528                                         conv,
1529                                         NULL,
1530                                         NULL);
1531         if (smb_fname == NULL) {
1532                 TALLOC_FREE(conv);
1533                 return NT_STATUS_NO_MEMORY;
1534         }
1535
1536         status = SMB_VFS_NEXT_GET_NT_ACL(handle, smb_fname, security_info,
1537                                          mem_ctx, ppdesc);
1538         TALLOC_FREE(conv);
1539         TALLOC_FREE(smb_fname);
1540         return status;
1541 }
1542
1543 static NTSTATUS shadow_copy2_get_nt_acl(vfs_handle_struct *handle,
1544                                         const struct smb_filename *smb_fname,
1545                                         uint32_t security_info,
1546                                         TALLOC_CTX *mem_ctx,
1547                                         struct security_descriptor **ppdesc)
1548 {
1549         time_t timestamp;
1550         char *stripped;
1551         NTSTATUS status;
1552         char *conv;
1553         struct smb_filename *conv_smb_fname = NULL;
1554
1555         if (!shadow_copy2_strip_snapshot(talloc_tos(),
1556                                         handle,
1557                                         smb_fname->base_name,
1558                                         &timestamp,
1559                                         &stripped)) {
1560                 return map_nt_error_from_unix(errno);
1561         }
1562         if (timestamp == 0) {
1563                 return SMB_VFS_NEXT_GET_NT_ACL(handle, smb_fname, security_info,
1564                                                mem_ctx, ppdesc);
1565         }
1566         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1567         TALLOC_FREE(stripped);
1568         if (conv == NULL) {
1569                 return map_nt_error_from_unix(errno);
1570         }
1571         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1572                                         conv,
1573                                         NULL,
1574                                         NULL);
1575         if (conv_smb_fname == NULL) {
1576                 TALLOC_FREE(conv);
1577                 return NT_STATUS_NO_MEMORY;
1578         }
1579         status = SMB_VFS_NEXT_GET_NT_ACL(handle, conv_smb_fname, security_info,
1580                                          mem_ctx, ppdesc);
1581         TALLOC_FREE(conv);
1582         TALLOC_FREE(conv_smb_fname);
1583         return status;
1584 }
1585
1586 static int shadow_copy2_mkdir(vfs_handle_struct *handle,
1587                                 const struct smb_filename *smb_fname,
1588                                 mode_t mode)
1589 {
1590         time_t timestamp;
1591         char *stripped;
1592         int ret, saved_errno;
1593         char *conv;
1594         struct smb_filename *conv_smb_fname = NULL;
1595
1596         if (!shadow_copy2_strip_snapshot(talloc_tos(),
1597                                         handle,
1598                                         smb_fname->base_name,
1599                                         &timestamp,
1600                                         &stripped)) {
1601                 return -1;
1602         }
1603         if (timestamp == 0) {
1604                 return SMB_VFS_NEXT_MKDIR(handle, smb_fname, mode);
1605         }
1606         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1607         TALLOC_FREE(stripped);
1608         if (conv == NULL) {
1609                 return -1;
1610         }
1611         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1612                                         conv,
1613                                         NULL,
1614                                         NULL);
1615         if (conv_smb_fname == NULL) {
1616                 TALLOC_FREE(conv);
1617                 return -1;
1618         }
1619         ret = SMB_VFS_NEXT_MKDIR(handle, conv_smb_fname, mode);
1620         saved_errno = errno;
1621         TALLOC_FREE(conv);
1622         TALLOC_FREE(conv_smb_fname);
1623         errno = saved_errno;
1624         return ret;
1625 }
1626
1627 static int shadow_copy2_rmdir(vfs_handle_struct *handle,
1628                                 const struct smb_filename *smb_fname)
1629 {
1630         time_t timestamp;
1631         char *stripped;
1632         int ret, saved_errno;
1633         char *conv;
1634         struct smb_filename *conv_smb_fname = NULL;
1635
1636         if (!shadow_copy2_strip_snapshot(talloc_tos(),
1637                                         handle,
1638                                         smb_fname->base_name,
1639                                         &timestamp,
