X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fdentry.h;h=3a3432eadbeafe36a41839235404b53b33884d2f;hp=ac4454f9e442bc014232468a42c6ba03c050bc92;hb=2a7e6a7d014689899c90a926a095a53753488967;hpb=868d370b126b2ab1f4c14fddb79d2b5ef8698964 diff --git a/src/dentry.h b/src/dentry.h index ac4454f9..3a3432ea 100644 --- a/src/dentry.h +++ b/src/dentry.h @@ -3,32 +3,38 @@ #include "util.h" #include "config.h" +#include "list.h" #include + +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 #define WIM_ADS_ENTRY_DISK_SIZE 38 -#ifndef WITH_NTFS_3G +#ifndef WIM_HASH_SIZE +#define WIM_HASH_SIZE 20 +#endif + /* * 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 IO_REPARSE_TAG_RESERVED_ZERO 0x00000000 -#define IO_REPARSE_TAG_RESERVED_ONE 0x00000001 -#define IO_REPARSE_TAG_MOUNT_POINT 0xA0000003 -#define IO_REPARSE_TAG_HSM 0xC0000004 -#define IO_REPARSE_TAG_HSM2 0x80000006 -#define IO_REPARSE_TAG_DRIVER_EXTENDER 0x80000005 -#define IO_REPARSE_TAG_SIS 0x80000007 -#define IO_REPARSE_TAG_DFS 0x8000000A -#define IO_REPARSE_TAG_DFSR 0x80000012 -#define IO_REPARSE_TAG_FILTER_MANAGER 0x8000000B -#define IO_REPARSE_TAG_SYMLINK 0xA000000C -#endif /* !WITH_NTFS_3G */ +#define WIM_IO_REPARSE_TAG_RESERVED_ZERO 0x00000000 +#define WIM_IO_REPARSE_TAG_RESERVED_ONE 0x00000001 +#define WIM_IO_REPARSE_TAG_MOUNT_POINT 0xA0000003 +#define WIM_IO_REPARSE_TAG_HSM 0xC0000004 +#define WIM_IO_REPARSE_TAG_HSM2 0x80000006 +#define WIM_IO_REPARSE_TAG_DRIVER_EXTENDER 0x80000005 +#define WIM_IO_REPARSE_TAG_SIS 0x80000007 +#define WIM_IO_REPARSE_TAG_DFS 0x8000000A +#define WIM_IO_REPARSE_TAG_DFSR 0x80000012 +#define WIM_IO_REPARSE_TAG_FILTER_MANAGER 0x8000000B +#define WIM_IO_REPARSE_TAG_SYMLINK 0xA000000C #define FILE_ATTRIBUTE_READONLY 0x00000001 #define FILE_ATTRIBUTE_HIDDEN 0x00000002 @@ -55,7 +61,7 @@ struct ads_entry { 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; @@ -70,6 +76,22 @@ static inline u64 ads_entry_length(const struct ads_entry *entry) 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) +{ + 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 directory entry. There is a directory tree for * each image in the WIM. */ struct dentry { @@ -170,17 +192,65 @@ struct dentry { /* 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 */ + int refcnt; + + /* Number of times this dentry has been opened (only for + * directories!) */ + u32 num_times_opened; + }; + + /* List of dentries in the hard link set */ + enum { + GROUP_INDEPENDENT, + GROUP_MASTER, + GROUP_SLAVE + } link_group_master_status; + struct list_head link_group_list; }; +/* Return hash of the "unnamed" (default) data stream. */ +static inline const u8 *dentry_hash(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; +} + +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; + 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 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*), @@ -192,7 +262,11 @@ extern int for_dentry_in_tree_depth(struct dentry *root, 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); @@ -208,7 +282,12 @@ 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 void dentry_free_ads_entries(struct dentry *dentry); extern void free_dentry(struct dentry *dentry); +extern void put_dentry(struct dentry *dentry); +extern int share_dentry_ads(struct dentry *master, + struct dentry *slave); +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); @@ -230,19 +309,9 @@ extern int read_dentry_tree(const u8 metadata_resource[], 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; -} static inline bool dentry_is_root(const struct dentry *dentry) { @@ -261,12 +330,22 @@ static inline bool dentry_is_only_child(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_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)