Re: [PATCH net v2 1/2] ipv6: do not delete previously existing ECMP routes if add fails

[Nicolas Dichtel]

Le 13/05/2015 21:59, Michal Kubecek a Ãcrit :
> If adding a nexthop of an IPv6 multipath route fails, comment in
> ip6_route_multipath() says we are going to delete all nexthops already
> added. However, current implementation deletes even the routes it
> hasn't even tried to add yet. For example, running
>
>    ip route add 1234:5678::/64 \
>        nexthop via fe80::aa dev dummy1 \
>        nexthop via fe80::bb dev dummy1 \
>        nexthop via fe80::cc dev dummy1
>
> twice results in removing all routes first command added.
>
> Limit the second (delete) run to nexthops that succeeded in the first
> (add) run.
>
> Fixes: 51ebd3181572 ("ipv6: add support of equal cost multipath (ECMP)")
> Signed-off-by: Michal Kubecek <mkubecek@xxxxxxx>
Acked-by: Nicolas Dichtel <nicolas.dichtel@xxxxxxxxx>
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