4 * In the WIM file format, the dentries are stored in the "metadata resource"
5 * section right after the security data. Each image in the WIM file has its
6 * own metadata resource with its own security data and dentry tree. Dentries
7 * in different images may share file resources by referring to the same lookup
12 * Copyright (C) 2012, 2013, 2014 Eric Biggers
14 * This file is part of wimlib, a library for working with WIM files.
16 * wimlib is free software; you can redistribute it and/or modify it under the
17 * terms of the GNU General Public License as published by the Free Software
18 * Foundation; either version 3 of the License, or (at your option) any later
21 * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
22 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
23 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License along with
26 * wimlib; if not, see http://www.gnu.org/licenses/.
34 #include "wimlib/case.h"
35 #include "wimlib/dentry.h"
36 #include "wimlib/encoding.h"
37 #include "wimlib/endianness.h"
38 #include "wimlib/error.h"
39 #include "wimlib/lookup_table.h"
40 #include "wimlib/metadata.h"
41 #include "wimlib/paths.h"
42 #include "wimlib/resource.h"
43 #include "wimlib/security.h"
44 #include "wimlib/sha1.h"
45 #include "wimlib/timestamp.h"
49 /* On-disk format of a WIM dentry (directory entry), located in the metadata
50 * resource for a WIM image. */
51 struct wim_dentry_on_disk {
53 /* Length of this directory entry in bytes, not including any alternate
54 * data stream entries. Should be a multiple of 8 so that the following
55 * dentry or alternate data stream entry is aligned on an 8-byte
56 * boundary. (If not, wimlib will round it up.) It must be at least as
57 * long as the fixed-length fields of the dentry (WIM_DENTRY_DISK_SIZE),
58 * plus the lengths of the file name and/or short name if present.
60 * It is also possible for this field to be 0. This situation, which is
61 * undocumented, indicates the end of a list of sibling nodes in a
62 * directory. It also means the real length is 8, because the dentry
63 * included only the length field, but that takes up 8 bytes. */
66 /* Attributes of the file or directory. This is a bitwise OR of the
67 * FILE_ATTRIBUTE_* constants and should correspond to the value
68 * retrieved by GetFileAttributes() on Windows. */
71 /* A value that specifies the security descriptor for this file or
72 * directory. If -1, the file or directory has no security descriptor.
73 * Otherwise, it is a 0-based index into the WIM image's table of
74 * security descriptors (see: `struct wim_security_data') */
77 /* Offset, in bytes, from the start of the uncompressed metadata
78 * resource of this directory's child directory entries, or 0 if this
79 * directory entry does not correspond to a directory or otherwise does
80 * not have any children. */
88 /* Creation time, last access time, and last write time, in
89 * 100-nanosecond intervals since 12:00 a.m UTC January 1, 1601. They
90 * should correspond to the times gotten by calling GetFileTime() on
93 le64 last_access_time;
96 /* Vaguely, the SHA-1 message digest ("hash") of the file's contents.
97 * More specifically, this is for the "unnamed data stream" rather than
98 * any "alternate data streams". This hash value is used to look up the
99 * corresponding entry in the WIM's stream lookup table to actually find
100 * the file contents within the WIM.
102 * If the file has no unnamed data stream (e.g. is a directory), then
103 * this field will be all zeroes. If the unnamed data stream is empty
104 * (i.e. an "empty file"), then this field is also expected to be all
105 * zeroes. (It will be if wimlib created the WIM image, at least;
106 * otherwise it can't be ruled out that the SHA-1 message digest of 0
107 * bytes of data is given explicitly.)
109 * If the file has reparse data, then this field will instead specify
110 * the SHA-1 message digest of the reparse data. If it is somehow
111 * possible for a file to have both an unnamed data stream and reparse
112 * data, then this is not handled by wimlib.
114 * As a further special case, if this field is all zeroes but there is
115 * an alternate data stream entry with no name and a nonzero SHA-1
116 * message digest field, then that hash must be used instead of this
117 * one. In fact, when named data streams are present, some versions of
118 * Windows PE contain a bug where they only look in the alternate data
119 * stream entries for the unnamed data stream, not here.
121 u8 unnamed_stream_hash[SHA1_HASH_SIZE];
123 /* The format of the following data is not yet completely known and they
124 * do not correspond to Microsoft's documentation.
126 * If this directory entry is for a reparse point (has
127 * FILE_ATTRIBUTE_REPARSE_POINT set in the attributes field), then the
128 * version of the following fields containing the reparse tag is valid.
129 * Furthermore, the field notated as not_rpfixed, as far as I can tell,
130 * is supposed to be set to 1 if reparse point fixups (a.k.a. fixing the
131 * targets of absolute symbolic links) were *not* done, and otherwise 0.
133 * If this directory entry is not for a reparse point, then the version
134 * of the following fields containing the hard_link_group_id is valid.
135 * All MS says about this field is that "If this file is part of a hard
136 * link set, all the directory entries in the set will share the same
137 * value in this field.". However, more specifically I have observed
139 * - If the file is part of a hard link set of size 1, then the
140 * hard_link_group_id should be set to either 0, which is treated
141 * specially as indicating "not hardlinked", or any unique value.
142 * - The specific nonzero values used to identity hard link sets do
143 * not matter, as long as they are unique.
144 * - However, due to bugs in Microsoft's software, it is actually NOT
145 * guaranteed that directory entries that share the same hard link
146 * group ID are actually hard linked to each either. We have to
147 * handle this by using special code to use distinguishing features
148 * (which is possible because some information about the underlying
149 * inode is repeated in each dentry) to split up these fake hard link
150 * groups into what they actually are supposed to be.
