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@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 2cf16ed..427ab1b 100644 (file)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1598,6 +1598,9 @@ static int f2fs_ioc_start_volatile_write(struct file *filp)
        if (!inode_owner_or_capable(inode))
                return -EACCES;
 
+       if (!S_ISREG(inode->i_mode))
+               return -EINVAL;
+
        ret = mnt_want_write_file(filp);
        if (ret)
                return ret;