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   1 /*
   2  * ntfs-apply.c
   3  *
   4  * Apply a WIM image to a NTFS volume.  We restore everything we can, including
   5  * security data and alternate data streams.
   6  */
   7
   8 /*
   9  * Copyright (C) 2012 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 #ifdef WITH_NTFS_3G
  31 #include <ntfs-3g/endians.h>
  32 #include <ntfs-3g/types.h>
  33 #endif
  34
  35 #include "wimlib_internal.h"
  36
  37
  38 #ifdef WITH_NTFS_3G
  39 #include "dentry.h"
  40 #include "lookup_table.h"
  41 #include "io.h"
  42 #include <ntfs-3g/layout.h>
  43 #include <ntfs-3g/acls.h>
  44 #include <ntfs-3g/attrib.h>
  45 #include <ntfs-3g/security.h> /* security.h before xattrs.h */
  46 #include <ntfs-3g/xattrs.h>
  47 #include <ntfs-3g/reparse.h>
  48 #include <stdlib.h>
  49 #include <unistd.h>
  50
  51 struct ntfs_apply_args {
  52         ntfs_volume *vol;
  53         int extract_flags;
  54         WIMStruct *w;
  55 };
  56
  57
  58 #if 0
  59 extern int ntfs_set_inode_security(ntfs_inode *ni, u32 selection,
  60                                    const char *attr);
  61 extern int ntfs_set_inode_attributes(ntfs_inode *ni, u32 attrib);
  62 #endif
  63
  64 /*
  65  * Extracts a WIM resource to a NTFS attribute.
  66  */
  67 static int
  68 extract_wim_resource_to_ntfs_attr(const struct lookup_table_entry *lte,
  69                                   ntfs_attr *na)
  70 {
  71         u64 bytes_remaining = wim_resource_size(lte);
  72         u8 buf[min(WIM_CHUNK_SIZE, bytes_remaining)];
  73         u64 offset = 0;
  74         int ret = 0;
  75         u8 hash[SHA1_HASH_SIZE];
  76
  77         SHA_CTX ctx;
  78         sha1_init(&ctx);
  79
  80         while (bytes_remaining) {
  81                 u64 to_read = min(bytes_remaining, WIM_CHUNK_SIZE);
  82                 ret = read_wim_resource(lte, buf, to_read, offset, false);
  83                 if (ret != 0)
  84                         break;
  85                 sha1_update(&ctx, buf, to_read);
  86                 if (ntfs_attr_pwrite(na, offset, to_read, buf) != to_read) {
  87                         ERROR_WITH_ERRNO("Error extracting WIM resource");
  88                         return WIMLIB_ERR_WRITE;
  89                 }
  90                 bytes_remaining -= to_read;
  91                 offset += to_read;
  92         }
  93         sha1_final(hash, &ctx);
  94         if (!hashes_equal(hash, lte->hash)) {
  95                 ERROR("Invalid checksum on a WIM resource "
  96                       "(detected when extracting to NTFS stream)");
  97                 ERROR("The following WIM resource is invalid:");
  98                 print_lookup_table_entry(lte);
  99                 return WIMLIB_ERR_INVALID_RESOURCE_HASH;
 100         }
 101         return 0;
 102 }
 103
 104 /* Writes the data streams to a NTFS file
 105  *
 106  * @ni:      The NTFS inode for the file.
 107  * @inode:   The WIM dentry that has an inode containing the streams.
 108  * @w:       The WIMStruct for the WIM containing the image we are applying.
 109  *
 110  * Returns 0 on success, nonzero on failure.
 111  */
 112 static int write_ntfs_data_streams(ntfs_inode *ni, const struct dentry *dentry,
 113                                    WIMStruct *w)
 114 {
 115         int ret = 0;
 116         unsigned stream_idx = 0;
 117         ntfschar *stream_name = AT_UNNAMED;
 118         u32 stream_name_len = 0;
 119         const struct inode *inode = dentry->inode;
 120
 121         DEBUG("Writing %u NTFS data stream%s for `%s'",
 122               inode->num_ads + 1,
 123               (inode->num_ads == 0 ? "" : "s"),
 124               dentry->full_path_utf8);
 125
 126         while (1) {
 127                 struct lookup_table_entry *lte;
 128                 ntfs_attr *na;
 129
 130                 lte = inode_stream_lte(inode, stream_idx, w->lookup_table);
 131
 132                 if (stream_name_len) {
 133                         /* Create an empty named stream. */
 134                         ret = ntfs_attr_add(ni, AT_DATA, stream_name,
 135                                             stream_name_len, NULL, 0);
 136                         if (ret != 0) {
 137                                 ERROR_WITH_ERRNO("Failed to create name data "
 138                                                  "stream for extracted file "
 139                                                  "`%s'",
 140                                                  dentry->full_path_utf8);
 141                                 ret = WIMLIB_ERR_NTFS_3G;
 142                                 break;
 143
 144                         }
 145                 }
 146                 /* If there's no lookup table entry, it's an empty stream.
 147                  * Otherwise, we must open the attribute and extract the data.
 148                  * */
 149                 if (lte) {
 150                         na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len);
 151                         if (!na) {
 152                                 ERROR_WITH_ERRNO("Failed to open a data stream of "
 153                                                  "extracted file `%s'",
 154                                                  dentry->full_path_utf8);
 155                                 ret = WIMLIB_ERR_NTFS_3G;
 156                                 break;
 157                         }
 158                         ret = extract_wim_resource_to_ntfs_attr(lte, na);
 159                         if (ret != 0)
 160                                 break;
 161                         ntfs_attr_close(na);
 162                 }
 163                 if (stream_idx == inode->num_ads)
 164                         break;
 165                 stream_name = (ntfschar*)inode->ads_entries[stream_idx].stream_name;
 166                 stream_name_len = inode->ads_entries[stream_idx].stream_name_len / 2;
 167                 stream_idx++;
 168         }
 169         return ret;
 170 }
 171
 172 /*
 173  * Makes a NTFS hard link
 174  *
 175  * It is named @from_dentry->file_name and is located under the directory
 176  * specified by @dir_ni, and it is made to point to the previously extracted
 177  * file located at @inode->extracted_file.
 178  *
 179  * Return 0 on success, nonzero on failure.
 180  */
 181 static int wim_apply_hardlink_ntfs(const struct dentry *from_dentry,
 182                                    const struct inode *inode,
 183                                    ntfs_inode *dir_ni,
 184                                    ntfs_inode **to_ni_ret)
 185 {
 186         int ret;
 187         char *p;
 188         char orig;
 189         const char *dir_name;
 190
 191         ntfs_inode *to_ni;
 192         ntfs_volume *vol;
 193
 194         wimlib_assert(dentry_is_regular_file(from_dentry)
 195                         && inode_is_regular_file(inode));
 196
 197         if (ntfs_inode_close(dir_ni) != 0) {
 198                 ERROR_WITH_ERRNO("Error closing directory");
 199                 return WIMLIB_ERR_NTFS_3G;
 200         }
 201
 202         vol = dir_ni->vol;
 203
 204         DEBUG("Extracting NTFS hard link `%s' => `%s'",
 205               from_dentry->full_path_utf8, inode->extracted_file);
 206
 207         to_ni = ntfs_pathname_to_inode(vol, NULL, inode->extracted_file);
 208         if (!to_ni) {
 209                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 210                                  inode->extracted_file);
