5 #include "environment.h"
17 #include "streaming.h"
18 #include "thread-utils.h"
20 #include "object-store.h"
21 #include "replace-object.h"
22 #include "promisor-remote.h"
25 static const char index_pack_usage
[] =
26 "git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--[no-]rev-index] [--verify] [--strict] (<pack-file> | --stdin [--fix-thin] [<pack-file>])";
29 struct pack_idx_entry idx
;
31 unsigned char hdr_size
;
33 signed char real_type
;
42 /* Initialized by make_base(). */
43 struct base_data
*base
;
44 struct object_entry
*obj
;
45 int ref_first
, ref_last
;
46 int ofs_first
, ofs_last
;
48 * Threads should increment retain_data if they are about to call
49 * patch_delta() using this struct's data as a base, and decrement this
50 * when they are done. While retain_data is nonzero, this struct's data
51 * will not be freed even if the delta base cache limit is exceeded.
55 * The number of direct children that have not been fully processed
56 * (entered work_head, entered done_head, left done_head). When this
57 * number reaches zero, this struct base_data can be freed.
59 int children_remaining
;
61 /* Not initialized by make_base(). */
62 struct list_head list
;
68 * Stack of struct base_data that have unprocessed children.
69 * threaded_second_pass() uses this as a source of work (the other being the
72 * Guarded by work_mutex.
74 static LIST_HEAD(work_head
);
77 * Stack of struct base_data that have children, all of whom have been
78 * processed or are being processed, and at least one child is being processed.
79 * These struct base_data must be kept around until the last child is
82 * Guarded by work_mutex.
84 static LIST_HEAD(done_head
);
87 * All threads share one delta base cache.
89 * base_cache_used is guarded by work_mutex, and base_cache_limit is read-only
92 static size_t base_cache_used
;
93 static size_t base_cache_limit
;
100 /* Remember to update object flag allocation in object.h */
101 #define FLAG_LINK (1u<<20)
102 #define FLAG_CHECKED (1u<<21)
104 struct ofs_delta_entry
{
109 struct ref_delta_entry
{
110 struct object_id oid
;
114 static struct object_entry
*objects
;
115 static struct object_stat
*obj_stat
;
116 static struct ofs_delta_entry
*ofs_deltas
;
117 static struct ref_delta_entry
*ref_deltas
;
118 static struct thread_local nothread_data
;
119 static int nr_objects
;
120 static int nr_ofs_deltas
;
121 static int nr_ref_deltas
;
122 static int ref_deltas_alloc
;
123 static int nr_resolved_deltas
;
124 static int nr_threads
;
126 static int from_stdin
;
128 static int do_fsck_object
;
129 static struct fsck_options fsck_options
= FSCK_OPTIONS_MISSING_GITMODULES
;
131 static const char *progress_title
;
132 static int show_resolving_progress
;
133 static int show_stat
;
134 static int check_self_contained_and_connected
;
136 static struct progress
*progress
;
138 /* We always read in 4kB chunks. */
139 static unsigned char input_buffer
[4096];
140 static unsigned int input_offset
, input_len
;
141 static off_t consumed_bytes
;
142 static off_t max_input_size
;
143 static unsigned deepest_delta
;
144 static git_hash_ctx input_ctx
;
145 static uint32_t input_crc32
;
146 static int input_fd
, output_fd
;
147 static const char *curr_pack
;
149 static struct thread_local
*thread_data
;
150 static int nr_dispatched
;
151 static int threads_active
;
153 static pthread_mutex_t read_mutex
;
154 #define read_lock() lock_mutex(&read_mutex)
155 #define read_unlock() unlock_mutex(&read_mutex)
157 static pthread_mutex_t counter_mutex
;
158 #define counter_lock() lock_mutex(&counter_mutex)
159 #define counter_unlock() unlock_mutex(&counter_mutex)
161 static pthread_mutex_t work_mutex
;
162 #define work_lock() lock_mutex(&work_mutex)
163 #define work_unlock() unlock_mutex(&work_mutex)
165 static pthread_mutex_t deepest_delta_mutex
;
166 #define deepest_delta_lock() lock_mutex(&deepest_delta_mutex)
167 #define deepest_delta_unlock() unlock_mutex(&deepest_delta_mutex)
169 static pthread_key_t key
;
171 static inline void lock_mutex(pthread_mutex_t
*mutex
)
174 pthread_mutex_lock(mutex
);
177 static inline void unlock_mutex(pthread_mutex_t
*mutex
)
180 pthread_mutex_unlock(mutex
);
184 * Mutex and conditional variable can't be statically-initialized on Windows.
186 static void init_thread(void)
189 init_recursive_mutex(&read_mutex
);
190 pthread_mutex_init(&counter_mutex
, NULL
);
191 pthread_mutex_init(&work_mutex
, NULL
);
193 pthread_mutex_init(&deepest_delta_mutex
, NULL
);
194 pthread_key_create(&key
, NULL
);
195 CALLOC_ARRAY(thread_data
, nr_threads
);
196 for (i
= 0; i
< nr_threads
; i
++) {
197 thread_data
[i
].pack_fd
= xopen(curr_pack
, O_RDONLY
);
203 static void cleanup_thread(void)
209 pthread_mutex_destroy(&read_mutex
);
210 pthread_mutex_destroy(&counter_mutex
);
211 pthread_mutex_destroy(&work_mutex
);
213 pthread_mutex_destroy(&deepest_delta_mutex
);
214 for (i
= 0; i
< nr_threads
; i
++)
215 close(thread_data
[i
].pack_fd
);
216 pthread_key_delete(key
);
220 static int mark_link(struct object
*obj
, enum object_type type
,
221 void *data
, struct fsck_options
*options
)
226 if (type
!= OBJ_ANY
&& obj
->type
!= type
)
227 die(_("object type mismatch at %s"), oid_to_hex(&obj
->oid
));
229 obj
->flags
|= FLAG_LINK
;
233 /* The content of each linked object must have been checked
234 or it must be already present in the object database */
235 static unsigned check_object(struct object
*obj
)
240 if (!(obj
->flags
& FLAG_LINK
))
243 if (!(obj
->flags
& FLAG_CHECKED
)) {
245 int type
= oid_object_info(the_repository
, &obj
->oid
, &size
);
247 die(_("did not receive expected object %s"),
248 oid_to_hex(&obj
->oid
));
249 if (type
!= obj
->type
)
250 die(_("object %s: expected type %s, found %s"),
251 oid_to_hex(&obj
->oid
),
252 type_name(obj
->type
), type_name(type
));
253 obj
->flags
|= FLAG_CHECKED
;
260 static unsigned check_objects(void)
262 unsigned i
, max
, foreign_nr
= 0;
264 max
= get_max_object_index();
267 progress
= start_delayed_progress(_("Checking objects"), max
);
269 for (i
= 0; i
< max
; i
++) {
270 foreign_nr
+= check_object(get_indexed_object(i
));
271 display_progress(progress
, i
+ 1);
274 stop_progress(&progress
);
279 /* Discard current buffer used content. */
280 static void flush(void)
284 write_or_die(output_fd
, input_buffer
, input_offset
);
285 the_hash_algo
->update_fn(&input_ctx
, input_buffer
, input_offset
);
286 memmove(input_buffer
, input_buffer
+ input_offset
, input_len
);
292 * Make sure at least "min" bytes are available in the buffer, and
293 * return the pointer to the buffer.
