Bluetooth: Add discovering event to the Management interface

This patch adds a new event to the Management interface to track when
local adapters are discovering remote devices. For now this only tracks
BR/EDR discovery procedures.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

include/net/bluetooth/hci_core.h

@@ -790,6 +790,7 @@ int mgmt_read_local_oob_data_reply_complete(u16 index, u8 *hash, u8 *randomizer,
 int mgmt_device_found(u16 index, bdaddr_t *bdaddr, u8 *dev_class, s8 rssi,
 								u8 *eir);
 int mgmt_remote_name(u16 index, bdaddr_t *bdaddr, u8 *name);
+int mgmt_discovering(u16 index, u8 discovering);
 
 /* HCI info for socket */
 #define hci_pi(sk) ((struct hci_pinfo *) sk)

include/net/bluetooth/mgmt.h

@@ -285,3 +285,5 @@ struct mgmt_ev_remote_name {
 	bdaddr_t bdaddr;
 	__u8 name[MGMT_MAX_NAME_LENGTH];
 } __packed;
+
+#define MGMT_EV_DISCOVERING		0x0014

net/bluetooth/hci_event.c

@@ -56,7 +56,9 @@ static void hci_cc_inquiry_cancel(struct hci_dev *hdev, struct sk_buff *skb)
 	if (status)
 		return;
 
-	clear_bit(HCI_INQUIRY, &hdev->flags);
+	if (test_bit(HCI_MGMT, &hdev->flags) &&
+				test_and_clear_bit(HCI_INQUIRY, &hdev->flags))
+		mgmt_discovering(hdev->id, 0);
 
 	hci_req_complete(hdev, HCI_OP_INQUIRY_CANCEL, status);
 
@@ -72,7 +74,9 @@ static void hci_cc_exit_periodic_inq(struct hci_dev *hdev, struct sk_buff *skb)
 	if (status)
 		return;
 
-	clear_bit(HCI_INQUIRY, &hdev->flags);
+	if (test_bit(HCI_MGMT, &hdev->flags) &&
+				test_and_clear_bit(HCI_INQUIRY, &hdev->flags))
+		mgmt_discovering(hdev->id, 0);
 
 	hci_conn_check_pending(hdev);
 }
@@ -841,10 +845,14 @@ static inline void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
 
 	if (status) {
 		hci_req_complete(hdev, HCI_OP_INQUIRY, status);
-
 		hci_conn_check_pending(hdev);
-	} else
-		set_bit(HCI_INQUIRY, &hdev->flags);
+		return;
+	}
+
+	if (test_bit(HCI_MGMT, &hdev->flags) &&
+					!test_and_set_bit(HCI_INQUIRY,
+							&hdev->flags))
+		mgmt_discovering(hdev->id, 1);
 }
 
 static inline void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
@@ -1208,7 +1216,9 @@ static inline void hci_inquiry_complete_evt(struct hci_dev *hdev, struct sk_buff
 
 	BT_DBG("%s status %d", hdev->name, status);
 
-	clear_bit(HCI_INQUIRY, &hdev->flags);
+	if (test_bit(HCI_MGMT, &hdev->flags) &&
+				test_and_clear_bit(HCI_INQUIRY, &hdev->flags))
+		mgmt_discovering(hdev->id, 0);
 
 	hci_req_complete(hdev, HCI_OP_INQUIRY, status);
 
@@ -1228,6 +1238,12 @@ static inline void hci_inquiry_result_evt(struct hci_dev *hdev, struct sk_buff *
 
 	hci_dev_lock(hdev);
 
+	if (!test_and_set_bit(HCI_INQUIRY, &hdev->flags)) {
+
+		if (test_bit(HCI_MGMT, &hdev->flags))
+			mgmt_discovering(hdev->id, 1);
+	}
+
 	for (; num_rsp; num_rsp--, info++) {
 		bacpy(&data.bdaddr, &info->bdaddr);
 		data.pscan_rep_mode	= info->pscan_rep_mode;
@@ -2158,6 +2174,12 @@ static inline void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, struct
 
 	hci_dev_lock(hdev);
 
+	if (!test_and_set_bit(HCI_INQUIRY, &hdev->flags)) {
+
+		if (test_bit(HCI_MGMT, &hdev->flags))
+			mgmt_discovering(hdev->id, 1);
+	}
+
 	if ((skb->len - 1) / num_rsp != sizeof(struct inquiry_info_with_rssi)) {
 		struct inquiry_info_with_rssi_and_pscan_mode *info;
 		info = (void *) (skb->data + 1);
@@ -2320,6 +2342,12 @@ static inline void hci_extended_inquiry_result_evt(struct hci_dev *hdev, struct
 	if (!num_rsp)
 		return;
 
+	if (!test_and_set_bit(HCI_INQUIRY, &hdev->flags)) {
+
+		if (test_bit(HCI_MGMT, &hdev->flags))
+			mgmt_discovering(hdev->id, 1);
+	}
+
 	hci_dev_lock(hdev);
 
 	for (; num_rsp; num_rsp--, info++) {

net/bluetooth/mgmt.c

@@ -2149,3 +2149,9 @@ int mgmt_remote_name(u16 index, bdaddr_t *bdaddr, u8 *name)
 
 	return mgmt_event(MGMT_EV_REMOTE_NAME, index, &ev, sizeof(ev), NULL);
 }
+
+int mgmt_discovering(u16 index, u8 discovering)
+{
+	return mgmt_event(MGMT_EV_DISCOVERING, index, &discovering,
+						sizeof(discovering), NULL);
+}