 211                 return WIMLIB_ERR_NTFS_3G;
 212         }
 213         p = from_dentry->full_path_utf8 + from_dentry->full_path_utf8_len;
 214         do {
 215                 p--;
 216         } while (*p != '/');
 217
 218         orig = *p;
 219         *p = '\0';
 220         dir_name = from_dentry->full_path_utf8;
 221
 222         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 223         if (!dir_ni) {
 224                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 225                                  from_dentry->full_path_utf8);
 226                 *p = orig;
 227                 return WIMLIB_ERR_NTFS_3G;
 228         }
 229         *p = orig;
 230
 231         ret = ntfs_link(to_ni, dir_ni,
 232                         (ntfschar*)from_dentry->file_name,
 233                         from_dentry->file_name_len / 2);
 234         if (ret != 0) {
 235                 ERROR_WITH_ERRNO("Could not create hard link `%s' => `%s'",
 236                                  from_dentry->full_path_utf8,
 237                                  inode->extracted_file);
 238                 ret = WIMLIB_ERR_NTFS_3G;
 239         }
 240         *to_ni_ret = to_ni;
 241         return ret;
 242 }
 243
 244 static int
 245 apply_file_attributes_and_security_data(ntfs_inode *ni,
 246                                         ntfs_inode *dir_ni,
 247                                         const struct dentry *dentry,
 248                                         const WIMStruct *w)
 249 {
 250         DEBUG("Setting NTFS file attributes on `%s' to %#"PRIx32,
 251               dentry->full_path_utf8, dentry->inode->attributes);
 252         int ret;
 253         struct SECURITY_CONTEXT ctx;
 254         u32 attributes_le32;
 255         attributes_le32 = cpu_to_le32(dentry->inode->attributes);
 256         memset(&ctx, 0, sizeof(ctx));
 257         ctx.vol = ni->vol;
 258         ret = ntfs_xattr_system_setxattr(&ctx, XATTR_NTFS_ATTRIB,
 259                                          ni, dir_ni,
 260                                          (const char*)&attributes_le32,
 261                                          sizeof(u32), 0);
 262         if (ret != 0) {
 263                 ERROR("Failed to set NTFS file attributes on `%s'",
 264                        dentry->full_path_utf8);
 265                 return WIMLIB_ERR_NTFS_3G;
 266         }
 267         if (dentry->inode->security_id != -1) {
 268                 const struct wim_security_data *sd;
 269                 const char *descriptor;
 270
 271                 sd = wim_const_security_data(w);
 272                 wimlib_assert(dentry->inode->security_id < sd->num_entries);
 273                 descriptor = sd->descriptors[dentry->inode->security_id];
 274                 DEBUG("Applying security descriptor %d to `%s'",
 275                       dentry->inode->security_id, dentry->full_path_utf8);
 276
 277                 ret = ntfs_xattr_system_setxattr(&ctx, XATTR_NTFS_ACL,
 278                                                  ni, dir_ni, descriptor,
 279                                                  sd->sizes[dentry->inode->security_id], 0);
 280
 281                 if (ret != 0) {
 282                         ERROR_WITH_ERRNO("Failed to set security data on `%s'",
 283                                         dentry->full_path_utf8);
 284                         return WIMLIB_ERR_NTFS_3G;
 285                 }
 286         }
 287         return 0;
 288 }
 289
 290 static int apply_reparse_data(ntfs_inode *ni, const struct dentry *dentry,
 291                               const WIMStruct *w)
 292 {
 293         struct lookup_table_entry *lte;
 294         int ret = 0;
 295
 296         wimlib_assert(dentry->inode->attributes & FILE_ATTRIBUTE_REPARSE_POINT);
 297
 298         lte = inode_unnamed_lte(dentry->inode, w->lookup_table);
 299
 300         DEBUG("Applying reparse data to `%s'", dentry->full_path_utf8);
 301
 302         if (!lte) {
 303                 ERROR("Could not find reparse data for `%s'",
 304                       dentry->full_path_utf8);
 305                 return WIMLIB_ERR_INVALID_DENTRY;
 306         }
 307
 308         if (wim_resource_size(lte) >= 0xffff) {
 309                 ERROR("Reparse data of `%s' is too long (%lu bytes)",