158 } _packed_attribute reparse;
161 le64 hard_link_group_id;
162 } _packed_attribute nonreparse;
165 /* Number of alternate data stream entries that directly follow this
167 le16 num_alternate_data_streams;
169 /* Length of this file's UTF-16LE encoded short name (8.3 DOS-compatible
170 * name), if present, in bytes, excluding the null terminator. If this
171 * file has no short name, then this field should be 0. */
172 le16 short_name_nbytes;
174 /* Length of this file's UTF-16LE encoded "long" name, excluding the
175 * null terminator. If this file has no short name, then this field
176 * should be 0. It's expected that only the root dentry has this field
178 le16 file_name_nbytes;
180 /* Followed by variable length file name, in UTF16-LE, if
181 * file_name_nbytes != 0. Includes null terminator. */
182 /*utf16lechar file_name[];*/
184 /* Followed by variable length short name, in UTF16-LE, if
185 * short_name_nbytes != 0. Includes null terminator. */
186 /*utf16lechar short_name[];*/
189 /* Calculates the unaligned length, in bytes, of an on-disk WIM dentry that has
190 * a file name and short name that take the specified numbers of bytes. This
191 * excludes any alternate data stream entries that may follow the dentry. */
193 dentry_correct_length_unaligned(u16 file_name_nbytes, u16 short_name_nbytes)
195 u64 length = sizeof(struct wim_dentry_on_disk);
196 if (file_name_nbytes)
197 length += file_name_nbytes + 2;
198 if (short_name_nbytes)
199 length += short_name_nbytes + 2;
203 /* Calculates the unaligned length, in bytes, of an on-disk WIM dentry, based on
204 * the file name length and short name length. Note that dentry->length is
205 * ignored; also, this excludes any alternate data stream entries that may
206 * follow the dentry. */
208 dentry_correct_length_aligned(const struct wim_dentry *dentry)
212 len = dentry_correct_length_unaligned(dentry->file_name_nbytes,
213 dentry->short_name_nbytes);
214 return (len + 7) & ~7;
218 dentry_clear_short_name(struct wim_dentry *dentry)
220 if (dentry_has_short_name(dentry)) {
221 FREE(dentry->short_name);
222 dentry->short_name = NULL;
223 dentry->short_name_nbytes = 0;
228 /* Sets the name of a WIM dentry from a multibyte string.
229 * Only use this on dentries not inserted into the tree. Use rename_wim_path()
230 * to do a real rename. */
232 dentry_set_name(struct wim_dentry *dentry, const tchar *new_name)
236 ret = get_utf16le_string(new_name, &dentry->file_name,
237 &dentry->file_name_nbytes);
241 return dentry_clear_short_name(dentry);
244 /* Sets the name of a WIM dentry from a UTF-16LE string.
245 * Only use this on dentries not inserted into the tree. Use rename_wim_path()
246 * to do a real rename. */
248 dentry_set_name_utf16le(struct wim_dentry *dentry, const utf16lechar *new_name)
250 utf16lechar *name = NULL;
251 size_t name_nbytes = 0;
253 if (new_name && *new_name) {
254 const utf16lechar *tmp;
258 name_nbytes += sizeof(utf16lechar);
261 name = memdup(new_name, name_nbytes + sizeof(utf16lechar));
263 return WIMLIB_ERR_NOMEM;
266 FREE(dentry->file_name);
267 dentry->file_name = name;
268 dentry->file_name_nbytes = name_nbytes;
270 return dentry_clear_short_name(dentry);
273 /* Returns the total length of a WIM alternate data stream entry on-disk,
274 * including the stream name, the null terminator, AND the padding after the
275 * entry to align the next ADS entry or dentry on an 8-byte boundary. */
277 ads_entry_total_length(const struct wim_ads_entry *entry)
279 u64 len = sizeof(struct wim_ads_entry_on_disk);
280 if (entry->stream_name_nbytes)
281 len += entry->stream_name_nbytes + 2;
282 return (len + 7) & ~7;
286 * Determine whether to include a "dummy" stream when writing a WIM dentry:
288 * Some versions of Microsoft's WIM software (the boot driver(s) in WinPE 3.0,
289 * for example) contain a bug where they assume the first alternate data stream
290 * (ADS) entry of a dentry with a nonzero ADS count specifies the unnamed
291 * stream, even if it has a name and the unnamed stream is already specified in
292 * the hash field of the dentry itself.
294 * wimlib has to work around this behavior by carefully emulating the behavior
295 * of (most versions of) ImageX/WIMGAPI, which move the unnamed stream reference
296 * into the alternate stream entries whenever there are named data streams, even
297 * though there is already a field in the dentry itself for the unnamed stream
298 * reference, which then goes to waste.
301 inode_needs_dummy_stream(const struct wim_inode *inode)
303 return (inode->i_num_ads > 0 &&
304 inode->i_num_ads < 0xffff && /* overflow check */
305 inode->i_canonical_streams); /* assume the dentry is okay if it
306 already had an unnamed ADS entry
307 when it was read in */
310 /* Calculate the total number of bytes that will be consumed when a WIM dentry
311 * is written. This includes base dentry and name fields as well as all
312 * alternate data stream entries and alignment bytes. */
314 dentry_out_total_length(const struct wim_dentry *dentry)
316 u64 length = dentry_correct_length_aligned(dentry);
317 const struct wim_inode *inode = dentry->d_inode;
319 if (inode_needs_dummy_stream(inode))
320 length += ads_entry_total_length(&(struct wim_ads_entry){});
322 for (u16 i = 0; i < inode->i_num_ads; i++)
323 length += ads_entry_total_length(&inode->i_ads_entries[i]);
328 /* Calculate the aligned, total length of a dentry, including all alternate data
329 * stream entries. Uses dentry->length. */
331 dentry_in_total_length(const struct wim_dentry *dentry)
333 u64 length = dentry->length;
334 const struct wim_inode *inode = dentry->d_inode;
335 for (u16 i = 0; i < inode->i_num_ads; i++)
336 length += ads_entry_total_length(&inode->i_ads_entries[i]);
337 return (length + 7) & ~7;
341 do_for_dentry_in_tree(struct wim_dentry *dentry,
342 int (*visitor)(struct wim_dentry *, void *), void *arg)
345 struct wim_dentry *child;
347 ret = (*visitor)(dentry, arg);
351 for_dentry_child(child, dentry) {
352 ret = do_for_dentry_in_tree(child, visitor, arg);
361 do_for_dentry_in_tree_depth(struct wim_dentry *dentry,
362 int (*visitor)(struct wim_dentry *, void *), void *arg)
365 struct wim_dentry *child;
367 for_dentry_child_postorder(child, dentry) {
368 ret = do_for_dentry_in_tree_depth(child, visitor, arg);
372 return unlikely((*visitor)(dentry, arg));
375 /* Calls a function on all directory entries in a WIM dentry tree. Logically,
376 * this is a pre-order traversal (the function is called on a parent dentry
377 * before its children), but sibling dentries will be visited in order as well.
