struct stat;
struct lookup_table;
-typedef struct WIMStruct WIMStruct;
+struct WIMStruct;
/* Size of the struct dentry up to and including the file_name_len. */
#define WIM_DENTRY_DISK_SIZE 102
+/* Size of on-disk WIM alternate data stream entry, in bytes, up to and
+ * including the stream length field (see below). */
#define WIM_ADS_ENTRY_DISK_SIZE 38
+
/*
* Reparse tags documented at
* http://msdn.microsoft.com/en-us/library/dd541667(v=prot.10).aspx
struct lookup_table_entry;
-/* Alternate data stream entry */
+/* Alternate data stream entry.
+ *
+ * We read this from disk in the read_ads_entries() function; see that function
+ * for more explanation. */
struct ads_entry {
union {
/* SHA-1 message digest of stream contents */
/* Doubly linked list of streams that share the same lookup table entry */
struct stream_list_head lte_group_list;
+
+ /* Containing inode */
+ struct inode *inode;
};
-static inline u64 ads_entry_length(const struct ads_entry *entry)
+/* Returns the total length of a WIM alternate data stream entry on-disk,
+ * including the stream name, the null terminator, AND the padding after the
+ * entry to align the next one (or the next dentry) on an 8-byte boundary. */
+static inline u64 ads_entry_total_length(const struct ads_entry *entry)
{
- u64 len = WIM_ADS_ENTRY_DISK_SIZE + entry->stream_name_len + 2;
+ u64 len = WIM_ADS_ENTRY_DISK_SIZE;
+ if (entry->stream_name_len)
+ len += entry->stream_name_len + 2;
return (len + 7) & ~7;
}
-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)
{
return memcmp(entry->stream_name_utf8, name, name_len) == 0;
}
+static inline bool ads_entries_have_same_name(const struct ads_entry *entry_1,
+ const struct ads_entry *entry_2)
+{
+ if (entry_1->stream_name_len != entry_2->stream_name_len)
+ return false;
+ return memcmp(entry_1->stream_name, entry_2->stream_name,
+ entry_1->stream_name_len) == 0;
+}
-/* In-memory structure for a directory entry. There is a directory tree for
- * each image in the WIM. */
-struct dentry {
- /* The parent of this directory entry. */
- struct dentry *parent;
-
- /* Linked list of sibling directory entries. */
- struct dentry *next;
-
- struct dentry *prev;
-
- /* Pointer to a child of this directory entry. */
- struct dentry *children;
-
- /* Size of directory entry, in bytes. Typical size is around 104 to 120
- * bytes. */
- /* It is possible for the length field to be 0. This situation, which
- * is undocumented, indicates the end of a list of sibling nodes in a
- * directory. It also means the real length is 8, because the dentry
- * included only the length field, but that takes up 8 bytes. */
- u64 length;
-
- /* The file attributes associated with this file. */
- u32 attributes;
-
- /* The index of the node in the security table that contains this file's
- * security information. If -1, no security information exists for this
- * file. */
- int32_t security_id;
-
- /* The offset, from the start of the metadata section, of this directory
- * entry's child files. 0 if the directory entry has no children. */
- u64 subdir_offset;
-
- /* Timestamps for the entry. The timestamps are the number of
+struct inode {
+ /* Timestamps for the inode. The timestamps are the number of
* 100-nanosecond intervals that have elapsed since 12:00 A.M., January
- * 1st, 1601, UTC. */
+ * 1st, 1601, UTC. This is the same format used in NTFS inodes. */
u64 creation_time;
u64 last_access_time;
u64 last_write_time;
- /* 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) */
+ /* The file attributes associated with this inode. This is a bitwise OR
+ * of the FILE_ATTRIBUTE_* flags. */
+ u32 attributes;
+
+ /* The index of the security descriptor in the WIM image's table of
+ * security descriptors that contains this file's security information.
+ * If -1, no security information exists for this file. */
+ int32_t security_id;
+
+ /* %true iff the inode's lookup table entries has been resolved (i.e.
