plugins/admin: add admin_policy adapter driver

This adds code to register admin_policy driver to adapter when
admin plugin is enabled.

The following test steps were performed:
1. restart bluetoothd
2. check if "Admin Policy is enabled" in system log

Reviewed-by: Miao-chen Chou <mcchou@chromium.org>

1 files changed, 66 insertions, 1 deletions

diff --git a/plugins/admin.c b/plugins/admin.c
index 8c6a2be53..923e08cb8 100644
--- a/plugins/admin.c
+++ b/plugins/admin.c
@@ -12,19 +12,84 @@
 #include <config.h>
 #endif
 
+#include "lib/bluetooth.h"
+
+#include "src/adapter.h"
+#include "src/error.h"
 #include "src/log.h"
 #include "src/plugin.h"
 
+#include "src/shared/queue.h"
+
+/* |policy_data| has the same life cycle as btd_adapter */
+static struct btd_admin_policy {
+	struct btd_adapter *adapter;
+	uint16_t adapter_id;
+} *policy_data = NULL;
+
+static struct btd_admin_policy *admin_policy_new(struct btd_adapter *adapter)
+{
+	struct btd_admin_policy *admin_policy = NULL;
+
+	admin_policy = g_try_malloc(sizeof(*admin_policy));
+	if (!admin_policy) {
+		btd_error(btd_adapter_get_index(adapter),
+				"Failed to allocate memory for admin_policy");
+		return NULL;
+	}
+
+	admin_policy->adapter = adapter;
+	admin_policy->adapter_id = btd_adapter_get_index(adapter);
+
+	return admin_policy;
+}
+
+static void admin_policy_free(void *data)
+{
+	struct btd_admin_policy *admin_policy = data;
+
+	g_free(admin_policy);
+}
+
+static int admin_policy_adapter_probe(struct btd_adapter *adapter)
+{
+	if (policy_data) {
+		btd_warn(policy_data->adapter_id,
+						"Policy data already exists");
+		admin_policy_free(policy_data);
+		policy_data = NULL;
+	}
+
+	policy_data = admin_policy_new(adapter);
+	if (!policy_data)
+		return -ENOMEM;
+
+	btd_info(policy_data->adapter_id, "Admin Policy has been enabled");
+
+	return 0;
+}
+
+static struct btd_adapter_driver admin_policy_driver = {
+	.name	= "admin_policy",
+	.probe	= admin_policy_adapter_probe,
+	.resume = NULL,
+};
+
 static int admin_init(void)
 {
 	DBG("");
 
-	return 0;
+	return btd_register_adapter_driver(&admin_policy_driver);
 }
 
 static void admin_exit(void)
 {
 	DBG("");
+
+	btd_unregister_adapter_driver(&admin_policy_driver);
+
+	if (policy_data)
+		admin_policy_free(policy_data);
 }
 
 BLUETOOTH_PLUGIN_DEFINE(admin, VERSION,