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90c62155 SB |
1 | #ifndef OBJECT_STORE_H |
2 | #define OBJECT_STORE_H | |
3 | ||
ef3ca954 | 4 | #include "cache.h" |
d88f9fdf | 5 | #include "oidmap.h" |
14727b7f JT |
6 | #include "list.h" |
7 | #include "sha1-array.h" | |
8 | #include "strbuf.h" | |
d88f9fdf | 9 | |
263db403 JK |
10 | struct object_directory { |
11 | struct object_directory *next; | |
0d4a1321 | 12 | |
0d4a1321 | 13 | /* |
3a2e0824 JK |
14 | * Used to store the results of readdir(3) calls when we are OK |
15 | * sacrificing accuracy due to races for speed. That includes | |
61c7711c | 16 | * object existence with OBJECT_INFO_QUICK, as well as |
3a2e0824 JK |
17 | * our search for unique abbreviated hashes. Don't use it for tasks |
18 | * requiring greater accuracy! | |
19 | * | |
20 | * Be sure to call odb_load_loose_cache() before using. | |
0d4a1321 SB |
21 | */ |
22 | char loose_objects_subdir_seen[256]; | |
4cea1ce0 | 23 | struct oid_array loose_objects_cache[256]; |
0d4a1321 | 24 | |
77f012e8 SB |
25 | /* |
26 | * Path to the alternative object store. If this is a relative path, | |
27 | * it is relative to the current working directory. | |
28 | */ | |
f0eaf638 | 29 | char *path; |
031dc927 | 30 | }; |
f0eaf638 | 31 | |
13068bf0 | 32 | void prepare_alt_odb(struct repository *r); |
0d4a1321 | 33 | char *compute_alternate_path(const char *path, struct strbuf *err); |
263db403 | 34 | typedef int alt_odb_fn(struct object_directory *, void *); |
0d4a1321 SB |
35 | int foreach_alt_odb(alt_odb_fn, void*); |
36 | ||
0d4a1321 SB |
37 | /* |
38 | * Add the directory to the on-disk alternates file; the new entry will also | |
39 | * take effect in the current process. | |
40 | */ | |
41 | void add_to_alternates_file(const char *dir); | |
42 | ||
43 | /* | |
44 | * Add the directory to the in-memory list of alternates (along with any | |
45 | * recursive alternates it points to), but do not modify the on-disk alternates | |
46 | * file. | |
47 | */ | |
48 | void add_to_alternates_memory(const char *dir); | |
49 | ||
0000d654 RS |
50 | /* |
51 | * Populate and return the loose object cache array corresponding to the | |
52 | * given object ID. | |
53 | */ | |
54 | struct oid_array *odb_loose_cache(struct object_directory *odb, | |
55 | const struct object_id *oid); | |
56 | ||
d4e19e51 RS |
57 | /* Empty the loose object cache for the specified object directory. */ |
58 | void odb_clear_loose_cache(struct object_directory *odb); | |
59 | ||
a80d72db SB |
60 | struct packed_git { |
61 | struct packed_git *next; | |
62 | struct list_head mru; | |
63 | struct pack_window *windows; | |
64 | off_t pack_size; | |
65 | const void *index_data; | |
66 | size_t index_size; | |
67 | uint32_t num_objects; | |
68 | uint32_t num_bad_objects; | |
69 | unsigned char *bad_object_sha1; | |
70 | int index_version; | |
71 | time_t mtime; | |
72 | int pack_fd; | |
43fa44fa | 73 | int index; /* for builtin/pack-objects.c */ |
a80d72db SB |
74 | unsigned pack_local:1, |
75 | pack_keep:1, | |
ed7e5fc3 | 76 | pack_keep_in_core:1, |
a80d72db SB |
77 | freshened:1, |
78 | do_not_close:1, | |
79 | pack_promisor:1; | |
80 | unsigned char sha1[20]; | |
81 | struct revindex_entry *revindex; | |
82 | /* something like ".git/objects/pack/xxxxx.pack" */ | |
83 | char pack_name[FLEX_ARRAY]; /* more */ | |
84 | }; | |
85 | ||
4d80560c DS |
86 | struct multi_pack_index; |
87 | ||
90c62155 SB |
88 | struct raw_object_store { |
89 | /* | |
f0eaf638 JK |
90 | * Set of all object directories; the main directory is first (and |
91 | * cannot be NULL after initialization). Subsequent directories are | |
92 | * alternates. | |
90c62155 | 93 | */ |
f0eaf638 JK |
94 | struct object_directory *odb; |
95 | struct object_directory **odb_tail; | |
96 | int loaded_alternates; | |
90c62155 | 97 | |
f0eaf638 JK |
98 | /* |
99 | * A list of alternate object directories loaded from the environment; | |
100 | * this should not generally need to be accessed directly, but will | |