+ * the @lte field is valid, but the @hash field is not valid)
+ *
+ * (This is not an on-disk field.) */
bool resolved;
+ u16 num_ads;
+
/* 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. */
+ * opposed to the alternate (named) file streams, which may have their
+ * own lookup table entries. */
union {
u8 hash[SHA1_HASH_SIZE];
struct lookup_table_entry *lte;
* for what a reparse point is. */
u32 reparse_tag;
+ u32 link_count;
+
+ struct ads_entry **ads_entries;
+
+ /* 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.
+ *
+ * Unfortunately, in some WIMs it is NOT the case that all dentries that
+ * share this field are actually in the same hard link set, although the
+ * WIMs that wimlib writes maintain this restriction. */
+ u64 ino;
+
+ struct list_head dentry_list;
+ union {
+ struct stream_list_head lte_group_list;
+ struct hlist_node hlist;
+ };
+ char *extracted_file;
+};
+
+#define inode_for_each_dentry(dentry, inode) \
+ list_for_each_entry(dentry, &inode->dentry_list, inode_dentry_list)
+
+/*
+ * In-memory structure for a WIM directory entry (dentry). There is a directory
+ * tree for each image in the WIM.
+ *
+ * Please note that this is a directory entry and not an inode. Since NTFS
+ * allows hard links, it's possible for a NTFS inode to correspond to multiple
+ * WIM dentries. The @hard_link field tells you the number of the NTFS inode
+ * that the dentry corresponds to.
+ *
+ * Unfortunately, WIM files do not have an analogue to an inode; instead certain
+ * information, such as file attributes, the security descriptor, and file
+ * streams is replicated in each hard-linked dentry, even though this
+ * information really is associated with an inode.
+ *
+ * Confusingly, it's also possible for stream information to be missing from a
+ * dentry in a hard link set, in which case the stream information needs to be
+ * gotten from one of the other dentries in the hard link set. In addition, it
+ * is possible for dentries to have inconsistent security IDs, file attributes,
+ * or file streams when they share the same hard link ID (don't even ask. I
+ * hope that Microsoft may have fixed this problem, since I've only noticed it
+ * in the 'install.wim' for Windows 7). For those dentries, we have to use the
+ * conflicting fields to split up the hard link groups.
+ */
+struct dentry {
+ /* The parent of this directory entry. */
+ struct dentry *parent;
+
+ /* Linked list of sibling directory entries. */
+ struct dentry *next;
+ struct dentry *prev;
+
+ /* Pointer to a child of this directory entry. */
+ struct dentry *children;
+
+ struct inode *inode;
+
+ /*
+ * Size of directory entry on disk, in bytes. Typical size is around
+ * 104 to 120 bytes.
+ *
+ * It is possible for the length field to be 0. This situation, which
+ * is undocumented, indicates the end of a list of sibling nodes in a
+ * directory. It also means the real length is 8, because the dentry
+ * included only the length field, but that takes up 8 bytes.
+ *
+ * The length here includes the base directory entry on disk as well as
+ * the long and short filenames. It does NOT include any alternate
+ * stream entries that may follow the directory entry, even though the
+ * size of those needs to be considered. The length SHOULD be 8-byte
+ * aligned, although we don't require it to be. We do require the
+ * length to be large enough to hold the file name(s) of the dentry;
+ * additionally, a warning is issued if this field is larger than the
+ * aligned size.
