linux-kernel - [PATCH AUTOSEL 4.9 7/7] quota: make dquot_quota_sync return errors from ->sync

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Message-Id: <20220209184550.48481-7-sashal@kernel.org>
Date:   Wed,  9 Feb 2022 13:45:50 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     "Darrick J. Wong" <djwong@...nel.org>, Jan Kara <jack@...e.cz>,
        Christoph Hellwig <hch@....de>,
        Christian Brauner <brauner@...nel.org>,
        Sasha Levin <sashal@...nel.org>, jack@...e.com
Subject: [PATCH AUTOSEL 4.9 7/7] quota: make dquot_quota_sync return errors from ->sync_fs

From: "Darrick J. Wong" <djwong@...nel.org>

[ Upstream commit dd5532a4994bfda0386eb2286ec00758cee08444 ]

Strangely, dquot_quota_sync ignores the return code from the ->sync_fs
call, which means that quotacalls like Q_SYNC never see the error.  This
doesn't seem right, so fix that.

Signed-off-by: Darrick J. Wong <djwong@...nel.org>
Reviewed-by: Jan Kara <jack@...e.cz>
Reviewed-by: Christoph Hellwig <hch@....de>
Acked-by: Christian Brauner <brauner@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/quota/dquot.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 82a5ecbe2da96..022b237c6a134 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -676,9 +676,14 @@ int dquot_quota_sync(struct super_block *sb, int type)
 	/* This is not very clever (and fast) but currently I don't know about
 	 * any other simple way of getting quota data to disk and we must get
 	 * them there for userspace to be visible... */
-	if (sb->s_op->sync_fs)
-		sb->s_op->sync_fs(sb, 1);
-	sync_blockdev(sb->s_bdev);
+	if (sb->s_op->sync_fs) {
+		ret = sb->s_op->sync_fs(sb, 1);
+		if (ret)
+			return ret;
+	}
+	ret = sync_blockdev(sb->s_bdev);
+	if (ret)
+		return ret;
 
 	/*
 	 * Now when everything is written we can discard the pagecache so
-- 
2.34.1