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>] [--[no-]rev-index] [--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_MISSING_GITMODULES
;
125 static const char *progress_title
;
126 static int show_resolving_progress
;
127 static int show_stat
;
128 static int check_self_contained_and_connected
;
130 static struct progress
*progress
;
132 /* We always read in 4kB chunks. */
133 static unsigned char input_buffer
[4096];
134 static unsigned int input_offset
, input_len
;
135 static off_t consumed_bytes
;
136 static off_t max_input_size
;
137 static unsigned deepest_delta
;
138 static git_hash_ctx input_ctx
;
139 static uint32_t input_crc32
;
140 static int input_fd
, output_fd
;
141 static const char *curr_pack
;
143 static struct thread_local
*thread_data
;
144 static int nr_dispatched
;
145 static int threads_active
;
147 static pthread_mutex_t read_mutex
;
148 #define read_lock() lock_mutex(&read_mutex)
149 #define read_unlock() unlock_mutex(&read_mutex)
151 static pthread_mutex_t counter_mutex
;
152 #define counter_lock() lock_mutex(&counter_mutex)
153 #define counter_unlock() unlock_mutex(&counter_mutex)
155 static pthread_mutex_t work_mutex
;
156 #define work_lock() lock_mutex(&work_mutex)
157 #define work_unlock() unlock_mutex(&work_mutex)
159 static pthread_mutex_t deepest_delta_mutex
;
160 #define deepest_delta_lock() lock_mutex(&deepest_delta_mutex)
161 #define deepest_delta_unlock() unlock_mutex(&deepest_delta_mutex)
163 static pthread_key_t key
;
165 static inline void lock_mutex(pthread_mutex_t
*mutex
)
168 pthread_mutex_lock(mutex
);
171 static inline void unlock_mutex(pthread_mutex_t
*mutex
)
174 pthread_mutex_unlock(mutex
);
178 * Mutex and conditional variable can't be statically-initialized on Windows.
180 static void init_thread(void)
183 init_recursive_mutex(&read_mutex
);
184 pthread_mutex_init(&counter_mutex
, NULL
);
185 pthread_mutex_init(&work_mutex
, NULL
);
187 pthread_mutex_init(&deepest_delta_mutex
, NULL
);
188 pthread_key_create(&key
, NULL
);
189 CALLOC_ARRAY(thread_data
, nr_threads
);
190 for (i
= 0; i
< nr_threads
; i
++) {
191 thread_data
[i
].pack_fd
= xopen(curr_pack
, O_RDONLY
);
197 static void cleanup_thread(void)
203 pthread_mutex_destroy(&read_mutex
);
204 pthread_mutex_destroy(&counter_mutex
);
205 pthread_mutex_destroy(&work_mutex
);
207 pthread_mutex_destroy(&deepest_delta_mutex
);
208 for (i
= 0; i
< nr_threads
; i
++)
209 close(thread_data
[i
].pack_fd
);
210 pthread_key_delete(key
);
214 static int mark_link(struct object
*obj
, enum object_type type
,
215 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
= xopen(pack_name
, O_CREAT
|O_EXCL
|O_RDWR
, 0600);
342 nothread_data
.pack_fd
= output_fd
;
344 input_fd
= xopen(pack_name
, O_RDONLY
);
346 nothread_data
.pack_fd
= input_fd
;
348 the_hash_algo
->init_fn(&input_ctx
);
352 static void parse_pack_header(void)
354 struct pack_header
*hdr
= fill(sizeof(struct pack_header
));
356 /* Header consistency check */
357 if (hdr
->hdr_signature
!= htonl(PACK_SIGNATURE
))
358 die(_("pack signature mismatch"));
359 if (!pack_version_ok(hdr
->hdr_version
))
360 die(_("pack version %"PRIu32
" unsupported"),
361 ntohl(hdr
->hdr_version
));
363 nr_objects
= ntohl(hdr
->hdr_entries
);
364 use(sizeof(struct pack_header
));
367 __attribute__((format (printf
, 2, 3)))
368 static NORETURN
void bad_object(off_t offset
, const char *format
, ...)
373 va_start(params
, format
);
374 vsnprintf(buf
, sizeof(buf
), format
, params
);
376 die(_("pack has bad object at offset %"PRIuMAX
": %s"),
377 (uintmax_t)offset
, buf
);
380 static inline struct thread_local
*get_thread_data(void)
384 return pthread_getspecific(key
);
385 assert(!threads_active
&&
386 "This should only be reached when all threads are gone");
388 return ¬hread_data
;
391 static void set_thread_data(struct thread_local
*data
)
394 pthread_setspecific(key
, data
);
397 static void free_base_data(struct base_data
*c
)
400 FREE_AND_NULL(c
->data
);
401 base_cache_used
-= c
->size
;
405 static void prune_base_data(struct base_data
*retain
)
407 struct list_head
*pos
;
409 if (base_cache_used
<= base_cache_limit
)
412 list_for_each_prev(pos
, &done_head
) {
413 struct base_data
*b
= list_entry(pos
, struct base_data
, list
);
414 if (b
->retain_data
|| b
== retain
)
418 if (base_cache_used
<= base_cache_limit
)
423 list_for_each_prev(pos
, &work_head
) {
424 struct base_data
*b
= list_entry(pos
, struct base_data
, list
);
425 if (b
->retain_data
|| b
== retain
)
429 if (base_cache_used
<= base_cache_limit
)
435 static int is_delta_type(enum object_type type
)
437 return (type
== OBJ_REF_DELTA
|| type
== OBJ_OFS_DELTA
);
440 static void *unpack_entry_data(off_t offset
, unsigned long size
,
441 enum object_type type
, struct object_id
*oid
)
443 static char fixed_buf
[8192];
451 if (!is_delta_type(type
)) {
452 hdrlen
= xsnprintf(hdr
, sizeof(hdr
), "%s %"PRIuMAX
,
453 type_name(type
),(uintmax_t)size
) + 1;
454 the_hash_algo
->init_fn(&c
);
455 the_hash_algo
->update_fn(&c
, hdr
, hdrlen
);
458 if (type
== OBJ_BLOB
&& size
> big_file_threshold
)
461 buf
= xmallocz(size
);
463 memset(&stream
, 0, sizeof(stream
));
464 git_inflate_init(&stream
);
465 stream
.next_out
= buf
;
466 stream
.avail_out
= buf
== fixed_buf
? sizeof(fixed_buf
) : size
;
469 unsigned char *last_out
= stream
.next_out
;
470 stream
.next_in
= fill(1);
471 stream
.avail_in
= input_len
;
472 status
= git_inflate(&stream
, 0);
473 use(input_len
- stream
.avail_in
);
475 the_hash_algo
->update_fn(&c
, last_out
, stream
.next_out
- last_out
);
476 if (buf
== fixed_buf
) {
477 stream
.next_out
= buf
;
478 stream
.avail_out
= sizeof(fixed_buf
);
480 } while (status
== Z_OK
);
481 if (stream
.total_out
!= size
|| status
!= Z_STREAM_END
)
482 bad_object(offset
, _("inflate returned %d"), status
);
483 git_inflate_end(&stream
