Re: [PATCH AUTOSEL for 4.15 058/124] ipv6: Set nexthop flags during route creation

Sasha Levin
2018-03-21T21:02:12Z

On Mon, Mar 19, 2018 at 08:04:34PM +0200, Ido Schimmel wrote:
>On Mon, Mar 19, 2018 at 03:48:00PM +0000, Sasha Levin wrote:
>> From: Ido Schimmel <idosch@mellanox.com>
>>
>> [ Upstream commit 5609b80a37f69f796548339e675256188b29c17d ]
>>
>> It is valid to install routes with a nexthop device that does not have a
>> carrier, so we need to make sure they're marked accordingly.
>>
>> As explained in the previous patch, host and anycast routes are never
>> marked with the 'linkdown' flag.
>>
>> Note that reject routes are unaffected, as these use the loopback device
>> which always has a carrier.
>>
>> Signed-off-by: Ido Schimmel <idosch@mellanox.com>
>> Acked-by: David Ahern <dsahern@gmail.com>
>> Signed-off-by: David S. Miller <davem@davemloft.net>
>> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
>
>Hi Sasha,
>
>It doesn't really make sense to take this patch to 4.15 (and 4.14 from
>your other mail). The flag is never used there.
>
>In these kernels the flag is dumped to user space based on a carrier
>check. See commit 44c9f2f206f8 ("ipv6: Check nexthop flags in route dump
>instead of carrier").
>
>Similarly, during route lookup the carrier is checked and not the flag.
>See commit 14c5206c2d02 ("ipv6: Check nexthop flags during route lookup
>instead of carrier").

Removed from both trees, thanks!

--

Thanks,
Sasha