netdev - [PATCH v2 net-next 8/9] bpf: nfp: Report bpf_prog ID during XDP_QUERY

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Date:   Tue, 13 Jun 2017 14:08:40 -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>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH v2 net-next 8/9] bpf: nfp: Report bpf_prog ID during XDP_QUERY_PROG

Add support to nfp to report bpf_prog ID during XDP_QUERY_PROG.

Signed-off-by: Martin KaFai Lau <kafai@...com>
Cc: Jakub Kicinski <jakub.kicinski@...ronome.com>
Acked-by: Alexei Starovoitov <ast@...com>
Acked-by: Daniel Borkmann <daniel@...earbox.net>
---
 drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 49d1756d6a8e..272354fb0f13 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -3254,9 +3254,19 @@ static int nfp_net_xdp(struct net_device *netdev, struct netdev_xdp *xdp)
 	switch (xdp->command) {
 	case XDP_SETUP_PROG:
 		return nfp_net_xdp_setup(nn, xdp);
-	case XDP_QUERY_PROG:
-		xdp->prog_attached = !!nn->dp.xdp_prog;
+	case XDP_QUERY_PROG: {
+		const struct bpf_prog *xdp_prog;
+
+		xdp_prog = nn->dp.xdp_prog;
+		if (xdp_prog) {
+			xdp->prog_id = xdp_prog->aux->id;
+			xdp->prog_attached = true;
+		} else {
+			xdp->prog_id = 0;
+			xdp->prog_attached = false;
+		}
 		return 0;
+	}
 	default:
 		return -EINVAL;
 	}
-- 
2.9.3