read_info_alternates(get_object_directory(), 0);
}
-static int has_loose_object(const unsigned char *sha1)
+static int has_loose_object_local(const unsigned char *sha1)
{
char *name = sha1_file_name(sha1);
- struct alternate_object_database *alt;
+ return !access(name, F_OK);
+}
- if (!access(name, F_OK))
- return 1;
+int has_loose_object_nonlocal(const unsigned char *sha1)
+{
+ struct alternate_object_database *alt;
prepare_alt_odb();
for (alt = alt_odb_list; alt; alt = alt->next) {
- name = alt->name;
- fill_sha1_path(name, sha1);
+ fill_sha1_path(alt->name, sha1);
if (!access(alt->base, F_OK))
return 1;
}
return 0;
}
+static int has_loose_object(const unsigned char *sha1)
+{
+ return has_loose_object_local(sha1) ||
+ has_loose_object_nonlocal(sha1);
+}
+
static unsigned int pack_used_ctr;
static unsigned int pack_mmap_calls;
static unsigned int peak_pack_open_windows;
}
}
+/*
+ * This is used by git-repack in case a newly created pack happens to
+ * 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
+ * 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().
+ */
+void free_pack_by_name(const char *pack_name)
+{
+ struct packed_git *p, **pp = &packed_git;
+
+ while (*pp) {
+ p = *pp;
+ if (strcmp(pack_name, p->pack_name) == 0) {
+ clear_delta_base_cache();
+ close_pack_windows(p);
+ if (p->pack_fd != -1)
+ close(p->pack_fd);
+ if (p->index_data)
+ munmap((void *)p->index_data, p->index_size);
+ free(p->bad_object_sha1);
+ *pp = p->next;
+ free(p);
+ return;
+ }
+ pp = &p->next;
+ }
+}
+
/*
* Do not call this directly as this leaks p->pack_fd on error return;
* call open_packed_git() instead.
return error("packfile %s index unavailable", p->pack_name);
p->pack_fd = open(p->pack_name, O_RDONLY);
+ while (p->pack_fd < 0 && errno == EMFILE && unuse_one_window(p, -1))
+ p->pack_fd = open(p->pack_name, O_RDONLY);
if (p->pack_fd < 0 || fstat(p->pack_fd, &st))
return -1;
&& (offset + 20) <= (win_off + win->len);
}
-unsigned char* use_pack(struct packed_git *p,
+unsigned char *use_pack(struct packed_git *p,
struct pack_window **w_cursor,
off_t offset,
unsigned int *left)
if (p->pack_fd == -1 && open_packed_git(p))
die("packfile %s cannot be accessed", p->pack_name);
- /* Since packfiles end in a hash of their content and its
+ /* Since packfiles end in a hash of their content and it's
* pointless to ask for an offset into the middle of that
* hash, and the in_window function above wouldn't match
* don't allow an offset too close to the end of the file.
return NULL;
}
memcpy(p->pack_name, path, path_len);
+
+ strcpy(p->pack_name + path_len, ".keep");
+ if (!access(p->pack_name, F_OK))
+ p->pack_keep = 1;
+
strcpy(p->pack_name + path_len, ".pack");
if (stat(p->pack_name, &st) || !S_ISREG(st.st_mode)) {
free(p);
sprintf(path, "%s/pack", objdir);
len = strlen(path);
dir = opendir(path);
+ while (!dir && errno == EMFILE && unuse_one_window(packed_git, -1))
+ dir = opendir(path);
if (!dir) {
if (errno != ENOENT)
error("unable to open object pack directory: %s: %s",
return 0;
}
-unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep)
+unsigned long unpack_object_header_buffer(const unsigned char *buf,
+ unsigned long len, enum object_type *type, unsigned long *sizep)
{
unsigned shift;
- unsigned char c;
- unsigned long size;
+ unsigned long size, c;
unsigned long used = 0;
c = buf[used++];
size = c & 15;
shift = 4;
while (c & 0x80) {
- if (len <= used)
- return 0;
- if (sizeof(long) * 8 <= shift)
+ if (len <= used || bitsizeof(long) <= shift) {
+ error("bad object header");
return 0;
+ }
c = buf[used++];
size += (c & 0x7f) << shift;
shift += 7;
stream->avail_out = bufsiz;
if (legacy_loose_object(map)) {
- inflateInit(stream);
- return inflate(stream, 0);
+ git_inflate_init(stream);
+ return git_inflate(stream, 0);
}
* really worth it and we don't write it any longer. But we
* can still read it.