295 static void *fill(int min
)
297 if (min
<= input_len
)
298 return input_buffer
+ input_offset
;
299 if (min
> sizeof(input_buffer
))
300 die(Q_("cannot fill %d byte",
301 "cannot fill %d bytes",
306 ssize_t ret
= xread(input_fd
, input_buffer
+ input_len
,
307 sizeof(input_buffer
) - input_len
);
311 die_errno(_("read error on input"));
315 display_throughput(progress
, consumed_bytes
+ input_len
);
316 } while (input_len
< min
);
320 static void use(int bytes
)
322 if (bytes
> input_len
)
323 die(_("used more bytes than were available"));
324 input_crc32
= crc32(input_crc32
, input_buffer
+ input_offset
, bytes
);
326 input_offset
+= bytes
;
328 /* make sure off_t is sufficiently large not to wrap */
329 if (signed_add_overflows(consumed_bytes
, bytes
))
330 die(_("pack too large for current definition of off_t"));
331 consumed_bytes
+= bytes
;
332 if (max_input_size
&& consumed_bytes
> max_input_size
) {
333 struct strbuf size_limit
= STRBUF_INIT
;
334 strbuf_humanise_bytes(&size_limit
, max_input_size
);
335 die(_("pack exceeds maximum allowed size (%s)"),
340 static const char *open_pack_file(const char *pack_name
)
345 struct strbuf tmp_file
= STRBUF_INIT
;
346 output_fd
= odb_mkstemp(&tmp_file
,
347 "pack/tmp_pack_XXXXXX");
348 pack_name
= strbuf_detach(&tmp_file
, NULL
);
350 output_fd
= xopen(pack_name
, O_CREAT
|O_EXCL
|O_RDWR
, 0600);
352 nothread_data
.pack_fd
= output_fd
;
354 input_fd
= xopen(pack_name
, O_RDONLY
);
356 nothread_data
.pack_fd
= input_fd
;
358 the_hash_algo
->init_fn(&input_ctx
);
362 static void parse_pack_header(void)
364 struct pack_header
*hdr
= fill(sizeof(struct pack_header
));
366 /* Header consistency check */
367 if (hdr
->hdr_signature
!= htonl(PACK_SIGNATURE
))
368 die(_("pack signature mismatch"));
369 if (!pack_version_ok(hdr
->hdr_version
))
370 die(_("pack version %"PRIu32
" unsupported"),
371 ntohl(hdr
->hdr_version
));
373 nr_objects
= ntohl(hdr
->hdr_entries
);
374 use(sizeof(struct pack_header
));
377 __attribute__((format (printf
, 2, 3)))
378 static NORETURN
void bad_object(off_t offset
, const char *format
, ...)
383 va_start(params
, format
);
384 vsnprintf(buf
, sizeof(buf
), format
, params
);
386 die(_("pack has bad object at offset %"PRIuMAX
": %s"),
387 (uintmax_t)offset
, buf
);
390 static inline struct thread_local
*get_thread_data(void)
394 return pthread_getspecific(key
);
395 assert(!threads_active
&&
396 "This should only be reached when all threads are gone");
398 return ¬hread_data
;
401 static void set_thread_data(struct thread_local
*data
)
404 pthread_setspecific(key
, data
);
407 static void free_base_data(struct base_data
*c
)
410 FREE_AND_NULL(c
->data
);
411 base_cache_used
-= c
->size
;
415 static void prune_base_data(struct base_data
*retain
)
417 struct list_head
*pos
;
419 if (base_cache_used
<= base_cache_limit
)
422 list_for_each_prev(pos
, &done_head
) {
423 struct base_data
*b
= list_entry(pos
, struct base_data
, list
);
424 if (b
->retain_data
|| b
== retain
)
428 if (base_cache_used
<= base_cache_limit
)
433 list_for_each_prev(pos
, &work_head
) {
434 struct base_data
*b
= list_entry(pos
, struct base_data
, list
);
435 if (b
->retain_data
|| b
== retain
)
439 if (base_cache_used
<= base_cache_limit
)
445 static int is_delta_type(enum object_type type
)
447 return (type
== OBJ_REF_DELTA
|| type
== OBJ_OFS_DELTA
);
450 static void *unpack_entry_data(off_t offset
, unsigned long size
,
451 enum object_type type
, struct object_id
*oid
)
453 static char fixed_buf
[8192];
461 if (!is_delta_type(type
)) {
462 hdrlen
= format_object_header(hdr
, sizeof(hdr
), type
, size
);
463 the_hash_algo
->init_fn(&c
);
464 the_hash_algo
->update_fn(&c
, hdr
, hdrlen
);
467 if (type
== OBJ_BLOB
&& size
> big_file_threshold
)
470 buf
= xmallocz(size
);
472 memset(&stream
, 0, sizeof(stream
));
473 git_inflate_init(&stream
);
474 stream
.next_out
= buf
;
475 stream
.avail_out
= buf
== fixed_buf
? sizeof(fixed_buf
) : size
;
478 unsigned char *last_out
= stream
.next_out
;
479 stream
.next_in
= fill(1);
480 stream
.avail_in
= input_len
;
481 status
= git_inflate(&stream
, 0);
482 use(input_len
- stream
.avail_in
);
484 the_hash_algo
->update_fn(&c
, last_out
, stream
.next_out
- last_out
);
485 if (buf
== fixed_buf
) {
486 stream
.next_out
= buf
;
487 stream
.avail_out
= sizeof(fixed_buf
);
489 } while (status
== Z_OK
);
490 if (stream
.total_out
!= size
|| status
!= Z_STREAM_END
)
491 bad_object(offset
, _("inflate returned %d"), status
);
492 git_inflate_end(&stream
);
494 the_hash_algo
->final_oid_fn(oid
, &c
);
495 return buf
== fixed_buf
? NULL
: buf
;
498 static void *unpack_raw_entry(struct object_entry
*obj
,
500 struct object_id
*ref_oid
,
501 struct object_id
*oid
)
504 unsigned long size
, c
;
509 obj
->idx
.offset
= consumed_bytes
;
510 input_crc32
= crc32(0, NULL
, 0);
515 obj
->type
= (c
>> 4) & 7;
522 size
+= (c
& 0x7f) << shift
;
529 oidread(ref_oid
, fill(the_hash_algo
->rawsz
));
530 use(the_hash_algo
->rawsz
);
536 base_offset
= c
& 127;
539 if (!base_offset
|| MSB(base_offset
, 7))
540 bad_object(obj
->idx
.offset
, _("offset value overflow for delta base object"));
544 base_offset
= (base_offset
<< 7) + (c
& 127);
546 *ofs_offset
= obj
->idx
.offset
- base_offset
;
547 if (*ofs_offset
<= 0 || *ofs_offset
>= obj
->idx
.offset
)
548 bad_object(obj
->idx
.offset
, _("delta base offset is out of bound"));
556 bad_object(obj
->idx
.offset
, _("unknown object type %d"), obj
->type
);
558 obj
->hdr_size
= consumed_bytes
- obj
->idx
.offset
;
560 data
= unpack_entry_data(obj
->idx
.offset
, obj
->size
, obj
->type
, oid
);
561 obj
->idx
.crc32
= input_crc32
;
565 static void *unpack_data(struct object_entry
*obj
,
566 int (*consume
)(const unsigned char *, unsigned long, void *),
569 off_t from
= obj
[0].idx
.offset
+ obj
[0].hdr_size
;
570 off_t len
= obj
[1].idx
.offset
- from
;
571 unsigned char *data
, *inbuf
;
575 data
= xmallocz(consume
