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synced 2024-08-24 18:26:02 +00:00
![Jeff King](/assets/img/avatar_default.png)
When a bitmap walk has to traverse (to fill in non-bitmapped objects), we use rev_info's include_check mechanism to let us stop the traversal early. But after setting the function and its data parameter, we never clean it up. This means that if the rev_info is used for a subsequent traversal without bitmaps, it will unexpectedly call into our include_check function (worse, it will do so pointing to a now-defunct stack variable in include_check_data, likely resulting in a segfault). There's no code which does this now, but it's an accident waiting to happen. Let's clean up after ourselves in the bitmap code. Reported-by: David Emett <dave@sp4m.net> Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
1517 lines
37 KiB
C
1517 lines
37 KiB
C
#include "cache.h"
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#include "commit.h"
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#include "tag.h"
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#include "diff.h"
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#include "revision.h"
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#include "progress.h"
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#include "list-objects.h"
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#include "pack.h"
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#include "pack-bitmap.h"
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#include "pack-revindex.h"
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#include "pack-objects.h"
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#include "packfile.h"
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#include "repository.h"
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#include "object-store.h"
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#include "list-objects-filter-options.h"
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/*
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* An entry on the bitmap index, representing the bitmap for a given
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* commit.
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*/
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struct stored_bitmap {
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struct object_id oid;
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struct ewah_bitmap *root;
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struct stored_bitmap *xor;
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int flags;
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};
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/*
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* The active bitmap index for a repository. By design, repositories only have
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* a single bitmap index available (the index for the biggest packfile in
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* the repository), since bitmap indexes need full closure.
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*
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* If there is more than one bitmap index available (e.g. because of alternates),
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* the active bitmap index is the largest one.
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*/
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struct bitmap_index {
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/* Packfile to which this bitmap index belongs to */
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struct packed_git *pack;
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/*
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* Mark the first `reuse_objects` in the packfile as reused:
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* they will be sent as-is without using them for repacking
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* calculations
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*/
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uint32_t reuse_objects;
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/* mmapped buffer of the whole bitmap index */
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unsigned char *map;
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size_t map_size; /* size of the mmaped buffer */
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size_t map_pos; /* current position when loading the index */
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/*
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* Type indexes.
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*
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* Each bitmap marks which objects in the packfile are of the given
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* type. This provides type information when yielding the objects from
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* the packfile during a walk, which allows for better delta bases.
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*/
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struct ewah_bitmap *commits;
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struct ewah_bitmap *trees;
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struct ewah_bitmap *blobs;
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struct ewah_bitmap *tags;
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/* Map from object ID -> `stored_bitmap` for all the bitmapped commits */
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kh_oid_map_t *bitmaps;
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/* Number of bitmapped commits */
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uint32_t entry_count;
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/* If not NULL, this is a name-hash cache pointing into map. */
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uint32_t *hashes;
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/*
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* Extended index.
