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SubjectRe: [PATCH resend] define convenient securebits masks for prctl users
Hi Serge,

On Wed, 28 Oct 2009 09:02:36 -0500 "Serge E. Hallyn" <serue@us.ibm.com> wrote:
>
> [ Are there any objections to exporting securebits.h? If not,
> can this patch be pushed to linux-next? ]

I am not sure which tree this belongs in? Maybe security-testing (James
cc'd)?

> diff --git a/include/linux/securebits.h b/include/linux/securebits.h
> index d2c5ed8..9ad109e 100644
> --- a/include/linux/securebits.h
> +++ b/include/linux/securebits.h
> @@ -1,6 +1,13 @@
> #ifndef _LINUX_SECUREBITS_H
> #define _LINUX_SECUREBITS_H 1
>
> +/* Each securesetting is implemented using two bits. One bit specifies
> + whether the setting is on or off. The other bit specify whether the
> + setting is locked or not. A setting which is locked cannot be
> + changed from user-level. */
> +#define issecure_mask(X) (1 << (X))
> +#define issecure(X) (issecure_mask(X) & current_cred_xxx(securebits))

You want this second define protected by ifdef __KERNEL__ ...

--
Cheers,
Stephen Rothwell sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/
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