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   1 /*
   2  * ntfs-capture.c
   3  *
   4  * Capture a WIM image from a NTFS volume.  We capture everything we can,
   5  * including security data and alternate data streams.
   6  */
   7
   8 /*
   9  * Copyright (C) 2012, 2013 Eric Biggers
  10  *
  11  * This file is part of wimlib, a library for working with WIM files.
  12  *
  13  * wimlib is free software; you can redistribute it and/or modify it under the
  14  * terms of the GNU General Public License as published by the Free
  15  * Software Foundation; either version 3 of the License, or (at your option)
  16  * any later version.
  17  *
  18  * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
  19  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  20  * A PARTICULAR PURPOSE. See the GNU General Public License for more
  21  * details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with wimlib; if not, see http://www.gnu.org/licenses/.
  25  */
  26
  27
  28 #include "config.h"
  29
  30 #include <ntfs-3g/endians.h>
  31 #include <ntfs-3g/types.h>
  32
  33 #include "buffer_io.h"
  34 #include "dentry.h"
  35 #include "lookup_table.h"
  36 #include "security.h"
  37 #include "wimlib_internal.h"
  38
  39 #include <ntfs-3g/layout.h>
  40 #include <ntfs-3g/acls.h>
  41 #include <ntfs-3g/attrib.h>
  42 #include <ntfs-3g/misc.h>
  43 #include <ntfs-3g/reparse.h>
  44 #include <ntfs-3g/security.h> /* ntfs-3g/security.h before ntfs-3g/xattrs.h */
  45 #include <ntfs-3g/xattrs.h>
  46 #include <ntfs-3g/volume.h>
  47 #include <stdlib.h>
  48 #include <unistd.h>
  49 #include <errno.h>
  50
  51 #ifdef HAVE_ALLOCA_H
  52 #include <alloca.h>
  53 #endif
  54
  55 static inline ntfschar *
  56 attr_record_name(ATTR_RECORD *ar)
  57 {
  58         return (ntfschar*)((u8*)ar + le16_to_cpu(ar->name_offset));
  59 }
  60
  61 int
  62 read_ntfs_file_prefix(const struct wim_lookup_table_entry *lte,
  63                       u64 size,
  64                       consume_data_callback_t cb,
  65                       void *ctx_or_buf,
  66                       int _ignored_flags)
  67 {
  68         struct ntfs_location *loc = lte->ntfs_loc;
  69         ntfs_volume *vol = *loc->ntfs_vol_p;
  70         ntfs_inode *ni;
  71         ntfs_attr *na;
  72         s64 pos;
  73         s64 bytes_remaining;
  74         void *out_buf;
  75         int ret;
  76
  77         ni = ntfs_pathname_to_inode(vol, NULL, loc->path);
  78         if (!ni) {
  79                 ERROR_WITH_ERRNO("Can't find NTFS inode for \"%"TS"\"", loc->path);
  80                 ret = WIMLIB_ERR_NTFS_3G;
  81                 goto out;
  82         }
  83
  84         na = ntfs_attr_open(ni,
  85                             loc->is_reparse_point ? AT_REPARSE_POINT : AT_DATA,
  86                             loc->stream_name,
  87                             loc->stream_name_nchars);
  88         if (!na) {
  89                 ERROR_WITH_ERRNO("Failed to open attribute of \"%"TS"\" in "
  90                                  "NTFS volume", loc->path);
  91                 ret = WIMLIB_ERR_NTFS_3G;
  92                 goto out_close_ntfs_inode;
  93         }
  94
  95         /*if (is_reparse_point) {*/
  96                 /*if (ntfs_attr_pread(na, 0, 8, buf) != 8)*/
  97                         /*goto out_error;*/
  98                 /**reparse_tag_ret = le32_to_cpu(*(u32*)buf);*/
  99                 /*DEBUG("ReparseTag = %#x", *reparse_tag_ret);*/
 100                 /*pos = 8;*/
 101                 /*bytes_remaining -= 8;*/
 102         /*}*/
 103
 104         if (cb)
 105                 out_buf = alloca(WIM_CHUNK_SIZE);
 106         else
 107                 out_buf = ctx_or_buf;
 108         pos = 0;
 109         bytes_remaining = na->data_size;
 110         while (bytes_remaining) {
 111                 s64 to_read = min(bytes_remaining, WIM_CHUNK_SIZE);
 112                 if (ntfs_attr_pread(na, pos, to_read, out_buf) != to_read) {
 113                         ERROR_WITH_ERRNO("Error reading \"%"TS"\"", loc->path);
