netdev - [PATCH net-next 05/10] bpf: bnxt: Report bpf_prog ID during XDP_QUERY

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Message-ID: <20170613010025.2983342-6-kafai@fb.com>
Date:   Mon, 12 Jun 2017 18:00:20 -0700
From:   Martin KaFai Lau <kafai@...com>
To:     <netdev@...r.kernel.org>
CC:     Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>, <kernel-team@...com>,
        Michael Chan <michael.chan@...adcom.com>
Subject: [PATCH net-next 05/10] bpf: bnxt: Report bpf_prog ID during XDP_QUERY_PROG

Add support to bnxt to report bpf_prog ID during XDP_QUERY_PROG.

Signed-off-by: Martin KaFai Lau <kafai@...com>
Cc: Michael Chan <michael.chan@...adcom.com>
Acked-by: Alexei Starovoitov <ast@...com>
Acked-by: Daniel Borkmann <daniel@...earbox.net>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
index 8ce793a0d030..5bf1c7ddb378 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
@@ -216,10 +216,17 @@ int bnxt_xdp(struct net_device *dev, struct netdev_xdp *xdp)
 	case XDP_SETUP_PROG:
 		rc = bnxt_xdp_set(bp, xdp->prog);
 		break;
-	case XDP_QUERY_PROG:
-		xdp->prog_attached = !!bp->xdp_prog;
+	case XDP_QUERY_PROG: {
+		const struct bpf_prog *xdp_prog;
+
+		xdp_prog = READ_ONCE(bp->xdp_prog);
+		if (xdp_prog)
+			xdp->prog_id = xdp_prog->aux->id;
+		else
+			xdp->prog_id = 0;
 		rc = 0;
 		break;
+	}
 	default:
 		rc = -EINVAL;
 		break;
-- 
2.9.3