X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=src%2Flookup_table.h;h=592116bcf55d60ef082f9bd5d48caac7bc218edb;hb=13949d5667fbdc6eaa0466615d1b32a145d06ecd;hp=524e17e67ae8ec4510af14158c4682a8e9f98d18;hpb=5046b052366414f09940041ad79244c320d24751;p=wimlib diff --git a/src/lookup_table.h b/src/lookup_table.h index 524e17e6..592116bc 100644 --- a/src/lookup_table.h +++ b/src/lookup_table.h @@ -36,24 +36,60 @@ struct ntfs_location { }; #endif -/* - * An entry in the lookup table in the WIM file. +/* An enumerated type that identifies where the stream corresponding to this + * lookup table entry is actually located. * - * It is used to find data streams for files in the WIM. + * If we open a WIM and read its lookup table, the location is set to + * RESOURCE_IN_WIM since all the streams will initially be located in the WIM. + * However, to deal with problems such as image capture and image mount, we + * allow the actual location of the stream to be somewhere else, such as an + * external file. + */ +enum resource_location { + /* The lookup table entry does not correspond to a stream (this state + * should exist only temporarily) */ + RESOURCE_NONEXISTENT = 0, + + /* The stream resource is located in a WIM file. The WIMStruct for the + * WIM file will be pointed to by the @wim member. */ + RESOURCE_IN_WIM, + + /* The stream resource is located in an external file. The name of the + * file will be provided by @file_on_disk member. In addition, if + * @file_on_disk_fp is not NULL, it will be an open FILE * to the file. + * */ + RESOURCE_IN_FILE_ON_DISK, + + /* The stream resource is located in an external file in the staging + * directory for a read-write mount. */ + RESOURCE_IN_STAGING_FILE, + + /* The stream resource is directly attached in an in-memory buffer + * pointed to by @attached_buffer. */ + RESOURCE_IN_ATTACHED_BUFFER, + + /* The stream resource is located in an NTFS volume. It is identified + * by volume, filename, data stream name, and by whether it is a reparse + * point or not. @ntfs_loc points to a structure containing this + * information. */ + RESOURCE_IN_NTFS_VOLUME, +}; + +/* + * An entry in the lookup table in the WIM file. + * + * It is used to find data streams for files in the WIM. * * Metadata resources and reparse point data buffers will also have lookup table * entries associated with the data. * * The lookup_table_entry for a given dentry or alternate stream entry in the - * WIM is found using the SHA1 message digest field. + * WIM is found using the SHA1 message digest field. */ struct lookup_table_entry { /* List of lookup table entries in this hash bucket */ - union { - struct hlist_node hash_list; - struct list_head list; - }; + struct hlist_node hash_list; /* Location and size of the stream in the WIM, whether it is compressed * or not, and whether it's a metadata resource or not. This is an @@ -74,44 +110,8 @@ struct lookup_table_entry { */ u16 part_number; - /* An enumerated type that identifies where the stream corresponding to - * this lookup table entry is actually located. - * - * Obviously if we open a WIM and read its lookup table, the location is - * set to RESOURCE_IN_WIM since all the streams will initially be - * located in the WIM. However, to deal with problems such as image - * capture and image mount, we allow the actual location of the stream - * to be somewhere else, such as an external file. - */ - enum { - /* The lookup table entry does not correspond to a stream (this - * state should exist only temporarily) */ - RESOURCE_NONEXISTENT = 0, - - /* The stream resource is located in a WIM file. The WIMStruct - * for the WIM file will be pointed to by the @wim member. */ - RESOURCE_IN_WIM, - - /* The stream resource is located in an external file. The - * name of the file will be provided by @file_on_disk member. - * In addition, if @file_on_disk_fp is not NULL, it will be an - * open FILE * to the file. */ - RESOURCE_IN_FILE_ON_DISK, - - /* The stream resource is located in an external file in the - * staging directory for a read-write mount. */ - RESOURCE_IN_STAGING_FILE, - - /* The stream resource is directly attached in an in-memory - * buffer pointed to by @attached_buffer. */ - RESOURCE_IN_ATTACHED_BUFFER, - - /* The stream resource is located in an NTFS volume. It is - * identified by volume, filename, data stream name, and by - * whether it is a reparse point or not. @ntfs_loc points to a - * structure containing this information. */ - RESOURCE_IN_NTFS_VOLUME, - } resource_location; + /* See enum resource_location above */ + u16 resource_location; /* (On-disk field) * Number of times this lookup table entry is referenced by dentries. @@ -133,6 +133,10 @@ struct lookup_table_entry { size_t hash_short; }; + #ifdef WITH_FUSE + u16 num_opened_fds; + #endif + /* Pointers to somewhere where the stream is actually located. See the * comments for the @resource_location field above. */ union { @@ -160,9 +164,6 @@ struct lookup_table_entry { * RESOURCE_IN_STAGING_FILE) */ struct inode *lte_inode; }; -#ifdef WITH_FUSE - u16 num_opened_fds; -#endif /* When a WIM file is written, out_refcnt starts at 0 and is incremented * whenever the file resource pointed to by this lookup table entry @@ -173,30 +174,33 @@ struct lookup_table_entry { u32 real_refcnt; - /* When a WIM file is written, @output_resource_entry is filled - * in with the resource entry for the output WIM. This will not - * necessarily be the same as the @resource_entry since: - * - The stream may have a different offset in the new WIM - * - The stream may have a different compressed size in the - * new WIM if the compression type changed - */ - struct resource_entry output_resource_entry; + union { + /* When a WIM file is written, @output_resource_entry is filled + * in with the resource entry for the output WIM. This will not + * necessarily be the same as the @resource_entry since: - The + * stream may have a different offset in the new WIM - The + * stream may have a different compressed size in the new WIM if + * the compression type changed + */ + struct resource_entry output_resource_entry; + + struct list_head msg_list; + struct list_head inode_list; + }; + + /* List of lookup table entries that correspond to streams that have + * been extracted to the staging directory when modifying a read-write + * mounted WIM. + * + * This field is also used to make other lists of lookup table entries. + * */ + struct list_head staging_list; /* This field is used for the special hardlink or symlink image * extraction mode. In these mode, all identical files are linked * together, and @extracted_file will be set to the filename of the * first extracted file containing this stream. */ char *extracted_file; - - union { - /* List of lookup table entries that correspond to streams that have - * been extracted to the staging directory when modifying a read-write - * mounted WIM. */ - struct list_head staging_list; - - /* Temporary field for creating a singly linked list. */ - struct lookup_table_entry *next_lte_in_swm; - }; }; static inline u64 wim_resource_size(const struct lookup_table_entry *lte) @@ -204,6 +208,11 @@ static inline u64 wim_resource_size(const struct lookup_table_entry *lte) return lte->resource_entry.original_size; } +static inline u64 wim_resource_chunks(const struct lookup_table_entry *lte) +{ + return (wim_resource_size(lte) + WIM_CHUNK_SIZE - 1) / WIM_CHUNK_SIZE; +} + static inline u64 wim_resource_compressed_size(const struct lookup_table_entry *lte) { @@ -219,18 +228,18 @@ wim_resource_compression_type(const struct lookup_table_entry *lte) { if (!(lte->resource_entry.flags & WIM_RESHDR_FLAG_COMPRESSED) || lte->resource_location != RESOURCE_IN_WIM) - return WIM_COMPRESSION_TYPE_NONE; + return WIMLIB_COMPRESSION_TYPE_NONE; return wimlib_get_compression_type(lte->wim); } extern struct lookup_table *new_lookup_table(size_t capacity); -extern void lookup_table_insert(struct lookup_table *table, +extern void lookup_table_insert(struct lookup_table *table, struct lookup_table_entry *lte); /* Unlinks a lookup table entry from the table; does not free it. */ -static inline void lookup_table_unlink(struct lookup_table *table, +static inline void lookup_table_unlink(struct lookup_table *table, struct lookup_table_entry *lte) { hlist_del(<e->hash_list); @@ -242,8 +251,8 @@ extern struct lookup_table_entry *new_lookup_table_entry(); extern struct lookup_table_entry * clone_lookup_table_entry(const struct lookup_table_entry *lte); -extern int for_lookup_table_entry(struct lookup_table *table, - int (*visitor)(struct lookup_table_entry *, void *), +extern int for_lookup_table_entry(struct lookup_table *table, + int (*visitor)(struct lookup_table_entry *, void *), void *arg); extern struct lookup_table_entry * @@ -256,12 +265,14 @@ extern int lookup_resource(WIMStruct *w, const char *path, extern void lte_decrement_refcnt(struct lookup_table_entry *lte, struct lookup_table *table); -extern void lte_decrement_num_opened_fds(struct lookup_table_entry *lte, - struct lookup_table *table); +#ifdef WITH_FUSE +extern void lte_decrement_num_opened_fds(struct lookup_table_entry *lte); +#endif extern int lte_zero_out_refcnt(struct lookup_table_entry *entry, void *ignore); extern int lte_zero_real_refcnt(struct lookup_table_entry *entry, void *ignore); -extern int lte_free_extracted_file(struct lookup_table_entry *lte, void *ignone); +extern int lte_zero_extracted_file(struct lookup_table_entry *lte, void *ignore); +extern int lte_free_extracted_file(struct lookup_table_entry *lte, void *ignore); extern void print_lookup_table_entry(const struct lookup_table_entry *entry); @@ -273,22 +284,14 @@ extern int write_lookup_table_entry(struct lookup_table_entry *lte, void *__out) extern void free_lookup_table_entry(struct lookup_table_entry *lte); +extern void inode_resolve_ltes(struct inode *inode, + struct lookup_table *table); + extern int dentry_resolve_ltes(struct dentry *dentry, void *__table); extern int dentry_unresolve_ltes(struct dentry *dentry, void *ignore); -/* Writes the lookup table to the output file. */ -static inline int write_lookup_table(struct lookup_table *table, FILE *out) -{ - return for_lookup_table_entry(table, write_lookup_table_entry, out); -} - -/* Unlinks and frees an entry from a lookup table. */ -static inline void lookup_table_remove(struct lookup_table *table, - struct lookup_table_entry *lte) -{ - lookup_table_unlink(table, lte); - free_lookup_table_entry(lte); -} +int write_lookup_table(struct lookup_table *table, FILE *out, + struct resource_entry *out_res_entry); static inline struct resource_entry* wim_metadata_resource_entry(WIMStruct *w) { @@ -322,7 +325,7 @@ inode_stream_lte_unresolved(const struct inode *inode, unsigned stream_idx, inode->ads_entries[ stream_idx - 1].hash); } -/* +/* * 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. @@ -363,7 +366,7 @@ static inline const u8 *inode_stream_hash_resolved(const struct inode *inode, return zero_hash; } -/* +/* * Returns the hash 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. @@ -416,5 +419,7 @@ extern struct lookup_table_entry * inode_unnamed_lte(const struct inode *inode, const struct lookup_table *table); +extern u64 lookup_table_total_stream_size(struct lookup_table *table); + #endif