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-rw-r--r--net/netlabel/netlabel_mgmt.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/net/netlabel/netlabel_mgmt.c b/net/netlabel/netlabel_mgmt.c
index e00fc219c72..5315dacc522 100644
--- a/net/netlabel/netlabel_mgmt.c
+++ b/net/netlabel/netlabel_mgmt.c
@@ -42,6 +42,10 @@
#include "netlabel_user.h"
#include "netlabel_mgmt.h"
+/* NetLabel configured protocol count */
+static DEFINE_SPINLOCK(netlabel_mgmt_protocount_lock);
+static u32 netlabel_mgmt_protocount = 0;
+
/* Argument struct for netlbl_domhsh_walk() */
struct netlbl_domhsh_walk_arg {
struct netlink_callback *nl_cb;
@@ -67,6 +71,67 @@ static const struct nla_policy netlbl_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = {
};
/*
+ * NetLabel Misc Managment Functions
+ */
+
+/**
+ * netlbl_mgmt_protocount_inc - Increment the configured labeled protocol count
+ *
+ * Description:
+ * Increment the number of labeled protocol configurations in the current
+ * NetLabel configuration. Keep track of this for use in determining if
+ * NetLabel label enforcement should be active/enabled or not in the LSM.
+ *
+ */
+void netlbl_mgmt_protocount_inc(void)
+{
+ rcu_read_lock();
+ spin_lock(&netlabel_mgmt_protocount_lock);
+ netlabel_mgmt_protocount++;
+ spin_unlock(&netlabel_mgmt_protocount_lock);
+ rcu_read_unlock();
+}
+
+/**
+ * netlbl_mgmt_protocount_dec - Decrement the configured labeled protocol count
+ *
+ * Description:
+ * Decrement the number of labeled protocol configurations in the current
+ * NetLabel configuration. Keep track of this for use in determining if
+ * NetLabel label enforcement should be active/enabled or not in the LSM.
+ *
+ */
+void netlbl_mgmt_protocount_dec(void)
+{
+ rcu_read_lock();
+ spin_lock(&netlabel_mgmt_protocount_lock);
+ if (netlabel_mgmt_protocount > 0)
+ netlabel_mgmt_protocount--;
+ spin_unlock(&netlabel_mgmt_protocount_lock);
+ rcu_read_unlock();
+}
+
+/**
+ * netlbl_mgmt_protocount_value - Return the number of configured protocols
+ *
+ * Description:
+ * Return the number of labeled protocols in the current NetLabel
+ * configuration. This value is useful in determining if NetLabel label
+ * enforcement should be active/enabled or not in the LSM.
+ *
+ */
+u32 netlbl_mgmt_protocount_value(void)
+{
+ u32 val;
+
+ rcu_read_lock();
+ val = netlabel_mgmt_protocount;
+ rcu_read_unlock();
+
+ return val;
+}
+
+/*
* NetLabel Command Handlers
*/