struct lookup_table_entry *new_lookup_table_entry()
{
struct lookup_table_entry *lte;
-
+
lte = CALLOC(1, sizeof(struct lookup_table_entry));
- if (!lte) {
+ if (lte) {
+ lte->part_number = 1;
+ lte->refcnt = 1;
+ } else {
ERROR("Out of memory (tried to allocate %zu bytes for "
"lookup table entry)",
sizeof(struct lookup_table_entry));
- return NULL;
}
-
- lte->part_number = 1;
- lte->refcnt = 1;
return lte;
}
+struct lookup_table_entry *
+clone_lookup_table_entry(const struct lookup_table_entry *old)
+{
+ struct lookup_table_entry *new;
+
+ new = MALLOC(sizeof(*new));
+ if (!new)
+ return NULL;
+
+ memcpy(new, old, sizeof(*old));
+ new->extracted_file = NULL;
+ switch (new->resource_location) {
+ case RESOURCE_IN_STAGING_FILE:
+ case RESOURCE_IN_FILE_ON_DISK:
+ wimlib_assert((void*)&old->file_on_disk ==
+ (void*)&old->staging_file_name);
+ new->staging_file_name = STRDUP(old->staging_file_name);
+ if (!new->staging_file_name)
+ goto out_free;
+ break;
+ case RESOURCE_IN_ATTACHED_BUFFER:
+ new->attached_buffer = MALLOC(wim_resource_size(old));
+ if (!new->attached_buffer)
+ goto out_free;
+ memcpy(new->attached_buffer, old->attached_buffer,
+ wim_resource_size(old));
+ break;
+ case RESOURCE_IN_NTFS_VOLUME:
+ if (old->ntfs_loc) {
+ struct ntfs_location *loc;
+ loc = MALLOC(sizeof(*loc));
+ if (!loc)
+ goto out_free;
+ memcpy(loc, old->ntfs_loc, sizeof(*loc));
+ loc->path_utf8 = NULL;
+ loc->stream_name_utf16 = NULL;
+ new->ntfs_loc = loc;
+ loc->path_utf8 = STRDUP(old->ntfs_loc->path_utf8);
+ if (!loc->path_utf8)
+ goto out_free;
+ loc->stream_name_utf16 = MALLOC(loc->stream_name_utf16_num_chars * 2);
+ if (!loc->stream_name_utf16)
+ goto out_free;
+ memcpy(loc->stream_name_utf16,
+ old->ntfs_loc->stream_name_utf16,
+ loc->stream_name_utf16_num_chars * 2);
+ }
+ break;
+ }
+ return new;
+out_free:
+ free_lookup_table_entry(new);
+ return NULL;
+}
+
void free_lookup_table_entry(struct lookup_table_entry *lte)
{
if (lte) {
* @table: A pointer to the lookup table.
* @entry: A pointer to the entry to insert.
*/
-void lookup_table_insert(struct lookup_table *table,
+void lookup_table_insert(struct lookup_table *table,
struct lookup_table_entry *lte)
{
size_t i = lte->hash_short % table->capacity;
if (lte->resource_location == RESOURCE_IN_STAGING_FILE) {
unlink(lte->staging_file_name);
wimlib_assert(lte->staging_list.next);
+ wimlib_assert(lte->staging_list.prev);
list_del(<e->staging_list);
}
#endif
* reference count reaches 0, it is unlinked from the lookup table. If,
* furthermore, the entry has no opened file descriptors associated with it, the
* entry is freed. */
-struct lookup_table_entry *
-lte_decrement_refcnt(struct lookup_table_entry *lte, struct lookup_table *table)
+void lte_decrement_refcnt(struct lookup_table_entry *lte,
+ struct lookup_table *table)
{
- if (lte) {
- wimlib_assert(lte->refcnt);
- if (--lte->refcnt == 0) {
- lookup_table_unlink(table, lte);
- #ifdef WITH_FUSE
- if (lte->num_opened_fds == 0)
- #endif
- {
- finalize_lte(lte);
- lte = NULL;
- }
- }
+ wimlib_assert(lte);
+ wimlib_assert(lte->refcnt);
+ if (--lte->refcnt == 0) {
+ lookup_table_unlink(table, lte);
+ #ifdef WITH_FUSE
+ if (lte->num_opened_fds == 0)
+ #endif
+ finalize_lte(lte);
}
- return lte;
}
#ifdef WITH_FUSE
-struct lookup_table_entry *
-lte_decrement_num_opened_fds(struct lookup_table_entry *lte,
- struct lookup_table *table)
+void lte_decrement_num_opened_fds(struct lookup_table_entry *lte,
+ struct lookup_table *table)
{
- if (lte) {
- wimlib_assert(lte->num_opened_fds);
- if (--lte->num_opened_fds == 0 && lte->refcnt == 0) {
- lookup_table_unlink(table, lte);
- finalize_lte(lte);
- lte = NULL;
- }
- }
- return lte;
+ wimlib_assert(lte);
+ wimlib_assert(lte->num_opened_fds);
+ if (--lte->num_opened_fds == 0 && lte->refcnt == 0)
+ finalize_lte(lte);
}
#endif
-/*
+/*
* Calls a function on all the entries in the lookup table. Stop early and
* return nonzero if any call to the function returns nonzero.
*/
-int for_lookup_table_entry(struct lookup_table *table,
+int for_lookup_table_entry(struct lookup_table *table,
int (*visitor)(struct lookup_table_entry *, void *),
void *arg)
{
w->hdr.lookup_table_res_entry.offset,
w->hdr.lookup_table_res_entry.original_size);
- if (fseeko(w->fp, w->hdr.lookup_table_res_entry.offset, SEEK_SET) != 0) {
+ if (fseeko(w->fp, w->hdr.lookup_table_res_entry.offset, SEEK_SET) != 0)
+ {
ERROR_WITH_ERRNO("Failed to seek to byte %"PRIu64" to read "
"lookup table",
w->hdr.lookup_table_res_entry.offset);
}
cur_entry->wim = w;
cur_entry->resource_location = RESOURCE_IN_WIM;
-
+
p = get_resource_entry(buf, &cur_entry->resource_entry);
p = get_u16(p, &cur_entry->part_number);
p = get_u32(p, &cur_entry->refcnt);
w->hdr.part_number, cur_entry->part_number);
ret = WIMLIB_ERR_INVALID_LOOKUP_TABLE_ENTRY;
goto out_free_cur_entry;
-
}
if (is_zero_hash(cur_entry->hash)) {
goto out_free_cur_entry;
}
+ /* Ordinarily, no two streams should share the same SHA1 message
+ * digest. However, this constraint can be broken for metadata
+ * resources--- two identical images will have the same metadata
+ * resource, but their lookup table entries are not shared. */
duplicate_entry = __lookup_resource(table, cur_entry->hash);
- if (duplicate_entry) {
+ if (duplicate_entry
+ && !((duplicate_entry->resource_entry.flags & WIM_RESHDR_FLAG_METADATA)
+ && cur_entry->resource_entry.flags & WIM_RESHDR_FLAG_METADATA))
+ {
ERROR("The WIM lookup table contains two entries with the "
"same SHA1 message digest!");
ERROR("The first entry is:");
if (!(cur_entry->resource_entry.flags & WIM_RESHDR_FLAG_COMPRESSED)
&& (cur_entry->resource_entry.size !=
- cur_entry->resource_entry.original_size))
+ cur_entry->resource_entry.original_size))
{
ERROR("Found uncompressed resource with original size "
"not the same as compressed size");
}
-/*
+/*
* Writes a lookup table entry to the output file.
