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Diffstat (limited to 'sha1_file.c')
-rw-r--r--sha1_file.c87
1 files changed, 45 insertions, 42 deletions
diff --git a/sha1_file.c b/sha1_file.c
index 6e8c05d108..3e9f55f1bb 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -60,6 +60,12 @@ static struct cached_object empty_tree = {
0
};
+/*
+ * A pointer to the last packed_git in which an object was found.
+ * When an object is sought, we look in this packfile first, because
+ * objects that are looked up at similar times are often in the same
+ * packfile as one another.
+ */
static struct packed_git *last_found_pack;
static struct cached_object *find_cached_object(const unsigned char *sha1)
@@ -178,17 +184,7 @@ static void fill_sha1_path(char *pathbuf, const unsigned char *sha1)
}
}
-/*
- * NOTE! This returns a statically allocated buffer, so you have to be
- * careful about using it. Do an "xstrdup()" if you need to save the
- * filename.
- *
- * Also note that this returns the location for creating. Reading
- * SHA1 file can happen from any alternate directory listed in the
- * DB_ENVIRONMENT environment variable if it is not found in
- * the primary object database.
- */
-char *sha1_file_name(const unsigned char *sha1)
+const char *sha1_file_name(const unsigned char *sha1)
{
static char buf[PATH_MAX];
const char *objdir;
@@ -208,6 +204,11 @@ char *sha1_file_name(const unsigned char *sha1)
return buf;
}
+/*
+ * Return the name of the pack or index file with the specified sha1
+ * in its filename. *base and *name are scratch space that must be
+ * provided by the caller. which should be "pack" or "idx".
+ */
static char *sha1_get_pack_name(const unsigned char *sha1,
char **name, char **base, const char *which)
{
@@ -252,8 +253,6 @@ char *sha1_pack_index_name(const unsigned char *sha1)
struct alternate_object_database *alt_odb_list;
static struct alternate_object_database **alt_odb_tail;
-static int git_open_noatime(const char *name);
-
/*
* Prepare alternate object database registry.
*
@@ -438,8 +437,7 @@ void prepare_alt_odb(void)
static int has_loose_object_local(const unsigned char *sha1)
{
- char *name = sha1_file_name(sha1);
- return !access(name, F_OK);
+ return !access(sha1_file_name(sha1), F_OK);
}
int has_loose_object_nonlocal(const unsigned char *sha1)
@@ -491,7 +489,12 @@ void pack_report(void)
sz_fmt(pack_mapped), sz_fmt(peak_pack_mapped));
}
-static int check_packed_git_idx(const char *path, struct packed_git *p)
+/*
+ * Open and mmap the index file at path, perform a couple of
+ * consistency checks, then record its information to p. Return 0 on
+ * success.
+ */
+static int check_packed_git_idx(const char *path, struct packed_git *p)
{
void *idx_map;
struct pack_idx_header *hdr;
@@ -787,7 +790,7 @@ void close_pack_index(struct packed_git *p)
* contain the same set of objects as an existing one. In that case
* the resulting file might be different even if its name would be the
* same. It is best to close any reference to the old pack before it is
- * replaced on disk. Of course no index pointers nor windows for given pack
+ * replaced on disk. Of course no index pointers or windows for given pack
* must subsist at this point. If ever objects from this pack are requested
* again, the new version of the pack will be reinitialized through
* reprepare_packed_git().
