/*
* lookup_table.c
*
- * Lookup table, implemented as a hash table, that maps dentries to file
- * resources.
+ * Lookup table, implemented as a hash table, that maps SHA1 message digests to
+ * data streams.
*/
/*
- * Copyright (C) 2012 Eric Biggers
+ * Copyright (C) 2012, 2013 Eric Biggers
*
* This file is part of wimlib, a library for working with WIM files.
*
* along with wimlib; if not, see http://www.gnu.org/licenses/.
*/
-#include "wimlib_internal.h"
-#include "lookup_table.h"
-#include "io.h"
-#include <errno.h>
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include "wimlib/endianness.h"
+#include "wimlib/error.h"
+#include "wimlib/file_io.h"
+#include "wimlib/lookup_table.h"
+#include "wimlib/metadata.h"
+#include "wimlib/paths.h"
+#include "wimlib/resource.h"
+#include "wimlib/util.h"
+
+#include <errno.h>
+#include <stdlib.h>
#ifdef WITH_FUSE
-#include <unistd.h>
+# include <unistd.h> /* for unlink() */
#endif
-struct lookup_table *new_lookup_table(size_t capacity)
+struct wim_lookup_table *
+new_lookup_table(size_t capacity)
{
- struct lookup_table *table;
+ struct wim_lookup_table *table;
struct hlist_head *array;
- table = MALLOC(sizeof(struct lookup_table));
- if (!table)
- goto err;
- array = CALLOC(capacity, sizeof(array[0]));
- if (!array) {
- FREE(table);
- goto err;
+ 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->num_entries = 0;
- table->capacity = capacity;
- table->array = array;
return table;
-err:
- ERROR("Failed to allocate memory for lookup table with capacity %zu",
- capacity);
- return NULL;
}
-struct lookup_table_entry *new_lookup_table_entry()
+struct wim_lookup_table_entry *
+new_lookup_table_entry(void)
{
- struct lookup_table_entry *lte;
-
- lte = CALLOC(1, sizeof(struct lookup_table_entry));
- if (!lte) {
+ struct wim_lookup_table_entry *lte;
+
+ lte = CALLOC(1, sizeof(struct wim_lookup_table_entry));
+ 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;
+ sizeof(struct wim_lookup_table_entry));
}
-
- lte->part_number = 1;
- lte->refcnt = 1;
return lte;
}
-void free_lookup_table_entry(struct lookup_table_entry *lte)
+struct wim_lookup_table_entry *
+clone_lookup_table_entry(const struct wim_lookup_table_entry *old)
{
- if (lte) {
+ struct wim_lookup_table_entry *new;
+
+ new = memdup(old, sizeof(struct wim_lookup_table_entry));
+ if (!new)
+ return NULL;
+
+ new->extracted_file = NULL;
+ switch (new->resource_location) {
+#ifdef __WIN32__
+ case RESOURCE_WIN32:
+ case RESOURCE_WIN32_ENCRYPTED:
+#else
+ case RESOURCE_IN_FILE_ON_DISK:
+#endif
#ifdef WITH_FUSE
- if (lte->staging_list.next)
- list_del(<e->staging_list);
+ case RESOURCE_IN_STAGING_FILE:
+ BUILD_BUG_ON((void*)&old->file_on_disk !=
+ (void*)&old->staging_file_name);
#endif
+ new->file_on_disk = TSTRDUP(old->file_on_disk);
+ if (!new->file_on_disk)
+ goto out_free;
+ break;
+ case RESOURCE_IN_ATTACHED_BUFFER:
+ new->attached_buffer = memdup(old->attached_buffer,
+ wim_resource_size(old));
+ if (!new->attached_buffer)
+ goto out_free;
+ break;
+#ifdef WITH_NTFS_3G
+ case RESOURCE_IN_NTFS_VOLUME:
+ if (old->ntfs_loc) {
+ struct ntfs_location *loc;
+ loc = memdup(old->ntfs_loc, sizeof(struct ntfs_location));
+ if (!loc)
+ goto out_free;
+ loc->path = NULL;
+ loc->stream_name = NULL;
+ new->ntfs_loc = loc;
+ loc->path = STRDUP(old->ntfs_loc->path);
+ if (!loc->path)
+ goto out_free;
+ if (loc->stream_name_nchars) {
+ loc->stream_name = memdup(old->ntfs_loc->stream_name,
+ loc->stream_name_nchars * 2);
+ if (!loc->stream_name)
+ goto out_free;
+ }
+ }
+ break;
+#endif
+ default:
+ break;
+ }
+ return new;
+out_free:
+ free_lookup_table_entry(new);
+ return NULL;
+}
+
+void
+free_lookup_table_entry(struct wim_lookup_table_entry *lte)
+{
+ if (lte) {
switch (lte->resource_location) {
+ #ifdef __WIN32__
+ case RESOURCE_WIN32:
+ case RESOURCE_WIN32_ENCRYPTED:
+ #else
+ case RESOURCE_IN_FILE_ON_DISK:
+ #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:
- case RESOURCE_IN_FILE_ON_DISK:
- wimlib_assert(((void*)<e->file_on_disk ==
- (void*)<e->staging_file_name)
- && ((void*)<e->file_on_disk ==
- (void*)<e->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_utf8);
- FREE(lte->ntfs_loc->stream_name_utf16);
+ FREE(lte->ntfs_loc->path);
+ FREE(lte->ntfs_loc->stream_name);
FREE(lte->ntfs_loc);
}
break;
default:
break;
}
- FREE(lte->extracted_file);
FREE(lte);
}
}
-static int do_free_lookup_table_entry(struct lookup_table_entry *entry,
- void *ignore)
+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 lookup_table *table)
+void
+free_lookup_table(struct wim_lookup_table *table)
{
DEBUG2("Freeing lookup table");
if (table) {
* Inserts an entry into the lookup table.
