linux-kernel - [PATCH] f2fs: don't allow volatile writes for non-regular file

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Message-ID: <20170317033217.5371-1-yuchao0@huawei.com>
Date:   Fri, 17 Mar 2017 11:32:17 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     <jaegeuk@...nel.org>
CC:     <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>, <chao@...nel.org>,
        Chao Yu <yuchao0@...wei.com>
Subject: [PATCH] f2fs: don't allow volatile writes for non-regular file

Now f2fs only supports volatile writes for journal db regular file.

Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
 fs/f2fs/file.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index d486e02b43c2..e090d34f732d 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1593,6 +1593,9 @@ static int f2fs_ioc_start_volatile_write(struct file *filp)
 	if (!inode_owner_or_capable(inode))
 		return -EACCES;
 
+	if (!S_ISREG(inode))
+		return -EINVAL;
+
 	ret = mnt_want_write_file(filp);
 	if (ret)
 		return ret;
-- 
2.8.2.295.g3f1c1d0