18  * using mmap interface on /selinux/status.
22  * The selinux_kernel_status structure on the head of status page is
24  * application should reference the status page according to the seqlock
27  * Typically, application checks status->sequence at the head of access
28  * control routine. If it is odd-number, kernel is updating the status,
32  * In most cases, application shall confirm the kernel status is not
39  * It returns a reference to selinux_status_page. If the status page is
44 	struct selinux_kernel_status   *status;  in selinux_kernel_status_page()  local
52 			status = page_address(selinux_state.status_page);  in selinux_kernel_status_page()
54 			status->version = SELINUX_KERNEL_STATUS_VERSION;  in selinux_kernel_status_page()
55 			status->sequence = 0;  in selinux_kernel_status_page()
56 			status->enforcing = enforcing_enabled();  in selinux_kernel_status_page()
59 			 * a positive value on the status->policyload,  in selinux_kernel_status_page()
63 			status->policyload = 0;  in selinux_kernel_status_page()
64 			status->deny_unknown =  in selinux_kernel_status_page()
77  * It updates status of the current enforcing/permissive mode.
81 	struct selinux_kernel_status   *status;  in selinux_status_update_setenforce()  local
85 		status = page_address(selinux_state.status_page);  in selinux_status_update_setenforce()
87 		status->sequence++;  in selinux_status_update_setenforce()
90 		status->enforcing = enforcing ? 1 : 0;  in selinux_status_update_setenforce()
93 		status->sequence++;  in selinux_status_update_setenforce()
101  * It updates status of the times of policy reloaded, and current
106 	struct selinux_kernel_status   *status;  in selinux_status_update_policyload()  local
110 		status = page_address(selinux_state.status_page);  in selinux_status_update_policyload()
112 		status->sequence++;  in selinux_status_update_policyload()
115 		status->policyload = seqno;  in selinux_status_update_policyload()
116 		status->deny_unknown = !security_get_allow_unknown();  in selinux_status_update_policyload()
119 		status->sequence++;  in selinux_status_update_policyload()