netdev - [PATCH iproute2 net-next] bpf: Add support for IFLA_XDP_PROG

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Date:   Wed, 21 Jun 2017 14:29:42 -0700
From:   Martin KaFai Lau <kafai@...com>
To:     <stephen@...workplumber.org>
CC:     Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...com>, <davem@...emloft.net>,
        <netdev@...r.kernel.org>
Subject: [PATCH iproute2 net-next] bpf: Add support for IFLA_XDP_PROG_ID

This patch adds support to the newly added IFLA_XDP_PROG_ID.

./ip link show dev eth0
3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdpgeneric/id:2 qdisc [...]

Signed-off-by: Martin KaFai Lau <kafai@...com>
---
 include/linux/if_link.h |  1 +
 ip/iplink_xdp.c         | 12 +++++++++---
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index a536a24b1c28..75e6824094e3 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -905,6 +905,7 @@ enum {
 	IFLA_XDP_FD,
 	IFLA_XDP_ATTACHED,
 	IFLA_XDP_FLAGS,
+	IFLA_XDP_PROG_ID,
 	__IFLA_XDP_MAX,
 };
 
diff --git a/ip/iplink_xdp.c b/ip/iplink_xdp.c
index 98503fab7d3c..4857f50c80de 100644
--- a/ip/iplink_xdp.c
+++ b/ip/iplink_xdp.c
@@ -90,9 +90,15 @@ void xdp_dump(FILE *fp, struct rtattr *xdp)
 	if (mode == XDP_ATTACHED_NONE)
 		return;
 	else if (mode == XDP_ATTACHED_DRV)
-		fprintf(fp, "xdp ");
+		fprintf(fp, "xdp");
 	else if (mode == XDP_ATTACHED_SKB)
-		fprintf(fp, "xdpgeneric ");
+		fprintf(fp, "xdpgeneric");
 	else
-		fprintf(fp, "xdp[%u] ", mode);
+		fprintf(fp, "xdp[%u]", mode);
+
+	if (tb[IFLA_XDP_PROG_ID])
+		fprintf(fp, "/id:%u",
+			rta_getattr_u32(tb[IFLA_XDP_PROG_ID]));
+
+	fprintf(fp, " ");
 }
-- 
2.9.3