diff options
Diffstat (limited to 'net/sched/cls_api.c')
| -rw-r--r-- | net/sched/cls_api.c | 45 |
1 files changed, 32 insertions, 13 deletions
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index 5f0f346b576f..ff1e6b474fef 100644 --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -49,6 +49,23 @@ static LIST_HEAD(tcf_proto_base); /* Protects list of registered TC modules. It is pure SMP lock. */ static DEFINE_RWLOCK(cls_mod_lock); +#ifdef CONFIG_NET_CLS_ACT +DEFINE_STATIC_KEY_FALSE(tc_skb_ext_tc); +EXPORT_SYMBOL(tc_skb_ext_tc); + +void tc_skb_ext_tc_enable(void) +{ + static_branch_inc(&tc_skb_ext_tc); +} +EXPORT_SYMBOL(tc_skb_ext_tc_enable); + +void tc_skb_ext_tc_disable(void) +{ + static_branch_dec(&tc_skb_ext_tc); +} +EXPORT_SYMBOL(tc_skb_ext_tc_disable); +#endif + static u32 destroy_obj_hashfn(const struct tcf_proto *tp) { return jhash_3words(tp->chain->index, tp->prio, @@ -1615,19 +1632,21 @@ int tcf_classify(struct sk_buff *skb, ret = __tcf_classify(skb, tp, orig_tp, res, compat_mode, &last_executed_chain); - /* If we missed on some chain */ - if (ret == TC_ACT_UNSPEC && last_executed_chain) { - struct tc_skb_cb *cb = tc_skb_cb(skb); - - ext = tc_skb_ext_alloc(skb); - if (WARN_ON_ONCE(!ext)) - return TC_ACT_SHOT; - ext->chain = last_executed_chain; - ext->mru = cb->mru; - ext->post_ct = cb->post_ct; - ext->post_ct_snat = cb->post_ct_snat; - ext->post_ct_dnat = cb->post_ct_dnat; - ext->zone = cb->zone; + if (tc_skb_ext_tc_enabled()) { + /* If we missed on some chain */ + if (ret == TC_ACT_UNSPEC && last_executed_chain) { + struct tc_skb_cb *cb = tc_skb_cb(skb); + + ext = tc_skb_ext_alloc(skb); + if (WARN_ON_ONCE(!ext)) + return TC_ACT_SHOT; + ext->chain = last_executed_chain; + ext->mru = cb->mru; + ext->post_ct = cb->post_ct; + ext->post_ct_snat = cb->post_ct_snat; + ext->post_ct_dnat = cb->post_ct_dnat; + ext->zone = cb->zone; + } } return ret; |