);
485 the_hash_algo
->final_oid_fn(oid
, &c
);
486 return buf
== fixed_buf
? NULL
: buf
;
489 static void *unpack_raw_entry(struct object_entry
*obj
,
491 struct object_id
*ref_oid
,
492 struct object_id
*oid
)
495 unsigned long size
, c
;
500 obj
->idx
.offset
= consumed_bytes
;
501 input_crc32
= crc32(0, NULL
, 0);
506 obj
->type
= (c
>> 4) & 7;
513 size
+= (c
& 0x7f) << shift
;
520 oidread(ref_oid
, fill(the_hash_algo
->rawsz
));
521 use(the_hash_algo
->rawsz
);
527 base_offset
= c
& 127;
530 if (!base_offset
|| MSB(base_offset
, 7))
531 bad_object(obj
->idx
.offset
, _("offset value overflow for delta base object"));
535 base_offset
= (base_offset
<< 7) + (c
& 127);
537 *ofs_offset
= obj
->idx
.offset
- base_offset
;
538 if (*ofs_offset
<= 0 || *ofs_offset
>= obj
->idx
.offset
)
539 bad_object(obj
->idx
.offset
, _("delta base offset is out of bound"));
547 bad_object(obj
->idx
.offset
, _("unknown object type %d"), obj
->type
);
549 obj
->hdr_size
= consumed_bytes
- obj
->idx
.offset
;
551 data
= unpack_entry_data(obj
->idx
.offset
, obj
->size
, obj
->type
, oid
);
552 obj
->idx
.crc32
= input_crc32
;
556 static void *unpack_data(struct object_entry
*obj
,
557 int (*consume
)(const unsigned char *, unsigned long, void *),
560 off_t from
= obj
[0].idx
.offset
+ obj
[0].hdr_size
;
561 off_t len
= obj
[1].idx
.offset
- from
;
562 unsigned char *data
, *inbuf
;
566 data
= xmallocz(consume
? 64*1024 : obj
->size
);
567 inbuf
= xmalloc((len
< 64*1024) ? (int)len
: 64*1024);
569 memset(&stream
, 0, sizeof(stream
));
570 git_inflate_init(&stream
);
571 stream
.next_out
= data
;
572 stream
.avail_out
= consume
? 64*1024 : obj
->size
;
575 ssize_t n
= (len
< 64*1024) ? (ssize_t
)len
: 64*1024;
576 n
= xpread(get_thread_data()->pack_fd
, inbuf
, n
, from
);
578 die_errno(_("cannot pread pack file"));
580 die(Q_("premature end of pack file, %"PRIuMAX
" byte missing",
581 "premature end of pack file, %"PRIuMAX
" bytes missing",
586 stream
.next_in
= inbuf
;
589 status
= git_inflate(&stream
, 0);
592 status
= git_inflate(&stream
, 0);
593 if (consume(data
, stream
.next_out
- data
, cb_data
)) {
598 stream
.next_out
= data
;
599 stream
.avail_out
= 64*1024;
600 } while (status
== Z_OK
&& stream
.avail_in
);
602 } while (len
&& status
== Z_OK
&& !stream
.avail_in
);
604 /* This has been inflated OK when first encountered, so... */
605 if (status
!= Z_STREAM_END
|| stream
.total_out
!= obj
->size
)
606 die(_("serious inflate inconsistency"));
608 git_inflate_end(&stream
);
616 static void *get_data_from_pack(struct object_entry
*obj
)
618 return unpack_data(obj
, NULL
, NULL
);
621 static int compare_ofs_delta_bases(off_t offset1
, off_t offset2
,
622 enum object_type type1
,
623 enum object_type type2
)
625 int cmp
= type1
- type2
;
628 return offset1
< offset2
? -1 :
629 offset1
> offset2
? 1 :
633 static int find_ofs_delta(const off_t offset
)
635 int first
= 0, last
= nr_ofs_deltas
;
637 while (first
< last
) {
638 int next
= first
+ (last
- first
) / 2;
639 struct ofs_delta_entry
*delta
= &ofs_deltas
[next
];
642 cmp
= compare_ofs_delta_bases(offset
, delta
->offset
,
644 objects
[delta
->obj_no
].type
);
656 static void find_ofs_delta_children(off_t offset
,
657 int *first_index
, int *last_index
)
659 int first
= find_ofs_delta(offset
);
661 int end
= nr_ofs_deltas
- 1;
668 while (first
> 0 && ofs_deltas
[first
- 1].offset
== offset
)
670 while (last
< end
&& ofs_deltas
[last
+ 1].offset
== offset
)
672 *first_index
= first
;
676 static int compare_ref_delta_bases(const struct object_id
*oid1
,
677 const struct object_id
*oid2
,
678 enum object_type type1
,
679 enum object_type type2
)
681 int cmp
= type1
- type2
;
684 return oidcmp(oid1
, oid2
);
687 static int find_ref_delta(const struct object_id
*oid
)
689 int first
= 0, last
= nr_ref_deltas
;
691 while (first
< last
) {
692 int next
= first
+ (last
- first
) / 2;
693 struct ref_delta_entry
*delta
= &ref_deltas
[next
];
696 cmp
= compare_ref_delta_bases(oid
, &delta
->oid
,
698 objects
[delta
->obj_no
].type
);
710 static void find_ref_delta_children(const struct object_id
*oid
,
711 int *first_index
, int *last_index
)
713 int first
= find_ref_delta(oid
);
715 int end
= nr_ref_deltas
- 1;
722 while (first
> 0 && oideq(&ref_deltas
[first
- 1].oid
, oid
))
724 while (last
< end
&& oideq(&ref_deltas
[last
+ 1].oid
, oid
))
726 *first_index
= first
;
730 struct compare_data
{
731 struct object_entry
*entry
;
732 struct git_istream
*st
;
734 unsigned long buf_size
;
737 static int compare_objects(const unsigned char *buf
, unsigned long size
,
740 struct compare_data
*data
= cb_data
;
742 if (data
->buf_size
< size
) {
744 data
->buf
= xmalloc(size
);
745 data
->buf_size
= size
;
749 ssize_t len
= read_istream(data
->st
, data
->buf
, size
);
751 die(_("SHA1 COLLISION FOUND WITH %s !"),
752 oid_to_hex(&data
->entry
->idx
.oid
));
754 die(_("unable to read %s"),
755 oid_to_hex(&data
->entry
->idx
.oid
));
756 if (memcmp(buf
, data
->buf
, len
))
757 die(_("SHA1 COLLISION FOUND WITH %s !"),
758 oid_to_hex(&data
->entry
->idx
.oid
));
765 static int check_collison(struct object_entry
*entry
)
767 struct compare_data data
;
768 enum object_type type
;
771 if (entry
->size
<= big_file_threshold
|| entry
->type
!= OBJ_BLOB
)
774 memset(&data
, 0, sizeof(data
));
776 data
.st
= open_istream(the_repository
, &entry
->idx
.oid
, &type
, &size
,
780 if (size
!= entry
->size
|| type
!= entry
->type
)
781 die(_("SHA1 COLLISION FOUND WITH %s !"),
782 oid_to_hex(&entry
->idx
.oid
));
783 unpack_data(entry
, compare_objects
, &data
);
784 close_istream(data
.st
);
789 static void sha1_object(const void *data
, struct object_entry
*obj_entry
,
790 unsigned long size
, enum object_type type
,
791 const struct object_id
*oid
)
793 void *new_data
= NULL
;
794 int collision_test_needed
= 0;
796 assert(data
