# include "config.h"
#endif
+#include "wimlib/assert.h"
#include "wimlib/endianness.h"
#include "wimlib/error.h"
-#include "wimlib/file_io.h"
-#include "wimlib/glob.h"
#include "wimlib/lookup_table.h"
#include "wimlib/metadata.h"
-#include "wimlib/paths.h"
+#include "wimlib/ntfs_3g.h"
#include "wimlib/resource.h"
#include "wimlib/util.h"
#include "wimlib/write.h"
-#include <errno.h>
#include <stdlib.h>
-#ifdef WITH_FUSE
-# include <unistd.h> /* for unlink() */
-#endif
+#include <string.h>
+#include <unistd.h> /* for unlink() */
+
+/* WIM lookup table:
+ *
+ * This is a logical mapping from SHA1 message digests to the data streams
+ * contained in a WIM.
+ *
+ * Here it is implemented as a hash table.
+ *
+ * Note: Everything will break horribly if there is a SHA1 collision.
+ */
+struct wim_lookup_table {
+ struct hlist_head *array;
+ size_t num_entries;
+ size_t capacity;
+};
struct wim_lookup_table *
new_lookup_table(size_t capacity)
struct wim_lookup_table *table;
struct hlist_head *array;
- table = CALLOC(1, sizeof(struct wim_lookup_table));
- if (table) {
- array = CALLOC(capacity, sizeof(array[0]));
- if (array) {
- table->num_entries = 0;
- table->capacity = capacity;
- table->array = array;
- } else {
- FREE(table);
- table = NULL;
- ERROR("Failed to allocate memory for lookup table "
- "with capacity %zu", capacity);
- }
+ table = MALLOC(sizeof(struct wim_lookup_table));
+ if (table == NULL)
+ goto oom;
+
+ array = CALLOC(capacity, sizeof(array[0]));
+ if (array == NULL) {
+ FREE(table);
+ goto oom;
}
+
+ table->num_entries = 0;
+ table->capacity = capacity;
+ table->array = array;
return table;
+
+oom:
+ ERROR("Failed to allocate memory for lookup table "
+ "with capacity %zu", capacity);
+ return NULL;
+}
+
+static int
+do_free_lookup_table_entry(struct wim_lookup_table_entry *entry, void *ignore)
+{
+ free_lookup_table_entry(entry);
+ return 0;
+}
+
+void
+free_lookup_table(struct wim_lookup_table *table)
+{
+ DEBUG("Freeing lookup table.");
+ if (table == NULL)
+ return;
+
+ if (table->array) {
+ for_lookup_table_entry(table,
+ do_free_lookup_table_entry,
+ NULL);
+ FREE(table->array);
+ }
+ FREE(table);
}
struct wim_lookup_table_entry *
struct wim_lookup_table_entry *lte;
lte = CALLOC(1, sizeof(struct wim_lookup_table_entry));
- if (lte == NULL) {
- ERROR("Out of memory (tried to allocate %zu bytes for "
- "lookup table entry)",
- sizeof(struct wim_lookup_table_entry));
+ if (lte == NULL)
return NULL;
- }
+
lte->refcnt = 1;
+
+ /* lte->resource_location = RESOURCE_NONEXISTENT */
BUILD_BUG_ON(RESOURCE_NONEXISTENT != 0);
+
return lte;
}
break;
}
return new;
+
out_free:
free_lookup_table_entry(new);
return NULL;
}
void
-free_lookup_table_entry(struct wim_lookup_table_entry *lte)
+lte_put_resource(struct wim_lookup_table_entry *lte)
{
- if (lte) {
- switch (lte->resource_location) {
- case RESOURCE_IN_WIM:
- list_del(<e->rspec_node);
- if (list_empty(<e->rspec->stream_list))
- FREE(lte->rspec);
- break;
- case RESOURCE_IN_FILE_ON_DISK:
- #ifdef __WIN32__
- case RESOURCE_WIN32_ENCRYPTED:
- #endif
- #ifdef WITH_FUSE
- case RESOURCE_IN_STAGING_FILE:
- BUILD_BUG_ON((void*)<e->file_on_disk !=
- (void*)<e->staging_file_name);
- #endif
- case RESOURCE_IN_ATTACHED_BUFFER:
- BUILD_BUG_ON((void*)<e->file_on_disk !=
- (void*)<e->attached_buffer);
- FREE(lte->file_on_disk);
- break;
-#ifdef WITH_NTFS_3G
- case RESOURCE_IN_NTFS_VOLUME:
- if (lte->ntfs_loc) {
- FREE(lte->ntfs_loc->path);
- FREE(lte->ntfs_loc->stream_name);
- FREE(lte->ntfs_loc);
- }
- break;
+ switch (lte->resource_location) {
+ case RESOURCE_IN_WIM:
+ list_del(<e->rspec_node);
+ if (list_empty(<e->rspec->stream_list))
+ FREE(lte->rspec);
+ break;
+ case RESOURCE_IN_FILE_ON_DISK:
+#ifdef __WIN32__
+ case RESOURCE_WIN32_ENCRYPTED:
#endif
- default:
- break;
+#ifdef WITH_FUSE
+ case RESOURCE_IN_STAGING_FILE:
+ BUILD_BUG_ON((void*)<e->file_on_disk !=
+ (void*)<e->staging_file_name);
+#endif
+ case RESOURCE_IN_ATTACHED_BUFFER:
