Bluetooth: Add support for setting SSP debug mode

Enabling and disabling SSP debug mode is useful for development. This
adds a debugfs entry that allows to configure the SSP debug mode.

On purpose this has been implemented as debugfs entry and not a public
API since it is really only useful during testing and development.

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

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 77a971a..ac9c4a7 100644 (file)
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1043,6 +1043,8 @@ struct hci_rp_write_remote_amp_assoc {
        __u8     phy_handle;
 } __packed;
 
+#define HCI_OP_WRITE_SSP_DEBUG_MODE    0x1804
+
 #define HCI_OP_LE_SET_EVENT_MASK       0x2001
 struct hci_cp_le_set_event_mask {
        __u8     mask[8];

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index c689bcf..d50cc7a 100644 (file)
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -169,6 +169,7 @@ struct hci_dev {
        __u8            page_scan_type;
        __u16           le_scan_interval;
        __u16           le_scan_window;
+       __u8            ssp_debug_mode;
 
        __u16           devid_source;
        __u16           devid_vendor;

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 384b9db..2a9e925 100644 (file)
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -303,6 +303,55 @@ static int auto_accept_delay_get(void *data, u64 *val)
 DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get,
                        auto_accept_delay_set, "%llu\n");
 
+static int ssp_debug_mode_set(void *data, u64 val)
+{
+       struct hci_dev *hdev = data;
+       struct sk_buff *skb;
+       __u8 mode;
+       int err;
+
+       if (val != 0 && val != 1)
+               return -EINVAL;
+
+       if (!test_bit(HCI_UP, &hdev->flags))
+               return -ENETDOWN;
+
+       hci_req_lock(hdev);
+       mode = val;
+       skb = __hci_cmd_sync(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE, sizeof(mode),
+                            &mode, HCI_CMD_TIMEOUT);
+       hci_req_unlock(hdev);
+
+       if (IS_ERR(skb))
+               return PTR_ERR(skb);
+
+       err = -bt_to_errno(skb->data[0]);
+       kfree_skb(skb);
+
+       if (err < 0)
+               return err;
+
+       hci_dev_lock(hdev);
+       hdev->ssp_debug_mode = val;
+       hci_dev_unlock(hdev);
+
+       return 0;
+}
+
+static int ssp_debug_mode_get(void *data, u64 *val)
+{
+       struct hci_dev *hdev = data;
+
+       hci_dev_lock(hdev);
+       *val = hdev->ssp_debug_mode;
+       hci_dev_unlock(hdev);
+
+       return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(ssp_debug_mode_fops, ssp_debug_mode_get,
+                       ssp_debug_mode_set, "%llu\n");
+
 static int idle_timeout_set(void *data, u64 val)
 {
        struct hci_dev *hdev = data;
@@ -1199,9 +1248,12 @@ static int __hci_init(struct hci_dev *hdev)
                                    hdev, &voice_setting_fops);
        }
 
-       if (lmp_ssp_capable(hdev))
+       if (lmp_ssp_capable(hdev)) {
                debugfs_create_file("auto_accept_delay", 0644, hdev->debugfs,
                                    hdev, &auto_accept_delay_fops);
+               debugfs_create_file("ssp_debug_mode", 0644, hdev->debugfs,
+                                   hdev, &ssp_debug_mode_fops);
+       }
 
        if (lmp_sniff_capable(hdev)) {
                debugfs_create_file("idle_timeout", 0644, hdev->debugfs,

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 1214d4b..5935f74 100644 (file)
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -198,6 +198,8 @@ static void hci_cc_reset(struct hci_dev *hdev, struct sk_buff *skb)
 
        memset(hdev->scan_rsp_data, 0, sizeof(hdev->scan_rsp_data));
        hdev->scan_rsp_data_len = 0;
+
+       hdev->ssp_debug_mode = 0;
 }
 
 static void hci_cc_write_local_name(struct hci_dev *hdev, struct sk_buff *skb)