net/sched: add block pointer to tc_cls_common_offload structure

Some actions like the police action are stateful and could share state
between devices. This is incompatible with offloading to multiple devices
and drivers might want to test for shared blocks when offloading.
Store a pointer to the tcf_block structure in the tc_cls_common_offload
structure to allow drivers to determine when offloads apply to a shared
block.

Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
index 161fcf8516ac..eed98f8fcb5e 100644
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -100,6 +100,11 @@ int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 		 struct tcf_result *res, bool compat_mode);
 
 #else
+static inline bool tcf_block_shared(struct tcf_block *block)
+{
+	return false;
+}
+
 static inline
 int tcf_block_get(struct tcf_block **p_block,
 		  struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
@@ -624,6 +629,7 @@ struct tc_cls_common_offload {
 	u32 chain_index;
 	__be16 protocol;
 	u32 prio;
+	struct tcf_block *block;
 	struct netlink_ext_ack *extack;
 };
 
@@ -725,11 +731,13 @@ static inline bool tc_in_hw(u32 flags)
 static inline void
 tc_cls_common_offload_init(struct tc_cls_common_offload *cls_common,
 			   const struct tcf_proto *tp, u32 flags,
+			   struct tcf_block *block,
 			   struct netlink_ext_ack *extack)
 {
 	cls_common->chain_index = tp->chain->index;
 	cls_common->protocol = tp->protocol;
 	cls_common->prio = tp->prio;
+	cls_common->block = block;
 	if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
 		cls_common->extack = extack;
 }