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*
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* When trying to perform bitmap operations with objects that are not
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* packed in `pack`, these objects are added to this "fake index" and
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* are assumed to appear at the end of the packfile for all operations
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*/
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struct eindex {
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struct object **objects;
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uint32_t *hashes;
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uint32_t count, alloc;
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kh_oid_pos_t *positions;
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} ext_index;
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/* Bitmap result of the last performed walk */
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struct bitmap *result;
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/* "have" bitmap from the last performed walk */
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struct bitmap *haves;
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/* Version of the bitmap index */
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unsigned int version;
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};
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static struct ewah_bitmap *lookup_stored_bitmap(struct stored_bitmap *st)
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{
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struct ewah_bitmap *parent;
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struct ewah_bitmap *composed;
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if (st->xor == NULL)
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return st->root;
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composed = ewah_pool_new();
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parent = lookup_stored_bitmap(st->xor);
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ewah_xor(st->root, parent, composed);
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ewah_pool_free(st->root);
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st->root = composed;
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st->xor = NULL;
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return composed;
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}
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/*
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* Read a bitmap from the current read position on the mmaped
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* index, and increase the read position accordingly
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*/
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static struct ewah_bitmap *read_bitmap_1(struct bitmap_index *index)
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{
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struct ewah_bitmap *b = ewah_pool_new();
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ssize_t bitmap_size = ewah_read_mmap(b,
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index->map + index->map_pos,
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index->map_size - index->map_pos);
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if (bitmap_size < 0) {
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error("Failed to load bitmap index (corrupted?)");
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ewah_pool_free(b);
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return NULL;
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}
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index->map_pos += bitmap_size;
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return b;
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}
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static int load_bitmap_header(struct bitmap_index *index)
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{
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struct bitmap_disk_header *header = (void *)index->map;
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size_t header_size = sizeof(*header) - GIT_MAX_RAWSZ + the_hash_algo->rawsz;
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if (index->map_size < header_size + the_hash_algo->rawsz)
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return error("Corrupted bitmap index (too small)");
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if (memcmp(header->magic, BITMAP_IDX_SIGNATURE, sizeof(BITMAP_IDX_SIGNATURE)) != 0)
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return error("Corrupted bitmap index file (wrong header)");
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index->version = ntohs(header->version);
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if (index->version != 1)
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return error("Unsupported version for bitmap index file (%d)", index->version);
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/* Parse known bitmap format options */
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{
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uint32_t flags = ntohs(header->options);
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size_t cache_size = st_mult(index->pack->num_objects, sizeof(uint32_t));
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unsigned char *index_end = index->map + index->map_size - the_hash_algo->rawsz;
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if ((flags & BITMAP_OPT_FULL_DAG) == 0)
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return error("Unsupported options for bitmap index file "
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"(Git requires BITMAP_OPT_FULL_DAG)");
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if (flags & BITMAP_OPT_HASH_CACHE) {
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if (cache_size > index_end - index->map - header_size)
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return error("corrupted bitmap index file (too short to fit hash cache)");
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index->hashes = (void *)(index_end - cache_size);
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index_end -= cache_size;
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}
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}
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index->entry_count = ntohl(header->entry_count);
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index->map_pos += header_size;
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return 0;
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}
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static struct stored_bitmap *store_bitmap(struct bitmap_index *index,
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struct ewah_bitmap *root,
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const struct object_id *oid,
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struct stored_bitmap *xor_with,
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int flags)
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{
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struct stored_bitmap *stored;
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khiter_t hash_pos;
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int ret;
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stored = xmalloc(sizeof(struct stored_bitmap));
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stored->root = root;
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stored->xor = xor_with;
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stored->flags = flags;
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oidcpy(&stored->oid, oid);
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hash_pos = kh_put_oid_map(index->bitmaps, stored->oid, &ret);
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/* a 0 return code means the insertion succeeded with no changes,