*/
- used = unpack_object_header_gently(map, mapsize, &type, &size);
+ used = unpack_object_header_buffer(map, mapsize, &type, &size);
if (!used || !valid_loose_object_type[type])
return -1;
map += used;
/* Set up the stream for the rest.. */
stream->next_in = map;
stream->avail_in = mapsize;
- inflateInit(stream);
+ git_inflate_init(stream);
/* And generate the fake traditional header */
stream->total_out = 1 + snprintf(buffer, bufsiz, "%s %lu",
stream->next_out = buf + bytes;
stream->avail_out = size - bytes;
while (status == Z_OK)
- status = inflate(stream, Z_FINISH);
+ status = git_inflate(stream, Z_FINISH);
}
buf[size] = 0;
if (status == Z_STREAM_END && !stream->avail_in) {
- inflateEnd(stream);
+ git_inflate_end(stream);
return buf;
}
stream.next_out = delta_head;
stream.avail_out = sizeof(delta_head);
- inflateInit(&stream);
+ git_inflate_init(&stream);
do {
in = use_pack(p, w_curs, curpos, &stream.avail_in);
stream.next_in = in;
- st = inflate(&stream, Z_FINISH);
+ st = git_inflate(&stream, Z_FINISH);
curpos += stream.next_in - in;
} while ((st == Z_OK || st == Z_BUF_ERROR) &&
stream.total_out < sizeof(delta_head));
- inflateEnd(&stream);
- if ((st != Z_STREAM_END) && stream.total_out != sizeof(delta_head))
- die("delta data unpack-initial failed");
+ git_inflate_end(&stream);
+ if ((st != Z_STREAM_END) && stream.total_out != sizeof(delta_head)) {
+ error("delta data unpack-initial failed");
+ return 0;
+ }
/* Examine the initial part of the delta to figure out
* the result size.
base_offset = (base_offset << 7) + (c & 127);
}
base_offset = delta_obj_offset - base_offset;
- if (base_offset >= delta_obj_offset)
+ if (base_offset <= 0 || base_offset >= delta_obj_offset)
return 0; /* out of bound */
*curpos += used;
} else if (type == OBJ_REF_DELTA) {
off_t base_offset;
base_offset = get_delta_base(p, w_curs, &curpos, type, obj_offset);
+ if (!base_offset)
+ return OBJ_BAD;
type = packed_object_info(p, base_offset, NULL);
+ if (type <= OBJ_NONE) {
+ struct revindex_entry *revidx;
+ const unsigned char *base_sha1;
+ revidx = find_pack_revindex(p, base_offset);
+ if (!revidx)
+ return OBJ_BAD;
+ base_sha1 = nth_packed_object_sha1(p, revidx->nr);
+ mark_bad_packed_object(p, base_sha1);
+ type = sha1_object_info(base_sha1, NULL);
+ if (type <= OBJ_NONE)
+ return OBJ_BAD;
+ }
/* We choose to only get the type of the base object and
* ignore potentially corrupt pack file that expects the delta
* based on a base with a wrong size. This saves tons of
* inflate() calls.
*/
- if (sizep)
+ if (sizep) {
*sizep = get_size_from_delta(p, w_curs, curpos);
+ if (*sizep == 0)
+ type = OBJ_BAD;
+ }
return type;
}
* insane, so we know won't exceed what we have been given.
*/
base = use_pack(p, w_curs, *curpos, &left);
- used = unpack_object_header_gently(base, left, &type, sizep);
- if (!used)
- die("object offset outside of pack file");
- *curpos += used;
+ used = unpack_object_header_buffer(base, left, &type, sizep);
+ if (!used) {
+ type = OBJ_BAD;
+ } else
+ *curpos += used;
return type;
}
*sizep = size;
break;
default:
- die("pack %s contains unknown object type %d",
- p->pack_name, type);
+ error("unknown object type %i at offset %"PRIuMAX" in %s",
+ type, (uintmax_t)obj_offset, p->pack_name);
+ type = OBJ_BAD;
}
unuse_pack(&w_curs);
return type;
stream.next_out = buffer;
stream.avail_out = size;
- inflateInit(&stream);
+ git_inflate_init(&stream);
do {
in = use_pack(p, w_curs, curpos, &stream.avail_in);
stream.next_in = in;
- st = inflate(&stream, Z_FINISH);
+ st = git_inflate(&stream, Z_FINISH);
curpos += stream.next_in - in;
} while (st == Z_OK || st == Z_BUF_ERROR);
- inflateEnd(&stream);
+ git_inflate_end(&stream);
if ((st != Z_STREAM_END) || stream.total_out != size) {
free(buffer);
return NULL;
}
}
+void clear_delta_base_cache(void)
+{
+ unsigned long p;
+ for (p = 0; p < MAX_DELTA_CACHE; p++)
+ release_delta_base_cache(&delta_base_cache[p]);
+}
+
static void add_delta_base_cache(struct packed_git *p, off_t base_offset,
void *base, unsigned long base_size, enum object_type type)
{
delta_base_cache_lru.prev = &ent->lru;
}
+static void *read_object(const unsigned char *sha1, enum object_type *type,
+ unsigned long *size);
+
static void *unpack_delta_entry(struct packed_git *p,
struct pack_window **w_curs,
off_t curpos,
* This is costly but should happen only in the presence
* of a corrupted pack, and is better than failing outright.
*/
- struct revindex_entry *revidx = find_pack_revindex(p, base_offset);
- const unsigned char *base_sha1 =
- nth_packed_object_sha1(p, revidx->nr);
+ struct revindex_entry *revidx;
+ const unsigned char *base_sha1;
+ revidx = find_pack_revindex(p, base_offset);
+ if (!revidx)
+ return NULL;
+ base_sha1 = nth_packed_object_sha1(p, revidx->nr);
error("failed to read delta base object %s"
" at offset %"PRIuMAX" from %s",
sha1_to_hex(base_sha1), (uintmax_t)base_offset,
return result;
}
+int do_check_packed_object_crc;
+
void *unpack_entry(struct packed_git *p, off_t obj_offset,
enum object_type *type, unsigned long *sizep)
{
off_t curpos = obj_offset;
void *data;
+ if (do_check_packed_object_crc && p->index_version > 1) {
+ struct revindex_entry *revidx = find_pack_revindex(p, obj_offset);
+ unsigned long len = revidx[1].offset - obj_offset;
+ if (check_pack_crc(p, &w_curs, obj_offset, len, revidx->nr)) {
+ const unsigned char *sha1 =
+ nth_packed_object_sha1(p, revidx->nr);
+ error("bad packed object CRC for %s",
+ sha1_to_hex(sha1));
+ mark_bad_packed_object(p, sha1);
+ unuse_pack(&w_curs);
+ return NULL;
+ }
+ }
+
*type = unpack_object_header(p, &w_curs, &curpos, sizep);
switch (*type) {
case OBJ_OFS_DELTA:
return 0;
}
-int matches_pack_name(struct packed_git *p, const char *name)
-{
- const char *last_c, *c;
-
- if (!strcmp(p->pack_name, name))
- return 1;
-
- for (c = p->pack_name, last_c = c; *c;)
- if (*c == '/')
- last_c = ++c;
- else
- ++c;
- if (!strcmp(last_c, name))
- return 1;
-
- return 0;
-}
-
-static int find_pack_entry(const unsigned char *sha1, struct pack_entry *e, const char **ignore_packed)
+static int find_pack_entry(const unsigned char *sha1, struct pack_entry *e)
{
static struct packed_git *last_found = (void *)1;
struct packed_git *p;
p = (last_found == (void *)1) ? packed_git : last_found;
do {
- if (ignore_packed) {
- const char **ig;
- for (ig = ignore_packed; *ig; ig++)
- if (matches_pack_name(p, *ig))
- break;
- if (*ig)
- goto next;
- }
-
if (p->num_bad_objects) {
unsigned i;
for (i = 0; i < p->num_bad_objects; i++)
status = error("unable to parse %s header", sha1_to_hex(sha1));
else if (sizep)
*sizep = size;
- inflateEnd(&stream);
+ git_inflate_end(&stream);
munmap(map, mapsize);
return status;
}
struct pack_entry e;
int status;
- if (!find_pack_entry(sha1, &e, NULL)) {
+ if (!find_pack_entry(sha1, &e)) {
/* Most likely it's a loose object. */
status = sha1_loose_object_info(sha1, sizep);
if (status >= 0)
/* Not a loose object; someone else may have just packed it. */
reprepare_packed_git();
- if (!find_pack_entry(sha1, &e, NULL))
+ if (!find_pack_entry(sha1, &e))
return status;
}
- return packed_object_info(e.p, e.offset, sizep);
+
+ status = packed_object_info(e.p, e.offset, sizep);
+ if (status < 0) {
+ mark_bad_packed_object(e.p, sha1);
+ status = sha1_object_info(sha1, sizep);
+ }
+
+ return status;
}
static void *read_packed_sha1(const unsigned char *sha1,
struct pack_entry e;
void *data;
- if (!find_pack_entry(sha1, &e, NULL))
+ if (!find_pack_entry(sha1, &e))
return NULL;
data = cache_or_unpack_entry(e.p, e.offset, size, type, 1);
if (!data) {
static int cached_object_nr, cached_object_alloc;
static struct cached_object empty_tree = {
- /* empty tree sha1: 4b825dc642cb6eb9a060e54bf8d69288fbee4904 */
- "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60"
- "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04",
+ EMPTY_TREE_SHA1_BIN,
OBJ_TREE,
"",
0
return 0;
}
-void *read_object(const unsigned char *sha1, enum object_type *type,
- unsigned long *size)
+static void *read_object(const unsigned char *sha1, enum object_type *type,
+ unsigned long *size)
{
unsigned long mapsize;
void *map, *buf;
}
/*
- * Move the just written object into its final resting place
+ * Move the just written object into its final resting place.
