[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bluetooth / af_bluetooth.c

/*
   BlueZ - Bluetooth protocol stack for Linux
   Copyright (C) 2000-2001 Qualcomm Incorporated

   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License version 2 as
   published by the Free Software Foundation;

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
   SOFTWARE IS DISCLAIMED.
*/

/* Bluetooth address family and sockets. */

#include <linux/module.h>

#include <linux/types.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/skbuff.h>
#include <linux/init.h>
#include <linux/poll.h>
#include <net/sock.h>
#include <asm/ioctls.h>
#include <linux/kmod.h>

#include <net/bluetooth/bluetooth.h>

#define VERSION "2.15"

/* Bluetooth sockets */
#define BT_MAX_PROTO	8
static const struct net_proto_family *bt_proto[BT_MAX_PROTO];
static DEFINE_RWLOCK(bt_proto_lock);

static struct lock_class_key bt_lock_key[BT_MAX_PROTO];
static const char *const bt_key_strings[BT_MAX_PROTO] = {
	"sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP",
	"sk_lock-AF_BLUETOOTH-BTPROTO_HCI",
	"sk_lock-AF_BLUETOOTH-BTPROTO_SCO",
	"sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM",
	"sk_lock-AF_BLUETOOTH-BTPROTO_BNEP",
	"sk_lock-AF_BLUETOOTH-BTPROTO_CMTP",
	"sk_lock-AF_BLUETOOTH-BTPROTO_HIDP",
	"sk_lock-AF_BLUETOOTH-BTPROTO_AVDTP",
};

static struct lock_class_key bt_slock_key[BT_MAX_PROTO];
static const char *const bt_slock_key_strings[BT_MAX_PROTO] = {
	"slock-AF_BLUETOOTH-BTPROTO_L2CAP",
	"slock-AF_BLUETOOTH-BTPROTO_HCI",
	"slock-AF_BLUETOOTH-BTPROTO_SCO",
	"slock-AF_BLUETOOTH-BTPROTO_RFCOMM",
	"slock-AF_BLUETOOTH-BTPROTO_BNEP",
	"slock-AF_BLUETOOTH-BTPROTO_CMTP",
	"slock-AF_BLUETOOTH-BTPROTO_HIDP",
	"slock-AF_BLUETOOTH-BTPROTO_AVDTP",
};

static inline void bt_sock_reclassify_lock(struct socket *sock, int proto)
{
	struct sock *sk = sock->sk;

	if (!sk)
		return;

	BUG_ON(sock_owned_by_user(sk));

	sock_lock_init_class_and_name(sk,
			bt_slock_key_strings[proto], &bt_slock_key[proto],
				bt_key_strings[proto], &bt_lock_key[proto]);
}

int bt_sock_register(int proto, const struct net_proto_family *ops)
{
	int err = 0;

	if (proto < 0 || proto >= BT_MAX_PROTO)
		return -EINVAL;

	write_lock(&bt_proto_lock);

	if (bt_proto[proto])
		err = -EEXIST;
	else
		bt_proto[proto] = ops;

	write_unlock(&bt_proto_lock);

	return err;
}
EXPORT_SYMBOL(bt_sock_register);

int bt_sock_unregister(int proto)
{
	int err = 0;

	if (proto < 0 || proto >= BT_MAX_PROTO)
		return -EINVAL;

	write_lock(&bt_proto_lock);

	if (!bt_proto[proto])
		err = -ENOENT;
	else
		bt_proto[proto] = NULL;

	write_unlock(&bt_proto_lock);

	return err;
}
EXPORT_SYMBOL(bt_sock_unregister);

static int bt_sock_create(struct net *net, struct socket *sock, int proto,
			  int kern)
{
	int err;

	if (net != &init_net)
		return -EAFNOSUPPORT;

	if (proto < 0 || proto >= BT_MAX_PROTO)
		return -EINVAL;

	if (!bt_proto[proto])
		request_module("bt-proto-%d", proto);

	err = -EPROTONOSUPPORT;

	read_lock(&bt_proto_lock);

	if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) {
		err = bt_proto[proto]->create(net, sock, proto, kern);
		bt_sock_reclassify_lock(sock, proto);
		module_put(bt_proto[proto]->owner);
	}

