From e95f2592f633a334b175003f13f42d3c217dc657 Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Wed, 4 Nov 2020 15:30:28 +0200 Subject: [PATCH] nexthop: Allow setting "offload" and "trap" indications on nexthops Add a function that can be called by device drivers to set "offload" or "trap" indication on nexthops following nexthop notifications. Changes since RFC: * s/nexthop_hw_flags_set/nexthop_set_hw_flags/ Signed-off-by: Ido Schimmel Signed-off-by: Jakub Kicinski --- include/net/nexthop.h | 1 + net/ipv4/nexthop.c | 21 +++++++++++++++++++++ 2 files changed, 22 insertions(+) diff --git a/include/net/nexthop.h b/include/net/nexthop.h index 4a17b040b502..aa7ac12c35e2 100644 --- a/include/net/nexthop.h +++ b/include/net/nexthop.h @@ -145,6 +145,7 @@ struct nh_notifier_info { int register_nexthop_notifier(struct net *net, struct notifier_block *nb); int unregister_nexthop_notifier(struct net *net, struct notifier_block *nb); +void nexthop_set_hw_flags(struct net *net, u32 id, bool offload, bool trap); /* caller is holding rcu or rtnl; no reference taken to nexthop */ struct nexthop *nexthop_find_by_id(struct net *net, u32 id); diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c index 1d66f2439063..d1a1600aee18 100644 --- a/net/ipv4/nexthop.c +++ b/net/ipv4/nexthop.c @@ -2081,6 +2081,27 @@ int unregister_nexthop_notifier(struct net *net, struct notifier_block *nb) } EXPORT_SYMBOL(unregister_nexthop_notifier); +void nexthop_set_hw_flags(struct net *net, u32 id, bool offload, bool trap) +{ + struct nexthop *nexthop; + + rcu_read_lock(); + + nexthop = nexthop_find_by_id(net, id); + if (!nexthop) + goto out; + + nexthop->nh_flags &= ~(RTNH_F_OFFLOAD | RTNH_F_TRAP); + if (offload) + nexthop->nh_flags |= RTNH_F_OFFLOAD; + if (trap) + nexthop->nh_flags |= RTNH_F_TRAP; + +out: + rcu_read_unlock(); +} +EXPORT_SYMBOL(nexthop_set_hw_flags); + static void __net_exit nexthop_net_exit(struct net *net) { rtnl_lock(); -- 2.11.0