enable-block-validity-by-default

   1 ext4: enable block_validity by default
   2
   3 From: "Darrick J. Wong" <darrick.wong@oracle.com>
   4
   5 Enable by default the block_validity feature, which checks for
   6 collisions between newly allocated blocks and critical system
   7 metadata.
   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/ext4/super.c |    4 ++--
  13  1 file changed, 2 insertions(+), 2 deletions(-)
  14
  15 diff --git a/fs/ext4/super.c b/fs/ext4/super.c
  16 index 0b28b36..bbf515c 100644
  17 --- a/fs/ext4/super.c
  18 +++ b/fs/ext4/super.c
  19 @@ -3519,8 +3519,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
  20                 set_opt(sb, ERRORS_CONT);
  21         else
  22                 set_opt(sb, ERRORS_RO);
  23 -       if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)
  24 -               set_opt(sb, BLOCK_VALIDITY);
  25 +       /* block_validity enabled by default; disable with noblock_validity */
  26 +       set_opt(sb, BLOCK_VALIDITY);
  27         if (def_mount_opts & EXT4_DEFM_DISCARD)
  28                 set_opt(sb, DISCARD);
  29
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