# Re: \[RFC PATCH net-next\] rtnetlink: add RTNH\_F\_REJECT\_MASK

- From: Alexander Mikhalitsyn \<hidden\>
- Date: 2021-11-11 19:23:45 
- List: netdev
- Page: https://ratatoskr.run/netdev/2021/11/11215949
- Thread: https://ratatoskr.run/netdev/2021/11/11215934/t.md

```text
On Thu, Nov 11, 2021 at 10:13 PM David Ahern [ref] wrote:
>
> On 11/11/21 9:02 AM, Alexander Mikhalitsyn wrote:
> > diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h
> > index 5888492a5257..c15e591e5d25 100644
> > --- a/include/uapi/linux/rtnetlink.h
> > +++ b/include/uapi/linux/rtnetlink.h
> > @@ -417,6 +417,9 @@ struct rtnexthop {
> >  #define RTNH_COMPARE_MASK    (RTNH_F_DEAD | RTNH_F_LINKDOWN | \
> >                                RTNH_F_OFFLOAD | RTNH_F_TRAP)
> >
> > +/* these flags can't be set by the userspace */
> > +#define RTNH_F_REJECT_MASK   (RTNH_F_DEAD | RTNH_F_LINKDOWN)
> > +
> >  /* Macros to handle hexthops */
>
> Userspace can not set any of the flags in RTNH_COMPARE_MASK.

Hi David,

thanks! So, I have to prepare a patch which fixes current checks for rtnh_flags
against RTNH_COMPARE_MASK. So, there is no need to introduce a separate
RTNH_F_REJECT_MASK.
Am I right?

Regards,
Alex
```