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jbd2: fix invalid descriptor block checksum 

In jbd2_journal_commit_transaction(), if we are in abort mode,
we may flush the buffer without setting descriptor block checksum
by goto start_journal_io. Then fs is mounted,
jbd2_descriptor_block_csum_verify() failed.

[  271.379811] EXT4-fs (vdd): shut down requested (2)
[  271.381827] Aborting journal on device vdd-8.
[  271.597136] JBD2: Invalid checksum recovering block 22199 in log
[  271.598023] JBD2: recovery failed
[  271.598484] EXT4-fs (vdd): error loading journal

Fix this problem by keep setting descriptor block checksum if the
descriptor buffer is not NULL.

This checksum problem can be reproduced by xfstests generic/388.

Signed-off-by: luojiajun <luojiajun3@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
This commit is contained in:
luojiajun 2019-03-01 00:30:00 -05:00 committed by Theodore Ts'o
parent 7bd75230b4
commit 6e876c3dd2
1 changed files with 4 additions and 2 deletions
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6
fs/jbd2/commit.c
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@ -694,9 +694,11 @@ void jbd2_journal_commit_transaction(journal_t *journal)
the last tag we set up. */
tag->t_flags |= cpu_to_be16(JBD2_FLAG_LAST_TAG);
jbd2_descriptor_block_csum_set(journal, descriptor);
start_journal_io:
if (descriptor)
jbd2_descriptor_block_csum_set(journal,
descriptor);
for (i = 0; i < bufs; i++) {
struct buffer_head *bh = wbuf[i];
/*