? 64*1024 : obj
->size
);
576 inbuf
= xmalloc((len
< 64*1024) ? (int)len
: 64*1024);
578 memset(&stream
, 0, sizeof(stream
));
579 git_inflate_init(&stream
);
580 stream
.next_out
= data
;
581 stream
.avail_out
= consume
? 64*1024 : obj
->size
;
584 ssize_t n
= (len
< 64*1024) ? (ssize_t
)len
: 64*1024;
585 n
= xpread(get_thread_data()->pack_fd
, inbuf
, n
, from
);
587 die_errno(_("cannot pread pack file"));
589 die(Q_("premature end of pack file, %"PRIuMAX
" byte missing",
590 "premature end of pack file, %"PRIuMAX
" bytes missing",
595 stream
.next_in
= inbuf
;
598 status
= git_inflate(&stream
, 0);
601 status
= git_inflate(&stream
, 0);
602 if (consume(data
, stream
.next_out
- data
, cb_data
)) {
607 stream
.next_out
= data
;
608 stream
.avail_out
= 64*1024;
609 } while (status
== Z_OK
&& stream
.avail_in
);
611 } while (len
&& status
== Z_OK
&& !stream
.avail_in
);
613 /* This has been inflated OK when first encountered, so... */
614 if (status
!= Z_STREAM_END
|| stream
.total_out
!= obj
->size
)
615 die(_("serious inflate inconsistency"));
617 git_inflate_end(&stream
);
625 static void *get_data_from_pack(struct object_entry
*obj
)
627 return unpack_data(obj
, NULL
, NULL
);
630 static int compare_ofs_delta_bases(off_t offset1
, off_t offset2
,
631 enum object_type type1
,
632 enum object_type type2
)
634 int cmp
= type1
- type2
;
637 return offset1
< offset2
? -1 :
638 offset1
> offset2
? 1 :
642 static int find_ofs_delta(const off_t offset
)
644 int first
= 0, last
= nr_ofs_deltas
;
646 while (first
< last
) {
647 int next
= first
+ (last
- first
) / 2;
648 struct ofs_delta_entry
*delta
= &ofs_deltas
[next
];
651 cmp
= compare_ofs_delta_bases(offset
, delta
->offset
,
653 objects
[delta
->obj_no
].type
);
665 static void find_ofs_delta_children(off_t offset
,
666 int *first_index
, int *last_index
)
668 int first
= find_ofs_delta(offset
);
670 int end
= nr_ofs_deltas
- 1;
677 while (first
> 0 && ofs_deltas
[first
- 1].offset
== offset
)
679 while (last
< end
&& ofs_deltas
[last
+ 1].offset
== offset
)
681 *first_index
= first
;
685 static int compare_ref_delta_bases(const struct object_id
*oid1
,
686 const struct object_id
*oid2
,
687 enum object_type type1
,
688 enum object_type type2
)
690 int cmp
= type1
- type2
;
693 return oidcmp(oid1
, oid2
);
696 static int find_ref_delta(const struct object_id
*oid
)
698 int first
= 0, last
= nr_ref_deltas
;
700 while (first
< last
) {
701 int next
= first
+ (last
- first
) / 2;
702 struct ref_delta_entry
*delta
= &ref_deltas
[next
];
705 cmp
= compare_ref_delta_bases(oid
, &delta
->oid
,
707 objects
[delta
->obj_no
].type
);
719 static void find_ref_delta_children(const struct object_id
*oid
,
720 int *first_index
, int *last_index
)
722 int first
= find_ref_delta(oid
);
724 int end
= nr_ref_deltas
- 1;
731 while (first
> 0 && oideq(&ref_deltas
[first
- 1].oid
, oid
))
733 while (last
< end
&& oideq(&ref_deltas
[last
+ 1].oid
, oid
))
735 *first_index
= first
;
739 struct compare_data
{
740 struct object_entry
*entry
;
741 struct git_istream
*st
;
743 unsigned long buf_size
;
746 static int compare_objects(const unsigned char *buf
, unsigned long size
,
749 struct compare_data
*data
= cb_data
;
751 if (data
->buf_size
< size
) {
753 data
->buf
= xmalloc(size
);
754 data
->buf_size
= size
;
758 ssize_t len
= read_istream(data
->st
, data
->buf
, size
);
760 die(_("SHA1 COLLISION FOUND WITH %s !"),
761 oid_to_hex(&data
->entry
->idx
.oid
));
763 die(_("unable to read %s"),
764 oid_to_hex(&data
->entry
->idx
.oid
));
765 if (memcmp(buf
, data
->buf
, len
))
766 die(_("SHA1 COLLISION FOUND WITH %s !"),
767 oid_to_hex(&data
->entry
->idx
.oid
));
774 static int check_collison(struct object_entry
*entry
)
776 struct compare_data data
;
777 enum object_type type
;
780 if (entry
->size
<= big_file_threshold
|| entry
->type
!= OBJ_BLOB
)
783 memset(&data
, 0, sizeof(data
));
785 data
.st
= open_istream(the_repository
, &entry
->idx
.oid
, &type
, &size
,
789 if (size
!= entry
->size
|| type
!= entry
->type
)
790 die(_("SHA1 COLLISION FOUND WITH %s !"),
791 oid_to_hex(&entry
->idx
.oid
));
792 unpack_data(entry
, compare_objects
, &data
);
793 close_istream(data
.st
);
798 static void sha1_object(const void *data
, struct object_entry
*obj_entry
,
799 unsigned long size
, enum object_type type
,
800 const struct object_id
*oid
)
802 void *new_data
= NULL
;
803 int collision_test_needed
= 0;
805 assert(data
|| obj_entry
);
807 if (startup_info
->have_repository
) {
809 collision_test_needed
=
810 has_object_file_with_flags(oid
, OBJECT_INFO_QUICK
);
814 if (collision_test_needed
&& !data
) {
816 if (!check_collison(obj_entry
))
817 collision_test_needed
= 0;
820 if (collision_test_needed
) {
822 enum object_type has_type
;
823 unsigned long has_size
;
825 has_type
= oid_object_info(the_repository
, oid
, &has_size
);
827 die(_("cannot read existing object info %s"), oid_to_hex(oid
));
828 if (has_type
!= type
|| has_size
!= size
)
829 die(_("SHA1 COLLISION FOUND WITH %s !"), oid_to_hex(oid
));
830 has_data
= read_object_file(oid
, &has_type
, &has_size
);
833 data
= new_data
= get_data_from_pack(obj_entry
);
835 die(_("cannot read existing object %s"), oid_to_hex(oid
));
836 if (size
!= has_size
|| type
!= has_type
||
837 memcmp(data
, has_data
, size
) != 0)
838 die(_("SHA1 COLLISION FOUND WITH %s !"), oid_to_hex(oid
));
842 if (strict
|| do_fsck_object
) {
844 if (type
== OBJ_BLOB
) {
845 struct blob
*blob
= lookup_blob(the_repository
, oid
);
847 blob
->object
.flags
|= FLAG_CHECKED
;
849 die(_("invalid blob object %s"), oid_to_hex(oid
));
850 if (do_fsck_object
&&
851 fsck_object(&blob
->object
, (void *)data
, size
, &fsck_options
))
852 die(_("fsck error in packed object"));
856 void *buf
= (void *) data
;
858 assert(data
&& "data can only be NULL for large _blobs_");
861 * we do not need to free the memory here, as the
862 * buf is deleted by the caller.
