linux-kernel - Re: [PATCH] smack: SMACK_MAGIC to include/uapi/linux/magic.h

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Message-ID: <CAMR49LrgTS5rcXmH=040tpQ_8wdaUfY8B1Vgne6qcERLYBieTA@mail.gmail.com>
Date:	Thu, 8 Nov 2012 19:44:02 +0200
From:	Jarkko Sakkinen <jarkko.sakkinen@....fi>
To:	Casey Schaufler <casey@...aufler-ca.com>
Cc:	Eric Paris <eparis@...isplace.org>,
	James Morris <james.l.morris@...cle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	LSM List <linux-security-module@...r.kernel.org>
Subject: Re: [PATCH] smack: SMACK_MAGIC to include/uapi/linux/magic.h

On Thu, Nov 8, 2012 at 7:40 PM, Casey Schaufler <casey@...aufler-ca.com> wrote:
> On 11/8/2012 7:04 AM, Eric Paris wrote:
>> Then it only works by accident that magic.h is included by some random
>> path in smackfs.c.  You really should be including it in smack.h (or
>> each .c file individually, up to casey)
>
> I should think it should go in smack.h

Yeah, that's probably best place for it. I'll add the include there.

>
>> On Thu, Nov 8, 2012 at 5:43 AM, Jarkko Sakkinen <jarkko.sakkinen@....fi> wrote:
>>> On Tue, Nov 6, 2012 at 11:59 PM, Casey Schaufler <casey@...aufler-ca.com> wrote:
>>>> On 11/6/2012 12:17 AM, Jarkko Sakkinen wrote:
>>>>> SMACK_MAGIC moved to a proper place for easy user space access
>>>>> (i.e. libsmack).
>>>>>
>>>>> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@....fi>
>>>>> ---
>>>>>  include/uapi/linux/magic.h |    1 +
>>>>>  security/smack/smack.h     |    5 -----
>>>>>  2 files changed, 1 insertion(+), 5 deletions(-)
>>>> Will security/smack/smack_lsm.c and security/smack/smackfs.c
>>>> compile after this change?
>>> Sorry I haven't replied earlier. Anyway, I made a sanity check.
>>>
>>> I retried build from clean. Works. I also checked that vmlinux contains
>>> SMACK symbols. It does.
>>>
>>>>> diff --git a/include/uapi/linux/magic.h b/include/uapi/linux/magic.h
>>>>> index e15192c..12735ad 100644
>>>>> --- a/include/uapi/linux/magic.h
>>>>> +++ b/include/uapi/linux/magic.h
>>>>> @@ -11,6 +11,7 @@
>>>>>  #define DEBUGFS_MAGIC          0x64626720
>>>>>  #define SECURITYFS_MAGIC     0x73636673
>>>>>  #define SELINUX_MAGIC                0xf97cff8c
>>>>> +#define SMACK_MAGIC          0x43415d53      /* "SMAC" */
>>>>>  #define RAMFS_MAGIC          0x858458f6      /* some random number */
>>>>>  #define TMPFS_MAGIC          0x01021994
>>>>>  #define HUGETLBFS_MAGIC      0x958458f6      /* some random number */
>>>>> diff --git a/security/smack/smack.h b/security/smack/smack.h
>>>>> index 99b3612..8ad3095 100644
>>>>> --- a/security/smack/smack.h
>>>>> +++ b/security/smack/smack.h
>>>>> @@ -149,11 +149,6 @@ struct smack_known {
>>>>>  #define SMACK_CIPSO_SOCKET   1
>>>>>
>>>>>  /*
>>>>> - * smackfs magic number
>>>>> - */
>>>>> -#define SMACK_MAGIC  0x43415d53 /* "SMAC" */
>>>>> -
>>>>> -/*
>>>>>   * CIPSO defaults.
>>>>>   */
>>>>>  #define SMACK_CIPSO_DOI_DEFAULT              3       /* Historical */
>>> /Jarkko
>>> --
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>

/Jarkko
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