linux-kernel - [PATCH v1] Bluetooth: Return whether a connection is outbound

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Message-Id: <20210323115459.v1.1.I3f19b22d6eaaa182123e373a9fa1fa85105aba07@changeid>
Date:   Tue, 23 Mar 2021 11:55:01 -0700
From:   Yu Liu <yudiliu@...gle.com>
To:     linux-bluetooth@...r.kernel.org, marcel@...tmann.org,
        chromeos-bluetooth-upstreaming@...omium.org
Cc:     Yu Liu <yudiliu@...gle.com>, Miao-chen Chou <mcchou@...omium.org>,
        Alain Michaud <alainm@...omium.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH v1] Bluetooth: Return whether a connection is outbound

When an MGMT_EV_DEVICE_CONNECTED event is reported back to the user
space we will set the flags to tell if the established connection is
outbound or not. This is useful for the user space to log better metrics
and error messages.

Reviewed-by: Miao-chen Chou <mcchou@...omium.org>
Reviewed-by: Alain Michaud <alainm@...omium.org>

Signed-off-by: Yu Liu <yudiliu@...gle.com>
---

Changes in v1:
- Initial change

 include/net/bluetooth/mgmt.h | 2 ++
 net/bluetooth/mgmt.c         | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index a7cffb069565..d66bc6938b58 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -885,6 +885,8 @@ struct mgmt_ev_new_long_term_key {
 	struct mgmt_ltk_info key;
 } __packed;
 
+#define MGMT_DEV_CONN_DIRECTION_OUT	0x01
+
 #define MGMT_EV_DEVICE_CONNECTED	0x000B
 struct mgmt_ev_device_connected {
 	struct mgmt_addr_info addr;
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 90334ac4a135..fc0ff6dc7ebf 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -8772,6 +8772,11 @@ void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
 	bacpy(&ev->addr.bdaddr, &conn->dst);
 	ev->addr.type = link_to_bdaddr(conn->type, conn->dst_type);
 
+	if (conn->out)
+		flags |= MGMT_DEV_CONN_DIRECTION_OUT;
+	else
+		flags &= ~MGMT_DEV_CONN_DIRECTION_OUT;
+
 	ev->flags = __cpu_to_le32(flags);
 
 	/* We must ensure that the EIR Data fields are ordered and
-- 
2.31.0.291.g576ba9dcdaf-goog