#include "cache.h" #include "commit.h" #include "tag.h" #include "diff.h" #include "revision.h" #include "progress.h" #include "list-objects.h" #include "pack.h" #include "pack-bitmap.h" #include "pack-revindex.h" #include "pack-objects.h" #include "packfile.h" #include "repository.h" #include "object-store.h" #include "list-objects-filter-options.h" #include "midx.h" #include "config.h" /* * An entry on the bitmap index, representing the bitmap for a given * commit. */ struct stored_bitmap { struct object_id oid; struct ewah_bitmap *root; struct stored_bitmap *xor; int flags; }; /* * The active bitmap index for a repository. By design, repositories only have * a single bitmap index available (the index for the biggest packfile in * the repository), since bitmap indexes need full closure. * * If there is more than one bitmap index available (e.g. because of alternates), * the active bitmap index is the largest one. */ struct bitmap_index { /* * The pack or multi-pack index (MIDX) that this bitmap index belongs * to. * * Exactly one of these must be non-NULL; this specifies the object * order used to interpret this bitmap. */ struct packed_git *pack; struct multi_pack_index *midx; /* * Mark the first `reuse_objects` in the packfile as reused: * they will be sent as-is without using them for repacking * calculations */ uint32_t reuse_objects; /* mmapped buffer of the whole bitmap index */ unsigned char *map; size_t map_size; /* size of the mmaped buffer */ size_t map_pos; /* current position when loading the index */ /* * Type indexes. * * Each bitmap marks which objects in the packfile are of the given * type. This provides type information when yielding the objects from * the packfile during a walk, which allows for better delta bases. */ struct ewah_bitmap *commits; struct ewah_bitmap *trees; struct ewah_bitmap *blobs; struct ewah_bitmap *tags; /* Map from object ID -> `stored_bitmap` for all the bitmapped commits */ kh_oid_map_t *bitmaps; /* Number of bitmapped commits */ uint32_t entry_count; /* If not NULL, this is a name-hash cache pointing into map. */ uint32_t *hashes; /* The checksum of the packfile or MIDX; points into map. */ const unsigned char *checksum; /* * Extended index. * * When trying to perform bitmap operations with objects that are not * packed in `pack`, these objects are added to this "fake index" and * are assumed to appear at the end of the packfile for all operations */ struct eindex { struct object **objects; uint32_t *hashes; uint32_t count, alloc; kh_oid_pos_t *positions; } ext_index; /* Bitmap result of the last performed walk */ struct bitmap *result; /* "have" bitmap from the last performed walk */ struct bitmap *haves; /* Version of the bitmap index */ unsigned int version; }; static struct ewah_bitmap *lookup_stored_bitmap(struct stored_bitmap *st) { struct ewah_bitmap *parent; struct ewah_bitmap *composed; if (!st->xor) return st->root; composed = ewah_pool_new(); parent = lookup_stored_bitmap(st->xor); ewah_xor(st->root, parent, composed); ewah_pool_free(st->root); st->root = composed; st->xor = NULL; return composed; } /* * Read a bitmap from the current read position on the mmaped * index, and increase the read position accordingly */ static struct ewah_bitmap *read_bitmap_1(struct bitmap_index *index) { struct ewah_bitmap *b = ewah_pool_new(); ssize_t bitmap_size = ewah_read_mmap(b, index->map + index->map_pos, index->map_size - index->map_pos); if (bitmap_size < 0) { error("Failed to load bitmap index (corrupted?)"); ewah_pool_free(b); return NULL; } index->map_pos += bitmap_size; return b; } static uint32_t bitmap_num_objects(struct bitmap_index *index) { if (index->midx) return index->midx->num_objects; return index->pack->num_objects; } static int load_bitmap_header(struct bitmap_index *index) { struct bitmap_disk_header *header = (void *)index->map; size_t header_size = sizeof(*header) - GIT_MAX_RAWSZ + the_hash_algo->rawsz; if (index->map_size < header_size + the_hash_algo->rawsz) return error("Corrupted bitmap index (too small)"); if (memcmp(header->magic, BITMAP_IDX_SIGNATURE, sizeof(BITMAP_IDX_SIGNATURE)) != 0) return error("Corrupted bitmap index file (wrong header)"); index->version = ntohs(header->version); if (index->version != 1) return error("Unsupported version for bitmap index file (%d)", index->version); /* Parse known bitmap format options */ { uint32_t flags = ntohs(header->options); size_t cache_size = st_mult(bitmap_num_objects(index), sizeof(uint32_t)); unsigned char *index_end = index->map + index->map_size - the_hash_algo->rawsz; if ((flags & BITMAP_OPT_FULL_DAG) == 0) return error("Unsupported options for bitmap index file " "(Git requires BITMAP_OPT_FULL_DAG)"); if (flags & BITMAP_OPT_HASH_CACHE) { if (cache_size > index_end - index->map - header_size) return error("corrupted bitmap index file (too short to fit hash cache)"); index->hashes = (void *)(index_end - cache_size); index_end -= cache_size; } } index->entry_count = ntohl(header->entry_count); index->checksum = header->checksum; index->map_pos += header_size; return 0; } static struct stored_bitmap *store_bitmap(struct bitmap_index *index, struct ewah_bitmap *root, const struct object_id *oid, struct stored_bitmap *xor_with, int flags) { struct stored_bitmap *stored; khiter_t hash_pos; int ret; stored = xmalloc(sizeof(struct stored_bitmap)); stored->root = root; stored->xor = xor_with; stored->flags = flags; oidcpy(&stored->oid, oid); hash_pos = kh_put_oid_map(index->bitmaps, stored->oid, &ret); /* a 0 return code means the insertion succeeded with no changes, * because the SHA1 already existed on the map. this is bad, there * shouldn't be duplicated commits in the index */ if (ret == 0) { error("Duplicate entry in bitmap index: %s", oid_to_hex(oid)); return NULL; } kh_value(index->bitmaps, hash_pos) = stored; return stored; } static inline uint32_t read_be32(const unsigned char *buffer, size_t *pos) { uint32_t result = get_be32(buffer + *pos); (*pos) += sizeof(result); return result; } static inline uint8_t read_u8(const unsigned char *buffer, size_t *pos) { return buffer[(*pos)++]; } #define MAX_XOR_OFFSET 160 static int nth_bitmap_object_oid(struct bitmap_index *index, struct object_id *oid, uint32_t n) { if (index->midx) return nth_midxed_object_oid(oid, index->midx, n) ? 