linux-kernel - Re: [PATCH] audit: Rename enum audit_state constants to avoid AUDIT

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Message-ID: <79d5bffd63b46bb7d54ebcef4765cfca28f76ff0.camel@yandex.ru>
Date:   Mon, 07 Jun 2021 12:58:13 +0300
From:   Sergey Nazarov <s-nazarov@...dex.ru>
To:     Paul Moore <paul@...l-moore.com>
Cc:     linux-kernel@...r.kernel.org, linux-audit@...hat.com,
        Eric Paris <eparis@...hat.com>
Subject: Re: [PATCH] audit: Rename enum audit_state constants to avoid
 AUDIT_DISABLED redefinition

Hi, Paul!
I think this could be easer. It's enouth to rename AUDIT_DISABLE only.
enum audit_state deals with per-task syscalls audit context, so we can
use AUDIT_CONTEXT_DISABLED for example. If it's okay, I can send a new
patch version.

В Сб, 05/06/2021 в 22:40 -0400, Paul Moore пишет:
> On Fri, Jun 4, 2021 at 7:21 AM Sergey Nazarov <s-nazarov@...dex.ru>
> wrote:
> > 
> > AUDIT_DISABLED defined in kernel/audit.h as element of enum
> > audit_state
> > and redefined in kernel/audit.c. This produces a warning when
> > kernel builds
> > with syscalls audit disabled and brokes kernel build if -Werror
> > used.
> > enum audit_state used in syscall audit code only. This patch
> > changes
> > enum audit_state constants prefix AUDIT to AUDITSC to avoid
> > AUDIT_DISABLED
> > redefinition.
> > 
> > Signed-off-by: Sergey Nazarov <s-nazarov@...dex.ru>
> > ---
> >  kernel/audit.h   |  8 ++++----
> >  kernel/auditsc.c | 34 +++++++++++++++++-----------------
> >  2 files changed, 21 insertions(+), 21 deletions(-)
> 
> Hi Sergey,
> 
> Thanks for sending a patch to fix this problem.  One comment below
> ...
> 
> > diff --git a/kernel/audit.h b/kernel/audit.h
> > index 1522e10..ee81f20 100644
> > --- a/kernel/audit.h
> > +++ b/kernel/audit.h
> > @@ -21,16 +21,16 @@
> >     a per-task filter.  At syscall entry, the audit_state is
> > augmented by
> >     the syscall filter. */
> >  enum audit_state {
> > -       AUDIT_DISABLED,         /* Do not create per-task
> > audit_context.
> > +       AUDITSC_DISABLED,       /* Do not create per-task
> > audit_context.
> >                                  * No syscall-specific audit
> > records can
> >                                  * be generated. */
> > -       AUDIT_BUILD_CONTEXT,    /* Create the per-task
> > audit_context,
> > +       AUDITSC_BUILD_CONTEXT,  /* Create the per-task
> > audit_context,
> >                                  * and fill it in at syscall
> >                                  * entry time.  This makes a full
> >                                  * syscall record available if some
> >                                  * other part of the kernel decides
> > it
> >                                  * should be recorded. */
> > -       AUDIT_RECORD_CONTEXT    /* Create the per-task
> > audit_context,
> > +       AUDITSC_RECORD_CONTEXT  /* Create the per-task
> > audit_context,
> >                                  * always fill it in at syscall
> > entry
> >                                  * time, and always write out the
> > audit
> >                                  * record at syscall exit time.  */
> 
> I believe that just as the AUDIT_ prefix proved to be a bit too
> generic, I think that the AUDITSC_ prefix is also not the best
> choice.
> Would you object to using the AUDIT_STATE_ prefix?  As that may get a
> bit long, I might suggest dropping the _CONTEXT from the enums too
> such that you would end up with the following:
> 
>   enum audit_state {
>     AUDIT_STATE_DISABLED,
>     AUDIT_STATE_BUILD,
>     AUDIT_STATE_RECORD,
>   };
> 
> Thoughts?
>