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Commit | Line | Data |
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0fcfd160 LT |
1 | /* |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | * | |
e5afd444 | 6 | * This handles basic git object files - packing, unpacking, |
0fcfd160 LT |
7 | * creation etc. |
8 | */ | |
0fcfd160 | 9 | #include "cache.h" |
b2141fc1 | 10 | #include "config.h" |
6eac50d8 | 11 | #include "string-list.h" |
697cc8ef | 12 | #include "lockfile.h" |
1f688557 | 13 | #include "delta.h" |
a733cb60 | 14 | #include "pack.h" |
8e440259 PE |
15 | #include "blob.h" |
16 | #include "commit.h" | |
4dd1fbc7 | 17 | #include "run-command.h" |
8e440259 PE |
18 | #include "tag.h" |
19 | #include "tree.h" | |
c879daa2 | 20 | #include "tree-walk.h" |
f35a6d3b | 21 | #include "refs.h" |
70f5d5d3 | 22 | #include "pack-revindex.h" |
bc626927 | 23 | #include "hash-lookup.h" |
568508e7 | 24 | #include "bulk-checkin.h" |
031dc927 | 25 | #include "repository.h" |
47f351e9 | 26 | #include "replace-object.h" |
090ea126 | 27 | #include "streaming.h" |
543c5caa | 28 | #include "dir.h" |
12d95ef6 | 29 | #include "list.h" |
c4c6effa | 30 | #include "mergesort.h" |
cf3c6352 | 31 | #include "quote.h" |
4f39cd82 | 32 | #include "packfile.h" |
90c62155 | 33 | #include "object-store.h" |
b14ed5ad | 34 | #include "promisor-remote.h" |
a35e03de | 35 | #include "submodule.h" |
e05db0fd | 36 | |
1af64f73 | 37 | /* The maximum size for an object header. */ |
38 | #define MAX_HEADER_LEN 32 | |
39 | ||
e1ccd7e2 | 40 | |
41 | #define EMPTY_TREE_SHA1_BIN_LITERAL \ | |
42 | "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ | |
43 | "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" | |
13eeedb5 | 44 | #define EMPTY_TREE_SHA256_BIN_LITERAL \ |
45 | "\x6e\xf1\x9b\x41\x22\x5c\x53\x69\xf1\xc1" \ | |
46 | "\x04\xd4\x5d\x8d\x85\xef\xa9\xb0\x57\xb5" \ | |
47 | "\x3b\x14\xb4\xb9\xb9\x39\xdd\x74\xde\xcc" \ | |
48 | "\x53\x21" | |
e1ccd7e2 | 49 | |
50 | #define EMPTY_BLOB_SHA1_BIN_LITERAL \ | |
51 | "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ | |
52 | "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" | |
13eeedb5 | 53 | #define EMPTY_BLOB_SHA256_BIN_LITERAL \ |
54 | "\x47\x3a\x0f\x4c\x3b\xe8\xa9\x36\x81\xa2" \ | |
55 | "\x67\xe3\xb1\xe9\xa7\xdc\xda\x11\x85\x43" \ | |
56 | "\x6f\xe1\x41\xf7\x74\x91\x20\xa3\x03\x72" \ | |
57 | "\x18\x13" | |
e1ccd7e2 | 58 | |
e1ccd7e2 | 59 | static const struct object_id empty_tree_oid = { |
5a6dce70 | 60 | .hash = EMPTY_TREE_SHA1_BIN_LITERAL, |
61 | .algo = GIT_HASH_SHA1, | |
8576fde6 | 62 | }; |
e1ccd7e2 | 63 | static const struct object_id empty_blob_oid = { |
5a6dce70 | 64 | .hash = EMPTY_BLOB_SHA1_BIN_LITERAL, |
65 | .algo = GIT_HASH_SHA1, | |
8576fde6 | 66 | }; |
14228447 | 67 | static const struct object_id null_oid_sha1 = { |
68 | .hash = {0}, | |
69 | .algo = GIT_HASH_SHA1, | |
70 | }; | |
13eeedb5 | 71 | static const struct object_id empty_tree_oid_sha256 = { |
5a6dce70 | 72 | .hash = EMPTY_TREE_SHA256_BIN_LITERAL, |
73 | .algo = GIT_HASH_SHA256, | |
13eeedb5 | 74 | }; |
75 | static const struct object_id empty_blob_oid_sha256 = { | |
5a6dce70 | 76 | .hash = EMPTY_BLOB_SHA256_BIN_LITERAL, |
77 | .algo = GIT_HASH_SHA256, | |
13eeedb5 | 78 | }; |
14228447 | 79 | static const struct object_id null_oid_sha256 = { |
80 | .hash = {0}, | |
81 | .algo = GIT_HASH_SHA256, | |
82 | }; | |
88cd621d | 83 | |
ac73cedf | 84 | static void git_hash_sha1_init(git_hash_ctx *ctx) |
f50e766b | 85 | { |
ac73cedf | 86 | git_SHA1_Init(&ctx->sha1); |
f50e766b | 87 | } |
88 | ||
768e30ea | 89 | static void git_hash_sha1_clone(git_hash_ctx *dst, const git_hash_ctx *src) |
90 | { | |
91 | git_SHA1_Clone(&dst->sha1, &src->sha1); | |
92 | } | |
93 | ||
ac73cedf | 94 | static void git_hash_sha1_update(git_hash_ctx *ctx, const void *data, size_t len) |
f50e766b | 95 | { |
ac73cedf | 96 | git_SHA1_Update(&ctx->sha1, data, len); |
f50e766b | 97 | } |
98 | ||
ac73cedf | 99 | static void git_hash_sha1_final(unsigned char *hash, git_hash_ctx *ctx) |
f50e766b | 100 | { |
ac73cedf | 101 | git_SHA1_Final(hash, &ctx->sha1); |
f50e766b | 102 | } |
103 | ||
ab795f0d | 104 | static void git_hash_sha1_final_oid(struct object_id *oid, git_hash_ctx *ctx) |
105 | { | |
106 | git_SHA1_Final(oid->hash, &ctx->sha1); | |
107 | memset(oid->hash + GIT_SHA1_RAWSZ, 0, GIT_MAX_RAWSZ - GIT_SHA1_RAWSZ); | |
5a6dce70 | 108 | oid->algo = GIT_HASH_SHA1; |
ab795f0d | 109 | } |
110 | ||
13eeedb5 | 111 | |
112 | static void git_hash_sha256_init(git_hash_ctx *ctx) | |
113 | { | |
114 | git_SHA256_Init(&ctx->sha256); | |
115 | } | |
116 | ||
768e30ea | 117 | static void git_hash_sha256_clone(git_hash_ctx *dst, const git_hash_ctx *src) |
118 | { | |
119 | git_SHA256_Clone(&dst->sha256, &src->sha256); | |
120 | } | |
121 | ||
13eeedb5 | 122 | static void git_hash_sha256_update(git_hash_ctx *ctx, const void *data, size_t len) |
123 | { | |
124 | git_SHA256_Update(&ctx->sha256, data, len); | |
125 | } | |
126 | ||
127 | static void git_hash_sha256_final(unsigned char *hash, git_hash_ctx *ctx) | |
128 | { | |
129 | git_SHA256_Final(hash, &ctx->sha256); | |
130 | } | |
131 | ||
ab795f0d | 132 | static void git_hash_sha256_final_oid(struct object_id *oid, git_hash_ctx *ctx) |
133 | { | |
134 | git_SHA256_Final(oid->hash, &ctx->sha256); | |
135 | /* | |
136 | * This currently does nothing, so the compiler should optimize it out, | |
137 | * but keep it in case we extend the hash size again. | |
138 | */ | |
139 | memset(oid->hash + GIT_SHA256_RAWSZ, 0, GIT_MAX_RAWSZ - GIT_SHA256_RAWSZ); | |
5a6dce70 | 140 | oid->algo = GIT_HASH_SHA256; |
ab795f0d | 141 | } |
142 | ||
ac73cedf | 143 | static void git_hash_unknown_init(git_hash_ctx *ctx) |
f50e766b | 144 | { |
1a07e59c | 145 | BUG("trying to init unknown hash"); |
f50e766b | 146 | } |
147 | ||
768e30ea | 148 | static void git_hash_unknown_clone(git_hash_ctx *dst, const git_hash_ctx *src) |
149 | { | |
150 | BUG("trying to clone unknown hash"); | |
151 | } | |
152 | ||
ac73cedf | 153 | static void git_hash_unknown_update(git_hash_ctx *ctx, const void *data, size_t len) |
f50e766b | 154 | { |
1a07e59c | 155 | BUG("trying to update unknown hash"); |
f50e766b | 156 | } |
157 | ||
ac73cedf | 158 | static void git_hash_unknown_final(unsigned char *hash, git_hash_ctx *ctx) |
f50e766b | 159 | { |
1a07e59c | 160 | BUG("trying to finalize unknown hash"); |
f50e766b | 161 | } |
162 | ||
ab795f0d | 163 | static void git_hash_unknown_final_oid(struct object_id *oid, git_hash_ctx *ctx) |
164 | { | |
165 | BUG("trying to finalize unknown hash"); | |
166 | } | |
167 | ||
f50e766b | 168 | const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = { |
169 | { | |
0cb9872e ÆAB |
170 | .name = NULL, |
171 | .format_id = 0x00000000, | |
172 | .rawsz = 0, | |
173 | .hexsz = 0, | |
174 | .blksz = 0, | |
175 | .init_fn = git_hash_unknown_init, | |
176 | .clone_fn = git_hash_unknown_clone, | |
177 | .update_fn = git_hash_unknown_update, | |
178 | .final_fn = git_hash_unknown_final, | |
179 | .final_oid_fn = git_hash_unknown_final_oid, | |
180 | .empty_tree = NULL, | |
181 | .empty_blob = NULL, | |
182 | .null_oid = NULL, | |
f50e766b | 183 | }, |
184 | { | |
0cb9872e ÆAB |
185 | .name = "sha1", |
186 | .format_id = GIT_SHA1_FORMAT_ID, | |
187 | .rawsz = GIT_SHA1_RAWSZ, | |
188 | .hexsz = GIT_SHA1_HEXSZ, | |
189 | .blksz = GIT_SHA1_BLKSZ, | |
190 | .init_fn = git_hash_sha1_init, | |
191 | .clone_fn = git_hash_sha1_clone, | |
192 | .update_fn = git_hash_sha1_update, | |
193 | .final_fn = git_hash_sha1_final, | |
194 | .final_oid_fn = git_hash_sha1_final_oid, | |
195 | .empty_tree = &empty_tree_oid, | |
196 | .empty_blob = &empty_blob_oid, | |
197 | .null_oid = &null_oid_sha1, | |
f50e766b | 198 | }, |
13eeedb5 | 199 | { |
0cb9872e ÆAB |
200 | .name = "sha256", |
201 | .format_id = GIT_SHA256_FORMAT_ID, | |
202 | .rawsz = GIT_SHA256_RAWSZ, | |
203 | .hexsz = GIT_SHA256_HEXSZ, | |
204 | .blksz = GIT_SHA256_BLKSZ, | |
205 | .init_fn = git_hash_sha256_init, | |
206 | .clone_fn = git_hash_sha256_clone, | |
207 | .update_fn = git_hash_sha256_update, | |
208 | .final_fn = git_hash_sha256_final, | |
209 | .final_oid_fn = git_hash_sha256_final_oid, | |
210 | .empty_tree = &empty_tree_oid_sha256, | |
211 | .empty_blob = &empty_blob_oid_sha256, | |
212 | .null_oid = &null_oid_sha256, | |
13eeedb5 | 213 | } |
f50e766b | 214 | }; |
215 | ||
14228447 | 216 | const struct object_id *null_oid(void) |
217 | { | |
218 | return the_hash_algo->null_oid; | |
219 | } | |
220 | ||
d8a92ced | 221 | const char *empty_tree_oid_hex(void) |
222 | { | |
223 | static char buf[GIT_MAX_HEXSZ + 1]; | |
224 | return oid_to_hex_r(buf, the_hash_algo->empty_tree); | |
225 | } | |
226 | ||
227 | const char *empty_blob_oid_hex(void) | |
228 | { | |
229 | static char buf[GIT_MAX_HEXSZ + 1]; | |
230 | return oid_to_hex_r(buf, the_hash_algo->empty_blob); | |
231 | } | |
232 | ||
2f90b9d9 | 233 | int hash_algo_by_name(const char *name) |
234 | { | |
235 | int i; | |
236 | if (!name) | |
237 | return GIT_HASH_UNKNOWN; | |
238 | for (i = 1; i < GIT_HASH_NALGOS; i++) | |
239 | if (!strcmp(name, hash_algos[i].name)) | |
240 | return i; | |
241 | return GIT_HASH_UNKNOWN; | |
242 | } | |
243 | ||
244 | int hash_algo_by_id(uint32_t format_id) | |
245 | { | |
246 | int i; | |
247 | for (i = 1; i < GIT_HASH_NALGOS; i++) | |
248 | if (format_id == hash_algos[i].format_id) | |
249 | return i; | |
250 | return GIT_HASH_UNKNOWN; | |
251 | } | |
252 | ||
95399788 | 253 | int hash_algo_by_length(int len) |
254 | { | |
255 | int i; | |
256 | for (i = 1; i < GIT_HASH_NALGOS; i++) | |
257 | if (len == hash_algos[i].rawsz) | |
258 | return i; | |
259 | return GIT_HASH_UNKNOWN; | |
260 | } | |
2f90b9d9 | 261 | |
c597ba80 NTND |
262 | /* |
263 | * This is meant to hold a *small* number of objects that you would | |
cb1c8d1d | 264 | * want read_object_file() to be able to return, but yet you do not want |
c597ba80 NTND |
265 | * to write them into the object store (e.g. a browse-only |
266 | * application). | |
267 | */ | |
268 | static struct cached_object { | |
62ba93ea | 269 | struct object_id oid; |
c597ba80 NTND |
270 | enum object_type type; |
271 | void *buf; | |
272 | unsigned long size; | |
273 | } *cached_objects; | |
274 | static int cached_object_nr, cached_object_alloc; | |
275 | ||
276 | static struct cached_object empty_tree = { | |
62ba93ea | 277 | { EMPTY_TREE_SHA1_BIN_LITERAL }, |
c597ba80 NTND |
278 | OBJ_TREE, |
279 | "", | |
280 | 0 | |
281 | }; | |
282 | ||
62ba93ea | 283 | static struct cached_object *find_cached_object(const struct object_id *oid) |
c597ba80 NTND |
284 | { |
285 | int i; | |
286 | struct cached_object *co = cached_objects; | |
287 | ||
288 | for (i = 0; i < cached_object_nr; i++, co++) { | |
4a7e27e9 | 289 | if (oideq(&co->oid, oid)) |
c597ba80 NTND |
290 | return co; |
291 | } | |
4a7e27e9 | 292 | if (oideq(oid, the_hash_algo->empty_tree)) |
c597ba80 NTND |
293 | return &empty_tree; |
294 | return NULL; | |
295 | } | |
296 | ||
9472935d | 297 | |
8462ff43 | 298 | static int get_conv_flags(unsigned flags) |
9472935d TB |
299 | { |
300 | if (flags & HASH_RENORMALIZE) | |
8462ff43 | 301 | return CONV_EOL_RENORMALIZE; |
9472935d | 302 | else if (flags & HASH_WRITE_OBJECT) |
107642fe | 303 | return global_conv_flags_eol | CONV_WRITE_OBJECT; |
9472935d | 304 | else |
8462ff43 | 305 | return 0; |
9472935d TB |
306 | } |
307 | ||
308 | ||
90a6464b JH |
309 | int mkdir_in_gitdir(const char *path) |
310 | { | |
311 | if (mkdir(path, 0777)) { | |
312 | int saved_errno = errno; | |
313 | struct stat st; | |
314 | struct strbuf sb = STRBUF_INIT; | |
315 | ||
316 | if (errno != EEXIST) | |
317 | return -1; | |
318 | /* | |
319 | * Are we looking at a path in a symlinked worktree | |
320 | * whose original repository does not yet have it? | |
321 | * e.g. .git/rr-cache pointing at its original | |
322 | * repository in which the user hasn't performed any | |
323 | * conflict resolution yet? | |
324 | */ | |
325 | if (lstat(path, &st) || !S_ISLNK(st.st_mode) || | |
326 | strbuf_readlink(&sb, path, st.st_size) || | |
327 | !is_absolute_path(sb.buf) || | |
328 | mkdir(sb.buf, 0777)) { | |
329 | strbuf_release(&sb); | |
330 | errno = saved_errno; | |
331 | return -1; | |
332 | } | |
333 | strbuf_release(&sb); | |
334 | } | |
335 | return adjust_shared_perm(path); | |
336 | } | |
337 | ||
eb3c027e | 338 | static enum scld_error safe_create_leading_directories_1(char *path, int share) |
b2cb9425 | 339 | { |
26c8ae2a | 340 | char *next_component = path + offset_1st_component(path); |
0be0521b | 341 | enum scld_error ret = SCLD_OK; |
67d42212 | 342 | |
0be0521b | 343 | while (ret == SCLD_OK && next_component) { |
f0502332 | 344 | struct stat st; |
0f527403 | 345 | char *slash = next_component, slash_character; |
f0502332 | 346 | |
0f527403 MH |
347 | while (*slash && !is_dir_sep(*slash)) |
348 | slash++; | |
349 | ||
350 | if (!*slash) | |
b2cb9425 | 351 | break; |