1640                                         &stripped)) {
1641                 return -1;
1642         }
1643         if (timestamp == 0) {
1644                 return SMB_VFS_NEXT_RMDIR(handle, smb_fname);
1645         }
1646         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1647         TALLOC_FREE(stripped);
1648         if (conv == NULL) {
1649                 return -1;
1650         }
1651         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1652                                         conv,
1653                                         NULL,
1654                                         NULL);
1655         if (conv_smb_fname == NULL) {
1656                 TALLOC_FREE(conv);
1657                 return -1;
1658         }
1659         ret = SMB_VFS_NEXT_RMDIR(handle, conv_smb_fname);
1660         saved_errno = errno;
1661         TALLOC_FREE(conv_smb_fname);
1662         TALLOC_FREE(conv);
1663         errno = saved_errno;
1664         return ret;
1665 }
1666
1667 static int shadow_copy2_chflags(vfs_handle_struct *handle, const char *fname,
1668                                 unsigned int flags)
1669 {
1670         time_t timestamp;
1671         char *stripped;
1672         int ret, saved_errno;
1673         char *conv;
1674
1675         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1676                                          &timestamp, &stripped)) {
1677                 return -1;
1678         }
1679         if (timestamp == 0) {
1680                 return SMB_VFS_NEXT_CHFLAGS(handle, fname, flags);
1681         }
1682         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1683         TALLOC_FREE(stripped);
1684         if (conv == NULL) {
1685                 return -1;
1686         }
1687         ret = SMB_VFS_NEXT_CHFLAGS(handle, conv, flags);
1688         saved_errno = errno;
1689         TALLOC_FREE(conv);
1690         errno = saved_errno;
1691         return ret;
1692 }
1693
1694 static ssize_t shadow_copy2_getxattr(vfs_handle_struct *handle,
1695                                      const char *fname, const char *aname,
1696                                      void *value, size_t size)
1697 {
1698         time_t timestamp;
1699         char *stripped;
1700         ssize_t ret;
1701         int saved_errno;
1702         char *conv;
1703
1704         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1705                                          &timestamp, &stripped)) {
1706                 return -1;
1707         }
1708         if (timestamp == 0) {
1709                 return SMB_VFS_NEXT_GETXATTR(handle, fname, aname, value,
1710                                              size);
1711         }
1712         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1713         TALLOC_FREE(stripped);
1714         if (conv == NULL) {
1715                 return -1;
1716         }
1717         ret = SMB_VFS_NEXT_GETXATTR(handle, conv, aname, value, size);
1718         saved_errno = errno;
1719         TALLOC_FREE(conv);
1720         errno = saved_errno;
1721         return ret;
1722 }
1723
1724 static ssize_t shadow_copy2_listxattr(struct vfs_handle_struct *handle,
1725                                       const char *fname,
1726                                       char *list, size_t size)
1727 {
1728         time_t timestamp;
1729         char *stripped;
1730         ssize_t ret;
1731         int saved_errno;
1732         char *conv;
1733
1734         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1735                                          &timestamp, &stripped)) {
1736                 return -1;
1737         }
1738         if (timestamp == 0) {
1739                 return SMB_VFS_NEXT_LISTXATTR(handle, fname, list, size);
1740         }
1741         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1742         TALLOC_FREE(stripped);
1743         if (conv == NULL) {
1744                 return -1;
1745         }
1746         ret = SMB_VFS_NEXT_LISTXATTR(handle, conv, list, size);
1747         saved_errno = errno;
1748         TALLOC_FREE(conv);
1749         errno = saved_errno;
1750         return ret;
1751 }
1752
1753 static int shadow_copy2_removexattr(vfs_handle_struct *handle,
1754                                     const char *fname, const char *aname)
1755 {
1756         time_t timestamp;
1757         char *stripped;
1758         int ret, saved_errno;
1759         char *conv;
1760
1761         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1762                                          &timestamp, &stripped)) {
1763                 return -1;
1764         }
1765         if (timestamp == 0) {
1766                 return SMB_VFS_NEXT_REMOVEXATTR(handle, fname, aname);