 114                         ret = WIMLIB_ERR_NTFS_3G;
 115                         goto out_close_ntfs_attr;
 116                 }
 117                 pos += to_read;
 118                 bytes_remaining -= to_read;
 119                 if (cb) {
 120                         ret = cb(out_buf, to_read, ctx_or_buf);
 121                         if (ret)
 122                                 goto out_close_ntfs_attr;
 123                 } else {
 124                         out_buf += to_read;
 125                 }
 126         }
 127         ret = 0;
 128 out_close_ntfs_attr:
 129         ntfs_attr_close(na);
 130 out_close_ntfs_inode:
 131         ntfs_inode_close(ni);
 132 out:
 133         return ret;
 134 }
 135
 136 /* Load the streams from a file or reparse point in the NTFS volume into the WIM
 137  * lookup table */
 138 static int
 139 capture_ntfs_streams(struct wim_inode *inode,
 140                      ntfs_inode *ni,
 141                      char *path,
 142                      size_t path_len,
 143                      struct wim_lookup_table *lookup_table,
 144                      ntfs_volume **ntfs_vol_p,
 145                      ATTR_TYPES type)
 146 {
 147         ntfs_attr_search_ctx *actx;
 148         struct ntfs_location *ntfs_loc = NULL;
 149         int ret = 0;
 150         struct wim_lookup_table_entry *lte;
 151
 152         DEBUG2("Capturing NTFS data streams from `%s'", path);
 153
 154         /* Get context to search the streams of the NTFS file. */
 155         actx = ntfs_attr_get_search_ctx(ni, NULL);
 156         if (!actx) {
 157                 ERROR_WITH_ERRNO("Cannot get NTFS attribute search "
 158                                  "context");
 159                 return WIMLIB_ERR_NTFS_3G;
 160         }
 161
 162         /* Capture each data stream or reparse data stream. */
 163         while (!ntfs_attr_lookup(type, NULL, 0,
 164                                  CASE_SENSITIVE, 0, NULL, 0, actx))
 165         {
 166                 u64 data_size = ntfs_get_attribute_value_length(actx->attr);
 167                 u64 name_length = actx->attr->name_length;
 168                 u32 stream_id;
 169
 170                 if (data_size == 0) {
 171                         if (errno != 0) {
 172                                 ERROR_WITH_ERRNO("Failed to get size of attribute of "
 173                                                  "`%s'", path);
 174                                 ret = WIMLIB_ERR_NTFS_3G;
 175                                 goto out_put_actx;
 176                         }
 177                         /* Empty stream.  No lookup table entry is needed. */
 178                         lte = NULL;
 179                 } else {
 180                         ntfs_loc = CALLOC(1, sizeof(*ntfs_loc));
 181                         if (!ntfs_loc)
 182                                 goto out_put_actx;
 183                         ntfs_loc->ntfs_vol_p = ntfs_vol_p;
 184                         ntfs_loc->path = MALLOC(path_len + 1);
 185                         if (!ntfs_loc->path)
 186                                 goto out_free_ntfs_loc;
 187                         memcpy(ntfs_loc->path, path, path_len + 1);
 188                         if (name_length) {
 189                                 ntfs_loc->stream_name = MALLOC(name_length * 2);
 190                                 if (!ntfs_loc->stream_name)
 191                                         goto out_free_ntfs_loc;
 192                                 memcpy(ntfs_loc->stream_name,
 193                                        attr_record_name(actx->attr),
 194                                        actx->attr->name_length * 2);
 195                                 ntfs_loc->stream_name_nchars = name_length;
 196                         }
 197
 198                         lte = new_lookup_table_entry();
 199                         if (!lte)
 200                                 goto out_free_ntfs_loc;
 201                         lte->ntfs_loc = ntfs_loc;
 202                         lte->resource_location = RESOURCE_IN_NTFS_VOLUME;
 203                 #if 0
