[PATCH v2 7/8] Bluetooth: 6LoWPAN: Create a kernel module

[Jukka Rissanen <jukka.rissanen@xxxxxxxxxxxxxxx>]

Instead of adding the 6LoWPAN functionality to Bluetooth module,
we create a separate kernel module for it.

Usage:

In the client side do this:

# modprobe bluetooth_6lowpan
# echo 'psm 62' > /sys/kernel/debug/bluetooth/hci0/6lowpan
# hciconfig hci0 leadv


In the server side do this:

# modprobe bluetooth_6lowpan
# echo 'psm 62' > /sys/kernel/debug/bluetooth/hci0/6lowpan
# hcitool lecc E0:06:E6:B7:2A:73
# echo 'connect E0:06:E6:B7:2A:73 1' > \
                  /sys/kernel/debug/bluetooth/hci0/6lowpan

The 6LoWPAN functionality can be controlled by psm value. If it
is left to 0, then the module is disabled and all the 6LoWPAN
connections are dropped if there were any.

The 6lowpan controlling interface is a temporary solution
until the specifications are ready.

Signed-off-by: Jukka Rissanen <jukka.rissanen@xxxxxxxxxxxxxxx>
---
 net/bluetooth/6lowpan.c | 13 +++++++++++--
 net/bluetooth/Kconfig   |  6 +++---
 net/bluetooth/Makefile  |  4 +++-
 3 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c
index 46cc298..04e0501 100644
--- a/net/bluetooth/6lowpan.c
+++ b/net/bluetooth/6lowpan.c
@@ -14,6 +14,7 @@
 #include <linux/if_arp.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
+#include <linux/module.h>
 #include <linux/debugfs.h>
 
 #include <net/ipv6.h>
@@ -1223,14 +1224,14 @@ static struct hci_cb lowpan_cb = {
 	.connect_cfm	= lowpan_connect_hcon,
 };
 
-int bt_6lowpan_init(void)
+static int __init bt_6lowpan_init(void)
 {
 	hci_register_cb(&lowpan_cb);
 
 	return register_netdevice_notifier(&bt_6lowpan_dev_notifier);
 }
 
-void bt_6lowpan_cleanup(void)
+static void __exit bt_6lowpan_cleanup(void)
 {
 	debugfs_remove(lowpan_debugfs);
 
@@ -1238,3 +1239,11 @@ void bt_6lowpan_cleanup(void)
 
 	unregister_netdevice_notifier(&bt_6lowpan_dev_notifier);
 }
+
+module_init(bt_6lowpan_init);
+module_exit(bt_6lowpan_cleanup);
+
+MODULE_AUTHOR("Jukka Rissanen <jukka.rissanen@xxxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Bluetooth LE 6LoWPAN");
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
diff --git a/net/bluetooth/Kconfig b/net/bluetooth/Kconfig
index 06ec144..7ef1a5a 100644
--- a/net/bluetooth/Kconfig
+++ b/net/bluetooth/Kconfig
@@ -6,7 +6,6 @@ menuconfig BT
 	tristate "Bluetooth subsystem support"
 	depends on NET && !S390
 	depends on RFKILL || !RFKILL
-	select 6LOWPAN_IPHC if BT_6LOWPAN
 	select CRC16
 	select CRYPTO
 	select CRYPTO_BLKCIPHER
@@ -41,10 +40,11 @@ menuconfig BT
 	  more information, see <http://www.bluez.org/>.
 
 config BT_6LOWPAN
-	bool "Bluetooth 6LoWPAN support"
+	tristate "Bluetooth LE 6LoWPAN support"
 	depends on BT && IPV6
+	select 6LOWPAN_IPHC if BT_6LOWPAN
 	help
-	  IPv6 compression over Bluetooth.
+	  IPv6 compression over Bluetooth LE.
 
 source "net/bluetooth/rfcomm/Kconfig"
 
diff --git a/net/bluetooth/Makefile b/net/bluetooth/Makefile
index ca51246..886e9aa 100644
--- a/net/bluetooth/Makefile
+++ b/net/bluetooth/Makefile
@@ -7,10 +7,12 @@ obj-$(CONFIG_BT_RFCOMM)	+= rfcomm/
 obj-$(CONFIG_BT_BNEP)	+= bnep/
 obj-$(CONFIG_BT_CMTP)	+= cmtp/
 obj-$(CONFIG_BT_HIDP)	+= hidp/
+obj-$(CONFIG_BT_6LOWPAN) += bluetooth_6lowpan.o
+
+bluetooth_6lowpan-y := 6lowpan.o
 
 bluetooth-y := af_bluetooth.o hci_core.o hci_conn.o hci_event.o mgmt.o \
 	hci_sock.o hci_sysfs.o l2cap_core.o l2cap_sock.o smp.o sco.o lib.o \
 	a2mp.o amp.o
-bluetooth-$(CONFIG_BT_6LOWPAN) += 6lowpan.o
 
 subdir-ccflags-y += -D__CHECK_ENDIAN__
-- 
1.8.3.1

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