1767         }
1768         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1769         TALLOC_FREE(stripped);
1770         if (conv == NULL) {
1771                 return -1;
1772         }
1773         ret = SMB_VFS_NEXT_REMOVEXATTR(handle, conv, aname);
1774         saved_errno = errno;
1775         TALLOC_FREE(conv);
1776         errno = saved_errno;
1777         return ret;
1778 }
1779
1780 static int shadow_copy2_setxattr(struct vfs_handle_struct *handle,
1781                                  const char *fname,
1782                                  const char *aname, const void *value,
1783                                  size_t size, int flags)
1784 {
1785         time_t timestamp;
1786         char *stripped;
1787         ssize_t ret;
1788         int saved_errno;
1789         char *conv;
1790
1791         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1792                                          &timestamp, &stripped)) {
1793                 return -1;
1794         }
1795         if (timestamp == 0) {
1796                 return SMB_VFS_NEXT_SETXATTR(handle, fname, aname, value, size,
1797                                              flags);
1798         }
1799         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1800         TALLOC_FREE(stripped);
1801         if (conv == NULL) {
1802                 return -1;
1803         }
1804         ret = SMB_VFS_NEXT_SETXATTR(handle, conv, aname, value, size, flags);
1805         saved_errno = errno;
1806         TALLOC_FREE(conv);
1807         errno = saved_errno;
1808         return ret;
1809 }
1810
1811 static int shadow_copy2_chmod_acl(vfs_handle_struct *handle,
1812                         const struct smb_filename *smb_fname,
1813                         mode_t mode)
1814 {
1815         time_t timestamp;
1816         char *stripped;
1817         ssize_t ret;
1818         int saved_errno;
1819         char *conv = NULL;
1820         struct smb_filename *conv_smb_fname = NULL;
1821
1822         if (!shadow_copy2_strip_snapshot(talloc_tos(),
1823                                 handle,
1824                                 smb_fname->base_name,
1825                                 &timestamp,
1826                                 &stripped)) {
1827                 return -1;
1828         }
1829         if (timestamp == 0) {
1830                 return SMB_VFS_NEXT_CHMOD_ACL(handle, smb_fname, mode);
1831         }
1832         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1833         TALLOC_FREE(stripped);
1834         if (conv == NULL) {
1835                 return -1;
1836         }
1837         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1838                                         conv,
1839                                         NULL,
1840                                         NULL);
1841         if (conv_smb_fname == NULL) {
1842                 TALLOC_FREE(conv);
1843                 errno = ENOMEM;
1844                 return -1;
1845         }
1846         ret = SMB_VFS_NEXT_CHMOD_ACL(handle, conv_smb_fname, mode);
1847         saved_errno = errno;
1848         TALLOC_FREE(conv);
1849         TALLOC_FREE(conv_smb_fname);
1850         errno = saved_errno;
1851         return ret;
1852 }
1853
1854 static int shadow_copy2_get_real_filename(struct vfs_handle_struct *handle,
1855                                           const char *path,
1856                                           const char *name,
1857                                           TALLOC_CTX *mem_ctx,
1858                                           char **found_name)
1859 {
1860         time_t timestamp;
1861         char *stripped;
1862         ssize_t ret;
1863         int saved_errno;
1864         char *conv;
1865
1866         DEBUG(10, ("shadow_copy2_get_real_filename called for path=[%s], "
1867                    "name=[%s]\n", path, name));
1868
1869         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, path,
1870                                          &timestamp, &stripped)) {
1871                 DEBUG(10, ("shadow_copy2_strip_snapshot failed\n"));
1872                 return -1;
1873         }
1874         if (timestamp == 0) {
1875                 DEBUG(10, ("timestamp == 0\n"));
1876                 return SMB_VFS_NEXT_GET_REAL_FILENAME(handle, path, name,
1877                                                       mem_ctx, found_name);
1878         }
1879         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1880         TALLOC_FREE(stripped);
1881         if (conv == NULL) {
1882                 DEBUG(10, ("shadow_copy2_convert failed\n"));
1883                 return -1;
1884         }