|| obj_entry
);
798 if (startup_info
->have_repository
) {
800 collision_test_needed
=
801 has_object_file_with_flags(oid
, OBJECT_INFO_QUICK
);
805 if (collision_test_needed
&& !data
) {
807 if (!check_collison(obj_entry
))
808 collision_test_needed
= 0;
811 if (collision_test_needed
) {
813 enum object_type has_type
;
814 unsigned long has_size
;
816 has_type
= oid_object_info(the_repository
, oid
, &has_size
);
818 die(_("cannot read existing object info %s"), oid_to_hex(oid
));
819 if (has_type
!= type
|| has_size
!= size
)
820 die(_("SHA1 COLLISION FOUND WITH %s !"), oid_to_hex(oid
));
821 has_data
= read_object_file(oid
, &has_type
, &has_size
);
824 data
= new_data
= get_data_from_pack(obj_entry
);
826 die(_("cannot read existing object %s"), oid_to_hex(oid
));
827 if (size
!= has_size
|| type
!= has_type
||
828 memcmp(data
, has_data
, size
) != 0)
829 die(_("SHA1 COLLISION FOUND WITH %s !"), oid_to_hex(oid
));
833 if (strict
|| do_fsck_object
) {
835 if (type
== OBJ_BLOB
) {
836 struct blob
*blob
= lookup_blob(the_repository
, oid
);
838 blob
->object
.flags
|= FLAG_CHECKED
;
840 die(_("invalid blob object %s"), oid_to_hex(oid
));
841 if (do_fsck_object
&&
842 fsck_object(&blob
->object
, (void *)data
, size
, &fsck_options
))
843 die(_("fsck error in packed object"));
847 void *buf
= (void *) data
;
849 assert(data
&& "data can only be NULL for large _blobs_");
852 * we do not need to free the memory here, as the
853 * buf is deleted by the caller.
855 obj
= parse_object_buffer(the_repository
, oid
, type
,
859 die(_("invalid %s"), type_name(type
));
860 if (do_fsck_object
&&
861 fsck_object(obj
, buf
, size
, &fsck_options
))
862 die(_("fsck error in packed object"));
863 if (strict
&& fsck_walk(obj
, NULL
, &fsck_options
))
864 die(_("Not all child objects of %s are reachable"), oid_to_hex(&obj
->oid
));
866 if (obj
->type
== OBJ_TREE
) {
867 struct tree
*item
= (struct tree
*) obj
;
871 if (obj
->type
== OBJ_COMMIT
) {
872 struct commit
*commit
= (struct commit
*) obj
;
873 if (detach_commit_buffer(commit
, NULL
) != data
)
874 BUG("parse_object_buffer transmogrified our buffer");
876 obj
->flags
|= FLAG_CHECKED
;
885 * Ensure that this node has been reconstructed and return its contents.
887 * In the typical and best case, this node would already be reconstructed
888 * (through the invocation to resolve_delta() in threaded_second_pass()) and it
889 * would not be pruned. However, if pruning of this node was necessary due to
890 * reaching delta_base_cache_limit, this function will find the closest
891 * ancestor with reconstructed data that has not been pruned (or if there is
892 * none, the ultimate base object), and reconstruct each node in the delta
893 * chain in order to generate the reconstructed data for this node.
895 static void *get_base_data(struct base_data
*c
)
898 struct object_entry
*obj
= c
->obj
;
899 struct base_data
**delta
= NULL
;
900 int delta_nr
= 0, delta_alloc
= 0;
902 while (is_delta_type(c
->obj
->type
) && !c
->data
) {
903 ALLOC_GROW(delta
, delta_nr
+ 1, delta_alloc
);
904 delta
[delta_nr
++] = c
;
908 c
->data
= get_data_from_pack(obj
);
910 base_cache_used
+= c
->size
;
913 for (; delta_nr
> 0; delta_nr
--) {
915 c
= delta
[delta_nr
- 1];
917 base
= get_base_data(c
->base
);
918 raw
= get_data_from_pack(obj
);
919 c
->data
= patch_delta(
925 bad_object(obj
->idx
.offset
, _("failed to apply delta"));
926 base_cache_used
+= c
->size
;
934 static struct base_data
*make_base(struct object_entry
*obj
,
935 struct base_data
*parent
)
937 struct base_data
*base
= xcalloc(1, sizeof(struct base_data
));
940 find_ref_delta_children(&obj
->idx
.oid
,
941 &base
->ref_first
, &base
->ref_last
);
942 find_ofs_delta_children(obj
->idx
.offset
,
943 &base
->ofs_first
, &base
->ofs_last
);
944 base
->children_remaining
= base
->ref_last
- base
->ref_first
+
945 base
->ofs_last
- base
->ofs_first
+ 2;
949 static struct base_data
*resolve_delta(struct object_entry
*delta_obj
,
950 struct base_data
*base
)
952 void *delta_data
, *result_data
;
953 struct base_data
*result
;
954 unsigned long result_size
;
957 int i
= delta_obj
- objects
;
958 int j
= base
->obj
- objects
;
959 obj_stat
[i
].delta_depth
= obj_stat
[j
].delta_depth
+ 1;
960 deepest_delta_lock();
961 if (deepest_delta
< obj_stat
[i
].delta_depth
)
962 deepest_delta
= obj_stat
[i
].delta_depth
;
963 deepest_delta_unlock();
964 obj_stat
[i
].base_object_no
= j
;
966 delta_data
= get_data_from_pack(delta_obj
);
968 result_data
= patch_delta(base
->data
, base
->size
,
969 delta_data
, delta_obj
->size
, &result_size
);
972 bad_object(delta_obj
->idx
.offset
, _("failed to apply delta"));
973 hash_object_file(the_hash_algo
, result_data
, result_size
,
974 type_name(delta_obj
->real_type
), &delta_obj
->idx
.oid
);
975 sha1_object(result_data
, NULL
, result_size
, delta_obj
->real_type
,
976 &delta_obj
->idx
.oid
);
978 result
= make_base(delta_obj
, base
);
979 result
->data
= result_data
;
980 result
->size
= result_size
;
983 nr_resolved_deltas
++;
989 static int compare_ofs_delta_entry(const void *a
, const void *b
)
991 const struct ofs_delta_entry
*delta_a
= a
;
992 const struct ofs_delta_entry
*delta_b
= b
;
994 return delta_a
->offset
< delta_b
->offset
? -1 :
995 delta_a
->offset
> delta_b
->offset
? 1 :
999 static int compare_ref_delta_entry(const void *a
, const void *b
)
1001 const struct ref_delta_entry
*delta_a
= a
;
1002 const struct ref_delta_entry
*delta_b
= b
;
1004 return oidcmp(&delta_a
->oid
, &delta_b
->oid
);
1007 static void *threaded_second_pass(void *data
)
1010 set_thread_data(data
);
1012 struct base_data
*parent
= NULL
;
1013 struct object_entry
*child_obj
;
1014 struct base_data
*child
;
1017 display_progress(progress
, nr_resolved_deltas
);
1021 if (list_empty(&work_head
)) {
1023 * Take an object from the object array.
