*/
#include "cache.h"
#include "string-list.h"
+#include "lockfile.h"
#include "delta.h"
#include "pack.h"
#include "blob.h"
const unsigned char null_sha1[20];
-static const char *no_log_pack_access = "no_log_pack_access";
-static const char *log_pack_access;
-
/*
* This is meant to hold a *small* number of objects that you would
* want read_sha1_file() to be able to return, but yet you do not want
* SHA1, an extra slash for the first level indirection, and the
* terminating NUL.
*/
-static int link_alt_odb_entry(const char *entry, const char *relative_base, int depth)
+static int link_alt_odb_entry(const char *entry, const char *relative_base,
+ int depth, const char *normalized_objdir)
{
- const char *objdir = get_object_directory();
struct alternate_object_database *ent;
struct alternate_object_database *alt;
int pfxlen, entlen;
return -1;
}
}
- if (!strcmp(ent->base, objdir)) {
+ if (!strcmp_icase(ent->base, normalized_objdir)) {
free(ent);
return -1;
}
struct string_list entries = STRING_LIST_INIT_NODUP;
char *alt_copy;
int i;
+ struct strbuf objdirbuf = STRBUF_INIT;
if (depth > 5) {
error("%s: ignoring alternate object stores, nesting too deep.",
return;
}
+ strbuf_add_absolute_path(&objdirbuf, get_object_directory());
+ normalize_path_copy(objdirbuf.buf, objdirbuf.buf);
+
alt_copy = xmemdupz(alt, len);
string_list_split_in_place(&entries, alt_copy, sep, -1);
for (i = 0; i < entries.nr; i++) {
error("%s: ignoring relative alternate object store %s",
relative_base, entry);
} else {
- link_alt_odb_entry(entry, relative_base, depth);
+ link_alt_odb_entry(entry, relative_base, depth, objdirbuf.buf);
}
}
string_list_clear(&entries, 0);
free(alt_copy);
+ strbuf_release(&objdirbuf);
}
void read_info_alternates(const char * relative_base, int depth)
link_alt_odb_entries(alt, strlen(alt), '\n', NULL, 0);
}
-void foreach_alt_odb(alt_odb_fn fn, void *cb)
+int foreach_alt_odb(alt_odb_fn fn, void *cb)
{
struct alternate_object_database *ent;
+ int r = 0;
prepare_alt_odb();
- for (ent = alt_odb_list; ent; ent = ent->next)
- if (fn(ent, cb))
- return;
+ for (ent = alt_odb_list; ent; ent = ent->next) {
+ r = fn(ent, cb);
+ if (r)
+ break;
+ }
+ return r;
}
void prepare_alt_odb(void)
read_info_alternates(get_object_directory(), 0);
}
-static int has_loose_object_local(const unsigned char *sha1)
+static int freshen_file(const char *fn)
{
- return !access(sha1_file_name(sha1), F_OK);
+ struct utimbuf t;
+ t.actime = t.modtime = time(NULL);
+ return !utime(fn, &t);
}
-int has_loose_object_nonlocal(const unsigned char *sha1)
+static int check_and_freshen_file(const char *fn, int freshen)
+{
+ if (access(fn, F_OK))
+ return 0;
+ if (freshen && freshen_file(fn))
+ return 0;
+ return 1;
+}
+
+static int check_and_freshen_local(const unsigned char *sha1, int freshen)
+{
+ return check_and_freshen_file(sha1_file_name(sha1), freshen);
+}
+
+static int check_and_freshen_nonlocal(const unsigned char *sha1, int freshen)
{
struct alternate_object_database *alt;
prepare_alt_odb();
for (alt = alt_odb_list; alt; alt = alt->next) {
fill_sha1_path(alt->name, sha1);
- if (!access(alt->base, F_OK))
