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Subject[PATCH] selinux: add selinux_status_get_seq() function
Date
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(+)

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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