380 for_dentry_in_tree(struct wim_dentry *root,
381 int (*visitor)(struct wim_dentry *, void *), void *arg)
385 return do_for_dentry_in_tree(root, visitor, arg);
388 /* Like for_dentry_in_tree(), but the visitor function is always called on a
389 * dentry's children before on itself. */
391 for_dentry_in_tree_depth(struct wim_dentry *root,
392 int (*visitor)(struct wim_dentry *, void *), void *arg)
396 return do_for_dentry_in_tree_depth(root, visitor, arg);
399 /* Calculate the full path of @dentry. */
401 calculate_dentry_full_path(struct wim_dentry *dentry)
404 u32 full_path_nbytes;
407 if (dentry->_full_path)
410 if (dentry_is_root(dentry)) {
411 static const tchar _root_path[] = {WIM_PATH_SEPARATOR, T('\0')};
412 full_path = TSTRDUP(_root_path);
413 if (full_path == NULL)
414 return WIMLIB_ERR_NOMEM;
415 full_path_nbytes = 1 * sizeof(tchar);
417 struct wim_dentry *parent;
418 tchar *parent_full_path;
419 u32 parent_full_path_nbytes;
420 size_t filename_nbytes;
422 parent = dentry->parent;
423 if (dentry_is_root(parent)) {
424 parent_full_path = T("");
425 parent_full_path_nbytes = 0;
427 if (parent->_full_path == NULL) {
428 ret = calculate_dentry_full_path(parent);
432 parent_full_path = parent->_full_path;
433 parent_full_path_nbytes = parent->full_path_nbytes;
436 /* Append this dentry's name as a tchar string to the full path
437 * of the parent followed by the path separator */
439 filename_nbytes = dentry->file_name_nbytes;
442 int ret = utf16le_to_tstr_nbytes(dentry->file_name,
443 dentry->file_name_nbytes,
450 full_path_nbytes = parent_full_path_nbytes + sizeof(tchar) +
452 full_path = MALLOC(full_path_nbytes + sizeof(tchar));
453 if (full_path == NULL)
454 return WIMLIB_ERR_NOMEM;
455 memcpy(full_path, parent_full_path, parent_full_path_nbytes);
456 full_path[parent_full_path_nbytes / sizeof(tchar)] = WIM_PATH_SEPARATOR;
458 memcpy(&full_path[parent_full_path_nbytes / sizeof(tchar) + 1],
460 filename_nbytes + sizeof(tchar));
462 utf16le_to_tstr_buf(dentry->file_name,
463 dentry->file_name_nbytes,
464 &full_path[parent_full_path_nbytes /
468 dentry->_full_path = full_path;
469 dentry->full_path_nbytes= full_path_nbytes;
474 dentry_full_path(struct wim_dentry *dentry)
476 calculate_dentry_full_path(dentry);
477 return dentry->_full_path;
481 dentry_calculate_subdir_offset(struct wim_dentry *dentry, void *_subdir_offset_p)
484 if (dentry_is_directory(dentry)) {
485 u64 *subdir_offset_p = _subdir_offset_p;
486 struct wim_dentry *child;
488 /* Set offset of directory's child dentries */
489 dentry->subdir_offset = *subdir_offset_p;
491 /* Account for child dentries */
492 for_dentry_child(child, dentry)
493 *subdir_offset_p += dentry_out_total_length(child);
495 /* Account for end-of-directory entry */
496 *subdir_offset_p += 8;
498 /* Not a directory; set subdir_offset to 0 */
499 dentry->subdir_offset = 0;
505 * Calculates the subdir offsets for a directory tree.
508 calculate_subdir_offsets(struct wim_dentry *root, u64 *subdir_offset_p)
510 for_dentry_in_tree(root, dentry_calculate_subdir_offset, subdir_offset_p);
513 /* Compare the UTF-16LE long filenames of two dentries case insensitively. */
515 dentry_compare_names_case_insensitive(const struct wim_dentry *d1,
516 const struct wim_dentry *d2)
518 return cmp_utf16le_strings(d1->file_name,
519 d1->file_name_nbytes / 2,
521 d2->file_name_nbytes / 2,
525 /* Compare the UTF-16LE long filenames of two dentries case sensitively. */
527 dentry_compare_names_case_sensitive(const struct wim_dentry *d1,
528 const struct wim_dentry *d2)
530 return cmp_utf16le_strings(d1->file_name,
531 d1->file_name_nbytes / 2,
533 d2->file_name_nbytes / 2,
538 _avl_dentry_compare_names_ci(const struct avl_tree_node *n1,
539 const struct avl_tree_node *n2)
541 const struct wim_dentry *d1, *d2;
543 d1 = avl_tree_entry(n1, struct wim_dentry, d_index_node_ci);
544 d2 = avl_tree_entry(n2, struct wim_dentry, d_index_node_ci);
545 return dentry_compare_names_case_insensitive(d1, d2);
549 _avl_dentry_compare_names(const struct avl_tree_node *n1,
550 const struct avl_tree_node *n2)
552 const struct wim_dentry *d1, *d2;
554 d1 = avl_tree_entry(n1, struct wim_dentry, d_index_node);
555 d2 = avl_tree_entry(n2, struct wim_dentry, d_index_node);
556 return dentry_compare_names_case_sensitive(d1, d2);
559 /* Default case sensitivity behavior for searches with
560 * WIMLIB_CASE_PLATFORM_DEFAULT specified. This can be modified by
561 * wimlib_global_init(). */
562 bool default_ignore_case =
570 /* Case-sensitive dentry lookup. Only @file_name and @file_name_nbytes of
571 * @dummy must be valid. */
572 static struct wim_dentry *
573 dir_lookup(const struct wim_inode *dir, const struct wim_dentry *dummy)
575 struct avl_tree_node *node;
577 node = avl_tree_lookup_node(dir->i_children,
578 &dummy->d_index_node,
579 _avl_dentry_compare_names);
582 return avl_tree_entry(node, struct wim_dentry, d_index_node);
585 /* Case-insensitive dentry lookup. Only @file_name and @file_name_nbytes of
586 * @dummy must be valid. */
587 static struct wim_dentry *
588 dir_lookup_ci(const struct wim_inode *dir, const struct wim_dentry *dummy)
590 struct avl_tree_node *node;
592 node = avl_tree_lookup_node(dir->i_children_ci,
593 &dummy->d_index_node_ci,
594 _avl_dentry_compare_names_ci);
597 return avl_tree_entry(node, struct wim_dentry, d_index_node_ci);
600 /* Given a UTF-16LE filename and a directory, look up the dentry for the file.
601 * Return it if found, otherwise NULL. This is case-sensitive on UNIX and
602 * case-insensitive on Windows. */
604 get_dentry_child_with_utf16le_name(const struct wim_dentry *dentry,
605 const utf16lechar *name,
607 CASE_SENSITIVITY_TYPE case_ctype)
609 const struct wim_inode *dir = dentry->d_inode;
610 bool ignore_case = will_ignore_case(case_ctype);
611 struct wim_dentry dummy;
612 struct wim_dentry *child;
614 dummy.file_name = (utf16lechar*)name;
615 dummy.file_name_nbytes = name_nbytes;
618 /* Case-sensitive lookup. */
619 return dir_lookup(dir, &dummy);
621 /* Case-insensitive lookup. */
623 child = dir_lookup_ci(dir, &dummy);
627 if (likely(list_empty(&child->d_ci_conflict_list)))
628 /* Only one dentry has this case-insensitive name; return it */
631 /* Multiple dentries have the same case-insensitive name. Choose the
632 * dentry with the same case-sensitive name, if one exists; otherwise
633 * print a warning and choose one of the possible dentries arbitrarily.