*
* @table: A pointer to the lookup table.
- * @entry: A pointer to the entry to insert.
+ * @lte: A pointer to the entry to insert.
*/
-void lookup_table_insert(struct lookup_table *table,
- struct lookup_table_entry *lte)
+void
+lookup_table_insert(struct wim_lookup_table *table,
+ struct wim_lookup_table_entry *lte)
{
size_t i = lte->hash_short % table->capacity;
hlist_add_head(<e->hash_list, &table->array[i]);
table->num_entries++;
}
-static void finalize_lte(struct lookup_table_entry *lte)
+static void
+finalize_lte(struct wim_lookup_table_entry *lte)
{
#ifdef WITH_FUSE
- if (lte->resource_location == RESOURCE_IN_STAGING_FILE)
+ if (lte->resource_location == RESOURCE_IN_STAGING_FILE) {
unlink(lte->staging_file_name);
+ list_del(<e->unhashed_list);
+ }
#endif
free_lookup_table_entry(lte);
}
* 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 wim_lookup_table_entry *lte,
+ struct wim_lookup_table *table)
{
- if (lte) {
- wimlib_assert(lte->refcnt);
- if (--lte->refcnt == 0) {
+ 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);
- lte = NULL;
- }
- }
+ #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 wim_lookup_table_entry *lte)
{
- if (lte) {
- wimlib_assert(lte->num_opened_fds);
- if (--lte->num_opened_fds == 0 && lte->refcnt == 0) {
- lookup_table_unlink(table, lte);
+ if (lte->num_opened_fds != 0)
+ if (--lte->num_opened_fds == 0 && lte->refcnt == 0)
finalize_lte(lte);
- lte = NULL;
- }
- }
- return 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 (*visitor)(struct lookup_table_entry *, void *),
- void *arg)
+/* 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. */
+int
+for_lookup_table_entry(struct wim_lookup_table *table,
+ int (*visitor)(struct wim_lookup_table_entry *, void *),
+ void *arg)
{
- struct lookup_table_entry *lte;
+ struct wim_lookup_table_entry *lte;
struct hlist_node *pos, *tmp;
int ret;
hlist_for_each_entry_safe(lte, pos, tmp, &table->array[i],
hash_list)
{
+ wimlib_assert2(!(lte->resource_entry.flags & WIM_RESHDR_FLAG_METADATA));
ret = visitor(lte, arg);
- if (ret != 0)
+ if (ret)
return ret;
}
}
return 0;
}
+int
+cmp_streams_by_wim_position(const void *p1, const void *p2)
+{
+ const struct wim_lookup_table_entry *lte1, *lte2;
+ lte1 = *(const struct wim_lookup_table_entry**)p1;
+ lte2 = *(const struct wim_lookup_table_entry**)p2;
+ if (lte1->resource_entry.offset < lte2->resource_entry.offset)
+ return -1;
+ else if (lte1->resource_entry.offset > lte2->resource_entry.offset)
+ return 1;
+ else
+ return 0;
+}
+
+
+static int
+add_lte_to_array(struct wim_lookup_table_entry *lte,
+ void *_pp)
+{
+ struct wim_lookup_table_entry ***pp = _pp;
+ *(*pp)++ = lte;
+ return 0;
+}
+
+/* Iterate through the lookup table entries, but first sort them by stream
+ * offset in the WIM. Caution: this is intended to be used when the stream
+ * offset field has actually been set. */
+int
+for_lookup_table_entry_pos_sorted(struct wim_lookup_table *table,
+ int (*visitor)(struct wim_lookup_table_entry *,
+ void *),
+ void *arg)
+{
+ struct wim_lookup_table_entry **lte_array, **p;
+ size_t num_streams = table->num_entries;
+ int ret;
+
+ lte_array = MALLOC(num_streams * sizeof(lte_array[0]));
+ if (!lte_array)
+ return WIMLIB_ERR_NOMEM;
+ p = lte_array;
+ for_lookup_table_entry(table, add_lte_to_array, &p);
+
+ wimlib_assert(p == lte_array + num_streams);
+
+ qsort(lte_array, num_streams, sizeof(lte_array[0]),
+ cmp_streams_by_wim_position);
+ ret = 0;
+ for (size_t i = 0; i < num_streams; i++) {
+ ret = visitor(lte_array[i], arg);
+ if (ret)
+ break;
+ }
+ FREE(lte_array);
+ return ret;
+}
+
+/* On-disk format of a WIM lookup table entry (stream entry). */
