linux-kernel - RE: [PATCH v3 09/16] SELinux: Abstract use of file security blob

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Message-ID: <124ae3859e8141deb35ed8355370b4ed@AcuMS.aculab.com>
Date:   Thu, 20 Sep 2018 08:51:09 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Casey Schaufler' <casey@...aufler-ca.com>,
        LSM <linux-security-module@...r.kernel.org>,
        James Morris <jmorris@...ei.org>,
        "SE Linux" <selinux@...ho.nsa.gov>,
        LKLM <linux-kernel@...r.kernel.org>,
        "John Johansen" <john.johansen@...onical.com>,
        Kees Cook <keescook@...omium.org>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Paul Moore <paul@...l-moore.com>,
        Stephen Smalley <sds@...ho.nsa.gov>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "Alexey Dobriyan" <adobriyan@...il.com>,
        Mickaël Salaün <mic@...ikod.net>,
        Salvatore Mesoraca <s.mesoraca16@...il.com>
Subject: RE: [PATCH v3 09/16] SELinux: Abstract use of file security blob

From: Casey Schaufler
> Sent: 20 September 2018 01:21
> 
> SELinux: Abstract use of file security blob
> 
> Don't use the file->f_security pointer directly.
> Provide a helper function that provides the security blob pointer.
...
> +static inline struct file_security_struct *selinux_file(const struct file *file)
> +{
> +	return file->f_security;
> +}
> +

Why?

	David

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