635 struct wim_dentry *alt = child;
640 if (!dentry_compare_names_case_sensitive(&dummy, alt))
642 alt = list_entry(alt->d_ci_conflict_list.next,
643 struct wim_dentry, d_ci_conflict_list);
644 } while (alt != child);
646 WARNING("Result of case-insensitive lookup is ambiguous\n"
647 " (returning \"%"TS"\" of %zu "
648 "possible files, including \"%"TS"\")",
649 dentry_full_path(child),
651 dentry_full_path(list_entry(child->d_ci_conflict_list.next,
653 d_ci_conflict_list)));
657 /* Returns the child of @dentry that has the file name @name. Returns NULL if
658 * no child has the name. */
660 get_dentry_child_with_name(const struct wim_dentry *dentry, const tchar *name,
661 CASE_SENSITIVITY_TYPE case_type)
664 return get_dentry_child_with_utf16le_name(dentry, name,
665 tstrlen(name) * sizeof(tchar),
668 utf16lechar *utf16le_name;
669 size_t utf16le_name_nbytes;
671 struct wim_dentry *child;
673 ret = tstr_to_utf16le(name, tstrlen(name) * sizeof(tchar),
674 &utf16le_name, &utf16le_name_nbytes);
678 child = get_dentry_child_with_utf16le_name(dentry,
688 static struct wim_dentry *
689 get_dentry_utf16le(WIMStruct *wim, const utf16lechar *path,
690 CASE_SENSITIVITY_TYPE case_type)
692 struct wim_dentry *cur_dentry;
693 const utf16lechar *name_start, *name_end;
695 /* Start with the root directory of the image. Note: this will be NULL
696 * if an image has been added directly with wimlib_add_empty_image() but
697 * no files have been added yet; in that case we fail with ENOENT. */
698 cur_dentry = wim_root_dentry(wim);
702 if (cur_dentry == NULL) {
707 if (*name_start && !dentry_is_directory(cur_dentry)) {
712 while (*name_start == cpu_to_le16(WIM_PATH_SEPARATOR))
718 name_end = name_start;
721 } while (*name_end != cpu_to_le16(WIM_PATH_SEPARATOR) && *name_end);
723 cur_dentry = get_dentry_child_with_utf16le_name(cur_dentry,
725 (u8*)name_end - (u8*)name_start,
727 name_start = name_end;
732 * WIM path lookup: translate a path in the currently selected WIM image to the
733 * corresponding dentry, if it exists.
736 * The WIMStruct for the WIM. The search takes place in the currently
740 * The path to look up, given relative to the root of the WIM image.
741 * Characters with value WIM_PATH_SEPARATOR are taken to be path
742 * separators. Leading path separators are ignored, whereas one or more
743 * trailing path separators cause the path to only match a directory.
746 * The case-sensitivity behavior of this function, as one of the following
749 * - WIMLIB_CASE_SENSITIVE: Perform the search case sensitively. This means
750 * that names must match exactly.
752 * - WIMLIB_CASE_INSENSITIVE: Perform the search case insensitively. This
753 * means that names are considered to match if they are equal when
754 * transformed to upper case. If a path component matches multiple names
755 * case-insensitively, the name that matches the path component
756 * case-sensitively is chosen, if existent; otherwise one
757 * case-insensitively matching name is chosen arbitrarily.
759 * - WIMLIB_CASE_PLATFORM_DEFAULT: Perform either case-sensitive or
760 * case-insensitive search, depending on the value of the global variable
761 * default_ignore_case.
763 * In any case, no Unicode normalization is done before comparing strings.
765 * Returns a pointer to the dentry that is the result of the lookup, or NULL if
766 * no such dentry exists. If NULL is returned, errno is set to one of the
769 * ENOTDIR if one of the path components used as a directory existed but
770 * was not, in fact, a directory.
776 * - This function does not consider a reparse point to be a directory, even
777 * if it has FILE_ATTRIBUTE_DIRECTORY set.
779 * - This function does not dereference symbolic links or junction points
780 * when performing the search.
782 * - Since this function ignores leading slashes, the empty path is valid and
783 * names the root directory of the WIM image.
785 * - An image added with wimlib_add_empty_image() does not have a root
786 * directory yet, and this function will fail with ENOENT for any path on
790 get_dentry(WIMStruct *wim, const tchar *path, CASE_SENSITIVITY_TYPE case_type)
793 return get_dentry_utf16le(wim, path, case_type);
795 utf16lechar *path_utf16le;
796 size_t path_utf16le_nbytes;
798 struct wim_dentry *dentry;
800 ret = tstr_to_utf16le(path, tstrlen(path) * sizeof(tchar),
801 &path_utf16le, &path_utf16le_nbytes);
804 dentry = get_dentry_utf16le(wim, path_utf16le, case_type);
810 /* Takes in a path of length @len in @buf, and transforms it into a string for
811 * the path of its parent directory. */
813 to_parent_name(tchar *buf, size_t len)
815 ssize_t i = (ssize_t)len - 1;
816 while (i >= 0 && buf[i] == WIM_PATH_SEPARATOR)
818 while (i >= 0 && buf[i] != WIM_PATH_SEPARATOR)
820 while (i >= 0 && buf[i] == WIM_PATH_SEPARATOR)
822 buf[i + 1] = T('\0');
825 /* Similar to get_dentry(), but returns the dentry named by @path with the last
826 * component stripped off.
