[PATCH v3 2/2] Bluetooth: sco: new getsockopt options BT_SNDMTU/BT_RCVMTU

[Joseph Hwang]

This patch defines new getsockopt options BT_SNDMTU/BT_RCVMTU
for SCO socket to be compatible with other bluetooth sockets.
These new options return the same value as option SCO_OPTIONS
which is already present on existing kernels.

Reviewed-by: Alain Michaud <alainm@xxxxxxxxxxxx>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@xxxxxxxxxxxx>
Signed-off-by: Joseph Hwang <josephsih@xxxxxxxxxxxx>
---

Changes in v3:
- Fixed the commit message.

Changes in v2:
- Used BT_SNDMTU/BT_RCVMTU instead of creating a new opt name.
- Used the existing conn->mtu instead of creating a new member
  in struct sco_pinfo.
- Noted that the old SCO_OPTIONS in sco_sock_getsockopt_old()
  would just work as it uses sco_pi(sk)->conn->mtu.

 net/bluetooth/sco.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index dcf7f96ff417e6..79ffcdef0b7ad5 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -1001,6 +1001,12 @@ static int sco_sock_getsockopt(struct socket *sock, int level, int optname,
 			err = -EFAULT;
 		break;
 
+	case BT_SNDMTU:
+	case BT_RCVMTU:
+		if (put_user(sco_pi(sk)->conn->mtu, (u32 __user *)optval))
+			err = -EFAULT;
+		break;
+
 	default:
 		err = -ENOPROTOOPT;
 		break;
-- 
2.28.0.618.gf4bc123cb7-goog