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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_mirred.c
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@@ -322,6 +322,13 @@ static struct net_device *tcf_mirred_get_dev(const struct tc_action *a)
return rtnl_dereference(m->tcfm_dev);
}
static int tcf_mirred_delete(struct net *net, u32 index)
{
struct tc_action_net *tn = net_generic(net, mirred_net_id);
return tcf_idr_delete_index(tn, index);
}
static struct tc_action_ops act_mirred_ops = {
.kind = "mirred",
.type = TCA_ACT_MIRRED,
@@ -335,6 +342,7 @@ static struct tc_action_ops act_mirred_ops = {
.lookup = tcf_mirred_search,
.size = sizeof(struct tcf_mirred),
.get_dev = tcf_mirred_get_dev,
.delete = tcf_mirred_delete,
};
static __net_init int mirred_init_net(struct net *net)