828 * Note: The returned dentry is NOT guaranteed to be a directory. */
830 get_parent_dentry(WIMStruct *wim, const tchar *path,
831 CASE_SENSITIVITY_TYPE case_type)
833 size_t path_len = tstrlen(path);
834 tchar buf[path_len + 1];
836 tmemcpy(buf, path, path_len + 1);
837 to_parent_name(buf, path_len);
838 return get_dentry(wim, buf, case_type);
842 /* Finds the dentry, lookup table entry, and stream index for a WIM file stream,
845 * Currently, lookups of this type are only needed if FUSE is enabled. */
847 wim_pathname_to_stream(WIMStruct *wim,
850 struct wim_dentry **dentry_ret,
851 struct wim_lookup_table_entry **lte_ret,
854 struct wim_dentry *dentry;
855 struct wim_lookup_table_entry *lte;
857 const tchar *stream_name = NULL;
858 struct wim_inode *inode;
861 if (lookup_flags & LOOKUP_FLAG_ADS_OK) {
862 stream_name = path_stream_name(path);
864 p = (tchar*)stream_name - 1;
869 dentry = get_dentry(wim, path, WIMLIB_CASE_SENSITIVE);
875 inode = dentry->d_inode;
877 if (!inode->i_resolved)
878 if (inode_resolve_streams(inode, wim->lookup_table, false))
881 if (!(lookup_flags & LOOKUP_FLAG_DIRECTORY_OK)
882 && inode_is_directory(inode))
886 struct wim_ads_entry *ads_entry;
888 ads_entry = inode_get_ads_entry(inode, stream_name,
891 stream_idx = ads_idx + 1;
892 lte = ads_entry->lte;
897 lte = inode_unnamed_stream_resolved(inode, &stream_idx);
900 *dentry_ret = dentry;
904 *stream_idx_ret = stream_idx;
907 #endif /* WITH_FUSE */
909 /* Creates an unlinked directory entry. */
911 new_dentry(const tchar *name, struct wim_dentry **dentry_ret)
913 struct wim_dentry *dentry;
916 dentry = CALLOC(1, sizeof(struct wim_dentry));
918 return WIMLIB_ERR_NOMEM;
921 ret = dentry_set_name(dentry, name);
924 ERROR("Failed to set name on new dentry with name \"%"TS"\"",
929 dentry->parent = dentry;
930 *dentry_ret = dentry;
935 _new_dentry_with_inode(const tchar *name, struct wim_dentry **dentry_ret,
938 struct wim_dentry *dentry;
941 ret = new_dentry(name, &dentry);
946 dentry->d_inode = new_timeless_inode();
948 dentry->d_inode = new_inode();
949 if (dentry->d_inode == NULL) {
951 return WIMLIB_ERR_NOMEM;
954 inode_add_dentry(dentry, dentry->d_inode);
955 *dentry_ret = dentry;
960 new_dentry_with_timeless_inode(const tchar *name, struct wim_dentry **dentry_ret)
962 return _new_dentry_with_inode(name, dentry_ret, true);
966 new_dentry_with_inode(const tchar *name, struct wim_dentry **dentry_ret)
968 return _new_dentry_with_inode(name, dentry_ret, false);
972 new_filler_directory(struct wim_dentry **dentry_ret)
975 struct wim_dentry *dentry;
977 ret = new_dentry_with_inode(T(""), &dentry);
980 /* Leave the inode number as 0; this is allowed for non
981 * hard-linked files. */
982 dentry->d_inode->i_resolved = 1;
983 dentry->d_inode->i_attributes = FILE_ATTRIBUTE_DIRECTORY;
984 *dentry_ret = dentry;
989 dentry_clear_inode_visited(struct wim_dentry *dentry, void *_ignore)
991 dentry->d_inode->i_visited = 0;
996 dentry_tree_clear_inode_visited(struct wim_dentry *root)
998 for_dentry_in_tree(root, dentry_clear_inode_visited, NULL);
1002 * Free a WIM dentry.
1004 * In addition to freeing the dentry itself, this decrements the link count of
1005 * the corresponding inode (if any). If the inode's link count reaches 0, the
1006 * inode is freed as well.
1009 free_dentry(struct wim_dentry *dentry)
1012 FREE(dentry->file_name);
1013 FREE(dentry->short_name);
1014 FREE(dentry->_full_path);
1015 if (dentry->d_inode)
1016 put_inode(dentry->d_inode);
1022 do_free_dentry(struct wim_dentry *dentry, void *_ignore)
1024 free_dentry(dentry);
1029 do_free_dentry_and_unref_streams(struct wim_dentry *dentry, void *lookup_table)
1031 inode_unref_streams(dentry->d_inode, lookup_table);
1032 free_dentry(dentry);
1037 * Recursively frees all directory entries in the specified tree.
1040 * The root of the tree.
1043 * The lookup table for dentries. If non-NULL, the reference counts in the
1044 * lookup table for the lookup table entries corresponding to the dentries
1045 * will be decremented.
1047 * This also puts references to the corresponding inodes.
1049 * This does *not* unlink @root from its parent directory (if it has one).
1052 free_dentry_tree(struct wim_dentry *root, struct wim_lookup_table *lookup_table)
1054 int (*f)(struct wim_dentry *, void *);
1057 f = do_free_dentry_and_unref_streams;
1061 for_dentry_in_tree_depth(root, f, lookup_table);
1064 /* Insert the @child dentry into the case sensitive index of the @dir directory.
1065 * Return NULL if successfully inserted, otherwise a pointer to the
1066 * already-inserted duplicate. */
1067 static struct wim_dentry *
1068 dir_index_child(struct wim_inode *dir, struct wim_dentry *child)
1070 struct avl_tree_node *duplicate;
1072 duplicate = avl_tree_insert(&dir->i_children,
1073 &child->d_index_node,
1074 _avl_dentry_compare_names);
1077 return avl_tree_entry(duplicate, struct wim_dentry, d_index_node);
1080 /* Insert the @child dentry into the case insensitive index of the @dir
1081 * directory. Return NULL if successfully inserted, otherwise a pointer to the
1082 * already-inserted duplicate. */
1083 static struct wim_dentry *
1084 dir_index_child_ci(struct wim_inode *dir, struct wim_dentry *child)
1086 struct avl_tree_node *duplicate;
1088 duplicate = avl_tree_insert(&dir->i_children_ci,
1089 &child->d_index_node_ci,
1090 _avl_dentry_compare_names_ci);
1093 return avl_tree_entry(duplicate, struct wim_dentry, d_index_node_ci);
1096 /* Removes the specified dentry from its directory's case-sensitive index. */
1098 dir_unindex_child(struct wim_inode *dir, struct wim_dentry *child)
1100 avl_tree_remove(&dir->i_children, &child->d_index_node);
1103 /* Removes the specified dentry from its directory's case-insensitive index. */
1105 dir_unindex_child_ci(struct wim_inode *dir, struct wim_dentry *child)
1107 avl_tree_remove(&dir->i_children_ci, &child->d_index_node_ci);
1110 /* Returns true iff the specified dentry is in its parent directory's
1111 * case-insensitive index. */
1113 dentry_in_ci_index(const struct wim_dentry *dentry)
1115 return !avl_tree_node_is_unlinked(&dentry->d_index_node_ci);
1119 * Links a dentry into the directory tree.
1121 * @parent: The dentry that will be the parent of @child.
1122 * @child: The dentry to link.
1124 * Returns NULL if successful. If @parent already contains a dentry with the
1125 * same case-sensitive name as @child, returns a pointer to this duplicate
1129 dentry_add_child(struct wim_dentry *parent, struct wim_dentry *child)
1131 struct wim_dentry *duplicate;
1132 struct wim_inode *dir;
1134 wimlib_assert(parent != child);
1136 dir = parent->d_inode;
1138 wimlib_assert(inode_is_directory(dir));
1140 duplicate = dir_index_child(dir, child);
1144 duplicate = dir_index_child_ci(dir, child);
1146 list_add(&child->d_ci_conflict_list, &duplicate->d_ci_conflict_list);
1147 avl_tree_node_set_unlinked(&child->d_index_node_ci);
1149 INIT_LIST_HEAD(&child->d_ci_conflict_list);
1151 child->parent = parent;
1155 /* Unlink a WIM dentry from the directory entry tree. */
1157 unlink_dentry(struct wim_dentry *dentry)
1159 struct wim_inode *dir;
1161 if (dentry_is_root(dentry))
1164 dir = dentry->parent->d_inode;
1166 dir_unindex_child(dir, dentry);
1168 if (dentry_in_ci_index(dentry)) {
1170 dir_unindex_child_ci(dir, dentry);
1172 if (!list_empty(&dentry->d_ci_conflict_list)) {
1173 /* Make a different case-insensitively-the-same dentry
1174 * be the "representative" in the search index. */
1175 struct list_head *next;
1176 struct wim_dentry *other;
1177 struct wim_dentry *existing;
1179 next = dentry->d_ci_conflict_list.next;
1180 other = list_entry(next, struct wim_dentry, d_ci_conflict_list);
1181 existing = dir_index_child_ci(dir, other);
1182 wimlib_assert(existing == NULL);
1185 list_del(&dentry->d_ci_conflict_list);
1188 /* Reads a WIM directory entry, including all alternate data stream entries that
1189 * follow it, from the WIM image's metadata resource. */
1191 read_dentry(const u8 * restrict buf, size_t buf_len,
1192 u64 offset, struct wim_dentry **dentry_ret)
1196 const struct wim_dentry_on_disk *disk_dentry;
1197 struct wim_dentry *dentry;
1198 struct wim_inode *inode;
1199 u16 short_name_nbytes;
1200 u16 file_name_nbytes;
1201 u64 calculated_size;
1204 BUILD_BUG_ON(sizeof(struct wim_dentry_on_disk) != WIM_DENTRY_DISK_SIZE);
1206 /* Before reading the whole dentry, we need to read just the length.
1207 * This is because a dentry of length 8 (that is, just the length field)
1208 * terminates the list of sibling directory entries. */
1210 /* Check for buffer overrun. */
1211 if (unlikely(offset + sizeof(u64) > buf_len ||
1212 offset + sizeof(u64) < offset))
1214 ERROR("Directory entry starting at %"PRIu64" ends past the "
1215 "end of the metadata resource (size %zu)",
1217 return WIMLIB_ERR_INVALID_METADATA_RESOURCE;
1220 /* Get pointer to the dentry data. */
1222 disk_dentry = (const struct wim_dentry_on_disk*)p;
1224 /* Get dentry length. */
1225 length = le64_to_cpu(disk_dentry->length);
1227 /* Check for end-of-directory. */
1233 /* Validate dentry length. */
1234 if (unlikely(length < sizeof(struct wim_dentry_on_disk))) {
1235 ERROR("Directory entry has invalid length of %"PRIu64" bytes",
1237 return WIMLIB_ERR_INVALID_METADATA_RESOURCE;
1240 /* Check for buffer overrun. */
1241 if (unlikely(offset + length > buf_len ||
1242 offset + length < offset))
1244 ERROR("Directory entry at offset %"PRIu64" and with size "
1245 "%"PRIu64" ends past the end of the metadata resource "
1246 "(size %zu)", offset, length, buf_len);
1247 return WIMLIB_ERR_INVALID_METADATA_RESOURCE;
1250 /* Allocate new dentry structure, along with a preliminary inode. */
1251 ret = new_dentry_with_timeless_inode(T(""), &dentry);
1255 dentry->length = length;
1256 inode = dentry->d_inode;
1258 /* Read more fields: some into the dentry, and some into the inode. */
1259 inode->i_attributes = le32_to_cpu(disk_dentry->attributes);
1260 inode->i_security_id = le32_to_cpu(disk_dentry->security_id);
1261 dentry->subdir_offset = le64_to_cpu(disk_dentry->subdir_offset);
1262 inode->i_creation_time = le64_to_cpu(disk_dentry->creation_time);
1263 inode->i_last_access_time = le64_to_cpu(disk_dentry->last_access_time);
1264 inode->i_last_write_time = le64_to_cpu(disk_dentry->last_write_time);
1265 copy_hash(inode->i_hash, disk_dentry->unnamed_stream_hash);
1267 /* I don't know what's going on here. It seems like M$ screwed up the
1268 * reparse points, then put the fields in the same place and didn't
1269 * document it. So we have some fields we read for reparse points, and
1270 * some fields in the same place for non-reparse-points. */
1271 if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
1272 inode->i_rp_unknown_1 = le32_to_cpu(disk_dentry->reparse.rp_unknown_1);
1273 inode->i_reparse_tag = le32_to_cpu(disk_dentry->reparse.reparse_tag);
1274 inode->i_rp_unknown_2 = le16_to_cpu(disk_dentry->reparse.rp_unknown_2);
1275 inode->i_not_rpfixed = le16_to_cpu(disk_dentry->reparse.not_rpfixed);
1276 /* Leave inode->i_ino at 0. Note that this means the WIM file
1277 * cannot archive hard-linked reparse points. Such a thing
1278 * doesn't really make sense anyway, although I believe it's
1279 * theoretically possible to have them on NTFS. */
1281 inode->i_rp_unknown_1 = le32_to_cpu(disk_dentry->nonreparse.rp_unknown_1);
1282 inode->i_ino = le64_to_cpu(disk_dentry->nonreparse.hard_link_group_id);
1284 inode->i_num_ads = le16_to_cpu(disk_dentry->num_alternate_data_streams);
1286 /* Now onto reading the names. There are two of them: the (long) file
1287 * name, and the short name. */
1289 short_name_nbytes = le16_to_cpu(disk_dentry->short_name_nbytes);
1290 file_name_nbytes = le16_to_cpu(disk_dentry->file_name_nbytes);
1292 if (unlikely((short_name_nbytes & 1) | (file_name_nbytes & 1))) {
1293 ERROR("Dentry name is not valid UTF-16 (odd number of bytes)!");
1294 ret = WIMLIB_ERR_INVALID_METADATA_RESOURCE;
1295 goto err_free_dentry;
1298 /* We now know the length of the file name and short name. Make sure
1299 * the length of the dentry is large enough to actually hold them.