101 | * populate the "odb" list when prepare_alt_odb() is run. | |
102 | */ | |
90c62155 | 103 | char *alternate_db; |
031dc927 | 104 | |
d88f9fdf SB |
105 | /* |
106 | * Objects that should be substituted by other objects | |
107 | * (see git-replace(1)). | |
108 | */ | |
c1274495 | 109 | struct oidmap *replace_map; |
d88f9fdf | 110 | |
85277506 JT |
111 | struct commit_graph *commit_graph; |
112 | unsigned commit_graph_attempted : 1; /* if loading has been attempted */ | |
113 | ||
c4d25228 DS |
114 | /* |
115 | * private data | |
116 | * | |
117 | * should only be accessed directly by packfile.c and midx.c | |
118 | */ | |
119 | struct multi_pack_index *multi_pack_index; | |
120 | ||
a80d72db SB |
121 | /* |
122 | * private data | |
123 | * | |
124 | * should only be accessed directly by packfile.c | |
125 | */ | |
126 | ||
127 | struct packed_git *packed_git; | |
128 | /* A most-recently-used ordered version of the packed_git list. */ | |
129 | struct list_head packed_git_mru; | |
5508f693 | 130 | |
0bff5269 DS |
131 | /* |
132 | * A linked list containing all packfiles, starting with those | |
133 | * contained in the multi_pack_index. | |
134 | */ | |
135 | struct packed_git *all_packs; | |
136 | ||
9a00580d SB |
137 | /* |
138 | * A fast, rough count of the number of objects in the repository. | |
139 | * These two fields are not meant for direct access. Use | |
140 | * approximate_object_count() instead. | |
141 | */ | |
142 | unsigned long approximate_object_count; | |
143 | unsigned approximate_object_count_valid : 1; | |
144 | ||
5508f693 SB |
145 | /* |
146 | * Whether packed_git has already been populated with this repository's | |
147 | * packs. | |
148 | */ | |
149 | unsigned packed_git_initialized : 1; | |
90c62155 SB |
150 | }; |
151 | ||
152 | struct raw_object_store *raw_object_store_new(void); | |
153 | void raw_object_store_clear(struct raw_object_store *o); | |
154 | ||
cf78ae4f SB |
155 | /* |
156 | * Put in `buf` the name of the file in the local object database that | |
157 | * would be used to store a loose object with the specified sha1. | |
158 | */ | |
f3f043a1 | 159 | const char *loose_object_path(struct repository *r, struct strbuf *buf, const unsigned char *sha1); |
cf78ae4f | 160 | |
bd27f50c | 161 | void *map_sha1_file(struct repository *r, const unsigned char *sha1, unsigned long *size); |
e35454fa | 162 | |
a3b72c89 SB |
163 | extern void *read_object_file_extended(struct repository *r, |
164 | const struct object_id *oid, | |
cbd53a21 SB |
165 | enum object_type *type, |
166 | unsigned long *size, int lookup_replace); | |
afd69dcc SB |
167 | static inline void *repo_read_object_file(struct repository *r, |
168 | const struct object_id *oid, | |
169 | enum object_type *type, | |
170 | unsigned long *size) | |
cbd53a21 | 171 | { |
afd69dcc | 172 | return read_object_file_extended(r, oid, type, size, 1); |
cbd53a21 | 173 | } |
afd69dcc SB |
174 | #ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS |
175 | #define read_object_file(oid, type, size) repo_read_object_file(the_repository, oid, type, size) | |
176 | #endif | |
cbd53a21 SB |
177 | |
178 | /* Read and unpack an object file into memory, write memory to an object file */ | |
179 | int oid_object_info(struct repository *r, const struct object_id *, unsigned long *); | |
180 | ||
181 | extern int hash_object_file(const void *buf, unsigned long len, | |
182 | const char *type, struct object_id *oid); | |
183 | ||
184 | extern int write_object_file(const void *buf, unsigned long len, | |
185 | const char *type, struct object_id *oid); | |
186 | ||
187 | extern int hash_object_file_literally(const void *buf, unsigned long len, | |
188 | const char *type, struct object_id *oid, | |
189 | unsigned flags); | |
190 | ||
191 | extern int pretend_object_file(void *, unsigned long, enum object_type, | |
192 | struct object_id *oid); | |
193 | ||
194 | extern int force_object_loose(const struct object_id *oid, time_t mtime); | |
195 | ||
196 | /* | |
