[PATCH 18/18] net/sched: cls_bpf: Reflect HW offload status

[Talat Batheesh]

From: Or Gerlitz <ogerlitz at mellanox.com>

BugLink: https://bugs.launchpad.net/ubuntu/1668019

BPF classifier support for the "in hw" offloading flags.

Signed-off-by: Or Gerlitz <ogerlitz at mellanox.com>
Reviewed-by: Amir Vadai <amir at vadai.me>
Acked-by: Jakub Kicinski <jakub.kicinski at netronome.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
(cherry picked from commit 5cecb6cc008148b4afc51f7bacfa753e1a957483)
Signed-off-by: Talat Batheesh <talatb at mellanox.com>
---
 net/sched/cls_bpf.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c
index d9c9701..80f6884 100644
--- a/net/sched/cls_bpf.c
+++ b/net/sched/cls_bpf.c
@@ -148,6 +148,7 @@ static int cls_bpf_offload_cmd(struct tcf_proto *tp, struct cls_bpf_prog *prog,
 	struct net_device *dev = tp->q->dev_queue->dev;
 	struct tc_cls_bpf_offload bpf_offload = {};
 	struct tc_to_netdev offload;
+	int err;
 
 	offload.type = TC_SETUP_CLSBPF;
 	offload.cls_bpf = &bpf_offload;
@@ -159,8 +160,13 @@ static int cls_bpf_offload_cmd(struct tcf_proto *tp, struct cls_bpf_prog *prog,
 	bpf_offload.exts_integrated = prog->exts_integrated;
 	bpf_offload.gen_flags = prog->gen_flags;
 
-	return dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle,
-					     tp->protocol, &offload);
+	err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle,
+					    tp->protocol, &offload);
+
+	if (!err && (cmd == TC_CLSBPF_ADD || cmd == TC_CLSBPF_REPLACE))
+		prog->gen_flags |= TCA_CLS_FLAGS_IN_HW;
+
+	return err;
 }
 
 static int cls_bpf_offload(struct tcf_proto *tp, struct cls_bpf_prog *prog,
@@ -511,6 +517,9 @@ static int cls_bpf_change(struct net *net, struct sk_buff *in_skb,
 		return ret;
 	}
 
+	if (!tc_in_hw(prog->gen_flags))
+		prog->gen_flags |= TCA_CLS_FLAGS_NOT_IN_HW;
+
 	if (oldprog) {
 		list_replace_rcu(&oldprog->link, &prog->link);
 		tcf_unbind_filter(tp, &oldprog->res);
-- 
2.5.0