	read_unlock(&bt_proto_lock);

	return err;
}

void bt_sock_link(struct bt_sock_list *l, struct sock *sk)
{
	write_lock_bh(&l->lock);
	sk_add_node(sk, &l->head);
	write_unlock_bh(&l->lock);
}
EXPORT_SYMBOL(bt_sock_link);

void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk)
{
	write_lock_bh(&l->lock);
	sk_del_node_init(sk);
	write_unlock_bh(&l->lock);
}
EXPORT_SYMBOL(bt_sock_unlink);

void bt_accept_enqueue(struct sock *parent, struct sock *sk)
{
	BT_DBG("parent %p, sk %p", parent, sk);

	sock_hold(sk);
	list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q);
	bt_sk(sk)->parent = parent;
	parent->sk_ack_backlog++;
}
EXPORT_SYMBOL(bt_accept_enqueue);

void bt_accept_unlink(struct sock *sk)
{
	BT_DBG("sk %p state %d", sk, sk->sk_state);

	list_del_init(&bt_sk(sk)->accept_q);
	bt_sk(sk)->parent->sk_ack_backlog--;
	bt_sk(sk)->parent = NULL;
	sock_put(sk);
}
EXPORT_SYMBOL(bt_accept_unlink);

struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock)
{
	struct list_head *p, *n;
	struct sock *sk;

	BT_DBG("parent %p", parent);

	list_for_each_safe(p, n, &bt_sk(parent)->accept_q) {
		sk = (struct sock *) list_entry(p, struct bt_sock, accept_q);

		lock_sock(sk);

		/* FIXME: Is this check still needed */
		if (sk->sk_state == BT_CLOSED) {
			release_sock(sk);
			bt_accept_unlink(sk);
			continue;
		}

		if (sk->sk_state == BT_CONNECTED || !newsock ||
						bt_sk(parent)->defer_setup) {
			bt_accept_unlink(sk);
			if (newsock)
				sock_graft(sk, newsock);
			release_sock(sk);
			return sk;
		}

		release_sock(sk);
	}
	return NULL;
}
EXPORT_SYMBOL(bt_accept_dequeue);

int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
				struct msghdr *msg, size_t len, int flags)
{
	int noblock = flags & MSG_DONTWAIT;
	struct sock *sk = sock->sk;
	struct sk_buff *skb;
	size_t copied;
	int err;

	BT_DBG("sock %p sk %p len %zu", sock, sk, len);

	if (flags & (MSG_OOB))
		return -EOPNOTSUPP;

	if (!(skb = skb_recv_datagram(sk, flags, noblock, &err))) {
		if (sk->sk_shutdown & RCV_SHUTDOWN)
			return 0;
		return err;
	}

	msg->msg_namelen = 0;

	copied = skb->len;
	if (len < copied) {
		msg->msg_flags |= MSG_TRUNC;
		copied = len;
	}

	skb_reset_transport_header(skb);
	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
	if (err == 0)
		sock_recv_ts_and_drops(msg, sk, skb);

	skb_free_datagram(sk, skb);

	return err ? : copied;
}
EXPORT_SYMBOL(bt_sock_recvmsg);

static inline unsigned int bt_accept_poll(struct sock *parent)
{
	struct list_head *p, *n;
	struct sock *sk;

	list_for_each_safe(p, n, &bt_sk(parent)->accept_q) {
		sk = (struct sock *) list_entry(p, struct bt_sock, accept_q);
		if (sk->sk_state == BT_CONNECTED ||
					(bt_sk(parent)->defer_setup &&
						sk->sk_state == BT_CONNECT2))
			return POLLIN | POLLRDNORM;
	}

	return 0;
}

unsigned int bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait)
{
	struct sock *sk = sock->sk;
	unsigned int mask = 0;

