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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                 struct wim_lookup_table_entry **my_ptr;
 169                 if (data_size == 0) {
 170                         if (errno != 0) {
 171                                 ERROR_WITH_ERRNO("Failed to get size of attribute of "
 172                                                  "`%s'", path);
 173                                 ret = WIMLIB_ERR_NTFS_3G;
 174                                 goto out_put_actx;
 175                         }
 176                         /* Empty stream.  No lookup table entry is needed. */
 177                         lte = NULL;
 178                 } else {
 179                         ntfs_loc = CALLOC(1, sizeof(*ntfs_loc));
 180                         if (!ntfs_loc)
 181                                 goto out_put_actx;
 182                         ntfs_loc->ntfs_vol_p = ntfs_vol_p;
 183                         ntfs_loc->path = MALLOC(path_len + 1);
 184                         if (!ntfs_loc->path)
 185                                 goto out_free_ntfs_loc;
 186                         memcpy(ntfs_loc->path, path, path_len + 1);
 187                         if (name_length) {
 188                                 ntfs_loc->stream_name = MALLOC(name_length * 2);
 189                                 if (!ntfs_loc->stream_name)
 190                                         goto out_free_ntfs_loc;
 191                                 memcpy(ntfs_loc->stream_name,
 192                                        attr_record_name(actx->attr),
 193                                        actx->attr->name_length * 2);
 194                                 ntfs_loc->stream_name_nchars = name_length;
 195                         }
 196
 197                         lte = new_lookup_table_entry();
 198                         if (!lte)
 199                                 goto out_free_ntfs_loc;
 200                         lte->ntfs_loc = ntfs_loc;
 201                         lte->resource_location = RESOURCE_IN_NTFS_VOLUME;
 202                 #if 0
 203                         if (type == AT_REPARSE_POINT) {
 204                                 ntfs_loc->is_reparse_point = true;
 205                                 lte->resource_entry.original_size = data_size - 8;
 206                                 lte->resource_entry.size = data_size - 8;
 207                         } else {
 208                                 ntfs_loc->is_reparse_point = false;
 209                                 lte->resource_entry.original_size = data_size;
 210                                 lte->resource_entry.size = data_size;
 211                         }
 212                 #else
 213                         ntfs_loc->is_reparse_point = (type == AT_REPARSE_POINT);
 214                         lte->resource_entry.original_size = data_size;
 215                 #endif
 216                         ntfs_loc = NULL;
 217                 }
 218                 if (name_length == 0) {
 219                         /* Unnamed data stream.  Put the reference to it in the
 220                          * dentry's inode. */
 221                         if (inode->i_lte) {
 222                                 ERROR("Found two un-named data streams for `%s'",
 223                                       path);
 224                                 ret = WIMLIB_ERR_NTFS_3G;
 225                                 goto out_free_lte;
 226                         }
 227                         my_ptr = &inode->i_lte;
 228                 } else {
 229                         /* Named data stream.  Put the reference to it in the
 230                          * alternate data stream entries */
 231                         struct wim_ads_entry *new_ads_entry;
 232
 233                         new_ads_entry = inode_add_ads_utf16le(inode,
 234                                                               attr_record_name(actx->attr),
 235                                                               name_length * 2);
 236                         if (!new_ads_entry)
 237                                 goto out_free_lte;
 238                         wimlib_assert(new_ads_entry->stream_name_nbytes == name_length * 2);
 239                         my_ptr = &new_ads_entry->lte;
 240                 }
 241                 lookup_table_insert_unhashed(lookup_table, lte, my_ptr);
