diff options
| author | wenxu <wenxu@ucloud.cn> | 2020-11-25 07:01:23 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-11-28 01:36:02 +0300 |
| commit | c129412f74e99b609f0a8e95fc3915af1fd40f34 (patch) | |
| tree | 05c6360e02fed40ef5dd599c1974414b639cb7e7 /net/sched/act_api.c | |
| parent | fa6d639930ee5cd3f932cc314f3407f07a06582d (diff) | |
| download | linux-c129412f74e99b609f0a8e95fc3915af1fd40f34.tar.xz | |
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 <wenxu@ucloud.cn>
Acked-by: Cong Wang <cong.wang@bytedance.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/sched/act_api.c')
| -rw-r--r-- | net/sched/act_api.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/net/sched/act_api.c b/net/sched/act_api.c index 99db1c77426b..2e85b636b27b 100644 --- a/net/sched/act_api.c +++ b/net/sched/act_api.c @@ -22,6 +22,22 @@ #include <net/act_api.h> #include <net/netlink.h> +#ifdef CONFIG_INET +DEFINE_STATIC_KEY_FALSE(tcf_frag_xmit_count); +EXPORT_SYMBOL_GPL(tcf_frag_xmit_count); +#endif + +int tcf_dev_queue_xmit(struct sk_buff *skb, int (*xmit)(struct sk_buff *skb)) +{ +#ifdef CONFIG_INET + if (static_branch_unlikely(&tcf_frag_xmit_count)) + return sch_frag_xmit_hook(skb, xmit); +#endif + + return xmit(skb); +} +EXPORT_SYMBOL_GPL(tcf_dev_queue_xmit); + static void tcf_action_goto_chain_exec(const struct tc_action *a, struct tcf_result *res) { |