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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 | */ | |
5e3f94df | 9 | #include "git-compat-util.h" |
0b027f6c | 10 | #include "abspath.h" |
b2141fc1 | 11 | #include "config.h" |
73359a9b | 12 | #include "convert.h" |
32a8f510 | 13 | #include "environment.h" |
f394e093 | 14 | #include "gettext.h" |
41771fa4 | 15 | #include "hex.h" |
6eac50d8 | 16 | #include "string-list.h" |
697cc8ef | 17 | #include "lockfile.h" |
a733cb60 | 18 | #include "pack.h" |
8e440259 | 19 | #include "commit.h" |
4dd1fbc7 | 20 | #include "run-command.h" |
f35a6d3b | 21 | #include "refs.h" |
568508e7 | 22 | #include "bulk-checkin.h" |
031dc927 | 23 | #include "repository.h" |
47f351e9 | 24 | #include "replace-object.h" |
090ea126 | 25 | #include "streaming.h" |
543c5caa | 26 | #include "dir.h" |
12d95ef6 | 27 | #include "list.h" |
cf3c6352 | 28 | #include "quote.h" |
4f39cd82 | 29 | #include "packfile.h" |
87bed179 | 30 | #include "object-file.h" |
90c62155 | 31 | #include "object-store.h" |
e3d2f20e | 32 | #include "oidtree.h" |
c339932b | 33 | #include "path.h" |
b14ed5ad | 34 | #include "promisor-remote.h" |
e38da487 | 35 | #include "setup.h" |
a35e03de | 36 | #include "submodule.h" |
69bbbe48 | 37 | #include "fsck.h" |
63a6745a EB |
38 | #include "loose.h" |
39 | #include "object-file-convert.h" | |
e05db0fd | 40 | |
1af64f73 | 41 | /* The maximum size for an object header. */ |
42 | #define MAX_HEADER_LEN 32 | |
43 | ||
e1ccd7e2 | 44 | |
45 | #define EMPTY_TREE_SHA1_BIN_LITERAL \ | |
46 | "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ | |
47 | "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" | |
13eeedb5 | 48 | #define EMPTY_TREE_SHA256_BIN_LITERAL \ |
49 | "\x6e\xf1\x9b\x41\x22\x5c\x53\x69\xf1\xc1" \ | |
50 | "\x04\xd4\x5d\x8d\x85\xef\xa9\xb0\x57\xb5" \ | |
51 | "\x3b\x14\xb4\xb9\xb9\x39\xdd\x74\xde\xcc" \ | |
52 | "\x53\x21" | |
e1ccd7e2 | 53 | |
54 | #define EMPTY_BLOB_SHA1_BIN_LITERAL \ | |
55 | "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ | |
56 | "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" | |
13eeedb5 | 57 | #define EMPTY_BLOB_SHA256_BIN_LITERAL \ |
58 | "\x47\x3a\x0f\x4c\x3b\xe8\xa9\x36\x81\xa2" \ | |
59 | "\x67\xe3\xb1\xe9\xa7\xdc\xda\x11\x85\x43" \ | |
60 | "\x6f\xe1\x41\xf7\x74\x91\x20\xa3\x03\x72" \ | |
61 | "\x18\x13" | |
e1ccd7e2 | 62 | |
e1ccd7e2 | 63 | static const struct object_id empty_tree_oid = { |
5a6dce70 | 64 | .hash = EMPTY_TREE_SHA1_BIN_LITERAL, |
65 | .algo = GIT_HASH_SHA1, | |
8576fde6 | 66 | }; |
e1ccd7e2 | 67 | static const struct object_id empty_blob_oid = { |
5a6dce70 | 68 | .hash = EMPTY_BLOB_SHA1_BIN_LITERAL, |
69 | .algo = GIT_HASH_SHA1, | |
8576fde6 | 70 | }; |
14228447 | 71 | static const struct object_id null_oid_sha1 = { |
72 | .hash = {0}, | |
73 | .algo = GIT_HASH_SHA1, | |
74 | }; | |
13eeedb5 | 75 | static const struct object_id empty_tree_oid_sha256 = { |
5a6dce70 | 76 | .hash = EMPTY_TREE_SHA256_BIN_LITERAL, |
77 | .algo = GIT_HASH_SHA256, | |
13eeedb5 | 78 | }; |
79 | static const struct object_id empty_blob_oid_sha256 = { | |
5a6dce70 | 80 | .hash = EMPTY_BLOB_SHA256_BIN_LITERAL, |
81 | .algo = GIT_HASH_SHA256, | |
13eeedb5 | 82 | }; |
14228447 | 83 | static const struct object_id null_oid_sha256 = { |
84 | .hash = {0}, | |
85 | .algo = GIT_HASH_SHA256, | |
86 | }; | |
88cd621d | 87 | |
ac73cedf | 88 | static void git_hash_sha1_init(git_hash_ctx *ctx) |
f50e766b | 89 | { |
ac73cedf | 90 | git_SHA1_Init(&ctx->sha1); |
f50e766b | 91 | } |
92 | ||
768e30ea | 93 | static void git_hash_sha1_clone(git_hash_ctx *dst, const git_hash_ctx *src) |
94 | { | |
95 | git_SHA1_Clone(&dst->sha1, &src->sha1); | |
96 | } | |
97 | ||
ac73cedf | 98 | static void git_hash_sha1_update(git_hash_ctx *ctx, const void *data, size_t len) |
f50e766b | 99 | { |
ac73cedf | 100 | git_SHA1_Update(&ctx->sha1, data, len); |
f50e766b | 101 | } |
102 | ||
ac73cedf | 103 | static void git_hash_sha1_final(unsigned char *hash, git_hash_ctx *ctx) |
f50e766b | 104 | { |
ac73cedf | 105 | git_SHA1_Final(hash, &ctx->sha1); |
f50e766b | 106 | } |
107 | ||
ab795f0d | 108 | static void git_hash_sha1_final_oid(struct object_id *oid, git_hash_ctx *ctx) |
109 | { | |
110 | git_SHA1_Final(oid->hash, &ctx->sha1); | |
111 | memset(oid->hash + GIT_SHA1_RAWSZ, 0, GIT_MAX_RAWSZ - GIT_SHA1_RAWSZ); | |
5a6dce70 | 112 | oid->algo = GIT_HASH_SHA1; |
ab795f0d | 113 | } |
114 | ||
13eeedb5 | 115 | |
116 | static void git_hash_sha256_init(git_hash_ctx *ctx) | |
117 | { | |
118 | git_SHA256_Init(&ctx->sha256); | |
119 | } | |
120 | ||
768e30ea | 121 | static void git_hash_sha256_clone(git_hash_ctx *dst, const git_hash_ctx *src) |
122 | { | |
123 | git_SHA256_Clone(&dst->sha256, &src->sha256); | |
124 | } | |
125 | ||
13eeedb5 | 126 | static void git_hash_sha256_update(git_hash_ctx *ctx, const void *data, size_t len) |
127 | { | |
128 | git_SHA256_Update(&ctx->sha256, data, len); | |
129 | } | |
130 | ||
131 | static void git_hash_sha256_final(unsigned char *hash, git_hash_ctx *ctx) | |
132 | { | |
133 | git_SHA256_Final(hash, &ctx->sha256); | |
134 | } | |
135 | ||
ab795f0d | 136 | static void git_hash_sha256_final_oid(struct object_id *oid, git_hash_ctx *ctx) |
137 | { | |
138 | git_SHA256_Final(oid->hash, &ctx->sha256); | |
139 | /* | |
140 | * This currently does nothing, so the compiler should optimize it out, | |
141 | * but keep it in case we extend the hash size again. | |
142 | */ | |
143 | memset(oid->hash + GIT_SHA256_RAWSZ, 0, GIT_MAX_RAWSZ - GIT_SHA256_RAWSZ); | |
5a6dce70 | 144 | oid->algo = GIT_HASH_SHA256; |
ab795f0d | 145 | } |
146 | ||
9eb6cdad | 147 | static void git_hash_unknown_init(git_hash_ctx *ctx UNUSED) |
f50e766b | 148 | { |
1a07e59c | 149 | BUG("trying to init unknown hash"); |
f50e766b | 150 | } |
151 | ||
9eb6cdad JK |
152 | static void git_hash_unknown_clone(git_hash_ctx *dst UNUSED, |
153 | const git_hash_ctx *src UNUSED) | |
768e30ea | 154 | { |
155 | BUG("trying to clone unknown hash"); | |
156 | } | |
157 | ||
9eb6cdad JK |
158 | static void git_hash_unknown_update(git_hash_ctx *ctx UNUSED, |
159 | const void *data UNUSED, | |
160 | size_t len UNUSED) | |
f50e766b | 161 | { |
1a07e59c | 162 | BUG("trying to update unknown hash"); |
f50e766b | 163 | } |
164 | ||
9eb6cdad JK |
165 | static void git_hash_unknown_final(unsigned char *hash UNUSED, |
166 | git_hash_ctx *ctx UNUSED) | |
f50e766b | 167 | { |
1a07e59c | 168 | BUG("trying to finalize unknown hash"); |
f50e766b | 169 | } |
170 | ||
9eb6cdad JK |
171 | static void git_hash_unknown_final_oid(struct object_id *oid UNUSED, |
172 | git_hash_ctx *ctx UNUSED) | |
ab795f0d | 173 | { |
174 | BUG("trying to finalize unknown hash"); | |
175 | } | |
176 | ||
f50e766b | 177 | const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = { |
178 | { | |
0cb9872e ÆAB |
179 | .name = NULL, |
180 | .format_id = 0x00000000, | |
181 | .rawsz = 0, | |
182 | .hexsz = 0, | |
183 | .blksz = 0, | |
184 | .init_fn = git_hash_unknown_init, | |
185 | .clone_fn = git_hash_unknown_clone, | |
186 | .update_fn = git_hash_unknown_update, | |
187 | .final_fn = git_hash_unknown_final, | |
188 | .final_oid_fn = git_hash_unknown_final_oid, | |
189 | .empty_tree = NULL, | |
190 | .empty_blob = NULL, | |
191 | .null_oid = NULL, | |
f50e766b | 192 | }, |
193 | { | |
0cb9872e ÆAB |
194 | .name = "sha1", |
195 | .format_id = GIT_SHA1_FORMAT_ID, | |
196 | .rawsz = GIT_SHA1_RAWSZ, | |
197 | .hexsz = GIT_SHA1_HEXSZ, | |
198 | .blksz = GIT_SHA1_BLKSZ, | |
199 | .init_fn = git_hash_sha1_init, | |
200 | .clone_fn = git_hash_sha1_clone, | |
201 | .update_fn = git_hash_sha1_update, | |
202 | .final_fn = git_hash_sha1_final, | |
203 | .final_oid_fn = git_hash_sha1_final_oid, | |
204 | .empty_tree = &empty_tree_oid, | |
205 | .empty_blob = &empty_blob_oid, | |
206 | .null_oid = &null_oid_sha1, | |
f50e766b | 207 | }, |
13eeedb5 | 208 | { |
0cb9872e ÆAB |
209 | .name = "sha256", |
210 | .format_id = GIT_SHA256_FORMAT_ID, | |
211 | .rawsz = GIT_SHA256_RAWSZ, | |
212 | .hexsz = GIT_SHA256_HEXSZ, | |
213 | .blksz = GIT_SHA256_BLKSZ, | |
214 | .init_fn = git_hash_sha256_init, | |
215 | .clone_fn = git_hash_sha256_clone, | |
216 | .update_fn = git_hash_sha256_update, | |
217 | .final_fn = git_hash_sha256_final, | |
218 | .final_oid_fn = git_hash_sha256_final_oid, | |
219 | .empty_tree = &empty_tree_oid_sha256, | |
220 | .empty_blob = &empty_blob_oid_sha256, | |
221 | .null_oid = &null_oid_sha256, | |
13eeedb5 | 222 | } |
f50e766b | 223 | }; |
224 | ||
14228447 | 225 | const struct object_id *null_oid(void) |
226 | { | |
227 | return the_hash_algo->null_oid; | |
228 | } | |
229 | ||
d8a92ced | 230 | const char *empty_tree_oid_hex(void) |
231 | { | |
232 | static char buf[GIT_MAX_HEXSZ + 1]; | |
233 | return oid_to_hex_r(buf, the_hash_algo->empty_tree); | |
234 | } | |
235 | ||
236 | const char *empty_blob_oid_hex(void) | |
237 | { | |
238 | static char buf[GIT_MAX_HEXSZ + 1]; | |
239 | return oid_to_hex_r(buf, the_hash_algo->empty_blob); | |
240 | } | |
241 | ||
2f90b9d9 | 242 | int hash_algo_by_name(const char *name) |
243 | { | |
244 | int i; | |
245 | if (!name) | |
246 | return GIT_HASH_UNKNOWN; | |
247 | for (i = 1; i < GIT_HASH_NALGOS; i++) | |
248 | if (!strcmp(name, hash_algos[i].name)) | |
249 | return i; | |
250 | return GIT_HASH_UNKNOWN; | |
251 | } | |
252 | ||
253 | int hash_algo_by_id(uint32_t format_id) | |
254 | { | |
255 | int i; | |
256 | for (i = 1; i < GIT_HASH_NALGOS; i++) | |
257 | if (format_id == hash_algos[i].format_id) | |
258 | return i; | |
259 | return GIT_HASH_UNKNOWN; | |
260 | } | |
261 | ||
95399788 | 262 | int hash_algo_by_length(int len) |
263 | { | |
264 | int i; | |
265 | for (i = 1; i < GIT_HASH_NALGOS; i++) | |
266 | if (len == hash_algos[i].rawsz) | |
267 | return i; | |
268 | return GIT_HASH_UNKNOWN; | |
269 | } | |
2f90b9d9 | 270 | |
c597ba80 NTND |
271 | /* |
272 | * This is meant to hold a *small* number of objects that you would | |
c7c33f50 | 273 | * want repo_read_object_file() to be able to return, but yet you do not want |
c597ba80 NTND |
274 | * to write them into the object store (e.g. a browse-only |
275 | * application). | |
276 | */ | |
277 | static struct cached_object { | |
62ba93ea | 278 | struct object_id oid; |
c597ba80 NTND |
279 | enum object_type type; |
280 | void *buf; | |
281 | unsigned long size; | |
282 | } *cached_objects; | |
283 | static int cached_object_nr, cached_object_alloc; | |
284 | ||
285 | static struct cached_object empty_tree = { | |
50103649 ÆAB |
286 | .oid = { |
287 | .hash = EMPTY_TREE_SHA1_BIN_LITERAL, | |
288 | }, | |
289 | .type = OBJ_TREE, | |
290 | .buf = "", | |
c597ba80 NTND |
291 | }; |
292 | ||
62ba93ea | 293 | static struct cached_object *find_cached_object(const struct object_id *oid) |
c597ba80 NTND |
294 | { |
295 | int i; | |
296 | struct cached_object *co = cached_objects; | |
297 | ||
298 | for (i = 0; i < cached_object_nr; i++, co++) { | |
4a7e27e9 | 299 | if (oideq(&co->oid, oid)) |
c597ba80 NTND |
300 | return co; |
301 | } | |
4a7e27e9 | 302 | if (oideq(oid, the_hash_algo->empty_tree)) |
c597ba80 NTND |
303 | return &empty_tree; |
304 | return NULL; | |
305 | } | |
306 | ||
9472935d | 307 | |
8462ff43 | 308 | static int get_conv_flags(unsigned flags) |
9472935d TB |
309 | { |
310 | if (flags & HASH_RENORMALIZE) | |
8462ff43 | 311 | return CONV_EOL_RENORMALIZE; |
9472935d | 312 | else if (flags & HASH_WRITE_OBJECT) |
107642fe | 313 | return global_conv_flags_eol | CONV_WRITE_OBJECT; |
9472935d | 314 | else |
8462ff43 | 315 | return 0; |
9472935d TB |
316 | } |
317 | ||
318 | ||
90a6464b JH |
319 | int mkdir_in_gitdir(const char *path) |
320 | { | |
321 | if (mkdir(path, 0777)) { | |
322 | int saved_errno = errno; | |
323 | struct stat st; | |
324 | struct strbuf sb = STRBUF_INIT; | |
325 | ||
326 | if (errno != EEXIST) | |
327 | return -1; | |
328 | /* | |
329 | * Are we looking at a path in a symlinked worktree | |
330 | * whose original repository does not yet have it? | |
331 | * e.g. .git/rr-cache pointing at its original | |
332 | * repository in which the user hasn't performed any | |
333 | * conflict resolution yet? | |
334 | */ | |
335 | if (lstat(path, &st) || !S_ISLNK(st.st_mode) || | |
336 | strbuf_readlink(&sb, path, st.st_size) || | |
337 | !is_absolute_path(sb.buf) || | |
338 | mkdir(sb.buf, 0777)) { | |
339 | strbuf_release(&sb); | |
340 | errno = saved_errno; | |
341 | return -1; | |
342 | } | |
343 | strbuf_release(&sb); | |
344 | } | |
345 | return adjust_shared_perm(path); | |
346 | } | |
347 | ||
eb3c027e | 348 | static enum scld_error safe_create_leading_directories_1(char *path, int share) |
b2cb9425 | 349 | { |
26c8ae2a | 350 | char *next_component = path + offset_1st_component(path); |
0be0521b | 351 | enum scld_error ret = SCLD_OK; |
67d42212 | 352 | |
0be0521b | 353 | while (ret == SCLD_OK && next_component) { |
f0502332 | 354 | struct stat st; |
0f527403 | 355 | char *slash = next_component, slash_character; |
f0502332 | 356 | |
0f527403 MH |
357 | while (*slash && !is_dir_sep(*slash)) |
358 | slash++; | |
359 | ||
360 | if (!*slash) | |
b2cb9425 | 361 | break; |
bf10cf70 | 362 | |
26c8ae2a | 363 | next_component = slash + 1; |
0f527403 | 364 | while (is_dir_sep(*next_component)) |
bf10cf70 | 365 | next_component++; |
26c8ae2a | 366 | if (!*next_component) |
5f0bdf50 | 367 | break; |
831651fd | 368 | |
0f527403 | 369 | slash_character = *slash; |
831651fd | 370 | *slash = '\0'; |
67d42212 JR |
371 | if (!stat(path, &st)) { |
372 | /* path exists */ | |
204a047f MH |
373 | if (!S_ISDIR(st.st_mode)) { |
374 | errno = ENOTDIR; | |
0be0521b | 375 | ret = SCLD_EXISTS; |
204a047f | 376 | } |
53a39721 | 377 | } else if (mkdir(path, 0777)) { |
928734d9 | 378 | if (errno == EEXIST && |
9e6f885d | 379 | !stat(path, &st) && S_ISDIR(st.st_mode)) |
928734d9 | 380 | ; /* somebody created it since we checked */ |
18d37e86 MH |
381 | else if (errno == ENOENT) |
382 | /* | |
383 | * Either mkdir() failed because | |
384 | * somebody just pruned the containing | |
385 | * directory, or stat() failed because | |
386 | * the file that was in our way was | |
387 | * just removed. Either way, inform | |
388 | * the caller that it might be worth | |
389 | * trying again: | |
390 | */ | |
391 | ret = SCLD_VANISHED; | |
9e6f885d | 392 | else |
0be0521b | 393 | ret = SCLD_FAILED; |
eb3c027e | 394 | } else if (share && adjust_shared_perm(path)) { |
0be0521b | 395 | ret = SCLD_PERMS; |
457f06d6 | 396 | } |
0f527403 | 397 | *slash = slash_character; |
b2cb9425 | 398 | } |
9e6f885d | 399 | return ret; |
b2cb9425 | 400 | } |
723c31fe | 401 | |
eb3c027e MT |