+ if (check_and_freshen_file(alt->base, freshen))
return 1;
}
return 0;
}
+static int check_and_freshen(const unsigned char *sha1, int freshen)
+{
+ return check_and_freshen_local(sha1, freshen) ||
+ check_and_freshen_nonlocal(sha1, freshen);
+}
+
+int has_loose_object_nonlocal(const unsigned char *sha1)
+{
+ return check_and_freshen_nonlocal(sha1, 0);
+}
+
static int has_loose_object(const unsigned char *sha1)
{
- return has_loose_object_local(sha1) ||
- has_loose_object_nonlocal(sha1);
+ return check_and_freshen(sha1, 0);
}
static unsigned int pack_used_ctr;
; /* nothing */
}
+static void mmap_limit_check(size_t length)
+{
+ static size_t limit = 0;
+ if (!limit) {
+ limit = git_env_ulong("GIT_MMAP_LIMIT", 0);
+ if (!limit)
+ limit = SIZE_MAX;
+ }
+ if (length > limit)
+ die("attempting to mmap %"PRIuMAX" over limit %"PRIuMAX,
+ (uintmax_t)length, (uintmax_t)limit);
+}
+
void *xmmap(void *start, size_t length,
int prot, int flags, int fd, off_t offset)
{
- void *ret = mmap(start, length, prot, flags, fd, offset);
+ void *ret;
+
+ mmap_limit_check(length);
+ ret = mmap(start, length, prot, flags, fd, offset);
if (ret == MAP_FAILED) {
if (!length)
return NULL;
if (!report_garbage)
return;
- sort_string_list(list);
+ string_list_sort(list);
for (i = 0; i < list->nr; i++) {
const char *path = list->items[i].string;
static void prepare_packed_git_one(char *objdir, int local)
{
- /* Ensure that this buffer is large enough so that we can
- append "/pack/" without clobbering the stack even if
- strlen(objdir) were PATH_MAX. */
- char path[PATH_MAX + 1 + 4 + 1 + 1];
- int len;
+ struct strbuf path = STRBUF_INIT;
+ size_t dirnamelen;
DIR *dir;
struct dirent *de;
struct string_list garbage = STRING_LIST_INIT_DUP;
- sprintf(path, "%s/pack", objdir);
- len = strlen(path);
- dir = opendir(path);
+ strbuf_addstr(&path, objdir);
+ strbuf_addstr(&path, "/pack");
+ dir = opendir(path.buf);
if (!dir) {
if (errno != ENOENT)
error("unable to open object pack directory: %s: %s",
- path, strerror(errno));
+ path.buf, strerror(errno));
+ strbuf_release(&path);
return;
}
- path[len++] = '/';
+ strbuf_addch(&path, '/');
+ dirnamelen = path.len;
while ((de = readdir(dir)) != NULL) {
- int namelen = strlen(de->d_name);
struct packed_git *p;
-
- if (len + namelen + 1 > sizeof(path)) {
- if (report_garbage) {
- struct strbuf sb = STRBUF_INIT;
- strbuf_addf(&sb, "%.*s/%s", len - 1, path, de->d_name);
- report_garbage("path too long", sb.buf);
- strbuf_release(&sb);
- }
- continue;
- }
+ size_t base_len;
if (is_dot_or_dotdot(de->d_name))
continue;
- strcpy(path + len, de->d_name);
+ strbuf_setlen(&path, dirnamelen);
+ strbuf_addstr(&path, de->d_name);
- if (has_extension(de->d_name, ".idx")) {
+ base_len = path.len;
+ if (strip_suffix_mem(path.buf, &base_len, ".idx")) {
/* Don't reopen a pack we already have. */
for (p = packed_git; p; p = p->next) {
- if (!memcmp(path, p->pack_name, len + namelen - 4))
+ size_t len;
+ if (strip_suffix(p->pack_name, ".pack", &len) &&
+ len == base_len &&
+ !memcmp(p->pack_name, path.buf, len))
break;
}
if (p == NULL &&
* See if it really is a valid .idx file with
* corresponding .pack file that we can map.
