Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 1 | /* |
| 2 | * GIT - The information manager from hell |
| 3 | * |
| 4 | * Copyright (C) Linus Torvalds, 2005 |
| 5 | * |
| 6 | * This handles basic git sha1 object files - packing, unpacking, |
| 7 | * creation etc. |
| 8 | */ |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 9 | #include "cache.h" |
Michael Haggerty | 6eac50d | 2012-11-05 09:41:22 +0100 | [diff] [blame] | 10 | #include "string-list.h" |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 11 | #include "delta.h" |
Linus Torvalds | a733cb6 | 2005-06-28 14:21:02 -0700 | [diff] [blame] | 12 | #include "pack.h" |
Peter Eriksen | 8e44025 | 2006-04-02 14:44:09 +0200 | [diff] [blame] | 13 | #include "blob.h" |
| 14 | #include "commit.h" |
Junio C Hamano | 4dd1fbc | 2011-05-08 01:47:35 -0700 | [diff] [blame] | 15 | #include "run-command.h" |
Peter Eriksen | 8e44025 | 2006-04-02 14:44:09 +0200 | [diff] [blame] | 16 | #include "tag.h" |
| 17 | #include "tree.h" |
Nguyễn Thái Ngọc Duy | c879daa | 2011-02-05 17:52:21 +0700 | [diff] [blame] | 18 | #include "tree-walk.h" |
Linus Torvalds | f35a6d3 | 2007-04-09 21:20:29 -0700 | [diff] [blame] | 19 | #include "refs.h" |
Nicolas Pitre | 70f5d5d | 2008-02-28 00:25:19 -0500 | [diff] [blame] | 20 | #include "pack-revindex.h" |
Junio C Hamano | 628522e | 2007-12-29 02:05:47 -0800 | [diff] [blame] | 21 | #include "sha1-lookup.h" |
Junio C Hamano | 568508e | 2011-10-28 14:48:40 -0700 | [diff] [blame] | 22 | #include "bulk-checkin.h" |
Nguyễn Thái Ngọc Duy | 090ea12 | 2012-03-07 17:54:18 +0700 | [diff] [blame] | 23 | #include "streaming.h" |
Nguyễn Thái Ngọc Duy | 543c5ca | 2013-02-15 19:07:10 +0700 | [diff] [blame] | 24 | #include "dir.h" |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 25 | |
Linus Torvalds | 144bde7 | 2005-04-23 11:09:32 -0700 | [diff] [blame] | 26 | #ifndef O_NOATIME |
| 27 | #if defined(__linux__) && (defined(__i386__) || defined(__PPC__)) |
| 28 | #define O_NOATIME 01000000 |
| 29 | #else |
| 30 | #define O_NOATIME 0 |
| 31 | #endif |
| 32 | #endif |
| 33 | |
Jonathan Nieder | 28bd70d | 2011-03-16 00:15:31 -0500 | [diff] [blame] | 34 | #define SZ_FMT PRIuMAX |
| 35 | static inline uintmax_t sz_fmt(size_t s) { return s; } |
Pavel Roskin | e05db0f | 2007-01-09 23:07:11 -0500 | [diff] [blame] | 36 | |
David Rientjes | 96f1e58 | 2006-08-15 10:23:48 -0700 | [diff] [blame] | 37 | const unsigned char null_sha1[20]; |
Junio C Hamano | 88cd621 | 2005-09-30 14:02:47 -0700 | [diff] [blame] | 38 | |
Nguyễn Thái Ngọc Duy | b12ca96 | 2013-06-09 12:22:48 +0700 | [diff] [blame] | 39 | static const char *no_log_pack_access = "no_log_pack_access"; |
| 40 | static const char *log_pack_access; |
| 41 | |
Nguyễn Thái Ngọc Duy | c597ba8 | 2011-02-05 21:03:01 +0700 | [diff] [blame] | 42 | /* |
| 43 | * This is meant to hold a *small* number of objects that you would |
| 44 | * want read_sha1_file() to be able to return, but yet you do not want |
| 45 | * to write them into the object store (e.g. a browse-only |
| 46 | * application). |
| 47 | */ |
| 48 | static struct cached_object { |
| 49 | unsigned char sha1[20]; |
| 50 | enum object_type type; |
| 51 | void *buf; |
| 52 | unsigned long size; |
| 53 | } *cached_objects; |
| 54 | static int cached_object_nr, cached_object_alloc; |
| 55 | |
| 56 | static struct cached_object empty_tree = { |
Jonathan Nieder | dab0d41 | 2011-02-07 02:17:27 -0600 | [diff] [blame] | 57 | EMPTY_TREE_SHA1_BIN_LITERAL, |
Nguyễn Thái Ngọc Duy | c597ba8 | 2011-02-05 21:03:01 +0700 | [diff] [blame] | 58 | OBJ_TREE, |
| 59 | "", |
| 60 | 0 |
| 61 | }; |
| 62 | |
Nguyễn Thái Ngọc Duy | c01f51c | 2012-02-01 20:48:55 +0700 | [diff] [blame] | 63 | static struct packed_git *last_found_pack; |
| 64 | |
Nguyễn Thái Ngọc Duy | c597ba8 | 2011-02-05 21:03:01 +0700 | [diff] [blame] | 65 | static struct cached_object *find_cached_object(const unsigned char *sha1) |
| 66 | { |
| 67 | int i; |
| 68 | struct cached_object *co = cached_objects; |
| 69 | |
| 70 | for (i = 0; i < cached_object_nr; i++, co++) { |
| 71 | if (!hashcmp(co->sha1, sha1)) |
| 72 | return co; |
| 73 | } |
| 74 | if (!hashcmp(sha1, empty_tree.sha1)) |
| 75 | return &empty_tree; |
| 76 | return NULL; |
| 77 | } |
| 78 | |
Junio C Hamano | 90a6464 | 2011-03-10 16:02:50 -0800 | [diff] [blame] | 79 | int mkdir_in_gitdir(const char *path) |
| 80 | { |
| 81 | if (mkdir(path, 0777)) { |
| 82 | int saved_errno = errno; |
| 83 | struct stat st; |
| 84 | struct strbuf sb = STRBUF_INIT; |
| 85 | |
| 86 | if (errno != EEXIST) |
| 87 | return -1; |
| 88 | /* |
| 89 | * Are we looking at a path in a symlinked worktree |
| 90 | * whose original repository does not yet have it? |
| 91 | * e.g. .git/rr-cache pointing at its original |
| 92 | * repository in which the user hasn't performed any |
| 93 | * conflict resolution yet? |
| 94 | */ |
| 95 | if (lstat(path, &st) || !S_ISLNK(st.st_mode) || |
| 96 | strbuf_readlink(&sb, path, st.st_size) || |
| 97 | !is_absolute_path(sb.buf) || |
| 98 | mkdir(sb.buf, 0777)) { |
| 99 | strbuf_release(&sb); |
| 100 | errno = saved_errno; |
| 101 | return -1; |
| 102 | } |
| 103 | strbuf_release(&sb); |
| 104 | } |
| 105 | return adjust_shared_perm(path); |
| 106 | } |
| 107 | |
Junio C Hamano | b2cb942 | 2005-07-06 01:11:52 -0700 | [diff] [blame] | 108 | int safe_create_leading_directories(char *path) |
| 109 | { |
Johannes Sixt | 8385abf | 2007-11-30 21:36:00 +0100 | [diff] [blame] | 110 | char *pos = path + offset_1st_component(path); |
Jason Riedy | 67d4221 | 2006-02-09 17:56:13 -0800 | [diff] [blame] | 111 | struct stat st; |
| 112 | |
Junio C Hamano | b2cb942 | 2005-07-06 01:11:52 -0700 | [diff] [blame] | 113 | while (pos) { |
| 114 | pos = strchr(pos, '/'); |
| 115 | if (!pos) |
| 116 | break; |
Junio C Hamano | 5f0bdf5 | 2008-09-02 14:10:15 -0700 | [diff] [blame] | 117 | while (*++pos == '/') |
| 118 | ; |
| 119 | if (!*pos) |
| 120 | break; |
| 121 | *--pos = '\0'; |
Jason Riedy | 67d4221 | 2006-02-09 17:56:13 -0800 | [diff] [blame] | 122 | if (!stat(path, &st)) { |
| 123 | /* path exists */ |
| 124 | if (!S_ISDIR(st.st_mode)) { |
Junio C Hamano | b2cb942 | 2005-07-06 01:11:52 -0700 | [diff] [blame] | 125 | *pos = '/'; |
Jason Riedy | 67d4221 | 2006-02-09 17:56:13 -0800 | [diff] [blame] | 126 | return -3; |
Junio C Hamano | b2cb942 | 2005-07-06 01:11:52 -0700 | [diff] [blame] | 127 | } |
Johannes Schindelin | 457f06d | 2005-12-22 23:13:56 +0100 | [diff] [blame] | 128 | } |
Jason Riedy | 67d4221 | 2006-02-09 17:56:13 -0800 | [diff] [blame] | 129 | else if (mkdir(path, 0777)) { |
Steven Walter | 928734d | 2013-03-17 10:09:27 -0400 | [diff] [blame] | 130 | if (errno == EEXIST && |
| 131 | !stat(path, &st) && S_ISDIR(st.st_mode)) { |
| 132 | ; /* somebody created it since we checked */ |
| 133 | } else { |
| 134 | *pos = '/'; |
| 135 | return -1; |
| 136 | } |
Jason Riedy | 67d4221 | 2006-02-09 17:56:13 -0800 | [diff] [blame] | 137 | } |
Johannes Schindelin | 457f06d | 2005-12-22 23:13:56 +0100 | [diff] [blame] | 138 | else if (adjust_shared_perm(path)) { |
| 139 | *pos = '/'; |
| 140 | return -2; |
| 141 | } |
Junio C Hamano | b2cb942 | 2005-07-06 01:11:52 -0700 | [diff] [blame] | 142 | *pos++ = '/'; |
| 143 | } |
| 144 | return 0; |
| 145 | } |
| 146 | |
Jeff King | 8e21d63 | 2008-06-25 01:41:34 -0400 | [diff] [blame] | 147 | int safe_create_leading_directories_const(const char *path) |
| 148 | { |
| 149 | /* path points to cache entries, so xstrdup before messing with it */ |
| 150 | char *buf = xstrdup(path); |
| 151 | int result = safe_create_leading_directories(buf); |
| 152 | free(buf); |
| 153 | return result; |
| 154 | } |
| 155 | |
Junio C Hamano | ace1534 | 2005-05-07 00:38:04 -0700 | [diff] [blame] | 156 | static void fill_sha1_path(char *pathbuf, const unsigned char *sha1) |
| 157 | { |
| 158 | int i; |
| 159 | for (i = 0; i < 20; i++) { |
| 160 | static char hex[] = "0123456789abcdef"; |
| 161 | unsigned int val = sha1[i]; |
| 162 | char *pos = pathbuf + i*2 + (i > 0); |
| 163 | *pos++ = hex[val >> 4]; |
| 164 | *pos = hex[val & 0xf]; |
| 165 | } |
| 166 | } |
| 167 | |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 168 | /* |
| 169 | * NOTE! This returns a statically allocated buffer, so you have to be |
Jim Meyering | 790296f | 2008-01-03 15:18:07 +0100 | [diff] [blame] | 170 | * careful about using it. Do an "xstrdup()" if you need to save the |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 171 | * filename. |
Junio C Hamano | ace1534 | 2005-05-07 00:38:04 -0700 | [diff] [blame] | 172 | * |
| 173 | * Also note that this returns the location for creating. Reading |
| 174 | * SHA1 file can happen from any alternate directory listed in the |
Junio C Hamano | d19938a | 2005-05-09 17:57:56 -0700 | [diff] [blame] | 175 | * DB_ENVIRONMENT environment variable if it is not found in |
Junio C Hamano | ace1534 | 2005-05-07 00:38:04 -0700 | [diff] [blame] | 176 | * the primary object database. |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 177 | */ |
| 178 | char *sha1_file_name(const unsigned char *sha1) |
| 179 | { |
Jeff King | 560fb6a | 2010-05-22 02:59:42 -0400 | [diff] [blame] | 180 | static char buf[PATH_MAX]; |
| 181 | const char *objdir; |
| 182 | int len; |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 183 | |
Jeff King | 560fb6a | 2010-05-22 02:59:42 -0400 | [diff] [blame] | 184 | objdir = get_object_directory(); |
| 185 | len = strlen(objdir); |
| 186 | |
| 187 | /* '/' + sha1(2) + '/' + sha1(38) + '\0' */ |
| 188 | if (len + 43 > PATH_MAX) |
| 189 | die("insanely long object directory %s", objdir); |
| 190 | memcpy(buf, objdir, len); |
| 191 | buf[len] = '/'; |
| 192 | buf[len+3] = '/'; |
| 193 | buf[len+42] = '\0'; |
| 194 | fill_sha1_path(buf + len + 1, sha1); |
| 195 | return buf; |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 196 | } |
| 197 | |
Heikki Orsila | 633f43e | 2008-05-24 01:43:55 +0300 | [diff] [blame] | 198 | static char *sha1_get_pack_name(const unsigned char *sha1, |
Junio C Hamano | 6eec46b | 2008-05-28 09:47:43 -0700 | [diff] [blame] | 199 | char **name, char **base, const char *which) |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 200 | { |
| 201 | static const char hex[] = "0123456789abcdef"; |
Heikki Orsila | 633f43e | 2008-05-24 01:43:55 +0300 | [diff] [blame] | 202 | char *buf; |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 203 | int i; |
| 204 | |
Heikki Orsila | 633f43e | 2008-05-24 01:43:55 +0300 | [diff] [blame] | 205 | if (!*base) { |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 206 | const char *sha1_file_directory = get_object_directory(); |
| 207 | int len = strlen(sha1_file_directory); |
Heikki Orsila | 633f43e | 2008-05-24 01:43:55 +0300 | [diff] [blame] | 208 | *base = xmalloc(len + 60); |
Junio C Hamano | 6eec46b | 2008-05-28 09:47:43 -0700 | [diff] [blame] | 209 | sprintf(*base, "%s/pack/pack-1234567890123456789012345678901234567890.%s", |
| 210 | sha1_file_directory, which); |
Heikki Orsila | 633f43e | 2008-05-24 01:43:55 +0300 | [diff] [blame] | 211 | *name = *base + len + 11; |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 212 | } |
| 213 | |
Heikki Orsila | 633f43e | 2008-05-24 01:43:55 +0300 | [diff] [blame] | 214 | buf = *name; |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 215 | |
| 216 | for (i = 0; i < 20; i++) { |
| 217 | unsigned int val = *sha1++; |
| 218 | *buf++ = hex[val >> 4]; |
| 219 | *buf++ = hex[val & 0xf]; |
| 220 | } |
Junio C Hamano | a6080a0 | 2007-06-07 00:04:01 -0700 | [diff] [blame] | 221 | |
Heikki Orsila | 633f43e | 2008-05-24 01:43:55 +0300 | [diff] [blame] | 222 | return *base; |
| 223 | } |
| 224 | |
| 225 | char *sha1_pack_name(const unsigned char *sha1) |
| 226 | { |
| 227 | static char *name, *base; |
| 228 | |
Junio C Hamano | 6eec46b | 2008-05-28 09:47:43 -0700 | [diff] [blame] | 229 | return sha1_get_pack_name(sha1, &name, &base, "pack"); |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 230 | } |
| 231 | |
| 232 | char *sha1_pack_index_name(const unsigned char *sha1) |
| 233 | { |
Heikki Orsila | 633f43e | 2008-05-24 01:43:55 +0300 | [diff] [blame] | 234 | static char *name, *base; |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 235 | |
Junio C Hamano | 6eec46b | 2008-05-28 09:47:43 -0700 | [diff] [blame] | 236 | return sha1_get_pack_name(sha1, &name, &base, "idx"); |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 237 | } |
| 238 | |
Junio C Hamano | d5a63b9 | 2005-08-14 17:25:57 -0700 | [diff] [blame] | 239 | struct alternate_object_database *alt_odb_list; |
| 240 | static struct alternate_object_database **alt_odb_tail; |
Junio C Hamano | ace1534 | 2005-05-07 00:38:04 -0700 | [diff] [blame] | 241 | |
Junio C Hamano | f4e5168 | 2011-05-15 12:16:29 -0700 | [diff] [blame] | 242 | static int git_open_noatime(const char *name); |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 243 | |
Junio C Hamano | ddd5d05 | 2005-05-08 13:51:13 -0700 | [diff] [blame] | 244 | /* |
| 245 | * Prepare alternate object database registry. |
Junio C Hamano | d5a63b9 | 2005-08-14 17:25:57 -0700 | [diff] [blame] | 246 | * |
| 247 | * The variable alt_odb_list points at the list of struct |
| 248 | * alternate_object_database. The elements on this list come from |
| 249 | * non-empty elements from colon separated ALTERNATE_DB_ENVIRONMENT |
| 250 | * environment variable, and $GIT_OBJECT_DIRECTORY/info/alternates, |
Junio C Hamano | 1494e03 | 2005-12-04 22:48:43 -0800 | [diff] [blame] | 251 | * whose contents is similar to that environment variable but can be |
| 252 | * LF separated. Its base points at a statically allocated buffer that |
Junio C Hamano | d5a63b9 | 2005-08-14 17:25:57 -0700 | [diff] [blame] | 253 | * contains "/the/directory/corresponding/to/.git/objects/...", while |
| 254 | * its name points just after the slash at the end of ".git/objects/" |
| 255 | * in the example above, and has enough space to hold 40-byte hex |
| 256 | * SHA1, an extra slash for the first level indirection, and the |
| 257 | * terminating NUL. |
Junio C Hamano | ddd5d05 | 2005-05-08 13:51:13 -0700 | [diff] [blame] | 258 | */ |
Michael Haggerty | 6eac50d | 2012-11-05 09:41:22 +0100 | [diff] [blame] | 259 | static int link_alt_odb_entry(const char *entry, const char *relative_base, int depth) |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 260 | { |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 261 | const char *objdir = get_object_directory(); |
| 262 | struct alternate_object_database *ent; |
| 263 | struct alternate_object_database *alt; |
Hui Wang | 5bdf0a8 | 2011-09-07 18:37:47 +0800 | [diff] [blame] | 264 | int pfxlen, entlen; |
| 265 | struct strbuf pathbuf = STRBUF_INIT; |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 266 | |
Johannes Sixt | 85dadc3 | 2007-11-13 21:05:00 +0100 | [diff] [blame] | 267 | if (!is_absolute_path(entry) && relative_base) { |
Hui Wang | 5bdf0a8 | 2011-09-07 18:37:47 +0800 | [diff] [blame] | 268 | strbuf_addstr(&pathbuf, real_path(relative_base)); |
| 269 | strbuf_addch(&pathbuf, '/'); |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 270 | } |
Michael Haggerty | 6eac50d | 2012-11-05 09:41:22 +0100 | [diff] [blame] | 271 | strbuf_addstr(&pathbuf, entry); |
Hui Wang | 5bdf0a8 | 2011-09-07 18:37:47 +0800 | [diff] [blame] | 272 | |
| 273 | normalize_path_copy(pathbuf.buf, pathbuf.buf); |
| 274 | |
| 275 | pfxlen = strlen(pathbuf.buf); |
| 276 | |
| 277 | /* |
| 278 | * The trailing slash after the directory name is given by |
| 279 | * this function at the end. Remove duplicates. |
| 280 | */ |
| 281 | while (pfxlen && pathbuf.buf[pfxlen-1] == '/') |
| 282 | pfxlen -= 1; |
| 283 | |
| 284 | entlen = pfxlen + 43; /* '/' + 2 hex + '/' + 38 hex + NUL */ |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 285 | ent = xmalloc(sizeof(*ent) + entlen); |
Hui Wang | 5bdf0a8 | 2011-09-07 18:37:47 +0800 | [diff] [blame] | 286 | memcpy(ent->base, pathbuf.buf, pfxlen); |
| 287 | strbuf_release(&pathbuf); |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 288 | |
| 289 | ent->name = ent->base + pfxlen + 1; |
| 290 | ent->base[pfxlen + 3] = '/'; |
| 291 | ent->base[pfxlen] = ent->base[entlen-1] = 0; |
| 292 | |
| 293 | /* Detect cases where alternate disappeared */ |
Junio C Hamano | 90b4a71 | 2008-09-09 01:27:07 -0700 | [diff] [blame] | 294 | if (!is_directory(ent->base)) { |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 295 | error("object directory %s does not exist; " |
| 296 | "check .git/objects/info/alternates.", |
| 297 | ent->base); |
| 298 | free(ent); |
| 299 | return -1; |
| 300 | } |
| 301 | |
| 302 | /* Prevent the common mistake of listing the same |
| 303 | * thing twice, or object directory itself. |
| 304 | */ |
| 305 | for (alt = alt_odb_list; alt; alt = alt->next) { |
| 306 | if (!memcmp(ent->base, alt->base, pfxlen)) { |
| 307 | free(ent); |
| 308 | return -1; |
| 309 | } |
| 310 | } |
Heiko Voigt | cb2912c | 2012-07-28 17:46:36 +0200 | [diff] [blame] | 311 | if (!strcmp(ent->base, objdir)) { |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 312 | free(ent); |
| 313 | return -1; |
| 314 | } |
| 315 | |
| 316 | /* add the alternate entry */ |
| 317 | *alt_odb_tail = ent; |
| 318 | alt_odb_tail = &(ent->next); |
| 319 | ent->next = NULL; |
| 320 | |
| 321 | /* recursively add alternates */ |
| 322 | read_info_alternates(ent->base, depth + 1); |
| 323 | |
| 324 | ent->base[pfxlen] = '/'; |
| 325 | |
| 326 | return 0; |
| 327 | } |
| 328 | |
Michael Haggerty | c595016 | 2012-11-05 09:41:23 +0100 | [diff] [blame] | 329 | static void link_alt_odb_entries(const char *alt, int len, int sep, |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 330 | const char *relative_base, int depth) |
Junio C Hamano | d5a63b9 | 2005-08-14 17:25:57 -0700 | [diff] [blame] | 331 | { |
Michael Haggerty | 6eac50d | 2012-11-05 09:41:22 +0100 | [diff] [blame] | 332 | struct string_list entries = STRING_LIST_INIT_NODUP; |
| 333 | char *alt_copy; |
| 334 | int i; |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 335 | |
| 336 | if (depth > 5) { |
| 337 | error("%s: ignoring alternate object stores, nesting too deep.", |
| 338 | relative_base); |
| 339 | return; |
| 340 | } |
Junio C Hamano | d5a63b9 | 2005-08-14 17:25:57 -0700 | [diff] [blame] | 341 | |
Michael Haggerty | c595016 | 2012-11-05 09:41:23 +0100 | [diff] [blame] | 342 | alt_copy = xmemdupz(alt, len); |
Michael Haggerty | 6eac50d | 2012-11-05 09:41:22 +0100 | [diff] [blame] | 343 | string_list_split_in_place(&entries, alt_copy, sep, -1); |
| 344 | for (i = 0; i < entries.nr; i++) { |
| 345 | const char *entry = entries.items[i].string; |
| 346 | if (entry[0] == '\0' || entry[0] == '#') |
Junio C Hamano | 9577e7e | 2005-08-16 18:22:05 -0700 | [diff] [blame] | 347 | continue; |
Michael Haggerty | 6eac50d | 2012-11-05 09:41:22 +0100 | [diff] [blame] | 348 | if (!is_absolute_path(entry) && depth) { |
| 349 | error("%s: ignoring relative alternate object store %s", |
| 350 | relative_base, entry); |
| 351 | } else { |
| 352 | link_alt_odb_entry(entry, relative_base, depth); |
Junio C Hamano | 9577e7e | 2005-08-16 18:22:05 -0700 | [diff] [blame] | 353 | } |
Junio C Hamano | 9577e7e | 2005-08-16 18:22:05 -0700 | [diff] [blame] | 354 | } |
Michael Haggerty | 6eac50d | 2012-11-05 09:41:22 +0100 | [diff] [blame] | 355 | string_list_clear(&entries, 0); |
| 356 | free(alt_copy); |
Junio C Hamano | d5a63b9 | 2005-08-14 17:25:57 -0700 | [diff] [blame] | 357 | } |
| 358 | |
Heiko Voigt | 5e73633 | 2012-05-14 18:24:45 +0200 | [diff] [blame] | 359 | void read_info_alternates(const char * relative_base, int depth) |
Junio C Hamano | ace1534 | 2005-05-07 00:38:04 -0700 | [diff] [blame] | 360 | { |
Junio C Hamano | 9577e7e | 2005-08-16 18:22:05 -0700 | [diff] [blame] | 361 | char *map; |
Shawn O. Pearce | dc49cd7 | 2007-03-06 20:44:37 -0500 | [diff] [blame] | 362 | size_t mapsz; |
Junio C Hamano | d5a63b9 | 2005-08-14 17:25:57 -0700 | [diff] [blame] | 363 | struct stat st; |
Jim Meyering | 9cb18f5 | 2007-07-03 12:40:20 +0200 | [diff] [blame] | 364 | const char alt_file_name[] = "info/alternates"; |
| 365 | /* Given that relative_base is no longer than PATH_MAX, |
| 366 | ensure that "path" has enough space to append "/", the |
| 367 | file name, "info/alternates", and a trailing NUL. */ |
| 368 | char path[PATH_MAX + 1 + sizeof alt_file_name]; |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 369 | int fd; |
Jason Riedy | c7c81b3 | 2005-08-23 13:34:07 -0700 | [diff] [blame] | 370 | |
Jim Meyering | 9cb18f5 | 2007-07-03 12:40:20 +0200 | [diff] [blame] | 371 | sprintf(path, "%s/%s", relative_base, alt_file_name); |
Junio C Hamano | f4e5168 | 2011-05-15 12:16:29 -0700 | [diff] [blame] | 372 | fd = git_open_noatime(path); |
Junio C Hamano | d5a63b9 | 2005-08-14 17:25:57 -0700 | [diff] [blame] | 373 | if (fd < 0) |
| 374 | return; |
| 375 | if (fstat(fd, &st) || (st.st_size == 0)) { |
| 376 | close(fd); |
| 377 | return; |
Junio C Hamano | ace1534 | 2005-05-07 00:38:04 -0700 | [diff] [blame] | 378 | } |
Shawn O. Pearce | dc49cd7 | 2007-03-06 20:44:37 -0500 | [diff] [blame] | 379 | mapsz = xsize_t(st.st_size); |
| 380 | map = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, fd, 0); |
Junio C Hamano | d5a63b9 | 2005-08-14 17:25:57 -0700 | [diff] [blame] | 381 | close(fd); |
Junio C Hamano | d5a63b9 | 2005-08-14 17:25:57 -0700 | [diff] [blame] | 382 | |
Michael Haggerty | c595016 | 2012-11-05 09:41:23 +0100 | [diff] [blame] | 383 | link_alt_odb_entries(map, mapsz, '\n', relative_base, depth); |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 384 | |
Shawn O. Pearce | dc49cd7 | 2007-03-06 20:44:37 -0500 | [diff] [blame] | 385 | munmap(map, mapsz); |
Junio C Hamano | ace1534 | 2005-05-07 00:38:04 -0700 | [diff] [blame] | 386 | } |
| 387 | |
Daniel Barkalow | bef70b2 | 2008-04-17 19:32:30 -0400 | [diff] [blame] | 388 | void add_to_alternates_file(const char *reference) |
| 389 | { |
| 390 | struct lock_file *lock = xcalloc(1, sizeof(struct lock_file)); |
Junio C Hamano | acd3b9e | 2008-10-17 15:44:39 -0700 | [diff] [blame] | 391 | int fd = hold_lock_file_for_append(lock, git_path("objects/info/alternates"), LOCK_DIE_ON_ERROR); |
Junio C Hamano | e6baf4a | 2011-08-22 18:05:16 -0700 | [diff] [blame] | 392 | char *alt = mkpath("%s\n", reference); |
Daniel Barkalow | bef70b2 | 2008-04-17 19:32:30 -0400 | [diff] [blame] | 393 | write_or_die(fd, alt, strlen(alt)); |
| 394 | if (commit_lock_file(lock)) |
| 395 | die("could not close alternates file"); |
| 396 | if (alt_odb_tail) |
Michael Haggerty | c595016 | 2012-11-05 09:41:23 +0100 | [diff] [blame] | 397 | link_alt_odb_entries(alt, strlen(alt), '\n', NULL, 0); |
Daniel Barkalow | bef70b2 | 2008-04-17 19:32:30 -0400 | [diff] [blame] | 398 | } |
| 399 | |
Junio C Hamano | d79796b | 2008-09-09 01:27:10 -0700 | [diff] [blame] | 400 | void foreach_alt_odb(alt_odb_fn fn, void *cb) |
| 401 | { |
| 402 | struct alternate_object_database *ent; |
| 403 | |
| 404 | prepare_alt_odb(); |
| 405 | for (ent = alt_odb_list; ent; ent = ent->next) |
| 406 | if (fn(ent, cb)) |
| 407 | return; |
| 408 | } |
| 409 | |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 410 | void prepare_alt_odb(void) |
| 411 | { |
Timo Hirvonen | 554fe20 | 2006-06-28 12:04:39 +0300 | [diff] [blame] | 412 | const char *alt; |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 413 | |
