7 #include "sha1-array.h"
9 #include "thread-utils.h"
11 struct object_directory
{
12 struct object_directory
*next
;
15 * Used to store the results of readdir(3) calls when we are OK
16 * sacrificing accuracy due to races for speed. That includes
17 * object existence with OBJECT_INFO_QUICK, as well as
18 * our search for unique abbreviated hashes. Don't use it for tasks
19 * requiring greater accuracy!
21 * Be sure to call odb_load_loose_cache() before using.
23 char loose_objects_subdir_seen
[256];
24 struct oid_array loose_objects_cache
[256];
27 * Path to the alternative object store. If this is a relative path,
28 * it is relative to the current working directory.
33 void prepare_alt_odb(struct repository
*r
);
34 char *compute_alternate_path(const char *path
, struct strbuf
*err
);
35 typedef int alt_odb_fn(struct object_directory
*, void *);
36 int foreach_alt_odb(alt_odb_fn
, void*);
37 typedef void alternate_ref_fn(const struct object_id
*oid
, void *);
38 void for_each_alternate_ref(alternate_ref_fn
, void *);
41 * Add the directory to the on-disk alternates file; the new entry will also
42 * take effect in the current process.
44 void add_to_alternates_file(const char *dir
);
47 * Add the directory to the in-memory list of alternates (along with any
48 * recursive alternates it points to), but do not modify the on-disk alternates
51 void add_to_alternates_memory(const char *dir
);
54 * Populate and return the loose object cache array corresponding to the
57 struct oid_array
*odb_loose_cache(struct object_directory
*odb
,
58 const struct object_id
*oid
);
60 /* Empty the loose object cache for the specified object directory. */
61 void odb_clear_loose_cache(struct object_directory
*odb
);
64 struct hashmap_entry packmap_ent
;
65 struct packed_git
*next
;
67 struct pack_window
*windows
;
69 const void *index_data
;
72 uint32_t num_bad_objects
;
73 unsigned char *bad_object_sha1
;
77 int index
; /* for builtin/pack-objects.c */
78 unsigned pack_local
:1,
85 unsigned char hash
[GIT_MAX_RAWSZ
];
86 struct revindex_entry
*revindex
;
87 /* something like ".git/objects/pack/xxxxx.pack" */
88 char pack_name
[FLEX_ARRAY
]; /* more */
91 struct multi_pack_index
;
93 static inline int pack_map_entry_cmp(const void *unused_cmp_data
,
94 const struct hashmap_entry
*entry
,
95 const struct hashmap_entry
*entry2
,
98 const char *key
= keydata
;
99 const struct packed_git
*pg1
, *pg2
;
101 pg1
= container_of(entry
, const struct packed_git
, packmap_ent
);
102 pg2
= container_of(entry2
, const struct packed_git
, packmap_ent
);
104 return strcmp(pg1
->pack_name
, key
? key
: pg2
->pack_name
);
107 struct raw_object_store
{
109 * Set of all object directories; the main directory is first (and
110 * cannot be NULL after initialization). Subsequent directories are
113 struct object_directory
*odb
;
114 struct object_directory
**odb_tail
;
115 int loaded_alternates
;
118 * A list of alternate object directories loaded from the environment;
119 * this should not generally need to be accessed directly, but will
120 * populate the "odb" list when prepare_alt_odb() is run.
125 * Objects that should be substituted by other objects
126 * (see git-replace(1)).
128 struct oidmap
*replace_map
;
129 unsigned replace_map_initialized
: 1;
130 pthread_mutex_t replace_mutex
; /* protect object replace functions */
132 struct commit_graph
*commit_graph
;
133 unsigned commit_graph_attempted
: 1; /* if loading has been attempted */
138 * should only be accessed directly by packfile.c and midx.c
140 struct multi_pack_index
*multi_pack_index
;
145 * should only be accessed directly by packfile.c
148 struct packed_git
*packed_git
;
149 /* A most-recently-used ordered version of the packed_git list. */
150 struct list_head packed_git_mru
;
153 * A map of packfiles to packed_git structs for tracking which
154 * packs have been loaded already.
156 struct hashmap pack_map
;
159 * A fast, rough count of the number of objects in the repository.
160 * These two fields are not meant for direct access. Use
161 * approximate_object_count() instead.
163 unsigned long approximate_object_count
;
164 unsigned approximate_object_count_valid
: 1;
167 * Whether packed_git has already been populated with this repository's
170 unsigned packed_git_initialized
: 1;
173 struct raw_object_store
*raw_object_store_new(void);
174 void raw_object_store_clear(struct raw_object_store
*o
);
177 * Put in `buf` the name of the file in the local object database that
178 * would be used to store a loose object with the specified oid.
180 const char *loose_object_path(struct repository
*r
, struct strbuf
*buf
,
181 const struct object_id
*oid
);
183 void *map_loose_object(struct repository
*r
, const struct object_id
*oid
,
184 unsigned long *size
);
186 void *read_object_file_extended(struct repository
*r
,
187 const struct object_id
*oid
,
188 enum object_type
*type
,
189 unsigned long *size
, int lookup_replace
);
190 static inline void *repo_read_object_file(struct repository
*r
,
191 const struct object_id
*oid
,
192 enum object_type
*type
,
195 return read_object_file_extended(r
, oid
, type
, size
, 1);
197 #ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
198 #define read_object_file(oid, type, size) repo_read_object_file(the_repository, oid, type, size)
201 /* Read and unpack an object file into memory, write memory to an object file */
202 int oid_object_info(struct repository
*r
, const struct object_id
*, unsigned long *);
204 int hash_object_file(const void *buf
, unsigned long len
,
205 const char *type
, struct object_id
*oid
);
207 int write_object_file(const void *buf
, unsigned long len
,
208 const char *type
, struct object_id
*oid
);
210 int hash_object_file_literally(const void *buf
, unsigned long len
,
211 const char *type
, struct object_id
*oid
,
214 int pretend_object_file(void *, unsigned long, enum object_type
,
215 struct object_id
*oid
);
217 int force_object_loose(const struct object_id
*oid
, time_t mtime
);
220 * Open the loose object at path, check its hash, and return the contents,
221 * type, and size. If the object is a blob, then "contents" may return NULL,
222 * to allow streaming of large blobs.
224 * Returns 0 on success, negative on error (details may be written to stderr).
226 int read_loose_object(const char *path
,
227 const struct object_id
*expected_oid
,
228 enum object_type
*type
,
232 #ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
233 #define has_sha1_file_with_flags(sha1, flags) repo_has_sha1_file_with_flags(the_repository, sha1, flags)
234 #define has_sha1_file(sha1) repo_has_sha1_file(the_repository, sha1)
237 /* Same as the above, except for struct object_id. */
238 int repo_has_object_file(struct repository
*r
, const struct object_id
*oid
);
239 int repo_has_object_file_with_flags(struct repository
*r
,
240 const struct object_id
*oid
, int flags
);
241 #ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
242 #define has_object_file(oid) repo_has_object_file(the_repository, oid)
243 #define has_object_file_with_flags(oid, flags) repo_has_object_file_with_flags(the_repository, oid, flags)
247 * Return true iff an alternate object database has a loose object
248 * with the specified name. This function does not respect replace
251 int has_loose_object_nonlocal(const struct object_id
*);
253 void assert_oid_type(const struct object_id
*oid
, enum object_type expect
);
256 * Enabling the object read lock allows multiple threads to safely call the
257 * following functions in parallel: repo_read_object_file(), read_object_file(),
258 * read_object_file_extended(), read_object_with_reference(), read_object(),
259 * oid_object_info() and oid_object_info_extended().
261 * obj_read_lock() and obj_read_unlock() may also be used to protect other
262 * section which cannot execute in parallel with object reading. Since the used
263 * lock is a recursive mutex, these sections can even contain calls to object
264 * reading functions. However, beware that in these cases zlib inflation won't
265 * be performed in parallel, losing performance.
267 * TODO: oid_object_info_extended()'s call stack has a recursive behavior. If
268 * any of its callees end up calling it, this recursive call won't benefit from
269 * parallel inflation.
271 void enable_obj_read_lock(void);
272 void disable_obj_read_lock(void);
274 extern int obj_read_use_lock
;
275 extern pthread_mutex_t obj_read_mutex
;
277 static inline void obj_read_lock(void)
279 if(obj_read_use_lock
)
280 pthread_mutex_lock(&obj_read_mutex
);
283 static inline void obj_read_unlock(void)
285 if(obj_read_use_lock
)
286 pthread_mutex_unlock(&obj_read_mutex
);
291 enum object_type
*typep
;
292 unsigned long *sizep
;
294 unsigned char *delta_base_sha1
;
295 struct strbuf
*type_name
;
308 * ... Nothing to expose in this case
311 * ... Nothing to expose in this case
315 struct packed_git
*pack
;
317 unsigned int is_delta
;
323 * Initializer for a "struct object_info" that wants no items. You may
324 * also memset() the memory to all-zeroes.
