Bluetooth: Add BT_PHY socket option

This adds BT_PHY socket option (read-only) which can be used to read
the PHYs in use by the underline connection.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h
index e42bb8e..1576353 100644 (file)
--- a/include/net/bluetooth/bluetooth.h
+++ b/include/net/bluetooth/bluetooth.h
@@ -121,6 +121,23 @@ struct bt_voice {
 
 #define BT_SNDMTU              12
 #define BT_RCVMTU              13
+#define BT_PHY                 14
+
+#define BT_PHY_BR_1M_1SLOT     0x00000001
+#define BT_PHY_BR_1M_3SLOT     0x00000002
+#define BT_PHY_BR_1M_5SLOT     0x00000004
+#define BT_PHY_EDR_2M_1SLOT    0x00000008
+#define BT_PHY_EDR_2M_3SLOT    0x00000010
+#define BT_PHY_EDR_2M_5SLOT    0x00000020
+#define BT_PHY_EDR_3M_1SLOT    0x00000040
+#define BT_PHY_EDR_3M_3SLOT    0x00000080
+#define BT_PHY_EDR_3M_5SLOT    0x00000100
+#define BT_PHY_LE_1M_TX                0x00000200
+#define BT_PHY_LE_1M_RX                0x00000400
+#define BT_PHY_LE_2M_TX                0x00000800
+#define BT_PHY_LE_2M_RX                0x00001000
+#define BT_PHY_LE_CODED_TX     0x00002000
+#define BT_PHY_LE_CODED_RX     0x00004000
 
 __printf(1, 2)
 void bt_info(const char *fmt, ...);

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 89ecf0a..dcc0dc6 100644 (file)
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1477,6 +1477,8 @@ void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
                             const void *param, u32 timeout);
 
+u32 hci_conn_get_phy(struct hci_conn *conn);
+
 /* ----- HCI Sockets ----- */
 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 8769140..65fa44c 100644 (file)
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -1725,3 +1725,110 @@ struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
 
        return hchan;
 }
+
+u32 hci_conn_get_phy(struct hci_conn *conn)
+{
+       u32 phys = 0;
+
+       hci_dev_lock(conn->hdev);
+
+       /* BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 2, Part B page 471:
+        * Table 6.2: Packets defined for synchronous, asynchronous, and
+        * CSB logical transport types.
+        */
+       switch (conn->type) {
+       case SCO_LINK:
+               /* SCO logical transport (1 Mb/s):
+                * HV1, HV2, HV3 and DV.
+                */
+               phys |= BT_PHY_BR_1M_1SLOT;
+
+               break;
+
+       case ACL_LINK:
+               /* ACL logical transport (1 Mb/s) ptt=0:
+                * DH1, DM3, DH3, DM5 and DH5.
+                */
+               phys |= BT_PHY_BR_1M_1SLOT;
+
+               if (conn->pkt_type & (HCI_DM3 | HCI_DH3))
+                       phys |= BT_PHY_BR_1M_3SLOT;
+
+               if (conn->pkt_type & (HCI_DM5 | HCI_DH5))
+                       phys |= BT_PHY_BR_1M_5SLOT;
+
+               /* ACL logical transport (2 Mb/s) ptt=1:
+                * 2-DH1, 2-DH3 and 2-DH5.
+                */
+               if (!(conn->pkt_type & HCI_2DH1))
+                       phys |= BT_PHY_EDR_2M_1SLOT;
+
+               if (!(conn->pkt_type & HCI_2DH3))
+                       phys |= BT_PHY_EDR_2M_3SLOT;
+
+               if (!(conn->pkt_type & HCI_2DH5))
+                       phys |= BT_PHY_EDR_2M_5SLOT;
+
+               /* ACL logical transport (3 Mb/s) ptt=1:
+                * 3-DH1, 3-DH3 and 3-DH5.
+                */
+               if (!(conn->pkt_type & HCI_3DH1))
+                       phys |= BT_PHY_EDR_3M_1SLOT;
+
+               if (!(conn->pkt_type & HCI_3DH3))
+                       phys |= BT_PHY_EDR_3M_3SLOT;
+
+               if (!(conn->pkt_type & HCI_3DH5))
+                       phys |= BT_PHY_EDR_3M_5SLOT;
+
+               break;
+
+       case ESCO_LINK:
+               /* eSCO logical transport (1 Mb/s): EV3, EV4 and EV5 */
+               phys |= BT_PHY_BR_1M_1SLOT;
+
+               if (!(conn->pkt_type & (ESCO_EV4 | ESCO_EV5)))
+                       phys |= BT_PHY_BR_1M_3SLOT;
+
+               /* eSCO logical transport (2 Mb/s): 2-EV3, 2-EV5 */
+               if (!(conn->pkt_type & ESCO_2EV3))
+                       phys |= BT_PHY_EDR_2M_1SLOT;
+
+               if (!(conn->pkt_type & ESCO_2EV5))
+                       phys |= BT_PHY_EDR_2M_3SLOT;
+
+               /* eSCO logical transport (3 Mb/s): 3-EV3, 3-EV5 */
+               if (!(conn->pkt_type & ESCO_3EV3))
+                       phys |= BT_PHY_EDR_3M_1SLOT;
+
+               if (!(conn->pkt_type & ESCO_3EV5))
+                       phys |= BT_PHY_EDR_3M_3SLOT;
+
+               break;
+
+       case LE_LINK:
+               if (conn->le_tx_phy & HCI_LE_SET_PHY_1M)
+                       phys |= BT_PHY_LE_1M_TX;
+
+               if (conn->le_rx_phy & HCI_LE_SET_PHY_1M)
+                       phys |= BT_PHY_LE_1M_RX;
+
+               if (conn->le_tx_phy & HCI_LE_SET_PHY_2M)
+                       phys |= BT_PHY_LE_2M_TX;
+
+               if (conn->le_rx_phy & HCI_LE_SET_PHY_2M)
+                       phys |= BT_PHY_LE_2M_RX;
+
+               if (conn->le_tx_phy & HCI_LE_SET_PHY_CODED)
+                       phys |= BT_PHY_LE_CODED_TX;
+
+               if (conn->le_rx_phy & HCI_LE_SET_PHY_CODED)
+                       phys |= BT_PHY_LE_CODED_RX;
+
+               break;
+       }
+
+       hci_dev_unlock(conn->hdev);
+
+       return phys;
+}

diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 390a9af..9fb47b2 100644 (file)
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -499,6 +499,7 @@ static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname,
        struct l2cap_chan *chan = l2cap_pi(sk)->chan;
        struct bt_security sec;
        struct bt_power pwr;
+       u32 phys;
        int len, err = 0;
 
        BT_DBG("sk %p", sk);
@@ -603,6 +604,18 @@ static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname,
                        err = -EFAULT;
                break;
 
+       case BT_PHY:
+               if (sk->sk_state == BT_CONNECTED) {
+                       err = -ENOTCONN;
+                       break;
+               }
+
+               phys = hci_conn_get_phy(chan->conn->hcon);
+
+               if (put_user(phys, (u32 __user *) optval))
+                       err = -EFAULT;
+               break;
+
        default:
                err = -ENOPROTOOPT;
                break;

diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index b91d6b4..29ab3e1 100644 (file)
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -922,6 +922,7 @@ static int sco_sock_getsockopt(struct socket *sock, int level, int optname,
        struct sock *sk = sock->sk;
        int len, err = 0;
        struct bt_voice voice;
+       u32 phys;
 
        BT_DBG("sk %p", sk);
 
@@ -956,6 +957,18 @@ static int sco_sock_getsockopt(struct socket *sock, int level, int optname,
 
                break;
 
+       case BT_PHY:
+               if (sk->sk_state == BT_CONNECTED) {
+                       err = -ENOTCONN;
+                       break;
+               }
+
+               phys = hci_conn_get_phy(sco_pi(sk)->conn->hcon);
+
+               if (put_user(phys, (u32 __user *) optval))
+                       err = -EFAULT;
+               break;
+
        default:
                err = -ENOPROTOOPT;
                break;