864 obj
= parse_object_buffer(the_repository
, oid
, type
,
868 die(_("invalid %s"), type_name(type
));
869 if (do_fsck_object
&&
870 fsck_object(obj
, buf
, size
, &fsck_options
))
871 die(_("fsck error in packed object"));
872 if (strict
&& fsck_walk(obj
, NULL
, &fsck_options
))
873 die(_("Not all child objects of %s are reachable"), oid_to_hex(&obj
->oid
));
875 if (obj
->type
== OBJ_TREE
) {
876 struct tree
*item
= (struct tree
*) obj
;
880 if (obj
->type
== OBJ_COMMIT
) {
881 struct commit
*commit
= (struct commit
*) obj
;
882 if (detach_commit_buffer(commit
, NULL
) != data
)
883 BUG("parse_object_buffer transmogrified our buffer");
885 obj
->flags
|= FLAG_CHECKED
;
894 * Ensure that this node has been reconstructed and return its contents.
896 * In the typical and best case, this node would already be reconstructed
897 * (through the invocation to resolve_delta() in threaded_second_pass()) and it
898 * would not be pruned. However, if pruning of this node was necessary due to
899 * reaching delta_base_cache_limit, this function will find the closest
900 * ancestor with reconstructed data that has not been pruned (or if there is
901 * none, the ultimate base object), and reconstruct each node in the delta
902 * chain in order to generate the reconstructed data for this node.
904 static void *get_base_data(struct base_data
*c
)
907 struct object_entry
*obj
= c
->obj
;
908 struct base_data
**delta
= NULL
;
909 int delta_nr
= 0, delta_alloc
= 0;
911 while (is_delta_type(c
->obj
->type
) && !c
->data
) {
912 ALLOC_GROW(delta
, delta_nr
+ 1, delta_alloc
);
913 delta
[delta_nr
++] = c
;
917 c
->data
= get_data_from_pack(obj
);
919 base_cache_used
+= c
->size
;
922 for (; delta_nr
> 0; delta_nr
--) {
924 c
= delta
[delta_nr
- 1];
926 base
= get_base_data(c
->base
);
927 raw
= get_data_from_pack(obj
);
928 c
->data
= patch_delta(
934 bad_object(obj
->idx
.offset
, _("failed to apply delta"));
935 base_cache_used
+= c
->size
;
943 static struct base_data
*make_base(struct object_entry
*obj
,
944 struct base_data
*parent
)
946 struct base_data
*base
= xcalloc(1, sizeof(struct base_data
));
949 find_ref_delta_children(&obj
->idx
.oid
,
950 &base
->ref_first
, &base
->ref_last
);
951 find_ofs_delta_children(obj
->idx
.offset
,
952 &base
->ofs_first
, &base
->ofs_last
);
953 base
->children_remaining
= base
->ref_last
- base
->ref_first
+
954 base
->ofs_last
- base
->ofs_first
+ 2;
958 static struct base_data
*resolve_delta(struct object_entry
*delta_obj
,
959 struct base_data
*base
)
961 void *delta_data
, *result_data
;
962 struct base_data
*result
;
963 unsigned long result_size
;
966 int i
= delta_obj
- objects
;
967 int j
= base
->obj
- objects
;
968 obj_stat
[i
].delta_depth
= obj_stat
[j
].delta_depth
+ 1;
969 deepest_delta_lock();
970 if (deepest_delta
< obj_stat
[i
].delta_depth
)
971 deepest_delta
= obj_stat
[i
].delta_depth
;
972 deepest_delta_unlock();
973 obj_stat
[i
].base_object_no
= j
;
975 delta_data
= get_data_from_pack(delta_obj
);
977 result_data
= patch_delta(base
->data
, base
->size
,
978 delta_data
, delta_obj
->size
, &result_size
);
981 bad_object(delta_obj
->idx
.offset
, _("failed to apply delta"));
982 hash_object_file(the_hash_algo
, result_data
, result_size
,
983 delta_obj
->real_type
, &delta_obj
->idx
.oid
);
984 sha1_object(result_data
, NULL
, result_size
, delta_obj
->real_type
,
985 &delta_obj
->idx
.oid
);
987 result
= make_base(delta_obj
, base
);
988 result
->data
= result_data
;
989 result
->size
= result_size
;
992 nr_resolved_deltas
++;
998 static int compare_ofs_delta_entry(const void *a
, const void *b
)
1000 const struct ofs_delta_entry
*delta_a
= a
;
1001 const struct ofs_delta_entry
*delta_b
= b
;
1003 return delta_a
->offset
< delta_b
->offset
? -1 :
1004 delta_a
->offset
> delta_b
->offset
? 1 :
1008 static int compare_ref_delta_entry(const void *a
, const void *b
)
1010 const struct ref_delta_entry
*delta_a
= a
;
1011 const struct ref_delta_entry
*delta_b
= b
;
1013 return oidcmp(&delta_a
->oid
, &delta_b
->oid
);
1016 static void *threaded_second_pass(void *data
)
1019 set_thread_data(data
);
1021 struct base_data
*parent
= NULL
;
1022 struct object_entry
*child_obj
;
1023 struct base_data
*child
;
1026 display_progress(progress
, nr_resolved_deltas
);
1030 if (list_empty(&work_head
)) {
1032 * Take an object from the object array.
1034 while (nr_dispatched
< nr_objects
&&
1035 is_delta_type(objects
[nr_dispatched
].type
))
1037 if (nr_dispatched
>= nr_objects
) {
1041 child_obj
= &objects
[nr_dispatched
++];
1044 * Peek at the top of the stack, and take a child from
1047 parent
= list_first_entry(&work_head
, struct base_data
,
1050 if (parent
->ref_first
<= parent
->ref_last
) {
1051 int offset
= ref_deltas
[parent
->ref_first
++].obj_no
;
1052 child_obj
= objects
+ offset
;
1053 if (child_obj
->real_type
!= OBJ_REF_DELTA
)
1054 die("REF_DELTA at offset %"PRIuMAX
" already resolved (duplicate base %s?)",
1055 (uintmax_t) child_obj
->idx
.offset
,
1056 oid_to_hex(&parent
->obj
->idx
.oid
));
1057 child_obj
->real_type
= parent
->obj
->real_type
;
1059 child_obj
= objects
+
1060 ofs_deltas
[parent
->ofs_first
++].obj_no
;
1061 assert(child_obj
->real_type
== OBJ_OFS_DELTA
);
1062 child_obj
->real_type
= parent
->obj
->real_type
;
1065 if (parent
->ref_first
> parent
->ref_last
&&
1066 parent
->ofs_first
> parent
->ofs_last
) {
1068 * This parent has run out of children, so move
1071 list_del(&parent
->list
);
1072 list_add(&parent
->list
, &done_head
);
1076 * Ensure that the parent has data, since we will need
1079 * NEEDSWORK: If parent data needs to be reloaded, this
1080 * prolongs the time that the current thread spends in
1081 * the mutex. A mitigating factor is that parent data
1082 * needs to be reloaded only if the delta base cache
1083 * limit is exceeded, so in the typical case, this does
1086 get_base_data(parent
);
1087 parent
->retain_data
++;
1092 child
= resolve_delta(child_obj
, parent
);
1093 if (!child
->children_remaining
)
1094 FREE_AND_NULL(child
->data
);
1096 child
= make_base(child_obj
, NULL
);
1097 if (child
->children_remaining
) {
1099 * Since this child has its own delta children,
1100 * we will need this data in the future.
1101 * Inflate now so that future iterations will
1102 * have access to this object's data while
1103 * outside the work mutex.