*/
- (p = add_packed_git(path, len + namelen, local)) != NULL)
+ (p = add_packed_git(path.buf, path.len, local)) != NULL)
install_packed_git(p);
}
if (!report_garbage)
continue;
- 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);
+ if (ends_with(de->d_name, ".idx") ||
+ ends_with(de->d_name, ".pack") ||
+ ends_with(de->d_name, ".bitmap") ||
+ ends_with(de->d_name, ".keep"))
+ string_list_append(&garbage, path.buf);
else
- report_garbage("garbage found", path);
+ report_garbage("garbage found", path.buf);
}
closedir(dir);
report_pack_garbage(&garbage);
string_list_clear(&garbage, 0);
+ strbuf_release(&path);
}
static int sort_pack(const void *a_, const void *b_)
git_zstream stream;
unsigned char *buffer, *in;
- buffer = xmallocz(size);
+ buffer = xmallocz_gently(size);
+ if (!buffer)
+ return NULL;
memset(&stream, 0, sizeof(stream));
stream.next_out = buffer;
stream.avail_out = size + 1;
static void write_pack_access_log(struct packed_git *p, off_t obj_offset)
{
- static FILE *log_file;
-
- if (!log_pack_access)
- log_pack_access = getenv("GIT_TRACE_PACK_ACCESS");
- if (!log_pack_access)
- log_pack_access = no_log_pack_access;
- if (log_pack_access == no_log_pack_access)
- return;
-
- if (!log_file) {
- log_file = fopen(log_pack_access, "w");
- if (!log_file) {
- error("cannot open pack access log '%s' for writing: %s",
- log_pack_access, strerror(errno));
- log_pack_access = no_log_pack_access;
- return;
- }
- }
- fprintf(log_file, "%s %"PRIuMAX"\n",
- p->pack_name, (uintmax_t)obj_offset);
- fflush(log_file);
+ static struct trace_key pack_access = TRACE_KEY_INIT(PACK_ACCESS);
+ trace_printf_key(&pack_access, "%s %"PRIuMAX"\n",
+ p->pack_name, (uintmax_t)obj_offset);
}
int do_check_packed_object_crc;
int delta_stack_nr = 0, delta_stack_alloc = UNPACK_ENTRY_STACK_PREALLOC;
int base_from_cache = 0;
- if (log_pack_access != no_log_pack_access)
- write_pack_access_log(p, obj_offset);
+ write_pack_access_log(p, obj_offset);
/* PHASE 1: drill down to the innermost base object */
for (;;) {
* answer, as it may have been deleted since the index was
* loaded!
*/
- if (!is_pack_valid(p)) {
- warning("packfile %s cannot be accessed", p->pack_name);
+ if (!is_pack_valid(p))
return 0;
- }
e->offset = offset;
e->p = p;
hashcpy(e->sha1, sha1);
}
/* Set it up */
- memset(&stream, 0, sizeof(stream));
git_deflate_init(&stream, zlib_compression_level);
stream.next_out = compressed;
stream.avail_out = sizeof(compressed);
return move_temp_to_file(tmp_file, filename);
}
-int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *returnsha1)
+static int freshen_loose_object(const unsigned char *sha1)
+{
+ return check_and_freshen(sha1, 1);
+}
+
+static int freshen_packed_object(const unsigned char *sha1)
+{
+ struct pack_entry e;
+ if (!find_pack_entry(sha1, &e))
+ return 0;
+ if (e.p->freshened)
+ return 1;
+ if (!freshen_file(e.p->pack_name))
+ return 0;
+ e.p->freshened = 1;
+ return 1;
+}
+
+int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1)
{
- unsigned char sha1[20];
char hdr[32];
int hdrlen;
* it out into .git/objects/??/?{38} file.