 242         }
 243         ret = 0;
 244         goto out_put_actx;
 245 out_free_lte:
 246         free_lookup_table_entry(lte);
 247 out_free_ntfs_loc:
 248         if (ntfs_loc) {
 249                 FREE(ntfs_loc->path);
 250                 FREE(ntfs_loc->stream_name);
 251                 FREE(ntfs_loc);
 252         }
 253 out_put_actx:
 254         ntfs_attr_put_search_ctx(actx);
 255         if (ret == 0)
 256                 DEBUG2("Successfully captured NTFS streams from `%s'", path);
 257         else
 258                 ERROR("Failed to capture NTFS streams from `%s", path);
 259         return ret;
 260 }
 261
 262 /* Red-black tree that maps NTFS inode numbers to DOS names */
 263 struct dos_name_map {
 264         struct rb_root rb_root;
 265 };
 266
 267 struct dos_name_node {
 268         struct rb_node rb_node;
 269         char dos_name[24];
 270         int name_nbytes;
 271         u64 ntfs_ino;
 272 };
 273
 274 /* Inserts a new DOS name into the map */
 275 static int
 276 insert_dos_name(struct dos_name_map *map, const ntfschar *dos_name,
 277                 size_t name_nbytes, u64 ntfs_ino)
 278 {
 279         struct dos_name_node *new_node;
 280         struct rb_node **p;
 281         struct rb_root *root;
 282         struct rb_node *rb_parent;
 283
 284         DEBUG("DOS name_len = %zu", name_nbytes);
 285         new_node = MALLOC(sizeof(struct dos_name_node));
 286         if (!new_node)
 287                 return -1;
 288
 289         /* DOS names are supposed to be 12 characters max (that's 24 bytes,
 290          * assuming 2-byte ntfs characters) */
 291         wimlib_assert(name_nbytes <= sizeof(new_node->dos_name));
 292
 293         /* Initialize the DOS name, DOS name length, and NTFS inode number of
 294          * the red-black tree node */
 295         memcpy(new_node->dos_name, dos_name, name_nbytes);
 296         new_node->name_nbytes = name_nbytes;
 297         new_node->ntfs_ino = ntfs_ino;
 298
 299         /* Insert the red-black tree node */
 300         root = &map->rb_root;
 301         p = &root->rb_node;
 302         rb_parent = NULL;
 303         while (*p) {
 304                 struct dos_name_node *this;
 305
 306                 this = container_of(*p, struct dos_name_node, rb_node);
 307                 rb_parent = *p;
 308                 if (new_node->ntfs_ino < this->ntfs_ino)
 309                         p = &((*p)->rb_left);
 310                 else if (new_node->ntfs_ino > this->ntfs_ino)
 311                         p = &((*p)->rb_right);
 312                 else {
 313                         /* This should be impossible since a NTFS inode cannot
 314                          * have multiple DOS names, and we only should get each
 315                          * DOS name entry once from the ntfs_readdir() calls. */
 316                         ERROR("NTFS inode %"PRIu64" has multiple DOS names",
 317                               ntfs_ino);
 318                         return -1;
 319                 }
 320         }
 321         rb_link_node(&new_node->rb_node, rb_parent, p);
 322         rb_insert_color(&new_node->rb_node, root);
 323         DEBUG("Inserted DOS name for inode %"PRIu64, ntfs_ino);
 324         return 0;
 325 }
 326
 327 /* Returns a structure that contains the DOS name and its length for a NTFS
 328  * inode, or NULL if the inode has no DOS name. */
 329 static struct dos_name_node *
 330 lookup_dos_name(const struct dos_name_map *map, u64 ntfs_ino)
 331 {
 332         struct rb_node *node = map->rb_root.rb_node;
 333         while (node) {
 334                 struct dos_name_node *this;
 335                 this = container_of(node, struct dos_name_node, rb_node);
 336                 if (ntfs_ino < this->ntfs_ino)
 337                         node = node->rb_left;
 338                 else if (ntfs_ino > this->ntfs_ino)
 339                         node = node->rb_right;
 340                 else
 341                         return this;
 342         }
 343         return NULL;
 344 }
 345
 346 static int
 347 set_dentry_dos_name(struct wim_dentry *dentry, void *arg)
 348 {
 349         const struct dos_name_map *map = arg;
 350         const struct dos_name_node *node;
 351
 352         if (dentry->is_win32_name) {
 353                 node = lookup_dos_name(map, dentry->d_inode->i_ino);
 354                 if (node) {