0 : -1; return nth_packed_object_id(oid, index->pack, n); } static int load_bitmap_entries_v1(struct bitmap_index *index) { uint32_t i; struct stored_bitmap *recent_bitmaps[MAX_XOR_OFFSET] = { NULL }; for (i = 0; i < index->entry_count; ++i) { int xor_offset, flags; struct ewah_bitmap *bitmap = NULL; struct stored_bitmap *xor_bitmap = NULL; uint32_t commit_idx_pos; struct object_id oid; if (index->map_size - index->map_pos < 6) return error("corrupt ewah bitmap: truncated header for entry %d", i); commit_idx_pos = read_be32(index->map, &index->map_pos); xor_offset = read_u8(index->map, &index->map_pos); flags = read_u8(index->map, &index->map_pos); if (nth_bitmap_object_oid(index, &oid, commit_idx_pos) < 0) return error("corrupt ewah bitmap: commit index %u out of range", (unsigned)commit_idx_pos); bitmap = read_bitmap_1(index); if (!bitmap) return -1; if (xor_offset > MAX_XOR_OFFSET || xor_offset > i) return error("Corrupted bitmap pack index"); if (xor_offset > 0) { xor_bitmap = recent_bitmaps[(i - xor_offset) % MAX_XOR_OFFSET]; if (!xor_bitmap) return error("Invalid XOR offset in bitmap pack index"); } recent_bitmaps[i % MAX_XOR_OFFSET] = store_bitmap( index, bitmap, &oid, xor_bitmap, flags); } return 0; } char *midx_bitmap_filename(struct multi_pack_index *midx) { struct strbuf buf = STRBUF_INIT; get_midx_filename(&buf, midx->object_dir); strbuf_addf(&buf, "-%s.bitmap", hash_to_hex(get_midx_checksum(midx))); return strbuf_detach(&buf, NULL); } char *pack_bitmap_filename(struct packed_git *p) { size_t len; if (!strip_suffix(p->pack_name, ".pack", &len)) BUG("pack_name does not end in .pack"); return xstrfmt("%.*s.bitmap", (int)len, p->pack_name); } static int open_midx_bitmap_1(struct bitmap_index *bitmap_git, struct multi_pack_index *midx) { struct stat st; char *idx_name = midx_bitmap_filename(midx); int fd = git_open(idx_name); uint32_t i; struct packed_git *preferred; free(idx_name); if (fd < 0) return -1; if (fstat(fd, &st)) { close(fd); return -1; } if (bitmap_git->pack || bitmap_git->midx) { struct strbuf buf = STRBUF_INIT; get_midx_filename(&buf, midx->object_dir); /* ignore extra bitmap file; we can only handle one */ warning("ignoring extra bitmap file: %s", buf.buf); close(fd); strbuf_release(&buf); return -1; } bitmap_git->midx = midx; bitmap_git->map_size = xsize_t(st.st_size); bitmap_git->map_pos = 0; bitmap_git->map = xmmap(NULL, bitmap_git->map_size, PROT_READ, MAP_PRIVATE, fd, 0); close(fd); if (load_bitmap_header(bitmap_git) < 0) goto cleanup; if (!hasheq(get_midx_checksum(bitmap_git->midx), bitmap_git->checksum)) goto cleanup; if (load_midx_revindex(bitmap_git->midx) < 0) { warning(_("multi-pack bitmap is missing required reverse index")); goto cleanup; } for (i = 0; i < bitmap_git->midx->num_packs; i++) { if (prepare_midx_pack(the_repository, bitmap_git->midx, i)) die(_("could not open pack %s"), bitmap_git->midx->pack_names[i]); } preferred = bitmap_git->midx->packs[midx_preferred_pack(bitmap_git)]; if (!is_pack_valid(preferred)) { warning(_("preferred pack (%s) is invalid"), preferred->pack_name); goto cleanup; } return 0; cleanup: munmap(bitmap_git->map, bitmap_git->map_size); bitmap_git->map_size = 0; bitmap_git->map_pos = 0; bitmap_git->map = NULL; bitmap_git->midx = NULL; return -1; } static int open_pack_bitmap_1(struct bitmap_index *bitmap_git, struct packed_git *packfile) { int fd; struct stat st; char *idx_name; if (open_pack_index(packfile)) return -1; idx_name = pack_bitmap_filename(packfile); fd = git_open(idx_name); free(idx_name); if (fd < 0) return -1; if (fstat(fd, &st)) { close(fd); return -1; } if (bitmap_git->pack || bitmap_git->midx) { /* ignore extra bitmap file; we can only handle one */ warning("ignoring extra bitmap file: %s", packfile->pack_name); close(fd); return -1; } if (!is_pack_valid(packfile)) { close(fd); return -1; } bitmap_git->pack = packfile; bitmap_git->map_size = xsize_t(st.st_size); bitmap_git->map = xmmap(NULL, bitmap_git->map_size, PROT_READ, MAP_PRIVATE, fd, 0); bitmap_git->map_pos = 0; close(fd); if (load_bitmap_header(bitmap_git) < 0) { munmap(bitmap_git->map, bitmap_git->map_size); bitmap_git->map = NULL; bitmap_git->map_size = 0; bitmap_git->map_pos = 0; bitmap_git->pack = NULL; return -1; } return 0; } static int load_reverse_index(struct bitmap_index *bitmap_git) { if (bitmap_is_midx(bitmap_git)) { uint32_t i; int ret; /* * The multi-pack-index's .rev file is already loaded via * open_pack_bitmap_1(). * * But we still need to open the individual pack .rev files, * since we will need to make use of them in pack-objects. */ for (i = 0; i < bitmap_git->midx->num_packs; i++) { ret = load_pack_revindex(bitmap_git->midx->packs[i]); if (ret) return ret; } return 0; } return load_pack_revindex(bitmap_git->pack); } static int load_bitmap(struct bitmap_index *bitmap_git) { assert(bitmap_git->map); bitmap_git->bitmaps = kh_init_oid_map(); bitmap_git->ext_index.positions = kh_init_oid_pos(); if (load_reverse_index(bitmap_git)) goto failed; if (!(bitmap_git->commits = read_bitmap_1(bitmap_git)) || !(bitmap_git->trees = read_bitmap_1(bitmap_git)) || !(bitmap_git->blobs = read_bitmap_1(bitmap_git)) || !