1885         DEBUG(10, ("Calling NEXT_GET_REAL_FILE_NAME for conv=[%s], "
1886                    "name=[%s]\n", conv, name));
1887         ret = SMB_VFS_NEXT_GET_REAL_FILENAME(handle, conv, name,
1888                                              mem_ctx, found_name);
1889         DEBUG(10, ("NEXT_REAL_FILE_NAME returned %d\n", (int)ret));
1890         saved_errno = errno;
1891         TALLOC_FREE(conv);
1892         errno = saved_errno;
1893         return ret;
1894 }
1895
1896 static const char *shadow_copy2_connectpath(struct vfs_handle_struct *handle,
1897                                             const char *fname)
1898 {
1899         time_t timestamp;
1900         char *stripped = NULL;
1901         char *tmp = NULL;
1902         char *result = NULL;
1903         int saved_errno;
1904         size_t rootpath_len = 0;
1905
1906         DBG_DEBUG("Calc connect path for [%s]\n", fname);
1907
1908         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1909                                          &timestamp, &stripped)) {
1910                 goto done;
1911         }
1912         if (timestamp == 0) {
1913                 return SMB_VFS_NEXT_CONNECTPATH(handle, fname);
1914         }
1915
1916         tmp = shadow_copy2_do_convert(talloc_tos(), handle, stripped, timestamp,
1917                                       &rootpath_len);
1918         if (tmp == NULL) {
1919                 goto done;
1920         }
1921
1922         DBG_DEBUG("converted path is [%s] root path is [%.*s]\n", tmp,
1923                   (int)rootpath_len, tmp);
1924
1925         tmp[rootpath_len] = '\0';
1926         result = SMB_VFS_NEXT_REALPATH(handle, tmp);
1927         if (result == NULL) {
1928                 goto done;
1929         }
1930
1931         DBG_DEBUG("connect path is [%s]\n", result);
1932
1933 done:
1934         saved_errno = errno;
1935         TALLOC_FREE(tmp);
1936         TALLOC_FREE(stripped);
1937         errno = saved_errno;
1938         return result;
1939 }
1940
1941 static uint64_t shadow_copy2_disk_free(vfs_handle_struct *handle,
1942                                        const char *path, uint64_t *bsize,
1943                                        uint64_t *dfree, uint64_t *dsize)
1944 {
1945         time_t timestamp;
1946         char *stripped;
1947         ssize_t ret;
1948         int saved_errno;
1949         char *conv;
1950
1951         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, path,
1952                                          &timestamp, &stripped)) {
1953                 return -1;
1954         }
1955         if (timestamp == 0) {
1956                 return SMB_VFS_NEXT_DISK_FREE(handle, path,
1957                                               bsize, dfree, dsize);
1958         }
1959
1960         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1961         TALLOC_FREE(stripped);
1962         if (conv == NULL) {
1963                 return -1;
1964         }
1965
1966         ret = SMB_VFS_NEXT_DISK_FREE(handle, conv, bsize, dfree, dsize);
1967
1968         saved_errno = errno;
1969         TALLOC_FREE(conv);
1970         errno = saved_errno;
1971
1972         return ret;
1973 }
1974
1975 static int shadow_copy2_get_quota(vfs_handle_struct *handle, const char *path,
1976                                   enum SMB_QUOTA_TYPE qtype, unid_t id,
1977                                   SMB_DISK_QUOTA *dq)
1978 {
1979         time_t timestamp;
1980         char *stripped;
1981         int ret;
1982         int saved_errno;
1983         char *conv;
1984
1985         if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, path, &timestamp,
1986                                          &stripped)) {
1987                 return -1;
1988         }
1989         if (timestamp == 0) {
1990                 return SMB_VFS_NEXT_GET_QUOTA(handle, path, qtype, id, dq);
1991         }
1992
1993         conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1994         TALLOC_FREE(stripped);
1995         if (conv == NULL) {
1996                 return -1;
1997         }
1998
1999         ret = SMB_VFS_NEXT_GET_QUOTA(handle, conv, qtype, id, dq);
2000
2001         saved_errno = errno;
2002         TALLOC_FREE(conv);
2003         errno = saved_errno;
2004
2005         return ret;
2006 }
2007
2008 static int shadow_copy2_connect(struct vfs_handle_struct *handle,
2009                                 const char *service, const char *user)
2010 {
2011         struct shadow_copy2_config *config;
2012         int ret;
2013         const char *snapdir;
2014         const char *gmt_format;
2015         const char *sort_order;
2016         const char *basedir = NULL;
2017         const char *snapsharepath = NULL;
2018         const char *mount_point;
