linux-kernel - [PATCH] f2fs: report delalloc reserve as non-free in statfs for project quota

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Date:   Mon, 11 May 2020 09:15:18 +0300
From:   Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
To:     linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net,
        Jaegeuk Kim <jaegeuk@...nel.org>, Chao Yu <chao@...nel.org>
Subject: [PATCH] f2fs: report delalloc reserve as non-free in statfs for
 project quota

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

See the same fix in ext4 commit f06925c73942 ("ext4: report delalloc
reserve as non-free in statfs for project quota").

Signed-off-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Fixes: ddc34e328d06 ("f2fs: introduce f2fs_statfs_project")
---
 fs/f2fs/super.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index f2dfc21c6abb..c5e8cb31626f 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1292,7 +1292,8 @@ static int f2fs_statfs_project(struct super_block *sb,
 		limit >>= 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) ?