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authorBrian Foster <bfoster@redhat.com>2017-08-09 04:21:53 +0300
committerDarrick J. Wong <darrick.wong@oracle.com>2017-08-22 19:22:24 +0300
commita4c9b34d6a17081005ec459b57b8effc08f4c731 (patch)
treec0b42c9514c4820149a8e1bb18906efaf47c84f7 /fs/xfs/xfs_log_recover.c
parent7f4d01f36a3ac16f539f0fd3839de5d58fa4940f (diff)
downloadlinux-a4c9b34d6a17081005ec459b57b8effc08f4c731.tar.xz
xfs: handle -EFSCORRUPTED during head/tail verification
Torn write and tail overwrite detection both trigger only on -EFSBADCRC errors. While this is the most likely failure scenario for each condition, -EFSCORRUPTED is still possible in certain cases depending on what ends up on disk when a torn write or partial tail overwrite occurs. For example, an invalid log record h_len can lead to an -EFSCORRUPTED error when running the log recovery CRC pass. Therefore, update log head and tail verification to trigger the associated head/tail fixups in the event of -EFSCORRUPTED errors along with -EFSBADCRC. Also, -EFSCORRUPTED can currently be returned from xlog_do_recovery_pass() before rhead_blk is initialized if the first record encountered happens to be corrupted. This leads to an incorrect 'first_bad' return value. Initialize rhead_blk earlier in the function to address that problem as well. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/xfs_log_recover.c')
-rw-r--r--fs/xfs/xfs_log_recover.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index a5e2ca8f5cd6..43d5df3a563f 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -1102,7 +1102,7 @@ xlog_verify_tail(
first_bad = 0;
error = xlog_do_recovery_pass(log, head_blk, *tail_blk,
XLOG_RECOVER_CRCPASS, &first_bad);
- while (error == -EFSBADCRC && first_bad) {
+ while ((error == -EFSBADCRC || error == -EFSCORRUPTED) && first_bad) {
int tail_distance;
/*
@@ -1188,7 +1188,7 @@ xlog_verify_head(
*/
error = xlog_do_recovery_pass(log, *head_blk, tmp_rhead_blk,
XLOG_RECOVER_CRCPASS, &first_bad);
- if (error == -EFSBADCRC) {
+ if ((error == -EFSBADCRC || error == -EFSCORRUPTED) && first_bad) {
/*
* We've hit a potential torn write. Reset the error and warn
* about it.
@@ -5257,7 +5257,7 @@ xlog_do_recovery_pass(
LIST_HEAD (buffer_list);
ASSERT(head_blk != tail_blk);
- rhead_blk = 0;
+ blk_no = rhead_blk = tail_blk;
for (i = 0; i < XLOG_RHASH_SIZE; i++)
INIT_HLIST_HEAD(&rhash[i]);
@@ -5335,7 +5335,6 @@ xlog_do_recovery_pass(
}
memset(rhash, 0, sizeof(rhash));
- blk_no = rhead_blk = tail_blk;
if (tail_blk > head_blk) {
/*
* Perform recovery around the end of the physical log.