Shawn O. Pearce | 7dc24aa | 2007-05-26 01:24:40 -0400 | [diff] [blame] | 414 | if (alt_odb_tail) |
| 415 | return; |
| 416 | |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 417 | alt = getenv(ALTERNATE_DB_ENVIRONMENT); |
| 418 | if (!alt) alt = ""; |
| 419 | |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 420 | alt_odb_tail = &alt_odb_list; |
Michael Haggerty | c595016 | 2012-11-05 09:41:23 +0100 | [diff] [blame] | 421 | link_alt_odb_entries(alt, strlen(alt), PATH_SEP, NULL, 0); |
Martin Waitz | c2f493a | 2006-05-07 20:19:21 +0200 | [diff] [blame] | 422 | |
| 423 | read_info_alternates(get_object_directory(), 0); |
| 424 | } |
| 425 | |
Brandon Casey | 0f4dc14 | 2008-11-09 23:59:57 -0600 | [diff] [blame] | 426 | static int has_loose_object_local(const unsigned char *sha1) |
Junio C Hamano | ace1534 | 2005-05-07 00:38:04 -0700 | [diff] [blame] | 427 | { |
Junio C Hamano | ace1534 | 2005-05-07 00:38:04 -0700 | [diff] [blame] | 428 | char *name = sha1_file_name(sha1); |
Brandon Casey | 0f4dc14 | 2008-11-09 23:59:57 -0600 | [diff] [blame] | 429 | return !access(name, F_OK); |
| 430 | } |
Junio C Hamano | ace1534 | 2005-05-07 00:38:04 -0700 | [diff] [blame] | 431 | |
Brandon Casey | 0f4dc14 | 2008-11-09 23:59:57 -0600 | [diff] [blame] | 432 | int has_loose_object_nonlocal(const unsigned char *sha1) |
| 433 | { |
| 434 | struct alternate_object_database *alt; |
Junio C Hamano | 9a217f2 | 2005-06-28 14:56:57 -0700 | [diff] [blame] | 435 | prepare_alt_odb(); |
Junio C Hamano | d5a63b9 | 2005-08-14 17:25:57 -0700 | [diff] [blame] | 436 | for (alt = alt_odb_list; alt; alt = alt->next) { |
Brandon Casey | 0f4dc14 | 2008-11-09 23:59:57 -0600 | [diff] [blame] | 437 | fill_sha1_path(alt->name, sha1); |
Linus Torvalds | c529d75 | 2008-06-14 11:43:01 -0700 | [diff] [blame] | 438 | if (!access(alt->base, F_OK)) |
| 439 | return 1; |
Junio C Hamano | ace1534 | 2005-05-07 00:38:04 -0700 | [diff] [blame] | 440 | } |
Linus Torvalds | c529d75 | 2008-06-14 11:43:01 -0700 | [diff] [blame] | 441 | return 0; |
Junio C Hamano | ace1534 | 2005-05-07 00:38:04 -0700 | [diff] [blame] | 442 | } |
| 443 | |
Brandon Casey | 0f4dc14 | 2008-11-09 23:59:57 -0600 | [diff] [blame] | 444 | static int has_loose_object(const unsigned char *sha1) |
| 445 | { |
| 446 | return has_loose_object_local(sha1) || |
| 447 | has_loose_object_nonlocal(sha1); |
| 448 | } |
| 449 | |
Shawn O. Pearce | 60bb8b1 | 2006-12-23 02:34:28 -0500 | [diff] [blame] | 450 | static unsigned int pack_used_ctr; |
Shawn O. Pearce | a53128b | 2006-12-23 02:34:47 -0500 | [diff] [blame] | 451 | static unsigned int pack_mmap_calls; |
| 452 | static unsigned int peak_pack_open_windows; |
| 453 | static unsigned int pack_open_windows; |
Shawn O. Pearce | c793430 | 2011-02-28 12:52:39 -0800 | [diff] [blame] | 454 | static unsigned int pack_open_fds; |
| 455 | static unsigned int pack_max_fds; |
Shawn O. Pearce | a53128b | 2006-12-23 02:34:47 -0500 | [diff] [blame] | 456 | static size_t peak_pack_mapped; |
Shawn O. Pearce | 60bb8b1 | 2006-12-23 02:34:28 -0500 | [diff] [blame] | 457 | static size_t pack_mapped; |
Junio C Hamano | 9a217f2 | 2005-06-28 14:56:57 -0700 | [diff] [blame] | 458 | struct packed_git *packed_git; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 459 | |
Junio C Hamano | b79d18c | 2007-06-13 01:22:51 -0700 | [diff] [blame] | 460 | void pack_report(void) |
Shawn O. Pearce | a53128b | 2006-12-23 02:34:47 -0500 | [diff] [blame] | 461 | { |
| 462 | fprintf(stderr, |
Pavel Roskin | e05db0f | 2007-01-09 23:07:11 -0500 | [diff] [blame] | 463 | "pack_report: getpagesize() = %10" SZ_FMT "\n" |
| 464 | "pack_report: core.packedGitWindowSize = %10" SZ_FMT "\n" |
| 465 | "pack_report: core.packedGitLimit = %10" SZ_FMT "\n", |
Steffen Prohaska | 9e42d6a | 2007-11-21 21:27:19 +0100 | [diff] [blame] | 466 | sz_fmt(getpagesize()), |
| 467 | sz_fmt(packed_git_window_size), |
| 468 | sz_fmt(packed_git_limit)); |
Shawn O. Pearce | a53128b | 2006-12-23 02:34:47 -0500 | [diff] [blame] | 469 | fprintf(stderr, |
| 470 | "pack_report: pack_used_ctr = %10u\n" |
| 471 | "pack_report: pack_mmap_calls = %10u\n" |
| 472 | "pack_report: pack_open_windows = %10u / %10u\n" |
Pavel Roskin | e05db0f | 2007-01-09 23:07:11 -0500 | [diff] [blame] | 473 | "pack_report: pack_mapped = " |
| 474 | "%10" SZ_FMT " / %10" SZ_FMT "\n", |
Shawn O. Pearce | a53128b | 2006-12-23 02:34:47 -0500 | [diff] [blame] | 475 | pack_used_ctr, |
| 476 | pack_mmap_calls, |
| 477 | pack_open_windows, peak_pack_open_windows, |
Steffen Prohaska | 9e42d6a | 2007-11-21 21:27:19 +0100 | [diff] [blame] | 478 | sz_fmt(pack_mapped), sz_fmt(peak_pack_mapped)); |
Shawn O. Pearce | a53128b | 2006-12-23 02:34:47 -0500 | [diff] [blame] | 479 | } |
| 480 | |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 481 | static int check_packed_git_idx(const char *path, struct packed_git *p) |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 482 | { |
| 483 | void *idx_map; |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 484 | struct pack_idx_header *hdr; |
Shawn O. Pearce | dc49cd7 | 2007-03-06 20:44:37 -0500 | [diff] [blame] | 485 | size_t idx_size; |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 486 | uint32_t version, nr, i, *index; |
Junio C Hamano | f4e5168 | 2011-05-15 12:16:29 -0700 | [diff] [blame] | 487 | int fd = git_open_noatime(path); |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 488 | struct stat st; |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 489 | |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 490 | if (fd < 0) |
| 491 | return -1; |
| 492 | if (fstat(fd, &st)) { |
| 493 | close(fd); |
| 494 | return -1; |
| 495 | } |
Shawn O. Pearce | dc49cd7 | 2007-03-06 20:44:37 -0500 | [diff] [blame] | 496 | idx_size = xsize_t(st.st_size); |
Shawn O. Pearce | 2d88451 | 2007-03-06 20:44:11 -0500 | [diff] [blame] | 497 | if (idx_size < 4 * 256 + 20 + 20) { |
| 498 | close(fd); |
| 499 | return error("index file %s is too small", path); |
| 500 | } |
Shawn O. Pearce | c4712e4 | 2006-12-24 00:47:23 -0500 | [diff] [blame] | 501 | idx_map = xmmap(NULL, idx_size, PROT_READ, MAP_PRIVATE, fd, 0); |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 502 | close(fd); |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 503 | |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 504 | hdr = idx_map; |
| 505 | if (hdr->idx_signature == htonl(PACK_IDX_SIGNATURE)) { |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 506 | version = ntohl(hdr->idx_version); |
| 507 | if (version < 2 || version > 2) { |
| 508 | munmap(idx_map, idx_size); |
Ramsay Jones | 6e1c234 | 2008-07-03 16:52:09 +0100 | [diff] [blame] | 509 | return error("index file %s is version %"PRIu32 |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 510 | " and is not supported by this binary" |
| 511 | " (try upgrading GIT to a newer version)", |
| 512 | path, version); |
| 513 | } |
| 514 | } else |
| 515 | version = 1; |
Shawn O. Pearce | df1b059 | 2007-01-17 20:43:57 -0500 | [diff] [blame] | 516 | |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 517 | nr = 0; |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 518 | index = idx_map; |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 519 | if (version > 1) |
| 520 | index += 2; /* skip index header */ |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 521 | for (i = 0; i < 256; i++) { |
Shawn O. Pearce | 326bf39 | 2007-03-06 20:44:19 -0500 | [diff] [blame] | 522 | uint32_t n = ntohl(index[i]); |
Shawn O. Pearce | 2d88451 | 2007-03-06 20:44:11 -0500 | [diff] [blame] | 523 | if (n < nr) { |
| 524 | munmap(idx_map, idx_size); |
Shawn O. Pearce | df1b059 | 2007-01-17 20:43:57 -0500 | [diff] [blame] | 525 | return error("non-monotonic index %s", path); |
Shawn O. Pearce | 2d88451 | 2007-03-06 20:44:11 -0500 | [diff] [blame] | 526 | } |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 527 | nr = n; |
| 528 | } |
| 529 | |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 530 | if (version == 1) { |
| 531 | /* |
| 532 | * Total size: |
| 533 | * - 256 index entries 4 bytes each |
| 534 | * - 24-byte entries * nr (20-byte sha1 + 4-byte offset) |
| 535 | * - 20-byte SHA1 of the packfile |
| 536 | * - 20-byte SHA1 file checksum |
| 537 | */ |
| 538 | if (idx_size != 4*256 + nr * 24 + 20 + 20) { |
| 539 | munmap(idx_map, idx_size); |
Luiz Fernando N. Capitulino | eef427a | 2007-08-14 16:42:37 -0300 | [diff] [blame] | 540 | return error("wrong index v1 file size in %s", path); |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 541 | } |
| 542 | } else if (version == 2) { |
| 543 | /* |
| 544 | * Minimum size: |
| 545 | * - 8 bytes of header |
| 546 | * - 256 index entries 4 bytes each |
| 547 | * - 20-byte sha1 entry * nr |
| 548 | * - 4-byte crc entry * nr |
| 549 | * - 4-byte offset entry * nr |
| 550 | * - 20-byte SHA1 of the packfile |
| 551 | * - 20-byte SHA1 file checksum |
| 552 | * And after the 4-byte offset table might be a |
| 553 | * variable sized table containing 8-byte entries |
| 554 | * for offsets larger than 2^31. |
| 555 | */ |
| 556 | unsigned long min_size = 8 + 4*256 + nr*(20 + 4 + 4) + 20 + 20; |
Linus Torvalds | 1164f1e | 2007-06-26 14:34:02 -0700 | [diff] [blame] | 557 | unsigned long max_size = min_size; |
| 558 | if (nr) |
| 559 | max_size += (nr - 1)*8; |
| 560 | if (idx_size < min_size || idx_size > max_size) { |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 561 | munmap(idx_map, idx_size); |
Luiz Fernando N. Capitulino | eef427a | 2007-08-14 16:42:37 -0300 | [diff] [blame] | 562 | return error("wrong index v2 file size in %s", path); |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 563 | } |
Junio C Hamano | 7109c88 | 2007-10-29 11:53:55 -0700 | [diff] [blame] | 564 | if (idx_size != min_size && |
| 565 | /* |
| 566 | * make sure we can deal with large pack offsets. |
| 567 | * 31-bit signed offset won't be enough, neither |
| 568 | * 32-bit unsigned one will be. |
| 569 | */ |
| 570 | (sizeof(off_t) <= 4)) { |
| 571 | munmap(idx_map, idx_size); |
| 572 | return error("pack too large for current definition of off_t in %s", path); |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 573 | } |
Shawn O. Pearce | 2d88451 | 2007-03-06 20:44:11 -0500 | [diff] [blame] | 574 | } |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 575 | |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 576 | p->index_version = version; |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 577 | p->index_data = idx_map; |
| 578 | p->index_size = idx_size; |
Nicolas Pitre | 5705909 | 2007-04-09 01:06:28 -0400 | [diff] [blame] | 579 | p->num_objects = nr; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 580 | return 0; |
| 581 | } |
| 582 | |
Shawn O. Pearce | bc8e478 | 2007-05-30 02:13:42 -0400 | [diff] [blame] | 583 | int open_pack_index(struct packed_git *p) |
Shawn O. Pearce | d079837 | 2007-05-26 01:24:19 -0400 | [diff] [blame] | 584 | { |
| 585 | char *idx_name; |
| 586 | int ret; |
| 587 | |
| 588 | if (p->index_data) |
| 589 | return 0; |
| 590 | |
| 591 | idx_name = xstrdup(p->pack_name); |
| 592 | strcpy(idx_name + strlen(idx_name) - strlen(".pack"), ".idx"); |
| 593 | ret = check_packed_git_idx(idx_name, p); |
| 594 | free(idx_name); |
| 595 | return ret; |
| 596 | } |
| 597 | |
Shawn O. Pearce | 11daf39 | 2006-12-23 02:34:44 -0500 | [diff] [blame] | 598 | static void scan_windows(struct packed_git *p, |
| 599 | struct packed_git **lru_p, |
| 600 | struct pack_window **lru_w, |
| 601 | struct pack_window **lru_l) |
| 602 | { |
| 603 | struct pack_window *w, *w_l; |
| 604 | |
| 605 | for (w_l = NULL, w = p->windows; w; w = w->next) { |
| 606 | if (!w->inuse_cnt) { |
| 607 | if (!*lru_w || w->last_used < (*lru_w)->last_used) { |
| 608 | *lru_p = p; |
| 609 | *lru_w = w; |
| 610 | *lru_l = w_l; |
| 611 | } |
| 612 | } |
| 613 | w_l = w; |
| 614 | } |
| 615 | } |
| 616 | |
Shawn O. Pearce | d1efefa | 2007-04-25 04:02:27 -0400 | [diff] [blame] | 617 | static int unuse_one_window(struct packed_git *current, int keep_fd) |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 618 | { |
Shawn O. Pearce | 54044bf | 2006-12-23 02:34:23 -0500 | [diff] [blame] | 619 | struct packed_git *p, *lru_p = NULL; |
Shawn O. Pearce | 11daf39 | 2006-12-23 02:34:44 -0500 | [diff] [blame] | 620 | struct pack_window *lru_w = NULL, *lru_l = NULL; |
Junio C Hamano | f925339 | 2005-06-29 02:51:27 -0700 | [diff] [blame] | 621 | |
Shawn O. Pearce | 11daf39 | 2006-12-23 02:34:44 -0500 | [diff] [blame] | 622 | if (current) |
| 623 | scan_windows(current, &lru_p, &lru_w, &lru_l); |
| 624 | for (p = packed_git; p; p = p->next) |
| 625 | scan_windows(p, &lru_p, &lru_w, &lru_l); |
Shawn O. Pearce | 54044bf | 2006-12-23 02:34:23 -0500 | [diff] [blame] | 626 | if (lru_p) { |
| 627 | munmap(lru_w->base, lru_w->len); |
| 628 | pack_mapped -= lru_w->len; |
| 629 | if (lru_l) |
| 630 | lru_l->next = lru_w->next; |
| 631 | else { |
| 632 | lru_p->windows = lru_w->next; |
Shawn O. Pearce | d131b7a | 2011-03-02 10:01:54 -0800 | [diff] [blame] | 633 | if (!lru_p->windows && lru_p->pack_fd != -1 |
| 634 | && lru_p->pack_fd != keep_fd) { |
Shawn O. Pearce | 54044bf | 2006-12-23 02:34:23 -0500 | [diff] [blame] | 635 | close(lru_p->pack_fd); |
Shawn O. Pearce | c793430 | 2011-02-28 12:52:39 -0800 | [diff] [blame] | 636 | pack_open_fds--; |
Shawn O. Pearce | 54044bf | 2006-12-23 02:34:23 -0500 | [diff] [blame] | 637 | lru_p->pack_fd = -1; |
| 638 | } |
| 639 | } |
| 640 | free(lru_w); |
Shawn O. Pearce | a53128b | 2006-12-23 02:34:47 -0500 | [diff] [blame] | 641 | pack_open_windows--; |
Shawn O. Pearce | 54044bf | 2006-12-23 02:34:23 -0500 | [diff] [blame] | 642 | return 1; |
| 643 | } |
| 644 | return 0; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 645 | } |
| 646 | |
Shawn O. Pearce | d1efefa | 2007-04-25 04:02:27 -0400 | [diff] [blame] | 647 | void release_pack_memory(size_t need, int fd) |
Shawn O. Pearce | 97bfeb3 | 2006-12-24 00:47:19 -0500 | [diff] [blame] | 648 | { |
| 649 | size_t cur = pack_mapped; |
Shawn O. Pearce | d1efefa | 2007-04-25 04:02:27 -0400 | [diff] [blame] | 650 | while (need >= (cur - pack_mapped) && unuse_one_window(NULL, fd)) |
Shawn O. Pearce | 97bfeb3 | 2006-12-24 00:47:19 -0500 | [diff] [blame] | 651 | ; /* nothing */ |
| 652 | } |
| 653 | |
Jonathan Nieder | 58ecbd5 | 2010-11-06 06:44:11 -0500 | [diff] [blame] | 654 | void *xmmap(void *start, size_t length, |
| 655 | int prot, int flags, int fd, off_t offset) |
| 656 | { |
| 657 | void *ret = mmap(start, length, prot, flags, fd, offset); |
| 658 | if (ret == MAP_FAILED) { |
| 659 | if (!length) |
| 660 | return NULL; |
| 661 | release_pack_memory(length, fd); |
| 662 | ret = mmap(start, length, prot, flags, fd, offset); |
| 663 | if (ret == MAP_FAILED) |
| 664 | die_errno("Out of memory? mmap failed"); |
| 665 | } |
| 666 | return ret; |
| 667 | } |
| 668 | |
Shawn O. Pearce | c9ced05 | 2008-01-17 22:57:00 -0500 | [diff] [blame] | 669 | void close_pack_windows(struct packed_git *p) |
| 670 | { |
| 671 | while (p->windows) { |
| 672 | struct pack_window *w = p->windows; |
| 673 | |
| 674 | if (w->inuse_cnt) |
| 675 | die("pack '%s' still has open windows to it", |
| 676 | p->pack_name); |
| 677 | munmap(w->base, w->len); |
| 678 | pack_mapped -= w->len; |
| 679 | pack_open_windows--; |
| 680 | p->windows = w->next; |
| 681 | free(w); |
| 682 | } |
| 683 | } |
| 684 | |
Shawn O. Pearce | 03e79c8 | 2006-12-23 02:34:08 -0500 | [diff] [blame] | 685 | void unuse_pack(struct pack_window **w_cursor) |
Junio C Hamano | f925339 | 2005-06-29 02:51:27 -0700 | [diff] [blame] | 686 | { |
Shawn O. Pearce | 03e79c8 | 2006-12-23 02:34:08 -0500 | [diff] [blame] | 687 | struct pack_window *w = *w_cursor; |
| 688 | if (w) { |
| 689 | w->inuse_cnt--; |
| 690 | *w_cursor = NULL; |
| 691 | } |
Junio C Hamano | f925339 | 2005-06-29 02:51:27 -0700 | [diff] [blame] | 692 | } |
| 693 | |
Shawn O. Pearce | fa5fc15 | 2010-04-19 07:23:06 -0700 | [diff] [blame] | 694 | void close_pack_index(struct packed_git *p) |
| 695 | { |
| 696 | if (p->index_data) { |
| 697 | munmap((void *)p->index_data, p->index_size); |
| 698 | p->index_data = NULL; |
| 699 | } |
| 700 | } |
| 701 | |
Shawn O. Pearce | 3cf8b46 | 2007-02-02 03:00:03 -0500 | [diff] [blame] | 702 | /* |
Nicolas Pitre | c74faea | 2008-12-09 14:26:52 -0500 | [diff] [blame] | 703 | * This is used by git-repack in case a newly created pack happens to |
| 704 | * contain the same set of objects as an existing one. In that case |
| 705 | * the resulting file might be different even if its name would be the |
| 706 | * same. It is best to close any reference to the old pack before it is |
| 707 | * replaced on disk. Of course no index pointers nor windows for given pack |
| 708 | * must subsist at this point. If ever objects from this pack are requested |
| 709 | * again, the new version of the pack will be reinitialized through |
| 710 | * reprepare_packed_git(). |
| 711 | */ |
| 712 | void free_pack_by_name(const char *pack_name) |
| 713 | { |
| 714 | struct packed_git *p, **pp = &packed_git; |
| 715 | |
| 716 | while (*pp) { |
| 717 | p = *pp; |
| 718 | if (strcmp(pack_name, p->pack_name) == 0) { |
Shawn O. Pearce | fa3a0c9 | 2009-02-11 10:15:30 -0800 | [diff] [blame] | 719 | clear_delta_base_cache(); |
Nicolas Pitre | c74faea | 2008-12-09 14:26:52 -0500 | [diff] [blame] | 720 | close_pack_windows(p); |
Shawn O. Pearce | c793430 | 2011-02-28 12:52:39 -0800 | [diff] [blame] | 721 | if (p->pack_fd != -1) { |
Nicolas Pitre | c74faea | 2008-12-09 14:26:52 -0500 | [diff] [blame] | 722 | close(p->pack_fd); |
Shawn O. Pearce | c793430 | 2011-02-28 12:52:39 -0800 | [diff] [blame] | 723 | pack_open_fds--; |
| 724 | } |
Shawn O. Pearce | fa5fc15 | 2010-04-19 07:23:06 -0700 | [diff] [blame] | 725 | close_pack_index(p); |
Nicolas Pitre | c74faea | 2008-12-09 14:26:52 -0500 | [diff] [blame] | 726 | free(p->bad_object_sha1); |
| 727 | *pp = p->next; |
Nguyễn Thái Ngọc Duy | c01f51c | 2012-02-01 20:48:55 +0700 | [diff] [blame] | 728 | if (last_found_pack == p) |
| 729 | last_found_pack = NULL; |
Nicolas Pitre | c74faea | 2008-12-09 14:26:52 -0500 | [diff] [blame] | 730 | free(p); |
| 731 | return; |
| 732 | } |
| 733 | pp = &p->next; |
| 734 | } |
| 735 | } |
| 736 | |
Joachim Schmitz | a078826 | 2012-08-24 11:52:22 +0200 | [diff] [blame] | 737 | static unsigned int get_max_fd_limit(void) |
| 738 | { |
| 739 | #ifdef RLIMIT_NOFILE |
| 740 | struct rlimit lim; |
| 741 | |
| 742 | if (getrlimit(RLIMIT_NOFILE, &lim)) |
| 743 | die_errno("cannot get RLIMIT_NOFILE"); |
| 744 | |
| 745 | return lim.rlim_cur; |
| 746 | #elif defined(_SC_OPEN_MAX) |
| 747 | return sysconf(_SC_OPEN_MAX); |
| 748 | #elif defined(OPEN_MAX) |
| 749 | return OPEN_MAX; |
| 750 | #else |
| 751 | return 1; /* see the caller ;-) */ |
| 752 | #endif |
| 753 | } |
| 754 | |
Nicolas Pitre | c74faea | 2008-12-09 14:26:52 -0500 | [diff] [blame] | 755 | /* |
Shawn O. Pearce | 3cf8b46 | 2007-02-02 03:00:03 -0500 | [diff] [blame] | 756 | * Do not call this directly as this leaks p->pack_fd on error return; |
| 757 | * call open_packed_git() instead. |
| 758 | */ |
| 759 | static int open_packed_git_1(struct packed_git *p) |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 760 | { |
Shawn O. Pearce | 9bc879c | 2006-12-23 02:34:01 -0500 | [diff] [blame] | 761 | struct stat st; |
| 762 | struct pack_header hdr; |
| 763 | unsigned char sha1[20]; |
| 764 | unsigned char *idx_sha1; |
Junio C Hamano | 2c039da | 2006-12-29 00:30:01 -0800 | [diff] [blame] | 765 | long fd_flag; |
Shawn O. Pearce | 9bc879c | 2006-12-23 02:34:01 -0500 | [diff] [blame] | 766 | |
Shawn O. Pearce | d079837 | 2007-05-26 01:24:19 -0400 | [diff] [blame] | 767 | if (!p->index_data && open_pack_index(p)) |
| 768 | return error("packfile %s index unavailable", p->pack_name); |
| 769 | |
Shawn O. Pearce | c793430 | 2011-02-28 12:52:39 -0800 | [diff] [blame] | 770 | if (!pack_max_fds) { |
Joachim Schmitz | a078826 | 2012-08-24 11:52:22 +0200 | [diff] [blame] | 771 | unsigned int max_fds = get_max_fd_limit(); |
Shawn O. Pearce | c793430 | 2011-02-28 12:52:39 -0800 | [diff] [blame] | 772 | |
| 773 | /* Save 3 for stdin/stdout/stderr, 22 for work */ |
| 774 | if (25 < max_fds) |
| 775 | pack_max_fds = max_fds - 25; |
| 776 | else |
| 777 | pack_max_fds = 1; |
| 778 | } |
| 779 | |
| 780 | while (pack_max_fds <= pack_open_fds && unuse_one_window(NULL, -1)) |
| 781 | ; /* nothing */ |
| 782 | |
Junio C Hamano | f4e5168 | 2011-05-15 12:16:29 -0700 | [diff] [blame] | 783 | p->pack_fd = git_open_noatime(p->pack_name); |
Shawn O. Pearce | 9bc879c | 2006-12-23 02:34:01 -0500 | [diff] [blame] | 784 | if (p->pack_fd < 0 || fstat(p->pack_fd, &st)) |
Shawn O. Pearce | 072db27 | 2007-02-01 15:52:33 -0500 | [diff] [blame] | 785 | return -1; |
Shawn O. Pearce | c793430 | 2011-02-28 12:52:39 -0800 | [diff] [blame] | 786 | pack_open_fds++; |
Shawn O. Pearce | 9bc879c | 2006-12-23 02:34:01 -0500 | [diff] [blame] | 787 | |
| 788 | /* If we created the struct before we had the pack we lack size. */ |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 789 | if (!p->pack_size) { |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 790 | if (!S_ISREG(st.st_mode)) |
Shawn O. Pearce | 072db27 | 2007-02-01 15:52:33 -0500 | [diff] [blame] | 791 | return error("packfile %s not a regular file", p->pack_name); |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 792 | p->pack_size = st.st_size; |
Shawn O. Pearce | 9bc879c | 2006-12-23 02:34:01 -0500 | [diff] [blame] | 793 | } else if (p->pack_size != st.st_size) |
Shawn O. Pearce | 072db27 | 2007-02-01 15:52:33 -0500 | [diff] [blame] | 794 | return error("packfile %s size changed", p->pack_name); |
Shawn O. Pearce | 9bc879c | 2006-12-23 02:34:01 -0500 | [diff] [blame] | 795 | |
Junio C Hamano | 2c039da | 2006-12-29 00:30:01 -0800 | [diff] [blame] | 796 | /* We leave these file descriptors open with sliding mmap; |
| 797 | * there is no point keeping them open across exec(), though. |
| 798 | */ |
| 799 | fd_flag = fcntl(p->pack_fd, F_GETFD, 0); |
| 800 | if (fd_flag < 0) |
Shawn O. Pearce | 072db27 | 2007-02-01 15:52:33 -0500 | [diff] [blame] | 801 | return error("cannot determine file descriptor flags"); |
Junio C Hamano | 2c039da | 2006-12-29 00:30:01 -0800 | [diff] [blame] | 802 | fd_flag |= FD_CLOEXEC; |
| 803 | if (fcntl(p->pack_fd, F_SETFD, fd_flag) == -1) |
Shawn O. Pearce | 072db27 | 2007-02-01 15:52:33 -0500 | [diff] [blame] | 804 | return error("cannot set FD_CLOEXEC"); |
Junio C Hamano | 2c039da | 2006-12-29 00:30:01 -0800 | [diff] [blame] | 805 | |
Shawn O. Pearce | 9bc879c | 2006-12-23 02:34:01 -0500 | [diff] [blame] | 806 | /* Verify we recognize this pack file format. */ |
Shawn O. Pearce | e6e2bd6 | 2007-01-14 01:01:49 -0500 | [diff] [blame] | 807 | if (read_in_full(p->pack_fd, &hdr, sizeof(hdr)) != sizeof(hdr)) |
Shawn O. Pearce | 072db27 | 2007-02-01 15:52:33 -0500 | [diff] [blame] | 808 | return error("file %s is far too short to be a packfile", p->pack_name); |
Shawn O. Pearce | 9bc879c | 2006-12-23 02:34:01 -0500 | [diff] [blame] | 809 | if (hdr.hdr_signature != htonl(PACK_SIGNATURE)) |
Shawn O. Pearce | 072db27 | 2007-02-01 15:52:33 -0500 | [diff] [blame] | 810 | return error("file %s is not a GIT packfile", p->pack_name); |
Shawn O. Pearce | 9bc879c | 2006-12-23 02:34:01 -0500 | [diff] [blame] | 811 | if (!pack_version_ok(hdr.hdr_version)) |
Ramsay Jones | 6e1c234 | 2008-07-03 16:52:09 +0100 | [diff] [blame] | 812 | return error("packfile %s is version %"PRIu32" and not" |
| 813 | " supported (try upgrading GIT to a newer version)", |
Shawn O. Pearce | 9bc879c | 2006-12-23 02:34:01 -0500 | [diff] [blame] | 814 | p->pack_name, ntohl(hdr.hdr_version)); |
| 815 | |
| 816 | /* Verify the pack matches its index. */ |
Nicolas Pitre | 5705909 | 2007-04-09 01:06:28 -0400 | [diff] [blame] | 817 | if (p->num_objects != ntohl(hdr.hdr_entries)) |
Ramsay Jones | 6e1c234 | 2008-07-03 16:52:09 +0100 | [diff] [blame] | 818 | return error("packfile %s claims to have %"PRIu32" objects" |
| 819 | " while index indicates %"PRIu32" objects", |
Nicolas Pitre | 5705909 | 2007-04-09 01:06:28 -0400 | [diff] [blame] | 820 | p->pack_name, ntohl(hdr.hdr_entries), |
| 821 | p->num_objects); |
Shawn O. Pearce | 9bc879c | 2006-12-23 02:34:01 -0500 | [diff] [blame] | 822 | if (lseek(p->pack_fd, p->pack_size - sizeof(sha1), SEEK_SET) == -1) |
Shawn O. Pearce | 072db27 | 2007-02-01 15:52:33 -0500 | [diff] [blame] | 823 | return error("end of packfile %s is unavailable", p->pack_name); |
Shawn O. Pearce | e6e2bd6 | 2007-01-14 01:01:49 -0500 | [diff] [blame] | 824 | if (read_in_full(p->pack_fd, sha1, sizeof(sha1)) != sizeof(sha1)) |
Shawn O. Pearce | 072db27 | 2007-02-01 15:52:33 -0500 | [diff] [blame] | 825 | return error("packfile %s signature is unavailable", p->pack_name); |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 826 | idx_sha1 = ((unsigned char *)p->index_data) + p->index_size - 40; |
Shawn O. Pearce | 9bc879c | 2006-12-23 02:34:01 -0500 | [diff] [blame] | 827 | if (hashcmp(sha1, idx_sha1)) |
Shawn O. Pearce | 072db27 | 2007-02-01 15:52:33 -0500 | [diff] [blame] | 828 | return error("packfile %s does not match index", p->pack_name); |
| 829 | return 0; |
Shawn O. Pearce | 9bc879c | 2006-12-23 02:34:01 -0500 | [diff] [blame] | 830 | } |
| 831 | |
Shawn O. Pearce | 3cf8b46 | 2007-02-02 03:00:03 -0500 | [diff] [blame] | 832 | static int open_packed_git(struct packed_git *p) |
| 833 | { |
| 834 | if (!open_packed_git_1(p)) |
| 835 | return 0; |
| 836 | if (p->pack_fd != -1) { |
| 837 | close(p->pack_fd); |
Shawn O. Pearce | c793430 | 2011-02-28 12:52:39 -0800 | [diff] [blame] | 838 | pack_open_fds--; |
Shawn O. Pearce | 3cf8b46 | 2007-02-02 03:00:03 -0500 | [diff] [blame] | 839 | p->pack_fd = -1; |
| 840 | } |
| 841 | return -1; |
| 842 | } |
| 843 | |
Shawn O. Pearce | c4001d9 | 2007-03-06 20:44:30 -0500 | [diff] [blame] | 844 | static int in_window(struct pack_window *win, off_t offset) |
Shawn O. Pearce | 60bb8b1 | 2006-12-23 02:34:28 -0500 | [diff] [blame] | 845 | { |
| 846 | /* We must promise at least 20 bytes (one hash) after the |
| 847 | * offset is available from this window, otherwise the offset |
| 848 | * is not actually in this window and a different window (which |
| 849 | * has that one hash excess) must be used. This is to support |
| 850 | * the object header and delta base parsing routines below. |
| 851 | */ |
| 852 | off_t win_off = win->offset; |
| 853 | return win_off <= offset |
| 854 | && (offset + 20) <= (win_off + win->len); |
| 855 | } |
| 856 | |
Felipe Contreras | 4b25d09 | 2009-05-01 12:06:36 +0300 | [diff] [blame] | 857 | unsigned char *use_pack(struct packed_git *p, |
Shawn O. Pearce | 03e79c8 | 2006-12-23 02:34:08 -0500 | [diff] [blame] | 858 | struct pack_window **w_cursor, |
Shawn O. Pearce | c4001d9 | 2007-03-06 20:44:30 -0500 | [diff] [blame] | 859 | off_t offset, |
Junio C Hamano | ef49a7a | 2011-06-10 11:52:15 -0700 | [diff] [blame] | 860 | unsigned long *left) |
Shawn O. Pearce | 9bc879c | 2006-12-23 02:34:01 -0500 | [diff] [blame] | 861 | { |
Shawn O. Pearce | 60bb8b1 | 2006-12-23 02:34:28 -0500 | [diff] [blame] | 862 | struct pack_window *win = *w_cursor; |
Shawn O. Pearce | 03e79c8 | 2006-12-23 02:34:08 -0500 | [diff] [blame] | 863 | |
Felipe Contreras | a9d98a1 | 2009-02-24 23:59:05 +0200 | [diff] [blame] | 864 | /* Since packfiles end in a hash of their content and it's |
Shawn O. Pearce | 60bb8b1 | 2006-12-23 02:34:28 -0500 | [diff] [blame] | 865 | * pointless to ask for an offset into the middle of that |
| 866 | * hash, and the in_window function above wouldn't match |
| 867 | * don't allow an offset too close to the end of the file. |
| 868 | */ |
Shawn O. Pearce | d131b7a | 2011-03-02 10:01:54 -0800 | [diff] [blame] | 869 | if (!p->pack_size && p->pack_fd == -1 && open_packed_git(p)) |
| 870 | die("packfile %s cannot be accessed", p->pack_name); |
Shawn O. Pearce | 60bb8b1 | 2006-12-23 02:34:28 -0500 | [diff] [blame] | 871 | if (offset > (p->pack_size - 20)) |
| 872 | die("offset beyond end of packfile (truncated pack?)"); |
| 873 | |
| 874 | if (!win || !in_window(win, offset)) { |
| 875 | if (win) |
| 876 | win->inuse_cnt--; |
| 877 | for (win = p->windows; win; win = win->next) { |
| 878 | if (in_window(win, offset)) |
| 879 | break; |
| 880 | } |
| 881 | if (!win) { |
Alexandre Julliard | 78a28df | 2007-02-14 18:11:40 +0100 | [diff] [blame] | 882 | size_t window_align = packed_git_window_size / 2; |
Shawn O. Pearce | dc49cd7 | 2007-03-06 20:44:37 -0500 | [diff] [blame] | 883 | off_t len; |
Shawn O. Pearce | d131b7a | 2011-03-02 10:01:54 -0800 | [diff] [blame] | 884 | |
| 885 | if (p->pack_fd == -1 && open_packed_git(p)) |
| 886 | die("packfile %s cannot be accessed", p->pack_name); |
| 887 | |
Shawn O. Pearce | 60bb8b1 | 2006-12-23 02:34:28 -0500 | [diff] [blame] | 888 | win = xcalloc(1, sizeof(*win)); |
Alexandre Julliard | 78a28df | 2007-02-14 18:11:40 +0100 | [diff] [blame] | 889 | win->offset = (offset / window_align) * window_align; |
Shawn O. Pearce | dc49cd7 | 2007-03-06 20:44:37 -0500 | [diff] [blame] | 890 | len = p->pack_size - win->offset; |
| 891 | if (len > packed_git_window_size) |
| 892 | len = packed_git_window_size; |
| 893 | win->len = (size_t)len; |
Shawn O. Pearce | 60bb8b1 | 2006-12-23 02:34:28 -0500 | [diff] [blame] | 894 | pack_mapped += win->len; |
Shawn O. Pearce | 11daf39 | 2006-12-23 02:34:44 -0500 | [diff] [blame] | 895 | while (packed_git_limit < pack_mapped |
Shawn O. Pearce | d1efefa | 2007-04-25 04:02:27 -0400 | [diff] [blame] | 896 | && unuse_one_window(p, p->pack_fd)) |
Shawn O. Pearce | 60bb8b1 | 2006-12-23 02:34:28 -0500 | [diff] [blame] | 897 | ; /* nothing */ |
Shawn O. Pearce | c4712e4 | 2006-12-24 00:47:23 -0500 | [diff] [blame] | 898 | win->base = xmmap(NULL, win->len, |
Shawn O. Pearce | 60bb8b1 | 2006-12-23 02:34:28 -0500 | [diff] [blame] | 899 | PROT_READ, MAP_PRIVATE, |
| 900 | p->pack_fd, win->offset); |
| 901 | if (win->base == MAP_FAILED) |
Shawn O. Pearce | 73b4e4b | 2006-12-23 02:34:41 -0500 | [diff] [blame] | 902 | die("packfile %s cannot be mapped: %s", |
| 903 | p->pack_name, |
| 904 | strerror(errno)); |
Shawn O. Pearce | d131b7a | 2011-03-02 10:01:54 -0800 | [diff] [blame] | 905 | if (!win->offset && win->len == p->pack_size |
| 906 | && !p->do_not_close) { |
| 907 | close(p->pack_fd); |
| 908 | pack_open_fds--; |
| 909 | p->pack_fd = -1; |
| 910 | } |
Shawn O. Pearce | a53128b | 2006-12-23 02:34:47 -0500 | [diff] [blame] | 911 | pack_mmap_calls++; |
| 912 | pack_open_windows++; |
| 913 | if (pack_mapped > peak_pack_mapped) |
| 914 | peak_pack_mapped = pack_mapped; |
| 915 | if (pack_open_windows > peak_pack_open_windows) |
| 916 | peak_pack_open_windows = pack_open_windows; |
Shawn O. Pearce | 60bb8b1 | 2006-12-23 02:34:28 -0500 | [diff] [blame] | 917 | win->next = p->windows; |
| 918 | p->windows = win; |
| 919 | } |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 920 | } |
Shawn O. Pearce | 03e79c8 | 2006-12-23 02:34:08 -0500 | [diff] [blame] | 921 | if (win != *w_cursor) { |
| 922 | win->last_used = pack_used_ctr++; |
| 923 | win->inuse_cnt++; |
| 924 | *w_cursor = win; |
| 925 | } |
Shawn O. Pearce | 60bb8b1 | 2006-12-23 02:34:28 -0500 | [diff] [blame] | 926 | offset -= win->offset; |
Shawn O. Pearce | 03e79c8 | 2006-12-23 02:34:08 -0500 | [diff] [blame] | 927 | if (left) |
Shawn O. Pearce | dc49cd7 | 2007-03-06 20:44:37 -0500 | [diff] [blame] | 928 | *left = win->len - xsize_t(offset); |
Shawn O. Pearce | 03e79c8 | 2006-12-23 02:34:08 -0500 | [diff] [blame] | 929 | return win->base + offset; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 930 | } |
| 931 | |
Nicolas Pitre | 27d69a4 | 2008-06-24 18:58:06 -0400 | [diff] [blame] | 932 | static struct packed_git *alloc_packed_git(int extra) |
| 933 | { |
| 934 | struct packed_git *p = xmalloc(sizeof(*p) + extra); |
| 935 | memset(p, 0, sizeof(*p)); |
| 936 | p->pack_fd = -1; |
| 937 | return p; |
| 938 | } |
| 939 | |
Jonathan Nieder | e050029 | 2010-11-06 14:00:38 -0500 | [diff] [blame] | 940 | static void try_to_free_pack_memory(size_t size) |
| 941 | { |
| 942 | release_pack_memory(size, -1); |
| 943 | } |
| 944 | |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 945 | struct packed_git *add_packed_git(const char *path, int path_len, int local) |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 946 | { |
Jonathan Nieder | e050029 | 2010-11-06 14:00:38 -0500 | [diff] [blame] | 947 | static int have_set_try_to_free_routine; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 948 | struct stat st; |
Nicolas Pitre | 27d69a4 | 2008-06-24 18:58:06 -0400 | [diff] [blame] | 949 | struct packed_git *p = alloc_packed_git(path_len + 2); |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 950 | |
Jonathan Nieder | e050029 | 2010-11-06 14:00:38 -0500 | [diff] [blame] | 951 | if (!have_set_try_to_free_routine) { |
| 952 | have_set_try_to_free_routine = 1; |
| 953 | set_try_to_free_routine(try_to_free_pack_memory); |
| 954 | } |
| 955 | |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 956 | /* |
| 957 | * Make sure a corresponding .pack file exists and that |
| 958 | * the index looks sane. |
| 959 | */ |
| 960 | path_len -= strlen(".idx"); |
Nicolas Pitre | 27d69a4 | 2008-06-24 18:58:06 -0400 | [diff] [blame] | 961 | if (path_len < 1) { |
| 962 | free(p); |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 963 | return NULL; |
Nicolas Pitre | 27d69a4 | 2008-06-24 18:58:06 -0400 | [diff] [blame] | 964 | } |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 965 | memcpy(p->pack_name, path, path_len); |
Brandon Casey | 8d25931 | 2008-11-12 11:59:03 -0600 | [diff] [blame] | 966 | |
| 967 | strcpy(p->pack_name + path_len, ".keep"); |
| 968 | if (!access(p->pack_name, F_OK)) |
| 969 | p->pack_keep = 1; |
| 970 | |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 971 | strcpy(p->pack_name + path_len, ".pack"); |
Shawn O. Pearce | d079837 | 2007-05-26 01:24:19 -0400 | [diff] [blame] | 972 | if (stat(p->pack_name, &st) || !S_ISREG(st.st_mode)) { |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 973 | free(p); |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 974 | return NULL; |
| 975 | } |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 976 | |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 977 | /* ok, it looks sane as far as we can check without |
| 978 | * actually mapping the pack file. |
| 979 | */ |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 980 | p->pack_size = st.st_size; |
Linus Torvalds | 9d835df | 2005-10-13 15:38:28 -0700 | [diff] [blame] | 981 | p->pack_local = local; |
Junio C Hamano | b867092 | 2007-03-09 03:52:12 -0800 | [diff] [blame] | 982 | p->mtime = st.st_mtime; |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 983 | if (path_len < 40 || get_sha1_hex(path + path_len - 40, p->sha1)) |
| 984 | hashclr(p->sha1); |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 985 | return p; |
| 986 | } |
| 987 | |
Shawn O. Pearce | 7b64469 | 2010-04-19 07:23:08 -0700 | [diff] [blame] | 988 | struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path) |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 989 | { |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 990 | const char *path = sha1_pack_name(sha1); |
Nicolas Pitre | 27d69a4 | 2008-06-24 18:58:06 -0400 | [diff] [blame] | 991 | struct packed_git *p = alloc_packed_git(strlen(path) + 1); |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 992 | |
Nicolas Pitre | 27d69a4 | 2008-06-24 18:58:06 -0400 | [diff] [blame] | 993 | strcpy(p->pack_name, path); |
| 994 | hashcpy(p->sha1, sha1); |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 995 | if (check_packed_git_idx(idx_path, p)) { |
| 996 | free(p); |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 997 | return NULL; |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 998 | } |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 999 | |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 1000 | return p; |
| 1001 | } |
| 1002 | |
| 1003 | void install_packed_git(struct packed_git *pack) |
| 1004 | { |
Shawn O. Pearce | c793430 | 2011-02-28 12:52:39 -0800 | [diff] [blame] | 1005 | if (pack->pack_fd != -1) |
| 1006 | pack_open_fds++; |
| 1007 | |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 1008 | pack->next = packed_git; |
| 1009 | packed_git = pack; |
| 1010 | } |
| 1011 | |
Nguyễn Thái Ngọc Duy | 543c5ca | 2013-02-15 19:07:10 +0700 | [diff] [blame] | 1012 | void (*report_garbage)(const char *desc, const char *path); |
| 1013 | |
| 1014 | static void report_helper(const struct string_list *list, |
| 1015 | int seen_bits, int first, int last) |
| 1016 | { |
| 1017 | const char *msg; |
| 1018 | switch (seen_bits) { |
| 1019 | case 0: |
| 1020 | msg = "no corresponding .idx nor .pack"; |
| 1021 | break; |
| 1022 | case 1: |
| 1023 | msg = "no corresponding .idx"; |
| 1024 | break; |
| 1025 | case 2: |
| 1026 | msg = "no corresponding .pack"; |
| 1027 | break; |
| 1028 | default: |
| 1029 | return; |
| 1030 | } |
| 1031 | for (; first < last; first++) |
| 1032 | report_garbage(msg, list->items[first].string); |
| 1033 | } |
| 1034 | |
| 1035 | static void report_pack_garbage(struct string_list *list) |
| 1036 | { |
| 1037 | int i, baselen = -1, first = 0, seen_bits = 0; |
| 1038 | |
| 1039 | if (!report_garbage) |
| 1040 | return; |
| 1041 | |
| 1042 | sort_string_list(list); |
| 1043 | |
| 1044 | for (i = 0; i < list->nr; i++) { |
| 1045 | const char *path = list->items[i].string; |
| 1046 | if (baselen != -1 && |
| 1047 | strncmp(path, list->items[first].string, baselen)) { |
| 1048 | report_helper(list, seen_bits, first, i); |
| 1049 | baselen = -1; |
| 1050 | seen_bits = 0; |
| 1051 | } |
| 1052 | if (baselen == -1) { |
| 1053 | const char *dot = strrchr(path, '.'); |
| 1054 | if (!dot) { |
| 1055 | report_garbage("garbage found", path); |
| 1056 | continue; |
| 1057 | } |
| 1058 | baselen = dot - path + 1; |
| 1059 | first = i; |
| 1060 | } |
| 1061 | if (!strcmp(path + baselen, "pack")) |
| 1062 | seen_bits |= 1; |
| 1063 | else if (!strcmp(path + baselen, "idx")) |
| 1064 | seen_bits |= 2; |
| 1065 | } |
| 1066 | report_helper(list, seen_bits, first, list->nr); |
| 1067 | } |
| 1068 | |
Linus Torvalds | 9d835df | 2005-10-13 15:38:28 -0700 | [diff] [blame] | 1069 | static void prepare_packed_git_one(char *objdir, int local) |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1070 | { |
Jim Meyering | 9cb18f5 | 2007-07-03 12:40:20 +0200 | [diff] [blame] | 1071 | /* Ensure that this buffer is large enough so that we can |
| 1072 | append "/pack/" without clobbering the stack even if |
| 1073 | strlen(objdir) were PATH_MAX. */ |
| 1074 | char path[PATH_MAX + 1 + 4 + 1 + 1]; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1075 | int len; |
| 1076 | DIR *dir; |
| 1077 | struct dirent *de; |
Nguyễn Thái Ngọc Duy | 543c5ca | 2013-02-15 19:07:10 +0700 | [diff] [blame] | 1078 | struct string_list garbage = STRING_LIST_INIT_DUP; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1079 | |
| 1080 | sprintf(path, "%s/pack", objdir); |
| 1081 | len = strlen(path); |
| 1082 | dir = opendir(path); |
Carl Worth | b5b1699 | 2006-02-17 16:14:52 -0800 | [diff] [blame] | 1083 | if (!dir) { |
Junio C Hamano | 26125f6 | 2006-02-22 11:16:38 -0800 | [diff] [blame] | 1084 | if (errno != ENOENT) |
Junio C Hamano | bd2afde | 2006-02-22 17:47:10 -0800 | [diff] [blame] | 1085 | error("unable to open object pack directory: %s: %s", |
Junio C Hamano | 26125f6 | 2006-02-22 11:16:38 -0800 | [diff] [blame] | 1086 | path, strerror(errno)); |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1087 | return; |
Carl Worth | b5b1699 | 2006-02-17 16:14:52 -0800 | [diff] [blame] | 1088 | } |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1089 | path[len++] = '/'; |
| 1090 | while ((de = readdir(dir)) != NULL) { |
| 1091 | int namelen = strlen(de->d_name); |
| 1092 | struct packed_git *p; |
| 1093 | |
Nguyễn Thái Ngọc Duy | 543c5ca | 2013-02-15 19:07:10 +0700 | [diff] [blame] | 1094 | if (len + namelen + 1 > sizeof(path)) { |
| 1095 | if (report_garbage) { |
| 1096 | struct strbuf sb = STRBUF_INIT; |
| 1097 | strbuf_addf(&sb, "%.*s/%s", len - 1, path, de->d_name); |
| 1098 | report_garbage("path too long", sb.buf); |
| 1099 | strbuf_release(&sb); |
| 1100 | } |
| 1101 | continue; |
| 1102 | } |
| 1103 | |
| 1104 | if (is_dot_or_dotdot(de->d_name)) |
Jim Meyering | 9cb18f5 | 2007-07-03 12:40:20 +0200 | [diff] [blame] | 1105 | continue; |
| 1106 | |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1107 | strcpy(path + len, de->d_name); |
Nguyễn Thái Ngọc Duy | d90906a | 2013-02-13 16:13:17 +0700 | [diff] [blame] | 1108 | |
| 1109 | if (has_extension(de->d_name, ".idx")) { |
| 1110 | /* Don't reopen a pack we already have. */ |
| 1111 | for (p = packed_git; p; p = p->next) { |
| 1112 | if (!memcmp(path, p->pack_name, len + namelen - 4)) |
| 1113 | break; |
| 1114 | } |
| 1115 | if (p == NULL && |
| 1116 | /* |
| 1117 | * See if it really is a valid .idx file with |
| 1118 | * corresponding .pack file that we can map. |
| 1119 | */ |
| 1120 | (p = add_packed_git(path, len + namelen, local)) != NULL) |
| 1121 | install_packed_git(p); |
Jeff King | 86f7780 | 2006-06-02 12:49:32 -0400 | [diff] [blame] | 1122 | } |
Nguyễn Thái Ngọc Duy | 543c5ca | 2013-02-15 19:07:10 +0700 | [diff] [blame] | 1123 | |
| 1124 | if (!report_garbage) |
| 1125 | continue; |
| 1126 | |
| 1127 | if (has_extension(de->d_name, ".idx") || |
| 1128 | has_extension(de->d_name, ".pack") || |
| 1129 | has_extension(de->d_name, ".keep")) |
| 1130 | string_list_append(&garbage, path); |
| 1131 | else |
| 1132 | report_garbage("garbage found", path); |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1133 | } |
Junio C Hamano | 5b35bcd | 2005-07-05 23:52:17 -0700 | [diff] [blame] | 1134 | closedir(dir); |
Nguyễn Thái Ngọc Duy | 543c5ca | 2013-02-15 19:07:10 +0700 | [diff] [blame] | 1135 | report_pack_garbage(&garbage); |
| 1136 | string_list_clear(&garbage, 0); |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1137 | } |
| 1138 | |
Junio C Hamano | b867092 | 2007-03-09 03:52:12 -0800 | [diff] [blame] | 1139 | static int sort_pack(const void *a_, const void *b_) |
| 1140 | { |
| 1141 | struct packed_git *a = *((struct packed_git **)a_); |
| 1142 | struct packed_git *b = *((struct packed_git **)b_); |
| 1143 | int st; |
| 1144 | |
| 1145 | /* |
| 1146 | * Local packs tend to contain objects specific to our |
| 1147 | * variant of the project than remote ones. In addition, |
| 1148 | * remote ones could be on a network mounted filesystem. |
| 1149 | * Favor local ones for these reasons. |
| 1150 | */ |
| 1151 | st = a->pack_local - b->pack_local; |
| 1152 | if (st) |
| 1153 | return -st; |
| 1154 | |
| 1155 | /* |
| 1156 | * Younger packs tend to contain more recent objects, |
| 1157 | * and more recent objects tend to get accessed more |
| 1158 | * often. |
| 1159 | */ |
| 1160 | if (a->mtime < b->mtime) |
| 1161 | return 1; |
| 1162 | else if (a->mtime == b->mtime) |
| 1163 | return 0; |
| 1164 | return -1; |
| 1165 | } |
| 1166 | |
| 1167 | static void rearrange_packed_git(void) |
| 1168 | { |
| 1169 | struct packed_git **ary, *p; |
| 1170 | int i, n; |
| 1171 | |
| 1172 | for (n = 0, p = packed_git; p; p = p->next) |
| 1173 | n++; |
| 1174 | if (n < 2) |
| 1175 | return; |
| 1176 | |
| 1177 | /* prepare an array of packed_git for easier sorting */ |
| 1178 | ary = xcalloc(n, sizeof(struct packed_git *)); |
| 1179 | for (n = 0, p = packed_git; p; p = p->next) |
| 1180 | ary[n++] = p; |
| 1181 | |
| 1182 | qsort(ary, n, sizeof(struct packed_git *), sort_pack); |
| 1183 | |
| 1184 | /* link them back again */ |
| 1185 | for (i = 0; i < n - 1; i++) |
| 1186 | ary[i]->next = ary[i + 1]; |
| 1187 | ary[n - 1]->next = NULL; |
| 1188 | packed_git = ary[0]; |
| 1189 | |
| 1190 | free(ary); |
| 1191 | } |
| 1192 | |
Jeff King | 637cdd9 | 2006-06-02 11:32:23 -0400 | [diff] [blame] | 1193 | static int prepare_packed_git_run_once = 0; |
Junio C Hamano | 9a217f2 | 2005-06-28 14:56:57 -0700 | [diff] [blame] | 1194 | void prepare_packed_git(void) |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1195 | { |
Junio C Hamano | d5a63b9 | 2005-08-14 17:25:57 -0700 | [diff] [blame] | 1196 | struct alternate_object_database *alt; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1197 | |
Jeff King | 637cdd9 | 2006-06-02 11:32:23 -0400 | [diff] [blame] | 1198 | if (prepare_packed_git_run_once) |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1199 | return; |
Linus Torvalds | 9d835df | 2005-10-13 15:38:28 -0700 | [diff] [blame] | 1200 | prepare_packed_git_one(get_object_directory(), 1); |
Junio C Hamano | 9a217f2 | 2005-06-28 14:56:57 -0700 | [diff] [blame] | 1201 | prepare_alt_odb(); |
Junio C Hamano | d5a63b9 | 2005-08-14 17:25:57 -0700 | [diff] [blame] | 1202 | for (alt = alt_odb_list; alt; alt = alt->next) { |
Junio C Hamano | 1494e03 | 2005-12-04 22:48:43 -0800 | [diff] [blame] | 1203 | alt->name[-1] = 0; |
Linus Torvalds | 9d835df | 2005-10-13 15:38:28 -0700 | [diff] [blame] | 1204 | prepare_packed_git_one(alt->base, 0); |
Junio C Hamano | 1494e03 | 2005-12-04 22:48:43 -0800 | [diff] [blame] | 1205 | alt->name[-1] = '/'; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1206 | } |
Junio C Hamano | b867092 | 2007-03-09 03:52:12 -0800 | [diff] [blame] | 1207 | rearrange_packed_git(); |
Jeff King | 637cdd9 | 2006-06-02 11:32:23 -0400 | [diff] [blame] | 1208 | prepare_packed_git_run_once = 1; |
| 1209 | } |
| 1210 | |
Shawn Pearce | fc04c41 | 2006-11-01 17:06:21 -0500 | [diff] [blame] | 1211 | void reprepare_packed_git(void) |
Jeff King | 637cdd9 | 2006-06-02 11:32:23 -0400 | [diff] [blame] | 1212 | { |
Nicolas Pitre | 4b480c6 | 2008-08-22 15:45:53 -0400 | [diff] [blame] | 1213 | discard_revindex(); |
Jeff King | 637cdd9 | 2006-06-02 11:32:23 -0400 | [diff] [blame] | 1214 | prepare_packed_git_run_once = 0; |
| 1215 | prepare_packed_git(); |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1216 | } |
| 1217 | |
Nicolas Pitre | 8eca0b4 | 2008-06-23 21:23:39 -0400 | [diff] [blame] | 1218 | static void mark_bad_packed_object(struct packed_git *p, |
| 1219 | const unsigned char *sha1) |
| 1220 | { |
| 1221 | unsigned i; |
| 1222 | for (i = 0; i < p->num_bad_objects; i++) |
| 1223 | if (!hashcmp(sha1, p->bad_object_sha1 + 20 * i)) |
| 1224 | return; |
| 1225 | p->bad_object_sha1 = xrealloc(p->bad_object_sha1, 20 * (p->num_bad_objects + 1)); |
| 1226 | hashcpy(p->bad_object_sha1 + 20 * p->num_bad_objects, sha1); |
| 1227 | p->num_bad_objects++; |
| 1228 | } |
| 1229 | |
Junio C Hamano | b6c4cec | 2010-10-28 11:13:06 -0700 | [diff] [blame] | 1230 | static const struct packed_git *has_packed_and_bad(const unsigned char *sha1) |
Nicolas Pitre | ac93910 | 2008-07-14 21:46:48 -0400 | [diff] [blame] | 1231 | { |
| 1232 | struct packed_git *p; |
| 1233 | unsigned i; |
| 1234 | |
| 1235 | for (p = packed_git; p; p = p->next) |
| 1236 | for (i = 0; i < p->num_bad_objects; i++) |
| 1237 | if (!hashcmp(sha1, p->bad_object_sha1 + 20 * i)) |
Junio C Hamano | b6c4cec | 2010-10-28 11:13:06 -0700 | [diff] [blame] | 1238 | return p; |
| 1239 | return NULL; |
Nicolas Pitre | ac93910 | 2008-07-14 21:46:48 -0400 | [diff] [blame] | 1240 | } |
| 1241 | |
Nguyễn Thái Ngọc Duy | 090ea12 | 2012-03-07 17:54:18 +0700 | [diff] [blame] | 1242 | /* |
| 1243 | * With an in-core object data in "map", rehash it to make sure the |
| 1244 | * object name actually matches "sha1" to detect object corruption. |
| 1245 | * With "map" == NULL, try reading the object named with "sha1" using |
| 1246 | * the streaming interface and rehash it to do the same. |
| 1247 | */ |
| 1248 | int check_sha1_signature(const unsigned char *sha1, void *map, |
| 1249 | unsigned long size, const char *type) |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 1250 | { |
| 1251 | unsigned char real_sha1[20]; |
Nguyễn Thái Ngọc Duy | 090ea12 | 2012-03-07 17:54:18 +0700 | [diff] [blame] | 1252 | enum object_type obj_type; |
| 1253 | struct git_istream *st; |
| 1254 | git_SHA_CTX c; |
| 1255 | char hdr[32]; |
| 1256 | int hdrlen; |
| 1257 | |
| 1258 | if (map) { |
| 1259 | hash_sha1_file(map, size, type, real_sha1); |
| 1260 | return hashcmp(sha1, real_sha1) ? -1 : 0; |
| 1261 | } |
| 1262 | |
| 1263 | st = open_istream(sha1, &obj_type, &size, NULL); |
| 1264 | if (!st) |
| 1265 | return -1; |
| 1266 | |
| 1267 | /* Generate the header */ |
| 1268 | hdrlen = sprintf(hdr, "%s %lu", typename(obj_type), size) + 1; |
| 1269 | |
| 1270 | /* Sha1.. */ |
| 1271 | git_SHA1_Init(&c); |
| 1272 | git_SHA1_Update(&c, hdr, hdrlen); |
| 1273 | for (;;) { |
| 1274 | char buf[1024 * 16]; |
| 1275 | ssize_t readlen = read_istream(st, buf, sizeof(buf)); |
| 1276 | |
Jeff King | f54fac5 | 2013-03-25 16:17:17 -0400 | [diff] [blame] | 1277 | if (readlen < 0) { |
| 1278 | close_istream(st); |
| 1279 | return -1; |
| 1280 | } |
Nguyễn Thái Ngọc Duy | 090ea12 | 2012-03-07 17:54:18 +0700 | [diff] [blame] | 1281 | if (!readlen) |
| 1282 | break; |
| 1283 | git_SHA1_Update(&c, buf, readlen); |
| 1284 | } |
| 1285 | git_SHA1_Final(real_sha1, &c); |
| 1286 | close_istream(st); |
David Rientjes | a89fccd | 2006-08-17 11:54:57 -0700 | [diff] [blame] | 1287 | return hashcmp(sha1, real_sha1) ? -1 : 0; |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 1288 | } |
| 1289 | |
Junio C Hamano | f4e5168 | 2011-05-15 12:16:29 -0700 | [diff] [blame] | 1290 | static int git_open_noatime(const char *name) |
Linus Torvalds | 44d1c19 | 2008-06-14 11:32:37 -0700 | [diff] [blame] | 1291 | { |
| 1292 | static int sha1_file_open_flag = O_NOATIME; |
Linus Torvalds | 44d1c19 | 2008-06-14 11:32:37 -0700 | [diff] [blame] | 1293 | |
Shawn O. Pearce | f2e872a | 2010-11-01 15:54:21 -0700 | [diff] [blame] | 1294 | for (;;) { |
| 1295 | int fd = open(name, O_RDONLY | sha1_file_open_flag); |
Linus Torvalds | 44d1c19 | 2008-06-14 11:32:37 -0700 | [diff] [blame] | 1296 | if (fd >= 0) |
Shawn O. Pearce | f2e872a | 2010-11-01 15:54:21 -0700 | [diff] [blame] | 1297 | return fd; |
| 1298 | |
Shawn O. Pearce | f2e872a | 2010-11-01 15:54:21 -0700 | [diff] [blame] | 1299 | /* Might the failure be due to O_NOATIME? */ |
| 1300 | if (errno != ENOENT && sha1_file_open_flag) { |
Linus Torvalds | 44d1c19 | 2008-06-14 11:32:37 -0700 | [diff] [blame] | 1301 | sha1_file_open_flag = 0; |
Shawn O. Pearce | f2e872a | 2010-11-01 15:54:21 -0700 | [diff] [blame] | 1302 | continue; |
| 1303 | } |
| 1304 | |
| 1305 | return -1; |
Linus Torvalds | 44d1c19 | 2008-06-14 11:32:37 -0700 | [diff] [blame] | 1306 | } |
Linus Torvalds | 44d1c19 | 2008-06-14 11:32:37 -0700 | [diff] [blame] | 1307 | } |
| 1308 | |
Jeff King | 052fe5e | 2013-07-12 02:30:48 -0400 | [diff] [blame] | 1309 | static int stat_sha1_file(const unsigned char *sha1, struct stat *st) |
| 1310 | { |
| 1311 | char *name = sha1_file_name(sha1); |
| 1312 | struct alternate_object_database *alt; |
| 1313 | |
| 1314 | if (!lstat(name, st)) |
| 1315 | return 0; |
| 1316 | |
| 1317 | prepare_alt_odb(); |
| 1318 | errno = ENOENT; |
| 1319 | for (alt = alt_odb_list; alt; alt = alt->next) { |
| 1320 | name = alt->name; |
| 1321 | fill_sha1_path(name, sha1); |
| 1322 | if (!lstat(alt->base, st)) |
| 1323 | return 0; |
| 1324 | } |
| 1325 | |
| 1326 | return -1; |
| 1327 | } |
| 1328 | |
Linus Torvalds | 44d1c19 | 2008-06-14 11:32:37 -0700 | [diff] [blame] | 1329 | static int open_sha1_file(const unsigned char *sha1) |
| 1330 | { |
| 1331 | int fd; |
| 1332 | char *name = sha1_file_name(sha1); |
| 1333 | struct alternate_object_database *alt; |
| 1334 | |
Junio C Hamano | f4e5168 | 2011-05-15 12:16:29 -0700 | [diff] [blame] | 1335 | fd = git_open_noatime(name); |
Linus Torvalds | 44d1c19 | 2008-06-14 11:32:37 -0700 | [diff] [blame] | 1336 | if (fd >= 0) |
| 1337 | return fd; |
| 1338 | |
| 1339 | prepare_alt_odb(); |
| 1340 | errno = ENOENT; |
| 1341 | for (alt = alt_odb_list; alt; alt = alt->next) { |
| 1342 | name = alt->name; |
| 1343 | fill_sha1_path(name, sha1); |
Junio C Hamano | f4e5168 | 2011-05-15 12:16:29 -0700 | [diff] [blame] | 1344 | fd = git_open_noatime(alt->base); |
Linus Torvalds | 44d1c19 | 2008-06-14 11:32:37 -0700 | [diff] [blame] | 1345 | if (fd >= 0) |
| 1346 | return fd; |
| 1347 | } |
| 1348 | return -1; |
| 1349 | } |
| 1350 | |
Junio C Hamano | f0270ef | 2011-05-14 19:42:10 -0700 | [diff] [blame] | 1351 | void *map_sha1_file(const unsigned char *sha1, unsigned long *size) |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 1352 | { |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 1353 | void *map; |
Linus Torvalds | 144bde7 | 2005-04-23 11:09:32 -0700 | [diff] [blame] | 1354 | int fd; |
Junio C Hamano | ace1534 | 2005-05-07 00:38:04 -0700 | [diff] [blame] | 1355 | |
Linus Torvalds | 44d1c19 | 2008-06-14 11:32:37 -0700 | [diff] [blame] | 1356 | fd = open_sha1_file(sha1); |
| 1357 | map = NULL; |
| 1358 | if (fd >= 0) { |
| 1359 | struct stat st; |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 1360 | |
Linus Torvalds | 44d1c19 | 2008-06-14 11:32:37 -0700 | [diff] [blame] | 1361 | if (!fstat(fd, &st)) { |
| 1362 | *size = xsize_t(st.st_size); |
Matthieu Moy | 33e42de | 2012-02-06 17:24:52 +0100 | [diff] [blame] | 1363 | if (!*size) { |
| 1364 | /* mmap() is forbidden on empty files */ |
| 1365 | error("object file %s is empty", sha1_file_name(sha1)); |
| 1366 | return NULL; |
| 1367 | } |
Linus Torvalds | 44d1c19 | 2008-06-14 11:32:37 -0700 | [diff] [blame] | 1368 | map = xmmap(NULL, *size, PROT_READ, MAP_PRIVATE, fd, 0); |
Linus Torvalds | 144bde7 | 2005-04-23 11:09:32 -0700 | [diff] [blame] | 1369 | } |
Linus Torvalds | 44d1c19 | 2008-06-14 11:32:37 -0700 | [diff] [blame] | 1370 | close(fd); |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 1371 | } |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 1372 | return map; |
| 1373 | } |
| 1374 | |
Junio C Hamano | cc5c54e | 2011-06-08 11:29:01 -0700 | [diff] [blame] | 1375 | /* |
| 1376 | * There used to be a second loose object header format which |
| 1377 | * was meant to mimic the in-pack format, allowing for direct |
| 1378 | * copy of the object data. This format turned up not to be |
| 1379 | * really worth it and we no longer write loose objects in that |
| 1380 | * format. |
| 1381 | */ |
| 1382 | static int experimental_loose_object(unsigned char *map) |
Junio C Hamano | bb6b8e4 | 2006-07-17 15:04:47 -0700 | [diff] [blame] | 1383 | { |
| 1384 | unsigned int word; |
| 1385 | |
| 1386 | /* |
Roberto Tyley | 7f684a2 | 2011-08-07 19:46:13 +0100 | [diff] [blame] | 1387 | * We must determine if the buffer contains the standard |
| 1388 | * zlib-deflated stream or the experimental format based |
| 1389 | * on the in-pack object format. Compare the header byte |
| 1390 | * for each format: |
| 1391 | * |
| 1392 | * RFC1950 zlib w/ deflate : 0www1000 : 0 <= www <= 7 |
| 1393 | * Experimental pack-based : Stttssss : ttt = 1,2,3,4 |
| 1394 | * |
| 1395 | * If bit 7 is clear and bits 0-3 equal 8, the buffer MUST be |
| 1396 | * in standard loose-object format, UNLESS it is a Git-pack |
| 1397 | * format object *exactly* 8 bytes in size when inflated. |
| 1398 | * |
| 1399 | * However, RFC1950 also specifies that the 1st 16-bit word |
| 1400 | * must be divisible by 31 - this checksum tells us our buffer |
| 1401 | * is in the standard format, giving a false positive only if |
| 1402 | * the 1st word of the Git-pack format object happens to be |
| 1403 | * divisible by 31, ie: |
| 1404 | * ((byte0 * 256) + byte1) % 31 = 0 |
| 1405 | * => 0ttt10000www1000 % 31 = 0 |
| 1406 | * |
| 1407 | * As it happens, this case can only arise for www=3 & ttt=1 |
| 1408 | * - ie, a Commit object, which would have to be 8 bytes in |
| 1409 | * size. As no Commit can be that small, we find that the |
| 1410 | * combination of these two criteria (bitmask & checksum) |
| 1411 | * can always correctly determine the buffer format. |
Junio C Hamano | bb6b8e4 | 2006-07-17 15:04:47 -0700 | [diff] [blame] | 1412 | */ |
| 1413 | word = (map[0] << 8) + map[1]; |
Roberto Tyley | 7f684a2 | 2011-08-07 19:46:13 +0100 | [diff] [blame] | 1414 | if ((map[0] & 0x8F) == 0x08 && !(word % 31)) |
Junio C Hamano | bb6b8e4 | 2006-07-17 15:04:47 -0700 | [diff] [blame] | 1415 | return 0; |
Junio C Hamano | cc5c54e | 2011-06-08 11:29:01 -0700 | [diff] [blame] | 1416 | else |
| 1417 | return 1; |
Junio C Hamano | bb6b8e4 | 2006-07-17 15:04:47 -0700 | [diff] [blame] | 1418 | } |
| 1419 | |
Nicolas Pitre | 09ded04 | 2008-10-29 19:02:46 -0400 | [diff] [blame] | 1420 | unsigned long unpack_object_header_buffer(const unsigned char *buf, |
| 1421 | unsigned long len, enum object_type *type, unsigned long *sizep) |
Junio C Hamano | ad1ed5e | 2006-09-01 15:17:01 -0700 | [diff] [blame] | 1422 | { |
| 1423 | unsigned shift; |
Linus Torvalds | 48fb7de | 2009-06-17 17:22:27 -0700 | [diff] [blame] | 1424 | unsigned long size, c; |
Junio C Hamano | ad1ed5e | 2006-09-01 15:17:01 -0700 | [diff] [blame] | 1425 | unsigned long used = 0; |
| 1426 | |
| 1427 | c = buf[used++]; |
| 1428 | *type = (c >> 4) & 7; |
| 1429 | size = c & 15; |
| 1430 | shift = 4; |
| 1431 | while (c & 0x80) { |
Pierre Habouzit | f630cfd | 2009-07-22 23:34:34 +0200 | [diff] [blame] | 1432 | if (len <= used || bitsizeof(long) <= shift) { |
Nicolas Pitre | 09ded04 | 2008-10-29 19:02:46 -0400 | [diff] [blame] | 1433 | error("bad object header"); |
Junio C Hamano | ea4f968 | 2011-10-27 11:42:57 -0700 | [diff] [blame] | 1434 | size = used = 0; |
| 1435 | break; |
Nicolas Pitre | 09ded04 | 2008-10-29 19:02:46 -0400 | [diff] [blame] | 1436 | } |
Junio C Hamano | ad1ed5e | 2006-09-01 15:17:01 -0700 | [diff] [blame] | 1437 | c = buf[used++]; |
| 1438 | size += (c & 0x7f) << shift; |
| 1439 | shift += 7; |
| 1440 | } |
| 1441 | *sizep = size; |
| 1442 | return used; |
| 1443 | } |
| 1444 | |
Junio C Hamano | eb4f407 | 2011-07-19 09:33:03 -0700 | [diff] [blame] | 1445 | int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz) |
Linus Torvalds | c448357 | 2005-06-01 17:54:59 -0700 | [diff] [blame] | 1446 | { |
Junio C Hamano | ad1ed5e | 2006-09-01 15:17:01 -0700 | [diff] [blame] | 1447 | unsigned long size, used; |
| 1448 | static const char valid_loose_object_type[8] = { |
| 1449 | 0, /* OBJ_EXT */ |
| 1450 | 1, 1, 1, 1, /* "commit", "tree", "blob", "tag" */ |
| 1451 | 0, /* "delta" and others are invalid in a loose object */ |
Linus Torvalds | 93821bd | 2006-07-11 12:48:08 -0700 | [diff] [blame] | 1452 | }; |
Junio C Hamano | ad1ed5e | 2006-09-01 15:17:01 -0700 | [diff] [blame] | 1453 | enum object_type type; |
Linus Torvalds | 93821bd | 2006-07-11 12:48:08 -0700 | [diff] [blame] | 1454 | |
Linus Torvalds | c448357 | 2005-06-01 17:54:59 -0700 | [diff] [blame] | 1455 | /* Get the data stream */ |
| 1456 | memset(stream, 0, sizeof(*stream)); |
| 1457 | stream->next_in = map; |
| 1458 | stream->avail_in = mapsize; |
| 1459 | stream->next_out = buffer; |
Linus Torvalds | 93821bd | 2006-07-11 12:48:08 -0700 | [diff] [blame] | 1460 | stream->avail_out = bufsiz; |
Linus Torvalds | c448357 | 2005-06-01 17:54:59 -0700 | [diff] [blame] | 1461 | |
Junio C Hamano | cc5c54e | 2011-06-08 11:29:01 -0700 | [diff] [blame] | 1462 | if (experimental_loose_object(map)) { |
| 1463 | /* |
| 1464 | * The old experimental format we no longer produce; |
| 1465 | * we can still read it. |
| 1466 | */ |
| 1467 | used = unpack_object_header_buffer(map, mapsize, &type, &size); |
| 1468 | if (!used || !valid_loose_object_type[type]) |
| 1469 | return -1; |
| 1470 | map += used; |
| 1471 | mapsize -= used; |
| 1472 | |
| 1473 | /* Set up the stream for the rest.. */ |
| 1474 | stream->next_in = map; |
| 1475 | stream->avail_in = mapsize; |
Linus Torvalds | 39c6854 | 2009-01-07 19:54:47 -0800 | [diff] [blame] | 1476 | git_inflate_init(stream); |
Junio C Hamano | cc5c54e | 2011-06-08 11:29:01 -0700 | [diff] [blame] | 1477 | |
| 1478 | /* And generate the fake traditional header */ |
| 1479 | stream->total_out = 1 + snprintf(buffer, bufsiz, "%s %lu", |
| 1480 | typename(type), size); |
| 1481 | return 0; |
Linus Torvalds | 93821bd | 2006-07-11 12:48:08 -0700 | [diff] [blame] | 1482 | } |
Linus Torvalds | 39c6854 | 2009-01-07 19:54:47 -0800 | [diff] [blame] | 1483 | git_inflate_init(stream); |
Junio C Hamano | cc5c54e | 2011-06-08 11:29:01 -0700 | [diff] [blame] | 1484 | return git_inflate(stream, 0); |
Linus Torvalds | c448357 | 2005-06-01 17:54:59 -0700 | [diff] [blame] | 1485 | } |
| 1486 | |
Junio C Hamano | ef49a7a | 2011-06-10 11:52:15 -0700 | [diff] [blame] | 1487 | static void *unpack_sha1_rest(git_zstream *stream, void *buffer, unsigned long size, const unsigned char *sha1) |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 1488 | { |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1489 | int bytes = strlen(buffer) + 1; |
Ilari Liusvaara | 3aee68a | 2010-01-26 20:24:14 +0200 | [diff] [blame] | 1490 | unsigned char *buf = xmallocz(size); |
Linus Torvalds | 93821bd | 2006-07-11 12:48:08 -0700 | [diff] [blame] | 1491 | unsigned long n; |
Junio C Hamano | 7efbff7 | 2007-03-05 00:21:37 -0800 | [diff] [blame] | 1492 | int status = Z_OK; |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 1493 | |
Linus Torvalds | 93821bd | 2006-07-11 12:48:08 -0700 | [diff] [blame] | 1494 | n = stream->total_out - bytes; |
| 1495 | if (n > size) |
| 1496 | n = size; |
| 1497 | memcpy(buf, (char *) buffer + bytes, n); |
| 1498 | bytes = n; |
Linus Torvalds | 456cdf6 | 2007-03-19 22:49:53 -0700 | [diff] [blame] | 1499 | if (bytes <= size) { |
| 1500 | /* |
| 1501 | * The above condition must be (bytes <= size), not |
| 1502 | * (bytes < size). In other words, even though we |
Junio C Hamano | ccf5ace | 2011-05-15 12:16:03 -0700 | [diff] [blame] | 1503 | * expect no more output and set avail_out to zero, |
Linus Torvalds | 456cdf6 | 2007-03-19 22:49:53 -0700 | [diff] [blame] | 1504 | * the input zlib stream may have bytes that express |
| 1505 | * "this concludes the stream", and we *do* want to |
| 1506 | * eat that input. |
| 1507 | * |
| 1508 | * Otherwise we would not be able to test that we |
| 1509 | * consumed all the input to reach the expected size; |
| 1510 | * we also want to check that zlib tells us that all |
| 1511 | * went well with status == Z_STREAM_END at the end. |
| 1512 | */ |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1513 | stream->next_out = buf + bytes; |
| 1514 | stream->avail_out = size - bytes; |
Junio C Hamano | 7efbff7 | 2007-03-05 00:21:37 -0800 | [diff] [blame] | 1515 | while (status == Z_OK) |
Linus Torvalds | 39c6854 | 2009-01-07 19:54:47 -0800 | [diff] [blame] | 1516 | status = git_inflate(stream, Z_FINISH); |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 1517 | } |
Linus Torvalds | 456cdf6 | 2007-03-19 22:49:53 -0700 | [diff] [blame] | 1518 | if (status == Z_STREAM_END && !stream->avail_in) { |
Linus Torvalds | 39c6854 | 2009-01-07 19:54:47 -0800 | [diff] [blame] | 1519 | git_inflate_end(stream); |
Junio C Hamano | 7efbff7 | 2007-03-05 00:21:37 -0800 | [diff] [blame] | 1520 | return buf; |
| 1521 | } |
| 1522 | |
| 1523 | if (status < 0) |
| 1524 | error("corrupt loose object '%s'", sha1_to_hex(sha1)); |
| 1525 | else if (stream->avail_in) |
| 1526 | error("garbage at end of loose object '%s'", |
| 1527 | sha1_to_hex(sha1)); |
| 1528 | free(buf); |
| 1529 | return NULL; |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 1530 | } |
| 1531 | |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1532 | /* |
| 1533 | * We used to just use "sscanf()", but that's actually way |
| 1534 | * too permissive for what we want to check. So do an anal |
| 1535 | * object header parse by hand. |
| 1536 | */ |
Junio C Hamano | f0270ef | 2011-05-14 19:42:10 -0700 | [diff] [blame] | 1537 | int parse_sha1_header(const char *hdr, unsigned long *sizep) |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1538 | { |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 1539 | char type[10]; |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1540 | int i; |
| 1541 | unsigned long size; |
| 1542 | |
| 1543 | /* |
Junio C Hamano | a6080a0 | 2007-06-07 00:04:01 -0700 | [diff] [blame] | 1544 | * The type can be at most ten bytes (including the |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1545 | * terminating '\0' that we add), and is followed by |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 1546 | * a space. |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1547 | */ |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 1548 | i = 0; |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1549 | for (;;) { |
| 1550 | char c = *hdr++; |
| 1551 | if (c == ' ') |
| 1552 | break; |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 1553 | type[i++] = c; |
| 1554 | if (i >= sizeof(type)) |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1555 | return -1; |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1556 | } |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 1557 | type[i] = 0; |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1558 | |
| 1559 | /* |
| 1560 | * The length must follow immediately, and be in canonical |
| 1561 | * decimal format (ie "010" is not valid). |
| 1562 | */ |
| 1563 | size = *hdr++ - '0'; |
| 1564 | if (size > 9) |
| 1565 | return -1; |
| 1566 | if (size) { |
| 1567 | for (;;) { |
| 1568 | unsigned long c = *hdr - '0'; |
| 1569 | if (c > 9) |
| 1570 | break; |
| 1571 | hdr++; |
| 1572 | size = size * 10 + c; |
| 1573 | } |
| 1574 | } |
| 1575 | *sizep = size; |
| 1576 | |
| 1577 | /* |
| 1578 | * The length must be followed by a zero byte |
| 1579 | */ |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 1580 | return *hdr ? -1 : type_from_string(type); |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1581 | } |
| 1582 | |
Junio C Hamano | 7efbff7 | 2007-03-05 00:21:37 -0800 | [diff] [blame] | 1583 | static void *unpack_sha1_file(void *map, unsigned long mapsize, enum object_type *type, unsigned long *size, const unsigned char *sha1) |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1584 | { |
| 1585 | int ret; |
Junio C Hamano | ef49a7a | 2011-06-10 11:52:15 -0700 | [diff] [blame] | 1586 | git_zstream stream; |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1587 | char hdr[8192]; |
| 1588 | |
| 1589 | ret = unpack_sha1_header(&stream, map, mapsize, hdr, sizeof(hdr)); |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 1590 | if (ret < Z_OK || (*type = parse_sha1_header(hdr, size)) < 0) |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1591 | return NULL; |
| 1592 | |
Junio C Hamano | 7efbff7 | 2007-03-05 00:21:37 -0800 | [diff] [blame] | 1593 | return unpack_sha1_rest(&stream, hdr, *size, sha1); |
Linus Torvalds | 5180cac | 2005-06-02 07:57:25 -0700 | [diff] [blame] | 1594 | } |
| 1595 | |
Nicolas Pitre | 54dab52 | 2007-04-16 12:31:56 -0400 | [diff] [blame] | 1596 | unsigned long get_size_from_delta(struct packed_git *p, |
| 1597 | struct pack_window **w_curs, |
| 1598 | off_t curpos) |
| 1599 | { |
| 1600 | const unsigned char *data; |
| 1601 | unsigned char delta_head[20], *in; |
Junio C Hamano | ef49a7a | 2011-06-10 11:52:15 -0700 | [diff] [blame] | 1602 | git_zstream stream; |
Nicolas Pitre | 54dab52 | 2007-04-16 12:31:56 -0400 | [diff] [blame] | 1603 | int st; |
| 1604 | |
| 1605 | memset(&stream, 0, sizeof(stream)); |
| 1606 | stream.next_out = delta_head; |
| 1607 | stream.avail_out = sizeof(delta_head); |
| 1608 | |
Linus Torvalds | 39c6854 | 2009-01-07 19:54:47 -0800 | [diff] [blame] | 1609 | git_inflate_init(&stream); |
Nicolas Pitre | 54dab52 | 2007-04-16 12:31:56 -0400 | [diff] [blame] | 1610 | do { |
| 1611 | in = use_pack(p, w_curs, curpos, &stream.avail_in); |
| 1612 | stream.next_in = in; |
Linus Torvalds | 39c6854 | 2009-01-07 19:54:47 -0800 | [diff] [blame] | 1613 | st = git_inflate(&stream, Z_FINISH); |
Nicolas Pitre | 54dab52 | 2007-04-16 12:31:56 -0400 | [diff] [blame] | 1614 | curpos += stream.next_in - in; |
| 1615 | } while ((st == Z_OK || st == Z_BUF_ERROR) && |
| 1616 | stream.total_out < sizeof(delta_head)); |
Linus Torvalds | 39c6854 | 2009-01-07 19:54:47 -0800 | [diff] [blame] | 1617 | git_inflate_end(&stream); |
Nicolas Pitre | 3d77d87 | 2008-10-29 19:02:47 -0400 | [diff] [blame] | 1618 | if ((st != Z_STREAM_END) && stream.total_out != sizeof(delta_head)) { |
| 1619 | error("delta data unpack-initial failed"); |
| 1620 | return 0; |
| 1621 | } |
Nicolas Pitre | 54dab52 | 2007-04-16 12:31:56 -0400 | [diff] [blame] | 1622 | |
| 1623 | /* Examine the initial part of the delta to figure out |
| 1624 | * the result size. |
| 1625 | */ |
| 1626 | data = delta_head; |
| 1627 | |
| 1628 | /* ignore base size */ |
| 1629 | get_delta_hdr_size(&data, delta_head+sizeof(delta_head)); |
| 1630 | |
| 1631 | /* Read the result size */ |
| 1632 | return get_delta_hdr_size(&data, delta_head+sizeof(delta_head)); |
| 1633 | } |
| 1634 | |
Shawn O. Pearce | c4001d9 | 2007-03-06 20:44:30 -0500 | [diff] [blame] | 1635 | static off_t get_delta_base(struct packed_git *p, |
Shawn O. Pearce | 03e79c8 | 2006-12-23 02:34:08 -0500 | [diff] [blame] | 1636 | struct pack_window **w_curs, |
Shawn O. Pearce | c4001d9 | 2007-03-06 20:44:30 -0500 | [diff] [blame] | 1637 | off_t *curpos, |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 1638 | enum object_type type, |
Shawn O. Pearce | c4001d9 | 2007-03-06 20:44:30 -0500 | [diff] [blame] | 1639 | off_t delta_obj_offset) |
Nicolas Pitre | eb32d23 | 2006-09-21 00:06:49 -0400 | [diff] [blame] | 1640 | { |
Nicolas Pitre | 2b87c45 | 2007-02-26 14:55:56 -0500 | [diff] [blame] | 1641 | unsigned char *base_info = use_pack(p, w_curs, *curpos, NULL); |
Shawn O. Pearce | c4001d9 | 2007-03-06 20:44:30 -0500 | [diff] [blame] | 1642 | off_t base_offset; |
Nicolas Pitre | eb32d23 | 2006-09-21 00:06:49 -0400 | [diff] [blame] | 1643 | |
Shawn O. Pearce | 8d8a4ea | 2006-12-23 02:34:18 -0500 | [diff] [blame] | 1644 | /* use_pack() assured us we have [base_info, base_info + 20) |
| 1645 | * as a range that we can look at without walking off the |
| 1646 | * end of the mapped window. Its actually the hash size |
| 1647 | * that is assured. An OFS_DELTA longer than the hash size |
| 1648 | * is stupid, as then a REF_DELTA would be smaller to store. |
| 1649 | */ |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 1650 | if (type == OBJ_OFS_DELTA) { |
Nicolas Pitre | eb32d23 | 2006-09-21 00:06:49 -0400 | [diff] [blame] | 1651 | unsigned used = 0; |
| 1652 | unsigned char c = base_info[used++]; |
| 1653 | base_offset = c & 127; |
| 1654 | while (c & 128) { |
| 1655 | base_offset += 1; |
Nicolas Pitre | 8723f21 | 2007-04-09 01:06:29 -0400 | [diff] [blame] | 1656 | if (!base_offset || MSB(base_offset, 7)) |
Nicolas Pitre | 8eca0b4 | 2008-06-23 21:23:39 -0400 | [diff] [blame] | 1657 | return 0; /* overflow */ |
Nicolas Pitre | eb32d23 | 2006-09-21 00:06:49 -0400 | [diff] [blame] | 1658 | c = base_info[used++]; |
| 1659 | base_offset = (base_offset << 7) + (c & 127); |
| 1660 | } |
| 1661 | base_offset = delta_obj_offset - base_offset; |
Nicolas Pitre | d8f3255 | 2008-10-29 19:02:45 -0400 | [diff] [blame] | 1662 | if (base_offset <= 0 || base_offset >= delta_obj_offset) |
Nicolas Pitre | 8eca0b4 | 2008-06-23 21:23:39 -0400 | [diff] [blame] | 1663 | return 0; /* out of bound */ |
Nicolas Pitre | 2b87c45 | 2007-02-26 14:55:56 -0500 | [diff] [blame] | 1664 | *curpos += used; |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 1665 | } else if (type == OBJ_REF_DELTA) { |
Nicolas Pitre | eb32d23 | 2006-09-21 00:06:49 -0400 | [diff] [blame] | 1666 | /* The base entry _must_ be in the same pack */ |
| 1667 | base_offset = find_pack_entry_one(base_info, p); |
Nicolas Pitre | 2b87c45 | 2007-02-26 14:55:56 -0500 | [diff] [blame] | 1668 | *curpos += 20; |
Nicolas Pitre | eb32d23 | 2006-09-21 00:06:49 -0400 | [diff] [blame] | 1669 | } else |
| 1670 | die("I am totally screwed"); |
Nicolas Pitre | 2b87c45 | 2007-02-26 14:55:56 -0500 | [diff] [blame] | 1671 | return base_offset; |
Nicolas Pitre | eb32d23 | 2006-09-21 00:06:49 -0400 | [diff] [blame] | 1672 | } |
| 1673 | |
Junio C Hamano | f8c8abc | 2011-05-13 15:33:33 -0700 | [diff] [blame] | 1674 | int unpack_object_header(struct packed_git *p, |
| 1675 | struct pack_window **w_curs, |
| 1676 | off_t *curpos, |
| 1677 | unsigned long *sizep) |
Linus Torvalds | a733cb6 | 2005-06-28 14:21:02 -0700 | [diff] [blame] | 1678 | { |
Shawn O. Pearce | 03e79c8 | 2006-12-23 02:34:08 -0500 | [diff] [blame] | 1679 | unsigned char *base; |
Junio C Hamano | ef49a7a | 2011-06-10 11:52:15 -0700 | [diff] [blame] | 1680 | unsigned long left; |
Junio C Hamano | ad1ed5e | 2006-09-01 15:17:01 -0700 | [diff] [blame] | 1681 | unsigned long used; |
Nicolas Pitre | 2b87c45 | 2007-02-26 14:55:56 -0500 | [diff] [blame] | 1682 | enum object_type type; |
Linus Torvalds | a733cb6 | 2005-06-28 14:21:02 -0700 | [diff] [blame] | 1683 | |
Shawn O. Pearce | 8d8a4ea | 2006-12-23 02:34:18 -0500 | [diff] [blame] | 1684 | /* use_pack() assures us we have [base, base + 20) available |
Jim Meyering | 0353a0c | 2011-04-13 17:39:40 +0200 | [diff] [blame] | 1685 | * as a range that we can look at. (Its actually the hash |
Pavel Roskin | 3dff537 | 2007-02-03 23:49:16 -0500 | [diff] [blame] | 1686 | * size that is assured.) With our object header encoding |
Shawn O. Pearce | 8d8a4ea | 2006-12-23 02:34:18 -0500 | [diff] [blame] | 1687 | * the maximum deflated object size is 2^137, which is just |
| 1688 | * insane, so we know won't exceed what we have been given. |
| 1689 | */ |
Nicolas Pitre | 2b87c45 | 2007-02-26 14:55:56 -0500 | [diff] [blame] | 1690 | base = use_pack(p, w_curs, *curpos, &left); |
Nicolas Pitre | 09ded04 | 2008-10-29 19:02:46 -0400 | [diff] [blame] | 1691 | used = unpack_object_header_buffer(base, left, &type, sizep); |
| 1692 | if (!used) { |
| 1693 | type = OBJ_BAD; |
| 1694 | } else |
| 1695 | *curpos += used; |
Junio C Hamano | ad1ed5e | 2006-09-01 15:17:01 -0700 | [diff] [blame] | 1696 | |
Nicolas Pitre | 2b87c45 | 2007-02-26 14:55:56 -0500 | [diff] [blame] | 1697 | return type; |
Linus Torvalds | a733cb6 | 2005-06-28 14:21:02 -0700 | [diff] [blame] | 1698 | } |
| 1699 | |
Thomas Rast | 790d96c | 2013-03-25 19:07:39 +0100 | [diff] [blame] | 1700 | static int retry_bad_packed_offset(struct packed_git *p, off_t obj_offset) |
| 1701 | { |
| 1702 | int type; |
| 1703 | struct revindex_entry *revidx; |
| 1704 | const unsigned char *sha1; |
| 1705 | revidx = find_pack_revindex(p, obj_offset); |
| 1706 | if (!revidx) |
| 1707 | return OBJ_BAD; |
| 1708 | sha1 = nth_packed_object_sha1(p, revidx->nr); |
| 1709 | mark_bad_packed_object(p, sha1); |
| 1710 | type = sha1_object_info(sha1, NULL); |
| 1711 | if (type <= OBJ_NONE) |
| 1712 | return OBJ_BAD; |
| 1713 | return type; |
| 1714 | } |
| 1715 | |
Thomas Rast | 790d96c | 2013-03-25 19:07:39 +0100 | [diff] [blame] | 1716 | #define POI_STACK_PREALLOC 64 |
| 1717 | |
Jeff King | 90191d3 | 2013-07-12 02:31:57 -0400 | [diff] [blame] | 1718 | static enum object_type packed_to_object_type(struct packed_git *p, |
| 1719 | off_t obj_offset, |
| 1720 | enum object_type type, |
| 1721 | struct pack_window **w_curs, |
| 1722 | off_t curpos) |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1723 | { |
Thomas Rast | 790d96c | 2013-03-25 19:07:39 +0100 | [diff] [blame] | 1724 | off_t small_poi_stack[POI_STACK_PREALLOC]; |
| 1725 | off_t *poi_stack = small_poi_stack; |
| 1726 | int poi_stack_nr = 0, poi_stack_alloc = POI_STACK_PREALLOC; |
Junio C Hamano | 5db47c2 | 2005-06-27 23:58:08 -0700 | [diff] [blame] | 1727 | |
Thomas Rast | 790d96c | 2013-03-25 19:07:39 +0100 | [diff] [blame] | 1728 | while (type == OBJ_OFS_DELTA || type == OBJ_REF_DELTA) { |
| 1729 | off_t base_offset; |
Jeff King | 90191d3 | 2013-07-12 02:31:57 -0400 | [diff] [blame] | 1730 | unsigned long size; |
Thomas Rast | 790d96c | 2013-03-25 19:07:39 +0100 | [diff] [blame] | 1731 | /* Push the object we're going to leave behind */ |
| 1732 | if (poi_stack_nr >= poi_stack_alloc && poi_stack == small_poi_stack) { |
| 1733 | poi_stack_alloc = alloc_nr(poi_stack_nr); |
| 1734 | poi_stack = xmalloc(sizeof(off_t)*poi_stack_alloc); |
| 1735 | memcpy(poi_stack, small_poi_stack, sizeof(off_t)*poi_stack_nr); |
| 1736 | } else { |
| 1737 | ALLOC_GROW(poi_stack, poi_stack_nr+1, poi_stack_alloc); |
| 1738 | } |
| 1739 | poi_stack[poi_stack_nr++] = obj_offset; |
| 1740 | /* If parsing the base offset fails, just unwind */ |
Jeff King | 90191d3 | 2013-07-12 02:31:57 -0400 | [diff] [blame] | 1741 | base_offset = get_delta_base(p, w_curs, &curpos, type, obj_offset); |
Thomas Rast | 790d96c | 2013-03-25 19:07:39 +0100 | [diff] [blame] | 1742 | if (!base_offset) |
| 1743 | goto unwind; |
| 1744 | curpos = obj_offset = base_offset; |
Jeff King | 90191d3 | 2013-07-12 02:31:57 -0400 | [diff] [blame] | 1745 | type = unpack_object_header(p, w_curs, &curpos, &size); |
Thomas Rast | 790d96c | 2013-03-25 19:07:39 +0100 | [diff] [blame] | 1746 | if (type <= OBJ_NONE) { |
| 1747 | /* If getting the base itself fails, we first |
| 1748 | * retry the base, otherwise unwind */ |
| 1749 | type = retry_bad_packed_offset(p, base_offset); |
| 1750 | if (type > OBJ_NONE) |
| 1751 | goto out; |
| 1752 | goto unwind; |
| 1753 | } |
| 1754 | } |
| 1755 | |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 1756 | switch (type) { |
Thomas Rast | 790d96c | 2013-03-25 19:07:39 +0100 | [diff] [blame] | 1757 | case OBJ_BAD: |
Linus Torvalds | a733cb6 | 2005-06-28 14:21:02 -0700 | [diff] [blame] | 1758 | case OBJ_COMMIT: |
Linus Torvalds | a733cb6 | 2005-06-28 14:21:02 -0700 | [diff] [blame] | 1759 | case OBJ_TREE: |
Linus Torvalds | a733cb6 | 2005-06-28 14:21:02 -0700 | [diff] [blame] | 1760 | case OBJ_BLOB: |
Linus Torvalds | a733cb6 | 2005-06-28 14:21:02 -0700 | [diff] [blame] | 1761 | case OBJ_TAG: |
Linus Torvalds | a69d094 | 2005-06-28 09:58:23 -0700 | [diff] [blame] | 1762 | break; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1763 | default: |
Nicolas Pitre | 3d77d87 | 2008-10-29 19:02:47 -0400 | [diff] [blame] | 1764 | error("unknown object type %i at offset %"PRIuMAX" in %s", |
| 1765 | type, (uintmax_t)obj_offset, p->pack_name); |
| 1766 | type = OBJ_BAD; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1767 | } |
Thomas Rast | 790d96c | 2013-03-25 19:07:39 +0100 | [diff] [blame] | 1768 | |
| 1769 | out: |
| 1770 | if (poi_stack != small_poi_stack) |
| 1771 | free(poi_stack); |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 1772 | return type; |
Thomas Rast | 790d96c | 2013-03-25 19:07:39 +0100 | [diff] [blame] | 1773 | |
| 1774 | unwind: |
| 1775 | while (poi_stack_nr) { |
| 1776 | obj_offset = poi_stack[--poi_stack_nr]; |
| 1777 | type = retry_bad_packed_offset(p, obj_offset); |
| 1778 | if (type > OBJ_NONE) |
| 1779 | goto out; |
| 1780 | } |
| 1781 | type = OBJ_BAD; |
| 1782 | goto out; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1783 | } |
| 1784 | |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1785 | static int packed_object_info(struct packed_git *p, off_t obj_offset, |
Jeff King | 23c339c | 2013-07-12 02:37:53 -0400 | [diff] [blame] | 1786 | struct object_info *oi) |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1787 | { |
| 1788 | struct pack_window *w_curs = NULL; |
| 1789 | unsigned long size; |
| 1790 | off_t curpos = obj_offset; |
| 1791 | enum object_type type; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1792 | |
Jeff King | 412916e | 2013-07-12 02:32:25 -0400 | [diff] [blame] | 1793 | /* |
| 1794 | * We always get the representation type, but only convert it to |
| 1795 | * a "real" type later if the caller is interested. |
| 1796 | */ |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1797 | type = unpack_object_header(p, &w_curs, &curpos, &size); |
| 1798 | |
Jeff King | 23c339c | 2013-07-12 02:37:53 -0400 | [diff] [blame] | 1799 | if (oi->sizep) { |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1800 | if (type == OBJ_OFS_DELTA || type == OBJ_REF_DELTA) { |
| 1801 | off_t tmp_pos = curpos; |
| 1802 | off_t base_offset = get_delta_base(p, &w_curs, &tmp_pos, |
| 1803 | type, obj_offset); |
| 1804 | if (!base_offset) { |
| 1805 | type = OBJ_BAD; |
| 1806 | goto out; |
| 1807 | } |
Jeff King | 23c339c | 2013-07-12 02:37:53 -0400 | [diff] [blame] | 1808 | *oi->sizep = get_size_from_delta(p, &w_curs, tmp_pos); |
| 1809 | if (*oi->sizep == 0) { |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1810 | type = OBJ_BAD; |
| 1811 | goto out; |
| 1812 | } |
| 1813 | } else { |
Jeff King | 23c339c | 2013-07-12 02:37:53 -0400 | [diff] [blame] | 1814 | *oi->sizep = size; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1815 | } |
| 1816 | } |
| 1817 | |
Jeff King | 23c339c | 2013-07-12 02:37:53 -0400 | [diff] [blame] | 1818 | if (oi->disk_sizep) { |
Jeff King | 161f00e | 2013-07-07 06:04:00 -0400 | [diff] [blame] | 1819 | struct revindex_entry *revidx = find_pack_revindex(p, obj_offset); |
Jeff King | 23c339c | 2013-07-12 02:37:53 -0400 | [diff] [blame] | 1820 | *oi->disk_sizep = revidx[1].offset - obj_offset; |
Jeff King | 161f00e | 2013-07-07 06:04:00 -0400 | [diff] [blame] | 1821 | } |
| 1822 | |
Jeff King | 23c339c | 2013-07-12 02:37:53 -0400 | [diff] [blame] | 1823 | if (oi->typep) { |
| 1824 | *oi->typep = packed_to_object_type(p, obj_offset, type, &w_curs, curpos); |
| 1825 | if (*oi->typep < 0) { |
Jeff King | 412916e | 2013-07-12 02:32:25 -0400 | [diff] [blame] | 1826 | type = OBJ_BAD; |
| 1827 | goto out; |
| 1828 | } |
| 1829 | } |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1830 | |
| 1831 | out: |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1832 | unuse_pack(&w_curs); |
| 1833 | return type; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 1834 | } |
| 1835 | |
Shawn Pearce | eb950c1 | 2006-08-26 04:12:27 -0400 | [diff] [blame] | 1836 | static void *unpack_compressed_entry(struct packed_git *p, |
Shawn O. Pearce | 03e79c8 | 2006-12-23 02:34:08 -0500 | [diff] [blame] | 1837 | struct pack_window **w_curs, |
Shawn O. Pearce | c4001d9 | 2007-03-06 20:44:30 -0500 | [diff] [blame] | 1838 | off_t curpos, |
Shawn Pearce | eb950c1 | 2006-08-26 04:12:27 -0400 | [diff] [blame] | 1839 | unsigned long size) |
Shawn Pearce | de530aa | 2006-08-26 04:10:43 -0400 | [diff] [blame] | 1840 | { |
| 1841 | int st; |
Junio C Hamano | ef49a7a | 2011-06-10 11:52:15 -0700 | [diff] [blame] | 1842 | git_zstream stream; |
Shawn O. Pearce | 079afb1 | 2006-12-23 02:34:13 -0500 | [diff] [blame] | 1843 | unsigned char *buffer, *in; |
Shawn Pearce | de530aa | 2006-08-26 04:10:43 -0400 | [diff] [blame] | 1844 | |
Ilari Liusvaara | 4ab07e4 | 2010-01-26 20:24:15 +0200 | [diff] [blame] | 1845 | buffer = xmallocz(size); |
Shawn Pearce | de530aa | 2006-08-26 04:10:43 -0400 | [diff] [blame] | 1846 | memset(&stream, 0, sizeof(stream)); |
Shawn Pearce | de530aa | 2006-08-26 04:10:43 -0400 | [diff] [blame] | 1847 | stream.next_out = buffer; |
Junio C Hamano | 39eea7b | 2009-10-21 23:06:14 -0700 | [diff] [blame] | 1848 | stream.avail_out = size + 1; |
Shawn Pearce | de530aa | 2006-08-26 04:10:43 -0400 | [diff] [blame] | 1849 | |
Linus Torvalds | 39c6854 | 2009-01-07 19:54:47 -0800 | [diff] [blame] | 1850 | git_inflate_init(&stream); |
Shawn O. Pearce | 079afb1 | 2006-12-23 02:34:13 -0500 | [diff] [blame] | 1851 | do { |
Nicolas Pitre | 2b87c45 | 2007-02-26 14:55:56 -0500 | [diff] [blame] | 1852 | in = use_pack(p, w_curs, curpos, &stream.avail_in); |
Shawn O. Pearce | 079afb1 | 2006-12-23 02:34:13 -0500 | [diff] [blame] | 1853 | stream.next_in = in; |
Linus Torvalds | 39c6854 | 2009-01-07 19:54:47 -0800 | [diff] [blame] | 1854 | st = git_inflate(&stream, Z_FINISH); |
Junio C Hamano | 39eea7b | 2009-10-21 23:06:14 -0700 | [diff] [blame] | 1855 | if (!stream.avail_out) |
| 1856 | break; /* the payload is larger than it should be */ |
Nicolas Pitre | 2b87c45 | 2007-02-26 14:55:56 -0500 | [diff] [blame] | 1857 | curpos += stream.next_in - in; |
Shawn O. Pearce | 079afb1 | 2006-12-23 02:34:13 -0500 | [diff] [blame] | 1858 | } while (st == Z_OK || st == Z_BUF_ERROR); |
Linus Torvalds | 39c6854 | 2009-01-07 19:54:47 -0800 | [diff] [blame] | 1859 | git_inflate_end(&stream); |
Shawn Pearce | de530aa | 2006-08-26 04:10:43 -0400 | [diff] [blame] | 1860 | if ((st != Z_STREAM_END) || stream.total_out != size) { |
| 1861 | free(buffer); |
| 1862 | return NULL; |
| 1863 | } |
| 1864 | |
| 1865 | return buffer; |
| 1866 | } |
| 1867 | |
Linus Torvalds | e5e0161 | 2007-03-17 12:44:06 -0700 | [diff] [blame] | 1868 | #define MAX_DELTA_CACHE (256) |
| 1869 | |
Shawn O. Pearce | 18bdec1 | 2007-03-19 01:14:37 -0400 | [diff] [blame] | 1870 | static size_t delta_base_cached; |
Nicolas Pitre | 5e08ecb | 2007-03-19 16:31:04 -0400 | [diff] [blame] | 1871 | |
| 1872 | static struct delta_base_cache_lru_list { |
| 1873 | struct delta_base_cache_lru_list *prev; |
| 1874 | struct delta_base_cache_lru_list *next; |
| 1875 | } delta_base_cache_lru = { &delta_base_cache_lru, &delta_base_cache_lru }; |
| 1876 | |
Linus Torvalds | e5e0161 | 2007-03-17 12:44:06 -0700 | [diff] [blame] | 1877 | static struct delta_base_cache_entry { |
Nicolas Pitre | 5e08ecb | 2007-03-19 16:31:04 -0400 | [diff] [blame] | 1878 | struct delta_base_cache_lru_list lru; |
| 1879 | void *data; |
Linus Torvalds | e5e0161 | 2007-03-17 12:44:06 -0700 | [diff] [blame] | 1880 | struct packed_git *p; |
| 1881 | off_t base_offset; |
| 1882 | unsigned long size; |
Linus Torvalds | e5e0161 | 2007-03-17 12:44:06 -0700 | [diff] [blame] | 1883 | enum object_type type; |
| 1884 | } delta_base_cache[MAX_DELTA_CACHE]; |
| 1885 | |
| 1886 | static unsigned long pack_entry_hash(struct packed_git *p, off_t base_offset) |
| 1887 | { |
| 1888 | unsigned long hash; |
| 1889 | |
| 1890 | hash = (unsigned long)p + (unsigned long)base_offset; |
| 1891 | hash += (hash >> 8) + (hash >> 16); |
Nicolas Pitre | 3358004 | 2007-03-19 16:28:51 -0400 | [diff] [blame] | 1892 | return hash % MAX_DELTA_CACHE; |
Linus Torvalds | e5e0161 | 2007-03-17 12:44:06 -0700 | [diff] [blame] | 1893 | } |
| 1894 | |
Thomas Rast | 84dd81c | 2013-03-27 21:03:41 +0100 | [diff] [blame] | 1895 | static struct delta_base_cache_entry * |
| 1896 | get_delta_base_cache_entry(struct packed_git *p, off_t base_offset) |
Junio C Hamano | 5266d36 | 2011-05-13 13:20:43 -0700 | [diff] [blame] | 1897 | { |
| 1898 | unsigned long hash = pack_entry_hash(p, base_offset); |
Thomas Rast | 84dd81c | 2013-03-27 21:03:41 +0100 | [diff] [blame] | 1899 | return delta_base_cache + hash; |
| 1900 | } |
| 1901 | |
| 1902 | static int eq_delta_base_cache_entry(struct delta_base_cache_entry *ent, |
| 1903 | struct packed_git *p, off_t base_offset) |
| 1904 | { |
Junio C Hamano | 5266d36 | 2011-05-13 13:20:43 -0700 | [diff] [blame] | 1905 | return (ent->data && ent->p == p && ent->base_offset == base_offset); |
| 1906 | } |
| 1907 | |
Thomas Rast | 84dd81c | 2013-03-27 21:03:41 +0100 | [diff] [blame] | 1908 | static int in_delta_base_cache(struct packed_git *p, off_t base_offset) |
| 1909 | { |
| 1910 | struct delta_base_cache_entry *ent; |
| 1911 | ent = get_delta_base_cache_entry(p, base_offset); |
| 1912 | return eq_delta_base_cache_entry(ent, p, base_offset); |
| 1913 | } |
| 1914 | |
| 1915 | static void clear_delta_base_cache_entry(struct delta_base_cache_entry *ent) |
| 1916 | { |
| 1917 | ent->data = NULL; |
| 1918 | ent->lru.next->prev = ent->lru.prev; |
| 1919 | ent->lru.prev->next = ent->lru.next; |
| 1920 | delta_base_cached -= ent->size; |
| 1921 | } |
| 1922 | |
Linus Torvalds | 62f255a | 2007-03-17 12:42:15 -0700 | [diff] [blame] | 1923 | static void *cache_or_unpack_entry(struct packed_git *p, off_t base_offset, |
Nicolas Pitre | a0cba10 | 2007-03-17 21:13:57 -0400 | [diff] [blame] | 1924 | unsigned long *base_size, enum object_type *type, int keep_cache) |
Linus Torvalds | 62f255a | 2007-03-17 12:42:15 -0700 | [diff] [blame] | 1925 | { |
Thomas Rast | 84dd81c | 2013-03-27 21:03:41 +0100 | [diff] [blame] | 1926 | struct delta_base_cache_entry *ent; |
Linus Torvalds | e5e0161 | 2007-03-17 12:44:06 -0700 | [diff] [blame] | 1927 | void *ret; |
Linus Torvalds | e5e0161 | 2007-03-17 12:44:06 -0700 | [diff] [blame] | 1928 | |
Thomas Rast | 84dd81c | 2013-03-27 21:03:41 +0100 | [diff] [blame] | 1929 | ent = get_delta_base_cache_entry(p, base_offset); |
| 1930 | |
| 1931 | if (!eq_delta_base_cache_entry(ent, p, base_offset)) |
Miklos Vajna | 749bc58 | 2008-10-09 02:11:24 +0200 | [diff] [blame] | 1932 | return unpack_entry(p, base_offset, type, base_size); |
Linus Torvalds | e5e0161 | 2007-03-17 12:44:06 -0700 | [diff] [blame] | 1933 | |
Thomas Rast | 84dd81c | 2013-03-27 21:03:41 +0100 | [diff] [blame] | 1934 | ret = ent->data; |
| 1935 | |
| 1936 | if (!keep_cache) |
| 1937 | clear_delta_base_cache_entry(ent); |
| 1938 | else |
Pierre Habouzit | 182af83 | 2007-09-16 00:32:36 +0200 | [diff] [blame] | 1939 | ret = xmemdupz(ent->data, ent->size); |
Linus Torvalds | e5e0161 | 2007-03-17 12:44:06 -0700 | [diff] [blame] | 1940 | *type = ent->type; |
| 1941 | *base_size = ent->size; |
| 1942 | return ret; |
Linus Torvalds | 62f255a | 2007-03-17 12:42:15 -0700 | [diff] [blame] | 1943 | } |
| 1944 | |
Shawn O. Pearce | 18bdec1 | 2007-03-19 01:14:37 -0400 | [diff] [blame] | 1945 | static inline void release_delta_base_cache(struct delta_base_cache_entry *ent) |
| 1946 | { |
| 1947 | if (ent->data) { |
| 1948 | free(ent->data); |
| 1949 | ent->data = NULL; |
Nicolas Pitre | 5e08ecb | 2007-03-19 16:31:04 -0400 | [diff] [blame] | 1950 | ent->lru.next->prev = ent->lru.prev; |
| 1951 | ent->lru.prev->next = ent->lru.next; |
Shawn O. Pearce | 18bdec1 | 2007-03-19 01:14:37 -0400 | [diff] [blame] | 1952 | delta_base_cached -= ent->size; |
| 1953 | } |
| 1954 | } |
| 1955 | |
Shawn O. Pearce | 3d20c63 | 2009-02-10 13:36:12 -0800 | [diff] [blame] | 1956 | void clear_delta_base_cache(void) |
| 1957 | { |
| 1958 | unsigned long p; |
| 1959 | for (p = 0; p < MAX_DELTA_CACHE; p++) |
| 1960 | release_delta_base_cache(&delta_base_cache[p]); |
| 1961 | } |
| 1962 | |
Linus Torvalds | 62f255a | 2007-03-17 12:42:15 -0700 | [diff] [blame] | 1963 | static void add_delta_base_cache(struct packed_git *p, off_t base_offset, |
| 1964 | void *base, unsigned long base_size, enum object_type type) |
| 1965 | { |
Nicolas Pitre | 5e08ecb | 2007-03-19 16:31:04 -0400 | [diff] [blame] | 1966 | unsigned long hash = pack_entry_hash(p, base_offset); |
Linus Torvalds | e5e0161 | 2007-03-17 12:44:06 -0700 | [diff] [blame] | 1967 | struct delta_base_cache_entry *ent = delta_base_cache + hash; |
Nicolas Pitre | 5e08ecb | 2007-03-19 16:31:04 -0400 | [diff] [blame] | 1968 | struct delta_base_cache_lru_list *lru; |
Linus Torvalds | e5e0161 | 2007-03-17 12:44:06 -0700 | [diff] [blame] | 1969 | |
Shawn O. Pearce | 18bdec1 | 2007-03-19 01:14:37 -0400 | [diff] [blame] | 1970 | release_delta_base_cache(ent); |
| 1971 | delta_base_cached += base_size; |
Nicolas Pitre | 5e08ecb | 2007-03-19 16:31:04 -0400 | [diff] [blame] | 1972 | |
| 1973 | for (lru = delta_base_cache_lru.next; |
| 1974 | delta_base_cached > delta_base_cache_limit |
| 1975 | && lru != &delta_base_cache_lru; |
| 1976 | lru = lru->next) { |
| 1977 | struct delta_base_cache_entry *f = (void *)lru; |
Shawn O. Pearce | 18bdec1 | 2007-03-19 01:14:37 -0400 | [diff] [blame] | 1978 | if (f->type == OBJ_BLOB) |
| 1979 | release_delta_base_cache(f); |
| 1980 | } |
Nicolas Pitre | 5e08ecb | 2007-03-19 16:31:04 -0400 | [diff] [blame] | 1981 | for (lru = delta_base_cache_lru.next; |
| 1982 | delta_base_cached > delta_base_cache_limit |
| 1983 | && lru != &delta_base_cache_lru; |
| 1984 | lru = lru->next) { |
| 1985 | struct delta_base_cache_entry *f = (void *)lru; |
| 1986 | release_delta_base_cache(f); |
| 1987 | } |
Shawn O. Pearce | 18bdec1 | 2007-03-19 01:14:37 -0400 | [diff] [blame] | 1988 | |
Linus Torvalds | e5e0161 | 2007-03-17 12:44:06 -0700 | [diff] [blame] | 1989 | ent->p = p; |
| 1990 | ent->base_offset = base_offset; |
| 1991 | ent->type = type; |
| 1992 | ent->data = base; |
| 1993 | ent->size = base_size; |
Nicolas Pitre | 5e08ecb | 2007-03-19 16:31:04 -0400 | [diff] [blame] | 1994 | ent->lru.next = &delta_base_cache_lru; |
| 1995 | ent->lru.prev = delta_base_cache_lru.prev; |
| 1996 | delta_base_cache_lru.prev->next = &ent->lru; |
| 1997 | delta_base_cache_lru.prev = &ent->lru; |
Linus Torvalds | 62f255a | 2007-03-17 12:42:15 -0700 | [diff] [blame] | 1998 | } |
| 1999 | |
Christian Couder | c2c5b27 | 2009-01-12 18:42:24 +0100 | [diff] [blame] | 2000 | static void *read_object(const unsigned char *sha1, enum object_type *type, |
| 2001 | unsigned long *size); |
| 2002 | |
Junio C Hamano | 5f44324 | 2011-07-06 19:08:55 -0700 | [diff] [blame] | 2003 | static void write_pack_access_log(struct packed_git *p, off_t obj_offset) |
| 2004 | { |
| 2005 | static FILE *log_file; |
| 2006 | |
Nguyễn Thái Ngọc Duy | b12ca96 | 2013-06-09 12:22:48 +0700 | [diff] [blame] | 2007 | if (!log_pack_access) |
| 2008 | log_pack_access = getenv("GIT_TRACE_PACK_ACCESS"); |
| 2009 | if (!log_pack_access) |
| 2010 | log_pack_access = no_log_pack_access; |
| 2011 | if (log_pack_access == no_log_pack_access) |
| 2012 | return; |
| 2013 | |
Junio C Hamano | 5f44324 | 2011-07-06 19:08:55 -0700 | [diff] [blame] | 2014 | if (!log_file) { |
