From 053bbf9bff58864be880d7e9a5af586793dbb7de Mon Sep 17 00:00:00 2001 From: Daniel Borkmann Date: Wed, 16 Aug 2023 11:56:51 +0200 Subject: bpftool: Implement link show support for xdp Add support to dump XDP link information to bpftool. This reuses the recently added show_link_ifindex_{plain,json}(). The XDP link info only exposes the ifindex. Below shows an example link dump output, and a cgroup link is included for comparison, too: # bpftool link [...] 10: cgroup prog 2466 cgroup_id 1 attach_type cgroup_inet6_post_bind [...] 16: xdp prog 2477 ifindex enp5s0(3) [...] Equivalent json output: # bpftool link --json [...] { "id": 10, "type": "cgroup", "prog_id": 2466, "cgroup_id": 1, "attach_type": "cgroup_inet6_post_bind" }, [...] { "id": 16, "type": "xdp", "prog_id": 2477, "devname": "enp5s0", "ifindex": 3 } [...] Signed-off-by: Daniel Borkmann Reviewed-by: Quentin Monnet Link: https://lore.kernel.org/r/20230816095651.10014-2-daniel@iogearbox.net Signed-off-by: Martin KaFai Lau --- tools/bpf/bpftool/link.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'tools/bpf') diff --git a/tools/bpf/bpftool/link.c b/tools/bpf/bpftool/link.c index a3774594f154..0b214f6ab5c8 100644 --- a/tools/bpf/bpftool/link.c +++ b/tools/bpf/bpftool/link.c @@ -449,6 +449,9 @@ static int show_link_close_json(int fd, struct bpf_link_info *info) show_link_ifindex_json(info->tcx.ifindex, json_wtr); show_link_attach_type_json(info->tcx.attach_type, json_wtr); break; + case BPF_LINK_TYPE_XDP: + show_link_ifindex_json(info->xdp.ifindex, json_wtr); + break; case BPF_LINK_TYPE_STRUCT_OPS: jsonw_uint_field(json_wtr, "map_id", info->struct_ops.map_id); @@ -782,6 +785,10 @@ static int show_link_close_plain(int fd, struct bpf_link_info *info) show_link_ifindex_plain(info->tcx.ifindex); show_link_attach_type_plain(info->tcx.attach_type); break; + case BPF_LINK_TYPE_XDP: + printf("\n\t"); + show_link_ifindex_plain(info->xdp.ifindex); + break; case BPF_LINK_TYPE_KPROBE_MULTI: show_kprobe_multi_plain(info); break; -- cgit v1.2.3