+struct wim_lookup_table_entry_disk {
+ /* Location, offset, compression status, and metadata status of the
+ * stream. */
+ struct resource_entry_disk resource_entry;
+
+ /* Which part of the split WIM this stream is in; indexed from 1. */
+ u16 part_number;
+
+ /* Reference count of this stream over all WIM images. */
+ u32 refcnt;
+
+ /* SHA1 message digest of the uncompressed data of this stream, or
+ * optionally all zeroes if this stream is of zero length. */
+ u8 hash[SHA1_HASH_SIZE];
+} _packed_attribute;
/*
* Reads the lookup table from a WIM file.
+ *
+ * Saves lookup table entries for non-metadata streams in a hash table, and
+ * saves the metadata entry for each image in a special per-image location (the
+ * image_metadata array).
*/
-int read_lookup_table(WIMStruct *w)
+int
+read_lookup_table(WIMStruct *w)
{
- u64 num_entries;
- u8 buf[WIM_LOOKUP_TABLE_ENTRY_DISK_SIZE];
- int ret;
- struct lookup_table *table;
- struct lookup_table_entry *cur_entry = NULL, *duplicate_entry;
+ int ret;
+ size_t num_entries;
+ struct wim_lookup_table *table;
+ struct wim_lookup_table_entry *cur_entry, *duplicate_entry;
+ struct wim_lookup_table_entry_disk
+ table_buf[BUFFER_SIZE / sizeof(struct wim_lookup_table_entry_disk)]
+ _aligned_attribute(8);
+ off_t offset;
+ size_t buf_entries_remaining;
+ const struct wim_lookup_table_entry_disk *disk_entry;
DEBUG("Reading lookup table: offset %"PRIu64", size %"PRIu64"",
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) {
- ERROR_WITH_ERRNO("Failed to seek to byte %"PRIu64" to read "
- "lookup table",
- w->hdr.lookup_table_res_entry.offset);
- return WIMLIB_ERR_READ;
+ if (resource_is_compressed(&w->hdr.lookup_table_res_entry)) {
+ ERROR("Didn't expect a compressed lookup table!");
+ ERROR("Ask the author to implement support for this.");
+ return WIMLIB_ERR_COMPRESSED_LOOKUP_TABLE;
}
- num_entries = w->hdr.lookup_table_res_entry.original_size /
- WIM_LOOKUP_TABLE_ENTRY_DISK_SIZE;
+ num_entries = w->hdr.lookup_table_res_entry.size /
+ sizeof(struct wim_lookup_table_entry_disk);
table = new_lookup_table(num_entries * 2 + 1);
if (!table)
return WIMLIB_ERR_NOMEM;
- while (num_entries--) {
- const u8 *p;
+ w->current_image = 0;
+ offset = w->hdr.lookup_table_res_entry.offset;
+ buf_entries_remaining = 0;
+ for (; num_entries != 0;
+ num_entries--, buf_entries_remaining--, disk_entry++)
+ {
+ if (buf_entries_remaining == 0) {
+ size_t entries_to_read, bytes_to_read;
- if (fread(buf, 1, sizeof(buf), w->fp) != sizeof(buf)) {
- if (feof(w->fp)) {
- ERROR("Unexpected EOF in WIM lookup table!");
- } else {
- ERROR_WITH_ERRNO("Error reading WIM lookup "
- "table");
+ entries_to_read = min(ARRAY_LEN(table_buf), num_entries);
+ bytes_to_read = entries_to_read * sizeof(struct wim_lookup_table_entry_disk);
+ if (full_pread(w->in_fd, table_buf,
+ bytes_to_read, offset) != bytes_to_read)
+ {
+ ERROR_WITH_ERRNO("Error reading lookup table "
+ "(offset=%"PRIu64")", offset);
+ ret = WIMLIB_ERR_READ;
+ goto out_free_lookup_table;
}
- ret = WIMLIB_ERR_READ;
- goto out;
+ offset += bytes_to_read;
+ disk_entry = table_buf;
+ buf_entries_remaining = entries_to_read;
}
cur_entry = new_lookup_table_entry();
if (!cur_entry) {
ret = WIMLIB_ERR_NOMEM;
- goto out;
+ goto out_free_lookup_table;
}
+
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);
- p = get_bytes(p, SHA1_HASH_SIZE, cur_entry->hash);
+ get_resource_entry(&disk_entry->resource_entry, &cur_entry->resource_entry);
+ cur_entry->part_number = le16_to_cpu(disk_entry->part_number);
+ cur_entry->refcnt = le32_to_cpu(disk_entry->refcnt);
