[PATCH] ext4: report delalloc reserve as non-free in statfs mangled by project quota

[Konstantin Khlebnikov]

This reserved space isn't committed yet but cannot be used for allocations.
For userspace it has no difference from used space. XFS already does this.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx>
Fixes: 689c958cbe6b ("ext4: add project quota support")
---
 fs/ext4/super.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 5de959fb0244..13ce97b9e820 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5227,7 +5227,8 @@ static int ext4_statfs_project(struct super_block *sb,
 		 dquot->dq_dqb.dqb_bsoftlimit :
 		 dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits;
 	if (limit && buf->f_blocks > limit) {
-		curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits;
+		curblock = (dquot->dq_dqb.dqb_curspace +
+			    dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
 		buf->f_blocks = limit;
 		buf->f_bfree = buf->f_bavail =
 			(buf->f_blocks > curblock) ?