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* because the SHA1 already existed on the map. this is bad, there
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* shouldn't be duplicated commits in the index */
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if (ret == 0) {
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error("Duplicate entry in bitmap index: %s", oid_to_hex(oid));
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return NULL;
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}
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kh_value(index->bitmaps, hash_pos) = stored;
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return stored;
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}
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static inline uint32_t read_be32(const unsigned char *buffer, size_t *pos)
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{
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uint32_t result = get_be32(buffer + *pos);
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(*pos) += sizeof(result);
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return result;
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}
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static inline uint8_t read_u8(const unsigned char *buffer, size_t *pos)
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{
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return buffer[(*pos)++];
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}
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#define MAX_XOR_OFFSET 160
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static int load_bitmap_entries_v1(struct bitmap_index *index)
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{
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uint32_t i;
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struct stored_bitmap *recent_bitmaps[MAX_XOR_OFFSET] = { NULL };
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for (i = 0; i < index->entry_count; ++i) {
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int xor_offset, flags;
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struct ewah_bitmap *bitmap = NULL;
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struct stored_bitmap *xor_bitmap = NULL;
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uint32_t commit_idx_pos;
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struct object_id oid;
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if (index->map_size - index->map_pos < 6)
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return error("corrupt ewah bitmap: truncated header for entry %d", i);
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commit_idx_pos = read_be32(index->map, &index->map_pos);
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xor_offset = read_u8(index->map, &index->map_pos);
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flags = read_u8(index->map, &index->map_pos);
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if (nth_packed_object_id(&oid, index->pack, commit_idx_pos) < 0)
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return error("corrupt ewah bitmap: commit index %u out of range",
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(unsigned)commit_idx_pos);
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bitmap = read_bitmap_1(index);
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if (!bitmap)
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return -1;
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if (xor_offset > MAX_XOR_OFFSET || xor_offset > i)
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return error("Corrupted bitmap pack index");
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if (xor_offset > 0) {
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xor_bitmap = recent_bitmaps[(i - xor_offset) % MAX_XOR_OFFSET];
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if (xor_bitmap == NULL)
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return error("Invalid XOR offset in bitmap pack index");
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}
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recent_bitmaps[i % MAX_XOR_OFFSET] = store_bitmap(
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index, bitmap, &oid, xor_bitmap, flags);
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}
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return 0;
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}
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static char *pack_bitmap_filename(struct packed_git *p)
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{
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size_t len;
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if (!strip_suffix(p->pack_name, ".pack", &len))
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BUG("pack_name does not end in .pack");
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return xstrfmt("%.*s.bitmap", (int)len, p->pack_name);
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}
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static int open_pack_bitmap_1(struct bitmap_index *bitmap_git, struct packed_git *packfile)
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{
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int fd;
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struct stat st;
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char *idx_name;
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if (open_pack_index(packfile))
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return -1;
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idx_name = pack_bitmap_filename(packfile);
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fd = git_open(idx_name);
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free(idx_name);
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if (fd < 0)
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return -1;
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if (fstat(fd, &st)) {
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close(fd);
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return -1;
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}
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if (bitmap_git->pack) {
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warning("ignoring extra bitmap file: %s", packfile->pack_name);
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close(fd);
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return -1;
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}
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bitmap_git->pack = packfile;
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bitmap_git->map_size = xsize_t(st.st_size);
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bitmap_git->map = xmmap(NULL, bitmap_git->map_size, PROT_READ, MAP_PRIVATE, fd, 0);
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bitmap_git->map_pos = 0;
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close(fd);
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if (load_bitmap_header(bitmap_git) < 0) {
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munmap(bitmap_git->map, bitmap_git->map_size);
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bitmap_git->map = NULL;
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bitmap_git->map_size = 0;
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return -1;
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}
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return 0;
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}
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static int load_pack_bitmap(struct bitmap_index *bitmap_git)
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{
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assert(bitmap_git->map);
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bitmap_git->bitmaps = kh_init_oid_map();
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bitmap_git->ext_index.positions = kh_init_oid_pos();
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if (load_pack_revindex(bitmap_git->pack))
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goto failed;
