linux-kernel - Re: [PATCH ghak90 V8 07/16] audit: add contid support for signalling the audit daemon

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Message-ID: <CAHC9VhR84aN72yNB_j61zZgrQV1y6yvrBLNY7jp7BqQiEDL+cw@mail.gmail.com>
Date:   Mon, 23 Mar 2020 20:16:38 -0400
From:   Paul Moore <paul@...l-moore.com>
To:     Richard Guy Briggs <rgb@...hat.com>
Cc:     Steve Grubb <sgrubb@...hat.com>, linux-audit@...hat.com,
        nhorman@...driver.com, linux-api@...r.kernel.org,
        containers@...ts.linux-foundation.org,
        LKML <linux-kernel@...r.kernel.org>, dhowells@...hat.com,
        netfilter-devel@...r.kernel.org, ebiederm@...ssion.com,
        simo@...hat.com, netdev@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, Eric Paris <eparis@...isplace.org>,
        mpatel@...hat.com, Serge Hallyn <serge@...lyn.com>
Subject: Re: [PATCH ghak90 V8 07/16] audit: add contid support for signalling
 the audit daemon

On Thu, Mar 19, 2020 at 6:03 PM Richard Guy Briggs <rgb@...hat.com> wrote:
> On 2020-03-18 18:06, Paul Moore wrote:

...

> > I hope we can do better than string manipulations in the kernel.  I'd
> > much rather defer generating the ACID list (if possible), than
> > generating a list only to keep copying and editing it as the record is
> > sent.
>
> At the moment we are stuck with a string-only format.

Yes, we are.  That is another topic, and another set of changes I've
been deferring so as to not disrupt the audit container ID work.

I was thinking of what we do inside the kernel between when the record
triggering event happens and when we actually emit the record to
userspace.  Perhaps we collect the ACID information while the event is
occurring, but we defer generating the record until later when we have
a better understanding of what should be included in the ACID list.
It is somewhat similar (but obviously different) to what we do for
PATH records (we collect the pathname info when the path is being
resolved).

-- 
paul moore
www.paul-moore.com