Re: [PATCH bpf-next v1] bpftool: Add support for querying cgroup_iter link

[Yonghong Song]

On 8/29/22 4:18 PM, Hao Luo wrote:
> Support dumping info of a cgroup_iter link. This includes
> showing the cgroup's id and the order for walking the cgroup
> hierarchy. Example output is as follows:
>
> > bpftool link show
> 1: iter  prog 2  target_name bpf_map
> 2: iter  prog 3  target_name bpf_prog
> 3: iter  prog 12  target_name cgroup  cgroup_id 72  order self_only
>
> > bpftool -p link show
> [{
>          "id": 1,
>          "type": "iter",
>          "prog_id": 2,
>          "target_name": "bpf_map"
>      },{
>          "id": 2,
>          "type": "iter",
>          "prog_id": 3,
>          "target_name": "bpf_prog"
>      },{
>          "id": 3,
>          "type": "iter",
>          "prog_id": 12,
>          "target_name": "cgroup",
>          "cgroup_id": 72,
>          "order": "self_only"
>      }
> ]
>
> Signed-off-by: Hao Luo <haoluo@xxxxxxxxxx>

Acked-by: Yonghong Song <yhs@xxxxxx>