From: Oleg Nesterov <oleg@redhat.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Stanislav Kinsbursky <skinsbursky@parallels.com>,
Jeff Layton <jlayton@redhat.com>,
Greg KH <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-nfs@vger.kernel.org, devel@openvz.org,
bfields@fieldses.org, bharrosh@panasas.com
Subject: Re: call_usermodehelper in containers
Date: Mon, 18 Nov 2013 19:02:59 +0100 [thread overview]
Message-ID: <20131118180259.GA11722@redhat.com> (raw)
In-Reply-To: <20131118172844.GA10005@redhat.com>
On 11/18, Oleg Nesterov wrote:
>
> On 11/15, Eric W. Biederman wrote:
> >
> > I don't understand that one. Having a preforked thread with the proper
> > environment that can act like kthreadd in terms of spawning user mode
> > helpers works and is simple.
>
> Can't we ask ->child_reaper to create the non-daemonized kernel thread
> with the "right" ->nsproxy, ->fs, etc?
>
> IOW. Please the the "patch" below. It is obviously incomplete and wrong,
> and it can be more clear/clean. And probably we need another API. Just
> to explain what I mean.
Or, perhaps UMH_IN_MY_NS should only work if ->child_reaper explicitly
does, say, prctl(PR_SPAWN_UMH_IN_NS_HELPER) which forks the non-daemonized
kernel kthread_worker thread, I dunno.
Oleg.
next prev parent reply other threads:[~2013-11-18 18:02 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-11 12:18 call_usermodehelper in containers Jeff Layton
2013-11-11 12:43 ` [Devel] " Vasily Kulikov
2013-11-11 13:26 ` Jeff Layton
2013-11-12 0:47 ` Greg KH
2013-11-12 11:12 ` Jeff Layton
2013-11-12 13:02 ` Stanislav Kinsbursky
2013-11-12 13:30 ` Jeff Layton
2013-11-15 5:05 ` Eric W. Biederman
2013-11-15 10:40 ` Stanislav Kinsbursky
2013-11-15 11:03 ` Eric W. Biederman
2013-11-15 11:54 ` Stanislav Kinsbursky
2016-02-12 23:39 ` Ian Kent
2016-02-13 16:08 ` Stanislav Kinsburskiy
2016-02-15 0:11 ` Ian Kent
[not found] ` <1455495082.2941.32.camel-PKsaG3nR2I+sTnJN9+BGXg@public.gmane.org>
2016-02-18 3:17 ` Eric W. Biederman
2016-02-18 3:17 ` Eric W. Biederman
2013-11-18 17:28 ` Oleg Nesterov
2013-11-18 18:02 ` Oleg Nesterov [this message]
2013-11-19 14:51 ` Jeff Layton
2016-02-11 0:17 ` Ian Kent
[not found] ` <1455149857.2903.9.camel-PKsaG3nR2I+sTnJN9+BGXg@public.gmane.org>
2016-02-18 2:57 ` Eric W. Biederman
2016-02-18 2:57 ` Eric W. Biederman
[not found] ` <8737sq4teb.fsf-JOvCrm2gF+uungPnsOpG7nhyD016LWXt@public.gmane.org>
2016-02-18 3:43 ` Kamezawa Hiroyuki
2016-02-18 3:43 ` Kamezawa Hiroyuki
2016-02-18 6:36 ` Ian Kent
2016-02-18 7:37 ` Ian Kent
[not found] ` <1455781033.2908.5.camel-PKsaG3nR2I+sTnJN9+BGXg@public.gmane.org>
2016-02-18 20:45 ` Eric W. Biederman
2016-02-18 20:45 ` Eric W. Biederman
[not found] ` <87r3g9ychc.fsf-JOvCrm2gF+uungPnsOpG7nhyD016LWXt@public.gmane.org>
2016-02-19 3:08 ` Kamezawa Hiroyuki
2016-02-19 3:08 ` Kamezawa Hiroyuki
2016-02-19 5:37 ` Ian Kent
[not found] ` <1455860260.3356.31.camel-PKsaG3nR2I+sTnJN9+BGXg@public.gmane.org>
2016-02-19 9:30 ` Kamezawa Hiroyuki
2016-02-19 9:30 ` Kamezawa Hiroyuki
[not found] ` <56C6E0A8.3010806-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2016-02-20 3:28 ` Ian Kent
2016-02-20 3:28 ` Ian Kent
[not found] ` <56C68714.2000900-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2016-02-19 5:37 ` Ian Kent
2016-02-19 5:14 ` Ian Kent
2016-02-19 5:14 ` Ian Kent
[not found] ` <1455858850.3356.19.camel-PKsaG3nR2I+sTnJN9+BGXg@public.gmane.org>
2016-02-23 2:55 ` Ian Kent
2016-02-23 2:55 ` Ian Kent
2016-02-23 14:36 ` J. Bruce Fields
[not found] ` <20160223143627.GB31951-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2016-02-24 0:55 ` Ian Kent
2016-02-24 0:55 ` Ian Kent
[not found] ` <1456196130.2911.10.camel-PKsaG3nR2I+sTnJN9+BGXg@public.gmane.org>
2016-02-23 14:36 ` J. Bruce Fields
[not found] ` <1455777387.3188.24.camel-PKsaG3nR2I+sTnJN9+BGXg@public.gmane.org>
2016-02-18 7:37 ` Ian Kent
[not found] ` <56C53DE3.1070108-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2016-02-18 6:36 ` Ian Kent
2016-03-24 7:45 ` Ian Kent
2016-03-25 1:28 ` Oleg Nesterov
2016-03-25 7:25 ` Ian Kent
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=20131118180259.GA11722@redhat.com \
--to=oleg@redhat.com \
--cc=bfields@fieldses.org \
--cc=bharrosh@panasas.com \
--cc=devel@openvz.org \
--cc=ebiederm@xmission.com \
--cc=gregkh@linuxfoundation.org \
--cc=jlayton@redhat.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-nfs@vger.kernel.org \
--cc=skinsbursky@parallels.com \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.