*/
write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen);
- if (returnsha1)
- hashcpy(returnsha1, sha1);
- if (has_sha1_file(sha1))
+ if (freshen_packed_object(sha1) || freshen_loose_object(sha1))
return 0;
return write_loose_object(sha1, hdr, hdrlen, buf, len, 0);
}
+int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type,
+ unsigned char *sha1, unsigned flags)
+{
+ char *header;
+ int hdrlen, status = 0;
+
+ /* type string, SP, %lu of the length plus NUL must fit this */
+ header = xmalloc(strlen(type) + 32);
+ write_sha1_file_prepare(buf, len, type, sha1, header, &hdrlen);
+
+ if (!(flags & HASH_WRITE_OBJECT))
+ goto cleanup;
+ if (freshen_packed_object(sha1) || freshen_loose_object(sha1))
+ goto cleanup;
+ status = write_loose_object(sha1, header, hdrlen, buf, len, 0);
+
+cleanup:
+ free(header);
+ return status;
+}
+
int force_object_loose(const unsigned char *sha1, time_t mtime)
{
void *buf;
return ret;
}
+static int index_stream_convert_blob(unsigned char *sha1, int fd,
+ const char *path, unsigned flags)
+{
+ int ret;
+ const int write_object = flags & HASH_WRITE_OBJECT;
+ struct strbuf sbuf = STRBUF_INIT;
+
+ assert(path);
+ assert(would_convert_to_git_filter_fd(path));
+
+ convert_to_git_filter_fd(path, fd, &sbuf,
+ write_object ? safe_crlf : SAFE_CRLF_FALSE);
+
+ if (write_object)
+ ret = write_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
+ sha1);
+ else
+ ret = hash_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
+ sha1);
+ strbuf_release(&sbuf);
+ return ret;
+}
+
static int index_pipe(unsigned char *sha1, int fd, enum object_type type,
const char *path, unsigned flags)
{
int ret;
if (!size) {
- ret = index_mem(sha1, NULL, size, type, path, flags);
+ ret = index_mem(sha1, "", size, type, path, flags);
} else if (size <= SMALL_FILE_SIZE) {
char *buf = xmalloc(size);
if (size == read_in_full(fd, buf, size))
enum object_type type, const char *path, unsigned flags)
{
int ret;
- size_t size = xsize_t(st->st_size);
- if (!S_ISREG(st->st_mode))
+ /*
+ * Call xsize_t() only when needed to avoid potentially unnecessary
+ * die() for large files.
+ */
+ if (type == OBJ_BLOB && path && would_convert_to_git_filter_fd(path))
+ ret = index_stream_convert_blob(sha1, fd, path, flags);
+ else if (!S_ISREG(st->st_mode))
ret = index_pipe(sha1, fd, type, path, flags);
- else if (size <= big_file_threshold || type != OBJ_BLOB ||
- (path && would_convert_to_git(path, NULL, 0, 0)))
- ret = index_core(sha1, fd, size, type, path, flags);
+ else if (st->st_size <= big_file_threshold || type != OBJ_BLOB ||
+ (path && would_convert_to_git(path)))
+ ret = index_core(sha1, fd, xsize_t(st->st_size), type, path,
+ flags);
else
- ret = index_stream(sha1, fd, size, type, path, flags);
+ ret = index_stream(sha1, fd, xsize_t(st->st_size), type, path,
+ flags);
close(fd);
return ret;
}
die("%s is not a valid '%s' object", sha1_to_hex(sha1),
typename(expect));
}
+
+static int for_each_file_in_obj_subdir(int subdir_nr,
+ struct strbuf *path,
+ each_loose_object_fn obj_cb,
+ each_loose_cruft_fn cruft_cb,
+ each_loose_subdir_fn subdir_cb,
+ void *data)
+{
+ size_t baselen = path->len;
+ DIR *dir = opendir(path->buf);
+ struct dirent *de;