1105 child
->data
= get_data_from_pack(child_obj
);
1106 child
->size
= child_obj
->size
;
1112 parent
->retain_data
--;
1115 * This child has its own children, so add it to
1118 list_add(&child
->list
, &work_head
);
1119 base_cache_used
+= child
->size
;
1120 prune_base_data(NULL
);
1121 free_base_data(child
);
1124 * This child does not have its own children. It may be
1125 * the last descendant of its ancestors; free those
1128 struct base_data
*p
= parent
;
1131 struct base_data
*next_p
;
1133 p
->children_remaining
--;
1134 if (p
->children_remaining
)
1144 FREE_AND_NULL(child
);
1153 * - find locations of all objects;
1154 * - calculate SHA1 of all non-delta objects;
1155 * - remember base (SHA1 or offset) for all deltas.
1157 static void parse_pack_objects(unsigned char *hash
)
1159 int i
, nr_delays
= 0;
1160 struct ofs_delta_entry
*ofs_delta
= ofs_deltas
;
1161 struct object_id ref_delta_oid
;
1165 progress
= start_progress(
1166 progress_title
? progress_title
:
1167 from_stdin
? _("Receiving objects") : _("Indexing objects"),
1169 for (i
= 0; i
< nr_objects
; i
++) {
1170 struct object_entry
*obj
= &objects
[i
];
1171 void *data
= unpack_raw_entry(obj
, &ofs_delta
->offset
,
1174 obj
->real_type
= obj
->type
;
1175 if (obj
->type
== OBJ_OFS_DELTA
) {
1177 ofs_delta
->obj_no
= i
;
1179 } else if (obj
->type
== OBJ_REF_DELTA
) {
1180 ALLOC_GROW(ref_deltas
, nr_ref_deltas
+ 1, ref_deltas_alloc
);
1181 oidcpy(&ref_deltas
[nr_ref_deltas
].oid
, &ref_delta_oid
);
1182 ref_deltas
[nr_ref_deltas
].obj_no
= i
;
1185 /* large blobs, check later */
1186 obj
->real_type
= OBJ_BAD
;
1189 sha1_object(data
, NULL
, obj
->size
, obj
->type
,
1192 display_progress(progress
, i
+1);
1194 objects
[i
].idx
.offset
= consumed_bytes
;
1195 stop_progress(&progress
);
1197 /* Check pack integrity */
1199 the_hash_algo
->final_fn(hash
, &input_ctx
);
1200 if (!hasheq(fill(the_hash_algo
->rawsz
), hash
))
1201 die(_("pack is corrupted (SHA1 mismatch)"));
1202 use(the_hash_algo
->rawsz
);
1204 /* If input_fd is a file, we should have reached its end now. */
1205 if (fstat(input_fd
, &st
))
1206 die_errno(_("cannot fstat packfile"));
1207 if (S_ISREG(st
.st_mode
) &&
1208 lseek(input_fd
, 0, SEEK_CUR
) - input_len
!= st
.st_size
)
1209 die(_("pack has junk at the end"));
1211 for (i
= 0; i
< nr_objects
; i
++) {
1212 struct object_entry
*obj
= &objects
[i
];
1213 if (obj
->real_type
!= OBJ_BAD
)
1215 obj
->real_type
= obj
->type
;
1216 sha1_object(NULL
, obj
, obj
->size
, obj
->type
,
1221 die(_("confusion beyond insanity in parse_pack_objects()"));
1226 * - for all non-delta objects, look if it is used as a base for
1228 * - if used as a base, uncompress the object and apply all deltas,
1229 * recursively checking if the resulting object is used as a base
1230 * for some more deltas.
1232 static void resolve_deltas(void)
1236 if (!nr_ofs_deltas
&& !nr_ref_deltas
)
1239 /* Sort deltas by base SHA1/offset for fast searching */
1240 QSORT(ofs_deltas
, nr_ofs_deltas
, compare_ofs_delta_entry
);
1241 QSORT(ref_deltas
, nr_ref_deltas
, compare_ref_delta_entry
);
1243 if (verbose
|| show_resolving_progress
)
1244 progress
= start_progress(_("Resolving deltas"),
1245 nr_ref_deltas
+ nr_ofs_deltas
);
1248 base_cache_limit
= delta_base_cache_limit
* nr_threads
;
1249 if (nr_threads
> 1 || getenv("GIT_FORCE_THREADS")) {
1251 for (i
= 0; i
< nr_threads
; i
++) {
1252 int ret
= pthread_create(&thread_data
[i
].thread
, NULL
,
1253 threaded_second_pass
, thread_data
+ i
);
1255 die(_("unable to create thread: %s"),
1258 for (i
= 0; i
< nr_threads
; i
++)
1259 pthread_join(thread_data
[i
].thread
, NULL
);
1263 threaded_second_pass(¬hread_data
);
1268 * - append objects to convert thin pack to full pack if required
1269 * - write the final pack hash
1271 static void fix_unresolved_deltas(struct hashfile
*f
);
1272 static void conclude_pack(int fix_thin_pack
, const char *curr_pack
, unsigned char *pack_hash
)
1274 if (nr_ref_deltas
+ nr_ofs_deltas
== nr_resolved_deltas
) {
1275 stop_progress(&progress
);
1276 /* Flush remaining pack final hash. */
1281 if (fix_thin_pack
) {
1283 unsigned char read_hash
[GIT_MAX_RAWSZ
], tail_hash
[GIT_MAX_RAWSZ
];
1284 struct strbuf msg
= STRBUF_INIT
;
1285 int nr_unresolved
= nr_ofs_deltas
+ nr_ref_deltas
- nr_resolved_deltas
;
1286 int nr_objects_initial
= nr_objects
;
1287 if (nr_unresolved
<= 0)
1288 die(_("confusion beyond insanity"));
1289 REALLOC_ARRAY(objects
, nr_objects
+ nr_unresolved
+ 1);
1290 memset(objects
+ nr_objects
+ 1, 0,
1291 nr_unresolved
* sizeof(*objects
));
1292 f
= hashfd(output_fd
, curr_pack
);
1293 fix_unresolved_deltas(f
);
1294 strbuf_addf(&msg
, Q_("completed with %d local object",
1295 "completed with %d local objects",
1296 nr_objects
- nr_objects_initial
),
1297 nr_objects
- nr_objects_initial
);
1298 stop_progress_msg(&progress
, msg
.buf
);
1299 strbuf_release(&msg
);
1300 finalize_hashfile(f
, tail_hash
, FSYNC_COMPONENT_PACK
, 0);
1301 hashcpy(read_hash
, pack_hash
);
1302 fixup_pack_header_footer(output_fd
, pack_hash
,
1303 curr_pack
, nr_objects
,
1304 read_hash
, consumed_bytes
-the_hash_algo
->rawsz
);
1305 if (!hasheq(read_hash
, tail_hash
))
1306 die(_("Unexpected tail checksum for %s "
1307 "(disk corruption?)"), curr_pack
);
1309 if (nr_ofs_deltas
+ nr_ref_deltas
!= nr_resolved_deltas
)
1310 die(Q_("pack has %d unresolved delta",
1311 "pack has %d unresolved deltas",
1312 nr_ofs_deltas
+ nr_ref_deltas
- nr_resolved_deltas
),
1313 nr_ofs_deltas
+ nr_ref_deltas
- nr_resolved_deltas
);
1316 static int write_compressed(struct hashfile
*f
, void *in
, unsigned int size
)
1320 unsigned char outbuf
[4096];
1322 git_deflate_init(&stream
, zlib_compression_level
);
1323 stream
.next_in
= in
;
1324 stream
.avail_in
= size
;
1327 stream
.next_out
= outbuf
;
1328 stream
.avail_out
= sizeof(outbuf
);
1329 status
= git_deflate(&stream
, Z_FINISH
);
1330 hashwrite(f
, outbuf
, sizeof(outbuf
) - stream
.avail_out
);
1331 } while (status
== Z_OK
);
1333 if (status
!= Z_STREAM_END
)
1334 die(_("unable to deflate appended object (%d)"), status
);
1335 size
= stream
.total_out
;
1336 git_deflate_end(&stream
);
1340 static struct object_entry
*append_obj_to_pack(struct hashfile
*f
,
1341 const unsigned char *sha1
, void *buf
,
1342 unsigned long size
, enum object_type type
)
1344 struct object_entry
*obj
= &objects
[nr_objects
++];
1345 unsigned char header
[10];
1346 unsigned long s
= size
;
1348 unsigned char c
= (type
<< 4) | (s
& 15);
1351 header
[n
++] = c
| 0x80;
1357 hashwrite(f
, header
, n
);
1359 obj
[0].hdr_size
= n
;
1361 obj
[0].real_type
= type
;
1362 obj
[1].idx
.offset
= obj
[0].idx
.offset
+ n
;
1363 obj
[1].idx
.offset
+= write_compressed(f
, buf
, size
);
1364 obj
[0].idx
.crc32
= crc32_end(f
);
1366 oidread(&obj
->idx
.oid
, sha1
);
1370 static int delta_pos_compare(const void *_a
, const void *_b
)
1372 struct ref_delta_entry
*a
= *(struct ref_delta_entry
**)_a
;
1373 struct ref_delta_entry
*b
= *(struct ref_delta_entry
**)_b
;
1374 return a
->obj_no
- b
->obj_no
;
1377 static void fix_unresolved_deltas(struct hashfile
*f
)
1379 struct ref_delta_entry
**sorted_by_pos
;
1383 * Since many unresolved deltas may well be themselves base objects
1384 * for more unresolved deltas, we really want to include the
1385 * smallest number of base objects that would cover as much delta
1386 * as possible by picking the
1387 * trunc deltas first, allowing for other deltas to resolve without
1388 * additional base objects. Since most base objects are to be found
1389 * before deltas depending on them, a good heuristic is to start
1390 * resolving deltas in the same order as their position in the pack.