bf10cf70 | 352 | |
26c8ae2a | 353 | next_component = slash + 1; |
0f527403 | 354 | while (is_dir_sep(*next_component)) |
bf10cf70 | 355 | next_component++; |
26c8ae2a | 356 | if (!*next_component) |
5f0bdf50 | 357 | break; |
831651fd | 358 | |
0f527403 | 359 | slash_character = *slash; |
831651fd | 360 | *slash = '\0'; |
67d42212 JR |
361 | if (!stat(path, &st)) { |
362 | /* path exists */ | |
204a047f MH |
363 | if (!S_ISDIR(st.st_mode)) { |
364 | errno = ENOTDIR; | |
0be0521b | 365 | ret = SCLD_EXISTS; |
204a047f | 366 | } |
53a39721 | 367 | } else if (mkdir(path, 0777)) { |
928734d9 | 368 | if (errno == EEXIST && |
9e6f885d | 369 | !stat(path, &st) && S_ISDIR(st.st_mode)) |
928734d9 | 370 | ; /* somebody created it since we checked */ |
18d37e86 MH |
371 | else if (errno == ENOENT) |
372 | /* | |
373 | * Either mkdir() failed because | |
374 | * somebody just pruned the containing | |
375 | * directory, or stat() failed because | |
376 | * the file that was in our way was | |
377 | * just removed. Either way, inform | |
378 | * the caller that it might be worth | |
379 | * trying again: | |
380 | */ | |
381 | ret = SCLD_VANISHED; | |
9e6f885d | 382 | else |
0be0521b | 383 | ret = SCLD_FAILED; |
eb3c027e | 384 | } else if (share && adjust_shared_perm(path)) { |
0be0521b | 385 | ret = SCLD_PERMS; |
457f06d6 | 386 | } |
0f527403 | 387 | *slash = slash_character; |
b2cb9425 | 388 | } |
9e6f885d | 389 | return ret; |
b2cb9425 | 390 | } |
723c31fe | 391 | |
eb3c027e MT |
392 | enum scld_error safe_create_leading_directories(char *path) |
393 | { | |
394 | return safe_create_leading_directories_1(path, 1); | |
395 | } | |
396 | ||
397 | enum scld_error safe_create_leading_directories_no_share(char *path) | |
398 | { | |
399 | return safe_create_leading_directories_1(path, 0); | |
400 | } | |
401 | ||
0be0521b | 402 | enum scld_error safe_create_leading_directories_const(const char *path) |
8e21d63b | 403 | { |
02944307 | 404 | int save_errno; |
8e21d63b JK |
405 | /* path points to cache entries, so xstrdup before messing with it */ |
406 | char *buf = xstrdup(path); | |
0be0521b | 407 | enum scld_error result = safe_create_leading_directories(buf); |
02944307 MH |
408 | |
409 | save_errno = errno; | |
8e21d63b | 410 | free(buf); |
02944307 | 411 | errno = save_errno; |
8e21d63b JK |
412 | return result; |
413 | } | |
414 | ||
514c5fdd | 415 | static void fill_loose_path(struct strbuf *buf, const struct object_id *oid) |
ace1534d JH |
416 | { |
417 | int i; | |
94b5e093 | 418 | for (i = 0; i < the_hash_algo->rawsz; i++) { |
ace1534d | 419 | static char hex[] = "0123456789abcdef"; |
514c5fdd | 420 | unsigned int val = oid->hash[i]; |
f7b7774f JK |
421 | strbuf_addch(buf, hex[val >> 4]); |
422 | strbuf_addch(buf, hex[val & 0xf]); | |
afbba2f0 | 423 | if (!i) |
f7b7774f | 424 | strbuf_addch(buf, '/'); |
ace1534d JH |
425 | } |
426 | } | |
427 | ||
f0eaf638 JK |
428 | static const char *odb_loose_path(struct object_directory *odb, |
429 | struct strbuf *buf, | |
514c5fdd | 430 | const struct object_id *oid) |
0fcfd160 | 431 | { |
b69fb867 | 432 | strbuf_reset(buf); |
f0eaf638 | 433 | strbuf_addstr(buf, odb->path); |
34498471 | 434 | strbuf_addch(buf, '/'); |
514c5fdd | 435 | fill_loose_path(buf, oid); |
f3f043a1 | 436 | return buf->buf; |
0fcfd160 LT |
437 | } |
438 | ||
f3f043a1 | 439 | const char *loose_object_path(struct repository *r, struct strbuf *buf, |
514c5fdd | 440 | const struct object_id *oid) |
29ec6af2 | 441 | { |
514c5fdd | 442 | return odb_loose_path(r->objects->odb, buf, oid); |
0fcfd160 LT |
443 | } |
444 | ||
4ea82473 JK |
445 | /* |
446 | * Return non-zero iff the path is usable as an alternate object database. | |
447 | */ | |
13313fc3 SB |
448 | static int alt_odb_usable(struct raw_object_store *o, |
449 | struct strbuf *path, | |
cf2dc1c2 | 450 | const char *normalized_objdir, khiter_t *pos) |
4ea82473 | 451 | { |
cf2dc1c2 | 452 | int r; |
4ea82473 JK |
453 | |
454 | /* Detect cases where alternate disappeared */ | |
455 | if (!is_directory(path->buf)) { | |
259328b7 NTND |
456 | error(_("object directory %s does not exist; " |
457 | "check .git/objects/info/alternates"), | |
4ea82473 JK |
458 | path->buf); |
459 | return 0; | |
460 | } | |
461 | ||
462 | /* | |
463 | * Prevent the common mistake of listing the same | |
464 | * thing twice, or object directory itself. | |
465 | */ | |
cf2dc1c2 EW |
466 | if (!o->odb_by_path) { |
467 | khiter_t p; | |
468 | ||
469 | o->odb_by_path = kh_init_odb_path_map(); | |
470 | assert(!o->odb->next); | |
471 | p = kh_put_odb_path_map(o->odb_by_path, o->odb->path, &r); | |
472 | assert(r == 1); /* never used */ | |
473 | kh_value(o->odb_by_path, p) = o->odb; | |
4ea82473 | 474 | } |
cf2dc1c2 | 475 | if (fspatheq(path->buf, normalized_objdir)) |
4ea82473 | 476 | return 0; |
cf2dc1c2 EW |
477 | *pos = kh_put_odb_path_map(o->odb_by_path, path->buf, &r); |
478 | /* r: 0 = exists, 1 = never used, 2 = deleted */ | |
479 | return r == 0 ? 0 : 1; | |
4ea82473 JK |
480 | } |
481 | ||
ddd5d056 JH |
482 | /* |
483 | * Prepare alternate object database registry. | |
d5a63b99 JH |
484 | * |
485 | * The variable alt_odb_list points at the list of struct | |
263db403 | 486 | * object_directory. The elements on this list come from |
d5a63b99 JH |
487 | * non-empty elements from colon separated ALTERNATE_DB_ENVIRONMENT |
488 | * environment variable, and $GIT_OBJECT_DIRECTORY/info/alternates, | |
1494e038 JH |
489 | * whose contents is similar to that environment variable but can be |
490 | * LF separated. Its base points at a statically allocated buffer that | |
d5a63b99 JH |
491 | * contains "/the/directory/corresponding/to/.git/objects/...", while |
492 | * its name points just after the slash at the end of ".git/objects/" | |
e5afd444 MÅ |
493 | * in the example above, and has enough space to hold all hex characters |
494 | * of the object ID, an extra slash for the first level indirection, and | |
495 | * the terminating NUL. | |
ddd5d056 | 496 | */ |
77f012e8 SB |
497 | static void read_info_alternates(struct repository *r, |
498 | const char *relative_base, | |
499 | int depth); | |
407532f8 | 500 | static int link_alt_odb_entry(struct repository *r, const struct strbuf *entry, |
cfc62fc9 | 501 | const char *relative_base, int depth, const char *normalized_objdir) |
ace1534d | 502 | { |
263db403 | 503 | struct object_directory *ent; |
5bdf0a84 | 504 | struct strbuf pathbuf = STRBUF_INIT; |
cf2dc1c2 | 505 | khiter_t pos; |
d5a63b99 | 506 | |
407532f8 | 507 | if (!is_absolute_path(entry->buf) && relative_base) { |
4ac9006f | 508 | strbuf_realpath(&pathbuf, relative_base, 1); |
5bdf0a84 | 509 | strbuf_addch(&pathbuf, '/'); |
c2f493a4 | 510 | } |
407532f8 | 511 | strbuf_addbuf(&pathbuf, entry); |
c2f493a4 | 512 | |
37a95862 | 513 | if (strbuf_normalize_path(&pathbuf) < 0 && relative_base) { |
259328b7 | 514 | error(_("unable to normalize alternate object path: %s"), |
670c359d JK |
515 | pathbuf.buf); |
516 | strbuf_release(&pathbuf); | |
517 | return -1; | |
518 | } | |
5bdf0a84 HW |
519 | |
520 | /* | |
521 | * The trailing slash after the directory name is given by | |
522 | * this function at the end. Remove duplicates. | |
523 | */ | |
4ea82473 JK |
524 | while (pathbuf.len && pathbuf.buf[pathbuf.len - 1] == '/') |
525 | strbuf_setlen(&pathbuf, pathbuf.len - 1); | |
5bdf0a84 | 526 | |
cf2dc1c2 | 527 | if (!alt_odb_usable(r->objects, &pathbuf, normalized_objdir, &pos)) { |
4ea82473 | 528 | strbuf_release(&pathbuf); |
c2f493a4 MW |
529 | return -1; |
530 | } | |
531 | ||
ca56dadb | 532 | CALLOC_ARRAY(ent, 1); |
cf2dc1c2 EW |
533 | /* pathbuf.buf is already in r->objects->odb_by_path */ |
534 | ent->path = strbuf_detach(&pathbuf, NULL); | |
c2f493a4 MW |
535 | |
536 | /* add the alternate entry */ | |
f0eaf638 JK |
537 | *r->objects->odb_tail = ent; |
538 | r->objects->odb_tail = &(ent->next); | |
c2f493a4 | 539 | ent->next = NULL; |
cf2dc1c2 EW |
540 | assert(r->objects->odb_by_path); |
541 | kh_value(r->objects->odb_by_path, pos) = ent; | |
c2f493a4 MW |
542 | |
543 | /* recursively add alternates */ | |
cf2dc1c2 | 544 | read_info_alternates(r, ent->path, depth + 1); |
c2f493a4 MW |
545 | |
546 | return 0; | |
547 | } | |
548 | ||
cf3c6352 JK |
549 | static const char *parse_alt_odb_entry(const char *string, |
550 | int sep, | |
551 | struct strbuf *out) | |
552 | { | |
553 | const char *end; | |
554 | ||
555 | strbuf_reset(out); | |
556 | ||
557 | if (*string == '#') { | |
558 | /* comment; consume up to next separator */ | |
559 | end = strchrnul(string, sep); | |
560 | } else if (*string == '"' && !unquote_c_style(out, string, &end)) { | |
561 | /* | |
562 | * quoted path; unquote_c_style has copied the | |
563 | * data for us and set "end". Broken quoting (e.g., | |
564 | * an entry that doesn't end with a quote) falls | |
565 | * back to the unquoted case below. | |
566 | */ | |
567 | } else { | |
568 | /* normal, unquoted path */ | |
569 | end = strchrnul(string, sep); | |
570 | strbuf_add(out, string, end - string); | |
571 | } | |
572 | ||
573 | if (*end) | |
574 | end++; | |
575 | return end; | |
576 | } | |
577 | ||
77f012e8 SB |
578 | static void link_alt_odb_entries(struct repository *r, const char *alt, |
579 | int sep, const char *relative_base, int depth) | |
c2f493a4 | 580 | { |
539e7506 | 581 | struct strbuf objdirbuf = STRBUF_INIT; |
cf3c6352 | 582 | struct strbuf entry = STRBUF_INIT; |
c2f493a4 | 583 | |
f28e3668 JK |
584 | if (!alt || !*alt) |
585 | return; | |
586 | ||
c2f493a4 | 587 | if (depth > 5) { |
259328b7 | 588 | error(_("%s: ignoring alternate object stores, nesting too deep"), |
c2f493a4 MW |
589 | relative_base); |
590 | return; | |
591 | } | |
592 | ||
f0eaf638 | 593 | strbuf_add_absolute_path(&objdirbuf, r->objects->odb->path); |
670c359d | 594 | if (strbuf_normalize_path(&objdirbuf) < 0) |
259328b7 | 595 | die(_("unable to normalize object directory: %s"), |
670c359d | 596 | objdirbuf.buf); |
539e7506 | 597 | |
cf3c6352 JK |
598 | while (*alt) { |
599 | alt = parse_alt_odb_entry(alt, sep, &entry); | |
600 | if (!entry.len) | |
9577e7e3 | 601 | continue; |
407532f8 | 602 | link_alt_odb_entry(r, &entry, |
cfc62fc9 | 603 | relative_base, depth, objdirbuf.buf); |
9577e7e3 | 604 | } |
cf3c6352 | 605 | strbuf_release(&entry); |
539e7506 | 606 | strbuf_release(&objdirbuf); |
d5a63b99 JH |
607 | } |
608 | ||
77f012e8 SB |
609 | static void read_info_alternates(struct repository *r, |
610 | const char *relative_base, | |
611 | int depth) | |
d5a63b99 | 612 | { |
5015f01c | 613 | char *path; |
dc732bd5 | 614 | struct strbuf buf = STRBUF_INIT; |
d5a63b99 | 615 | |
5015f01c | 616 | path = xstrfmt("%s/info/alternates", relative_base); |
dc732bd5 | 617 | if (strbuf_read_file(&buf, path, 1024) < 0) { |
f0f7bebe | 618 | warn_on_fopen_errors(path); |
dc732bd5 | 619 | free(path); |
9a217f2a | 620 | return; |
ace1534d | 621 | } |
d5a63b99 | 622 | |
77f012e8 | 623 | link_alt_odb_entries(r, buf.buf, '\n', relative_base, depth); |
dc732bd5 JK |
624 | strbuf_release(&buf); |
625 | free(path); | |
ace1534d JH |
626 | } |
627 | ||
bef70b22 DB |
628 | void add_to_alternates_file(const char *reference) |
629 | { | |
f132a127 | 630 | struct lock_file lock = LOCK_INIT; |
77b9b1d1 JK |
631 | char *alts = git_pathdup("objects/info/alternates"); |
632 | FILE *in, *out; | |
f132a127 | 633 | int found = 0; |
77b9b1d1 | 634 | |
f132a127 MÅ |
635 | hold_lock_file_for_update(&lock, alts, LOCK_DIE_ON_ERROR); |
636 | out = fdopen_lock_file(&lock, "w"); | |
77b9b1d1 | 637 | if (!out) |
259328b7 | 638 | die_errno(_("unable to fdopen alternates lockfile")); |
77b9b1d1 JK |
639 | |
640 | in = fopen(alts, "r"); | |
641 | if (in) { | |
642 | struct strbuf line = STRBUF_INIT; | |
77b9b1d1 | 643 | |
3f163962 | 644 | while (strbuf_getline(&line, in) != EOF) { |
77b9b1d1 JK |
645 | if (!strcmp(reference, line.buf)) { |
646 | found = 1; | |
647 | break; | |
648 | } | |
649 | fprintf_or_die(out, "%s\n", line.buf); | |
650 | } | |
651 | ||
652 | strbuf_release(&line); | |
653 | fclose(in); | |
77b9b1d1 JK |
654 | } |
655 | else if (errno != ENOENT) | |
259328b7 | 656 | die_errno(_("unable to read alternates file")); |
77b9b1d1 | 657 | |
f132a127 MÅ |
658 | if (found) { |
659 | rollback_lock_file(&lock); | |
660 | } else { | |
77b9b1d1 | 661 | fprintf_or_die(out, "%s\n", reference); |
f132a127 | 662 | if (commit_lock_file(&lock)) |
259328b7 | 663 | die_errno(_("unable to move new alternates file into place")); |
f0eaf638 | 664 | if (the_repository->objects->loaded_alternates) |
93d8d1e2 SB |
665 | link_alt_odb_entries(the_repository, reference, |
666 | '\n', NULL, 0); | |
77b9b1d1 JK |
667 | } |
668 | free(alts); | |
bef70b22 DB |
669 | } |
670 | ||
a5b34d21 JK |
671 | void add_to_alternates_memory(const char *reference) |
672 | { | |
673 | /* | |
674 | * Make sure alternates are initialized, or else our entry may be | |
675 | * overwritten when they are. | |
676 | */ | |
0b209034 | 677 | prepare_alt_odb(the_repository); |