| 2015 | log_file = fopen(log_pack_access, "w"); |
| 2016 | if (!log_file) { |
| 2017 | error("cannot open pack access log '%s' for writing: %s", |
| 2018 | log_pack_access, strerror(errno)); |
Nguyễn Thái Ngọc Duy | b12ca96 | 2013-06-09 12:22:48 +0700 | [diff] [blame] | 2019 | log_pack_access = no_log_pack_access; |
Junio C Hamano | 5f44324 | 2011-07-06 19:08:55 -0700 | [diff] [blame] | 2020 | return; |
| 2021 | } |
| 2022 | } |
| 2023 | fprintf(log_file, "%s %"PRIuMAX"\n", |
| 2024 | p->pack_name, (uintmax_t)obj_offset); |
| 2025 | fflush(log_file); |
| 2026 | } |
| 2027 | |
Nicolas Pitre | 0e8189e | 2008-10-31 11:31:08 -0400 | [diff] [blame] | 2028 | int do_check_packed_object_crc; |
| 2029 | |
Thomas Rast | abe601b | 2013-03-27 21:03:42 +0100 | [diff] [blame] | 2030 | #define UNPACK_ENTRY_STACK_PREALLOC 64 |
| 2031 | struct unpack_entry_stack_ent { |
| 2032 | off_t obj_offset; |
| 2033 | off_t curpos; |
| 2034 | unsigned long size; |
| 2035 | }; |
| 2036 | |
Shawn O. Pearce | c4001d9 | 2007-03-06 20:44:30 -0500 | [diff] [blame] | 2037 | void *unpack_entry(struct packed_git *p, off_t obj_offset, |
Thomas Rast | abe601b | 2013-03-27 21:03:42 +0100 | [diff] [blame] | 2038 | enum object_type *final_type, unsigned long *final_size) |
Junio C Hamano | f3bf922 | 2005-06-30 17:15:39 -0700 | [diff] [blame] | 2039 | { |
Shawn O. Pearce | 03e79c8 | 2006-12-23 02:34:08 -0500 | [diff] [blame] | 2040 | struct pack_window *w_curs = NULL; |
Shawn O. Pearce | c4001d9 | 2007-03-06 20:44:30 -0500 | [diff] [blame] | 2041 | off_t curpos = obj_offset; |
Thomas Rast | abe601b | 2013-03-27 21:03:42 +0100 | [diff] [blame] | 2042 | void *data = NULL; |
| 2043 | unsigned long size; |
| 2044 | enum object_type type; |
| 2045 | struct unpack_entry_stack_ent small_delta_stack[UNPACK_ENTRY_STACK_PREALLOC]; |
| 2046 | struct unpack_entry_stack_ent *delta_stack = small_delta_stack; |
| 2047 | int delta_stack_nr = 0, delta_stack_alloc = UNPACK_ENTRY_STACK_PREALLOC; |
| 2048 | int base_from_cache = 0; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2049 | |
Nguyễn Thái Ngọc Duy | b12ca96 | 2013-06-09 12:22:48 +0700 | [diff] [blame] | 2050 | if (log_pack_access != no_log_pack_access) |
Junio C Hamano | 5f44324 | 2011-07-06 19:08:55 -0700 | [diff] [blame] | 2051 | write_pack_access_log(p, obj_offset); |
| 2052 | |
Thomas Rast | abe601b | 2013-03-27 21:03:42 +0100 | [diff] [blame] | 2053 | /* PHASE 1: drill down to the innermost base object */ |
| 2054 | for (;;) { |
| 2055 | off_t base_offset; |
| 2056 | int i; |
| 2057 | struct delta_base_cache_entry *ent; |
| 2058 | |
| 2059 | if (do_check_packed_object_crc && p->index_version > 1) { |
| 2060 | struct revindex_entry *revidx = find_pack_revindex(p, obj_offset); |
| 2061 | unsigned long len = revidx[1].offset - obj_offset; |
| 2062 | if (check_pack_crc(p, &w_curs, obj_offset, len, revidx->nr)) { |
| 2063 | const unsigned char *sha1 = |
| 2064 | nth_packed_object_sha1(p, revidx->nr); |
| 2065 | error("bad packed object CRC for %s", |
| 2066 | sha1_to_hex(sha1)); |
| 2067 | mark_bad_packed_object(p, sha1); |
| 2068 | unuse_pack(&w_curs); |
| 2069 | return NULL; |
| 2070 | } |
Nicolas Pitre | 0e8189e | 2008-10-31 11:31:08 -0400 | [diff] [blame] | 2071 | } |
Thomas Rast | abe601b | 2013-03-27 21:03:42 +0100 | [diff] [blame] | 2072 | |
| 2073 | ent = get_delta_base_cache_entry(p, curpos); |
| 2074 | if (eq_delta_base_cache_entry(ent, p, curpos)) { |
| 2075 | type = ent->type; |
| 2076 | data = ent->data; |
| 2077 | size = ent->size; |
| 2078 | clear_delta_base_cache_entry(ent); |
| 2079 | base_from_cache = 1; |
| 2080 | break; |
| 2081 | } |
| 2082 | |
| 2083 | type = unpack_object_header(p, &w_curs, &curpos, &size); |
| 2084 | if (type != OBJ_OFS_DELTA && type != OBJ_REF_DELTA) |
| 2085 | break; |
| 2086 | |
| 2087 | base_offset = get_delta_base(p, &w_curs, &curpos, type, obj_offset); |
| 2088 | if (!base_offset) { |
| 2089 | error("failed to validate delta base reference " |
| 2090 | "at offset %"PRIuMAX" from %s", |
| 2091 | (uintmax_t)curpos, p->pack_name); |
| 2092 | /* bail to phase 2, in hopes of recovery */ |
| 2093 | data = NULL; |
| 2094 | break; |
| 2095 | } |
| 2096 | |
| 2097 | /* push object, proceed to base */ |
| 2098 | if (delta_stack_nr >= delta_stack_alloc |
| 2099 | && delta_stack == small_delta_stack) { |
| 2100 | delta_stack_alloc = alloc_nr(delta_stack_nr); |
| 2101 | delta_stack = xmalloc(sizeof(*delta_stack)*delta_stack_alloc); |
| 2102 | memcpy(delta_stack, small_delta_stack, |
| 2103 | sizeof(*delta_stack)*delta_stack_nr); |
| 2104 | } else { |
| 2105 | ALLOC_GROW(delta_stack, delta_stack_nr+1, delta_stack_alloc); |
| 2106 | } |
| 2107 | i = delta_stack_nr++; |
| 2108 | delta_stack[i].obj_offset = obj_offset; |
| 2109 | delta_stack[i].curpos = curpos; |
| 2110 | delta_stack[i].size = size; |
| 2111 | |
| 2112 | curpos = obj_offset = base_offset; |
Nicolas Pitre | 0e8189e | 2008-10-31 11:31:08 -0400 | [diff] [blame] | 2113 | } |
| 2114 | |
Thomas Rast | abe601b | 2013-03-27 21:03:42 +0100 | [diff] [blame] | 2115 | /* PHASE 2: handle the base */ |
| 2116 | switch (type) { |
Nicolas Pitre | eb32d23 | 2006-09-21 00:06:49 -0400 | [diff] [blame] | 2117 | case OBJ_OFS_DELTA: |
| 2118 | case OBJ_REF_DELTA: |
Thomas Rast | abe601b | 2013-03-27 21:03:42 +0100 | [diff] [blame] | 2119 | if (data) |
| 2120 | die("BUG in unpack_entry: left loop at a valid delta"); |
Shawn O. Pearce | 4d703a1 | 2006-12-23 02:33:25 -0500 | [diff] [blame] | 2121 | break; |
Linus Torvalds | a733cb6 | 2005-06-28 14:21:02 -0700 | [diff] [blame] | 2122 | case OBJ_COMMIT: |
Linus Torvalds | a733cb6 | 2005-06-28 14:21:02 -0700 | [diff] [blame] | 2123 | case OBJ_TREE: |
Linus Torvalds | a733cb6 | 2005-06-28 14:21:02 -0700 | [diff] [blame] | 2124 | case OBJ_BLOB: |
Linus Torvalds | a733cb6 | 2005-06-28 14:21:02 -0700 | [diff] [blame] | 2125 | case OBJ_TAG: |
Thomas Rast | abe601b | 2013-03-27 21:03:42 +0100 | [diff] [blame] | 2126 | if (!base_from_cache) |
| 2127 | data = unpack_compressed_entry(p, &w_curs, curpos, size); |
Shawn O. Pearce | 4d703a1 | 2006-12-23 02:33:25 -0500 | [diff] [blame] | 2128 | break; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2129 | default: |
Nicolas Pitre | 8eca0b4 | 2008-06-23 21:23:39 -0400 | [diff] [blame] | 2130 | data = NULL; |
| 2131 | error("unknown object type %i at offset %"PRIuMAX" in %s", |
Thomas Rast | abe601b | 2013-03-27 21:03:42 +0100 | [diff] [blame] | 2132 | type, (uintmax_t)obj_offset, p->pack_name); |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2133 | } |
Thomas Rast | abe601b | 2013-03-27 21:03:42 +0100 | [diff] [blame] | 2134 | |
| 2135 | /* PHASE 3: apply deltas in order */ |
| 2136 | |
| 2137 | /* invariants: |
| 2138 | * 'data' holds the base data, or NULL if there was corruption |
| 2139 | */ |
| 2140 | while (delta_stack_nr) { |
| 2141 | void *delta_data; |
| 2142 | void *base = data; |
| 2143 | unsigned long delta_size, base_size = size; |
| 2144 | int i; |
| 2145 | |
| 2146 | data = NULL; |
| 2147 | |
| 2148 | if (base) |
| 2149 | add_delta_base_cache(p, obj_offset, base, base_size, type); |
| 2150 | |
| 2151 | if (!base) { |
| 2152 | /* |
| 2153 | * We're probably in deep shit, but let's try to fetch |
| 2154 | * the required base anyway from another pack or loose. |
| 2155 | * This is costly but should happen only in the presence |
| 2156 | * of a corrupted pack, and is better than failing outright. |
| 2157 | */ |
| 2158 | struct revindex_entry *revidx; |
| 2159 | const unsigned char *base_sha1; |
| 2160 | revidx = find_pack_revindex(p, obj_offset); |
| 2161 | if (revidx) { |
| 2162 | base_sha1 = nth_packed_object_sha1(p, revidx->nr); |
| 2163 | error("failed to read delta base object %s" |
| 2164 | " at offset %"PRIuMAX" from %s", |
| 2165 | sha1_to_hex(base_sha1), (uintmax_t)obj_offset, |
| 2166 | p->pack_name); |
| 2167 | mark_bad_packed_object(p, base_sha1); |
| 2168 | base = read_object(base_sha1, &type, &base_size); |
| 2169 | } |
| 2170 | } |
| 2171 | |
| 2172 | i = --delta_stack_nr; |
| 2173 | obj_offset = delta_stack[i].obj_offset; |
| 2174 | curpos = delta_stack[i].curpos; |
| 2175 | delta_size = delta_stack[i].size; |
| 2176 | |
| 2177 | if (!base) |
| 2178 | continue; |
| 2179 | |
| 2180 | delta_data = unpack_compressed_entry(p, &w_curs, curpos, delta_size); |
| 2181 | |
| 2182 | if (!delta_data) { |
| 2183 | error("failed to unpack compressed delta " |
| 2184 | "at offset %"PRIuMAX" from %s", |
| 2185 | (uintmax_t)curpos, p->pack_name); |
Thomas Rast | abe601b | 2013-03-27 21:03:42 +0100 | [diff] [blame] | 2186 | data = NULL; |
| 2187 | continue; |
| 2188 | } |
| 2189 | |
| 2190 | data = patch_delta(base, base_size, |
| 2191 | delta_data, delta_size, |
| 2192 | &size); |
Jeff King | 1ee886c | 2013-06-14 17:53:34 -0400 | [diff] [blame] | 2193 | |
| 2194 | /* |
| 2195 | * We could not apply the delta; warn the user, but keep going. |
| 2196 | * Our failure will be noticed either in the next iteration of |
| 2197 | * the loop, or if this is the final delta, in the caller when |
| 2198 | * we return NULL. Those code paths will take care of making |
| 2199 | * a more explicit warning and retrying with another copy of |
| 2200 | * the object. |
| 2201 | */ |
Thomas Rast | abe601b | 2013-03-27 21:03:42 +0100 | [diff] [blame] | 2202 | if (!data) |
Jeff King | 1ee886c | 2013-06-14 17:53:34 -0400 | [diff] [blame] | 2203 | error("failed to apply delta"); |
Thomas Rast | abe601b | 2013-03-27 21:03:42 +0100 | [diff] [blame] | 2204 | |
Felipe Contreras | 4b8f772 | 2013-05-30 08:56:21 -0500 | [diff] [blame] | 2205 | free(delta_data); |
Thomas Rast | abe601b | 2013-03-27 21:03:42 +0100 | [diff] [blame] | 2206 | } |
| 2207 | |
| 2208 | *final_type = type; |
| 2209 | *final_size = size; |
| 2210 | |
Shawn O. Pearce | 03e79c8 | 2006-12-23 02:34:08 -0500 | [diff] [blame] | 2211 | unuse_pack(&w_curs); |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 2212 | return data; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2213 | } |
| 2214 | |
Shawn O. Pearce | d079837 | 2007-05-26 01:24:19 -0400 | [diff] [blame] | 2215 | const unsigned char *nth_packed_object_sha1(struct packed_git *p, |
Nicolas Pitre | d72308e | 2007-04-04 16:49:04 -0400 | [diff] [blame] | 2216 | uint32_t n) |
Junio C Hamano | 9a217f2 | 2005-06-28 14:56:57 -0700 | [diff] [blame] | 2217 | { |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 2218 | const unsigned char *index = p->index_data; |
Shawn O. Pearce | d079837 | 2007-05-26 01:24:19 -0400 | [diff] [blame] | 2219 | if (!index) { |
| 2220 | if (open_pack_index(p)) |
| 2221 | return NULL; |
| 2222 | index = p->index_data; |
| 2223 | } |
Nicolas Pitre | 5705909 | 2007-04-09 01:06:28 -0400 | [diff] [blame] | 2224 | if (n >= p->num_objects) |
Nicolas Pitre | d72308e | 2007-04-04 16:49:04 -0400 | [diff] [blame] | 2225 | return NULL; |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 2226 | index += 4 * 256; |
| 2227 | if (p->index_version == 1) { |
| 2228 | return index + 24 * n + 4; |
| 2229 | } else { |
| 2230 | index += 8; |
| 2231 | return index + 20 * n; |
| 2232 | } |
| 2233 | } |
| 2234 | |
Nicolas Pitre | 9909323 | 2008-06-24 23:17:12 -0400 | [diff] [blame] | 2235 | off_t nth_packed_object_offset(const struct packed_git *p, uint32_t n) |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 2236 | { |
| 2237 | const unsigned char *index = p->index_data; |
| 2238 | index += 4 * 256; |
| 2239 | if (p->index_version == 1) { |
| 2240 | return ntohl(*((uint32_t *)(index + 24 * n))); |
| 2241 | } else { |
| 2242 | uint32_t off; |
| 2243 | index += 8 + p->num_objects * (20 + 4); |
| 2244 | off = ntohl(*((uint32_t *)(index + 4 * n))); |
| 2245 | if (!(off & 0x80000000)) |
| 2246 | return off; |
| 2247 | index += p->num_objects * 4 + (off & 0x7fffffff) * 8; |
| 2248 | return (((uint64_t)ntohl(*((uint32_t *)(index + 0)))) << 32) | |
| 2249 | ntohl(*((uint32_t *)(index + 4))); |
| 2250 | } |
Junio C Hamano | 9a217f2 | 2005-06-28 14:56:57 -0700 | [diff] [blame] | 2251 | } |
| 2252 | |
Shawn O. Pearce | c4001d9 | 2007-03-06 20:44:30 -0500 | [diff] [blame] | 2253 | off_t find_pack_entry_one(const unsigned char *sha1, |
Nicolas Pitre | 4305730 | 2006-09-21 00:05:37 -0400 | [diff] [blame] | 2254 | struct packed_git *p) |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2255 | { |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 2256 | const uint32_t *level1_ofs = p->index_data; |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 2257 | const unsigned char *index = p->index_data; |
Junio C Hamano | 628522e | 2007-12-29 02:05:47 -0800 | [diff] [blame] | 2258 | unsigned hi, lo, stride; |
| 2259 | static int use_lookup = -1; |
| 2260 | static int debug_lookup = -1; |
| 2261 | |
| 2262 | if (debug_lookup < 0) |
| 2263 | debug_lookup = !!getenv("GIT_DEBUG_LOOKUP"); |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 2264 | |
Shawn O. Pearce | d079837 | 2007-05-26 01:24:19 -0400 | [diff] [blame] | 2265 | if (!index) { |
| 2266 | if (open_pack_index(p)) |
| 2267 | return 0; |
| 2268 | level1_ofs = p->index_data; |
| 2269 | index = p->index_data; |
| 2270 | } |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 2271 | if (p->index_version > 1) { |
| 2272 | level1_ofs += 2; |
| 2273 | index += 8; |
| 2274 | } |
Nicolas Pitre | 4287307 | 2007-03-16 16:42:50 -0400 | [diff] [blame] | 2275 | index += 4 * 256; |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 2276 | hi = ntohl(level1_ofs[*sha1]); |
| 2277 | lo = ((*sha1 == 0x0) ? 0 : ntohl(level1_ofs[*sha1 - 1])); |
Junio C Hamano | 628522e | 2007-12-29 02:05:47 -0800 | [diff] [blame] | 2278 | if (p->index_version > 1) { |
| 2279 | stride = 20; |
| 2280 | } else { |
| 2281 | stride = 24; |
| 2282 | index += 4; |
| 2283 | } |
| 2284 | |
| 2285 | if (debug_lookup) |
Ramsay Jones | 6e1c234 | 2008-07-03 16:52:09 +0100 | [diff] [blame] | 2286 | printf("%02x%02x%02x... lo %u hi %u nr %"PRIu32"\n", |
Junio C Hamano | 628522e | 2007-12-29 02:05:47 -0800 | [diff] [blame] | 2287 | sha1[0], sha1[1], sha1[2], lo, hi, p->num_objects); |
| 2288 | |
| 2289 | if (use_lookup < 0) |
| 2290 | use_lookup = !!getenv("GIT_USE_LOOKUP"); |
| 2291 | if (use_lookup) { |
| 2292 | int pos = sha1_entry_pos(index, stride, 0, |
| 2293 | lo, hi, p->num_objects, sha1); |
| 2294 | if (pos < 0) |
| 2295 | return 0; |
| 2296 | return nth_packed_object_offset(p, pos); |
| 2297 | } |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2298 | |
| 2299 | do { |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 2300 | unsigned mi = (lo + hi) / 2; |
Junio C Hamano | 628522e | 2007-12-29 02:05:47 -0800 | [diff] [blame] | 2301 | int cmp = hashcmp(index + mi * stride, sha1); |
| 2302 | |
| 2303 | if (debug_lookup) |
| 2304 | printf("lo %u hi %u rg %u mi %u\n", |
| 2305 | lo, hi, hi - lo, mi); |
Nicolas Pitre | 4305730 | 2006-09-21 00:05:37 -0400 | [diff] [blame] | 2306 | if (!cmp) |
Nicolas Pitre | 74e34e1 | 2007-04-09 01:06:35 -0400 | [diff] [blame] | 2307 | return nth_packed_object_offset(p, mi); |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2308 | if (cmp > 0) |
| 2309 | hi = mi; |
| 2310 | else |
| 2311 | lo = mi+1; |
| 2312 | } while (lo < hi); |
| 2313 | return 0; |
| 2314 | } |
| 2315 | |
Jeff King | 4c08018 | 2011-10-14 14:03:48 -0400 | [diff] [blame] | 2316 | int is_pack_valid(struct packed_git *p) |
Shawn O. Pearce | d131b7a | 2011-03-02 10:01:54 -0800 | [diff] [blame] | 2317 | { |
| 2318 | /* An already open pack is known to be valid. */ |
| 2319 | if (p->pack_fd != -1) |
| 2320 | return 1; |
| 2321 | |
| 2322 | /* If the pack has one window completely covering the |
| 2323 | * file size, the pack is known to be valid even if |
| 2324 | * the descriptor is not currently open. |
| 2325 | */ |
| 2326 | if (p->windows) { |
| 2327 | struct pack_window *w = p->windows; |
| 2328 | |
| 2329 | if (!w->offset && w->len == p->pack_size) |
| 2330 | return 1; |
| 2331 | } |
| 2332 | |
| 2333 | /* Force the pack to open to prove its valid. */ |
| 2334 | return !open_packed_git(p); |
| 2335 | } |
| 2336 | |
Nguyễn Thái Ngọc Duy | 9509973 | 2012-02-01 20:48:54 +0700 | [diff] [blame] | 2337 | static int fill_pack_entry(const unsigned char *sha1, |
| 2338 | struct pack_entry *e, |
| 2339 | struct packed_git *p) |
| 2340 | { |
| 2341 | off_t offset; |
| 2342 | |
| 2343 | if (p->num_bad_objects) { |
| 2344 | unsigned i; |
| 2345 | for (i = 0; i < p->num_bad_objects; i++) |
| 2346 | if (!hashcmp(sha1, p->bad_object_sha1 + 20 * i)) |
| 2347 | return 0; |
| 2348 | } |
| 2349 | |
| 2350 | offset = find_pack_entry_one(sha1, p); |
| 2351 | if (!offset) |
| 2352 | return 0; |
| 2353 | |
| 2354 | /* |
| 2355 | * We are about to tell the caller where they can locate the |
| 2356 | * requested object. We better make sure the packfile is |
| 2357 | * still here and can be accessed before supplying that |
| 2358 | * answer, as it may have been deleted since the index was |
| 2359 | * loaded! |
| 2360 | */ |
| 2361 | if (!is_pack_valid(p)) { |
| 2362 | warning("packfile %s cannot be accessed", p->pack_name); |
| 2363 | return 0; |
| 2364 | } |
| 2365 | e->offset = offset; |
| 2366 | e->p = p; |
| 2367 | hashcpy(e->sha1, sha1); |
| 2368 | return 1; |
| 2369 | } |
| 2370 | |
Brandon Casey | 4d6acb7 | 2009-03-19 22:47:54 -0500 | [diff] [blame] | 2371 | static int find_pack_entry(const unsigned char *sha1, struct pack_entry *e) |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2372 | { |
| 2373 | struct packed_git *p; |
Nicolas Pitre | 4305730 | 2006-09-21 00:05:37 -0400 | [diff] [blame] | 2374 | |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2375 | prepare_packed_git(); |
Nicolas Pitre | f7c22cc | 2007-05-30 22:48:13 -0400 | [diff] [blame] | 2376 | if (!packed_git) |
| 2377 | return 0; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2378 | |
Nguyễn Thái Ngọc Duy | c01f51c | 2012-02-01 20:48:55 +0700 | [diff] [blame] | 2379 | if (last_found_pack && fill_pack_entry(sha1, e, last_found_pack)) |
| 2380 | return 1; |
Nicolas Pitre | 8eca0b4 | 2008-06-23 21:23:39 -0400 | [diff] [blame] | 2381 | |
Nguyễn Thái Ngọc Duy | c01f51c | 2012-02-01 20:48:55 +0700 | [diff] [blame] | 2382 | for (p = packed_git; p; p = p->next) { |
| 2383 | if (p == last_found_pack || !fill_pack_entry(sha1, e, p)) |
| 2384 | continue; |
Nicolas Pitre | f7c22cc | 2007-05-30 22:48:13 -0400 | [diff] [blame] | 2385 | |
Nguyễn Thái Ngọc Duy | c01f51c | 2012-02-01 20:48:55 +0700 | [diff] [blame] | 2386 | last_found_pack = p; |
| 2387 | return 1; |
| 2388 | } |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2389 | return 0; |
| 2390 | } |
| 2391 | |
Junio C Hamano | a6080a0 | 2007-06-07 00:04:01 -0700 | [diff] [blame] | 2392 | struct packed_git *find_sha1_pack(const unsigned char *sha1, |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 2393 | struct packed_git *packs) |
| 2394 | { |
| 2395 | struct packed_git *p; |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 2396 | |
| 2397 | for (p = packs; p; p = p->next) { |
Nicolas Pitre | 4305730 | 2006-09-21 00:05:37 -0400 | [diff] [blame] | 2398 | if (find_pack_entry_one(sha1, p)) |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 2399 | return p; |
| 2400 | } |
| 2401 | return NULL; |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 2402 | |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 2403 | } |
| 2404 | |
Jeff King | 052fe5e | 2013-07-12 02:30:48 -0400 | [diff] [blame] | 2405 | static int sha1_loose_object_info(const unsigned char *sha1, |
Jeff King | 23c339c | 2013-07-12 02:37:53 -0400 | [diff] [blame] | 2406 | struct object_info *oi) |
Junio C Hamano | 65c2e0c | 2005-06-02 15:20:54 -0700 | [diff] [blame] | 2407 | { |
Junio C Hamano | 36e4d74 | 2005-06-27 03:34:06 -0700 | [diff] [blame] | 2408 | int status; |
Junio C Hamano | 65c2e0c | 2005-06-02 15:20:54 -0700 | [diff] [blame] | 2409 | unsigned long mapsize, size; |
| 2410 | void *map; |
Junio C Hamano | ef49a7a | 2011-06-10 11:52:15 -0700 | [diff] [blame] | 2411 | git_zstream stream; |
Nicolas Pitre | d65a16f | 2007-02-26 14:55:55 -0500 | [diff] [blame] | 2412 | char hdr[32]; |
Junio C Hamano | 65c2e0c | 2005-06-02 15:20:54 -0700 | [diff] [blame] | 2413 | |
Jeff King | 052fe5e | 2013-07-12 02:30:48 -0400 | [diff] [blame] | 2414 | /* |
| 2415 | * If we don't care about type or size, then we don't |
| 2416 | * need to look inside the object at all. |
| 2417 | */ |
Jeff King | 23c339c | 2013-07-12 02:37:53 -0400 | [diff] [blame] | 2418 | if (!oi->typep && !oi->sizep) { |
| 2419 | if (oi->disk_sizep) { |
Jeff King | 052fe5e | 2013-07-12 02:30:48 -0400 | [diff] [blame] | 2420 | struct stat st; |
| 2421 | if (stat_sha1_file(sha1, &st) < 0) |
| 2422 | return -1; |
Jeff King | 23c339c | 2013-07-12 02:37:53 -0400 | [diff] [blame] | 2423 | *oi->disk_sizep = st.st_size; |
Jeff King | 052fe5e | 2013-07-12 02:30:48 -0400 | [diff] [blame] | 2424 | } |
| 2425 | return 0; |
| 2426 | } |
| 2427 | |
Junio C Hamano | bb6b8e4 | 2006-07-17 15:04:47 -0700 | [diff] [blame] | 2428 | map = map_sha1_file(sha1, &mapsize); |
Johannes Schindelin | f0df4ed | 2006-11-28 00:18:55 +0100 | [diff] [blame] | 2429 | if (!map) |
Thomas Rast | dbea72a | 2013-05-30 22:00:22 +0200 | [diff] [blame] | 2430 | return -1; |
Jeff King | 23c339c | 2013-07-12 02:37:53 -0400 | [diff] [blame] | 2431 | if (oi->disk_sizep) |
| 2432 | *oi->disk_sizep = mapsize; |
Junio C Hamano | 36e4d74 | 2005-06-27 03:34:06 -0700 | [diff] [blame] | 2433 | if (unpack_sha1_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0) |
| 2434 | status = error("unable to unpack %s header", |
| 2435 | sha1_to_hex(sha1)); |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 2436 | else if ((status = parse_sha1_header(hdr, &size)) < 0) |
Junio C Hamano | 36e4d74 | 2005-06-27 03:34:06 -0700 | [diff] [blame] | 2437 | status = error("unable to parse %s header", sha1_to_hex(sha1)); |
Jeff King | 23c339c | 2013-07-12 02:37:53 -0400 | [diff] [blame] | 2438 | else if (oi->sizep) |
| 2439 | *oi->sizep = size; |
Linus Torvalds | 39c6854 | 2009-01-07 19:54:47 -0800 | [diff] [blame] | 2440 | git_inflate_end(&stream); |
Junio C Hamano | 65c2e0c | 2005-06-02 15:20:54 -0700 | [diff] [blame] | 2441 | munmap(map, mapsize); |
Jeff King | 23c339c | 2013-07-12 02:37:53 -0400 | [diff] [blame] | 2442 | if (oi->typep) |
| 2443 | *oi->typep = status; |
Jeff King | 052fe5e | 2013-07-12 02:30:48 -0400 | [diff] [blame] | 2444 | return 0; |
Junio C Hamano | 65c2e0c | 2005-06-02 15:20:54 -0700 | [diff] [blame] | 2445 | } |
| 2446 | |
Junio C Hamano | 9a49059 | 2011-05-12 15:51:38 -0700 | [diff] [blame] | 2447 | int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi) |
Johannes Schindelin | f0df4ed | 2006-11-28 00:18:55 +0100 | [diff] [blame] | 2448 | { |
Nguyễn Thái Ngọc Duy | c4d9986 | 2011-02-05 21:03:02 +0700 | [diff] [blame] | 2449 | struct cached_object *co; |
Johannes Schindelin | f0df4ed | 2006-11-28 00:18:55 +0100 | [diff] [blame] | 2450 | struct pack_entry e; |
Jeff King | 5b08640 | 2013-07-12 02:34:57 -0400 | [diff] [blame] | 2451 | int rtype; |
Johannes Schindelin | f0df4ed | 2006-11-28 00:18:55 +0100 | [diff] [blame] | 2452 | |
Nguyễn Thái Ngọc Duy | c4d9986 | 2011-02-05 21:03:02 +0700 | [diff] [blame] | 2453 | co = find_cached_object(sha1); |
| 2454 | if (co) { |
Jeff King | 5b08640 | 2013-07-12 02:34:57 -0400 | [diff] [blame] | 2455 | if (oi->typep) |
| 2456 | *(oi->typep) = co->type; |