+ */
+ u64 length;
+
+
+ /* The offset, from the start of the uncompressed WIM metadata resource
+ * for this image, of this dentry's child dentries. 0 if the directory
+ * entry has no children, which is the case for regular files or reparse
+ * points. */
+ u64 subdir_offset;
+
+
/* Although M$'s documentation does not tell you this, it seems that the
* reparse_reserved field does not actually exist. So the hard_link
* field directly follows the reparse_tag on disk. EXCEPT when the
* read_dentry() function. */
//u32 reparse_reserved;
- /* Number of alternate data streams associated with this file. */
- u16 num_ads;
/* Length of short filename, in bytes, not including the terminating
* zero wide-character. */
* the terminating zero byte. */
u16 file_name_utf8_len;
- /* Pointer to the short filename */
+ /* Pointer to the short filename (malloc()ed buffer) */
char *short_name;
- /* Pointer to the filename. */
+ /* Pointer to the filename (malloc()ed buffer). */
char *file_name;
- /* Pointer to the filename converted to UTF-8. */
+ /* Pointer to the filename converted to UTF-8 (malloc()ed buffer). */
char *file_name_utf8;
- /* Full path to this dentry. */
+ /* Full path to this dentry (malloc()ed buffer). */
char *full_path_utf8;
u32 full_path_utf8_len;
- /* Alternate stream entries for this dentry. */
- struct ads_entry *ads_entries;
-
union {
/* Number of references to the dentry tree itself, as in multiple
* WIMStructs */
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;
+ struct list_head inode_dentry_list;
+ struct list_head tmp_list;
};
-/* Return the number of dentries in the hard link group */
-static inline size_t dentry_link_group_size(const struct dentry *dentry)
-{
- 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 const char *path_stream_name(const char *path);
extern u64 dentry_total_length(const struct dentry *dentry);
+extern u64 dentry_correct_total_length(const struct dentry *dentry);
-extern void stbuf_to_dentry(const struct stat *stbuf, struct dentry *dentry);
+extern void stbuf_to_inode(const struct stat *stbuf, struct inode *inode);
extern int for_dentry_in_tree(struct dentry *root,
int (*visitor)(struct dentry*, void*),
extern int print_dentry(struct dentry *dentry, void *lookup_table);
extern int print_dentry_full_path(struct dentry *entry, void *ignore);
-extern struct dentry *get_dentry(WIMStruct *w, const char *path);
-extern struct dentry *get_parent_dentry(WIMStruct *w, const char *path);
+extern struct dentry *get_dentry(struct WIMStruct *w, const char *path);
+extern struct dentry *get_parent_dentry(struct WIMStruct *w, const char *path);
extern struct dentry *get_dentry_child_with_name(const struct dentry *dentry,
const char *name);
extern void dentry_update_all_timestamps(struct dentry *dentry);
extern void init_dentry(struct dentry *dentry, const char *name);
extern struct dentry *new_dentry(const char *name);
+extern struct inode *new_inode();
+extern struct inode *new_timeless_inode();
+extern struct dentry *new_dentry_with_inode(const char *name);
extern void dentry_free_ads_entries(struct dentry *dentry);
extern void free_dentry(struct dentry *dentry);
+extern void free_inode(struct inode *inode);
+extern void put_inode(struct inode *inode);
extern void put_dentry(struct dentry *dentry);
extern struct dentry *clone_dentry(struct dentry *old);
extern void free_dentry_tree(struct dentry *root,
extern int read_dentry(const u8 metadata_resource[], u64 metadata_resource_len,
u64 offset, struct dentry *dentry);
+extern int verify_dentry(struct dentry *dentry, void *wim);
+
extern int read_dentry_tree(const u8 metadata_resource[],
u64 metadata_resource_len, struct dentry *dentry);
extern u8 *write_dentry_tree(const struct dentry *tree, u8 *p);
-/* Inline utility functions for dentries */
+/* Return the number of dentries in the hard link group */
+static inline size_t dentry_link_group_size(const struct dentry *dentry)
+{
+ const struct list_head *cur;
+ size_t size = 0;
+ list_for_each(cur, &dentry->inode_dentry_list)
+ size++;
+ return size;
+}
static inline bool dentry_is_root(const struct dentry *dentry)
{
return dentry->next == dentry;
}
+static inline bool inode_is_directory(const struct inode *inode)
+{
+ return (inode->attributes & FILE_ATTRIBUTE_DIRECTORY)
+ && !(inode->attributes & FILE_ATTRIBUTE_REPARSE_POINT);
+}
+
static inline bool dentry_is_directory(const struct dentry *dentry)
{
- return (dentry->attributes & FILE_ATTRIBUTE_DIRECTORY)
- && !(dentry->attributes & FILE_ATTRIBUTE_REPARSE_POINT);
+ return inode_is_directory(dentry->inode);
}
/* For our purposes, we consider "real" symlinks and "junction points" to both
* be symlinks. */
+static inline bool inode_is_symlink(const struct inode *inode)
+{
+ return (inode->attributes & FILE_ATTRIBUTE_REPARSE_POINT)
+ && ((inode->reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK) ||
+ inode->reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT);
+}
+
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_MOUNT_POINT);
+ return inode_is_symlink(dentry->inode);
}
static inline bool dentry_is_regular_file(const struct dentry *dentry)
git://wimlib.net / wimlib / blobdiff