#include "wimlib_internal.h"
#include "lookup_table.h"
-#include "io.h"
+#include "buffer_io.h"
#include <errno.h>
#ifdef WITH_FUSE
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;
+ 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()
memcpy(new->attached_buffer, old->attached_buffer,
wim_resource_size(old));
break;
+#ifdef WITH_NTFS_3G
case RESOURCE_IN_NTFS_VOLUME:
if (old->ntfs_loc) {
struct ntfs_location *loc;
loc->stream_name_utf16_num_chars * 2);
}
break;
+#endif
+ default:
+ break;
}
return new;
out_free:
default:
break;
}
- FREE(lte->extracted_file);
FREE(lte);
}
}
void lte_decrement_refcnt(struct lookup_table_entry *lte,
struct lookup_table *table)
{
- wimlib_assert(lte);
- wimlib_assert(lte->refcnt);
+ wimlib_assert(lte != NULL);
+ wimlib_assert(lte->refcnt != 0);
if (--lte->refcnt == 0) {
lookup_table_unlink(table, lte);
#ifdef WITH_FUSE
}
#ifdef WITH_FUSE
-void 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)
{
- wimlib_assert(lte);
- wimlib_assert(lte->num_opened_fds);
- if (--lte->num_opened_fds == 0 && lte->refcnt == 0)
- finalize_lte(lte);
+ wimlib_assert(lte != NULL);
+ if (lte->num_opened_fds != 0) {
+ if (--lte->num_opened_fds == 0 && lte->refcnt == 0)
+ finalize_lte(lte);
+ }
}
#endif
*/
int read_lookup_table(WIMStruct *w)
{
- u64 num_entries;
- u8 buf[WIM_LOOKUP_TABLE_ENTRY_DISK_SIZE];
- int ret;
+ 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;
+ 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;
+ }
+
DEBUG("Reading lookup table: offset %"PRIu64", size %"PRIu64"",
w->hdr.lookup_table_res_entry.offset,
w->hdr.lookup_table_res_entry.original_size);
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:");
ret = WIMLIB_ERR_INVALID_LOOKUP_TABLE_ENTRY;
goto out_free_cur_entry;
}
+ if ((cur_entry->resource_entry.flags & WIM_RESHDR_FLAG_METADATA)
+ && cur_entry->refcnt != 1)
+ {
+ ERROR("Found metadata resource with refcnt != 1:");
+ print_lookup_table_entry(cur_entry);
+ ret = WIMLIB_ERR_INVALID_LOOKUP_TABLE_ENTRY;
+ goto out_free_cur_entry;
+ }
lookup_table_insert(table, cur_entry);
}
return 0;
}
+/* Writes the lookup table to the output file. */
+int write_lookup_table(struct lookup_table *table, FILE *out,
+ struct resource_entry *out_res_entry)
+{
+ off_t start_offset, end_offset;
+ int ret;
+
+ start_offset = ftello(out);
+ if (start_offset == -1)
+ return WIMLIB_ERR_WRITE;
+
+ ret = for_lookup_table_entry(table, write_lookup_table_entry, out);
+ if (ret != 0)
+ return ret;
+
+ end_offset = ftello(out);
+ if (end_offset == -1)
+ return WIMLIB_ERR_WRITE;
+
+ out_res_entry->offset = start_offset;
+ out_res_entry->size = end_offset - start_offset;
+ out_res_entry->original_size = end_offset - start_offset;
+ out_res_entry->flags = WIM_RESHDR_FLAG_METADATA;
+
+ return 0;
+}
+
int lte_zero_real_refcnt(struct lookup_table_entry *lte, void *ignore)
{
return 0;
}
-int lte_free_extracted_file(struct lookup_table_entry *lte, void *ignone)
+int lte_zero_extracted_file(struct lookup_table_entry *lte, void *ignore)
{
- FREE(lte->extracted_file);
lte->extracted_file = NULL;
return 0;
}
+int lte_free_extracted_file(struct lookup_table_entry *lte, void *ignore)
+{
+ 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)
{
if (!lte) {
}
#endif
-static void inode_resolve_ltes(struct inode *inode, struct lookup_table *table)
+void inode_resolve_ltes(struct inode *inode, struct lookup_table *table)
{
- struct lookup_table_entry *lte;
-
- wimlib_assert(!inode->resolved);
- /* 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;
+ if (!inode->resolved) {
+ struct lookup_table_entry *lte;
+ /* Resolve the default file stream */
+ lte = __lookup_resource(table, inode->hash);
+ inode->lte = lte;
+ inode->resolved = 1;
+
+ /* 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;
+ }
}
}
-static void inode_unresolve_ltes(struct inode *inode)
+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);
+ if (inode->resolved) {
+ if (inode->lte)
+ copy_hash(inode->hash, inode->lte->hash);
else
- zero_out_hash(inode->ads_entries[i].hash);
+ 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 = 0;
}
- inode->resolved = false;
}
/* Resolve a dentry's lookup table entries
*/
int dentry_resolve_ltes(struct dentry *dentry, void *table)
{
- if (!dentry->d_inode->resolved)
- inode_resolve_ltes(dentry->d_inode, table);
+ wimlib_assert(dentry->refcnt == 1);
+ 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);
+ inode_unresolve_ltes(dentry->d_inode);
return 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 dentries.
+ */
+struct lookup_table_entry *
+inode_stream_lte(const struct inode *inode, unsigned stream_idx,
+ const struct lookup_table *table)
+{
+ if (inode->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 an inode, or
* NULL if there is none.
*
*/
struct lookup_table_entry *
inode_unnamed_lte(const struct inode *inode,
- const struct lookup_table *table)
+ const struct lookup_table *table)
{
if (inode->resolved)
return inode_unnamed_lte_resolved(inode);
return inode_unnamed_lte_unresolved(inode, table);
}
+static int lte_add_stream_size(struct 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 lookup_table *table)
+{
+ u64 total_size = 0;
+ for_lookup_table_entry(table, lte_add_stream_size, &total_size);
+ return total_size;
+}
git://wimlib.net / wimlib / blobdiff