netdev - Re: [PATCH net-next 0/3] bpf: implement bpf_get_current_cgroup

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Message-ID: <2630312d-d5eb-6cc1-e96b-ddb66d81c781@fb.com>
Date:   Sun, 3 Jun 2018 16:03:09 -0700
From:   Yonghong Song <yhs@...com>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
CC:     <ast@...com>, <daniel@...earbox.net>, <netdev@...r.kernel.org>,
        <kernel-team@...com>
Subject: Re: [PATCH net-next 0/3] bpf: implement bpf_get_current_cgroup_id()
 helper



On 6/3/18 1:00 PM, Alexei Starovoitov wrote:
> On Sun, Jun 03, 2018 at 12:36:51AM -0700, Yonghong Song wrote:
>> bpf has been used extensively for tracing. For example, bcc
>> contains an almost full set of bpf-based tools to trace kernel
>> and user functions/events. Most tracing tools are currently
>> either filtered based on pid or system-wide.
>>
>> Containers have been used quite extensively in industry and
>> cgroup is often used together to provide resource isolation
>> and protection. Several processes may run inside the same
>> container. It is often desirable to get container-level tracing
>> results as well, e.g. syscall count, function count, I/O
>> activity, etc.
>>
>> This patch implements a new helper, bpf_get_current_cgroup_id(),
>> which will return cgroup id based on the cgroup within which
>> the current task is running.
>>
>> Patch #1 implements the new helper in the kernel.
>> Patch #2 syncs the uapi bpf.h header and helper between tools
>> and kernel.
>> Patch #3 shows how to get the same cgroup id in user space,
>> so a filter or policy could be configgured in the bpf program
>> based on current task cgroup.
> 
> for all patches:
> Acked-by: Alexei Starovoitov <ast@...nel.org>
> 
> please rebase, so it can be applied and s/net-next/bpf-next/ in subj.

Sorry. Missed to change subject line from "net-next" to "bpf-next".
Do you want to submit another revision?

> Thanks!
>