	BT_DBG("sock %p, sk %p", sock, sk);

	poll_wait(file, sk_sleep(sk), wait);

	if (sk->sk_state == BT_LISTEN)
		return bt_accept_poll(sk);

	if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
		mask |= POLLERR;

	if (sk->sk_shutdown & RCV_SHUTDOWN)
		mask |= POLLRDHUP | POLLIN | POLLRDNORM;

	if (sk->sk_shutdown == SHUTDOWN_MASK)
		mask |= POLLHUP;

	if (!skb_queue_empty(&sk->sk_receive_queue))
		mask |= POLLIN | POLLRDNORM;

	if (sk->sk_state == BT_CLOSED)
		mask |= POLLHUP;

	if (sk->sk_state == BT_CONNECT ||
			sk->sk_state == BT_CONNECT2 ||
			sk->sk_state == BT_CONFIG)
		return mask;

	if (sock_writeable(sk))
		mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
	else
		set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);

	return mask;
}
EXPORT_SYMBOL(bt_sock_poll);

int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
	struct sock *sk = sock->sk;
	struct sk_buff *skb;
	long amount;
	int err;

	BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);

	switch (cmd) {
	case TIOCOUTQ:
		if (sk->sk_state == BT_LISTEN)
			return -EINVAL;

		amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
		if (amount < 0)
			amount = 0;
		err = put_user(amount, (int __user *) arg);
		break;

	case TIOCINQ:
		if (sk->sk_state == BT_LISTEN)
			return -EINVAL;

		lock_sock(sk);
		skb = skb_peek(&sk->sk_receive_queue);
		amount = skb ? skb->len : 0;
		release_sock(sk);
		err = put_user(amount, (int __user *) arg);
		break;

	case SIOCGSTAMP:
		err = sock_get_timestamp(sk, (struct timeval __user *) arg);
		break;

	case SIOCGSTAMPNS:
		err = sock_get_timestampns(sk, (struct timespec __user *) arg);
		break;

	default:
		err = -ENOIOCTLCMD;
		break;
	}

	return err;
}
EXPORT_SYMBOL(bt_sock_ioctl);

int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
{
	DECLARE_WAITQUEUE(wait, current);
	int err = 0;

	BT_DBG("sk %p", sk);

	add_wait_queue(sk_sleep(sk), &wait);
	while (sk->sk_state != state) {
		set_current_state(TASK_INTERRUPTIBLE);

		if (!timeo) {
			err = -EINPROGRESS;
			break;
		}

		if (signal_pending(current)) {
			err = sock_intr_errno(timeo);
			break;
		}

		release_sock(sk);
		timeo = schedule_timeout(timeo);
		lock_sock(sk);

		err = sock_error(sk);
		if (err)
			break;
	}
	set_current_state(TASK_RUNNING);
	remove_wait_queue(sk_sleep(sk), &wait);
	return err;
}
EXPORT_SYMBOL(bt_sock_wait_state);

static struct net_proto_family bt_sock_family_ops = {
	.owner	= THIS_MODULE,
	.family	= PF_BLUETOOTH,
	.create	= bt_sock_create,
};

static int __init bt_init(void)
{
	int err;

	BT_INFO("Core ver %s", VERSION);

	err = bt_sysfs_init();
	if (err < 0)
		return err;

	err = sock_register(&bt_sock_family_ops);
	if (err < 0) {
		bt_sysfs_cleanup();
		return err;
	}

	BT_INFO("HCI device and connection manager initialized");

	hci_sock_init();

	return 0;
}

static void __exit bt_exit(void)
{
	hci_sock_cleanup();

	sock_unregister(PF_BLUETOOTH);

	bt_sysfs_cleanup();
}

subsys_initcall(bt_init);
module_exit(bt_exit);

MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("Bluetooth Core ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");
MODULE_ALIAS_NETPROTO(PF_BLUETOOTH);
Commit	Line	Data
8e87d142	1	/*
1da177e4 LT	2	BlueZ - Bluetooth protocol stack for Linux
	3	Copyright (C) 2000-2001 Qualcomm Incorporated
	4
	5	Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License version 2 as
	9	published by the Free Software Foundation;
	10
	11	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	12	OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	13	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
	14	IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
8e87d142 YH	15	CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
	16	WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	17	ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1da177e4 LT	18	OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1da177e4 LT	19
8e87d142 YH	20	ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
8e87d142 YH	21	COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4 LT	22	SOFTWARE IS DISCLAIMED.
	23	*/
	24
	25	/* Bluetooth address family and sockets. */
	26
1da177e4 LT	27	#include <linux/module.h>
	28
	29	#include <linux/types.h>
	30	#include <linux/list.h>
	31	#include <linux/errno.h>
	32	#include <linux/kernel.h>
1da177e4	33	#include <linux/sched.h>
1da177e4 LT	34	#include <linux/skbuff.h>
	35	#include <linux/init.h>
	36	#include <linux/poll.h>
1da177e4	37	#include <net/sock.h>
3241ad82	38	#include <asm/ioctls.h>
1da177e4	39	#include <linux/kmod.h>
1da177e4 LT	40
	41	#include <net/bluetooth/bluetooth.h>
	42
5f9018af	43	#define VERSION "2.15"
1da177e4 LT	44
	45	/* Bluetooth sockets */
	46	#define BT_MAX_PROTO 8
ec1b4cf7	47	static const struct net_proto_family *bt_proto[BT_MAX_PROTO];
db7aa1c2	48	static DEFINE_RWLOCK(bt_proto_lock);
68845cb2	49
68845cb2	50	static struct lock_class_key bt_lock_key[BT_MAX_PROTO];
36cbd3dc	51	static const char *const bt_key_strings[BT_MAX_PROTO] = {
68845cb2 DY	52	"sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP",
	53	"sk_lock-AF_BLUETOOTH-BTPROTO_HCI",
	54	"sk_lock-AF_BLUETOOTH-BTPROTO_SCO",
	55	"sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM",
	56	"sk_lock-AF_BLUETOOTH-BTPROTO_BNEP",
	57	"sk_lock-AF_BLUETOOTH-BTPROTO_CMTP",
	58	"sk_lock-AF_BLUETOOTH-BTPROTO_HIDP",
	59	"sk_lock-AF_BLUETOOTH-BTPROTO_AVDTP",
	60	};
	61
db7aa1c2	62	static struct lock_class_key bt_slock_key[BT_MAX_PROTO];
36cbd3dc	63	static const char *const bt_slock_key_strings[BT_MAX_PROTO] = {
68845cb2 DY	64	"slock-AF_BLUETOOTH-BTPROTO_L2CAP",
	65	"slock-AF_BLUETOOTH-BTPROTO_HCI",
	66	"slock-AF_BLUETOOTH-BTPROTO_SCO",
	67	"slock-AF_BLUETOOTH-BTPROTO_RFCOMM",
	68	"slock-AF_BLUETOOTH-BTPROTO_BNEP",
	69	"slock-AF_BLUETOOTH-BTPROTO_CMTP",
	70	"slock-AF_BLUETOOTH-BTPROTO_HIDP",
	71	"slock-AF_BLUETOOTH-BTPROTO_AVDTP",
	72	};
db7aa1c2 MH	73
	74	static inline void bt_sock_reclassify_lock(struct socket *sock, int proto)
	75	{
	76	struct sock *sk = sock->sk;
	77
	78	if (!sk)
	79	return;
	80
	81	BUG_ON(sock_owned_by_user(sk));
	82
	83	sock_lock_init_class_and_name(sk,
	84	bt_slock_key_strings[proto], &bt_slock_key[proto],
	85	bt_key_strings[proto], &bt_lock_key[proto]);
