From c129412f74e99b609f0a8e95fc3915af1fd40f34 Mon Sep 17 00:00:00 2001 From: wenxu Date: Wed, 25 Nov 2020 12:01:23 +0800 Subject: net/sched: sch_frag: add generic packet fragment support. Currently kernel tc subsystem can do conntrack in cat_ct. But when several fragment packets go through the act_ct, function tcf_ct_handle_fragments will defrag the packets to a big one. But the last action will redirect mirred to a device which maybe lead the reassembly big packet over the mtu of target device. This patch add support for a xmit hook to mirred, that gets executed before xmiting the packet. Then, when act_ct gets loaded, it configs that hook. The frag xmit hook maybe reused by other modules. Signed-off-by: wenxu Acked-by: Cong Wang Acked-by: Jamal Hadi Salim Signed-off-by: Jakub Kicinski --- include/net/act_api.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/net/act_api.h') diff --git a/include/net/act_api.h b/include/net/act_api.h index 87214927314a..55dab604861f 100644 --- a/include/net/act_api.h +++ b/include/net/act_api.h @@ -239,6 +239,12 @@ int tcf_action_check_ctrlact(int action, struct tcf_proto *tp, struct netlink_ext_ack *newchain); struct tcf_chain *tcf_action_set_ctrlact(struct tc_action *a, int action, struct tcf_chain *newchain); + +#ifdef CONFIG_INET +DECLARE_STATIC_KEY_FALSE(tcf_frag_xmit_count); +#endif + +int tcf_dev_queue_xmit(struct sk_buff *skb, int (*xmit)(struct sk_buff *skb)); #endif /* CONFIG_NET_CLS_ACT */ static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes, -- cgit v1.2.3-59-g8ed1b