enable-journal-checksum-when-metadata-checksum-feature-enabled

   1 ext4: enable journal checksum when metadata checksum feature enabled
   2
   3 From: "Darrick J. Wong" <darrick.wong@oracle.com>
   4
   5 If metadata checksumming is turned on for the FS, we need to tell the
   6 journal to use checksumming too.
   7
   8 Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
   9 Signed-off-by: Theodore Ts'o <tytso@mit.edu>
  10 Cc: stable@vger.kernel.org
  11 ---
  12  fs/ext4/super.c |    4 ++++
  13  1 file changed, 4 insertions(+)
  14
  15
  16 diff --git a/fs/ext4/super.c b/fs/ext4/super.c
  17 index 1eda6ab..5c11e21 100644
  18 --- a/fs/ext4/super.c
  19 +++ b/fs/ext4/super.c
  20 @@ -3526,6 +3526,10 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
  21  #ifdef CONFIG_EXT4_FS_POSIX_ACL
  22         set_opt(sb, POSIX_ACL);
  23  #endif
  24 +       /* don't forget to enable journal_csum when metadata_csum is enabled. */
  25 +       if (ext4_has_metadata_csum(sb))
  26 +               set_opt(sb, JOURNAL_CHECKSUM);
  27 +
  28         if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA)
  29                 set_opt(sb, JOURNAL_DATA);
  30         else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED)
  31
  32