+ int r = 0;
+
+ if (!dir) {
+ if (errno == ENOENT)
+ return 0;
+ return error("unable to open %s: %s", path->buf, strerror(errno));
+ }
+
+ while ((de = readdir(dir))) {
+ if (is_dot_or_dotdot(de->d_name))
+ continue;
+
+ strbuf_setlen(path, baselen);
+ strbuf_addf(path, "/%s", de->d_name);
+
+ if (strlen(de->d_name) == 38) {
+ char hex[41];
+ unsigned char sha1[20];
+
+ snprintf(hex, sizeof(hex), "%02x%s",
+ subdir_nr, de->d_name);
+ if (!get_sha1_hex(hex, sha1)) {
+ if (obj_cb) {
+ r = obj_cb(sha1, path->buf, data);
+ if (r)
+ break;
+ }
+ continue;
+ }
+ }
+
+ if (cruft_cb) {
+ r = cruft_cb(de->d_name, path->buf, data);
+ if (r)
+ break;
+ }
+ }
+ strbuf_setlen(path, baselen);
+
+ if (!r && subdir_cb)
+ r = subdir_cb(subdir_nr, path->buf, data);
+
+ closedir(dir);
+ return r;
+}
+
+int for_each_loose_file_in_objdir_buf(struct strbuf *path,
+ each_loose_object_fn obj_cb,
+ each_loose_cruft_fn cruft_cb,
+ each_loose_subdir_fn subdir_cb,
+ void *data)
+{
+ size_t baselen = path->len;
+ int r = 0;
+ int i;
+
+ for (i = 0; i < 256; i++) {
+ strbuf_addf(path, "/%02x", i);
+ r = for_each_file_in_obj_subdir(i, path, obj_cb, cruft_cb,
+ subdir_cb, data);
+ strbuf_setlen(path, baselen);
+ if (r)
+ break;
+ }
+
+ return r;
+}
+
+int for_each_loose_file_in_objdir(const char *path,
+ each_loose_object_fn obj_cb,
+ each_loose_cruft_fn cruft_cb,
+ each_loose_subdir_fn subdir_cb,
+ void *data)
+{
+ struct strbuf buf = STRBUF_INIT;
+ int r;
+
+ strbuf_addstr(&buf, path);
+ r = for_each_loose_file_in_objdir_buf(&buf, obj_cb, cruft_cb,
+ subdir_cb, data);
+ strbuf_release(&buf);
+
+ return r;
+}
+
+struct loose_alt_odb_data {
+ each_loose_object_fn *cb;
+ void *data;
+};
+
+static int loose_from_alt_odb(struct alternate_object_database *alt,
+ void *vdata)
+{
+ struct loose_alt_odb_data *data = vdata;
+ struct strbuf buf = STRBUF_INIT;
+ int r;
+
+ /* copy base not including trailing '/' */
+ strbuf_add(&buf, alt->base, alt->name - alt->base - 1);
+ r = for_each_loose_file_in_objdir_buf(&buf,
+ data->cb, NULL, NULL,
+ data->data);
+ strbuf_release(&buf);
+ return r;
+}
+
+int for_each_loose_object(each_loose_object_fn cb, void *data, unsigned flags)
+{
+ struct loose_alt_odb_data alt;
+ int r;
+
+ r = for_each_loose_file_in_objdir(get_object_directory(),
+ cb, NULL, NULL, data);
+ if (r)
+ return r;
+
+ if (flags & FOR_EACH_OBJECT_LOCAL_ONLY)
+ return 0;
+
+ alt.cb = cb;
+ alt.data = data;
+ return foreach_alt_odb(loose_from_alt_odb, &alt);
+}
+
+static int for_each_object_in_pack(struct packed_git *p, each_packed_object_fn cb, void *data)
+{
+ uint32_t i;
+ int r = 0;
+
+ for (i = 0; i < p->num_objects; i++) {
+ const unsigned char *sha1 = nth_packed_object_sha1(p, i);
+
+ if (!sha1)
+ return error("unable to get sha1 of object %u in %s",
+ i, p->pack_name);
+
+ r = cb(sha1, p, i, data);
+ if (r)
+ break;
+ }
+ return r;
+}
+
+int for_each_packed_object(each_packed_object_fn cb, void *data, unsigned flags)
+{
+ struct packed_git *p;
+ int r = 0;
+
+ prepare_packed_git();
+ for (p = packed_git; p; p = p->next) {
+ if ((flags & FOR_EACH_OBJECT_LOCAL_ONLY) && !p->pack_local)
+ continue;
+ r = for_each_object_in_pack(p, cb, data);
+ if (r)
+ break;
+ }
+ return r;
+}