Junio C Hamano | 9a49059 | 2011-05-12 15:51:38 -0700 | [diff] [blame] | 2457 | if (oi->sizep) |
| 2458 | *(oi->sizep) = co->size; |
Jeff King | 161f00e | 2013-07-07 06:04:00 -0400 | [diff] [blame] | 2459 | if (oi->disk_sizep) |
| 2460 | *(oi->disk_sizep) = 0; |
Junio C Hamano | 9a49059 | 2011-05-12 15:51:38 -0700 | [diff] [blame] | 2461 | oi->whence = OI_CACHED; |
Jeff King | 5b08640 | 2013-07-12 02:34:57 -0400 | [diff] [blame] | 2462 | return 0; |
Nguyễn Thái Ngọc Duy | c4d9986 | 2011-02-05 21:03:02 +0700 | [diff] [blame] | 2463 | } |
| 2464 | |
Junio C Hamano | cd673c1 | 2009-02-27 23:15:53 -0800 | [diff] [blame] | 2465 | if (!find_pack_entry(sha1, &e)) { |
Steven Grimm | ddd63e6 | 2008-08-05 13:08:41 -0700 | [diff] [blame] | 2466 | /* Most likely it's a loose object. */ |
Jeff King | 23c339c | 2013-07-12 02:37:53 -0400 | [diff] [blame] | 2467 | if (!sha1_loose_object_info(sha1, oi)) { |
Junio C Hamano | 9a49059 | 2011-05-12 15:51:38 -0700 | [diff] [blame] | 2468 | oi->whence = OI_LOOSE; |
Jeff King | 5b08640 | 2013-07-12 02:34:57 -0400 | [diff] [blame] | 2469 | return 0; |
Junio C Hamano | 9a49059 | 2011-05-12 15:51:38 -0700 | [diff] [blame] | 2470 | } |
Steven Grimm | ddd63e6 | 2008-08-05 13:08:41 -0700 | [diff] [blame] | 2471 | |
| 2472 | /* Not a loose object; someone else may have just packed it. */ |
Johannes Schindelin | f0df4ed | 2006-11-28 00:18:55 +0100 | [diff] [blame] | 2473 | reprepare_packed_git(); |
Junio C Hamano | cd673c1 | 2009-02-27 23:15:53 -0800 | [diff] [blame] | 2474 | if (!find_pack_entry(sha1, &e)) |
Jeff King | 052fe5e | 2013-07-12 02:30:48 -0400 | [diff] [blame] | 2475 | return -1; |
Johannes Schindelin | f0df4ed | 2006-11-28 00:18:55 +0100 | [diff] [blame] | 2476 | } |
Nicolas Pitre | 3d77d87 | 2008-10-29 19:02:47 -0400 | [diff] [blame] | 2477 | |
Jeff King | 23c339c | 2013-07-12 02:37:53 -0400 | [diff] [blame] | 2478 | rtype = packed_object_info(e.p, e.offset, oi); |
Jeff King | 412916e | 2013-07-12 02:32:25 -0400 | [diff] [blame] | 2479 | if (rtype < 0) { |
Nicolas Pitre | 3d77d87 | 2008-10-29 19:02:47 -0400 | [diff] [blame] | 2480 | mark_bad_packed_object(e.p, sha1); |
Jeff King | 412916e | 2013-07-12 02:32:25 -0400 | [diff] [blame] | 2481 | return sha1_object_info_extended(sha1, oi); |
Junio C Hamano | 5266d36 | 2011-05-13 13:20:43 -0700 | [diff] [blame] | 2482 | } else if (in_delta_base_cache(e.p, e.offset)) { |
| 2483 | oi->whence = OI_DBCACHED; |
Junio C Hamano | 9a49059 | 2011-05-12 15:51:38 -0700 | [diff] [blame] | 2484 | } else { |
| 2485 | oi->whence = OI_PACKED; |
| 2486 | oi->u.packed.offset = e.offset; |
| 2487 | oi->u.packed.pack = e.p; |
| 2488 | oi->u.packed.is_delta = (rtype == OBJ_REF_DELTA || |
| 2489 | rtype == OBJ_OFS_DELTA); |
Nicolas Pitre | 3d77d87 | 2008-10-29 19:02:47 -0400 | [diff] [blame] | 2490 | } |
| 2491 | |
Jeff King | 5b08640 | 2013-07-12 02:34:57 -0400 | [diff] [blame] | 2492 | return 0; |
Johannes Schindelin | f0df4ed | 2006-11-28 00:18:55 +0100 | [diff] [blame] | 2493 | } |
| 2494 | |
Christian Couder | 3fc0dca | 2013-10-27 00:34:30 +0200 | [diff] [blame] | 2495 | /* returns enum object_type or negative */ |
Junio C Hamano | 9a49059 | 2011-05-12 15:51:38 -0700 | [diff] [blame] | 2496 | int sha1_object_info(const unsigned char *sha1, unsigned long *sizep) |
| 2497 | { |
Jeff King | 5b08640 | 2013-07-12 02:34:57 -0400 | [diff] [blame] | 2498 | enum object_type type; |
Ramsay Jones | d099b71 | 2013-07-18 21:25:50 +0100 | [diff] [blame] | 2499 | struct object_info oi = {NULL}; |
Junio C Hamano | 9a49059 | 2011-05-12 15:51:38 -0700 | [diff] [blame] | 2500 | |
Jeff King | 5b08640 | 2013-07-12 02:34:57 -0400 | [diff] [blame] | 2501 | oi.typep = &type; |
Junio C Hamano | 9a49059 | 2011-05-12 15:51:38 -0700 | [diff] [blame] | 2502 | oi.sizep = sizep; |
Jeff King | 5b08640 | 2013-07-12 02:34:57 -0400 | [diff] [blame] | 2503 | if (sha1_object_info_extended(sha1, &oi) < 0) |
| 2504 | return -1; |
| 2505 | return type; |
Junio C Hamano | 9a49059 | 2011-05-12 15:51:38 -0700 | [diff] [blame] | 2506 | } |
| 2507 | |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 2508 | static void *read_packed_sha1(const unsigned char *sha1, |
| 2509 | enum object_type *type, unsigned long *size) |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2510 | { |
| 2511 | struct pack_entry e; |
Nicolas Pitre | 8eca0b4 | 2008-06-23 21:23:39 -0400 | [diff] [blame] | 2512 | void *data; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2513 | |
Junio C Hamano | cd673c1 | 2009-02-27 23:15:53 -0800 | [diff] [blame] | 2514 | if (!find_pack_entry(sha1, &e)) |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2515 | return NULL; |
Nicolas Pitre | 8eca0b4 | 2008-06-23 21:23:39 -0400 | [diff] [blame] | 2516 | data = cache_or_unpack_entry(e.p, e.offset, size, type, 1); |
| 2517 | if (!data) { |
| 2518 | /* |
| 2519 | * We're probably in deep shit, but let's try to fetch |
| 2520 | * the required object anyway from another pack or loose. |
| 2521 | * This should happen only in the presence of a corrupted |
| 2522 | * pack, and is better than failing outright. |
| 2523 | */ |
| 2524 | error("failed to read object %s at offset %"PRIuMAX" from %s", |
| 2525 | sha1_to_hex(sha1), (uintmax_t)e.offset, e.p->pack_name); |
| 2526 | mark_bad_packed_object(e.p, sha1); |
Nicolas Pitre | ac93910 | 2008-07-14 21:46:48 -0400 | [diff] [blame] | 2527 | data = read_object(sha1, type, size); |
Nicolas Pitre | 8eca0b4 | 2008-06-23 21:23:39 -0400 | [diff] [blame] | 2528 | } |
| 2529 | return data; |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2530 | } |
| 2531 | |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 2532 | int pretend_sha1_file(void *buf, unsigned long len, enum object_type type, |
| 2533 | unsigned char *sha1) |
Junio C Hamano | d66b37b | 2007-02-04 21:42:38 -0800 | [diff] [blame] | 2534 | { |
| 2535 | struct cached_object *co; |
| 2536 | |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 2537 | hash_sha1_file(buf, len, typename(type), sha1); |
Junio C Hamano | d66b37b | 2007-02-04 21:42:38 -0800 | [diff] [blame] | 2538 | if (has_sha1_file(sha1) || find_cached_object(sha1)) |
| 2539 | return 0; |
| 2540 | if (cached_object_alloc <= cached_object_nr) { |
| 2541 | cached_object_alloc = alloc_nr(cached_object_alloc); |
| 2542 | cached_objects = xrealloc(cached_objects, |
| 2543 | sizeof(*cached_objects) * |
| 2544 | cached_object_alloc); |
| 2545 | } |
| 2546 | co = &cached_objects[cached_object_nr++]; |
| 2547 | co->size = len; |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 2548 | co->type = type; |
Junio C Hamano | efa13f7 | 2007-02-15 17:02:06 -0800 | [diff] [blame] | 2549 | co->buf = xmalloc(len); |
| 2550 | memcpy(co->buf, buf, len); |
Junio C Hamano | d66b37b | 2007-02-04 21:42:38 -0800 | [diff] [blame] | 2551 | hashcpy(co->sha1, sha1); |
| 2552 | return 0; |
| 2553 | } |
| 2554 | |
Christian Couder | c2c5b27 | 2009-01-12 18:42:24 +0100 | [diff] [blame] | 2555 | static void *read_object(const unsigned char *sha1, enum object_type *type, |
| 2556 | unsigned long *size) |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 2557 | { |
| 2558 | unsigned long mapsize; |
| 2559 | void *map, *buf; |
Junio C Hamano | d66b37b | 2007-02-04 21:42:38 -0800 | [diff] [blame] | 2560 | struct cached_object *co; |
| 2561 | |
| 2562 | co = find_cached_object(sha1); |
| 2563 | if (co) { |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 2564 | *type = co->type; |
Junio C Hamano | d66b37b | 2007-02-04 21:42:38 -0800 | [diff] [blame] | 2565 | *size = co->size; |
Pierre Habouzit | 182af83 | 2007-09-16 00:32:36 +0200 | [diff] [blame] | 2566 | return xmemdupz(co->buf, co->size); |
Junio C Hamano | d66b37b | 2007-02-04 21:42:38 -0800 | [diff] [blame] | 2567 | } |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 2568 | |
Peter Eriksen | 8276c00 | 2007-01-22 21:29:45 +0100 | [diff] [blame] | 2569 | buf = read_packed_sha1(sha1, type, size); |
| 2570 | if (buf) |
| 2571 | return buf; |
Junio C Hamano | bb6b8e4 | 2006-07-17 15:04:47 -0700 | [diff] [blame] | 2572 | map = map_sha1_file(sha1, &mapsize); |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 2573 | if (map) { |
Junio C Hamano | 7efbff7 | 2007-03-05 00:21:37 -0800 | [diff] [blame] | 2574 | buf = unpack_sha1_file(map, mapsize, type, size, sha1); |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 2575 | munmap(map, mapsize); |
| 2576 | return buf; |
| 2577 | } |
Jeff King | 637cdd9 | 2006-06-02 11:32:23 -0400 | [diff] [blame] | 2578 | reprepare_packed_git(); |
Peter Eriksen | 8276c00 | 2007-01-22 21:29:45 +0100 | [diff] [blame] | 2579 | return read_packed_sha1(sha1, type, size); |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 2580 | } |
| 2581 | |
Junio C Hamano | b6c4cec | 2010-10-28 11:13:06 -0700 | [diff] [blame] | 2582 | /* |
| 2583 | * This function dies on corrupt objects; the callers who want to |
| 2584 | * deal with them should arrange to call read_object() and give error |
| 2585 | * messages themselves. |
| 2586 | */ |
Junio C Hamano | 5bf29b9 | 2011-05-15 12:54:54 -0700 | [diff] [blame] | 2587 | void *read_sha1_file_extended(const unsigned char *sha1, |
| 2588 | enum object_type *type, |
| 2589 | unsigned long *size, |
| 2590 | unsigned flag) |
Nicolas Pitre | ac93910 | 2008-07-14 21:46:48 -0400 | [diff] [blame] | 2591 | { |
Junio C Hamano | 3ba7a06 | 2010-10-28 11:13:06 -0700 | [diff] [blame] | 2592 | void *data; |
Ævar Arnfjörð Bjarmason | e8b15e6 | 2010-06-10 12:47:01 +0000 | [diff] [blame] | 2593 | char *path; |
Junio C Hamano | b6c4cec | 2010-10-28 11:13:06 -0700 | [diff] [blame] | 2594 | const struct packed_git *p; |
Junio C Hamano | 5bf29b9 | 2011-05-15 12:54:54 -0700 | [diff] [blame] | 2595 | const unsigned char *repl = (flag & READ_SHA1_FILE_REPLACE) |
| 2596 | ? lookup_replace_object(sha1) : sha1; |
Junio C Hamano | b6c4cec | 2010-10-28 11:13:06 -0700 | [diff] [blame] | 2597 | |
Junio C Hamano | 3ba7a06 | 2010-10-28 11:13:06 -0700 | [diff] [blame] | 2598 | errno = 0; |
| 2599 | data = read_object(repl, type, size); |
Junio C Hamano | 4bbf5a2 | 2011-05-15 12:54:52 -0700 | [diff] [blame] | 2600 | if (data) |
Junio C Hamano | b6c4cec | 2010-10-28 11:13:06 -0700 | [diff] [blame] | 2601 | return data; |
Christian Couder | 6809557 | 2009-01-23 10:06:53 +0100 | [diff] [blame] | 2602 | |
Björn Steinbrink | 25f3af3 | 2011-01-20 21:12:20 +0100 | [diff] [blame] | 2603 | if (errno && errno != ENOENT) |
Junio C Hamano | 3ba7a06 | 2010-10-28 11:13:06 -0700 | [diff] [blame] | 2604 | die_errno("failed to read object %s", sha1_to_hex(sha1)); |
| 2605 | |
Christian Couder | 6809557 | 2009-01-23 10:06:53 +0100 | [diff] [blame] | 2606 | /* die if we replaced an object with one that does not exist */ |
Junio C Hamano | b6c4cec | 2010-10-28 11:13:06 -0700 | [diff] [blame] | 2607 | if (repl != sha1) |
Christian Couder | 6809557 | 2009-01-23 10:06:53 +0100 | [diff] [blame] | 2608 | die("replacement %s not found for %s", |
| 2609 | sha1_to_hex(repl), sha1_to_hex(sha1)); |
| 2610 | |
Junio C Hamano | b6c4cec | 2010-10-28 11:13:06 -0700 | [diff] [blame] | 2611 | if (has_loose_object(repl)) { |
| 2612 | path = sha1_file_name(sha1); |
| 2613 | die("loose object %s (stored in %s) is corrupt", |
| 2614 | sha1_to_hex(repl), path); |
Ævar Arnfjörð Bjarmason | e8b15e6 | 2010-06-10 12:47:01 +0000 | [diff] [blame] | 2615 | } |
Christian Couder | 6809557 | 2009-01-23 10:06:53 +0100 | [diff] [blame] | 2616 | |
Junio C Hamano | b6c4cec | 2010-10-28 11:13:06 -0700 | [diff] [blame] | 2617 | if ((p = has_packed_and_bad(repl)) != NULL) |
| 2618 | die("packed object %s (stored in %s) is corrupt", |
| 2619 | sha1_to_hex(repl), p->pack_name); |
Christian Couder | f5552ae | 2009-01-23 10:07:01 +0100 | [diff] [blame] | 2620 | |
Junio C Hamano | b6c4cec | 2010-10-28 11:13:06 -0700 | [diff] [blame] | 2621 | return NULL; |
Nicolas Pitre | ac93910 | 2008-07-14 21:46:48 -0400 | [diff] [blame] | 2622 | } |
| 2623 | |
Junio C Hamano | 40469ee | 2005-04-28 16:42:27 -0700 | [diff] [blame] | 2624 | void *read_object_with_reference(const unsigned char *sha1, |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 2625 | const char *required_type_name, |
Junio C Hamano | 40469ee | 2005-04-28 16:42:27 -0700 | [diff] [blame] | 2626 | unsigned long *size, |
| 2627 | unsigned char *actual_sha1_return) |
Junio C Hamano | f4913f9 | 2005-04-20 18:06:49 -0700 | [diff] [blame] | 2628 | { |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 2629 | enum object_type type, required_type; |
Junio C Hamano | f4913f9 | 2005-04-20 18:06:49 -0700 | [diff] [blame] | 2630 | void *buffer; |
| 2631 | unsigned long isize; |
Junio C Hamano | 40469ee | 2005-04-28 16:42:27 -0700 | [diff] [blame] | 2632 | unsigned char actual_sha1[20]; |
Junio C Hamano | f4913f9 | 2005-04-20 18:06:49 -0700 | [diff] [blame] | 2633 | |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 2634 | required_type = type_from_string(required_type_name); |
Shawn Pearce | e702496 | 2006-08-23 02:49:00 -0400 | [diff] [blame] | 2635 | hashcpy(actual_sha1, sha1); |
Junio C Hamano | 40469ee | 2005-04-28 16:42:27 -0700 | [diff] [blame] | 2636 | while (1) { |
| 2637 | int ref_length = -1; |
| 2638 | const char *ref_type = NULL; |
Junio C Hamano | f4913f9 | 2005-04-20 18:06:49 -0700 | [diff] [blame] | 2639 | |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 2640 | buffer = read_sha1_file(actual_sha1, &type, &isize); |
Junio C Hamano | 40469ee | 2005-04-28 16:42:27 -0700 | [diff] [blame] | 2641 | if (!buffer) |
| 2642 | return NULL; |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 2643 | if (type == required_type) { |
Junio C Hamano | 40469ee | 2005-04-28 16:42:27 -0700 | [diff] [blame] | 2644 | *size = isize; |
| 2645 | if (actual_sha1_return) |
Shawn Pearce | e702496 | 2006-08-23 02:49:00 -0400 | [diff] [blame] | 2646 | hashcpy(actual_sha1_return, actual_sha1); |
Junio C Hamano | 40469ee | 2005-04-28 16:42:27 -0700 | [diff] [blame] | 2647 | return buffer; |
| 2648 | } |
| 2649 | /* Handle references */ |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 2650 | else if (type == OBJ_COMMIT) |
Junio C Hamano | 40469ee | 2005-04-28 16:42:27 -0700 | [diff] [blame] | 2651 | ref_type = "tree "; |
Nicolas Pitre | 21666f1 | 2007-02-26 14:55:59 -0500 | [diff] [blame] | 2652 | else if (type == OBJ_TAG) |
Junio C Hamano | 40469ee | 2005-04-28 16:42:27 -0700 | [diff] [blame] | 2653 | ref_type = "object "; |
| 2654 | else { |
| 2655 | free(buffer); |
| 2656 | return NULL; |
| 2657 | } |
| 2658 | ref_length = strlen(ref_type); |
| 2659 | |
Martin Koegler | 50974ec | 2008-02-18 21:47:52 +0100 | [diff] [blame] | 2660 | if (ref_length + 40 > isize || |
| 2661 | memcmp(buffer, ref_type, ref_length) || |
Florian Forster | 1d7f171 | 2006-06-18 17:18:09 +0200 | [diff] [blame] | 2662 | get_sha1_hex((char *) buffer + ref_length, actual_sha1)) { |
Junio C Hamano | 40469ee | 2005-04-28 16:42:27 -0700 | [diff] [blame] | 2663 | free(buffer); |
| 2664 | return NULL; |
| 2665 | } |
Sergey Vlasov | 1cf58e7 | 2005-08-08 22:44:43 +0400 | [diff] [blame] | 2666 | free(buffer); |
Junio C Hamano | 40469ee | 2005-04-28 16:42:27 -0700 | [diff] [blame] | 2667 | /* Now we have the ID of the referred-to object in |
| 2668 | * actual_sha1. Check again. */ |
Junio C Hamano | f4913f9 | 2005-04-20 18:06:49 -0700 | [diff] [blame] | 2669 | } |
Junio C Hamano | f4913f9 | 2005-04-20 18:06:49 -0700 | [diff] [blame] | 2670 | } |
| 2671 | |
Nicolas Pitre | ce9fbf1 | 2007-03-20 16:02:09 -0400 | [diff] [blame] | 2672 | static void write_sha1_file_prepare(const void *buf, unsigned long len, |
Rene Scharfe | 972a915 | 2006-10-15 14:02:03 +0200 | [diff] [blame] | 2673 | const char *type, unsigned char *sha1, |
Nicolas Pitre | d65a16f | 2007-02-26 14:55:55 -0500 | [diff] [blame] | 2674 | char *hdr, int *hdrlen) |
Junio C Hamano | d410c0f | 2005-06-27 19:03:13 -0700 | [diff] [blame] | 2675 | { |
Nicolas Pitre | 9126f00 | 2008-10-01 14:05:20 -0400 | [diff] [blame] | 2676 | git_SHA_CTX c; |
Junio C Hamano | d410c0f | 2005-06-27 19:03:13 -0700 | [diff] [blame] | 2677 | |
| 2678 | /* Generate the header */ |
Nicolas Pitre | d65a16f | 2007-02-26 14:55:55 -0500 | [diff] [blame] | 2679 | *hdrlen = sprintf(hdr, "%s %lu", type, len)+1; |
Junio C Hamano | d410c0f | 2005-06-27 19:03:13 -0700 | [diff] [blame] | 2680 | |
| 2681 | /* Sha1.. */ |
Nicolas Pitre | 9126f00 | 2008-10-01 14:05:20 -0400 | [diff] [blame] | 2682 | git_SHA1_Init(&c); |
| 2683 | git_SHA1_Update(&c, hdr, *hdrlen); |
| 2684 | git_SHA1_Update(&c, buf, len); |
| 2685 | git_SHA1_Final(sha1, &c); |
Junio C Hamano | d410c0f | 2005-06-27 19:03:13 -0700 | [diff] [blame] | 2686 | } |
| 2687 | |
Linus Torvalds | 230f132 | 2005-10-08 15:54:01 -0700 | [diff] [blame] | 2688 | /* |
Junio C Hamano | 5a688fe | 2009-03-25 16:19:36 -0700 | [diff] [blame] | 2689 | * Move the just written object into its final resting place. |
| 2690 | * NEEDSWORK: this should be renamed to finalize_temp_file() as |
| 2691 | * "moving" is only a part of what it does, when no patch between |
| 2692 | * master to pu changes the call sites of this function. |
Linus Torvalds | 230f132 | 2005-10-08 15:54:01 -0700 | [diff] [blame] | 2693 | */ |
Junio C Hamano | 839837b | 2006-09-01 00:17:47 -0700 | [diff] [blame] | 2694 | int move_temp_to_file(const char *tmpfile, const char *filename) |
Linus Torvalds | 230f132 | 2005-10-08 15:54:01 -0700 | [diff] [blame] | 2695 | { |
Thomas Rast | e32c0a9 | 2008-09-19 00:24:46 +0200 | [diff] [blame] | 2696 | int ret = 0; |
Junio C Hamano | 5a688fe | 2009-03-25 16:19:36 -0700 | [diff] [blame] | 2697 | |
Johannes Schindelin | 348df16 | 2009-04-28 00:32:25 +0200 | [diff] [blame] | 2698 | if (object_creation_mode == OBJECT_CREATION_USES_RENAMES) |
Johannes Schindelin | be66a6c | 2009-04-25 11:57:14 +0200 | [diff] [blame] | 2699 | goto try_rename; |
| 2700 | else if (link(tmpfile, filename)) |
Thomas Rast | e32c0a9 | 2008-09-19 00:24:46 +0200 | [diff] [blame] | 2701 | ret = errno; |
Linus Torvalds | 7ebb6fc | 2005-10-26 10:27:36 -0700 | [diff] [blame] | 2702 | |
| 2703 | /* |
| 2704 | * Coda hack - coda doesn't like cross-directory links, |
| 2705 | * so we fall back to a rename, which will mean that it |
| 2706 | * won't be able to check collisions, but that's not a |
| 2707 | * big deal. |
| 2708 | * |
| 2709 | * The same holds for FAT formatted media. |
| 2710 | * |
Junio C Hamano | 3be1f18 | 2009-03-27 23:14:39 -0700 | [diff] [blame] | 2711 | * When this succeeds, we just return. We have nothing |
Linus Torvalds | 7ebb6fc | 2005-10-26 10:27:36 -0700 | [diff] [blame] | 2712 | * left to unlink. |
| 2713 | */ |
| 2714 | if (ret && ret != EEXIST) { |
Johannes Schindelin | be66a6c | 2009-04-25 11:57:14 +0200 | [diff] [blame] | 2715 | try_rename: |
Linus Torvalds | 7ebb6fc | 2005-10-26 10:27:36 -0700 | [diff] [blame] | 2716 | if (!rename(tmpfile, filename)) |
Junio C Hamano | 3be1f18 | 2009-03-27 23:14:39 -0700 | [diff] [blame] | 2717 | goto out; |
Johannes Schindelin | 9e48b38 | 2005-10-26 01:41:20 +0200 | [diff] [blame] | 2718 | ret = errno; |
Linus Torvalds | 230f132 | 2005-10-08 15:54:01 -0700 | [diff] [blame] | 2719 | } |
Alex Riesen | 691f1a2 | 2009-04-29 23:22:56 +0200 | [diff] [blame] | 2720 | unlink_or_warn(tmpfile); |
Linus Torvalds | 230f132 | 2005-10-08 15:54:01 -0700 | [diff] [blame] | 2721 | if (ret) { |
| 2722 | if (ret != EEXIST) { |
Pete Wyckoff | 82247e9 | 2012-04-29 20:28:45 -0400 | [diff] [blame] | 2723 | return error("unable to write sha1 filename %s: %s", filename, strerror(ret)); |
Linus Torvalds | 230f132 | 2005-10-08 15:54:01 -0700 | [diff] [blame] | 2724 | } |
| 2725 | /* FIXME!!! Collision check here ? */ |
| 2726 | } |
| 2727 | |
Junio C Hamano | 3be1f18 | 2009-03-27 23:14:39 -0700 | [diff] [blame] | 2728 | out: |
Matthieu Moy | 5256b00 | 2010-02-22 23:32:16 +0100 | [diff] [blame] | 2729 | if (adjust_shared_perm(filename)) |
Junio C Hamano | 5a688fe | 2009-03-25 16:19:36 -0700 | [diff] [blame] | 2730 | return error("unable to set permission to '%s'", filename); |
Linus Torvalds | 230f132 | 2005-10-08 15:54:01 -0700 | [diff] [blame] | 2731 | return 0; |
| 2732 | } |
| 2733 | |
Linus Torvalds | 4d54815 | 2006-05-24 08:30:54 -0700 | [diff] [blame] | 2734 | static int write_buffer(int fd, const void *buf, size_t len) |
| 2735 | { |
Linus Torvalds | d34cf19 | 2007-01-11 20:23:00 -0800 | [diff] [blame] | 2736 | if (write_in_full(fd, buf, len) < 0) |
Andy Whitcroft | 93822c2 | 2007-01-08 15:58:23 +0000 | [diff] [blame] | 2737 | return error("file write error (%s)", strerror(errno)); |
Linus Torvalds | 4d54815 | 2006-05-24 08:30:54 -0700 | [diff] [blame] | 2738 | return 0; |
| 2739 | } |
| 2740 | |
Nicolas Pitre | ce9fbf1 | 2007-03-20 16:02:09 -0400 | [diff] [blame] | 2741 | int hash_sha1_file(const void *buf, unsigned long len, const char *type, |
Rene Scharfe | abdc3fc | 2006-10-14 12:45:36 +0200 | [diff] [blame] | 2742 | unsigned char *sha1) |
| 2743 | { |
Nicolas Pitre | d65a16f | 2007-02-26 14:55:55 -0500 | [diff] [blame] | 2744 | char hdr[32]; |
Rene Scharfe | abdc3fc | 2006-10-14 12:45:36 +0200 | [diff] [blame] | 2745 | int hdrlen; |
| 2746 | write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen); |
| 2747 | return 0; |
| 2748 | } |
| 2749 | |
Linus Torvalds | e9039dd | 2008-06-10 18:47:18 -0700 | [diff] [blame] | 2750 | /* Finalize a file on disk, and close it. */ |
| 2751 | static void close_sha1_file(int fd) |
| 2752 | { |
Linus Torvalds | aafe9fb | 2008-06-18 15:18:44 -0700 | [diff] [blame] | 2753 | if (fsync_object_files) |
| 2754 | fsync_or_die(fd, "sha1 file"); |
Linus Torvalds | e9039dd | 2008-06-10 18:47:18 -0700 | [diff] [blame] | 2755 | if (close(fd) != 0) |
Thomas Rast | d824cbb | 2009-06-27 17:58:46 +0200 | [diff] [blame] | 2756 | die_errno("error when closing sha1 file"); |
Linus Torvalds | e9039dd | 2008-06-10 18:47:18 -0700 | [diff] [blame] | 2757 | } |
| 2758 | |
Linus Torvalds | 5723fe7 | 2008-06-14 10:50:12 -0700 | [diff] [blame] | 2759 | /* Size of directory component, including the ending '/' */ |
| 2760 | static inline int directory_size(const char *filename) |
| 2761 | { |
| 2762 | const char *s = strrchr(filename, '/'); |
| 2763 | if (!s) |
| 2764 | return 0; |
| 2765 | return s - filename + 1; |
| 2766 | } |
| 2767 | |
| 2768 | /* |
| 2769 | * This creates a temporary file in the same directory as the final |
| 2770 | * 'filename' |
| 2771 | * |
| 2772 | * We want to avoid cross-directory filename renames, because those |
| 2773 | * can have problems on various filesystems (FAT, NFS, Coda). |
| 2774 | */ |
| 2775 | static int create_tmpfile(char *buffer, size_t bufsiz, const char *filename) |
| 2776 | { |
| 2777 | int fd, dirlen = directory_size(filename); |
| 2778 | |
| 2779 | if (dirlen + 20 > bufsiz) { |
| 2780 | errno = ENAMETOOLONG; |
| 2781 | return -1; |
| 2782 | } |
| 2783 | memcpy(buffer, filename, dirlen); |
| 2784 | strcpy(buffer + dirlen, "tmp_obj_XXXXXX"); |
Matthieu Moy | 5256b00 | 2010-02-22 23:32:16 +0100 | [diff] [blame] | 2785 | fd = git_mkstemp_mode(buffer, 0444); |
Joey Hess | cbacbf4 | 2008-11-20 13:56:28 -0500 | [diff] [blame] | 2786 | if (fd < 0 && dirlen && errno == ENOENT) { |
Linus Torvalds | 5723fe7 | 2008-06-14 10:50:12 -0700 | [diff] [blame] | 2787 | /* Make sure the directory exists */ |
Patrick Higgins | 6ff6af6 | 2008-06-23 15:33:41 -0600 | [diff] [blame] | 2788 | memcpy(buffer, filename, dirlen); |