 204                         if (type == AT_REPARSE_POINT) {
 205                                 ntfs_loc->is_reparse_point = true;
 206                                 lte->resource_entry.original_size = data_size - 8;
 207                                 lte->resource_entry.size = data_size - 8;
 208                         } else {
 209                                 ntfs_loc->is_reparse_point = false;
 210                                 lte->resource_entry.original_size = data_size;
 211                                 lte->resource_entry.size = data_size;
 212                         }
 213                 #else
 214                         ntfs_loc->is_reparse_point = (type == AT_REPARSE_POINT);
 215                         lte->resource_entry.original_size = data_size;
 216                 #endif
 217                         ntfs_loc = NULL;
 218                 }
 219                 if (name_length == 0) {
 220                         /* Unnamed data stream.  Put the reference to it in the
 221                          * dentry's inode. */
 222                         if (inode->i_lte) {
 223                                 ERROR("Found two un-named data streams for `%s'",
 224                                       path);
 225                                 ret = WIMLIB_ERR_NTFS_3G;
 226                                 goto out_free_lte;
 227                         }
 228                         stream_id = 0;
 229                         inode->i_lte = lte;
 230                 } else {
 231                         /* Named data stream.  Put the reference to it in the
 232                          * alternate data stream entries */
 233                         struct wim_ads_entry *new_ads_entry;
 234
 235                         new_ads_entry = inode_add_ads_utf16le(inode,
 236                                                               attr_record_name(actx->attr),
 237                                                               name_length * 2);
 238                         if (!new_ads_entry)
 239                                 goto out_free_lte;
 240                         wimlib_assert(new_ads_entry->stream_name_nbytes == name_length * 2);
 241                         stream_id = new_ads_entry->stream_id;
 242                         new_ads_entry->lte = lte;
 243                 }
 244                 if (lte) {
 245                         lookup_table_insert_unhashed(lookup_table, lte,
 246                                                      inode, stream_id);
 247                 }
 248         }
 249         ret = 0;
 250         goto out_put_actx;
 251 out_free_lte:
 252         free_lookup_table_entry(lte);
 253 out_free_ntfs_loc:
 254         if (ntfs_loc) {
 255                 FREE(ntfs_loc->path);
 256                 FREE(ntfs_loc->stream_name);
 257                 FREE(ntfs_loc);
 258         }
 259 out_put_actx:
 260         ntfs_attr_put_search_ctx(actx);
 261         if (ret == 0)
 262                 DEBUG2("Successfully captured NTFS streams from `%s'", path);
 263         else
 264                 ERROR("Failed to capture NTFS streams from `%s", path);
 265         return ret;
 266 }
 267
 268 /* Red-black tree that maps NTFS inode numbers to DOS names */
 269 struct dos_name_map {
 270         struct rb_root rb_root;
 271 };
 272
 273 struct dos_name_node {
 274         struct rb_node rb_node;
 275         char dos_name[24];
 276         int name_nbytes;
 277         u64 ntfs_ino;
 278 };
 279
 280 /* Inserts a new DOS name into the map */
 281 static int
 282 insert_dos_name(struct dos_name_map *map, const ntfschar *dos_name,
 283                 size_t name_nbytes, u64 ntfs_ino)
 284 {
 285         struct dos_name_node *new_node;
 286         struct rb_node **p;
 287         struct rb_root *root;
 288         struct rb_node *rb_parent;
 289
 290         DEBUG("DOS name_len = %zu", name_nbytes);
 291         new_node = MALLOC(sizeof(struct dos_name_node));
 292         if (!new_node)
 293                 return -1;
 294
 295         /* DOS names are supposed to be 12 characters max (that's 24 bytes,
