Re: [PATCH RFC v3] fs: Avoid create file when open() with O_DIRECT if fs not support

[weiping zhang <zhangweiping@xxxxxxxxxxxxxxx>]

On Mon, Aug 28, 2017 at 09:07:27PM +0800, weiping zhang wrote:
> Some filesystems not support O_DIRECT, when user open with O_DIRECT ,
> an errno -EINVAL return to userspace by open_check_o_direct, but the
> file has been created, it's a strange thing. Add a checking for that
> can avoid creating file if fs not support O_DIRECT.
> 

Hi AI,

would you please give some comments for this patch,

---
v2 -> v3:
introduce a new function for checking inode support direct io or not.

v1 -> v2:
a common way checking if fs support direct io, no matter what
underlaying filesystem is.

Thanks