Bluetooth: Add native RFKILL soft-switch support for all devices

With the re-write of the RFKILL subsystem it is now possible to easily
integrate RFKILL soft-switch support into the Bluetooth subsystem. All
Bluetooth devices will now get automatically RFKILL support.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

2 files changed, 42 insertions, 1 deletions

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 73aead222b32..c4ca4228b083 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -137,6 +137,8 @@ struct hci_dev {
         struct device           *parent;
         struct device           dev;
 
+        struct rfkill           *rfkill;
+
         struct module           *owner;
 
         int (*open)(struct hci_dev *hdev);
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index cd061510b6bd..406ad07cdea1 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -39,6 +39,7 @@
 #include <linux/skbuff.h>
 #include <linux/interrupt.h>
 #include <linux/notifier.h>
+#include <linux/rfkill.h>
 #include <net/sock.h>
 
 #include <asm/system.h>
@@ -476,6 +477,11 @@ int hci_dev_open(__u16 dev)
 
         hci_req_lock(hdev);
 
+        if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
+                ret = -ERFKILL;
+                goto done;
+        }
+
         if (test_bit(HCI_UP, &hdev->flags)) {
                 ret = -EALREADY;
                 goto done;
@@ -813,6 +819,24 @@ int hci_get_dev_info(void __user *arg)
 
 /* ---- Interface to HCI drivers ---- */
 
+static int hci_rfkill_set_block(void *data, bool blocked)
+{
+        struct hci_dev *hdev = data;
+
+        BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
+
+        if (!blocked)
+                return 0;
+
+        hci_dev_do_close(hdev);
+
+        return 0;
+}
+
+static const struct rfkill_ops hci_rfkill_ops = {
+        .set_block = hci_rfkill_set_block,
+};
+
 /* Alloc HCI device */
 struct hci_dev *hci_alloc_dev(void)
 {
@@ -844,7 +868,8 @@ int hci_register_dev(struct hci_dev *hdev)
         struct list_head *head = &hci_dev_list, *p;
         int i, id = 0;
 
-        BT_DBG("%p name %s type %d owner %p", hdev, hdev->name, hdev->type, hdev->owner);
+        BT_DBG("%p name %s type %d owner %p", hdev, hdev->name,
+                                                hdev->type, hdev->owner);
 
         if (!hdev->open || !hdev->close || !hdev->destruct)
                 return -EINVAL;
@@ -900,6 +925,15 @@ int hci_register_dev(struct hci_dev *hdev)
 
         hci_register_sysfs(hdev);
 
+        hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
+                                RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
+        if (hdev->rfkill) {
+                if (rfkill_register(hdev->rfkill) < 0) {
+                        rfkill_destroy(hdev->rfkill);
+                        hdev->rfkill = NULL;
+                }
+        }
+
         hci_notify(hdev, HCI_DEV_REG);
 
         return id;
@@ -924,6 +958,11 @@ int hci_unregister_dev(struct hci_dev *hdev)
 
         hci_notify(hdev, HCI_DEV_UNREG);
 
+        if (hdev->rfkill) {
+                rfkill_unregister(hdev->rfkill);
+                rfkill_destroy(hdev->rfkill);
+        }
+
         hci_unregister_sysfs(hdev);
 
         __hci_dev_put(hdev);