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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>
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2 changed files with 22 additions and 0 deletions
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@ -145,6 +145,7 @@ struct nh_notifier_info {
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int register_nexthop_notifier(struct net *net, struct notifier_block *nb);
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int unregister_nexthop_notifier(struct net *net, struct notifier_block *nb);
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void nexthop_set_hw_flags(struct net *net, u32 id, bool offload, bool trap);
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/* caller is holding rcu or rtnl; no reference taken to nexthop */
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struct nexthop *nexthop_find_by_id(struct net *net, u32 id);
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@ -2081,6 +2081,27 @@ int unregister_nexthop_notifier(struct net *net, struct notifier_block *nb)
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}
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EXPORT_SYMBOL(unregister_nexthop_notifier);
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void nexthop_set_hw_flags(struct net *net, u32 id, bool offload, bool trap)
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{
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struct nexthop *nexthop;
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rcu_read_lock();
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nexthop = nexthop_find_by_id(net, id);
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if (!nexthop)
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goto out;
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nexthop->nh_flags &= ~(RTNH_F_OFFLOAD | RTNH_F_TRAP);
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if (offload)
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nexthop->nh_flags |= RTNH_F_OFFLOAD;
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if (trap)
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nexthop->nh_flags |= RTNH_F_TRAP;
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out:
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rcu_read_unlock();
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}
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EXPORT_SYMBOL(nexthop_set_hw_flags);
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static void __net_exit nexthop_net_exit(struct net *net)
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{
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rtnl_lock();
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