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net_sched: convert rsvp to call tcf_exts_destroy from rcu callback 

Adjust destroy path of cls_rsvp to call tcf_exts_destroy() after
rcu grace period.

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexei Starovoitov 2015-08-25 20:06:34 -07:00 committed by David S. Miller
parent ed7aa879ce
commit 9e528d8915
1 changed files with 14 additions and 4 deletions
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18
net/sched/cls_rsvp.h
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@ -283,12 +283,22 @@ static int rsvp_init(struct tcf_proto *tp)
return -ENOBUFS;
}
static void
rsvp_delete_filter(struct tcf_proto *tp, struct rsvp_filter *f)
static void rsvp_delete_filter_rcu(struct rcu_head *head)
{
struct rsvp_filter *f = container_of(head, struct rsvp_filter, rcu);
tcf_exts_destroy(&f->exts);
kfree(f);
}
static void rsvp_delete_filter(struct tcf_proto *tp, struct rsvp_filter *f)
{
tcf_unbind_filter(tp, &f->res);
tcf_exts_destroy(&f->exts);
kfree_rcu(f, rcu);
/* all classifiers are required to call tcf_exts_destroy() after rcu
* grace period, since converted-to-rcu actions are relying on that
* in cleanup() callback
*/
call_rcu(&f->rcu, rsvp_delete_filter_rcu);
}
static bool rsvp_destroy(struct tcf_proto *tp, bool force)