(bitmap_git->tags = read_bitmap_1(bitmap_git))) goto failed; if (load_bitmap_entries_v1(bitmap_git) < 0) goto failed; return 0; failed: munmap(bitmap_git->map, bitmap_git->map_size); bitmap_git->map = NULL; bitmap_git->map_size = 0; kh_destroy_oid_map(bitmap_git->bitmaps); bitmap_git->bitmaps = NULL; kh_destroy_oid_pos(bitmap_git->ext_index.positions); bitmap_git->ext_index.positions = NULL; return -1; } static int open_pack_bitmap(struct repository *r, struct bitmap_index *bitmap_git) { struct packed_git *p; int ret = -1; assert(!bitmap_git->map); for (p = get_all_packs(r); p; p = p->next) { if (open_pack_bitmap_1(bitmap_git, p) == 0) ret = 0; } return ret; } static int open_midx_bitmap(struct repository *r, struct bitmap_index *bitmap_git) { struct multi_pack_index *midx; assert(!bitmap_git->map); for (midx = get_multi_pack_index(r); midx; midx = midx->next) { if (!open_midx_bitmap_1(bitmap_git, midx)) return 0; } return -1; } static int open_bitmap(struct repository *r, struct bitmap_index *bitmap_git) { assert(!bitmap_git->map); if (!open_midx_bitmap(r, bitmap_git)) return 0; return open_pack_bitmap(r, bitmap_git); } struct bitmap_index *prepare_bitmap_git(struct repository *r) { struct bitmap_index *bitmap_git = xcalloc(1, sizeof(*bitmap_git)); if (!open_bitmap(r, bitmap_git) && !load_bitmap(bitmap_git)) return bitmap_git; free_bitmap_index(bitmap_git); return NULL; } struct bitmap_index *prepare_midx_bitmap_git(struct multi_pack_index *midx) { struct bitmap_index *bitmap_git = xcalloc(1, sizeof(*bitmap_git)); if (!open_midx_bitmap_1(bitmap_git, midx) && !load_bitmap(bitmap_git)) return bitmap_git; free_bitmap_index(bitmap_git); return NULL; } struct include_data { struct bitmap_index *bitmap_git; struct bitmap *base; struct bitmap *seen; }; struct ewah_bitmap *bitmap_for_commit(struct bitmap_index *bitmap_git, struct commit *commit) { khiter_t hash_pos = kh_get_oid_map(bitmap_git->bitmaps, commit->object.oid); if (hash_pos >= kh_end(bitmap_git->bitmaps)) return NULL; return lookup_stored_bitmap(kh_value(bitmap_git->bitmaps, hash_pos)); } static inline int bitmap_position_extended(struct bitmap_index *bitmap_git, const struct object_id *oid) { kh_oid_pos_t *positions = bitmap_git->ext_index.positions; khiter_t pos = kh_get_oid_pos(positions, *oid); if (pos < kh_end(positions)) { int bitmap_pos = kh_value(positions, pos); return bitmap_pos + bitmap_num_objects(bitmap_git); } return -1; } static inline int bitmap_position_packfile(struct bitmap_index *bitmap_git, const struct object_id *oid) { uint32_t pos; off_t offset = find_pack_entry_one(oid->hash, bitmap_git->pack); if (!offset) return -1; if (offset_to_pack_pos(bitmap_git->pack, offset, &pos) < 0) return -1; return pos; } static int bitmap_position_midx(struct bitmap_index *bitmap_git, const struct object_id *oid) { uint32_t want, got; if (!bsearch_midx(oid, bitmap_git->midx, &want)) return -1; if (midx_to_pack_pos(bitmap_git->midx, want, &got) < 0) return -1; return got; } static int bitmap_position(struct bitmap_index *bitmap_git, const struct object_id *oid) { int pos; if (bitmap_is_midx(bitmap_git)) pos = bitmap_position_midx(bitmap_git, oid); else pos = bitmap_position_packfile(bitmap_git, oid); return (pos >= 0) ? pos : bitmap_position_extended(bitmap_git, oid); } static int ext_index_add_object(struct bitmap_index *bitmap_git, struct object *object, const char *name) { struct eindex *eindex = &bitmap_git->ext_index; khiter_t hash_pos; int hash_ret; int bitmap_pos; hash_pos = kh_put_oid_pos(eindex->positions, object->oid, &hash_ret); if (hash_ret > 0) { if (eindex->count >= eindex->alloc) { eindex->alloc = (eindex->alloc + 16) * 3 / 2; REALLOC_ARRAY(eindex->objects, eindex->alloc); REALLOC_ARRAY(eindex->hashes, eindex->alloc); } bitmap_pos = eindex->count; eindex->objects[eindex->count] = object; eindex->hashes[eindex->count] = pack_name_hash(name); kh_value(eindex->positions, hash_pos) = bitmap_pos; eindex->count++; } else { bitmap_pos = kh_value(eindex->positions, hash_pos); } return bitmap_pos + bitmap_num_objects(bitmap_git); } struct bitmap_show_data { struct bitmap_index *bitmap_git; struct bitmap *base; }; static void show_object(struct object *object, const char *name, void *data_) { struct bitmap_show_data *data = data_; int bitmap_pos; bitmap_pos = bitmap_position(data->bitmap_git, &object->oid); if (bitmap_pos < 0) bitmap_pos = ext_index_add_object(data->bitmap_git, object, name); bitmap_set(data->base, bitmap_pos); } static void show_commit(struct commit *commit, void *data) { } static int add_to_include_set(struct bitmap_index *bitmap_git, struct include_data *data, struct commit *commit, int bitmap_pos) { struct ewah_bitmap *partial; if (data->seen && bitmap_get(data->seen, bitmap_pos)) return 0; if (bitmap_get(data->base, bitmap_pos)) return 0; partial = bitmap_for_commit(bitmap_git, commit); if (partial) { bitmap_or_ewah(data->base, partial); return 0; } bitmap_set(data->base, bitmap_pos); return 1; } static int should_include(struct commit *commit, void *_data) { struct include_data *data = _data; int bitmap_pos; bitmap_pos = bitmap_position(data->bitmap_git, &commit->object.oid); if (bitmap_pos < 0) bitmap_pos = ext_index_add_object(data->bitmap_git, (struct object *)commit, NULL); if (!add_to_include_set(data->bitmap_git, data, commit, bitmap_pos)) { struct commit_list *parent = commit->parents; while (parent) { parent->item->object.flags |= SEEN; parent = parent->next; } return 0; } return 1; } static int should_include_obj(struct object *obj, void *_data) { struct include_data *data = _data; int bitmap_pos; bitmap_pos = bitmap_position(data->bitmap_git, &obj->oid); if (bitmap_pos < 0) return 1; if ((data->seen && bitmap_get(data->seen, bitmap_pos)) || bitmap_get(data->base, bitmap_pos)) { obj->flags |= SEEN; return 0; } return 1; } static int add_commit_to_bitmap(struct bitmap_index *bitmap_git, struct bitmap **base, struct commit *commit) { struct ewah_bitmap *or_with = bitmap_for_commit(bitmap_git, commit); if (!or_with) return 0; if (!*base) *base = ewah_to_bitmap(or_with); else bitmap_or_ewah(*base, or_with); return 1; } static struct bitmap *find_objects(struct bitmap_index *bitmap_git, struct rev_info *revs, struct object_list *roots, struct bitmap *seen) { struct bitmap *base = NULL; int needs_walk = 0; struct object_list *not_mapped = NULL; /* * Go through all the roots for the walk. The ones that have bitmaps * on the bitmap index will be `or`ed together to form an initial * global reachability analysis. * * The ones without bitmaps in the index will be stored in the * `not_mapped_list` for further processing. */ while (roots) { struct object *object = roots->item; roots = roots->next; if (object->type == OBJ_COMMIT && add_commit_to_bitmap(bitmap_git, &base, (struct commit *)object)) { object->flags |= SEEN; continue; } object_list_insert(object, ¬_mapped); } /* * Best case scenario: We found bitmaps for all the roots, * so the resulting `or` bitmap has the full reachability analysis */ if (!not_mapped) return base; roots = not_mapped; /* * Let's iterate through all the roots that don't have bitmaps to * check if we can determine them to be reachable from the existing * global bitmap. * * If we cannot find them in the existing global bitmap, we'll need * to push them to an actual walk and run it until we can confirm * they are reachable */ while (roots) { struct object *object = roots->item; int pos; roots = roots->next; pos = bitmap_position(bitmap_git, &object->oid); if (pos < 0 || base == NULL || !bitmap_get(base, pos)) { object->flags &= ~UNINTERESTING; add_pending_object(revs, object, ""); needs_walk = 1; } else { object->flags |= SEEN; } } if (needs_walk) { struct include_data incdata; struct bitmap_show_data show_data; if (!base) base = bitmap_new(); incdata.bitmap_git = bitmap_git; incdata.base = base; incdata.seen = seen; revs->include_check = should_include; revs->include_check_obj = should_include_obj; revs->include_check_data = &incdata; if (prepare_revision_walk(revs)) die("revision walk setup failed"); show_data.bitmap_git = bitmap_git; show_data.base = base; traverse_commit_list(revs, show_commit, show_object, &show_data); revs->include_check = NULL; revs->include_check_obj = NULL; revs->include_check_data = NULL; } return base; } static void show_extended_objects(struct bitmap_index *bitmap_git, struct rev_info *revs, show_reachable_fn show_reach) { struct bitmap *objects = bitmap_git->result; struct eindex *eindex = &bitmap_git->ext_index; uint32_t i; for (i = 0; i < eindex->count; ++i) { struct object *obj; if (!bitmap_get(objects, bitmap_num_objects(bitmap_git) + i)) continue; obj = eindex->objects[i]; if ((obj->type == OBJ_BLOB && !revs->blob_objects) || (obj->type == OBJ_TREE && !revs->tree_objects) || (obj->type == OBJ_TAG && !revs->tag_objects)) continue; show_reach(&obj->oid, obj->type, 0, eindex->hashes[i], NULL, 0); } } static void init_type_iterator(struct ewah_iterator *it, struct bitmap_index *bitmap_git, enum object_type type) { switch (type) { case OBJ_COMMIT: ewah_iterator_init(it, bitmap_git->commits); break; case OBJ_TREE: ewah_iterator_init(it, bitmap_git->trees); break; case OBJ_BLOB: ewah_iterator_init(it, bitmap_git->blobs); break; case OBJ_TAG: ewah_iterator_init(it, bitmap_git->tags); break; default: BUG("object type %d not stored by bitmap type index", type); break; } } static void show_objects_for_type( struct bitmap_index *bitmap_git, enum object_type object_type, show_reachable_fn show_reach) { size_t i = 0; uint32_t offset; struct ewah_iterator it; eword_t filter; struct bitmap *objects = bitmap_git->result; init_type_iterator(&it, bitmap_git, object_type); for (i = 0; i < objects->word_alloc && ewah_iterator_next(&filter, &it); i++) { eword_t word = objects->words[i] & filter; size_t pos = (i * BITS_IN_EWORD); if (!word) continue; for (offset = 0; offset < BITS_IN_EWORD; ++offset) { struct packed_git *pack; struct object_id oid; uint32_t hash = 0, index_pos; off_t ofs; if ((word >> offset) == 0) break; offset += ewah_bit_ctz64(word >> offset); if (bitmap_is_midx(bitmap_git)) { struct multi_pack_index *m = bitmap_git->midx; uint32_t pack_id; index_pos = pack_pos_to_midx(m, pos + offset); ofs = nth_midxed_offset(m, index_pos); nth_midxed_object_oid(&oid, m, index_pos); pack_id = nth_midxed_pack_int_id(m, index_pos); pack = bitmap_git->midx->packs[pack_id]; } else { index_pos = pack_pos_to_index(bitmap_git->pack, pos + offset); ofs = pack_pos_to_offset(bitmap_git->pack, pos + offset); nth_bitmap_object_oid(bitmap_git, &oid, index_pos); pack = bitmap_git->pack; } if (bitmap_git->hashes) hash = get_be32(bitmap_git->hashes + index_pos); show_reach(&oid, object_type, 0, hash, pack, ofs); } } } static int in_bitmapped_pack(struct bitmap_index *bitmap_git, struct object_list *roots) { while (roots) { struct object *object = roots->item; roots = roots->next; if (bitmap_is_midx(bitmap_git)) { if (bsearch_midx(&object->oid, bitmap_git->midx, NULL)) return 1; } else { if (find_pack_entry_one(object->oid.hash, bitmap_git->pack) > 0) return 1; } } return 0; } static struct bitmap *find_tip_objects(struct bitmap_index *bitmap_git, struct object_list *tip_objects, enum object_type type) { struct bitmap *result = bitmap_new(); struct object_list *p; for (p = tip_objects; p; p = p->next) { int pos; if (p->item->type != type) continue; pos = bitmap_position(bitmap_git, &p->item->oid); if (pos < 0) continue; bitmap_set(result, pos); } return result; } static void filter_bitmap_exclude_type(struct bitmap_index *bitmap_git, struct object_list *tip_objects, struct bitmap *to_filter, enum object_type type) { struct eindex *eindex = &bitmap_git->ext_index; struct bitmap *tips; struct ewah_iterator it; eword_t mask; uint32_t i; /* * The non-bitmap version of this filter never removes * objects which the other side specifically asked for, * so we must match that behavior. */ tips = find_tip_objects(bitmap_git, tip_objects, type); /* * We can use the type-level bitmap for 'type' to work in whole * words for the objects that are actually in the bitmapped * packfile. */ for (i = 0, init_type_iterator(&it, bitmap_git, type); i < to_filter->word_alloc && ewah_iterator_next(&mask, &it); i++) { if (i < tips->word_alloc) mask &= ~tips->words[i]; to_filter->words[i] &= ~mask; } /* * Clear any objects that weren't in the packfile (and so would * not have been caught by the loop above. We'll have to check * them individually. */ for (i = 0; i < eindex->count; i++) { uint32_t pos = i + bitmap_num_objects(bitmap_git); if (eindex->objects[i]->type == type && bitmap_get(to_filter, pos) && !bitmap_get(tips, pos)) bitmap_unset(to_filter, pos); } bitmap_free(tips); } static void filter_bitmap_blob_none(struct bitmap_index *bitmap_git, struct object_list *tip_objects, struct bitmap *to_filter) { filter_bitmap_exclude_type(bitmap_git, tip_objects, to_filter, OBJ_BLOB); } static unsigned long get_size_by_pos(struct bitmap_index *bitmap_git, uint32_t pos) { unsigned long size; struct object_info oi = OBJECT_INFO_INIT; oi.sizep = &size; if (pos < bitmap_num_objects(bitmap_git)) { struct packed_git *pack; off_t ofs; if (bitmap_is_midx(bitmap_git)) { uint32_t midx_pos = pack_pos_to_midx(bitmap_git->midx, pos); uint32_t pack_id = nth_midxed_pack_int_id(bitmap_git->midx, midx_pos); pack = bitmap_git->midx->packs[pack_id]; ofs = nth_midxed_offset(bitmap_git->midx, midx_pos); } else { pack = bitmap_git->pack; ofs = pack_pos_to_offset(pack, pos); } if (packed_object_info(the_repository, pack, ofs, &oi) < 0) { struct object_id oid; nth_bitmap_object_oid(bitmap_git, &oid, pack_pos_to_index(pack, pos)); die(_("unable to get size of %s"), oid_to_hex(&oid)); } } else { struct eindex *eindex = &bitmap_git->ext_index; struct object *obj = eindex->objects[pos - bitmap_num_objects(bitmap_git)]; if (oid_object_info_extended(the_repository, &obj->oid, &oi, 0) < 0) die(_("unable to get size of %s"), oid_to_hex(&obj->oid)); } return size; } static void filter_bitmap_blob_limit(struct bitmap_index *bitmap_git, struct object_list *tip_objects, struct bitmap *to_filter, unsigned long limit) { struct eindex *eindex = &bitmap_git->ext_index; struct bitmap *tips; struct ewah_iterator it; eword_t mask; uint32_t i; tips = find_tip_objects(bitmap_git, tip_objects, OBJ_BLOB); for (i = 0, init_type_iterator(&it, bitmap_git, OBJ_BLOB); i < to_filter->word_alloc && ewah_iterator_next(&mask, &it); i++) { eword_t word = to_filter->words[i] & mask; unsigned offset; for (offset = 0; offset < BITS_IN_EWORD; offset++) { uint32_t pos; if ((word >> offset) == 0) break; offset += ewah_bit_ctz64(word >> offset); pos = i * BITS_IN_EWORD + offset; if (!bitmap_get(tips, pos) && get_size_by_pos(bitmap_git, pos) >= limit) bitmap_unset(to_filter, pos); } } for (i = 0; i < eindex->count; i++) { uint32_t pos = i + bitmap_num_objects(bitmap_git); if (eindex->objects[i]->type == OBJ_BLOB && bitmap_get(to_filter, pos) && !bitmap_get(tips, pos) && get_size_by_pos(bitmap_git, pos) >= limit) bitmap_unset(to_filter, pos); } bitmap_free(tips); } static void filter_bitmap_tree_depth(struct bitmap_index *bitmap_git, struct object_list *tip_objects, struct bitmap *to_filter, unsigned long limit) { if (limit) BUG("filter_bitmap_tree_depth given non-zero limit"); filter_bitmap_exclude_type(bitmap_git, tip_objects, to_filter, OBJ_TREE); filter_bitmap_exclude_type(bitmap_git, tip_objects, to_filter, OBJ_BLOB); } static void filter_bitmap_object_type(struct bitmap_index *bitmap_git, struct object_list *tip_objects, struct bitmap *to_filter, enum object_type object_type) { if (object_type < OBJ_COMMIT || object_type > OBJ_TAG) BUG("filter_bitmap_object_type given invalid object"); if (object_type != OBJ_TAG) filter_bitmap_exclude_type(bitmap_git, tip_objects, to_filter, OBJ_TAG); if (object_type != OBJ_COMMIT) filter_bitmap_exclude_type(bitmap_git, tip_objects, to_filter, OBJ_COMMIT); if (object_type != OBJ_TREE) filter_bitmap_exclude_type(bitmap_git, tip_objects, to_filter, OBJ_TREE); if (object_type != OBJ_BLOB) filter_bitmap_exclude_type(bitmap_git, tip_objects, to_filter, OBJ_BLOB); } static int filter_bitmap(struct bitmap_index *bitmap_git, struct object_list *tip_objects, struct bitmap *to_filter, struct list_objects_filter_options *filter) { if (!filter || filter->choice == LOFC_DISABLED) return 0; if (filter->choice == LOFC_BLOB_NONE) { if (bitmap_git) filter_bitmap_blob_none(bitmap_git, tip_objects, to_filter); return 0; } if (filter->choice == LOFC_BLOB_LIMIT) { if (bitmap_git) filter_bitmap_blob_limit(bitmap_git, tip_objects, to_filter, filter->blob_limit_value); return 0; } if (filter->choice == LOFC_TREE_DEPTH && filter->tree_exclude_depth == 0) { if (bitmap_git) filter_bitmap_tree_depth(bitmap_git, tip_objects, to_filter, filter->tree_exclude_depth); return 0; } if (filter->choice == LOFC_OBJECT_TYPE) { if (bitmap_git) filter_bitmap_object_type(bitmap_git, tip_objects, to_filter, filter->object_type); return 0; } if (filter->choice == LOFC_COMBINE) { int i; for (i = 0; i < filter->sub_nr; i++) { if (filter_bitmap(bitmap_git, tip_objects, to_filter, &filter->sub[i]) < 0) return -1; } return 0; } /* filter choice not handled */ return -1; } static int can_filter_bitmap(struct list_objects_filter_options *filter) { return !filter_bitmap(NULL, NULL, NULL, filter); } struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs, int filter_provided_objects) { unsigned int i; struct object_list *wants = NULL; struct object_list *haves = NULL; struct bitmap *wants_bitmap = NULL; struct bitmap *haves_bitmap = NULL; struct bitmap_index *bitmap_git; /* * We can't do pathspec limiting with bitmaps, because we don't know * which commits are associated with which object changes (let alone * even which objects are associated with which paths). */ if (revs->prune) return NULL; if (!can_filter_bitmap(&revs->filter)) return NULL; /* try to open a bitmapped pack, but don't parse it yet * because we may not need to use it */ CALLOC_ARRAY(bitmap_git, 1); if (open_bitmap(revs->repo, bitmap_git) < 0) goto cleanup; for (i = 0; i < revs->pending.nr; ++i) { struct object *object = revs->pending.objects[i].item; if (object->type == OBJ_NONE) parse_object_or_die(&object->oid, NULL); while (object->type == OBJ_TAG) { struct tag *tag = (struct tag *) object; if (object->flags & UNINTERESTING) object_list_insert(object, &haves); else object_list_insert(object, &wants); object = parse_object_or_die(get_tagged_oid(tag), NULL); object->flags |= (tag->object.flags & UNINTERESTING); } if (object->flags & UNINTERESTING) object_list_insert(object, &haves); else object_list_insert(object, &wants); } /* * if we have a HAVES list, but none of those haves is contained * in the packfile that has a bitmap, we don't have anything to * optimize here */ if (haves && !in_bitmapped_pack(bitmap_git, haves)) goto cleanup; /* if we don't want anything, we're done here */ if (!wants) goto cleanup; /* * now we're going to use bitmaps, so load the actual bitmap entries * from disk. this is the point of no return; after this the rev_list * becomes invalidated and we must perform the revwalk through bitmaps */ if (load_bitmap(bitmap_git) < 0) goto cleanup; object_array_clear(&revs->pending); if (haves) { revs->ignore_missing_links = 1; haves_bitmap = find_objects(bitmap_git, revs, haves, NULL); reset_revision_walk(); revs->ignore_missing_links = 0; if (!haves_bitmap) BUG("failed to perform bitmap walk"); } wants_bitmap = find_objects(bitmap_git, revs, wants, haves_bitmap); if (!wants_bitmap) BUG("failed to perform bitmap walk"); if (haves_bitmap) bitmap_and_not(wants_bitmap, haves_bitmap); filter_bitmap(bitmap_git, (revs->filter.choice && filter_provided_objects) ? NULL : wants, wants_bitmap, &revs->filter); bitmap_git->result = wants_bitmap; bitmap_git->haves = haves_bitmap; object_list_free(&wants); object_list_free(&haves); return bitmap_git; cleanup: free_bitmap_index(bitmap_git); object_list_free(&wants); object_list_free(&haves); return NULL; } /* * -1 means "stop trying further objects"; 0 means we may or may not have * reused, but you can keep feeding bits. */ static int try_partial_reuse(struct packed_git *pack, size_t pos, struct bitmap *reuse, struct pack_window **w_curs) { off_t offset, delta_obj_offset; enum object_type type; unsigned long size; /* * try_partial_reuse() is called either on (a) objects in the * bitmapped pack (in the case of a single-pack bitmap) or (b) * objects in the preferred pack of a multi-pack bitmap. * Importantly, the latter can pretend as if only a single pack * exists because: * * - The first pack->num_objects bits of a MIDX bitmap are * reserved for the preferred pack, and * * - Ties due to duplicate objects are always resolved in * favor of the preferred pack. * * Therefore we do not need to ever ask the MIDX for its copy of * an object by OID, since it will always select it from the * preferred pack. Likewise, the selected copy of the base * object for any deltas will reside in the same pack. * * This means that we can reuse pos when looking up the bit in * the reuse bitmap, too, since bits corresponding to the * preferred pack precede all bits from other packs. */ if (pos >= pack->num_objects) return -1; /* not actually in the pack or MIDX preferred pack */ offset = delta_obj_offset = pack_pos_to_offset(pack, pos); type = unpack_object_header(pack, w_curs, &offset, &size); if (type < 0) return -1; /* broken packfile, punt */ if (type == OBJ_REF_DELTA || type == OBJ_OFS_DELTA) { off_t base_offset; uint32_t base_pos; /* * Find the position of the base object so we can look it up * in our bitmaps. If we can't come up with an offset, or if * that offset is not in the revidx, the pack is corrupt. * There's nothing we can do, so just punt on this object, * and the normal slow path will complain about it in * more detail. */ base_offset = get_delta_base(pack, w_curs, &offset, type, delta_obj_offset); if (!base_offset) return 0; if (offset_to_pack_pos(pack, base_offset, &base_pos) < 0) return 0; /* * We assume delta dependencies always point backwards. This * lets us do a single pass, and is basically always true * due to the way OFS_DELTAs work. You would not typically * find REF_DELTA in a bitmapped pack, since we only bitmap * packs we write fresh, and OFS_DELTA is the default). But * let's double check to make sure the pack wasn't written with * odd parameters. */ if (base_pos >= pos) return 0; /* * And finally, if we're not sending the base as part of our * reuse chunk, then don't send this object either. The base * would come after us, along with other objects not * necessarily in the pack, which means we'd need to convert * to REF_DELTA on the fly. Better to just let the normal * object_entry code path handle it. */ if (!bitmap_get(reuse, base_pos)) return 0; } /* * If we got here, then the object is OK to reuse. Mark it. */ bitmap_set(reuse, pos); return 0; } uint32_t midx_preferred_pack(struct bitmap_index *bitmap_git) { struct multi_pack_index *m = bitmap_git->midx; if (!m) BUG("midx_preferred_pack: requires non-empty MIDX"); return nth_midxed_pack_int_id(m, pack_pos_to_midx(bitmap_git->midx, 0)); } int reuse_partial_packfile_from_bitmap(struct bitmap_index *bitmap_git, struct packed_git **packfile_out, uint32_t *entries, struct bitmap **reuse_out) { struct packed_git *pack; struct bitmap *result = bitmap_git->result; struct bitmap *reuse; struct pack_window *w_curs = NULL; size_t i = 0; uint32_t offset; uint32_t objects_nr; assert(result); load_reverse_index(bitmap_git); if (bitmap_is_midx(bitmap_git)) pack = bitmap_git->midx->packs[midx_preferred_pack(bitmap_git)]; else pack = bitmap_git->pack; objects_nr = pack->num_objects; while (i < result->word_alloc && result->words[i] == (eword_t)~0) i++; /* * Don't mark objects not in the packfile or preferred pack. This bitmap * marks objects eligible for reuse, but the pack-reuse code only * understands how to reuse a single pack. Since the preferred pack is * guaranteed to have all bases for its deltas (in a multi-pack bitmap), * we use it instead of another pack. In single-pack bitmaps, the choice * is made for us. */ if (i > objects_nr / BITS_IN_EWORD) i = objects_nr / BITS_IN_EWORD; reuse = bitmap_word_alloc(i); memset(reuse->words, 0xFF, i * sizeof(eword_t)); for (; i < result->word_alloc; ++i) { eword_t word = result->words[i]; size_t pos = (i * BITS_IN_EWORD); for (offset = 0; offset < BITS_IN_EWORD; ++offset) { if ((word >> offset) == 0) break; offset += ewah_bit_ctz64(word >> offset); if (try_partial_reuse(pack, pos + offset, reuse, &w_curs) < 0) { /* * try_partial_reuse indicated we couldn't reuse * any bits, so there is no point in trying more * bits in the current word, or any other words * in result. * * Jump out of both loops to avoid future * unnecessary calls to try_partial_reuse. */ goto done; } } } done: unuse_pack(&w_curs); *entries = bitmap_popcount(reuse); if (!