On Thu, Aug 20, 2020 at 3:50 PM Yonghong Song <yhs@xxxxxx> wrote:
>
> The link query for bpf iterators is implemented.
> Besides being shown to the user what bpf iterator
> the link represents, the target_name is also used
> to filter out what additional information should be
> printed out, e.g., whether map_id should be shown or not.
> The following is an example of bpf_iter link dump,
> plain output or pretty output.
>
> $ bpftool link show
> 11: iter prog 59 target_name task
> pids test_progs(1749)
> 34: iter prog 173 target_name bpf_map_elem map_id 127
> pids test_progs_1(1753)
> $ bpftool -p link show
> [{
> "id": 11,
> "type": "iter",
> "prog_id": 59,
> "target_name": "task",
> "pids": [{
> "pid": 1749,
> "comm": "test_progs"
> }
> ]
> },{
> "id": 34,
> "type": "iter",
> "prog_id": 173,
> "target_name": "bpf_map_elem",
> "map_id": 127,
> "pids": [{
> "pid": 1753,
> "comm": "test_progs_1"
> }
> ]
> }
> ]
>
> Signed-off-by: Yonghong Song <yhs@xxxxxx>
> ---
LGTM.
Acked-by: Andrii Nakryiko <andriin@xxxxxx>
> tools/bpf/bpftool/link.c | 44 +++++++++++++++++++++++++++++++++++++---
> 1 file changed, 41 insertions(+), 3 deletions(-)
>
[...]
