Bluetooth: Consolidate code around sk_alloc into a helper function

This consolidates code around sk_alloc into bt_sock_alloc which does
take care of common initialization.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

include/net/bluetooth/bluetooth.h

@@ -400,6 +400,8 @@ int  bt_sock_register(int proto, const struct net_proto_family *ops);
 void bt_sock_unregister(int proto);
 void bt_sock_link(struct bt_sock_list *l, struct sock *s);
 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
+struct sock *bt_sock_alloc(struct net *net, struct socket *sock,
+			   struct proto *prot, int proto, gfp_t prio, int kern);
 int  bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
 		     int flags);
 int  bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,

net/bluetooth/af_bluetooth.c

@@ -140,6 +140,27 @@ static int bt_sock_create(struct net *net, struct socket *sock, int proto,
 	return err;
 }
 
+struct sock *bt_sock_alloc(struct net *net, struct socket *sock,
+			   struct proto *prot, int proto, gfp_t prio, int kern)
+{
+	struct sock *sk;
+
+	sk = sk_alloc(net, PF_BLUETOOTH, prio, prot, kern);
+	if (!sk)
+		return NULL;
+
+	sock_init_data(sock, sk);
+	INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
+
+	sock_reset_flag(sk, SOCK_ZAPPED);
+
+	sk->sk_protocol = proto;
+	sk->sk_state    = BT_OPEN;
+
+	return sk;
+}
+EXPORT_SYMBOL(bt_sock_alloc);
+
 void bt_sock_link(struct bt_sock_list *l, struct sock *sk)
 {
 	write_lock(&l->lock);

net/bluetooth/bnep/sock.c

@@ -205,21 +205,13 @@ static int bnep_sock_create(struct net *net, struct socket *sock, int protocol,
 	if (sock->type != SOCK_RAW)
 		return -ESOCKTNOSUPPORT;
 
-	sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto, kern);
+	sk = bt_sock_alloc(net, sock, &bnep_proto, protocol, GFP_ATOMIC, kern);
 	if (!sk)
 		return -ENOMEM;
 
-	sock_init_data(sock, sk);
-
 	sock->ops = &bnep_sock_ops;
-
 	sock->state = SS_UNCONNECTED;
 
-	sock_reset_flag(sk, SOCK_ZAPPED);
-
-	sk->sk_protocol = protocol;
-	sk->sk_state	= BT_OPEN;
-
 	bt_sock_link(&bnep_sk_list, sk);
 	return 0;
 }

net/bluetooth/hci_sock.c

@@ -2143,18 +2143,12 @@ static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
 
 	sock->ops = &hci_sock_ops;
 
-	sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto, kern);
+	sk = bt_sock_alloc(net, sock, &hci_sk_proto, protocol, GFP_ATOMIC,
+			   kern);
 	if (!sk)
 		return -ENOMEM;
 
-	sock_init_data(sock, sk);
-
-	sock_reset_flag(sk, SOCK_ZAPPED);
-
-	sk->sk_protocol = protocol;
-
 	sock->state = SS_UNCONNECTED;
-	sk->sk_state = BT_OPEN;
 	sk->sk_destruct = hci_sock_destruct;
 
 	bt_sock_link(&hci_sk_list, sk);

net/bluetooth/iso.c

@@ -738,21 +738,13 @@ static struct sock *iso_sock_alloc(struct net *net, struct socket *sock,
 {
 	struct sock *sk;
 
-	sk = sk_alloc(net, PF_BLUETOOTH, prio, &iso_proto, kern);
+	sk = bt_sock_alloc(net, sock, &iso_proto, proto, prio, kern);
 	if (!sk)
 		return NULL;
 
-	sock_init_data(sock, sk);
-	INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
-
 	sk->sk_destruct = iso_sock_destruct;
 	sk->sk_sndtimeo = ISO_CONN_TIMEOUT;
 
-	sock_reset_flag(sk, SOCK_ZAPPED);
-
-	sk->sk_protocol = proto;
-	sk->sk_state    = BT_OPEN;
-
 	/* Set address type as public as default src address is BDADDR_ANY */
 	iso_pi(sk)->src_type = BDADDR_LE_PUBLIC;
 

net/bluetooth/l2cap_sock.c

@@ -1858,21 +1858,13 @@ static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock,
 	struct sock *sk;
 	struct l2cap_chan *chan;
 
-	sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto, kern);
+	sk = bt_sock_alloc(net, sock, &l2cap_proto, proto, prio, kern);
 	if (!sk)
 		return NULL;
 
-	sock_init_data(sock, sk);
-	INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
-
 	sk->sk_destruct = l2cap_sock_destruct;
 	sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT;
 
-	sock_reset_flag(sk, SOCK_ZAPPED);
-
-	sk->sk_protocol = proto;
-	sk->sk_state = BT_OPEN;
-
 	chan = l2cap_chan_create();
 	if (!chan) {
 		sk_free(sk);

net/bluetooth/rfcomm/sock.c

@@ -268,18 +268,16 @@ static struct proto rfcomm_proto = {
 	.obj_size	= sizeof(struct rfcomm_pinfo)
 };
 
-static struct sock *rfcomm_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio, int kern)
+static struct sock *rfcomm_sock_alloc(struct net *net, struct socket *sock,
+				      int proto, gfp_t prio, int kern)
 {
 	struct rfcomm_dlc *d;
 	struct sock *sk;
 
-	sk = sk_alloc(net, PF_BLUETOOTH, prio, &rfcomm_proto, kern);
+	sk = bt_sock_alloc(net, sock, &rfcomm_proto, proto, prio, kern);
 	if (!sk)
 		return NULL;
 
-	sock_init_data(sock, sk);
-	INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
-
 	d = rfcomm_dlc_alloc(prio);
 	if (!d) {
 		sk_free(sk);
@@ -298,11 +296,6 @@ static struct sock *rfcomm_sock_alloc(struct net *net, struct socket *sock, int
 	sk->sk_sndbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10;
 	sk->sk_rcvbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10;
 
-	sock_reset_flag(sk, SOCK_ZAPPED);
-
-	sk->sk_protocol = proto;
-	sk->sk_state    = BT_OPEN;
-
 	bt_sock_link(&rfcomm_sk_list, sk);
 
 	BT_DBG("sk %p", sk);

net/bluetooth/sco.c

@@ -504,21 +504,13 @@ static struct sock *sco_sock_alloc(struct net *net, struct socket *sock,
 {
 	struct sock *sk;
 
-	sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto, kern);
+	sk = bt_sock_alloc(net, sock, &sco_proto, proto, prio, kern);
 	if (!sk)
 		return NULL;
 
-	sock_init_data(sock, sk);
-	INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
-
 	sk->sk_destruct = sco_sock_destruct;
 	sk->sk_sndtimeo = SCO_CONN_TIMEOUT;
 
-	sock_reset_flag(sk, SOCK_ZAPPED);
-
-	sk->sk_protocol = proto;
-	sk->sk_state    = BT_OPEN;
-
 	sco_pi(sk)->setting = BT_VOICE_CVSD_16BIT;
 	sco_pi(sk)->codec.id = BT_CODEC_CVSD;
 	sco_pi(sk)->codec.cid = 0xffff;