1025 while (nr_dispatched
< nr_objects
&&
1026 is_delta_type(objects
[nr_dispatched
].type
))
1028 if (nr_dispatched
>= nr_objects
) {
1032 child_obj
= &objects
[nr_dispatched
++];
1035 * Peek at the top of the stack, and take a child from
1038 parent
= list_first_entry(&work_head
, struct base_data
,
1041 if (parent
->ref_first
<= parent
->ref_last
) {
1042 int offset
= ref_deltas
[parent
->ref_first
++].obj_no
;
1043 child_obj
= objects
+ offset
;
1044 if (child_obj
->real_type
!= OBJ_REF_DELTA
)
1045 die("REF_DELTA at offset %"PRIuMAX
" already resolved (duplicate base %s?)",
1046 (uintmax_t) child_obj
->idx
.offset
,
1047 oid_to_hex(&parent
->obj
->idx
.oid
));
1048 child_obj
->real_type
= parent
->obj
->real_type
;
1050 child_obj
= objects
+
1051 ofs_deltas
[parent
->ofs_first
++].obj_no
;
1052 assert(child_obj
->real_type
== OBJ_OFS_DELTA
);
1053 child_obj
->real_type
= parent
->obj
->real_type
;
1056 if (parent
->ref_first
> parent
->ref_last
&&
1057 parent
->ofs_first
> parent
->ofs_last
) {
1059 * This parent has run out of children, so move
1062 list_del(&parent
->list
);
1063 list_add(&parent
->list
, &done_head
);
1067 * Ensure that the parent has data, since we will need
1070 * NEEDSWORK: If parent data needs to be reloaded, this
1071 * prolongs the time that the current thread spends in
1072 * the mutex. A mitigating factor is that parent data
1073 * needs to be reloaded only if the delta base cache
1074 * limit is exceeded, so in the typical case, this does
1077 get_base_data(parent
);
1078 parent
->retain_data
++;
1083 child
= resolve_delta(child_obj
, parent
);
1084 if (!child
->children_remaining
)
1085 FREE_AND_NULL(child
->data
);
1087 child
= make_base(child_obj
, NULL
);
1088 if (child
->children_remaining
) {
1090 * Since this child has its own delta children,
1091 * we will need this data in the future.
1092 * Inflate now so that future iterations will
1093 * have access to this object's data while
1094 * outside the work mutex.
1096 child
->data
= get_data_from_pack(child_obj
);
1097 child
->size
= child_obj
->size
;
1103 parent
->retain_data
--;
1106 * This child has its own children, so add it to
1109 list_add(&child
->list
, &work_head
);
1110 base_cache_used
+= child
->size
;
1111 prune_base_data(NULL
);
1114 * This child does not have its own children. It may be
1115 * the last descendant of its ancestors; free those
1118 struct base_data
*p
= parent
;
1121 struct base_data
*next_p
;
1123 p
->children_remaining
--;
1124 if (p
->children_remaining
)
1142 * - find locations of all objects;
1143 * - calculate SHA1 of all non-delta objects;
1144 * - remember base (SHA1 or offset) for all deltas.
1146 static void parse_pack_objects(unsigned char *hash
)
1148 int i
, nr_delays
= 0;
1149 struct ofs_delta_entry
*ofs_delta
= ofs_deltas
;
1150 struct object_id ref_delta_oid
;
1154 progress
= start_progress(
1155 progress_title
? progress_title
:
1156 from_stdin
? _("Receiving objects") : _("Indexing objects"),
1158 for (i
= 0; i
< nr_objects
; i
++) {
1159 struct object_entry
*obj
= &objects
[i
];
1160 void *data
= unpack_raw_entry(obj
, &ofs_delta
->offset
,
1163 obj
->real_type
= obj
->type
;
1164 if (obj
->type
== OBJ_OFS_DELTA
) {
1166 ofs_delta
->obj_no
= i
;
1168 } else if (obj
->type
== OBJ_REF_DELTA
) {
1169 ALLOC_GROW(ref_deltas
, nr_ref_deltas
+ 1, ref_deltas_alloc
);
1170 oidcpy(&ref_deltas
[nr_ref_deltas
].oid
, &ref_delta_oid
);
1171 ref_deltas
[nr_ref_deltas
].obj_no
= i
;
1174 /* large blobs, check later */
1175 obj
->real_type
= OBJ_BAD
;
1178 sha1_object(data
, NULL
, obj
->size
, obj
->type
,
1181 display_progress(progress
, i
+1);
1183 objects
[i
].idx
.offset
= consumed_bytes
;
1184 stop_progress(&progress
);
1186 /* Check pack integrity */
1188 the_hash_algo
->final_fn(hash
, &input_ctx
);
1189 if (!hasheq(fill(the_hash_algo
->rawsz
), hash
))
1190 die(_("pack is corrupted (SHA1 mismatch)"));
1191 use(the_hash_algo
->rawsz
);
1193 /* If input_fd is a file, we should have reached its end now. */
1194 if (fstat(input_fd
, &st
))
1195 die_errno(_("cannot fstat packfile"));
1196 if (S_ISREG(st
.st_mode
) &&
1197 lseek(input_fd
, 0, SEEK_CUR
) - input_len
!= st
.st_size
)
1198 die(_("pack has junk at the end"));
1200 for (i
= 0; i
< nr_objects
; i
++) {
1201 struct object_entry
*obj
= &objects
[i
];
1202 if (obj
->real_type
!= OBJ_BAD
)
1204 obj
->real_type
= obj
->type
;
1205 sha1_object(NULL
, obj
, obj
->size
, obj
->type
,
1210 die(_("confusion beyond insanity in parse_pack_objects()"));
1215 * - for all non-delta objects, look if it is used as a base for
1217 * - if used as a base, uncompress the object and apply all deltas,
1218 * recursively checking if the resulting object is used as a base
1219 * for some more deltas.