 355                         dentry->short_name = MALLOC(node->name_nbytes + 2);
 356                         if (!dentry->short_name)
 357                                 return WIMLIB_ERR_NOMEM;
 358                         memcpy(dentry->short_name, node->dos_name,
 359                                node->name_nbytes);
 360                         dentry->short_name[node->name_nbytes / 2] = 0;
 361                         dentry->short_name_nbytes = node->name_nbytes;
 362                         DEBUG("Assigned DOS name to ino %"PRIu64,
 363                               dentry->d_inode->i_ino);
 364                 } else {
 365                         WARNING("NTFS inode %"PRIu64" has Win32 name with no "
 366                                 "corresponding DOS name",
 367                                 dentry->d_inode->i_ino);
 368                 }
 369         }
 370         return 0;
 371 }
 372
 373 static void
 374 free_dos_name_tree(struct rb_node *node) {
 375         if (node) {
 376                 free_dos_name_tree(node->rb_left);
 377                 free_dos_name_tree(node->rb_right);
 378                 FREE(container_of(node, struct dos_name_node, rb_node));
 379         }
 380 }
 381
 382 static void
 383 destroy_dos_name_map(struct dos_name_map *map)
 384 {
 385         free_dos_name_tree(map->rb_root.rb_node);
 386 }
 387
 388 struct readdir_ctx {
 389         struct wim_dentry *parent;
 390         ntfs_inode *dir_ni;
 391         char *path;
 392         size_t path_len;
 393         struct wim_lookup_table *lookup_table;
 394         struct wim_inode_table *inode_table;
 395         struct sd_set *sd_set;
 396         struct dos_name_map *dos_name_map;
 397         const struct wimlib_capture_config *config;
 398         ntfs_volume **ntfs_vol_p;
 399         int add_image_flags;
 400         wimlib_progress_func_t progress_func;
 401 };
 402
 403 static int
 404 build_dentry_tree_ntfs_recursive(struct wim_dentry **root_p,
 405                                  ntfs_inode *dir_ni,
 406                                  ntfs_inode *ni,
 407                                  char *path,
 408                                  size_t path_len,
 409                                  int name_type,
 410                                  struct wim_lookup_table *lookup_table,
 411                                  struct wim_inode_table *inode_table,
 412                                  struct sd_set *sd_set,
 413                                  const struct wimlib_capture_config *config,
 414                                  ntfs_volume **ntfs_vol_p,
 415                                  int add_image_flags,
 416                                  wimlib_progress_func_t progress_func);
 417
 418 static int
 419 wim_ntfs_capture_filldir(void *dirent, const ntfschar *name,
 420                          const int name_nchars, const int name_type,
 421                          const s64 pos, const MFT_REF mref,
 422                          const unsigned dt_type)
 423 {
 424         struct readdir_ctx *ctx;
 425         size_t mbs_name_nbytes;
 426         char *mbs_name;
 427         struct wim_dentry *child;
 428         int ret;
 429         size_t path_len;
 430         size_t name_nbytes = name_nchars * sizeof(ntfschar);
 431
 432         ctx = dirent;
 433         if (name_type & FILE_NAME_DOS) {
 434                 /* If this is the entry for a DOS name, store it for later. */
 435                 ret = insert_dos_name(ctx->dos_name_map, name,
 436                                       name_nbytes, mref & MFT_REF_MASK_CPU);
 437
 438                 /* Return now if an error occurred or if this is just a DOS name
 439                  * and not a Win32+DOS name. */
 440                 if (ret != 0 || name_type == FILE_NAME_DOS)
 441                         goto out;
 442         }
 443         ret = utf16le_to_tstr(name, name_nbytes,
 444                               &mbs_name, &mbs_name_nbytes);
 445         if (ret)
 446                 goto out;
 447
 448         if (mbs_name[0] == '.' &&
 449              (mbs_name[1] == '\0' ||
 450               (mbs_name[1] == '.' && mbs_name[2] == '\0'))) {
 451                 /* . or .. entries
 452                  *
 453                  * note: name_type is POSIX for these, so DOS names will not
 454                  * have been inserted for them.  */
 455                 ret = 0;
 456                 goto out_free_mbs_name;
 457         }
 458
 459         /* Open the inode for this directory entry and recursively capture the
 460          * directory tree rooted at it */
 461         ntfs_inode *ni = ntfs_inode_open(ctx->dir_ni->vol, mref);
 462         if (!ni) {
 463                 ERROR_WITH_ERRNO("Failed to open NTFS inode");
 464                 ret = -1;
 465                 goto out_free_mbs_name;
 466         }
 467         path_len = ctx->path_len;
 468         if (path_len != 1)
 469                 ctx->path[path_len++] = '/';
 470         memcpy(ctx->path + path_len, mbs_name, mbs_name_nbytes + 1);
 471         path_len += mbs_name_nbytes;
 472         child = NULL;
 473         ret = build_dentry_tree_ntfs_recursive(&child, ctx->dir_ni,
 474                                                ni, ctx->path, path_len, name_type,
 475                                                ctx->lookup_table,
 476                                                ctx->inode_table,
 477                                                ctx->sd_set,
 478                                                ctx->config, ctx->ntfs_vol_p,
 479                                                ctx->add_image_flags,
 480                                                ctx->progress_func);
 481         if (child)
 482                 dentry_add_child(ctx->parent, child);
 483         ntfs_inode_close(ni);
 484 out_free_mbs_name:
 485         FREE(mbs_name);
 486 out:
 487         return ret;
 488 }
 489
 490 /* Recursively build a WIM dentry tree corresponding to a NTFS volume.
 491  * At the same time, update the WIM lookup table with lookup table entries for
 492  * the NTFS streams, and build an array of security descriptors.
 493  */
 494 static int
 495 build_dentry_tree_ntfs_recursive(struct wim_dentry **root_ret,
 496                                  ntfs_inode *dir_ni,
 497                                  ntfs_inode *ni,
 498                                  char *path,
 499                                  size_t path_len,
 500                                  int name_type,
 501                                  struct wim_lookup_table *lookup_table,
 502                                  struct wim_inode_table *inode_table,
 503                                  struct sd_set *sd_set,
 504                                  const struct wimlib_capture_config *config,
 505                                  ntfs_volume **ntfs_vol_p,
 506                                  int add_image_flags,
 507                                  wimlib_progress_func_t progress_func)
 508 {
 509         u32 attributes;
 510         int ret;
 511         struct wim_dentry *root;
 512         struct wim_inode *inode;
 513
 514         if (exclude_path(path, path_len, config, false)) {
 515                 /* Exclude a file or directory tree based on the capture
 516                  * configuration file */
 517                 if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_EXCLUDE_VERBOSE)
 518                     && progress_func)
 519                 {
 520                         union wimlib_progress_info info;
 521                         info.scan.cur_path = path;
 522                         info.scan.excluded = true;
 523                         progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
 524                 }
 525                 root = NULL;
 526                 ret = 0;
 527                 goto out;
 528         }
 529
 530         /* Get file attributes */
 531         struct SECURITY_CONTEXT ctx;
 532         memset(&ctx, 0, sizeof(ctx));
 533         ctx.vol = ni->vol;
 534         ret = ntfs_xattr_system_getxattr(&ctx, XATTR_NTFS_ATTRIB,
 535                                          ni, dir_ni, (char *)&attributes,
 536                                          sizeof(u32));
 537         if (ret != 4) {
 538                 ERROR_WITH_ERRNO("Failed to get NTFS attributes from `%s'",
 539                                  path);
 540                 return WIMLIB_ERR_NTFS_3G;
 541         }
 542
 543         if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE)
 544             && progress_func)
 545         {
 546                 union wimlib_progress_info info;
 547                 info.scan.cur_path = path;
 548                 info.scan.excluded = false;
 549                 progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
 550         }
 551
 552         /* Create a WIM dentry with an associated inode, which may be shared */
 553         ret = inode_table_new_dentry(inode_table,
 554                                      path_basename_with_len(path, path_len),
 555                                      ni->mft_no,
 556                                      0,
 557                                      &root);
 558         if (ret)
 559                 return ret;
 560
 561         inode = root->d_inode;
 562
 563         if (inode->i_nlink > 1) /* Shared inode; nothing more to do */
 564                 goto out;
 565
 566         if (name_type & FILE_NAME_WIN32) /* Win32 or Win32+DOS name */
 567                 root->is_win32_name = 1;
 568         inode->i_creation_time    = le64_to_cpu(ni->creation_time);
 569         inode->i_last_write_time  = le64_to_cpu(ni->last_data_change_time);
 570         inode->i_last_access_time = le64_to_cpu(ni->last_access_time);
 571         inode->i_attributes       = le32_to_cpu(attributes);
 572         inode->i_resolved         = 1;
 573
 574         if (attributes & FILE_ATTR_REPARSE_POINT) {
 575                 /* Junction point, symbolic link, or other reparse point */
 576                 ret = capture_ntfs_streams(inode, ni, path,
 577                                            path_len, lookup_table,
 578                                            ntfs_vol_p, AT_REPARSE_POINT);
 579         } else if (ni->mrec->flags & MFT_RECORD_IS_DIRECTORY) {
 580
 581                 /* Normal directory */
 582                 s64 pos = 0;
 583                 struct dos_name_map dos_name_map = { .rb_root = {.rb_node = NULL} };
 584                 struct readdir_ctx ctx = {
 585                         .parent          = root,
 586                         .dir_ni          = ni,
 587                         .path            = path,
 588                         .path_len        = path_len,
 589                         .lookup_table    = lookup_table,
 590                         .inode_table     = inode_table,
 591                         .sd_set          = sd_set,
 592                         .dos_name_map    = &dos_name_map,
 593                         .config          = config,
 594                         .ntfs_vol_p      = ntfs_vol_p,
 595                         .add_image_flags = add_image_flags,
 596                         .progress_func   = progress_func,
 597                 };
 598                 ret = ntfs_readdir(ni, &pos, &ctx, wim_ntfs_capture_filldir);
 599                 if (ret) {
 600                         ERROR_WITH_ERRNO("ntfs_readdir()");
 601                         ret = WIMLIB_ERR_NTFS_3G;
 602                 } else {
 603                         ret = for_dentry_child(root, set_dentry_dos_name,
 604                                                &dos_name_map);
 605                 }
 606                 destroy_dos_name_map(&dos_name_map);
 607         } else {
 608                 /* Normal file */
 609                 ret = capture_ntfs_streams(inode, ni, path,
 610                                            path_len, lookup_table,
 611                                            ntfs_vol_p, AT_DATA);
 612         }
 613         if (ret)
 614                 goto out;
 615
 616         if (!(add_image_flags & WIMLIB_ADD_IMAGE_FLAG_NO_ACLS)) {
 617                 /* Get security descriptor */
 618                 char _sd[1];
 619                 char *sd = _sd;
 620                 errno = 0;
 621                 ret = ntfs_xattr_system_getxattr(&ctx, XATTR_NTFS_ACL,
 622                                                  ni, dir_ni, sd,
 623                                                  sizeof(sd));
 624                 if (ret > sizeof(sd)) {
 625                         sd = alloca(ret);
 626                         ret = ntfs_xattr_system_getxattr(&ctx, XATTR_NTFS_ACL,
 627                                                          ni, dir_ni, sd, ret);
 628                 }
 629                 if (ret > 0) {
 630                         inode->i_security_id = sd_set_add_sd(sd_set, sd, ret);
 631                         if (inode->i_security_id == -1) {
 632                                 ERROR("Out of memory");
 633                                 ret = WIMLIB_ERR_NOMEM;
 634                                 goto out;
 635                         }
 636                         DEBUG("Added security ID = %u for `%s'",
 637                               inode->i_security_id, path);
 638                         ret = 0;
 639                 } else if (ret < 0) {
 640                         ERROR_WITH_ERRNO("Failed to get security information from "
 641                                          "`%s'", path);
 642                         ret = WIMLIB_ERR_NTFS_3G;
 643                 } else {
 644                         inode->i_security_id = -1;
 645                         DEBUG("No security ID for `%s'", path);
 646                 }
 647         }
 648 out:
 649         if (ret == 0)
 650                 *root_ret = root;
 651         else
 652                 free_dentry_tree(root, lookup_table);
 653         return ret;
 654 }
 655
 656 int
 657 build_dentry_tree_ntfs(struct wim_dentry **root_p,
 658                        const char *device,
 659                        struct wim_lookup_table *lookup_table,
 660                        struct wim_inode_table *inode_table,
 661                        struct sd_set *sd_set,
 662                        const struct wimlib_capture_config *config,
 663                        int add_image_flags,
 664                        wimlib_progress_func_t progress_func,
 665                        void *extra_arg)
 666 {
 667         ntfs_volume *vol;
 668         ntfs_inode *root_ni;
 669         int ret;
 670         ntfs_volume **ntfs_vol_p = extra_arg;
 671
 672         DEBUG("Mounting NTFS volume `%s' read-only", device);
 673
 674 #ifdef HAVE_NTFS_MNT_RDONLY
 675         /* NTFS-3g 2013 */
 676         vol = ntfs_mount(device, NTFS_MNT_RDONLY);
 677 #else
 678         /* NTFS-3g 2011, 2012 */
 679         vol = ntfs_mount(device, MS_RDONLY);
 680 #endif
 681         if (!vol) {
 682                 ERROR_WITH_ERRNO("Failed to mount NTFS volume `%s' read-only",
 683                                  device);
 684                 return WIMLIB_ERR_NTFS_3G;
 685         }
 686         ntfs_open_secure(vol);
 687
 688         /* We don't want to capture the special NTFS files such as $Bitmap.  Not
 689          * to be confused with "hidden" or "system" files which are real files
 690          * that we do need to capture.  */
 691         NVolClearShowSysFiles(vol);
 692
 693         DEBUG("Opening root NTFS dentry");
 694         root_ni = ntfs_inode_open(vol, FILE_root);
 695         if (!root_ni) {
 696                 ERROR_WITH_ERRNO("Failed to open root inode of NTFS volume "
 697                                  "`%s'", device);
 698                 ret = WIMLIB_ERR_NTFS_3G;
 699                 goto out;
 700         }
 701
 702         /* Currently we assume that all the paths fit into this length and there
 703          * is no check for overflow. */
 704         char *path = MALLOC(32768);
 705         if (!path) {
 706                 ERROR("Could not allocate memory for NTFS pathname");
 707                 ret = WIMLIB_ERR_NOMEM;
 708                 goto out_cleanup;
 709         }
 710
 711         path[0] = '/';
 712         path[1] = '\0';
 713         ret = build_dentry_tree_ntfs_recursive(root_p, NULL, root_ni, path, 1,
 714                                                FILE_NAME_POSIX, lookup_table,
 715                                                inode_table,
 716                                                sd_set,
 717                                                config, ntfs_vol_p,
 718                                                add_image_flags,
 719                                                progress_func);
 720 out_cleanup:
 721         FREE(path);
 722         ntfs_inode_close(root_ni);
 723 out:
 724         ntfs_index_ctx_put(vol->secure_xsii);
 725         ntfs_index_ctx_put(vol->secure_xsdh);
 726         ntfs_inode_close(vol->secure_ni);
 727
 728         if (ret) {
 729                 if (ntfs_umount(vol, FALSE) != 0) {
 730                         ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'",
 731                                          device);
 732                         if (ret == 0)
 733                                 ret = WIMLIB_ERR_NTFS_3G;
 734                 }
 735         } else {
 736                 /* We need to leave the NTFS volume mounted so that we can read
 737                  * the NTFS files again when we are actually writing the WIM */
 738                 *ntfs_vol_p = vol;
 739         }
 740         return ret;
 741 }