[PATCH v4 5/7] Bluetooth: Notify adv monitor added event

[Miao-chen Chou <mcchou@chromium.org>]

This notifies management sockets on MGMT_EV_ADV_MONITOR_ADDED event.

The following test was performed.
- Start two btmgmt consoles, issue a btmgmt advmon-add command on one
console and observe a MGMT_EV_ADV_MONITOR_ADDED event on the other

Signed-off-by: Miao-chen Chou <mcchou@chromium.org>
---

Changes in v4: None
Changes in v3:
- Convert the endianness of the returned handle.

Changes in v2: None

 net/bluetooth/mgmt.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 887e193ce0038..0a1e89ce75eae 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -155,6 +155,7 @@ static const u16 mgmt_events[] = {
 	MGMT_EV_EXT_INFO_CHANGED,
 	MGMT_EV_PHY_CONFIGURATION_CHANGED,
 	MGMT_EV_EXP_FEATURE_CHANGED,
+	MGMT_EV_ADV_MONITOR_ADDED,
 };
 
 static const u16 mgmt_untrusted_commands[] = {
@@ -3853,6 +3854,16 @@ static int set_exp_feature(struct sock *sk, struct hci_dev *hdev,
 			       MGMT_STATUS_NOT_SUPPORTED);
 }
 
+static void mgmt_adv_monitor_added(struct sock *sk, struct hci_dev *hdev,
+				   u16 handle)
+{
+	struct mgmt_ev_adv_monitor_added ev;
+
+	ev.monitor_handle = cpu_to_le16(handle);
+
+	mgmt_event(MGMT_EV_ADV_MONITOR_ADDED, hdev, &ev, sizeof(ev), sk);
+}
+
 static int read_adv_monitor_features(struct sock *sk, struct hci_dev *hdev,
 				     void *data, u16 len)
 {
@@ -3905,8 +3916,8 @@ static int add_adv_patterns_monitor(struct sock *sk, struct hci_dev *hdev,
 	struct mgmt_rp_add_adv_patterns_monitor rp;
 	struct adv_monitor *m = NULL;
 	struct adv_pattern *p = NULL;
+	unsigned int mp_cnt = 0, prev_adv_monitors_cnt;
 	__u8 cp_ofst = 0, cp_len = 0;
-	unsigned int mp_cnt = 0;
 	int err, i;
 
 	BT_DBG("request for %s", hdev->name);
@@ -3970,6 +3981,8 @@ static int add_adv_patterns_monitor(struct sock *sk, struct hci_dev *hdev,
 
 	hci_dev_lock(hdev);
 
+	prev_adv_monitors_cnt = hdev->adv_monitors_cnt;
+
 	err = hci_add_adv_monitor(hdev, m);
 	if (err) {
 		if (err == -ENOSPC) {
@@ -3980,6 +3993,9 @@ static int add_adv_patterns_monitor(struct sock *sk, struct hci_dev *hdev,
 		goto unlock;
 	}
 
+	if (hdev->adv_monitors_cnt > prev_adv_monitors_cnt)
+		mgmt_adv_monitor_added(sk, hdev, m->handle);
+
 	hci_dev_unlock(hdev);
 
 	rp.monitor_handle = cpu_to_le16(m->handle);
-- 
2.26.2