#include "util.h"
#include "config.h"
+#include "list.h"
+#include "sha1.h"
#include <string.h>
+
+struct stat;
+struct lookup_table;
+typedef struct WIMStruct WIMStruct;
+
/* Size of the struct dentry up to and including the file_name_len. */
#define WIM_DENTRY_DISK_SIZE 102
/*
* Reparse tags documented at
* http://msdn.microsoft.com/en-us/library/dd541667(v=prot.10).aspx
- *
- * IO_REPARSE_TAG_SYMLINK is the only one we really care about.
*/
#define WIM_IO_REPARSE_TAG_RESERVED_ZERO 0x00000000
#define WIM_IO_REPARSE_TAG_RESERVED_ONE 0x00000001
#define FILE_ATTRIBUTE_ENCRYPTED 0x00004000
#define FILE_ATTRIBUTE_VIRTUAL 0x00010000
+struct lookup_table_entry;
+
/* Alternate data stream entry */
struct ads_entry {
- /* SHA-1 message digest of stream contents */
- u8 hash[WIM_HASH_SIZE];
+ union {
+ /* SHA-1 message digest of stream contents */
+ u8 hash[SHA1_HASH_SIZE];
+
+ /* The corresponding lookup table entry (only for resolved
+ * streams) */
+ struct lookup_table_entry *lte;
+ };
/* Length of stream name (UTF-16) */
u16 stream_name_len;
/* Length of stream name (UTF-8) */
- u16 stream_name_len_utf8;
+ u16 stream_name_utf8_len;
/* Stream name (UTF-16) */
char *stream_name;
/* Stream name (UTF-8) */
char *stream_name_utf8;
+
+ /* Doubly linked list of streams that share the same lookup table entry */
+ struct stream_list_head lte_group_list;
};
static inline u64 ads_entry_length(const struct ads_entry *entry)
return (len + 7) & ~7;
}
-/* In-memory structure for a directory entry. There is a directory tree for
+static inline void destroy_ads_entry(struct ads_entry *entry)
+{
+ FREE(entry->stream_name);
+ FREE(entry->stream_name_utf8);
+ memset(entry, 0, sizeof(entry));
+}
+
+static inline bool ads_entry_has_name(const struct ads_entry *entry,
+ const char *name, size_t name_len)
+{
+ if (entry->stream_name_utf8_len != name_len)
+ return false;
+ return memcmp(entry->stream_name_utf8, name, name_len) == 0;
+}
+
+
+/* In-memory structure for a WIM directory entry. There is a directory tree for
* each image in the WIM. */
struct dentry {
/* The parent of this directory entry. */
* included only the length field, but that takes up 8 bytes. */
u64 length;
-
/* The file attributes associated with this file. */
u32 attributes;
* entry's child files. 0 if the directory entry has no children. */
u64 subdir_offset;
- /* Reserved for future disuse. Currently ignoring these fields. */
- u64 unused1;
- u64 unused2;
-
/* Timestamps for the entry. The timestamps are the number of
* 100-nanosecond intervals that have elapsed since 12:00 A.M., January
* 1st, 1601, UTC. */
u64 last_access_time;
u64 last_write_time;
- /* A hash of the file's contents. */
- u8 hash[WIM_HASH_SIZE];
+ /* true if the dentry's lookup table entry has been resolved (i.e. the
+ * @lte field is invalid, but the @hash field is not valid) */
+ bool resolved;
+
+ /* A hash of the file's contents, or a pointer to the lookup table entry
+ * for this dentry if the lookup table entries have been resolved.
+ *
+ * More specifically, this is for the un-named default file stream, as
+ * opposed to the alternate file streams, which may have their own
+ * lookup table entries. */
+ union {
+ u8 hash[SHA1_HASH_SIZE];
+ struct lookup_table_entry *lte;
+ };
/* Identity of a reparse point. See
* http://msdn.microsoft.com/en-us/library/windows/desktop/aa365503(v=vs.85).aspx
* read_dentry() function. */
//u32 reparse_reserved;
- /* If the reparse_reserved field existed, there would be a 4-byte gap
- * here to align hard_link on an 8-byte field. However,
- * reparse_reserved does not actually exist, so there is no gap here. */
-
- /* If the file is part of a hard link set, all the directory entries in
- * the set will share the same value for this field. */
- u64 hard_link;
-
/* Number of alternate data streams associated with this file. */
u16 num_ads;
/* Alternate stream entries for this dentry. */
struct ads_entry *ads_entries;
- /* Number of references to the dentry tree itself, as in multiple
- * WIMStructs */
- int refcnt;
+ union {
+ /* Number of references to the dentry tree itself, as in multiple
+ * WIMStructs */
+ u32 refcnt;
+
+ /* Number of times this dentry has been opened (only for
+ * directories!) */
+ u32 num_times_opened;
+ };
+
+ /* If the file is part of a hard link set, all the directory entries in
+ * the set will share the same value for this field. */
+ u64 hard_link;
+
+ enum {
+ /* This dentry is the owner of its ads_entries, although it may
+ * be in a hard link set */
+ ADS_ENTRIES_DEFAULT = 0,
+
+ /* This dentry is the owner of the ads_entries in the hard link
+ * set */
+ ADS_ENTRIES_OWNER,
+
+ /* This dentry shares its ads_entries with a dentry in the hard
