| From | Kamal Mostafa <> | Subject | [PATCH 054/145] jbd2: move superblock checksum calculation to jbd2_write_superblock() | Date | Wed, 17 Jul 2013 15:46:26 -0700 |
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3.8.13.5 -stable review patch. If anyone has any objections, please let me know.
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From: Theodore Ts'o <tytso@mit.edu>
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: Luis Henriques <luis.henriques@canonical.com> --- fs/jbd2/journal.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 42f8cf6c..ea9feb9 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -1303,6 +1303,7 @@ 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); @@ -1324,6 +1325,7 @@ 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); @@ -1420,7 +1422,6 @@ 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); -- 1.8.1.2
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