int nr_revoke_hits;
};
-enum passtype {PASS_SCAN, PASS_REVOKE, PASS_REPLAY};
static int do_one_pass(journal_t *journal,
struct recovery_info *info, enum passtype pass);
static int scan_revoke_records(journal_t *, struct buffer_head *,
/* Do up to 128K of readahead */
max = start + (128 * 1024 / journal->j_blocksize);
- if (max > journal->j_maxlen)
- max = journal->j_maxlen;
+ if (max > journal->j_total_len)
+ max = journal->j_total_len;
/* Do the readahead itself. We'll submit MAXBUF buffer_heads at
* a time to the block device IO layer. */
#endif /* __KERNEL__ */
-static inline __u32 get_be32(__be32 *p)
-{
- unsigned char *cp = (unsigned char *) p;
- __u32 ret;
-
- ret = *cp++;
- ret = (ret << 8) + *cp++;
- ret = (ret << 8) + *cp++;
- ret = (ret << 8) + *cp++;
- return ret;
-}
-
-static inline __u16 get_be16(__be16 *p)
-{
- unsigned char *cp = (unsigned char *) p;
- __u16 ret;
-
- ret = *cp++;
- ret = (ret << 8) + *cp++;
- return ret;
-}
/*
* Read a block from the journal
*bhp = NULL;
- if (offset >= journal->j_maxlen) {
+ if (offset >= journal->j_total_len) {
printk(KERN_ERR "JBD2: corrupted journal superblock\n");
return -EFSCORRUPTED;
}
return 0;
}
-static int jbd2_descr_block_csum_verify(journal_t *j,
- void *buf)
+static int jbd2_descriptor_block_csum_verify(journal_t *j, void *buf)
{
struct jbd2_journal_block_tail *tail;
- __u32 provided;
+ __be32 provided;
__u32 calculated;
if (!jbd2_journal_has_csum_v2or3(j))
return 1;
- tail = (struct jbd2_journal_block_tail *)((char *)buf + j->j_blocksize -
- sizeof(struct jbd2_journal_block_tail));
+ tail = (struct jbd2_journal_block_tail *)((char *)buf +
+ j->j_blocksize - sizeof(struct jbd2_journal_block_tail));
provided = tail->t_checksum;
tail->t_checksum = 0;
calculated = jbd2_chksum(j, j->j_csum_seed, buf, j->j_blocksize);
tail->t_checksum = provided;
- return provided == ext2fs_cpu_to_be32(calculated);
+ return provided == cpu_to_be32(calculated);
}
/*
static int count_tags(journal_t *journal, struct buffer_head *bh)
{
char * tagp;
- journal_block_tag_t * tag;
+ journal_block_tag_t tag;
int nr = 0, size = journal->j_blocksize;
int tag_bytes = journal_tag_bytes(journal);
tagp = &bh->b_data[sizeof(journal_header_t)];
while ((tagp - bh->b_data + tag_bytes) <= size) {
- tag = (journal_block_tag_t *) tagp;
+ memcpy(&tag, tagp, sizeof(tag));
nr++;
tagp += tag_bytes;
- if (!(get_be16(&tag->t_flags) & JBD2_FLAG_SAME_UUID))
+ if (!(tag.t_flags & cpu_to_be16(JBD2_FLAG_SAME_UUID)))
tagp += 16;
- if (get_be16(&tag->t_flags) & JBD2_FLAG_LAST_TAG)
+ if (tag.t_flags & cpu_to_be16(JBD2_FLAG_LAST_TAG))
break;
}
/* Make sure we wrap around the log correctly! */
#define wrap(journal, var) \
do { \
- if (var >= (journal)->j_last) \