402 | enum scld_error safe_create_leading_directories(char *path) |
403 | { | |
404 | return safe_create_leading_directories_1(path, 1); | |
405 | } | |
406 | ||
407 | enum scld_error safe_create_leading_directories_no_share(char *path) | |
408 | { | |
409 | return safe_create_leading_directories_1(path, 0); | |
410 | } | |
411 | ||
0be0521b | 412 | enum scld_error safe_create_leading_directories_const(const char *path) |
8e21d63b | 413 | { |
02944307 | 414 | int save_errno; |
8e21d63b JK |
415 | /* path points to cache entries, so xstrdup before messing with it */ |
416 | char *buf = xstrdup(path); | |
0be0521b | 417 | enum scld_error result = safe_create_leading_directories(buf); |
02944307 MH |
418 | |
419 | save_errno = errno; | |
8e21d63b | 420 | free(buf); |
02944307 | 421 | errno = save_errno; |
8e21d63b JK |
422 | return result; |
423 | } | |
424 | ||
514c5fdd | 425 | static void fill_loose_path(struct strbuf *buf, const struct object_id *oid) |
ace1534d JH |
426 | { |
427 | int i; | |
94b5e093 | 428 | for (i = 0; i < the_hash_algo->rawsz; i++) { |
ace1534d | 429 | static char hex[] = "0123456789abcdef"; |
514c5fdd | 430 | unsigned int val = oid->hash[i]; |
f7b7774f JK |
431 | strbuf_addch(buf, hex[val >> 4]); |
432 | strbuf_addch(buf, hex[val & 0xf]); | |
afbba2f0 | 433 | if (!i) |
f7b7774f | 434 | strbuf_addch(buf, '/'); |
ace1534d JH |
435 | } |
436 | } | |
437 | ||
f0eaf638 JK |
438 | static const char *odb_loose_path(struct object_directory *odb, |
439 | struct strbuf *buf, | |
514c5fdd | 440 | const struct object_id *oid) |
0fcfd160 | 441 | { |
b69fb867 | 442 | strbuf_reset(buf); |
f0eaf638 | 443 | strbuf_addstr(buf, odb->path); |
34498471 | 444 | strbuf_addch(buf, '/'); |
514c5fdd | 445 | fill_loose_path(buf, oid); |
f3f043a1 | 446 | return buf->buf; |
0fcfd160 LT |
447 | } |
448 | ||
f3f043a1 | 449 | const char *loose_object_path(struct repository *r, struct strbuf *buf, |
514c5fdd | 450 | const struct object_id *oid) |
29ec6af2 | 451 | { |
514c5fdd | 452 | return odb_loose_path(r->objects->odb, buf, oid); |
0fcfd160 LT |
453 | } |
454 | ||
4ea82473 JK |
455 | /* |
456 | * Return non-zero iff the path is usable as an alternate object database. | |
457 | */ | |
13313fc3 SB |
458 | static int alt_odb_usable(struct raw_object_store *o, |
459 | struct strbuf *path, | |
cf2dc1c2 | 460 | const char *normalized_objdir, khiter_t *pos) |
4ea82473 | 461 | { |
cf2dc1c2 | 462 | int r; |
4ea82473 JK |
463 | |
464 | /* Detect cases where alternate disappeared */ | |
465 | if (!is_directory(path->buf)) { | |
259328b7 NTND |
466 | error(_("object directory %s does not exist; " |
467 | "check .git/objects/info/alternates"), | |
4ea82473 JK |
468 | path->buf); |
469 | return 0; | |
470 | } | |
471 | ||
472 | /* | |
473 | * Prevent the common mistake of listing the same | |
474 | * thing twice, or object directory itself. | |
475 | */ | |
cf2dc1c2 EW |
476 | if (!o->odb_by_path) { |
477 | khiter_t p; | |
478 | ||
479 | o->odb_by_path = kh_init_odb_path_map(); | |
480 | assert(!o->odb->next); | |
481 | p = kh_put_odb_path_map(o->odb_by_path, o->odb->path, &r); | |
482 | assert(r == 1); /* never used */ | |
483 | kh_value(o->odb_by_path, p) = o->odb; | |
4ea82473 | 484 | } |
cf2dc1c2 | 485 | if (fspatheq(path->buf, normalized_objdir)) |
4ea82473 | 486 | return 0; |
cf2dc1c2 EW |
487 | *pos = kh_put_odb_path_map(o->odb_by_path, path->buf, &r); |
488 | /* r: 0 = exists, 1 = never used, 2 = deleted */ | |
489 | return r == 0 ? 0 : 1; | |
4ea82473 JK |
490 | } |
491 | ||
ddd5d056 JH |
492 | /* |
493 | * Prepare alternate object database registry. | |
d5a63b99 JH |
494 | * |
495 | * The variable alt_odb_list points at the list of struct | |
263db403 | 496 | * object_directory. The elements on this list come from |
d5a63b99 JH |
497 | * non-empty elements from colon separated ALTERNATE_DB_ENVIRONMENT |
498 | * environment variable, and $GIT_OBJECT_DIRECTORY/info/alternates, | |
1494e038 JH |
499 | * whose contents is similar to that environment variable but can be |
500 | * LF separated. Its base points at a statically allocated buffer that | |
d5a63b99 JH |
501 | * contains "/the/directory/corresponding/to/.git/objects/...", while |
502 | * its name points just after the slash at the end of ".git/objects/" | |
e5afd444 MÅ |
503 | * in the example above, and has enough space to hold all hex characters |
504 | * of the object ID, an extra slash for the first level indirection, and | |
505 | * the terminating NUL. | |
ddd5d056 | 506 | */ |
77f012e8 SB |
507 | static void read_info_alternates(struct repository *r, |
508 | const char *relative_base, | |
509 | int depth); | |
407532f8 | 510 | static int link_alt_odb_entry(struct repository *r, const struct strbuf *entry, |
cfc62fc9 | 511 | const char *relative_base, int depth, const char *normalized_objdir) |
ace1534d | 512 | { |
263db403 | 513 | struct object_directory *ent; |
5bdf0a84 | 514 | struct strbuf pathbuf = STRBUF_INIT; |
199337d6 | 515 | struct strbuf tmp = STRBUF_INIT; |
cf2dc1c2 | 516 | khiter_t pos; |
199337d6 | 517 | int ret = -1; |
d5a63b99 | 518 | |
407532f8 | 519 | if (!is_absolute_path(entry->buf) && relative_base) { |
4ac9006f | 520 | strbuf_realpath(&pathbuf, relative_base, 1); |
5bdf0a84 | 521 | strbuf_addch(&pathbuf, '/'); |
c2f493a4 | 522 | } |
407532f8 | 523 | strbuf_addbuf(&pathbuf, entry); |
c2f493a4 | 524 | |
199337d6 | 525 | if (!strbuf_realpath(&tmp, pathbuf.buf, 0)) { |
259328b7 | 526 | error(_("unable to normalize alternate object path: %s"), |
670c359d | 527 | pathbuf.buf); |
199337d6 | 528 | goto error; |
670c359d | 529 | } |
199337d6 | 530 | strbuf_swap(&pathbuf, &tmp); |
5bdf0a84 HW |
531 | |
532 | /* | |
533 | * The trailing slash after the directory name is given by | |
534 | * this function at the end. Remove duplicates. | |
535 | */ | |
4ea82473 JK |
536 | while (pathbuf.len && pathbuf.buf[pathbuf.len - 1] == '/') |
537 | strbuf_setlen(&pathbuf, pathbuf.len - 1); | |
5bdf0a84 | 538 | |
199337d6 GC |
539 | if (!alt_odb_usable(r->objects, &pathbuf, normalized_objdir, &pos)) |
540 | goto error; | |
c2f493a4 | 541 | |
ca56dadb | 542 | CALLOC_ARRAY(ent, 1); |
cf2dc1c2 EW |
543 | /* pathbuf.buf is already in r->objects->odb_by_path */ |
544 | ent->path = strbuf_detach(&pathbuf, NULL); | |
c2f493a4 MW |
545 | |
546 | /* add the alternate entry */ | |
f0eaf638 JK |
547 | *r->objects->odb_tail = ent; |
548 | r->objects->odb_tail = &(ent->next); | |
c2f493a4 | 549 | ent->next = NULL; |
cf2dc1c2 EW |
550 | assert(r->objects->odb_by_path); |
551 | kh_value(r->objects->odb_by_path, pos) = ent; | |
c2f493a4 MW |
552 | |
553 | /* recursively add alternates */ | |
cf2dc1c2 | 554 | read_info_alternates(r, ent->path, depth + 1); |
199337d6 GC |
555 | ret = 0; |
556 | error: | |
557 | strbuf_release(&tmp); | |
558 | strbuf_release(&pathbuf); | |
559 | return ret; | |
c2f493a4 MW |
560 | } |
561 | ||
cf3c6352 JK |
562 | static const char *parse_alt_odb_entry(const char *string, |
563 | int sep, | |
564 | struct strbuf *out) | |
565 | { | |
566 | const char *end; | |
567 | ||
568 | strbuf_reset(out); | |
569 | ||
570 | if (*string == '#') { | |
571 | /* comment; consume up to next separator */ | |
572 | end = strchrnul(string, sep); | |
573 | } else if (*string == '"' && !unquote_c_style(out, string, &end)) { | |
574 | /* | |
575 | * quoted path; unquote_c_style has copied the | |
576 | * data for us and set "end". Broken quoting (e.g., | |
577 | * an entry that doesn't end with a quote) falls | |
578 | * back to the unquoted case below. | |
579 | */ | |
580 | } else { | |
581 | /* normal, unquoted path */ | |
582 | end = strchrnul(string, sep); | |
583 | strbuf_add(out, string, end - string); | |
584 | } | |
585 | ||
586 | if (*end) | |
587 | end++; | |
588 | return end; | |
589 | } | |
590 | ||
77f012e8 SB |
591 | static void link_alt_odb_entries(struct repository *r, const char *alt, |
592 | int sep, const char *relative_base, int depth) | |
c2f493a4 | 593 | { |
539e7506 | 594 | struct strbuf objdirbuf = STRBUF_INIT; |
cf3c6352 | 595 | struct strbuf entry = STRBUF_INIT; |
c2f493a4 | 596 | |
f28e3668 JK |
597 | if (!alt || !*alt) |
598 | return; | |
599 | ||
c2f493a4 | 600 | if (depth > 5) { |
259328b7 | 601 | error(_("%s: ignoring alternate object stores, nesting too deep"), |
c2f493a4 MW |
602 | relative_base); |
603 | return; | |
604 | } | |
605 | ||
199337d6 | 606 | strbuf_realpath(&objdirbuf, r->objects->odb->path, 1); |
539e7506 | 607 | |
cf3c6352 JK |
608 | while (*alt) { |
609 | alt = parse_alt_odb_entry(alt, sep, &entry); | |
610 | if (!entry.len) | |
9577e7e3 | 611 | continue; |
407532f8 | 612 | link_alt_odb_entry(r, &entry, |
cfc62fc9 | 613 | relative_base, depth, objdirbuf.buf); |
9577e7e3 | 614 | } |
cf3c6352 | 615 | strbuf_release(&entry); |
539e7506 | 616 | strbuf_release(&objdirbuf); |
d5a63b99 JH |
617 | } |
618 | ||
77f012e8 SB |
619 | static void read_info_alternates(struct repository *r, |
620 | const char *relative_base, | |
621 | int depth) | |
d5a63b99 | 622 | { |
5015f01c | 623 | char *path; |
dc732bd5 | 624 | struct strbuf buf = STRBUF_INIT; |
d5a63b99 | 625 | |
5015f01c | 626 | path = xstrfmt("%s/info/alternates", relative_base); |
dc732bd5 | 627 | if (strbuf_read_file(&buf, path, 1024) < 0) { |
f0f7bebe | 628 | warn_on_fopen_errors(path); |
dc732bd5 | 629 | free(path); |
9a217f2a | 630 | return; |
ace1534d | 631 | } |
d5a63b99 | 632 | |
77f012e8 | 633 | link_alt_odb_entries(r, buf.buf, '\n', relative_base, depth); |
dc732bd5 JK |
634 | strbuf_release(&buf); |
635 | free(path); | |
ace1534d JH |
636 | } |
637 | ||
bef70b22 DB |
638 | void add_to_alternates_file(const char *reference) |
639 | { | |
f132a127 | 640 | struct lock_file lock = LOCK_INIT; |
77b9b1d1 JK |
641 | char *alts = git_pathdup("objects/info/alternates"); |
642 | FILE *in, *out; | |
f132a127 | 643 | int found = 0; |
77b9b1d1 | 644 | |
f132a127 MÅ |
645 | hold_lock_file_for_update(&lock, alts, LOCK_DIE_ON_ERROR); |
646 | out = fdopen_lock_file(&lock, "w"); | |
77b9b1d1 | 647 | if (!out) |
259328b7 | 648 | die_errno(_("unable to fdopen alternates lockfile")); |
77b9b1d1 JK |
649 | |
650 | in = fopen(alts, "r"); | |
651 | if (in) { | |
652 | struct strbuf line = STRBUF_INIT; | |
77b9b1d1 | 653 | |
3f163962 | 654 | while (strbuf_getline(&line, in) != EOF) { |
77b9b1d1 JK |
655 | if (!strcmp(reference, line.buf)) { |
656 | found = 1; | |
657 | break; | |
658 | } | |
659 | fprintf_or_die(out, "%s\n", line.buf); | |
660 | } | |
661 | ||
662 | strbuf_release(&line); | |
663 | fclose(in); | |
77b9b1d1 JK |
664 | } |
665 | else if (errno != ENOENT) | |
259328b7 | 666 | die_errno(_("unable to read alternates file")); |
77b9b1d1 | 667 | |
f132a127 MÅ |
668 | if (found) { |
669 | rollback_lock_file(&lock); | |
670 | } else { | |
77b9b1d1 | 671 | fprintf_or_die(out, "%s\n", reference); |
f132a127 | 672 | if (commit_lock_file(&lock)) |
259328b7 | 673 | die_errno(_("unable to move new alternates file into place")); |
f0eaf638 | 674 | if (the_repository->objects->loaded_alternates) |
93d8d1e2 SB |
675 | link_alt_odb_entries(the_repository, reference, |
676 | '\n', NULL, 0); | |
77b9b1d1 JK |
677 | } |
678 | free(alts); | |
bef70b22 DB |
679 | } |
680 | ||
a5b34d21 JK |
681 | void add_to_alternates_memory(const char *reference) |
682 | { | |
683 | /* | |
684 | * Make sure alternates are initialized, or else our entry may be | |
685 | * overwritten when they are. | |
686 | */ | |
0b209034 | 687 | prepare_alt_odb(the_repository); |
a5b34d21 | 688 | |
93d8d1e2 SB |
689 | link_alt_odb_entries(the_repository, reference, |
690 | '\n', NULL, 0); | |
a5b34d21 JK |
691 | } |
692 | ||
b3cecf49 NS |
693 | struct object_directory *set_temporary_primary_odb(const char *dir, int will_destroy) |
694 | { | |
695 | struct object_directory *new_odb; | |
696 | ||
697 | /* | |
698 | * Make sure alternates are initialized, or else our entry may be | |
699 | * overwritten when they are. | |
700 | */ | |
701 | prepare_alt_odb(the_repository); | |
702 | ||
703 | /* | |
704 | * Make a new primary odb and link the old primary ODB in as an | |
705 | * alternate | |
706 | */ | |
707 | new_odb = xcalloc(1, sizeof(*new_odb)); | |
708 | new_odb->path = xstrdup(dir); | |
ecd81dfc NS |
709 | |
710 | /* | |
711 | * Disable ref updates while a temporary odb is active, since | |
712 | * the objects in the database may roll back. | |
713 | */ | |
714 | new_odb->disable_ref_updates = 1; | |
b3cecf49 NS |
715 | new_odb->will_destroy = will_destroy; |
716 | new_odb->next = the_repository->objects->odb; | |
717 | the_repository->objects->odb = new_odb; | |
718 | return new_odb->next; | |
719 | } | |
720 | ||
721 | void restore_primary_odb(struct object_directory *restore_odb, const char *old_path) | |
722 | { | |
723 | struct object_directory *cur_odb = the_repository->objects->odb; | |
724 | ||
725 | if (strcmp(old_path, cur_odb->path)) | |
726 | BUG("expected %s as primary object store; found %s", | |
727 | old_path, cur_odb->path); | |
728 | ||
729 | if (cur_odb->next != restore_odb) | |
730 | BUG("we expect the old primary object store to be the first alternate"); | |
731 | ||
732 | the_repository->objects->odb = restore_odb; | |
733 | free_object_directory(cur_odb); | |
734 | } | |
735 | ||
9eeea7d2 SB |
736 | /* |
737 | * Compute the exact path an alternate is at and returns it. In case of | |
738 | * error NULL is returned and the human readable error is added to `err` | |
efde7b72 | 739 | * `path` may be relative and should point to $GIT_DIR. |
9eeea7d2 SB |
740 | * `err` must not be null. |
741 | */ | |
742 | char *compute_alternate_path(const char *path, struct strbuf *err) | |
743 | { | |
744 | char *ref_git = NULL; | |
4530a85b | 745 | const char *repo; |
9eeea7d2 SB |
746 | int seen_error = 0; |
747 | ||
4530a85b AM |
748 | ref_git = real_pathdup(path, 0); |
749 | if (!ref_git) { | |
9eeea7d2 SB |
750 | seen_error = 1; |
751 | strbuf_addf(err, _("path '%s' does not exist"), path); | |
752 | goto out; | |
4530a85b | 753 | } |
9eeea7d2 SB |
754 | |
755 | repo = read_gitfile(ref_git); | |
756 | if (!repo) | |
757 | repo = read_gitfile(mkpath("%s/.git", ref_git)); | |
758 | if (repo) { | |
759 | free(ref_git); | |
760 | ref_git = xstrdup(repo); | |
761 | } | |
762 | ||
763 | if (!repo && is_directory(mkpath("%s/.git/objects", ref_git))) { | |
764 | char *ref_git_git = mkpathdup("%s/.git", ref_git); | |
765 | free(ref_git); | |
766 | ref_git = ref_git_git; | |
767 | } else if (!is_directory(mkpath("%s/objects", ref_git))) { | |
768 | struct strbuf sb = STRBUF_INIT; | |
769 | seen_error = 1; | |
770 | if (get_common_dir(&sb, ref_git)) { | |