	86	}
1da177e4	87
ec1b4cf7	88	int bt_sock_register(int proto, const struct net_proto_family *ops)
1da177e4	89	{
74da626a MH	90	int err = 0;
74da626a MH	91
1da177e4 LT	92	if (proto < 0 \|\| proto >= BT_MAX_PROTO)
	93	return -EINVAL;
	94
74da626a MH	95	write_lock(&bt_proto_lock);
74da626a MH	96
1da177e4	97	if (bt_proto[proto])
74da626a MH	98	err = -EEXIST;
	99	else
	100	bt_proto[proto] = ops;
	101
	102	write_unlock(&bt_proto_lock);
1da177e4	103
74da626a	104	return err;
1da177e4 LT	105	}
	106	EXPORT_SYMBOL(bt_sock_register);
	107
	108	int bt_sock_unregister(int proto)
	109	{
74da626a MH	110	int err = 0;
74da626a MH	111
1da177e4 LT	112	if (proto < 0 \|\| proto >= BT_MAX_PROTO)
	113	return -EINVAL;
	114
74da626a MH	115	write_lock(&bt_proto_lock);
74da626a MH	116
1da177e4	117	if (!bt_proto[proto])
74da626a MH	118	err = -ENOENT;
	119	else
	120	bt_proto[proto] = NULL;
1da177e4	121
74da626a MH	122	write_unlock(&bt_proto_lock);
	123
	124	return err;
1da177e4 LT	125	}
	126	EXPORT_SYMBOL(bt_sock_unregister);
	127
3f378b68 EP	128	static int bt_sock_create(struct net net, struct socket sock, int proto,
3f378b68 EP	129	int kern)
1da177e4	130	{
74da626a	131	int err;
1da177e4	132
1b8d7ae4 EB	133	if (net != &init_net)
	134	return -EAFNOSUPPORT;
	135
1da177e4 LT	136	if (proto < 0 \|\| proto >= BT_MAX_PROTO)
	137	return -EINVAL;
	138
95a5afca	139	if (!bt_proto[proto])
1da177e4	140	request_module("bt-proto-%d", proto);
74da626a	141
1da177e4	142	err = -EPROTONOSUPPORT;
74da626a MH	143
	144	read_lock(&bt_proto_lock);
	145
1da177e4	146	if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) {
3f378b68	147	err = bt_proto[proto]->create(net, sock, proto, kern);
db7aa1c2	148	bt_sock_reclassify_lock(sock, proto);
1da177e4 LT	149	module_put(bt_proto[proto]->owner);
1da177e4 LT	150	}
74da626a MH	151
	152	read_unlock(&bt_proto_lock);
	153
8e87d142	154	return err;
1da177e4 LT	155	}
	156
	157	void bt_sock_link(struct bt_sock_list l, struct sock sk)
	158	{
	159	write_lock_bh(&l->lock);
	160	sk_add_node(sk, &l->head);
	161	write_unlock_bh(&l->lock);
	162	}
	163	EXPORT_SYMBOL(bt_sock_link);
	164
	165	void bt_sock_unlink(struct bt_sock_list l, struct sock sk)
	166	{
	167	write_lock_bh(&l->lock);
	168	sk_del_node_init(sk);
	169	write_unlock_bh(&l->lock);
	170	}
	171	EXPORT_SYMBOL(bt_sock_unlink);
	172
	173	void bt_accept_enqueue(struct sock parent, struct sock sk)
	174	{
	175	BT_DBG("parent %p, sk %p", parent, sk);
	176
	177	sock_hold(sk);
	178	list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q);
	179	bt_sk(sk)->parent = parent;
	180	parent->sk_ack_backlog++;
	181	}
	182	EXPORT_SYMBOL(bt_accept_enqueue);
	183
	184	void bt_accept_unlink(struct sock *sk)
	185	{
	186	BT_DBG("sk %p state %d", sk, sk->sk_state);
	187
	188	list_del_init(&bt_sk(sk)->accept_q);
	189	bt_sk(sk)->parent->sk_ack_backlog--;
	190	bt_sk(sk)->parent = NULL;
	191	sock_put(sk);
	192	}
	193	EXPORT_SYMBOL(bt_accept_unlink);
	194
	195	struct sock bt_accept_dequeue(struct sock parent, struct socket *newsock)
	196	{
	197	struct list_head p, n;
	198	struct sock *sk;
	199
	200	BT_DBG("parent %p", parent);
	201
	202	list_for_each_safe(p, n, &bt_sk(parent)->accept_q) {
	203	sk = (struct sock *) list_entry(p, struct bt_sock, accept_q);
	204