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if (!(bitmap_git->commits = read_bitmap_1(bitmap_git)) ||
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!(bitmap_git->trees = read_bitmap_1(bitmap_git)) ||
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!(bitmap_git->blobs = read_bitmap_1(bitmap_git)) ||
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!(bitmap_git->tags = read_bitmap_1(bitmap_git)))
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goto failed;
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if (load_bitmap_entries_v1(bitmap_git) < 0)
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goto failed;
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return 0;
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failed:
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munmap(bitmap_git->map, bitmap_git->map_size);
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bitmap_git->map = NULL;
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bitmap_git->map_size = 0;
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kh_destroy_oid_map(bitmap_git->bitmaps);
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bitmap_git->bitmaps = NULL;
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kh_destroy_oid_pos(bitmap_git->ext_index.positions);
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bitmap_git->ext_index.positions = NULL;
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return -1;
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}
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static int open_pack_bitmap(struct repository *r,
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struct bitmap_index *bitmap_git)
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{
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struct packed_git *p;
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int ret = -1;
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assert(!bitmap_git->map);
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for (p = get_all_packs(r); p; p = p->next) {
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if (open_pack_bitmap_1(bitmap_git, p) == 0)
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ret = 0;
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}
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return ret;
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}
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struct bitmap_index *prepare_bitmap_git(struct repository *r)
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{
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struct bitmap_index *bitmap_git = xcalloc(1, sizeof(*bitmap_git));
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if (!open_pack_bitmap(r, bitmap_git) && !load_pack_bitmap(bitmap_git))
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return bitmap_git;
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free_bitmap_index(bitmap_git);
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return NULL;
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}
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struct include_data {
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struct bitmap_index *bitmap_git;
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struct bitmap *base;
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struct bitmap *seen;
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};
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struct ewah_bitmap *bitmap_for_commit(struct bitmap_index *bitmap_git,
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struct commit *commit)
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{
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khiter_t hash_pos = kh_get_oid_map(bitmap_git->bitmaps,
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commit->object.oid);
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if (hash_pos >= kh_end(bitmap_git->bitmaps))
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return NULL;
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return lookup_stored_bitmap(kh_value(bitmap_git->bitmaps, hash_pos));
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}
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static inline int bitmap_position_extended(struct bitmap_index *bitmap_git,
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const struct object_id *oid)
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{
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kh_oid_pos_t *positions = bitmap_git->ext_index.positions;
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khiter_t pos = kh_get_oid_pos(positions, *oid);
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if (pos < kh_end(positions)) {
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int bitmap_pos = kh_value(positions, pos);
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return bitmap_pos + bitmap_git->pack->num_objects;
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}
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return -1;
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}
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static inline int bitmap_position_packfile(struct bitmap_index *bitmap_git,
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const struct object_id *oid)
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{
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uint32_t pos;
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off_t offset = find_pack_entry_one(oid->hash, bitmap_git->pack);
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if (!offset)
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return -1;
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if (offset_to_pack_pos(bitmap_git->pack, offset, &pos) < 0)
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return -1;
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return pos;
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}
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static int bitmap_position(struct bitmap_index *bitmap_git,
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const struct object_id *oid)
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{
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int pos = bitmap_position_packfile(bitmap_git, oid);
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return (pos >= 0) ? pos : bitmap_position_extended(bitmap_git, oid);
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}
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static int ext_index_add_object(struct bitmap_index *bitmap_git,
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struct object *object, const char *name)
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{
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struct eindex *eindex = &bitmap_git->ext_index;
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khiter_t hash_pos;
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int hash_ret;
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int bitmap_pos;
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hash_pos = kh_put_oid_pos(eindex->positions, object->oid, &hash_ret);
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if (hash_ret > 0) {
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if (eindex->count >= eindex->alloc) {
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eindex->alloc = (eindex->alloc + 16) * 3 / 2;
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REALLOC_ARRAY(eindex->objects, eindex->alloc);
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REALLOC_ARRAY(eindex->hashes, eindex->alloc);
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}
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bitmap_pos = eindex->count;
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eindex->objects[eindex->count] = object;
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eindex->hashes[eindex->count] = pack_name_hash(name);
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kh_value(eindex->positions, hash_pos) = bitmap_pos;
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eindex->count++;