771 | strbuf_addf(err, | |
772 | _("reference repository '%s' as a linked " | |
773 | "checkout is not supported yet."), | |
774 | path); | |
775 | goto out; | |
776 | } | |
777 | ||
778 | strbuf_addf(err, _("reference repository '%s' is not a " | |
779 | "local repository."), path); | |
780 | goto out; | |
781 | } | |
782 | ||
783 | if (!access(mkpath("%s/shallow", ref_git), F_OK)) { | |
784 | strbuf_addf(err, _("reference repository '%s' is shallow"), | |
785 | path); | |
786 | seen_error = 1; | |
787 | goto out; | |
788 | } | |
789 | ||
790 | if (!access(mkpath("%s/info/grafts", ref_git), F_OK)) { | |
791 | strbuf_addf(err, | |
792 | _("reference repository '%s' is grafted"), | |
793 | path); | |
794 | seen_error = 1; | |
795 | goto out; | |
796 | } | |
797 | ||
798 | out: | |
799 | if (seen_error) { | |
6a83d902 | 800 | FREE_AND_NULL(ref_git); |
9eeea7d2 SB |
801 | } |
802 | ||
803 | return ref_git; | |
804 | } | |
805 | ||
f57a7396 TB |
806 | struct object_directory *find_odb(struct repository *r, const char *obj_dir) |
807 | { | |
808 | struct object_directory *odb; | |
809 | char *obj_dir_real = real_pathdup(obj_dir, 1); | |
810 | struct strbuf odb_path_real = STRBUF_INIT; | |
811 | ||
812 | prepare_alt_odb(r); | |
813 | for (odb = r->objects->odb; odb; odb = odb->next) { | |
814 | strbuf_realpath(&odb_path_real, odb->path, 1); | |
815 | if (!strcmp(obj_dir_real, odb_path_real.buf)) | |
816 | break; | |
817 | } | |
818 | ||
819 | free(obj_dir_real); | |
820 | strbuf_release(&odb_path_real); | |
821 | ||
822 | if (!odb) | |
823 | die(_("could not find object directory matching %s"), obj_dir); | |
824 | return odb; | |
825 | } | |
826 | ||
709dfa69 JK |
827 | static void fill_alternate_refs_command(struct child_process *cmd, |
828 | const char *repo_path) | |
829 | { | |
830 | const char *value; | |
831 | ||
832 | if (!git_config_get_value("core.alternateRefsCommand", &value)) { | |
833 | cmd->use_shell = 1; | |
834 | ||
c972bf4c JK |
835 | strvec_push(&cmd->args, value); |
836 | strvec_push(&cmd->args, repo_path); | |
709dfa69 JK |
837 | } else { |
838 | cmd->git_cmd = 1; | |
839 | ||
c972bf4c JK |
840 | strvec_pushf(&cmd->args, "--git-dir=%s", repo_path); |
841 | strvec_push(&cmd->args, "for-each-ref"); | |
842 | strvec_push(&cmd->args, "--format=%(objectname)"); | |
709dfa69 JK |
843 | |
844 | if (!git_config_get_value("core.alternateRefsPrefixes", &value)) { | |
c972bf4c JK |
845 | strvec_push(&cmd->args, "--"); |
846 | strvec_split(&cmd->args, value); | |
709dfa69 JK |
847 | } |
848 | } | |
849 | ||
29fda24d | 850 | strvec_pushv(&cmd->env, (const char **)local_repo_env); |
709dfa69 JK |
851 | cmd->out = -1; |
852 | } | |
853 | ||
854 | static void read_alternate_refs(const char *path, | |
855 | alternate_ref_fn *cb, | |
856 | void *data) | |
857 | { | |
858 | struct child_process cmd = CHILD_PROCESS_INIT; | |
859 | struct strbuf line = STRBUF_INIT; | |
860 | FILE *fh; | |
861 | ||
862 | fill_alternate_refs_command(&cmd, path); | |
863 | ||
864 | if (start_command(&cmd)) | |
865 | return; | |
866 | ||
867 | fh = xfdopen(cmd.out, "r"); | |
868 | while (strbuf_getline_lf(&line, fh) != EOF) { | |
869 | struct object_id oid; | |
870 | const char *p; | |
871 | ||
872 | if (parse_oid_hex(line.buf, &oid, &p) || *p) { | |
873 | warning(_("invalid line while parsing alternate refs: %s"), | |
874 | line.buf); | |
875 | break; | |
876 | } | |
877 | ||
878 | cb(&oid, data); | |
879 | } | |
880 | ||
881 | fclose(fh); | |
882 | finish_command(&cmd); | |
86ad3ea5 | 883 | strbuf_release(&line); |
709dfa69 JK |
884 | } |
885 | ||
886 | struct alternate_refs_data { | |
887 | alternate_ref_fn *fn; | |
888 | void *data; | |
889 | }; | |
890 | ||
891 | static int refs_from_alternate_cb(struct object_directory *e, | |
892 | void *data) | |
893 | { | |
894 | struct strbuf path = STRBUF_INIT; | |
895 | size_t base_len; | |
896 | struct alternate_refs_data *cb = data; | |
897 | ||
898 | if (!strbuf_realpath(&path, e->path, 0)) | |
899 | goto out; | |
900 | if (!strbuf_strip_suffix(&path, "/objects")) | |
901 | goto out; | |
902 | base_len = path.len; | |
903 | ||
904 | /* Is this a git repository with refs? */ | |
905 | strbuf_addstr(&path, "/refs"); | |
906 | if (!is_directory(path.buf)) | |
907 | goto out; | |
908 | strbuf_setlen(&path, base_len); | |
909 | ||
910 | read_alternate_refs(path.buf, cb->fn, cb->data); | |
911 | ||
912 | out: | |
913 | strbuf_release(&path); | |
914 | return 0; | |
915 | } | |
916 | ||
917 | void for_each_alternate_ref(alternate_ref_fn fn, void *data) | |
918 | { | |
919 | struct alternate_refs_data cb; | |
920 | cb.fn = fn; | |
921 | cb.data = data; | |
922 | foreach_alt_odb(refs_from_alternate_cb, &cb); | |
923 | } | |
924 | ||
fe1b2268 | 925 | int foreach_alt_odb(alt_odb_fn fn, void *cb) |
d79796bc | 926 | { |
263db403 | 927 | struct object_directory *ent; |
fe1b2268 | 928 | int r = 0; |
d79796bc | 929 | |
0b209034 | 930 | prepare_alt_odb(the_repository); |
f0eaf638 | 931 | for (ent = the_repository->objects->odb->next; ent; ent = ent->next) { |
fe1b2268 JK |
932 | r = fn(ent, cb); |
933 | if (r) | |
934 | break; | |
935 | } | |
936 | return r; | |
d79796bc JH |
937 | } |
938 | ||
13068bf0 | 939 | void prepare_alt_odb(struct repository *r) |
c2f493a4 | 940 | { |
f0eaf638 | 941 | if (r->objects->loaded_alternates) |
7dc24aa5 SP |
942 | return; |
943 | ||
13068bf0 | 944 | link_alt_odb_entries(r, r->objects->alternate_db, PATH_SEP, NULL, 0); |
c2f493a4 | 945 | |
f0eaf638 JK |
946 | read_info_alternates(r, r->objects->odb->path, 0); |
947 | r->objects->loaded_alternates = 1; | |
c2f493a4 MW |
948 | } |
949 | ||
d85cd187 PS |
950 | int has_alt_odb(struct repository *r) |
951 | { | |
952 | prepare_alt_odb(r); | |
953 | return !!r->objects->odb->next; | |
954 | } | |
955 | ||
3096b2ec | 956 | /* Returns 1 if we have successfully freshened the file, 0 otherwise. */ |
33d4221c | 957 | static int freshen_file(const char *fn) |
ace1534d | 958 | { |
312cd761 | 959 | return !utime(fn, NULL); |
0f4dc14a | 960 | } |
ace1534d | 961 | |
3096b2ec JK |
962 | /* |
963 | * All of the check_and_freshen functions return 1 if the file exists and was | |
964 | * freshened (if freshening was requested), 0 otherwise. If they return | |
965 | * 0, you should not assume that it is safe to skip a write of the object (it | |
966 | * either does not exist on disk, or has a stale mtime and may be subject to | |
967 | * pruning). | |
968 | */ | |
6a5e6f5e | 969 | int check_and_freshen_file(const char *fn, int freshen) |
33d4221c JK |
970 | { |
971 | if (access(fn, F_OK)) | |
972 | return 0; | |
3096b2ec | 973 | if (freshen && !freshen_file(fn)) |
33d4221c JK |
974 | return 0; |
975 | return 1; | |
976 | } | |
977 | ||
f0eaf638 JK |
978 | static int check_and_freshen_odb(struct object_directory *odb, |
979 | const struct object_id *oid, | |
980 | int freshen) | |
33d4221c | 981 | { |
f0eaf638 | 982 | static struct strbuf path = STRBUF_INIT; |
514c5fdd | 983 | odb_loose_path(odb, &path, oid); |
f0eaf638 JK |
984 | return check_and_freshen_file(path.buf, freshen); |
985 | } | |
ea657730 | 986 | |
f0eaf638 JK |
987 | static int check_and_freshen_local(const struct object_id *oid, int freshen) |
988 | { | |
989 | return check_and_freshen_odb(the_repository->objects->odb, oid, freshen); | |
33d4221c JK |
990 | } |
991 | ||
6862ebbf | 992 | static int check_and_freshen_nonlocal(const struct object_id *oid, int freshen) |
0f4dc14a | 993 | { |
263db403 | 994 | struct object_directory *odb; |
f3f043a1 | 995 | |
0b209034 | 996 | prepare_alt_odb(the_repository); |
f0eaf638 JK |
997 | for (odb = the_repository->objects->odb->next; odb; odb = odb->next) { |
998 | if (check_and_freshen_odb(odb, oid, freshen)) | |
c529d75a | 999 | return 1; |
ace1534d | 1000 | } |
c529d75a | 1001 | return 0; |
ace1534d JH |
1002 | } |
1003 | ||
6862ebbf | 1004 | static int check_and_freshen(const struct object_id *oid, int freshen) |
33d4221c | 1005 | { |
6862ebbf | 1006 | return check_and_freshen_local(oid, freshen) || |
1007 | check_and_freshen_nonlocal(oid, freshen); | |
33d4221c JK |
1008 | } |
1009 | ||
6862ebbf | 1010 | int has_loose_object_nonlocal(const struct object_id *oid) |
33d4221c | 1011 | { |
6862ebbf | 1012 | return check_and_freshen_nonlocal(oid, 0); |
33d4221c JK |
1013 | } |
1014 | ||
b7573536 | 1015 | int has_loose_object(const struct object_id *oid) |
0f4dc14a | 1016 | { |
6862ebbf | 1017 | return check_and_freshen(oid, 0); |
0f4dc14a BC |
1018 | } |
1019 | ||
02710228 SP |
1020 | static void mmap_limit_check(size_t length) |
1021 | { | |
1022 | static size_t limit = 0; | |
1023 | if (!limit) { | |
1024 | limit = git_env_ulong("GIT_MMAP_LIMIT", 0); | |
1025 | if (!limit) | |
1026 | limit = SIZE_MAX; | |
1027 | } | |
1028 | if (length > limit) | |
259328b7 | 1029 | die(_("attempting to mmap %"PRIuMAX" over limit %"PRIuMAX), |
02710228 SP |
1030 | (uintmax_t)length, (uintmax_t)limit); |
1031 | } | |
1032 | ||
1570856b JK |
1033 | void *xmmap_gently(void *start, size_t length, |
1034 | int prot, int flags, int fd, off_t offset) | |
58ecbd5e | 1035 | { |
02710228 SP |
1036 | void *ret; |
1037 | ||
1038 | mmap_limit_check(length); | |
1039 | ret = mmap(start, length, prot, flags, fd, offset); | |
9827d4c1 JK |
1040 | if (ret == MAP_FAILED && !length) |
1041 | ret = NULL; | |
58ecbd5e JN |
1042 | return ret; |
1043 | } | |
1044 | ||
dc059294 EW |
1045 | const char *mmap_os_err(void) |
1046 | { | |
1047 | static const char blank[] = ""; | |
1048 | #if defined(__linux__) | |
1049 | if (errno == ENOMEM) { | |
1050 | /* this continues an existing error message: */ | |
1051 | static const char enomem[] = | |
1052 | ", check sys.vm.max_map_count and/or RLIMIT_DATA"; | |
1053 | return enomem; | |
1054 | } | |
1055 | #endif /* OS-specific bits */ | |
1056 | return blank; | |
1057 | } | |
1058 | ||
1570856b JK |
1059 | void *xmmap(void *start, size_t length, |
1060 | int prot, int flags, int fd, off_t offset) | |
1061 | { | |
1062 | void *ret = xmmap_gently(start, length, prot, flags, fd, offset); | |
1063 | if (ret == MAP_FAILED) | |
dc059294 | 1064 | die_errno(_("mmap failed%s"), mmap_os_err()); |
1570856b JK |
1065 | return ret; |
1066 | } | |
1067 | ||
b04cdea4 ÆAB |
1068 | static int format_object_header_literally(char *str, size_t size, |
1069 | const char *type, size_t objsize) | |
1070 | { | |
1071 | return xsnprintf(str, size, "%s %"PRIuMAX, type, (uintmax_t)objsize) + 1; | |
1072 | } | |
1073 | ||
1074 | int format_object_header(char *str, size_t size, enum object_type type, | |
1075 | size_t objsize) | |
1076 | { | |
1077 | const char *name = type_name(type); | |
1078 | ||
1079 | if (!name) | |
1080 | BUG("could not get a type name for 'enum object_type' value %d", type); | |
1081 | ||
1082 | return format_object_header_literally(str, size, name, objsize); | |
1083 | } | |
1084 | ||
b98d1885 | 1085 | int check_object_signature(struct repository *r, const struct object_id *oid, |
44439c1c ÆAB |
1086 | void *buf, unsigned long size, |
1087 | enum object_type type) | |
88d0db55 | 1088 | { |
8d691757 EB |
1089 | const struct git_hash_algo *algo = |
1090 | oid->algo ? &hash_algos[oid->algo] : r->hash_algo; | |
0f156dbb ÆAB |
1091 | struct object_id real_oid; |
1092 | ||
8d691757 | 1093 | hash_object_file(algo, buf, size, type, &real_oid); |
0f156dbb ÆAB |
1094 | |
1095 | return !oideq(oid, &real_oid) ? -1 : 0; | |
1096 | } | |
1097 | ||
1098 | int stream_object_signature(struct repository *r, const struct object_id *oid) | |
1099 | { | |
1100 | struct object_id real_oid; | |
1101 | unsigned long size; | |
090ea126 NTND |
1102 | enum object_type obj_type; |
1103 | struct git_istream *st; | |
18e2588e | 1104 | git_hash_ctx c; |
1af64f73 | 1105 | char hdr[MAX_HEADER_LEN]; |
090ea126 | 1106 | int hdrlen; |
88d0db55 | 1107 | |
b98d1885 | 1108 | st = open_istream(r, oid, &obj_type, &size, NULL); |
090ea126 NTND |
1109 | if (!st) |
1110 | return -1; | |
88d0db55 | 1111 | |
090ea126 | 1112 | /* Generate the header */ |
b04cdea4 | 1113 | hdrlen = format_object_header(hdr, sizeof(hdr), obj_type, size); |
88d0db55 | 1114 | |
090ea126 | 1115 | /* Sha1.. */ |
b98d1885 MT |
1116 | r->hash_algo->init_fn(&c); |
1117 | r->hash_algo->update_fn(&c, hdr, hdrlen); | |
090ea126 NTND |
1118 | for (;;) { |
1119 | char buf[1024 * 16]; | |
1120 | ssize_t readlen = read_istream(st, buf, sizeof(buf)); | |
1f688557 | 1121 | |
f54fac53 JK |
1122 | if (readlen < 0) { |
1123 | close_istream(st); | |
1124 | return -1; | |
1125 | } | |
090ea126 NTND |
1126 | if (!readlen) |
1127 | break; | |
b98d1885 | 1128 | r->hash_algo->update_fn(&c, buf, readlen); |
fa5fc15d | 1129 | } |
0f156dbb | 1130 | r->hash_algo->final_oid_fn(&real_oid, &c); |
090ea126 | 1131 | close_istream(st); |
0f156dbb | 1132 | return !oideq(oid, &real_oid) ? -1 : 0; |
fa5fc15d SP |
1133 | } |
1134 | ||
1b8ac5ea | 1135 | int git_open_cloexec(const char *name, int flags) |
a0788266 | 1136 | { |
1e3001a8 JH |
1137 | int fd; |
1138 | static int o_cloexec = O_CLOEXEC; | |
a0788266 | 1139 | |
1e3001a8 JH |
1140 | fd = open(name, flags | o_cloexec); |
1141 | if ((o_cloexec & O_CLOEXEC) && fd < 0 && errno == EINVAL) { | |
cd66ada0 | 1142 | /* Try again w/o O_CLOEXEC: the kernel might not support it */ |
1e3001a8 JH |
1143 | o_cloexec &= ~O_CLOEXEC; |
1144 | fd = open(name, flags | o_cloexec); | |
491a8dec | 1145 | } |
491a8dec | 1146 | |
9fb9495d | 1147 | #if defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC) |
491a8dec | 1148 | { |
1e3001a8 | 1149 | static int fd_cloexec = FD_CLOEXEC; |
a0788266 | 1150 | |
1e3001a8 JH |
1151 | if (!o_cloexec && 0 <= fd && fd_cloexec) { |
1152 | /* Opened w/o O_CLOEXEC? try with fcntl(2) to add it */ | |
9fb9495d EW |
1153 | int flags = fcntl(fd, F_GETFD); |
1154 | if (fcntl(fd, F_SETFD, flags | fd_cloexec)) | |
1e3001a8 | 1155 | fd_cloexec = 0; |
cd66ada0 | 1156 | } |
44d1c19e | 1157 | } |
a0788266 | 1158 | #endif |
1b8ac5ea | 1159 | return fd; |
a0788266 JS |
1160 | } |
1161 | ||
3cf8b462 | 1162 | /* |
514c5fdd | 1163 | * Find "oid" as a loose object in the local repository or in an alternate. |
771e7d57 JK |
1164 | * Returns 0 on success, negative on failure. |
1165 | * | |
1166 | * The "path" out-parameter will give the path of the object we found (if any). | |
1167 | * Note that it may point to static storage and is only valid until another | |
514c5fdd | 1168 | * call to stat_loose_object(). |
3cf8b462 | 1169 | */ |
514c5fdd JK |
1170 | static int stat_loose_object(struct repository *r, const struct object_id *oid, |
1171 | struct stat *st, const char **path) | |
1f688557 | 1172 | { |
