diff mbox

[net-next] net/sched: flower: Return error when hw can't offload and skip_sw is set

Message ID 20160613090639.31110-1-amir@vadai.me
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Amir Vadai June 13, 2016, 9:06 a.m. UTC 
From: Amir Vadai <amirva@mellanox.com>

When skip_sw is set and hardware fails to apply filter, return error to
user. This will make error propagation logic similar to the one
currently used in u32 classifier.
Also, changed code to use tc_skip_sw() utility function.

Signed-off-by: Amir Vadai <amirva@mellanox.com>
---
 net/sched/cls_flower.c | 42 +++++++++++++++++++++++++-----------------
 1 file changed, 25 insertions(+), 17 deletions(-)

Comments

Jiri Pirko June 13, 2016, 12:26 p.m. UTC | #1 
Mon, Jun 13, 2016 at 11:06:39AM CEST, amir@vadai.me wrote:
>From: Amir Vadai <amirva@mellanox.com>
>
>When skip_sw is set and hardware fails to apply filter, return error to
>user. This will make error propagation logic similar to the one
>currently used in u32 classifier.
>Also, changed code to use tc_skip_sw() utility function.
>
>Signed-off-by: Amir Vadai <amirva@mellanox.com>

Acked-by: Jiri Pirko <jiri@mellanox.com>
David Miller June 15, 2016, 5:30 a.m. UTC | #2 
From: Amir Vadai <amir@vadai.me>
Date: Mon, 13 Jun 2016 12:06:39 +0300

> From: Amir Vadai <amirva@mellanox.com>
> 
> When skip_sw is set and hardware fails to apply filter, return error to
> user. This will make error propagation logic similar to the one
> currently used in u32 classifier.
> Also, changed code to use tc_skip_sw() utility function.
> 
> Signed-off-by: Amir Vadai <amirva@mellanox.com>

Applied, thanks.
diff mbox

Patch

diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 1ea6f76..5060801 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -140,7 +140,7 @@  static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 	f = rhashtable_lookup_fast(&head->ht,
 				   fl_key_get_start(&skb_mkey, &head->mask),
 				   head->ht_params);
-	if (f && !(f->flags & TCA_CLS_FLAGS_SKIP_SW)) {
+	if (f && !tc_skip_sw(f->flags)) {
 		*res = f->res;
 		return tcf_exts_exec(skb, &f->exts, res);
 	}
@@ -187,19 +187,20 @@  static void fl_hw_destroy_filter(struct tcf_proto *tp, unsigned long cookie)
 	dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, &tc);
 }
 
-static void fl_hw_replace_filter(struct tcf_proto *tp,
-				 struct flow_dissector *dissector,
-				 struct fl_flow_key *mask,
-				 struct fl_flow_key *key,
-				 struct tcf_exts *actions,
-				 unsigned long cookie, u32 flags)
+static int fl_hw_replace_filter(struct tcf_proto *tp,
+				struct flow_dissector *dissector,
+				struct fl_flow_key *mask,
+				struct fl_flow_key *key,
+				struct tcf_exts *actions,
+				unsigned long cookie, u32 flags)
 {
 	struct net_device *dev = tp->q->dev_queue->dev;
 	struct tc_cls_flower_offload offload = {0};
 	struct tc_to_netdev tc;
+	int err;
 
 	if (!tc_should_offload(dev, tp, flags))
-		return;
+		return tc_skip_sw(flags) ? -EINVAL : 0;
 
 	offload.command = TC_CLSFLOWER_REPLACE;
 	offload.cookie = cookie;
@@ -211,7 +212,12 @@  static void fl_hw_replace_filter(struct tcf_proto *tp,
 	tc.type = TC_SETUP_CLSFLOWER;
 	tc.cls_flower = &offload;
 
-	dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, &tc);
+	err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, &tc);
+
+	if (tc_skip_sw(flags))
+		return err;
+
+	return 0;
 }
 
 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
@@ -572,20 +578,22 @@  static int fl_change(struct net *net, struct sk_buff *in_skb,
 	if (err)
 		goto errout;
 
-	if (!(fnew->flags & TCA_CLS_FLAGS_SKIP_SW)) {
+	if (!tc_skip_sw(fnew->flags)) {
 		err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
 					     head->ht_params);
 		if (err)
 			goto errout;
 	}
 
-	fl_hw_replace_filter(tp,
-			     &head->dissector,
-			     &mask.key,
-			     &fnew->key,
-			     &fnew->exts,
-			     (unsigned long)fnew,
-			     fnew->flags);
+	err = fl_hw_replace_filter(tp,
+				   &head->dissector,
+				   &mask.key,
+				   &fnew->key,
+				   &fnew->exts,
+				   (unsigned long)fnew,
+				   fnew->flags);
+	if (err)
+		goto errout;
 
 	if (fold) {
 		rhashtable_remove_fast(&head->ht, &fold->ht_node,