Bluetooth: Expose debug keys usage setting via debugfs

To allow easier debugging when debug keys are generated, provide debugfs
entry for checking the setting of debug keys usage.

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

diff --git a/net/bluetooth/hci_debugfs.c b/net/bluetooth/hci_debugfs.c
index 51a424c..2272384 100644 (file)
--- a/net/bluetooth/hci_debugfs.c
+++ b/net/bluetooth/hci_debugfs.c
@@ -212,6 +212,24 @@ static int conn_info_max_age_get(void *data, u64 *val)
 DEFINE_SIMPLE_ATTRIBUTE(conn_info_max_age_fops, conn_info_max_age_get,
                        conn_info_max_age_set, "%llu\n");
 
+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_USE_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 ssize_t sc_only_mode_read(struct file *file, char __user *user_buf,
                                 size_t count, loff_t *ppos)
 {
@@ -249,6 +267,10 @@ void hci_debugfs_create_common(struct hci_dev *hdev)
        debugfs_create_file("conn_info_max_age", 0644, hdev->debugfs, hdev,
                            &conn_info_max_age_fops);
 
+       if (lmp_ssp_capable(hdev) || lmp_le_capable(hdev))
+               debugfs_create_file("use_debug_keys", 0444, hdev->debugfs,
+                                   hdev, &use_debug_keys_fops);
+
        if (lmp_sc_capable(hdev) || lmp_le_capable(hdev))
                debugfs_create_file("sc_only_mode", 0444, hdev->debugfs,
                                    hdev, &sc_only_mode_fops);