13 #include "streaming.h"
14 #include "thread-utils.h"
16 #include "object-store.h"
17 #include "promisor-remote.h"
19 static const char index_pack_usage
[] =
20 "git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--verify] [--strict] (<pack-file> | --stdin [--fix-thin] [<pack-file>])";
23 struct pack_idx_entry idx
;
25 unsigned char hdr_size
;
27 signed char real_type
;
36 /* Initialized by make_base(). */
37 struct base_data
*base
;
38 struct object_entry
*obj
;
39 int ref_first
, ref_last
;
40 int ofs_first
, ofs_last
;
42 * Threads should increment retain_data if they are about to call
43 * patch_delta() using this struct's data as a base, and decrement this
44 * when they are done. While retain_data is nonzero, this struct's data
45 * will not be freed even if the delta base cache limit is exceeded.
49 * The number of direct children that have not been fully processed
50 * (entered work_head, entered done_head, left done_head). When this
51 * number reaches zero, this struct base_data can be freed.
53 int children_remaining
;
55 /* Not initialized by make_base(). */
56 struct list_head list
;
62 * Stack of struct base_data that have unprocessed children.
63 * threaded_second_pass() uses this as a source of work (the other being the
66 * Guarded by work_mutex.
68 static LIST_HEAD(work_head
);
71 * Stack of struct base_data that have children, all of whom have been
72 * processed or are being processed, and at least one child is being processed.
73 * These struct base_data must be kept around until the last child is
76 * Guarded by work_mutex.
78 static LIST_HEAD(done_head
);
81 * All threads share one delta base cache.
83 * base_cache_used is guarded by work_mutex, and base_cache_limit is read-only
86 static size_t base_cache_used
;
87 static size_t base_cache_limit
;
94 /* Remember to update object flag allocation in object.h */
95 #define FLAG_LINK (1u<<20)
96 #define FLAG_CHECKED (1u<<21)
98 struct ofs_delta_entry
{
103 struct ref_delta_entry
{
104 struct object_id oid
;
108 static struct object_entry
*objects
;
109 static struct object_stat
*obj_stat
;
110 static struct ofs_delta_entry
*ofs_deltas
;
111 static struct ref_delta_entry
*ref_deltas
;
112 static struct thread_local nothread_data
;
113 static int nr_objects
;
114 static int nr_ofs_deltas
;
115 static int nr_ref_deltas
;
116 static int ref_deltas_alloc
;
117 static int nr_resolved_deltas
;
118 static int nr_threads
;
120 static int from_stdin
;
122 static int do_fsck_object
;
123 static struct fsck_options fsck_options
= FSCK_OPTIONS_STRICT
;
125 static int show_resolving_progress
;
126 static int show_stat
;
127 static int check_self_contained_and_connected
;
129 static struct progress
*progress
;
131 /* We always read in 4kB chunks. */
132 static unsigned char input_buffer
[4096];
133 static unsigned int input_offset
, input_len
;
134 static off_t consumed_bytes
;
135 static off_t max_input_size
;
136 static unsigned deepest_delta
;
137 static git_hash_ctx input_ctx
;
138 static uint32_t input_crc32
;
139 static int input_fd
, output_fd
;
140 static const char *curr_pack
;
142 static struct thread_local
*thread_data
;
143 static int nr_dispatched
;
144 static int threads_active
;
146 static pthread_mutex_t read_mutex
;
147 #define read_lock() lock_mutex(&read_mutex)
148 #define read_unlock() unlock_mutex(&read_mutex)
150 static pthread_mutex_t counter_mutex
;
151 #define counter_lock() lock_mutex(&counter_mutex)
152 #define counter_unlock() unlock_mutex(&counter_mutex)
154 static pthread_mutex_t work_mutex
;
155 #define work_lock() lock_mutex(&work_mutex)
156 #define work_unlock() unlock_mutex(&work_mutex)
158 static pthread_mutex_t deepest_delta_mutex
;
159 #define deepest_delta_lock() lock_mutex(&deepest_delta_mutex)
160 #define deepest_delta_unlock() unlock_mutex(&deepest_delta_mutex)
162 static pthread_key_t key
;
164 static inline void lock_mutex(pthread_mutex_t
*mutex
)
167 pthread_mutex_lock(mutex
);
170 static inline void unlock_mutex(pthread_mutex_t
*mutex
)
173 pthread_mutex_unlock(mutex
);
177 * Mutex and conditional variable can't be statically-initialized on Windows.
179 static void init_thread(void)
182 init_recursive_mutex(&read_mutex
);
183 pthread_mutex_init(&counter_mutex
, NULL
);
184 pthread_mutex_init(&work_mutex
, NULL
);
186 pthread_mutex_init(&deepest_delta_mutex
, NULL
);
187 pthread_key_create(&key
, NULL
);
188 thread_data
= xcalloc(nr_threads
, sizeof(*thread_data
));
189 for (i
= 0; i
< nr_threads
; i
++) {
190 thread_data
[i
].pack_fd
= open(curr_pack
, O_RDONLY
);
191 if (thread_data
[i
].pack_fd
== -1)
192 die_errno(_("unable to open %s"), curr_pack
);
198 static void cleanup_thread(void)
204 pthread_mutex_destroy(&read_mutex
);
205 pthread_mutex_destroy(&counter_mutex
);
206 pthread_mutex_destroy(&work_mutex
);
208 pthread_mutex_destroy(&deepest_delta_mutex
);
209 for (i
= 0; i
< nr_threads
; i
++)
210 close(thread_data
[i
].pack_fd
);
211 pthread_key_delete(key
);
215 static int mark_link(struct object
*obj
, int type
, void *data
, struct fsck_options
*options
)
220 if (type
!= OBJ_ANY
&& obj
->type
!= type
)
221 die(_("object type mismatch at %s"), oid_to_hex(&obj
->oid
));
223 obj
->flags
|= FLAG_LINK
;
227 /* The content of each linked object must have been checked
228 or it must be already present in the object database */
229 static unsigned check_object(struct object
*obj
)
234 if (!(obj
->flags
& FLAG_LINK
))
237 if (!(obj
->flags
& FLAG_CHECKED
)) {
239 int type
= oid_object_info(the_repository
, &obj
->oid
, &size
);
241 die(_("did not receive expected object %s"),
242 oid_to_hex(&obj
->oid
));
243 if (type
!= obj
->type
)
244 die(_("object %s: expected type %s, found %s"),
245 oid_to_hex(&obj
->oid
),
246 type_name(obj
->type
), type_name(type
));
247 obj
->flags
|= FLAG_CHECKED
;
254 static unsigned check_objects(void)
256 unsigned i
, max
, foreign_nr
= 0;
258 max
= get_max_object_index();
261 progress
= start_delayed_progress(_("Checking objects"), max
);
263 for (i
= 0; i
< max
; i
++) {
264 foreign_nr
+= check_object(get_indexed_object(i
));
265 display_progress(progress
, i
+ 1);
268 stop_progress(&progress
);
273 /* Discard current buffer used content. */
274 static void flush(void)
278 write_or_die(output_fd
, input_buffer
, input_offset
);
279 the_hash_algo
->update_fn(&input_ctx
, input_buffer
, input_offset
);
280 memmove(input_buffer
, input_buffer
+ input_offset
, input_len
);
286 * Make sure at least "min" bytes are available in the buffer, and
287 * return the pointer to the buffer.