a5b34d21 | 678 | |
93d8d1e2 SB |
679 | link_alt_odb_entries(the_repository, reference, |
680 | '\n', NULL, 0); | |
a5b34d21 JK |
681 | } |
682 | ||
b3cecf49 NS |
683 | struct object_directory *set_temporary_primary_odb(const char *dir, int will_destroy) |
684 | { | |
685 | struct object_directory *new_odb; | |
686 | ||
687 | /* | |
688 | * Make sure alternates are initialized, or else our entry may be | |
689 | * overwritten when they are. | |
690 | */ | |
691 | prepare_alt_odb(the_repository); | |
692 | ||
693 | /* | |
694 | * Make a new primary odb and link the old primary ODB in as an | |
695 | * alternate | |
696 | */ | |
697 | new_odb = xcalloc(1, sizeof(*new_odb)); | |
698 | new_odb->path = xstrdup(dir); | |
ecd81dfc NS |
699 | |
700 | /* | |
701 | * Disable ref updates while a temporary odb is active, since | |
702 | * the objects in the database may roll back. | |
703 | */ | |
704 | new_odb->disable_ref_updates = 1; | |
b3cecf49 NS |
705 | new_odb->will_destroy = will_destroy; |
706 | new_odb->next = the_repository->objects->odb; | |
707 | the_repository->objects->odb = new_odb; | |
708 | return new_odb->next; | |
709 | } | |
710 | ||
711 | void restore_primary_odb(struct object_directory *restore_odb, const char *old_path) | |
712 | { | |
713 | struct object_directory *cur_odb = the_repository->objects->odb; | |
714 | ||
715 | if (strcmp(old_path, cur_odb->path)) | |
716 | BUG("expected %s as primary object store; found %s", | |
717 | old_path, cur_odb->path); | |
718 | ||
719 | if (cur_odb->next != restore_odb) | |
720 | BUG("we expect the old primary object store to be the first alternate"); | |
721 | ||
722 | the_repository->objects->odb = restore_odb; | |
723 | free_object_directory(cur_odb); | |
724 | } | |
725 | ||
9eeea7d2 SB |
726 | /* |
727 | * Compute the exact path an alternate is at and returns it. In case of | |
728 | * error NULL is returned and the human readable error is added to `err` | |
efde7b72 | 729 | * `path` may be relative and should point to $GIT_DIR. |
9eeea7d2 SB |
730 | * `err` must not be null. |
731 | */ | |
732 | char *compute_alternate_path(const char *path, struct strbuf *err) | |
733 | { | |
734 | char *ref_git = NULL; | |
4530a85b | 735 | const char *repo; |
9eeea7d2 SB |
736 | int seen_error = 0; |
737 | ||
4530a85b AM |
738 | ref_git = real_pathdup(path, 0); |
739 | if (!ref_git) { | |
9eeea7d2 SB |
740 | seen_error = 1; |
741 | strbuf_addf(err, _("path '%s' does not exist"), path); | |
742 | goto out; | |
4530a85b | 743 | } |
9eeea7d2 SB |
744 | |
745 | repo = read_gitfile(ref_git); | |
746 | if (!repo) | |
747 | repo = read_gitfile(mkpath("%s/.git", ref_git)); | |
748 | if (repo) { | |
749 | free(ref_git); | |
750 | ref_git = xstrdup(repo); | |
751 | } | |
752 | ||
753 | if (!repo && is_directory(mkpath("%s/.git/objects", ref_git))) { | |
754 | char *ref_git_git = mkpathdup("%s/.git", ref_git); | |
755 | free(ref_git); | |
756 | ref_git = ref_git_git; | |
757 | } else if (!is_directory(mkpath("%s/objects", ref_git))) { | |
758 | struct strbuf sb = STRBUF_INIT; | |
759 | seen_error = 1; | |
760 | if (get_common_dir(&sb, ref_git)) { | |
761 | strbuf_addf(err, | |
762 | _("reference repository '%s' as a linked " | |
763 | "checkout is not supported yet."), | |
764 | path); | |
765 | goto out; | |
766 | } | |
767 | ||
768 | strbuf_addf(err, _("reference repository '%s' is not a " | |
769 | "local repository."), path); | |
770 | goto out; | |
771 | } | |
772 | ||
773 | if (!access(mkpath("%s/shallow", ref_git), F_OK)) { | |
774 | strbuf_addf(err, _("reference repository '%s' is shallow"), | |
775 | path); | |
776 | seen_error = 1; | |
777 | goto out; | |
778 | } | |
779 | ||
780 | if (!access(mkpath("%s/info/grafts", ref_git), F_OK)) { | |
781 | strbuf_addf(err, | |
782 | _("reference repository '%s' is grafted"), | |
783 | path); | |
784 | seen_error = 1; | |
785 | goto out; | |
786 | } | |
787 | ||
788 | out: | |
789 | if (seen_error) { | |
6a83d902 | 790 | FREE_AND_NULL(ref_git); |
9eeea7d2 SB |
791 | } |
792 | ||
793 | return ref_git; | |
794 | } | |
795 | ||
f57a7396 TB |
796 | struct object_directory *find_odb(struct repository *r, const char *obj_dir) |
797 | { | |
798 | struct object_directory *odb; | |
799 | char *obj_dir_real = real_pathdup(obj_dir, 1); | |
800 | struct strbuf odb_path_real = STRBUF_INIT; | |
801 | ||
802 | prepare_alt_odb(r); | |
803 | for (odb = r->objects->odb; odb; odb = odb->next) { | |
804 | strbuf_realpath(&odb_path_real, odb->path, 1); | |
805 | if (!strcmp(obj_dir_real, odb_path_real.buf)) | |
806 | break; | |
807 | } | |
808 | ||
809 | free(obj_dir_real); | |
810 | strbuf_release(&odb_path_real); | |
811 | ||
812 | if (!odb) | |
813 | die(_("could not find object directory matching %s"), obj_dir); | |
814 | return odb; | |
815 | } | |
816 | ||
709dfa69 JK |
817 | static void fill_alternate_refs_command(struct child_process *cmd, |
818 | const char *repo_path) | |
819 | { | |
820 | const char *value; | |
821 | ||
822 | if (!git_config_get_value("core.alternateRefsCommand", &value)) { | |
823 | cmd->use_shell = 1; | |
824 | ||
c972bf4c JK |
825 | strvec_push(&cmd->args, value); |
826 | strvec_push(&cmd->args, repo_path); | |
709dfa69 JK |
827 | } else { |
828 | cmd->git_cmd = 1; | |
829 | ||
c972bf4c JK |
830 | strvec_pushf(&cmd->args, "--git-dir=%s", repo_path); |
831 | strvec_push(&cmd->args, "for-each-ref"); | |
832 | strvec_push(&cmd->args, "--format=%(objectname)"); | |
709dfa69 JK |
833 | |
834 | if (!git_config_get_value("core.alternateRefsPrefixes", &value)) { | |
c972bf4c JK |
835 | strvec_push(&cmd->args, "--"); |
836 | strvec_split(&cmd->args, value); | |
709dfa69 JK |
837 | } |
838 | } | |
839 | ||
c7c4bdec | 840 | strvec_pushv(&cmd->env_array, (const char **)local_repo_env); |
709dfa69 JK |
841 | cmd->out = -1; |
842 | } | |
843 | ||
844 | static void read_alternate_refs(const char *path, | |
845 | alternate_ref_fn *cb, | |
846 | void *data) | |
847 | { | |
848 | struct child_process cmd = CHILD_PROCESS_INIT; | |
849 | struct strbuf line = STRBUF_INIT; | |
850 | FILE *fh; | |
851 | ||
852 | fill_alternate_refs_command(&cmd, path); | |
853 | ||
854 | if (start_command(&cmd)) | |
855 | return; | |
856 | ||
857 | fh = xfdopen(cmd.out, "r"); | |
858 | while (strbuf_getline_lf(&line, fh) != EOF) { | |
859 | struct object_id oid; | |
860 | const char *p; | |
861 | ||
862 | if (parse_oid_hex(line.buf, &oid, &p) || *p) { | |
863 | warning(_("invalid line while parsing alternate refs: %s"), | |
864 | line.buf); | |
865 | break; | |
866 | } | |
867 | ||
868 | cb(&oid, data); | |
869 | } | |
870 | ||
871 | fclose(fh); | |
872 | finish_command(&cmd); | |
86ad3ea5 | 873 | strbuf_release(&line); |
709dfa69 JK |
874 | } |
875 | ||
876 | struct alternate_refs_data { | |
877 | alternate_ref_fn *fn; | |
878 | void *data; | |
879 | }; | |
880 | ||
881 | static int refs_from_alternate_cb(struct object_directory *e, | |
882 | void *data) | |
883 | { | |
884 | struct strbuf path = STRBUF_INIT; | |
885 | size_t base_len; | |
886 | struct alternate_refs_data *cb = data; | |
887 | ||
888 | if (!strbuf_realpath(&path, e->path, 0)) | |
889 | goto out; | |
890 | if (!strbuf_strip_suffix(&path, "/objects")) | |
891 | goto out; | |
892 | base_len = path.len; | |
893 | ||
894 | /* Is this a git repository with refs? */ | |
895 | strbuf_addstr(&path, "/refs"); | |
896 | if (!is_directory(path.buf)) | |
897 | goto out; | |
898 | strbuf_setlen(&path, base_len); | |
899 | ||
900 | read_alternate_refs(path.buf, cb->fn, cb->data); | |
901 | ||
902 | out: | |
903 | strbuf_release(&path); | |
904 | return 0; | |
905 | } | |
906 | ||
907 | void for_each_alternate_ref(alternate_ref_fn fn, void *data) | |
908 | { | |
909 | struct alternate_refs_data cb; | |
910 | cb.fn = fn; | |
911 | cb.data = data; | |
912 | foreach_alt_odb(refs_from_alternate_cb, &cb); | |
913 | } | |
914 | ||
fe1b2268 | 915 | int foreach_alt_odb(alt_odb_fn fn, void *cb) |
d79796bc | 916 | { |
263db403 | 917 | struct object_directory *ent; |
fe1b2268 | 918 | int r = 0; |
d79796bc | 919 | |
0b209034 | 920 | prepare_alt_odb(the_repository); |
f0eaf638 | 921 | for (ent = the_repository->objects->odb->next; ent; ent = ent->next) { |
fe1b2268 JK |
922 | r = fn(ent, cb); |
923 | if (r) | |
924 | break; | |
925 | } | |
926 | return r; | |
d79796bc JH |
927 | } |
928 | ||
13068bf0 | 929 | void prepare_alt_odb(struct repository *r) |
c2f493a4 | 930 | { |
f0eaf638 | 931 | if (r->objects->loaded_alternates) |
7dc24aa5 SP |
932 | return; |
933 | ||
13068bf0 | 934 | link_alt_odb_entries(r, r->objects->alternate_db, PATH_SEP, NULL, 0); |
c2f493a4 | 935 | |
f0eaf638 JK |
936 | read_info_alternates(r, r->objects->odb->path, 0); |
937 | r->objects->loaded_alternates = 1; | |
c2f493a4 MW |
938 | } |
939 | ||
3096b2ec | 940 | /* Returns 1 if we have successfully freshened the file, 0 otherwise. */ |
33d4221c | 941 | static int freshen_file(const char *fn) |
ace1534d | 942 | { |
312cd761 | 943 | return !utime(fn, NULL); |
0f4dc14a | 944 | } |
ace1534d | 945 | |
3096b2ec JK |
946 | /* |
947 | * All of the check_and_freshen functions return 1 if the file exists and was | |
948 | * freshened (if freshening was requested), 0 otherwise. If they return | |
949 | * 0, you should not assume that it is safe to skip a write of the object (it | |
950 | * either does not exist on disk, or has a stale mtime and may be subject to | |
951 | * pruning). | |
952 | */ | |
6a5e6f5e | 953 | int check_and_freshen_file(const char *fn, int freshen) |
33d4221c JK |
954 | { |
955 | if (access(fn, F_OK)) | |
956 | return 0; | |
3096b2ec | 957 | if (freshen && !freshen_file(fn)) |
33d4221c JK |
958 | return 0; |
959 | return 1; | |
960 | } | |
961 | ||
f0eaf638 JK |
962 | static int check_and_freshen_odb(struct object_directory *odb, |
963 | const struct object_id *oid, | |
964 | int freshen) | |
33d4221c | 965 | { |
f0eaf638 | 966 | static struct strbuf path = STRBUF_INIT; |
514c5fdd | 967 | odb_loose_path(odb, &path, oid); |
f0eaf638 JK |
968 | return check_and_freshen_file(path.buf, freshen); |
969 | } | |
ea657730 | 970 | |
f0eaf638 JK |
971 | static int check_and_freshen_local(const struct object_id *oid, int freshen) |
972 | { | |
973 | return check_and_freshen_odb(the_repository->objects->odb, oid, freshen); | |
33d4221c JK |
974 | } |
975 | ||
6862ebbf | 976 | static int check_and_freshen_nonlocal(const struct object_id *oid, int freshen) |
0f4dc14a | 977 | { |
263db403 | 978 | struct object_directory *odb; |
f3f043a1 | 979 | |
0b209034 | 980 | prepare_alt_odb(the_repository); |
f0eaf638 JK |
981 | for (odb = the_repository->objects->odb->next; odb; odb = odb->next) { |
982 | if (check_and_freshen_odb(odb, oid, freshen)) | |
c529d75a | 983 | return 1; |
ace1534d | 984 | } |
c529d75a | 985 | return 0; |
ace1534d JH |
986 | } |
987 | ||
6862ebbf | 988 | static int check_and_freshen(const struct object_id *oid, int freshen) |
33d4221c | 989 | { |
6862ebbf | 990 | return check_and_freshen_local(oid, freshen) || |
991 | check_and_freshen_nonlocal(oid, freshen); | |
33d4221c JK |
992 | } |
993 | ||
6862ebbf | 994 | int has_loose_object_nonlocal(const struct object_id *oid) |
33d4221c | 995 | { |
6862ebbf | 996 | return check_and_freshen_nonlocal(oid, 0); |
33d4221c JK |
997 | } |
998 | ||
6862ebbf | 999 | static int has_loose_object(const struct object_id *oid) |
0f4dc14a | 1000 | { |
6862ebbf | 1001 | return check_and_freshen(oid, 0); |
0f4dc14a BC |
1002 | } |
1003 | ||
02710228 SP |
1004 | static void mmap_limit_check(size_t length) |
1005 | { | |
1006 | static size_t limit = 0; | |
1007 | if (!limit) { | |
1008 | limit = git_env_ulong("GIT_MMAP_LIMIT", 0); | |
1009 | if (!limit) | |
1010 | limit = SIZE_MAX; | |
1011 | } | |
1012 | if (length > limit) | |
259328b7 | 1013 | die(_("attempting to mmap %"PRIuMAX" over limit %"PRIuMAX), |
02710228 SP |
1014 | (uintmax_t)length, (uintmax_t)limit); |
1015 | } | |
1016 | ||
1570856b JK |
1017 | void *xmmap_gently(void *start, size_t length, |
1018 | int prot, int flags, int fd, off_t offset) | |
58ecbd5e | 1019 | { |
02710228 SP |
1020 | void *ret; |
1021 | ||
1022 | mmap_limit_check(length); | |
1023 | ret = mmap(start, length, prot, flags, fd, offset); | |
9827d4c1 JK |
1024 | if (ret == MAP_FAILED && !length) |
1025 | ret = NULL; | |
58ecbd5e JN |
1026 | return ret; |
1027 | } | |
1028 | ||
dc059294 EW |
1029 | const char *mmap_os_err(void) |
1030 | { | |
1031 | static const char blank[] = ""; | |
1032 | #if defined(__linux__) | |
1033 | if (errno == ENOMEM) { | |
1034 | /* this continues an existing error message: */ | |
1035 | static const char enomem[] = | |
1036 | ", check sys.vm.max_map_count and/or RLIMIT_DATA"; | |
1037 | return enomem; | |
1038 | } | |
1039 | #endif /* OS-specific bits */ | |
1040 | return blank; | |
1041 | } | |
1042 | ||
1570856b JK |
1043 | void *xmmap(void *start, size_t length, |
1044 | int prot, int flags, int fd, off_t offset) | |
1045 | { | |
