netdev - [PATCH net-next v3 2/9] net/sched: act_pedit, setup offload action for action stats query

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Message-ID: <20230206135442.15671-3-ozsh@nvidia.com>
Date:   Mon, 6 Feb 2023 15:54:35 +0200
From:   Oz Shlomo <ozsh@...dia.com>
To:     <netdev@...r.kernel.org>
CC:     Saeed Mahameed <saeedm@...dia.com>, Roi Dayan <roid@...dia.com>,
        "Jiri Pirko" <jiri@...dia.com>,
        Marcelo Ricardo Leitner <mleitner@...hat.com>,
        "Simon Horman" <simon.horman@...igine.com>,
        Baowen Zheng <baowen.zheng@...igine.com>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Edward Cree <ecree.xilinx@...il.com>,
        "Oz Shlomo" <ozsh@...dia.com>
Subject: [PATCH  net-next v3 2/9] net/sched: act_pedit, setup offload action for action stats query

A single tc pedit action may be translated to multiple flow_offload
actions.
Offload only actions that translate to a single pedit command value.

Signed-off-by: Oz Shlomo <ozsh@...dia.com>

---
Change log:

V1 -> V2:
    - Add extack message on error
    - Assign the flow action id outside the for loop.
      Ensure the rest of the pedit actions follow the assigned id.

V2 -> V3:
    - Fix last_cmd initialization
---
 net/sched/act_pedit.c | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/net/sched/act_pedit.c b/net/sched/act_pedit.c
index c42fcc47dd6d..924beb76f5b7 100644
--- a/net/sched/act_pedit.c
+++ b/net/sched/act_pedit.c
@@ -545,7 +545,32 @@ static int tcf_pedit_offload_act_setup(struct tc_action *act, void *entry_data,
 		}
 		*index_inc = k;
 	} else {
-		return -EOPNOTSUPP;
+		struct flow_offload_action *fl_action = entry_data;
+		u32 cmd = tcf_pedit_cmd(act, 0);
+		u32 last_cmd;
+		int k;
+
+		switch (cmd) {
+		case TCA_PEDIT_KEY_EX_CMD_SET:
+			fl_action->id = FLOW_ACTION_MANGLE;
+			break;
+		case TCA_PEDIT_KEY_EX_CMD_ADD:
+			fl_action->id = FLOW_ACTION_ADD;
+			break;
+		default:
+			NL_SET_ERR_MSG_MOD(extack, "Unsupported pedit command offload");
+			return -EOPNOTSUPP;
+		}
+
+		for (k = 1; k < tcf_pedit_nkeys(act); k++) {
+			last_cmd = cmd;
+			cmd = tcf_pedit_cmd(act, k);
+
+			if (cmd != last_cmd) {
+				NL_SET_ERR_MSG_MOD(extack, "Unsupported pedit command offload");
+				return -EOPNOTSUPP;
+			}
+		}
 	}
 
 	return 0;
-- 
1.8.3.1