diff options
Diffstat (limited to 'third_party/git/commit-graph.c')
| -rw-r--r-- | third_party/git/commit-graph.c | 2525 |
1 files changed, 0 insertions, 2525 deletions
diff --git a/third_party/git/commit-graph.c b/third_party/git/commit-graph.c deleted file mode 100644 index cb042bdba8c8..000000000000 --- a/third_party/git/commit-graph.c +++ /dev/null @@ -1,2525 +0,0 @@ -#include "git-compat-util.h" -#include "config.h" -#include "lockfile.h" -#include "pack.h" -#include "packfile.h" -#include "commit.h" -#include "object.h" -#include "refs.h" -#include "revision.h" -#include "sha1-lookup.h" -#include "commit-graph.h" -#include "object-store.h" -#include "alloc.h" -#include "hashmap.h" -#include "replace-object.h" -#include "progress.h" -#include "bloom.h" -#include "commit-slab.h" -#include "shallow.h" -#include "json-writer.h" -#include "trace2.h" - -void git_test_write_commit_graph_or_die(void) -{ - int flags = 0; - if (!git_env_bool(GIT_TEST_COMMIT_GRAPH, 0)) - return; - - if (git_env_bool(GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS, 0)) - flags = COMMIT_GRAPH_WRITE_BLOOM_FILTERS; - - if (write_commit_graph_reachable(the_repository->objects->odb, - flags, NULL)) - die("failed to write commit-graph under GIT_TEST_COMMIT_GRAPH"); -} - -#define GRAPH_SIGNATURE 0x43475048 /* "CGPH" */ -#define GRAPH_CHUNKID_OIDFANOUT 0x4f494446 /* "OIDF" */ -#define GRAPH_CHUNKID_OIDLOOKUP 0x4f49444c /* "OIDL" */ -#define GRAPH_CHUNKID_DATA 0x43444154 /* "CDAT" */ -#define GRAPH_CHUNKID_EXTRAEDGES 0x45444745 /* "EDGE" */ -#define GRAPH_CHUNKID_BLOOMINDEXES 0x42494458 /* "BIDX" */ -#define GRAPH_CHUNKID_BLOOMDATA 0x42444154 /* "BDAT" */ -#define GRAPH_CHUNKID_BASE 0x42415345 /* "BASE" */ -#define MAX_NUM_CHUNKS 7 - -#define GRAPH_DATA_WIDTH (the_hash_algo->rawsz + 16) - -#define GRAPH_VERSION_1 0x1 -#define GRAPH_VERSION GRAPH_VERSION_1 - -#define GRAPH_EXTRA_EDGES_NEEDED 0x80000000 -#define GRAPH_EDGE_LAST_MASK 0x7fffffff -#define GRAPH_PARENT_NONE 0x70000000 - -#define GRAPH_LAST_EDGE 0x80000000 - -#define GRAPH_HEADER_SIZE 8 -#define GRAPH_FANOUT_SIZE (4 * 256) -#define GRAPH_CHUNKLOOKUP_WIDTH 12 -#define GRAPH_MIN_SIZE (GRAPH_HEADER_SIZE + 4 * GRAPH_CHUNKLOOKUP_WIDTH \ - + GRAPH_FANOUT_SIZE + the_hash_algo->rawsz) - -/* Remember to update object flag allocation in object.h */ -#define REACHABLE (1u<<15) - -/* Keep track of the order in which commits are added to our list. */ -define_commit_slab(commit_pos, int); -static struct commit_pos commit_pos = COMMIT_SLAB_INIT(1, commit_pos); - -static void set_commit_pos(struct repository *r, const struct object_id *oid) -{ - static int32_t max_pos; - struct commit *commit = lookup_commit(r, oid); - - if (!commit) - return; /* should never happen, but be lenient */ - - *commit_pos_at(&commit_pos, commit) = max_pos++; -} - -static int commit_pos_cmp(const void *va, const void *vb) -{ - const struct commit *a = *(const struct commit **)va; - const struct commit *b = *(const struct commit **)vb; - return commit_pos_at(&commit_pos, a) - - commit_pos_at(&commit_pos, b); -} - -define_commit_slab(commit_graph_data_slab, struct commit_graph_data); -static struct commit_graph_data_slab commit_graph_data_slab = - COMMIT_SLAB_INIT(1, commit_graph_data_slab); - -uint32_t commit_graph_position(const struct commit *c) -{ - struct commit_graph_data *data = - commit_graph_data_slab_peek(&commit_graph_data_slab, c); - - return data ? data->graph_pos : COMMIT_NOT_FROM_GRAPH; -} - -uint32_t commit_graph_generation(const struct commit *c) -{ - struct commit_graph_data *data = - commit_graph_data_slab_peek(&commit_graph_data_slab, c); - - if (!data) - return GENERATION_NUMBER_INFINITY; - else if (data->graph_pos == COMMIT_NOT_FROM_GRAPH) - return GENERATION_NUMBER_INFINITY; - - return data->generation; -} - -static struct commit_graph_data *commit_graph_data_at(const struct commit *c) -{ - unsigned int i, nth_slab; - struct commit_graph_data *data = - commit_graph_data_slab_peek(&commit_graph_data_slab, c); - - if (data) - return data; - - nth_slab = c->index / commit_graph_data_slab.slab_size; - data = commit_graph_data_slab_at(&commit_graph_data_slab, c); - - /* - * commit-slab initializes elements with zero, overwrite this with - * COMMIT_NOT_FROM_GRAPH for graph_pos. - * - * We avoid initializing generation with checking if graph position - * is not COMMIT_NOT_FROM_GRAPH. - */ - for (i = 0; i < commit_graph_data_slab.slab_size; i++) { - commit_graph_data_slab.slab[nth_slab][i].graph_pos = - COMMIT_NOT_FROM_GRAPH; - } - - return data; -} - -static int commit_gen_cmp(const void *va, const void *vb) -{ - const struct commit *a = *(const struct commit **)va; - const struct commit *b = *(const struct commit **)vb; - - uint32_t generation_a = commit_graph_generation(a); - uint32_t generation_b = commit_graph_generation(b); - /* lower generation commits first */ - if (generation_a < generation_b) - return -1; - else if (generation_a > generation_b) - return 1; - - /* use date as a heuristic when generations are equal */ - if (a->date < b->date) - return -1; - else if (a->date > b->date) - return 1; - return 0; -} - -char *get_commit_graph_filename(struct object_directory *obj_dir) -{ - return xstrfmt("%s/info/commit-graph", obj_dir->path); -} - -static char *get_split_graph_filename(struct object_directory *odb, - const char *oid_hex) -{ - return xstrfmt("%s/info/commit-graphs/graph-%s.graph", odb->path, - oid_hex); -} - -char *get_commit_graph_chain_filename(struct object_directory *odb) -{ - return xstrfmt("%s/info/commit-graphs/commit-graph-chain", odb->path); -} - -static uint8_t oid_version(void) -{ - switch (hash_algo_by_ptr(the_hash_algo)) { - case GIT_HASH_SHA1: - return 1; - case GIT_HASH_SHA256: - return 2; - default: - die(_("invalid hash version")); - } -} - -static struct commit_graph *alloc_commit_graph(void) -{ - struct commit_graph *g = xcalloc(1, sizeof(*g)); - - return g; -} - -extern int read_replace_refs; - -static int commit_graph_compatible(struct repository *r) -{ - if (!r->gitdir) - return 0; - - if (read_replace_refs) { - prepare_replace_object(r); - if (hashmap_get_size(&r->objects->replace_map->map)) - return 0; - } - - prepare_commit_graft(r); - if (r->parsed_objects && - (r->parsed_objects->grafts_nr || r->parsed_objects->substituted_parent)) - return 0; - if (is_repository_shallow(r)) - return 0; - - return 1; -} - -int open_commit_graph(const char *graph_file, int *fd, struct stat *st) -{ - *fd = git_open(graph_file); - if (*fd < 0) - return 0; - if (fstat(*fd, st)) { - close(*fd); - return 0; - } - return 1; -} - -struct commit_graph *load_commit_graph_one_fd_st(struct repository *r, - int fd, struct stat *st, - struct object_directory *odb) -{ - void *graph_map; - size_t graph_size; - struct commit_graph *ret; - - graph_size = xsize_t(st->st_size); - - if (graph_size < GRAPH_MIN_SIZE) { - close(fd); - error(_("commit-graph file is too small")); - return NULL; - } - graph_map = xmmap(NULL, graph_size, PROT_READ, MAP_PRIVATE, fd, 0); - close(fd); - ret = parse_commit_graph(r, graph_map, graph_size); - - if (ret) - ret->odb = odb; - else - munmap(graph_map, graph_size); - - return ret; -} - -static int verify_commit_graph_lite(struct commit_graph *g) -{ - /* - * Basic validation shared between parse_commit_graph() - * which'll be called every time the graph is used, and the - * much more expensive verify_commit_graph() used by - * "commit-graph verify". - * - * There should only be very basic checks here to ensure that - * we don't e.g. segfault in fill_commit_in_graph(), but - * because this is a very hot codepath nothing that e.g. loops - * over g->num_commits, or runs a checksum on the commit-graph - * itself. - */ - if (!g->chunk_oid_fanout) { - error("commit-graph is missing the OID Fanout chunk"); - return 1; - } - if (!g->chunk_oid_lookup) { - error("commit-graph is missing the OID Lookup chunk"); - return 1; - } - if (!g->chunk_commit_data) { - error("commit-graph is missing the Commit Data chunk"); - return 1; - } - - return 0; -} - -struct commit_graph *parse_commit_graph(struct repository *r, - void *graph_map, size_t graph_size) -{ - const unsigned char *data, *chunk_lookup; - uint32_t i; - struct commit_graph *graph; - uint64_t next_chunk_offset; - uint32_t graph_signature; - unsigned char graph_version, hash_version; - - if (!graph_map) - return NULL; - - if (graph_size < GRAPH_MIN_SIZE) - return NULL; - - data = (const unsigned char *)graph_map; - - graph_signature = get_be32(data); - if (graph_signature != GRAPH_SIGNATURE) { - error(_("commit-graph signature %X does not match signature %X"), - graph_signature, GRAPH_SIGNATURE); - return NULL; - } - - graph_version = *(unsigned char*)(data + 4); - if (graph_version != GRAPH_VERSION) { - error(_("commit-graph version %X does not match version %X"), - graph_version, GRAPH_VERSION); - return NULL; - } - - hash_version = *(unsigned char*)(data + 5); - if (hash_version != oid_version()) { - error(_("commit-graph hash version %X does not match version %X"), - hash_version, oid_version()); - return NULL; - } - - prepare_repo_settings(r); - - graph = alloc_commit_graph(); - - graph->hash_len = the_hash_algo->rawsz; - graph->num_chunks = *(unsigned char*)(data + 6); - graph->data = graph_map; - graph->data_len = graph_size; - - if (graph_size < GRAPH_HEADER_SIZE + - (graph->num_chunks + 1) * GRAPH_CHUNKLOOKUP_WIDTH + - GRAPH_FANOUT_SIZE + the_hash_algo->rawsz) { - error(_("commit-graph file is too small to hold %u chunks"), - graph->num_chunks); - free(graph); - return NULL; - } - - chunk_lookup = data + 8; - next_chunk_offset = get_be64(chunk_lookup + 4); - for (i = 0; i < graph->num_chunks; i++) { - uint32_t chunk_id; - uint64_t chunk_offset = next_chunk_offset; - int chunk_repeated = 0; - - chunk_id = get_be32(chunk_lookup + 0); - - chunk_lookup += GRAPH_CHUNKLOOKUP_WIDTH; - next_chunk_offset = get_be64(chunk_lookup + 4); - - if (chunk_offset > graph_size - the_hash_algo->rawsz) { - error(_("commit-graph improper chunk offset %08x%08x"), (uint32_t)(chunk_offset >> 32), - (uint32_t)chunk_offset); - goto free_and_return; - } - - switch (chunk_id) { - case GRAPH_CHUNKID_OIDFANOUT: - if (graph->chunk_oid_fanout) - chunk_repeated = 1; - else - graph->chunk_oid_fanout = (uint32_t*)(data + chunk_offset); - break; - - case GRAPH_CHUNKID_OIDLOOKUP: - if (graph->chunk_oid_lookup) - chunk_repeated = 1; - else { - graph->chunk_oid_lookup = data + chunk_offset; - graph->num_commits = (next_chunk_offset - chunk_offset) - / graph->hash_len; - } - break; - - case GRAPH_CHUNKID_DATA: - if (graph->chunk_commit_data) - chunk_repeated = 1; - else - graph->chunk_commit_data = data + chunk_offset; - break; - - case GRAPH_CHUNKID_EXTRAEDGES: - if (graph->chunk_extra_edges) - chunk_repeated = 1; - else - graph->chunk_extra_edges = data + chunk_offset; - break; - - case GRAPH_CHUNKID_BASE: - if (graph->chunk_base_graphs) - chunk_repeated = 1; - else - graph->chunk_base_graphs = data + chunk_offset; - break; - - case GRAPH_CHUNKID_BLOOMINDEXES: - if (graph->chunk_bloom_indexes) - chunk_repeated = 1; - else if (r->settings.commit_graph_read_changed_paths) - graph->chunk_bloom_indexes = data + chunk_offset; - break; - - case GRAPH_CHUNKID_BLOOMDATA: - if (graph->chunk_bloom_data) - chunk_repeated = 1; - else if (r->settings.commit_graph_read_changed_paths) { - uint32_t hash_version; - graph->chunk_bloom_data = data + chunk_offset; - hash_version = get_be32(data + chunk_offset); - - if (hash_version != 1) - break; - - graph->bloom_filter_settings = xmalloc(sizeof(struct bloom_filter_settings)); - graph->bloom_filter_settings->hash_version = hash_version; - graph->bloom_filter_settings->num_hashes = get_be32(data + chunk_offset + 4); - graph->bloom_filter_settings->bits_per_entry = get_be32(data + chunk_offset + 8); - graph->bloom_filter_settings->max_changed_paths = DEFAULT_BLOOM_MAX_CHANGES; - } - break; - } - - if (chunk_repeated) { - error(_("commit-graph chunk id %08x appears multiple times"), chunk_id); - goto free_and_return; - } - } - - if (graph->chunk_bloom_indexes && graph->chunk_bloom_data) { - init_bloom_filters(); - } else { - /* We need both the bloom chunks to exist together. Else ignore the data */ - graph->chunk_bloom_indexes = NULL; - graph->chunk_bloom_data = NULL; - FREE_AND_NULL(graph->bloom_filter_settings); - } - - hashcpy(graph->oid.hash, graph->data + graph->data_len - graph->hash_len); - - if (verify_commit_graph_lite(graph)) - goto free_and_return; - - return graph; - -free_and_return: - free(graph->bloom_filter_settings); - free(graph); - return NULL; -} - -static struct commit_graph *load_commit_graph_one(struct repository *r, - const char *graph_file, - struct object_directory *odb) -{ - - struct stat st; - int fd; - struct commit_graph *g; - int open_ok = open_commit_graph(graph_file, &fd, &st); - - if (!open_ok) - return NULL; - - g = load_commit_graph_one_fd_st(r, fd, &st, odb); - - if (g) - g->filename = xstrdup(graph_file); - - return g; -} - -static struct commit_graph *load_commit_graph_v1(struct repository *r, - struct object_directory *odb) -{ - char *graph_name = get_commit_graph_filename(odb); - struct commit_graph *g = load_commit_graph_one(r, graph_name, odb); - free(graph_name); - - return g; -} - -static int add_graph_to_chain(struct commit_graph *g, - struct commit_graph *chain, - struct object_id *oids, - int n) -{ - struct commit_graph *cur_g = chain; - - if (n && !g->chunk_base_graphs) { - warning(_("commit-graph has no base graphs chunk")); - return 0; - } - - while (n) { - n--; - - if (!cur_g || - !oideq(&oids[n], &cur_g->oid) || - !hasheq(oids[n].hash, g->chunk_base_graphs + g->hash_len * n)) { - warning(_("commit-graph chain does not match")); - return 0; - } - - cur_g = cur_g->base_graph; - } - - g->base_graph = chain; - - if (chain) - g->num_commits_in_base = chain->num_commits + chain->num_commits_in_base; - - return 1; -} - -static struct commit_graph *load_commit_graph_chain(struct repository *r, - struct object_directory *odb) -{ - struct commit_graph *graph_chain = NULL; - struct strbuf line = STRBUF_INIT; - struct stat st; - struct object_id *oids; - int i = 0, valid = 1, count; - char *chain_name = get_commit_graph_chain_filename(odb); - FILE *fp; - int stat_res; - - fp = fopen(chain_name, "r"); - stat_res = stat(chain_name, &st); - free(chain_name); - - if (!fp || - stat_res || - st.st_size <= the_hash_algo->hexsz) - return NULL; - - count = st.st_size / (the_hash_algo->hexsz + 1); - oids = xcalloc(count, sizeof(struct object_id)); - - prepare_alt_odb(r); - - for (i = 0; i < count; i++) { - struct object_directory *odb; - - if (strbuf_getline_lf(&line, fp) == EOF) - break; - - if (get_oid_hex(line.buf, &oids[i])) { - warning(_("invalid commit-graph chain: line '%s' not a hash"), - line.buf); - valid = 0; - break; - } - - valid = 0; - for (odb = r->objects->odb; odb; odb = odb->next) { - char *graph_name = get_split_graph_filename(odb, line.buf); - struct commit_graph *g = load_commit_graph_one(r, graph_name, odb); - - free(graph_name); - - if (g) { - if (add_graph_to_chain(g, graph_chain, oids, i)) { - graph_chain = g; - valid = 1; - } - - break; - } - } - - if (!valid) { - warning(_("unable to find all commit-graph files")); - break; - } - } - - free(oids); - fclose(fp); - strbuf_release(&line); - - return graph_chain; -} - -struct commit_graph *read_commit_graph_one(struct repository *r, - struct object_directory *odb) -{ - struct commit_graph *g = load_commit_graph_v1(r, odb); - - if (!g) - g = load_commit_graph_chain(r, odb); - - return g; -} - -static void prepare_commit_graph_one(struct repository *r, - struct object_directory *odb) -{ - - if (r->objects->commit_graph) - return; - - r->objects->commit_graph = read_commit_graph_one(r, odb); -} - -/* - * Return 1 if commit_graph is non-NULL, and 0 otherwise. - * - * On the first invocation, this function attempts to load the commit - * graph if the_repository is configured to have one. - */ -static int prepare_commit_graph(struct repository *r) -{ - struct object_directory *odb; - - /* - * This must come before the "already attempted?" check below, because - * we want to disable even an already-loaded graph file. - */ - if (r->commit_graph_disabled) - return 0; - - if (r->objects->commit_graph_attempted) - return !!r->objects->commit_graph; - r->objects->commit_graph_attempted = 1; - - prepare_repo_settings(r); - - if (!git_env_bool(GIT_TEST_COMMIT_GRAPH, 0) && - r->settings.core_commit_graph != 1) - /* - * This repository is not configured to use commit graphs, so - * do not load one. (But report commit_graph_attempted anyway - * so that commit graph loading is not attempted again for this - * repository.) - */ - return 0; - - if (!commit_graph_compatible(r)) - return 0; - - prepare_alt_odb(r); - for (odb = r->objects->odb; - !r->objects->commit_graph && odb; - odb = odb->next) - prepare_commit_graph_one(r, odb); - return !!r->objects->commit_graph; -} - -int generation_numbers_enabled(struct repository *r) -{ - uint32_t first_generation; - struct commit_graph *g; - if (!prepare_commit_graph(r)) - return 0; - - g = r->objects->commit_graph; - - if (!g->num_commits) - return 0; - - first_generation = get_be32(g->chunk_commit_data + - g->hash_len + 8) >> 2; - - return !!first_generation; -} - -struct bloom_filter_settings *get_bloom_filter_settings(struct repository *r) -{ - struct commit_graph *g = r->objects->commit_graph; - while (g) { - if (g->bloom_filter_settings) - return g->bloom_filter_settings; - g = g->base_graph; - } - return NULL; -} - -static void close_commit_graph_one(struct commit_graph *g) -{ - if (!g) - return; - - close_commit_graph_one(g->base_graph); - free_commit_graph(g); -} - -void close_commit_graph(struct raw_object_store *o) -{ - close_commit_graph_one(o->commit_graph); - o->commit_graph = NULL; -} - -static int bsearch_graph(struct commit_graph *g, struct object_id *oid, uint32_t *pos) -{ - return bsearch_hash(oid->hash, g->chunk_oid_fanout, - g->chunk_oid_lookup, g->hash_len, pos); -} - -static void load_oid_from_graph(struct commit_graph *g, - uint32_t pos, - struct object_id *oid) -{ - uint32_t lex_index; - - while (g && pos < g->num_commits_in_base) - g = g->base_graph; - - if (!g) - BUG("NULL commit-graph"); - - if (pos >= g->num_commits + g->num_commits_in_base) - die(_("invalid commit position. commit-graph is likely corrupt")); - - lex_index = pos - g->num_commits_in_base; - - hashcpy(oid->hash, g->chunk_oid_lookup + g->hash_len * lex_index); -} - -static struct commit_list **insert_parent_or_die(struct repository *r, - struct commit_graph *g, - uint32_t pos, - struct commit_list **pptr) -{ - struct commit *c; - struct object_id oid; - - if (pos >= g->num_commits + g->num_commits_in_base) - die("invalid parent position %"PRIu32, pos); - - load_oid_from_graph(g, pos, &oid); - c = lookup_commit(r, &oid); - if (!c) - die(_("could not find commit %s"), oid_to_hex(&oid)); - commit_graph_data_at(c)->graph_pos = pos; - return &commit_list_insert(c, pptr)->next; -} - -static void fill_commit_graph_info(struct commit *item, struct commit_graph *g, uint32_t pos) -{ - const unsigned char *commit_data; - struct commit_graph_data *graph_data; - uint32_t lex_index; - - while (pos < g->num_commits_in_base) - g = g->base_graph; - - lex_index = pos - g->num_commits_in_base; - commit_data = g->chunk_commit_data + GRAPH_DATA_WIDTH * lex_index; - - graph_data = commit_graph_data_at(item); - graph_data->graph_pos = pos; - graph_data->generation = get_be32(commit_data + g->hash_len + 8) >> 2; -} - -static inline void set_commit_tree(struct commit *c, struct tree *t) -{ - c->maybe_tree = t; -} - -static int fill_commit_in_graph(struct repository *r, - struct commit *item, - struct commit_graph *g, uint32_t pos) -{ - uint32_t edge_value; - uint32_t *parent_data_ptr; - uint64_t date_low, date_high; - struct commit_list **pptr; - struct commit_graph_data *graph_data; - const unsigned char *commit_data; - uint32_t lex_index; - - while (pos < g->num_commits_in_base) - g = g->base_graph; - - if (pos >= g->num_commits + g->num_commits_in_base) - die(_("invalid commit position. commit-graph is likely corrupt")); - - /* - * Store the "full" position, but then use the - * "local" position for the rest of the calculation. - */ - graph_data = commit_graph_data_at(item); - graph_data->graph_pos = pos; - lex_index = pos - g->num_commits_in_base; - - commit_data = g->chunk_commit_data + (g->hash_len + 16) * lex_index; - - item->object.parsed = 1; - - set_commit_tree(item, NULL); - - date_high = get_be32(commit_data + g->hash_len + 8) & 0x3; - date_low = get_be32(commit_data + g->hash_len + 12); - item->date = (timestamp_t)((date_high << 32) | date_low); - - graph_data->generation = get_be32(commit_data + g->hash_len + 8) >> 2; - - pptr = &item->parents; - - edge_value = get_be32(commit_data + g->hash_len); - if (edge_value == GRAPH_PARENT_NONE) - return 1; - pptr = insert_parent_or_die(r, g, edge_value, pptr); - - edge_value = get_be32(commit_data + g->hash_len + 4); - if (edge_value == GRAPH_PARENT_NONE) - return 1; - if (!(edge_value & GRAPH_EXTRA_EDGES_NEEDED)) { - pptr = insert_parent_or_die(r, g, edge_value, pptr); - return 1; - } - - parent_data_ptr = (uint32_t*)(g->chunk_extra_edges + - 4 * (uint64_t)(edge_value & GRAPH_EDGE_LAST_MASK)); - do { - edge_value = get_be32(parent_data_ptr); - pptr = insert_parent_or_die(r, g, - edge_value & GRAPH_EDGE_LAST_MASK, - pptr); - parent_data_ptr++; - } while (!(edge_value & GRAPH_LAST_EDGE)); - - return 1; -} - -static int find_commit_in_graph(struct commit *item, struct commit_graph *g, uint32_t *pos) -{ - uint32_t graph_pos = commit_graph_position(item); - if (graph_pos != COMMIT_NOT_FROM_GRAPH) { - *pos = graph_pos; - return 1; - } else { - struct commit_graph *cur_g = g; - uint32_t lex_index; - - while (cur_g && !bsearch_graph(cur_g, &(item->object.oid), &lex_index)) - cur_g = cur_g->base_graph; - - if (cur_g) { - *pos = lex_index + cur_g->num_commits_in_base; - return 1; - } - - return 0; - } -} - -static int parse_commit_in_graph_one(struct repository *r, - struct commit_graph *g, - struct commit *item) -{ - uint32_t pos; - - if (item->object.parsed) - return 1; - - if (find_commit_in_graph(item, g, &pos)) - return fill_commit_in_graph(r, item, g, pos); - - return 0; -} - -int parse_commit_in_graph(struct repository *r, struct commit *item) -{ - static int checked_env = 0; - - if (!checked_env && - git_env_bool(GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE, 0)) - die("dying as requested by the '%s' variable on commit-graph parse!", - GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE); - checked_env = 1; - - if (!prepare_commit_graph(r)) - return 0; - return parse_commit_in_graph_one(r, r->objects->commit_graph, item); -} - -void load_commit_graph_info(struct repository *r, struct commit *item) -{ - uint32_t pos; - if (!prepare_commit_graph(r)) - return; - if (find_commit_in_graph(item, r->objects->commit_graph, &pos)) - fill_commit_graph_info(item, r->objects->commit_graph, pos); -} - -static struct tree *load_tree_for_commit(struct repository *r, - struct commit_graph *g, - struct commit *c) -{ - struct object_id oid; - const unsigned char *commit_data; - uint32_t graph_pos = commit_graph_position(c); - - while (graph_pos < g->num_commits_in_base) - g = g->base_graph; - - commit_data = g->chunk_commit_data + - GRAPH_DATA_WIDTH * (graph_pos - g->num_commits_in_base); - - hashcpy(oid.hash, commit_data); - set_commit_tree(c, lookup_tree(r, &oid)); - - return c->maybe_tree; -} - -static struct tree *get_commit_tree_in_graph_one(struct repository *r, - struct commit_graph *g, - const struct commit *c) -{ - if (c->maybe_tree) - return c->maybe_tree; - if (commit_graph_position(c) == COMMIT_NOT_FROM_GRAPH) - BUG("get_commit_tree_in_graph_one called from non-commit-graph commit"); - - return load_tree_for_commit(r, g, (struct commit *)c); -} - -struct tree *get_commit_tree_in_graph(struct repository *r, const struct commit *c) -{ - return get_commit_tree_in_graph_one(r, r->objects->commit_graph, c); -} - -struct packed_commit_list { - struct commit **list; - int nr; - int alloc; -}; - -struct packed_oid_list { - struct object_id *list; - int nr; - int alloc; -}; - -struct write_commit_graph_context { - struct repository *r; - struct object_directory *odb; - char *graph_name; - struct packed_oid_list oids; - struct packed_commit_list commits; - int num_extra_edges; - unsigned long approx_nr_objects; - struct progress *progress; - int progress_done; - uint64_t progress_cnt; - - char *base_graph_name; - int num_commit_graphs_before; - int num_commit_graphs_after; - char **commit_graph_filenames_before; - char **commit_graph_filenames_after; - char **commit_graph_hash_after; - uint32_t new_num_commits_in_base; - struct commit_graph *new_base_graph; - - unsigned append:1, - report_progress:1, - split:1, - changed_paths:1, - order_by_pack:1; - - const struct commit_graph_opts *opts; - size_t total_bloom_filter_data_size; - const struct bloom_filter_settings *bloom_settings; - - int count_bloom_filter_computed; - int count_bloom_filter_not_computed; - int count_bloom_filter_trunc_empty; - int count_bloom_filter_trunc_large; -}; - -static int write_graph_chunk_fanout(struct hashfile *f, - struct write_commit_graph_context *ctx) -{ - int i, count = 0; - struct commit **list = ctx->commits.list; - - /* - * Write the first-level table (the list is sorted, - * but we use a 256-entry lookup to be able to avoid - * having to do eight extra binary search iterations). - */ - for (i = 0; i < 256; i++) { - while (count < ctx->commits.nr) { - if ((*list)->object.oid.hash[0] != i) - break; - display_progress(ctx->progress, ++ctx->progress_cnt); - count++; - list++; - } - - hashwrite_be32(f, count); - } - - return 0; -} - -static int write_graph_chunk_oids(struct hashfile *f, - struct write_commit_graph_context *ctx) -{ - struct commit **list = ctx->commits.list; - int count; - for (count = 0; count < ctx->commits.nr; count++, list++) { - display_progress(ctx->progress, ++ctx->progress_cnt); - hashwrite(f, (*list)->object.oid.hash, the_hash_algo->rawsz); - } - - return 0; -} - -static const unsigned char *commit_to_sha1(size_t index, void *table) -{ - struct commit **commits = table; - return commits[index]->object.oid.hash; -} - -static int write_graph_chunk_data(struct hashfile *f, - struct write_commit_graph_context *ctx) -{ - struct commit **list = ctx->commits.list; - struct commit **last = ctx->commits.list + ctx->commits.nr; - uint32_t num_extra_edges = 0; - - while (list < last) { - struct commit_list *parent; - struct object_id *tree; - int edge_value; - uint32_t packedDate[2]; - display_progress(ctx->progress, ++ctx->progress_cnt); - - if (parse_commit_no_graph(*list)) - die(_("unable to parse commit %s"), - oid_to_hex(&(*list)->object.oid)); - tree = get_commit_tree_oid(*list); - hashwrite(f, tree->hash, the_hash_algo->rawsz); - - parent = (*list)->parents; - - if (!parent) - edge_value = GRAPH_PARENT_NONE; - else { - edge_value = sha1_pos(parent->item->object.oid.hash, - ctx->commits.list, - ctx->commits.nr, - commit_to_sha1); - - if (edge_value >= 0) - edge_value += ctx->new_num_commits_in_base; - else if (ctx->new_base_graph) { - uint32_t pos; - if (find_commit_in_graph(parent->item, - ctx->new_base_graph, - &pos)) - edge_value = pos; - } - - if (edge_value < 0) - BUG("missing parent %s for commit %s", - oid_to_hex(&parent->item->object.oid), - oid_to_hex(&(*list)->object.oid)); - } - - hashwrite_be32(f, edge_value); - - if (parent) - parent = parent->next; - - if (!parent) - edge_value = GRAPH_PARENT_NONE; - else if (parent->next) - edge_value = GRAPH_EXTRA_EDGES_NEEDED | num_extra_edges; - else { - edge_value = sha1_pos(parent->item->object.oid.hash, - ctx->commits.list, - ctx->commits.nr, - commit_to_sha1); - - if (edge_value >= 0) - edge_value += ctx->new_num_commits_in_base; - else if (ctx->new_base_graph) { - uint32_t pos; - if (find_commit_in_graph(parent->item, - ctx->new_base_graph, - &pos)) - edge_value = pos; - } - - if (edge_value < 0) - BUG("missing parent %s for commit %s", - oid_to_hex(&parent->item->object.oid), - oid_to_hex(&(*list)->object.oid)); - } - - hashwrite_be32(f, edge_value); - - if (edge_value & GRAPH_EXTRA_EDGES_NEEDED) { - do { - num_extra_edges++; - parent = parent->next; - } while (parent); - } - - if (sizeof((*list)->date) > 4) - packedDate[0] = htonl(((*list)->date >> 32) & 0x3); - else - packedDate[0] = 0; - - packedDate[0] |= htonl(commit_graph_data_at(*list)->generation << 2); - - packedDate[1] = htonl((*list)->date); - hashwrite(f, packedDate, 8); - - list++; - } - - return 0; -} - -static int write_graph_chunk_extra_edges(struct hashfile *f, - struct write_commit_graph_context *ctx) -{ - struct commit **list = ctx->commits.list; - struct commit **last = ctx->commits.list + ctx->commits.nr; - struct commit_list *parent; - - while (list < last) { - int num_parents = 0; - - display_progress(ctx->progress, ++ctx->progress_cnt); - - for (parent = (*list)->parents; num_parents < 3 && parent; - parent = parent->next) - num_parents++; - - if (num_parents <= 2) { - list++; - continue; - } - - /* Since num_parents > 2, this initializer is safe. */ - for (parent = (*list)->parents->next; parent; parent = parent->next) { - int edge_value = sha1_pos(parent->item->object.oid.hash, - ctx->commits.list, - ctx->commits.nr, - commit_to_sha1); - - if (edge_value >= 0) - edge_value += ctx->new_num_commits_in_base; - else if (ctx->new_base_graph) { - uint32_t pos; - if (find_commit_in_graph(parent->item, - ctx->new_base_graph, - &pos)) - edge_value = pos; - } - - if (edge_value < 0) - BUG("missing parent %s for commit %s", - oid_to_hex(&parent->item->object.oid), - oid_to_hex(&(*list)->object.oid)); - else if (!parent->next) - edge_value |= GRAPH_LAST_EDGE; - - hashwrite_be32(f, edge_value); - } - - list++; - } - - return 0; -} - -static int write_graph_chunk_bloom_indexes(struct hashfile *f, - struct write_commit_graph_context *ctx) -{ - struct commit **list = ctx->commits.list; - struct commit **last = ctx->commits.list + ctx->commits.nr; - uint32_t cur_pos = 0; - - while (list < last) { - struct bloom_filter *filter = get_bloom_filter(ctx->r, *list); - size_t len = filter ? filter->len : 0; - cur_pos += len; - display_progress(ctx->progress, ++ctx->progress_cnt); - hashwrite_be32(f, cur_pos); - list++; - } - - return 0; -} - -static void trace2_bloom_filter_settings(struct write_commit_graph_context *ctx) -{ - struct json_writer jw = JSON_WRITER_INIT; - - jw_object_begin(&jw, 0); - jw_object_intmax(&jw, "hash_version", ctx->bloom_settings->hash_version); - jw_object_intmax(&jw, "num_hashes", ctx->bloom_settings->num_hashes); - jw_object_intmax(&jw, "bits_per_entry", ctx->bloom_settings->bits_per_entry); - jw_object_intmax(&jw, "max_changed_paths", ctx->bloom_settings->max_changed_paths); - jw_end(&jw); - - trace2_data_json("bloom", ctx->r, "settings", &jw); - - jw_release(&jw); -} - -static int write_graph_chunk_bloom_data(struct hashfile *f, - struct write_commit_graph_context *ctx) -{ - struct commit **list = ctx->commits.list; - struct commit **last = ctx->commits.list + ctx->commits.nr; - - trace2_bloom_filter_settings(ctx); - - hashwrite_be32(f, ctx->bloom_settings->hash_version); - hashwrite_be32(f, ctx->bloom_settings->num_hashes); - hashwrite_be32(f, ctx->bloom_settings->bits_per_entry); - - while (list < last) { - struct bloom_filter *filter = get_bloom_filter(ctx->r, *list); - size_t len = filter ? filter->len : 0; - - display_progress(ctx->progress, ++ctx->progress_cnt); - if (len) - hashwrite(f, filter->data, len * sizeof(unsigned char)); - list++; - } - - return 0; -} - -static int oid_compare(const void *_a, const void *_b) -{ - const struct object_id *a = (const struct object_id *)_a; - const struct object_id *b = (const struct object_id *)_b; - return oidcmp(a, b); -} - -static int add_packed_commits(const struct object_id *oid, - struct packed_git *pack, - uint32_t pos, - void *data) -{ - struct write_commit_graph_context *ctx = (struct write_commit_graph_context*)data; - enum object_type type; - off_t offset = nth_packed_object_offset(pack, pos); - struct object_info oi = OBJECT_INFO_INIT; - - if (ctx->progress) - display_progress(ctx->progress, ++ctx->progress_done); - - oi.typep = &type; - if (packed_object_info(ctx->r, pack, offset, &oi) < 0) - die(_("unable to get type of object %s"), oid_to_hex(oid)); - - if (type != OBJ_COMMIT) - return 0; - - ALLOC_GROW(ctx->oids.list, ctx->oids.nr + 1, ctx->oids.alloc); - oidcpy(&(ctx->oids.list[ctx->oids.nr]), oid); - ctx->oids.nr++; - - set_commit_pos(ctx->r, oid); - - return 0; -} - -static void add_missing_parents(struct write_commit_graph_context *ctx, struct commit *commit) -{ - struct commit_list *parent; - for (parent = commit->parents; parent; parent = parent->next) { - if (!(parent->item->object.flags & REACHABLE)) { - ALLOC_GROW(ctx->oids.list, ctx->oids.nr + 1, ctx->oids.alloc); - oidcpy(&ctx->oids.list[ctx->oids.nr], &(parent->item->object.oid)); - ctx->oids.nr++; - parent->item->object.flags |= REACHABLE; - } - } -} - -static void close_reachable(struct write_commit_graph_context *ctx) -{ - int i; - struct commit *commit; - enum commit_graph_split_flags flags = ctx->opts ? - ctx->opts->split_flags : COMMIT_GRAPH_SPLIT_UNSPECIFIED; - - if (ctx->report_progress) - ctx->progress = start_delayed_progress( - _("Loading known commits in commit graph"), - ctx->oids.nr); - for (i = 0; i < ctx->oids.nr; i++) { - display_progress(ctx->progress, i + 1); - commit = lookup_commit(ctx->r, &ctx->oids.list[i]); - if (commit) - commit->object.flags |= REACHABLE; - } - stop_progress(&ctx->progress); - - /* - * As this loop runs, ctx->oids.nr may grow, but not more - * than the number of missing commits in the reachable - * closure. - */ - if (ctx->report_progress) - ctx->progress = start_delayed_progress( - _("Expanding reachable commits in commit graph"), - 0); - for (i = 0; i < ctx->oids.nr; i++) { - display_progress(ctx->progress, i + 1); - commit = lookup_commit(ctx->r, &ctx->oids.list[i]); - - if (!commit) - continue; - if (ctx->split) { - if ((!parse_commit(commit) && - commit_graph_position(commit) == COMMIT_NOT_FROM_GRAPH) || - flags == COMMIT_GRAPH_SPLIT_REPLACE) - add_missing_parents(ctx, commit); - } else if (!parse_commit_no_graph(commit)) - add_missing_parents(ctx, commit); - } - stop_progress(&ctx->progress); - - if (ctx->report_progress) - ctx->progress = start_delayed_progress( - _("Clearing commit marks in commit graph"), - ctx->oids.nr); - for (i = 0; i < ctx->oids.nr; i++) { - display_progress(ctx->progress, i + 1); - commit = lookup_commit(ctx->r, &ctx->oids.list[i]); - - if (commit) - commit->object.flags &= ~REACHABLE; - } - stop_progress(&ctx->progress); -} - -static void compute_generation_numbers(struct write_commit_graph_context *ctx) -{ - int i; - struct commit_list *list = NULL; - - if (ctx->report_progress) - ctx->progress = start_delayed_progress( - _("Computing commit graph generation numbers"), - ctx->commits.nr); - for (i = 0; i < ctx->commits.nr; i++) { - uint32_t generation = commit_graph_data_at(ctx->commits.list[i])->generation; - - display_progress(ctx->progress, i + 1); - if (generation != GENERATION_NUMBER_INFINITY && - generation != GENERATION_NUMBER_ZERO) - continue; - - commit_list_insert(ctx->commits.list[i], &list); - while (list) { - struct commit *current = list->item; - struct commit_list *parent; - int all_parents_computed = 1; - uint32_t max_generation = 0; - - for (parent = current->parents; parent; parent = parent->next) { - generation = commit_graph_data_at(parent->item)->generation; - - if (generation == GENERATION_NUMBER_INFINITY || - generation == GENERATION_NUMBER_ZERO) { - all_parents_computed = 0; - commit_list_insert(parent->item, &list); - break; - } else if (generation > max_generation) { - max_generation = generation; - } - } - - if (all_parents_computed) { - struct commit_graph_data *data = commit_graph_data_at(current); - - data->generation = max_generation + 1; - pop_commit(&list); - - if (data->generation > GENERATION_NUMBER_MAX) - data->generation = GENERATION_NUMBER_MAX; - } - } - } - stop_progress(&ctx->progress); -} - -static void trace2_bloom_filter_write_statistics(struct write_commit_graph_context *ctx) -{ - trace2_data_intmax("commit-graph", ctx->r, "filter-computed", - ctx->count_bloom_filter_computed); - trace2_data_intmax("commit-graph", ctx->r, "filter-not-computed", - ctx->count_bloom_filter_not_computed); - trace2_data_intmax("commit-graph", ctx->r, "filter-trunc-empty", - ctx->count_bloom_filter_trunc_empty); - trace2_data_intmax("commit-graph", ctx->r, "filter-trunc-large", - ctx->count_bloom_filter_trunc_large); -} - -static void compute_bloom_filters(struct write_commit_graph_context *ctx) -{ - int i; - struct progress *progress = NULL; - struct commit **sorted_commits; - int max_new_filters; - - init_bloom_filters(); - - if (ctx->report_progress) - progress = start_delayed_progress( - _("Computing commit changed paths Bloom filters"), - ctx->commits.nr); - - ALLOC_ARRAY(sorted_commits, ctx->commits.nr); - COPY_ARRAY(sorted_commits, ctx->commits.list, ctx->commits.nr); - - if (ctx->order_by_pack) - QSORT(sorted_commits, ctx->commits.nr, commit_pos_cmp); - else - QSORT(sorted_commits, ctx->commits.nr, commit_gen_cmp); - - max_new_filters = ctx->opts && ctx->opts->max_new_filters >= 0 ? - ctx->opts->max_new_filters : ctx->commits.nr; - - for (i = 0; i < ctx->commits.nr; i++) { - enum bloom_filter_computed computed = 0; - struct commit *c = sorted_commits[i]; - struct bloom_filter *filter = get_or_compute_bloom_filter( - ctx->r, - c, - ctx->count_bloom_filter_computed < max_new_filters, - ctx->bloom_settings, - &computed); - if (computed & BLOOM_COMPUTED) { - ctx->count_bloom_filter_computed++; - if (computed & BLOOM_TRUNC_EMPTY) - ctx->count_bloom_filter_trunc_empty++; - if (computed & BLOOM_TRUNC_LARGE) - ctx->count_bloom_filter_trunc_large++; - } else if (computed & BLOOM_NOT_COMPUTED) - ctx->count_bloom_filter_not_computed++; - ctx->total_bloom_filter_data_size += filter - ? sizeof(unsigned char) * filter->len : 0; - display_progress(progress, i + 1); - } - - if (trace2_is_enabled()) - trace2_bloom_filter_write_statistics(ctx); - - free(sorted_commits); - stop_progress(&progress); -} - -struct refs_cb_data { - struct oidset *commits; - struct progress *progress; -}; - -static int add_ref_to_set(const char *refname, - const struct object_id *oid, - int flags, void *cb_data) -{ - struct object_id peeled; - struct refs_cb_data *data = (struct refs_cb_data *)cb_data; - - if (!peel_ref(refname, &peeled)) - oid = &peeled; - if (oid_object_info(the_repository, oid, NULL) == OBJ_COMMIT) - oidset_insert(data->commits, oid); - - display_progress(data->progress, oidset_size(data->commits)); - - return 0; -} - -int write_commit_graph_reachable(struct object_directory *odb, - enum commit_graph_write_flags flags, - const struct commit_graph_opts *opts) -{ - struct oidset commits = OIDSET_INIT; - struct refs_cb_data data; - int result; - - memset(&data, 0, sizeof(data)); - data.commits = &commits; - if (flags & COMMIT_GRAPH_WRITE_PROGRESS) - data.progress = start_delayed_progress( - _("Collecting referenced commits"), 0); - - for_each_ref(add_ref_to_set, &data); - - stop_progress(&data.progress); - - result = write_commit_graph(odb, NULL, &commits, - flags, opts); - - oidset_clear(&commits); - return result; -} - -static int fill_oids_from_packs(struct write_commit_graph_context *ctx, - struct string_list *pack_indexes) -{ - uint32_t i; - struct strbuf progress_title = STRBUF_INIT; - struct strbuf packname = STRBUF_INIT; - int dirlen; - - strbuf_addf(&packname, "%s/pack/", ctx->odb->path); - dirlen = packname.len; - if (ctx->report_progress) { - strbuf_addf(&progress_title, - Q_("Finding commits for commit graph in %d pack", - "Finding commits for commit graph in %d packs", - pack_indexes->nr), - pack_indexes->nr); - ctx->progress = start_delayed_progress(progress_title.buf, 0); - ctx->progress_done = 0; - } - for (i = 0; i < pack_indexes->nr; i++) { - struct packed_git *p; - strbuf_setlen(&packname, dirlen); - strbuf_addstr(&packname, pack_indexes->items[i].string); - p = add_packed_git(packname.buf, packname.len, 1); - if (!p) { - error(_("error adding pack %s"), packname.buf); - return -1; - } - if (open_pack_index(p)) { - error(_("error opening index for %s"), packname.buf); - return -1; - } - for_each_object_in_pack(p, add_packed_commits, ctx, - FOR_EACH_OBJECT_PACK_ORDER); - close_pack(p); - free(p); - } - - stop_progress(&ctx->progress); - strbuf_release(&progress_title); - strbuf_release(&packname); - - return 0; -} - -static int fill_oids_from_commits(struct write_commit_graph_context *ctx, - struct oidset *commits) -{ - struct oidset_iter iter; - struct object_id *oid; - - if (!oidset_size(commits)) - return 0; - - oidset_iter_init(commits, &iter); - while ((oid = oidset_iter_next(&iter))) { - ALLOC_GROW(ctx->oids.list, ctx->oids.nr + 1, ctx->oids.alloc); - oidcpy(&ctx->oids.list[ctx->oids.nr], oid); - ctx->oids.nr++; - } - - return 0; -} - -static void fill_oids_from_all_packs(struct write_commit_graph_context *ctx) -{ - if (ctx->report_progress) - ctx->progress = start_delayed_progress( - _("Finding commits for commit graph among packed objects"), - ctx->approx_nr_objects); - for_each_packed_object(add_packed_commits, ctx, - FOR_EACH_OBJECT_PACK_ORDER); - if (ctx->progress_done < ctx->approx_nr_objects) - display_progress(ctx->progress, ctx->approx_nr_objects); - stop_progress(&ctx->progress); -} - -static uint32_t count_distinct_commits(struct write_commit_graph_context *ctx) -{ - uint32_t i, count_distinct = 1; - - if (ctx->report_progress) - ctx->progress = start_delayed_progress( - _("Counting distinct commits in commit graph"), - ctx->oids.nr); - display_progress(ctx->progress, 0); /* TODO: Measure QSORT() progress */ - QSORT(ctx->oids.list, ctx->oids.nr, oid_compare); - - for (i = 1; i < ctx->oids.nr; i++) { - display_progress(ctx->progress, i + 1); - if (!oideq(&ctx->oids.list[i - 1], &ctx->oids.list[i])) { - if (ctx->split) { - struct commit *c = lookup_commit(ctx->r, &ctx->oids.list[i]); - - if (!c || commit_graph_position(c) != COMMIT_NOT_FROM_GRAPH) - continue; - } - - count_distinct++; - } - } - stop_progress(&ctx->progress); - - return count_distinct; -} - -static void copy_oids_to_commits(struct write_commit_graph_context *ctx) -{ - uint32_t i; - enum commit_graph_split_flags flags = ctx->opts ? - ctx->opts->split_flags : COMMIT_GRAPH_SPLIT_UNSPECIFIED; - - ctx->num_extra_edges = 0; - if (ctx->report_progress) - ctx->progress = start_delayed_progress( - _("Finding extra edges in commit graph"), - ctx->oids.nr); - for (i = 0; i < ctx->oids.nr; i++) { - unsigned int num_parents; - - display_progress(ctx->progress, i + 1); - if (i > 0 && oideq(&ctx->oids.list[i - 1], &ctx->oids.list[i])) - continue; - - ALLOC_GROW(ctx->commits.list, ctx->commits.nr + 1, ctx->commits.alloc); - ctx->commits.list[ctx->commits.nr] = lookup_commit(ctx->r, &ctx->oids.list[i]); - - if (ctx->split && flags != COMMIT_GRAPH_SPLIT_REPLACE && - commit_graph_position(ctx->commits.list[ctx->commits.nr]) != COMMIT_NOT_FROM_GRAPH) - continue; - - if (ctx->split && flags == COMMIT_GRAPH_SPLIT_REPLACE) - parse_commit(ctx->commits.list[ctx->commits.nr]); - else - parse_commit_no_graph(ctx->commits.list[ctx->commits.nr]); - - num_parents = commit_list_count(ctx->commits.list[ctx->commits.nr]->parents); - if (num_parents > 2) - ctx->num_extra_edges += num_parents - 1; - - ctx->commits.nr++; - } - stop_progress(&ctx->progress); -} - -static int write_graph_chunk_base_1(struct hashfile *f, - struct commit_graph *g) -{ - int num = 0; - - if (!g) - return 0; - - num = write_graph_chunk_base_1(f, g->base_graph); - hashwrite(f, g->oid.hash, the_hash_algo->rawsz); - return num + 1; -} - -static int write_graph_chunk_base(struct hashfile *f, - struct write_commit_graph_context *ctx) -{ - int num = write_graph_chunk_base_1(f, ctx->new_base_graph); - - if (num != ctx->num_commit_graphs_after - 1) { - error(_("failed to write correct number of base graph ids")); - return -1; - } - - return 0; -} - -typedef int (*chunk_write_fn)(struct hashfile *f, - struct write_commit_graph_context *ctx); - -struct chunk_info { - uint32_t id; - uint64_t size; - chunk_write_fn write_fn; -}; - -static int write_commit_graph_file(struct write_commit_graph_context *ctx) -{ - uint32_t i; - int fd; - struct hashfile *f; - struct lock_file lk = LOCK_INIT; - struct chunk_info chunks[MAX_NUM_CHUNKS + 1]; - const unsigned hashsz = the_hash_algo->rawsz; - struct strbuf progress_title = STRBUF_INIT; - int num_chunks = 3; - uint64_t chunk_offset; - struct object_id file_hash; - - if (ctx->split) { - struct strbuf tmp_file = STRBUF_INIT; - - strbuf_addf(&tmp_file, - "%s/info/commit-graphs/tmp_graph_XXXXXX", - ctx->odb->path); - ctx->graph_name = strbuf_detach(&tmp_file, NULL); - } else { - ctx->graph_name = get_commit_graph_filename(ctx->odb); - } - - if (safe_create_leading_directories(ctx->graph_name)) { - UNLEAK(ctx->graph_name); - error(_("unable to create leading directories of %s"), - ctx->graph_name); - return -1; - } - - if (ctx->split) { - char *lock_name = get_commit_graph_chain_filename(ctx->odb); - - hold_lock_file_for_update_mode(&lk, lock_name, - LOCK_DIE_ON_ERROR, 0444); - - fd = git_mkstemp_mode(ctx->graph_name, 0444); - if (fd < 0) { - error(_("unable to create temporary graph layer")); - return -1; - } - - if (adjust_shared_perm(ctx->graph_name)) { - error(_("unable to adjust shared permissions for '%s'"), - ctx->graph_name); - return -1; - } - - f = hashfd(fd, ctx->graph_name); - } else { - hold_lock_file_for_update_mode(&lk, ctx->graph_name, - LOCK_DIE_ON_ERROR, 0444); - fd = lk.tempfile->fd; - f = hashfd(lk.tempfile->fd, lk.tempfile->filename.buf); - } - - chunks[0].id = GRAPH_CHUNKID_OIDFANOUT; - chunks[0].size = GRAPH_FANOUT_SIZE; - chunks[0].write_fn = write_graph_chunk_fanout; - chunks[1].id = GRAPH_CHUNKID_OIDLOOKUP; - chunks[1].size = hashsz * ctx->commits.nr; - chunks[1].write_fn = write_graph_chunk_oids; - chunks[2].id = GRAPH_CHUNKID_DATA; - chunks[2].size = (hashsz + 16) * ctx->commits.nr; - chunks[2].write_fn = write_graph_chunk_data; - if (ctx->num_extra_edges) { - chunks[num_chunks].id = GRAPH_CHUNKID_EXTRAEDGES; - chunks[num_chunks].size = 4 * ctx->num_extra_edges; - chunks[num_chunks].write_fn = write_graph_chunk_extra_edges; - num_chunks++; - } - if (ctx->changed_paths) { - chunks[num_chunks].id = GRAPH_CHUNKID_BLOOMINDEXES; - chunks[num_chunks].size = sizeof(uint32_t) * ctx->commits.nr; - chunks[num_chunks].write_fn = write_graph_chunk_bloom_indexes; - num_chunks++; - chunks[num_chunks].id = GRAPH_CHUNKID_BLOOMDATA; - chunks[num_chunks].size = sizeof(uint32_t) * 3 - + ctx->total_bloom_filter_data_size; - chunks[num_chunks].write_fn = write_graph_chunk_bloom_data; - num_chunks++; - } - if (ctx->num_commit_graphs_after > 1) { - chunks[num_chunks].id = GRAPH_CHUNKID_BASE; - chunks[num_chunks].size = hashsz * (ctx->num_commit_graphs_after - 1); - chunks[num_chunks].write_fn = write_graph_chunk_base; - num_chunks++; - } - - chunks[num_chunks].id = 0; - chunks[num_chunks].size = 0; - - hashwrite_be32(f, GRAPH_SIGNATURE); - - hashwrite_u8(f, GRAPH_VERSION); - hashwrite_u8(f, oid_version()); - hashwrite_u8(f, num_chunks); - hashwrite_u8(f, ctx->num_commit_graphs_after - 1); - - chunk_offset = 8 + (num_chunks + 1) * GRAPH_CHUNKLOOKUP_WIDTH; - for (i = 0; i <= num_chunks; i++) { - uint32_t chunk_write[3]; - - chunk_write[0] = htonl(chunks[i].id); - chunk_write[1] = htonl(chunk_offset >> 32); - chunk_write[2] = htonl(chunk_offset & 0xffffffff); - hashwrite(f, chunk_write, 12); - - chunk_offset += chunks[i].size; - } - - if (ctx->report_progress) { - strbuf_addf(&progress_title, - Q_("Writing out commit graph in %d pass", - "Writing out commit graph in %d passes", - num_chunks), - num_chunks); - ctx->progress = start_delayed_progress( - progress_title.buf, - num_chunks * ctx->commits.nr); - } - - for (i = 0; i < num_chunks; i++) { - uint64_t start_offset = f->total + f->offset; - - if (chunks[i].write_fn(f, ctx)) - return -1; - - if (f->total + f->offset != start_offset + chunks[i].size) - BUG("expected to write %"PRId64" bytes to chunk %"PRIx32", but wrote %"PRId64" instead", - chunks[i].size, chunks[i].id, - f->total + f->offset - start_offset); - } - - stop_progress(&ctx->progress); - strbuf_release(&progress_title); - - if (ctx->split && ctx->base_graph_name && ctx->num_commit_graphs_after > 1) { - char *new_base_hash = xstrdup(oid_to_hex(&ctx->new_base_graph->oid)); - char *new_base_name = get_split_graph_filename(ctx->new_base_graph->odb, new_base_hash); - - free(ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 2]); - free(ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 2]); - ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 2] = new_base_name; - ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 2] = new_base_hash; - } - - close_commit_graph(ctx->r->objects); - finalize_hashfile(f, file_hash.hash, CSUM_HASH_IN_STREAM | CSUM_FSYNC); - - if (ctx->split) { - FILE *chainf = fdopen_lock_file(&lk, "w"); - char *final_graph_name; - int result; - - close(fd); - - if (!chainf) { - error(_("unable to open commit-graph chain file")); - return -1; - } - - if (ctx->base_graph_name) { - const char *dest; - int idx = ctx->num_commit_graphs_after - 1; - if (ctx->num_commit_graphs_after > 1) - idx--; - - dest = ctx->commit_graph_filenames_after[idx]; - - if (strcmp(ctx->base_graph_name, dest)) { - result = rename(ctx->base_graph_name, dest); - - if (result) { - error(_("failed to rename base commit-graph file")); - return -1; - } - } - } else { - char *graph_name = get_commit_graph_filename(ctx->odb); - unlink(graph_name); - } - - ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 1] = xstrdup(oid_to_hex(&file_hash)); - final_graph_name = get_split_graph_filename(ctx->odb, - ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 1]); - ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 1] = final_graph_name; - - result = rename(ctx->graph_name, final_graph_name); - - for (i = 0; i < ctx->num_commit_graphs_after; i++) - fprintf(lk.tempfile->fp, "%s\n", ctx->commit_graph_hash_after[i]); - - if (result) { - error(_("failed to rename temporary commit-graph file")); - return -1; - } - } - - commit_lock_file(&lk); - - return 0; -} - -static void split_graph_merge_strategy(struct write_commit_graph_context *ctx) -{ - struct commit_graph *g; - uint32_t num_commits; - enum commit_graph_split_flags flags = COMMIT_GRAPH_SPLIT_UNSPECIFIED; - uint32_t i; - - int max_commits = 0; - int size_mult = 2; - - if (ctx->opts) { - max_commits = ctx->opts->max_commits; - - if (ctx->opts->size_multiple) - size_mult = ctx->opts->size_multiple; - - flags = ctx->opts->split_flags; - } - - g = ctx->r->objects->commit_graph; - num_commits = ctx->commits.nr; - if (flags == COMMIT_GRAPH_SPLIT_REPLACE) - ctx->num_commit_graphs_after = 1; - else - ctx->num_commit_graphs_after = ctx->num_commit_graphs_before + 1; - - if (flags != COMMIT_GRAPH_SPLIT_MERGE_PROHIBITED && - flags != COMMIT_GRAPH_SPLIT_REPLACE) { - while (g && (g->num_commits <= size_mult * num_commits || - (max_commits && num_commits > max_commits))) { - if (g->odb != ctx->odb) - break; - - num_commits += g->num_commits; - g = g->base_graph; - - ctx->num_commit_graphs_after--; - } - } - - if (flags != COMMIT_GRAPH_SPLIT_REPLACE) - ctx->new_base_graph = g; - else if (ctx->num_commit_graphs_after != 1) - BUG("split_graph_merge_strategy: num_commit_graphs_after " - "should be 1 with --split=replace"); - - if (ctx->num_commit_graphs_after == 2) { - char *old_graph_name = get_commit_graph_filename(g->odb); - - if (!strcmp(g->filename, old_graph_name) && - g->odb != ctx->odb) { - ctx->num_commit_graphs_after = 1; - ctx->new_base_graph = NULL; - } - - free(old_graph_name); - } - - CALLOC_ARRAY(ctx->commit_graph_filenames_after, ctx->num_commit_graphs_after); - CALLOC_ARRAY(ctx->commit_graph_hash_after, ctx->num_commit_graphs_after); - - for (i = 0; i < ctx->num_commit_graphs_after && - i < ctx->num_commit_graphs_before; i++) - ctx->commit_graph_filenames_after[i] = xstrdup(ctx->commit_graph_filenames_before[i]); - - i = ctx->num_commit_graphs_before - 1; - g = ctx->r->objects->commit_graph; - - while (g) { - if (i < ctx->num_commit_graphs_after) - ctx->commit_graph_hash_after[i] = xstrdup(oid_to_hex(&g->oid)); - - i--; - g = g->base_graph; - } -} - -static void merge_commit_graph(struct write_commit_graph_context *ctx, - struct commit_graph *g) -{ - uint32_t i; - uint32_t offset = g->num_commits_in_base; - - ALLOC_GROW(ctx->commits.list, ctx->commits.nr + g->num_commits, ctx->commits.alloc); - - for (i = 0; i < g->num_commits; i++) { - struct object_id oid; - struct commit *result; - - display_progress(ctx->progress, i + 1); - - load_oid_from_graph(g, i + offset, &oid); - - /* only add commits if they still exist in the repo */ - result = lookup_commit_reference_gently(ctx->r, &oid, 1); - - if (result) { - ctx->commits.list[ctx->commits.nr] = result; - ctx->commits.nr++; - } - } -} - -static int commit_compare(const void *_a, const void *_b) -{ - const struct commit *a = *(const struct commit **)_a; - const struct commit *b = *(const struct commit **)_b; - return oidcmp(&a->object.oid, &b->object.oid); -} - -static void sort_and_scan_merged_commits(struct write_commit_graph_context *ctx) -{ - uint32_t i; - - if (ctx->report_progress) - ctx->progress = start_delayed_progress( - _("Scanning merged commits"), - ctx->commits.nr); - - QSORT(ctx->commits.list, ctx->commits.nr, commit_compare); - - ctx->num_extra_edges = 0; - for (i = 0; i < ctx->commits.nr; i++) { - display_progress(ctx->progress, i); - - if (i && oideq(&ctx->commits.list[i - 1]->object.oid, - &ctx->commits.list[i]->object.oid)) { - die(_("unexpected duplicate commit id %s"), - oid_to_hex(&ctx->commits.list[i]->object.oid)); - } else { - unsigned int num_parents; - - num_parents = commit_list_count(ctx->commits.list[i]->parents); - if (num_parents > 2) - ctx->num_extra_edges += num_parents - 1; - } - } - - stop_progress(&ctx->progress); -} - -static void merge_commit_graphs(struct write_commit_graph_context *ctx) -{ - struct commit_graph *g = ctx->r->objects->commit_graph; - uint32_t current_graph_number = ctx->num_commit_graphs_before; - - while (g && current_graph_number >= ctx->num_commit_graphs_after) { - current_graph_number--; - - if (ctx->report_progress) - ctx->progress = start_delayed_progress(_("Merging commit-graph"), 0); - - merge_commit_graph(ctx, g); - stop_progress(&ctx->progress); - - g = g->base_graph; - } - - if (g) { - ctx->new_base_graph = g; - ctx->new_num_commits_in_base = g->num_commits + g->num_commits_in_base; - } - - if (ctx->new_base_graph) - ctx->base_graph_name = xstrdup(ctx->new_base_graph->filename); - - sort_and_scan_merged_commits(ctx); -} - -static void mark_commit_graphs(struct write_commit_graph_context *ctx) -{ - uint32_t i; - time_t now = time(NULL); - - for (i = ctx->num_commit_graphs_after - 1; i < ctx->num_commit_graphs_before; i++) { - struct stat st; - struct utimbuf updated_time; - - stat(ctx->commit_graph_filenames_before[i], &st); - - updated_time.actime = st.st_atime; - updated_time.modtime = now; - utime(ctx->commit_graph_filenames_before[i], &updated_time); - } -} - -static void expire_commit_graphs(struct write_commit_graph_context *ctx) -{ - struct strbuf path = STRBUF_INIT; - DIR *dir; - struct dirent *de; - size_t dirnamelen; - timestamp_t expire_time = time(NULL); - - if (ctx->opts && ctx->opts->expire_time) - expire_time = ctx->opts->expire_time; - if (!ctx->split) { - char *chain_file_name = get_commit_graph_chain_filename(ctx->odb); - unlink(chain_file_name); - free(chain_file_name); - ctx->num_commit_graphs_after = 0; - } - - strbuf_addstr(&path, ctx->odb->path); - strbuf_addstr(&path, "/info/commit-graphs"); - dir = opendir(path.buf); - - if (!dir) - goto out; - - strbuf_addch(&path, '/'); - dirnamelen = path.len; - while ((de = readdir(dir)) != NULL) { - struct stat st; - uint32_t i, found = 0; - - strbuf_setlen(&path, dirnamelen); - strbuf_addstr(&path, de->d_name); - - stat(path.buf, &st); - - if (st.st_mtime > expire_time) - continue; - if (path.len < 6 || strcmp(path.buf + path.len - 6, ".graph")) - continue; - - for (i = 0; i < ctx->num_commit_graphs_after; i++) { - if (!strcmp(ctx->commit_graph_filenames_after[i], - path.buf)) { - found = 1; - break; - } - } - - if (!found) - unlink(path.buf); - } - -out: - strbuf_release(&path); -} - -int write_commit_graph(struct object_directory *odb, - struct string_list *pack_indexes, - struct oidset *commits, - enum commit_graph_write_flags flags, - const struct commit_graph_opts *opts) -{ - struct write_commit_graph_context *ctx; - uint32_t i, count_distinct = 0; - int res = 0; - int replace = 0; - struct bloom_filter_settings bloom_settings = DEFAULT_BLOOM_FILTER_SETTINGS; - - if (!commit_graph_compatible(the_repository)) - return 0; - - ctx = xcalloc(1, sizeof(struct write_commit_graph_context)); - ctx->r = the_repository; - ctx->odb = odb; - ctx->append = flags & COMMIT_GRAPH_WRITE_APPEND ? 1 : 0; - ctx->report_progress = flags & COMMIT_GRAPH_WRITE_PROGRESS ? 1 : 0; - ctx->split = flags & COMMIT_GRAPH_WRITE_SPLIT ? 1 : 0; - ctx->opts = opts; - ctx->total_bloom_filter_data_size = 0; - - bloom_settings.bits_per_entry = git_env_ulong("GIT_TEST_BLOOM_SETTINGS_BITS_PER_ENTRY", - bloom_settings.bits_per_entry); - bloom_settings.num_hashes = git_env_ulong("GIT_TEST_BLOOM_SETTINGS_NUM_HASHES", - bloom_settings.num_hashes); - bloom_settings.max_changed_paths = git_env_ulong("GIT_TEST_BLOOM_SETTINGS_MAX_CHANGED_PATHS", - bloom_settings.max_changed_paths); - ctx->bloom_settings = &bloom_settings; - - if (flags & COMMIT_GRAPH_WRITE_BLOOM_FILTERS) - ctx->changed_paths = 1; - if (!