+ * NEEDSWORK: this should be renamed to finalize_temp_file() as
+ * "moving" is only a part of what it does, when no patch between
+ * master to pu changes the call sites of this function.
*/
int move_temp_to_file(const char *tmpfile, const char *filename)
{
int ret = 0;
- if (link(tmpfile, filename))
+
+ if (object_creation_mode == OBJECT_CREATION_USES_RENAMES)
+ goto try_rename;
+ else if (link(tmpfile, filename))
ret = errno;
/*
*
* The same holds for FAT formatted media.
*
- * When this succeeds, we just return 0. We have nothing
+ * When this succeeds, we just return. We have nothing
* left to unlink.
*/
if (ret && ret != EEXIST) {
+ try_rename:
if (!rename(tmpfile, filename))
- return 0;
+ goto out;
ret = errno;
}
- unlink(tmpfile);
+ unlink_or_warn(tmpfile);
if (ret) {
if (ret != EEXIST) {
return error("unable to write sha1 filename %s: %s\n", filename, strerror(ret));
/* FIXME!!! Collision check here ? */
}
+out:
+ if (set_shared_perm(filename, (S_IFREG|0444)))
+ return error("unable to set permission to '%s'", filename);
return 0;
}
{
if (fsync_object_files)
fsync_or_die(fd, "sha1 file");
- fchmod(fd, 0444);
if (close(fd) != 0)
- die("unable to write sha1 file");
+ die_errno("error when closing sha1 file");
}
/* Size of directory component, including the ending '/' */
memcpy(buffer, filename, dirlen);
strcpy(buffer + dirlen, "tmp_obj_XXXXXX");
fd = mkstemp(buffer);
- if (fd < 0 && dirlen) {
+ if (fd < 0 && dirlen && errno == ENOENT) {
/* Make sure the directory exists */
memcpy(buffer, filename, dirlen);
buffer[dirlen-1] = 0;
static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
void *buf, unsigned long len, time_t mtime)
{
- int fd, size, ret;
+ int fd, ret;
+ size_t size;
unsigned char *compressed;
z_stream stream;
char *filename;
filename = sha1_file_name(sha1);
fd = create_tmpfile(tmpfile, sizeof(tmpfile), filename);
+ while (fd < 0 && errno == EMFILE && unuse_one_window(packed_git, -1))
+ fd = create_tmpfile(tmpfile, sizeof(tmpfile), filename);
if (fd < 0) {
- if (errno == EPERM)
+ if (errno == EACCES)
return error("insufficient permission for adding an object to repository database %s\n", get_object_directory());
else
return error("unable to create temporary sha1 filename %s: %s\n", tmpfile, strerror(errno));
return 1;
}
-int has_sha1_pack(const unsigned char *sha1, const char **ignore_packed)
+int has_sha1_pack(const unsigned char *sha1)
{
struct pack_entry e;
- return find_pack_entry(sha1, &e, ignore_packed);
+ return find_pack_entry(sha1, &e);
}
int has_sha1_file(const unsigned char *sha1)
{
struct pack_entry e;
- if (find_pack_entry(sha1, &e, NULL))
+ if (find_pack_entry(sha1, &e))
return 1;
return has_loose_object(sha1);
}
int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object)
{
int fd;
- char *target;
- size_t len;
+ struct strbuf sb = STRBUF_INIT;
switch (st->st_mode & S_IFMT) {
case S_IFREG:
path);
break;
case S_IFLNK:
- len = xsize_t(st->st_size);
- target = xmalloc(len + 1);
- if (readlink(path, target, len + 1) != st->st_size) {
+ if (strbuf_readlink(&sb, path, st->st_size)) {
char *errstr = strerror(errno);
- free(target);
return error("readlink(\"%s\"): %s", path,
errstr);
}
if (!write_object)
- hash_sha1_file(target, len, blob_type, sha1);
- else if (write_sha1_file(target, len, blob_type, sha1))
+ hash_sha1_file(sb.buf, sb.len, blob_type, sha1);
+ else if (write_sha1_file(sb.buf, sb.len, blob_type, sha1))
return error("%s: failed to insert into database",
path);
- free(target);
+ strbuf_release(&sb);
break;
case S_IFDIR:
return resolve_gitlink_ref(path, "HEAD", sha1);