1046 | void *ret = xmmap_gently(start, length, prot, flags, fd, offset); | |
1047 | if (ret == MAP_FAILED) | |
dc059294 | 1048 | die_errno(_("mmap failed%s"), mmap_os_err()); |
1570856b JK |
1049 | return ret; |
1050 | } | |
1051 | ||
b04cdea4 ÆAB |
1052 | static int format_object_header_literally(char *str, size_t size, |
1053 | const char *type, size_t objsize) | |
1054 | { | |
1055 | return xsnprintf(str, size, "%s %"PRIuMAX, type, (uintmax_t)objsize) + 1; | |
1056 | } | |
1057 | ||
1058 | int format_object_header(char *str, size_t size, enum object_type type, | |
1059 | size_t objsize) | |
1060 | { | |
1061 | const char *name = type_name(type); | |
1062 | ||
1063 | if (!name) | |
1064 | BUG("could not get a type name for 'enum object_type' value %d", type); | |
1065 | ||
1066 | return format_object_header_literally(str, size, name, objsize); | |
1067 | } | |
1068 | ||
b98d1885 | 1069 | int check_object_signature(struct repository *r, const struct object_id *oid, |
44439c1c ÆAB |
1070 | void *buf, unsigned long size, |
1071 | enum object_type type) | |
88d0db55 | 1072 | { |
0f156dbb ÆAB |
1073 | struct object_id real_oid; |
1074 | ||
1075 | hash_object_file(r->hash_algo, buf, size, type, &real_oid); | |
1076 | ||
1077 | return !oideq(oid, &real_oid) ? -1 : 0; | |
1078 | } | |
1079 | ||
1080 | int stream_object_signature(struct repository *r, const struct object_id *oid) | |
1081 | { | |
1082 | struct object_id real_oid; | |
1083 | unsigned long size; | |
090ea126 NTND |
1084 | enum object_type obj_type; |
1085 | struct git_istream *st; | |
18e2588e | 1086 | git_hash_ctx c; |
1af64f73 | 1087 | char hdr[MAX_HEADER_LEN]; |
090ea126 | 1088 | int hdrlen; |
88d0db55 | 1089 | |
b98d1885 | 1090 | st = open_istream(r, oid, &obj_type, &size, NULL); |
090ea126 NTND |
1091 | if (!st) |
1092 | return -1; | |
88d0db55 | 1093 | |
090ea126 | 1094 | /* Generate the header */ |
b04cdea4 | 1095 | hdrlen = format_object_header(hdr, sizeof(hdr), obj_type, size); |
88d0db55 | 1096 | |
090ea126 | 1097 | /* Sha1.. */ |
b98d1885 MT |
1098 | r->hash_algo->init_fn(&c); |
1099 | r->hash_algo->update_fn(&c, hdr, hdrlen); | |
090ea126 NTND |
1100 | for (;;) { |
1101 | char buf[1024 * 16]; | |
1102 | ssize_t readlen = read_istream(st, buf, sizeof(buf)); | |
1f688557 | 1103 | |
f54fac53 JK |
1104 | if (readlen < 0) { |
1105 | close_istream(st); | |
1106 | return -1; | |
1107 | } | |
090ea126 NTND |
1108 | if (!readlen) |
1109 | break; | |
b98d1885 | 1110 | r->hash_algo->update_fn(&c, buf, readlen); |
fa5fc15d | 1111 | } |
0f156dbb | 1112 | r->hash_algo->final_oid_fn(&real_oid, &c); |
090ea126 | 1113 | close_istream(st); |
0f156dbb | 1114 | return !oideq(oid, &real_oid) ? -1 : 0; |
fa5fc15d SP |
1115 | } |
1116 | ||
1b8ac5ea | 1117 | int git_open_cloexec(const char *name, int flags) |
a0788266 | 1118 | { |
1e3001a8 JH |
1119 | int fd; |
1120 | static int o_cloexec = O_CLOEXEC; | |
a0788266 | 1121 | |
1e3001a8 JH |
1122 | fd = open(name, flags | o_cloexec); |
1123 | if ((o_cloexec & O_CLOEXEC) && fd < 0 && errno == EINVAL) { | |
cd66ada0 | 1124 | /* Try again w/o O_CLOEXEC: the kernel might not support it */ |
1e3001a8 JH |
1125 | o_cloexec &= ~O_CLOEXEC; |
1126 | fd = open(name, flags | o_cloexec); | |
491a8dec | 1127 | } |
491a8dec | 1128 | |
9fb9495d | 1129 | #if defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC) |
491a8dec | 1130 | { |
1e3001a8 | 1131 | static int fd_cloexec = FD_CLOEXEC; |
a0788266 | 1132 | |
1e3001a8 JH |
1133 | if (!o_cloexec && 0 <= fd && fd_cloexec) { |
1134 | /* Opened w/o O_CLOEXEC? try with fcntl(2) to add it */ | |
9fb9495d EW |
1135 | int flags = fcntl(fd, F_GETFD); |
1136 | if (fcntl(fd, F_SETFD, flags | fd_cloexec)) | |
1e3001a8 | 1137 | fd_cloexec = 0; |
cd66ada0 | 1138 | } |
44d1c19e | 1139 | } |
a0788266 | 1140 | #endif |
1b8ac5ea | 1141 | return fd; |
a0788266 JS |
1142 | } |
1143 | ||
3cf8b462 | 1144 | /* |
514c5fdd | 1145 | * Find "oid" as a loose object in the local repository or in an alternate. |
771e7d57 JK |
1146 | * Returns 0 on success, negative on failure. |
1147 | * | |
1148 | * The "path" out-parameter will give the path of the object we found (if any). | |
1149 | * Note that it may point to static storage and is only valid until another | |
514c5fdd | 1150 | * call to stat_loose_object(). |
3cf8b462 | 1151 | */ |
514c5fdd JK |
1152 | static int stat_loose_object(struct repository *r, const struct object_id *oid, |
1153 | struct stat *st, const char **path) | |
1f688557 | 1154 | { |
263db403 | 1155 | struct object_directory *odb; |
ea657730 CC |
1156 | static struct strbuf buf = STRBUF_INIT; |
1157 | ||
d2607fa0 | 1158 | prepare_alt_odb(r); |
f0eaf638 | 1159 | for (odb = r->objects->odb; odb; odb = odb->next) { |
514c5fdd | 1160 | *path = odb_loose_path(odb, &buf, oid); |
771e7d57 | 1161 | if (!lstat(*path, st)) |
052fe5ea | 1162 | return 0; |
c7934306 SP |
1163 | } |
1164 | ||
3cf8b462 SP |
1165 | return -1; |
1166 | } | |
1167 | ||
771e7d57 | 1168 | /* |
514c5fdd | 1169 | * Like stat_loose_object(), but actually open the object and return the |
771e7d57 JK |
1170 | * descriptor. See the caveats on the "path" parameter above. |
1171 | */ | |
514c5fdd JK |
1172 | static int open_loose_object(struct repository *r, |
1173 | const struct object_id *oid, const char **path) | |
60bb8b14 | 1174 | { |
44d1c19e | 1175 | int fd; |
263db403 | 1176 | struct object_directory *odb; |
f0eaf638 | 1177 | int most_interesting_errno = ENOENT; |
ea657730 CC |
1178 | static struct strbuf buf = STRBUF_INIT; |
1179 | ||
ec7283e5 | 1180 | prepare_alt_odb(r); |
f0eaf638 | 1181 | for (odb = r->objects->odb; odb; odb = odb->next) { |
514c5fdd | 1182 | *path = odb_loose_path(odb, &buf, oid); |
771e7d57 | 1183 | fd = git_open(*path); |
44d1c19e LT |
1184 | if (fd >= 0) |
1185 | return fd; | |
f0eaf638 | 1186 | |
d6c8a05b JK |
1187 | if (most_interesting_errno == ENOENT) |
1188 | most_interesting_errno = errno; | |
03e79c88 | 1189 | } |
d6c8a05b | 1190 | errno = most_interesting_errno; |
44d1c19e | 1191 | return -1; |
1f688557 JH |
1192 | } |
1193 | ||
61c7711c | 1194 | static int quick_has_loose(struct repository *r, |
d7a24573 | 1195 | const struct object_id *oid) |
61c7711c | 1196 | { |
61c7711c JK |
1197 | struct object_directory *odb; |
1198 | ||
61c7711c JK |
1199 | prepare_alt_odb(r); |
1200 | for (odb = r->objects->odb; odb; odb = odb->next) { | |
92d8ed8a | 1201 | if (oidtree_contains(odb_loose_cache(odb, oid), oid)) |
61c7711c JK |
1202 | return 1; |
1203 | } | |
1204 | return 0; | |
1205 | } | |
1206 | ||
f6371f92 JK |
1207 | /* |
1208 | * Map the loose object at "path" if it is not NULL, or the path found by | |
514c5fdd | 1209 | * searching for a loose object named "oid". |
f6371f92 | 1210 | */ |
514c5fdd JK |
1211 | static void *map_loose_object_1(struct repository *r, const char *path, |
1212 | const struct object_id *oid, unsigned long *size) | |
27d69a46 | 1213 | { |
0fcfd160 | 1214 | void *map; |
144bde78 | 1215 | int fd; |
84dd81c1 | 1216 | |
f6371f92 JK |
1217 | if (path) |
1218 | fd = git_open(path); | |
8261e1f1 | 1219 | else |
514c5fdd | 1220 | fd = open_loose_object(r, oid, &path); |
44d1c19e LT |
1221 | map = NULL; |
1222 | if (fd >= 0) { | |
1223 | struct stat st; | |
1f688557 | 1224 | |
44d1c19e LT |
1225 | if (!fstat(fd, &st)) { |
1226 | *size = xsize_t(st.st_size); | |
33e42de0 MM |
1227 | if (!*size) { |
1228 | /* mmap() is forbidden on empty files */ | |
259328b7 | 1229 | error(_("object file %s is empty"), path); |
6881925e | 1230 | close(fd); |
33e42de0 MM |
1231 | return NULL; |
1232 | } | |
44d1c19e | 1233 | map = xmmap(NULL, *size, PROT_READ, MAP_PRIVATE, fd, 0); |
144bde78 | 1234 | } |
44d1c19e | 1235 | close(fd); |
74e34e1f | 1236 | } |
0fcfd160 | 1237 | return map; |
74e34e1f NP |
1238 | } |
1239 | ||
514c5fdd JK |
1240 | void *map_loose_object(struct repository *r, |
1241 | const struct object_id *oid, | |
1242 | unsigned long *size) | |
068f85e3 | 1243 | { |
514c5fdd | 1244 | return map_loose_object_1(r, NULL, oid, size); |
068f85e3 | 1245 | } |
1246 | ||
3b6a8db3 ÆAB |
1247 | enum unpack_loose_header_result unpack_loose_header(git_zstream *stream, |
1248 | unsigned char *map, | |
1249 | unsigned long mapsize, | |
1250 | void *buffer, | |
1251 | unsigned long bufsiz, | |
1252 | struct strbuf *header) | |
47fe3f6e | 1253 | { |
01cab976 | 1254 | int status; |
31877c9a | 1255 | |
c4483576 LT |
1256 | /* Get the data stream */ |
1257 | memset(stream, 0, sizeof(*stream)); | |
1258 | stream->next_in = map; | |
1259 | stream->avail_in = mapsize; | |
1260 | stream->next_out = buffer; | |
93821bd9 | 1261 | stream->avail_out = bufsiz; |
47fe3f6e | 1262 | |
39c68542 | 1263 | git_inflate_init(stream); |
31877c9a | 1264 | obj_read_unlock(); |
01cab976 | 1265 | status = git_inflate(stream, 0); |
31877c9a | 1266 | obj_read_lock(); |
d21f8426 | 1267 | if (status < Z_OK) |
3b6a8db3 | 1268 | return ULHR_BAD; |
d131b7af | 1269 | |
46f03448 KN |
1270 | /* |
1271 | * Check if entire header is unpacked in the first iteration. | |
d131b7af | 1272 | */ |
46f03448 | 1273 | if (memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer)) |
3b6a8db3 | 1274 | return ULHR_OK; |
d131b7af | 1275 | |
01cab976 ÆAB |
1276 | /* |
1277 | * We have a header longer than MAX_HEADER_LEN. The "header" | |
1278 | * here is only non-NULL when we run "cat-file | |
1279 | * --allow-unknown-type". | |
1280 | */ | |
1281 | if (!header) | |
5848fb11 | 1282 | return ULHR_TOO_LONG; |
d131b7af | 1283 | |
46f03448 KN |
1284 | /* |
1285 | * buffer[0..bufsiz] was not large enough. Copy the partial | |
1286 | * result out to header, and then append the result of further | |
1287 | * reading the stream. | |
1288 | */ | |
1289 | strbuf_add(header, buffer, stream->next_out - (unsigned char *)buffer); | |
1290 | stream->next_out = buffer; | |
1291 | stream->avail_out = bufsiz; | |
d131b7af | 1292 | |
46f03448 | 1293 | do { |
31877c9a | 1294 | obj_read_unlock(); |
46f03448 | 1295 | status = git_inflate(stream, 0); |
31877c9a | 1296 | obj_read_lock(); |
46f03448 KN |
1297 | strbuf_add(header, buffer, stream->next_out - (unsigned char *)buffer); |
1298 | if (memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer)) | |
1299 | return 0; | |
1300 | stream->next_out = buffer; | |
1301 | stream->avail_out = bufsiz; | |
1302 | } while (status != Z_STREAM_END); | |
5848fb11 | 1303 | return ULHR_TOO_LONG; |
d131b7af SP |
1304 | } |
1305 | ||
00a7760e JK |
1306 | static void *unpack_loose_rest(git_zstream *stream, |
1307 | void *buffer, unsigned long size, | |
1308 | const struct object_id *oid) | |
95099731 | 1309 | { |
5180cacc | 1310 | int bytes = strlen(buffer) + 1; |
3aee68aa | 1311 | unsigned char *buf = xmallocz(size); |
93821bd9 | 1312 | unsigned long n; |
7efbff75 | 1313 | int status = Z_OK; |
95099731 | 1314 | |
93821bd9 LT |
1315 | n = stream->total_out - bytes; |
1316 | if (n > size) | |
1317 | n = size; | |
1318 | memcpy(buf, (char *) buffer + bytes, n); | |
1319 | bytes = n; | |
456cdf6e LT |
1320 | if (bytes <= size) { |
1321 | /* | |
1322 | * The above condition must be (bytes <= size), not | |
1323 | * (bytes < size). In other words, even though we | |
ccf5ace0 | 1324 | * expect no more output and set avail_out to zero, |
456cdf6e LT |
1325 | * the input zlib stream may have bytes that express |
1326 | * "this concludes the stream", and we *do* want to | |
1327 | * eat that input. | |
1328 | * | |
1329 | * Otherwise we would not be able to test that we | |
1330 | * consumed all the input to reach the expected size; | |
1331 | * we also want to check that zlib tells us that all | |
1332 | * went well with status == Z_STREAM_END at the end. | |
1333 | */ | |
5180cacc LT |
1334 | stream->next_out = buf + bytes; |
1335 | stream->avail_out = size - bytes; | |
31877c9a MT |
1336 | while (status == Z_OK) { |
1337 | obj_read_unlock(); | |
39c68542 | 1338 | status = git_inflate(stream, Z_FINISH); |
31877c9a MT |
1339 | obj_read_lock(); |
1340 | } | |
5180cacc | 1341 | } |
456cdf6e | 1342 | if (status == Z_STREAM_END && !stream->avail_in) { |
39c68542 | 1343 | git_inflate_end(stream); |
7efbff75 | 1344 | return buf; |
95099731 NTND |
1345 | } |
1346 | ||
7efbff75 | 1347 | if (status < 0) |
00a7760e | 1348 | error(_("corrupt loose object '%s'"), oid_to_hex(oid)); |
7efbff75 | 1349 | else if (stream->avail_in) |
259328b7 | 1350 | error(_("garbage at end of loose object '%s'"), |
00a7760e | 1351 | oid_to_hex(oid)); |
7efbff75 JH |
1352 | free(buf); |
1353 | return NULL; | |
95099731 NTND |
1354 | } |
1355 | ||
d40d535b | 1356 | /* |
5180cacc LT |
1357 | * We used to just use "sscanf()", but that's actually way |
1358 | * too permissive for what we want to check. So do an anal | |
1359 | * object header parse by hand. | |
d40d535b | 1360 | */ |
dccb32bf | 1361 | int parse_loose_header(const char *hdr, struct object_info *oi) |
1f688557 | 1362 | { |
46f03448 | 1363 | const char *type_buf = hdr; |
d6a09e79 | 1364 | size_t size; |
