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SubjectRe: [PATCH] selinux: add selinux_status_get_seq() function
On Wed, Apr 12, 2017 at 5:12 AM, Sebastien Buisson
<sbuisson.ddn@gmail.com> wrote:
> Add selinux_status_get_seq() function to give access to sequence
> number of current SELinux policy loaded to the rest of the kernel.
>
> Signed-off-by: Sebastien Buisson <sbuisson@ddn.com>
> ---
> include/linux/selinux.h | 7 +++++++
> security/selinux/ss/status.c | 21 +++++++++++++++++++++
> 2 files changed, 28 insertions(+)

See my comments on your other patch, they apply here as well.

> diff --git a/include/linux/selinux.h b/include/linux/selinux.h
> index 44f4596..926f9f0 100644
> --- a/include/linux/selinux.h
> +++ b/include/linux/selinux.h
> @@ -24,12 +24,19 @@
> * selinux_is_enabled - is SELinux enabled?
> */
> bool selinux_is_enabled(void);
> +u32 selinux_status_get_seq(void);
> #else
>
> static inline bool selinux_is_enabled(void)
> {
> return false;
> }
> +
> +static inline u32 selinux_status_get_seq(void)
> +{
> + return 0;
> +}
> +
> #endif /* CONFIG_SECURITY_SELINUX */
>
> #endif /* _LINUX_SELINUX_H */
> diff --git a/security/selinux/ss/status.c b/security/selinux/ss/status.c
> index d982365..a0670d3 100644
> --- a/security/selinux/ss/status.c
> +++ b/security/selinux/ss/status.c
> @@ -124,3 +124,24 @@ void selinux_status_update_policyload(int seqno)
> }
> mutex_unlock(&selinux_status_lock);
> }
> +
> +/*
> + * selinux_status_get_seq
> + *
> + * It gets current sequence of policy loaded.
> + */
> +u32 selinux_status_get_seq(void)
> +{
> + struct selinux_kernel_status *status;
> + u32 seq = 0;
> +
> + mutex_lock(&selinux_status_lock);
> + if (selinux_status_page) {
> + status = page_address(selinux_status_page);
> + seq = status->sequence;
> + }
> + mutex_unlock(&selinux_status_lock);
> +
> + return seq;
> +}
> +EXPORT_SYMBOL_GPL(selinux_status_get_seq);
> --
> 1.8.3.1
>
> --
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--
paul moore
security @ redhat

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