#include "cache.h"
#include "pack.h"
-static int verify_packfile(struct packed_git *p)
+static int verify_packfile(struct packed_git *p,
+ struct pack_window **w_curs)
{
unsigned long index_size = p->index_size;
void *index_base = p->index_base;
SHA_CTX ctx;
unsigned char sha1[20];
- unsigned long pack_size = p->pack_size;
- void *pack_base;
- struct pack_header *hdr;
+ unsigned long offset = 0, pack_sig = p->pack_size - 20;
int nr_objects, err, i;
- /* Header consistency check */
- hdr = p->pack_base;
- if (hdr->hdr_signature != htonl(PACK_SIGNATURE))
- return error("Packfile %s signature mismatch", p->pack_name);
- if (!pack_version_ok(hdr->hdr_version))
- return error("Packfile version %d unsupported",
- ntohl(hdr->hdr_version));
- nr_objects = ntohl(hdr->hdr_entries);
- if (num_packed_objects(p) != nr_objects)
- return error("Packfile claims to have %d objects, "
- "while idx size expects %d", nr_objects,
- num_packed_objects(p));
+ /* Note that the pack header checks are actually performed by
+ * use_pack when it first opens the pack file. If anything
+ * goes wrong during those checks then the call will die out
+ * immediately.
+ */
SHA1_Init(&ctx);
- pack_base = p->pack_base;
- SHA1_Update(&ctx, pack_base, pack_size - 20);
+ while (offset < pack_sig) {
+ unsigned int remaining;
+ unsigned char *in = use_pack(p, w_curs, offset, &remaining);
+ offset += remaining;
+ if (offset > pack_sig)
+ remaining -= offset - pack_sig;
+ SHA1_Update(&ctx, in, remaining);
+ }
SHA1_Final(sha1, &ctx);
- if (hashcmp(sha1, (unsigned char *)pack_base + pack_size - 20))
+ if (hashcmp(sha1, use_pack(p, w_curs, pack_sig, NULL)))
return error("Packfile %s SHA1 mismatch with itself",
p->pack_name);
if (hashcmp(sha1, (unsigned char *)index_base + index_size - 40))
return error("Packfile %s SHA1 mismatch with idx",
p->pack_name);
+ unuse_pack(w_curs);
/* Make sure everything reachable from idx is valid. Since we
* have verified that nr_objects matches between idx and pack,
* we do not do scan-streaming check on the pack file.
*/
+ nr_objects = num_packed_objects(p);
for (i = err = 0; i < nr_objects; i++) {
unsigned char sha1[20];
- struct pack_entry e;
void *data;
char type[20];
- unsigned long size;
+ unsigned long size, offset;
if (nth_packed_object_sha1(p, i, sha1))
die("internal error pack-check nth-packed-object");
- if (!find_pack_entry_one(sha1, &e, p))
+ offset = find_pack_entry_one(sha1, p);
+ if (!offset)
die("internal error pack-check find-pack-entry-one");
- data = unpack_entry_gently(&e, type, &size);
+ data = unpack_entry(p, offset, type, &size);
if (!data) {
err = error("cannot unpack %s from %s",
sha1_to_hex(sha1), p->pack_name);
static void show_pack_info(struct packed_git *p)
{
- struct pack_header *hdr;
int nr_objects, i;
unsigned int chain_histogram[MAX_CHAIN];
- hdr = p->pack_base;
- nr_objects = ntohl(hdr->hdr_entries);
+ nr_objects = num_packed_objects(p);
memset(chain_histogram, 0, sizeof(chain_histogram));
for (i = 0; i < nr_objects; i++) {
unsigned char sha1[20], base_sha1[20];
- struct pack_entry e;
char type[20];
unsigned long size;
unsigned long store_size;
+ unsigned long offset;
unsigned int delta_chain_length;
if (nth_packed_object_sha1(p, i, sha1))
die("internal error pack-check nth-packed-object");
- if (!find_pack_entry_one(sha1, &e, p))
+ offset = find_pack_entry_one(sha1, p);
+ if (!offset)
die("internal error pack-check find-pack-entry-one");
- packed_object_info_detail(&e, type, &size, &store_size,
+ packed_object_info_detail(p, offset, type, &size, &store_size,
&delta_chain_length,
base_sha1);
printf("%s ", sha1_to_hex(sha1));
if (!delta_chain_length)
- printf("%-6s %lu %u\n", type, size, e.offset);
+ printf("%-6s %lu %lu\n", type, size, offset);
else {
- printf("%-6s %lu %u %u %s\n", type, size, e.offset,
+ printf("%-6s %lu %lu %u %s\n", type, size, offset,
delta_chain_length, sha1_to_hex(base_sha1));
if (delta_chain_length < MAX_CHAIN)
chain_histogram[delta_chain_length]++;
if (!ret) {
/* Verify pack file */
- use_packed_git(p);
- ret = verify_packfile(p);
- unuse_packed_git(p);
+ struct pack_window *w_curs = NULL;
+ ret = verify_packfile(p, &w_curs);
+ unuse_pack(&w_curs);
}
if (verbose) {
if (ret)
printf("%s: bad\n", p->pack_name);
else {
- use_packed_git(p);
show_pack_info(p);
- unuse_packed_git(p);
printf("%s: ok\n", p->pack_name);
}
}