Hi Chao, thanks for the review.

On Tue, Jun 25, 2019 at 03:55:57PM +0800, Chao Yu wrote:

Hi Eric,

On 2019/6/21 4:50, Eric Biggers wrote:

quoted

+static int f2fs_begin_enable_verity(struct file *filp)
+{
+	struct inode *inode = file_inode(filp);
+	int err;
+

I think we'd better add condition here (under inode lock) to disallow enabling
verity on atomic/volatile inode, as we may fail to write merkle tree data due to
atomic/volatile inode's special writeback method.

Yes, I'll add the following:

	if (f2fs_is_atomic_file(inode) || f2fs_is_volatile_file(inode))
		return -EOPNOTSUPP;

quoted

+	err = f2fs_convert_inline_inode(inode);
+	if (err)
+		return err;
+
+	err = dquot_initialize(inode);
+	if (err)
+		return err;

We can get rid of dquot_initialize() here, since f2fs_file_open() ->
dquot_file_open() should has initialized quota entry previously, right?

We still need it because dquot_file_open() only calls dquot_initialize() if the
file is being opened for writing.  But here the file descriptor is readonly.
I'll add a comment explaining this here and in the ext4 equivalent.

- Eric