	205	lock_sock(sk);
	206
	207	/* FIXME: Is this check still needed */
	208	if (sk->sk_state == BT_CLOSED) {
	209	release_sock(sk);
	210	bt_accept_unlink(sk);
	211	continue;
	212	}
	213
c4f912e1 MH	214	if (sk->sk_state == BT_CONNECTED \|\| !newsock \|\|
c4f912e1 MH	215	bt_sk(parent)->defer_setup) {
1da177e4 LT	216	bt_accept_unlink(sk);
	217	if (newsock)
	218	sock_graft(sk, newsock);
	219	release_sock(sk);
	220	return sk;
	221	}
	222
	223	release_sock(sk);
	224	}
	225	return NULL;
	226	}
	227	EXPORT_SYMBOL(bt_accept_dequeue);
	228
	229	int bt_sock_recvmsg(struct kiocb iocb, struct socket sock,
c4f912e1	230	struct msghdr *msg, size_t len, int flags)
1da177e4 LT	231	{
	232	int noblock = flags & MSG_DONTWAIT;
	233	struct sock *sk = sock->sk;
	234	struct sk_buff *skb;
	235	size_t copied;
	236	int err;
	237
a418b893	238	BT_DBG("sock %p sk %p len %zu", sock, sk, len);
1da177e4 LT	239
	240	if (flags & (MSG_OOB))
	241	return -EOPNOTSUPP;
	242
	243	if (!(skb = skb_recv_datagram(sk, flags, noblock, &err))) {
	244	if (sk->sk_shutdown & RCV_SHUTDOWN)
	245	return 0;
	246	return err;
	247	}
	248
	249	msg->msg_namelen = 0;
	250
	251	copied = skb->len;
	252	if (len < copied) {
	253	msg->msg_flags \|= MSG_TRUNC;
	254	copied = len;
	255	}
	256
badff6d0	257	skb_reset_transport_header(skb);
1da177e4	258	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3241ad82	259	if (err == 0)
3b885787	260	sock_recv_ts_and_drops(msg, sk, skb);
1da177e4 LT	261
	262	skb_free_datagram(sk, skb);
	263
	264	return err ? : copied;
	265	}
	266	EXPORT_SYMBOL(bt_sock_recvmsg);
	267
	268	static inline unsigned int bt_accept_poll(struct sock *parent)
	269	{
	270	struct list_head p, n;
	271	struct sock *sk;
	272
	273	list_for_each_safe(p, n, &bt_sk(parent)->accept_q) {
	274	sk = (struct sock *) list_entry(p, struct bt_sock, accept_q);
d5f2d2be MH	275	if (sk->sk_state == BT_CONNECTED \|\|
	276	(bt_sk(parent)->defer_setup &&
	277	sk->sk_state == BT_CONNECT2))
1da177e4 LT	278	return POLLIN \| POLLRDNORM;
	279	}
	280
	281	return 0;
	282	}
	283
	284	unsigned int bt_sock_poll(struct file * file, struct socket sock, poll_table wait)
	285	{
	286	struct sock *sk = sock->sk;
	287	unsigned int mask = 0;
	288
	289	BT_DBG("sock %p, sk %p", sock, sk);
	290
aa395145	291	poll_wait(file, sk_sleep(sk), wait);
1da177e4 LT	292
	293	if (sk->sk_state == BT_LISTEN)
	294	return bt_accept_poll(sk);
	295
	296	if (sk->sk_err \|\| !skb_queue_empty(&sk->sk_error_queue))
	297	mask \|= POLLERR;
	298
f348d70a	299	if (sk->sk_shutdown & RCV_SHUTDOWN)
db40980f	300	mask \|= POLLRDHUP \| POLLIN \| POLLRDNORM;
f348d70a	301
1da177e4 LT	302	if (sk->sk_shutdown == SHUTDOWN_MASK)
	303	mask \|= POLLHUP;
	304
db40980f	305	if (!skb_queue_empty(&sk->sk_receive_queue))
1da177e4 LT	306	mask \|= POLLIN \| POLLRDNORM;
	307
	308	if (sk->sk_state == BT_CLOSED)
	309	mask \|= POLLHUP;
	310
	311	if (sk->sk_state == BT_CONNECT \|\|
	312	sk->sk_state == BT_CONNECT2 \|\|
	313	sk->sk_state == BT_CONFIG)
	314	return mask;
	315
	316	if (sock_writeable(sk))
	317	mask \|= POLLOUT \| POLLWRNORM \| POLLWRBAND;
	318	else
	319	set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
	320
	321	return mask;
	322	}
	323	EXPORT_SYMBOL(bt_sock_poll);
	324
