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| author | Paul Blakey <paulb@mellanox.com> | 2020-03-12 11:23:07 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-03-12 23:00:38 +0100 |
| commit | 30b0cf90c6dd82e7ebb3fcb5ba8447f1baeb80be (patch) | |
| tree | d4feb1ca46338ae92fd747870f9a02e482433dd6 /include/net/tc_act | |
| parent | net/sched: act_ct: Instantiate flow table entry actions (diff) | |
| download | linux-30b0cf90c6dd82e7ebb3fcb5ba8447f1baeb80be.tar.xz linux-30b0cf90c6dd82e7ebb3fcb5ba8447f1baeb80be.zip | |
net/sched: act_ct: Support restoring conntrack info on skbs
Provide an API to restore the ct state pointer.
This may be used by drivers to restore the ct state if they
miss in tc chain after they already did the hardware connection
tracking action (ct_metadata action).
For example, consider the following rule on chain 0 that is in_hw,
however chain 1 is not_in_hw:
$ tc filter add dev ... chain 0 ... \
flower ... action ct pipe action goto chain 1
Packets of a flow offloaded (via nf flow table offload) by the driver
hit this rule in hardware, will be marked with the ct metadata action
(mark, label, zone) that does the equivalent of the software ct action,
and when the packet jumps to hardware chain 1, there would be a miss.
CT was already processed in hardware. Therefore, the driver's miss
handling should restore the ct state on the skb, using the provided API,
and continue the packet processing in chain 1.
Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/tc_act')
| -rw-r--r-- | include/net/tc_act/tc_ct.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/net/tc_act/tc_ct.h b/include/net/tc_act/tc_ct.h index cf3492e2a6a4..735da5912974 100644 --- a/include/net/tc_act/tc_ct.h +++ b/include/net/tc_act/tc_ct.h @@ -55,6 +55,13 @@ static inline uint16_t tcf_ct_zone(const struct tc_action *a) { return 0; } static inline int tcf_ct_action(const struct tc_action *a) { return 0; } #endif /* CONFIG_NF_CONNTRACK */ +#if IS_ENABLED(CONFIG_NET_ACT_CT) +void tcf_ct_flow_table_restore_skb(struct sk_buff *skb, unsigned long cookie); +#else +static inline void +tcf_ct_flow_table_restore_skb(struct sk_buff *skb, unsigned long cookie) { } +#endif + static inline bool is_tcf_ct(const struct tc_action *a) { #if defined(CONFIG_NET_CLS_ACT) && IS_ENABLED(CONFIG_NF_CONNTRACK) |