Bluetooth: Expose setting if debug keys are used or not

The system can be figured to accept and use debug keys. Expose this
value in debugfs for debugging purposes.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index d47c8ec90ca0..94d5342a4da6 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -215,6 +215,24 @@ static const struct file_operations link_keys_fops = {
         .release        = single_release,
 };
 
+static ssize_t use_debug_keys_read(struct file *file, char __user *user_buf,
+                                   size_t count, loff_t *ppos)
+{
+        struct hci_dev *hdev = file->private_data;
+        char buf[3];
+
+        buf[0] = test_bit(HCI_DEBUG_KEYS, &hdev->dev_flags) ? 'Y': 'N';
+        buf[1] = '\n';
+        buf[2] = '\0';
+        return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+}
+
+static const struct file_operations use_debug_keys_fops = {
+        .open           = simple_open,
+        .read           = use_debug_keys_read,
+        .llseek         = default_llseek,
+};
+
 static int dev_class_show(struct seq_file *f, void *ptr)
 {
         struct hci_dev *hdev = f->private;
@@ -1166,6 +1184,8 @@ static int __hci_init(struct hci_dev *hdev)
                                     hdev, &inquiry_cache_fops);
                 debugfs_create_file("link_keys", 0400, hdev->debugfs,
                                     hdev, &link_keys_fops);
+                debugfs_create_file("use_debug_keys", 0444, hdev->debugfs,
+                                    hdev, &use_debug_keys_fops);
                 debugfs_create_file("dev_class", 0444, hdev->debugfs,
                                     hdev, &dev_class_fops);
                 debugfs_create_file("voice_setting", 0444, hdev->debugfs,