- var -= ((journal)->j_last - (journal)->j_first); \
+ unsigned long _wrap_last = \
+ jbd2_has_feature_fast_commit(journal) ? \
+ (journal)->j_fc_last : (journal)->j_last; \
+ \
+ if (var >= _wrap_last) \
+ var -= (_wrap_last - (journal)->j_first); \
} while (0)
+static int fc_do_one_pass(journal_t *journal,
+ struct recovery_info *info, enum passtype pass)
+{
+ unsigned int expected_commit_id = info->end_transaction;
+ unsigned long next_fc_block;
+ struct buffer_head *bh;
+ int err = 0;
+
+ next_fc_block = journal->j_fc_first;
+ if (!journal->j_fc_replay_callback)
+ return 0;
+
+ while (next_fc_block <= journal->j_fc_last) {
+ jbd_debug(3, "Fast commit replay: next block %ld\n",
+ next_fc_block);
+ err = jread(&bh, journal, next_fc_block);
+ if (err) {
+ jbd_debug(3, "Fast commit replay: read error\n");
+ break;
+ }
+
+ err = journal->j_fc_replay_callback(journal, bh, pass,
+ next_fc_block - journal->j_fc_first,
+ expected_commit_id);
+ next_fc_block++;
+ if (err < 0 || err == JBD2_FC_REPLAY_STOP)
+ break;
+ err = 0;
+ }
+
+ if (err)
+ jbd_debug(3, "Fast commit replay failed, err = %d\n", err);
+
+ return err;
+}
+
/**
* jbd2_journal_recover - recovers a on-disk journal
* @journal: the journal to recover
if (!sb->s_start) {
jbd_debug(1, "No recovery required, last transaction %d\n",
- ext2fs_be32_to_cpu(sb->s_sequence));
- journal->j_transaction_sequence = ext2fs_be32_to_cpu(sb->s_sequence) + 1;
+ be32_to_cpu(sb->s_sequence));
+ journal->j_transaction_sequence = be32_to_cpu(sb->s_sequence) + 1;
return 0;
}
err = err2;
/* Make sure all replayed data is on permanent storage */
if (journal->j_flags & JBD2_BARRIER) {
- err2 = blkdev_issue_flush(journal->j_fs_dev, GFP_KERNEL, NULL);
+ err2 = blkdev_issue_flush(journal->j_fs_dev);
if (!err)
err = err2;
}
++journal->j_transaction_sequence;
} else {
#ifdef CONFIG_JBD2_DEBUG
- int dropped = info.end_transaction -
- ext2fs_be32_to_cpu(journal->j_superblock->s_sequence);
+ int dropped = info.end_transaction -
+ be32_to_cpu(journal->j_superblock->s_sequence);
jbd_debug(1,
"JBD2: ignoring %d transaction%s from the journal.\n",
dropped, (dropped == 1) ? "" : "s");
static inline unsigned long long read_tag_block(journal_t *journal,
journal_block_tag_t *tag)
{
- unsigned long long block = get_be32(&tag->t_blocknr);
+ unsigned long long block = be32_to_cpu(tag->t_blocknr);
if (jbd2_has_feature_64bit(journal))
- block |= (u64)get_be32(&tag->t_blocknr_high) << 32;
+ block |= (u64)be32_to_cpu(tag->t_blocknr_high) << 32;
return block;
}
static int jbd2_commit_block_csum_verify(journal_t *j, void *buf)
{
struct commit_header *h;
- __u32 provided;
+ __be32 provided;
__u32 calculated;
if (!jbd2_journal_has_csum_v2or3(j))
calculated = jbd2_chksum(j, j->j_csum_seed, buf, j->j_blocksize);