197 | * Open the loose object at path, check its hash, and return the contents, | |
198 | * type, and size. If the object is a blob, then "contents" may return NULL, | |
199 | * to allow streaming of large blobs. | |
200 | * | |
201 | * Returns 0 on success, negative on error (details may be written to stderr). | |
202 | */ | |
203 | int read_loose_object(const char *path, | |
204 | const struct object_id *expected_oid, | |
205 | enum object_type *type, | |
206 | unsigned long *size, | |
207 | void **contents); | |
208 | ||
209 | /* | |
210 | * Convenience for sha1_object_info_extended() with a NULL struct | |
211 | * object_info. OBJECT_INFO_SKIP_CACHED is automatically set; pass | |
212 | * nonzero flags to also set other flags. | |
213 | */ | |
9b45f499 SB |
214 | int repo_has_sha1_file_with_flags(struct repository *r, |
215 | const unsigned char *sha1, int flags); | |
216 | static inline int repo_has_sha1_file(struct repository *r, | |
217 | const unsigned char *sha1) | |
cbd53a21 | 218 | { |
9b45f499 | 219 | return repo_has_sha1_file_with_flags(r, sha1, 0); |
cbd53a21 SB |
220 | } |
221 | ||
9b45f499 SB |
222 | #ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS |
223 | #define has_sha1_file_with_flags(sha1, flags) repo_has_sha1_file_with_flags(the_repository, sha1, flags) | |
224 | #define has_sha1_file(sha1) repo_has_sha1_file(the_repository, sha1) | |
225 | #endif | |
226 | ||
cbd53a21 | 227 | /* Same as the above, except for struct object_id. */ |
9b45f499 SB |
228 | int repo_has_object_file(struct repository *r, const struct object_id *oid); |
229 | int repo_has_object_file_with_flags(struct repository *r, | |
230 | const struct object_id *oid, int flags); | |
231 | #ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS | |
232 | #define has_object_file(oid) repo_has_object_file(the_repository, oid) | |
233 | #define has_object_file_with_flags(oid, flags) repo_has_object_file_with_flags(the_repository, oid, flags) | |
234 | #endif | |
cbd53a21 SB |
235 | |
236 | /* | |
237 | * Return true iff an alternate object database has a loose object | |
238 | * with the specified name. This function does not respect replace | |
239 | * references. | |
240 | */ | |
b16b60f7 | 241 | extern int has_loose_object_nonlocal(const struct object_id *); |
cbd53a21 SB |
242 | |
243 | extern void assert_oid_type(const struct object_id *oid, enum object_type expect); | |
244 | ||
245 | struct object_info { | |
246 | /* Request */ | |
247 | enum object_type *typep; | |
248 | unsigned long *sizep; | |
249 | off_t *disk_sizep; | |
250 | unsigned char *delta_base_sha1; | |
251 | struct strbuf *type_name; | |
252 | void **contentp; | |
253 | ||
254 | /* Response */ | |
255 | enum { | |
256 | OI_CACHED, | |
257 | OI_LOOSE, | |
258 | OI_PACKED, | |
259 | OI_DBCACHED | |
260 | } whence; | |
261 | union { | |
262 | /* | |
263 | * struct { | |
264 | * ... Nothing to expose in this case | |
265 | * } cached; | |
266 | * struct { | |
267 | * ... Nothing to expose in this case | |
268 | * } loose; | |
269 | */ | |
270 | struct { | |
271 | struct packed_git *pack; | |
272 | off_t offset; | |
273 | unsigned int is_delta; | |
274 | } packed; | |
275 | } u; | |
276 | }; | |
277 | ||
278 | /* | |
279 | * Initializer for a "struct object_info" that wants no items. You may | |
280 | * also memset() the memory to all-zeroes. | |
281 | */ | |
282 | #define OBJECT_INFO_INIT {NULL} | |
283 | ||
284 | /* Invoke lookup_replace_object() on the given hash */ | |
285 | #define OBJECT_INFO_LOOKUP_REPLACE 1 | |
286 | /* Allow reading from a loose object file of unknown/bogus type */ | |
287 | #define OBJECT_INFO_ALLOW_UNKNOWN_TYPE 2 | |
288 | /* Do not check cached storage */ | |
289 | #define OBJECT_INFO_SKIP_CACHED 4 | |
290 | /* Do not retry packed storage after checking packed and loose storage */ | |
291 | #define OBJECT_INFO_QUICK 8 | |
292 | /* Do not check loose object */ | |
293 | #define OBJECT_INFO_IGNORE_LOOSE 16 | |
294 | ||
295 | int oid_object_info_extended(struct repository *r, | |
296 | const struct object_id *, | |