2019
2020         DEBUG(10, (__location__ ": cnum[%u], connectpath[%s]\n",
2021                    (unsigned)handle->conn->cnum,
2022                    handle->conn->connectpath));
2023
2024         ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
2025         if (ret < 0) {
2026                 return ret;
2027         }
2028
2029         config = talloc_zero(handle->conn, struct shadow_copy2_config);
2030         if (config == NULL) {
2031                 DEBUG(0, ("talloc_zero() failed\n"));
2032                 errno = ENOMEM;
2033                 return -1;
2034         }
2035
2036         gmt_format = lp_parm_const_string(SNUM(handle->conn),
2037                                           "shadow", "format",
2038                                           GMT_FORMAT);
2039         config->gmt_format = talloc_strdup(config, gmt_format);
2040         if (config->gmt_format == NULL) {
2041                 DEBUG(0, ("talloc_strdup() failed\n"));
2042                 errno = ENOMEM;
2043                 return -1;
2044         }
2045
2046         config->use_sscanf = lp_parm_bool(SNUM(handle->conn),
2047                                           "shadow", "sscanf", false);
2048
2049         config->use_localtime = lp_parm_bool(SNUM(handle->conn),
2050                                              "shadow", "localtime",
2051                                              false);
2052
2053         snapdir = lp_parm_const_string(SNUM(handle->conn),
2054                                        "shadow", "snapdir",
2055                                        ".snapshots");
2056         config->snapdir = talloc_strdup(config, snapdir);
2057         if (config->snapdir == NULL) {
2058                 DEBUG(0, ("talloc_strdup() failed\n"));
2059                 errno = ENOMEM;
2060                 return -1;
2061         }
2062
2063         config->snapdirseverywhere = lp_parm_bool(SNUM(handle->conn),
2064                                                   "shadow",
2065                                                   "snapdirseverywhere",
2066                                                   false);
2067
2068         config->crossmountpoints = lp_parm_bool(SNUM(handle->conn),
2069                                                 "shadow", "crossmountpoints",
2070                                                 false);
2071
2072         if (config->crossmountpoints && !config->snapdirseverywhere) {
2073                 DBG_WARNING("Warning: 'crossmountpoints' depends on "
2074                             "'snapdirseverywhere'. Disabling crossmountpoints.\n");
2075         }
2076
2077         config->fixinodes = lp_parm_bool(SNUM(handle->conn),
2078                                          "shadow", "fixinodes",
2079                                          false);
2080
2081         sort_order = lp_parm_const_string(SNUM(handle->conn),
2082                                           "shadow", "sort", "desc");
2083         config->sort_order = talloc_strdup(config, sort_order);
2084         if (config->sort_order == NULL) {
2085                 DEBUG(0, ("talloc_strdup() failed\n"));
2086                 errno = ENOMEM;
2087                 return -1;
2088         }
2089
2090         mount_point = lp_parm_const_string(SNUM(handle->conn),
2091                                            "shadow", "mountpoint", NULL);
2092         if (mount_point != NULL) {
2093                 if (mount_point[0] != '/') {
2094                         DEBUG(1, (__location__ " Warning: 'mountpoint' is "
2095                                   "relative ('%s'), but it has to be an "
2096                                   "absolute path. Ignoring provided value.\n",
2097                                   mount_point));
2098                         mount_point = NULL;
2099                 } else {
2100                         char *p;
2101                         p = strstr(handle->conn->connectpath, mount_point);
2102                         if (p != handle->conn->connectpath) {
2103                                 DBG_WARNING("Warning: the share root (%s) is "
2104                                             "not a subdirectory of the "
2105                                             "specified mountpoint (%s). "
2106                                             "Ignoring provided value.\n",
2107                                             handle->conn->connectpath,
2108                                             mount_point);
2109                                 mount_point = NULL;
2110                         }
2111                 }
2112         }
2113
2114         if (mount_point != NULL) {
2115                 config->mount_point = talloc_strdup(config, mount_point);