1301 * The calculated length here is unaligned to allow for the possibility
1302 * that the dentry->length names an unaligned length, although this
1303 * would be unexpected. */
1304 calculated_size = dentry_correct_length_unaligned(file_name_nbytes,
1307 if (unlikely(dentry->length < calculated_size)) {
1308 ERROR("Unexpected end of directory entry! (Expected "
1309 "at least %"PRIu64" bytes, got %"PRIu64" bytes.)",
1310 calculated_size, dentry->length);
1311 ret = WIMLIB_ERR_INVALID_METADATA_RESOURCE;
1312 goto err_free_dentry;
1315 /* Advance p to point past the base dentry, to the first name. */
1316 p += sizeof(struct wim_dentry_on_disk);
1318 /* Read the filename if present. Note: if the filename is empty, there
1319 * is no null terminator following it. */
1320 if (file_name_nbytes) {
1321 dentry->file_name = MALLOC(file_name_nbytes + 2);
1322 if (dentry->file_name == NULL) {
1323 ret = WIMLIB_ERR_NOMEM;
1324 goto err_free_dentry;
1326 dentry->file_name_nbytes = file_name_nbytes;
1327 memcpy(dentry->file_name, p, file_name_nbytes);
1328 p += file_name_nbytes + 2;
1329 dentry->file_name[file_name_nbytes / 2] = cpu_to_le16(0);
1332 /* Read the short filename if present. Note: if there is no short
1333 * filename, there is no null terminator following it. */
1334 if (short_name_nbytes) {
1335 dentry->short_name = MALLOC(short_name_nbytes + 2);
1336 if (dentry->short_name == NULL) {
1337 ret = WIMLIB_ERR_NOMEM;
1338 goto err_free_dentry;
1340 dentry->short_name_nbytes = short_name_nbytes;
1341 memcpy(dentry->short_name, p, short_name_nbytes);
1342 p += short_name_nbytes + 2;
1343 dentry->short_name[short_name_nbytes / 2] = cpu_to_le16(0);
1346 /* Align the dentry length. */
1347 dentry->length = (dentry->length + 7) & ~7;
1349 /* Read the alternate data streams, if present. inode->i_num_ads tells
1350 * us how many they are, and they will directly follow the dentry in the
1351 * metadata resource buffer.
1353 * Note that each alternate data stream entry begins on an 8-byte
1354 * aligned boundary, and the alternate data stream entries seem to NOT
1355 * be included in the dentry->length field for some reason. */
1356 if (unlikely(inode->i_num_ads != 0)) {
1357 ret = WIMLIB_ERR_INVALID_METADATA_RESOURCE;
1358 if (offset + dentry->length > buf_len ||
1359 (ret = read_ads_entries(&buf[offset + dentry->length],
1361 buf_len - offset - dentry->length)))
1363 ERROR("Failed to read alternate data stream "
1364 "entries of WIM dentry \"%"WS"\"",
1366 goto err_free_dentry;
1370 *dentry_ret = dentry;
1374 free_dentry(dentry);
1379 dentry_is_dot_or_dotdot(const struct wim_dentry *dentry)
1381 if (dentry->file_name_nbytes <= 4) {
1382 if (dentry->file_name_nbytes == 4) {
1383 if (dentry->file_name[0] == cpu_to_le16('.') &&
1384 dentry->file_name[1] == cpu_to_le16('.'))
1386 } else if (dentry->file_name_nbytes == 2) {
1387 if (dentry->file_name[0] == cpu_to_le16('.'))
1395 read_dentry_tree_recursive(const u8 * restrict buf, size_t buf_len,
1396 struct wim_dentry * restrict dir)
1398 u64 cur_offset = dir->subdir_offset;
1400 /* Check for cyclic directory structure, which would cause infinite
1401 * recursion if not handled. */
1402 for (struct wim_dentry *d = dir->parent;
1403 !dentry_is_root(d); d = d->parent)
1405 if (unlikely(d->subdir_offset == cur_offset)) {
1406 ERROR("Cyclic directory structure detected: children "
1407 "of \"%"TS"\" coincide with children of \"%"TS"\"",
1408 dentry_full_path(dir), dentry_full_path(d));
1409 return WIMLIB_ERR_INVALID_METADATA_RESOURCE;
1414 struct wim_dentry *child;
1415 struct wim_dentry *duplicate;
1418 /* Read next child of @dir. */
1419 ret = read_dentry(buf, buf_len, cur_offset, &child);
1423 /* Check for end of directory. */
1427 /* Advance to the offset of the next child. Note: We need to
1428 * advance by the TOTAL length of the dentry, not by the length
1429 * child->length, which although it does take into account the
1430 * padding, it DOES NOT take into account alternate stream
1432 cur_offset += dentry_in_total_length(child);
1434 /* All dentries except the root should be named. */
1435 if (unlikely(!dentry_has_long_name(child))) {
1436 WARNING("Ignoring unnamed dentry in "
1437 "directory \"%"TS"\"", dentry_full_path(dir));
1442 /* Don't allow files named "." or "..". */
1443 if (unlikely(dentry_is_dot_or_dotdot(child))) {
1444 WARNING("Ignoring file named \".\" or \"..\"; "
1445 "potentially malicious archive!!!");
1450 /* Link the child into the directory. */
1451 duplicate = dentry_add_child(dir, child);
1452 if (unlikely(duplicate)) {
1453 /* We already found a dentry with this same
1454 * case-sensitive long name. Only keep the first one.
1456 WARNING("Ignoring duplicate file \"%"TS"\" "
1457 "(the WIM image already contains a file "
1458 "at that path with the exact same name)",
1459 dentry_full_path(duplicate));
1464 /* If this child is a directory that itself has children, call
1465 * this procedure recursively. */
1466 if (child->subdir_offset != 0) {
1467 if (likely(dentry_is_directory(child))) {
1468 ret = read_dentry_tree_recursive(buf,
1474 WARNING("Ignoring children of "
1475 "non-directory file \"%"TS"\"",
1476 dentry_full_path(child));
1483 * Read a tree of dentries (directory entries) from a WIM metadata resource.
1486 * Buffer containing an uncompressed WIM metadata resource.
1489 * Length of the uncompressed metadata resource, in bytes.
1492 * Offset in the metadata resource of the root of the dentry tree.
1495 * On success, either NULL or a pointer to the root dentry is written to
1496 * this location. The former case only occurs in the unexpected case that
1497 * the tree began with an end-of-directory entry.