297 | struct object_info *, unsigned flags); | |
298 | ||
0889aae1 JK |
299 | /* |
300 | * Iterate over the files in the loose-object parts of the object | |
301 | * directory "path", triggering the following callbacks: | |
302 | * | |
303 | * - loose_object is called for each loose object we find. | |
304 | * | |
305 | * - loose_cruft is called for any files that do not appear to be | |
306 | * loose objects. Note that we only look in the loose object | |
307 | * directories "objects/[0-9a-f]{2}/", so we will not report | |
308 | * "objects/foobar" as cruft. | |
309 | * | |
310 | * - loose_subdir is called for each top-level hashed subdirectory | |
311 | * of the object directory (e.g., "$OBJDIR/f0"). It is called | |
312 | * after the objects in the directory are processed. | |
313 | * | |
314 | * Any callback that is NULL will be ignored. Callbacks returning non-zero | |
315 | * will end the iteration. | |
316 | * | |
317 | * In the "buf" variant, "path" is a strbuf which will also be used as a | |
318 | * scratch buffer, but restored to its original contents before | |
319 | * the function returns. | |
320 | */ | |
321 | typedef int each_loose_object_fn(const struct object_id *oid, | |
322 | const char *path, | |
323 | void *data); | |
324 | typedef int each_loose_cruft_fn(const char *basename, | |
325 | const char *path, | |
326 | void *data); | |
327 | typedef int each_loose_subdir_fn(unsigned int nr, | |
328 | const char *path, | |
329 | void *data); | |
330 | int for_each_file_in_obj_subdir(unsigned int subdir_nr, | |
331 | struct strbuf *path, | |
332 | each_loose_object_fn obj_cb, | |
333 | each_loose_cruft_fn cruft_cb, | |
334 | each_loose_subdir_fn subdir_cb, | |
335 | void *data); | |
336 | int for_each_loose_file_in_objdir(const char *path, | |
337 | each_loose_object_fn obj_cb, | |
338 | each_loose_cruft_fn cruft_cb, | |
339 | each_loose_subdir_fn subdir_cb, | |
340 | void *data); | |
341 | int for_each_loose_file_in_objdir_buf(struct strbuf *path, | |
342 | each_loose_object_fn obj_cb, | |
343 | each_loose_cruft_fn cruft_cb, | |
344 | each_loose_subdir_fn subdir_cb, | |
345 | void *data); | |
346 | ||
347 | /* Flags for for_each_*_object() below. */ | |
348 | enum for_each_object_flags { | |
349 | /* Iterate only over local objects, not alternates. */ | |
350 | FOR_EACH_OBJECT_LOCAL_ONLY = (1<<0), | |
351 | ||
352 | /* Only iterate over packs obtained from the promisor remote. */ | |
353 | FOR_EACH_OBJECT_PROMISOR_ONLY = (1<<1), | |
354 | ||
355 | /* | |
356 | * Visit objects within a pack in packfile order rather than .idx order | |
357 | */ | |
358 | FOR_EACH_OBJECT_PACK_ORDER = (1<<2), | |
359 | }; | |
360 | ||
361 | /* | |
362 | * Iterate over all accessible loose objects without respect to | |
363 | * reachability. By default, this includes both local and alternate objects. | |
364 | * The order in which objects are visited is unspecified. | |
365 | * | |
366 | * Any flags specific to packs are ignored. | |
367 | */ | |
368 | int for_each_loose_object(each_loose_object_fn, void *, | |
369 | enum for_each_object_flags flags); | |
370 | ||
371 | /* | |
372 | * Iterate over all accessible packed objects without respect to reachability. | |
373 | * By default, this includes both local and alternate packs. | |
374 | * | |
375 | * Note that some objects may appear twice if they are found in multiple packs. | |
376 | * Each pack is visited in an unspecified order. By default, objects within a | |
377 | * pack are visited in pack-idx order (i.e., sorted by oid). | |
378 | */ | |
379 | typedef int each_packed_object_fn(const struct object_id *oid, | |
380 | struct packed_git *pack, | |
381 | uint32_t pos, | |
382 | void *data); | |
383 | int for_each_object_in_pack(struct packed_git *p, | |
384 | each_packed_object_fn, void *data, | |
385 | enum for_each_object_flags flags); | |
386 | int for_each_packed_object(each_packed_object_fn, void *, | |
387 | enum for_each_object_flags flags); | |
388 | ||
90c62155 | 389 | #endif /* OBJECT_STORE_H */ |