2116                 if (config->mount_point == NULL) {
2117                         DEBUG(0, (__location__ " talloc_strdup() failed\n"));
2118                         return -1;
2119                 }
2120         } else {
2121                 config->mount_point = shadow_copy2_find_mount_point(config,
2122                                                                     handle);
2123                 if (config->mount_point == NULL) {
2124                         DBG_WARNING("shadow_copy2_find_mount_point "
2125                                     "of the share root '%s' failed: %s\n",
2126                                     handle->conn->connectpath, strerror(errno));
2127                         return -1;
2128                 }
2129         }
2130
2131         basedir = lp_parm_const_string(SNUM(handle->conn),
2132                                        "shadow", "basedir", NULL);
2133
2134         if (basedir != NULL) {
2135                 if (basedir[0] != '/') {
2136                         DEBUG(1, (__location__ " Warning: 'basedir' is "
2137                                   "relative ('%s'), but it has to be an "
2138                                   "absolute path. Disabling basedir.\n",
2139                                   basedir));
2140                         basedir = NULL;
2141                 } else {
2142                         char *p;
2143                         p = strstr(basedir, config->mount_point);
2144                         if (p != basedir) {
2145                                 DEBUG(1, ("Warning: basedir (%s) is not a "
2146                                           "subdirectory of the share root's "
2147                                           "mount point (%s). "
2148                                           "Disabling basedir\n",
2149                                           basedir, config->mount_point));
2150                                 basedir = NULL;
2151                         }
2152                 }
2153         }
2154
2155         if (config->snapdirseverywhere && basedir != NULL) {
2156                 DEBUG(1, (__location__ " Warning: 'basedir' is incompatible "
2157                           "with 'snapdirseverywhere'. Disabling basedir.\n"));
2158                 basedir = NULL;
2159         }
2160
2161         snapsharepath = lp_parm_const_string(SNUM(handle->conn), "shadow",
2162                                              "snapsharepath", NULL);
2163         if (snapsharepath != NULL) {
2164                 if (snapsharepath[0] == '/') {
2165                         DBG_WARNING("Warning: 'snapsharepath' is "
2166                                     "absolute ('%s'), but it has to be a "
2167                                     "relative path. Disabling snapsharepath.\n",
2168                                     snapsharepath);
2169                         snapsharepath = NULL;
2170                 }
2171                 if (config->snapdirseverywhere && snapsharepath != NULL) {
2172                         DBG_WARNING("Warning: 'snapsharepath' is incompatible "
2173                                     "with 'snapdirseverywhere'. Disabling "
2174                                     "snapsharepath.\n");
2175                         snapsharepath = NULL;
2176                 }
2177         }
2178
2179         if (basedir != NULL && snapsharepath != NULL) {
2180                 DBG_WARNING("Warning: 'snapsharepath' is incompatible with "
2181                             "'basedir'. Disabling snapsharepath\n");
2182                 snapsharepath = NULL;
2183         }
2184
2185         if (snapsharepath != NULL) {
2186                 config->rel_connectpath = talloc_strdup(config, snapsharepath);
2187                 if (config->rel_connectpath == NULL) {
2188                         DBG_ERR("talloc_strdup() failed\n");
2189                         errno = ENOMEM;
2190                         return -1;
2191                 }
2192         }
2193
2194         if (basedir == NULL) {
2195                 basedir = config->mount_point;
2196         }
2197
2198         if (config->rel_connectpath == NULL &&
2199             strlen(basedir) != strlen(handle->conn->connectpath)) {
2200                 config->rel_connectpath = talloc_strdup(config,
2201                         handle->conn->connectpath + strlen(basedir));
2202                 if (config->rel_connectpath == NULL) {
2203                         DEBUG(0, ("talloc_strdup() failed\n"));
2204                         errno = ENOMEM;
2205                         return -1;
2206                 }
2207         }
2208
2209         if (config->snapdir[0] == '/') {
