[PATCH v1 2/2] Bluetooth: sco: expose WBS packet length in socket option

[Joseph Hwang]

It is desirable to expose the wideband speech packet length via
a socket option to the user space so that the user space can set
the value correctly in configuring the sco connection.

Reviewed-by: Alain Michaud <ala...@chromium.org>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpan...@chromium.org>
Signed-off-by: Joseph Hwang <joseph...@chromium.org>
---

 include/net/bluetooth/bluetooth.h | 2 ++
 net/bluetooth/sco.c               | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/include/net/bluetooth/bluetooth.h 
b/include/net/bluetooth/bluetooth.h
index 9125effbf4483d..922cc03143def4 100644
--- a/include/net/bluetooth/bluetooth.h
+++ b/include/net/bluetooth/bluetooth.h
@@ -153,6 +153,8 @@ struct bt_voice {
 
 #define BT_SCM_PKT_STATUS      0x03
 
+#define BT_SCO_PKT_LEN         17
+
 __printf(1, 2)
 void bt_info(const char *fmt, ...);
 __printf(1, 2)
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index dcf7f96ff417e6..97e4e7c7b8cf62 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -67,6 +67,7 @@ struct sco_pinfo {
        __u32           flags;
        __u16           setting;
        __u8            cmsg_mask;
+       __u32           pkt_len;
        struct sco_conn *conn;
 };
 
@@ -267,6 +268,8 @@ static int sco_connect(struct sock *sk)
                sco_sock_set_timer(sk, sk->sk_sndtimeo);
        }
 
+       sco_pi(sk)->pkt_len = hdev->sco_pkt_len;
+
 done:
        hci_dev_unlock(hdev);
        hci_dev_put(hdev);
@@ -1001,6 +1004,11 @@ static int sco_sock_getsockopt(struct socket *sock, int 
level, int optname,
                        err = -EFAULT;
                break;
 
+       case BT_SCO_PKT_LEN:
+               if (put_user(sco_pi(sk)->pkt_len, (u32 __user *)optval))
+                       err = -EFAULT;
+               break;
+
        default:
                err = -ENOPROTOOPT;
                break;
-- 
2.28.0.236.gb10cc79966-goog