Linus Torvalds | 5723fe7 | 2008-06-14 10:50:12 -0700 | [diff] [blame] | 2789 | buffer[dirlen-1] = 0; |
Junio C Hamano | 3bfaf01 | 2008-06-16 22:02:12 -0700 | [diff] [blame] | 2790 | if (mkdir(buffer, 0777) || adjust_shared_perm(buffer)) |
Linus Torvalds | 5723fe7 | 2008-06-14 10:50:12 -0700 | [diff] [blame] | 2791 | return -1; |
| 2792 | |
| 2793 | /* Try again */ |
| 2794 | strcpy(buffer + dirlen - 1, "/tmp_obj_XXXXXX"); |
Matthieu Moy | 5256b00 | 2010-02-22 23:32:16 +0100 | [diff] [blame] | 2795 | fd = git_mkstemp_mode(buffer, 0444); |
Linus Torvalds | 5723fe7 | 2008-06-14 10:50:12 -0700 | [diff] [blame] | 2796 | } |
| 2797 | return fd; |
| 2798 | } |
| 2799 | |
Nicolas Pitre | bbac731 | 2008-05-14 01:32:48 -0400 | [diff] [blame] | 2800 | static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen, |
Jeff King | c00e657 | 2010-04-01 20:03:18 -0400 | [diff] [blame] | 2801 | const void *buf, unsigned long len, time_t mtime) |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 2802 | { |
Jeff King | 915308b | 2009-01-29 00:56:34 -0500 | [diff] [blame] | 2803 | int fd, ret; |
Nicolas Pitre | 9892beb | 2010-02-20 23:27:31 -0500 | [diff] [blame] | 2804 | unsigned char compressed[4096]; |
Junio C Hamano | ef49a7a | 2011-06-10 11:52:15 -0700 | [diff] [blame] | 2805 | git_zstream stream; |
Nicolas Pitre | 748af44 | 2010-02-21 15:48:06 -0500 | [diff] [blame] | 2806 | git_SHA_CTX c; |
| 2807 | unsigned char parano_sha1[20]; |
Linus Torvalds | 706bc53 | 2005-04-20 09:28:05 -0700 | [diff] [blame] | 2808 | char *filename; |
Ævar Arnfjörð Bjarmason | ab1900a | 2011-12-21 01:18:21 +0000 | [diff] [blame] | 2809 | static char tmp_file[PATH_MAX]; |
Linus Torvalds | a44c9a5 | 2005-04-25 10:19:53 -0700 | [diff] [blame] | 2810 | |
Rene Scharfe | 972a915 | 2006-10-15 14:02:03 +0200 | [diff] [blame] | 2811 | filename = sha1_file_name(sha1); |
Ævar Arnfjörð Bjarmason | ab1900a | 2011-12-21 01:18:21 +0000 | [diff] [blame] | 2812 | fd = create_tmpfile(tmp_file, sizeof(tmp_file), filename); |
Linus Torvalds | aac1794 | 2005-05-03 11:46:16 -0700 | [diff] [blame] | 2813 | if (fd < 0) { |
Sam Vilain | 3524357 | 2008-11-14 20:19:34 +1300 | [diff] [blame] | 2814 | if (errno == EACCES) |
Pete Wyckoff | 82247e9 | 2012-04-29 20:28:45 -0400 | [diff] [blame] | 2815 | return error("insufficient permission for adding an object to repository database %s", get_object_directory()); |
Petr Baudis | 916d081 | 2006-11-09 13:52:05 +0100 | [diff] [blame] | 2816 | else |
Pete Wyckoff | 5eaeda7 | 2012-04-29 20:28:46 -0400 | [diff] [blame] | 2817 | return error("unable to create temporary file: %s", strerror(errno)); |
Linus Torvalds | aac1794 | 2005-05-03 11:46:16 -0700 | [diff] [blame] | 2818 | } |
| 2819 | |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 2820 | /* Set it up */ |
| 2821 | memset(&stream, 0, sizeof(stream)); |
Junio C Hamano | 55bb5c9 | 2011-06-10 10:55:10 -0700 | [diff] [blame] | 2822 | git_deflate_init(&stream, zlib_compression_level); |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 2823 | stream.next_out = compressed; |
Nicolas Pitre | 9892beb | 2010-02-20 23:27:31 -0500 | [diff] [blame] | 2824 | stream.avail_out = sizeof(compressed); |
Nicolas Pitre | 748af44 | 2010-02-21 15:48:06 -0500 | [diff] [blame] | 2825 | git_SHA1_Init(&c); |
Linus Torvalds | a44c9a5 | 2005-04-25 10:19:53 -0700 | [diff] [blame] | 2826 | |
| 2827 | /* First header.. */ |
Nicolas Pitre | d65a16f | 2007-02-26 14:55:55 -0500 | [diff] [blame] | 2828 | stream.next_in = (unsigned char *)hdr; |
Linus Torvalds | a44c9a5 | 2005-04-25 10:19:53 -0700 | [diff] [blame] | 2829 | stream.avail_in = hdrlen; |
Junio C Hamano | 55bb5c9 | 2011-06-10 10:55:10 -0700 | [diff] [blame] | 2830 | while (git_deflate(&stream, 0) == Z_OK) |
| 2831 | ; /* nothing */ |
Nicolas Pitre | 748af44 | 2010-02-21 15:48:06 -0500 | [diff] [blame] | 2832 | git_SHA1_Update(&c, hdr, hdrlen); |
Linus Torvalds | a44c9a5 | 2005-04-25 10:19:53 -0700 | [diff] [blame] | 2833 | |
| 2834 | /* Then the data itself.. */ |
Jeff King | c00e657 | 2010-04-01 20:03:18 -0400 | [diff] [blame] | 2835 | stream.next_in = (void *)buf; |
Linus Torvalds | a44c9a5 | 2005-04-25 10:19:53 -0700 | [diff] [blame] | 2836 | stream.avail_in = len; |
Nicolas Pitre | 9892beb | 2010-02-20 23:27:31 -0500 | [diff] [blame] | 2837 | do { |
Nicolas Pitre | 748af44 | 2010-02-21 15:48:06 -0500 | [diff] [blame] | 2838 | unsigned char *in0 = stream.next_in; |
Junio C Hamano | 55bb5c9 | 2011-06-10 10:55:10 -0700 | [diff] [blame] | 2839 | ret = git_deflate(&stream, Z_FINISH); |
Nicolas Pitre | 748af44 | 2010-02-21 15:48:06 -0500 | [diff] [blame] | 2840 | git_SHA1_Update(&c, in0, stream.next_in - in0); |
Nicolas Pitre | 9892beb | 2010-02-20 23:27:31 -0500 | [diff] [blame] | 2841 | if (write_buffer(fd, compressed, stream.next_out - compressed) < 0) |
| 2842 | die("unable to write sha1 file"); |
| 2843 | stream.next_out = compressed; |
| 2844 | stream.avail_out = sizeof(compressed); |
| 2845 | } while (ret == Z_OK); |
| 2846 | |
Linus Torvalds | ac54c27 | 2007-03-20 11:38:34 -0700 | [diff] [blame] | 2847 | if (ret != Z_STREAM_END) |
| 2848 | die("unable to deflate new object %s (%d)", sha1_to_hex(sha1), ret); |
Junio C Hamano | 55bb5c9 | 2011-06-10 10:55:10 -0700 | [diff] [blame] | 2849 | ret = git_deflate_end_gently(&stream); |
Linus Torvalds | ac54c27 | 2007-03-20 11:38:34 -0700 | [diff] [blame] | 2850 | if (ret != Z_OK) |
| 2851 | die("deflateEnd on object %s failed (%d)", sha1_to_hex(sha1), ret); |
Nicolas Pitre | 748af44 | 2010-02-21 15:48:06 -0500 | [diff] [blame] | 2852 | git_SHA1_Final(parano_sha1, &c); |
| 2853 | if (hashcmp(sha1, parano_sha1) != 0) |
| 2854 | die("confused by unstable object source data for %s", sha1_to_hex(sha1)); |
Linus Torvalds | ac54c27 | 2007-03-20 11:38:34 -0700 | [diff] [blame] | 2855 | |
Linus Torvalds | e9039dd | 2008-06-10 18:47:18 -0700 | [diff] [blame] | 2856 | close_sha1_file(fd); |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 2857 | |
Nicolas Pitre | bbac731 | 2008-05-14 01:32:48 -0400 | [diff] [blame] | 2858 | if (mtime) { |
| 2859 | struct utimbuf utb; |
| 2860 | utb.actime = mtime; |
| 2861 | utb.modtime = mtime; |
Ævar Arnfjörð Bjarmason | ab1900a | 2011-12-21 01:18:21 +0000 | [diff] [blame] | 2862 | if (utime(tmp_file, &utb) < 0) |
Nicolas Pitre | bbac731 | 2008-05-14 01:32:48 -0400 | [diff] [blame] | 2863 | warning("failed utime() on %s: %s", |
Ævar Arnfjörð Bjarmason | ab1900a | 2011-12-21 01:18:21 +0000 | [diff] [blame] | 2864 | tmp_file, strerror(errno)); |
Nicolas Pitre | bbac731 | 2008-05-14 01:32:48 -0400 | [diff] [blame] | 2865 | } |
| 2866 | |
Ævar Arnfjörð Bjarmason | ab1900a | 2011-12-21 01:18:21 +0000 | [diff] [blame] | 2867 | return move_temp_to_file(tmp_file, filename); |
Linus Torvalds | 0fcfd16 | 2005-04-18 13:04:43 -0700 | [diff] [blame] | 2868 | } |
Daniel Barkalow | 8237b18 | 2005-04-23 18:47:23 -0700 | [diff] [blame] | 2869 | |
Jeff King | c00e657 | 2010-04-01 20:03:18 -0400 | [diff] [blame] | 2870 | int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *returnsha1) |
Nicolas Pitre | bbac731 | 2008-05-14 01:32:48 -0400 | [diff] [blame] | 2871 | { |
| 2872 | unsigned char sha1[20]; |
| 2873 | char hdr[32]; |
| 2874 | int hdrlen; |
| 2875 | |
| 2876 | /* Normally if we have it in the pack then we do not bother writing |
| 2877 | * it out into .git/objects/??/?{38} file. |
| 2878 | */ |
| 2879 | write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen); |
| 2880 | if (returnsha1) |
| 2881 | hashcpy(returnsha1, sha1); |
| 2882 | if (has_sha1_file(sha1)) |
| 2883 | return 0; |
| 2884 | return write_loose_object(sha1, hdr, hdrlen, buf, len, 0); |
| 2885 | } |
| 2886 | |
| 2887 | int force_object_loose(const unsigned char *sha1, time_t mtime) |
| 2888 | { |
Nicolas Pitre | bbac731 | 2008-05-14 01:32:48 -0400 | [diff] [blame] | 2889 | void *buf; |
| 2890 | unsigned long len; |
| 2891 | enum object_type type; |
| 2892 | char hdr[32]; |
| 2893 | int hdrlen; |
Björn Steinbrink | 1fb23e6 | 2008-10-18 02:37:31 +0200 | [diff] [blame] | 2894 | int ret; |
Nicolas Pitre | bbac731 | 2008-05-14 01:32:48 -0400 | [diff] [blame] | 2895 | |
Linus Torvalds | c529d75 | 2008-06-14 11:43:01 -0700 | [diff] [blame] | 2896 | if (has_loose_object(sha1)) |
Nicolas Pitre | bbac731 | 2008-05-14 01:32:48 -0400 | [diff] [blame] | 2897 | return 0; |
| 2898 | buf = read_packed_sha1(sha1, &type, &len); |
| 2899 | if (!buf) |
| 2900 | return error("cannot read sha1_file for %s", sha1_to_hex(sha1)); |
| 2901 | hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1; |
Björn Steinbrink | 1fb23e6 | 2008-10-18 02:37:31 +0200 | [diff] [blame] | 2902 | ret = write_loose_object(sha1, hdr, hdrlen, buf, len, mtime); |
| 2903 | free(buf); |
| 2904 | |
| 2905 | return ret; |
Nicolas Pitre | bbac731 | 2008-05-14 01:32:48 -0400 | [diff] [blame] | 2906 | } |
| 2907 | |
barkalow@iabervon.org | bf592c5 | 2005-07-31 20:53:44 -0400 | [diff] [blame] | 2908 | int has_pack_index(const unsigned char *sha1) |
| 2909 | { |
| 2910 | struct stat st; |
| 2911 | if (stat(sha1_pack_index_name(sha1), &st)) |
| 2912 | return 0; |
| 2913 | return 1; |
| 2914 | } |
| 2915 | |
Junio C Hamano | cd673c1 | 2009-02-27 23:15:53 -0800 | [diff] [blame] | 2916 | int has_sha1_pack(const unsigned char *sha1) |
Linus Torvalds | dade09c | 2005-07-03 13:06:36 -0700 | [diff] [blame] | 2917 | { |
| 2918 | struct pack_entry e; |
Junio C Hamano | cd673c1 | 2009-02-27 23:15:53 -0800 | [diff] [blame] | 2919 | return find_pack_entry(sha1, &e); |
| 2920 | } |
| 2921 | |
Daniel Barkalow | 8237b18 | 2005-04-23 18:47:23 -0700 | [diff] [blame] | 2922 | int has_sha1_file(const unsigned char *sha1) |
| 2923 | { |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2924 | struct pack_entry e; |
| 2925 | |
Junio C Hamano | cd673c1 | 2009-02-27 23:15:53 -0800 | [diff] [blame] | 2926 | if (find_pack_entry(sha1, &e)) |
Junio C Hamano | 1f68855 | 2005-06-27 03:35:33 -0700 | [diff] [blame] | 2927 | return 1; |
Jeff King | 45e8a74 | 2013-08-30 15:14:13 -0400 | [diff] [blame] | 2928 | if (has_loose_object(sha1)) |
| 2929 | return 1; |
| 2930 | reprepare_packed_git(); |
| 2931 | return find_pack_entry(sha1, &e); |
Daniel Barkalow | 8237b18 | 2005-04-23 18:47:23 -0700 | [diff] [blame] | 2932 | } |
Junio C Hamano | 74400e7 | 2005-05-01 23:45:49 -0700 | [diff] [blame] | 2933 | |
Nguyễn Thái Ngọc Duy | c879daa | 2011-02-05 17:52:21 +0700 | [diff] [blame] | 2934 | static void check_tree(const void *buf, size_t size) |
| 2935 | { |
| 2936 | struct tree_desc desc; |
| 2937 | struct name_entry entry; |
| 2938 | |
| 2939 | init_tree_desc(&desc, buf, size); |
| 2940 | while (tree_entry(&desc, &entry)) |
| 2941 | /* do nothing |
| 2942 | * tree_entry() will die() on malformed entries */ |
| 2943 | ; |
| 2944 | } |
| 2945 | |
| 2946 | static void check_commit(const void *buf, size_t size) |
| 2947 | { |
| 2948 | struct commit c; |
| 2949 | memset(&c, 0, sizeof(c)); |
| 2950 | if (parse_commit_buffer(&c, buf, size)) |
| 2951 | die("corrupt commit"); |
| 2952 | } |
| 2953 | |
| 2954 | static void check_tag(const void *buf, size_t size) |
| 2955 | { |
| 2956 | struct tag t; |
| 2957 | memset(&t, 0, sizeof(t)); |
| 2958 | if (parse_tag_buffer(&t, buf, size)) |
| 2959 | die("corrupt tag"); |
| 2960 | } |
| 2961 | |
Dmitry Potapov | 43df4f8 | 2008-08-03 08:39:16 +0400 | [diff] [blame] | 2962 | static int index_mem(unsigned char *sha1, void *buf, size_t size, |
Junio C Hamano | c4ce46f | 2011-05-08 01:47:33 -0700 | [diff] [blame] | 2963 | enum object_type type, |
| 2964 | const char *path, unsigned flags) |
Björn Engelmann | e7332f9 | 2006-05-23 20:19:04 +0200 | [diff] [blame] | 2965 | { |
Linus Torvalds | 6c510be | 2007-02-13 11:07:23 -0800 | [diff] [blame] | 2966 | int ret, re_allocated = 0; |
Junio C Hamano | c4ce46f | 2011-05-08 01:47:33 -0700 | [diff] [blame] | 2967 | int write_object = flags & HASH_WRITE_OBJECT; |
Junio C Hamano | 74400e7 | 2005-05-01 23:45:49 -0700 | [diff] [blame] | 2968 | |
Bryan Larsen | 7672db2 | 2005-07-08 16:51:55 -0700 | [diff] [blame] | 2969 | if (!type) |
Junio C Hamano | edaec3f | 2007-02-28 11:45:56 -0800 | [diff] [blame] | 2970 | type = OBJ_BLOB; |
Linus Torvalds | 6c510be | 2007-02-13 11:07:23 -0800 | [diff] [blame] | 2971 | |
| 2972 | /* |
| 2973 | * Convert blobs to git internal format |
| 2974 | */ |
Dmitry Potapov | 43df4f8 | 2008-08-03 08:39:16 +0400 | [diff] [blame] | 2975 | if ((type == OBJ_BLOB) && path) { |
Brandon Casey | f285a2d | 2008-10-09 14:12:12 -0500 | [diff] [blame] | 2976 | struct strbuf nbuf = STRBUF_INIT; |
Steffen Prohaska | 21e5ad5 | 2008-02-06 12:25:58 +0100 | [diff] [blame] | 2977 | if (convert_to_git(path, buf, size, &nbuf, |
Ramkumar Ramachandra | 5e12e78 | 2011-11-15 22:29:39 +0530 | [diff] [blame] | 2978 | write_object ? safe_crlf : SAFE_CRLF_FALSE)) { |
Pierre Habouzit | b315c5c | 2007-09-27 12:58:23 +0200 | [diff] [blame] | 2979 | buf = strbuf_detach(&nbuf, &size); |
Linus Torvalds | 6c510be | 2007-02-13 11:07:23 -0800 | [diff] [blame] | 2980 | re_allocated = 1; |
| 2981 | } |
| 2982 | } |
Junio C Hamano | c4ce46f | 2011-05-08 01:47:33 -0700 | [diff] [blame] | 2983 | if (flags & HASH_FORMAT_CHECK) { |
Nguyễn Thái Ngọc Duy | c879daa | 2011-02-05 17:52:21 +0700 | [diff] [blame] | 2984 | if (type == OBJ_TREE) |
| 2985 | check_tree(buf, size); |
| 2986 | if (type == OBJ_COMMIT) |
| 2987 | check_commit(buf, size); |
| 2988 | if (type == OBJ_TAG) |
| 2989 | check_tag(buf, size); |
| 2990 | } |
Linus Torvalds | 6c510be | 2007-02-13 11:07:23 -0800 | [diff] [blame] | 2991 | |
Bryan Larsen | 7672db2 | 2005-07-08 16:51:55 -0700 | [diff] [blame] | 2992 | if (write_object) |
Junio C Hamano | edaec3f | 2007-02-28 11:45:56 -0800 | [diff] [blame] | 2993 | ret = write_sha1_file(buf, size, typename(type), sha1); |
Rene Scharfe | abdc3fc | 2006-10-14 12:45:36 +0200 | [diff] [blame] | 2994 | else |
Junio C Hamano | edaec3f | 2007-02-28 11:45:56 -0800 | [diff] [blame] | 2995 | ret = hash_sha1_file(buf, size, typename(type), sha1); |
Dmitry Potapov | 43df4f8 | 2008-08-03 08:39:16 +0400 | [diff] [blame] | 2996 | if (re_allocated) |
Linus Torvalds | 6c510be | 2007-02-13 11:07:23 -0800 | [diff] [blame] | 2997 | free(buf); |
Dmitry Potapov | 43df4f8 | 2008-08-03 08:39:16 +0400 | [diff] [blame] | 2998 | return ret; |
| 2999 | } |
| 3000 | |
Junio C Hamano | 7b41e1e | 2011-05-08 01:47:34 -0700 | [diff] [blame] | 3001 | static int index_pipe(unsigned char *sha1, int fd, enum object_type type, |
| 3002 | const char *path, unsigned flags) |
| 3003 | { |
| 3004 | struct strbuf sbuf = STRBUF_INIT; |
| 3005 | int ret; |
| 3006 | |
| 3007 | if (strbuf_read(&sbuf, fd, 4096) >= 0) |
| 3008 | ret = index_mem(sha1, sbuf.buf, sbuf.len, type, path, flags); |
| 3009 | else |
| 3010 | ret = -1; |
| 3011 | strbuf_release(&sbuf); |
| 3012 | return ret; |
| 3013 | } |
| 3014 | |
Dmitry Potapov | ea68b0c | 2010-02-21 09:32:19 +0300 | [diff] [blame] | 3015 | #define SMALL_FILE_SIZE (32*1024) |
| 3016 | |
Junio C Hamano | 7b41e1e | 2011-05-08 01:47:34 -0700 | [diff] [blame] | 3017 | static int index_core(unsigned char *sha1, int fd, size_t size, |
| 3018 | enum object_type type, const char *path, |
| 3019 | unsigned flags) |
Dmitry Potapov | 43df4f8 | 2008-08-03 08:39:16 +0400 | [diff] [blame] | 3020 | { |
| 3021 | int ret; |
Dmitry Potapov | 43df4f8 | 2008-08-03 08:39:16 +0400 | [diff] [blame] | 3022 | |
Junio C Hamano | 7b41e1e | 2011-05-08 01:47:34 -0700 | [diff] [blame] | 3023 | if (!size) { |
Junio C Hamano | c4ce46f | 2011-05-08 01:47:33 -0700 | [diff] [blame] | 3024 | ret = index_mem(sha1, NULL, size, type, path, flags); |
Dmitry Potapov | ea68b0c | 2010-02-21 09:32:19 +0300 | [diff] [blame] | 3025 | } else if (size <= SMALL_FILE_SIZE) { |
| 3026 | char *buf = xmalloc(size); |
| 3027 | if (size == read_in_full(fd, buf, size)) |
Junio C Hamano | c4ce46f | 2011-05-08 01:47:33 -0700 | [diff] [blame] | 3028 | ret = index_mem(sha1, buf, size, type, path, flags); |
Dmitry Potapov | ea68b0c | 2010-02-21 09:32:19 +0300 | [diff] [blame] | 3029 | else |
| 3030 | ret = error("short read %s", strerror(errno)); |
| 3031 | free(buf); |
Dmitry Potapov | 08bda20 | 2010-05-11 01:38:17 +0400 | [diff] [blame] | 3032 | } else { |
Dmitry Potapov | 43df4f8 | 2008-08-03 08:39:16 +0400 | [diff] [blame] | 3033 | void *buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0); |
Junio C Hamano | c4ce46f | 2011-05-08 01:47:33 -0700 | [diff] [blame] | 3034 | ret = index_mem(sha1, buf, size, type, path, flags); |
Linus Torvalds | aac1794 | 2005-05-03 11:46:16 -0700 | [diff] [blame] | 3035 | munmap(buf, size); |
Dmitry Potapov | 08bda20 | 2010-05-11 01:38:17 +0400 | [diff] [blame] | 3036 | } |
Junio C Hamano | 7b41e1e | 2011-05-08 01:47:34 -0700 | [diff] [blame] | 3037 | return ret; |
| 3038 | } |
| 3039 | |
Junio C Hamano | 4dd1fbc | 2011-05-08 01:47:35 -0700 | [diff] [blame] | 3040 | /* |
Junio C Hamano | 568508e | 2011-10-28 14:48:40 -0700 | [diff] [blame] | 3041 | * This creates one packfile per large blob unless bulk-checkin |
| 3042 | * machinery is "plugged". |
Junio C Hamano | 4dd1fbc | 2011-05-08 01:47:35 -0700 | [diff] [blame] | 3043 | * |
| 3044 | * This also bypasses the usual "convert-to-git" dance, and that is on |
| 3045 | * purpose. We could write a streaming version of the converting |
| 3046 | * functions and insert that before feeding the data to fast-import |
Jeff King | 4f22b10 | 2012-02-24 17:10:17 -0500 | [diff] [blame] | 3047 | * (or equivalent in-core API described above). However, that is |
| 3048 | * somewhat complicated, as we do not know the size of the filter |
| 3049 | * result, which we need to know beforehand when writing a git object. |
| 3050 | * Since the primary motivation for trying to stream from the working |
| 3051 | * tree file and to avoid mmaping it in core is to deal with large |
| 3052 | * binary blobs, they generally do not want to get any conversion, and |
| 3053 | * callers should avoid this code path when filters are requested. |
Junio C Hamano | 4dd1fbc | 2011-05-08 01:47:35 -0700 | [diff] [blame] | 3054 | */ |
| 3055 | static int index_stream(unsigned char *sha1, int fd, size_t size, |
| 3056 | enum object_type type, const char *path, |
| 3057 | unsigned flags) |
| 3058 | { |
Junio C Hamano | 568508e | 2011-10-28 14:48:40 -0700 | [diff] [blame] | 3059 | return index_bulk_checkin(sha1, fd, size, type, path, flags); |
Junio C Hamano | 4dd1fbc | 2011-05-08 01:47:35 -0700 | [diff] [blame] | 3060 | } |
| 3061 | |
Junio C Hamano | 7b41e1e | 2011-05-08 01:47:34 -0700 | [diff] [blame] | 3062 | int index_fd(unsigned char *sha1, int fd, struct stat *st, |
| 3063 | enum object_type type, const char *path, unsigned flags) |
| 3064 | { |
| 3065 | int ret; |
| 3066 | size_t size = xsize_t(st->st_size); |
| 3067 | |
| 3068 | if (!S_ISREG(st->st_mode)) |
| 3069 | ret = index_pipe(sha1, fd, type, path, flags); |
Jeff King | 4f22b10 | 2012-02-24 17:10:17 -0500 | [diff] [blame] | 3070 | else if (size <= big_file_threshold || type != OBJ_BLOB || |
| 3071 | (path && would_convert_to_git(path, NULL, 0, 0))) |
Junio C Hamano | 7b41e1e | 2011-05-08 01:47:34 -0700 | [diff] [blame] | 3072 | ret = index_core(sha1, fd, size, type, path, flags); |
Junio C Hamano | 4dd1fbc | 2011-05-08 01:47:35 -0700 | [diff] [blame] | 3073 | else |
| 3074 | ret = index_stream(sha1, fd, size, type, path, flags); |
Dmitry Potapov | 43df4f8 | 2008-08-03 08:39:16 +0400 | [diff] [blame] | 3075 | close(fd); |
Linus Torvalds | aac1794 | 2005-05-03 11:46:16 -0700 | [diff] [blame] | 3076 | return ret; |
Junio C Hamano | 74400e7 | 2005-05-01 23:45:49 -0700 | [diff] [blame] | 3077 | } |
Junio C Hamano | ec1fcc1 | 2005-10-07 03:42:00 -0700 | [diff] [blame] | 3078 | |
Junio C Hamano | c4ce46f | 2011-05-08 01:47:33 -0700 | [diff] [blame] | 3079 | int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags) |
Junio C Hamano | ec1fcc1 | 2005-10-07 03:42:00 -0700 | [diff] [blame] | 3080 | { |
| 3081 | int fd; |
Linus Torvalds | b760d3a | 2008-12-17 09:51:53 -0800 | [diff] [blame] | 3082 | struct strbuf sb = STRBUF_INIT; |
Junio C Hamano | ec1fcc1 | 2005-10-07 03:42:00 -0700 | [diff] [blame] | 3083 | |
| 3084 | switch (st->st_mode & S_IFMT) { |
| 3085 | case S_IFREG: |
| 3086 | fd = open(path, O_RDONLY); |
| 3087 | if (fd < 0) |
| 3088 | return error("open(\"%s\"): %s", path, |
| 3089 | strerror(errno)); |
Junio C Hamano | c4ce46f | 2011-05-08 01:47:33 -0700 | [diff] [blame] | 3090 | if (index_fd(sha1, fd, st, OBJ_BLOB, path, flags) < 0) |
Junio C Hamano | ec1fcc1 | 2005-10-07 03:42:00 -0700 | [diff] [blame] | 3091 | return error("%s: failed to insert into database", |
| 3092 | path); |
| 3093 | break; |
| 3094 | case S_IFLNK: |
Linus Torvalds | b760d3a | 2008-12-17 09:51:53 -0800 | [diff] [blame] | 3095 | if (strbuf_readlink(&sb, path, st->st_size)) { |
Junio C Hamano | ec1fcc1 | 2005-10-07 03:42:00 -0700 | [diff] [blame] | 3096 | char *errstr = strerror(errno); |
Junio C Hamano | ec1fcc1 | 2005-10-07 03:42:00 -0700 | [diff] [blame] | 3097 | return error("readlink(\"%s\"): %s", path, |
| 3098 | errstr); |
| 3099 | } |
Junio C Hamano | c4ce46f | 2011-05-08 01:47:33 -0700 | [diff] [blame] | 3100 | if (!(flags & HASH_WRITE_OBJECT)) |
Linus Torvalds | b760d3a | 2008-12-17 09:51:53 -0800 | [diff] [blame] | 3101 | hash_sha1_file(sb.buf, sb.len, blob_type, sha1); |
| 3102 | else if (write_sha1_file(sb.buf, sb.len, blob_type, sha1)) |
Junio C Hamano | ec1fcc1 | 2005-10-07 03:42:00 -0700 | [diff] [blame] | 3103 | return error("%s: failed to insert into database", |
| 3104 | path); |
Linus Torvalds | b760d3a | 2008-12-17 09:51:53 -0800 | [diff] [blame] | 3105 | strbuf_release(&sb); |
Junio C Hamano | ec1fcc1 | 2005-10-07 03:42:00 -0700 | [diff] [blame] | 3106 | break; |
Linus Torvalds | f35a6d3 | 2007-04-09 21:20:29 -0700 | [diff] [blame] | 3107 | case S_IFDIR: |
| 3108 | return resolve_gitlink_ref(path, "HEAD", sha1); |
Junio C Hamano | ec1fcc1 | 2005-10-07 03:42:00 -0700 | [diff] [blame] | 3109 | default: |
| 3110 | return error("%s: unsupported file type", path); |
| 3111 | } |
| 3112 | return 0; |
| 3113 | } |
Junio C Hamano | a69e542 | 2007-01-22 21:55:18 -0800 | [diff] [blame] | 3114 | |
| 3115 | int read_pack_header(int fd, struct pack_header *header) |
| 3116 | { |
Heikki Orsila | c697ad1 | 2008-05-03 16:27:26 +0300 | [diff] [blame] | 3117 | if (read_in_full(fd, header, sizeof(*header)) < sizeof(*header)) |
| 3118 | /* "eof before pack header was fully read" */ |
| 3119 | return PH_ERROR_EOF; |
| 3120 | |
Junio C Hamano | a69e542 | 2007-01-22 21:55:18 -0800 | [diff] [blame] | 3121 | if (header->hdr_signature != htonl(PACK_SIGNATURE)) |
| 3122 | /* "protocol error (pack signature mismatch detected)" */ |
| 3123 | return PH_ERROR_PACK_SIGNATURE; |
| 3124 | if (!pack_version_ok(header->hdr_version)) |
| 3125 | /* "protocol error (pack version unsupported)" */ |
| 3126 | return PH_ERROR_PROTOCOL; |
| 3127 | return 0; |
| 3128 | } |
Jeff King | 40d52ff | 2010-04-01 20:05:23 -0400 | [diff] [blame] | 3129 | |
| 3130 | void assert_sha1_type(const unsigned char *sha1, enum object_type expect) |
| 3131 | { |
| 3132 | enum object_type type = sha1_object_info(sha1, NULL); |
| 3133 | if (type < 0) |
| 3134 | die("%s is not a valid object", sha1_to_hex(sha1)); |
| 3135 | if (type != expect) |
| 3136 | die("%s is not a valid '%s' object", sha1_to_hex(sha1), |
| 3137 | typename(expect)); |
| 3138 | } |