2210                 config->snapdir_absolute = true;
2211
2212                 if (config->snapdirseverywhere == true) {
2213                         DEBUG(1, (__location__ " Warning: An absolute snapdir "
2214                                   "is incompatible with 'snapdirseverywhere', "
2215                                   "setting 'snapdirseverywhere' to false.\n"));
2216                         config->snapdirseverywhere = false;
2217                 }
2218
2219                 if (config->crossmountpoints == true) {
2220                         DEBUG(1, (__location__ " Warning: 'crossmountpoints' "
2221                                   "is not supported with an absolute snapdir. "
2222                                   "Disabling it.\n"));
2223                         config->crossmountpoints = false;
2224                 }
2225
2226                 config->snapshot_basepath = config->snapdir;
2227         } else {
2228                 config->snapshot_basepath = talloc_asprintf(config, "%s/%s",
2229                                 config->mount_point, config->snapdir);
2230                 if (config->snapshot_basepath == NULL) {
2231                         DEBUG(0, ("talloc_asprintf() failed\n"));
2232                         errno = ENOMEM;
2233                         return -1;
2234                 }
2235         }
2236
2237         DEBUG(10, ("shadow_copy2_connect: configuration:\n"
2238                    "  share root: '%s'\n"
2239                    "  mountpoint: '%s'\n"
2240                    "  rel share root: '%s'\n"
2241                    "  snapdir: '%s'\n"
2242                    "  snapshot base path: '%s'\n"
2243                    "  format: '%s'\n"
2244                    "  use sscanf: %s\n"
2245                    "  snapdirs everywhere: %s\n"
2246                    "  cross mountpoints: %s\n"
2247                    "  fix inodes: %s\n"
2248                    "  sort order: %s\n"
2249                    "",
2250                    handle->conn->connectpath,
2251                    config->mount_point,
2252                    config->rel_connectpath,
2253                    config->snapdir,
2254                    config->snapshot_basepath,
2255                    config->gmt_format,
2256                    config->use_sscanf ? "yes" : "no",
2257                    config->snapdirseverywhere ? "yes" : "no",
2258                    config->crossmountpoints ? "yes" : "no",
2259                    config->fixinodes ? "yes" : "no",
2260                    config->sort_order
2261                    ));
2262
2263
2264         SMB_VFS_HANDLE_SET_DATA(handle, config,
2265                                 NULL, struct shadow_copy2_config,
2266                                 return -1);
2267
2268         return 0;
2269 }
2270
2271 static struct vfs_fn_pointers vfs_shadow_copy2_fns = {
2272         .connect_fn = shadow_copy2_connect,
2273         .opendir_fn = shadow_copy2_opendir,
2274         .disk_free_fn = shadow_copy2_disk_free,
2275         .get_quota_fn = shadow_copy2_get_quota,
2276         .rename_fn = shadow_copy2_rename,
2277         .link_fn = shadow_copy2_link,
2278         .symlink_fn = shadow_copy2_symlink,
2279         .stat_fn = shadow_copy2_stat,
2280         .lstat_fn = shadow_copy2_lstat,
2281         .fstat_fn = shadow_copy2_fstat,
2282         .open_fn = shadow_copy2_open,
2283         .unlink_fn = shadow_copy2_unlink,
2284         .chmod_fn = shadow_copy2_chmod,
2285         .chown_fn = shadow_copy2_chown,
2286         .chdir_fn = shadow_copy2_chdir,
2287         .ntimes_fn = shadow_copy2_ntimes,
2288         .readlink_fn = shadow_copy2_readlink,
2289         .mknod_fn = shadow_copy2_mknod,
2290         .realpath_fn = shadow_copy2_realpath,
2291         .get_nt_acl_fn = shadow_copy2_get_nt_acl,
2292         .fget_nt_acl_fn = shadow_copy2_fget_nt_acl,
2293         .get_shadow_copy_data_fn = shadow_copy2_get_shadow_copy_data,
2294         .mkdir_fn = shadow_copy2_mkdir,
2295         .rmdir_fn = shadow_copy2_rmdir,
2296         .getxattr_fn = shadow_copy2_getxattr,
2297         .listxattr_fn = shadow_copy2_listxattr,
2298         .removexattr_fn = shadow_copy2_removexattr,
2299         .setxattr_fn = shadow_copy2_setxattr,
2300         .chmod_acl_fn = shadow_copy2_chmod_acl,
2301         .chflags_fn = shadow_copy2_chflags,
2302         .get_real_filename_fn = shadow_copy2_get_real_filename,
2303         .connectpath_fn = shadow_copy2_connectpath,
2304 };
2305
2306 NTSTATUS vfs_shadow_copy2_init(void);
2307 NTSTATUS vfs_shadow_copy2_init(void)
2308 {
2309         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
2310                                 "shadow_copy2", &vfs_shadow_copy2_fns);
2311 }