263db403 | 1173 | struct object_directory *odb; |
ea657730 CC |
1174 | static struct strbuf buf = STRBUF_INIT; |
1175 | ||
d2607fa0 | 1176 | prepare_alt_odb(r); |
f0eaf638 | 1177 | for (odb = r->objects->odb; odb; odb = odb->next) { |
514c5fdd | 1178 | *path = odb_loose_path(odb, &buf, oid); |
771e7d57 | 1179 | if (!lstat(*path, st)) |
052fe5ea | 1180 | return 0; |
c7934306 SP |
1181 | } |
1182 | ||
3cf8b462 SP |
1183 | return -1; |
1184 | } | |
1185 | ||
771e7d57 | 1186 | /* |
514c5fdd | 1187 | * Like stat_loose_object(), but actually open the object and return the |
771e7d57 JK |
1188 | * descriptor. See the caveats on the "path" parameter above. |
1189 | */ | |
514c5fdd JK |
1190 | static int open_loose_object(struct repository *r, |
1191 | const struct object_id *oid, const char **path) | |
60bb8b14 | 1192 | { |
44d1c19e | 1193 | int fd; |
263db403 | 1194 | struct object_directory *odb; |
f0eaf638 | 1195 | int most_interesting_errno = ENOENT; |
ea657730 CC |
1196 | static struct strbuf buf = STRBUF_INIT; |
1197 | ||
ec7283e5 | 1198 | prepare_alt_odb(r); |
f0eaf638 | 1199 | for (odb = r->objects->odb; odb; odb = odb->next) { |
514c5fdd | 1200 | *path = odb_loose_path(odb, &buf, oid); |
771e7d57 | 1201 | fd = git_open(*path); |
44d1c19e LT |
1202 | if (fd >= 0) |
1203 | return fd; | |
f0eaf638 | 1204 | |
d6c8a05b JK |
1205 | if (most_interesting_errno == ENOENT) |
1206 | most_interesting_errno = errno; | |
03e79c88 | 1207 | } |
d6c8a05b | 1208 | errno = most_interesting_errno; |
44d1c19e | 1209 | return -1; |
1f688557 JH |
1210 | } |
1211 | ||
61c7711c | 1212 | static int quick_has_loose(struct repository *r, |
d7a24573 | 1213 | const struct object_id *oid) |
61c7711c | 1214 | { |
61c7711c JK |
1215 | struct object_directory *odb; |
1216 | ||
61c7711c JK |
1217 | prepare_alt_odb(r); |
1218 | for (odb = r->objects->odb; odb; odb = odb->next) { | |
92d8ed8a | 1219 | if (oidtree_contains(odb_loose_cache(odb, oid), oid)) |
61c7711c JK |
1220 | return 1; |
1221 | } | |
1222 | return 0; | |
1223 | } | |
1224 | ||
f6371f92 | 1225 | /* |
ae285ac4 JT |
1226 | * Map and close the given loose object fd. The path argument is used for |
1227 | * error reporting. | |
f6371f92 | 1228 | */ |
ae285ac4 | 1229 | static void *map_fd(int fd, const char *path, unsigned long *size) |
27d69a46 | 1230 | { |
ae285ac4 JT |
1231 | void *map = NULL; |
1232 | struct stat st; | |
1f688557 | 1233 | |
ae285ac4 JT |
1234 | if (!fstat(fd, &st)) { |
1235 | *size = xsize_t(st.st_size); | |
1236 | if (!*size) { | |
1237 | /* mmap() is forbidden on empty files */ | |
1238 | error(_("object file %s is empty"), path); | |
1239 | close(fd); | |
1240 | return NULL; | |
144bde78 | 1241 | } |
ae285ac4 | 1242 | map = xmmap(NULL, *size, PROT_READ, MAP_PRIVATE, fd, 0); |
74e34e1f | 1243 | } |
ae285ac4 | 1244 | close(fd); |
0fcfd160 | 1245 | return map; |
74e34e1f NP |
1246 | } |
1247 | ||
514c5fdd JK |
1248 | void *map_loose_object(struct repository *r, |
1249 | const struct object_id *oid, | |
1250 | unsigned long *size) | |
068f85e3 | 1251 | { |
ae285ac4 JT |
1252 | const char *p; |
1253 | int fd = open_loose_object(r, oid, &p); | |
1254 | ||
1255 | if (fd < 0) | |
1256 | return NULL; | |
1257 | return map_fd(fd, p, size); | |
068f85e3 | 1258 | } |
1259 | ||
3b6a8db3 ÆAB |
1260 | enum unpack_loose_header_result unpack_loose_header(git_zstream *stream, |
1261 | unsigned char *map, | |
1262 | unsigned long mapsize, | |
1263 | void *buffer, | |
1264 | unsigned long bufsiz, | |
1265 | struct strbuf *header) | |
47fe3f6e | 1266 | { |
01cab976 | 1267 | int status; |
31877c9a | 1268 | |
c4483576 LT |
1269 | /* Get the data stream */ |
1270 | memset(stream, 0, sizeof(*stream)); | |
1271 | stream->next_in = map; | |
1272 | stream->avail_in = mapsize; | |
1273 | stream->next_out = buffer; | |
93821bd9 | 1274 | stream->avail_out = bufsiz; |
47fe3f6e | 1275 | |
39c68542 | 1276 | git_inflate_init(stream); |
31877c9a | 1277 | obj_read_unlock(); |
01cab976 | 1278 | status = git_inflate(stream, 0); |
31877c9a | 1279 | obj_read_lock(); |
d21f8426 | 1280 | if (status < Z_OK) |
3b6a8db3 | 1281 | return ULHR_BAD; |
d131b7af | 1282 | |
46f03448 KN |
1283 | /* |
1284 | * Check if entire header is unpacked in the first iteration. | |
d131b7af | 1285 | */ |
46f03448 | 1286 | if (memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer)) |
3b6a8db3 | 1287 | return ULHR_OK; |
d131b7af | 1288 | |
01cab976 ÆAB |
1289 | /* |
1290 | * We have a header longer than MAX_HEADER_LEN. The "header" | |
1291 | * here is only non-NULL when we run "cat-file | |
1292 | * --allow-unknown-type". | |
1293 | */ | |
1294 | if (!header) | |
5848fb11 | 1295 | return ULHR_TOO_LONG; |
d131b7af | 1296 | |
46f03448 KN |
1297 | /* |
1298 | * buffer[0..bufsiz] was not large enough. Copy the partial | |
1299 | * result out to header, and then append the result of further | |
1300 | * reading the stream. | |
1301 | */ | |
1302 | strbuf_add(header, buffer, stream->next_out - (unsigned char *)buffer); | |
1303 | stream->next_out = buffer; | |
1304 | stream->avail_out = bufsiz; | |
d131b7af | 1305 | |
46f03448 | 1306 | do { |
31877c9a | 1307 | obj_read_unlock(); |
46f03448 | 1308 | status = git_inflate(stream, 0); |
31877c9a | 1309 | obj_read_lock(); |
46f03448 KN |
1310 | strbuf_add(header, buffer, stream->next_out - (unsigned char *)buffer); |
1311 | if (memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer)) | |
1312 | return 0; | |
1313 | stream->next_out = buffer; | |
1314 | stream->avail_out = bufsiz; | |
1315 | } while (status != Z_STREAM_END); | |
5848fb11 | 1316 | return ULHR_TOO_LONG; |
d131b7af SP |
1317 | } |
1318 | ||
00a7760e JK |
1319 | static void *unpack_loose_rest(git_zstream *stream, |
1320 | void *buffer, unsigned long size, | |
1321 | const struct object_id *oid) | |
95099731 | 1322 | { |
5180cacc | 1323 | int bytes = strlen(buffer) + 1; |
3aee68aa | 1324 | unsigned char *buf = xmallocz(size); |
93821bd9 | 1325 | unsigned long n; |
7efbff75 | 1326 | int status = Z_OK; |
95099731 | 1327 | |
93821bd9 LT |
1328 | n = stream->total_out - bytes; |
1329 | if (n > size) | |
1330 | n = size; | |
1331 | memcpy(buf, (char *) buffer + bytes, n); | |
1332 | bytes = n; | |
456cdf6e LT |
1333 | if (bytes <= size) { |
1334 | /* | |
1335 | * The above condition must be (bytes <= size), not | |
1336 | * (bytes < size). In other words, even though we | |
ccf5ace0 | 1337 | * expect no more output and set avail_out to zero, |
456cdf6e LT |
1338 | * the input zlib stream may have bytes that express |
1339 | * "this concludes the stream", and we *do* want to | |
1340 | * eat that input. | |
1341 | * | |
1342 | * Otherwise we would not be able to test that we | |
1343 | * consumed all the input to reach the expected size; | |
1344 | * we also want to check that zlib tells us that all | |
1345 | * went well with status == Z_STREAM_END at the end. | |
1346 | */ | |
5180cacc LT |
1347 | stream->next_out = buf + bytes; |
1348 | stream->avail_out = size - bytes; | |
31877c9a MT |
1349 | while (status == Z_OK) { |
1350 | obj_read_unlock(); | |
39c68542 | 1351 | status = git_inflate(stream, Z_FINISH); |
31877c9a MT |
1352 | obj_read_lock(); |
1353 | } | |
5180cacc | 1354 | } |
456cdf6e | 1355 | if (status == Z_STREAM_END && !stream->avail_in) { |
39c68542 | 1356 | git_inflate_end(stream); |
7efbff75 | 1357 | return buf; |
95099731 NTND |
1358 | } |
1359 | ||
7efbff75 | 1360 | if (status < 0) |
00a7760e | 1361 | error(_("corrupt loose object '%s'"), oid_to_hex(oid)); |
7efbff75 | 1362 | else if (stream->avail_in) |
259328b7 | 1363 | error(_("garbage at end of loose object '%s'"), |
00a7760e | 1364 | oid_to_hex(oid)); |
7efbff75 JH |
1365 | free(buf); |
1366 | return NULL; | |
95099731 NTND |
1367 | } |
1368 | ||
d40d535b | 1369 | /* |
5180cacc LT |
1370 | * We used to just use "sscanf()", but that's actually way |
1371 | * too permissive for what we want to check. So do an anal | |
1372 | * object header parse by hand. | |
d40d535b | 1373 | */ |
dccb32bf | 1374 | int parse_loose_header(const char *hdr, struct object_info *oi) |
1f688557 | 1375 | { |
46f03448 | 1376 | const char *type_buf = hdr; |
d6a09e79 | 1377 | size_t size; |
46f03448 | 1378 | int type, type_len = 0; |
43057304 | 1379 | |
5180cacc | 1380 | /* |
46f03448 | 1381 | * The type can be of any size but is followed by |
21666f1a | 1382 | * a space. |
5180cacc | 1383 | */ |
5180cacc LT |
1384 | for (;;) { |
1385 | char c = *hdr++; | |
d21f8426 JH |
1386 | if (!c) |
1387 | return -1; | |
5180cacc LT |
1388 | if (c == ' ') |
1389 | break; | |
46f03448 | 1390 | type_len++; |
5180cacc | 1391 | } |
1f688557 | 1392 | |
46f03448 | 1393 | type = type_from_string_gently(type_buf, type_len, 1); |
6ca32f47 BW |
1394 | if (oi->type_name) |
1395 | strbuf_add(oi->type_name, type_buf, type_len); | |
46f03448 KN |
1396 | if (oi->typep) |
1397 | *oi->typep = type; | |
5180cacc LT |
1398 | |
1399 | /* | |
1400 | * The length must follow immediately, and be in canonical | |
1401 | * decimal format (ie "010" is not valid). | |
1402 | */ | |
1403 | size = *hdr++ - '0'; | |
1404 | if (size > 9) | |
1405 | return -1; | |
1406 | if (size) { | |
1407 | for (;;) { | |
1408 | unsigned long c = *hdr - '0'; | |
1409 | if (c > 9) | |
1410 | break; | |
1411 | hdr++; | |
d6a09e79 | 1412 | size = st_add(st_mult(size, 10), c); |
1b1005d1 | 1413 | } |
c01f51cc | 1414 | } |
46f03448 KN |
1415 | |
1416 | if (oi->sizep) | |
d6a09e79 | 1417 | *oi->sizep = cast_size_t_to_ulong(size); |
5180cacc LT |
1418 | |
1419 | /* | |
1420 | * The length must be followed by a zero byte | |
1421 | */ | |
dccb32bf ÆAB |
1422 | if (*hdr) |
1423 | return -1; | |
21666f1a | 1424 | |
dccb32bf ÆAB |
1425 | /* |
1426 | * The format is valid, but the type may still be bogus. The | |
1427 | * Caller needs to check its oi->typep. | |
1428 | */ | |
1429 | return 0; | |
bf592c50 DB |
1430 | } |
1431 | ||
514c5fdd JK |
1432 | static int loose_object_info(struct repository *r, |
1433 | const struct object_id *oid, | |
1434 | struct object_info *oi, int flags) | |
65c2e0c3 | 1435 | { |
46f03448 | 1436 | int status = 0; |
9e59b38c | 1437 | int fd; |
46f03448 | 1438 | unsigned long mapsize; |
9e59b38c | 1439 | const char *path; |
65c2e0c3 | 1440 | void *map; |
ef49a7a0 | 1441 | git_zstream stream; |
1af64f73 | 1442 | char hdr[MAX_HEADER_LEN]; |
46f03448 | 1443 | struct strbuf hdrbuf = STRBUF_INIT; |
c84a1f3e | 1444 | unsigned long size_scratch; |
dccb32bf | 1445 | enum object_type type_scratch; |
01cab976 | 1446 | int allow_unknown = flags & OBJECT_INFO_ALLOW_UNKNOWN_TYPE; |
65c2e0c3 | 1447 | |
b99b6bcc JK |
1448 | if (oi->delta_base_oid) |
1449 | oidclr(oi->delta_base_oid); | |
5d642e75 | 1450 | |
052fe5ea JK |
1451 | /* |
1452 | * If we don't care about type or size, then we don't | |
4ef8d1dd JH |
1453 | * need to look inside the object at all. Note that we |
1454 | * do not optimize out the stat call, even if the | |
1455 | * caller doesn't care about the disk-size, since our | |
1456 | * return value implicitly indicates whether the | |
1457 | * object even exists. | |
052fe5ea | 1458 | */ |
6ca32f47 | 1459 | if (!oi->typep && !oi->type_name && !oi->sizep && !oi->contentp) { |
4ef8d1dd | 1460 | struct stat st; |
61c7711c | 1461 | if (!oi->disk_sizep && (flags & OBJECT_INFO_QUICK)) |
d7a24573 | 1462 | return quick_has_loose(r, oid) ? 0 : -1; |
514c5fdd | 1463 | if (stat_loose_object(r, oid, &st, &path) < 0) |
4ef8d1dd JH |
1464 | return -1; |
1465 | if (oi->disk_sizep) | |
23c339c0 | 1466 | *oi->disk_sizep = st.st_size; |
052fe5ea JK |
1467 | return 0; |
1468 | } | |
1469 | ||
9e59b38c JT |
1470 | fd = open_loose_object(r, oid, &path); |
1471 | if (fd < 0) { | |
1472 | if (errno != ENOENT) | |
1473 | error_errno(_("unable to open loose object %s"), oid_to_hex(oid)); | |
1474 | return -1; | |
1475 | } | |
1476 | map = map_fd(fd, path, &mapsize); | |
f0df4ed5 | 1477 | if (!map) |
dbea72a8 | 1478 | return -1; |
c84a1f3e JT |
1479 | |
1480 | if (!oi->sizep) | |
1481 | oi->sizep = &size_scratch; | |
dccb32bf ÆAB |
1482 | if (!oi->typep) |
1483 | oi->typep = &type_scratch; | |
c84a1f3e | 1484 | |
23c339c0 JK |
1485 | if (oi->disk_sizep) |
1486 | *oi->disk_sizep = mapsize; | |
01cab976 | 1487 | |
3b6a8db3 ÆAB |
1488 | switch (unpack_loose_header(&stream, map, mapsize, hdr, sizeof(hdr), |
1489 | allow_unknown ? &hdrbuf : NULL)) { | |
1490 | case ULHR_OK: | |
dccb32bf ÆAB |
1491 | if (parse_loose_header(hdrbuf.len ? hdrbuf.buf : hdr, oi) < 0) |
1492 | status = error(_("unable to parse %s header"), oid_to_hex(oid)); | |
1493 | else if (!allow_unknown && *oi->typep < 0) | |
1494 | die(_("invalid object type")); | |
1495 | ||
1496 | if (!oi->contentp) | |
1497 | break; | |
1498 | *oi->contentp = unpack_loose_rest(&stream, hdr, *oi->sizep, oid); | |
1499 | if (*oi->contentp) | |
1500 | goto cleanup; | |
1501 | ||
1502 | status = -1; | |
3b6a8db3 ÆAB |
1503 | break; |
1504 | case ULHR_BAD: | |
259328b7 | 1505 | status = error(_("unable to unpack %s header"), |
514c5fdd | 1506 | oid_to_hex(oid)); |
3b6a8db3 | 1507 | break; |
5848fb11 ÆAB |
1508 | case ULHR_TOO_LONG: |
1509 | status = error(_("header for %s too long, exceeds %d bytes"), | |
1510 | oid_to_hex(oid), MAX_HEADER_LEN); | |
1511 | break; | |
3b6a8db3 | 1512 | } |
c84a1f3e | 1513 | |
9e59b38c JT |
1514 | if (status && (flags & OBJECT_INFO_DIE_IF_CORRUPT)) |
1515 | die(_("loose object %s (stored in %s) is corrupt"), | |
1516 | oid_to_hex(oid), path); | |
1517 | ||
dccb32bf ÆAB |
1518 | git_inflate_end(&stream); |
1519 | cleanup: | |
65c2e0c3 | 1520 | munmap(map, mapsize); |
c84a1f3e JT |
1521 | if (oi->sizep == &size_scratch) |
1522 | oi->sizep = NULL; | |
46f03448 | 1523 | strbuf_release(&hdrbuf); |
dccb32bf ÆAB |
1524 | if (oi->typep == &type_scratch) |
1525 | oi->typep = NULL; | |
3ab0fb06 | 1526 | oi->whence = OI_LOOSE; |
dccb32bf | 1527 | return status; |
65c2e0c3 JH |
1528 | } |
1529 | ||
31877c9a MT |
1530 | int obj_read_use_lock = 0; |
1531 | pthread_mutex_t obj_read_mutex; | |
1532 | ||
1533 | void enable_obj_read_lock(void) | |
1534 | { | |
1535 | if (obj_read_use_lock) | |
1536 | return; | |
1537 | ||
1538 | obj_read_use_lock = 1; | |
1539 | init_recursive_mutex(&obj_read_mutex); | |
1540 | } | |
1541 | ||
1542 | void disable_obj_read_lock(void) | |
1543 | { | |
1544 | if (!obj_read_use_lock) | |
1545 | return; | |
1546 | ||
1547 | obj_read_use_lock = 0; | |
1548 | pthread_mutex_destroy(&obj_read_mutex); | |
1549 | } | |
1550 | ||
8b4c0103 JT |
1551 | int fetch_if_missing = 1; |
1552 | ||
31877c9a MT |
1553 | static int do_oid_object_info_extended(struct repository *r, |
1554 | const struct object_id *oid, | |
