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Diffstat (limited to 'net/sched/cls_fw.c')
-rw-r--r--net/sched/cls_fw.c37
1 files changed, 32 insertions, 5 deletions
diff --git a/net/sched/cls_fw.c b/net/sched/cls_fw.c
index 941245ad07fd..20f0de1a960a 100644
--- a/net/sched/cls_fw.c
+++ b/net/sched/cls_fw.c
@@ -28,6 +28,7 @@
#include <net/netlink.h>
#include <net/act_api.h>
#include <net/pkt_cls.h>
+#include <net/sch_generic.h>
#define HTSIZE 256
@@ -46,7 +47,10 @@ struct fw_filter {
#endif /* CONFIG_NET_CLS_IND */
struct tcf_exts exts;
struct tcf_proto *tp;
- struct rcu_head rcu;
+ union {
+ struct work_struct work;
+ struct rcu_head rcu;
+ };
};
static u32 fw_hash(u32 handle)
@@ -83,9 +87,11 @@ static int fw_classify(struct sk_buff *skb, const struct tcf_proto *tp,
}
}
} else {
+ struct Qdisc *q = tcf_block_q(tp->chain->block);
+
/* Old method: classify the packet using its skb mark. */
if (id && (TC_H_MAJ(id) == 0 ||
- !(TC_H_MAJ(id ^ tp->q->handle)))) {
+ !(TC_H_MAJ(id ^ q->handle)))) {
res->classid = id;
res->class = 0;
return 0;
@@ -119,12 +125,28 @@ static int fw_init(struct tcf_proto *tp)
return 0;
}
+static void __fw_delete_filter(struct fw_filter *f)
+{
+ tcf_exts_destroy(&f->exts);
+ tcf_exts_put_net(&f->exts);
+ kfree(f);
+}
+
+static void fw_delete_filter_work(struct work_struct *work)
+{
+ struct fw_filter *f = container_of(work, struct fw_filter, work);
+
+ rtnl_lock();
+ __fw_delete_filter(f);
+ rtnl_unlock();
+}
+
static void fw_delete_filter(struct rcu_head *head)
{
struct fw_filter *f = container_of(head, struct fw_filter, rcu);
- tcf_exts_destroy(&f->exts);
- kfree(f);
+ INIT_WORK(&f->work, fw_delete_filter_work);
+ tcf_queue_work(&f->work);
}
static void fw_destroy(struct tcf_proto *tp)
@@ -141,7 +163,10 @@ static void fw_destroy(struct tcf_proto *tp)
RCU_INIT_POINTER(head->ht[h],
rtnl_dereference(f->next));
tcf_unbind_filter(tp, &f->res);
- call_rcu(&f->rcu, fw_delete_filter);
+ if (tcf_exts_get_net(&f->exts))
+ call_rcu(&f->rcu, fw_delete_filter);
+ else
+ __fw_delete_filter(f);
}
}
kfree_rcu(head, rcu);
@@ -166,6 +191,7 @@ static int fw_delete(struct tcf_proto *tp, void *arg, bool *last)
if (pfp == f) {
RCU_INIT_POINTER(*fp, rtnl_dereference(f->next));
tcf_unbind_filter(tp, &f->res);
+ tcf_exts_get_net(&f->exts);
call_rcu(&f->rcu, fw_delete_filter);
ret = 0;
break;
@@ -286,6 +312,7 @@ static int fw_change(struct net *net, struct sk_buff *in_skb,
RCU_INIT_POINTER(fnew->next, rtnl_dereference(pfp->next));
rcu_assign_pointer(*fp, fnew);
tcf_unbind_filter(tp, &f->res);
+ tcf_exts_get_net(&f->exts);
call_rcu(&f->rcu, fw_delete_filter);
*arg = fnew;