1221 static void resolve_deltas(void)
1225 if (!nr_ofs_deltas
&& !nr_ref_deltas
)
1228 /* Sort deltas by base SHA1/offset for fast searching */
1229 QSORT(ofs_deltas
, nr_ofs_deltas
, compare_ofs_delta_entry
);
1230 QSORT(ref_deltas
, nr_ref_deltas
, compare_ref_delta_entry
);
1232 if (verbose
|| show_resolving_progress
)
1233 progress
= start_progress(_("Resolving deltas"),
1234 nr_ref_deltas
+ nr_ofs_deltas
);
1237 base_cache_limit
= delta_base_cache_limit
* nr_threads
;
1238 if (nr_threads
> 1 || getenv("GIT_FORCE_THREADS")) {
1240 for (i
= 0; i
< nr_threads
; i
++) {
1241 int ret
= pthread_create(&thread_data
[i
].thread
, NULL
,
1242 threaded_second_pass
, thread_data
+ i
);
1244 die(_("unable to create thread: %s"),
1247 for (i
= 0; i
< nr_threads
; i
++)
1248 pthread_join(thread_data
[i
].thread
, NULL
);
1252 threaded_second_pass(¬hread_data
);
1257 * - append objects to convert thin pack to full pack if required
1258 * - write the final pack hash
1260 static void fix_unresolved_deltas(struct hashfile
*f
);
1261 static void conclude_pack(int fix_thin_pack
, const char *curr_pack
, unsigned char *pack_hash
)
1263 if (nr_ref_deltas
+ nr_ofs_deltas
== nr_resolved_deltas
) {
1264 stop_progress(&progress
);
1265 /* Flush remaining pack final hash. */
1270 if (fix_thin_pack
) {
1272 unsigned char read_hash
[GIT_MAX_RAWSZ
], tail_hash
[GIT_MAX_RAWSZ
];
1273 struct strbuf msg
= STRBUF_INIT
;
1274 int nr_unresolved
= nr_ofs_deltas
+ nr_ref_deltas
- nr_resolved_deltas
;
1275 int nr_objects_initial
= nr_objects
;
1276 if (nr_unresolved
<= 0)
1277 die(_("confusion beyond insanity"));
1278 REALLOC_ARRAY(objects
, nr_objects
+ nr_unresolved
+ 1);
1279 memset(objects
+ nr_objects
+ 1, 0,
1280 nr_unresolved
* sizeof(*objects
));
1281 f
= hashfd(output_fd
, curr_pack
);
1282 fix_unresolved_deltas(f
);
1283 strbuf_addf(&msg
, Q_("completed with %d local object",
1284 "completed with %d local objects",
1285 nr_objects
- nr_objects_initial
),
1286 nr_objects
- nr_objects_initial
);
1287 stop_progress_msg(&progress
, msg
.buf
);
1288 strbuf_release(&msg
);
1289 finalize_hashfile(f
, tail_hash
, 0);
1290 hashcpy(read_hash
, pack_hash
);
1291 fixup_pack_header_footer(output_fd
, pack_hash
,
1292 curr_pack
, nr_objects
,
1293 read_hash
, consumed_bytes
-the_hash_algo
->rawsz
);
1294 if (!hasheq(read_hash
, tail_hash
))
1295 die(_("Unexpected tail checksum for %s "
1296 "(disk corruption?)"), curr_pack
);
1298 if (nr_ofs_deltas
+ nr_ref_deltas
!= nr_resolved_deltas
)
1299 die(Q_("pack has %d unresolved delta",
1300 "pack has %d unresolved deltas",
1301 nr_ofs_deltas
+ nr_ref_deltas
- nr_resolved_deltas
),
1302 nr_ofs_deltas
+ nr_ref_deltas
- nr_resolved_deltas
);
1305 static int write_compressed(struct hashfile
*f
, void *in
, unsigned int size
)
1309 unsigned char outbuf
[4096];
1311 git_deflate_init(&stream
, zlib_compression_level
);
1312 stream
.next_in
= in
;
1313 stream
.avail_in
= size
;
1316 stream
.next_out
= outbuf
;
1317 stream
.avail_out
= sizeof(outbuf
);
1318 status
= git_deflate(&stream
, Z_FINISH
);
1319 hashwrite(f
, outbuf
, sizeof(outbuf
) - stream
.avail_out
);
1320 } while (status
== Z_OK
);
1322 if (status
!= Z_STREAM_END
)
1323 die(_("unable to deflate appended object (%d)"), status
);
1324 size
= stream
.total_out
;
1325 git_deflate_end(&stream
);
1329 static struct object_entry
*append_obj_to_pack(struct hashfile
*f
,
1330 const unsigned char *sha1
, void *buf
,
1331 unsigned long size
, enum object_type type
)
1333 struct object_entry
*obj
= &objects
[nr_objects
++];
1334 unsigned char header
[10];
1335 unsigned long s
= size
;
1337 unsigned char c
= (type
<< 4) | (s
& 15);
1340 header
[n
++] = c
| 0x80;
1346 hashwrite(f
, header
, n
);
1348 obj
[0].hdr_size
= n
;
1350 obj
[0].real_type
= type
;
1351 obj
[1].idx
.offset
= obj
[0].idx
.offset
+ n
;
1352 obj
[1].idx
.offset
+= write_compressed(f
, buf
, size
);
1353 obj
[0].idx
.crc32
= crc32_end(f
);
1355 oidread(&obj
->idx
.oid
, sha1
);
1359 static int delta_pos_compare(const void *_a
, const void *_b
)
1361 struct ref_delta_entry
*a
= *(struct ref_delta_entry
**)_a
;
1362 struct ref_delta_entry
*b
= *(struct ref_delta_entry
**)_b
;
1363 return a
->obj_no
- b
->obj_no
;
1366 static void fix_unresolved_deltas(struct hashfile
*f
)
1368 struct ref_delta_entry
**sorted_by_pos
;
1372 * Since many unresolved deltas may well be themselves base objects
1373 * for more unresolved deltas, we really want to include the
1374 * smallest number of base objects that would cover as much delta
1375 * as possible by picking the
1376 * trunc deltas first, allowing for other deltas to resolve without
1377 * additional base objects. Since most base objects are to be found
1378 * before deltas depending on them, a good heuristic is to start
1379 * resolving deltas in the same order as their position in the pack.