(flags & COMMIT_GRAPH_NO_WRITE_BLOOM_FILTERS)) { - struct commit_graph *g; - prepare_commit_graph_one(ctx->r, ctx->odb); - - g = ctx->r->objects->commit_graph; - - /* We have changed-paths already. Keep them in the next graph */ - if (g && g->chunk_bloom_data) { - ctx->changed_paths = 1; - ctx->bloom_settings = g->bloom_filter_settings; - } - } - - if (ctx->split) { - struct commit_graph *g; - prepare_commit_graph(ctx->r); - - g = ctx->r->objects->commit_graph; - - while (g) { - ctx->num_commit_graphs_before++; - g = g->base_graph; - } - - if (ctx->num_commit_graphs_before) { - ALLOC_ARRAY(ctx->commit_graph_filenames_before, ctx->num_commit_graphs_before); - i = ctx->num_commit_graphs_before; - g = ctx->r->objects->commit_graph; - - while (g) { - ctx->commit_graph_filenames_before[--i] = xstrdup(g->filename); - g = g->base_graph; - } - } - - if (ctx->opts) - replace = ctx->opts->split_flags & COMMIT_GRAPH_SPLIT_REPLACE; - } - - ctx->approx_nr_objects = approximate_object_count(); - ctx->oids.alloc = ctx->approx_nr_objects / 32; - - if (ctx->split && opts && ctx->oids.alloc > opts->max_commits) - ctx->oids.alloc = opts->max_commits; - - if (ctx->append) { - prepare_commit_graph_one(ctx->r, ctx->odb); - if (ctx->r->objects->commit_graph) - ctx->oids.alloc += ctx->r->objects->commit_graph->num_commits; - } - - if (ctx->oids.alloc < 1024) - ctx->oids.alloc = 1024; - ALLOC_ARRAY(ctx->oids.list, ctx->oids.alloc); - - if (ctx->append && ctx->r->objects->commit_graph) { - struct commit_graph *g = ctx->r->objects->commit_graph; - for (i = 0; i < g->num_commits; i++) { - const unsigned char *hash = g->chunk_oid_lookup + g->hash_len * i; - hashcpy(ctx->oids.list[ctx->oids.nr++].hash, hash); - } - } - - if (pack_indexes) { - ctx->order_by_pack = 1; - if ((res = fill_oids_from_packs(ctx, pack_indexes))) - goto cleanup; - } - - if (commits) { - if ((res = fill_oids_from_commits(ctx, commits))) - goto cleanup; - } - - if (!pack_indexes && !commits) { - ctx->order_by_pack = 1; - fill_oids_from_all_packs(ctx); - } - - close_reachable(ctx); - - count_distinct = count_distinct_commits(ctx); - - if (count_distinct >= GRAPH_EDGE_LAST_MASK) { - error(_("the commit graph format cannot write %d commits"), count_distinct); - res = -1; - goto cleanup; - } - - ctx->commits.alloc = count_distinct; - ALLOC_ARRAY(ctx->commits.list, ctx->commits.alloc); - - copy_oids_to_commits(ctx); - - if (ctx->commits.nr >= GRAPH_EDGE_LAST_MASK) { - error(_("too many commits to write graph")); - res = -1; - goto cleanup; - } - - if (!ctx->commits.nr && !replace) - goto cleanup; - - if (ctx->split) { - split_graph_merge_strategy(ctx); - - if (!replace) - merge_commit_graphs(ctx); - } else - ctx->num_commit_graphs_after = 1; - - compute_generation_numbers(ctx); - - if (ctx->changed_paths) - compute_bloom_filters(ctx); - - res = write_commit_graph_file(ctx); - - if (ctx->split) - mark_commit_graphs(ctx); - - expire_commit_graphs(ctx); - -cleanup: - free(ctx->graph_name); - free(ctx->commits.list); - free(ctx->oids.list); - - if (ctx->commit_graph_filenames_after) { - for (i = 0; i < ctx->num_commit_graphs_after; i++) { - free(ctx->commit_graph_filenames_after[i]); - free(ctx->commit_graph_hash_after[i]); - } - - for (i = 0; i < ctx->num_commit_graphs_before; i++) - free(ctx->commit_graph_filenames_before[i]); - - free(ctx->commit_graph_filenames_after); - free(ctx->commit_graph_filenames_before); - free(ctx->commit_graph_hash_after); - } - - free(ctx); - - return res; -} - -#define VERIFY_COMMIT_GRAPH_ERROR_HASH 2 -static int verify_commit_graph_error; - -static void graph_report(const char *fmt, ...) -{ - va_list ap; - - verify_commit_graph_error = 1; - va_start(ap, fmt); - vfprintf(stderr, fmt, ap); - fprintf(stderr, "\n"); - va_end(ap); -} - -#define GENERATION_ZERO_EXISTS 1 -#define GENERATION_NUMBER_EXISTS 2 - -int verify_commit_graph(struct repository *r, struct commit_graph *g, int flags) -{ - uint32_t i, cur_fanout_pos = 0; - struct object_id prev_oid, cur_oid, checksum; - int generation_zero = 0; - struct hashfile *f; - int devnull; - struct progress *progress = NULL; - int local_error = 0; - - if (!g) { - graph_report("no commit-graph file loaded"); - return 1; - } - - verify_commit_graph_error = verify_commit_graph_lite(g); - if (verify_commit_graph_error) - return verify_commit_graph_error; - - devnull = open("/dev/null", O_WRONLY); - f = hashfd(devnull, NULL); - hashwrite(f, g->data, g->data_len - g->hash_len); - finalize_hashfile(f, checksum.hash, CSUM_CLOSE); - if (!hasheq(checksum.hash, g->data + g->data_len - g->hash_len)) { - graph_report(_("the commit-graph file has incorrect checksum and is likely corrupt")); - verify_commit_graph_error = VERIFY_COMMIT_GRAPH_ERROR_HASH; - } - - for (i = 0; i < g->num_commits; i++) { - struct commit *graph_commit; - - hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i); - - if (i && oidcmp(&prev_oid, &cur_oid) >= 0) - graph_report(_("commit-graph has incorrect OID order: %s then %s"), - oid_to_hex(&prev_oid), - oid_to_hex(&cur_oid)); - - oidcpy(&prev_oid, &cur_oid); - - while (cur_oid.hash[0] > cur_fanout_pos) { - uint32_t fanout_value = get_be32(g->chunk_oid_fanout + cur_fanout_pos); - - if (i != fanout_value) - graph_report(_("commit-graph has incorrect fanout value: fanout[%d] = %u != %u"), - cur_fanout_pos, fanout_value, i); - cur_fanout_pos++; - } - - graph_commit = lookup_commit(r, &cur_oid); - if (!parse_commit_in_graph_one(r, g, graph_commit)) - graph_report(_("failed to parse commit %s from commit-graph"), - oid_to_hex(&cur_oid)); - } - - while (cur_fanout_pos < 256) { - uint32_t fanout_value = get_be32(g->chunk_oid_fanout + cur_fanout_pos); - - if (g->num_commits != fanout_value) - graph_report(_("commit-graph has incorrect fanout value: fanout[%d] = %u != %u"), - cur_fanout_pos, fanout_value, i); - - cur_fanout_pos++; - } - - if (verify_commit_graph_error & ~VERIFY_COMMIT_GRAPH_ERROR_HASH) - return verify_commit_graph_error; - - if (flags & COMMIT_GRAPH_WRITE_PROGRESS) - progress = start_progress(_("Verifying commits in commit graph"), - g->num_commits); - - for (i = 0; i < g->num_commits; i++) { - struct commit *graph_commit, *odb_commit; - struct commit_list *graph_parents, *odb_parents; - uint32_t max_generation = 0; - uint32_t generation; - - display_progress(progress, i + 1); - hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i); - - graph_commit = lookup_commit(r, &cur_oid); - odb_commit = (struct commit *)create_object(r, &cur_oid, alloc_commit_node(r)); - if (parse_commit_internal(odb_commit, 0, 0)) { - graph_report(_("failed to parse commit %s from object database for commit-graph"), - oid_to_hex(&cur_oid)); - continue; - } - - if (!oideq(&get_commit_tree_in_graph_one(r, g, graph_commit)->object.oid, - get_commit_tree_oid(odb_commit))) - graph_report(_("root tree OID for commit %s in commit-graph is %s != %s"), - oid_to_hex(&cur_oid), - oid_to_hex(get_commit_tree_oid(graph_commit)), - oid_to_hex(get_commit_tree_oid(odb_commit))); - - graph_parents = graph_commit->parents; - odb_parents = odb_commit->parents; - - while (graph_parents) { - if (odb_parents == NULL) { - graph_report(_("commit-graph parent list for commit %s is too long"), - oid_to_hex(&cur_oid)); - break; - } - - /* parse parent in case it is in a base graph */ - parse_commit_in_graph_one(r, g, graph_parents->item); - - if (!oideq(&graph_parents->item->object.oid, &odb_parents->item->object.oid)) - graph_report(_("commit-graph parent for %s is %s != %s"), - oid_to_hex(&cur_oid), - oid_to_hex(&graph_parents->item->object.oid), - oid_to_hex(&odb_parents->item->object.oid)); - - generation = commit_graph_generation(graph_parents->item); - if (generation > max_generation) - max_generation = generation; - - graph_parents = graph_parents->next; - odb_parents = odb_parents->next; - } - - if (odb_parents != NULL) - graph_report(_("commit-graph parent list for commit %s terminates early"), - oid_to_hex(&cur_oid)); - - if (!commit_graph_generation(graph_commit)) { - if (generation_zero == GENERATION_NUMBER_EXISTS) - graph_report(_("commit-graph has generation number zero for commit %s, but non-zero elsewhere"), - oid_to_hex(&cur_oid)); - generation_zero = GENERATION_ZERO_EXISTS; - } else if (generation_zero == GENERATION_ZERO_EXISTS) - graph_report(_("commit-graph has non-zero generation number for commit %s, but zero elsewhere"), - oid_to_hex(&cur_oid)); - - if (generation_zero == GENERATION_ZERO_EXISTS) - continue; - - /* - * If one of our parents has generation GENERATION_NUMBER_MAX, then - * our generation is also GENERATION_NUMBER_MAX. Decrement to avoid - * extra logic in the following condition. - */ - if (max_generation == GENERATION_NUMBER_MAX) - max_generation--; - - generation = commit_graph_generation(graph_commit); - if (generation != max_generation + 1) - graph_report(_("commit-graph generation for commit %s is %u != %u"), - oid_to_hex(&cur_oid), - generation, - max_generation + 1); - - if (graph_commit->date != odb_commit->date) - graph_report(_("commit date for commit %s in commit-graph is %"PRItime" != %"PRItime), - oid_to_hex(&cur_oid), - graph_commit->date, - odb_commit->date); - } - stop_progress(&progress); - - local_error = verify_commit_graph_error; - - if (!(flags & COMMIT_GRAPH_VERIFY_SHALLOW) && g->base_graph) - local_error |= verify_commit_graph(r, g->base_graph, flags); - - return local_error; -} - -void free_commit_graph(struct commit_graph *g) -{ - if (!g) - return; - if (g->data) { - munmap((void *)g->data, g->data_len); - g->data = NULL; - } - free(g->filename); - free(g->bloom_filter_settings); - free(g); -} - -void disable_commit_graph(struct repository *r) -{ - r->commit_graph_disabled = 1; -} |