On 2022-08-29 18:12, Ido Schimmel wrote:

On Mon, Aug 29, 2022 at 04:02:46PM +0200, netdev@kapio-technology.com 
wrote:

quoted

On 2022-08-27 13:30, Nikolay Aleksandrov wrote:

quoted

On 26/08/2022 14:45, Hans Schultz wrote:

Hi,
Please add the blackhole flag in a separate patch.
A few more comments and questions below..

Hi,
if userspace is to set this flag I think I need to change stuff in
rtnetlink.c, as I will need to extent struct ndmsg with a new u32 
entry as
the old u8 flags is full.

You cannot extend 'struct ndmsg'. That's why 'NDA_FLAGS_EXT' was
introduced. See:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2c611ad97a82b51221bb0920cc6cac0b1d4c0e52

'NTF_EXT_BLACKHOLE' belongs in 'NDA_FLAGS_EXT' like you have it now, 
but
the kernel should not reject it in br_fdb_add().

quoted

Maybe this is straight forward, but I am not so sure as I don't know 
that
code too well. Maybe someone can give me a hint...?

Thanks! I see that I was in trouble there... :D