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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 static ntfs_attr *
  62 open_ntfs_attr(ntfs_inode *ni, struct ntfs_location *loc)
  63 {
  64         ntfs_attr *na;
  65
  66         na = ntfs_attr_open(ni,
  67                             loc->is_reparse_point ? AT_REPARSE_POINT : AT_DATA,
  68                             loc->stream_name,
  69                             loc->stream_name_nchars);
  70         if (!na) {
  71                 ERROR_WITH_ERRNO("Failed to open attribute of \"%"TS"\" in "
  72                                  "NTFS volume", loc->path);
  73         }
  74         return na;
  75 }
  76
  77 int
  78 read_ntfs_file_prefix(const struct wim_lookup_table_entry *lte,
  79                       u64 size,
  80                       consume_data_callback_t cb,
  81                       void *ctx_or_buf,
  82                       int _ignored_flags)
  83 {
  84         struct ntfs_location *loc = lte->ntfs_loc;
  85         ntfs_volume *vol = loc->ntfs_vol;
  86         ntfs_inode *ni;
  87         ntfs_attr *na;
  88         s64 pos;
  89         s64 bytes_remaining;
  90         void *out_buf;
  91         int ret;
  92
  93         ni = ntfs_pathname_to_inode(vol, NULL, loc->path);
  94         if (!ni) {
  95                 ERROR_WITH_ERRNO("Can't find NTFS inode for \"%"TS"\"", loc->path);
  96                 ret = WIMLIB_ERR_NTFS_3G;
  97                 goto out;
  98         }
  99
 100         na = open_ntfs_attr(ni, loc);
 101         if (!na) {
 102                 ret = WIMLIB_ERR_NTFS_3G;
 103                 goto out_close_ntfs_inode;
 104         }
 105
 106         if (cb)
 107                 out_buf = alloca(WIM_CHUNK_SIZE);
 108         else
 109                 out_buf = ctx_or_buf;
 110         pos = (loc->is_reparse_point) ? 8 : 0;
 111         bytes_remaining = size;
 112         while (bytes_remaining) {
 113                 s64 to_read = min(bytes_remaining, WIM_CHUNK_SIZE);
 114                 if (ntfs_attr_pread(na, pos, to_read, out_buf) != to_read) {
 115                         ERROR_WITH_ERRNO("Error reading \"%"TS"\"", loc->path);
 116                         ret = WIMLIB_ERR_NTFS_3G;
 117                         goto out_close_ntfs_attr;
 118                 }
 119                 pos += to_read;
 120                 bytes_remaining -= to_read;
 121                 if (cb) {
 122                         ret = cb(out_buf, to_read, ctx_or_buf);
 123                         if (ret)
 124                                 goto out_close_ntfs_attr;
 125                 } else {
 126                         out_buf += to_read;
 127                 }
 128         }
 129         ret = 0;
 130 out_close_ntfs_attr:
 131         ntfs_attr_close(na);
 132 out_close_ntfs_inode:
 133         ntfs_inode_close(ni);
 134 out:
 135         return ret;
 136 }
 137
 138 static int
 139 read_reparse_tag(ntfs_inode *ni, struct ntfs_location *loc,
 140                  u32 *reparse_tag_ret)
 141 {
 142         int ret;
 143         u8 buf[8];
 144         ntfs_attr *na;
 145
 146         na = open_ntfs_attr(ni, loc);
 147         if (!na) {
 148                 ret = WIMLIB_ERR_NTFS_3G;
 149                 goto out;
 150         }
 151
 152         if (ntfs_attr_pread(na, 0, 8, buf) != 8) {
 153                 ERROR_WITH_ERRNO("Error reading reparse data");
 154                 ret = WIMLIB_ERR_NTFS_3G;
 155                 goto out_close_ntfs_attr;
 156         }
 157         *reparse_tag_ret = le32_to_cpu(*(u32*)buf);
 158         DEBUG("ReparseTag = %#x", *reparse_tag_ret);
 159         ret = 0;
 160 out_close_ntfs_attr:
 161         ntfs_attr_close(na);
 162 out:
 163         return ret;
 164
 165 }
 166
 167 /* Load the streams from a file or reparse point in the NTFS volume into the WIM
 168  * lookup table */
 169 static int
 170 capture_ntfs_streams(struct wim_inode *inode,
 171                      ntfs_inode *ni,
 172                      char *path,
 173                      size_t path_len,
 174                      struct wim_lookup_table *lookup_table,
 175                      ntfs_volume *vol,
 176                      ATTR_TYPES type)
 177 {
 178         ntfs_attr_search_ctx *actx;
 179         struct ntfs_location *ntfs_loc;
 180         int ret;
 181         struct wim_lookup_table_entry *lte;
 182
 183         DEBUG2("Capturing NTFS data streams from `%s'", path);
 184
 185         /* Get context to search the streams of the NTFS file. */
 186         actx = ntfs_attr_get_search_ctx(ni, NULL);
 187         if (!actx) {
 188                 ERROR_WITH_ERRNO("Cannot get NTFS attribute search "
 189                                  "context");
 190                 return WIMLIB_ERR_NTFS_3G;
 191         }
 192
 193         /* Capture each data stream or reparse data stream. */
 194         while (!ntfs_attr_lookup(type, NULL, 0,
 195                                  CASE_SENSITIVE, 0, NULL, 0, actx))
 196         {
 197                 u64 data_size = ntfs_get_attribute_value_length(actx->attr);
 198                 u64 name_length = actx->attr->name_length;
 199                 u32 stream_id;
 200
 201                 if (data_size == 0) {
 202                         /* Empty stream.  No lookup table entry is needed. */
 203                         lte = NULL;
 204                         ntfs_loc = NULL;
 205                 } else {
 206                         ntfs_loc = CALLOC(1, sizeof(*ntfs_loc));
 207                         if (!ntfs_loc) {
 208                                 ret = WIMLIB_ERR_NOMEM;
 209                                 goto out_put_actx;
 210                         }
 211                         ntfs_loc->ntfs_vol = vol;
 212                         ntfs_loc->path = MALLOC(path_len + 1);
 213                         if (!ntfs_loc->path) {
 214                                 ret = WIMLIB_ERR_NOMEM;
 215                                 goto out_free_ntfs_loc;
 216                         }
 217                         memcpy(ntfs_loc->path, path, path_len + 1);
 218                         if (name_length) {
 219                                 ntfs_loc->stream_name = MALLOC(name_length * 2);
 220                                 if (!ntfs_loc->stream_name) {
 221                                         ret = WIMLIB_ERR_NOMEM;
 222                                         goto out_free_ntfs_loc;
 223                                 }
 224                                 memcpy(ntfs_loc->stream_name,
 225                                        attr_record_name(actx->attr),
 226                                        actx->attr->name_length * 2);
 227                                 ntfs_loc->stream_name_nchars = name_length;
 228                         }
 229
 230                         lte = new_lookup_table_entry();
 231                         if (!lte) {
 232                                 ret = WIMLIB_ERR_NOMEM;
 233                                 goto out_free_ntfs_loc;
 234                         }
 235                         lte->resource_location = RESOURCE_IN_NTFS_VOLUME;
 236                         lte->ntfs_loc = ntfs_loc;
 237                         ntfs_loc = NULL;
 238                         if (type == AT_REPARSE_POINT) {
 239                                 if (data_size < 8) {
 240                                         ERROR("Invalid reparse data (only %u bytes)!",
 241                                               (unsigned)data_size);
 242                                         ret = WIMLIB_ERR_NTFS_3G;
 243                                         goto out_free_lte;
 244                                 }
 245                                 lte->ntfs_loc->is_reparse_point = true;
 246                                 lte->resource_entry.original_size = data_size - 8;
 247                                 ret = read_reparse_tag(ni, lte->ntfs_loc,
 248                                                        &inode->i_reparse_tag);
 249                                 if (ret)
 250                                         goto out_free_lte;
 251                         } else {
 252                                 lte->ntfs_loc->is_reparse_point = false;
 253                                 lte->resource_entry.original_size = data_size;
 254                         }
 255                 }
 256                 if (name_length == 0) {
 257                         /* Unnamed data stream.  Put the reference to it in the
 258                          * dentry's inode. */
 259                         if (inode->i_lte) {
 260                                 ERROR("Found two un-named data streams for `%s'",
 261                                       path);
 262                                 ret = WIMLIB_ERR_NTFS_3G;
 263                                 goto out_free_lte;
 264                         }
 265                         stream_id = 0;
 266                         inode->i_lte = lte;
 267                 } else {
 268                         /* Named data stream.  Put the reference to it in the
 269                          * alternate data stream entries */
 270                         struct wim_ads_entry *new_ads_entry;
 271
 272                         new_ads_entry = inode_add_ads_utf16le(inode,
 273                                                               attr_record_name(actx->attr),
 274                                                               name_length * 2);
 275                         if (!new_ads_entry) {
 276                                 ret = WIMLIB_ERR_NOMEM;
 277                                 goto out_free_lte;
 278                         }
 279                         wimlib_assert(new_ads_entry->stream_name_nbytes == name_length * 2);
 280                         stream_id = new_ads_entry->stream_id;
 281                         new_ads_entry->lte = lte;
 282                 }
 283                 if (lte) {
 284                         lookup_table_insert_unhashed(lookup_table, lte,
 285                                                      inode, stream_id);
 286                 }
 287         }
 288         if (errno == ENOENT) {
 289                 ret = 0;
 290         } else {
 291                 ERROR_WITH_ERRNO("Error listing NTFS attributes from `%s'",
 292                                  path);
 293                 ret = WIMLIB_ERR_NTFS_3G;
 294         }
 295         goto out_put_actx;
 296 out_free_lte:
 297         free_lookup_table_entry(lte);
 298 out_free_ntfs_loc:
 299         if (ntfs_loc) {
 300                 FREE(ntfs_loc->path);
 301                 FREE(ntfs_loc->stream_name);
 302                 FREE(ntfs_loc);
 303         }
 304 out_put_actx:
 305         ntfs_attr_put_search_ctx(actx);
 306         if (ret == 0)
 307                 DEBUG2("Successfully captured NTFS streams from `%s'", path);
 308         else
 309                 ERROR("Failed to capture NTFS streams from `%s'", path);
 310         return ret;
 311 }
 312
 313 /* Red-black tree that maps NTFS inode numbers to DOS names */
 314 struct dos_name_map {
 315         struct rb_root rb_root;
 316 };
 317
 318 struct dos_name_node {
 319         struct rb_node rb_node;
 320         char dos_name[24];
 321         int name_nbytes;
 322         u64 ntfs_ino;
 323 };
 324
 325 /* Inserts a new DOS name into the map */
 326 static int
 327 insert_dos_name(struct dos_name_map *map, const ntfschar *dos_name,
 328                 size_t name_nbytes, u64 ntfs_ino)
 329 {
 330         struct dos_name_node *new_node;
 331         struct rb_node **p;
 332         struct rb_root *root;
 333         struct rb_node *rb_parent;
 334
 335         DEBUG("DOS name_len = %zu", name_nbytes);
 336         new_node = MALLOC(sizeof(struct dos_name_node));
 337         if (!new_node)
 338                 return -1;
 339
 340         /* DOS names are supposed to be 12 characters max (that's 24 bytes,
 341          * assuming 2-byte ntfs characters) */
 342         wimlib_assert(name_nbytes <= sizeof(new_node->dos_name));
 343
 344         /* Initialize the DOS name, DOS name length, and NTFS inode number of
 345          * the red-black tree node */
 346         memcpy(new_node->dos_name, dos_name, name_nbytes);
 347         new_node->name_nbytes = name_nbytes;
 348         new_node->ntfs_ino = ntfs_ino;
 349
 350         /* Insert the red-black tree node */
 351         root = &map->rb_root;
 352         p = &root->rb_node;
 353         rb_parent = NULL;
 354         while (*p) {
 355                 struct dos_name_node *this;
 356
 357                 this = container_of(*p, struct dos_name_node, rb_node);
 358                 rb_parent = *p;
 359                 if (new_node->ntfs_ino < this->ntfs_ino)
 360                         p = &((*p)->rb_left);
 361                 else if (new_node->ntfs_ino > this->ntfs_ino)
 362                         p = &((*p)->rb_right);
 363                 else {
 364                         /* This should be impossible since a NTFS inode cannot
 365                          * have multiple DOS names, and we only should get each
 366                          * DOS name entry once from the ntfs_readdir() calls. */
 367                         ERROR("NTFS inode %"PRIu64" has multiple DOS names",
 368                               ntfs_ino);
 369                         return -1;
 370                 }
 371         }
 372         rb_link_node(&new_node->rb_node, rb_parent, p);
 373         rb_insert_color(&new_node->rb_node, root);
 374         DEBUG("Inserted DOS name for inode %"PRIu64, ntfs_ino);
 375         return 0;
 376 }
 377
 378 /* Returns a structure that contains the DOS name and its length for a NTFS
 379  * inode, or NULL if the inode has no DOS name. */
 380 static struct dos_name_node *
 381 lookup_dos_name(const struct dos_name_map *map, u64 ntfs_ino)
 382 {
 383         struct rb_node *node = map->rb_root.rb_node;
 384         while (node) {
 385                 struct dos_name_node *this;
 386                 this = container_of(node, struct dos_name_node, rb_node);
 387                 if (ntfs_ino < this->ntfs_ino)
 388                         node = node->rb_left;
 389                 else if (ntfs_ino > this->ntfs_ino)
 390                         node = node->rb_right;
 391                 else
 392                         return this;
 393         }
 394         return NULL;
 395 }
 396
 397 static int
 398 set_dentry_dos_name(struct wim_dentry *dentry, void *arg)
 399 {
 400         const struct dos_name_map *map = arg;
 401         const struct dos_name_node *node;
 402
 403         if (dentry->is_win32_name) {
 404                 node = lookup_dos_name(map, dentry->d_inode->i_ino);
 405                 if (node) {
 406                         dentry->short_name = MALLOC(node->name_nbytes + 2);
 407                         if (!dentry->short_name)
 408                                 return WIMLIB_ERR_NOMEM;
 409                         memcpy(dentry->short_name, node->dos_name,
 410                                node->name_nbytes);
 411                         dentry->short_name[node->name_nbytes / 2] = 0;
 412                         dentry->short_name_nbytes = node->name_nbytes;
 413                         DEBUG("Assigned DOS name to ino %"PRIu64,
 414                               dentry->d_inode->i_ino);
 415                 } else {
 416                         WARNING("NTFS inode %"PRIu64" has Win32 name with no "
 417                                 "corresponding DOS name",
 418                                 dentry->d_inode->i_ino);
 419                 }
 420         }
 421         return 0;
 422 }
 423
 424 static void
 425 free_dos_name_tree(struct rb_node *node) {
 426         if (node) {
 427                 free_dos_name_tree(node->rb_left);
 428                 free_dos_name_tree(node->rb_right);
 429                 FREE(container_of(node, struct dos_name_node, rb_node));
 430         }
 431 }
 432
 433 static void
 434 destroy_dos_name_map(struct dos_name_map *map)
 435 {
 436         free_dos_name_tree(map->rb_root.rb_node);
 437 }
 438
 439 struct readdir_ctx {
 440         struct wim_dentry *parent;
 441         ntfs_inode *dir_ni;
 442         char *path;
 443         size_t path_len;
 444         struct wim_lookup_table *lookup_table;
 445         struct wim_inode_table *inode_table;
 446         struct sd_set *sd_set;
 447         struct dos_name_map *dos_name_map;
 448         const struct wimlib_capture_config *config;
 449         ntfs_volume *vol;
 450         int add_image_flags;
 451         wimlib_progress_func_t progress_func;
 452 };
 453
 454 static int
 455 build_dentry_tree_ntfs_recursive(struct wim_dentry **root_p,
 456                                  ntfs_inode *dir_ni,
 457                                  ntfs_inode *ni,
 458                                  char *path,
 459                                  size_t path_len,
 460                                  int name_type,
 461                                  struct wim_lookup_table *lookup_table,
 462                                  struct wim_inode_table *inode_table,
 463                                  struct sd_set *sd_set,
 464                                  const struct wimlib_capture_config *config,
 465                                  ntfs_volume *ntfs_vol,
 466                                  int add_image_flags,
 467                                  wimlib_progress_func_t progress_func);
 468
 469 static int
 470 wim_ntfs_capture_filldir(void *dirent, const ntfschar *name,
 471                          const int name_nchars, const int name_type,
 472                          const s64 pos, const MFT_REF mref,
 473                          const unsigned dt_type)
 474 {
 475         struct readdir_ctx *ctx;
 476         size_t mbs_name_nbytes;
 477         char *mbs_name;
 478         struct wim_dentry *child;
 479         int ret;
 480         size_t path_len;
 481         size_t name_nbytes = name_nchars * sizeof(ntfschar);
 482
 483         ctx = dirent;
 484         if (name_type & FILE_NAME_DOS) {
 485                 /* If this is the entry for a DOS name, store it for later. */
 486                 ret = insert_dos_name(ctx->dos_name_map, name,
 487                                       name_nbytes, mref & MFT_REF_MASK_CPU);
 488
 489                 /* Return now if an error occurred or if this is just a DOS name
 490                  * and not a Win32+DOS name. */
 491                 if (ret != 0 || name_type == FILE_NAME_DOS)
 492                         goto out;
 493         }
 494         ret = utf16le_to_tstr(name, name_nbytes,
 495                               &mbs_name, &mbs_name_nbytes);
 496         if (ret)
 497                 goto out;
 498
 499         if (mbs_name[0] == '.' &&
 500              (mbs_name[1] == '\0' ||
 501               (mbs_name[1] == '.' && mbs_name[2] == '\0'))) {
 502                 /* . or .. entries
 503                  *
 504                  * note: name_type is POSIX for these, so DOS names will not
 505                  * have been inserted for them.  */
 506                 ret = 0;
 507                 goto out_free_mbs_name;
 508         }
 509
 510         /* Open the inode for this directory entry and recursively capture the
 511          * directory tree rooted at it */
 512         ntfs_inode *ni = ntfs_inode_open(ctx->dir_ni->vol, mref);
 513         if (!ni) {
 514                 ERROR_WITH_ERRNO("Failed to open NTFS inode");
 515                 ret = -1;
 516                 goto out_free_mbs_name;
 517         }
 518         path_len = ctx->path_len;
 519         if (path_len != 1)
 520                 ctx->path[path_len++] = '/';
 521         memcpy(ctx->path + path_len, mbs_name, mbs_name_nbytes + 1);
 522         path_len += mbs_name_nbytes;
 523         child = NULL;
 524         ret = build_dentry_tree_ntfs_recursive(&child, ctx->dir_ni,
 525                                                ni, ctx->path, path_len, name_type,
 526                                                ctx->lookup_table,
 527                                                ctx->inode_table,
 528                                                ctx->sd_set,
 529                                                ctx->config, ctx->vol,
 530                                                ctx->add_image_flags,
 531                                                ctx->progress_func);
 532         if (child)
 533                 dentry_add_child(ctx->parent, child);
 534         ntfs_inode_close(ni);
 535 out_free_mbs_name:
 536         FREE(mbs_name);
 537 out:
 538         return ret;
 539 }
 540
 541 /* Recursively build a WIM dentry tree corresponding to a NTFS volume.
 542  * At the same time, update the WIM lookup table with lookup table entries for
 543  * the NTFS streams, and build an array of security descriptors.
 544  */
 545 static int
 546 build_dentry_tree_ntfs_recursive(struct wim_dentry **root_ret,
 547                                  ntfs_inode *dir_ni,
 548                                  ntfs_inode *ni,
 549                                  char *path,
 550                                  size_t path_len,
 551                                  int name_type,
 552                                  struct wim_lookup_table *lookup_table,
 553                                  struct wim_inode_table *inode_table,
 554                                  struct sd_set *sd_set,
 555                                  const struct wimlib_capture_config *config,
 556                                  ntfs_volume *vol,
 557                                  int add_image_flags,
 558                                  wimlib_progress_func_t progress_func)
 559 {
 560         u32 attributes;
 561         int ret;
 562         struct wim_dentry *root;
 563         struct wim_inode *inode;
 564         ATTR_TYPES stream_type;
 565
 566         if (exclude_path(path, path_len, config, false)) {
 567                 /* Exclude a file or directory tree based on the capture
 568                  * configuration file */
 569                 if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_EXCLUDE_VERBOSE)
 570                     && progress_func)
 571                 {
 572                         union wimlib_progress_info info;
 573                         info.scan.cur_path = path;
 574                         info.scan.excluded = true;
 575                         progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
 576                 }
 577                 root = NULL;
 578                 ret = 0;
 579                 goto out;
 580         }
 581
 582         /* Get file attributes */
 583         struct SECURITY_CONTEXT ctx;
 584         memset(&ctx, 0, sizeof(ctx));
 585         ctx.vol = vol;
 586         ret = ntfs_xattr_system_getxattr(&ctx, XATTR_NTFS_ATTRIB,
 587                                          ni, dir_ni, (char *)&attributes,
 588                                          sizeof(u32));
 589         if (ret != 4) {
 590                 ERROR_WITH_ERRNO("Failed to get NTFS attributes from `%s'",
 591                                  path);
 592                 return WIMLIB_ERR_NTFS_3G;
 593         }
 594
 595         if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE)
 596             && progress_func)
 597         {
 598                 union wimlib_progress_info info;
 599                 info.scan.cur_path = path;
 600                 info.scan.excluded = false;
 601                 progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
 602         }
 603
 604         /* Create a WIM dentry with an associated inode, which may be shared */
 605         ret = inode_table_new_dentry(inode_table,
 606                                      path_basename_with_len(path, path_len),
 607                                      ni->mft_no,
 608                                      0,
 609                                      &root);
 610         if (ret)
 611                 return ret;
 612
 613         inode = root->d_inode;
 614
 615         if (inode->i_nlink > 1) /* Shared inode; nothing more to do */
 616                 goto out;
 617
 618         if (name_type & FILE_NAME_WIN32) /* Win32 or Win32+DOS name (rather than POSIX) */
 619                 root->is_win32_name = 1;
 620         inode->i_creation_time    = le64_to_cpu(ni->creation_time);
 621         inode->i_last_write_time  = le64_to_cpu(ni->last_data_change_time);
 622         inode->i_last_access_time = le64_to_cpu(ni->last_access_time);
 623         inode->i_attributes       = le32_to_cpu(attributes);
 624         inode->i_resolved         = 1;
 625
 626         if (attributes & FILE_ATTR_REPARSE_POINT)
 627                 stream_type = AT_REPARSE_POINT;
 628         else
 629                 stream_type = AT_DATA;
 630
 631         /* Capture the file's streams; more specifically, this is supposed to:
 632          *
 633          * - Regular files: capture unnamed data stream and any named data
 634          *   streams
 635          * - Directories: capture any named data streams
 636          * - Reparse points: capture reparse data only
 637          */
 638         ret = capture_ntfs_streams(inode, ni, path, path_len, lookup_table,
 639                                    vol, stream_type);
 640         if (ret)
 641                 goto out;
 642
 643         if (ni->mrec->flags & MFT_RECORD_IS_DIRECTORY) {
 644
 645                 /* Recurse to directory children */
 646                 s64 pos = 0;
 647                 struct dos_name_map dos_name_map = { .rb_root = {.rb_node = NULL} };
 648                 struct readdir_ctx ctx = {
 649                         .parent          = root,
 650                         .dir_ni          = ni,
 651                         .path            = path,
 652                         .path_len        = path_len,
 653                         .lookup_table    = lookup_table,
 654                         .inode_table     = inode_table,
 655                         .sd_set          = sd_set,
 656                         .dos_name_map    = &dos_name_map,
 657                         .config          = config,
 658                         .vol             = vol,
 659                         .add_image_flags = add_image_flags,
 660                         .progress_func   = progress_func,
 661                 };
 662                 ret = ntfs_readdir(ni, &pos, &ctx, wim_ntfs_capture_filldir);
 663                 if (ret) {
 664                         ERROR_WITH_ERRNO("ntfs_readdir()");
 665                         ret = WIMLIB_ERR_NTFS_3G;
 666                 } else {
 667                         ret = for_dentry_child(root, set_dentry_dos_name,
 668                                                &dos_name_map);
 669                 }
 670                 destroy_dos_name_map(&dos_name_map);
 671                 if (ret)
 672                         goto out;
 673         }
 674
 675         if (!(add_image_flags & WIMLIB_ADD_IMAGE_FLAG_NO_ACLS)) {
 676                 /* Get security descriptor */
 677                 char _sd[1];
 678                 char *sd = _sd;
 679                 errno = 0;
 680                 ret = ntfs_xattr_system_getxattr(&ctx, XATTR_NTFS_ACL,
 681                                                  ni, dir_ni, sd,
 682                                                  sizeof(sd));
 683                 if (ret > sizeof(sd)) {
 684                         sd = alloca(ret);
 685                         ret = ntfs_xattr_system_getxattr(&ctx, XATTR_NTFS_ACL,
 686                                                          ni, dir_ni, sd, ret);
 687                 }
 688                 if (ret > 0) {
 689                         inode->i_security_id = sd_set_add_sd(sd_set, sd, ret);
 690                         if (inode->i_security_id == -1) {
 691                                 ERROR("Out of memory");
 692                                 ret = WIMLIB_ERR_NOMEM;
 693                                 goto out;
 694                         }
