From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Marcel Holtmann To: linux-bluetooth@vger.kernel.org Subject: [PATCH 1/2] Bluetooth: Add support for per socket msg_name callback Date: Sun, 13 Oct 2013 12:55:28 -0700 Message-Id: <1381694129-51112-1-git-send-email-marcel@holtmann.org> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: This allows to add a per socket msg_name callback that can be used for updating the msg_name information for recvmsg() system calls. This feature is used by another patch to support address information on L2CAP connectionless channels. Signed-off-by: Marcel Holtmann --- include/net/bluetooth/bluetooth.h | 1 + net/bluetooth/af_bluetooth.c | 15 +++++++++++---- 2 files changed, 12 insertions(+), 4 deletions(-) diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h index 1d6e484..896aad8 100644 --- a/include/net/bluetooth/bluetooth.h +++ b/include/net/bluetooth/bluetooth.h @@ -221,6 +221,7 @@ struct bt_sock { struct list_head accept_q; struct sock *parent; unsigned long flags; + void (*skb_msg_name)(struct sk_buff *, void *, int *); }; enum { diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c index 9c7e4ed..f0aadea 100644 --- a/net/bluetooth/af_bluetooth.c +++ b/net/bluetooth/af_bluetooth.c @@ -221,12 +221,12 @@ int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock, if (flags & (MSG_OOB)) return -EOPNOTSUPP; - msg->msg_namelen = 0; - skb = skb_recv_datagram(sk, flags, noblock, &err); if (!skb) { - if (sk->sk_shutdown & RCV_SHUTDOWN) + if (sk->sk_shutdown & RCV_SHUTDOWN) { + msg->msg_namelen = 0; return 0; + } return err; } @@ -238,9 +238,16 @@ int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock, skb_reset_transport_header(skb); err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); - if (err == 0) + if (err == 0) { sock_recv_ts_and_drops(msg, sk, skb); + if (bt_sk(sk)->skb_msg_name) + bt_sk(sk)->skb_msg_name(skb, msg->msg_name, + &msg->msg_namelen); + else + msg->msg_namelen = 0; + } + skb_free_datagram(sk, skb); return err ? : copied; -- 1.8.3.1