1381 ALLOC_ARRAY(sorted_by_pos
, nr_ref_deltas
);
1382 for (i
= 0; i
< nr_ref_deltas
; i
++)
1383 sorted_by_pos
[i
] = &ref_deltas
[i
];
1384 QSORT(sorted_by_pos
, nr_ref_deltas
, delta_pos_compare
);
1386 if (has_promisor_remote()) {
1388 * Prefetch the delta bases.
1390 struct oid_array to_fetch
= OID_ARRAY_INIT
;
1391 for (i
= 0; i
< nr_ref_deltas
; i
++) {
1392 struct ref_delta_entry
*d
= sorted_by_pos
[i
];
1393 if (!oid_object_info_extended(the_repository
, &d
->oid
,
1395 OBJECT_INFO_FOR_PREFETCH
))
1397 oid_array_append(&to_fetch
, &d
->oid
);
1399 promisor_remote_get_direct(the_repository
,
1400 to_fetch
.oid
, to_fetch
.nr
);
1401 oid_array_clear(&to_fetch
);
1404 for (i
= 0; i
< nr_ref_deltas
; i
++) {
1405 struct ref_delta_entry
*d
= sorted_by_pos
[i
];
1406 enum object_type type
;
1410 if (objects
[d
->obj_no
].real_type
!= OBJ_REF_DELTA
)
1412 data
= read_object_file(&d
->oid
, &type
, &size
);
1416 if (check_object_signature(the_repository
, &d
->oid
,
1418 type_name(type
), NULL
))
1419 die(_("local object %s is corrupt"), oid_to_hex(&d
->oid
));
1422 * Add this as an object to the objects array and call
1423 * threaded_second_pass() (which will pick up the added
1426 append_obj_to_pack(f
, d
->oid
.hash
, data
, size
, type
);
1427 threaded_second_pass(NULL
);
1429 display_progress(progress
, nr_resolved_deltas
);
1431 free(sorted_by_pos
);
1434 static const char *derive_filename(const char *pack_name
, const char *strip
,
1435 const char *suffix
, struct strbuf
*buf
)
1438 if (!strip_suffix(pack_name
, strip
, &len
) || !len
||
1439 pack_name
[len
- 1] != '.')
1440 die(_("packfile name '%s' does not end with '.%s'"),
1442 strbuf_add(buf
, pack_name
, len
);
1443 strbuf_addstr(buf
, suffix
);
1447 static void write_special_file(const char *suffix
, const char *msg
,
1448 const char *pack_name
, const unsigned char *hash
,
1449 const char **report
)
1451 struct strbuf name_buf
= STRBUF_INIT
;
1452 const char *filename
;
1454 int msg_len
= strlen(msg
);
1457 filename
= derive_filename(pack_name
, "pack", suffix
, &name_buf
);
1459 filename
= odb_pack_name(&name_buf
, hash
, suffix
);
1461 fd
= odb_pack_keep(filename
);
1463 if (errno
!= EEXIST
)
1464 die_errno(_("cannot write %s file '%s'"),
1468 write_or_die(fd
, msg
, msg_len
);
1469 write_or_die(fd
, "\n", 1);
1472 die_errno(_("cannot close written %s file '%s'"),
1477 strbuf_release(&name_buf
);
1480 static void rename_tmp_packfile(const char **final_name
,
1481 const char *curr_name
,
1482 struct strbuf
*name
, unsigned char *hash
,
1483 const char *ext
, int make_read_only_if_same
)
1485 if (*final_name
!= curr_name
) {
1487 *final_name
= odb_pack_name(name
, hash
, ext
);
1488 if (finalize_object_file(curr_name
, *final_name
))
1489 die(_("unable to rename temporary '*.%s' file to '%s"),
1491 } else if (make_read_only_if_same
) {
1492 chmod(*final_name
, 0444);
1496 static void final(const char *final_pack_name
, const char *curr_pack_name
,
1497 const char *final_index_name
, const char *curr_index_name
,
1498 const char *final_rev_index_name
, const char *curr_rev_index_name
,
1499 const char *keep_msg
, const char *promisor_msg
,
1500 unsigned char *hash
)
1502 const char *report
= "pack";
1503 struct strbuf pack_name
= STRBUF_INIT
;
1504 struct strbuf index_name
= STRBUF_INIT
;
1505 struct strbuf rev_index_name
= STRBUF_INIT
;
1511 fsync_or_die(output_fd
, curr_pack_name
);
1512 err
= close(output_fd
);
1514 die_errno(_("error while closing pack file"));
1518 write_special_file("keep", keep_msg
, final_pack_name
, hash
,
1521 write_special_file("promisor", promisor_msg
, final_pack_name
,
1524 rename_tmp_packfile(&final_pack_name
, curr_pack_name
, &pack_name
,
1525 hash
, "pack", from_stdin
);
1526 if (curr_rev_index_name
)
1527 rename_tmp_packfile(&final_rev_index_name
, curr_rev_index_name
,
1528 &rev_index_name
, hash
, "rev", 1);
1529 rename_tmp_packfile(&final_index_name
, curr_index_name
, &index_name
,
1532 if (do_fsck_object
) {
1533 struct packed_git
*p
;
1534 p
= add_packed_git(final_index_name
, strlen(final_index_name
), 0);
1536 install_packed_git(the_repository
, p
);
1540 printf("%s\n", hash_to_hex(hash
));
1542 struct strbuf buf
= STRBUF_INIT
;
1544 strbuf_addf(&buf
, "%s\t%s\n", report
, hash_to_hex(hash
));
1545 write_or_die(1, buf
.buf
, buf
.len
);
1546 strbuf_release(&buf
);
1549 * Let's just mimic git-unpack-objects here and write
1550 * the last part of the input buffer to stdout.
1553 err
= xwrite(1, input_buffer
+ input_offset
, input_len
);
1557 input_offset
+= err
;
1561 strbuf_release(&rev_index_name
);
1562 strbuf_release(&index_name
);
1563 strbuf_release(&pack_name
);
1566 static int git_index_pack_config(const char *k
, const char *v
, void *cb
)
1568 struct pack_idx_option
*opts
= cb
;
1570 if (!strcmp(k
, "pack.indexversion")) {
1571 opts
->version
= git_config_int(k
, v
);
1572 if (opts
->version
> 2)
1573 die(_("bad pack.indexversion=%"PRIu32
), opts
->version
);
1576 if (!strcmp(k
, "pack.threads")) {
1577 nr_threads
= git_config_int(k
, v
);
1579 die(_("invalid number of threads specified (%d)"),
1581 if (!HAVE_THREADS
&& nr_threads
!= 1) {
1582 warning(_("no threads support, ignoring %s"), k
);
1587 if (!strcmp(k
, "pack.writereverseindex")) {
1588 if (git_config_bool(k
, v
))
1589 opts
->flags
|= WRITE_REV
;
1591 opts
->flags
&= ~WRITE_REV
;
1593 return git_default_config(k
, v
, cb
);
1596 static int cmp_uint32(const void *a_
, const void *b_
)
1598 uint32_t a
= *((uint32_t *)a_
);
1599 uint32_t b
= *((uint32_t *)b_
);
1601 return (a
< b
) ? -1 : (a
!= b
);
1604 static void read_v2_anomalous_offsets(struct packed_git
*p
,
1605 struct pack_idx_option
*opts
)
1607 const uint32_t *idx1
, *idx2
;
1610 /* The address of the 4-byte offset table */
1611 idx1
= (((const uint32_t *)((const uint8_t *)p
->index_data
+ p
->crc_offset
))
1612 + (size_t)p
->num_objects
/* CRC32 table */
1615 /* The address of the 8-byte offset table */
1616 idx2
= idx1
+ p
->num_objects
;
1618 for (i
= 0; i
< p
->num_objects
; i
++) {
1619 uint32_t off
= ntohl(idx1
[i
]);
1620 if (!(off
& 0x80000000))
1622 off
= off
& 0x7fffffff;
1623 check_pack_index_ptr(p
, &idx2
[off
* 2]);
1627 * The real offset is ntohl(idx2[off * 2]) in high 4
1628 * octets, and ntohl(idx2[off * 2 + 1]) in low 4
1629 * octets. But idx2[off * 2] is Zero!!!