46f03448 | 1365 | int type, type_len = 0; |
43057304 | 1366 | |
5180cacc | 1367 | /* |
46f03448 | 1368 | * The type can be of any size but is followed by |
21666f1a | 1369 | * a space. |
5180cacc | 1370 | */ |
5180cacc LT |
1371 | for (;;) { |
1372 | char c = *hdr++; | |
d21f8426 JH |
1373 | if (!c) |
1374 | return -1; | |
5180cacc LT |
1375 | if (c == ' ') |
1376 | break; | |
46f03448 | 1377 | type_len++; |
5180cacc | 1378 | } |
1f688557 | 1379 | |
46f03448 | 1380 | type = type_from_string_gently(type_buf, type_len, 1); |
6ca32f47 BW |
1381 | if (oi->type_name) |
1382 | strbuf_add(oi->type_name, type_buf, type_len); | |
46f03448 KN |
1383 | if (oi->typep) |
1384 | *oi->typep = type; | |
5180cacc LT |
1385 | |
1386 | /* | |
1387 | * The length must follow immediately, and be in canonical | |
1388 | * decimal format (ie "010" is not valid). | |
1389 | */ | |
1390 | size = *hdr++ - '0'; | |
1391 | if (size > 9) | |
1392 | return -1; | |
1393 | if (size) { | |
1394 | for (;;) { | |
1395 | unsigned long c = *hdr - '0'; | |
1396 | if (c > 9) | |
1397 | break; | |
1398 | hdr++; | |
d6a09e79 | 1399 | size = st_add(st_mult(size, 10), c); |
1b1005d1 | 1400 | } |
c01f51cc | 1401 | } |
46f03448 KN |
1402 | |
1403 | if (oi->sizep) | |
d6a09e79 | 1404 | *oi->sizep = cast_size_t_to_ulong(size); |
5180cacc LT |
1405 | |
1406 | /* | |
1407 | * The length must be followed by a zero byte | |
1408 | */ | |
dccb32bf ÆAB |
1409 | if (*hdr) |
1410 | return -1; | |
21666f1a | 1411 | |
dccb32bf ÆAB |
1412 | /* |
1413 | * The format is valid, but the type may still be bogus. The | |
1414 | * Caller needs to check its oi->typep. | |
1415 | */ | |
1416 | return 0; | |
bf592c50 DB |
1417 | } |
1418 | ||
514c5fdd JK |
1419 | static int loose_object_info(struct repository *r, |
1420 | const struct object_id *oid, | |
1421 | struct object_info *oi, int flags) | |
65c2e0c3 | 1422 | { |
46f03448 KN |
1423 | int status = 0; |
1424 | unsigned long mapsize; | |
65c2e0c3 | 1425 | void *map; |
ef49a7a0 | 1426 | git_zstream stream; |
1af64f73 | 1427 | char hdr[MAX_HEADER_LEN]; |
46f03448 | 1428 | struct strbuf hdrbuf = STRBUF_INIT; |
c84a1f3e | 1429 | unsigned long size_scratch; |
dccb32bf | 1430 | enum object_type type_scratch; |
01cab976 | 1431 | int allow_unknown = flags & OBJECT_INFO_ALLOW_UNKNOWN_TYPE; |
65c2e0c3 | 1432 | |
b99b6bcc JK |
1433 | if (oi->delta_base_oid) |
1434 | oidclr(oi->delta_base_oid); | |
5d642e75 | 1435 | |
052fe5ea JK |
1436 | /* |
1437 | * If we don't care about type or size, then we don't | |
4ef8d1dd JH |
1438 | * need to look inside the object at all. Note that we |
1439 | * do not optimize out the stat call, even if the | |
1440 | * caller doesn't care about the disk-size, since our | |
1441 | * return value implicitly indicates whether the | |
1442 | * object even exists. | |
052fe5ea | 1443 | */ |
6ca32f47 | 1444 | if (!oi->typep && !oi->type_name && !oi->sizep && !oi->contentp) { |
771e7d57 | 1445 | const char *path; |
4ef8d1dd | 1446 | struct stat st; |
61c7711c | 1447 | if (!oi->disk_sizep && (flags & OBJECT_INFO_QUICK)) |
d7a24573 | 1448 | return quick_has_loose(r, oid) ? 0 : -1; |
514c5fdd | 1449 | if (stat_loose_object(r, oid, &st, &path) < 0) |
4ef8d1dd JH |
1450 | return -1; |
1451 | if (oi->disk_sizep) | |
23c339c0 | 1452 | *oi->disk_sizep = st.st_size; |
052fe5ea JK |
1453 | return 0; |
1454 | } | |
1455 | ||
514c5fdd | 1456 | map = map_loose_object(r, oid, &mapsize); |
f0df4ed5 | 1457 | if (!map) |
dbea72a8 | 1458 | return -1; |
c84a1f3e JT |
1459 | |
1460 | if (!oi->sizep) | |
1461 | oi->sizep = &size_scratch; | |
dccb32bf ÆAB |
1462 | if (!oi->typep) |
1463 | oi->typep = &type_scratch; | |
c84a1f3e | 1464 | |
23c339c0 JK |
1465 | if (oi->disk_sizep) |
1466 | *oi->disk_sizep = mapsize; | |
01cab976 | 1467 | |
3b6a8db3 ÆAB |
1468 | switch (unpack_loose_header(&stream, map, mapsize, hdr, sizeof(hdr), |
1469 | allow_unknown ? &hdrbuf : NULL)) { | |
1470 | case ULHR_OK: | |
dccb32bf ÆAB |
1471 | if (parse_loose_header(hdrbuf.len ? hdrbuf.buf : hdr, oi) < 0) |
1472 | status = error(_("unable to parse %s header"), oid_to_hex(oid)); | |
1473 | else if (!allow_unknown && *oi->typep < 0) | |
1474 | die(_("invalid object type")); | |
1475 | ||
1476 | if (!oi->contentp) | |
1477 | break; | |
1478 | *oi->contentp = unpack_loose_rest(&stream, hdr, *oi->sizep, oid); | |
1479 | if (*oi->contentp) | |
1480 | goto cleanup; | |
1481 | ||
1482 | status = -1; | |
3b6a8db3 ÆAB |
1483 | break; |
1484 | case ULHR_BAD: | |
259328b7 | 1485 | status = error(_("unable to unpack %s header"), |
514c5fdd | 1486 | oid_to_hex(oid)); |
3b6a8db3 | 1487 | break; |
5848fb11 ÆAB |
1488 | case ULHR_TOO_LONG: |
1489 | status = error(_("header for %s too long, exceeds %d bytes"), | |
1490 | oid_to_hex(oid), MAX_HEADER_LEN); | |
1491 | break; | |
3b6a8db3 | 1492 | } |
c84a1f3e | 1493 | |
dccb32bf ÆAB |
1494 | git_inflate_end(&stream); |
1495 | cleanup: | |
65c2e0c3 | 1496 | munmap(map, mapsize); |
c84a1f3e JT |
1497 | if (oi->sizep == &size_scratch) |
1498 | oi->sizep = NULL; | |
46f03448 | 1499 | strbuf_release(&hdrbuf); |
dccb32bf ÆAB |
1500 | if (oi->typep == &type_scratch) |
1501 | oi->typep = NULL; | |
3ab0fb06 | 1502 | oi->whence = OI_LOOSE; |
dccb32bf | 1503 | return status; |
65c2e0c3 JH |
1504 | } |
1505 | ||
31877c9a MT |
1506 | int obj_read_use_lock = 0; |
1507 | pthread_mutex_t obj_read_mutex; | |
1508 | ||
1509 | void enable_obj_read_lock(void) | |
1510 | { | |
1511 | if (obj_read_use_lock) | |
1512 | return; | |
1513 | ||
1514 | obj_read_use_lock = 1; | |
1515 | init_recursive_mutex(&obj_read_mutex); | |
1516 | } | |
1517 | ||
1518 | void disable_obj_read_lock(void) | |
1519 | { | |
1520 | if (!obj_read_use_lock) | |
1521 | return; | |
1522 | ||
1523 | obj_read_use_lock = 0; | |
1524 | pthread_mutex_destroy(&obj_read_mutex); | |
1525 | } | |
1526 | ||
8b4c0103 JT |
1527 | int fetch_if_missing = 1; |
1528 | ||
31877c9a MT |
1529 | static int do_oid_object_info_extended(struct repository *r, |
1530 | const struct object_id *oid, | |
1531 | struct object_info *oi, unsigned flags) | |
f0df4ed5 | 1532 | { |
cd585e2a | 1533 | static struct object_info blank_oi = OBJECT_INFO_INIT; |
9c8a294a | 1534 | struct cached_object *co; |
f0df4ed5 | 1535 | struct pack_entry e; |
5b086407 | 1536 | int rtype; |
b383a13c | 1537 | const struct object_id *real = oid; |
8b4c0103 | 1538 | int already_retried = 0; |
f0df4ed5 | 1539 | |
31877c9a | 1540 | |
b383a13c | 1541 | if (flags & OBJECT_INFO_LOOKUP_REPLACE) |
9d98354f | 1542 | real = lookup_replace_object(r, oid); |
f0df4ed5 | 1543 | |
b383a13c | 1544 | if (is_null_oid(real)) |
87b5e236 JK |
1545 | return -1; |
1546 | ||
cd585e2a JT |
1547 | if (!oi) |
1548 | oi = &blank_oi; | |
1549 | ||
9c8a294a JT |
1550 | co = find_cached_object(real); |
1551 | if (co) { | |
1552 | if (oi->typep) | |
1553 | *(oi->typep) = co->type; | |
1554 | if (oi->sizep) | |
1555 | *(oi->sizep) = co->size; | |
1556 | if (oi->disk_sizep) | |
1557 | *(oi->disk_sizep) = 0; | |
b99b6bcc JK |
1558 | if (oi->delta_base_oid) |
1559 | oidclr(oi->delta_base_oid); | |
9c8a294a JT |
1560 | if (oi->type_name) |
1561 | strbuf_addstr(oi->type_name, type_name(co->type)); | |
1562 | if (oi->contentp) | |
1563 | *oi->contentp = xmemdupz(co->buf, co->size); | |
1564 | oi->whence = OI_CACHED; | |
1565 | return 0; | |
c4d9986f NTND |
1566 | } |
1567 | ||
8b4c0103 | 1568 | while (1) { |
42c8ce1c | 1569 | if (find_pack_entry(r, real, &e)) |
8b4c0103 JT |
1570 | break; |
1571 | ||
024aa469 TI |
1572 | if (flags & OBJECT_INFO_IGNORE_LOOSE) |
1573 | return -1; | |
1574 | ||
ddd63e64 | 1575 | /* Most likely it's a loose object. */ |
514c5fdd | 1576 | if (!loose_object_info(r, real, oi, flags)) |
5b086407 | 1577 | return 0; |
ddd63e64 SG |
1578 | |
1579 | /* Not a loose object; someone else may have just packed it. */ | |
2b7750c9 | 1580 | if (!(flags & OBJECT_INFO_QUICK)) { |
9d98354f | 1581 | reprepare_packed_git(r); |
42c8ce1c | 1582 | if (find_pack_entry(r, real, &e)) |
2b7750c9 JT |
1583 | break; |
1584 | } | |
8b4c0103 | 1585 | |
eef71904 JT |
1586 | /* |
1587 | * If r is the_repository, this might be an attempt at | |
1588 | * accessing a submodule object as if it were in the_repository | |
1589 | * (having called add_submodule_odb() on that submodule's ODB). | |
1590 | * If any such ODBs exist, register them and try again. | |
1591 | */ | |
1592 | if (r == the_repository && | |
1593 | register_all_submodule_odb_as_alternates()) | |
a35e03de JT |
1594 | /* We added some alternates; retry */ |
1595 | continue; | |
1596 | ||
8b4c0103 | 1597 | /* Check if it is a missing object */ |
ef830cc4 JT |
1598 | if (fetch_if_missing && repo_has_promisor_remote(r) && |
1599 | !already_retried && | |
31f5256c | 1600 | !(flags & OBJECT_INFO_SKIP_FETCH_OBJECT)) { |
8b4c0103 | 1601 | /* |
b14ed5ad CC |
1602 | * TODO Investigate checking promisor_remote_get_direct() |
1603 | * TODO return value and stopping on error here. | |
8b4c0103 | 1604 | */ |
b14ed5ad | 1605 | promisor_remote_get_direct(r, real, 1); |
8b4c0103 JT |
1606 | already_retried = 1; |
1607 | continue; | |
dfdd4afc | 1608 | } |
8b4c0103 JT |
1609 | |
1610 | return -1; | |
f0df4ed5 | 1611 | } |
3d77d877 | 1612 | |
cd585e2a JT |
1613 | if (oi == &blank_oi) |
1614 | /* | |
1615 | * We know that the caller doesn't actually need the | |
1616 | * information below, so return early. | |
1617 | */ | |
1618 | return 0; | |
9d98354f | 1619 | rtype = packed_object_info(r, e.p, e.offset, oi); |
412916ee | 1620 | if (rtype < 0) { |
751530de | 1621 | mark_bad_packed_object(e.p, real); |
31877c9a | 1622 | return do_oid_object_info_extended(r, real, oi, 0); |
3ab0fb06 | 1623 | } else if (oi->whence == OI_PACKED) { |
9a490590 JH |
1624 | oi->u.packed.offset = e.offset; |
1625 | oi->u.packed.pack = e.p; | |
1626 | oi->u.packed.is_delta = (rtype == OBJ_REF_DELTA || | |
1627 | rtype == OBJ_OFS_DELTA); | |
3d77d877 NP |
1628 | } |
1629 | ||
5b086407 | 1630 | return 0; |
f0df4ed5 JS |
1631 | } |
1632 | ||
31877c9a MT |
1633 | int oid_object_info_extended(struct repository *r, const struct object_id *oid, |
1634 | struct object_info *oi, unsigned flags) | |
1635 | { | |
1636 | int ret; | |
1637 | obj_read_lock(); | |
1638 | ret = do_oid_object_info_extended(r, oid, oi, flags); | |
1639 | obj_read_unlock(); | |
1640 | return ret; | |
1641 | } | |
1642 | ||
1643 | ||
3fc0dca9 | 1644 | /* returns enum object_type or negative */ |
9d98354f SB |
1645 | int oid_object_info(struct repository *r, |
1646 | const struct object_id *oid, | |
1647 | unsigned long *sizep) | |
9a490590 | 1648 | { |
5b086407 | 1649 | enum object_type type; |
27b5c1a0 | 1650 | struct object_info oi = OBJECT_INFO_INIT; |
9a490590 | 1651 | |
5b086407 | 1652 | oi.typep = &type; |
9a490590 | 1653 | oi.sizep = sizep; |
9d98354f SB |
1654 | if (oid_object_info_extended(r, oid, &oi, |
1655 | OBJECT_INFO_LOOKUP_REPLACE) < 0) | |
5b086407 JK |
1656 | return -1; |
1657 | return type; | |
9a490590 JH |
1658 | } |
1659 | ||
1b9b5c69 | 1660 | static void *read_object(struct repository *r, |
cba595ab | 1661 | const struct object_id *oid, enum object_type *type, |
f1d8130b JT |
1662 | unsigned long *size) |
1663 | { | |
1664 | struct object_info oi = OBJECT_INFO_INIT; | |
1665 | void *content; | |
1666 | oi.typep = type; | |
1667 | oi.sizep = size; | |
1668 | oi.contentp = &content; | |
1669 | ||
cba595ab | 1670 | if (oid_object_info_extended(r, oid, &oi, 0) < 0) |
f1d8130b JT |
1671 | return NULL; |
1672 | return content; | |
1673 | } | |
1674 | ||
829e5c3b PO |
1675 | int pretend_object_file(void *buf, unsigned long len, enum object_type type, |
1676 | struct object_id *oid) | |
d66b37bb JH |
1677 | { |
1678 | struct cached_object *co; | |
1679 | ||
44439c1c | 1680 | hash_object_file(the_hash_algo, buf, len, type, oid); |
a64d2aae JT |
1681 | if (has_object_file_with_flags(oid, OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT) || |
1682 | find_cached_object(oid)) | |
d66b37bb | 1683 | return 0; |
c7353967 | 1684 | ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc); |
d66b37bb JH |
1685 | co = &cached_objects[cached_object_nr++]; |
1686 | co->size = len; | |
21666f1a | 1687 | co->type = type; |
efa13f7b JH |
1688 | co->buf = xmalloc(len); |
1689 | memcpy(co->buf, buf, len); | |
62ba93ea | 1690 | oidcpy(&co->oid, oid); |
d66b37bb JH |
1691 | return 0; |
1692 | } | |
1693 | ||
b6c4cecc JH |
1694 | /* |
1695 | * This function dies on corrupt objects; the callers who want to | |
1696 | * deal with them should arrange to call read_object() and give error | |
1697 | * messages themselves. | |
1698 | */ | |
a3b72c89 SB |
1699 | void *read_object_file_extended(struct repository *r, |
1700 | const struct object_id *oid, | |
b4f5aca4 | 1701 | enum object_type *type, |
1702 | unsigned long *size, | |
1703 | int lookup_replace) | |
ac939109 | 1704 | { |
3ba7a065 | 1705 | void *data; |
b6c4cecc | 1706 | const struct packed_git *p; |
771e7d57 JK |
1707 | const char *path; |
1708 | struct stat st; | |
