[SECMARK]: Add SELinux exports

Add and export new functions to the in-kernel SELinux API in support of the
new secmark-based packet controls.

Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 22 insertions, 0 deletions

diff --git a/security/selinux/exports.c b/security/selinux/exports.c
index ae4c73eb3085..9d7737db5e51 100644
--- a/security/selinux/exports.c
+++ b/security/selinux/exports.c
@@ -72,3 +72,25 @@ void selinux_get_task_sid(struct task_struct *tsk, u32 *sid)
         *sid = 0;
 }
 
+int selinux_string_to_sid(char *str, u32 *sid)
+{
+        if (selinux_enabled)
+                return security_context_to_sid(str, strlen(str), sid);
+        else {
+                *sid = 0;
+                return 0;
+        }
+}
+EXPORT_SYMBOL_GPL(selinux_string_to_sid);
+
+int selinux_relabel_packet_permission(u32 sid)
+{
+        if (selinux_enabled) {
+                struct task_security_struct *tsec = current->security;
+
+                return avc_has_perm(tsec->sid, sid, SECCLASS_PACKET,
+                                    PACKET__RELABELTO, NULL);
+        }
+        return 0;
+}
+EXPORT_SYMBOL_GPL(selinux_relabel_packet_permission);