return 0;
}
+static int jbd2_descr_block_csum_verify(journal_t *j,
+ void *buf)
+{
+ struct journal_block_tail *tail;
+ __u32 provided, calculated;
+
+ if (!JFS_HAS_INCOMPAT_FEATURE(j, JFS_FEATURE_INCOMPAT_CSUM_V2))
+ return 1;
+
+ tail = (struct journal_block_tail *)(buf + j->j_blocksize -
+ sizeof(struct journal_block_tail));
+ provided = tail->t_checksum;
+ tail->t_checksum = 0;
+ calculated = ext2fs_crc32c_le(~0, j->j_superblock->s_uuid,
+ sizeof(j->j_superblock->s_uuid));
+ calculated = ext2fs_crc32c_le(calculated, buf, j->j_blocksize);
+ tail->t_checksum = provided;
+
+ provided = ext2fs_be32_to_cpu(provided);
+ return provided == calculated;
+}
/*
* Count the number of in-use tags in a journal descriptor block.
int nr = 0, size = journal->j_blocksize;
int tag_bytes = journal_tag_bytes(journal);
+ if (JFS_HAS_INCOMPAT_FEATURE(journal, JFS_FEATURE_INCOMPAT_CSUM_V2))
+ size -= sizeof(struct journal_block_tail);
+
tagp = &bh->b_data[sizeof(journal_header_t)];
while ((tagp - bh->b_data + tag_bytes) <= size) {
nr++;
tagp += tag_bytes;
- if (!(tag->t_flags & cpu_to_be32(JFS_FLAG_SAME_UUID)))
+ if (!(tag->t_flags & cpu_to_be16(JFS_FLAG_SAME_UUID)))
tagp += 16;
- if (tag->t_flags & cpu_to_be32(JFS_FLAG_LAST_TAG))
+ if (tag->t_flags & cpu_to_be16(JFS_FLAG_LAST_TAG))
break;
}
num_blks = count_tags(journal, bh);
/* Calculate checksum of the descriptor block. */
- *crc32_sum = crc32_be(*crc32_sum, (void *)bh->b_data, bh->b_size);
+ *crc32_sum = ext2fs_crc32_be(*crc32_sum, (void *)bh->b_data,
+ bh->b_size);
for (i = 0; i < num_blks; i++) {
io_block = (*next_log_block)++;
"%llu in log\n", err, io_block);
return 1;
} else {
- *crc32_sum = crc32_be(*crc32_sum, (void *)obh->b_data,
- obh->b_size);
+ *crc32_sum = ext2fs_crc32_be(*crc32_sum,
+ (void *)obh->b_data,
+ obh->b_size);
}
brelse(obh);
}
return 0;
}
+static int jbd2_commit_block_csum_verify(journal_t *j, void *buf)
+{
+ struct commit_header *h;
+ __u32 provided, calculated;
+
+ if (!JFS_HAS_INCOMPAT_FEATURE(j, JFS_FEATURE_INCOMPAT_CSUM_V2))
+ return 1;
+
+ h = buf;
+ provided = h->h_chksum[0];
+ h->h_chksum[0] = 0;
+ calculated = ext2fs_crc32c_le(~0, j->j_superblock->s_uuid,
+ sizeof(j->j_superblock->s_uuid));
+ calculated = ext2fs_crc32c_le(calculated, buf, j->j_blocksize);
+ h->h_chksum[0] = provided;
+
+ provided = ext2fs_be32_to_cpu(provided);
+ return provided == calculated;
+}
+
+static int jbd2_block_tag_csum_verify(journal_t *j, journal_block_tag_t *tag,
+ void *buf, __u32 sequence)
+{
+ __u32 provided, calculated;
+
+ if (!JFS_HAS_INCOMPAT_FEATURE(j, JFS_FEATURE_INCOMPAT_CSUM_V2))
+ return 1;
+
+ sequence = ext2fs_cpu_to_be32(sequence);
+ calculated = ext2fs_crc32c_le(~0, j->j_superblock->s_uuid,
+ sizeof(j->j_superblock->s_uuid));
+ calculated = ext2fs_crc32c_le(calculated, (__u8 *)&sequence,
+ sizeof(sequence));
+ calculated = ext2fs_crc32c_le(calculated, buf, j->j_blocksize) & 0xffff;
+ provided = ext2fs_be16_to_cpu(tag->t_checksum);
+
