Bluetooth: Add debugfs support for showing the blacklist

This patch adds a debugfs blacklist entry for each HCI device which can
be used to list the current content of the blacklist.

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

1 files changed, 38 insertions, 0 deletions

diff --git a/net/bluetooth/hci_sysfs.c b/net/bluetooth/hci_sysfs.c
index 463ffa4fe042..ce44c47eeac1 100644
--- a/net/bluetooth/hci_sysfs.c
+++ b/net/bluetooth/hci_sysfs.c
@@ -436,6 +436,41 @@ static const struct file_operations inquiry_cache_fops = {
         .release        = single_release,
 };
 
+static int blacklist_show(struct seq_file *f, void *p)
+{
+        struct hci_dev *hdev = f->private;
+        struct bdaddr_list *blacklist = &hdev->blacklist;
+        struct list_head *l;
+
+        hci_dev_lock_bh(hdev);
+
+        list_for_each(l, &blacklist->list) {
+                struct bdaddr_list *b;
+                bdaddr_t bdaddr;
+
+                b = list_entry(l, struct bdaddr_list, list);
+
+                baswap(&bdaddr, &b->bdaddr);
+
+                seq_printf(f, "%s\n", batostr(&bdaddr));
+        }
+
+        hci_dev_unlock_bh(hdev);
+
+        return 0;
+}
+
+static int blacklist_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, blacklist_show, inode->i_private);
+}
+
+static const struct file_operations blacklist_fops = {
+        .open           = blacklist_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
 int hci_register_sysfs(struct hci_dev *hdev)
 {
         struct device *dev = &hdev->dev;
@@ -465,6 +500,9 @@ int hci_register_sysfs(struct hci_dev *hdev)
         debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
                                                 hdev, &inquiry_cache_fops);
 
+        debugfs_create_file("blacklist", 0444, hdev->debugfs,
+                                                hdev, &blacklist_fops);
+
         return 0;
 }