1555 | struct object_info *oi, unsigned flags) | |
f0df4ed5 | 1556 | { |
cd585e2a | 1557 | static struct object_info blank_oi = OBJECT_INFO_INIT; |
9c8a294a | 1558 | struct cached_object *co; |
f0df4ed5 | 1559 | struct pack_entry e; |
5b086407 | 1560 | int rtype; |
b383a13c | 1561 | const struct object_id *real = oid; |
8b4c0103 | 1562 | int already_retried = 0; |
f0df4ed5 | 1563 | |
31877c9a | 1564 | |
b383a13c | 1565 | if (flags & OBJECT_INFO_LOOKUP_REPLACE) |
9d98354f | 1566 | real = lookup_replace_object(r, oid); |
f0df4ed5 | 1567 | |
b383a13c | 1568 | if (is_null_oid(real)) |
87b5e236 JK |
1569 | return -1; |
1570 | ||
cd585e2a JT |
1571 | if (!oi) |
1572 | oi = &blank_oi; | |
1573 | ||
9c8a294a JT |
1574 | co = find_cached_object(real); |
1575 | if (co) { | |
1576 | if (oi->typep) | |
1577 | *(oi->typep) = co->type; | |
1578 | if (oi->sizep) | |
1579 | *(oi->sizep) = co->size; | |
1580 | if (oi->disk_sizep) | |
1581 | *(oi->disk_sizep) = 0; | |
b99b6bcc JK |
1582 | if (oi->delta_base_oid) |
1583 | oidclr(oi->delta_base_oid); | |
9c8a294a JT |
1584 | if (oi->type_name) |
1585 | strbuf_addstr(oi->type_name, type_name(co->type)); | |
1586 | if (oi->contentp) | |
1587 | *oi->contentp = xmemdupz(co->buf, co->size); | |
1588 | oi->whence = OI_CACHED; | |
1589 | return 0; | |
c4d9986f NTND |
1590 | } |
1591 | ||
8b4c0103 | 1592 | while (1) { |
42c8ce1c | 1593 | if (find_pack_entry(r, real, &e)) |
8b4c0103 JT |
1594 | break; |
1595 | ||
ddd63e64 | 1596 | /* Most likely it's a loose object. */ |
514c5fdd | 1597 | if (!loose_object_info(r, real, oi, flags)) |
5b086407 | 1598 | return 0; |
ddd63e64 SG |
1599 | |
1600 | /* Not a loose object; someone else may have just packed it. */ | |
2b7750c9 | 1601 | if (!(flags & OBJECT_INFO_QUICK)) { |
9d98354f | 1602 | reprepare_packed_git(r); |
42c8ce1c | 1603 | if (find_pack_entry(r, real, &e)) |
2b7750c9 JT |
1604 | break; |
1605 | } | |
8b4c0103 | 1606 | |
eef71904 JT |
1607 | /* |
1608 | * If r is the_repository, this might be an attempt at | |
1609 | * accessing a submodule object as if it were in the_repository | |
1610 | * (having called add_submodule_odb() on that submodule's ODB). | |
1611 | * If any such ODBs exist, register them and try again. | |
1612 | */ | |
1613 | if (r == the_repository && | |
1614 | register_all_submodule_odb_as_alternates()) | |
a35e03de JT |
1615 | /* We added some alternates; retry */ |
1616 | continue; | |
1617 | ||
8b4c0103 | 1618 | /* Check if it is a missing object */ |
ef830cc4 JT |
1619 | if (fetch_if_missing && repo_has_promisor_remote(r) && |
1620 | !already_retried && | |
31f5256c | 1621 | !(flags & OBJECT_INFO_SKIP_FETCH_OBJECT)) { |
b14ed5ad | 1622 | promisor_remote_get_direct(r, real, 1); |
8b4c0103 JT |
1623 | already_retried = 1; |
1624 | continue; | |
dfdd4afc | 1625 | } |
8b4c0103 | 1626 | |
9e59b38c JT |
1627 | if (flags & OBJECT_INFO_DIE_IF_CORRUPT) { |
1628 | const struct packed_git *p; | |
1629 | if ((flags & OBJECT_INFO_LOOKUP_REPLACE) && !oideq(real, oid)) | |
1630 | die(_("replacement %s not found for %s"), | |
1631 | oid_to_hex(real), oid_to_hex(oid)); | |
1632 | if ((p = has_packed_and_bad(r, real))) | |
1633 | die(_("packed object %s (stored in %s) is corrupt"), | |
1634 | oid_to_hex(real), p->pack_name); | |
1635 | } | |
8b4c0103 | 1636 | return -1; |
f0df4ed5 | 1637 | } |
3d77d877 | 1638 | |
cd585e2a JT |
1639 | if (oi == &blank_oi) |
1640 | /* | |
1641 | * We know that the caller doesn't actually need the | |
1642 | * information below, so return early. | |
1643 | */ | |
1644 | return 0; | |
9d98354f | 1645 | rtype = packed_object_info(r, e.p, e.offset, oi); |
412916ee | 1646 | if (rtype < 0) { |
751530de | 1647 | mark_bad_packed_object(e.p, real); |
31877c9a | 1648 | return do_oid_object_info_extended(r, real, oi, 0); |
3ab0fb06 | 1649 | } else if (oi->whence == OI_PACKED) { |
9a490590 JH |
1650 | oi->u.packed.offset = e.offset; |
1651 | oi->u.packed.pack = e.p; | |
1652 | oi->u.packed.is_delta = (rtype == OBJ_REF_DELTA || | |
1653 | rtype == OBJ_OFS_DELTA); | |
3d77d877 NP |
1654 | } |
1655 | ||
5b086407 | 1656 | return 0; |
f0df4ed5 JS |
1657 | } |
1658 | ||
2328ebaa EB |
1659 | static int oid_object_info_convert(struct repository *r, |
1660 | const struct object_id *input_oid, | |
1661 | struct object_info *input_oi, unsigned flags) | |
1662 | { | |
1663 | const struct git_hash_algo *input_algo = &hash_algos[input_oid->algo]; | |
1664 | int do_die = flags & OBJECT_INFO_DIE_IF_CORRUPT; | |
1665 | struct strbuf type_name = STRBUF_INIT; | |
1666 | struct object_id oid, delta_base_oid; | |
1667 | struct object_info new_oi, *oi; | |
1668 | unsigned long size; | |
1669 | void *content; | |
1670 | int ret; | |
1671 | ||
1672 | if (repo_oid_to_algop(r, input_oid, the_hash_algo, &oid)) { | |
1673 | if (do_die) | |
1674 | die(_("missing mapping of %s to %s"), | |
1675 | oid_to_hex(input_oid), the_hash_algo->name); | |
1676 | return -1; | |
1677 | } | |
1678 | ||
1679 | /* Is new_oi needed? */ | |
1680 | oi = input_oi; | |
1681 | if (input_oi && (input_oi->delta_base_oid || input_oi->sizep || | |
1682 | input_oi->contentp)) { | |
1683 | new_oi = *input_oi; | |
1684 | /* Does delta_base_oid need to be converted? */ | |
1685 | if (input_oi->delta_base_oid) | |
1686 | new_oi.delta_base_oid = &delta_base_oid; | |
1687 | /* Will the attributes differ when converted? */ | |
1688 | if (input_oi->sizep || input_oi->contentp) { | |
1689 | new_oi.contentp = &content; | |
1690 | new_oi.sizep = &size; | |
1691 | new_oi.type_name = &type_name; | |
1692 | } | |
1693 | oi = &new_oi; | |
1694 | } | |
1695 | ||
1696 | ret = oid_object_info_extended(r, &oid, oi, flags); | |
1697 | if (ret) | |
1698 | return -1; | |
1699 | if (oi == input_oi) | |
1700 | return ret; | |
1701 | ||
1702 | if (new_oi.contentp) { | |
1703 | struct strbuf outbuf = STRBUF_INIT; | |
1704 | enum object_type type; | |
1705 | ||
1706 | type = type_from_string_gently(type_name.buf, type_name.len, | |
1707 | !do_die); | |
1708 | if (type == -1) | |
1709 | return -1; | |
1710 | if (type != OBJ_BLOB) { | |
1711 | ret = convert_object_file(&outbuf, | |
1712 | the_hash_algo, input_algo, | |
1713 | content, size, type, !do_die); | |
1714 | if (ret == -1) | |
1715 | return -1; | |
1716 | free(content); | |
1717 | size = outbuf.len; | |
1718 | content = strbuf_detach(&outbuf, NULL); | |
1719 | } | |
1720 | if (input_oi->sizep) | |
1721 | *input_oi->sizep = size; | |
1722 | if (input_oi->contentp) | |
1723 | *input_oi->contentp = content; | |
1724 | else | |
1725 | free(content); | |
1726 | if (input_oi->type_name) | |
1727 | *input_oi->type_name = type_name; | |
1728 | else | |
1729 | strbuf_release(&type_name); | |
1730 | } | |
1731 | if (new_oi.delta_base_oid == &delta_base_oid) { | |
1732 | if (repo_oid_to_algop(r, &delta_base_oid, input_algo, | |
1733 | input_oi->delta_base_oid)) { | |
1734 | if (do_die) | |
1735 | die(_("missing mapping of %s to %s"), | |
1736 | oid_to_hex(&delta_base_oid), | |
1737 | input_algo->name); | |
1738 | return -1; | |
1739 | } | |
1740 | } | |
1741 | input_oi->whence = new_oi.whence; | |
1742 | input_oi->u = new_oi.u; | |
1743 | return ret; | |
1744 | } | |
1745 | ||
31877c9a MT |
1746 | int oid_object_info_extended(struct repository *r, const struct object_id *oid, |
1747 | struct object_info *oi, unsigned flags) | |
1748 | { | |
1749 | int ret; | |
2328ebaa EB |
1750 | |
1751 | if (oid->algo && (hash_algo_by_ptr(r->hash_algo) != oid->algo)) | |
1752 | return oid_object_info_convert(r, oid, oi, flags); | |
1753 | ||
31877c9a MT |
1754 | obj_read_lock(); |
1755 | ret = do_oid_object_info_extended(r, oid, oi, flags); | |
1756 | obj_read_unlock(); | |
1757 | return ret; | |
1758 | } | |
1759 | ||
1760 | ||
3fc0dca9 | 1761 | /* returns enum object_type or negative */ |
9d98354f SB |
1762 | int oid_object_info(struct repository *r, |
1763 | const struct object_id *oid, | |
1764 | unsigned long *sizep) | |
9a490590 | 1765 | { |
5b086407 | 1766 | enum object_type type; |
27b5c1a0 | 1767 | struct object_info oi = OBJECT_INFO_INIT; |
9a490590 | 1768 | |
5b086407 | 1769 | oi.typep = &type; |
9a490590 | 1770 | oi.sizep = sizep; |
9d98354f SB |
1771 | if (oid_object_info_extended(r, oid, &oi, |
1772 | OBJECT_INFO_LOOKUP_REPLACE) < 0) | |
5b086407 JK |
1773 | return -1; |
1774 | return type; | |
9a490590 JH |
1775 | } |
1776 | ||
829e5c3b PO |
1777 | int pretend_object_file(void *buf, unsigned long len, enum object_type type, |
1778 | struct object_id *oid) | |
d66b37bb JH |
1779 | { |
1780 | struct cached_object *co; | |
1781 | ||
44439c1c | 1782 | hash_object_file(the_hash_algo, buf, len, type, oid); |
bc726bd0 | 1783 | if (repo_has_object_file_with_flags(the_repository, oid, OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT) || |
a64d2aae | 1784 | find_cached_object(oid)) |
d66b37bb | 1785 | return 0; |
c7353967 | 1786 | ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc); |
d66b37bb JH |
1787 | co = &cached_objects[cached_object_nr++]; |
1788 | co->size = len; | |
21666f1a | 1789 | co->type = type; |
efa13f7b JH |
1790 | co->buf = xmalloc(len); |
1791 | memcpy(co->buf, buf, len); | |
62ba93ea | 1792 | oidcpy(&co->oid, oid); |
d66b37bb JH |
1793 | return 0; |
1794 | } | |
1795 | ||
b6c4cecc JH |
1796 | /* |
1797 | * This function dies on corrupt objects; the callers who want to | |
b25562e6 JK |
1798 | * deal with them should arrange to call oid_object_info_extended() and give |
1799 | * error messages themselves. | |
b6c4cecc | 1800 | */ |
0ba05cf2 JK |
1801 | void *repo_read_object_file(struct repository *r, |
1802 | const struct object_id *oid, | |
1803 | enum object_type *type, | |
1804 | unsigned long *size) | |
ac939109 | 1805 | { |
b25562e6 | 1806 | struct object_info oi = OBJECT_INFO_INIT; |
7be13f5f | 1807 | unsigned flags = OBJECT_INFO_DIE_IF_CORRUPT | OBJECT_INFO_LOOKUP_REPLACE; |
3ba7a065 | 1808 | void *data; |
b6c4cecc | 1809 | |
b25562e6 JK |
1810 | oi.typep = type; |
1811 | oi.sizep = size; | |
1812 | oi.contentp = &data; | |
b25562e6 | 1813 | if (oid_object_info_extended(r, oid, &oi, flags)) |
15b63689 | 1814 | return NULL; |
68095570 | 1815 | |
b25562e6 | 1816 | return data; |
ac939109 NP |
1817 | } |
1818 | ||
d3b4705a NTND |
1819 | void *read_object_with_reference(struct repository *r, |
1820 | const struct object_id *oid, | |
6aea6bae | 1821 | enum object_type required_type, |
40469ee9 | 1822 | unsigned long *size, |
02f0547e | 1823 | struct object_id *actual_oid_return) |
f4913f91 | 1824 | { |
6aea6bae | 1825 | enum object_type type; |
f4913f91 JH |
1826 | void *buffer; |
1827 | unsigned long isize; | |
02f0547e | 1828 | struct object_id actual_oid; |
f4913f91 | 1829 | |
02f0547e | 1830 | oidcpy(&actual_oid, oid); |
40469ee9 JH |
1831 | while (1) { |
1832 | int ref_length = -1; | |
1833 | const char *ref_type = NULL; | |
f4913f91 | 1834 | |
d3b4705a | 1835 | buffer = repo_read_object_file(r, &actual_oid, &type, &isize); |
40469ee9 JH |
1836 | if (!buffer) |
1837 | return NULL; | |
21666f1a | 1838 | if (type == required_type) { |
40469ee9 | 1839 | *size = isize; |
02f0547e | 1840 | if (actual_oid_return) |
1841 | oidcpy(actual_oid_return, &actual_oid); | |
40469ee9 JH |
1842 | return buffer; |
1843 | } | |
1844 | /* Handle references */ | |
21666f1a | 1845 | else if (type == OBJ_COMMIT) |
40469ee9 | 1846 | ref_type = "tree "; |
21666f1a | 1847 | else if (type == OBJ_TAG) |
40469ee9 JH |
1848 | ref_type = "object "; |
1849 | else { | |
1850 | free(buffer); | |
1851 | return NULL; | |
1852 | } | |
1853 | ref_length = strlen(ref_type); | |
f4913f91 | 1854 | |
94b5e093 | 1855 | if (ref_length + the_hash_algo->hexsz > isize || |
50974ec9 | 1856 | memcmp(buffer, ref_type, ref_length) || |
02f0547e | 1857 | get_oid_hex((char *) buffer + ref_length, &actual_oid)) { |
40469ee9 JH |
1858 | free(buffer); |
1859 | return NULL; | |
1860 | } | |
1cf58e72 | 1861 | free(buffer); |
40469ee9 | 1862 | /* Now we have the ID of the referred-to object in |
02f0547e | 1863 | * actual_oid. Check again. */ |
f4913f91 | 1864 | } |
f4913f91 JH |
1865 | } |
1866 | ||
2bbb28a3 ÆAB |
1867 | static void hash_object_body(const struct git_hash_algo *algo, git_hash_ctx *c, |
1868 | const void *buf, unsigned long len, | |
1869 | struct object_id *oid, | |
1870 | char *hdr, int *hdrlen) | |
1871 | { | |
1872 | algo->init_fn(c); | |
1873 | algo->update_fn(c, hdr, *hdrlen); | |
1874 | algo->update_fn(c, buf, len); | |
1875 | algo->final_oid_fn(oid, c); | |
1876 | } | |
1877 | ||
7ad5c44d MT |
1878 | static void write_object_file_prepare(const struct git_hash_algo *algo, |
1879 | const void *buf, unsigned long len, | |
2bbb28a3 | 1880 | enum object_type type, struct object_id *oid, |
a09c985e | 1881 | char *hdr, int *hdrlen) |
d410c0f5 | 1882 | { |
18e2588e | 1883 | git_hash_ctx c; |
d410c0f5 JH |
1884 | |
1885 | /* Generate the header */ | |
2bbb28a3 | 1886 | *hdrlen = format_object_header(hdr, *hdrlen, type, len); |
d410c0f5 JH |
1887 | |
1888 | /* Sha1.. */ | |
2bbb28a3 ÆAB |
1889 | hash_object_body(algo, &c, buf, len, oid, hdr, hdrlen); |
1890 | } | |
1891 | ||
1892 | static void write_object_file_prepare_literally(const struct git_hash_algo *algo, | |
1893 | const void *buf, unsigned long len, | |
1894 | const char *type, struct object_id *oid, | |
1895 | char *hdr, int *hdrlen) | |
1896 | { | |
1897 | git_hash_ctx c; | |
1898 | ||
1899 | *hdrlen = format_object_header_literally(hdr, *hdrlen, type, len); | |
1900 | hash_object_body(algo, &c, buf, len, oid, hdr, hdrlen); | |
d410c0f5 JH |
1901 | } |
1902 | ||
230f1322 | 1903 | /* |
5a688fe4 | 1904 | * Move the just written object into its final resting place. |
230f1322 | 1905 | */ |
cb5add58 | 1906 | int finalize_object_file(const char *tmpfile, const char *filename) |
230f1322 | 1907 | { |
e32c0a9c | 1908 | int ret = 0; |
5a688fe4 | 1909 | |
348df166 | 1910 | if (object_creation_mode == OBJECT_CREATION_USES_RENAMES) |
be66a6c4 JS |
1911 | goto try_rename; |
1912 | else if (link(tmpfile, filename)) | |
e32c0a9c | 1913 | ret = errno; |
7ebb6fca LT |
1914 | |
1915 | /* | |
1916 | * Coda hack - coda doesn't like cross-directory links, | |
1917 | * so we fall back to a rename, which will mean that it | |
1918 | * won't be able to check collisions, but that's not a | |
1919 | * big deal. | |
1920 | * | |
1921 | * The same holds for FAT formatted media. | |
1922 | * | |
3be1f18e | 1923 | * When this succeeds, we just return. We have nothing |
7ebb6fca LT |
1924 | * left to unlink. |
1925 | */ | |
1926 | if (ret && ret != EEXIST) { | |
be66a6c4 | 1927 | try_rename: |
7ebb6fca | 1928 | if (!rename(tmpfile, filename)) |
3be1f18e | 1929 | goto out; |
9e48b389 | 1930 | ret = errno; |
230f1322 | 1931 | } |
691f1a28 | 1932 | unlink_or_warn(tmpfile); |
230f1322 LT |
1933 | if (ret) { |
1934 | if (ret != EEXIST) { | |
2c319886 | 1935 | return error_errno(_("unable to write file %s"), filename); |
230f1322 LT |
1936 | } |
1937 | /* FIXME!!! Collision check here ? */ | |
1938 | } | |
1939 | ||
3be1f18e | 1940 | out: |
5256b006 | 1941 | if (adjust_shared_perm(filename)) |
259328b7 | 1942 | return error(_("unable to set permission to '%s'"), filename); |
230f1322 LT |
1943 | return 0; |
1944 | } | |
1945 | ||
44439c1c ÆAB |
1946 | static void hash_object_file_literally(const struct git_hash_algo *algo, |
1947 | const void *buf, unsigned long len, | |
1948 | const char *type, struct object_id *oid) | |
abdc3fc8 | 1949 | { |
1af64f73 | 1950 | char hdr[MAX_HEADER_LEN]; |
ef1286d3 | 1951 | int hdrlen = sizeof(hdr); |
44439c1c | 1952 | |
2bbb28a3 | 1953 | write_object_file_prepare_literally(algo, buf, len, type, oid, hdr, &hdrlen); |
abdc3fc8 RS |
1954 | } |
1955 | ||
44439c1c ÆAB |
1956 | void hash_object_file(const struct git_hash_algo *algo, const void *buf, |
1957 | unsigned long len, enum object_type type, | |
1958 | struct object_id *oid) | |
1959 | { | |
1960 | hash_object_file_literally(algo, buf, len, type_name(type), oid); | |
abdc3fc8 RS |
1961 | } |
1962 | ||
e9039dd3 | 1963 | /* Finalize a file on disk, and close it. */ |
c4e707f8 | 1964 | static void close_loose_object(int fd, const char *filename) |
e9039dd3 | 1965 | { |
020406ea NS |
1966 | if (the_repository->objects->odb->will_destroy) |
1967 | goto out; | |
b3cecf49 | 1968 | |
c0f4752e | 1969 | if (batch_fsync_enabled(FSYNC_COMPONENT_LOOSE_OBJECT)) |
83937e95 | 1970 | fsync_loose_object_bulk_checkin(fd, filename); |
c0f4752e | 1971 | else if (fsync_object_files > 0) |
c4e707f8 | 1972 | fsync_or_die(fd, filename); |
020406ea NS |
1973 | else |
1974 | fsync_component_or_die(FSYNC_COMPONENT_LOOSE_OBJECT, fd, | |
c4e707f8 | 1975 | filename); |
020406ea NS |
1976 | |
1977 | out: | |
e9039dd3 | 1978 | if (close(fd) != 0) |
76011357 | 1979 | die_errno(_("error when closing loose object file")); |
e9039dd3 LT |
1980 | } |
1981 | ||
5723fe7e LT |
1982 | /* Size of directory component, including the ending '/' */ |
1983 | static inline int directory_size(const char *filename) | |
1984 | { | |
1985 | const char *s = strrchr(filename, '/'); | |
1986 | if (!s) | |
1987 | return 0; | |
1988 | return s - filename + 1; | |
1989 | } | |
1990 | ||
1991 | /* | |
1992 | * This creates a temporary file in the same directory as the final | |
1993 | * 'filename' | |
1994 | * | |
1995 | * We want to avoid cross-directory filename renames, because those | |
1996 | * can have problems on various filesystems (FAT, NFS, Coda). | |
1997 | */ | |
d4b3d11a | 1998 | static int create_tmpfile(struct strbuf *tmp, const char *filename) |
5723fe7e LT |
1999 | { |
2000 | int fd, dirlen = directory_size(filename); | |
2001 | ||
d4b3d11a JK |
2002 | strbuf_reset(tmp); |
2003 | strbuf_add(tmp, filename, dirlen); | |
2004 | strbuf_addstr(tmp, "tmp_obj_XXXXXX"); | |
2005 | fd = git_mkstemp_mode(tmp->buf, 0444); | |
cbacbf4e | 2006 | if (fd < 0 && dirlen && errno == ENOENT) { |
d4b3d11a JK |
2007 | /* |
2008 | * Make sure the directory exists; note that the contents | |
2009 | * of the buffer are undefined after mkstemp returns an | |
2010 | * error, so we have to rewrite the whole buffer from | |
2011 | * scratch. | |
2012 | */ | |
2013 | strbuf_reset(tmp); | |
2014 | strbuf_add(tmp, filename, dirlen - 1); | |
2015 | if (mkdir(tmp->buf, 0777) && errno != EEXIST) | |
b2476a60 | 2016 | return -1; |
d4b3d11a | 2017 | if (adjust_shared_perm(tmp->buf)) |
5723fe7e LT |
2018 | return -1; |
2019 | ||
2020 | /* Try again */ | |
d4b3d11a JK |
2021 | strbuf_addstr(tmp, "/tmp_obj_XXXXXX"); |
2022 | fd = git_mkstemp_mode(tmp->buf, 0444); | |
5723fe7e LT |
2023 | } |
2024 | return fd; | |
2025 | } | |
2026 | ||
97a9db6f HX |
2027 | /** |
2028 | * Common steps for loose object writers to start writing loose | |
2029 | * objects: | |
2030 | * | |
2031 | * - Create tmpfile for the loose object. | |
2032 | * - Setup zlib stream for compression. | |
2033 | * - Start to feed header to zlib stream. | |
2034 | * | |
2035 | * Returns a "fd", which should later be provided to | |
2036 | * end_loose_object_common(). | |
2037 | */ | |
2038 | static int start_loose_object_common(struct strbuf *tmp_file, | |
2039 | const char *filename, unsigned flags, | |
2040 | git_zstream *stream, | |
2041 | unsigned char *buf, size_t buflen, | |
63a6745a | 2042 | git_hash_ctx *c, git_hash_ctx *compat_c, |
97a9db6f HX |
2043 | char *hdr, int hdrlen) |
2044 | { | |
63a6745a EB |
2045 | struct repository *repo = the_repository; |
2046 | const struct git_hash_algo *algo = repo->hash_algo; | |
2047 | const struct git_hash_algo *compat = repo->compat_hash_algo; | |
97a9db6f HX |
2048 | int fd; |
2049 | ||
2050 | fd = create_tmpfile(tmp_file, filename); | |
2051 | if (fd < 0) { | |
2052 | if (flags & HASH_SILENT) | |
2053 | return -1; | |
2054 | else if (errno == EACCES) | |
2055 | return error(_("insufficient permission for adding " | |
2056 | "an object to repository database %s"), | |
2057 | get_object_directory()); | |
2058 | else | |
2059 | return error_errno( | |
2060 | _("unable to create temporary file")); | |
2061 | } | |
2062 | ||
2063 | /* Setup zlib stream for compression */ | |
2064 | git_deflate_init(stream, zlib_compression_level); | |
2065 | stream->next_out = buf; | |
2066 | stream->avail_out = buflen; | |
63a6745a EB |
2067 | algo->init_fn(c); |
2068 | if (compat && compat_c) | |
2069 | compat->init_fn(compat_c); | |
97a9db6f HX |
2070 | |
2071 | /* Start to feed header to zlib stream */ | |
2072 | stream->next_in = (unsigned char *)hdr; | |
2073 | stream->avail_in = hdrlen; | |
2074 | while (git_deflate(stream, 0) == Z_OK) | |
2075 | ; /* nothing */ | |
63a6745a EB |
2076 | algo->update_fn(c, hdr, hdrlen); |
2077 | if (compat && compat_c) | |
2078 | compat->update_fn(compat_c, hdr, hdrlen); | |
97a9db6f HX |
2079 | |
2080 | return fd; | |
2081 | } | |
2082 | ||
21e7d881 ÆAB |
2083 | /** |
2084 | * Common steps for the inner git_deflate() loop for writing loose | |
2085 | * objects. Returns what git_deflate() returns. | |
2086 | */ | |
63a6745a | 2087 | static int write_loose_object_common(git_hash_ctx *c, git_hash_ctx *compat_c, |
21e7d881 ÆAB |
2088 | git_zstream *stream, const int flush, |
2089 | unsigned char *in0, const int fd, | |
2090 | unsigned char *compressed, | |
2091 | const size_t compressed_len) | |
2092 | { | |
63a6745a EB |
2093 | struct repository *repo = the_repository; |
2094 | const struct git_hash_algo *algo = repo->hash_algo; | |
2095 | const struct git_hash_algo *compat = repo->compat_hash_algo; | |
21e7d881 ÆAB |
2096 | int ret; |
2097 | ||
2098 | ret = git_deflate(stream, flush ? Z_FINISH : 0); | |
63a6745a EB |
2099 | algo->update_fn(c, in0, stream->next_in - in0); |
2100 | if (compat && compat_c) | |
2101 | compat->update_fn(compat_c, in0, stream->next_in - in0); | |
d422d061 RS |
2102 | if (write_in_full(fd, compressed, stream->next_out - compressed) < 0) |
2103 | die_errno(_("unable to write loose object file")); | |
21e7d881 ÆAB |
2104 | stream->next_out = compressed; |
2105 | stream->avail_out = compressed_len; | |
2106 | ||
2107 | return ret; | |
2108 | } | |
2109 | ||
97a9db6f HX |
2110 | /** |
2111 | * Common steps for loose object writers to end writing loose objects: | |
2112 | * | |
2113 | * - End the compression of zlib stream. | |
2114 | * - Get the calculated oid to "oid". | |
2115 | */ | |
63a6745a EB |
2116 | static int end_loose_object_common(git_hash_ctx *c, git_hash_ctx *compat_c, |
2117 | git_zstream *stream, struct object_id *oid, | |
2118 | struct object_id *compat_oid) | |
97a9db6f | 2119 | { |
63a6745a EB |
2120 | struct repository *repo = the_repository; |
2121 | const struct git_hash_algo *algo = repo->hash_algo; | |
2122 | const struct git_hash_algo *compat = repo->compat_hash_algo; | |
97a9db6f HX |
2123 | int ret; |
2124 | ||
2125 | ret = git_deflate_end_gently(stream); | |
2126 | if (ret != Z_OK) | |
2127 | return ret; | |
63a6745a EB |
2128 | algo->final_oid_fn(oid, c); |
2129 | if (compat && compat_c) | |
2130 | compat->final_oid_fn(compat_oid, compat_c); | |
97a9db6f HX |
2131 | |
2132 | return Z_OK; | |
2133 | } | |
2134 | ||
3fc7281f PO |
2135 | static int write_loose_object(const struct object_id *oid, char *hdr, |
2136 | int hdrlen, const void *buf, unsigned long len, | |
4ef91a2d | 2137 | time_t mtime, unsigned flags) |
0fcfd160 | 2138 | { |
915308b1 | 2139 | int fd, ret; |
9892beba | 2140 | unsigned char compressed[4096]; |
ef49a7a0 | 2141 | git_zstream stream; |
18e2588e | 2142 | git_hash_ctx c; |
3fc7281f | 2143 | struct object_id parano_oid; |
d4b3d11a | 2144 | static struct strbuf tmp_file = STRBUF_INIT; |
ea657730 CC |
2145 | static struct strbuf filename = STRBUF_INIT; |
2146 | ||
c0f4752e NS |
2147 | if (batch_fsync_enabled(FSYNC_COMPONENT_LOOSE_OBJECT)) |
2148 | prepare_loose_object_bulk_checkin(); | |
2149 | ||
514c5fdd | 2150 | loose_object_path(the_repository, &filename, oid); |
a44c9a5e | 2151 | |
97a9db6f HX |
2152 | fd = start_loose_object_common(&tmp_file, filename.buf, flags, |
2153 | &stream, compressed, sizeof(compressed), | |
63a6745a | 2154 | &c, NULL, hdr, hdrlen); |
97a9db6f HX |
2155 | if (fd < 0) |
2156 | return -1; | |
a44c9a5e LT |
2157 | |
2158 | /* Then the data itself.. */ | |
c00e657d | 2159 | stream.next_in = (void *)buf; |
a44c9a5e | 2160 | stream.avail_in = len; |
9892beba | 2161 | do { |
748af44c | 2162 | unsigned char *in0 = stream.next_in; |
21e7d881 | 2163 | |
63a6745a | 2164 | ret = write_loose_object_common(&c, NULL, &stream, 1, in0, fd, |
21e7d881 | 2165 | compressed, sizeof(compressed)); |
9892beba NP |
2166 | } while (ret == Z_OK); |
2167 | ||
ac54c277 | 2168 | if (ret != Z_STREAM_END) |
259328b7 | 2169 | die(_("unable to deflate new object %s (%d)"), oid_to_hex(oid), |
3fc7281f | 2170 | ret); |
63a6745a | 2171 | ret = end_loose_object_common(&c, NULL, &stream, ¶no_oid, NULL); |
ac54c277 | 2172 | if (ret != Z_OK) |
259328b7 | 2173 | die(_("deflateEnd on object %s failed (%d)"), oid_to_hex(oid), |
3fc7281f | 2174 | ret); |
9001dc2a | 2175 | if (!oideq(oid, ¶no_oid)) |
259328b7 | 2176 | die(_("confused by unstable object source data for %s"), |
3fc7281f | 2177 | oid_to_hex(oid)); |
ac54c277 | 2178 | |
c4e707f8 | 2179 | close_loose_object(fd, tmp_file.buf); |
0fcfd160 | 2180 | |
bbac7311 NP |
2181 | if (mtime) { |
2182 | struct utimbuf utb; | |
2183 | utb.actime = mtime; | |
2184 | utb.modtime = mtime; | |
4ef91a2d ÆAB |
2185 | if (utime(tmp_file.buf, &utb) < 0 && |
2186 | !(flags & HASH_SILENT)) | |
259328b7 | 2187 | warning_errno(_("failed utime() on %s"), tmp_file.buf); |
bbac7311 NP |
2188 | } |
2189 | ||
ea657730 | 2190 | return finalize_object_file(tmp_file.buf, filename.buf); |
0fcfd160 | 2191 | } |
8237b185 | 2192 | |
6862ebbf | 2193 | static int freshen_loose_object(const struct object_id *oid) |
33d4221c | 2194 | { |
6862ebbf | 2195 | return check_and_freshen(oid, 1); |
33d4221c JK |
2196 | } |
2197 | ||
6862ebbf | 2198 | static int freshen_packed_object(const struct object_id *oid) |
33d4221c JK |
2199 | { |
2200 | struct pack_entry e; | |
544443cb | 2201 | if (!find_pack_entry(the_repository, oid, &e)) |
ee1c6c34 | 2202 | return 0; |
a6131642 TB |
2203 | if (e.p->is_cruft) |
2204 | return 0; | |
ee1c6c34 JK |
2205 | if (e.p->freshened) |
2206 | return 1; | |
2207 | if (!freshen_file(e.p->pack_name)) | |
2208 | return 0; | |
2209 | e.p->freshened = 1; | |
2210 | return 1; | |
33d4221c JK |
2211 | } |
2212 | ||
2b6070ac HX |
2213 | int stream_loose_object(struct input_stream *in_stream, size_t len, |
2214 | struct object_id *oid) | |
2215 | { | |
63a6745a EB |
2216 | const struct git_hash_algo *compat = the_repository->compat_hash_algo; |
2217 | struct object_id compat_oid; | |
2b6070ac HX |
2218 | int fd, ret, err = 0, flush = 0; |
2219 | unsigned char compressed[4096]; | |
2220 | git_zstream stream; | |
63a6745a | 2221 | git_hash_ctx c, compat_c; |
2b6070ac HX |
2222 | struct strbuf tmp_file = STRBUF_INIT; |
2223 | struct strbuf filename = STRBUF_INIT; | |
2224 | int dirlen; | |
2225 | char hdr[MAX_HEADER_LEN]; | |
2226 | int hdrlen; | |
2227 | ||
2228 | if (batch_fsync_enabled(FSYNC_COMPONENT_LOOSE_OBJECT)) | |
2229 | prepare_loose_object_bulk_checkin(); | |
2230 | ||
2231 | /* Since oid is not determined, save tmp file to odb path. */ | |
2232 | strbuf_addf(&filename, "%s/", get_object_directory()); | |
2233 | hdrlen = format_object_header(hdr, sizeof(hdr), OBJ_BLOB, len); | |
2234 | ||
2235 | /* | |
2236 | * Common steps for write_loose_object and stream_loose_object to | |
2237 | * start writing loose objects: | |
2238 | * | |
2239 | * - Create tmpfile for the loose object. | |
2240 | * - Setup zlib stream for compression. | |
2241 | * - Start to feed header to zlib stream. | |
2242 | */ | |
2243 | fd = start_loose_object_common(&tmp_file, filename.buf, 0, | |
2244 | &stream, compressed, sizeof(compressed), | |
63a6745a | 2245 | &c, &compat_c, hdr, hdrlen); |
2b6070ac HX |
2246 | if (fd < 0) { |
2247 | err = -1; | |
2248 | goto cleanup; | |
2249 | } | |
2250 | ||
2251 | /* Then the data itself.. */ | |
2252 | do { | |
2253 | unsigned char *in0 = stream.next_in; | |
2254 | ||
2255 | if (!stream.avail_in && !in_stream->is_finished) { | |
2256 | const void *in = in_stream->read(in_stream, &stream.avail_in); | |
2257 | stream.next_in = (void *)in; | |
2258 | in0 = (unsigned char *)in; | |
2259 | /* All data has been read. */ | |
2260 | if (in_stream->is_finished) | |
2261 | flush = 1; | |
2262 | } | |
63a6745a | 2263 | ret = write_loose_object_common(&c, &compat_c, &stream, flush, in0, fd, |
2b6070ac HX |
2264 | compressed, sizeof(compressed)); |
2265 | /* | |
2266 | * Unlike write_loose_object(), we do not have the entire | |
2267 | * buffer. If we get Z_BUF_ERROR due to too few input bytes, | |
2268 | * then we'll replenish them in the next input_stream->read() | |
2269 | * call when we loop. | |
2270 | */ | |
2271 | } while (ret == Z_OK || ret == Z_BUF_ERROR); | |
2272 | ||
2273 | if (stream.total_in != len + hdrlen) | |
2274 | die(_("write stream object %ld != %"PRIuMAX), stream.total_in, | |
2275 | (uintmax_t)len + hdrlen); | |
2276 | ||
2277 | /* | |
2278 | * Common steps for write_loose_object and stream_loose_object to | |
2279 | * end writing loose oject: | |
2280 | * | |
2281 | * - End the compression of zlib stream. | |
2282 | * - Get the calculated oid. | |
2283 | */ | |