1f2e7cea | 1709 | const struct object_id *repl = lookup_replace ? |
a3b72c89 | 1710 | lookup_replace_object(r, oid) : oid; |
b6c4cecc | 1711 | |
3ba7a065 | 1712 | errno = 0; |
cba595ab | 1713 | data = read_object(r, repl, type, size); |
4bbf5a26 | 1714 | if (data) |
b6c4cecc | 1715 | return data; |
68095570 | 1716 | |
31877c9a | 1717 | obj_read_lock(); |
25f3af3f | 1718 | if (errno && errno != ENOENT) |
259328b7 | 1719 | die_errno(_("failed to read object %s"), oid_to_hex(oid)); |
3ba7a065 | 1720 | |
68095570 | 1721 | /* die if we replaced an object with one that does not exist */ |
b383a13c | 1722 | if (repl != oid) |
259328b7 | 1723 | die(_("replacement %s not found for %s"), |
b383a13c | 1724 | oid_to_hex(repl), oid_to_hex(oid)); |
68095570 | 1725 | |
cba595ab | 1726 | if (!stat_loose_object(r, repl, &st, &path)) |
259328b7 | 1727 | die(_("loose object %s (stored in %s) is corrupt"), |
b383a13c | 1728 | oid_to_hex(repl), path); |
68095570 | 1729 | |
7407d733 | 1730 | if ((p = has_packed_and_bad(r, repl)) != NULL) |
259328b7 | 1731 | die(_("packed object %s (stored in %s) is corrupt"), |
b383a13c | 1732 | oid_to_hex(repl), p->pack_name); |
31877c9a | 1733 | obj_read_unlock(); |
f5552aee | 1734 | |
b6c4cecc | 1735 | return NULL; |
ac939109 NP |
1736 | } |
1737 | ||
d3b4705a NTND |
1738 | void *read_object_with_reference(struct repository *r, |
1739 | const struct object_id *oid, | |
6aea6bae | 1740 | enum object_type required_type, |
40469ee9 | 1741 | unsigned long *size, |
02f0547e | 1742 | struct object_id *actual_oid_return) |
f4913f91 | 1743 | { |
6aea6bae | 1744 | enum object_type type; |
f4913f91 JH |
1745 | void *buffer; |
1746 | unsigned long isize; | |
02f0547e | 1747 | struct object_id actual_oid; |
f4913f91 | 1748 | |
02f0547e | 1749 | oidcpy(&actual_oid, oid); |
40469ee9 JH |
1750 | while (1) { |
1751 | int ref_length = -1; | |
1752 | const char *ref_type = NULL; | |
f4913f91 | 1753 | |
d3b4705a | 1754 | buffer = repo_read_object_file(r, &actual_oid, &type, &isize); |
40469ee9 JH |
1755 | if (!buffer) |
1756 | return NULL; | |
21666f1a | 1757 | if (type == required_type) { |
40469ee9 | 1758 | *size = isize; |
02f0547e | 1759 | if (actual_oid_return) |
1760 | oidcpy(actual_oid_return, &actual_oid); | |
40469ee9 JH |
1761 | return buffer; |
1762 | } | |
1763 | /* Handle references */ | |
21666f1a | 1764 | else if (type == OBJ_COMMIT) |
40469ee9 | 1765 | ref_type = "tree "; |
21666f1a | 1766 | else if (type == OBJ_TAG) |
40469ee9 JH |
1767 | ref_type = "object "; |
1768 | else { | |
1769 | free(buffer); | |
1770 | return NULL; | |
1771 | } | |
1772 | ref_length = strlen(ref_type); | |
f4913f91 | 1773 | |
94b5e093 | 1774 | if (ref_length + the_hash_algo->hexsz > isize || |
50974ec9 | 1775 | memcmp(buffer, ref_type, ref_length) || |
02f0547e | 1776 | get_oid_hex((char *) buffer + ref_length, &actual_oid)) { |
40469ee9 JH |
1777 | free(buffer); |
1778 | return NULL; | |
1779 | } | |
1cf58e72 | 1780 | free(buffer); |
40469ee9 | 1781 | /* Now we have the ID of the referred-to object in |
02f0547e | 1782 | * actual_oid. Check again. */ |
f4913f91 | 1783 | } |
f4913f91 JH |
1784 | } |
1785 | ||
2bbb28a3 ÆAB |
1786 | static void hash_object_body(const struct git_hash_algo *algo, git_hash_ctx *c, |
1787 | const void *buf, unsigned long len, | |
1788 | struct object_id *oid, | |
1789 | char *hdr, int *hdrlen) | |
1790 | { | |
1791 | algo->init_fn(c); | |
1792 | algo->update_fn(c, hdr, *hdrlen); | |
1793 | algo->update_fn(c, buf, len); | |
1794 | algo->final_oid_fn(oid, c); | |
1795 | } | |
1796 | ||
7ad5c44d MT |
1797 | static void write_object_file_prepare(const struct git_hash_algo *algo, |
1798 | const void *buf, unsigned long len, | |
2bbb28a3 | 1799 | enum object_type type, struct object_id *oid, |
a09c985e | 1800 | char *hdr, int *hdrlen) |
d410c0f5 | 1801 | { |
18e2588e | 1802 | git_hash_ctx c; |
d410c0f5 JH |
1803 | |
1804 | /* Generate the header */ | |
2bbb28a3 | 1805 | *hdrlen = format_object_header(hdr, *hdrlen, type, len); |
d410c0f5 JH |
1806 | |
1807 | /* Sha1.. */ | |
2bbb28a3 ÆAB |
1808 | hash_object_body(algo, &c, buf, len, oid, hdr, hdrlen); |
1809 | } | |
1810 | ||
1811 | static void write_object_file_prepare_literally(const struct git_hash_algo *algo, | |
1812 | const void *buf, unsigned long len, | |
1813 | const char *type, struct object_id *oid, | |
1814 | char *hdr, int *hdrlen) | |
1815 | { | |
1816 | git_hash_ctx c; | |
1817 | ||
1818 | *hdrlen = format_object_header_literally(hdr, *hdrlen, type, len); | |
1819 | hash_object_body(algo, &c, buf, len, oid, hdr, hdrlen); | |
d410c0f5 JH |
1820 | } |
1821 | ||
230f1322 | 1822 | /* |
5a688fe4 | 1823 | * Move the just written object into its final resting place. |
230f1322 | 1824 | */ |
cb5add58 | 1825 | int finalize_object_file(const char *tmpfile, const char *filename) |
230f1322 | 1826 | { |
e32c0a9c | 1827 | int ret = 0; |
5a688fe4 | 1828 | |
348df166 | 1829 | if (object_creation_mode == OBJECT_CREATION_USES_RENAMES) |
be66a6c4 JS |
1830 | goto try_rename; |
1831 | else if (link(tmpfile, filename)) | |
e32c0a9c | 1832 | ret = errno; |
7ebb6fca LT |
1833 | |
1834 | /* | |
1835 | * Coda hack - coda doesn't like cross-directory links, | |
1836 | * so we fall back to a rename, which will mean that it | |
1837 | * won't be able to check collisions, but that's not a | |
1838 | * big deal. | |
1839 | * | |
1840 | * The same holds for FAT formatted media. | |
1841 | * | |
3be1f18e | 1842 | * When this succeeds, we just return. We have nothing |
7ebb6fca LT |
1843 | * left to unlink. |
1844 | */ | |
1845 | if (ret && ret != EEXIST) { | |
be66a6c4 | 1846 | try_rename: |
7ebb6fca | 1847 | if (!rename(tmpfile, filename)) |
3be1f18e | 1848 | goto out; |
9e48b389 | 1849 | ret = errno; |
230f1322 | 1850 | } |
691f1a28 | 1851 | unlink_or_warn(tmpfile); |
230f1322 LT |
1852 | if (ret) { |
1853 | if (ret != EEXIST) { | |
2c319886 | 1854 | return error_errno(_("unable to write file %s"), filename); |
230f1322 LT |
1855 | } |
1856 | /* FIXME!!! Collision check here ? */ | |
1857 | } | |
1858 | ||
3be1f18e | 1859 | out: |
5256b006 | 1860 | if (adjust_shared_perm(filename)) |
259328b7 | 1861 | return error(_("unable to set permission to '%s'"), filename); |
230f1322 LT |
1862 | return 0; |
1863 | } | |
1864 | ||
4d548150 LT |
1865 | static int write_buffer(int fd, const void *buf, size_t len) |
1866 | { | |
d34cf19b | 1867 | if (write_in_full(fd, buf, len) < 0) |
259328b7 | 1868 | return error_errno(_("file write error")); |
4d548150 LT |
1869 | return 0; |
1870 | } | |
1871 | ||
44439c1c ÆAB |
1872 | static void hash_object_file_literally(const struct git_hash_algo *algo, |
1873 | const void *buf, unsigned long len, | |
1874 | const char *type, struct object_id *oid) | |
abdc3fc8 | 1875 | { |
1af64f73 | 1876 | char hdr[MAX_HEADER_LEN]; |
ef1286d3 | 1877 | int hdrlen = sizeof(hdr); |
44439c1c | 1878 | |
2bbb28a3 | 1879 | write_object_file_prepare_literally(algo, buf, len, type, oid, hdr, &hdrlen); |
abdc3fc8 RS |
1880 | } |
1881 | ||
44439c1c ÆAB |
1882 | void hash_object_file(const struct git_hash_algo *algo, const void *buf, |
1883 | unsigned long len, enum object_type type, | |
1884 | struct object_id *oid) | |
1885 | { | |
1886 | hash_object_file_literally(algo, buf, len, type_name(type), oid); | |
abdc3fc8 RS |
1887 | } |
1888 | ||
e9039dd3 | 1889 | /* Finalize a file on disk, and close it. */ |
514c5fdd | 1890 | static void close_loose_object(int fd) |
e9039dd3 | 1891 | { |
b3cecf49 NS |
1892 | if (!the_repository->objects->odb->will_destroy) { |
1893 | if (fsync_object_files) | |
1894 | fsync_or_die(fd, "loose object file"); | |
1895 | } | |
1896 | ||
e9039dd3 | 1897 | if (close(fd) != 0) |
76011357 | 1898 | die_errno(_("error when closing loose object file")); |
e9039dd3 LT |
1899 | } |
1900 | ||
5723fe7e LT |
1901 | /* Size of directory component, including the ending '/' */ |
1902 | static inline int directory_size(const char *filename) | |
1903 | { | |
1904 | const char *s = strrchr(filename, '/'); | |
1905 | if (!s) | |
1906 | return 0; | |
1907 | return s - filename + 1; | |
1908 | } | |
1909 | ||
1910 | /* | |
1911 | * This creates a temporary file in the same directory as the final | |
1912 | * 'filename' | |
1913 | * | |
1914 | * We want to avoid cross-directory filename renames, because those | |
1915 | * can have problems on various filesystems (FAT, NFS, Coda). | |
1916 | */ | |
d4b3d11a | 1917 | static int create_tmpfile(struct strbuf *tmp, const char *filename) |
5723fe7e LT |
1918 | { |
1919 | int fd, dirlen = directory_size(filename); | |
1920 | ||
d4b3d11a JK |
1921 | strbuf_reset(tmp); |
1922 | strbuf_add(tmp, filename, dirlen); | |
1923 | strbuf_addstr(tmp, "tmp_obj_XXXXXX"); | |
1924 | fd = git_mkstemp_mode(tmp->buf, 0444); | |
cbacbf4e | 1925 | if (fd < 0 && dirlen && errno == ENOENT) { |
d4b3d11a JK |
1926 | /* |
1927 | * Make sure the directory exists; note that the contents | |
1928 | * of the buffer are undefined after mkstemp returns an | |
1929 | * error, so we have to rewrite the whole buffer from | |
1930 | * scratch. | |
1931 | */ | |
1932 | strbuf_reset(tmp); | |
1933 | strbuf_add(tmp, filename, dirlen - 1); | |
1934 | if (mkdir(tmp->buf, 0777) && errno != EEXIST) | |
b2476a60 | 1935 | return -1; |
d4b3d11a | 1936 | if (adjust_shared_perm(tmp->buf)) |
5723fe7e LT |
1937 | return -1; |
1938 | ||
1939 | /* Try again */ | |
d4b3d11a JK |
1940 | strbuf_addstr(tmp, "/tmp_obj_XXXXXX"); |
1941 | fd = git_mkstemp_mode(tmp->buf, 0444); | |
5723fe7e LT |
1942 | } |
1943 | return fd; | |
1944 | } | |
1945 | ||
3fc7281f PO |
1946 | static int write_loose_object(const struct object_id *oid, char *hdr, |
1947 | int hdrlen, const void *buf, unsigned long len, | |
4ef91a2d | 1948 | time_t mtime, unsigned flags) |
0fcfd160 | 1949 | { |
915308b1 | 1950 | int fd, ret; |
9892beba | 1951 | unsigned char compressed[4096]; |
ef49a7a0 | 1952 | git_zstream stream; |
18e2588e | 1953 | git_hash_ctx c; |
3fc7281f | 1954 | struct object_id parano_oid; |
d4b3d11a | 1955 | static struct strbuf tmp_file = STRBUF_INIT; |
ea657730 CC |
1956 | static struct strbuf filename = STRBUF_INIT; |
1957 | ||
514c5fdd | 1958 | loose_object_path(the_repository, &filename, oid); |
a44c9a5e | 1959 | |
ea657730 | 1960 | fd = create_tmpfile(&tmp_file, filename.buf); |
aac17941 | 1961 | if (fd < 0) { |
4ef91a2d ÆAB |
1962 | if (flags & HASH_SILENT) |
1963 | return -1; | |
1964 | else if (errno == EACCES) | |
259328b7 | 1965 | return error(_("insufficient permission for adding an object to repository database %s"), get_object_directory()); |
916d081b | 1966 | else |
259328b7 | 1967 | return error_errno(_("unable to create temporary file")); |
aac17941 LT |
1968 | } |
1969 | ||
0fcfd160 | 1970 | /* Set it up */ |
55bb5c91 | 1971 | git_deflate_init(&stream, zlib_compression_level); |
0fcfd160 | 1972 | stream.next_out = compressed; |
9892beba | 1973 | stream.avail_out = sizeof(compressed); |
18e2588e | 1974 | the_hash_algo->init_fn(&c); |
a44c9a5e LT |
1975 | |
1976 | /* First header.. */ | |
d65a16f6 | 1977 | stream.next_in = (unsigned char *)hdr; |
a44c9a5e | 1978 | stream.avail_in = hdrlen; |
55bb5c91 JH |
1979 | while (git_deflate(&stream, 0) == Z_OK) |
1980 | ; /* nothing */ | |
18e2588e | 1981 | the_hash_algo->update_fn(&c, hdr, hdrlen); |
a44c9a5e LT |
1982 | |
1983 | /* Then the data itself.. */ | |
c00e657d | 1984 | stream.next_in = (void *)buf; |
a44c9a5e | 1985 | stream.avail_in = len; |
9892beba | 1986 | do { |
748af44c | 1987 | unsigned char *in0 = stream.next_in; |
55bb5c91 | 1988 | ret = git_deflate(&stream, Z_FINISH); |
18e2588e | 1989 | the_hash_algo->update_fn(&c, in0, stream.next_in - in0); |
9892beba | 1990 | if (write_buffer(fd, compressed, stream.next_out - compressed) < 0) |
76011357 | 1991 | die(_("unable to write loose object file")); |
9892beba NP |
1992 | stream.next_out = compressed; |
1993 | stream.avail_out = sizeof(compressed); | |
1994 | } while (ret == Z_OK); | |
1995 | ||
ac54c277 | 1996 | if (ret != Z_STREAM_END) |
259328b7 | 1997 | die(_("unable to deflate new object %s (%d)"), oid_to_hex(oid), |
3fc7281f | 1998 | ret); |
55bb5c91 | 1999 | ret = git_deflate_end_gently(&stream); |
ac54c277 | 2000 | if (ret != Z_OK) |
259328b7 | 2001 | die(_("deflateEnd on object %s failed (%d)"), oid_to_hex(oid), |
3fc7281f | 2002 | ret); |
5951bf46 | 2003 | the_hash_algo->final_oid_fn(¶no_oid, &c); |
9001dc2a | 2004 | if (!oideq(oid, ¶no_oid)) |
259328b7 | 2005 | die(_("confused by unstable object source data for %s"), |
3fc7281f | 2006 | oid_to_hex(oid)); |
ac54c277 | 2007 | |
514c5fdd | 2008 | close_loose_object(fd); |
0fcfd160 | 2009 | |
bbac7311 NP |
2010 | if (mtime) { |
2011 | struct utimbuf utb; | |
2012 | utb.actime = mtime; | |
2013 | utb.modtime = mtime; | |
4ef91a2d ÆAB |
2014 | if (utime(tmp_file.buf, &utb) < 0 && |
2015 | !(flags & HASH_SILENT)) | |
259328b7 | 2016 | warning_errno(_("failed utime() on %s"), tmp_file.buf); |
bbac7311 NP |
2017 | } |
2018 | ||
ea657730 | 2019 | return finalize_object_file(tmp_file.buf, filename.buf); |
0fcfd160 | 2020 | } |
8237b185 | 2021 | |
6862ebbf | 2022 | static int freshen_loose_object(const struct object_id *oid) |
33d4221c | 2023 | { |
6862ebbf | 2024 | return check_and_freshen(oid, 1); |
33d4221c JK |
2025 | } |
2026 | ||
6862ebbf | 2027 | static int freshen_packed_object(const struct object_id *oid) |
33d4221c JK |
2028 | { |
2029 | struct pack_entry e; | |
544443cb | 2030 | if (!find_pack_entry(the_repository, oid, &e)) |
ee1c6c34 JK |
2031 | return 0; |
2032 | if (e.p->freshened) | |
2033 | return 1; | |
2034 | if (!freshen_file(e.p->pack_name)) | |
2035 | return 0; | |
2036 | e.p->freshened = 1; | |
2037 | return 1; | |
33d4221c JK |
2038 | } |
2039 | ||
4ef91a2d | 2040 | int write_object_file_flags(const void *buf, unsigned long len, |
c80d226a | 2041 | enum object_type type, struct object_id *oid, |
4ef91a2d | 2042 | unsigned flags) |
bbac7311 | 2043 | { |
1af64f73 | 2044 | char hdr[MAX_HEADER_LEN]; |
ef1286d3 | 2045 | int hdrlen = sizeof(hdr); |
bbac7311 NP |
2046 | |
2047 | /* Normally if we have it in the pack then we do not bother writing | |
2048 | * it out into .git/objects/??/?{38} file. | |
2049 | */ | |
7ad5c44d MT |
2050 | write_object_file_prepare(the_hash_algo, buf, len, type, oid, hdr, |
2051 | &hdrlen); | |
6862ebbf | 2052 | if (freshen_packed_object(oid) || freshen_loose_object(oid)) |
bbac7311 | 2053 | return 0; |
4ef91a2d | 2054 | return write_loose_object(oid, hdr, hdrlen, buf, len, 0, flags); |
bbac7311 NP |
2055 | } |
2056 | ||
0ff7b4f9 ÆAB |
2057 | int write_object_file_literally(const void *buf, unsigned long len, |
2058 | const char *type, struct object_id *oid, | |
2059 | unsigned flags) | |
0c3db67c ES |
2060 | { |
2061 | char *header; | |
2062 | int hdrlen, status = 0; | |
2063 | ||
2064 | /* type string, SP, %lu of the length plus NUL must fit this */ | |
1af64f73 | 2065 | hdrlen = strlen(type) + MAX_HEADER_LEN; |
ef1286d3 | 2066 | header = xmalloc(hdrlen); |
2bbb28a3 ÆAB |
2067 | write_object_file_prepare_literally(the_hash_algo, buf, len, type, |
2068 | oid, header, &hdrlen); | |
0c3db67c ES |
2069 | |
2070 | if (!(flags & HASH_WRITE_OBJECT)) | |
2071 | goto cleanup; | |
6862ebbf | 2072 | if (freshen_packed_object(oid) || freshen_loose_object(oid)) |
0c3db67c | 2073 | goto cleanup; |
4ef91a2d | 2074 | status = write_loose_object(oid, header, hdrlen, buf, len, 0, 0); |
0c3db67c ES |
2075 | |
2076 | cleanup: | |
2077 | free(header); | |
2078 | return status; | |
2079 | } | |
2080 | ||
4bdb70a4 | 2081 | int force_object_loose(const struct object_id *oid, time_t mtime) |
bbac7311 | 2082 | { |
bbac7311 NP |
2083 | void *buf; |
2084 | unsigned long len; | |
2085 | enum object_type type; | |
1af64f73 | 2086 | char hdr[MAX_HEADER_LEN]; |
bbac7311 | 2087 | int hdrlen; |
1fb23e65 | 2088 | int ret; |
bbac7311 | 2089 | |
6862ebbf | 2090 | if (has_loose_object(oid)) |
bbac7311 | 2091 | return 0; |
cba595ab | 2092 | buf = read_object(the_repository, oid, &type, &len); |
bbac7311 | 2093 | if (!buf) |
2c319886 | 2094 | return error(_("cannot read object for %s"), oid_to_hex(oid)); |
b04cdea4 | 2095 | hdrlen = format_object_header(hdr, sizeof(hdr), type, len); |
4ef91a2d | 2096 | ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime, 0); |
1fb23e65 BS |
2097 | free(buf); |
2098 | ||
2099 | return ret; | |
bbac7311 NP |
2100 | } |
2101 | ||
1d8d9cb6 JT |
2102 | int has_object(struct repository *r, const struct object_id *oid, |
2103 | unsigned flags) | |
2104 | { | |
2105 | int quick = !(flags & HAS_OBJECT_RECHECK_PACKED); | |
2106 | unsigned object_info_flags = OBJECT_INFO_SKIP_FETCH_OBJECT | | |
2107 | (quick ? OBJECT_INFO_QUICK : 0); | |
2108 | ||
2109 | if (!startup_info->have_repository) | |
2110 | return 0; | |
2111 | return oid_object_info_extended(r, oid, NULL, object_info_flags) >= 0; | |
2112 | } | |
2113 | ||
cba595ab JH |
2114 | int repo_has_object_file_with_flags(struct repository *r, |
2115 | const struct object_id *oid, int flags) | |
8237b185 | 2116 | { |
3e8b7d3c JN |
2117 | if (!startup_info->have_repository) |
2118 | return 0; | |
9c8a294a | 2119 | return oid_object_info_extended(r, oid, NULL, flags) >= 0; |
b419aa25 | 2120 | } |
2121 | ||
9b45f499 SB |
2122 | int repo_has_object_file(struct repository *r, |
2123 | const struct object_id *oid) | |
b419aa25 | 2124 | { |
cba595ab | 2125 | return repo_has_object_file_with_flags(r, oid, 0); |
5827a035 JK |
2126 | } |
2127 | ||
c879daa2 NTND |
2128 | static void check_tree(const void *buf, size_t size) |
2129 | { | |
2130 | struct tree_desc desc; | |
2131 | struct name_entry entry; | |
2132 | ||
2133 | init_tree_desc(&desc, buf, size); | |
2134 | while (tree_entry(&desc, &entry)) | |
2135 | /* do nothing | |
2136 | * tree_entry() will die() on malformed entries */ | |
2137 | ; | |
2138 | } | |
2139 | ||
2140 | static void check_commit(const void *buf, size_t size) | |
2141 | { | |
2142 | struct commit c; | |
2143 | memset(&c, 0, sizeof(c)); | |
08f4f445 | 2144 | if (parse_commit_buffer(the_repository, &c, buf, size, 0)) |
259328b7 | 2145 | die(_("corrupt commit")); |
c879daa2 NTND |
2146 | } |
2147 | ||
2148 | static void check_tag(const void *buf, size_t size) | |
2149 | { | |
2150 | struct tag t; | |
2151 | memset(&t, 0, sizeof(t)); | |
0e740fed | 2152 | if (parse_tag_buffer(the_repository, &t, buf, size)) |
259328b7 | 2153 | die(_("corrupt tag")); |
c879daa2 NTND |
2154 | } |
2155 | ||
58bf2a4c NTND |
2156 | static int index_mem(struct index_state *istate, |
2157 | struct object_id *oid, void *buf, size_t size, | |
c4ce46fc JH |
2158 | enum object_type type, |
2159 | const char *path, unsigned flags) | |
e7332f96 | 2160 | { |
63e05f90 | 2161 | int ret = 0; |
bbea0dde | 2162 | int re_allocated = 0; |
c4ce46fc | 2163 | int write_object = flags & HASH_WRITE_OBJECT; |
74400e71 | 2164 | |
7672db20 | 2165 | if (!type) |
edaec3fb | 2166 | type = OBJ_BLOB; |
6c510bee LT |
2167 | |
2168 | /* | |
2169 | * Convert blobs to git internal format | |
2170 | */ | |
43df4f86 | 2171 | if ((type == OBJ_BLOB) && path) { |
f285a2d7 | 2172 | struct strbuf nbuf = STRBUF_INIT; |
58bf2a4c | 2173 | if (convert_to_git(istate, path, buf, size, &nbuf, |
8462ff43 | 2174 | get_conv_flags(flags))) { |
b315c5c0 | 2175 | buf = strbuf_detach(&nbuf, &size); |
6c510bee LT |
2176 | re_allocated = 1; |
2177 | } | |
2178 | } | |
c4ce46fc | 2179 | if (flags & HASH_FORMAT_CHECK) { |
c879daa2 NTND |
2180 | if (type == OBJ_TREE) |
2181 | check_tree(buf, size); | |
2182 | if (type == OBJ_COMMIT) | |
2183 | check_commit(buf, size); | |
2184 | if (type == OBJ_TAG) | |
2185 | check_tag(buf, size); | |
2186 | } | |
6c510bee | 2187 | |
7672db20 | 2188 | if (write_object) |
c80d226a | 2189 | ret = write_object_file(buf, size, type, oid); |
abdc3fc8 | 2190 | else |
44439c1c | 2191 | hash_object_file(the_hash_algo, buf, size, type, oid); |
43df4f86 | 2192 | if (re_allocated) |
6c510bee | 2193 | free(buf); |
43df4f86 DP |
2194 | return ret; |
2195 | } | |
2196 | ||
58bf2a4c NTND |
2197 | static int index_stream_convert_blob(struct index_state *istate, |
2198 | struct object_id *oid, | |
2199 | int fd, | |
2200 | const char *path, | |
2201 | unsigned flags) | |
9035d75a | 2202 | { |
63e05f90 | 2203 | int ret = 0; |
9035d75a SP |
2204 | const int write_object = flags & HASH_WRITE_OBJECT; |
2205 | struct strbuf sbuf = STRBUF_INIT; | |
2206 | ||
2207 | assert(path); | |
58bf2a4c | 2208 | assert(would_convert_to_git_filter_fd(istate, path)); |
9035d75a | 2209 | |
58bf2a4c | 2210 | convert_to_git_filter_fd(istate, path, fd, &sbuf, |
8462ff43 | 2211 | get_conv_flags(flags)); |
9035d75a SP |
2212 | |
2213 | if (write_object) | |
c80d226a | 2214 | ret = write_object_file(sbuf.buf, sbuf.len, OBJ_BLOB, |
a09c985e | 2215 | oid); |
9035d75a | 2216 | else |
44439c1c ÆAB |
2217 | hash_object_file(the_hash_algo, sbuf.buf, sbuf.len, OBJ_BLOB, |
2218 | oid); | |
9035d75a SP |
2219 | strbuf_release(&sbuf); |
2220 | return ret; | |
2221 | } | |
2222 | ||
58bf2a4c NTND |
2223 | static int index_pipe(struct index_state *istate, struct object_id *oid, |
2224 | int fd, enum object_type type, | |
7b41e1e1 JH |
2225 | const char *path, unsigned flags) |
2226 | { | |
2227 | struct strbuf sbuf = STRBUF_INIT; | |
2228 | int ret; | |
2229 | ||
2230 | if (strbuf_read(&sbuf, fd, 4096) >= 0) | |
58bf2a4c | 2231 | ret = index_mem(istate, oid, sbuf.buf, sbuf.len, type, path, flags); |
7b41e1e1 JH |
2232 | else |
2233 | ret = -1; | |
2234 | strbuf_release(&sbuf); | |
2235 | return ret; | |
2236 | } | |
2237 | ||
ea68b0ce DP |
2238 | #define SMALL_FILE_SIZE (32*1024) |
2239 | ||
58bf2a4c NTND |
2240 | static int index_core(struct index_state *istate, |
2241 | struct object_id *oid, int fd, size_t size, | |
7b41e1e1 JH |
2242 | enum object_type type, const char *path, |
2243 | unsigned flags) | |
43df4f86 DP |
2244 | { |
2245 | int ret; | |
43df4f86 | 2246 | |
7b41e1e1 | 2247 | if (!size) { |
58bf2a4c | 2248 | ret = index_mem(istate, oid, "", size, type, path, flags); |
ea68b0ce DP |
2249 | } else if (size <= SMALL_FILE_SIZE) { |
2250 | char *buf = xmalloc(size); | |
90dca671 JK |
2251 | ssize_t read_result = read_in_full(fd, buf, size); |
2252 | if (read_result < 0) | |
259328b7 | 2253 | ret = error_errno(_("read error while indexing %s"), |
90dca671 JK |
2254 | path ? path : "<unknown>"); |
2255 | else if (read_result != size) | |
259328b7 | 2256 | ret = error(_("short read while indexing %s"), |
90dca671 | 2257 | path ? path : "<unknown>"); |
ea68b0ce | 2258 | else |
58bf2a4c | 2259 | ret = index_mem(istate, oid, buf, size, type, path, flags); |
ea68b0ce | 2260 | free(buf); |
08bda208 | 2261 | } else { |
43df4f86 | 2262 | void *buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0); |
58bf2a4c | 2263 | ret = index_mem(istate, oid, buf, size, type, path, flags); |
aac17941 | 2264 | munmap(buf, size); |
08bda208 | 2265 | } |
7b41e1e1 JH |
2266 | return ret; |
2267 | } | |
2268 | ||
4dd1fbc7 | 2269 | /* |
568508e7 JH |
2270 | * This creates one packfile per large blob unless bulk-checkin |
2271 | * machinery is "plugged". | |
4dd1fbc7 JH |
2272 | * |
2273 | * This also bypasses the usual "convert-to-git" dance, and that is on | |
2274 | * purpose. We could write a streaming version of the converting | |
2275 | * functions and insert that before feeding the data to fast-import | |
4f22b101 JK |
2276 | * (or equivalent in-core API described above). However, that is |
2277 | * somewhat complicated, as we do not know the size of the filter | |
2278 | * result, which we need to know beforehand when writing a git object. | |
2279 | * Since the primary motivation for trying to stream from the working | |
2280 | * tree file and to avoid mmaping it in core is to deal with large | |
2281 | * binary blobs, they generally do not want to get any conversion, and | |
2282 | * callers should avoid this code path when filters are requested. | |
4dd1fbc7 | 2283 | */ |
7d5e1dc3 | 2284 | static int index_stream(struct object_id *oid, int fd, size_t size, |
4dd1fbc7 JH |
2285 | enum object_type type, const char *path, |
2286 | unsigned flags) | |
2287 | { | |
68ee6dfc | 2288 | return index_bulk_checkin(oid, fd, size, type, path, flags); |
4dd1fbc7 JH |
2289 | } |
2290 | ||
58bf2a4c NTND |
2291 | int index_fd(struct index_state *istate, struct object_id *oid, |
2292 | int fd, struct stat *st, | |
7b41e1e1 JH |
2293 | enum object_type type, const char *path, unsigned flags) |
2294 | { | |
2295 | int ret; | |
7b41e1e1 | 2296 | |
9079ab7c SP |
2297 | /* |
2298 | * Call xsize_t() only when needed to avoid potentially unnecessary | |
2299 | * die() for large files. | |
2300 | */ | |
58bf2a4c NTND |
2301 | if (type == OBJ_BLOB && path && would_convert_to_git_filter_fd(istate, path)) |
2302 | ret = index_stream_convert_blob(istate, oid, fd, path, flags); | |
9035d75a | 2303 | else if (!S_ISREG(st->st_mode)) |
58bf2a4c | 2304 | ret = index_pipe(istate, oid, fd, type, path, flags); |
9079ab7c | 2305 | else if (st->st_size <= big_file_threshold || type != OBJ_BLOB || |
58bf2a4c NTND |
2306 | (path && would_convert_to_git(istate, path))) |
2307 | ret = index_core(istate, oid, fd, xsize_t(st->st_size), | |
2308 | type, path, flags); | |
4dd1fbc7 | 2309 | else |
7d5e1dc3 | 2310 | ret = index_stream(oid, fd, xsize_t(st->st_size), type, path, |
9079ab7c | 2311 | flags); |
43df4f86 | 2312 | close(fd); |
aac17941 | 2313 | return ret; |
74400e71 | 2314 | } |
ec1fcc16 | 2315 | |
58bf2a4c NTND |
2316 | int index_path(struct index_state *istate, struct object_id *oid, |
2317 | const char *path, struct stat *st, unsigned flags) | |
ec1fcc16 JH |
2318 | { |
2319 | int fd; | |
b760d3aa | 2320 | struct strbuf sb = STRBUF_INIT; |
ea8e0297 | 2321 | int rc = 0; |
ec1fcc16 JH |
2322 | |
2323 | switch (st->st_mode & S_IFMT) { | |
2324 | case S_IFREG: | |
2325 | fd = open(path, O_RDONLY); | |
2326 | if (fd < 0) | |
7616c6ca | 2327 | return error_errno("open(\"%s\")", path); |
58bf2a4c | 2328 | if (index_fd(istate, oid, fd, st, OBJ_BLOB, path, flags) < 0) |
259328b7 | 2329 | return error(_("%s: failed to insert into database"), |
ec1fcc16 JH |
2330 | path); |
2331 | break; | |
2332 | case S_IFLNK: | |
7616c6ca NTND |
2333 | if (strbuf_readlink(&sb, path, st->st_size)) |
2334 | return error_errno("readlink(\"%s\")", path); | |
c4ce46fc | 2335 | if (!(flags & HASH_WRITE_OBJECT)) |
2dcde20e | 2336 | hash_object_file(the_hash_algo, sb.buf, sb.len, |
44439c1c | 2337 | OBJ_BLOB, oid); |
c80d226a | 2338 | else if (write_object_file(sb.buf, sb.len, OBJ_BLOB, oid)) |
259328b7 | 2339 | rc = error(_("%s: failed to insert into database"), path); |
b760d3aa | 2340 | strbuf_release(&sb); |
ec1fcc16 | 2341 | break; |
f35a6d3b | 2342 | case S_IFDIR: |
a98e6101 | 2343 | return resolve_gitlink_ref(path, "HEAD", oid); |
ec1fcc16 | 2344 | default: |
259328b7 | 2345 | return error(_("%s: unsupported file type"), path); |
ec1fcc16 | 2346 | } |
ea8e0297 | 2347 | return rc; |
ec1fcc16 | 2348 | } |
a69e5429 JH |
2349 | |
2350 | int read_pack_header(int fd, struct pack_header *header) | |
2351 | { | |
f48ecd38 | 2352 | if (read_in_full(fd, header, sizeof(*header)) != sizeof(*header)) |
c697ad14 HO |
2353 | /* "eof before pack header was fully read" */ |
2354 | return PH_ERROR_EOF; | |
2355 | ||
a69e5429 JH |
2356 | if (header->hdr_signature != htonl(PACK_SIGNATURE)) |
2357 | /* "protocol error (pack signature mismatch detected)" */ | |
2358 | return PH_ERROR_PACK_SIGNATURE; | |
2359 | if (!pack_version_ok(header->hdr_version)) | |
2360 | /* "protocol error (pack version unsupported)" */ | |
2361 | return PH_ERROR_PROTOCOL; | |
2362 | return 0; | |
2363 | } | |
40d52ff7 | 2364 | |
e816caa0 | 2365 | void assert_oid_type(const struct object_id *oid, enum object_type expect) |
40d52ff7 | 2366 | { |
0df8e965 | 2367 | enum object_type type = oid_object_info(the_repository, oid, NULL); |
40d52ff7 | 2368 | if (type < 0) |
259328b7 | 2369 | die(_("%s is not a valid object"), oid_to_hex(oid)); |
40d52ff7 | 2370 | if (type != expect) |
259328b7 | 2371 | die(_("%s is not a valid '%s' object"), oid_to_hex(oid), |
debca9d2 | 2372 | type_name(expect)); |
40d52ff7 | 2373 | } |
27e1e22d | 2374 | |
70c49050 | 2375 | int for_each_file_in_obj_subdir(unsigned int subdir_nr, |
cc817ca3 RS |
2376 | struct strbuf *path, |
2377 | each_loose_object_fn obj_cb, | |
2378 | each_loose_cruft_fn cruft_cb, | |
2379 | each_loose_subdir_fn subdir_cb, | |
2380 | void *data) | |
27e1e22d | 2381 | { |
0375f472 RS |
2382 | size_t origlen, baselen; |
2383 | DIR *dir; | |
27e1e22d JK |
2384 | struct dirent *de; |
2385 | int r = 0; | |
62a24c89 | 2386 | struct object_id oid; |
27e1e22d | 2387 | |
70c49050 RS |
2388 | if (subdir_nr > 0xff) |
2389 | BUG("invalid loose object subdirectory: %x", subdir_nr); | |
2390 | ||
0375f472 RS |
2391 | origlen = path->len; |
2392 | strbuf_complete(path, '/'); | |
2393 | strbuf_addf(path, "%02x", subdir_nr); | |
0375f472 RS |
2394 | |
2395 | dir = opendir(path->buf); | |
27e1e22d | 2396 | if (!dir) { |
0375f472 | 2397 | if (errno != ENOENT) |
259328b7 | 2398 | r = error_errno(_("unable to open %s"), path->buf); |
0375f472 RS |
2399 | strbuf_setlen(path, origlen); |
2400 | return r; | |
27e1e22d JK |
2401 | } |
2402 | ||
62a24c89 | 2403 | oid.hash[0] = subdir_nr; |
163ee5e6 DS |
2404 | strbuf_addch(path, '/'); |
2405 | baselen = path->len; | |
62a24c89 | 2406 | |
b548f0f1 | 2407 | while ((de = readdir_skip_dot_and_dotdot(dir))) { |
163ee5e6 | 2408 | size_t namelen; |
27e1e22d | 2409 | |
163ee5e6 | 2410 | namelen = strlen(de->d_name); |
27e1e22d | 2411 | strbuf_setlen(path, baselen); |
163ee5e6 | 2412 | strbuf_add(path, de->d_name, namelen); |
94b5e093 | 2413 | if (namelen == the_hash_algo->hexsz - 2 && |
62a24c89 | 2414 | !hex_to_bytes(oid.hash + 1, de->d_name, |
94b5e093 | 2415 | the_hash_algo->rawsz - 1)) { |
5a6dce70 | 2416 | oid_set_algo(&oid, the_hash_algo); |
62a24c89 RS |
2417 | if (obj_cb) { |
2418 | r = obj_cb(&oid, path->buf, data); | |
2419 | if (r) | |
2420 | break; | |
27e1e22d | 2421 | } |
62a24c89 | 2422 | continue; |
27e1e22d JK |
2423 | } |
2424 | ||
2425 | if (cruft_cb) { | |
2426 | r = cruft_cb(de->d_name, path->buf, data); | |
2427 | if (r) | |
2428 | break; | |
2429 | } | |
2430 | } | |
094c7e63 | 2431 | closedir(dir); |
27e1e22d | 2432 | |
163ee5e6 | 2433 | strbuf_setlen(path, baselen - 1); |
27e1e22d JK |
2434 | if (!r && subdir_cb) |
2435 | r = subdir_cb(subdir_nr, path->buf, data); | |
2436 | ||
0375f472 RS |
2437 | strbuf_setlen(path, origlen); |
2438 | ||
27e1e22d JK |
2439 | return r; |
2440 | } | |
2441 | ||
e6f875e0 | 2442 | int for_each_loose_file_in_objdir_buf(struct strbuf *path, |
27e1e22d JK |
2443 | each_loose_object_fn obj_cb, |
2444 | each_loose_cruft_fn cruft_cb, | |
2445 | each_loose_subdir_fn subdir_cb, | |
2446 | void *data) | |
2447 | { | |
27e1e22d JK |
2448 | int r = 0; |
2449 | int i; | |
2450 | ||
27e1e22d | 2451 | for (i = 0; i < 256; i++) { |
e6f875e0 | 2452 | r = for_each_file_in_obj_subdir(i, path, obj_cb, cruft_cb, |
27e1e22d | 2453 | subdir_cb, data); |
27e1e22d JK |
2454 | if (r) |
2455 | break; | |
2456 | } | |
2457 | ||
e6f875e0 JK |
2458 | return r; |
2459 | } | |
2460 | ||
2461 | int for_each_loose_file_in_objdir(const char *path, | |
2462 | each_loose_object_fn obj_cb, | |
2463 | each_loose_cruft_fn cruft_cb, | |
2464 | each_loose_subdir_fn subdir_cb, | |
2465 | void *data) | |
2466 | { | |
2467 | struct strbuf buf = STRBUF_INIT; | |
2468 | int r; | |
2469 | ||
2470 | strbuf_addstr(&buf, path); | |
2471 | r = for_each_loose_file_in_objdir_buf(&buf, obj_cb, cruft_cb, | |
2472 | subdir_cb, data); | |
27e1e22d | 2473 | strbuf_release(&buf); |
e6f875e0 | 2474 | |
27e1e22d JK |
2475 | return r; |
2476 | } | |
660c889e | 2477 | |
a7ff6f5a JK |
2478 | int for_each_loose_object(each_loose_object_fn cb, void *data, |
2479 | enum for_each_object_flags flags) | |
660c889e | 2480 | { |
f0eaf638 | 2481 | struct object_directory *odb; |
b0a42642 | 2482 | |
f0eaf638 JK |
2483 | prepare_alt_odb(the_repository); |
2484 | for (odb = the_repository->objects->odb; odb; odb = odb->next) { | |
2485 | int r = for_each_loose_file_in_objdir(odb->path, cb, NULL, | |
2486 | NULL, data); | |
2487 | if (r) | |
2488 | return r; | |
660c889e | 2489 | |
f0eaf638 JK |
2490 | if (flags & FOR_EACH_OBJECT_LOCAL_ONLY) |
2491 | break; | |
2492 | } | |
1385bb7b | 2493 | |
f0eaf638 | 2494 | return 0; |
660c889e JK |
2495 | } |
2496 | ||
3a2e0824 JK |
2497 | static int append_loose_object(const struct object_id *oid, const char *path, |
2498 | void *data) | |
660c889e | 2499 | { |
92d8ed8a | 2500 | oidtree_insert(data, oid); |
3a2e0824 JK |
2501 | return 0; |
2502 | } | |
660c889e | 2503 | |
92d8ed8a | 2504 | struct oidtree *odb_loose_cache(struct object_directory *odb, |
0000d654 RS |
2505 | const struct object_id *oid) |
2506 | { | |
2507 | int subdir_nr = oid->hash[0]; | |
3a2e0824 | 2508 | struct strbuf buf = STRBUF_INIT; |
33f379ee EW |
2509 | size_t word_bits = bitsizeof(odb->loose_objects_subdir_seen[0]); |
2510 | size_t word_index = subdir_nr / word_bits; | |
26de1fc0 | 2511 | size_t mask = (size_t)1u << (subdir_nr % word_bits); |
33f379ee | 2512 | uint32_t *bitmap; |
660c889e | 2513 | |
3a2e0824 | 2514 | if (subdir_nr < 0 || |
33f379ee | 2515 | subdir_nr >= bitsizeof(odb->loose_objects_subdir_seen)) |
3a2e0824 | 2516 | BUG("subdir_nr out of range"); |
1385bb7b | 2517 | |
33f379ee EW |
2518 | bitmap = &odb->loose_objects_subdir_seen[word_index]; |
2519 | if (*bitmap & mask) | |
92d8ed8a EW |
2520 | return odb->loose_objects_cache; |
2521 | if (!odb->loose_objects_cache) { | |
2522 | ALLOC_ARRAY(odb->loose_objects_cache, 1); | |
2523 | oidtree_init(odb->loose_objects_cache); | |
2524 | } | |
3a2e0824 JK |
2525 | strbuf_addstr(&buf, odb->path); |
2526 | for_each_file_in_obj_subdir(subdir_nr, &buf, | |
2527 | append_loose_object, | |
2528 | NULL, NULL, | |
92d8ed8a | 2529 | odb->loose_objects_cache); |
33f379ee | 2530 | *bitmap |= mask; |
7317aa71 | 2531 | strbuf_release(&buf); |
92d8ed8a | 2532 | return odb->loose_objects_cache; |
660c889e JK |
2533 | } |
2534 | ||
d4e19e51 RS |
2535 | void odb_clear_loose_cache(struct object_directory *odb) |
2536 | { | |
92d8ed8a EW |
2537 | oidtree_clear(odb->loose_objects_cache); |
2538 | FREE_AND_NULL(odb->loose_objects_cache); | |
d4e19e51 RS |
2539 | memset(&odb->loose_objects_subdir_seen, 0, |
2540 | sizeof(odb->loose_objects_subdir_seen)); | |
2541 | } | |
2542 | ||
00a7760e JK |
2543 | static int check_stream_oid(git_zstream *stream, |
2544 | const char *hdr, | |
2545 | unsigned long size, | |
2546 | const char *path, | |
2547 | const struct object_id *expected_oid) | |
f6371f92 | 2548 | { |
18e2588e | 2549 | git_hash_ctx c; |
00a7760e | 2550 | struct object_id real_oid; |
f6371f92 JK |
2551 | unsigned char buf[4096]; |
2552 | unsigned long total_read; | |
2553 | int status = Z_OK; | |
2554 | ||
18e2588e | 2555 | the_hash_algo->init_fn(&c); |
2556 | the_hash_algo->update_fn(&c, hdr, stream->total_out); | |
f6371f92 JK |
2557 | |
2558 | /* | |
2559 | * We already read some bytes into hdr, but the ones up to the NUL | |
2560 | * do not count against the object's content size. | |
2561 | */ | |
2562 | total_read = stream->total_out - strlen(hdr) - 1; | |
2563 | ||
2564 | /* | |
2565 | * This size comparison must be "<=" to read the final zlib packets; | |
00a7760e | 2566 | * see the comment in unpack_loose_rest for details. |
f6371f92 JK |
2567 | */ |
2568 | while (total_read <= size && | |
18ad13e5 JH |
2569 | (status == Z_OK || |
2570 | (status == Z_BUF_ERROR && !stream->avail_out))) { | |
f6371f92 JK |
2571 | stream->next_out = buf; |
2572 | stream->avail_out = sizeof(buf); | |
2573 | if (size - total_read < stream->avail_out) | |
2574 | stream->avail_out = size - total_read; | |
2575 | status = git_inflate(stream, Z_FINISH); | |
18e2588e | 2576 | the_hash_algo->update_fn(&c, buf, stream->next_out - buf); |
f6371f92 JK |
2577 | total_read += stream->next_out - buf; |
2578 | } | |
2579 | git_inflate_end(stream); | |
2580 | ||
2581 | if (status != Z_STREAM_END) { | |
00a7760e | 2582 | error(_("corrupt loose object '%s'"), oid_to_hex(expected_oid)); |
f6371f92 JK |
2583 | return -1; |
2584 | } | |
cce044df | 2585 | if (stream->avail_in) { |
259328b7 | 2586 | error(_("garbage at end of loose object '%s'"), |
00a7760e | 2587 | oid_to_hex(expected_oid)); |
cce044df JK |
2588 | return -1; |
2589 | } | |
f6371f92 | 2590 | |
5951bf46 | 2591 | the_hash_algo->final_oid_fn(&real_oid, &c); |
00a7760e | 2592 | if (!oideq(expected_oid, &real_oid)) { |
01f8d594 | 2593 | error(_("hash mismatch for %s (expected %s)"), path, |
00a7760e | 2594 | oid_to_hex(expected_oid)); |
f6371f92 JK |
2595 | return -1; |
2596 | } | |
2597 | ||
2598 | return 0; | |
2599 | } | |
2600 | ||
2601 | int read_loose_object(const char *path, | |
d61d87bd | 2602 | const struct object_id *expected_oid, |
96e41f58 | 2603 | struct object_id *real_oid, |
31deb28f ÆAB |
2604 | void **contents, |
2605 | struct object_info *oi) | |
f6371f92 JK |
2606 | { |
2607 | int ret = -1; | |
f6371f92 JK |
2608 | void *map = NULL; |
2609 | unsigned long mapsize; | |
2610 | git_zstream stream; | |
1af64f73 | 2611 | char hdr[MAX_HEADER_LEN]; |
31deb28f | 2612 | unsigned long *size = oi->sizep; |
f6371f92 | 2613 | |
514c5fdd | 2614 | map = map_loose_object_1(the_repository, path, NULL, &mapsize); |
f6371f92 | 2615 | if (!map) { |
259328b7 | 2616 | error_errno(_("unable to mmap %s"), path); |
f6371f92 JK |
2617 | goto out; |
2618 | } | |
2619 | ||
01cab976 ÆAB |
2620 | if (unpack_loose_header(&stream, map, mapsize, hdr, sizeof(hdr), |
2621 | NULL) < 0) { | |
259328b7 | 2622 | error(_("unable to unpack header of %s"), path); |
f6371f92 JK |
2623 | goto out; |
2624 | } | |
2625 | ||
31deb28f | 2626 | if (parse_loose_header(hdr, oi) < 0) { |
259328b7 | 2627 | error(_("unable to parse header of %s"), path); |
f6371f92 JK |
2628 | git_inflate_end(&stream); |
2629 | goto out; | |
2630 | } | |
2631 | ||
31deb28f | 2632 | if (*oi->typep == OBJ_BLOB && *size > big_file_threshold) { |
00a7760e | 2633 | if (check_stream_oid(&stream, hdr, *size, path, expected_oid) < 0) |
f6371f92 JK |
2634 | goto out; |
2635 | } else { | |
00a7760e | 2636 | *contents = unpack_loose_rest(&stream, hdr, *size, expected_oid); |
f6371f92 | 2637 | if (!*contents) { |
259328b7 | 2638 | error(_("unable to unpack contents of %s"), path); |
f6371f92 JK |
2639 | git_inflate_end(&stream); |
2640 | goto out; | |
2641 | } | |
44439c1c | 2642 | hash_object_file_literally(the_repository->hash_algo, |
16235e3b | 2643 | *contents, *size, |
44439c1c | 2644 | oi->type_name->buf, real_oid); |
0f156dbb | 2645 | if (!oideq(expected_oid, real_oid)) |
f6371f92 | 2646 | goto out; |
f6371f92 JK |
2647 | } |
2648 | ||
2649 | ret = 0; /* everything checks out */ | |
2650 | ||
2651 | out: | |
2652 | if (map) | |
2653 | munmap(map, mapsize); | |
f6371f92 JK |
2654 | return ret; |
2655 | } |