netdev - [PATCH net-next 01/13] net/sched: add sample action to the hardware intermediate representation

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Date:   Sat,  4 May 2019 04:46:16 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, oss-drivers@...ronome.com,
        jiri@...nulli.us, xiyou.wangcong@...il.com, idosch@...lanox.com,
        f.fainelli@...il.com, andrew@...n.ch, vivien.didelot@...il.com,
        gerlitz.or@...il.com, simon.horman@...ronome.com,
        Pieter Jansen van Vuuren 
        <pieter.jansenvanvuuren@...ronome.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH net-next 01/13] net/sched: add sample action to the hardware intermediate representation

From: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@...ronome.com>

Add sample action to the hardware intermediate representation model which
would subsequently allow it to be used by drivers for offload.

Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@...ronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
---
 include/net/flow_offload.h | 7 +++++++
 net/sched/cls_api.c        | 8 ++++++++
 2 files changed, 15 insertions(+)

diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index d035183c8d03..9a6c89b2c2bb 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -118,6 +118,7 @@ enum flow_action_id {
 	FLOW_ACTION_MARK,
 	FLOW_ACTION_WAKE,
 	FLOW_ACTION_QUEUE,
+	FLOW_ACTION_SAMPLE,
 };
 
 /* This is mirroring enum pedit_header_type definition for easy mapping between
@@ -157,6 +158,12 @@ struct flow_action_entry {
 			u32		index;
 			u8		vf;
 		} queue;
+		struct {				/* FLOW_ACTION_SAMPLE */
+			struct psample_group	*psample_group;
+			u32			rate;
+			u32			trunc_size;
+			bool			truncate;
+		} sample;
 	};
 };
 
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 263c2ec082c9..f8ee2d78654a 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -37,6 +37,7 @@
 #include <net/tc_act/tc_tunnel_key.h>
 #include <net/tc_act/tc_csum.h>
 #include <net/tc_act/tc_gact.h>
+#include <net/tc_act/tc_sample.h>
 #include <net/tc_act/tc_skbedit.h>
 
 extern const struct nla_policy rtm_tca_policy[TCA_MAX + 1];
@@ -3257,6 +3258,13 @@ int tc_setup_flow_action(struct flow_action *flow_action,
 		} else if (is_tcf_skbedit_mark(act)) {
 			entry->id = FLOW_ACTION_MARK;
 			entry->mark = tcf_skbedit_mark(act);
+		} else if (is_tcf_sample(act)) {
+			entry->id = FLOW_ACTION_SAMPLE;
+			entry->sample.psample_group =
+				tcf_sample_psample_group(act);
+			entry->sample.trunc_size = tcf_sample_trunc_size(act);
+			entry->sample.truncate = tcf_sample_truncate(act);
+			entry->sample.rate = tcf_sample_rate(act);
 		} else {
 			goto err_out;
 		}
-- 
2.21.0