From: Tejun Heo <tj@kernel.org>
To: Daniel Borkmann <daniel@iogearbox.net>
Cc: Martin KaFai Lau <kafai@fb.com>,
cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, Alexei Starovoitov <ast@fb.com>,
kernel-team@fb.com
Subject: Re: [PATCH net-next v2 2/4] cgroup: bpf: Add BPF_MAP_TYPE_CGROUP_ARRAY
Date: Thu, 23 Jun 2016 17:13:26 -0400 [thread overview]
Message-ID: <20160623211326.GK3262@mtj.duckdns.org> (raw)
In-Reply-To: <576BAF07.4020302@iogearbox.net>
Hello,
On Thu, Jun 23, 2016 at 11:42:31AM +0200, Daniel Borkmann wrote:
> I presume it's a valid use case to pin a cgroup map, put fds into it and
> remove the pinned file expecting to continue to match on it, right? So
> lifetime is really until last prog using a cgroup map somewhere gets removed
> (even if not accessible from user space anymore, meaning no prog has fd and
> pinned file was removed).
Yeap, from what I can see, the cgroup will stay around (even if it
gets deleted) as long as the bpf rule using it is around and that's
completely fine from cgroup side.
Thanks.
--
tejun
next prev parent reply other threads:[~2016-06-23 21:13 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-22 21:17 [PATCH net-next v2 0/4] cgroup: bpf: cgroup2 membership test on skb Martin KaFai Lau
2016-06-22 21:17 ` [PATCH net-next v2 1/4] cgroup: Add cgroup_get_from_fd Martin KaFai Lau
2016-06-23 21:11 ` Tejun Heo
2016-06-22 21:17 ` [PATCH net-next v2 2/4] cgroup: bpf: Add BPF_MAP_TYPE_CGROUP_ARRAY Martin KaFai Lau
2016-06-23 9:42 ` Daniel Borkmann
2016-06-23 21:13 ` Tejun Heo [this message]
2016-06-23 21:33 ` Daniel Borkmann
2016-06-23 21:26 ` Martin KaFai Lau
2016-06-23 21:50 ` Daniel Borkmann
2016-06-23 22:10 ` Martin KaFai Lau
2016-06-22 21:17 ` [PATCH net-next v2 3/4] cgroup: bpf: Add bpf_skb_in_cgroup_proto Martin KaFai Lau
2016-06-23 9:53 ` Daniel Borkmann
2016-06-23 16:54 ` Martin KaFai Lau
2016-06-23 20:07 ` Daniel Borkmann
2016-06-23 21:41 ` Martin KaFai Lau
2016-06-29 14:36 ` kbuild test robot
2016-06-22 21:17 ` [PATCH net-next v2 4/4] cgroup: bpf: Add an example to do cgroup checking in BPF Martin KaFai Lau
2016-06-23 9:58 ` Daniel Borkmann
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20160623211326.GK3262@mtj.duckdns.org \
--to=tj@kernel.org \
--cc=ast@fb.com \
--cc=cgroups@vger.kernel.org \
--cc=daniel@iogearbox.net \
--cc=kafai@fb.com \
--cc=kernel-team@fb.com \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox