Bluetooth: Pass desired connection role to hci_connect_le()

If we have both LE scanning and advertising simultaneously enabled we
need a way to tell hci_connect_le() in which role to initiate a
connection. This patch adds a new parameter to the function to give it
the necessary information. For auto-connect and mgmt_pair_device we
always use master role, whereas for L2CAP users (in practice sockets) we
use slave role whenever HCI_ADVERTISING is set and master role
otherwise.

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

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 8752ac6..5701d15 100644 (file)
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -704,7 +704,8 @@ void hci_chan_list_flush(struct hci_conn *conn);
 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
 
 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
-                               u8 dst_type, u8 sec_level, u16 conn_timeout);
+                               u8 dst_type, u8 sec_level, u16 conn_timeout,
+                               bool master);
 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
                                 u8 sec_level, u8 auth_type);
 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 9323044..16fd55d 100644 (file)
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -700,7 +700,8 @@ static void hci_req_directed_advertising(struct hci_request *req,
 }
 
 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
-                               u8 dst_type, u8 sec_level, u16 conn_timeout)
+                               u8 dst_type, u8 sec_level, u16 conn_timeout,
+                               bool master)
 {
        struct hci_conn_params *params;
        struct hci_conn *conn;
@@ -760,7 +761,8 @@ struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 
        hci_req_init(&req, hdev);
 
-       if (test_bit(HCI_ADVERTISING, &hdev->dev_flags)) {
+       /* If requested to connect as slave use directed advertising */
+       if (!master) {
                hci_req_directed_advertising(&req, conn);
                goto create_conn;
        }

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index ad39d9a..a681649 100644 (file)
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -4253,8 +4253,9 @@ static void check_pending_le_conn(struct hci_dev *hdev, bdaddr_t *addr,
                return;
 
 connect:
+       /* Request connection in master = true role */
        conn = hci_connect_le(hdev, addr, addr_type, BT_SECURITY_LOW,
-                             HCI_LE_AUTOCONN_TIMEOUT);
+                             HCI_LE_AUTOCONN_TIMEOUT, true);
        if (!IS_ERR(conn))
                return;
 

diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 3daab45..bf379a3 100644 (file)
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -7124,6 +7124,8 @@ int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
        chan->dcid = cid;
 
        if (bdaddr_type_is_le(dst_type)) {
+               bool master;
+
                /* Convert from L2CAP channel address type to HCI address type
                 */
                if (dst_type == BDADDR_LE_PUBLIC)
@@ -7131,8 +7133,10 @@ int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
                else
                        dst_type = ADDR_LE_DEV_RANDOM;
 
+               master = !test_bit(HCI_ADVERTISING, &hdev->dev_flags);
+
                hcon = hci_connect_le(hdev, dst, dst_type, chan->sec_level,
-                                     HCI_LE_CONN_TIMEOUT);
+                                     HCI_LE_CONN_TIMEOUT, master);
        } else {
                u8 auth_type = l2cap_get_auth_type(chan);
                hcon = hci_connect_acl(hdev, dst, chan->sec_level, auth_type);

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index e7047de..b391e2f 100644 (file)
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -3117,8 +3117,9 @@ static int pair_device(struct sock *sk, struct hci_dev *hdev, void *data,
                 */
                hci_conn_params_add(hdev, &cp->addr.bdaddr, addr_type);
 
+               /* Request a connection with master = true role */
                conn = hci_connect_le(hdev, &cp->addr.bdaddr, addr_type,
-                                     sec_level, HCI_LE_CONN_TIMEOUT);
+                                     sec_level, HCI_LE_CONN_TIMEOUT, true);
        }
 
        if (IS_ERR(conn)) {