+ return provided == ext2fs_cpu_to_be32(calculated);
+}
+
static int do_one_pass(journal_t *journal,
struct recovery_info *info, enum passtype pass)
{
int blocktype;
int tag_bytes = journal_tag_bytes(journal);
__u32 crc32_sum = ~0; /* Transactional Checksums */
+ int descr_csum_size = 0;
/*
* First thing is to establish what we expect to find in the log
switch(blocktype) {
case JFS_DESCRIPTOR_BLOCK:
+ /* Verify checksum first */
+ if (JFS_HAS_INCOMPAT_FEATURE(journal,
+ JFS_FEATURE_INCOMPAT_CSUM_V2))
+ descr_csum_size =
+ sizeof(struct journal_block_tail);
+ if (descr_csum_size > 0 &&
+ !jbd2_descr_block_csum_verify(journal,
+ bh->b_data)) {
+ err = -EIO;
+ goto failed;
+ }
+
/* If it is a valid descriptor block, replay it
* in pass REPLAY; if journal_checksums enabled, then
* calculate checksums in PASS_SCAN, otherwise,
tagp = &bh->b_data[sizeof(journal_header_t)];
while ((tagp - bh->b_data + tag_bytes)
- <= journal->j_blocksize) {
+ <= journal->j_blocksize - descr_csum_size) {
unsigned long long io_block;
tag = (journal_block_tag_t *) tagp;
- flags = be32_to_cpu(tag->t_flags);
+ flags = be16_to_cpu(tag->t_flags);
io_block = next_log_block++;
wrap(journal, next_log_block);
goto skip_write;
}
+ /* Look for block corruption */
+ if (!jbd2_block_tag_csum_verify(
+ journal, tag, obh->b_data,
+ be32_to_cpu(tmp->h_sequence))) {
+ brelse(obh);
+ success = -EIO;
+ printk(KERN_ERR "JBD: Invalid "
+ "checksum recovering "
+ "block %ld in log\n",
+ blocknr);
+ continue;
+ }
+
/* Find a buffer for the new
* data being restored */
nbh = __getblk(journal->j_fs_dev,
}
crc32_sum = ~0;
}
+ if (pass == PASS_SCAN &&
+ !jbd2_commit_block_csum_verify(journal,
+ bh->b_data)) {
+ info->end_transaction = next_commit_ID;
+
+ if (!JFS_HAS_INCOMPAT_FEATURE(journal,
+ JFS_FEATURE_INCOMPAT_ASYNC_COMMIT)) {
+ journal->j_failed_commit =
+ next_commit_ID;
+ brelse(bh);
+ break;
+ }
+ }
brelse(bh);
next_commit_ID++;
continue;
return err;
}
+static int jbd2_revoke_block_csum_verify(journal_t *j,
+ void *buf)
+{
+ struct journal_revoke_tail *tail;
+ __u32 provided, calculated;
+
+ if (!JFS_HAS_INCOMPAT_FEATURE(j, JFS_FEATURE_INCOMPAT_CSUM_V2))
+ return 1;
+
+ tail = (struct journal_revoke_tail *)(buf + j->j_blocksize -
+ sizeof(struct journal_revoke_tail));
+ provided = tail->r_checksum;
+ tail->r_checksum = 0;
+ calculated = ext2fs_crc32c_le(~0, j->j_superblock->s_uuid,
+ sizeof(j->j_superblock->s_uuid));
+ calculated = ext2fs_crc32c_le(calculated, buf, j->j_blocksize);
+ tail->r_checksum = provided;
+
+ provided = ext2fs_be32_to_cpu(provided);
+ return provided == calculated;
+}
/* Scan a revoke record, marking all blocks mentioned as revoked. */
offset = sizeof(journal_revoke_header_t);
max = be32_to_cpu(header->r_count);
+ if (!jbd2_revoke_block_csum_verify(journal, header))
+ return -EINVAL;
+
if (JFS_HAS_INCOMPAT_FEATURE(journal, JFS_FEATURE_INCOMPAT_64BIT))
record_len = 8;
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff