#include "sha1-lookup.h"
#include "commit-graph.h"
#include "object-store.h"
+#include "alloc.h"
#define GRAPH_SIGNATURE 0x43475048 /* "CGPH" */
#define GRAPH_CHUNKID_OIDFANOUT 0x4f494446 /* "OIDF" */
{
struct commit *c;
struct object_id oid;
+
+ if (pos >= g->num_commits)
+ die("invalid parent position %"PRIu64, pos);
+
hashcpy(oid.hash, g->chunk_oid_lookup + g->hash_len * pos);
c = lookup_commit(&oid);
if (!c)
va_end(ap);
}
+#define GENERATION_ZERO_EXISTS 1
+#define GENERATION_NUMBER_EXISTS 2
+
int verify_commit_graph(struct repository *r, struct commit_graph *g)
{
+ uint32_t i, cur_fanout_pos = 0;
+ struct object_id prev_oid, cur_oid;
+ int generation_zero = 0;
+
if (!g) {
graph_report("no commit-graph file loaded");
return 1;
}
+ verify_commit_graph_error = 0;
+
+ if (!g->chunk_oid_fanout)
+ graph_report("commit-graph is missing the OID Fanout chunk");
+ if (!g->chunk_oid_lookup)
+ graph_report("commit-graph is missing the OID Lookup chunk");
+ if (!g->chunk_commit_data)
+ graph_report("commit-graph is missing the Commit Data chunk");
+
+ if (verify_commit_graph_error)
+ return verify_commit_graph_error;
+
+ 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(&cur_oid);
+ if (!parse_commit_in_graph_one(g, graph_commit))
+ graph_report("failed to parse %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)
+ return verify_commit_graph_error;
+
+ 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;
+
+ hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i);
+
+ graph_commit = lookup_commit(&cur_oid);
+ odb_commit = (struct commit *)create_object(r, cur_oid.hash, alloc_commit_node(r));
+ if (parse_commit_internal(odb_commit, 0, 0)) {
+ graph_report("failed to parse %s from object database",
+ oid_to_hex(&cur_oid));
+ continue;
+ }
+
+ if (oidcmp(&get_commit_tree_in_graph_one(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;
+ }
+
+ if (oidcmp(&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));
+
+ if (graph_parents->item->generation > max_generation)
+ max_generation = graph_parents->item->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 (!graph_commit->generation) {
+ 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--;
+
+ if (graph_commit->generation != max_generation + 1)
+ graph_report("commit-graph generation for commit %s is %u != %u",
+ oid_to_hex(&cur_oid),
+ graph_commit->generation,
+ max_generation + 1);
+ }
+
return verify_commit_graph_error;
}