@@ -1123,7 +1126,7 @@ static void report_helper(const struct string_list *list,
const char *msg;
switch (seen_bits) {
case 0:
- msg = "no corresponding .idx nor .pack";
+ msg = "no corresponding .idx or .pack";
break;
case 1:
msg = "no corresponding .idx";
@@ -1232,6 +1235,7 @@ static void prepare_packed_git_one(char *objdir, int local)
if (has_extension(de->d_name, ".idx") ||
has_extension(de->d_name, ".pack") ||
+ has_extension(de->d_name, ".bitmap") ||
has_extension(de->d_name, ".keep"))
string_list_append(&garbage, path);
else
@@ -1316,7 +1320,6 @@ void prepare_packed_git(void)
void reprepare_packed_git(void)
{
- discard_revindex();
prepare_packed_git_run_once = 0;
prepare_packed_git();
}
@@ -1393,7 +1396,7 @@ int check_sha1_signature(const unsigned char *sha1, void *map,
return hashcmp(sha1, real_sha1) ? -1 : 0;
}
-static int git_open_noatime(const char *name)
+int git_open_noatime(const char *name)
{
static int sha1_file_open_flag = O_NOATIME;
@@ -1414,17 +1417,15 @@ static int git_open_noatime(const char *name)
static int stat_sha1_file(const unsigned char *sha1, struct stat *st)
{
- char *name = sha1_file_name(sha1);
struct alternate_object_database *alt;
- if (!lstat(name, st))
+ if (!lstat(sha1_file_name(sha1), st))
return 0;
prepare_alt_odb();
errno = ENOENT;
for (alt = alt_odb_list; alt; alt = alt->next) {
- name = alt->name;
- fill_sha1_path(name, sha1);
+ fill_sha1_path(alt->name, sha1);
if (!lstat(alt->base, st))
return 0;
}
@@ -1435,18 +1436,16 @@ static int stat_sha1_file(const unsigned char *sha1, struct stat *st)
static int open_sha1_file(const unsigned char *sha1)
{
int fd;
- char *name = sha1_file_name(sha1);
struct alternate_object_database *alt;
- fd = git_open_noatime(name);
+ fd = git_open_noatime(sha1_file_name(sha1));
if (fd >= 0)
return fd;
prepare_alt_odb();
errno = ENOENT;
for (alt = alt_odb_list; alt; alt = alt->next) {
- name = alt->name;
- fill_sha1_path(name, sha1);
+ fill_sha1_path(alt->name, sha1);
fd = git_open_noatime(alt->base);
if (fd >= 0)
return fd;
@@ -2289,6 +2288,10 @@ void *unpack_entry(struct packed_git *p, off_t obj_offset,
*final_size = size;
unuse_pack(&w_curs);
+
+ if (delta_stack != small_delta_stack)
+ free(delta_stack);
+
return data;
}
@@ -2448,6 +2451,10 @@ static int fill_pack_entry(const unsigned char *sha1,
return 1;
}
+/*
+ * Iff a pack file contains the object named by sha1, return true and
+ * store its location to e.
+ */
static int find_pack_entry(const unsigned char *sha1, struct pack_entry *e)
{
struct packed_git *p;
@@ -2460,11 +2467,13 @@ static int find_pack_entry(const unsigned char *sha1, struct pack_entry *e)
return 1;
for (p = packed_git; p; p = p->next) {
- if (p == last_found_pack || !fill_pack_entry(sha1, e, p))
- continue;
+ if (p == last_found_pack)
+ continue; /* we already checked this one */
- last_found_pack = p;
- return 1;
+ if (fill_pack_entry(sha1, e, p)) {
+ last_found_pack = p;
+ return 1;
+ }
}
return 0;
}
@@ -2626,12 +2635,7 @@ int pretend_sha1_file(void *buf, unsigned long len, enum object_type type,
hash_sha1_file(buf, len, typename(type), sha1);
if (has_sha1_file(sha1) || find_cached_object(sha1))
return 0;
- if (cached_object_alloc <= cached_object_nr) {
- cached_object_alloc = alloc_nr(cached_object_alloc);
- cached_objects = xrealloc(cached_objects,
- sizeof(*cached_objects) *
- cached_object_alloc);
- }
+ ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc);
co = &cached_objects[cached_object_nr++];
co->size = len;
co->type = type;
@@ -2679,7 +2683,6 @@ void *read_sha1_file_extended(const unsigned char *sha1,
unsigned flag)
{
void *data;
- char *path;
const struct packed_git *p;
const unsigned char *repl = lookup_replace_object_extended(sha1, flag);
@@ -2697,7 +2700,8 @@ void *read_sha1_file_extended(const unsigned char *sha1,
sha1_to_hex(repl), sha1_to_hex(sha1));
if (has_loose_object(repl)) {
- path = sha1_file_name(sha1);
+ const char *path = sha1_file_name(sha1);
+
die("loose object %s (stored in %s) is corrupt",
sha1_to_hex(repl), path);
}
@@ -2895,10 +2899,9 @@ static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
git_zstream stream;
git_SHA_CTX c;
unsigned char parano_sha1[20];
- char *filename;
static char tmp_file[PATH_MAX];
+ const char *filename = sha1_file_name(sha1);
- filename = sha1_file_name(sha1);
fd = create_tmpfile(tmp_file, sizeof(tmp_file), filename);
if (fd < 0) {
if (errno == EACCES)
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 14:40:20 +0000