Bluetooth: Implement debugfs support for listing UUIDs

This patch adds a debugfs entry to list the UUIDs that have been
registered through the management interface.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

1 files changed, 52 insertions, 0 deletions

diff --git a/net/bluetooth/hci_sysfs.c b/net/bluetooth/hci_sysfs.c
index 5fce3d6d07b4..23471dd9ee2f 100644
--- a/net/bluetooth/hci_sysfs.c
+++ b/net/bluetooth/hci_sysfs.c
@@ -461,6 +461,56 @@ static const struct file_operations blacklist_fops = {
         .llseek         = seq_lseek,
         .release        = single_release,
 };
+
+static void print_bt_uuid(struct seq_file *f, u8 *uuid)
+{
+        u32 data0, data4;
+        u16 data1, data2, data3, data5;
+
+        memcpy(&data0, &uuid[0], 4);
+        memcpy(&data1, &uuid[4], 2);
+        memcpy(&data2, &uuid[6], 2);
+        memcpy(&data3, &uuid[8], 2);
+        memcpy(&data4, &uuid[10], 4);
+        memcpy(&data5, &uuid[14], 2);
+
+        seq_printf(f, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x\n",
+                                ntohl(data0), ntohs(data1), ntohs(data2),
+                                ntohs(data3), ntohl(data4), ntohs(data5));
+}
+
+static int uuids_show(struct seq_file *f, void *p)
+{
+        struct hci_dev *hdev = f->private;
+        struct list_head *l;
+
+        hci_dev_lock_bh(hdev);
+
+        list_for_each(l, &hdev->uuids) {
+                struct bt_uuid *uuid;
+
+                uuid = list_entry(l, struct bt_uuid, list);
+
+                print_bt_uuid(f, uuid->uuid);
+        }
+
+        hci_dev_unlock_bh(hdev);
+
+        return 0;
+}
+
+static int uuids_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, uuids_show, inode->i_private);
+}
+
+static const struct file_operations uuids_fops = {
+        .open           = uuids_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
 int hci_register_sysfs(struct hci_dev *hdev)
 {
         struct device *dev = &hdev->dev;
@@ -493,6 +543,8 @@ int hci_register_sysfs(struct hci_dev *hdev)
         debugfs_create_file("blacklist", 0444, hdev->debugfs,
                                                 hdev, &blacklist_fops);
 
+        debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops);
+
         return 0;
 }