2284 | if (ret != Z_STREAM_END) | |
2285 | die(_("unable to stream deflate new object (%d)"), ret); | |
63a6745a | 2286 | ret = end_loose_object_common(&c, &compat_c, &stream, oid, &compat_oid); |
2b6070ac HX |
2287 | if (ret != Z_OK) |
2288 | die(_("deflateEnd on stream object failed (%d)"), ret); | |
2289 | close_loose_object(fd, tmp_file.buf); | |
2290 | ||
2291 | if (freshen_packed_object(oid) || freshen_loose_object(oid)) { | |
2292 | unlink_or_warn(tmp_file.buf); | |
2293 | goto cleanup; | |
2294 | } | |
2295 | ||
2296 | loose_object_path(the_repository, &filename, oid); | |
2297 | ||
2298 | /* We finally know the object path, and create the missing dir. */ | |
2299 | dirlen = directory_size(filename.buf); | |
2300 | if (dirlen) { | |
2301 | struct strbuf dir = STRBUF_INIT; | |
2302 | strbuf_add(&dir, filename.buf, dirlen); | |
2303 | ||
2304 | if (mkdir_in_gitdir(dir.buf) && errno != EEXIST) { | |
2305 | err = error_errno(_("unable to create directory %s"), dir.buf); | |
2306 | strbuf_release(&dir); | |
2307 | goto cleanup; | |
2308 | } | |
2309 | strbuf_release(&dir); | |
2310 | } | |
2311 | ||
2312 | err = finalize_object_file(tmp_file.buf, filename.buf); | |
63a6745a EB |
2313 | if (!err && compat) |
2314 | err = repo_add_loose_object_map(the_repository, oid, &compat_oid); | |
2b6070ac HX |
2315 | cleanup: |
2316 | strbuf_release(&tmp_file); | |
2317 | strbuf_release(&filename); | |
2318 | return err; | |
2319 | } | |
2320 | ||
4ef91a2d | 2321 | int write_object_file_flags(const void *buf, unsigned long len, |
c80d226a | 2322 | enum object_type type, struct object_id *oid, |
c2538492 | 2323 | struct object_id *compat_oid_in, unsigned flags) |
bbac7311 | 2324 | { |
63a6745a EB |
2325 | struct repository *repo = the_repository; |
2326 | const struct git_hash_algo *algo = repo->hash_algo; | |
2327 | const struct git_hash_algo *compat = repo->compat_hash_algo; | |
2328 | struct object_id compat_oid; | |
1af64f73 | 2329 | char hdr[MAX_HEADER_LEN]; |
ef1286d3 | 2330 | int hdrlen = sizeof(hdr); |
bbac7311 | 2331 | |
63a6745a EB |
2332 | /* Generate compat_oid */ |
2333 | if (compat) { | |
c2538492 EB |
2334 | if (compat_oid_in) |
2335 | oidcpy(&compat_oid, compat_oid_in); | |
2336 | else if (type == OBJ_BLOB) | |
63a6745a EB |
2337 | hash_object_file(compat, buf, len, type, &compat_oid); |
2338 | else { | |
2339 | struct strbuf converted = STRBUF_INIT; | |
2340 | convert_object_file(&converted, algo, compat, | |
2341 | buf, len, type, 0); | |
2342 | hash_object_file(compat, converted.buf, converted.len, | |
2343 | type, &compat_oid); | |
2344 | strbuf_release(&converted); | |
2345 | } | |
2346 | } | |
2347 | ||
bbac7311 NP |
2348 | /* Normally if we have it in the pack then we do not bother writing |
2349 | * it out into .git/objects/??/?{38} file. | |
2350 | */ | |
63a6745a | 2351 | write_object_file_prepare(algo, buf, len, type, oid, hdr, &hdrlen); |
6862ebbf | 2352 | if (freshen_packed_object(oid) || freshen_loose_object(oid)) |
bbac7311 | 2353 | return 0; |
63a6745a EB |
2354 | if (write_loose_object(oid, hdr, hdrlen, buf, len, 0, flags)) |
2355 | return -1; | |
2356 | if (compat) | |
2357 | return repo_add_loose_object_map(repo, oid, &compat_oid); | |
2358 | return 0; | |
bbac7311 NP |
2359 | } |
2360 | ||
0ff7b4f9 ÆAB |
2361 | int write_object_file_literally(const void *buf, unsigned long len, |
2362 | const char *type, struct object_id *oid, | |
2363 | unsigned flags) | |
0c3db67c ES |
2364 | { |
2365 | char *header; | |
63a6745a EB |
2366 | struct repository *repo = the_repository; |
2367 | const struct git_hash_algo *algo = repo->hash_algo; | |
2368 | const struct git_hash_algo *compat = repo->compat_hash_algo; | |
2369 | struct object_id compat_oid; | |
0c3db67c | 2370 | int hdrlen, status = 0; |
63a6745a EB |
2371 | int compat_type = -1; |
2372 | ||
2373 | if (compat) { | |
2374 | compat_type = type_from_string_gently(type, -1, 1); | |
2375 | if (compat_type == OBJ_BLOB) | |
2376 | hash_object_file(compat, buf, len, compat_type, | |
2377 | &compat_oid); | |
2378 | else if (compat_type != -1) { | |
2379 | struct strbuf converted = STRBUF_INIT; | |
2380 | convert_object_file(&converted, algo, compat, | |
2381 | buf, len, compat_type, 0); | |
2382 | hash_object_file(compat, converted.buf, converted.len, | |
2383 | compat_type, &compat_oid); | |
2384 | strbuf_release(&converted); | |
2385 | } | |
2386 | } | |
0c3db67c ES |
2387 | |
2388 | /* type string, SP, %lu of the length plus NUL must fit this */ | |
1af64f73 | 2389 | hdrlen = strlen(type) + MAX_HEADER_LEN; |
ef1286d3 | 2390 | header = xmalloc(hdrlen); |
2bbb28a3 ÆAB |
2391 | write_object_file_prepare_literally(the_hash_algo, buf, len, type, |
2392 | oid, header, &hdrlen); | |
0c3db67c ES |
2393 | |
2394 | if (!(flags & HASH_WRITE_OBJECT)) | |
2395 | goto cleanup; | |
6862ebbf | 2396 | if (freshen_packed_object(oid) || freshen_loose_object(oid)) |
0c3db67c | 2397 | goto cleanup; |
4ef91a2d | 2398 | status = write_loose_object(oid, header, hdrlen, buf, len, 0, 0); |
63a6745a EB |
2399 | if (compat_type != -1) |
2400 | return repo_add_loose_object_map(repo, oid, &compat_oid); | |
0c3db67c ES |
2401 | |
2402 | cleanup: | |
2403 | free(header); | |
2404 | return status; | |
2405 | } | |
2406 | ||
4bdb70a4 | 2407 | int force_object_loose(const struct object_id *oid, time_t mtime) |
bbac7311 | 2408 | { |
63a6745a EB |
2409 | struct repository *repo = the_repository; |
2410 | const struct git_hash_algo *compat = repo->compat_hash_algo; | |
bbac7311 NP |
2411 | void *buf; |
2412 | unsigned long len; | |
b25562e6 | 2413 | struct object_info oi = OBJECT_INFO_INIT; |
63a6745a | 2414 | struct object_id compat_oid; |
bbac7311 | 2415 | enum object_type type; |
1af64f73 | 2416 | char hdr[MAX_HEADER_LEN]; |
bbac7311 | 2417 | int hdrlen; |
1fb23e65 | 2418 | int ret; |
bbac7311 | 2419 | |
6862ebbf | 2420 | if (has_loose_object(oid)) |
bbac7311 | 2421 | return 0; |
b25562e6 JK |
2422 | oi.typep = &type; |
2423 | oi.sizep = &len; | |
2424 | oi.contentp = &buf; | |
2425 | if (oid_object_info_extended(the_repository, oid, &oi, 0)) | |
2c319886 | 2426 | return error(_("cannot read object for %s"), oid_to_hex(oid)); |
63a6745a EB |
2427 | if (compat) { |
2428 | if (repo_oid_to_algop(repo, oid, compat, &compat_oid)) | |
2429 | return error(_("cannot map object %s to %s"), | |
2430 | oid_to_hex(oid), compat->name); | |
2431 | } | |
b04cdea4 | 2432 | hdrlen = format_object_header(hdr, sizeof(hdr), type, len); |
4ef91a2d | 2433 | ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime, 0); |
63a6745a EB |
2434 | if (!ret && compat) |
2435 | ret = repo_add_loose_object_map(the_repository, oid, &compat_oid); | |
1fb23e65 BS |
2436 | free(buf); |
2437 | ||
2438 | return ret; | |
bbac7311 NP |
2439 | } |
2440 | ||
1d8d9cb6 JT |
2441 | int has_object(struct repository *r, const struct object_id *oid, |
2442 | unsigned flags) | |
2443 | { | |
2444 | int quick = !(flags & HAS_OBJECT_RECHECK_PACKED); | |
2445 | unsigned object_info_flags = OBJECT_INFO_SKIP_FETCH_OBJECT | | |
2446 | (quick ? OBJECT_INFO_QUICK : 0); | |
2447 | ||
2448 | if (!startup_info->have_repository) | |
2449 | return 0; | |
2450 | return oid_object_info_extended(r, oid, NULL, object_info_flags) >= 0; | |
2451 | } | |
2452 | ||
cba595ab JH |
2453 | int repo_has_object_file_with_flags(struct repository *r, |
2454 | const struct object_id *oid, int flags) | |
8237b185 | 2455 | { |
3e8b7d3c JN |
2456 | if (!startup_info->have_repository) |
2457 | return 0; | |
9c8a294a | 2458 | return oid_object_info_extended(r, oid, NULL, flags) >= 0; |
b419aa25 | 2459 | } |
2460 | ||
9b45f499 SB |
2461 | int repo_has_object_file(struct repository *r, |
2462 | const struct object_id *oid) | |
b419aa25 | 2463 | { |
cba595ab | 2464 | return repo_has_object_file_with_flags(r, oid, 0); |
5827a035 JK |
2465 | } |
2466 | ||
69bbbe48 JK |
2467 | /* |
2468 | * We can't use the normal fsck_error_function() for index_mem(), | |
2469 | * because we don't yet have a valid oid for it to report. Instead, | |
2470 | * report the minimal fsck error here, and rely on the caller to | |
2471 | * give more context. | |
2472 | */ | |
0b4e9013 JK |
2473 | static int hash_format_check_report(struct fsck_options *opts UNUSED, |
2474 | const struct object_id *oid UNUSED, | |
2475 | enum object_type object_type UNUSED, | |
2476 | enum fsck_msg_type msg_type UNUSED, | |
2477 | enum fsck_msg_id msg_id UNUSED, | |
69bbbe48 JK |
2478 | const char *message) |
2479 | { | |
2480 | error(_("object fails fsck: %s"), message); | |
2481 | return 1; | |
c879daa2 NTND |
2482 | } |
2483 | ||
58bf2a4c NTND |
2484 | static int index_mem(struct index_state *istate, |
2485 | struct object_id *oid, void *buf, size_t size, | |
c4ce46fc JH |
2486 | enum object_type type, |
2487 | const char *path, unsigned flags) | |
e7332f96 | 2488 | { |
63e05f90 | 2489 | int ret = 0; |
bbea0dde | 2490 | int re_allocated = 0; |
c4ce46fc | 2491 | int write_object = flags & HASH_WRITE_OBJECT; |
74400e71 | 2492 | |
7672db20 | 2493 | if (!type) |
edaec3fb | 2494 | type = OBJ_BLOB; |
6c510bee LT |
2495 | |
2496 | /* | |
2497 | * Convert blobs to git internal format | |
2498 | */ | |
43df4f86 | 2499 | if ((type == OBJ_BLOB) && path) { |
f285a2d7 | 2500 | struct strbuf nbuf = STRBUF_INIT; |
58bf2a4c | 2501 | if (convert_to_git(istate, path, buf, size, &nbuf, |
8462ff43 | 2502 | get_conv_flags(flags))) { |
b315c5c0 | 2503 | buf = strbuf_detach(&nbuf, &size); |
6c510bee LT |
2504 | re_allocated = 1; |
2505 | } | |
2506 | } | |
c4ce46fc | 2507 | if (flags & HASH_FORMAT_CHECK) { |
69bbbe48 JK |
2508 | struct fsck_options opts = FSCK_OPTIONS_DEFAULT; |
2509 | ||
2510 | opts.strict = 1; | |
2511 | opts.error_func = hash_format_check_report; | |
2512 | if (fsck_buffer(null_oid(), type, buf, size, &opts)) | |
2513 | die(_("refusing to create malformed object")); | |
2514 | fsck_finish(&opts); | |
c879daa2 | 2515 | } |
6c510bee | 2516 | |
7672db20 | 2517 | if (write_object) |
c80d226a | 2518 | ret = write_object_file(buf, size, type, oid); |
abdc3fc8 | 2519 | else |
44439c1c | 2520 | hash_object_file(the_hash_algo, buf, size, type, oid); |
43df4f86 | 2521 | if (re_allocated) |
6c510bee | 2522 | free(buf); |
43df4f86 DP |
2523 | return ret; |
2524 | } | |
2525 | ||
58bf2a4c NTND |
2526 | static int index_stream_convert_blob(struct index_state *istate, |
2527 | struct object_id *oid, | |
2528 | int fd, | |
2529 | const char *path, | |
2530 | unsigned flags) | |
9035d75a | 2531 | { |
63e05f90 | 2532 | int ret = 0; |
9035d75a SP |
2533 | const int write_object = flags & HASH_WRITE_OBJECT; |
2534 | struct strbuf sbuf = STRBUF_INIT; | |
2535 | ||
2536 | assert(path); | |
58bf2a4c | 2537 | assert(would_convert_to_git_filter_fd(istate, path)); |
9035d75a | 2538 | |
58bf2a4c | 2539 | convert_to_git_filter_fd(istate, path, fd, &sbuf, |
8462ff43 | 2540 | get_conv_flags(flags)); |
9035d75a SP |
2541 | |
2542 | if (write_object) | |
c80d226a | 2543 | ret = write_object_file(sbuf.buf, sbuf.len, OBJ_BLOB, |
a09c985e | 2544 | oid); |
9035d75a | 2545 | else |
44439c1c ÆAB |
2546 | hash_object_file(the_hash_algo, sbuf.buf, sbuf.len, OBJ_BLOB, |
2547 | oid); | |
9035d75a SP |
2548 | strbuf_release(&sbuf); |
2549 | return ret; | |
2550 | } | |
2551 | ||
58bf2a4c NTND |
2552 | static int index_pipe(struct index_state *istate, struct object_id *oid, |
2553 | int fd, enum object_type type, | |
7b41e1e1 JH |
2554 | const char *path, unsigned flags) |
2555 | { | |
2556 | struct strbuf sbuf = STRBUF_INIT; | |
2557 | int ret; | |
2558 | ||
2559 | if (strbuf_read(&sbuf, fd, 4096) >= 0) | |
58bf2a4c | 2560 | ret = index_mem(istate, oid, sbuf.buf, sbuf.len, type, path, flags); |
7b41e1e1 JH |
2561 | else |
2562 | ret = -1; | |
2563 | strbuf_release(&sbuf); | |
2564 | return ret; | |
2565 | } | |
2566 | ||
ea68b0ce DP |
2567 | #define SMALL_FILE_SIZE (32*1024) |
2568 | ||
58bf2a4c NTND |
2569 | static int index_core(struct index_state *istate, |
2570 | struct object_id *oid, int fd, size_t size, | |
7b41e1e1 JH |
2571 | enum object_type type, const char *path, |
2572 | unsigned flags) | |
43df4f86 DP |
2573 | { |
2574 | int ret; | |
43df4f86 | 2575 | |
7b41e1e1 | 2576 | if (!size) { |
58bf2a4c | 2577 | ret = index_mem(istate, oid, "", size, type, path, flags); |
ea68b0ce DP |
2578 | } else if (size <= SMALL_FILE_SIZE) { |
2579 | char *buf = xmalloc(size); | |
90dca671 JK |
2580 | ssize_t read_result = read_in_full(fd, buf, size); |
2581 | if (read_result < 0) | |
259328b7 | 2582 | ret = error_errno(_("read error while indexing %s"), |
90dca671 JK |
2583 | path ? path : "<unknown>"); |
2584 | else if (read_result != size) | |
259328b7 | 2585 | ret = error(_("short read while indexing %s"), |
90dca671 | 2586 | path ? path : "<unknown>"); |
ea68b0ce | 2587 | else |
58bf2a4c | 2588 | ret = index_mem(istate, oid, buf, size, type, path, flags); |
ea68b0ce | 2589 | free(buf); |
08bda208 | 2590 | } else { |
43df4f86 | 2591 | void *buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0); |
58bf2a4c | 2592 | ret = index_mem(istate, oid, buf, size, type, path, flags); |
aac17941 | 2593 | munmap(buf, size); |
08bda208 | 2594 | } |
7b41e1e1 JH |
2595 | return ret; |
2596 | } | |
2597 | ||
4dd1fbc7 | 2598 | /* |
568508e7 JH |
2599 | * This creates one packfile per large blob unless bulk-checkin |
2600 | * machinery is "plugged". | |
4dd1fbc7 JH |
2601 | * |
2602 | * This also bypasses the usual "convert-to-git" dance, and that is on | |
2603 | * purpose. We could write a streaming version of the converting | |
2604 | * functions and insert that before feeding the data to fast-import | |
4f22b101 JK |
2605 | * (or equivalent in-core API described above). However, that is |
2606 | * somewhat complicated, as we do not know the size of the filter | |
2607 | * result, which we need to know beforehand when writing a git object. | |
2608 | * Since the primary motivation for trying to stream from the working | |
2609 | * tree file and to avoid mmaping it in core is to deal with large | |
2610 | * binary blobs, they generally do not want to get any conversion, and | |
2611 | * callers should avoid this code path when filters are requested. | |
4dd1fbc7 | 2612 | */ |
9eb54197 EB |
2613 | static int index_blob_stream(struct object_id *oid, int fd, size_t size, |
2614 | const char *path, | |
2615 | unsigned flags) | |
4dd1fbc7 | 2616 | { |
9eb54197 | 2617 | return index_blob_bulk_checkin(oid, fd, size, path, flags); |
4dd1fbc7 JH |
2618 | } |
2619 | ||
58bf2a4c NTND |
2620 | int index_fd(struct index_state *istate, struct object_id *oid, |
2621 | int fd, struct stat *st, | |
7b41e1e1 JH |