1392 ALLOC_ARRAY(sorted_by_pos
, nr_ref_deltas
);
1393 for (i
= 0; i
< nr_ref_deltas
; i
++)
1394 sorted_by_pos
[i
] = &ref_deltas
[i
];
1395 QSORT(sorted_by_pos
, nr_ref_deltas
, delta_pos_compare
);
1397 if (has_promisor_remote()) {
1399 * Prefetch the delta bases.
1401 struct oid_array to_fetch
= OID_ARRAY_INIT
;
1402 for (i
= 0; i
< nr_ref_deltas
; i
++) {
1403 struct ref_delta_entry
*d
= sorted_by_pos
[i
];
1404 if (!oid_object_info_extended(the_repository
, &d
->oid
,
1406 OBJECT_INFO_FOR_PREFETCH
))
1408 oid_array_append(&to_fetch
, &d
->oid
);
1410 promisor_remote_get_direct(the_repository
,
1411 to_fetch
.oid
, to_fetch
.nr
);
1412 oid_array_clear(&to_fetch
);
1415 for (i
= 0; i
< nr_ref_deltas
; i
++) {
1416 struct ref_delta_entry
*d
= sorted_by_pos
[i
];
1417 enum object_type type
;
1421 if (objects
[d
->obj_no
].real_type
!= OBJ_REF_DELTA
)
1423 data
= read_object_file(&d
->oid
, &type
, &size
);
1427 if (check_object_signature(the_repository
, &d
->oid
, data
, size
,
1429 die(_("local object %s is corrupt"), oid_to_hex(&d
->oid
));
1432 * Add this as an object to the objects array and call
1433 * threaded_second_pass() (which will pick up the added
1436 append_obj_to_pack(f
, d
->oid
.hash
, data
, size
, type
);
1438 threaded_second_pass(NULL
);
1440 display_progress(progress
, nr_resolved_deltas
);
1442 free(sorted_by_pos
);
1445 static const char *derive_filename(const char *pack_name
, const char *strip
,
1446 const char *suffix
, struct strbuf
*buf
)
1449 if (!strip_suffix(pack_name
, strip
, &len
) || !len
||
1450 pack_name
[len
- 1] != '.')
1451 die(_("packfile name '%s' does not end with '.%s'"),
1453 strbuf_add(buf
, pack_name
, len
);
1454 strbuf_addstr(buf
, suffix
);
1458 static void write_special_file(const char *suffix
, const char *msg
,
1459 const char *pack_name
, const unsigned char *hash
,
1460 const char **report
)
1462 struct strbuf name_buf
= STRBUF_INIT
;
1463 const char *filename
;
1465 int msg_len
= strlen(msg
);
1468 filename
= derive_filename(pack_name
, "pack", suffix
, &name_buf
);
1470 filename
= odb_pack_name(&name_buf
, hash
, suffix
);
1472 fd
= odb_pack_keep(filename
);
1474 if (errno
!= EEXIST
)
1475 die_errno(_("cannot write %s file '%s'"),
1479 write_or_die(fd
, msg
, msg_len
);
1480 write_or_die(fd
, "\n", 1);
1483 die_errno(_("cannot close written %s file '%s'"),
1488 strbuf_release(&name_buf
);
1491 static void rename_tmp_packfile(const char **final_name
,
1492 const char *curr_name
,
1493 struct strbuf
*name
, unsigned char *hash
,
1494 const char *ext
, int make_read_only_if_same
)
1496 if (*final_name
!= curr_name
) {
1498 *final_name
= odb_pack_name(name
, hash
, ext
);
1499 if (finalize_object_file(curr_name
, *final_name
))
1500 die(_("unable to rename temporary '*.%s' file to '%s'"),
1502 } else if (make_read_only_if_same
) {
1503 chmod(*final_name
, 0444);
1507 static void final(const char *final_pack_name
, const char *curr_pack_name
,
1508 const char *final_index_name
, const char *curr_index_name
,
1509 const char *final_rev_index_name
, const char *curr_rev_index_name
,
1510 const char *keep_msg
, const char *promisor_msg
,
1511 unsigned char *hash
)
1513 const char *report
= "pack";
1514 struct strbuf pack_name
= STRBUF_INIT
;
1515 struct strbuf index_name
= STRBUF_INIT
;
1516 struct strbuf rev_index_name
= STRBUF_INIT
;
1522 fsync_component_or_die(FSYNC_COMPONENT_PACK
, output_fd
, curr_pack_name
);
1523 err
= close(output_fd
);
1525 die_errno(_("error while closing pack file"));
1529 write_special_file("keep", keep_msg
, final_pack_name
, hash
,
1532 write_special_file("promisor", promisor_msg
, final_pack_name
,
1535 rename_tmp_packfile(&final_pack_name
, curr_pack_name
, &pack_name
,
1536 hash
, "pack", from_stdin
);
1537 if (curr_rev_index_name
)
1538 rename_tmp_packfile(&final_rev_index_name
, curr_rev_index_name
,
1539 &rev_index_name
, hash
, "rev", 1);
1540 rename_tmp_packfile(&final_index_name
, curr_index_name
, &index_name
,
1543 if (do_fsck_object
) {
1544 struct packed_git
*p
;
1545 p
= add_packed_git(final_index_name
, strlen(final_index_name
), 0);
1547 install_packed_git(the_repository
, p
);
1551 printf("%s\n", hash_to_hex(hash
));
1553 struct strbuf buf
= STRBUF_INIT
;
1555 strbuf_addf(&buf
, "%s\t%s\n", report
, hash_to_hex(hash
));
1556 write_or_die(1, buf
.buf
, buf
.len
);
1557 strbuf_release(&buf
);
1560 * Let's just mimic git-unpack-objects here and write
1561 * the last part of the input buffer to stdout.
1564 err
= xwrite(1, input_buffer
+ input_offset
, input_len
);
1568 input_offset
+= err
;
1572 strbuf_release(&rev_index_name
);
1573 strbuf_release(&index_name
);
1574 strbuf_release(&pack_name
);
1577 static int git_index_pack_config(const char *k
, const char *v
, void *cb
)
1579 struct pack_idx_option
*opts
= cb
;
1581 if (!strcmp(k
, "pack.indexversion")) {
1582 opts
->version
= git_config_int(k
, v
);
1583 if (opts
->version
> 2)
1584 die(_("bad pack.indexVersion=%"PRIu32
), opts
->version
);
1587 if (!strcmp(k
, "pack.threads")) {
1588 nr_threads
= git_config_int(k
, v
);
1590 die(_("invalid number of threads specified (%d)"),
1592 if (!HAVE_THREADS
&& nr_threads
!= 1) {
1593 warning(_("no threads support, ignoring %s"), k
);
1598 if (!strcmp(k
, "pack.writereverseindex")) {
1599 if (git_config_bool(k
, v
))
1600 opts
->flags
|= WRITE_REV
;
1602 opts
->flags
&= ~WRITE_REV
;
1604 return git_default_config(k
, v
, cb
);
1607 static int cmp_uint32(const void *a_
, const void *b_
)
1609 uint32_t a
= *((uint32_t *)a_
);
1610 uint32_t b
= *((uint32_t *)b_
);
1612 return (a
< b
) ? -1 : (a
!= b
);
1615 static void read_v2_anomalous_offsets(struct packed_git
*p
,
1616 struct pack_idx_option
*opts
)
1618 const uint32_t *idx1
, *idx2
;
1621 /* The address of the 4-byte offset table */
1622 idx1
= (((const uint32_t *)((const uint8_t *)p
->index_data
+ p
->crc_offset
))
1623 + (size_t)p
->num_objects
/* CRC32 table */
1626 /* The address of the 8-byte offset table */
1627 idx2
= idx1
+ p
->num_objects
;
1629 for (i
= 0; i
< p
->num_objects
; i
++) {
1630 uint32_t off
= ntohl(idx1
[i
]);
1631 if (!(off
& 0x80000000))
1633 off
= off
& 0x7fffffff;
1634 check_pack_index_ptr(p
, &idx2
[off
* 2]);
1638 * The real offset is ntohl(idx2[off * 2]) in high 4
1639 * octets, and ntohl(idx2[off * 2 + 1]) in low 4
1640 * octets. But idx2[off * 2] is Zero!!!
1642 ALLOC_GROW(opts
->anomaly
, opts
->anomaly_nr
+ 1, opts
->anomaly_alloc
);
1643 opts
->anomaly
[opts
->anomaly_nr
++] = ntohl(idx2
[off
* 2 + 1]);
1646 QSORT(opts
->anomaly
, opts
->anomaly_nr
, cmp_uint32
);
1649 static void read_idx_option(struct pack_idx_option
*opts
, const char *pack_name
)
1651 struct packed_git
*p
= add_packed_git(pack_name
, strlen(pack_name
), 1);
1654 die(_("Cannot open existing pack file '%s'"), pack_name
);
1655 if (open_pack_index(p
))
1656 die(_("Cannot open existing pack idx file for '%s'"), pack_name
);
1658 /* Read the attributes from the existing idx file */
1659 opts
->version
= p
->index_version
;
1661 if (opts
->version
== 2)
1662 read_v2_anomalous_offsets(p
, opts
);
1665 * Get rid of the idx file as we do not need it anymore.
1666 * NEEDSWORK: extract this bit from free_pack_by_name() in
1667 * object-file.c, perhaps? It shouldn't matter very much as we
1668 * know we haven't installed this pack (hence we never have
1669 * read anything from it).
1671 close_pack_index(p
);
1675 static void show_pack_info(int stat_only
)
1677 int i
, baseobjects
= nr_objects
- nr_ref_deltas
- nr_ofs_deltas
;
1678 unsigned long *chain_histogram
= NULL
;
1681 CALLOC_ARRAY(chain_histogram
, deepest_delta
);
1683 for (i
= 0; i
< nr_objects
; i
++) {
1684 struct object_entry
*obj
= &objects
[i
];
1686 if (is_delta_type(obj
->type
))
1687 chain_histogram
[obj_stat
[i
].delta_depth
- 1]++;
1690 printf("%s %-6s %"PRIuMAX
" %"PRIuMAX
" %"PRIuMAX
,
1691 oid_to_hex(&obj
->idx
.oid
),
1692 type_name(obj
->real_type
), (uintmax_t)obj
->size
,
1693 (uintmax_t)(obj
[1].idx
.offset
- obj
->idx
.offset
),
1694 (uintmax_t)obj
->idx
.offset
);
1695 if (is_delta_type(obj
->type
)) {
1696 struct object_entry
*bobj
= &objects
[obj_stat
[i
].base_object_no
];
1697 printf(" %u %s", obj_stat
[i
].delta_depth
,
1698 oid_to_hex(&bobj
->idx
.oid
));
1704 printf_ln(Q_("non delta: %d object",
1705 "non delta: %d objects",
1708 for (i
= 0; i
< deepest_delta
; i
++) {
1709 if (!chain_histogram
[i
])
1711 printf_ln(Q_("chain length = %d: %lu object",
1712 "chain length = %d: %lu objects",
1713 chain_histogram
[i
]),
1715 chain_histogram
[i
]);
1717 free(chain_histogram
);
1720 int cmd_index_pack(int argc
, const char **argv
, const char *prefix
)
1722 int i
, fix_thin_pack
= 0, verify
= 0, stat_only
= 0, rev_index
;
1723 const char *curr_index
;
1724 const char *curr_rev_index
= NULL
;
1725 const char *index_name
= NULL
, *pack_name
= NULL
, *rev_index_name
= NULL
;
1726 const char *keep_msg
= NULL
;
1727 const char *promisor_msg
= NULL
;
1728 struct strbuf index_name_buf
= STRBUF_INIT
;
1729 struct strbuf rev_index_name_buf
= STRBUF_INIT
;
1730 struct pack_idx_entry
**idx_objects
;
1731 struct pack_idx_option opts
;
1732 unsigned char pack_hash
[GIT_MAX_RAWSZ
];
1733 unsigned foreign_nr
= 1; /* zero is a "good" value, assume bad */
1734 int report_end_of_input
= 0;
1738 * index-pack never needs to fetch missing objects except when
1739 * REF_DELTA bases are missing (which are explicitly handled). It only
1740 * accesses the repo to do hash collision checks and to check which
1741 * REF_DELTA bases need to be fetched.