*entries) { bitmap_free(reuse); return -1; } /* * Drop any reused objects from the result, since they will not * need to be handled separately. */ bitmap_and_not(result, reuse); *packfile_out = pack; *reuse_out = reuse; return 0; } int bitmap_walk_contains(struct bitmap_index *bitmap_git, struct bitmap *bitmap, const struct object_id *oid) { int idx; if (!bitmap) return 0; idx = bitmap_position(bitmap_git, oid); return idx >= 0 && bitmap_get(bitmap, idx); } void traverse_bitmap_commit_list(struct bitmap_index *bitmap_git, struct rev_info *revs, show_reachable_fn show_reachable) { assert(bitmap_git->result); show_objects_for_type(bitmap_git, OBJ_COMMIT, show_reachable); if (revs->tree_objects) show_objects_for_type(bitmap_git, OBJ_TREE, show_reachable); if (revs->blob_objects) show_objects_for_type(bitmap_git, OBJ_BLOB, show_reachable); if (revs->tag_objects) show_objects_for_type(bitmap_git, OBJ_TAG, show_reachable); show_extended_objects(bitmap_git, revs, show_reachable); } static uint32_t count_object_type(struct bitmap_index *bitmap_git, enum object_type type) { struct bitmap *objects = bitmap_git->result; struct eindex *eindex = &bitmap_git->ext_index; uint32_t i = 0, count = 0; struct ewah_iterator it; eword_t filter; init_type_iterator(&it, bitmap_git, type); while (i < objects->word_alloc && ewah_iterator_next(&filter, &it)) { eword_t word = objects->words[i++] & filter; count += ewah_bit_popcount64(word); } for (i = 0; i < eindex->count; ++i) { if (eindex->objects[i]->type == type && bitmap_get(objects, bitmap_num_objects(bitmap_git) + i)) count++; } return count; } void count_bitmap_commit_list(struct bitmap_index *bitmap_git, uint32_t *commits, uint32_t *trees, uint32_t *blobs, uint32_t *tags) { assert(bitmap_git->result); if (commits) *commits = count_object_type(bitmap_git, OBJ_COMMIT); if (trees) *trees = count_object_type(bitmap_git, OBJ_TREE); if (blobs) *blobs = count_object_type(bitmap_git, OBJ_BLOB); if (tags) *tags = count_object_type(bitmap_git, OBJ_TAG); } struct bitmap_test_data { struct bitmap_index *bitmap_git; struct bitmap *base; struct bitmap *commits; struct bitmap *trees; struct bitmap *blobs; struct bitmap *tags; struct progress *prg; size_t seen; }; static void test_bitmap_type(struct bitmap_test_data *tdata, struct object *obj, int pos) { enum object_type bitmap_type = OBJ_NONE; int bitmaps_nr = 0; if (bitmap_get(tdata->commits, pos)) { bitmap_type = OBJ_COMMIT; bitmaps_nr++; } if (bitmap_get(tdata->trees, pos)) { bitmap_type = OBJ_TREE; bitmaps_nr++; } if (bitmap_get(tdata->blobs, pos)) { bitmap_type = OBJ_BLOB; bitmaps_nr++; } if (bitmap_get(tdata->tags, pos)) { bitmap_type = OBJ_TAG; bitmaps_nr++; } if (bitmap_type == OBJ_NONE) die("object %s not found in type bitmaps", oid_to_hex(&obj->oid)); if (bitmaps_nr > 1) die("object %s does not have a unique type", oid_to_hex(&obj->oid)); if (bitmap_type != obj->type) die("object %s: real type %s, expected: %s", oid_to_hex(&obj->oid), type_name(obj->type), type_name(bitmap_type)); } static void test_show_object(struct object *object, const char *name, void *data) { struct bitmap_test_data *tdata = data; int bitmap_pos; bitmap_pos = bitmap_position(tdata->bitmap_git, &object->oid); if (bitmap_pos < 0) die("Object not in bitmap: %s\n", oid_to_hex(&object->oid)); test_bitmap_type(tdata, object, bitmap_pos); bitmap_set(tdata->base, bitmap_pos); display_progress(tdata->prg, ++tdata->seen); } static void test_show_commit(struct commit *commit, void *data) { struct bitmap_test_data *tdata = data; int bitmap_pos; bitmap_pos = bitmap_position(tdata->bitmap_git, &commit->object.oid); if (bitmap_pos < 0) die("Object not in bitmap: %s\n", oid_to_hex(&commit->object.oid)); test_bitmap_type(tdata, &commit->object, bitmap_pos); bitmap_set(tdata->base, bitmap_pos); display_progress(tdata->prg, ++tdata->seen); } void test_bitmap_walk(struct rev_info *revs) { struct object *root; struct bitmap *result = NULL; size_t result_popcnt; struct bitmap_test_data tdata; struct bitmap_index *bitmap_git; struct ewah_bitmap *bm; if (!(bitmap_git = prepare_bitmap_git(revs->repo))) die("failed to load bitmap indexes"); if (revs->pending.nr != 1) die("you must specify exactly one commit to test"); fprintf(stderr, "Bitmap v%d test (%d entries loaded)\n", bitmap_git->version, bitmap_git->entry_count); root = revs->pending.objects[0].item; bm = bitmap_for_commit(bitmap_git, (struct commit *)root); if (bm) { fprintf(stderr, "Found bitmap for %s. %d bits / %08x checksum\n", oid_to_hex(&root->oid), (int)bm->bit_size, ewah_checksum(bm)); result = ewah_to_bitmap(bm); } if (!result) die("Commit %s doesn't have an indexed bitmap", oid_to_hex(&root->oid)); revs->tag_objects = 1; revs->tree_objects = 1; revs->blob_objects = 1; result_popcnt = bitmap_popcount(result); if (prepare_revision_walk(revs)) die("revision walk setup failed"); tdata.bitmap_git = bitmap_git; tdata.base = bitmap_new(); tdata.commits = ewah_to_bitmap(bitmap_git->commits); tdata.trees = ewah_to_bitmap(bitmap_git->trees); tdata.blobs = ewah_to_bitmap(bitmap_git->blobs); tdata.tags = ewah_to_bitmap(bitmap_git->tags); tdata.prg = start_progress("Verifying bitmap entries", result_popcnt); tdata.seen = 0; traverse_commit_list(revs, &test_show_commit, &test_show_object, &tdata); stop_progress(&tdata.prg); if (bitmap_equals(result, tdata.base)) fprintf(stderr, "OK!