289 static void *fill(int min
)
291 if (min
<= input_len
)
292 return input_buffer
+ input_offset
;
293 if (min
> sizeof(input_buffer
))
294 die(Q_("cannot fill %d byte",
295 "cannot fill %d bytes",
300 ssize_t ret
= xread(input_fd
, input_buffer
+ input_len
,
301 sizeof(input_buffer
) - input_len
);
305 die_errno(_("read error on input"));
309 display_throughput(progress
, consumed_bytes
+ input_len
);
310 } while (input_len
< min
);
314 static void use(int bytes
)
316 if (bytes
> input_len
)
317 die(_("used more bytes than were available"));
318 input_crc32
= crc32(input_crc32
, input_buffer
+ input_offset
, bytes
);
320 input_offset
+= bytes
;
322 /* make sure off_t is sufficiently large not to wrap */
323 if (signed_add_overflows(consumed_bytes
, bytes
))
324 die(_("pack too large for current definition of off_t"));
325 consumed_bytes
+= bytes
;
326 if (max_input_size
&& consumed_bytes
> max_input_size
)
327 die(_("pack exceeds maximum allowed size"));
330 static const char *open_pack_file(const char *pack_name
)
335 struct strbuf tmp_file
= STRBUF_INIT
;
336 output_fd
= odb_mkstemp(&tmp_file
,
337 "pack/tmp_pack_XXXXXX");
338 pack_name
= strbuf_detach(&tmp_file
, NULL
);
340 output_fd
= open(pack_name
, O_CREAT
|O_EXCL
|O_RDWR
, 0600);
342 die_errno(_("unable to create '%s'"), pack_name
);
344 nothread_data
.pack_fd
= output_fd
;
346 input_fd
= open(pack_name
, O_RDONLY
);
348 die_errno(_("cannot open packfile '%s'"), pack_name
);
350 nothread_data
.pack_fd
= input_fd
;
352 the_hash_algo
->init_fn(&input_ctx
);
356 static void parse_pack_header(void)
358 struct pack_header
*hdr
= fill(sizeof(struct pack_header
));
360 /* Header consistency check */
361 if (hdr
->hdr_signature
!= htonl(PACK_SIGNATURE
))
362 die(_("pack signature mismatch"));
363 if (!pack_version_ok(hdr
->hdr_version
))
364 die(_("pack version %"PRIu32
" unsupported"),
365 ntohl(hdr
->hdr_version
));
367 nr_objects
= ntohl(hdr
->hdr_entries
);
368 use(sizeof(struct pack_header
));
371 static NORETURN
void bad_object(off_t offset
, const char *format
,
372 ...) __attribute__((format (printf
, 2, 3)));
374 static NORETURN
void bad_object(off_t offset
, const char *format
, ...)
379 va_start(params
, format
);
380 vsnprintf(buf
, sizeof(buf
), format
, params
);
382 die(_("pack has bad object at offset %"PRIuMAX
": %s"),
383 (uintmax_t)offset
, buf
);
386 static inline struct thread_local
*get_thread_data(void)
390 return pthread_getspecific(key
);
391 assert(!threads_active
&&
392 "This should only be reached when all threads are gone");
394 return ¬hread_data
;
397 static void set_thread_data(struct thread_local
*data
)
400 pthread_setspecific(key
, data
);
403 static void free_base_data(struct base_data
*c
)
406 FREE_AND_NULL(c
->data
);
407 base_cache_used
-= c
->size
;
411 static void prune_base_data(struct base_data
*retain
)
413 struct list_head
*pos
;
415 if (base_cache_used
<= base_cache_limit
)
418 list_for_each_prev(pos
, &done_head
) {
419 struct base_data
*b
= list_entry(pos
, struct base_data
, list
);
420 if (b
->retain_data
|| b
== retain
)
424 if (base_cache_used
<= base_cache_limit
)
429 list_for_each_prev(pos
, &work_head
) {
430 struct base_data
*b
= list_entry(pos
, struct base_data
, list
);
431 if (b
->retain_data
|| b
== retain
)
435 if (base_cache_used
<= base_cache_limit
)
441 static int is_delta_type(enum object_type type
)
443 return (type
== OBJ_REF_DELTA
|| type
== OBJ_OFS_DELTA
);
446 static void *unpack_entry_data(off_t offset
, unsigned long size
,
447 enum object_type type
, struct object_id
*oid
)
449 static char fixed_buf
[8192];
457 if (!is_delta_type(type
)) {
458 hdrlen
= xsnprintf(hdr
, sizeof(hdr
), "%s %"PRIuMAX
,
459 type_name(type
),(uintmax_t)size
) + 1;
460 the_hash_algo
->init_fn(&c
);
461 the_hash_algo
->update_fn(&c
, hdr
, hdrlen
);
464 if (type
== OBJ_BLOB
&& size
> big_file_threshold
)
467 buf
= xmallocz(size
);
469 memset(&stream
, 0, sizeof(stream
));
470 git_inflate_init(&stream
);
471 stream
.next_out
= buf
;
472 stream
.avail_out
= buf
== fixed_buf
? sizeof(fixed_buf
) : size
;
475 unsigned char *last_out
= stream
.next_out
;
476 stream
.next_in
= fill(1);
477 stream
.avail_in
= input_len
;
478 status
= git_inflate(&stream
, 0);
479 use(input_len
- stream
.avail_in
);
481 the_hash_algo
->update_fn(&c
, last_out
, stream
.next_out
- last_out
);
482 if (buf
== fixed_buf
) {
483 stream
.next_out
= buf
;
484 stream
.avail_out
= sizeof(fixed_buf
);
486 } while (status
== Z_OK
);
487 if (stream
.total_out
!= size
|| status
!= Z_STREAM_END
)
488 bad_object(offset
, _("inflate returned %d"), status
);
489 git_inflate_end(&stream
);
491 the_hash_algo
->final_fn(oid
->hash
, &c
);
492 return buf
== fixed_buf
? NULL
: buf
;
495 static void *unpack_raw_entry(struct object_entry
*obj
,
497 struct object_id
*ref_oid
,
498 struct object_id
*oid
)
501 unsigned long size
, c
;
506 obj
->idx
.offset
= consumed_bytes
;
507 input_crc32
= crc32(0, NULL
, 0);
512 obj
->type
= (c
>> 4) & 7;
519 size
+= (c
& 0x7f) << shift
;
526 hashcpy(ref_oid
->hash
, fill(the_hash_algo
->rawsz
));
527 use(the_hash_algo
->rawsz
);
533 base_offset
= c
& 127;
536 if (!base_offset
|| MSB(base_offset
, 7))
537 bad_object(obj
->idx
.offset
, _("offset value overflow for delta base object"));
541 base_offset
= (base_offset
<< 7) + (c
& 127);
543 *ofs_offset
= obj
->idx
.offset
- base_offset
;
544 if (*ofs_offset
<= 0 || *ofs_offset
>= obj
->idx
.offset
)
545 bad_object(obj
->idx
.offset
, _("delta base offset is out of bound"));
553 bad_object(obj
->idx
.offset
, _("unknown object type %d"), obj
->type
);
555 obj
->hdr_size
= consumed_bytes
- obj
->idx
.offset
;
557 data
= unpack_entry_data(obj
->idx
.offset
, obj
->size
, obj
->type
, oid
);
558 obj
->idx
.crc32
= input_crc32
;
562 static void *unpack_data(struct object_entry
*obj
,
563 int (*consume
)(const unsigned char *, unsigned long, void *),
566 off_t from
= obj
[0].idx
.offset
+ obj
[0].hdr_size
;
567 off_t len
= obj
[1].idx
.offset