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} else {
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bitmap_pos = kh_value(eindex->positions, hash_pos);
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}
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return bitmap_pos + bitmap_git->pack->num_objects;
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}
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struct bitmap_show_data {
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struct bitmap_index *bitmap_git;
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struct bitmap *base;
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};
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static void show_object(struct object *object, const char *name, void *data_)
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{
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struct bitmap_show_data *data = data_;
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int bitmap_pos;
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bitmap_pos = bitmap_position(data->bitmap_git, &object->oid);
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if (bitmap_pos < 0)
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bitmap_pos = ext_index_add_object(data->bitmap_git, object,
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name);
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bitmap_set(data->base, bitmap_pos);
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}
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|
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static void show_commit(struct commit *commit, void *data)
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{
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}
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|
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static int add_to_include_set(struct bitmap_index *bitmap_git,
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struct include_data *data,
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struct commit *commit,
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int bitmap_pos)
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{
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struct ewah_bitmap *partial;
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if (data->seen && bitmap_get(data->seen, bitmap_pos))
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return 0;
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if (bitmap_get(data->base, bitmap_pos))
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return 0;
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partial = bitmap_for_commit(bitmap_git, commit);
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if (partial) {
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bitmap_or_ewah(data->base, partial);
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return 0;
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}
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bitmap_set(data->base, bitmap_pos);
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return 1;
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}
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|
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static int should_include(struct commit *commit, void *_data)
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{
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struct include_data *data = _data;
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int bitmap_pos;
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bitmap_pos = bitmap_position(data->bitmap_git, &commit->object.oid);
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if (bitmap_pos < 0)
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bitmap_pos = ext_index_add_object(data->bitmap_git,
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(struct object *)commit,
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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 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 == NULL)
|
|
*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 list_objects_filter_options *filter)
|
|
{
|
|
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 == NULL)
|
|
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 == NULL)
|
|
base = bitmap_new();
|
|
|
|
incdata.bitmap_git = bitmap_git;
|
|
incdata.base = base;
|
|
incdata.seen = seen;
|
|
|
|
revs->include_check = should_include;
|
|
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_filtered(filter, revs,
|
|
show_commit, show_object,
|
|
&show_data, NULL);
|
|
|
|
revs->include_check = 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_git->pack->num_objects + 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 object_id oid;
|
|
uint32_t hash = 0, index_pos;
|
|
off_t ofs;
|
|
|
|
if ((word >> offset) == 0)
|
|
break;
|
|
|
|
offset += ewah_bit_ctz64(word >> offset);
|
|
|
|
index_pos = pack_pos_to_index(bitmap_git->pack, pos + offset);
|
|
ofs = pack_pos_to_offset(bitmap_git->pack, pos + offset);
|
|
nth_packed_object_id(&oid, bitmap_git->pack, index_pos);
|
|
|
|
if (bitmap_git->hashes)
|
|
hash = get_be32(bitmap_git->hashes + index_pos);
|
|
|
|
show_reach(&oid, object_type, 0, hash, bitmap_git->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 (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;
|
|
|
|
if (type != OBJ_BLOB && type != OBJ_TREE)
|
|
BUG("filter_bitmap_exclude_type: unsupported type '%d'", type);
|
|
|
|
/*
|
|
* 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 blob type-bitmap 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 blobs 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_git->pack->num_objects;
|
|
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)
|
|
{
|
|
struct packed_git *pack = bitmap_git->pack;
|
|
unsigned long size;
|
|
struct object_info oi = OBJECT_INFO_INIT;
|
|
|
|
oi.sizep = &size;
|
|
|
|
if (pos < pack->num_objects) {
|
|
off_t ofs = pack_pos_to_offset(pack, pos);
|
|
if (packed_object_info(the_repository, pack, ofs, &oi) < 0) {
|
|
struct object_id oid;
|
|
nth_packed_object_id(&oid, pack,
|
|
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 - pack->num_objects];
|
|
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_git->pack->num_objects;
|
|
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 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;
|
|
}
|
|
|
|
/* 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,
|
|
struct list_objects_filter_options *filter)
|
|
{
|
|
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(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_pack_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);
|
|
}
|
|
|
|
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_pack_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,
|
|
filter);
|
|
reset_revision_walk();
|
|
revs->ignore_missing_links = 0;
|
|
|
|
if (haves_bitmap == NULL)
|
|
BUG("failed to perform bitmap walk");
|
|
}
|
|
|
|
wants_bitmap = find_objects(bitmap_git, revs, wants, haves_bitmap,
|
|
filter);
|
|
|
|
if (!wants_bitmap)
|
|
BUG("failed to perform bitmap walk");
|
|
|
|
if (haves_bitmap)
|
|
bitmap_and_not(wants_bitmap, haves_bitmap);
|
|
|
|
filter_bitmap(bitmap_git, wants, wants_bitmap, 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;
|
|
}
|
|
|
|
static void try_partial_reuse(struct bitmap_index *bitmap_git,
|
|
size_t pos,
|
|
struct bitmap *reuse,
|
|
struct pack_window **w_curs)
|
|
{
|
|
off_t offset, header;
|
|
enum object_type type;
|
|
unsigned long size;
|
|
|
|
if (pos >= bitmap_git->pack->num_objects)
|
|
return; /* not actually in the pack */
|
|
|
|
offset = header = pack_pos_to_offset(bitmap_git->pack, pos);
|
|
type = unpack_object_header(bitmap_git->pack, w_curs, &offset, &size);
|
|
if (type < 0)
|
|
return; /* 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(bitmap_git->pack, w_curs,
|
|
&offset, type, header);
|
|
if (!base_offset)
|
|
return;
|
|
if (offset_to_pack_pos(bitmap_git->pack, base_offset, &base_pos) < 0)
|
|
return;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
/*
|
|
* If we got here, then the object is OK to reuse. Mark it.