2622 | enum object_type type, const char *path, unsigned flags) |
2623 | { | |
2624 | int ret; | |
7b41e1e1 | 2625 | |
9079ab7c SP |
2626 | /* |
2627 | * Call xsize_t() only when needed to avoid potentially unnecessary | |
2628 | * die() for large files. | |
2629 | */ | |
58bf2a4c NTND |
2630 | if (type == OBJ_BLOB && path && would_convert_to_git_filter_fd(istate, path)) |
2631 | ret = index_stream_convert_blob(istate, oid, fd, path, flags); | |
9035d75a | 2632 | else if (!S_ISREG(st->st_mode)) |
58bf2a4c | 2633 | ret = index_pipe(istate, oid, fd, type, path, flags); |
9079ab7c | 2634 | else if (st->st_size <= big_file_threshold || type != OBJ_BLOB || |
58bf2a4c NTND |
2635 | (path && would_convert_to_git(istate, path))) |
2636 | ret = index_core(istate, oid, fd, xsize_t(st->st_size), | |
2637 | type, path, flags); | |
4dd1fbc7 | 2638 | else |
9eb54197 EB |
2639 | ret = index_blob_stream(oid, fd, xsize_t(st->st_size), path, |
2640 | flags); | |
43df4f86 | 2641 | close(fd); |
aac17941 | 2642 | return ret; |
74400e71 | 2643 | } |
ec1fcc16 | 2644 | |
58bf2a4c NTND |
2645 | int index_path(struct index_state *istate, struct object_id *oid, |
2646 | const char *path, struct stat *st, unsigned flags) | |
ec1fcc16 JH |
2647 | { |
2648 | int fd; | |
b760d3aa | 2649 | struct strbuf sb = STRBUF_INIT; |
ea8e0297 | 2650 | int rc = 0; |
ec1fcc16 JH |
2651 | |
2652 | switch (st->st_mode & S_IFMT) { | |
2653 | case S_IFREG: | |
2654 | fd = open(path, O_RDONLY); | |
2655 | if (fd < 0) | |
7616c6ca | 2656 | return error_errno("open(\"%s\")", path); |
58bf2a4c | 2657 | if (index_fd(istate, oid, fd, st, OBJ_BLOB, path, flags) < 0) |
259328b7 | 2658 | return error(_("%s: failed to insert into database"), |
ec1fcc16 JH |
2659 | path); |
2660 | break; | |
2661 | case S_IFLNK: | |
7616c6ca NTND |
2662 | if (strbuf_readlink(&sb, path, st->st_size)) |
2663 | return error_errno("readlink(\"%s\")", path); | |
c4ce46fc | 2664 | if (!(flags & HASH_WRITE_OBJECT)) |
2dcde20e | 2665 | hash_object_file(the_hash_algo, sb.buf, sb.len, |
44439c1c | 2666 | OBJ_BLOB, oid); |
c80d226a | 2667 | else if (write_object_file(sb.buf, sb.len, OBJ_BLOB, oid)) |
259328b7 | 2668 | rc = error(_("%s: failed to insert into database"), path); |
b760d3aa | 2669 | strbuf_release(&sb); |
ec1fcc16 | 2670 | break; |
f35a6d3b | 2671 | case S_IFDIR: |
a98e6101 | 2672 | return resolve_gitlink_ref(path, "HEAD", oid); |
ec1fcc16 | 2673 | default: |
259328b7 | 2674 | return error(_("%s: unsupported file type"), path); |
ec1fcc16 | 2675 | } |
ea8e0297 | 2676 | return rc; |
ec1fcc16 | 2677 | } |
a69e5429 JH |
2678 | |
2679 | int read_pack_header(int fd, struct pack_header *header) | |
2680 | { | |
f48ecd38 | 2681 | if (read_in_full(fd, header, sizeof(*header)) != sizeof(*header)) |
c697ad14 HO |
2682 | /* "eof before pack header was fully read" */ |
2683 | return PH_ERROR_EOF; | |
2684 | ||
a69e5429 JH |
2685 | if (header->hdr_signature != htonl(PACK_SIGNATURE)) |
2686 | /* "protocol error (pack signature mismatch detected)" */ | |
2687 | return PH_ERROR_PACK_SIGNATURE; | |
2688 | if (!pack_version_ok(header->hdr_version)) | |
2689 | /* "protocol error (pack version unsupported)" */ | |
2690 | return PH_ERROR_PROTOCOL; | |
2691 | return 0; | |
2692 | } | |
40d52ff7 | 2693 | |
e816caa0 | 2694 | void assert_oid_type(const struct object_id *oid, enum object_type expect) |
40d52ff7 | 2695 | { |
0df8e965 | 2696 | enum object_type type = oid_object_info(the_repository, oid, NULL); |
40d52ff7 | 2697 | if (type < 0) |
259328b7 | 2698 | die(_("%s is not a valid object"), oid_to_hex(oid)); |
40d52ff7 | 2699 | if (type != expect) |
259328b7 | 2700 | die(_("%s is not a valid '%s' object"), oid_to_hex(oid), |
debca9d2 | 2701 | type_name(expect)); |
40d52ff7 | 2702 | } |
27e1e22d | 2703 | |
70c49050 | 2704 | int for_each_file_in_obj_subdir(unsigned int subdir_nr, |
cc817ca3 RS |
2705 | struct strbuf *path, |
2706 | each_loose_object_fn obj_cb, | |
2707 | each_loose_cruft_fn cruft_cb, | |
2708 | each_loose_subdir_fn subdir_cb, | |
2709 | void *data) | |
27e1e22d | 2710 | { |
0375f472 RS |
2711 | size_t origlen, baselen; |
2712 | DIR *dir; | |
27e1e22d JK |
2713 | struct dirent *de; |
2714 | int r = 0; | |
62a24c89 | 2715 | struct object_id oid; |
27e1e22d | 2716 | |
70c49050 RS |
2717 | if (subdir_nr > 0xff) |
2718 | BUG("invalid loose object subdirectory: %x", subdir_nr); | |
2719 | ||
0375f472 RS |
2720 | origlen = path->len; |
2721 | strbuf_complete(path, '/'); | |
2722 | strbuf_addf(path, "%02x", subdir_nr); | |
0375f472 RS |
2723 | |
2724 | dir = opendir(path->buf); | |
27e1e22d | 2725 | if (!dir) { |
0375f472 | 2726 | if (errno != ENOENT) |
259328b7 | 2727 | r = error_errno(_("unable to open %s"), path->buf); |
0375f472 RS |
2728 | strbuf_setlen(path, origlen); |
2729 | return r; | |
27e1e22d JK |
2730 | } |
2731 | ||
62a24c89 | 2732 | oid.hash[0] = subdir_nr; |
163ee5e6 DS |
2733 | strbuf_addch(path, '/'); |
2734 | baselen = path->len; | |
62a24c89 | 2735 | |
b548f0f1 | 2736 | while ((de = readdir_skip_dot_and_dotdot(dir))) { |
163ee5e6 | 2737 | size_t namelen; |
27e1e22d | 2738 | |
163ee5e6 | 2739 | namelen = strlen(de->d_name); |
27e1e22d | 2740 | strbuf_setlen(path, baselen); |
163ee5e6 | 2741 | strbuf_add(path, de->d_name, namelen); |
94b5e093 | 2742 | if (namelen == the_hash_algo->hexsz - 2 && |
62a24c89 | 2743 | !hex_to_bytes(oid.hash + 1, de->d_name, |
94b5e093 | 2744 | the_hash_algo->rawsz - 1)) { |
5a6dce70 | 2745 | oid_set_algo(&oid, the_hash_algo); |
62a24c89 RS |
2746 | if (obj_cb) { |
2747 | r = obj_cb(&oid, path->buf, data); | |
2748 | if (r) | |
2749 | break; | |
27e1e22d | 2750 | } |
62a24c89 | 2751 | continue; |
27e1e22d JK |
2752 | } |
2753 | ||
2754 | if (cruft_cb) { | |
2755 | r = cruft_cb(de->d_name, path->buf, data); | |
2756 | if (r) | |
2757 | break; | |
2758 | } | |
2759 | } | |
094c7e63 | 2760 | closedir(dir); |
27e1e22d | 2761 | |
163ee5e6 | 2762 | strbuf_setlen(path, baselen - 1); |
27e1e22d JK |
2763 | if (!r && subdir_cb) |
2764 | r = subdir_cb(subdir_nr, path->buf, data); | |
2765 | ||
0375f472 RS |
2766 | strbuf_setlen(path, origlen); |
2767 | ||
27e1e22d JK |
2768 | return r; |
2769 | } | |
2770 | ||
e6f875e0 | 2771 | int for_each_loose_file_in_objdir_buf(struct strbuf *path, |
27e1e22d JK |
2772 | each_loose_object_fn obj_cb, |
2773 | each_loose_cruft_fn cruft_cb, | |
2774 | each_loose_subdir_fn subdir_cb, | |
2775 | void *data) | |
2776 | { | |
27e1e22d JK |
2777 | int r = 0; |
2778 | int i; | |
2779 | ||
27e1e22d | 2780 | for (i = 0; i < 256; i++) { |
e6f875e0 | 2781 | r = for_each_file_in_obj_subdir(i, path, obj_cb, cruft_cb, |
27e1e22d | 2782 | subdir_cb, data); |
27e1e22d JK |
2783 | if (r) |
2784 | break; | |
2785 | } | |
2786 | ||
e6f875e0 JK |
2787 | return r; |
2788 | } | |
2789 | ||
2790 | int for_each_loose_file_in_objdir(const char *path, | |
2791 | each_loose_object_fn obj_cb, | |
2792 | each_loose_cruft_fn cruft_cb, | |
2793 | each_loose_subdir_fn subdir_cb, | |
2794 | void *data) | |
2795 | { | |
2796 | struct strbuf buf = STRBUF_INIT; | |
2797 | int r; | |
2798 | ||
2799 | strbuf_addstr(&buf, path); | |
2800 | r = for_each_loose_file_in_objdir_buf(&buf, obj_cb, cruft_cb, | |
2801 | subdir_cb, data); | |
27e1e22d | 2802 | strbuf_release(&buf); |
e6f875e0 | 2803 | |
27e1e22d JK |
2804 | return r; |
2805 | } | |
660c889e | 2806 | |
a7ff6f5a JK |
2807 | int for_each_loose_object(each_loose_object_fn cb, void *data, |
2808 | enum for_each_object_flags flags) | |
660c889e | 2809 | { |
f0eaf638 | 2810 | struct object_directory *odb; |
b0a42642 | 2811 | |
f0eaf638 JK |
2812 | prepare_alt_odb(the_repository); |
2813 | for (odb = the_repository->objects->odb; odb; odb = odb->next) { | |
2814 | int r = for_each_loose_file_in_objdir(odb->path, cb, NULL, | |
2815 | NULL, data); | |
2816 | if (r) | |
2817 | return r; | |
660c889e | 2818 | |
f0eaf638 JK |
2819 | if (flags & FOR_EACH_OBJECT_LOCAL_ONLY) |
2820 | break; | |
2821 | } | |
1385bb7b | 2822 | |
f0eaf638 | 2823 | return 0; |
660c889e JK |
2824 | } |
2825 | ||
be252d33 JK |
2826 | static int append_loose_object(const struct object_id *oid, |
2827 | const char *path UNUSED, | |
3a2e0824 | 2828 | void *data) |
660c889e | 2829 | { |
92d8ed8a | 2830 | oidtree_insert(data, oid); |
3a2e0824 JK |
2831 | return 0; |
2832 | } | |
660c889e | 2833 | |
92d8ed8a | 2834 | struct oidtree *odb_loose_cache(struct object_directory *odb, |
0000d654 RS |
2835 | const struct object_id *oid) |
2836 | { | |
2837 | int subdir_nr = oid->hash[0]; | |
3a2e0824 | 2838 | struct strbuf buf = STRBUF_INIT; |
33f379ee EW |
2839 | size_t word_bits = bitsizeof(odb->loose_objects_subdir_seen[0]); |
2840 | size_t word_index = subdir_nr / word_bits; | |
26de1fc0 | 2841 | size_t mask = (size_t)1u << (subdir_nr % word_bits); |
33f379ee | 2842 | uint32_t *bitmap; |
660c889e | 2843 | |
3a2e0824 | 2844 | if (subdir_nr < 0 || |
33f379ee | 2845 | subdir_nr >= bitsizeof(odb->loose_objects_subdir_seen)) |
3a2e0824 | 2846 | BUG("subdir_nr out of range"); |
1385bb7b | 2847 | |
33f379ee EW |
2848 | bitmap = &odb->loose_objects_subdir_seen[word_index]; |
2849 | if (*bitmap & mask) | |
92d8ed8a EW |
2850 | return odb->loose_objects_cache; |
2851 | if (!odb->loose_objects_cache) { | |
2852 | ALLOC_ARRAY(odb->loose_objects_cache, 1); | |
2853 | oidtree_init(odb->loose_objects_cache); | |
2854 | } | |
3a2e0824 JK |
2855 | strbuf_addstr(&buf, odb->path); |
2856 | for_each_file_in_obj_subdir(subdir_nr, &buf, | |
2857 | append_loose_object, | |
2858 | NULL, NULL, | |
92d8ed8a | 2859 | odb->loose_objects_cache); |
33f379ee | 2860 | *bitmap |= mask; |
7317aa71 | 2861 | strbuf_release(&buf); |
92d8ed8a | 2862 | return odb->loose_objects_cache; |
660c889e JK |
2863 | } |
2864 | ||
d4e19e51 RS |
2865 | void odb_clear_loose_cache(struct object_directory *odb) |
2866 | { | |
92d8ed8a EW |
2867 | oidtree_clear(odb->loose_objects_cache); |
2868 | FREE_AND_NULL(odb->loose_objects_cache); | |
d4e19e51 RS |
2869 | memset(&odb->loose_objects_subdir_seen, 0, |
2870 | sizeof(odb->loose_objects_subdir_seen)); | |
2871 | } | |
2872 | ||
00a7760e JK |
2873 | static int check_stream_oid(git_zstream *stream, |
2874 | const char *hdr, | |
2875 | unsigned long size, | |
2876 | const char *path, | |
2877 | const struct object_id *expected_oid) | |
f6371f92 | 2878 | { |
18e2588e | 2879 | git_hash_ctx c; |
00a7760e | 2880 | struct object_id real_oid; |
f6371f92 JK |
2881 | unsigned char buf[4096]; |
2882 | unsigned long total_read; | |
2883 | int status = Z_OK; | |
2884 | ||
18e2588e | 2885 | the_hash_algo->init_fn(&c); |
2886 | the_hash_algo->update_fn(&c, hdr, stream->total_out); | |
f6371f92 JK |
2887 | |
2888 | /* | |
2889 | * We already read some bytes into hdr, but the ones up to the NUL | |
2890 | * do not count against the object's content size. | |
2891 | */ | |
2892 | total_read = stream->total_out - strlen(hdr) - 1; | |
2893 | ||
2894 | /* | |
2895 | * This size comparison must be "<=" to read the final zlib packets; | |
00a7760e | 2896 | * see the comment in unpack_loose_rest for details. |
f6371f92 JK |
2897 | */ |
2898 | while (total_read <= size && | |
18ad13e5 JH |
2899 | (status == Z_OK || |
2900 | (status == Z_BUF_ERROR && !stream->avail_out))) { | |
f6371f92 JK |
2901 | stream->next_out = buf; |
2902 | stream->avail_out = sizeof(buf); | |
2903 | if (size - total_read < stream->avail_out) | |
2904 | stream->avail_out = size - total_read; | |
2905 | status = git_inflate(stream, Z_FINISH); | |
18e2588e | 2906 | the_hash_algo->update_fn(&c, buf, stream->next_out - buf); |
f6371f92 JK |
2907 | total_read += stream->next_out - buf; |
2908 | } | |
2909 | git_inflate_end(stream); | |
2910 | ||
2911 | if (status != Z_STREAM_END) { | |
00a7760e | 2912 | error(_("corrupt loose object '%s'"), oid_to_hex(expected_oid)); |
f6371f92 JK |
2913 | return -1; |
2914 | } | |
cce044df | 2915 | if (stream->avail_in) { |
259328b7 | 2916 | error(_("garbage at end of loose object '%s'"), |
00a7760e | 2917 | oid_to_hex(expected_oid)); |
cce044df JK |
2918 | return -1; |
2919 | } | |
f6371f92 | 2920 | |
5951bf46 | 2921 | the_hash_algo->final_oid_fn(&real_oid, &c); |
00a7760e | 2922 | if (!oideq(expected_oid, &real_oid)) { |
01f8d594 | 2923 | error(_("hash mismatch for %s (expected %s)"), path, |
00a7760e | 2924 | oid_to_hex(expected_oid)); |
f6371f92 JK |
2925 | return -1; |
2926 | } | |
2927 | ||
2928 | return 0; | |
2929 | } | |
2930 | ||
2931 | int read_loose_object(const char *path, | |
d61d87bd | 2932 | const struct object_id *expected_oid, |
96e41f58 | 2933 | struct object_id *real_oid, |
31deb28f ÆAB |
2934 | void **contents, |
2935 | struct object_info *oi) | |
f6371f92 JK |
2936 | { |
2937 | int ret = -1; | |
ae285ac4 | 2938 | int fd; |
f6371f92 JK |
2939 | void *map = NULL; |
2940 | unsigned long mapsize; | |
2941 | git_zstream stream; | |
1af64f73 | 2942 | char hdr[MAX_HEADER_LEN]; |
31deb28f | 2943 | unsigned long *size = oi->sizep; |
f6371f92 | 2944 | |
ae285ac4 JT |
2945 | fd = git_open(path); |
2946 | if (fd >= 0) | |
2947 | map = map_fd(fd, path, &mapsize); | |
f6371f92 | 2948 | if (!map) { |
259328b7 | 2949 | error_errno(_("unable to mmap %s"), path); |
f6371f92 JK |
2950 | goto out; |
2951 | } | |
2952 | ||
8a50571a DS |
2953 | if (unpack_loose_header(&stream, map, mapsize, hdr, sizeof(hdr), |
2954 | NULL) != ULHR_OK) { | |
259328b7 | 2955 | error(_("unable to unpack header of %s"), path); |
f6371f92 JK |
2956 | goto out; |
2957 | } | |
2958 | ||
31deb28f | 2959 | if (parse_loose_header(hdr, oi) < 0) { |
259328b7 | 2960 | error(_("unable to parse header of %s"), path); |
f6371f92 JK |
2961 | git_inflate_end(&stream); |
2962 | goto out; | |
2963 | } | |
2964 | ||
31deb28f | 2965 | if (*oi->typep == OBJ_BLOB && *size > big_file_threshold) { |
00a7760e | 2966 | if (check_stream_oid(&stream, hdr, *size, path, expected_oid) < 0) |
f6371f92 JK |
2967 | goto out; |
2968 | } else { | |
00a7760e | 2969 | *contents = unpack_loose_rest(&stream, hdr, *size, expected_oid); |
f6371f92 | 2970 | if (!*contents) { |
259328b7 | 2971 | error(_("unable to unpack contents of %s"), path); |
f6371f92 JK |
2972 | git_inflate_end(&stream); |
2973 | goto out; | |
2974 | } | |
44439c1c | 2975 | hash_object_file_literally(the_repository->hash_algo, |
16235e3b | 2976 | *contents, *size, |
44439c1c | 2977 | oi->type_name->buf, real_oid); |
0f156dbb | 2978 | if (!oideq(expected_oid, real_oid)) |
f6371f92 | 2979 | goto out; |
f6371f92 JK |
2980 | } |
2981 | ||
2982 | ret = 0; /* everything checks out */ | |
2983 | ||
2984 | out: | |
2985 | if (map) | |
2986 | munmap(map, mapsize); | |
f6371f92 JK |
2987 | return ret; |
2988 | } |