 310                       dentry->full_path_utf8, wim_resource_size(lte));
 311                 return WIMLIB_ERR_INVALID_DENTRY;
 312         }
 313
 314         u8 reparse_data_buf[8 + wim_resource_size(lte)];
 315         u8 *p = reparse_data_buf;
 316         p = put_u32(p, dentry->inode->reparse_tag); /* ReparseTag */
 317         p = put_u16(p, wim_resource_size(lte)); /* ReparseDataLength */
 318         p = put_u16(p, 0); /* Reserved */
 319
 320         ret = read_full_wim_resource(lte, p);
 321         if (ret != 0)
 322                 return ret;
 323
 324         ret = ntfs_set_ntfs_reparse_data(ni, (char*)reparse_data_buf,
 325                                          wim_resource_size(lte) + 8, 0);
 326         if (ret != 0) {
 327                 ERROR_WITH_ERRNO("Failed to set NTFS reparse data on `%s'",
 328                                  dentry->full_path_utf8);
 329                 return WIMLIB_ERR_NTFS_3G;
 330         }
 331         return 0;
 332 }
 333
 334 static int do_wim_apply_dentry_ntfs(struct dentry *dentry, ntfs_inode *dir_ni,
 335                                     WIMStruct *w);
 336
 337 /*
 338  * If @dentry is part of a hard link group, search for hard-linked dentries in
 339  * the same directory that have a nonempty DOS (short) filename.  There should
 340  * be exactly 0 or 1 such dentries.  If there is 1, extract that dentry first,
 341  * so that the DOS name is correctly associated with the corresponding long name
 342  * in the Win32 namespace, and not any of the additional names in the POSIX
 343  * namespace created from hard links.
 344  */
 345 static int preapply_dentry_with_dos_name(struct dentry *dentry,
 346                                          ntfs_inode **dir_ni_p,
 347                                          WIMStruct *w)
 348 {
 349         struct dentry *other;
 350         struct dentry *dentry_with_dos_name;
 351
 352         dentry_with_dos_name = NULL;
 353         inode_for_each_dentry(other, dentry->inode) {
 354                 if (other != dentry && (dentry->parent == other->parent)
 355                     && other->short_name_len)
 356                 {
 357                         if (dentry_with_dos_name) {
 358                                 ERROR("Found multiple DOS names for file `%s' "
 359                                       "in the same directory",
 360                                       dentry_with_dos_name->full_path_utf8);
 361                                 return WIMLIB_ERR_INVALID_DENTRY;
 362                         }
 363                         dentry_with_dos_name = other;
 364                 }
 365         }
 366         /* If there's a dentry with a DOS name, extract it first */
 367         if (dentry_with_dos_name && !dentry_is_extracted(dentry)) {
 368                 char *p;
 369                 const char *dir_name;
 370                 char orig;
 371                 int ret;
 372                 ntfs_volume *vol = (*dir_ni_p)->vol;
 373
 374                 DEBUG("pre-applying DOS name `%s'",
 375                       dentry_with_dos_name->full_path_utf8);
 376                 ret = do_wim_apply_dentry_ntfs(dentry_with_dos_name,
 377                                                *dir_ni_p, w);
 378                 if (ret != 0)
 379                         return ret;
 380                 p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 381                 do {
 382                         p--;
 383                 } while (*p != '/');
 384
 385                 orig = *p;
 386                 *p = '\0';
 387                 dir_name = dentry->full_path_utf8;
 388
 389                 *dir_ni_p = ntfs_pathname_to_inode(vol, NULL, dir_name);
 390                 *p = orig;
 391                 if (!*dir_ni_p) {
 392                         ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 393                                          dir_name);
 394                         return WIMLIB_ERR_NTFS_3G;
 395                 }
 396         }
 397         return 0;
 398 }
 399
 400 /*
 401  * Applies a WIM dentry to a NTFS filesystem.
 402  *
 403  * @dentry:  The WIM dentry to apply
 404  * @dir_ni:  The NTFS inode for the parent directory
 405  * @w:       The WIMStruct for the WIM containing the image we are applying.
 406  *
 407  * @return:  0 on success; nonzero on failure.