1743 fetch_if_missing
= 0;
1745 if (argc
== 2 && !strcmp(argv
[1], "-h"))
1746 usage(index_pack_usage
);
1748 read_replace_refs
= 0;
1749 fsck_options
.walk
= mark_link
;
1751 reset_pack_idx_option(&opts
);
1752 git_config(git_index_pack_config
, &opts
);
1753 if (prefix
&& chdir(prefix
))
1754 die(_("Cannot come back to cwd"));
1756 if (git_env_bool(GIT_TEST_WRITE_REV_INDEX
, 0))
1759 rev_index
= !!(opts
.flags
& (WRITE_REV_VERIFY
| WRITE_REV
));
1761 for (i
= 1; i
< argc
; i
++) {
1762 const char *arg
= argv
[i
];
1765 if (!strcmp(arg
, "--stdin")) {
1767 } else if (!strcmp(arg
, "--fix-thin")) {
1769 } else if (skip_to_optional_arg(arg
, "--strict", &arg
)) {
1772 fsck_set_msg_types(&fsck_options
, arg
);
1773 } else if (!strcmp(arg
, "--check-self-contained-and-connected")) {
1775 check_self_contained_and_connected
= 1;
1776 } else if (!strcmp(arg
, "--fsck-objects")) {
1778 } else if (!strcmp(arg
, "--verify")) {
1780 } else if (!strcmp(arg
, "--verify-stat")) {
1783 } else if (!strcmp(arg
, "--verify-stat-only")) {
1787 } else if (skip_to_optional_arg(arg
, "--keep", &keep_msg
)) {
1788 ; /* nothing to do */
1789 } else if (skip_to_optional_arg(arg
, "--promisor", &promisor_msg
)) {
1790 ; /* already parsed */
1791 } else if (starts_with(arg
, "--threads=")) {
1793 nr_threads
= strtoul(arg
+10, &end
, 0);
1794 if (!arg
[10] || *end
|| nr_threads
< 0)
1795 usage(index_pack_usage
);
1796 if (!HAVE_THREADS
&& nr_threads
!= 1) {
1797 warning(_("no threads support, ignoring %s"), arg
);
1800 } else if (starts_with(arg
, "--pack_header=")) {
1801 struct pack_header
*hdr
;
1804 hdr
= (struct pack_header
*)input_buffer
;
1805 hdr
->hdr_signature
= htonl(PACK_SIGNATURE
);
1806 hdr
->hdr_version
= htonl(strtoul(arg
+ 14, &c
, 10));
1808 die(_("bad %s"), arg
);
1809 hdr
->hdr_entries
= htonl(strtoul(c
+ 1, &c
, 10));
1811 die(_("bad %s"), arg
);
1812 input_len
= sizeof(*hdr
);
1813 } else if (!strcmp(arg
, "-v")) {
1815 } else if (!strcmp(arg
, "--progress-title")) {
1816 if (progress_title
|| (i
+1) >= argc
)
1817 usage(index_pack_usage
);
1818 progress_title
= argv
[++i
];
1819 } else if (!strcmp(arg
, "--show-resolving-progress")) {
1820 show_resolving_progress
= 1;
1821 } else if (!strcmp(arg
, "--report-end-of-input")) {
1822 report_end_of_input
= 1;
1823 } else if (!strcmp(arg
, "-o")) {
1824 if (index_name
|| (i
+1) >= argc
)
1825 usage(index_pack_usage
);
1826 index_name
= argv
[++i
];
1827 } else if (starts_with(arg
, "--index-version=")) {
1829 opts
.version
= strtoul(arg
+ 16, &c
, 10);
1830 if (opts
.version
> 2)
1831 die(_("bad %s"), arg
);
1833 opts
.off32_limit
= strtoul(c
+1, &c
, 0);
1834 if (*c
|| opts
.off32_limit
& 0x80000000)
1835 die(_("bad %s"), arg
);
1836 } else if (skip_prefix(arg
, "--max-input-size=", &arg
)) {
1837 max_input_size
= strtoumax(arg
, NULL
, 10);
1838 } else if (skip_prefix(arg
, "--object-format=", &arg
)) {
1839 hash_algo
= hash_algo_by_name(arg
);
1840 if (hash_algo
== GIT_HASH_UNKNOWN
)
1841 die(_("unknown hash algorithm '%s'"), arg
);
1842 repo_set_hash_algo(the_repository
, hash_algo
);
1843 } else if (!strcmp(arg
, "--rev-index")) {
1845 } else if (!strcmp(arg
, "--no-rev-index")) {
1848 usage(index_pack_usage
);
1853 usage(index_pack_usage
);
1857 if (!pack_name
&& !from_stdin
)
1858 usage(index_pack_usage
);
1859 if (fix_thin_pack
&& !from_stdin
)
1860 die(_("the option '%s' requires '%s'"), "--fix-thin", "--stdin");
1861 if (from_stdin
&& !startup_info
->have_repository
)
1862 die(_("--stdin requires a git repository"));
1863 if (from_stdin
&& hash_algo
)
1864 die(_("options '%s' and '%s' cannot be used together"), "--object-format", "--stdin");
1865 if (!index_name
&& pack_name
)
1866 index_name
= derive_filename(pack_name
, "pack", "idx", &index_name_buf
);
1868 opts
.flags
&= ~(WRITE_REV
| WRITE_REV_VERIFY
);
1870 opts
.flags
|= verify
? WRITE_REV_VERIFY
: WRITE_REV
;
1872 rev_index_name
= derive_filename(index_name
,
1874 &rev_index_name_buf
);
1879 die(_("--verify with no packfile name given"));
1880 read_idx_option(&opts
, index_name
);
1881 opts
.flags
|= WRITE_IDX_VERIFY
| WRITE_IDX_STRICT
;
1884 opts
.flags
|= WRITE_IDX_STRICT
;
1886 if (HAVE_THREADS
&& !nr_threads
) {
1887 nr_threads
= online_cpus();
1889 * Experiments show that going above 20 threads doesn't help,
1890 * no matter how many cores you have. Below that, we tend to
1891 * max at half the number of online_cpus(), presumably because
1892 * half of those are hyperthreads rather than full cores. We'll
1893 * never reduce the level below "3", though, to match a
1894 * historical value that nobody complained about.
1897 ; /* too few cores to consider capping */
1898 else if (nr_threads
< 6)
1899 nr_threads
= 3; /* historic cap */
1900 else if (nr_threads
< 40)
1903 nr_threads
= 20; /* hard cap */
1906 curr_pack
= open_pack_file(pack_name
);
1907 parse_pack_header();
1908 CALLOC_ARRAY(objects
, st_add(nr_objects
, 1));
1910 CALLOC_ARRAY(obj_stat
, st_add(nr_objects
, 1));
1911 CALLOC_ARRAY(ofs_deltas
, nr_objects
);
1912 parse_pack_objects(pack_hash
);
1913 if (report_end_of_input
)
1914 write_in_full(2, "\0", 1);
1916 conclude_pack(fix_thin_pack
, curr_pack
, pack_hash
);
1920 foreign_nr
= check_objects();
1923 show_pack_info(stat_only
);
1925 ALLOC_ARRAY(idx_objects
, nr_objects
);
1926 for (i
= 0; i
< nr_objects
; i
++)
1927 idx_objects
[i
] = &objects
[i
].idx
;
1928 curr_index
= write_idx_file(index_name
, idx_objects
, nr_objects
, &opts
, pack_hash
);
1930 curr_rev_index
= write_rev_file(rev_index_name
, idx_objects
,
1931 nr_objects
, pack_hash
,
1936 final(pack_name
, curr_pack
,
1937 index_name
, curr_index
,
1938 rev_index_name
, curr_rev_index
,
1939 keep_msg
, promisor_msg
,
1944 if (do_fsck_object
&& fsck_finish(&fsck_options
))
1945 die(_("fsck error in pack objects"));
1949 strbuf_release(&index_name_buf
);
1950 strbuf_release(&rev_index_name_buf
);
1952 free((void *) curr_pack
);
1954 free((void *) curr_index
);
1955 if (!rev_index_name
)
1956 free((void *) curr_rev_index
);
1959 * Let the caller know this pack is not self contained
1961 if (check_self_contained_and_connected
&& foreign_nr
)