Commit e95f2592 authored by Ido Schimmel's avatar Ido Schimmel Committed by Jakub Kicinski
Browse files

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: default avatarIdo Schimmel <idosch@nvidia.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 968a83f8

include/net/nexthop.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

net/ipv4/nexthop.c

+21 −0
Original line number Diff line number Diff line
@@ -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();