 408  */
 409 static int do_wim_apply_dentry_ntfs(struct dentry *dentry, ntfs_inode *dir_ni,
 410                                     WIMStruct *w)
 411 {
 412         int ret = 0;
 413         mode_t type;
 414         ntfs_inode *ni = NULL;
 415         bool is_hardlink = false;
 416         ntfs_volume *vol = dir_ni->vol;
 417         struct inode *inode = dentry->inode;
 418         dentry->is_extracted = true;
 419
 420         if (inode->attributes & FILE_ATTRIBUTE_DIRECTORY) {
 421                 type = S_IFDIR;
 422         } else {
 423                 struct dentry *other;
 424
 425                 /* Apply hard-linked directory in same directory with DOS name
 426                  * (if there is one) before this dentry */
 427                 if (dentry->short_name_len == 0) {
 428                         ret = preapply_dentry_with_dos_name(dentry,
 429                                                             &dir_ni, w);
 430                         if (ret != 0)
 431                                 return ret;
 432                 }
 433
 434                 type = S_IFREG;
 435
 436                 if (inode->link_count > 1) {
 437                         /* Already extracted another dentry in the hard link
 438                          * group.  We can make a hard link instead of extracting
 439                          * the file data. */
 440                         if (inode->extracted_file) {
 441                                 ret = wim_apply_hardlink_ntfs(dentry, inode,
 442                                                               dir_ni, &ni);
 443                                 is_hardlink = true;
 444                                 if (ret)
 445                                         goto out_close_dir_ni;
 446                                 else
 447                                         goto out_set_dos_name;
 448                         }
 449                         /* Can't make a hard link; extract the file itself */
 450                         FREE(inode->extracted_file);
 451                         inode->extracted_file = STRDUP(dentry->full_path_utf8);
 452                         if (!inode->extracted_file)
 453                                 return WIMLIB_ERR_NOMEM;
 454                 }
 455         }
 456
 457         /*
 458          * Create a directory or file.
 459          *
 460          * Note: For symbolic links that are not directory junctions, pass
 461          * S_IFREG here, since we manually set the reparse data later.
 462          */
 463         ni = ntfs_create(dir_ni, 0, (ntfschar*)dentry->file_name,
 464                          dentry->file_name_len / 2, type);
 465
 466         if (!ni) {
 467                 ERROR_WITH_ERRNO("Could not create NTFS object for `%s'",
 468                                  dentry->full_path_utf8);
 469                 ret = WIMLIB_ERR_NTFS_3G;
 470                 goto out_close_dir_ni;
 471         }
 472
 473         /* Write the data streams, unless this is a directory or reparse point
 474          * */
 475         if (!(inode->attributes & (FILE_ATTRIBUTE_REPARSE_POINT |
 476                                    FILE_ATTRIBUTE_DIRECTORY))) {
 477                 ret = write_ntfs_data_streams(ni, dentry, w);
 478                 if (ret != 0)
 479                         goto out_close_dir_ni;
 480         }
 481
 482
 483         ret = apply_file_attributes_and_security_data(ni, dir_ni, dentry, w);
 484         if (ret != 0)
 485                 goto out_close_dir_ni;
 486
 487         if (inode->attributes & FILE_ATTR_REPARSE_POINT) {
 488                 ret = apply_reparse_data(ni, dentry, w);
 489                 if (ret != 0)
 490                         goto out_close_dir_ni;
 491         }
 492
 493 out_set_dos_name:
 494         /* Set DOS (short) name if given */
 495         if (dentry->short_name_len != 0) {
 496
 497                 char *short_name_utf8;
 498                 size_t short_name_utf8_len;
 499                 short_name_utf8 = utf16_to_utf8(dentry->short_name,
 500                                                 dentry->short_name_len,
 501                                                 &short_name_utf8_len);
 502                 if (!short_name_utf8) {
 503                         ERROR("Out of memory");
 504                         ret = WIMLIB_ERR_NOMEM;
 505                         goto out_close_dir_ni;
 506                 }
 507
 508                 if (is_hardlink) {
 509                         char *p;
 510                         char orig;
 511                         const char *dir_name;
 512
 513                         /* ntfs_set_ntfs_dos_name() closes the inodes in the