|
|
*/
|
|
bitmap_set(reuse, pos);
|
|
}
|
|
|
|
int reuse_partial_packfile_from_bitmap(struct bitmap_index *bitmap_git,
|
|
struct packed_git **packfile_out,
|
|
uint32_t *entries,
|
|
struct bitmap **reuse_out)
|
|
{
|
|
struct bitmap *result = bitmap_git->result;
|
|
struct bitmap *reuse;
|
|
struct pack_window *w_curs = NULL;
|
|
size_t i = 0;
|
|
uint32_t offset;
|
|
|
|
assert(result);
|
|
|
|
while (i < result->word_alloc && result->words[i] == (eword_t)~0)
|
|
i++;
|
|
|
|
/* Don't mark objects not in the packfile */
|
|
if (i > bitmap_git->pack->num_objects / BITS_IN_EWORD)
|
|
i = bitmap_git->pack->num_objects / 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);
|
|
try_partial_reuse(bitmap_git, pos + offset, reuse, &w_curs);
|
|
}
|
|
}
|
|
|
|
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 = bitmap_git->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_git->pack->num_objects + 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 progress *prg;
|
|
size_t seen;
|
|
};
|
|
|
|
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));
|
|
|
|
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));
|
|
|
|
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 == NULL)
|
|
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.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");
|
|
|
|
free_bitmap_index(bitmap_git);
|
|
}
|
|
|
|
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;
|
|
|
|
num_objects = bitmap_git->pack->num_objects;
|
|
CALLOC_ARRAY(reposition, num_objects);
|
|
|
|
for (i = 0; i < num_objects; ++i) {
|
|
struct object_id oid;
|
|
struct object_entry *oe;
|
|
|
|
nth_packed_object_id(&oid, bitmap_git->pack,
|
|
pack_pos_to_index(bitmap_git->pack, i));
|
|
oe = packlist_find(mapping, &oid);
|
|
|
|
if (oe)
|
|
reposition[i] = oe_in_pack_pos(mapping, oe) + 1;
|
|
}
|
|
|
|
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);
|
|
kh_destroy_oid_map(b->bitmaps);
|
|
free(b->ext_index.objects);
|
|
free(b->ext_index.hashes);
|
|
bitmap_free(b->result);
|
|
bitmap_free(b->haves);
|
|
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;
|
|
struct packed_git *pack = bitmap_git->pack;
|
|
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++) {
|
|
size_t pos;
|
|
|
|
if ((word >> offset) == 0)
|
|
break;
|
|
|
|
offset += ewah_bit_ctz64(word >> offset);
|
|
pos = base + offset;
|
|
total += pack_pos_to_offset(pack, pos + 1) -
|
|
pack_pos_to_offset(pack, pos);
|
|
}
|
|
}
|
|
|
|
return total;
|
|
}
|
|
|
|
static off_t get_disk_usage_for_extended(struct bitmap_index *bitmap_git)
|
|
{
|
|
struct bitmap *result = bitmap_git->result;
|
|
struct packed_git *pack = bitmap_git->pack;
|
|
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, pack->num_objects + 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;
|
|
}
|