diff options
Diffstat (limited to 'sha1-file.c')
| -rw-r--r-- | sha1-file.c | 491 |
1 files changed, 282 insertions, 209 deletions
diff --git a/sha1-file.c b/sha1-file.c index 5bd11c8..494606f 100644 --- a/sha1-file.c +++ b/sha1-file.c @@ -40,10 +40,20 @@ #define EMPTY_TREE_SHA1_BIN_LITERAL \ "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" +#define EMPTY_TREE_SHA256_BIN_LITERAL \ + "\x6e\xf1\x9b\x41\x22\x5c\x53\x69\xf1\xc1" \ + "\x04\xd4\x5d\x8d\x85\xef\xa9\xb0\x57\xb5" \ + "\x3b\x14\xb4\xb9\xb9\x39\xdd\x74\xde\xcc" \ + "\x53\x21" #define EMPTY_BLOB_SHA1_BIN_LITERAL \ "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" +#define EMPTY_BLOB_SHA256_BIN_LITERAL \ + "\x47\x3a\x0f\x4c\x3b\xe8\xa9\x36\x81\xa2" \ + "\x67\xe3\xb1\xe9\xa7\xdc\xda\x11\x85\x43" \ + "\x6f\xe1\x41\xf7\x74\x91\x20\xa3\x03\x72" \ + "\x18\x13" const unsigned char null_sha1[GIT_MAX_RAWSZ]; const struct object_id null_oid; @@ -53,6 +63,12 @@ static const struct object_id empty_tree_oid = { static const struct object_id empty_blob_oid = { EMPTY_BLOB_SHA1_BIN_LITERAL }; +static const struct object_id empty_tree_oid_sha256 = { + EMPTY_TREE_SHA256_BIN_LITERAL +}; +static const struct object_id empty_blob_oid_sha256 = { + EMPTY_BLOB_SHA256_BIN_LITERAL +}; static void git_hash_sha1_init(git_hash_ctx *ctx) { @@ -69,6 +85,22 @@ static void git_hash_sha1_final(unsigned char *hash, git_hash_ctx *ctx) git_SHA1_Final(hash, &ctx->sha1); } + +static void git_hash_sha256_init(git_hash_ctx *ctx) +{ + git_SHA256_Init(&ctx->sha256); +} + +static void git_hash_sha256_update(git_hash_ctx *ctx, const void *data, size_t len) +{ + git_SHA256_Update(&ctx->sha256, data, len); +} + +static void git_hash_sha256_final(unsigned char *hash, git_hash_ctx *ctx) +{ + git_SHA256_Final(hash, &ctx->sha256); +} + static void git_hash_unknown_init(git_hash_ctx *ctx) { BUG("trying to init unknown hash"); @@ -90,6 +122,7 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = { 0x00000000, 0, 0, + 0, git_hash_unknown_init, git_hash_unknown_update, git_hash_unknown_final, @@ -97,17 +130,31 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = { NULL, }, { - "sha-1", + "sha1", /* "sha1", big-endian */ 0x73686131, GIT_SHA1_RAWSZ, GIT_SHA1_HEXSZ, + GIT_SHA1_BLKSZ, git_hash_sha1_init, git_hash_sha1_update, git_hash_sha1_final, &empty_tree_oid, &empty_blob_oid, }, + { + "sha256", + /* "s256", big-endian */ + 0x73323536, + GIT_SHA256_RAWSZ, + GIT_SHA256_HEXSZ, + GIT_SHA256_BLKSZ, + git_hash_sha256_init, + git_hash_sha256_update, + git_hash_sha256_final, + &empty_tree_oid_sha256, + &empty_blob_oid_sha256, + } }; const char *empty_tree_oid_hex(void) @@ -122,9 +169,30 @@ const char *empty_blob_oid_hex(void) return oid_to_hex_r(buf, the_hash_algo->empty_blob); } +int hash_algo_by_name(const char *name) +{ + int i; + if (!name) + return GIT_HASH_UNKNOWN; + for (i = 1; i < GIT_HASH_NALGOS; i++) + if (!strcmp(name, hash_algos[i].name)) + return i; + return GIT_HASH_UNKNOWN; +} + +int hash_algo_by_id(uint32_t format_id) +{ + int i; + for (i = 1; i < GIT_HASH_NALGOS; i++) + if (format_id == hash_algos[i].format_id) + return i; + return GIT_HASH_UNKNOWN; +} + + /* * This is meant to hold a *small* number of objects that you would - * want read_sha1_file() to be able to return, but yet you do not want + * want read_object_file() to be able to return, but yet you do not want * to write them into the object store (e.g. a browse-only * application). */ @@ -333,12 +401,12 @@ out: return ret; } -static void fill_sha1_path(struct strbuf *buf, const unsigned char *sha1) +static void fill_loose_path(struct strbuf *buf, const struct object_id *oid) { int i; for (i = 0; i < the_hash_algo->rawsz; i++) { static char hex[] = "0123456789abcdef"; - unsigned int val = sha1[i]; + unsigned int val = oid->hash[i]; strbuf_addch(buf, hex[val >> 4]); strbuf_addch(buf, hex[val & 0xf]); if (!i) @@ -346,25 +414,21 @@ static void fill_sha1_path(struct strbuf *buf, const unsigned char *sha1) } } -void sha1_file_name(struct repository *r, struct strbuf *buf, const unsigned char *sha1) +static const char *odb_loose_path(struct object_directory *odb, + struct strbuf *buf, + const struct object_id *oid) { - strbuf_addstr(buf, r->objects->objectdir); + strbuf_reset(buf); + strbuf_addstr(buf, odb->path); strbuf_addch(buf, '/'); - fill_sha1_path(buf, sha1); -} - -struct strbuf *alt_scratch_buf(struct alternate_object_database *alt) -{ - strbuf_setlen(&alt->scratch, alt->base_len); - return &alt->scratch; + fill_loose_path(buf, oid); + return buf->buf; } -static const char *alt_sha1_path(struct alternate_object_database *alt, - const unsigned char *sha1) +const char *loose_object_path(struct repository *r, struct strbuf *buf, + const struct object_id *oid) { - struct strbuf *buf = alt_scratch_buf(alt); - fill_sha1_path(buf, sha1); - return buf->buf; + return odb_loose_path(r->objects->odb, buf, oid); } /* @@ -374,7 +438,7 @@ static int alt_odb_usable(struct raw_object_store *o, struct strbuf *path, const char *normalized_objdir) { - struct alternate_object_database *alt; + struct object_directory *odb; /* Detect cases where alternate disappeared */ if (!is_directory(path->buf)) { @@ -388,8 +452,8 @@ static int alt_odb_usable(struct raw_object_store *o, * Prevent the common mistake of listing the same * thing twice, or object directory itself. */ - for (alt = o->alt_odb_list; alt; alt = alt->next) { - if (!fspathcmp(path->buf, alt->path)) + for (odb = o->odb; odb; odb = odb->next) { + if (!fspathcmp(path->buf, odb->path)) return 0; } if (!fspathcmp(path->buf, normalized_objdir)) @@ -402,7 +466,7 @@ static int alt_odb_usable(struct raw_object_store *o, * Prepare alternate object database registry. * * The variable alt_odb_list points at the list of struct - * alternate_object_database. The elements on this list come from + * object_directory. The elements on this list come from * non-empty elements from colon separated ALTERNATE_DB_ENVIRONMENT * environment variable, and $GIT_OBJECT_DIRECTORY/info/alternates, * whose contents is similar to that environment variable but can be @@ -419,7 +483,7 @@ static void read_info_alternates(struct repository *r, static int link_alt_odb_entry(struct repository *r, const char *entry, const char *relative_base, int depth, const char *normalized_objdir) { - struct alternate_object_database *ent; + struct object_directory *ent; struct strbuf pathbuf = STRBUF_INIT; if (!is_absolute_path(entry) && relative_base) { @@ -447,11 +511,12 @@ static int link_alt_odb_entry(struct repository *r, const char *entry, return -1; } - ent = alloc_alt_odb(pathbuf.buf); + ent = xcalloc(1, sizeof(*ent)); + ent->path = xstrdup(pathbuf.buf); /* add the alternate entry */ - *r->objects->alt_odb_tail = ent; - r->objects->alt_odb_tail = &(ent->next); + *r->objects->odb_tail = ent; + r->objects->odb_tail = &(ent->next); ent->next = NULL; /* recursively add alternates */ @@ -505,7 +570,7 @@ static void link_alt_odb_entries(struct repository *r, const char *alt, return; } - strbuf_add_absolute_path(&objdirbuf, r->objects->objectdir); + strbuf_add_absolute_path(&objdirbuf, r->objects->odb->path); if (strbuf_normalize_path(&objdirbuf) < 0) die(_("unable to normalize object directory: %s"), objdirbuf.buf); @@ -540,18 +605,6 @@ static void read_info_alternates(struct repository *r, free(path); } -struct alternate_object_database *alloc_alt_odb(const char *dir) -{ - struct alternate_object_database *ent; - - FLEX_ALLOC_STR(ent, path, dir); - strbuf_init(&ent->scratch, 0); - strbuf_addf(&ent->scratch, "%s/", dir); - ent->base_len = ent->scratch.len; - - return ent; -} - void add_to_alternates_file(const char *reference) { struct lock_file lock = LOCK_INIT; @@ -588,7 +641,7 @@ void add_to_alternates_file(const char *reference) fprintf_or_die(out, "%s\n", reference); if (commit_lock_file(&lock)) die_errno(_("unable to move new alternates file into place")); - if (the_repository->objects->alt_odb_tail) + if (the_repository->objects->loaded_alternates) link_alt_odb_entries(the_repository, reference, '\n', NULL, 0); } @@ -684,11 +737,11 @@ out: int foreach_alt_odb(alt_odb_fn fn, void *cb) { - struct alternate_object_database *ent; + struct object_directory *ent; int r = 0; prepare_alt_odb(the_repository); - for (ent = the_repository->objects->alt_odb_list; ent; ent = ent->next) { + for (ent = the_repository->objects->odb->next; ent; ent = ent->next) { r = fn(ent, cb); if (r) break; @@ -698,13 +751,13 @@ int foreach_alt_odb(alt_odb_fn fn, void *cb) void prepare_alt_odb(struct repository *r) { - if (r->objects->alt_odb_tail) + if (r->objects->loaded_alternates) return; - r->objects->alt_odb_tail = &r->objects->alt_odb_list; link_alt_odb_entries(r, r->objects->alternate_db, PATH_SEP, NULL, 0); - read_info_alternates(r, r->objects->objectdir, 0); + read_info_alternates(r, r->objects->odb->path, 0); + r->objects->loaded_alternates = 1; } /* Returns 1 if we have successfully freshened the file, 0 otherwise. */ @@ -731,23 +784,27 @@ int check_and_freshen_file(const char *fn, int freshen) return 1; } -static int check_and_freshen_local(const struct object_id *oid, int freshen) +static int check_and_freshen_odb(struct object_directory *odb, + const struct object_id *oid, + int freshen) { - static struct strbuf buf = STRBUF_INIT; - - strbuf_reset(&buf); - sha1_file_name(the_repository, &buf, oid->hash); + static struct strbuf path = STRBUF_INIT; + odb_loose_path(odb, &path, oid); + return check_and_freshen_file(path.buf, freshen); +} - return check_and_freshen_file(buf.buf, freshen); +static int check_and_freshen_local(const struct object_id *oid, int freshen) +{ + return check_and_freshen_odb(the_repository->objects->odb, oid, freshen); } static int check_and_freshen_nonlocal(const struct object_id *oid, int freshen) { - struct alternate_object_database *alt; + struct object_directory *odb; + prepare_alt_odb(the_repository); - for (alt = the_repository->objects->alt_odb_list; alt; alt = alt->next) { - const char *path = alt_sha1_path(alt, oid->hash); - if (check_and_freshen_file(path, freshen)) + for (odb = the_repository->objects->odb->next; odb; odb = odb->next) { + if (check_and_freshen_odb(odb, oid, freshen)) return 1; } return 0; @@ -809,8 +866,8 @@ void *xmmap(void *start, size_t length, /* * With an in-core object data in "map", rehash it to make sure the - * object name actually matches "sha1" to detect object corruption. - * With "map" == NULL, try reading the object named with "sha1" using + * object name actually matches "oid" to detect object corruption. + * With "map" == NULL, try reading the object named with "oid" using * the streaming interface and rehash it to do the same. */ int check_object_signature(const struct object_id *oid, void *map, @@ -883,30 +940,22 @@ int git_open_cloexec(const char *name, int flags) } /* - * Find "sha1" as a loose object in the local repository or in an alternate. + * Find "oid" as a loose object in the local repository or in an alternate. * Returns 0 on success, negative on failure. * * The "path" out-parameter will give the path of the object we found (if any). * Note that it may point to static storage and is only valid until another - * call to sha1_file_name(), etc. + * call to stat_loose_object(). */ -static int stat_sha1_file(struct repository *r, const unsigned char *sha1, - struct stat *st, const char **path) +static int stat_loose_object(struct repository *r, const struct object_id *oid, + struct stat *st, const char **path) { - struct alternate_object_database *alt; + struct object_directory *odb; static struct strbuf buf = STRBUF_INIT; - strbuf_reset(&buf); - sha1_file_name(r, &buf, sha1); - *path = buf.buf; - - if (!lstat(*path, st)) - return 0; - prepare_alt_odb(r); - errno = ENOENT; - for (alt = r->objects->alt_odb_list; alt; alt = alt->next) { - *path = alt_sha1_path(alt, sha1); + for (odb = r->objects->odb; odb; odb = odb->next) { + *path = odb_loose_path(odb, &buf, oid); if (!lstat(*path, st)) return 0; } @@ -915,32 +964,24 @@ static int stat_sha1_file(struct repository *r, const unsigned char *sha1, } /* - * Like stat_sha1_file(), but actually open the object and return the + * Like stat_loose_object(), but actually open the object and return the * descriptor. See the caveats on the "path" parameter above. */ -static int open_sha1_file(struct repository *r, - const unsigned char *sha1, const char **path) +static int open_loose_object(struct repository *r, + const struct object_id *oid, const char **path) { int fd; - struct alternate_object_database *alt; - int most_interesting_errno; + struct object_directory *odb; + int most_interesting_errno = ENOENT; static struct strbuf buf = STRBUF_INIT; - strbuf_reset(&buf); - sha1_file_name(r, &buf, sha1); - *path = buf.buf; - - fd = git_open(*path); - if (fd >= 0) - return fd; - most_interesting_errno = errno; - prepare_alt_odb(r); - for (alt = r->objects->alt_odb_list; alt; alt = alt->next) { - *path = alt_sha1_path(alt, sha1); + for (odb = r->objects->odb; odb; odb = odb->next) { + *path = odb_loose_path(odb, &buf, oid); fd = git_open(*path); if (fd >= 0) return fd; + if (most_interesting_errno == ENOENT) most_interesting_errno = errno; } @@ -948,12 +989,25 @@ static int open_sha1_file(struct repository *r, return -1; } +static int quick_has_loose(struct repository *r, + const struct object_id *oid) +{ + struct object_directory *odb; + + prepare_alt_odb(r); + for (odb = r->objects->odb; odb; odb = odb->next) { + if (oid_array_lookup(odb_loose_cache(odb, oid), oid) >= 0) + return 1; + } + return 0; +} + /* * Map the loose object at "path" if it is not NULL, or the path found by - * searching for a loose object named "sha1". + * searching for a loose object named "oid". */ -static void *map_sha1_file_1(struct repository *r, const char *path, - const unsigned char *sha1, unsigned long *size) +static void *map_loose_object_1(struct repository *r, const char *path, + const struct object_id *oid, unsigned long *size) { void *map; int fd; @@ -961,7 +1015,7 @@ static void *map_sha1_file_1(struct repository *r, const char *path, if (path) fd = git_open(path); else - fd = open_sha1_file(r, sha1, &path); + fd = open_loose_object(r, oid, &path); map = NULL; if (fd >= 0) { struct stat st; @@ -971,6 +1025,7 @@ static void *map_sha1_file_1(struct repository *r, const char *path, if (!*size) { /* mmap() is forbidden on empty files */ error(_("object file %s is empty"), path); + close(fd); return NULL; } map = xmmap(NULL, *size, PROT_READ, MAP_PRIVATE, fd, 0); @@ -980,15 +1035,16 @@ static void *map_sha1_file_1(struct repository *r, const char *path, return map; } -void *map_sha1_file(struct repository *r, - const unsigned char *sha1, unsigned long *size) +void *map_loose_object(struct repository *r, + const struct object_id *oid, + unsigned long *size) { - return map_sha1_file_1(r, NULL, sha1, size); + return map_loose_object_1(r, NULL, oid, size); } -static int unpack_sha1_short_header(git_zstream *stream, - unsigned char *map, unsigned long mapsize, - void *buffer, unsigned long bufsiz) +static int unpack_loose_short_header(git_zstream *stream, + unsigned char *map, unsigned long mapsize, + void *buffer, unsigned long bufsiz) { /* Get the data stream */ memset(stream, 0, sizeof(*stream)); @@ -1001,12 +1057,12 @@ static int unpack_sha1_short_header(git_zstream *stream, return git_inflate(stream, 0); } -int unpack_sha1_header(git_zstream *stream, - unsigned char *map, unsigned long mapsize, - void *buffer, unsigned long bufsiz) +int unpack_loose_header(git_zstream *stream, + unsigned char *map, unsigned long mapsize, + void *buffer, unsigned long bufsiz) { - int status = unpack_sha1_short_header(stream, map, mapsize, - buffer, bufsiz); + int status = unpack_loose_short_header(stream, map, mapsize, + buffer, bufsiz); if (status < Z_OK) return status; @@ -1017,13 +1073,13 @@ int unpack_sha1_header(git_zstream *stream, return 0; } -static int unpack_sha1_header_to_strbuf(git_zstream *stream, unsigned char *map, - unsigned long mapsize, void *buffer, - unsigned long bufsiz, struct strbuf *header) +static int unpack_loose_header_to_strbuf(git_zstream *stream, unsigned char *map, + unsigned long mapsize, void *buffer, + unsigned long bufsiz, struct strbuf *header) { int status; - status = unpack_sha1_short_header(stream, map, mapsize, buffer, bufsiz); + status = unpack_loose_short_header(stream, map, mapsize, buffer, bufsiz); if (status < Z_OK) return -1; @@ -1053,7 +1109,9 @@ static int unpack_sha1_header_to_strbuf(git_zstream *stream, unsigned char *map, return -1; } -static void *unpack_sha1_rest(git_zstream *stream, void *buffer, unsigned long size, const unsigned char *sha1) +static void *unpack_loose_rest(git_zstream *stream, + void *buffer, unsigned long size, + const struct object_id *oid) { int bytes = strlen(buffer) + 1; unsigned char *buf = xmallocz(size); @@ -1090,10 +1148,10 @@ static void *unpack_sha1_rest(git_zstream *stream, void *buffer, unsigned long s } if (status < 0) - error(_("corrupt loose object '%s'"), sha1_to_hex(sha1)); + error(_("corrupt loose object '%s'"), oid_to_hex(oid)); else if (stream->avail_in) error(_("garbage at end of loose object '%s'"), - sha1_to_hex(sha1)); + oid_to_hex(oid)); free(buf); return NULL; } @@ -1103,8 +1161,8 @@ static void *unpack_sha1_rest(git_zstream *stream, void *buffer, unsigned long s * too permissive for what we want to check. So do an anal * object header parse by hand. */ -static int parse_sha1_header_extended(const char *hdr, struct object_info *oi, - unsigned int flags) +static int parse_loose_header_extended(const char *hdr, struct object_info *oi, + unsigned int flags) { const char *type_buf = hdr; unsigned long size; @@ -1164,17 +1222,17 @@ static int parse_sha1_header_extended(const char *hdr, struct object_info *oi, return *hdr ? -1 : type; } -int parse_sha1_header(const char *hdr, unsigned long *sizep) +int parse_loose_header(const char *hdr, unsigned long *sizep) { struct object_info oi = OBJECT_INFO_INIT; oi.sizep = sizep; - return parse_sha1_header_extended(hdr, &oi, 0); + return parse_loose_header_extended(hdr, &oi, 0); } -static int sha1_loose_object_info(struct repository *r, - const unsigned char *sha1, - struct object_info *oi, int flags) +static int loose_object_info(struct repository *r, + const struct object_id *oid, + struct object_info *oi, int flags) { int status = 0; unsigned long mapsize; @@ -1198,14 +1256,16 @@ static int sha1_loose_object_info(struct repository *r, if (!oi->typep && !oi->type_name && !oi->sizep && !oi->contentp) { const char *path; struct stat st; - if (stat_sha1_file(r, sha1, &st, &path) < 0) + if (!oi->disk_sizep && (flags & OBJECT_INFO_QUICK)) + return quick_has_loose(r, oid) ? 0 : -1; + if (stat_loose_object(r, oid, &st, &path) < 0) return -1; if (oi->disk_sizep) *oi->disk_sizep = st.st_size; return 0; } - map = map_sha1_file(r, sha1, &mapsize); + map = map_loose_object(r, oid, &mapsize); if (!map) return -1; @@ -1215,24 +1275,24 @@ static int sha1_loose_object_info(struct repository *r, if (oi->disk_sizep) *oi->disk_sizep = mapsize; if ((flags & OBJECT_INFO_ALLOW_UNKNOWN_TYPE)) { - if (unpack_sha1_header_to_strbuf(&stream, map, mapsize, hdr, sizeof(hdr), &hdrbuf) < 0) + if (unpack_loose_header_to_strbuf(&stream, map, mapsize, hdr, sizeof(hdr), &hdrbuf) < 0) status = error(_("unable to unpack %s header with --allow-unknown-type"), - sha1_to_hex(sha1)); - } else if (unpack_sha1_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0) + oid_to_hex(oid)); + } else if (unpack_loose_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0) status = error(_("unable to unpack %s header"), - sha1_to_hex(sha1)); + oid_to_hex(oid)); if (status < 0) ; /* Do nothing */ else if (hdrbuf.len) { - if ((status = parse_sha1_header_extended(hdrbuf.buf, oi, flags)) < 0) + if ((status = parse_loose_header_extended(hdrbuf.buf, oi, flags)) < 0) status = error(_("unable to parse %s header with --allow-unknown-type"), - sha1_to_hex(sha1)); - } else if ((status = parse_sha1_header_extended(hdr, oi, flags)) < 0) - status = error(_("unable to parse %s header"), sha1_to_hex(sha1)); + oid_to_hex(oid)); + } else if ((status = parse_loose_header_extended(hdr, oi, flags)) < 0) + status = error(_("unable to parse %s header"), oid_to_hex(oid)); if (status >= 0 && oi->contentp) { - *oi->contentp = unpack_sha1_rest(&stream, hdr, - *oi->sizep, sha1); + *oi->contentp = unpack_loose_rest(&stream, hdr, + *oi->sizep, oid); if (!*oi->contentp) { git_inflate_end(&stream); status = -1; @@ -1298,7 +1358,7 @@ int oid_object_info_extended(struct repository *r, const struct object_id *oid, return -1; /* Most likely it's a loose object. */ - if (!sha1_loose_object_info(r, real->hash, oi, flags)) + if (!loose_object_info(r, real, oi, flags)) return 0; /* Not a loose object; someone else may have just packed it. */ @@ -1361,19 +1421,17 @@ int oid_object_info(struct repository *r, return type; } -static void *read_object(const unsigned char *sha1, enum object_type *type, +static void *read_object(struct repository *r, + const struct object_id *oid, enum object_type *type, unsigned long *size) { - struct object_id oid; struct object_info oi = OBJECT_INFO_INIT; void *content; oi.typep = type; oi.sizep = size; oi.contentp = &content; - hashcpy(oid.hash, sha1); - - if (oid_object_info_extended(the_repository, &oid, &oi, 0) < 0) + if (oid_object_info_extended(r, oid, &oi, 0) < 0) return NULL; return content; } @@ -1384,7 +1442,7 @@ int pretend_object_file(void *buf, unsigned long len, enum object_type type, struct cached_object *co; hash_object_file(buf, len, type_name(type), oid); - if (has_sha1_file(oid->hash) || find_cached_object(oid)) + if (has_object_file(oid) || find_cached_object(oid)) return 0; ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc); co = &cached_objects[cached_object_nr++]; @@ -1401,7 +1459,8 @@ int pretend_object_file(void *buf, unsigned long len, enum object_type type, * deal with them should arrange to call read_object() and give error * messages themselves. */ -void *read_object_file_extended(const struct object_id *oid, +void *read_object_file_extended(struct repository *r, + const struct object_id *oid, enum object_type *type, unsigned long *size, int lookup_replace) @@ -1411,10 +1470,10 @@ void *read_object_file_extended(const struct object_id *oid, const char *path; struct stat st; const struct object_id *repl = lookup_replace ? - lookup_replace_object(the_repository, oid) : oid; + lookup_replace_object(r, oid) : oid; errno = 0; - data = read_object(repl->hash, type, size); + data = read_object(r, repl, type, size); if (data) return data; @@ -1426,11 +1485,11 @@ void *read_object_file_extended(const struct object_id *oid, die(_("replacement %s not found for %s"), oid_to_hex(repl), oid_to_hex(oid)); - if (!stat_sha1_file(the_repository, repl->hash, &st, &path)) + if (!stat_loose_object(r, repl, &st, &path)) die(_("loose object %s (stored in %s) is corrupt"), oid_to_hex(repl), path); - if ((p = has_packed_and_bad(repl->hash)) != NULL) + if ((p = has_packed_and_bad(r, repl->hash)) != NULL) die(_("packed object %s (stored in %s) is corrupt"), oid_to_hex(repl), p->pack_name); @@ -1533,7 +1592,7 @@ int finalize_object_file(const char *tmpfile, const char *filename) unlink_or_warn(tmpfile); if (ret) { if (ret != EEXIST) { - return error_errno(_("unable to write sha1 filename %s"), filename); + return error_errno(_("unable to write file %s"), filename); } /* FIXME!!! Collision check here ? */ } @@ -1561,12 +1620,12 @@ int hash_object_file(const void *buf, unsigned long len, const char *type, } /* Finalize a file on disk, and close it. */ -static void close_sha1_file(int fd) +static void close_loose_object(int fd) { if (fsync_object_files) - fsync_or_die(fd, "sha1 file"); + fsync_or_die(fd, "loose object file"); if (close(fd) != 0) - die_errno(_("error when closing sha1 file")); + die_errno(_("error