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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 <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ido Schimmel 2020-11-04 15:30:28 +02:00 committed by Jakub Kicinski
parent 968a83f8cf
commit e95f2592f6
2 changed files with 22 additions and 0 deletions
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1
include/net/nexthop.h
View File

@ -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);

21
net/ipv4/nexthop.c
View File

@ -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();