326 #define OBJECT_INFO_INIT {NULL}
328 /* Invoke lookup_replace_object() on the given hash */
329 #define OBJECT_INFO_LOOKUP_REPLACE 1
330 /* Allow reading from a loose object file of unknown/bogus type */
331 #define OBJECT_INFO_ALLOW_UNKNOWN_TYPE 2
332 /* Do not check cached storage */
333 #define OBJECT_INFO_SKIP_CACHED 4
334 /* Do not retry packed storage after checking packed and loose storage */
335 #define OBJECT_INFO_QUICK 8
336 /* Do not check loose object */
337 #define OBJECT_INFO_IGNORE_LOOSE 16
339 * Do not attempt to fetch the object if missing (even if fetch_is_missing is
342 #define OBJECT_INFO_SKIP_FETCH_OBJECT 32
344 * This is meant for bulk prefetching of missing blobs in a partial
345 * clone. Implies OBJECT_INFO_SKIP_FETCH_OBJECT and OBJECT_INFO_QUICK
347 #define OBJECT_INFO_FOR_PREFETCH (OBJECT_INFO_SKIP_FETCH_OBJECT | OBJECT_INFO_QUICK)
349 int oid_object_info_extended(struct repository
*r
,
350 const struct object_id
*,
351 struct object_info
*, unsigned flags
);
354 * Iterate over the files in the loose-object parts of the object
355 * directory "path", triggering the following callbacks:
357 * - loose_object is called for each loose object we find.
359 * - loose_cruft is called for any files that do not appear to be
360 * loose objects. Note that we only look in the loose object
361 * directories "objects/[0-9a-f]{2}/", so we will not report
362 * "objects/foobar" as cruft.
364 * - loose_subdir is called for each top-level hashed subdirectory
365 * of the object directory (e.g., "$OBJDIR/f0"). It is called
366 * after the objects in the directory are processed.
368 * Any callback that is NULL will be ignored. Callbacks returning non-zero
369 * will end the iteration.
371 * In the "buf" variant, "path" is a strbuf which will also be used as a
372 * scratch buffer, but restored to its original contents before
373 * the function returns.
375 typedef int each_loose_object_fn(const struct object_id
*oid
,
378 typedef int each_loose_cruft_fn(const char *basename
,
381 typedef int each_loose_subdir_fn(unsigned int nr
,
384 int for_each_file_in_obj_subdir(unsigned int subdir_nr
,
386 each_loose_object_fn obj_cb
,
387 each_loose_cruft_fn cruft_cb
,
388 each_loose_subdir_fn subdir_cb
,
390 int for_each_loose_file_in_objdir(const char *path
,
391 each_loose_object_fn obj_cb
,
392 each_loose_cruft_fn cruft_cb
,
393 each_loose_subdir_fn subdir_cb
,
395 int for_each_loose_file_in_objdir_buf(struct strbuf
*path
,
396 each_loose_object_fn obj_cb
,
397 each_loose_cruft_fn cruft_cb
,
398 each_loose_subdir_fn subdir_cb
,
401 /* Flags for for_each_*_object() below. */
402 enum for_each_object_flags
{
403 /* Iterate only over local objects, not alternates. */
404 FOR_EACH_OBJECT_LOCAL_ONLY
= (1<<0),
406 /* Only iterate over packs obtained from the promisor remote. */
407 FOR_EACH_OBJECT_PROMISOR_ONLY
= (1<<1),
410 * Visit objects within a pack in packfile order rather than .idx order
412 FOR_EACH_OBJECT_PACK_ORDER
= (1<<2),
416 * Iterate over all accessible loose objects without respect to
417 * reachability. By default, this includes both local and alternate objects.
418 * The order in which objects are visited is unspecified.
420 * Any flags specific to packs are ignored.
422 int for_each_loose_object(each_loose_object_fn
, void *,
423 enum for_each_object_flags flags
);
426 * Iterate over all accessible packed objects without respect to reachability.
427 * By default, this includes both local and alternate packs.
429 * Note that some objects may appear twice if they are found in multiple packs.
430 * Each pack is visited in an unspecified order. By default, objects within a
431 * pack are visited in pack-idx order (i.e., sorted by oid).
433 typedef int each_packed_object_fn(const struct object_id
*oid
,
434 struct packed_git
*pack
,
437 int for_each_object_in_pack(struct packed_git
*p
,
438 each_packed_object_fn
, void *data
,
439 enum for_each_object_flags flags
);
440 int for_each_packed_object(each_packed_object_fn
, void *,
441 enum for_each_object_flags flags
);
443 #endif /* OBJECT_STORE_H */