+ * link set that has ADS_ENTRIES_OWNER set. */
+ ADS_ENTRIES_USER
+ } ads_entries_status;
+
+
+ /* List of dentries in the hard link set */
+ struct list_head link_group_list;
+
+ /* List of dentries sharing the same lookup table entry */
+ struct stream_list_head lte_group_list;
+
+ /* Path to extracted file on disk (used during extraction only) */
+ char *extracted_file;
};
-/* Return hash of the "unnamed" (default) data stream. */
-static inline const u8 *dentry_hash(const struct dentry *dentry)
+
+/* Return the number of dentries in the hard link group */
+static inline size_t dentry_link_group_size(const struct dentry *dentry)
{
- /* If there are alternate data streams, the dentry hash field is zeroed
- * out, and we need to find the hash in the un-named data stream (should
- * be the first one, but check them in order just in case, and fall back
- * to the dentry hash field if we can't find an unnamed data stream). */
- for (u16 i = 0; i < dentry->num_ads; i++)
- if (dentry->ads_entries[i].stream_name_len == 0)
- return dentry->ads_entries[i].hash;
- return dentry->hash;
+ const struct list_head *cur = &dentry->link_group_list;
+ size_t size = 0;
+ wimlib_assert(cur != NULL);
+ do {
+ size++;
+ cur = cur->next;
+ } while (cur != &dentry->link_group_list);
+ return size;
}
+extern struct ads_entry *dentry_get_ads_entry(struct dentry *dentry,
+ const char *stream_name);
+
+extern struct ads_entry *dentry_add_ads(struct dentry *dentry,
+ const char *stream_name);
+
+extern void dentry_remove_ads(struct dentry *dentry, struct ads_entry *entry);
+
+extern const char *path_stream_name(const char *path);
+
extern u64 dentry_total_length(const struct dentry *dentry);
extern void stbuf_to_dentry(const struct stat *stbuf, struct dentry *dentry);
-extern void dentry_to_stbuf(const struct dentry *dentry, struct stat *stbuf,
- const struct lookup_table *table);
-
extern int for_dentry_in_tree(struct dentry *root,
int (*visitor)(struct dentry*, void*),
void *args);
extern int calculate_dentry_full_path(struct dentry *dentry, void *ignore);
extern void calculate_subdir_offsets(struct dentry *dentry, u64 *subdir_offset_p);
+extern int get_names(char **name_utf16_ret, char **name_utf8_ret,
+ u16 *name_utf16_len_ret, u16 *name_utf8_len_ret,
+ const char *name);
extern int change_dentry_name(struct dentry *dentry, const char *new_name);
+extern int change_ads_name(struct ads_entry *entry, const char *new_name);
extern void unlink_dentry(struct dentry *dentry);
extern void link_dentry(struct dentry *dentry, struct dentry *parent);
extern void init_dentry(struct dentry *dentry, const char *name);
extern struct dentry *new_dentry(const char *name);
+extern void dentry_free_ads_entries(struct dentry *dentry);
extern void free_dentry(struct dentry *dentry);
+extern void put_dentry(struct dentry *dentry);
+extern struct dentry *clone_dentry(struct dentry *old);
extern void free_dentry_tree(struct dentry *root,
- struct lookup_table *lookup_table,
- bool lt_decrement_refcnt);
+ struct lookup_table *lookup_table);
extern int increment_dentry_refcnt(struct dentry *dentry, void *ignore);
extern int decrement_dentry_refcnt(struct dentry *dentry, void *ignore);
extern u8 *write_dentry_tree(const struct dentry *tree, u8 *p);
-/* Inline utility functions for WIMDentries */
-/*
- * Returns true if @dentry has the UTF-8 file name @name that has length
- * @name_len.
- */
-static inline bool dentry_has_name(const struct dentry *dentry, const char *name,
- size_t name_len)
-{
- if (dentry->file_name_utf8_len != name_len)
- return false;
- return memcmp(dentry->file_name_utf8, name, name_len) == 0;
-}
+/* Inline utility functions for dentries */
static inline bool dentry_is_root(const struct dentry *dentry)
{
static inline bool dentry_is_directory(const struct dentry *dentry)
{
- return (dentry->attributes & FILE_ATTRIBUTE_DIRECTORY) != 0;
+ return (dentry->attributes & FILE_ATTRIBUTE_DIRECTORY)
+ && !(dentry->attributes & FILE_ATTRIBUTE_REPARSE_POINT);
}
+/* For our purposes, we consider "real" symlinks and "junction points" to both
+ * be symlinks. */
static inline bool dentry_is_symlink(const struct dentry *dentry)
{
return (dentry->attributes & FILE_ATTRIBUTE_REPARSE_POINT)
- && (dentry->reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK);
+ && ((dentry->reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK) ||
+ dentry->reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT);
}
static inline bool dentry_is_regular_file(const struct dentry *dentry)
{
- return !dentry_is_directory(dentry);
+ return !dentry_is_directory(dentry) && !dentry_is_symlink(dentry);
}
static inline bool dentry_is_empty_directory(const struct dentry *dentry)
git://wimlib.net / wimlib / blobdiff