jbd2: move superblock checksum calculation to jbd2_write_superblock()

commit fe52d17cdd343ac43c85cf72940a58865b9d3bfb upstream.

Some of the functions which modify the jbd2 superblock were not
updating the checksum before calling jbd2_write_superblock().  Move
the call to jbd2_superblock_csum_set() to jbd2_write_superblock(), so
that the checksum is calculated consistently.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 95457576e434..aaa1a3f33b0e 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1318,6 +1318,7 @@ static int journal_reset(journal_t *journal)
 static void jbd2_write_superblock(journal_t *journal, int write_op)
 {
         struct buffer_head *bh = journal->j_sb_buffer;
+        journal_superblock_t *sb = journal->j_superblock;
         int ret;
 
         trace_jbd2_write_superblock(journal, write_op);
@@ -1339,6 +1340,7 @@ static void jbd2_write_superblock(journal_t *journal, int write_op)
                 clear_buffer_write_io_error(bh);
                 set_buffer_uptodate(bh);
         }
+        jbd2_superblock_csum_set(journal, sb);
         get_bh(bh);
         bh->b_end_io = end_buffer_write_sync;
         ret = submit_bh(write_op, bh);
@@ -1435,7 +1437,6 @@ void jbd2_journal_update_sb_errno(journal_t *journal)
         jbd_debug(1, "JBD2: updating superblock error (errno %d)\n",
                   journal->j_errno);
         sb->s_errno    = cpu_to_be32(journal->j_errno);
-        jbd2_superblock_csum_set(journal, sb);
         read_unlock(&journal->j_state_lock);
 
         jbd2_write_superblock(journal, WRITE_SYNC);