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Date:   Thu, 29 Jul 2021 16:56:43 +0800
In-Reply-To: <20210729085651.3600926-1-howardchung@google.com>
Message-Id: <20210729165211.Bluez.v5.5.Iee308dd18bfdfd3dae9e343e78b3942ee462314f@changeid>
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References: <20210729085651.3600926-1-howardchung@google.com>
Subject: [Bluez PATCH v5 05/13] core: add device_added and device_removed to
 adapter driver
From:   Howard Chung <howardchung@google.com>
To:     linux-bluetooth@vger.kernel.org, luiz.dentz@gmail.com
Cc:     Yun-Hao Chung <howardchung@chromium.org>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

From: Yun-Hao Chung <howardchung@chromium.org>

This adds device_added and device_removed to btd_adapter_driver so that
a driver can get notification when device is added or removed.
---

(no changes since v1)

 src/adapter.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++-----
 src/adapter.h |  4 ++++
 2 files changed, 58 insertions(+), 5 deletions(-)

diff --git a/src/adapter.c b/src/adapter.c
index 6c8096147bdd..5c556b569ca7 100644
--- a/src/adapter.c
+++ b/src/adapter.c
@@ -1218,6 +1218,9 @@ void adapter_service_remove(struct btd_adapter *adapter, uint32_t handle)
 	remove_record_from_server(rec->handle);
 }
 
+static void adapter_add_device(struct btd_adapter *adapter,
+						struct btd_device *device);
+
 static struct btd_device *adapter_create_device(struct btd_adapter *adapter,
 						const bdaddr_t *bdaddr,
 						uint8_t bdaddr_type)
@@ -1228,8 +1231,7 @@ static struct btd_device *adapter_create_device(struct btd_adapter *adapter,
 	if (!device)
 		return NULL;
 
-	adapter->devices = g_slist_append(adapter->devices, device);
-
+	adapter_add_device(adapter, device);
 	return device;
 }
 
@@ -1256,6 +1258,9 @@ static void service_auth_cancel(struct service_auth *auth)
 	g_free(auth);
 }
 
+static void adapter_remove_device(struct btd_adapter *adapter,
+						struct btd_device *device);
+
 void btd_adapter_remove_device(struct btd_adapter *adapter,
 				struct btd_device *dev)
 {
@@ -1263,7 +1268,7 @@ void btd_adapter_remove_device(struct btd_adapter *adapter,
 
 	adapter->connect_list = g_slist_remove(adapter->connect_list, dev);
 
-	adapter->devices = g_slist_remove(adapter->devices, dev);
+	adapter_remove_device(adapter, dev);
 	btd_adv_monitor_device_remove(adapter->adv_monitor_manager, dev);
 
 	adapter->discovery_found = g_slist_remove(adapter->discovery_found,
@@ -4665,7 +4670,7 @@ static void load_devices(struct btd_adapter *adapter)
 			goto free;
 
 		btd_device_set_temporary(device, false);
-		adapter->devices = g_slist_append(adapter->devices, device);
+		adapter_add_device(adapter, device);
 
 		/* TODO: register services from pre-loaded list of primaries */
 
@@ -4827,6 +4832,48 @@ void adapter_remove_profile(struct btd_adapter *adapter, gpointer p)
 		profile->adapter_remove(profile, adapter);
 }
 
+static void device_added_drivers(struct btd_adapter *adapter,
+						struct btd_device *device)
+{
+	struct btd_adapter_driver *driver;
+	GSList *l;
+
+	for (l = adapter_drivers; l; l = l->next) {
+		driver = l->data;
+
+		if (driver->device_added)
+			driver->device_added(adapter, device);
+	}
+}
+
+static void device_removed_drivers(struct btd_adapter *adapter,
+						struct btd_device *device)
+{
+	struct btd_adapter_driver *driver;
+	GSList *l;
+
+	for (l = adapter_drivers; l; l = l->next) {
+		driver = l->data;
+
+		if (driver->device_removed)
+			driver->device_removed(adapter, device);
+	}
+}
+
+static void adapter_add_device(struct btd_adapter *adapter,
+						struct btd_device *device)
+{
+	adapter->devices = g_slist_append(adapter->devices, device);
+	device_added_drivers(adapter, device);
+}
+
+static void adapter_remove_device(struct btd_adapter *adapter,
+						struct btd_device *device)
+{
+	adapter->devices = g_slist_remove(adapter->devices, device);
+	device_removed_drivers(adapter, device);
+}
+
 static void adapter_add_connection(struct btd_adapter *adapter,
 						struct btd_device *device,
 						uint8_t bdaddr_type)
@@ -6445,8 +6492,10 @@ static void adapter_remove(struct btd_adapter *adapter)
 	g_slist_free(adapter->connect_list);
 	adapter->connect_list = NULL;
 
-	for (l = adapter->devices; l; l = l->next)
+	for (l = adapter->devices; l; l = l->next) {
+		device_removed_drivers(adapter, l->data);
 		device_remove(l->data, FALSE);
+	}
 
 	g_slist_free(adapter->devices);
 	adapter->devices = NULL;
diff --git a/src/adapter.h b/src/adapter.h
index 7cac51451249..a2567330ddc9 100644
--- a/src/adapter.h
+++ b/src/adapter.h
@@ -111,6 +111,10 @@ struct btd_adapter_driver {
 	int (*probe) (struct btd_adapter *adapter);
 	void (*remove) (struct btd_adapter *adapter);
 	void (*resume) (struct btd_adapter *adapter);
+	void (*device_added) (struct btd_adapter *adapter,
+						struct btd_device *device);
+	void (*device_removed) (struct btd_adapter *adapter,
+						struct btd_device *device);
 };
 
 typedef void (*service_auth_cb) (DBusError *derr, void *user_data);
-- 
2.32.0.554.ge1b32706d8-goog