- from
;
568 unsigned char *data
, *inbuf
;
572 data
= xmallocz(consume
? 64*1024 : obj
->size
);
573 inbuf
= xmalloc((len
< 64*1024) ? (int)len
: 64*1024);
575 memset(&stream
, 0, sizeof(stream
));
576 git_inflate_init(&stream
);
577 stream
.next_out
= data
;
578 stream
.avail_out
= consume
? 64*1024 : obj
->size
;
581 ssize_t n
= (len
< 64*1024) ? (ssize_t
)len
: 64*1024;
582 n
= xpread(get_thread_data()->pack_fd
, inbuf
, n
, from
);
584 die_errno(_("cannot pread pack file"));
586 die(Q_("premature end of pack file, %"PRIuMAX
" byte missing",
587 "premature end of pack file, %"PRIuMAX
" bytes missing",
592 stream
.next_in
= inbuf
;
595 status
= git_inflate(&stream
, 0);
598 status
= git_inflate(&stream
, 0);
599 if (consume(data
, stream
.next_out
- data
, cb_data
)) {
604 stream
.next_out
= data
;
605 stream
.avail_out
= 64*1024;
606 } while (status
== Z_OK
&& stream
.avail_in
);
608 } while (len
&& status
== Z_OK
&& !stream
.avail_in
);
610 /* This has been inflated OK when first encountered, so... */
611 if (status
!= Z_STREAM_END
|| stream
.total_out
!= obj
->size
)
612 die(_("serious inflate inconsistency"));
614 git_inflate_end(&stream
);
622 static void *get_data_from_pack(struct object_entry
*obj
)
624 return unpack_data(obj
, NULL
, NULL
);
627 static int compare_ofs_delta_bases(off_t offset1
, off_t offset2
,
628 enum object_type type1
,
629 enum object_type type2
)
631 int cmp
= type1
- type2
;
634 return offset1
< offset2
? -1 :
635 offset1
> offset2
? 1 :
639 static int find_ofs_delta(const off_t offset
)
641 int first
= 0, last
= nr_ofs_deltas
;
643 while (first
< last
) {
644 int next
= first
+ (last
- first
) / 2;
645 struct ofs_delta_entry
*delta
= &ofs_deltas
[next
];
648 cmp
= compare_ofs_delta_bases(offset
, delta
->offset
,
650 objects
[delta
->obj_no
].type
);
662 static void find_ofs_delta_children(off_t offset
,
663 int *first_index
, int *last_index
)
665 int first
= find_ofs_delta(offset
);
667 int end
= nr_ofs_deltas
- 1;
674 while (first
> 0 && ofs_deltas
[first
- 1].offset
== offset
)
676 while (last
< end
&& ofs_deltas
[last
+ 1].offset
== offset
)
678 *first_index
= first
;
682 static int compare_ref_delta_bases(const struct object_id
*oid1
,
683 const struct object_id
*oid2
,
684 enum object_type type1
,
685 enum object_type type2
)
687 int cmp
= type1
- type2
;
690 return oidcmp(oid1
, oid2
);
693 static int find_ref_delta(const struct object_id
*oid
)
695 int first
= 0, last
= nr_ref_deltas
;
697 while (first
< last
) {
698 int next
= first
+ (last
- first
) / 2;
699 struct ref_delta_entry
*delta
= &ref_deltas
[next
];
702 cmp
= compare_ref_delta_bases(oid
, &delta
->oid
,
704 objects
[delta
->obj_no
].type
);
716 static void find_ref_delta_children(const struct object_id
*oid
,
717 int *first_index
, int *last_index
)
719 int first
= find_ref_delta(oid
);
721 int end
= nr_ref_deltas
- 1;
728 while (first
> 0 && oideq(&ref_deltas
[first
- 1].oid
, oid
))
730 while (last
< end
&& oideq(&ref_deltas
[last
+ 1].oid
, oid
))
732 *first_index
= first
;
736 struct compare_data
{
737 struct object_entry
*entry
;
738 struct git_istream
*st
;
740 unsigned long buf_size
;
743 static int compare_objects(const unsigned char *buf
, unsigned long size
,
746 struct compare_data
*data
= cb_data
;
748 if (data
->buf_size
< size
) {
750 data
->buf
= xmalloc(size
);
751 data
->buf_size
= size
;
755 ssize_t len
= read_istream(data
->st
, data
->buf
, size
);
757 die(_("SHA1 COLLISION FOUND WITH %s !"),
758 oid_to_hex(&data
->entry
->idx
.oid
));
760 die(_("unable to read %s"),
761 oid_to_hex(&data
->entry
->idx
.oid
));
762 if (memcmp(buf
, data
->buf
, len
))
763 die(_("SHA1 COLLISION FOUND WITH %s !"),
764 oid_to_hex(&data
->entry
->idx
.oid
));
771 static int check_collison(struct object_entry
*entry
)
773 struct compare_data data
;
774 enum object_type type
;
777 if (entry
->size
<= big_file_threshold
|| entry
->type
!= OBJ_BLOB
)
780 memset(&data
, 0, sizeof(data
));
782 data
.st
= open_istream(the_repository
, &entry
->idx
.oid
, &type
, &size
,
786 if (size
!= entry
->size
|| type
!= entry
->type
)
787 die(_("SHA1 COLLISION FOUND WITH %s !"),
788 oid_to_hex(&entry
->idx
.oid
));
789 unpack_data(entry
, compare_objects
, &data
);
790 close_istream(data
.st
);
795 static void sha1_object(const void *data
, struct object_entry
*obj_entry
,
796 unsigned long size
, enum object_type type
,
797 const struct object_id
*oid
)
799 void *new_data
= NULL
;
800 int collision_test_needed
= 0;
802 assert(data
|| obj_entry
);
804 if (startup_info
->have_repository
) {
806 collision_test_needed
=
807 has_object_file_with_flags(oid
, OBJECT_INFO_QUICK
);
811 if (collision_test_needed
&& !data
) {
813 if (!check_collison(obj_entry
))
814 collision_test_needed
= 0;
817 if (collision_test_needed
) {
819 enum object_type has_type
;
820 unsigned long has_size
;
822 has_type
= oid_object_info(the_repository
, oid
, &has_size
);
824 die(_("cannot read existing object info %s"), oid_to_hex(oid
));
825 if (has_type
!= type
|| has_size
!= size
)
826 die(_("SHA1 COLLISION FOUND WITH %s !"), oid_to_hex(oid
));
827 has_data
= read_object_file(oid
, &has_type
, &has_size
);
830 data
= new_data
= get_data_from_pack(obj_entry
);
832 die(_("cannot read existing object %s"), oid_to_hex(oid
));
833 if (size
!= has_size
|| type
!= has_type
||
834 memcmp(data
, has_data
, size
) != 0)
835 die(_("SHA1 COLLISION FOUND WITH %s !"), oid_to_hex(oid
));
839 if (strict
|| do_fsck_object
) {
841 if (type
== OBJ_BLOB
) {
842 struct blob
*blob
= lookup_blob(the_repository
, oid
);
844 blob
->object
.flags
|= FLAG_CHECKED
;
846 die(_("invalid blob object %s"), oid_to_hex(oid
));
847 if (do_fsck_object
&&
848 fsck_object(&blob
->object
, (void *)data
, size
, &fsck_options
))
849 die(_("fsck error in packed object"));
853 void *buf
= (void *) data
;
855 assert(data
&& "data can only be NULL for large _blobs_");
858 * we do not need to free the memory here, as the
859 * buf is deleted by the caller.
861 obj
= parse_object_buffer(the_repository
, oid
, type
,
865 die(_("invalid %s"), type_name(type
));
866 if (do_fsck_object
&&
867 fsck_object(obj
, buf
, size
, &fsck_options
))
868 die(_("fsck error in packed object"));
869 if (strict
&& fsck_walk(obj
, NULL
, &fsck_options
))
870 die(_("Not all child objects of %s are reachable"), oid_to_hex(&obj
->oid
));
872 if (obj
->type
== OBJ_TREE
) {
873 struct tree
*item
= (struct tree
*) obj
;
877 if (obj
->type
== OBJ_COMMIT
) {
878 struct commit
*commit
= (struct commit
*) obj
;
879 if (detach_commit_buffer(commit
, NULL
) != data
)
880 BUG("parse_object_buffer transmogrified our buffer");
882 obj
->flags
|= FLAG_CHECKED
;
891 * Ensure that this node has been reconstructed and return its contents.
893 * In the typical and best case, this node would already be reconstructed
894 * (through the invocation to resolve_delta() in threaded_second_pass()) and it
895 * would not be pruned. However, if pruning of this node was necessary due to
896 * reaching delta_base_cache_limit, this function will find the closest
897 * ancestor with reconstructed data that has not been pruned (or if there is
898 * none, the ultimate base object), and reconstruct each node in the delta
899 * chain in order to generate the reconstructed data for this node.
901 static void *get_base_data(struct base_data
*c
)
904 struct object_entry
*obj
= c
->obj
;
905 struct base_data
**delta
= NULL
;
906 int delta_nr
= 0, delta_alloc
= 0;
908 while (is_delta_type(c
->obj
->type
) && !c
->data
) {
909 ALLOC_GROW(delta
, delta_nr
+ 1, delta_alloc
);
910 delta
[delta_nr
++] = c
;
914 c
->data
= get_data_from_pack(obj
);
916 base_cache_used
+= c
->size
;
919 for (; delta_nr
> 0; delta_nr
--) {
921 c
= delta
[delta_nr
- 1];
923 base
= get_base_data(c
->base
);
924 raw
= get_data_from_pack(obj
);
925 c
->data
= patch_delta(
931 bad_object(obj
->idx
.offset
, _("failed to apply delta"));
932 base_cache_used
+= c
->size
;
940 static struct base_data
*make_base(struct object_entry
*obj
,
941 struct base_data
*parent
)
943 struct base_data
*base
= xcalloc(1, sizeof(struct base_data
));
946 find_ref_delta_children(&obj
->idx
.oid
,
947 &base
->ref_first
, &base
->ref_last
);
948 find_ofs_delta_children(obj
->idx
.offset
,
949 &base
->ofs_first
, &base
->ofs_last
);
950 base
->children_remaining
= base
->ref_last
- base
->ref_first
+
951 base
->ofs_last
- base
->ofs_first
+ 2;
955 static struct base_data
*resolve_delta(struct object_entry
*delta_obj
,
956 struct base_data
*base
)
958 void *delta_data
, *result_data
;
959 struct base_data
*result
;
960 unsigned long result_size
;
963 int i
= delta_obj
- objects
;
964 int j
= base
->obj
- objects
;
965 obj_stat
[i
].delta_depth
= obj_stat
[j
].delta_depth
+ 1;
966 deepest_delta_lock();
967 if (deepest_delta
< obj_stat
[i
].delta_depth
)
968 deepest_delta
= obj_stat
[i
].delta_depth
;
969 deepest_delta_unlock();
970 obj_stat
[i
].base_object_no
= j
;
972 delta_data
= get_data_from_pack(delta_obj
);
974 result_data
= patch_delta(base
->data
, base
->size
,
975 delta_data
, delta_obj
->size
, &result_size
);
978 bad_object(delta_obj
->idx
.offset
, _("failed to apply delta"));
979 hash_object_file(the_hash_algo
, result_data
, result_size
,
980 type_name(delta_obj
->real_type
), &delta_obj
->idx
.oid
);
981 sha1_object(result_data
, NULL
, result_size
, delta_obj
->real_type
,
982 &delta_obj
->idx
.oid
);
984 result
= make_base(delta_obj
, base
);
985 result
->data
= result_data
;
986 result
->size
= result_size
;
989 nr_resolved_deltas
++;
995 static int compare_ofs_delta_entry(const void *a
, const void *b
)
997 const struct ofs_delta_entry
*delta_a
= a
;
998 const struct ofs_delta_entry
*delta_b
= b
;
1000 return delta_a
->offset
< delta_b
->offset
? -1 :
1001 delta_a
->offset
> delta_b
->offset
? 1 :
1005 static int compare_ref_delta_entry(const void *a
, const void *b
)
1007 const struct ref_delta_entry
*delta_a
= a
;
1008 const struct ref_delta_entry
*delta_b
= b
;
1010 return oidcmp(&delta_a
->oid
, &delta_b
->oid
);
1013 static void *threaded_second_pass(void *data
)
1016 set_thread_data(data
);
1018 struct base_data
*parent
= NULL
;
1019 struct object_entry
*child_obj
;
1020 struct base_data
*child
;
1023 display_progress(progress
, nr_resolved_deltas
);
1027 if (list_empty(&work_head
)) {
1029 * Take an object from the object array.
1031 while (nr_dispatched
< nr_objects
&&
1032 is_delta_type(objects
[nr_dispatched
].type
))
1034 if (nr_dispatched
>= nr_objects
) {
1038 child_obj
= &objects
[nr_dispatched
++];
1041 * Peek at the top of the stack, and take a child from
1044 parent
= list_first_entry(&work_head
, struct base_data
,
1047 if (parent
->ref_first
<= parent
->ref_last
) {
1048 int offset
= ref_deltas
[parent
->ref_first
++].obj_no
;
1049 child_obj
= objects
+ offset
;
1050 if (child_obj
->real_type
!= OBJ_REF_DELTA
)
1051 die("REF_DELTA at offset %"PRIuMAX
" already resolved (duplicate base %s?)",
1052 (uintmax_t) child_obj
->idx
.offset
,
1053 oid_to_hex(&parent
->obj
->idx
.oid
));
1054 child_obj
->real_type
= parent
->obj
->real_type
;
1056 child_obj
= objects
+
1057 ofs_deltas
[parent
->ofs_first
++].obj_no
;
1058 assert(child_obj
->real_type
== OBJ_OFS_DELTA
);
1059 child_obj
->real_type
= parent
->obj
->real_type
;
1062 if (parent
->ref_first
> parent
->ref_last
&&
1063 parent
->ofs_first
> parent
->ofs_last
) {
1065 * This parent has run out of children, so move
1068 list_del(&parent
->list
);
1069 list_add(&parent
->list
, &done_head
);
1073 * Ensure that the parent has data, since we will need
1076 * NEEDSWORK: If parent data needs to be reloaded, this
1077 * prolongs the time that the current thread spends in
1078 * the mutex. A mitigating factor is that parent data
1079 * needs to be reloaded only if the delta base cache
1080 * limit is exceeded, so in the typical case, this does
1083 get_base_data(parent
);
1084 parent
->retain_data
++;
1089 child
= resolve_delta(child_obj
, parent
);
1090 if (!child
->children_remaining
)
1091 FREE_AND_NULL(child
->data
);
1093 child
= make_base(child_obj
, NULL
);
1094 if (child
->children_remaining
) {
1096 * Since this child has its own delta children,
1097 * we will need this data in the future.
1098 * Inflate now so that future iterations will
1099 * have access to this object's data while
1100 * outside the work mutex.
1102 child
->data
= get_data_from_pack(child_obj
);
1103 child
->size
= child_obj
->size
;
1109 parent
->retain_data
--;
1112 * This child has its own children, so add it to
1115 list_add(&child
->list
, &work_head
);
1116 base_cache_used
+= child
->size
;
1117 prune_base_data(NULL
);
1120 * This child does not have its own children. It may be
1121 * the last descendant of its ancestors; free those
1124 struct base_data
*p
= parent
;
1127 struct base_data
*next_p
;
1129 p
->children_remaining
--;
1130 if (p
->children_remaining
)
1148 * - find locations of all objects;
1149 * - calculate SHA1 of all non-delta objects;
1150 * - remember base (SHA1 or offset) for all deltas.
1152 static void parse_pack_objects(unsigned char *hash
)
1154 int i
, nr_delays
= 0;
1155 struct ofs_delta_entry
*ofs_delta
= ofs_deltas
;
1156 struct object_id ref_delta_oid
;
1160 progress
= start_progress(
1161 from_stdin
? _("Receiving objects") : _("Indexing objects"),
1163 for (i
= 0; i
< nr_objects
; i
++) {
1164 struct object_entry
*obj
= &objects
[i
];
1165 void *data
= unpack_raw_entry(obj
, &ofs_delta
->offset
,
1168 obj
->real_type
= obj
->type
;
1169 if (obj
->type
== OBJ_OFS_DELTA
) {
1171 ofs_delta
->obj_no
= i
;
1173 } else if (obj
->type
== OBJ_REF_DELTA
) {
1174 ALLOC_GROW(ref_deltas
, nr_ref_deltas
+ 1, ref_deltas_alloc
);
1175 oidcpy(&ref_deltas
[nr_ref_deltas
].oid
, &ref_delta_oid
);
1176 ref_deltas
[nr_ref_deltas
].obj_no
= i
;
1179 /* large blobs, check later */
1180 obj
->real_type
= OBJ_BAD
;
1183 sha1_object(data
, NULL
, obj
->size
, obj
->type
,
1186 display_progress(progress
, i
+1);
1188 objects
[i
].idx
.offset
= consumed_bytes
;
1189 stop_progress(&progress
);
1191 /* Check pack integrity */
1193 the_hash_algo
->final_fn(hash
, &input_ctx
);
1194 if (!hasheq(fill(the_hash_algo
->rawsz
), hash
))
1195 die(_("pack is corrupted (SHA1 mismatch)"));
1196 use(the_hash_algo
->rawsz
);
1198 /* If input_fd is a file, we should have reached its end now. */
1199 if (fstat(input_fd
, &st
))
1200 die_errno(_("cannot fstat packfile"));
1201 if (S_ISREG(st
.st_mode
) &&
1202 lseek(input_fd
, 0, SEEK_CUR
) - input_len
!= st
.st_size
)
1203 die(_("pack has junk at the end"));
1205 for (i
= 0; i
< nr_objects
; i
++) {
1206 struct object_entry
*obj
= &objects
[i
];
1207 if (obj
->real_type
!= OBJ_BAD
)
1209 obj
->real_type
= obj
->type
;
1210 sha1_object(NULL
, obj
, obj
->size
, obj
->type
,
1215 die(_("confusion beyond insanity in parse_pack_objects()"));
1220 * - for all non-delta objects, look if it is used as a base for
1222 * - if used as a base, uncompress the object and apply all deltas,
1223 * recursively checking if the resulting object is used as a base
1224 * for some more deltas.
1226 static void resolve_deltas(void)
1230 if (!nr_ofs_deltas
&& !nr_ref_deltas
)
1233 /* Sort deltas by base SHA1/offset for fast searching */
1234 QSORT(ofs_deltas
, nr_ofs_deltas
, compare_ofs_delta_entry
);
1235 QSORT(ref_deltas
, nr_ref_deltas
, compare_ref_delta_entry
);
1237 if (verbose
|| show_resolving_progress
)
1238 progress
= start_progress(_("Resolving deltas"),
1239 nr_ref_deltas
+ nr_ofs_deltas
);
1242 base_cache_limit
= delta_base_cache_limit
* nr_threads
;
1243 if (nr_threads
> 1 || getenv("GIT_FORCE_THREADS")) {
1245 for (i
= 0; i
< nr_threads
; i
++) {
1246 int ret
= pthread_create(&thread_data
[i
].thread
, NULL
,
1247 threaded_second_pass
, thread_data
+ i
);
1249 die(_("unable to create thread: %s"),
1252 for (i
= 0; i
< nr_threads
; i
++)
1253 pthread_join(thread_data
[i
].thread
, NULL
);
1257 threaded_second_pass(¬hread_data
);
1262 * - append objects to convert thin pack to full pack if required
1263 * - write the final pack hash
1265 static void fix_unresolved_deltas(struct hashfile
*f
);
1266 static void conclude_pack(int fix_thin_pack
, const char *curr_pack
, unsigned char *pack_hash
)
1268 if (nr_ref_deltas
+ nr_ofs_deltas
== nr_resolved_deltas
) {
1269 stop_progress(&progress
);
1270 /* Flush remaining pack final hash. */
1275 if (fix_thin_pack
) {
1277 unsigned char read_hash
[GIT_MAX_RAWSZ
], tail_hash
[GIT_MAX_RAWSZ
];
1278 struct strbuf msg
= STRBUF_INIT
;
1279 int nr_unresolved
= nr_ofs_deltas
+ nr_ref_deltas
- nr_resolved_deltas
;
1280 int nr_objects_initial
= nr_objects
;
1281 if (nr_unresolved
<= 0)
1282 die(_("confusion beyond insanity"));
1283 REALLOC_ARRAY(objects
, nr_objects
+ nr_unresolved
+ 1);
1284 memset(objects
+ nr_objects
+ 1, 0,
1285 nr_unresolved
* sizeof(*objects
));
1286 f
= hashfd(output_fd
, curr_pack
);
1287 fix_unresolved_deltas(f
);
1288 strbuf_addf(&msg
, Q_("completed with %d local object",
1289 "completed with %d local objects",
1290 nr_objects
- nr_objects_initial
),
1291 nr_objects
- nr_objects_initial
);
1292 stop_progress_msg(&progress
, msg
.buf
);
1293 strbuf_release(&msg
);
1294 finalize_hashfile(f
, tail_hash
, 0);
1295 hashcpy(read_hash
, pack_hash
);
1296 fixup_pack_header_footer(output_fd
, pack_hash
,
1297 curr_pack
, nr_objects
,
1298 read_hash
, consumed_bytes
-the_hash_algo
->rawsz
);
1299 if (!hasheq(read_hash
, tail_hash
))
1300 die(_("Unexpected tail checksum for %s "
1301 "(disk corruption?)"), curr_pack
);
1303 if (nr_ofs_deltas
+ nr_ref_deltas
!= nr_resolved_deltas
)
1304 die(Q_("pack has %d unresolved delta",
1305 "pack has %d unresolved deltas",
1306 nr_ofs_deltas
+ nr_ref_deltas
- nr_resolved_deltas
),
1307 nr_ofs_deltas
+ nr_ref_deltas
- nr_resolved_deltas
);
1310 static int write_compressed(struct hashfile
*f
, void *in
, unsigned int size
)
1314 unsigned char outbuf
[4096];
1316 git_deflate_init(&stream
, zlib_compression_level
);
1317 stream
.next_in
= in
;
1318 stream
.avail_in
= size
;
1321 stream
.next_out
= outbuf
;
1322 stream
.avail_out
= sizeof(outbuf
);
1323 status
= git_deflate(&stream
, Z_FINISH
);
1324 hashwrite(f
, outbuf
, sizeof(outbuf
) - stream
.avail_out
);
1325 } while (status
== Z_OK
);
1327 if (status
!= Z_STREAM_END
)
1328 die(_("unable to deflate appended object (%d)"), status
);
1329 size
= stream
.total_out
;
1330 git_deflate_end(&stream
);
1334 static struct object_entry
*append_obj_to_pack(struct hashfile
*f
,
1335 const unsigned char *sha1
, void *buf
,
1336 unsigned long size
, enum object_type type
)
1338 struct object_entry
*obj
= &objects
[nr_objects
++];
1339 unsigned char header
[10];
1340 unsigned long s
= size
;
1342 unsigned char c
= (type
<< 4) | (s
& 15);
1345 header
[n
++] = c
| 0x80;
1351 hashwrite(f
, header
, n
);
1353 obj
[0].hdr_size
= n
;
1355 obj
[0].real_type
= type
;
1356 obj
[1].idx
.offset
= obj
[0].idx
.offset
+ n
;
1357 obj
[1].idx
.offset
+= write_compressed(f
, buf
, size
);
1358 obj
[0].idx
.crc32
= crc32_end(f
);
1360 hashcpy(obj
->idx
.oid
.hash
, sha1
);
1364 static int delta_pos_compare(const void *_a
, const void *_b
)
1366 struct ref_delta_entry
*a
= *(struct ref_delta_entry
**)_a
;
1367 struct ref_delta_entry
*b
= *(struct ref_delta_entry
**)_b
;
1368 return a
->obj_no
- b
->obj_no
;
1371 static void fix_unresolved_deltas(struct hashfile
*f
)
1373 struct ref_delta_entry
**sorted_by_pos
;
1377 * Since many unresolved deltas may well be themselves base objects
1378 * for more unresolved deltas, we really want to include the
1379 * smallest number of base objects that would cover as much delta
1380 * as possible by picking the
1381 * trunc deltas first, allowing for other deltas to resolve without
1382 * additional base objects. Since most base objects are to be found
1383 * before deltas depending on them, a good heuristic is to start
1384 * resolving deltas in the same order as their position in the pack.
1386 ALLOC_ARRAY(sorted_by_pos
, nr_ref_deltas
);
1387 for (i
= 0; i
< nr_ref_deltas
; i
++)
1388 sorted_by_pos
[i
] = &ref_deltas
[i
];
1389 QSORT(sorted_by_pos
, nr_ref_deltas
, delta_pos_compare
);
1391 if (has_promisor_remote()) {
1393 * Prefetch the delta bases.
1395 struct oid_array to_fetch
= OID_ARRAY_INIT
;
1396 for (i
= 0; i
< nr_ref_deltas
; i
++) {
1397 struct ref_delta_entry
*d
= sorted_by_pos
[i
];
1398 if (!oid_object_info_extended(the_repository
, &d
->oid
,
1400 OBJECT_INFO_FOR_PREFETCH
))
1402 oid_array_append(&to_fetch
, &d
->oid
);
1404 promisor_remote_get_direct(the_repository
,
1405 to_fetch
.oid
, to_fetch
.nr
);
1406 oid_array_clear(&to_fetch
);
1409 for (i
= 0; i
< nr_ref_deltas
; i
++) {
1410 struct ref_delta_entry
*d
= sorted_by_pos
[i
];
1411 enum object_type type
;
1415 if (objects
[d
->obj_no
].real_type
!= OBJ_REF_DELTA
)
1417 data
= read_object_file(&d
->oid
, &type
, &size
);
1421 if (check_object_signature(the_repository
, &d
->oid
,
1424 die(_("local object %s is corrupt"), oid_to_hex(&d
->oid
));
1427 * Add this as an object to the objects array and call
1428 * threaded_second_pass() (which will pick up the added
1431 append_obj_to_pack(f
, d
->oid
.hash
, data
, size
, type
);
1432 threaded_second_pass(NULL
);
1434 display_progress(progress
, nr_resolved_deltas
);
1436 free(sorted_by_pos
);
1439 static const char *derive_filename(const char *pack_name
, const char *suffix
,
1443 if (!strip_suffix(pack_name
, ".pack", &len
))
1444 die(_("packfile name '%s' does not end with '.pack'"),
1446 strbuf_add(buf
, pack_name
, len
);
1447 strbuf_addch(buf
, '.');
1448 strbuf_addstr(buf
, suffix
);
1452 static void write_special_file(const char *suffix
, const char *msg
,
1453 const char *pack_name
, const unsigned char *hash
,
1454 const char **report
)
1456 struct strbuf name_buf
= STRBUF_INIT
;
1457 const char *filename
;
1459 int msg_len
= strlen(msg
);
1462 filename
= derive_filename(pack_name
, suffix
, &name_buf
);
1464 filename
= odb_pack_name(&name_buf
, hash
, suffix
);
1466 fd
= odb_pack_keep(filename
);
1468 if (errno
!= EEXIST
)
1469 die_errno(_("cannot write %s file '%s'"),
1473 write_or_die(fd
, msg
, msg_len
);
1474 write_or_die(fd
, "\n", 1);
1477 die_errno(_("cannot close written %s file '%s'"),
1482 strbuf_release(&name_buf
);
1485 static void final(const char *final_pack_name
, const char *curr_pack_name
,
1486 const char *final_index_name
, const char *curr_index_name
,
1487 const char *keep_msg
, const char *promisor_msg
,
1488 unsigned char *hash
)
1490 const char *report
= "pack";
1491 struct strbuf pack_name
= STRBUF_INIT
;
1492 struct strbuf index_name
= STRBUF_INIT
;
1498 fsync_or_die(output_fd
, curr_pack_name
);
1499 err
= close(output_fd
);
1501 die_errno(_("error while closing pack file"));
1505 write_special_file("keep", keep_msg
, final_pack_name
, hash
,
1508 write_special_file("promisor", promisor_msg
, final_pack_name
,
1511 if (final_pack_name
!= curr_pack_name
) {
1512 if (!final_pack_name
)
1513 final_pack_name
= odb_pack_name(&pack_name
, hash
, "pack");
1514 if (finalize_object_file(curr_pack_name
, final_pack_name
))
1515 die(_("cannot store pack file"));
1516 } else if (from_stdin
)
1517 chmod(final_pack_name
, 0444);
1519 if (final_index_name
!= curr_index_name
) {
1520 if (!final_index_name
)
1521 final_index_name
= odb_pack_name(&index_name
, hash
, "idx");
1522 if (finalize_object_file(curr_index_name
, final_index_name
))
1523 die(_("cannot store index file"));
1525 chmod(final_index_name
, 0444);
1527 if (do_fsck_object
) {
1528 struct packed_git
*p
;
1529 p
= add_packed_git(final_index_name
, strlen(final_index_name
), 0);
1531 install_packed_git(the_repository
, p
);
1535 printf("%s\n", hash_to_hex(hash
));
1537 struct strbuf buf
= STRBUF_INIT
;
1539 strbuf_addf(&buf
, "%s\t%s\n", report
, hash_to_hex(hash
));
1540 write_or_die(1, buf
.buf
, buf
.len
);
1541 strbuf_release(&buf
);
1544 * Let's just mimic git-unpack-objects here and write
1545 * the last part of the input buffer to stdout.
1548 err
= xwrite(1, input_buffer
+ input_offset
, input_len
);
1552 input_offset
+= err
;
1556 strbuf_release(&index_name
);
1557 strbuf_release(&pack_name
);
1560 static int git_index_pack_config(const char *k
, const char *v
, void *cb
)
1562 struct pack_idx_option
*opts
= cb
;
1564 if (!strcmp(k
, "pack.indexversion")) {
1565 opts
->version
= git_config_int(k
, v
);
1566 if (opts
->version
> 2)
1567 die(_("bad pack.indexversion=%"PRIu32
), opts
->version
);
1570 if (!strcmp(k
, "pack.threads")) {
1571 nr_threads
= git_config_int(k
, v
);
1573 die(_("invalid number of threads specified (%d)"),
1575 if (!HAVE_THREADS
&& nr_threads
!= 1) {
1576 warning(_("no threads support, ignoring %s"), k
);
1581 return git_default_config(k
, v
, cb
);
1584 static int cmp_uint32(const void *a_
, const void *b_
)
1586 uint32_t a
= *((uint32_t *)a_
);
1587 uint32_t b
= *((uint32_t *)b_
);
1589 return (a
< b
) ? -1 : (a
!= b
);
1592 static void read_v2_anomalous_offsets(struct packed_git
*p
,
1593 struct pack_idx_option
*opts
)
1595 const uint32_t *idx1
, *idx2
;
1598 /* The address of the 4-byte offset table */
1599 idx1
= (((const uint32_t *)((const uint8_t *)p
->index_data
+ p
->crc_offset
))
1600 + p
->num_objects
/* CRC32 table */
1603 /* The address of the 8-byte offset table */
1604 idx2
= idx1
+ p
->num_objects
;
1606 for (i
= 0; i
< p
->num_objects
; i
++) {
1607 uint32_t off
= ntohl(idx1
[i
]);
1608 if (!(off
& 0x80000000))
1610 off
= off
& 0x7fffffff;
1611 check_pack_index_ptr(p
, &idx2
[off
* 2]);
1615 * The real offset is ntohl(idx2[off * 2]) in high 4
1616 * octets, and ntohl(idx2[off * 2 + 1]) in low 4
1617 * octets. But idx2[off * 2] is Zero!!!
1619 ALLOC_GROW(opts
->anomaly
, opts
->anomaly_nr
+ 1, opts
->anomaly_alloc
);
1620 opts
->anomaly
[opts
->anomaly_nr
++] = ntohl(idx2
[off
* 2 + 1]);
1623 QSORT(opts
->anomaly
, opts
->anomaly_nr
, cmp_uint32
);
1626 static void read_idx_option(struct pack_idx_option
*opts
, const char *pack_name
)
1628 struct packed_git
*p
= add_packed_git(pack_name
, strlen(pack_name
), 1);
1631 die(_("Cannot open existing pack file '%s'"), pack_name
);
1632 if (open_pack_index(p
))
1633 die(_("Cannot open existing pack idx file for '%s'"), pack_name
);
1635 /* Read the attributes from the existing idx file */
1636 opts
->version
= p
->index_version
;
1638 if (opts
->version
== 2)
1639 read_v2_anomalous_offsets(p
, opts
);
1642 * Get rid of the idx file as we do not need it anymore.
1643 * NEEDSWORK: extract this bit from free_pack_by_name() in
1644 * sha1-file.c, perhaps? It shouldn't matter very much as we
1645 * know we haven't installed this pack (hence we never have
1646 * read anything from it).
1648 close_pack_index(p
);
1652 static void show_pack_info(int stat_only
)
1654 int i
, baseobjects
= nr_objects
- nr_ref_deltas
- nr_ofs_deltas
;
1655 unsigned long *chain_histogram
= NULL
;
1658 chain_histogram
= xcalloc(deepest_delta
, sizeof(unsigned long));
1660 for (i
= 0; i
< nr_objects
; i
++) {
1661 struct object_entry
*obj
= &objects
[i
];
1663 if (is_delta_type(obj
->type
))
1664 chain_histogram
[obj_stat
[i
].delta_depth
- 1]++;
1667 printf("%s %-6s %"PRIuMAX
" %"PRIuMAX
" %"PRIuMAX
,
1668 oid_to_hex(&obj
->idx
.oid
),
1669 type_name(obj
->real_type
), (uintmax_t)obj
->size
,
1670 (uintmax_t)(obj
[1].idx
.offset
- obj
->idx
.offset
),
1671 (uintmax_t)obj
->idx
.offset
);
1672 if (is_delta_type(obj
->type
)) {
1673 struct object_entry
*bobj
= &objects
[obj_stat
[i
].base_object_no
];
1674 printf(" %u %s", obj_stat
[i
].delta_depth
,
1675 oid_to_hex(&bobj
->idx
.oid
));
1681 printf_ln(Q_("non delta: %d object",
1682 "non delta: %d objects",
1685 for (i
= 0; i
< deepest_delta
; i
++) {
1686 if (!chain_histogram
[i
])
1688 printf_ln(Q_("chain length = %d: %lu object",
1689 "chain length = %d: %lu objects",
1690 chain_histogram
[i
]),
1692 chain_histogram
[i
]);
1696 int cmd_index_pack(int argc
, const char **argv
, const char *prefix
)
1698 int i
, fix_thin_pack
= 0, verify
= 0, stat_only
= 0;
1699 const char *curr_index
;
1700 const char *index_name
= NULL
, *pack_name
= NULL
;
1701 const char *keep_msg
= NULL
;
1702 const char *promisor_msg
= NULL
;
1703 struct strbuf index_name_buf
= STRBUF_INIT
;
1704 struct pack_idx_entry
**idx_objects
;
1705 struct pack_idx_option opts
;
1706 unsigned char pack_hash
[GIT_MAX_RAWSZ
];
1707 unsigned foreign_nr
= 1; /* zero is a "good" value, assume bad */
1708 int report_end_of_input
= 0;
1712 * index-pack never needs to fetch missing objects except when
1713 * REF_DELTA bases are missing (which are explicitly handled). It only
1714 * accesses the repo to do hash collision checks and to check which
1715 * REF_DELTA bases need to be fetched.
1717 fetch_if_missing
= 0;
1719 if (argc
== 2 && !strcmp(argv
[1], "-h"))
1720 usage(index_pack_usage
);
1722 read_replace_refs
= 0;
1723 fsck_options
.walk
= mark_link
;
1725 reset_pack_idx_option(&opts
);
1726 git_config(git_index_pack_config
, &opts
);
1727 if (prefix
&& chdir(prefix
))
1728 die(_("Cannot come back to cwd"));
1730 for (i
= 1; i
< argc
; i
++) {
1731 const char *arg
= argv
[i
];
1734 if (!strcmp(arg
, "--stdin")) {
1736 } else if (!strcmp(arg
, "--fix-thin")) {
1738 } else if (skip_to_optional_arg(arg
, "--strict", &arg
)) {
1741 fsck_set_msg_types(&fsck_options
, arg
);
1742 } else if (!strcmp(arg
, "--check-self-contained-and-connected")) {
1744 check_self_contained_and_connected
= 1;
1745 } else if (!strcmp(arg
, "--fsck-objects")) {
1747 } else if (!strcmp(arg
, "--verify")) {
1749 } else if (!strcmp(arg
, "--verify-stat")) {
1752 } else if (!strcmp(arg
, "--verify-stat-only")) {
1756 } else if (skip_to_optional_arg(arg
, "--keep", &keep_msg
)) {
1757 ; /* nothing to do */
1758 } else if (skip_to_optional_arg(arg
, "--promisor", &promisor_msg
)) {
1759 ; /* already parsed */
1760 } else if (starts_with(arg
, "--threads=")) {
1762 nr_threads
= strtoul(arg
+10, &end
, 0);
1763 if (!arg
[10] || *end
|| nr_threads
< 0)
1764 usage(index_pack_usage
);
1765 if (!HAVE_THREADS
&& nr_threads
!= 1) {
1766 warning(_("no threads support, ignoring %s"), arg
);
1769 } else if (starts_with(arg
, "--pack_header=")) {
1770 struct pack_header
*hdr
;
1773 hdr
= (struct pack_header
*)input_buffer
;
1774 hdr
->hdr_signature
= htonl(PACK_SIGNATURE
);
1775 hdr
->hdr_version
= htonl(strtoul(arg
+ 14, &c
, 10));
1777 die(_("bad %s"), arg
);
1778 hdr
->hdr_entries
= htonl(strtoul(c
+ 1, &c
, 10));
1780 die(_("bad %s"), arg
);
1781 input_len
= sizeof(*hdr
);
1782 } else if (!strcmp(arg
, "-v")) {
1784 } else if (!strcmp(arg
, "--show-resolving-progress")) {
1785 show_resolving_progress
= 1;
1786 } else if (!strcmp(arg
, "--report-end-of-input")) {
1787 report_end_of_input
= 1;
1788 } else if (!strcmp(arg
, "-o")) {
1789 if (index_name
|| (i
+1) >= argc
)
1790 usage(index_pack_usage
);
1791 index_name
= argv
[++i
];
1792 } else if (starts_with(arg
, "--index-version=")) {
1794 opts
.version
= strtoul(arg
+ 16, &c
, 10);
1795 if (opts
.version
> 2)
1796 die(_("bad %s"), arg
);
1798 opts
.off32_limit
= strtoul(c
+1, &c
, 0);
1799 if (*c
|| opts
.off32_limit
& 0x80000000)
1800 die(_("bad %s"), arg
);
1801 } else if (skip_prefix(arg
, "--max-input-size=", &arg
)) {
1802 max_input_size
= strtoumax(arg
, NULL
, 10);
1803 } else if (skip_prefix(arg
, "--object-format=", &arg
)) {
1804 hash_algo
= hash_algo_by_name(arg
);
1805 if (hash_algo
== GIT_HASH_UNKNOWN
)
1806 die(_("unknown hash algorithm '%s'"), arg
);
1807 repo_set_hash_algo(the_repository
, hash_algo
);
1809 usage(index_pack_usage
);
1814 usage(index_pack_usage
);
1818 if (!pack_name
&& !from_stdin
)
1819 usage(index_pack_usage
);
1820 if (fix_thin_pack
&& !from_stdin
)
1821 die(_("--fix-thin cannot be used without --stdin"));
1822 if (from_stdin
&& !startup_info
->have_repository
)
1823 die(_("--stdin requires a git repository"));
1824 if (from_stdin
&& hash_algo
)
1825 die(_("--object-format cannot be used with --stdin"));
1826 if (!index_name
&& pack_name
)
1827 index_name
= derive_filename(pack_name
, "idx", &index_name_buf
);
1831 die(_("--verify with no packfile name given"));
1832 read_idx_option(&opts
, index_name
);
1833 opts
.flags
|= WRITE_IDX_VERIFY
| WRITE_IDX_STRICT
;
1836 opts
.flags
|= WRITE_IDX_STRICT
;
1838 if (HAVE_THREADS
&& !nr_threads
) {
1839 nr_threads
= online_cpus();
1841 * Experiments show that going above 20 threads doesn't help,
1842 * no matter how many cores you have. Below that, we tend to
1843 * max at half the number of online_cpus(), presumably because
1844 * half of those are hyperthreads rather than full cores. We'll
1845 * never reduce the level below "3", though, to match a
1846 * historical value that nobody complained about.
1849 ; /* too few cores to consider capping */
1850 else if (nr_threads
< 6)
1851 nr_threads
= 3; /* historic cap */
1852 else if (nr_threads
< 40)
1855 nr_threads
= 20; /* hard cap */
1858 curr_pack
= open_pack_file(pack_name
);
1859 parse_pack_header();
1860 objects
= xcalloc(st_add(nr_objects
, 1), sizeof(struct object_entry
));
1862 obj_stat
= xcalloc(st_add(nr_objects
, 1), sizeof(struct object_stat
));
1863 ofs_deltas
= xcalloc(nr_objects
, sizeof(struct ofs_delta_entry
));
1864 parse_pack_objects(pack_hash
);
1865 if (report_end_of_input
)
1866 write_in_full(2, "\0", 1);
1868 conclude_pack(fix_thin_pack
, curr_pack
, pack_hash
);
1872 foreign_nr
= check_objects();
1875 show_pack_info(stat_only
);
1877 ALLOC_ARRAY(idx_objects
, nr_objects
);
1878 for (i
= 0; i
< nr_objects
; i
++)
1879 idx_objects
[i
] = &objects
[i
].idx
;
1880 curr_index
= write_idx_file(index_name
, idx_objects
, nr_objects
, &opts
, pack_hash
);
1884 final(pack_name
, curr_pack
,
1885 index_name
, curr_index
,
1886 keep_msg
, promisor_msg
,
1891 if (do_fsck_object
&& fsck_finish(&fsck_options
))
1892 die(_("fsck error in pack objects"));
1895 strbuf_release(&index_name_buf
);
1896 if (pack_name
== NULL
)
1897 free((void *) curr_pack
);
1898 if (index_name
== NULL
)
1899 free((void *) curr_index
);
1902 * Let the caller know this pack is not self contained
1904 if (check_self_contained_and_connected
&& foreign_nr
)