h->h_chksum[0] = provided;
- return provided == ext2fs_cpu_to_be32(calculated);
+ return provided == cpu_to_be32(calculated);
}
static int jbd2_block_tag_csum_verify(journal_t *j, journal_block_tag_t *tag,
+ journal_block_tag3_t *tag3,
void *buf, __u32 sequence)
{
- journal_block_tag3_t *tag3 = (journal_block_tag3_t *)tag;
__u32 csum32;
- __u32 seq;
+ __be32 seq;
if (!jbd2_journal_has_csum_v2or3(j))
return 1;
- seq = ext2fs_cpu_to_be32(sequence);
+ seq = cpu_to_be32(sequence);
csum32 = jbd2_chksum(j, j->j_csum_seed, (__u8 *)&seq, sizeof(seq));
csum32 = jbd2_chksum(j, csum32, buf, j->j_blocksize);
if (jbd2_has_feature_csum3(j))
- return get_be32(&tag3->t_checksum) == csum32;
-
- return get_be16(&tag->t_checksum) == (csum32 & 0xFFFF);
+ return tag3->t_checksum == cpu_to_be32(csum32);
+ else
+ return tag->t_checksum == cpu_to_be16(csum32);
}
static int do_one_pass(journal_t *journal,
__u32 crc32_sum = ~0; /* Transactional Checksums */
int descr_csum_size = 0;
int block_error = 0;
+ bool need_check_commit_time = false;
+ __u64 last_trans_commit_time = 0, commit_time;
/*
* First thing is to establish what we expect to find in the log
*/
sb = journal->j_superblock;
- next_commit_ID = ext2fs_be32_to_cpu(sb->s_sequence);
- next_log_block = ext2fs_be32_to_cpu(sb->s_start);
+ next_commit_ID = be32_to_cpu(sb->s_sequence);
+ next_log_block = be32_to_cpu(sb->s_start);
first_commit_ID = next_commit_ID;
if (pass == PASS_SCAN)
while (1) {
int flags;
char * tagp;
- journal_block_tag_t * tag;
+ journal_block_tag_t tag;
struct buffer_head * obh;
struct buffer_head * nbh;
break;
jbd_debug(2, "Scanning for sequence ID %u at %lu/%lu\n",
- next_commit_ID, next_log_block, journal->j_last);
+ next_commit_ID, next_log_block,
+ jbd2_has_feature_fast_commit(journal) ?
+ journal->j_fc_last : journal->j_last);
/* Skip over each chunk of the transaction looking
* either the next descriptor block or the final commit
tmp = (journal_header_t *)bh->b_data;
- if (tmp->h_magic != ext2fs_cpu_to_be32(JBD2_MAGIC_NUMBER)) {
+ if (tmp->h_magic != cpu_to_be32(JBD2_MAGIC_NUMBER)) {
brelse(bh);
break;
}
- blocktype = ext2fs_be32_to_cpu(tmp->h_blocktype);
- sequence = ext2fs_be32_to_cpu(tmp->h_sequence);
+ blocktype = be32_to_cpu(tmp->h_blocktype);
+ sequence = be32_to_cpu(tmp->h_sequence);
jbd_debug(3, "Found magic %d, sequence %d\n",
blocktype, sequence);
descr_csum_size =
sizeof(struct jbd2_journal_block_tail);
if (descr_csum_size > 0 &&
- !jbd2_descr_block_csum_verify(journal,
- bh->b_data)) {
- err = -EFSBADCRC;
- brelse(bh);
- goto failed;
+ !jbd2_descriptor_block_csum_verify(journal,
+ bh->b_data)) {
+ /*
+ * PASS_SCAN can see stale blocks due to lazy
+ * journal init. Don't error out on those yet.