*/
int write_lookup_table_entry(struct lookup_table_entry *lte, void *__out)
putchar('\n');
return;
}
- printf("Offset = %"PRIu64" bytes\n",
+ printf("Offset = %"PRIu64" bytes\n",
lte->resource_entry.offset);
- printf("Size = %"PRIu64" bytes\n",
+ printf("Size = %"PRIu64" bytes\n",
(u64)lte->resource_entry.size);
- printf("Original size = %"PRIu64" bytes\n",
+ printf("Original size = %"PRIu64" bytes\n",
lte->resource_entry.original_size);
printf("Part Number = %hu\n", lte->part_number);
printf("Reference Count = %u\n", lte->refcnt);
}
/*
- * Prints the lookup table of a WIM file.
+ * Prints the lookup table of a WIM file.
*/
WIMLIBAPI void wimlib_print_lookup_table(WIMStruct *w)
{
- for_lookup_table_entry(w->lookup_table,
+ for_lookup_table_entry(w->lookup_table,
do_print_lookup_table_entry,
NULL);
}
-/*
+/*
* Looks up an entry in the lookup table.
*/
struct lookup_table_entry *
struct lookup_table_entry *lte;
struct hlist_node *pos;
+ wimlib_assert(table != NULL);
+ wimlib_assert(hash != NULL);
+
i = *(size_t*)hash % table->capacity;
hlist_for_each_entry(lte, pos, &table->array[i], hash_list)
if (hashes_equal(hash, lte->hash))
}
#ifdef WITH_FUSE
-/*
+/*
* Finds the dentry, lookup table entry, and stream index for a WIM file stream,
* given a path name.
*
if (!dentry)
return -ENOENT;
- inode = dentry->inode;
+ inode = dentry->d_inode;
wimlib_assert(inode->resolved);
{
struct lookup_table_entry *lte;
+ wimlib_assert(!inode->resolved);
+
/* Resolve the default file stream */
lte = __lookup_resource(table, inode->hash);
inode->lte = lte;
}
}
-/* Resolve a dentry's lookup table entries
+static void inode_unresolve_ltes(struct inode *inode)
+{
+ wimlib_assert(inode->resolved);
+ if (inode->lte)
+ copy_hash(inode->hash, inode->lte->hash);
+ else
+ zero_out_hash(inode->hash);
+
+ for (u16 i = 0; i < inode->num_ads; i++) {
+ if (inode->ads_entries[i].lte)
+ copy_hash(inode->ads_entries[i].hash,
+ inode->ads_entries[i].lte->hash);
+ else
+ zero_out_hash(inode->ads_entries[i].hash);
+ }
+ inode->resolved = false;
+}
+
+/* Resolve a dentry's lookup table entries
*
* This replaces the SHA1 hash fields (which are used to lookup an entry in the
* lookup table) with pointers directly to the lookup table entries. A circular
*/
int dentry_resolve_ltes(struct dentry *dentry, void *table)
{
- if (!dentry->inode->resolved)
- inode_resolve_ltes(dentry->inode, table);
+ if (!dentry->d_inode->resolved)
+ inode_resolve_ltes(dentry->d_inode, table);
+ return 0;
+}
+
+int dentry_unresolve_ltes(struct dentry *dentry, void *ignore)
+{
+ if (dentry->d_inode->resolved)
+ inode_unresolve_ltes(dentry->d_inode);
return 0;
}
* data stream in one of the alternate data streams instead of inside the WIM
* dentry itself. So we need to check the alternate data streams too.
*
- * Also, note that a dentry may appear to have than one unnamed stream, but if
- * the SHA1 message digest is all 0's then the corresponding stream does not
+ * Also, note that a dentry may appear to have more than one unnamed stream, but
+ * if the SHA1 message digest is all 0's then the corresponding stream does not
* really "count" (this is the case for the inode's own file stream when the
* file stream that should be there is actually in one of the alternate stream
* entries.). This is despite the fact that we may need to extract such a
git://wimlib.net / wimlib / blobdiff