3241ad82 MH	325	int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
	326	{
	327	struct sock *sk = sock->sk;
43cbeee9 MH	328	struct sk_buff *skb;
43cbeee9 MH	329	long amount;
3241ad82 MH	330	int err;
	331
	332	BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);
	333
	334	switch (cmd) {
43cbeee9 MH	335	case TIOCOUTQ:
	336	if (sk->sk_state == BT_LISTEN)
	337	return -EINVAL;
	338
31e6d363	339	amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
43cbeee9 MH	340	if (amount < 0)
	341	amount = 0;
	342	err = put_user(amount, (int __user *) arg);
	343	break;
	344
	345	case TIOCINQ:
	346	if (sk->sk_state == BT_LISTEN)
	347	return -EINVAL;
	348
	349	lock_sock(sk);
	350	skb = skb_peek(&sk->sk_receive_queue);
	351	amount = skb ? skb->len : 0;
	352	release_sock(sk);
	353	err = put_user(amount, (int __user *) arg);
	354	break;
	355
3241ad82 MH	356	case SIOCGSTAMP:
	357	err = sock_get_timestamp(sk, (struct timeval __user *) arg);
	358	break;
	359
	360	case SIOCGSTAMPNS:
	361	err = sock_get_timestampns(sk, (struct timespec __user *) arg);
	362	break;
	363
	364	default:
	365	err = -ENOIOCTLCMD;
	366	break;
	367	}
	368
	369	return err;
	370	}
	371	EXPORT_SYMBOL(bt_sock_ioctl);
	372
1da177e4 LT	373	int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
	374	{
	375	DECLARE_WAITQUEUE(wait, current);
	376	int err = 0;
	377
	378	BT_DBG("sk %p", sk);
	379
aa395145	380	add_wait_queue(sk_sleep(sk), &wait);
1da177e4 LT	381	while (sk->sk_state != state) {
	382	set_current_state(TASK_INTERRUPTIBLE);
	383
	384	if (!timeo) {
b4c612a4	385	err = -EINPROGRESS;
1da177e4 LT	386	break;
	387	}
	388
	389	if (signal_pending(current)) {
	390	err = sock_intr_errno(timeo);
	391	break;
	392	}
	393
	394	release_sock(sk);
	395	timeo = schedule_timeout(timeo);
	396	lock_sock(sk);
	397
c1cbe4b7 BL	398	err = sock_error(sk);
c1cbe4b7 BL	399	if (err)
1da177e4	400	break;
1da177e4 LT	401	}
1da177e4 LT	402	set_current_state(TASK_RUNNING);
aa395145	403	remove_wait_queue(sk_sleep(sk), &wait);
1da177e4 LT	404	return err;
	405	}
	406	EXPORT_SYMBOL(bt_sock_wait_state);
	407
	408	static struct net_proto_family bt_sock_family_ops = {
	409	.owner = THIS_MODULE,
	410	.family = PF_BLUETOOTH,
	411	.create = bt_sock_create,
	412	};
	413
1da177e4 LT	414	static int __init bt_init(void)
1da177e4 LT	415	{
27d35284 MH	416	int err;
27d35284 MH	417
1da177e4 LT	418	BT_INFO("Core ver %s", VERSION);
1da177e4 LT	419
27d35284 MH	420	err = bt_sysfs_init();
	421	if (err < 0)
	422	return err;
1da177e4	423
27d35284 MH	424	err = sock_register(&bt_sock_family_ops);
	425	if (err < 0) {
	426	bt_sysfs_cleanup();
	427	return err;
	428	}
1da177e4	429
27d35284	430	BT_INFO("HCI device and connection manager initialized");
1da177e4 LT	431
	432	hci_sock_init();
	433
	434	return 0;
	435	}
	436
	437	static void __exit bt_exit(void)
	438	{
	439	hci_sock_cleanup();
	440
1da177e4	441	sock_unregister(PF_BLUETOOTH);
27d35284 MH	442
27d35284 MH	443	bt_sysfs_cleanup();
1da177e4 LT	444	}
	445
	446	subsys_initcall(bt_init);
	447	module_exit(bt_exit);
	448
63fbd24e	449	MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
1da177e4 LT	450	MODULE_DESCRIPTION("Bluetooth Core ver " VERSION);
	451	MODULE_VERSION(VERSION);
	452	MODULE_LICENSE("GPL");
	453	MODULE_ALIAS_NETPROTO(PF_BLUETOOTH);