Bluetooth: Add debugfs entry for RPA regeneration timeout

This patch adds a rpa_timeout debugfs entry which can be used to set the
RPA regeneration timeout to something else than the default 15 minutes.

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

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 7bc67b4e47a7943ea161b022c3e209baf5e4c28d..629919be071c99171df89b0d0c79fb3e4f006a1b 100644 (file)
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -492,6 +492,37 @@ static int idle_timeout_get(void *data, u64 *val)
 DEFINE_SIMPLE_ATTRIBUTE(idle_timeout_fops, idle_timeout_get,
                        idle_timeout_set, "%llu\n");
 
+static int rpa_timeout_set(void *data, u64 val)
+{
+       struct hci_dev *hdev = data;
+
+       /* Require the RPA timeout to be at least 30 seconds and at most
+        * 24 hours.
+        */
+       if (val < 30 || val > (60 * 60 * 24))
+               return -EINVAL;
+
+       hci_dev_lock(hdev);
+       hdev->rpa_timeout = val;
+       hci_dev_unlock(hdev);
+
+       return 0;
+}
+
+static int rpa_timeout_get(void *data, u64 *val)
+{
+       struct hci_dev *hdev = data;
+
+       hci_dev_lock(hdev);
+       *val = hdev->rpa_timeout;
+       hci_dev_unlock(hdev);
+
+       return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(rpa_timeout_fops, rpa_timeout_get,
+                       rpa_timeout_set, "%llu\n");
+
 static int sniff_min_interval_set(void *data, u64 val)
 {
        struct hci_dev *hdev = data;
@@ -1612,6 +1643,8 @@ static int __hci_init(struct hci_dev *hdev)
                                    hdev, &random_address_fops);
                debugfs_create_file("static_address", 0444, hdev->debugfs,
                                    hdev, &static_address_fops);
+               debugfs_create_file("rpa_timeout", 0644, hdev->debugfs,
+                                   hdev, &rpa_timeout_fops);
 
                /* For controllers with a public address, provide a debug
                 * option to force the usage of the configured static