 296          * assuming 2-byte ntfs characters) */
 297         wimlib_assert(name_nbytes <= sizeof(new_node->dos_name));
 298
 299         /* Initialize the DOS name, DOS name length, and NTFS inode number of
 300          * the red-black tree node */
 301         memcpy(new_node->dos_name, dos_name, name_nbytes);
 302         new_node->name_nbytes = name_nbytes;
 303         new_node->ntfs_ino = ntfs_ino;
 304
 305         /* Insert the red-black tree node */
 306         root = &map->rb_root;
 307         p = &root->rb_node;
 308         rb_parent = NULL;
 309         while (*p) {
 310                 struct dos_name_node *this;
 311
 312                 this = container_of(*p, struct dos_name_node, rb_node);
 313                 rb_parent = *p;
 314                 if (new_node->ntfs_ino < this->ntfs_ino)
 315                         p = &((*p)->rb_left);
 316                 else if (new_node->ntfs_ino > this->ntfs_ino)
 317                         p = &((*p)->rb_right);
 318                 else {
 319                         /* This should be impossible since a NTFS inode cannot
 320                          * have multiple DOS names, and we only should get each
 321                          * DOS name entry once from the ntfs_readdir() calls. */
 322                         ERROR("NTFS inode %"PRIu64" has multiple DOS names",
 323                               ntfs_ino);
 324                         return -1;
 325                 }
 326         }
 327         rb_link_node(&new_node->rb_node, rb_parent, p);
 328         rb_insert_color(&new_node->rb_node, root);
 329         DEBUG("Inserted DOS name for inode %"PRIu64, ntfs_ino);
 330         return 0;
 331 }
 332
 333 /* Returns a structure that contains the DOS name and its length for a NTFS
 334  * inode, or NULL if the inode has no DOS name. */
 335 static struct dos_name_node *
 336 lookup_dos_name(const struct dos_name_map *map, u64 ntfs_ino)
 337 {
 338         struct rb_node *node = map->rb_root.rb_node;
 339         while (node) {
 340                 struct dos_name_node *this;
 341                 this = container_of(node, struct dos_name_node, rb_node);
 342                 if (ntfs_ino < this->ntfs_ino)
 343                         node = node->rb_left;
 344                 else if (ntfs_ino > this->ntfs_ino)
 345                         node = node->rb_right;
 346                 else
 347                         return this;
 348         }
 349         return NULL;
 350 }
 351
 352 static int
 353 set_dentry_dos_name(struct wim_dentry *dentry, void *arg)
 354 {
 355         const struct dos_name_map *map = arg;
 356         const struct dos_name_node *node;
 357
 358         if (dentry->is_win32_name) {
 359                 node = lookup_dos_name(map, dentry->d_inode->i_ino);
 360                 if (node) {
 361                         dentry->short_name = MALLOC(node->name_nbytes + 2);
 362                         if (!dentry->short_name)
 363                                 return WIMLIB_ERR_NOMEM;
 364                         memcpy(dentry->short_name, node->dos_name,
 365                                node->name_nbytes);
 366                         dentry->short_name[node->name_nbytes / 2] = 0;
 367                         dentry->short_name_nbytes = node->name_nbytes;
 368                         DEBUG("Assigned DOS name to ino %"PRIu64,
 369                               dentry->d_inode->i_ino);
 370                 } else {
 371                         WARNING("NTFS inode %"PRIu64" has Win32 name with no "
 372                                 "corresponding DOS name",
 373                                 dentry->d_inode->i_ino);
 374                 }
 375         }
 376         return 0;
 377 }
 378
 379 static void
 380 free_dos_name_tree(struct rb_node *node) {
 381         if (node) {
 382                 free_dos_name_tree(node->rb_left);
 383                 free_dos_name_tree(node->rb_right);
 384                 FREE(container_of(node, struct dos_name_node, rb_node));
 385         }
 386 }
 387
 388 static void
 389 destroy_dos_name_map(struct dos_name_map *map)
