mirror of
https://github.com/git/git
synced 2024-08-27 19:49:21 +00:00
![Nguyễn Thái Ngọc Duy](/assets/img/avatar_default.png)
fsck is usually a long process and it would be nice if it prints progress from time to time. Progress meter is not printed when --verbose is given because --verbose prints a lot, there's no need for "alive" indicator. Progress meter may provide "% complete" information but it would be lost anyway in the flood of text. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
182 lines
5 KiB
C
182 lines
5 KiB
C
#include "cache.h"
|
|
#include "pack.h"
|
|
#include "pack-revindex.h"
|
|
#include "progress.h"
|
|
|
|
struct idx_entry {
|
|
off_t offset;
|
|
const unsigned char *sha1;
|
|
unsigned int nr;
|
|
};
|
|
|
|
static int compare_entries(const void *e1, const void *e2)
|
|
{
|
|
const struct idx_entry *entry1 = e1;
|
|
const struct idx_entry *entry2 = e2;
|
|
if (entry1->offset < entry2->offset)
|
|
return -1;
|
|
if (entry1->offset > entry2->offset)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
int check_pack_crc(struct packed_git *p, struct pack_window **w_curs,
|
|
off_t offset, off_t len, unsigned int nr)
|
|
{
|
|
const uint32_t *index_crc;
|
|
uint32_t data_crc = crc32(0, NULL, 0);
|
|
|
|
do {
|
|
unsigned long avail;
|
|
void *data = use_pack(p, w_curs, offset, &avail);
|
|
if (avail > len)
|
|
avail = len;
|
|
data_crc = crc32(data_crc, data, avail);
|
|
offset += avail;
|
|
len -= avail;
|
|
} while (len);
|
|
|
|
index_crc = p->index_data;
|
|
index_crc += 2 + 256 + p->num_objects * (20/4) + nr;
|
|
|
|
return data_crc != ntohl(*index_crc);
|
|
}
|
|
|
|
static int verify_packfile(struct packed_git *p,
|
|
struct pack_window **w_curs,
|
|
verify_fn fn,
|
|
struct progress *progress, uint32_t base_count)
|
|
|
|
{
|
|
off_t index_size = p->index_size;
|
|
const unsigned char *index_base = p->index_data;
|
|
git_SHA_CTX ctx;
|
|
unsigned char sha1[20], *pack_sig;
|
|
off_t offset = 0, pack_sig_ofs = 0;
|
|
uint32_t nr_objects, i;
|
|
int err = 0;
|
|
struct idx_entry *entries;
|
|
|
|
/* 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.
|
|
*/
|
|
|
|
git_SHA1_Init(&ctx);
|
|
do {
|
|
unsigned long remaining;
|
|
unsigned char *in = use_pack(p, w_curs, offset, &remaining);
|
|
offset += remaining;
|
|
if (!pack_sig_ofs)
|
|
pack_sig_ofs = p->pack_size - 20;
|
|
if (offset > pack_sig_ofs)
|
|
remaining -= (unsigned int)(offset - pack_sig_ofs);
|
|
git_SHA1_Update(&ctx, in, remaining);
|
|
} while (offset < pack_sig_ofs);
|
|
git_SHA1_Final(sha1, &ctx);
|
|
pack_sig = use_pack(p, w_curs, pack_sig_ofs, NULL);
|
|
if (hashcmp(sha1, pack_sig))
|
|
err = error("%s SHA1 checksum mismatch",
|
|
p->pack_name);
|
|
if (hashcmp(index_base + index_size - 40, pack_sig))
|
|
err = error("%s SHA1 does not match its index",
|
|
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 = p->num_objects;
|
|
entries = xmalloc((nr_objects + 1) * sizeof(*entries));
|
|
entries[nr_objects].offset = pack_sig_ofs;
|
|
/* first sort entries by pack offset, since unpacking them is more efficient that way */
|
|
for (i = 0; i < nr_objects; i++) {
|
|
entries[i].sha1 = nth_packed_object_sha1(p, i);
|
|
if (!entries[i].sha1)
|
|
die("internal error pack-check nth-packed-object");
|
|
entries[i].offset = nth_packed_object_offset(p, i);
|
|
entries[i].nr = i;
|
|
}
|
|
qsort(entries, nr_objects, sizeof(*entries), compare_entries);
|
|
|
|
for (i = 0; i < nr_objects; i++) {
|
|
void *data;
|
|
enum object_type type;
|
|
unsigned long size;
|
|
|
|
if (p->index_version > 1) {
|
|
off_t offset = entries[i].offset;
|
|
off_t len = entries[i+1].offset - offset;
|
|
unsigned int nr = entries[i].nr;
|
|
if (check_pack_crc(p, w_curs, offset, len, nr))
|
|
err = error("index CRC mismatch for object %s "
|
|
"from %s at offset %"PRIuMAX"",
|
|
sha1_to_hex(entries[i].sha1),
|
|
p->pack_name, (uintmax_t)offset);
|
|
}
|
|
data = unpack_entry(p, entries[i].offset, &type, &size);
|
|
if (!data)
|
|
err = error("cannot unpack %s from %s at offset %"PRIuMAX"",
|
|
sha1_to_hex(entries[i].sha1), p->pack_name,
|
|
(uintmax_t)entries[i].offset);
|
|
else if (check_sha1_signature(entries[i].sha1, data, size, typename(type)))
|
|
err = error("packed %s from %s is corrupt",
|
|
sha1_to_hex(entries[i].sha1), p->pack_name);
|
|
else if (fn) {
|
|
int eaten = 0;
|
|
fn(entries[i].sha1, type, size, data, &eaten);
|
|
if (eaten)
|
|
data = NULL;
|
|
}
|
|
if (((base_count + i) & 1023) == 0)
|
|
display_progress(progress, base_count + i);
|
|
free(data);
|
|
|
|
}
|
|
display_progress(progress, base_count + i);
|
|
free(entries);
|
|
|
|
return err;
|
|
}
|
|
|
|
int verify_pack_index(struct packed_git *p)
|
|
{
|
|
off_t index_size;
|
|
const unsigned char *index_base;
|
|
git_SHA_CTX ctx;
|
|
unsigned char sha1[20];
|
|
int err = 0;
|
|
|
|
if (open_pack_index(p))
|
|
return error("packfile %s index not opened", p->pack_name);
|
|
index_size = p->index_size;
|
|
index_base = p->index_data;
|
|
|
|
/* Verify SHA1 sum of the index file */
|
|
git_SHA1_Init(&ctx);
|
|
git_SHA1_Update(&ctx, index_base, (unsigned int)(index_size - 20));
|
|
git_SHA1_Final(sha1, &ctx);
|
|
if (hashcmp(sha1, index_base + index_size - 20))
|
|
err = error("Packfile index for %s SHA1 mismatch",
|
|
p->pack_name);
|
|
return err;
|
|
}
|
|
|
|
int verify_pack(struct packed_git *p, verify_fn fn,
|
|
struct progress *progress, uint32_t base_count)
|
|
{
|
|
int err = 0;
|
|
struct pack_window *w_curs = NULL;
|
|
|
|
err |= verify_pack_index(p);
|
|
if (!p->index_data)
|
|
return -1;
|
|
|
|
err |= verify_packfile(p, &w_curs, fn, progress, base_count);
|
|
unuse_pack(&w_curs);
|
|
|
|
return err;
|
|
}
|