bpftool: Add link dump support for BPF_LINK_TYPE_SOCKMAP
An example output looks like: $ bpftool link 1776: sk_skb prog 49730 map_id 0 attach_type sk_skb_verdict pids test_progs(8424) 1777: sk_skb prog 49755 map_id 0 attach_type sk_skb_stream_verdict pids test_progs(8424) 1778: sk_msg prog 49770 map_id 8208 attach_type sk_msg_verdict pids test_progs(8424) Reviewed-by: John Fastabend <john.fastabend@gmail.com> Reviewed-by: Quentin Monnet <qmo@kernel.org> Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20240410043537.3737928-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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@ -526,6 +526,10 @@ static int show_link_close_json(int fd, struct bpf_link_info *info)
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show_link_ifindex_json(info->netkit.ifindex, json_wtr);
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show_link_attach_type_json(info->netkit.attach_type, json_wtr);
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break;
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case BPF_LINK_TYPE_SOCKMAP:
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jsonw_uint_field(json_wtr, "map_id", info->sockmap.map_id);
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show_link_attach_type_json(info->sockmap.attach_type, json_wtr);
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break;
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case BPF_LINK_TYPE_XDP:
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show_link_ifindex_json(info->xdp.ifindex, json_wtr);
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break;
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@ -915,6 +919,11 @@ static int show_link_close_plain(int fd, struct bpf_link_info *info)
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show_link_ifindex_plain(info->netkit.ifindex);
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show_link_attach_type_plain(info->netkit.attach_type);
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break;
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case BPF_LINK_TYPE_SOCKMAP:
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printf("\n\t");
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printf("map_id %u ", info->sockmap.map_id);
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show_link_attach_type_plain(info->sockmap.attach_type);
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break;
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case BPF_LINK_TYPE_XDP:
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printf("\n\t");
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show_link_ifindex_plain(info->xdp.ifindex);
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