Bluetooth: Expose remote OOB information as debugfs entry

For debugging purposes it is good to know which OOB data is actually
currently loaded for each controller. So expose that list via debugfs.

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 5353f6ec8d68f822df08704992b61ecb92d06088..65261e5d4b84bbbdc1da1d11083b9f32b6233d7a 100644 (file)
--- a/net/bluetooth/hci_debugfs.c
+++ b/net/bluetooth/hci_debugfs.c
@@ -156,6 +156,35 @@ static const struct file_operations uuids_fops = {
        .release        = single_release,
 };
 
+static int remote_oob_show(struct seq_file *f, void *ptr)
+{
+       struct hci_dev *hdev = f->private;
+       struct oob_data *data;
+
+       hci_dev_lock(hdev);
+       list_for_each_entry(data, &hdev->remote_oob_data, list) {
+               seq_printf(f, "%pMR (type %u) %u %*phN %*phN %*phN %*phN\n",
+                          &data->bdaddr, data->bdaddr_type, data->present,
+                          16, data->hash192, 16, data->rand192,
+                          16, data->hash256, 19, data->rand256);
+       }
+       hci_dev_unlock(hdev);
+
+       return 0;
+}
+
+static int remote_oob_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, remote_oob_show, inode->i_private);
+}
+
+static const struct file_operations remote_oob_fops = {
+       .open           = remote_oob_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+};
+
 static int conn_info_min_age_set(void *data, u64 val)
 {
        struct hci_dev *hdev = data;
@@ -264,6 +293,8 @@ void hci_debugfs_create_common(struct hci_dev *hdev)
        debugfs_create_file("blacklist", 0444, hdev->debugfs, hdev,
                            &blacklist_fops);
        debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops);
+       debugfs_create_file("remote_oob", 0400, hdev->debugfs, hdev,
+                           &remote_oob_fops);
 
        debugfs_create_file("conn_info_min_age", 0644, hdev->debugfs, hdev,
                            &conn_info_min_age_fops);