+ */
+ if (pass != PASS_SCAN) {
+ pr_err("JBD2: Invalid checksum recovering block %lu in log\n",
+ next_log_block);
+ err = -EFSBADCRC;
+ brelse(bh);
+ goto failed;
+ }
+ need_check_commit_time = true;
+ jbd_debug(1,
+ "invalid descriptor block found in %lu\n",
+ next_log_block);
}
/* If it is a valid descriptor block, replay it
if (pass != PASS_REPLAY) {
if (pass == PASS_SCAN &&
jbd2_has_feature_checksum(journal) &&
+ !need_check_commit_time &&
!info->end_transaction) {
if (calc_chksums(journal, bh,
&next_log_block,
<= journal->j_blocksize - descr_csum_size) {
unsigned long io_block;
- tag = (journal_block_tag_t *) tagp;
- flags = get_be16(&tag->t_flags);
+ memcpy(&tag, tagp, sizeof(tag));
+ flags = be16_to_cpu(tag.t_flags);
io_block = next_log_block++;
wrap(journal, next_log_block);
J_ASSERT(obh != NULL);
blocknr = read_tag_block(journal,
- tag);
+ &tag);
/* If the block has been
* revoked, then we're all done
/* Look for block corruption */
if (!jbd2_block_tag_csum_verify(
- journal, tag, obh->b_data,
- ext2fs_be32_to_cpu(tmp->h_sequence))) {
+ journal, &tag, (journal_block_tag3_t *)tagp,
+ obh->b_data, be32_to_cpu(tmp->h_sequence))) {
brelse(obh);
success = -EFSBADCRC;
printk(KERN_ERR "JBD2: Invalid "
memcpy(nbh->b_data, obh->b_data,
journal->j_blocksize);
if (flags & JBD2_FLAG_ESCAPE) {
- __u32 magic = ext2fs_cpu_to_be32(JBD2_MAGIC_NUMBER);
- memcpy(nbh->b_data, &magic,
- sizeof(magic));
+ *((__be32 *)nbh->b_data) =
+ cpu_to_be32(JBD2_MAGIC_NUMBER);
}
BUFFER_TRACE(nbh, "marking dirty");
* | GO TO NEXT "Journal Corruption"
* | TRANSACTION
* |
- * {(n+1)th transaction}
+ * {(n+1)th transanction}
* |
* _______|______________
* | |
* mentioned conditions. Hence assume
* "Interrupted Commit".)
*/
+ commit_time = be64_to_cpu(
+ ((struct commit_header *)bh->b_data)->h_commit_sec);
+ /*
+ * If need_check_commit_time is set, it means we are in
+ * PASS_SCAN and csum verify failed before. If
+ * commit_time is increasing, it's the same journal,
+ * otherwise it is stale journal block, just end this
+ * recovery.
+ */
+ if (need_check_commit_time) {
+ if (commit_time >= last_trans_commit_time) {
+ pr_err("JBD2: Invalid checksum found in transaction %u\n",
+ next_commit_ID);
+ err = -EFSBADCRC;
+ brelse(bh);
+ goto failed;
+ }
+ ignore_crc_mismatch:
+ /*
+ * It likely does not belong to same journal,
+ * just end this recovery with success.
+ */
+ jbd_debug(1, "JBD2: Invalid checksum ignored in transaction %u, likely stale data\n",
+ next_commit_ID);
+ brelse(bh);
+ goto done;
+ }
- /* Found an expected commit block: if checksums
- * are present verify them in PASS_SCAN; else not
+ /*
+ * Found an expected commit block: if checksums
+ * are present, verify them in PASS_SCAN; else not
* much to do other than move on to the next sequence
- * number. */
+ * number.
+ */
if (pass == PASS_SCAN &&
jbd2_has_feature_checksum(journal)) {
- int chksum_err, chksum_seen;
struct commit_header *cbh =
(struct commit_header *)bh->b_data;
unsigned found_chksum =
- ext2fs_be32_to_cpu(cbh->h_chksum[0]);
-
- chksum_err = chksum_seen = 0;
+ be32_to_cpu(cbh->h_chksum[0]);
if (info->end_transaction) {
journal->j_failed_commit =
break;
}
- if (crc32_sum == found_chksum &&
- cbh->h_chksum_type == JBD2_CRC32_CHKSUM &&
- cbh->h_chksum_size ==
- JBD2_CRC32_CHKSUM_SIZE)
- chksum_seen = 1;
- else if (!(cbh->h_chksum_type == 0 &&
- cbh->h_chksum_size == 0 &&
- found_chksum == 0 &&
- !chksum_seen))
- /*
- * If fs is mounted using an old kernel and then
- * kernel with journal_chksum is used then we
- * get a situation where the journal flag has
- * checksum flag set but checksums are not
- * present i.e chksum = 0, in the individual
- * commit blocks.
- * Hence to avoid checksum failures, in this
- * situation, this extra check is added.