 514                          * wrong order if we have applied a hard link.   Close
 515                          * them ourselves, then re-open then. */
 516                         if (ntfs_inode_close(dir_ni) != 0) {
 517                                 if (ret == 0)
 518                                         ret = WIMLIB_ERR_NTFS_3G;
 519                                 ERROR_WITH_ERRNO("Failed to close directory inode");
 520                         }
 521                         if (ntfs_inode_close(ni) != 0) {
 522                                 if (ret == 0)
 523                                         ret = WIMLIB_ERR_NTFS_3G;
 524                                 ERROR_WITH_ERRNO("Failed to close hard link target inode");
 525                         }
 526                         p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 527                         do {
 528                                 p--;
 529                         } while (*p != '/');
 530
 531                         orig = *p;
 532                         *p = '\0';
 533                         dir_name = dentry->full_path_utf8;
 534
 535                         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 536                         *p = orig;
 537                         if (!dir_ni) {
 538                                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 539                                                  dir_name);
 540                                 return WIMLIB_ERR_NTFS_3G;
 541                         }
 542                         ni = ntfs_pathname_to_inode(vol, dir_ni,
 543                                                     dentry->file_name_utf8);
 544                         if (!ni) {
 545                                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 546                                                  dir_name);
 547                                 return WIMLIB_ERR_NTFS_3G;
 548                         }
 549                 }
 550
 551                 DEBUG("Setting short (DOS) name of `%s' to %s",
 552                       dentry->full_path_utf8, short_name_utf8);
 553
 554                 ret = ntfs_set_ntfs_dos_name(ni, dir_ni, short_name_utf8,
 555                                              short_name_utf8_len, 0);
 556                 FREE(short_name_utf8);
 557                 if (ret != 0) {
 558                         ERROR_WITH_ERRNO("Could not set DOS (short) name for `%s'",
 559                                          dentry->full_path_utf8);
 560                         ret = WIMLIB_ERR_NTFS_3G;
 561                 }
 562                 /* inodes have been closed by ntfs_set_ntfs_dos_name(). */
 563                 return ret;
 564         }
 565
 566 out_close_dir_ni:
 567         if (ntfs_inode_close(dir_ni) != 0) {
 568                 if (ret == 0)
 569                         ret = WIMLIB_ERR_NTFS_3G;
 570                 ERROR_WITH_ERRNO("Failed to close directory inode");
 571         }
 572         if (ni && ntfs_inode_close(ni) != 0) {
 573                 if (ret == 0)
 574                         ret = WIMLIB_ERR_NTFS_3G;
 575                 ERROR_WITH_ERRNO("Failed to close inode");
 576         }
 577         return ret;
 578 }
 579
 580 static int wim_apply_root_dentry_ntfs(const struct dentry *dentry,
 581                                       ntfs_volume *vol,
 582                                       const WIMStruct *w)
 583 {
 584         ntfs_inode *ni;
 585         int ret = 0;
 586
 587         wimlib_assert(dentry_is_directory(dentry));
 588         ni = ntfs_pathname_to_inode(vol, NULL, "/");
 589         if (!ni) {
 590                 ERROR_WITH_ERRNO("Could not find root NTFS inode");
 591                 return WIMLIB_ERR_NTFS_3G;
 592         }
 593         ret = apply_file_attributes_and_security_data(ni, ni, dentry, w);
 594         if (ntfs_inode_close(ni) != 0) {
 595                 ERROR_WITH_ERRNO("Failed to close NTFS inode for root "
 596                                  "directory");
 597                 ret = WIMLIB_ERR_NTFS_3G;
 598         }
 599         return ret;
 600 }
 601
 602 /* Applies a WIM dentry to the NTFS volume */
 603 static int wim_apply_dentry_ntfs(struct dentry *dentry, void *arg)
 604 {
 605         struct ntfs_apply_args *args = arg;
 606         ntfs_volume *vol             = args->vol;
 607         int extract_flags            = args->extract_flags;
 608         WIMStruct *w                 = args->w;
 609         ntfs_inode *dir_ni;
 610         char *p;
 611         char orig;
 612         const char *dir_name;
 613
 614         if (dentry_is_extracted(dentry))
 615                 return 0;
 616
 617         wimlib_assert(dentry->full_path_utf8);
 618
 619         DEBUG("Applying dentry `%s' to NTFS", dentry->full_path_utf8);
 620
 621         if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE)
 622                 puts(dentry->full_path_utf8);
 623
 624         if (dentry_is_root(dentry))
 625                 return wim_apply_root_dentry_ntfs(dentry, vol, w);
 626
 627         p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 628         do {
 629                 p--;
 630         } while (*p != '/');
 631
 632         orig = *p;
 633         *p = '\0';
 634         dir_name = dentry->full_path_utf8;
 635
 636         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 637         *p = orig;
 638         if (!dir_ni) {
 639                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 640                                  dir_name);
 641                 return WIMLIB_ERR_NTFS_3G;
 642         }
 643         return do_wim_apply_dentry_ntfs(dentry, dir_ni, w);
 644 }
 645
 646 static int wim_apply_dentry_timestamps(struct dentry *dentry, void *arg)
 647 {
 648         struct ntfs_apply_args *args = arg;
 649         ntfs_volume *vol             = args->vol;
 650         u8 *p;
 651         u8 buf[24];
 652         ntfs_inode *ni;
 653         int ret = 0;
 654
 655
 656         DEBUG("Setting timestamps on `%s'", dentry->full_path_utf8);
 657
 658         ni = ntfs_pathname_to_inode(vol, NULL, dentry->full_path_utf8);
 659         if (!ni) {
 660                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 661                                  dentry->full_path_utf8);
 662                 return WIMLIB_ERR_NTFS_3G;
 663         }
 664
 665         p = buf;
 666         p = put_u64(p, dentry->inode->creation_time);
 667         p = put_u64(p, dentry->inode->last_write_time);
 668         p = put_u64(p, dentry->inode->last_access_time);
 669         ret = ntfs_inode_set_times(ni, (const char*)buf, 3 * sizeof(u64), 0);
 670         if (ret != 0) {
 671                 ERROR_WITH_ERRNO("Failed to set NTFS timestamps on `%s'",
 672                                  dentry->full_path_utf8);
 673                 ret = WIMLIB_ERR_NTFS_3G;
 674         }
 675
 676         if (ntfs_inode_close(ni) != 0) {
 677                 if (ret == 0)
 678                         ret = WIMLIB_ERR_NTFS_3G;
 679                 ERROR_WITH_ERRNO("Failed to close NTFS inode for `%s'",
 680                                  dentry->full_path_utf8);
 681         }
 682         return ret;
 683 }
 684
 685 static int dentry_set_unextracted(struct dentry *dentry, void *ignore)
 686 {
 687         dentry->is_extracted = false;
 688         return 0;
 689 }
 690
 691 static int do_wim_apply_image_ntfs(WIMStruct *w, const char *device, int extract_flags)
 692 {
 693         ntfs_volume *vol;
 694         int ret;
 695         struct dentry *root;
 696         struct ntfs_apply_args args;
 697
 698         DEBUG("Mounting NTFS volume `%s'", device);
 699         vol = ntfs_mount(device, 0);
 700         if (!vol) {
 701                 ERROR_WITH_ERRNO("Failed to mount NTFS volume `%s'", device);
 702                 return WIMLIB_ERR_NTFS_3G;
 703         }
 704         args.vol = vol;
 705         args.extract_flags = extract_flags;
 706         args.w = w;
 707         root = wim_root_dentry(w);
 708
 709         for_dentry_in_tree(root, dentry_set_unextracted, NULL);
 710         ret = for_dentry_in_tree(root, wim_apply_dentry_ntfs, &args);
 711         if (ret != 0)
 712                 goto out;
 713
 714         if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE)
 715                 printf("Setting timestamps of extracted files on NTFS "
 716                        "volume `%s'\n", device);
 717         ret = for_dentry_in_tree_depth(root, wim_apply_dentry_timestamps,
 718                                        &args);
 719
 720         if (ret == 0 && (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE))
 721                 printf("Finished applying image %d of %s to NTFS "
 722                        "volume `%s'\n",
 723                        w->current_image,
 724                        w->filename ? w->filename : "WIM",
 725                        device);
 726 out:
 727         DEBUG("Unmounting NTFS volume `%s'", device);
 728         if (ntfs_umount(vol, FALSE) != 0) {
 729                 ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'", device);
 730                 if (ret == 0)
 731                         ret = WIMLIB_ERR_NTFS_3G;
 732         }
 733         return ret;
 734 }
 735
 736
 737 /*
 738  * API entry point for applying a WIM image to a NTFS volume.
 739  *
 740  * Please note that this is a NTFS *volume* and not a directory.  The intention
 741  * is that the volume contain an empty filesystem, and the WIM image contain a
 742  * full filesystem to be applied to the volume.
 743  */
 744 WIMLIBAPI int wimlib_apply_image_to_ntfs_volume(WIMStruct *w, int image,
 745                                                 const char *device, int flags,
 746                                                 WIMStruct **additional_swms,
 747                                                 unsigned num_additional_swms)
 748 {
 749         struct lookup_table *joined_tab, *w_tab_save;
 750         int ret;
 751
 752         DEBUG("w->filename = %s, image = %d, device = %s, flags = 0x%x, "
 753               "num_additional_swms = %u",
 754               w->filename, image, device, flags, num_additional_swms);
 755
 756         if (!w || !device)
 757                 return WIMLIB_ERR_INVALID_PARAM;
 758         if (image == WIM_ALL_IMAGES) {
 759                 ERROR("Can only apply a single image when applying "
 760                       "directly to a NTFS volume");
 761                 return WIMLIB_ERR_INVALID_PARAM;
 762         }
 763         if (flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) {
 764                 ERROR("Cannot specify symlink or hardlink flags when applying ");
 765                 ERROR("directly to a NTFS volume");
 766                 return WIMLIB_ERR_INVALID_PARAM;
 767         }
 768
 769         ret = verify_swm_set(w, additional_swms, num_additional_swms);
 770         if (ret != 0)
 771                 return ret;
 772
 773         if (num_additional_swms) {
 774                 ret = new_joined_lookup_table(w, additional_swms,
 775                                               num_additional_swms, &joined_tab);
 776                 if (ret != 0)
 777                         return ret;
 778                 w_tab_save = w->lookup_table;
 779                 w->lookup_table = joined_tab;
 780         }
 781
 782         ret = wimlib_select_image(w, image);
 783         if (ret != 0)
 784                 goto out;
 785
 786         ret = do_wim_apply_image_ntfs(w, device, flags);
 787
 788 out:
 789         if (num_additional_swms) {
 790                 free_lookup_table(w->lookup_table);
 791                 w->lookup_table = w_tab_save;
 792         }
 793         return ret;
 794 }
 795
 796 #else /* WITH_NTFS_3G */
 797 WIMLIBAPI int wimlib_apply_image_to_ntfs_volume(WIMStruct *w, int image,
 798                                                 const char *device, int flags,
 799                                                 WIMStruct **additional_swms,
 800                                                 unsigned num_additional_swms)
 801 {
 802         ERROR("wimlib was compiled without support for NTFS-3g, so");
 803         ERROR("we cannot apply a WIM image directly to a NTFS volume");
 804         return WIMLIB_ERR_UNSUPPORTED;
 805 }
 806 #endif /* WITH_NTFS_3G */