Re: [PATCH bpf-next 3/6] bpf: implement bpf_link-based cgroup BPF program attachment

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On 03/20, Andrii Nakryiko wrote:
> diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
> index 5d01c5c7e598..fad9f79bb8f1 100644
> --- a/include/uapi/linux/bpf.h
> +++ b/include/uapi/linux/bpf.h
> @@ -111,6 +111,7 @@ enum bpf_cmd {
>  	BPF_MAP_LOOKUP_AND_DELETE_BATCH,
>  	BPF_MAP_UPDATE_BATCH,
>  	BPF_MAP_DELETE_BATCH,
[..]
> +	BPF_LINK_CREATE,
Curious, why did you decide to add new command versus reusing existing
BPF_PROG_ATTACH/BPF_PROG_DETACH pair? Can we have a new flag like
BPF_F_NOT_OWNED that we can set when calling BPF_PROG_ATTACH to trigger
all these new bpf_link properties (like cgroup not holding an extra ref)?



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