\n"); else die("mismatch in bitmap results"); bitmap_free(result); bitmap_free(tdata.base); bitmap_free(tdata.commits); bitmap_free(tdata.trees); bitmap_free(tdata.blobs); bitmap_free(tdata.tags); free_bitmap_index(bitmap_git); } int test_bitmap_commits(struct repository *r) { struct bitmap_index *bitmap_git = prepare_bitmap_git(r); struct object_id oid; MAYBE_UNUSED void *value; if (!bitmap_git) die("failed to load bitmap indexes"); kh_foreach(bitmap_git->bitmaps, oid, value, { printf("%s\n", oid_to_hex(&oid)); }); free_bitmap_index(bitmap_git); return 0; } int test_bitmap_hashes(struct repository *r) { struct bitmap_index *bitmap_git = prepare_bitmap_git(r); struct object_id oid; uint32_t i, index_pos; if (!bitmap_git || !bitmap_git->hashes) goto cleanup; for (i = 0; i < bitmap_num_objects(bitmap_git); i++) { if (bitmap_is_midx(bitmap_git)) index_pos = pack_pos_to_midx(bitmap_git->midx, i); else index_pos = pack_pos_to_index(bitmap_git->pack, i); nth_bitmap_object_oid(bitmap_git, &oid, index_pos); printf("%s %"PRIu32"\n", oid_to_hex(&oid), get_be32(bitmap_git->hashes + index_pos)); } cleanup: free_bitmap_index(bitmap_git); return 0; } int rebuild_bitmap(const uint32_t *reposition, struct ewah_bitmap *source, struct bitmap *dest) { uint32_t pos = 0; struct ewah_iterator it; eword_t word; ewah_iterator_init(&it, source); while (ewah_iterator_next(&word, &it)) { uint32_t offset, bit_pos; for (offset = 0; offset < BITS_IN_EWORD; ++offset) { if ((word >> offset) == 0) break; offset += ewah_bit_ctz64(word >> offset); bit_pos = reposition[pos + offset]; if (bit_pos > 0) bitmap_set(dest, bit_pos - 1); else /* can't reuse, we don't have the object */ return -1; } pos += BITS_IN_EWORD; } return 0; } uint32_t *create_bitmap_mapping(struct bitmap_index *bitmap_git, struct packing_data *mapping) { uint32_t i, num_objects; uint32_t *reposition; if (!bitmap_is_midx(bitmap_git)) load_reverse_index(bitmap_git); else if (load_midx_revindex(bitmap_git->midx) < 0) BUG("rebuild_existing_bitmaps: missing required rev-cache " "extension"); num_objects = bitmap_num_objects(bitmap_git); CALLOC_ARRAY(reposition, num_objects); for (i = 0; i < num_objects; ++i) { struct object_id oid; struct object_entry *oe; uint32_t index_pos; if (bitmap_is_midx(bitmap_git)) index_pos = pack_pos_to_midx(bitmap_git->midx, i); else index_pos = pack_pos_to_index(bitmap_git->pack, i); nth_bitmap_object_oid(bitmap_git, &oid, index_pos); oe = packlist_find(mapping, &oid); if (oe) { reposition[i] = oe_in_pack_pos(mapping, oe) + 1; if (bitmap_git->hashes && !oe->hash) oe->hash = get_be32(bitmap_git->hashes + index_pos); } } return reposition; } void free_bitmap_index(struct bitmap_index *b) { if (!b) return; if (b->map) munmap(b->map, b->map_size); ewah_pool_free(b->commits); ewah_pool_free(b->trees); ewah_pool_free(b->blobs); ewah_pool_free(b->tags); if (b->bitmaps) { struct stored_bitmap *sb; kh_foreach_value(b->bitmaps, sb, { ewah_pool_free(sb->root); free(sb); }); } kh_destroy_oid_map(b->bitmaps); free(b->ext_index.objects); free(b->ext_index.hashes); kh_destroy_oid_pos(b->ext_index.positions); bitmap_free(b->result); bitmap_free(b->haves); if (bitmap_is_midx(b)) { /* * Multi-pack bitmaps need to have resources associated with * their on-disk reverse indexes unmapped so that stale .rev and * .bitmap files can be removed. * * Unlike pack-based bitmaps, multi-pack bitmaps can be read and * written in the same 'git multi-pack-index write --bitmap' * process. Close resources so they can be removed safely on * platforms like Windows. */ close_midx_revindex(b->midx); } free(b); } int bitmap_has_oid_in_uninteresting(struct bitmap_index *bitmap_git, const struct object_id *oid) { return bitmap_git && bitmap_walk_contains(bitmap_git, bitmap_git->haves, oid); } static off_t get_disk_usage_for_type(struct bitmap_index *bitmap_git, enum object_type object_type) { struct bitmap *result = bitmap_git->result; off_t total = 0; struct ewah_iterator it; eword_t filter; size_t i; init_type_iterator(&it, bitmap_git, object_type); for (i = 0; i < result->word_alloc && ewah_iterator_next(&filter, &it); i++) { eword_t word = result->words[i] & filter; size_t base = (i * BITS_IN_EWORD); unsigned offset; if (!word) continue; for (offset = 0; offset < BITS_IN_EWORD; offset++) { if ((word >> offset) == 0) break; offset += ewah_bit_ctz64(word >> offset); if (bitmap_is_midx(bitmap_git)) { uint32_t pack_pos; uint32_t midx_pos = pack_pos_to_midx(bitmap_git->midx, base + offset); off_t offset = nth_midxed_offset(bitmap_git->midx, midx_pos); uint32_t pack_id = nth_midxed_pack_int_id(bitmap_git->midx, midx_pos); struct packed_git *pack = bitmap_git->midx->packs[pack_id]; if (offset_to_pack_pos(pack, offset, &pack_pos) < 0) { struct object_id oid; nth_midxed_object_oid(&oid, bitmap_git->midx, midx_pos); die(_("could not find %s in pack %s at offset %"PRIuMAX), oid_to_hex(&oid), pack->pack_name, (uintmax_t)offset); } total += pack_pos_to_offset(pack, pack_pos + 1) - offset; } else { size_t pos = base + offset; total += pack_pos_to_offset(bitmap_git->pack, pos + 1) - pack_pos_to_offset(bitmap_git->pack, pos); } } } return total; } static off_t get_disk_usage_for_extended(struct bitmap_index *bitmap_git) { struct bitmap *result = bitmap_git->result; struct eindex *eindex = &bitmap_git->ext_index; off_t total = 0; struct object_info oi = OBJECT_INFO_INIT; off_t object_size; size_t i; oi.disk_sizep = &object_size; for (i = 0; i < eindex->count; i++) { struct object *obj = eindex->objects[i]; if (!bitmap_get(result, bitmap_num_objects(bitmap_git) + i)) continue; if (oid_object_info_extended(the_repository, &obj->oid, &oi, 0) < 0) die(_("unable to get disk usage of %s"), oid_to_hex(&obj->oid)); total += object_size; } return total; } off_t get_disk_usage_from_bitmap(struct bitmap_index *bitmap_git, struct rev_info *revs) { off_t total = 0; total += get_disk_usage_for_type(bitmap_git, OBJ_COMMIT); if (revs->tree_objects) total += get_disk_usage_for_type(bitmap_git, OBJ_TREE); if (revs->blob_objects) total += get_disk_usage_for_type(bitmap_git, OBJ_BLOB); if (revs->tag_objects) total += get_disk_usage_for_type(bitmap_git, OBJ_TAG); total += get_disk_usage_for_extended(bitmap_git); return total; } int bitmap_is_midx(struct bitmap_index *bitmap_git) { return !!bitmap_git->midx; } const struct string_list *bitmap_preferred_tips(struct repository *r) { return repo_config_get_value_multi(r, "pack.preferbitmaptips"); } int bitmap_is_preferred_refname(struct repository *r, const char *refname) { const struct string_list *preferred_tips = bitmap_preferred_tips(r); struct string_list_item *item; if (!preferred_tips) return 0; for_each_string_list_item(item, preferred_tips) { if (starts_with(refname, item->string)) return 1; } return 0; }