Hi Joseph,
On Thu, Aug 13, 2020 at 1:42 AM Joseph Hwang <josephsih@xxxxxxxxxxxx> wrote:
>
> 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 <alainm@xxxxxxxxxxxx>
> Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@xxxxxxxxxxxx>
> Signed-off-by: Joseph Hwang <josephsih@xxxxxxxxxxxx>
> ---
>
> 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;
Couldn't we expose this via BT_SNDMTU/BT_RCVMTU?
> default:
> err = -ENOPROTOOPT;
> break;
> --
> 2.28.0.236.gb10cc79966-goog
>
--
Luiz Augusto von Dentz