1500 * WIMLIB_ERR_SUCCESS (0)
1501 * WIMLIB_ERR_INVALID_METADATA_RESOURCE
1505 read_dentry_tree(const u8 *buf, size_t buf_len,
1506 u64 root_offset, struct wim_dentry **root_ret)
1509 struct wim_dentry *root;
1511 DEBUG("Reading dentry tree (root_offset=%"PRIu64")", root_offset);
1513 ret = read_dentry(buf, buf_len, root_offset, &root);
1517 if (likely(root != NULL)) {
1518 if (unlikely(dentry_has_long_name(root) ||
1519 dentry_has_short_name(root)))
1521 WARNING("The root directory has a nonempty name; "
1523 FREE(root->file_name);
1524 FREE(root->short_name);
1525 root->file_name = NULL;
1526 root->short_name = NULL;
1527 root->file_name_nbytes = 0;
1528 root->short_name_nbytes = 0;
1531 if (unlikely(!dentry_is_directory(root))) {
1532 ERROR("The root of the WIM image is not a directory!");
1533 ret = WIMLIB_ERR_INVALID_METADATA_RESOURCE;
1534 goto err_free_dentry_tree;
1537 if (likely(root->subdir_offset != 0)) {
1538 ret = read_dentry_tree_recursive(buf, buf_len, root);
1540 goto err_free_dentry_tree;
1543 WARNING("The metadata resource has no directory entries; "
1544 "treating as an empty image.");
1549 err_free_dentry_tree:
1550 free_dentry_tree(root, NULL);
1555 * Writes a WIM alternate data stream (ADS) entry to an output buffer.
1557 * @ads_entry: The ADS entry structure.
1558 * @hash: The hash field to use (instead of the one in the ADS entry).
1559 * @p: The memory location to write the data to.
1561 * Returns a pointer to the byte after the last byte written.
1564 write_ads_entry(const struct wim_ads_entry *ads_entry,
1565 const u8 *hash, u8 * restrict p)
1567 struct wim_ads_entry_on_disk *disk_ads_entry =
1568 (struct wim_ads_entry_on_disk*)p;
1571 disk_ads_entry->reserved = cpu_to_le64(ads_entry->reserved);
1572 copy_hash(disk_ads_entry->hash, hash);
1573 disk_ads_entry->stream_name_nbytes = cpu_to_le16(ads_entry->stream_name_nbytes);
1574 p += sizeof(struct wim_ads_entry_on_disk);
1575 if (ads_entry->stream_name_nbytes) {
1576 p = mempcpy(p, ads_entry->stream_name,
1577 ads_entry->stream_name_nbytes + 2);
1579 /* Align to 8-byte boundary */
1580 while ((uintptr_t)p & 7)
1582 disk_ads_entry->length = cpu_to_le64(p - orig_p);
1587 * Writes a WIM dentry to an output buffer.
1589 * @dentry: The dentry structure.
1590 * @p: The memory location to write the data to.
1592 * Returns the pointer to the byte after the last byte we wrote as part of the
1593 * dentry, including any alternate data stream entries.
1596 write_dentry(const struct wim_dentry * restrict dentry, u8 * restrict p)
1598 const struct wim_inode *inode;
1599 struct wim_dentry_on_disk *disk_dentry;
1602 bool use_dummy_stream;
1605 wimlib_assert(((uintptr_t)p & 7) == 0); /* 8 byte aligned */
1608 inode = dentry->d_inode;
1609 use_dummy_stream = inode_needs_dummy_stream(inode);
1610 disk_dentry = (struct wim_dentry_on_disk*)p;
1612 disk_dentry->attributes = cpu_to_le32(inode->i_attributes);
1613 disk_dentry->security_id = cpu_to_le32(inode->i_security_id);
1614 disk_dentry->subdir_offset = cpu_to_le64(dentry->subdir_offset);
1615 disk_dentry->unused_1 = cpu_to_le64(0);
1616 disk_dentry->unused_2 = cpu_to_le64(0);
1617 disk_dentry->creation_time = cpu_to_le64(inode->i_creation_time);
1618 disk_dentry->last_access_time = cpu_to_le64(inode->i_last_access_time);
1619 disk_dentry->last_write_time = cpu_to_le64(inode->i_last_write_time);
1620 if (use_dummy_stream)
1623 hash = inode_stream_hash(inode, 0);
1624 copy_hash(disk_dentry->unnamed_stream_hash, hash);
1625 if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
1626 disk_dentry->reparse.rp_unknown_1 = cpu_to_le32(inode->i_rp_unknown_1);
1627 disk_dentry->reparse.reparse_tag = cpu_to_le32(inode->i_reparse_tag);
1628 disk_dentry->reparse.rp_unknown_2 = cpu_to_le16(inode->i_rp_unknown_2);
1629 disk_dentry->reparse.not_rpfixed = cpu_to_le16(inode->i_not_rpfixed);
1631 disk_dentry->nonreparse.rp_unknown_1 = cpu_to_le32(inode->i_rp_unknown_1);
1632 disk_dentry->nonreparse.hard_link_group_id =
1633 cpu_to_le64((inode->i_nlink == 1) ? 0 : inode->i_ino);
1635 num_ads = inode->i_num_ads;
1636 if (use_dummy_stream)
1638 disk_dentry->num_alternate_data_streams = cpu_to_le16(num_ads);
1639 disk_dentry->short_name_nbytes = cpu_to_le16(dentry->short_name_nbytes);
1640 disk_dentry->file_name_nbytes = cpu_to_le16(dentry->file_name_nbytes);
1641 p += sizeof(struct wim_dentry_on_disk);
1643 wimlib_assert(dentry_is_root(dentry) != dentry_has_long_name(dentry));
1645 if (dentry_has_long_name(dentry))
1646 p = mempcpy(p, dentry->file_name, dentry->file_name_nbytes + 2);
1648 if (dentry_has_short_name(dentry))
1649 p = mempcpy(p, dentry->short_name, dentry->short_name_nbytes + 2);
1651 /* Align to 8-byte boundary */
1652 while ((uintptr_t)p & 7)
1655 disk_dentry->length = cpu_to_le64(p - orig_p);
1657 if (use_dummy_stream) {
1658 hash = inode_unnamed_stream_hash(inode);
1659 p = write_ads_entry(&(struct wim_ads_entry){}, hash, p);
1662 /* Write the alternate data streams entries, if any. */
1663 for (u16 i = 0; i < inode->i_num_ads; i++) {
1664 hash = inode_stream_hash(inode, i + 1);
1665 p = write_ads_entry(&inode->i_ads_entries[i], hash, p);
1672 write_dir_dentries(struct wim_dentry *dir, void *_pp)
1674 if (dir->subdir_offset != 0) {
1677 struct wim_dentry *child;
1679 /* write child dentries */
1680 for_dentry_child(child, dir)
1681 p = write_dentry(child, p);
1683 /* write end of directory entry */
1691 /* Writes a directory tree to the metadata resource.
1693 * @root: Root of the dentry tree.
1694 * @p: Pointer to a buffer with enough space for the dentry tree.
1696 * Returns pointer to the byte after the last byte we wrote.
1699 write_dentry_tree(struct wim_dentry *root, u8 *p)
1701 DEBUG("Writing dentry tree.");
1702 wimlib_assert(dentry_is_root(root));
1704 /* write root dentry and end-of-directory entry following it */
1705 p = write_dentry(root, p);
1709 /* write the rest of the dentry tree */
1710 for_dentry_in_tree(root, write_dir_dentries, &p);