report-delalloc-reserve-as-non-free-in-statfs-for-project-quota

   1 ext4: report delalloc reserve as non-free in statfs for project quota
   2
   3 From: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
   4
   5 This reserved space isn't committed yet but cannot be used for allocations.
   6 For userspace it has no difference from used space. XFS already does this.
   7
   8 Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
   9 Signed-off-by: Theodore Ts'o <tytso@mit.edu>
  10 Reviewed-by: Jan Kara <jack@suse.cz>
  11 Fixes: 689c958cbe6b ("ext4: add project quota support")
  12 ---
  13  fs/ext4/super.c |    3 ++-
  14  1 file changed, 2 insertions(+), 1 deletion(-)
  15
  16 diff --git a/fs/ext4/super.c b/fs/ext4/super.c
  17 index 5de959fb0244..13ce97b9e820 100644
  18 --- a/fs/ext4/super.c
  19 +++ b/fs/ext4/super.c
  20 @@ -5227,7 +5227,8 @@ static int ext4_statfs_project(struct super_block *sb,
  21                  dquot->dq_dqb.dqb_bsoftlimit :
  22                  dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits;
  23         if (limit && buf->f_blocks > limit) {
  24 -               curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits;
  25 +               curblock = (dquot->dq_dqb.dqb_curspace +
  26 +                           dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
  27                 buf->f_blocks = limit;
  28                 buf->f_bfree = buf->f_bavail =
  29                         (buf->f_blocks > curblock) ?
  30
  31