+ copy_hash(cur_entry->hash, disk_entry->hash);
if (cur_entry->part_number != w->hdr.part_number) {
ERROR("A lookup table entry in part %hu of the WIM "
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;
}
- duplicate_entry = __lookup_resource(table, cur_entry->hash);
- if (duplicate_entry) {
- ERROR("The WIM lookup table contains two entries with the "
- "same SHA1 message digest!");
- ERROR("The first entry is:");
- print_lookup_table_entry(duplicate_entry);
- ERROR("The second entry is:");
- print_lookup_table_entry(cur_entry);
- ret = WIMLIB_ERR_INVALID_LOOKUP_TABLE_ENTRY;
- goto out_free_cur_entry;
- }
-
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))
{
+ #ifdef ENABLE_ERROR_MESSAGES
ERROR("Found uncompressed resource with original size "
"not the same as compressed size");
ERROR("The lookup table entry for the resource is as follows:");
- print_lookup_table_entry(cur_entry);
+ print_lookup_table_entry(cur_entry, stderr);
+ #endif
ret = WIMLIB_ERR_INVALID_LOOKUP_TABLE_ENTRY;
goto out_free_cur_entry;
}
- lookup_table_insert(table, cur_entry);
+ if (cur_entry->resource_entry.flags & WIM_RESHDR_FLAG_METADATA) {
+ /* Lookup table entry for a metadata resource */
+ if (cur_entry->refcnt != 1) {
+ #ifdef ENABLE_ERROR_MESSAGES
+ ERROR("Found metadata resource with refcnt != 1:");
+ print_lookup_table_entry(cur_entry, stderr);
+ #endif
+ ret = WIMLIB_ERR_INVALID_LOOKUP_TABLE_ENTRY;
+ goto out_free_cur_entry;
+ }
+
+ if (w->hdr.part_number != 1) {
+ ERROR("Found a metadata resource in a "
+ "non-first part of the split WIM!");
+ ret = WIMLIB_ERR_INVALID_LOOKUP_TABLE_ENTRY;
+ goto out_free_cur_entry;
+ }
+ if (w->current_image == w->hdr.image_count) {
+ ERROR("The WIM header says there are %u images "
+ "in the WIM, but we found more metadata "
+ "resources than this", w->hdr.image_count);
+ ret = WIMLIB_ERR_IMAGE_COUNT;
+ goto out_free_cur_entry;
+ }
+
+ /* Notice very carefully: We are assigning the metadata
+ * resources in the exact order mirrored by their lookup
+ * table entries on disk, which is the behavior of
+ * Microsoft's software. In particular, this overrides
+ * the actual locations of the metadata resources
+ * themselves in the WIM file as well as any information
+ * written in the XML data. */
+ DEBUG("Found metadata resource for image %u at "
+ "offset %"PRIu64".",
+ w->current_image + 1,
+ cur_entry->resource_entry.offset);
+ w->image_metadata[
+ w->current_image++]->metadata_lte = cur_entry;
+ } else {
+ /* Lookup table entry for a stream that is not a
+ * metadata resource */
+ duplicate_entry = __lookup_resource(table, cur_entry->hash);
+ if (duplicate_entry) {
+ #ifdef ENABLE_ERROR_MESSAGES
+ ERROR("The WIM lookup table contains two entries with the "
+ "same SHA1 message digest!");
+ ERROR("The first entry is:");
+ print_lookup_table_entry(duplicate_entry, stderr);
+ ERROR("The second entry is:");
+ print_lookup_table_entry(cur_entry, stderr);
+ #endif
+ ret = WIMLIB_ERR_INVALID_LOOKUP_TABLE_ENTRY;
+ goto out_free_cur_entry;
+ }
+ lookup_table_insert(table, cur_entry);
+ }
+ }
+
+ if (w->hdr.part_number == 1 && w->current_image != w->hdr.image_count)
+ {
+ ERROR("The WIM header says there are %u images "
+ "in the WIM, but we only found %d metadata "
+ "resources!", w->hdr.image_count, w->current_image);
+ ret = WIMLIB_ERR_IMAGE_COUNT;
+ goto out_free_lookup_table;
}
DEBUG("Done reading lookup table.");
w->lookup_table = table;
- return 0;
+ ret = 0;
+ goto out;
out_free_cur_entry:
FREE(cur_entry);
-out:
+out_free_lookup_table:
free_lookup_table(table);
+out:
+ w->current_image = 0;
return ret;
}
-/*
- * Writes a lookup table entry to the output file.
- */
-int write_lookup_table_entry(struct lookup_table_entry *lte, void *__out)
+static void
+write_lookup_table_entry(const struct wim_lookup_table_entry *lte,
+ struct wim_lookup_table_entry_disk *disk_entry)
{
- FILE *out;
- u8 buf[WIM_LOOKUP_TABLE_ENTRY_DISK_SIZE];
- u8 *p;
+ put_resource_entry(<e->output_resource_entry, &disk_entry->resource_entry);
+ disk_entry->part_number = cpu_to_le16(lte->part_number);
+ disk_entry->refcnt = cpu_to_le32(lte->out_refcnt);
+ copy_hash(disk_entry->hash, lte->hash);
+}
- out = __out;
+int
+write_lookup_table_from_stream_list(struct list_head *stream_list,
+ int out_fd,
+ struct resource_entry *out_res_entry)
+{
+ int ret;
+ off_t start_offset;
+ struct wim_lookup_table_entry_disk
+ table_buf[BUFFER_SIZE / sizeof(struct wim_lookup_table_entry_disk)]
+ _aligned_attribute(8);
+ size_t table_size;
+ size_t bytes_to_write;
+ struct wim_lookup_table_entry *lte;
+ size_t cur_idx;
- /* Don't write entries that have not had file resources or metadata
- * resources written for them. */
- if (lte->out_refcnt == 0)
- return 0;
+ start_offset = filedes_offset(out_fd);
+ if (start_offset == -1)
+ goto write_error;
- if (lte->output_resource_entry.flags & WIM_RESHDR_FLAG_METADATA)
- DEBUG("Writing metadata entry at %lu (orig size = %zu)",
- ftello(out), lte->output_resource_entry.original_size);
-
- p = put_resource_entry(buf, <e->output_resource_entry);
- p = put_u16(p, lte->part_number);
- p = put_u32(p, lte->out_refcnt);
- p = put_bytes(p, SHA1_HASH_SIZE, lte->hash);
- if (fwrite(buf, 1, sizeof(buf), out) != sizeof(buf)) {
- ERROR_WITH_ERRNO("Failed to write lookup table entry");
- return WIMLIB_ERR_WRITE;
+ table_size = 0;
+ cur_idx = 0;
+ list_for_each_entry(lte, stream_list, lookup_table_list) {
+ if (cur_idx == ARRAY_LEN(table_buf)) {
+ bytes_to_write = sizeof(table_buf);
+ if (full_write(out_fd, table_buf,
+ bytes_to_write) != bytes_to_write)
+ goto write_error;
+ table_size += bytes_to_write;
+ cur_idx = 0;
+ }
+ write_lookup_table_entry(lte, &table_buf[cur_idx]);
+ cur_idx++;
+ }
+ if (cur_idx != 0) {
+ bytes_to_write = cur_idx * sizeof(struct wim_lookup_table_entry_disk);
+ if (full_write(out_fd, table_buf,
+ bytes_to_write) != bytes_to_write)
+ goto write_error;
+ table_size += bytes_to_write;
}
+ out_res_entry->offset = start_offset;
+ out_res_entry->size = table_size;
+ out_res_entry->original_size = table_size;
+ out_res_entry->flags = WIM_RESHDR_FLAG_METADATA;
+ ret = 0;
+out:
+ return ret;
+write_error:
+ ERROR_WITH_ERRNO("Failed to write lookup table");
+ ret = WIMLIB_ERR_WRITE;
+ goto out;
+}
+
+static int
+append_lookup_table_entry(struct wim_lookup_table_entry *lte, void *_list)
+{
+ if (lte->out_refcnt != 0)
+ list_add_tail(<e->lookup_table_list, (struct list_head*)_list);
return 0;
}
+/* Writes the WIM lookup table to the output file. */
+int
+write_lookup_table(WIMStruct *w, int image, struct resource_entry *out_res_entry)
+{
+ LIST_HEAD(stream_list);
+ int start_image;
+ int end_image;
+
+ if (image == WIMLIB_ALL_IMAGES) {
+ start_image = 1;
+ end_image = w->hdr.image_count;
+ } else {
+ start_image = image;
+ end_image = image;
+ }
+
+ for (int i = start_image; i <= end_image; i++) {
+ struct wim_lookup_table_entry *metadata_lte;
+
+ metadata_lte = w->image_metadata[i - 1]->metadata_lte;
+ metadata_lte->out_refcnt = 1;
+ metadata_lte->output_resource_entry.flags |= WIM_RESHDR_FLAG_METADATA;
+ append_lookup_table_entry(metadata_lte, &stream_list);
+ }
+ for_lookup_table_entry(w->lookup_table,
+ append_lookup_table_entry,
+ &stream_list);
+ return write_lookup_table_from_stream_list(&stream_list,
+ w->out_fd,
+ out_res_entry);
+}
+
+int
+lte_zero_real_refcnt(struct wim_lookup_table_entry *lte, void *_ignore)
+{
+ lte->real_refcnt = 0;
+ return 0;
+}
+int
+lte_zero_out_refcnt(struct wim_lookup_table_entry *lte, void *_ignore)
+{
+ lte->out_refcnt = 0;
+ return 0;
+}
-int zero_out_refcnts(struct lookup_table_entry *entry, void *ignore)
+int
+lte_free_extracted_file(struct wim_lookup_table_entry *lte, void *_ignore)
{
- entry->out_refcnt = 0;
+ if (lte->extracted_file != NULL) {
+ FREE(lte->extracted_file);
+ lte->extracted_file = NULL;
+ }
return 0;
}
-void print_lookup_table_entry(const struct lookup_table_entry *lte)
+void
+print_lookup_table_entry(const struct wim_lookup_table_entry *lte, FILE *out)
{
if (!lte) {
- putchar('\n');
+ tputc(T('\n'), out);
return;
}
- printf("Offset = %"PRIu64" bytes\n",
- lte->resource_entry.offset);
- printf("Size = %"PRIu64" bytes\n",
- (u64)lte->resource_entry.size);
- 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);
- printf("Hash = 0x");
- print_hash(lte->hash);
- putchar('\n');
- printf("Flags = ");
+ tfprintf(out, T("Offset = %"PRIu64" bytes\n"),
+ lte->resource_entry.offset);
+
+ tfprintf(out, T("Size = %"PRIu64" bytes\n"),
+ (u64)lte->resource_entry.size);
+
+ tfprintf(out, T("Original size = %"PRIu64" bytes\n"),
+ lte->resource_entry.original_size);
+
+ tfprintf(out, T("Part Number = %hu\n"), lte->part_number);
+ 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->resource_entry.flags;
if (flags & WIM_RESHDR_FLAG_COMPRESSED)
- fputs("WIM_RESHDR_FLAG_COMPRESSED, ", stdout);
+ tfputs(T("WIM_RESHDR_FLAG_COMPRESSED, "), out);
if (flags & WIM_RESHDR_FLAG_FREE)
- fputs("WIM_RESHDR_FLAG_FREE, ", stdout);
+ tfputs(T("WIM_RESHDR_FLAG_FREE, "), out);
if (flags & WIM_RESHDR_FLAG_METADATA)
- fputs("WIM_RESHDR_FLAG_METADATA, ", stdout);
+ tfputs(T("WIM_RESHDR_FLAG_METADATA, "), out);
if (flags & WIM_RESHDR_FLAG_SPANNED)
- fputs("WIM_RESHDR_FLAG_SPANNED, ", stdout);
- putchar('\n');
+ tfputs(T("WIM_RESHDR_FLAG_SPANNED, "), out);
+ tputc(T('\n'), out);
switch (lte->resource_location) {
case RESOURCE_IN_WIM:
if (lte->wim->filename) {
- printf("WIM file = `%s'\n",
- lte->wim->filename);
+ tfprintf(out, T("WIM file = `%"TS"'\n"),
+ lte->wim->filename);
}
break;
+#ifdef __WIN32__
+ case RESOURCE_WIN32:
+ case RESOURCE_WIN32_ENCRYPTED:
+#else
case RESOURCE_IN_FILE_ON_DISK:
- printf("File on Disk = `%s'\n", lte->file_on_disk);
+#endif
+ tfprintf(out, T("File on Disk = `%"TS"'\n"),
+ lte->file_on_disk);
break;
+#ifdef WITH_FUSE
case RESOURCE_IN_STAGING_FILE:
- printf("Staging File = `%s'\n", lte->staging_file_name);
+ tfprintf(out, T("Staging File = `%"TS"'\n"),
+ lte->staging_file_name);
break;
+#endif
default:
break;
}
- putchar('\n');
+ tputc(T('\n'), out);
}
-static int do_print_lookup_table_entry(struct lookup_table_entry *lte,
- void *ignore)
+static int
+do_print_lookup_table_entry(struct wim_lookup_table_entry *lte, void *fp)
{
- print_lookup_table_entry(lte);
+ print_lookup_table_entry(lte, (FILE*)fp);
return 0;
}
/*
- * Prints the lookup table of a WIM file.
+ * Prints the lookup table of a WIM file.
*/
-WIMLIBAPI void wimlib_print_lookup_table(WIMStruct *w)
+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);
+ stdout);
}
-/*
- * Looks up an entry in the lookup table.
- */
-struct lookup_table_entry *
-__lookup_resource(const struct lookup_table *table, const u8 hash[])
+/* 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_resource(const struct wim_lookup_table *table, const u8 hash[])
{
size_t i;
- struct lookup_table_entry *lte;
+ 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 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 lookup_resource(WIMStruct *w, const char *path,
- int lookup_flags,
- struct dentry **dentry_ret,
- struct lookup_table_entry **lte_ret,
- u16 *stream_idx_ret)
-{
- struct dentry *dentry;
- struct lookup_table_entry *lte;
+int
+lookup_resource(WIMStruct *w,
+ 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 char *stream_name = NULL;
- struct inode *inode;
- char *p = NULL;
+ 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 = (char*)stream_name - 1;
- *p = '\0';
+ p = (tchar*)stream_name - 1;
+ *p = T('\0');
}
}
dentry = get_dentry(w, path);
if (p)
- *p = ':';
+ *p = T(':');
if (!dentry)
- return -ENOENT;
+ return -errno;
- inode = dentry->inode;
+ inode = dentry->d_inode;
- wimlib_assert(inode->resolved);
+ wimlib_assert(inode->i_resolved);
if (!(lookup_flags & LOOKUP_FLAG_DIRECTORY_OK)
&& inode_is_directory(inode))
return -EISDIR;
if (stream_name) {
- struct ads_entry *ads_entry;
+ struct wim_ads_entry *ads_entry;
u16 ads_idx;
ads_entry = inode_get_ads_entry(inode, stream_name,
&ads_idx);
return -ENOENT;
}
} else {
- lte = inode->lte;
+ lte = inode->i_lte;
stream_idx = 0;
}
out:
*stream_idx_ret = stream_idx;
return 0;
}
+#endif
-static int inode_resolve_ltes(struct inode *inode, struct lookup_table *table)
+/*
+ * XXX Probably should store the compression type directly in the lookup table
+ * entry
+ */
+int
+wim_resource_compression_type(const struct wim_lookup_table_entry *lte)
{
- struct lookup_table_entry *lte;
-
- /* Resolve the default file stream */
- lte = __lookup_resource(table, inode->hash);
- inode->lte = lte;
- inode->resolved = true;
-
- /* Resolve the alternate data streams */
- for (u16 i = 0; i < inode->num_ads; i++) {
- struct ads_entry *cur_entry = inode->ads_entries[i];
-
- lte = __lookup_resource(table, cur_entry->hash);
- cur_entry->lte = lte;
- }
- return 0;
+ if (!(lte->resource_entry.flags & WIM_RESHDR_FLAG_COMPRESSED)
+ || lte->resource_location != RESOURCE_IN_WIM)
+ return WIMLIB_COMPRESSION_TYPE_NONE;
+ return wimlib_get_compression_type(lte->wim);
}
-/* Resolve a dentry's lookup table entries
+/* 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. A circular
* This function always succeeds; unresolved lookup table entries are given a
* NULL pointer.
*/
-int dentry_resolve_ltes(struct dentry *dentry, void *table)
+void
+inode_resolve_ltes(struct wim_inode *inode, struct wim_lookup_table *table)
{
- if (dentry->inode->resolved)
- return 0;
- else
- return inode_resolve_ltes(dentry->inode, table);
+
+ if (!inode->i_resolved) {
+ struct wim_lookup_table_entry *lte;
+ /* Resolve the default file stream */
+ lte = __lookup_resource(table, inode->i_hash);
+ inode->i_lte = lte;
+ inode->i_resolved = 1;
+
+ /* Resolve the alternate data streams */
+ for (u16 i = 0; i < inode->i_num_ads; i++) {
+ struct wim_ads_entry *cur_entry = &inode->i_ads_entries[i];
+ lte = __lookup_resource(table, cur_entry->hash);
+ cur_entry->lte = lte;
+ }
+ }
}
+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);
+}
-/* Return the lookup table entry for the unnamed data stream of a inode, or
+struct wim_lookup_table_entry *
+inode_unnamed_lte_resolved(const struct wim_inode *inode)
+{
+ 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)))
+ {
+ return inode_stream_lte_resolved(inode, i);
+ }
+ }
+ return NULL;
+}
+
+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
- * inode. So we need to check the alternate data streams too.
+ * 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 inode 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
* missing entry as an empty file or empty named data stream.
*/
-struct lookup_table_entry *
-inode_unnamed_lte(const struct inode *inode,
- const struct lookup_table *table)
+struct wim_lookup_table_entry *
+inode_unnamed_lte(const struct wim_inode *inode,
+ const struct wim_lookup_table *table)
{
- if (inode->resolved)
+ if (inode->i_resolved)
return inode_unnamed_lte_resolved(inode);
else
return inode_unnamed_lte_unresolved(inode, table);
}
+static int
+lte_add_stream_size(struct wim_lookup_table_entry *lte, void *total_bytes_p)
+{
+ *(u64*)total_bytes_p += lte->resource_entry.size;
+ return 0;
+}
+
+u64
+lookup_table_total_stream_size(struct wim_lookup_table *table)
+{
+ u64 total_size = 0;
+ for_lookup_table_entry(table, lte_add_stream_size, &total_size);
+ return total_size;
+}
+
+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;
+}
+
+/* Calculate the SHA1 message digest of a stream and move it from the list of
+ * unhashed streams to the stream lookup table, possibly joining it with an
+ * existing lookup table entry for an identical stream.
+ *
+ * @lte: An unhashed lookup table entry.
+ * @lookup_table: Lookup table for the WIM.
+ * @lte_ret: On success, write a pointer to the resulting lookup table
+ * entry to this location. This will be the same as @lte
+ * if it was inserted into the lookup table, or different if
+ * a duplicate stream was found.
+ *
+ * Returns 0 on success; nonzero if there is an error reading the stream.
+ */
+int
+hash_unhashed_stream(struct wim_lookup_table_entry *lte,
+ struct wim_lookup_table *lookup_table,
+ struct wim_lookup_table_entry **lte_ret)
+{
+ int ret;
+ struct wim_lookup_table_entry *duplicate_lte;
+ struct wim_lookup_table_entry **back_ptr;
+
+ wimlib_assert(lte->unhashed);
+
+ /* back_ptr must be saved because @back_inode and @back_stream_id are in
+ * union with the SHA1 message digest and will no longer be valid once
+ * the SHA1 has been calculated. */
+ back_ptr = retrieve_lte_pointer(lte);
+
+ ret = sha1_resource(lte);
+ if (ret)
+ return ret;
+
+ /* Look for a duplicate stream */
+ duplicate_lte = __lookup_resource(lookup_table, lte->hash);
+ list_del(<e->unhashed_list);
+ if (duplicate_lte) {
+ /* We have a duplicate stream. Transfer the reference counts
+ * from this stream to the duplicate, update the reference to
+ * this stream (in an inode or ads_entry) to point to the
+ * duplicate, then free this stream. */
+ wimlib_assert(!(duplicate_lte->unhashed));
+ duplicate_lte->refcnt += lte->refcnt;
+ duplicate_lte->out_refcnt += lte->refcnt;
+ *back_ptr = duplicate_lte;
+ free_lookup_table_entry(lte);
+ lte = duplicate_lte;
+ } else {
+ /* No duplicate stream, so we need to insert
+ * this stream into the lookup table and treat
+ * it as a hashed stream. */
+ lookup_table_insert(lookup_table, lte);
+ lte->unhashed = 0;
+ }
+ if (lte_ret)
+ *lte_ret = lte;
+ return 0;
+}
+
git://wimlib.net / wimlib / blobdiff