mirror of
https://github.com/git/git
synced 2024-10-30 14:03:28 +00:00
83296d20e8
Further prepare for enabling verbatim pack-reuse over multiple packfiles by changing the signature of reuse_partial_packfile_from_bitmap() to populate an array of `struct bitmapped_pack *`'s instead of a pointer to a single packfile. Since the array we're filling out is sized dynamically[^1], add an additional `size_t *` parameter which will hold the number of reusable packs (equal to the number of elements in the array). Note that since we still have not implemented true multi-pack reuse, these changes aren't propagated out to the rest of the caller in builtin/pack-objects.c. In the interim state, we expect that the array has a single element, and we use that element to fill out the static `reuse_packfile` variable (which is a bog-standard `struct packed_git *`). Future commits will continue to push this change further out through the pack-objects code. [^1]: That is, even though we know the number of packs which are candidates for pack-reuse, we do not know how many of those candidates we can actually reuse. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
129 lines
4 KiB
C
129 lines
4 KiB
C
#ifndef PACK_BITMAP_H
|
|
#define PACK_BITMAP_H
|
|
|
|
#include "ewah/ewok.h"
|
|
#include "khash.h"
|
|
#include "pack.h"
|
|
#include "pack-objects.h"
|
|
#include "string-list.h"
|
|
|
|
struct commit;
|
|
struct repository;
|
|
struct rev_info;
|
|
|
|
static const char BITMAP_IDX_SIGNATURE[] = {'B', 'I', 'T', 'M'};
|
|
|
|
struct bitmap_disk_header {
|
|
char magic[ARRAY_SIZE(BITMAP_IDX_SIGNATURE)];
|
|
uint16_t version;
|
|
uint16_t options;
|
|
uint32_t entry_count;
|
|
unsigned char checksum[GIT_MAX_RAWSZ];
|
|
};
|
|
|
|
#define NEEDS_BITMAP (1u<<22)
|
|
|
|
/*
|
|
* The width in bytes of a single triplet in the lookup table
|
|
* extension:
|
|
* (commit_pos, offset, xor_row)
|
|
*
|
|
* whose fields ar 32-, 64-, 32- bits wide, respectively.
|
|
*/
|
|
#define BITMAP_LOOKUP_TABLE_TRIPLET_WIDTH (16)
|
|
|
|
enum pack_bitmap_opts {
|
|
BITMAP_OPT_FULL_DAG = 0x1,
|
|
BITMAP_OPT_HASH_CACHE = 0x4,
|
|
BITMAP_OPT_LOOKUP_TABLE = 0x10,
|
|
};
|
|
|
|
enum pack_bitmap_flags {
|
|
BITMAP_FLAG_REUSE = 0x1
|
|
};
|
|
|
|
typedef int (*show_reachable_fn)(
|
|
const struct object_id *oid,
|
|
enum object_type type,
|
|
int flags,
|
|
uint32_t hash,
|
|
struct packed_git *found_pack,
|
|
off_t found_offset);
|
|
|
|
struct bitmap_index;
|
|
|
|
struct bitmapped_pack {
|
|
struct packed_git *p;
|
|
|
|
uint32_t bitmap_pos;
|
|
uint32_t bitmap_nr;
|
|
|
|
uint32_t pack_int_id; /* MIDX only */
|
|
};
|
|
|
|
struct bitmap_index *prepare_bitmap_git(struct repository *r);
|
|
struct bitmap_index *prepare_midx_bitmap_git(struct multi_pack_index *midx);
|
|
void count_bitmap_commit_list(struct bitmap_index *, uint32_t *commits,
|
|
uint32_t *trees, uint32_t *blobs, uint32_t *tags);
|
|
void traverse_bitmap_commit_list(struct bitmap_index *,
|
|
struct rev_info *revs,
|
|
show_reachable_fn show_reachable);
|
|
void test_bitmap_walk(struct rev_info *revs);
|
|
int test_bitmap_commits(struct repository *r);
|
|
int test_bitmap_hashes(struct repository *r);
|
|
|
|
#define GIT_TEST_PACK_USE_BITMAP_BOUNDARY_TRAVERSAL \
|
|
"GIT_TEST_PACK_USE_BITMAP_BOUNDARY_TRAVERSAL"
|
|
|
|
struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs,
|
|
int filter_provided_objects);
|
|
uint32_t midx_preferred_pack(struct bitmap_index *bitmap_git);
|
|
void reuse_partial_packfile_from_bitmap(struct bitmap_index *bitmap_git,
|
|
struct bitmapped_pack **packs_out,
|
|
size_t *packs_nr_out,
|
|
struct bitmap **reuse_out);
|
|
int rebuild_existing_bitmaps(struct bitmap_index *, struct packing_data *mapping,
|
|
kh_oid_map_t *reused_bitmaps, int show_progress);
|
|
void free_bitmap_index(struct bitmap_index *);
|
|
int bitmap_walk_contains(struct bitmap_index *,
|
|
struct bitmap *bitmap, const struct object_id *oid);
|
|
|
|
/*
|
|
* After a traversal has been performed by prepare_bitmap_walk(), this can be
|
|
* queried to see if a particular object was reachable from any of the
|
|
* objects flagged as UNINTERESTING.
|
|
*/
|
|
int bitmap_has_oid_in_uninteresting(struct bitmap_index *, const struct object_id *oid);
|
|
|
|
off_t get_disk_usage_from_bitmap(struct bitmap_index *, struct rev_info *);
|
|
|
|
void bitmap_writer_show_progress(int show);
|
|
void bitmap_writer_set_checksum(const unsigned char *sha1);
|
|
void bitmap_writer_build_type_index(struct packing_data *to_pack,
|
|
struct pack_idx_entry **index,
|
|
uint32_t index_nr);
|
|
uint32_t *create_bitmap_mapping(struct bitmap_index *bitmap_git,
|
|
struct packing_data *mapping);
|
|
int rebuild_bitmap(const uint32_t *reposition,
|
|
struct ewah_bitmap *source,
|
|
struct bitmap *dest);
|
|
struct ewah_bitmap *bitmap_for_commit(struct bitmap_index *bitmap_git,
|
|
struct commit *commit);
|
|
void bitmap_writer_select_commits(struct commit **indexed_commits,
|
|
unsigned int indexed_commits_nr, int max_bitmaps);
|
|
int bitmap_writer_build(struct packing_data *to_pack);
|
|
void bitmap_writer_finish(struct pack_idx_entry **index,
|
|
uint32_t index_nr,
|
|
const char *filename,
|
|
uint16_t options);
|
|
char *midx_bitmap_filename(struct multi_pack_index *midx);
|
|
char *pack_bitmap_filename(struct packed_git *p);
|
|
|
|
int bitmap_is_midx(struct bitmap_index *bitmap_git);
|
|
|
|
const struct string_list *bitmap_preferred_tips(struct repository *r);
|
|
int bitmap_is_preferred_refname(struct repository *r, const char *refname);
|
|
|
|
int verify_bitmap_files(struct repository *r);
|
|
|
|
#endif
|