netdev - Re: [PATCH net-next v5 2/3] bpf: Add bpf_current_task_under

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Message-ID: <57ADF2F4.9080309@iogearbox.net>
Date:	Fri, 12 Aug 2016 18:01:56 +0200
From:	Daniel Borkmann <daniel@...earbox.net>
To:	Sargun Dhillon <sargun@...gun.me>, netdev@...r.kernel.org
CC:	alexei.starovoitov@...il.com, tj@...nel.org
Subject: Re: [PATCH net-next v5 2/3] bpf: Add bpf_current_task_under_cgroup
 helper

On 08/12/2016 05:56 PM, Sargun Dhillon wrote:
> This adds a bpf helper that's similar to the skb_in_cgroup helper to check
> whether the probe is currently executing in the context of a specific
> subset of the cgroupsv2 hierarchy. It does this based on membership test
> for a cgroup arraymap. It is invalid to call this in an interrupt, and
> it'll return an error. The helper is primarily to be used in debugging
> activities for containers, where you may have multiple programs running in
> a given top-level "container".
>
> Signed-off-by: Sargun Dhillon <sargun@...gun.me>
> Cc: Alexei Starovoitov <ast@...nel.org>
> Cc: Daniel Borkmann <daniel@...earbox.net>
> Cc: Tejun Heo <tj@...nel.org>
> Acked-by: Tejun Heo <tj@...nel.org>
> Acked-by: Alexei Starovoitov <ast@...nel.org>

Looks good, thanks, Sargun!

Acked-by: Daniel Borkmann <daniel@...earbox.net>