 390 {
 391         free_dos_name_tree(map->rb_root.rb_node);
 392 }
 393
 394 struct readdir_ctx {
 395         struct wim_dentry *parent;
 396         ntfs_inode *dir_ni;
 397         char *path;
 398         size_t path_len;
 399         struct wim_lookup_table *lookup_table;
 400         struct wim_inode_table *inode_table;
 401         struct sd_set *sd_set;
 402         struct dos_name_map *dos_name_map;
 403         const struct wimlib_capture_config *config;
 404         ntfs_volume **ntfs_vol_p;
 405         int add_image_flags;
 406         wimlib_progress_func_t progress_func;
 407 };
 408
 409 static int
 410 build_dentry_tree_ntfs_recursive(struct wim_dentry **root_p,
 411                                  ntfs_inode *dir_ni,
 412                                  ntfs_inode *ni,
 413                                  char *path,
 414                                  size_t path_len,
 415                                  int name_type,
 416                                  struct wim_lookup_table *lookup_table,
 417                                  struct wim_inode_table *inode_table,
 418                                  struct sd_set *sd_set,
 419                                  const struct wimlib_capture_config *config,
 420                                  ntfs_volume **ntfs_vol_p,
 421                                  int add_image_flags,
 422                                  wimlib_progress_func_t progress_func);
 423
 424 static int
 425 wim_ntfs_capture_filldir(void *dirent, const ntfschar *name,
 426                          const int name_nchars, const int name_type,
 427                          const s64 pos, const MFT_REF mref,
 428                          const unsigned dt_type)
 429 {
 430         struct readdir_ctx *ctx;
 431         size_t mbs_name_nbytes;
 432         char *mbs_name;
 433         struct wim_dentry *child;
 434         int ret;
 435         size_t path_len;
 436         size_t name_nbytes = name_nchars * sizeof(ntfschar);
 437
 438         ctx = dirent;
 439         if (name_type & FILE_NAME_DOS) {
 440                 /* If this is the entry for a DOS name, store it for later. */
 441                 ret = insert_dos_name(ctx->dos_name_map, name,
 442                                       name_nbytes, mref & MFT_REF_MASK_CPU);
 443
 444                 /* Return now if an error occurred or if this is just a DOS name
 445                  * and not a Win32+DOS name. */
 446                 if (ret != 0 || name_type == FILE_NAME_DOS)
 447                         goto out;
 448         }
 449         ret = utf16le_to_tstr(name, name_nbytes,
 450                               &mbs_name, &mbs_name_nbytes);
 451         if (ret)
 452                 goto out;
 453
 454         if (mbs_name[0] == '.' &&
 455              (mbs_name[1] == '\0' ||
 456               (mbs_name[1] == '.' && mbs_name[2] == '\0'))) {
 457                 /* . or .. entries
 458                  *
 459                  * note: name_type is POSIX for these, so DOS names will not
 460                  * have been inserted for them.  */
 461                 ret = 0;
 462                 goto out_free_mbs_name;
 463         }
 464
 465         /* Open the inode for this directory entry and recursively capture the
 466          * directory tree rooted at it */
 467         ntfs_inode *ni = ntfs_inode_open(ctx->dir_ni->vol, mref);
 468         if (!ni) {
 469                 ERROR_WITH_ERRNO("Failed to open NTFS inode");
 470                 ret = -1;
 471                 goto out_free_mbs_name;
 472         }
 473         path_len = ctx->path_len;
 474         if (path_len != 1)
 475                 ctx->path[path_len++] = '/';
 476         memcpy(ctx->path + path_len, mbs_name, mbs_name_nbytes + 1);
 477         path_len += mbs_name_nbytes;
 478         child = NULL;
 479         ret = build_dentry_tree_ntfs_recursive(&child, ctx->dir_ni,
 480                                                ni, ctx->path, path_len, name_type,
 481                                                ctx->lookup_table,
