> On Dec 11, 2018, at 7:54 AM, Daniel Borkmann <[email protected]> wrote:
>
> On 12/11/2018 09:18 AM, Song Liu wrote:
>> Changes from v1:
>> 1. Fix error path as Martin suggested.
>>
>> This patch adds nr_prog_tags and prog_tags to bpf_prog_info. This is a
>> reliable way for user space to get tags of all sub programs. Before this
>> patch, user space need to find sub program tags via kallsyms.
>>
>> This feature will be used in BPF introspection, where user space queries
>> information about BPF programs via sys_bpf.
>
> Should bpftool be updated as well to support this facility?
>
> Thanks,
> Daniel
Currently, bpftool gets sub program tags from kallsyms (kernel_syms_load,
kernel_syms_search). So it doesn't need this urgently. In longer term,
we may replace kernel_syms_* functions with information from tag and BTF.
Thanks,
Song