when closing loose object file")); } /* Size of directory component, including the ending '/' */ @@ -1626,8 +1685,7 @@ static int write_loose_object(const struct object_id *oid, char *hdr, static struct strbuf tmp_file = STRBUF_INIT; static struct strbuf filename = STRBUF_INIT; - strbuf_reset(&filename); - sha1_file_name(the_repository, &filename, oid->hash); + loose_object_path(the_repository, &filename, oid); fd = create_tmpfile(&tmp_file, filename.buf); if (fd < 0) { @@ -1658,7 +1716,7 @@ static int write_loose_object(const struct object_id *oid, char *hdr, ret = git_deflate(&stream, Z_FINISH); the_hash_algo->update_fn(&c, in0, stream.next_in - in0); if (write_buffer(fd, compressed, stream.next_out - compressed) < 0) - die(_("unable to write sha1 file")); + die(_("unable to write loose object file")); stream.next_out = compressed; stream.avail_out = sizeof(compressed); } while (ret == Z_OK); @@ -1675,7 +1733,7 @@ static int write_loose_object(const struct object_id *oid, char *hdr, die(_("confused by unstable object source data for %s"), oid_to_hex(oid)); - close_sha1_file(fd); + close_loose_object(fd); if (mtime) { struct utimbuf utb; @@ -1755,9 +1813,9 @@ int force_object_loose(const struct object_id *oid, time_t mtime) if (has_loose_object(oid)) return 0; - buf = read_object(oid->hash, &type, &len); + buf = read_object(the_repository, oid, &type, &len); if (!buf) - return error(_("cannot read sha1_file for %s"), oid_to_hex(oid)); + return error(_("cannot read object for %s"), oid_to_hex(oid)); hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %"PRIuMAX , type_name(type), (uintmax_t)len) + 1; ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime); free(buf); @@ -1765,24 +1823,19 @@ int force_object_loose(const struct object_id *oid, time_t mtime) return ret; } -int has_sha1_file_with_flags(const unsigned char *sha1, int flags) +int repo_has_object_file_with_flags(struct repository *r, + const struct object_id *oid, int flags) { - struct object_id oid; if (!startup_info->have_repository) return 0; - hashcpy(oid.hash, sha1); - return oid_object_info_extended(the_repository, &oid, NULL, + return oid_object_info_extended(r, oid, NULL, flags | OBJECT_INFO_SKIP_CACHED) >= 0; } -int has_object_file(const struct object_id *oid) +int repo_has_object_file(struct repository *r, + const struct object_id *oid) { - return has_sha1_file(oid->hash); -} - -int has_object_file_with_flags(const struct object_id *oid, int flags) -{ - return has_sha1_file_with_flags(oid->hash, flags); + return repo_has_object_file_with_flags(r, oid, 0); } static void check_tree(const void *buf, size_t size) @@ -2134,53 +2187,73 @@ int for_each_loose_file_in_objdir(const char *path, return r; } -struct loose_alt_odb_data { - each_loose_object_fn *cb; - void *data; -}; +int for_each_loose_object(each_loose_object_fn cb, void *data, + enum for_each_object_flags flags) +{ + struct object_directory *odb; + + prepare_alt_odb(the_repository); + for (odb = the_repository->objects->odb; odb; odb = odb->next) { + int r = for_each_loose_file_in_objdir(odb->path, cb, NULL, + NULL, data); + if (r) + return r; + + if (flags & FOR_EACH_OBJECT_LOCAL_ONLY) + break; + } + + return 0; +} + +static int append_loose_object(const struct object_id *oid, const char *path, + void *data) +{ + oid_array_append(data, oid); + return 0; +} -static int loose_from_alt_odb(struct alternate_object_database *alt, - void *vdata) +struct oid_array *odb_loose_cache(struct object_directory *odb, + const struct object_id *oid) { - struct loose_alt_odb_data *data = vdata; + int subdir_nr = oid->hash[0]; struct strbuf buf = STRBUF_INIT; - int r; - strbuf_addstr(&buf, alt->path); - r = for_each_loose_file_in_objdir_buf(&buf, - data->cb, NULL, NULL, - data->data); + if (subdir_nr < 0 || + subdir_nr >= ARRAY_SIZE(odb->loose_objects_subdir_seen)) + BUG("subdir_nr out of range"); + + if (odb->loose_objects_subdir_seen[subdir_nr]) + return &odb->loose_objects_cache[subdir_nr]; + + strbuf_addstr(&buf, odb->path); + for_each_file_in_obj_subdir(subdir_nr, &buf, + append_loose_object, + NULL, NULL, + &odb->loose_objects_cache[subdir_nr]); + odb->loose_objects_subdir_seen[subdir_nr] = 1; strbuf_release(&buf); - return r; + return &odb->loose_objects_cache[subdir_nr]; } -int for_each_loose_object(each_loose_object_fn cb, void *data, - enum for_each_object_flags flags) +void odb_clear_loose_cache(struct object_directory *odb) { - struct loose_alt_odb_data alt; - int r; - - r = for_each_loose_file_in_objdir(get_object_directory(), - cb, NULL, NULL, data); - if (r) - return r; - - if (flags & FOR_EACH_OBJECT_LOCAL_ONLY) - return 0; + int i; - alt.cb = cb; - alt.data = data; - return foreach_alt_odb(loose_from_alt_odb, &alt); + for (i = 0; i < ARRAY_SIZE(odb->loose_objects_cache); i++) + oid_array_clear(&odb->loose_objects_cache[i]); + memset(&odb->loose_objects_subdir_seen, 0, + sizeof(odb->loose_objects_subdir_seen)); } -static int check_stream_sha1(git_zstream *stream, - const char *hdr, - unsigned long size, - const char *path, - const unsigned char *expected_sha1) +static int check_stream_oid(git_zstream *stream, + const char *hdr, + unsigned long size, + const char *path, + const struct object_id *expected_oid) { git_hash_ctx c; - unsigned char real_sha1[GIT_MAX_RAWSZ]; + struct object_id real_oid; unsigned char buf[4096]; unsigned long total_read; int status = Z_OK; @@ -2196,7 +2269,7 @@ static int check_stream_sha1(git_zstream *stream, /* * This size comparison must be "<=" to read the final zlib packets; - * see the comment in unpack_sha1_rest for details. + * see the comment in unpack_loose_rest for details. */ while (total_read <= size && (status == Z_OK || @@ -2212,19 +2285,19 @@ static int check_stream_sha1(git_zstream *stream, git_inflate_end(stream); if (status != Z_STREAM_END) { - error(_("corrupt loose object '%s'"), sha1_to_hex(expected_sha1)); + error(_("corrupt loose object '%s'"), oid_to_hex(expected_oid)); return -1; } if (stream->avail_in) { error(_("garbage at end of loose object '%s'"), - sha1_to_hex(expected_sha1)); + oid_to_hex(expected_oid)); return -1; } - the_hash_algo->final_fn(real_sha1, &c); - if (!hasheq(expected_sha1, real_sha1)) { - error(_("sha1 mismatch for %s (expected %s)"), path, - sha1_to_hex(expected_sha1)); + the_hash_algo->final_fn(real_oid.hash, &c); + if (!oideq(expected_oid, &real_oid)) { + error(_("hash mismatch for %s (expected %s)"), path, + oid_to_hex(expected_oid)); return -1; } @@ -2245,18 +2318,18 @@ int read_loose_object(const char *path, *contents = NULL; - map = map_sha1_file_1(the_repository, path, NULL, &mapsize); + map = map_loose_object_1(the_repository, path, NULL, &mapsize); if (!map) { error_errno(_("unable to mmap %s"), path); goto out; } - if (unpack_sha1_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0) { + if (unpack_loose_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0) { error(_("unable to unpack header of %s"), path); goto out; } - *type = parse_sha1_header(hdr, size); + *type = parse_loose_header(hdr, size); if (*type < 0) { error(_("unable to parse header of %s"), path); git_inflate_end(&stream); @@ -2264,10 +2337,10 @@ int read_loose_object(const char *path, } if (*type == OBJ_BLOB && *size > big_file_threshold) { - if (check_stream_sha1(&stream, hdr, *size, path, expected_oid->hash) < 0) + if (check_stream_oid(&stream, hdr, *size, path, expected_oid) < 0) goto out; } else { - *contents = unpack_sha1_rest(&stream, hdr, *size, expected_oid->hash); + *contents = unpack_loose_rest(&stream, hdr, *size, expected_oid); if (!*contents) { error(_("unable to unpack contents of %s"), path); git_inflate_end(&stream); @@ -2275,7 +2348,7 @@ int read_loose_object(const char *path, } if (check_object_signature(expected_oid, *contents, *size, type_name(*type))) { - error(_("sha1 mismatch for %s (expected %s)"), path, + error(_("hash mismatch for %s (expected %s)"), path, oid_to_hex(expected_oid)); free(*contents); goto out; |