- */
- chksum_err = 1;
-
- if (chksum_err) {
- info->end_transaction = next_commit_ID;
+ /* Neither checksum match nor unused? */
+ if (!((crc32_sum == found_chksum &&
+ cbh->h_chksum_type ==
+ JBD2_CRC32_CHKSUM &&
+ cbh->h_chksum_size ==
+ JBD2_CRC32_CHKSUM_SIZE) ||
+ (cbh->h_chksum_type == 0 &&
+ cbh->h_chksum_size == 0 &&
+ found_chksum == 0)))
+ goto chksum_error;
- if (!jbd2_has_feature_async_commit(journal)) {
- journal->j_failed_commit =
- next_commit_ID;
- brelse(bh);
- break;
- }
- }
crc32_sum = ~0;
}
if (pass == PASS_SCAN &&
!jbd2_commit_block_csum_verify(journal,
bh->b_data)) {
+ chksum_error:
+ if (commit_time < last_trans_commit_time)
+ goto ignore_crc_mismatch;
info->end_transaction = next_commit_ID;
if (!jbd2_has_feature_async_commit(journal)) {
break;
}
}
+ if (pass == PASS_SCAN)
+ last_trans_commit_time = commit_time;
brelse(bh);
next_commit_ID++;
continue;
case JBD2_REVOKE_BLOCK:
+ /*
+ * Check revoke block crc in pass_scan, if csum verify
+ * failed, check commit block time later.
+ */
+ if (pass == PASS_SCAN &&
+ !jbd2_descriptor_block_csum_verify(journal,
+ bh->b_data)) {
+ jbd_debug(1, "JBD2: invalid revoke block found in %lu\n",
+ next_log_block);
+ need_check_commit_time = true;
+ }
/* If we aren't in the REVOKE pass, then we can
* just skip over this block. */
if (pass != PASS_REVOKE) {
success = -EIO;
}
}
+
+ if (jbd2_has_feature_fast_commit(journal) && pass != PASS_REVOKE) {
+ err = fc_do_one_pass(journal, info, pass);
+ if (err)
+ success = err;
+ }
+
if (block_error && success == 0)
success = -EIO;
return success;
return err;
}
-static int jbd2_revoke_block_csum_verify(journal_t *j,
- void *buf)
-{
- struct journal_revoke_tail *tail;
- __u32 provided;
- __u32 calculated;
-
- if (!jbd2_journal_has_csum_v2or3(j))
- return 1;
-
- tail = (struct journal_revoke_tail *)((char *)buf + j->j_blocksize -
- sizeof(struct journal_revoke_tail));
- provided = tail->r_checksum;
- tail->r_checksum = 0;
- calculated = jbd2_chksum(j, j->j_csum_seed, buf, j->j_blocksize);
- tail->r_checksum = provided;
-
- return provided == ext2fs_cpu_to_be32(calculated);
-}
-
/* Scan a revoke record, marking all blocks mentioned as revoked. */
static int scan_revoke_records(journal_t *journal, struct buffer_head *bh,
header = (jbd2_journal_revoke_header_t *) bh->b_data;
offset = sizeof(jbd2_journal_revoke_header_t);
- rcount = ext2fs_be32_to_cpu(header->r_count);
-
- if (!jbd2_revoke_block_csum_verify(journal, header))
- return -EFSBADCRC;
+ rcount = be32_to_cpu(header->r_count);
if (jbd2_journal_has_csum_v2or3(journal))
- csum_size = sizeof(struct journal_revoke_tail);
+ csum_size = sizeof(struct jbd2_journal_block_tail);
if (rcount > journal->j_blocksize - csum_size)
return -EINVAL;
max = rcount;
int err;
if (record_len == 4)
- blocknr = ext2fs_be32_to_cpu(* ((__u32 *) (bh->b_data+offset)));
+ blocknr = be32_to_cpu(* ((__be32 *) (bh->b_data+offset)));
else
- blocknr = ext2fs_be64_to_cpu(* ((__u64 *) (bh->b_data+offset)));
+ blocknr = be64_to_cpu(* ((__be64 *) (bh->b_data+offset)));
offset += record_len;
err = jbd2_journal_set_revoke(journal, blocknr, sequence);
if (err)
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff