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

[Martin KaFai Lau]

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 <ka...@fb.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