 482                                                ctx->inode_table,
 483                                                ctx->sd_set,
 484                                                ctx->config, ctx->ntfs_vol_p,
 485                                                ctx->add_image_flags,
 486                                                ctx->progress_func);
 487         if (child)
 488                 dentry_add_child(ctx->parent, child);
 489         ntfs_inode_close(ni);
 490 out_free_mbs_name:
 491         FREE(mbs_name);
 492 out:
 493         return ret;
 494 }
 495
 496 /* Recursively build a WIM dentry tree corresponding to a NTFS volume.
 497  * At the same time, update the WIM lookup table with lookup table entries for
 498  * the NTFS streams, and build an array of security descriptors.
 499  */
 500 static int
 501 build_dentry_tree_ntfs_recursive(struct wim_dentry **root_ret,
 502                                  ntfs_inode *dir_ni,
 503                                  ntfs_inode *ni,
 504                                  char *path,
 505                                  size_t path_len,
 506                                  int name_type,
 507                                  struct wim_lookup_table *lookup_table,
 508                                  struct wim_inode_table *inode_table,
 509                                  struct sd_set *sd_set,
 510                                  const struct wimlib_capture_config *config,
 511                                  ntfs_volume **ntfs_vol_p,
 512                                  int add_image_flags,
 513                                  wimlib_progress_func_t progress_func)
 514 {
 515         u32 attributes;
 516         int ret;
 517         struct wim_dentry *root;
 518         struct wim_inode *inode;
 519
 520         if (exclude_path(path, path_len, config, false)) {
 521                 /* Exclude a file or directory tree based on the capture
 522                  * configuration file */
 523                 if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_EXCLUDE_VERBOSE)
 524                     && progress_func)
 525                 {
 526                         union wimlib_progress_info info;
 527                         info.scan.cur_path = path;
 528                         info.scan.excluded = true;
 529                         progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
 530                 }
 531                 root = NULL;
 532                 ret = 0;
 533                 goto out;
 534         }
 535
 536         /* Get file attributes */
 537         struct SECURITY_CONTEXT ctx;
 538         memset(&ctx, 0, sizeof(ctx));
 539         ctx.vol = ni->vol;
 540         ret = ntfs_xattr_system_getxattr(&ctx, XATTR_NTFS_ATTRIB,
 541                                          ni, dir_ni, (char *)&attributes,
 542                                          sizeof(u32));
 543         if (ret != 4) {
 544                 ERROR_WITH_ERRNO("Failed to get NTFS attributes from `%s'",
 545                                  path);
 546                 return WIMLIB_ERR_NTFS_3G;
 547         }
 548
 549         if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE)
 550             && progress_func)
 551         {
 552                 union wimlib_progress_info info;
 553                 info.scan.cur_path = path;
 554                 info.scan.excluded = false;
 555                 progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
 556         }
 557
 558         /* Create a WIM dentry with an associated inode, which may be shared */
 559         ret = inode_table_new_dentry(inode_table,
 560                                      path_basename_with_len(path, path_len),
 561                                      ni->mft_no,
 562                                      0,
 563                                      &root);
 564         if (ret)
 565                 return ret;
 566
 567         inode = root->d_inode;
 568
 569         if (inode->i_nlink > 1) /* Shared inode; nothing more to do */
 570                 goto out;
 571
 572         if (name_type & FILE_NAME_WIN32) /* Win32 or Win32+DOS name */
 573                 root->is_win32_name = 1;
 574         inode->i_creation_time    = le64_to_cpu(ni->creation_time);
 575         inode->i_last_write_time  = le64_to_cpu(ni->last_data_change_time);
 576         inode->i_last_access_time = le64_to_cpu(ni->last_access_time);
 577         inode->i_attributes       = le32_to_cpu(attributes);
 578         inode->i_resolved         = 1;
 579
 580         if (attributes & FILE_ATTR_REPARSE_POINT) {
 581                 /* Junction point, symbolic link, or other reparse point */
 582                 ret = capture_ntfs_streams(inode, ni, path,
 583                                            path_len, lookup_table,
 584                                            ntfs_vol_p, AT_REPARSE_POINT);
 585         } else if (ni->mrec->flags & MFT_RECORD_IS_DIRECTORY) {
 586
 587                 /* Normal directory */
 588                 s64 pos = 0;
 589                 struct dos_name_map dos_name_map = { .rb_root = {.rb_node = NULL} };
 590                 struct readdir_ctx ctx = {
 591                         .parent          = root,
 592                         .dir_ni          = ni,
 593                         .path            = path,
 594                         .path_len        = path_len,
 595                         .lookup_table    = lookup_table,
 596                         .inode_table     = inode_table,
 597                         .sd_set          = sd_set,
 598                         .dos_name_map    = &dos_name_map,
 599                         .config          = config,
 600                         .ntfs_vol_p      = ntfs_vol_p,
 601                         .add_image_flags = add_image_flags,
 602                         .progress_func   = progress_func,
 603                 };
 604                 ret = ntfs_readdir(ni, &pos, &ctx, wim_ntfs_capture_filldir);
 605                 if (ret) {
 606                         ERROR_WITH_ERRNO("ntfs_readdir()");
 607                         ret = WIMLIB_ERR_NTFS_3G;
 608                 } else {
 609                         ret = for_dentry_child(root, set_dentry_dos_name,
 610                                                &dos_name_map);
 611                 }
 612                 destroy_dos_name_map(&dos_name_map);
 613         } else {
 614                 /* Normal file */
 615                 ret = capture_ntfs_streams(inode, ni, path,
 616                                            path_len, lookup_table,
 617                                            ntfs_vol_p, AT_DATA);
 618         }
 619         if (ret)
 620                 goto out;
 621
 622         if (!(add_image_flags & WIMLIB_ADD_IMAGE_FLAG_NO_ACLS)) {
 623                 /* Get security descriptor */
 624                 char _sd[1];
 625                 char *sd = _sd;
 626                 errno = 0;
 627                 ret = ntfs_xattr_system_getxattr(&ctx, XATTR_NTFS_ACL,
 628                                                  ni, dir_ni, sd,
 629                                                  sizeof(sd));
 630                 if (ret > sizeof(sd)) {
 631                         sd = alloca(ret);
 632                         ret = ntfs_xattr_system_getxattr(&ctx, XATTR_NTFS_ACL,
 633                                                          ni, dir_ni, sd, ret);
 634                 }
 635                 if (ret > 0) {
 636                         inode->i_security_id = sd_set_add_sd(sd_set, sd, ret);
 637                         if (inode->i_security_id == -1) {
 638                                 ERROR("Out of memory");
 639                                 ret = WIMLIB_ERR_NOMEM;
 640                                 goto out;
 641                         }
 642                         DEBUG("Added security ID = %u for `%s'",
 643                               inode->i_security_id, path);
 644                         ret = 0;
 645                 } else if (ret < 0) {
 646                         ERROR_WITH_ERRNO("Failed to get security information from "
 647                                          "`%s'", path);
 648                         ret = WIMLIB_ERR_NTFS_3G;
 649                 } else {
 650                         inode->i_security_id = -1;
 651                         DEBUG("No security ID for `%s'", path);
 652                 }
 653         }
 654 out:
 655         if (ret == 0)
 656                 *root_ret = root;
 657         else
 658                 free_dentry_tree(root, lookup_table);
 659         return ret;
 660 }
 661
 662 int
 663 build_dentry_tree_ntfs(struct wim_dentry **root_p,
 664                        const char *device,
 665                        struct wim_lookup_table *lookup_table,
 666                        struct wim_inode_table *inode_table,
 667                        struct sd_set *sd_set,
 668                        const struct wimlib_capture_config *config,
 669                        int add_image_flags,
 670                        wimlib_progress_func_t progress_func,
 671                        void *extra_arg)
 672 {
 673         ntfs_volume *vol;
 674         ntfs_inode *root_ni;
 675         int ret;
 676         ntfs_volume **ntfs_vol_p = extra_arg;
 677
 678         DEBUG("Mounting NTFS volume `%s' read-only", device);
 679
 680 #ifdef HAVE_NTFS_MNT_RDONLY
 681         /* NTFS-3g 2013 */
 682         vol = ntfs_mount(device, NTFS_MNT_RDONLY);
 683 #else
 684         /* NTFS-3g 2011, 2012 */
 685         vol = ntfs_mount(device, MS_RDONLY);
 686 #endif
 687         if (!vol) {
 688                 ERROR_WITH_ERRNO("Failed to mount NTFS volume `%s' read-only",
 689                                  device);
 690                 return WIMLIB_ERR_NTFS_3G;
 691         }
 692         ntfs_open_secure(vol);
 693
 694         /* We don't want to capture the special NTFS files such as $Bitmap.  Not
 695          * to be confused with "hidden" or "system" files which are real files
 696          * that we do need to capture.  */
 697         NVolClearShowSysFiles(vol);
 698
 699         DEBUG("Opening root NTFS dentry");
 700         root_ni = ntfs_inode_open(vol, FILE_root);
 701         if (!root_ni) {
 702                 ERROR_WITH_ERRNO("Failed to open root inode of NTFS volume "
 703                                  "`%s'", device);
 704                 ret = WIMLIB_ERR_NTFS_3G;
 705                 goto out;
 706         }
 707
 708         /* Currently we assume that all the paths fit into this length and there
 709          * is no check for overflow. */
 710         char *path = MALLOC(32768);
 711         if (!path) {
 712                 ERROR("Could not allocate memory for NTFS pathname");
 713                 ret = WIMLIB_ERR_NOMEM;
 714                 goto out_cleanup;
 715         }
 716
 717         path[0] = '/';
 718         path[1] = '\0';
 719         ret = build_dentry_tree_ntfs_recursive(root_p, NULL, root_ni, path, 1,
 720                                                FILE_NAME_POSIX, lookup_table,
 721                                                inode_table,
 722                                                sd_set,
 723                                                config, ntfs_vol_p,
 724                                                add_image_flags,
 725                                                progress_func);
 726 out_cleanup:
 727         FREE(path);
 728         ntfs_inode_close(root_ni);
 729 out:
 730         ntfs_index_ctx_put(vol->secure_xsii);
 731         ntfs_index_ctx_put(vol->secure_xsdh);
 732         ntfs_inode_close(vol->secure_ni);
 733
 734         if (ret) {
 735                 if (ntfs_umount(vol, FALSE) != 0) {
 736                         ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'",
 737                                          device);
 738                         if (ret == 0)
 739                                 ret = WIMLIB_ERR_NTFS_3G;
 740                 }
 741         } else {
 742                 /* We need to leave the NTFS volume mounted so that we can read
 743                  * the NTFS files again when we are actually writing the WIM */
 744                 *ntfs_vol_p = vol;
 745         }
 746         return ret;
 747 }