1631 ALLOC_GROW(opts
->anomaly
, opts
->anomaly_nr
+ 1, opts
->anomaly_alloc
);
1632 opts
->anomaly
[opts
->anomaly_nr
++] = ntohl(idx2
[off
* 2 + 1]);
1635 QSORT(opts
->anomaly
, opts
->anomaly_nr
, cmp_uint32
);
1638 static void read_idx_option(struct pack_idx_option
*opts
, const char *pack_name
)
1640 struct packed_git
*p
= add_packed_git(pack_name
, strlen(pack_name
), 1);
1643 die(_("Cannot open existing pack file '%s'"), pack_name
);
1644 if (open_pack_index(p
))
1645 die(_("Cannot open existing pack idx file for '%s'"), pack_name
);
1647 /* Read the attributes from the existing idx file */
1648 opts
->version
= p
->index_version
;
1650 if (opts
->version
== 2)
1651 read_v2_anomalous_offsets(p
, opts
);
1654 * Get rid of the idx file as we do not need it anymore.
1655 * NEEDSWORK: extract this bit from free_pack_by_name() in
1656 * object-file.c, perhaps? It shouldn't matter very much as we
1657 * know we haven't installed this pack (hence we never have
1658 * read anything from it).
1660 close_pack_index(p
);
1664 static void show_pack_info(int stat_only
)
1666 int i
, baseobjects
= nr_objects
- nr_ref_deltas
- nr_ofs_deltas
;
1667 unsigned long *chain_histogram
= NULL
;
1670 CALLOC_ARRAY(chain_histogram
, deepest_delta
);
1672 for (i
= 0; i
< nr_objects
; i
++) {
1673 struct object_entry
*obj
= &objects
[i
];
1675 if (is_delta_type(obj
->type
))
1676 chain_histogram
[obj_stat
[i
].delta_depth
- 1]++;
1679 printf("%s %-6s %"PRIuMAX
" %"PRIuMAX
" %"PRIuMAX
,
1680 oid_to_hex(&obj
->idx
.oid
),
1681 type_name(obj
->real_type
), (uintmax_t)obj
->size
,
1682 (uintmax_t)(obj
[1].idx
.offset
- obj
->idx
.offset
),
1683 (uintmax_t)obj
->idx
.offset
);
1684 if (is_delta_type(obj
->type
)) {
1685 struct object_entry
*bobj
= &objects
[obj_stat
[i
].base_object_no
];
1686 printf(" %u %s", obj_stat
[i
].delta_depth
,
1687 oid_to_hex(&bobj
->idx
.oid
));
1693 printf_ln(Q_("non delta: %d object",
1694 "non delta: %d objects",
1697 for (i
= 0; i
< deepest_delta
; i
++) {
1698 if (!chain_histogram
[i
])
1700 printf_ln(Q_("chain length = %d: %lu object",
1701 "chain length = %d: %lu objects",
1702 chain_histogram
[i
]),
1704 chain_histogram
[i
]);
1708 int cmd_index_pack(int argc
, const char **argv
, const char *prefix
)
1710 int i
, fix_thin_pack
= 0, verify
= 0, stat_only
= 0, rev_index
;
1711 const char *curr_index
;
1712 const char *curr_rev_index
= NULL
;
1713 const char *index_name
= NULL
, *pack_name
= NULL
, *rev_index_name
= NULL
;
1714 const char *keep_msg
= NULL
;
1715 const char *promisor_msg
= NULL
;
1716 struct strbuf index_name_buf
= STRBUF_INIT
;
1717 struct strbuf rev_index_name_buf
= STRBUF_INIT
;
1718 struct pack_idx_entry
**idx_objects
;
1719 struct pack_idx_option opts
;
1720 unsigned char pack_hash
[GIT_MAX_RAWSZ
];
1721 unsigned foreign_nr
= 1; /* zero is a "good" value, assume bad */
1722 int report_end_of_input
= 0;
1726 * index-pack never needs to fetch missing objects except when
1727 * REF_DELTA bases are missing (which are explicitly handled). It only
1728 * accesses the repo to do hash collision checks and to check which
1729 * REF_DELTA bases need to be fetched.
