From 56ad5ba344dea9c914331da8754f5ba7cede9941 Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Thu, 11 Mar 2021 19:03:19 +0100 Subject: nexthop: Allow setting "offload" and "trap" indication of nexthop buckets Add a function that can be called by device drivers to set "offload" or "trap" indication on nexthop buckets following nexthop notifications and other changes such as a neighbour becoming invalid. Signed-off-by: Ido Schimmel Reviewed-by: Petr Machata Reviewed-by: David Ahern Signed-off-by: Petr Machata Signed-off-by: David S. Miller --- net/ipv4/nexthop.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'net/ipv4') diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c index 8b06aafc2e9e..1fce4ff39390 100644 --- a/net/ipv4/nexthop.c +++ b/net/ipv4/nexthop.c @@ -3072,6 +3072,40 @@ out: } EXPORT_SYMBOL(nexthop_set_hw_flags); +void nexthop_bucket_set_hw_flags(struct net *net, u32 id, u16 bucket_index, + bool offload, bool trap) +{ + struct nh_res_table *res_table; + struct nh_res_bucket *bucket; + struct nexthop *nexthop; + struct nh_group *nhg; + + rcu_read_lock(); + + nexthop = nexthop_find_by_id(net, id); + if (!nexthop || !nexthop->is_group) + goto out; + + nhg = rcu_dereference(nexthop->nh_grp); + if (!nhg->resilient) + goto out; + + if (bucket_index >= nhg->res_table->num_nh_buckets) + goto out; + + res_table = rcu_dereference(nhg->res_table); + bucket = &res_table->nh_buckets[bucket_index]; + bucket->nh_flags &= ~(RTNH_F_OFFLOAD | RTNH_F_TRAP); + if (offload) + bucket->nh_flags |= RTNH_F_OFFLOAD; + if (trap) + bucket->nh_flags |= RTNH_F_TRAP; + +out: + rcu_read_unlock(); +} +EXPORT_SYMBOL(nexthop_bucket_set_hw_flags); + static void __net_exit nexthop_net_exit(struct net *net) { rtnl_lock(); -- cgit