 695                         DEBUG("Added security ID = %u for `%s'",
 696                               inode->i_security_id, path);
 697                         ret = 0;
 698                 } else if (ret < 0) {
 699                         ERROR_WITH_ERRNO("Failed to get security information from "
 700                                          "`%s'", path);
 701                         ret = WIMLIB_ERR_NTFS_3G;
 702                 } else {
 703                         inode->i_security_id = -1;
 704                         DEBUG("No security ID for `%s'", path);
 705                 }
 706         }
 707 out:
 708         if (ret == 0)
 709                 *root_ret = root;
 710         else
 711                 free_dentry_tree(root, lookup_table);
 712         return ret;
 713 }
 714
 715
 716 int
 717 do_ntfs_umount(struct _ntfs_volume *vol)
 718 {
 719         DEBUG("Unmounting NTFS volume");
 720         if (ntfs_umount(vol, FALSE))
 721                 return WIMLIB_ERR_NTFS_3G;
 722         else
 723                 return 0;
 724 }
 725
 726 int
 727 build_dentry_tree_ntfs(struct wim_dentry **root_p,
 728                        const char *device,
 729                        struct wim_lookup_table *lookup_table,
 730                        struct wim_inode_table *inode_table,
 731                        struct sd_set *sd_set,
 732                        const struct wimlib_capture_config *config,
 733                        int add_image_flags,
 734                        wimlib_progress_func_t progress_func,
 735                        void *extra_arg)
 736 {
 737         ntfs_volume *vol;
 738         ntfs_inode *root_ni;
 739         int ret;
 740
 741         DEBUG("Mounting NTFS volume `%s' read-only", device);
 742
 743 #ifdef HAVE_NTFS_MNT_RDONLY
 744         /* NTFS-3g 2013 */
 745         vol = ntfs_mount(device, NTFS_MNT_RDONLY);
 746 #else
 747         /* NTFS-3g 2011, 2012 */
 748         vol = ntfs_mount(device, MS_RDONLY);
 749 #endif
 750         if (!vol) {
 751                 ERROR_WITH_ERRNO("Failed to mount NTFS volume `%s' read-only",
 752                                  device);
 753                 return WIMLIB_ERR_NTFS_3G;
 754         }
 755         ntfs_open_secure(vol);
 756
 757         /* We don't want to capture the special NTFS files such as $Bitmap.  Not
 758          * to be confused with "hidden" or "system" files which are real files
 759          * that we do need to capture.  */
 760         NVolClearShowSysFiles(vol);
 761
 762         DEBUG("Opening root NTFS dentry");
 763         root_ni = ntfs_inode_open(vol, FILE_root);
 764         if (!root_ni) {
 765                 ERROR_WITH_ERRNO("Failed to open root inode of NTFS volume "
 766                                  "`%s'", device);
 767                 ret = WIMLIB_ERR_NTFS_3G;
 768                 goto out;
 769         }
 770
 771         /* Currently we assume that all the paths fit into this length and there
 772          * is no check for overflow. */
 773         char *path = MALLOC(32768);
 774         if (!path) {
 775                 ERROR("Could not allocate memory for NTFS pathname");
 776                 ret = WIMLIB_ERR_NOMEM;
 777                 goto out_cleanup;
 778         }
 779
 780         path[0] = '/';
 781         path[1] = '\0';
 782         ret = build_dentry_tree_ntfs_recursive(root_p, NULL, root_ni, path, 1,
 783                                                FILE_NAME_POSIX, lookup_table,
 784                                                inode_table,
 785                                                sd_set,
 786                                                config, vol,
 787                                                add_image_flags,
 788                                                progress_func);
 789 out_cleanup:
 790         FREE(path);
 791         ntfs_inode_close(root_ni);
 792 out:
 793         ntfs_index_ctx_put(vol->secure_xsii);
 794         ntfs_index_ctx_put(vol->secure_xsdh);
 795         ntfs_inode_close(vol->secure_ni);
 796
 797         if (ret) {
 798                 if (do_ntfs_umount(vol)) {
 799                         ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'",
 800                                          device);
 801                         if (ret == 0)
 802                                 ret = WIMLIB_ERR_NTFS_3G;
 803                 }
 804         } else {
 805                 /* We need to leave the NTFS volume mounted so that we can read
 806                  * the NTFS files again when we are actually writing the WIM */
 807                 *(ntfs_volume**)extra_arg = vol;
 808         }
 809         return ret;
 810 }