complain-about-descriptor-block-checksum-errors

   1 jbd2: complain about descriptor block checksum errors
   2
   3 From: "Darrick J. Wong" <darrick.wong@oracle.com>
   4
   5 We should complain in dmesg when journal recovery fails on account of
   6 the descriptor block being corrupt, so that the diagnostic data can
   7 be recovered.
   8
   9 Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
  10 Signed-off-by: Theodore Ts'o <tytso@mit.edu>
  11 ---
  12  fs/jbd2/recovery.c |    3 +++
  13  1 file changed, 3 insertions(+)
  14
  15 diff --git a/fs/jbd2/recovery.c b/fs/jbd2/recovery.c
  16 index bcbef08..b5128c6 100644
  17 --- a/fs/jbd2/recovery.c
  18 +++ b/fs/jbd2/recovery.c
  19 @@ -524,6 +524,9 @@ static int do_one_pass(journal_t *journal,
  20                         if (descr_csum_size > 0 &&
  21                             !jbd2_descr_block_csum_verify(journal,
  22                                                           bh->b_data)) {
  23 +                               printk(KERN_ERR "JBD2: Invalid checksum "
  24 +                                      "recovering block %lu in log\n",
  25 +                                      next_log_block);
  26                                 err = -EIO;
  27                                 brelse(bh);
  28                                 goto failed;
  29