1731 fetch_if_missing
= 0;
1733 if (argc
== 2 && !strcmp(argv
[1], "-h"))
1734 usage(index_pack_usage
);
1736 read_replace_refs
= 0;
1737 fsck_options
.walk
= mark_link
;
1739 reset_pack_idx_option(&opts
);
1740 git_config(git_index_pack_config
, &opts
);
1741 if (prefix
&& chdir(prefix
))
1742 die(_("Cannot come back to cwd"));
1744 if (git_env_bool(GIT_TEST_WRITE_REV_INDEX
, 0))
1747 rev_index
= !!(opts
.flags
& (WRITE_REV_VERIFY
| WRITE_REV
));
1749 for (i
= 1; i
< argc
; i
++) {
1750 const char *arg
= argv
[i
];
1753 if (!strcmp(arg
, "--stdin")) {
1755 } else if (!strcmp(arg
, "--fix-thin")) {
1757 } else if (skip_to_optional_arg(arg
, "--strict", &arg
)) {
1760 fsck_set_msg_types(&fsck_options
, arg
);
1761 } else if (!strcmp(arg
, "--check-self-contained-and-connected")) {
1763 check_self_contained_and_connected
= 1;
1764 } else if (!strcmp(arg
, "--fsck-objects")) {
1766 } else if (!strcmp(arg
, "--verify")) {
1768 } else if (!strcmp(arg
, "--verify-stat")) {
1771 } else if (!strcmp(arg
, "--verify-stat-only")) {
1775 } else if (skip_to_optional_arg(arg
, "--keep", &keep_msg
)) {
1776 ; /* nothing to do */
1777 } else if (skip_to_optional_arg(arg
, "--promisor", &promisor_msg
)) {
1778 ; /* already parsed */
1779 } else if (starts_with(arg
, "--threads=")) {
1781 nr_threads
= strtoul(arg
+10, &end
, 0);
1782 if (!arg
[10] || *end
|| nr_threads
< 0)
1783 usage(index_pack_usage
);
1784 if (!HAVE_THREADS
&& nr_threads
!= 1) {
1785 warning(_("no threads support, ignoring %s"), arg
);
1788 } else if (starts_with(arg
, "--pack_header=")) {
1789 struct pack_header
*hdr
;
1792 hdr
= (struct pack_header
*)input_buffer
;
1793 hdr
->hdr_signature
= htonl(PACK_SIGNATURE
);
1794 hdr
->hdr_version
= htonl(strtoul(arg
+ 14, &c
, 10));
1796 die(_("bad %s"), arg
);
1797 hdr
->hdr_entries
= htonl(strtoul(c
+ 1, &c
, 10));
1799 die(_("bad %s"), arg
);
1800 input_len
= sizeof(*hdr
);
1801 } else if (!strcmp(arg
, "-v")) {
1803 } else if (!strcmp(arg
, "--progress-title")) {
1804 if (progress_title
|| (i
+1) >= argc
)
1805 usage(index_pack_usage
);
1806 progress_title
= argv
[++i
];
1807 } else if (!strcmp(arg
, "--show-resolving-progress")) {
1808 show_resolving_progress
= 1;
1809 } else if (!strcmp(arg
, "--report-end-of-input")) {
1810 report_end_of_input
= 1;
1811 } else if (!strcmp(arg
, "-o")) {
1812 if (index_name
|| (i
+1) >= argc
)
1813 usage(index_pack_usage
);
1814 index_name
= argv
[++i
];
1815 } else if (starts_with(arg
, "--index-version=")) {
1817 opts
.version
= strtoul(arg
+ 16, &c
, 10);
1818 if (opts
.version
> 2)
1819 die(_("bad %s"), arg
);
1821 opts
.off32_limit
= strtoul(c
+1, &c
, 0);
1822 if (*c
|| opts
.off32_limit
& 0x80000000)
1823 die(_("bad %s"), arg
);
1824 } else if (skip_prefix(arg
, "--max-input-size=", &arg
)) {
1825 max_input_size
= strtoumax(arg
, NULL
, 10);
1826 } else if (skip_prefix(arg
, "--object-format=", &arg
)) {
1827 hash_algo
= hash_algo_by_name(arg
);
1828 if (hash_algo
== GIT_HASH_UNKNOWN
)
1829 die(_("unknown hash algorithm '%s'"), arg
);
1830 repo_set_hash_algo(the_repository
, hash_algo
);
1831 } else if (!strcmp(arg
, "--rev-index")) {
1833 } else if (!strcmp(arg
, "--no-rev-index")) {
1836 usage(index_pack_usage
);
1841 usage(index_pack_usage
);
1845 if (!pack_name
&& !from_stdin
)
1846 usage(index_pack_usage
);
1847 if (fix_thin_pack
&& !from_stdin
)
1848 die(_("--fix-thin cannot be used without --stdin"));
1849 if (from_stdin
&& !startup_info
->have_repository
)
1850 die(_("--stdin requires a git repository"));
1851 if (from_stdin
&& hash_algo
)
1852 die(_("--object-format cannot be used with --stdin"));
1853 if (!index_name
&& pack_name
)
1854 index_name
= derive_filename(pack_name
, "pack", "idx", &index_name_buf
);
1856 opts
.flags
&= ~(WRITE_REV
| WRITE_REV_VERIFY
);
1858 opts
.flags
|= verify
? WRITE_REV_VERIFY
: WRITE_REV
;
1860 rev_index_name
= derive_filename(index_name
,
1862 &rev_index_name_buf
);
1867 die(_("--verify with no packfile name given"));
1868 read_idx_option(&opts
, index_name
);
1869 opts
.flags
|= WRITE_IDX_VERIFY
| WRITE_IDX_STRICT
;
1872 opts
.flags
|= WRITE_IDX_STRICT
;
1874 if (HAVE_THREADS
&& !nr_threads
) {
1875 nr_threads
= online_cpus();
1877 * Experiments show that going above 20 threads doesn't help,
1878 * no matter how many cores you have. Below that, we tend to
1879 * max at half the number of online_cpus(), presumably because
1880 * half of those are hyperthreads rather than full cores. We'll
1881 * never reduce the level below "3", though, to match a
1882 * historical value that nobody complained about.
1885 ; /* too few cores to consider capping */
1886 else if (nr_threads
< 6)
1887 nr_threads
= 3; /* historic cap */
1888 else if (nr_threads
< 40)
1891 nr_threads
= 20; /* hard cap */
1894 curr_pack
= open_pack_file(pack_name
);
1895 parse_pack_header();
1896 CALLOC_ARRAY(objects
, st_add(nr_objects
, 1));
1898 CALLOC_ARRAY(obj_stat
, st_add(nr_objects
, 1));
1899 CALLOC_ARRAY(ofs_deltas
, nr_objects
);
1900 parse_pack_objects(pack_hash
);
1901 if (report_end_of_input
)
1902 write_in_full(2, "\0", 1);
1904 conclude_pack(fix_thin_pack
, curr_pack
, pack_hash
);
1908 foreign_nr
= check_objects();
1911 show_pack_info(stat_only
);
1913 ALLOC_ARRAY(idx_objects
, nr_objects
);
1914 for (i
= 0; i
< nr_objects
; i
++)
1915 idx_objects
[i
] = &objects
[i
].idx
;
1916 curr_index
= write_idx_file(index_name
, idx_objects
, nr_objects
, &opts
, pack_hash
);
1918 curr_rev_index
= write_rev_file(rev_index_name
, idx_objects
,
1919 nr_objects
, pack_hash
,
1924 final(pack_name
, curr_pack
,
1925 index_name
, curr_index
,
1926 rev_index_name
, curr_rev_index
,
1927 keep_msg
, promisor_msg
,
1932 if (do_fsck_object
&& fsck_finish(&fsck_options
))
1933 die(_("fsck error in pack objects"));
1936 strbuf_release(&index_name_buf
);
1937 strbuf_release(&rev_index_name_buf
);
1938 if (pack_name
== NULL
)
1939 free((void *) curr_pack
);
1940 if (index_name
== NULL
)
1941 free((void *) curr_index
);
1942 if (rev_index_name
== NULL
)
1943 free((void *) curr_rev_index
);
1946 * Let the caller know this pack is not self contained
1948 if (check_self_contained_and_connected
&& foreign_nr
)