+ BUILD_BUG_ON((void*)<e->file_on_disk !=
+ (void*)<e->attached_buffer);
+ FREE(lte->file_on_disk);
+ break;
+#ifdef WITH_NTFS_3G
+ case RESOURCE_IN_NTFS_VOLUME:
+ if (lte->ntfs_loc) {
+ FREE(lte->ntfs_loc->path);
+ FREE(lte->ntfs_loc->stream_name);
+ FREE(lte->ntfs_loc);
}
- FREE(lte);
+ break;
+#endif
+ default:
+ break;
}
}
-static int
-do_free_lookup_table_entry(struct wim_lookup_table_entry *entry, void *ignore)
+void
+free_lookup_table_entry(struct wim_lookup_table_entry *lte)
{
- free_lookup_table_entry(entry);
- return 0;
+ if (lte) {
+ lte_put_resource(lte);
+ FREE(lte);
+ }
}
-
+/* Decrements the reference count for the lookup table entry @lte. If its
+ * 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. */
void
-free_lookup_table(struct wim_lookup_table *table)
+lte_decrement_refcnt(struct wim_lookup_table_entry *lte,
+ struct wim_lookup_table *table)
{
- DEBUG("Freeing lookup table.");
- if (table) {
- if (table->array) {
- for_lookup_table_entry(table,
- do_free_lookup_table_entry,
- NULL);
- FREE(table->array);
+ wimlib_assert(lte->refcnt != 0);
+
+ if (--lte->refcnt == 0) {
+ if (lte->unhashed) {
+ list_del(<e->unhashed_list);
+ #ifdef WITH_FUSE
+ /* If the stream has been extracted to a staging file
+ * for a FUSE mount, unlink the staging file. (Note
+ * that there still may be open file descriptors to it.)
+ * */
+ if (lte->resource_location == RESOURCE_IN_STAGING_FILE)
+ unlink(lte->staging_file_name);
+ #endif
+ } else {
+ lookup_table_unlink(table, lte);
}
- FREE(table);
+
+ /* If FUSE mounts are enabled, we don't actually free the entry
+ * until the last file descriptor has been closed by
+ * lte_decrement_num_opened_fds(). */
+#ifdef WITH_FUSE
+ if (lte->num_opened_fds == 0)
+#endif
+ free_lookup_table_entry(lte);
}
}
+#ifdef WITH_FUSE
+void
+lte_decrement_num_opened_fds(struct wim_lookup_table_entry *lte)
+{
+ wimlib_assert(lte->num_opened_fds != 0);
+
+ if (--lte->num_opened_fds == 0 && lte->refcnt == 0)
+ free_lookup_table_entry(lte);
+}
+#endif
+
static void
lookup_table_insert_raw(struct wim_lookup_table *table,
struct wim_lookup_table_entry *lte)
FREE(old_array);
}
-
-/*
- * Inserts an entry into the lookup table.
- *
- * @table: A pointer to the lookup table.
- * @lte: A pointer to the entry to insert.
- */
+/* Inserts an entry into the lookup table. */
void
lookup_table_insert(struct wim_lookup_table *table,
struct wim_lookup_table_entry *lte)
enlarge_lookup_table(table);
}
-static void
-finalize_lte(struct wim_lookup_table_entry *lte)
-{
- #ifdef WITH_FUSE
- if (lte->resource_location == RESOURCE_IN_STAGING_FILE) {
- unlink(lte->staging_file_name);
- list_del(<e->unhashed_list);
- }
- #endif
- free_lookup_table_entry(lte);
-}
-
-/* Decrements the reference count for the lookup table entry @lte. If its
- * 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. */
+/* Unlinks a lookup table entry from the table; does not free it. */
void
-lte_decrement_refcnt(struct wim_lookup_table_entry *lte,
- struct wim_lookup_table *table)
+lookup_table_unlink(struct wim_lookup_table *table,
+ struct wim_lookup_table_entry *lte)
{
- wimlib_assert(lte != NULL);
- wimlib_assert(lte->refcnt != 0);
- if (--lte->refcnt == 0) {
- if (lte->unhashed)
- list_del(<e->unhashed_list);
- else
- lookup_table_unlink(table, lte);
- #ifdef WITH_FUSE
- if (lte->num_opened_fds == 0)
- #endif
- finalize_lte(lte);
- }
+ wimlib_assert(!lte->unhashed);
+ wimlib_assert(table->num_entries != 0);
+
+ hlist_del(<e->hash_list);
+ table->num_entries--;
}
-#ifdef WITH_FUSE
-void
-lte_decrement_num_opened_fds(struct wim_lookup_table_entry *lte)
+/* Given a SHA1 message digest, return the corresponding entry in the WIM's
+ * lookup table, or NULL if there is none. */
+struct wim_lookup_table_entry *
+lookup_stream(const struct wim_lookup_table *table, const u8 hash[])
{
- if (lte->num_opened_fds != 0)
- if (--lte->num_opened_fds == 0 && lte->refcnt == 0)
- finalize_lte(lte);
+ size_t i;
+ struct wim_lookup_table_entry *lte;
+ struct hlist_node *pos;
+
+ i = *(size_t*)hash % table->capacity;
+ hlist_for_each_entry(lte, pos, &table->array[i], hash_list)
+ if (hashes_equal(hash, lte->hash))
+ return lte;
+ return NULL;
}
-#endif
/* Calls a function on all the entries in the WIM lookup table. Stop early and
* return nonzero if any call to the function returns nonzero. */
/* If this is a packed run, the current stream entry may
* specify a stream within the resource, and not the
* resource itself. Zero possibly irrelevant data until
- * it is read for certain. */
+ * it is read for certain. (Note that the computation
+ * of 'back_to_back_pack' tests if 'size_in_wim' is
+ * nonzero to see if the resource info has been read;
+ * hence we need to set it to 0 here.) */
if (reshdr.flags & WIM_RESHDR_FLAG_PACKED_STREAMS) {
cur_rspec->size_in_wim = 0;
cur_rspec->uncompressed_size = 0;
*/
/* Uncompressed size of the resource pack is actually
- * stored in the header of the resource itself. */
+ * stored in the header of the resource itself. Read
+ * it, and also grab the chunk size and compression type
+ * (which are not necessarily the defaults from the WIM
+ * header). */
struct alt_chunk_table_header_disk hdr;
ret = full_pread(&wim->in_fd, &hdr,
cur_rspec->offset_in_wim = reshdr.offset_in_wim;
cur_rspec->size_in_wim = reshdr.size_in_wim;
cur_rspec->flags = reshdr.flags;
+
+ /* Compression format numbers must be the same as in
+ * WIMGAPI to be compatible here. */
+ BUILD_BUG_ON(WIMLIB_COMPRESSION_TYPE_NONE != 0);
+ BUILD_BUG_ON(WIMLIB_COMPRESSION_TYPE_LZX != 1);
+ BUILD_BUG_ON(WIMLIB_COMPRESSION_TYPE_XPRESS != 2);
+ BUILD_BUG_ON(WIMLIB_COMPRESSION_TYPE_LZMS != 3);
+ cur_rspec->compression_type = le32_to_cpu(hdr.compression_format);
+
+ cur_rspec->chunk_size = le32_to_cpu(hdr.chunk_size);
+
DEBUG("Full pack is %"PRIu64" compressed bytes "
"at file offset %"PRIu64" (flags 0x%02x)",
cur_rspec->size_in_wim,
}
if (cur_entry->refcnt != 1) {
- if (wimlib_print_errors) {
- ERROR("Found metadata resource with refcnt != 1:");
- print_lookup_table_entry(cur_entry, stderr);
- }
+ ERROR("Found metadata resource with refcnt != 1");
ret = WIMLIB_ERR_INVALID_LOOKUP_TABLE_ENTRY;
goto err;
}
/* Lookup table entry for a stream that is not a metadata
* resource. */
- duplicate_entry = lookup_resource(table, cur_entry->hash);
+ duplicate_entry = lookup_stream(table, cur_entry->hash);
if (duplicate_entry) {
- if (wimlib_print_errors) {
- WARNING("The WIM lookup table contains two entries with the "
- "same SHA1 message digest!");
- WARNING("The first entry is:");
- print_lookup_table_entry(duplicate_entry, stderr);
- WARNING("The second entry is:");
- print_lookup_table_entry(cur_entry, stderr);
- }
+ WARNING("The WIM lookup table contains two entries "
+ "with the same SHA1 message digest!");
free_lookup_table_entry(cur_entry);
continue;
}
return 0;
}
-void
-print_lookup_table_entry(const struct wim_lookup_table_entry *lte, FILE *out)
-{
- if (lte == NULL) {
- tputc(T('\n'), out);
- return;
- }
-
-
- tprintf(T("Uncompressed size = %"PRIu64" bytes\n"),
- lte->size);
- if (lte->flags & WIM_RESHDR_FLAG_PACKED_STREAMS) {
- tprintf(T("Offset = %"PRIu64" bytes\n"),
- lte->offset_in_res);
-
- tprintf(T("Raw uncompressed size = %"PRIu64" bytes\n"),
- lte->rspec->uncompressed_size);
-
- tprintf(T("Raw compressed size = %"PRIu64" bytes\n"),
- lte->rspec->size_in_wim);
-
- tprintf(T("Raw offset = %"PRIu64" bytes\n"),
- lte->rspec->offset_in_wim);
- } else if (lte->resource_location == RESOURCE_IN_WIM) {
- tprintf(T("Compressed size = %"PRIu64" bytes\n"),
- lte->rspec->size_in_wim);
-
- tprintf(T("Offset = %"PRIu64" bytes\n"),
- lte->rspec->offset_in_wim);
- }
-
- tfprintf(out, T("Reference Count = %u\n"), lte->refcnt);
-
- if (lte->unhashed) {
- tfprintf(out, T("(Unhashed: inode %p, stream_id = %u)\n"),
- lte->back_inode, lte->back_stream_id);
- } else {
- tfprintf(out, T("Hash = 0x"));
- print_hash(lte->hash, out);
- tputc(T('\n'), out);
- }
-
- tfprintf(out, T("Flags = "));
- u8 flags = lte->flags;
- if (flags & WIM_RESHDR_FLAG_COMPRESSED)
- tfputs(T("WIM_RESHDR_FLAG_COMPRESSED, "), out);
- if (flags & WIM_RESHDR_FLAG_FREE)
- tfputs(T("WIM_RESHDR_FLAG_FREE, "), out);
- if (flags & WIM_RESHDR_FLAG_METADATA)
- tfputs(T("WIM_RESHDR_FLAG_METADATA, "), out);
- if (flags & WIM_RESHDR_FLAG_SPANNED)
- tfputs(T("WIM_RESHDR_FLAG_SPANNED, "), out);
- if (flags & WIM_RESHDR_FLAG_PACKED_STREAMS)
- tfputs(T("WIM_RESHDR_FLAG_PACKED_STREAMS, "), out);
- tputc(T('\n'), out);
- switch (lte->resource_location) {
- case RESOURCE_IN_WIM:
- if (lte->rspec->wim->filename) {
- tfprintf(out, T("WIM file = `%"TS"'\n"),
- lte->rspec->wim->filename);
- }
- break;
-#ifdef __WIN32__
- case RESOURCE_WIN32_ENCRYPTED:
-#endif
- case RESOURCE_IN_FILE_ON_DISK:
- tfprintf(out, T("File on Disk = `%"TS"'\n"),
- lte->file_on_disk);
- break;
-#ifdef WITH_FUSE
- case RESOURCE_IN_STAGING_FILE:
- tfprintf(out, T("Staging File = `%"TS"'\n"),
- lte->staging_file_name);
- break;
-#endif
- default:
- break;
- }
- tputc(T('\n'), out);
-}
-
-void
-lte_to_wimlib_resource_entry(const struct wim_lookup_table_entry *lte,
- struct wimlib_resource_entry *wentry)
-{
- memset(wentry, 0, sizeof(*wentry));
-
- wentry->uncompressed_size = lte->size;
- if (lte->resource_location == RESOURCE_IN_WIM) {
- wentry->part_number = lte->rspec->wim->hdr.part_number;
- if (lte->flags & WIM_RESHDR_FLAG_PACKED_STREAMS) {
- wentry->compressed_size = 0;
- wentry->offset = lte->offset_in_res;
- } else {
- wentry->compressed_size = lte->rspec->size_in_wim;
- wentry->offset = lte->rspec->offset_in_wim;
- }
- wentry->raw_resource_offset_in_wim = lte->rspec->offset_in_wim;
- /*wentry->raw_resource_uncompressed_size = lte->rspec->uncompressed_size;*/
- wentry->raw_resource_compressed_size = lte->rspec->size_in_wim;
- }
- copy_hash(wentry->sha1_hash, lte->hash);
- wentry->reference_count = lte->refcnt;
- wentry->is_compressed = (lte->flags & WIM_RESHDR_FLAG_COMPRESSED) != 0;
- wentry->is_metadata = (lte->flags & WIM_RESHDR_FLAG_METADATA) != 0;
- wentry->is_free = (lte->flags & WIM_RESHDR_FLAG_FREE) != 0;
- wentry->is_spanned = (lte->flags & WIM_RESHDR_FLAG_SPANNED) != 0;
- wentry->packed = (lte->flags & WIM_RESHDR_FLAG_PACKED_STREAMS) != 0;
-}
-
-struct iterate_lte_context {
- wimlib_iterate_lookup_table_callback_t cb;
- void *user_ctx;
-};
-
-static int
-do_iterate_lte(struct wim_lookup_table_entry *lte, void *_ctx)
-{
- struct iterate_lte_context *ctx = _ctx;
- struct wimlib_resource_entry entry;
-
- lte_to_wimlib_resource_entry(lte, &entry);
- return (*ctx->cb)(&entry, ctx->user_ctx);
-}
-
-/* API function documented in wimlib.h */
-WIMLIBAPI int
-wimlib_iterate_lookup_table(WIMStruct *wim, int flags,
- wimlib_iterate_lookup_table_callback_t cb,
- void *user_ctx)
-{
- struct iterate_lte_context ctx = {
- .cb = cb,
- .user_ctx = user_ctx,
- };
- if (wim->hdr.part_number == 1) {
- int ret;
- for (int i = 0; i < wim->hdr.image_count; i++) {
- ret = do_iterate_lte(wim->image_metadata[i]->metadata_lte,
- &ctx);
- if (ret)
- return ret;
- }
- }
- return for_lookup_table_entry(wim->lookup_table, do_iterate_lte, &ctx);
-}
-
-/* Given a SHA1 message digest, return the corresponding entry in the WIM's
- * lookup table, or NULL if there is none. */
+/* Allocate a stream entry for the contents of the buffer, or re-use an existing
+ * entry in @lookup_table for the same stream. */
struct wim_lookup_table_entry *
-lookup_resource(const struct wim_lookup_table *table, const u8 hash[])
+new_stream_from_data_buffer(const void *buffer, size_t size,
+ struct wim_lookup_table *lookup_table)
{
- size_t i;
- struct wim_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))
- return lte;
- return NULL;
-}
-
-#ifdef WITH_FUSE
-/*
- * Finds the dentry, lookup table entry, and stream index for a WIM file stream,
- * given a path name.
- *
- * This is only for pre-resolved inodes.
- */
-int
-wim_pathname_to_stream(WIMStruct *wim,
- const tchar *path,
- int lookup_flags,
- struct wim_dentry **dentry_ret,
- struct wim_lookup_table_entry **lte_ret,
- u16 *stream_idx_ret)
-{
- struct wim_dentry *dentry;
- struct wim_lookup_table_entry *lte;
- u16 stream_idx;
- const tchar *stream_name = NULL;
- struct wim_inode *inode;
- tchar *p = NULL;
-
- if (lookup_flags & LOOKUP_FLAG_ADS_OK) {
- stream_name = path_stream_name(path);
- if (stream_name) {
- p = (tchar*)stream_name - 1;
- *p = T('\0');
- }
- }
-
- dentry = get_dentry(wim, path, WIMLIB_CASE_SENSITIVE);
- if (p)
- *p = T(':');
- if (!dentry)
- return -errno;
-
- inode = dentry->d_inode;
-
- if (!inode->i_resolved)
- if (inode_resolve_ltes(inode, wim->lookup_table, false))
- return -EIO;
-
- if (!(lookup_flags & LOOKUP_FLAG_DIRECTORY_OK)
- && inode_is_directory(inode))
- return -EISDIR;
-
- if (stream_name) {
- struct wim_ads_entry *ads_entry;
- u16 ads_idx;
- ads_entry = inode_get_ads_entry(inode, stream_name,
- &ads_idx);
- if (ads_entry) {
- stream_idx = ads_idx + 1;
- lte = ads_entry->lte;
- goto out;
- } else {
- return -ENOENT;
- }
+ u8 hash[SHA1_HASH_SIZE];
+ struct wim_lookup_table_entry *lte, *existing_lte;
+
+ sha1_buffer(buffer, size, hash);
+ existing_lte = lookup_stream(lookup_table, hash);
+ if (existing_lte) {
+ wimlib_assert(existing_lte->size == size);
+ lte = existing_lte;
+ lte->refcnt++;
} else {
- lte = inode_unnamed_stream_resolved(inode, &stream_idx);
- }
-out:
- if (dentry_ret)
- *dentry_ret = dentry;
- if (lte_ret)
- *lte_ret = lte;
- if (stream_idx_ret)
- *stream_idx_ret = stream_idx;
- return 0;
-}
-#endif
-
-int
-resource_not_found_error(const struct wim_inode *inode, const u8 *hash)
-{
- if (wimlib_print_errors) {
- ERROR("\"%"TS"\": resource not found", inode_first_full_path(inode));
- tfprintf(stderr, T(" SHA-1 message digest of missing resource:\n "));
- print_hash(hash, stderr);
- tputc(T('\n'), stderr);
- }
- return WIMLIB_ERR_RESOURCE_NOT_FOUND;
-}
-
-/*
- * Resolve an inode'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.
- *
- * If @force is %false:
- * If any needed SHA1 message digests are not found in the lookup table,
- * WIMLIB_ERR_RESOURCE_NOT_FOUND is returned and the inode is left
- * unmodified.
- * If @force is %true:
- * If any needed SHA1 message digests are not found in the lookup table,
- * new entries are allocated and inserted into the lookup table.
- */
-int
-inode_resolve_ltes(struct wim_inode *inode, struct wim_lookup_table *table,
- bool force)
-{
- const u8 *hash;
-
- if (!inode->i_resolved) {
- struct wim_lookup_table_entry *lte, *ads_lte;
-
- /* Resolve the default file stream */
- lte = NULL;
- hash = inode->i_hash;
- if (!is_zero_hash(hash)) {
- lte = lookup_resource(table, hash);
- if (!lte) {
- if (force) {
- lte = new_lookup_table_entry();
- if (!lte)
- return WIMLIB_ERR_NOMEM;
- copy_hash(lte->hash, hash);
- lookup_table_insert(table, lte);
- } else {
- goto resource_not_found;
- }
- }
- }
-
- /* Resolve the alternate data streams */
- struct wim_lookup_table_entry *ads_ltes[inode->i_num_ads];
- for (u16 i = 0; i < inode->i_num_ads; i++) {
- struct wim_ads_entry *cur_entry;
-
- ads_lte = NULL;
- cur_entry = &inode->i_ads_entries[i];
- hash = cur_entry->hash;
- if (!is_zero_hash(hash)) {
- ads_lte = lookup_resource(table, hash);
- if (!ads_lte) {
- if (force) {
- ads_lte = new_lookup_table_entry();
- if (!ads_lte)
- return WIMLIB_ERR_NOMEM;
- copy_hash(ads_lte->hash, hash);
- lookup_table_insert(table, ads_lte);
- } else {
- goto resource_not_found;
- }
- }
- }
- ads_ltes[i] = ads_lte;
- }
- inode->i_lte = lte;
- for (u16 i = 0; i < inode->i_num_ads; i++)
- inode->i_ads_entries[i].lte = ads_ltes[i];
- inode->i_resolved = 1;
- }
- return 0;
-
-resource_not_found:
- return resource_not_found_error(inode, hash);
-}
-
-void
-inode_unresolve_ltes(struct wim_inode *inode)
-{
- if (inode->i_resolved) {
- if (inode->i_lte)
- copy_hash(inode->i_hash, inode->i_lte->hash);
- else
- zero_out_hash(inode->i_hash);
-
- for (u16 i = 0; i < inode->i_num_ads; i++) {
- if (inode->i_ads_entries[i].lte)
- copy_hash(inode->i_ads_entries[i].hash,
- inode->i_ads_entries[i].lte->hash);
- else
- zero_out_hash(inode->i_ads_entries[i].hash);
- }
- inode->i_resolved = 0;
- }
-}
-
-/*
- * Returns the lookup table entry for stream @stream_idx of the inode, where
- * stream_idx = 0 means the default un-named file stream, and stream_idx >= 1
- * corresponds to an alternate data stream.
- *
- * This works for both resolved and un-resolved inodes.
- */
-struct wim_lookup_table_entry *
-inode_stream_lte(const struct wim_inode *inode, unsigned stream_idx,
- const struct wim_lookup_table *table)
-{
- if (inode->i_resolved)
- return inode_stream_lte_resolved(inode, stream_idx);
- else
- return inode_stream_lte_unresolved(inode, stream_idx, table);
-}
-
-struct wim_lookup_table_entry *
-inode_unnamed_stream_resolved(const struct wim_inode *inode, u16 *stream_idx_ret)
-{
- wimlib_assert(inode->i_resolved);
- for (unsigned i = 0; i <= inode->i_num_ads; i++) {
- if (inode_stream_name_nbytes(inode, i) == 0 &&
- !is_zero_hash(inode_stream_hash_resolved(inode, i)))
- {
- *stream_idx_ret = i;
- return inode_stream_lte_resolved(inode, i);
- }
- }
- *stream_idx_ret = 0;
- return NULL;
-}
-
-struct wim_lookup_table_entry *
-inode_unnamed_lte_resolved(const struct wim_inode *inode)
-{
- u16 stream_idx;
- return inode_unnamed_stream_resolved(inode, &stream_idx);
-}
-
-struct wim_lookup_table_entry *
-inode_unnamed_lte_unresolved(const struct wim_inode *inode,
- const struct wim_lookup_table *table)
-{
- wimlib_assert(!inode->i_resolved);
- for (unsigned i = 0; i <= inode->i_num_ads; i++) {
- if (inode_stream_name_nbytes(inode, i) == 0 &&
- !is_zero_hash(inode_stream_hash_unresolved(inode, i)))
- {
- return inode_stream_lte_unresolved(inode, i, table);
- }
- }
- return NULL;
-}
-
-/* Return the lookup table entry for the unnamed data stream of an inode, or
- * NULL if there is none.
- *
- * You'd think this would be easier than it actually is, since the unnamed data
- * stream should be the one referenced from the inode itself. Alas, if there
- * are named data streams, Microsoft's "imagex.exe" program will put the unnamed
- * 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 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
- * missing entry as an empty file or empty named data stream.
- */
-struct wim_lookup_table_entry *
-inode_unnamed_lte(const struct wim_inode *inode,
- const struct wim_lookup_table *table)
-{
- if (inode->i_resolved)
- return inode_unnamed_lte_resolved(inode);
- else
- return inode_unnamed_lte_unresolved(inode, table);
-}
-
-/* Returns the SHA1 message digest of the unnamed data stream of a WIM inode, or
- * 'zero_hash' if the unnamed data stream is missing has all zeroes in its SHA1
- * message digest field. */
-const u8 *
-inode_unnamed_stream_hash(const struct wim_inode *inode)
-{
- const u8 *hash;
-
- for (unsigned i = 0; i <= inode->i_num_ads; i++) {
- if (inode_stream_name_nbytes(inode, i) == 0) {
- hash = inode_stream_hash(inode, i);
- if (!is_zero_hash(hash))
- return hash;
+ void *buffer_copy;
+ lte = new_lookup_table_entry();
+ if (lte == NULL)
+ return NULL;
+ buffer_copy = memdup(buffer, size);
+ if (buffer_copy == NULL) {
+ free_lookup_table_entry(lte);
+ return NULL;
}
+ lte->resource_location = RESOURCE_IN_ATTACHED_BUFFER;
+ lte->attached_buffer = buffer_copy;
+ lte->size = size;
+ copy_hash(lte->hash, hash);
+ lookup_table_insert(lookup_table, lte);
}
- return zero_hash;
-}
-
-struct wim_lookup_table_entry **
-retrieve_lte_pointer(struct wim_lookup_table_entry *lte)
-{
- wimlib_assert(lte->unhashed);
- struct wim_inode *inode = lte->back_inode;
- u32 stream_id = lte->back_stream_id;
- if (stream_id == 0)
- return &inode->i_lte;
- else
- for (u16 i = 0; i < inode->i_num_ads; i++)
- if (inode->i_ads_entries[i].stream_id == stream_id)
- return &inode->i_ads_entries[i].lte;
- wimlib_assert(0);
- return NULL;
+ return lte;
}
/* Calculate the SHA1 message digest of a stream and move it from the list of
return ret;
/* Look for a duplicate stream */
- duplicate_lte = lookup_resource(lookup_table, lte->hash);
+ duplicate_lte = lookup_stream(lookup_table, lte->hash);
list_del(<e->unhashed_list);
if (duplicate_lte) {
/* We have a duplicate stream. Transfer the reference counts
return 0;
}
-static int
-lte_clone_if_new(struct wim_lookup_table_entry *lte, void *_lookup_table)
-{
- struct wim_lookup_table *lookup_table = _lookup_table;
-
- if (lookup_resource(lookup_table, lte->hash))
- return 0; /* Resource already present. */
-
- lte = clone_lookup_table_entry(lte);
- if (lte == NULL)
- return WIMLIB_ERR_NOMEM;
- lte->out_refcnt = 1;
- lookup_table_insert(lookup_table, lte);
- return 0;
-}
-
-static int
-lte_delete_if_new(struct wim_lookup_table_entry *lte, void *_lookup_table)
-{
- struct wim_lookup_table *lookup_table = _lookup_table;
-
- if (lte->out_refcnt) {
- lookup_table_unlink(lookup_table, lte);
- free_lookup_table_entry(lte);
- }
- return 0;
-}
-
-/* API function documented in wimlib.h */
-WIMLIBAPI int
-wimlib_reference_resources(WIMStruct *wim,
- WIMStruct **resource_wims, unsigned num_resource_wims,
- int ref_flags)
+void
+lte_to_wimlib_resource_entry(const struct wim_lookup_table_entry *lte,
+ struct wimlib_resource_entry *wentry)
{
- int ret;
- unsigned i;
-
- if (wim == NULL)
- return WIMLIB_ERR_INVALID_PARAM;
-
- if (num_resource_wims != 0 && resource_wims == NULL)
- return WIMLIB_ERR_INVALID_PARAM;
-
- for (i = 0; i < num_resource_wims; i++)
- if (resource_wims[i] == NULL)
- return WIMLIB_ERR_INVALID_PARAM;
-
- for_lookup_table_entry(wim->lookup_table, lte_zero_out_refcnt, NULL);
+ memset(wentry, 0, sizeof(*wentry));
- for (i = 0; i < num_resource_wims; i++) {
- ret = for_lookup_table_entry(resource_wims[i]->lookup_table,
- lte_clone_if_new,
- wim->lookup_table);
- if (ret)
- goto out_rollback;
+ wentry->uncompressed_size = lte->size;
+ if (lte->resource_location == RESOURCE_IN_WIM) {
+ wentry->part_number = lte->rspec->wim->hdr.part_number;
+ if (lte->flags & WIM_RESHDR_FLAG_PACKED_STREAMS) {
+ wentry->compressed_size = 0;
+ wentry->offset = lte->offset_in_res;
+ } else {
+ wentry->compressed_size = lte->rspec->size_in_wim;
+ wentry->offset = lte->rspec->offset_in_wim;
+ }
+ wentry->raw_resource_offset_in_wim = lte->rspec->offset_in_wim;
+ /*wentry->raw_resource_uncompressed_size = lte->rspec->uncompressed_size;*/
+ wentry->raw_resource_compressed_size = lte->rspec->size_in_wim;
}
- return 0;
-
-out_rollback:
- for_lookup_table_entry(wim->lookup_table, lte_delete_if_new,
- wim->lookup_table);
- return ret;
+ copy_hash(wentry->sha1_hash, lte->hash);
+ wentry->reference_count = lte->refcnt;
+ wentry->is_compressed = (lte->flags & WIM_RESHDR_FLAG_COMPRESSED) != 0;
+ wentry->is_metadata = (lte->flags & WIM_RESHDR_FLAG_METADATA) != 0;
+ wentry->is_free = (lte->flags & WIM_RESHDR_FLAG_FREE) != 0;
+ wentry->is_spanned = (lte->flags & WIM_RESHDR_FLAG_SPANNED) != 0;
+ wentry->packed = (lte->flags & WIM_RESHDR_FLAG_PACKED_STREAMS) != 0;
}
-static int
-reference_resource_paths(WIMStruct *wim,
- const tchar * const *resource_wimfiles,
- unsigned num_resource_wimfiles,
- int ref_flags,
- int open_flags,
- wimlib_progress_func_t progress_func)
-{
- WIMStruct **resource_wims;
- unsigned i;
- int ret;
-
- resource_wims = CALLOC(num_resource_wimfiles, sizeof(resource_wims[0]));
- if (!resource_wims)
- return WIMLIB_ERR_NOMEM;
-
- for (i = 0; i < num_resource_wimfiles; i++) {
- DEBUG("Referencing resources from path \"%"TS"\"",
- resource_wimfiles[i]);
- ret = wimlib_open_wim(resource_wimfiles[i], open_flags,
- &resource_wims[i], progress_func);
- if (ret)
- goto out_free_resource_wims;
- }
-
- ret = wimlib_reference_resources(wim, resource_wims,
- num_resource_wimfiles, ref_flags);
- if (ret)
- goto out_free_resource_wims;
-
- for (i = 0; i < num_resource_wimfiles; i++)
- list_add_tail(&resource_wims[i]->subwim_node, &wim->subwims);
-
- ret = 0;
- goto out_free_array;
-
-out_free_resource_wims:
- for (i = 0; i < num_resource_wimfiles; i++)
- wimlib_free(resource_wims[i]);
-out_free_array:
- FREE(resource_wims);
- return ret;
-}
+struct iterate_lte_context {
+ wimlib_iterate_lookup_table_callback_t cb;
+ void *user_ctx;
+};
static int
-reference_resource_glob(WIMStruct *wim, const tchar *refglob,
- int ref_flags, int open_flags,
- wimlib_progress_func_t progress_func)
+do_iterate_lte(struct wim_lookup_table_entry *lte, void *_ctx)
{
- glob_t globbuf;
- int ret;
-
- /* Note: glob() is replaced in Windows native builds. */
- ret = tglob(refglob, GLOB_ERR | GLOB_NOSORT, NULL, &globbuf);
- if (ret) {
- if (ret == GLOB_NOMATCH) {
- if (ref_flags & WIMLIB_REF_FLAG_GLOB_ERR_ON_NOMATCH) {
- ERROR("Found no files for glob \"%"TS"\"", refglob);
- return WIMLIB_ERR_GLOB_HAD_NO_MATCHES;
- } else {
- return reference_resource_paths(wim,
- &refglob,
- 1,
- ref_flags,
- open_flags,
- progress_func);
- }
- } else {
- ERROR_WITH_ERRNO("Failed to process glob \"%"TS"\"", refglob);
- if (ret == GLOB_NOSPACE)
- return WIMLIB_ERR_NOMEM;
- else
- return WIMLIB_ERR_READ;
- }
- }
+ struct iterate_lte_context *ctx = _ctx;
+ struct wimlib_resource_entry entry;
- ret = reference_resource_paths(wim,
- (const tchar * const *)globbuf.gl_pathv,
- globbuf.gl_pathc,
- ref_flags,
- open_flags,
- progress_func);
- globfree(&globbuf);
- return ret;
+ lte_to_wimlib_resource_entry(lte, &entry);
+ return (*ctx->cb)(&entry, ctx->user_ctx);
}
/* API function documented in wimlib.h */
WIMLIBAPI int
-wimlib_reference_resource_files(WIMStruct *wim,
- const tchar * const * resource_wimfiles_or_globs,
- unsigned count,
- int ref_flags,
- int open_flags,
- wimlib_progress_func_t progress_func)
+wimlib_iterate_lookup_table(WIMStruct *wim, int flags,
+ wimlib_iterate_lookup_table_callback_t cb,
+ void *user_ctx)
{
- unsigned i;
- int ret;
+ if (flags != 0)
+ return WIMLIB_ERR_INVALID_PARAM;
- if (ref_flags & WIMLIB_REF_FLAG_GLOB_ENABLE) {
- for (i = 0; i < count; i++) {
- ret = reference_resource_glob(wim,
- resource_wimfiles_or_globs[i],
- ref_flags,
- open_flags,
- progress_func);
+ struct iterate_lte_context ctx = {
+ .cb = cb,
+ .user_ctx = user_ctx,
+ };
+ if (wim->hdr.part_number == 1) {
+ int ret;
+ for (int i = 0; i < wim->hdr.image_count; i++) {
+ ret = do_iterate_lte(wim->image_metadata[i]->metadata_lte,
+ &ctx);
if (ret)
return ret;
}
- return 0;
- } else {
- return reference_resource_paths(wim, resource_wimfiles_or_globs,
- count, ref_flags,
- open_flags, progress_func);
}
+ return for_lookup_table_entry(wim->lookup_table, do_iterate_lte, &ctx);
}
git://wimlib.net / wimlib / blobdiff