#include "cache.h"
#include "pack.h"
-#define BATCH (1u<<20)
-
-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];
- struct pack_header *hdr;
+ unsigned long offset = 0, pack_sig = p->pack_size - 20;
int nr_objects, err, i;
- unsigned char *packdata;
- unsigned long datasize;
-
- /* 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));
-
- /* Check integrity of pack data with its SHA-1 checksum */
+
+ /* 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);
- packdata = p->pack_base;
- datasize = p->pack_size - 20;
- while (datasize) {
- unsigned long batch = (datasize < BATCH) ? datasize : BATCH;
- SHA1_Update(&ctx, packdata, batch);
- datasize -= batch;
- packdata += batch;
+ 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 *)(p->pack_base) + p->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];
void *data;
offset = find_pack_entry_one(sha1, p);
if (!offset)
die("internal error pack-check find-pack-entry-one");
- data = unpack_entry_gently(p, offset, 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++) {
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);
}
}