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net: sched: add 'delete' function to action ops

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Extend action ops with 'delete' function. Each action type to implements
its own delete function that doesn't depend on rtnl lock.

Implement delete function that is required to delete actions without
holding rtnl lock. Use action API function that atomically deletes action
only if it is still in action idr. This implementation prevents concurrent
threads from deleting same action twice.

Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Buslov
2018-07-05 17:24:28 +03:00
committed by David S. Miller
parent 2a2ea34970
commit b409074e66
17 changed files with 137 additions and 0 deletions
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8
net/sched/act_skbmod.c
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@@ -253,6 +253,13 @@ static int tcf_skbmod_search(struct net *net, struct tc_action **a, u32 index,
return tcf_idr_search(tn, a, index);
}
static int tcf_skbmod_delete(struct net *net, u32 index)
{
struct tc_action_net *tn = net_generic(net, skbmod_net_id);
return tcf_idr_delete_index(tn, index);
}
static struct tc_action_ops act_skbmod_ops = {
.kind = "skbmod",
.type = TCA_ACT_SKBMOD,
@@ -263,6 +270,7 @@ static struct tc_action_ops act_skbmod_ops = {
.cleanup = tcf_skbmod_cleanup,
.walk = tcf_skbmod_walker,
.lookup = tcf_skbmod_search,
.delete = tcf_skbmod_delete,
.size = sizeof(struct tcf_skbmod),
};