Release 4.18 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/debugfs.h>
#include <linux/stringify.h>
#include <linux/sched/signal.h>

#include <asm/ioctls.h>

#include <net/bluetooth/bluetooth.h>
#include <linux/proc_fs.h>

#include "leds.h"
#include "selftest.h"

/* 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",
};



void bt_sock_reclassify_lock(struct sock *sk, int proto)
{
	BUG_ON(!sk);
	BUG_ON(!sock_allow_reclassification(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]);
}
Contributors
Person
Tokens
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Commits
CommitProp
Marcel Holtmann
47
85.45%
2
50.00%
Octavian Purdila
6
10.91%
1
25.00%
Hannes Frederic Sowa
2
3.64%
1
25.00%
Total
55
100.00%
4
100.00%

EXPORT_SYMBOL(bt_sock_reclassify_lock);



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;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds
36
52.94%
1
16.67%
Marcel Holtmann
22
32.35%
1
16.67%
Maksim Krasnyanskiy
5
7.35%
2
33.33%
Marcus Meissner
4
5.88%
1
16.67%
Stephen Hemminger
1
1.47%
1
16.67%
Total
68
100.00%
6
100.00%

EXPORT_SYMBOL(bt_sock_register);



void bt_sock_unregister(int proto)
{
	if (proto < 0 || proto >= BT_MAX_PROTO)
		return;

	write_lock(&bt_proto_lock);
	bt_proto[proto] = NULL;
	write_unlock(&bt_proto_lock);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds
16
42.11%
1
16.67%
Marcel Holtmann
12
31.58%
1
16.67%
Marcus Meissner
4
10.53%
1
16.67%
Maksim Krasnyanskiy
4
10.53%
2
33.33%
David Herrmann
2
5.26%
1
16.67%
Total
38
100.00%
6
100.00%

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);
		if (!err)
			bt_sock_reclassify_lock(sock->sk, proto);
		module_put(bt_proto[proto]->owner);
	}

	read_unlock(&bt_proto_lock);

	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds
52
35.62%
2
16.67%
Maksim Krasnyanskiy
40
27.40%
2
16.67%
Eric W. Biedermann
18
12.33%
1
8.33%
Marcel Holtmann
13
8.90%
2
16.67%
Octavian Purdila
7
4.79%
1
8.33%
Dave Young
6
4.11%
1
8.33%
Eric Paris
5
3.42%
1
8.33%
Marcus Meissner
4
2.74%
1
8.33%
Randy Dunlap
1
0.68%
1
8.33%
Total
146
100.00%
12
100.00%



void bt_sock_link(struct bt_sock_list *l, struct sock *sk)
{
	write_lock(&l->lock);
	sk_add_node(sk, &l->head);
	write_unlock(&l->lock);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds
32
78.05%
1
25.00%
Arnaldo Carvalho de Melo
5
12.20%
1
25.00%
Maksim Krasnyanskiy
2
4.88%
1
25.00%
Gustavo Fernando Padovan
2
4.88%
1
25.00%
Total
41
100.00%
4
100.00%

EXPORT_SYMBOL(bt_sock_link);



void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk)
{
	write_lock(&l->lock);
	sk_del_node_init(sk);
	write_unlock(&l->lock);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds
29
80.56%
1
25.00%
Arnaldo Carvalho de Melo
3
8.33%
1
25.00%
Gustavo Fernando Padovan
2
5.56%
1
25.00%
Maksim Krasnyanskiy
2
5.56%
1
25.00%
Total
36
100.00%
4
100.00%

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);
	lock_sock(sk);
	list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q);
	bt_sk(sk)->parent = parent;
	release_sock(sk);
	parent->sk_ack_backlog++;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
42
58.33%
2
40.00%
Linus Torvalds
19
26.39%
1
20.00%
Dean Jenkins
10
13.89%
1
20.00%
Arnaldo Carvalho de Melo
1
1.39%
1
20.00%
Total
72
100.00%
5
100.00%

EXPORT_SYMBOL(bt_accept_enqueue);

/* Calling function must hold the sk lock.
 * bt_sk(sk)->parent must be non-NULL meaning sk is in the parent list.
 */


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);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
45
80.36%
2
50.00%
Linus Torvalds
9
16.07%
1
25.00%
Arnaldo Carvalho de Melo
2
3.57%
1
25.00%
Total
56
100.00%
4
100.00%

EXPORT_SYMBOL(bt_accept_unlink);



struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock)
{
	struct bt_sock *s, *n;
	struct sock *sk;

	BT_DBG("parent %p", parent);

restart:
	list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) {
		sk = (struct sock *)s;

		/* Prevent early freeing of sk due to unlink and sock_kill */
		sock_hold(sk);
		lock_sock(sk);

		/* Check sk has not already been unlinked via
                 * bt_accept_unlink() due to serialisation caused by sk locking
                 */
		if (!bt_sk(sk)->parent) {
			BT_DBG("sk %p, already unlinked", sk);
			release_sock(sk);
			sock_put(sk);

			/* Restart the loop as sk is no longer in the list
                         * and also avoid a potential infinite loop because
                         * list_for_each_entry_safe() is not thread safe.
                         */
			goto restart;
		}

		/* sk is safely in the parent list so reduce reference count */
		sock_put(sk);

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

		if (sk->sk_state == BT_CONNECTED || !newsock ||
		    test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) {
			bt_accept_unlink(sk);
			if (newsock)
				sock_graft(sk, newsock);

			release_sock(sk);
			return sk;
		}

		release_sock(sk);
	}

	return NULL;
}
Contributors
Person
Tokens
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CommitProp
Maksim Krasnyanskiy
115
60.21%
2
18.18%
Dean Jenkins
48
25.13%
1
9.09%
Gustavo Fernando Padovan
9
4.71%
2
18.18%
Geliang Tang
7
3.66%
1
9.09%
Marcel Holtmann
7
3.66%
2
18.18%
Yichen Zhao
2
1.05%
1
9.09%
Arnaldo Carvalho de Melo
2
1.05%
1
9.09%
Vinicius Costa Gomes
1
0.52%
1
9.09%
Total
191
100.00%
11
100.00%

EXPORT_SYMBOL(bt_accept_dequeue);



int bt_sock_recvmsg(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;
	size_t skblen;
	int err;

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

	if (flags & MSG_OOB)
		return -EOPNOTSUPP;

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

		return err;
	}

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

	skb_reset_transport_header(skb);
	err = skb_copy_datagram_msg(skb, 0, msg, copied);
	if (err == 0) {
		sock_recv_ts_and_drops(msg, sk, skb);

		if (msg->msg_name && bt_sk(sk)->skb_msg_name)
			bt_sk(sk)->skb_msg_name(skb, msg->msg_name,
						&msg->msg_namelen);
	}

	skb_free_datagram(sk, skb);

	if (flags & MSG_TRUNC)
		copied = skblen;

	return err ? : copied;
}
Contributors
Person
Tokens
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CommitProp
Maksim Krasnyanskiy
144
63.44%
2
14.29%
Marcel Holtmann
45
19.82%
3
21.43%
Denis Kenzior
18
7.93%
1
7.14%
Andrei Emeltchenko
5
2.20%
1
7.14%
Stephen Hemminger
4
1.76%
1
7.14%
Ezequiel García
4
1.76%
1
7.14%
Arnaldo Carvalho de Melo
4
1.76%
2
14.29%
Neil Horman
1
0.44%
1
7.14%
Luiz Augusto von Dentz
1
0.44%
1
7.14%
David S. Miller
1
0.44%
1
7.14%
Total
227
100.00%
14
100.00%

EXPORT_SYMBOL(bt_sock_recvmsg);



static long bt_sock_data_wait(struct sock *sk, long timeo)
{
	DECLARE_WAITQUEUE(wait, current);

	add_wait_queue(sk_sleep(sk), &wait);
	for (;;) {
		set_current_state(TASK_INTERRUPTIBLE);

		if (!skb_queue_empty(&sk->sk_receive_queue))
			break;

		if (sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN))
			break;

		if (signal_pending(current) || !timeo)
			break;

		sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
		release_sock(sk);
		timeo = schedule_timeout(timeo);
		lock_sock(sk);
		sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
	}

	__set_current_state(TASK_RUNNING);
	remove_wait_queue(sk_sleep(sk), &wait);
	return timeo;
}

Contributors
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Mat Martineau
128
96.97%
1
50.00%
Eric Dumazet
4
3.03%
1
50.00%
Total
132
100.00%
2
100.00%



int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
			   size_t size, int flags)
{
	struct sock *sk = sock->sk;
	int err = 0;
	size_t target, copied = 0;
	long timeo;

	if (flags & MSG_OOB)
		return -EOPNOTSUPP;

	BT_DBG("sk %p size %zu", sk, size);

	lock_sock(sk);

	target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
	timeo  = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);

	do {
		struct sk_buff *skb;
		int chunk;

		skb = skb_dequeue(&sk->sk_receive_queue);
		if (!skb) {
			if (copied >= target)
				break;

			err = sock_error(sk);
			if (err)
				break;
			if (sk->sk_shutdown & RCV_SHUTDOWN)
				break;

			err = -EAGAIN;
			if (!timeo)
				break;

			timeo = bt_sock_data_wait(sk, timeo);

			if (signal_pending(current)) {
				err = sock_intr_errno(timeo);
				goto out;
			}
			continue;
		}

		chunk = min_t(unsigned int, skb->len, size);
		if (skb_copy_datagram_msg(skb, 0, msg, chunk)) {
			skb_queue_head(&sk->sk_receive_queue, skb);
			if (!copied)
				copied = -EFAULT;
			break;
		}
		copied += chunk;
		size   -= chunk;

		sock_recv_ts_and_drops(msg, sk, skb);

		if (!(flags & MSG_PEEK)) {
			int skb_len = skb_headlen(skb);

			if (chunk <= skb_len) {
				__skb_pull(skb, chunk);
			} else {
				struct sk_buff *frag;

				__skb_pull(skb, skb_len);
				chunk -= skb_len;

				skb_walk_frags(skb, frag) {
					if (chunk <= frag->len) {
						/* Pulling partial data */
						skb->len -= chunk;
						skb->data_len -= chunk;
						__skb_pull(frag, chunk);
						break;
					} else if (frag->len) {
						/* Pulling all frag data */
						chunk -= frag->len;
						skb->len -= frag->len;
						skb->data_len -= frag->len;
						__skb_pull(frag, frag->len);
					}
				}
			}

			if (skb->len) {
				skb_queue_head(&sk->sk_receive_queue, skb);
				break;
			}
			kfree_skb(skb);

		} else {
			/* put message back and return */
			skb_queue_head(&sk->sk_receive_queue, skb);
			break;
		}
	} while (size);

out:
	release_sock(sk);
	return copied ? : err;
}
Contributors
Person
Tokens
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Commits
CommitProp
Mat Martineau
438
98.87%
2
50.00%
Andrei Emeltchenko
4
0.90%
1
25.00%
David S. Miller
1
0.23%
1
25.00%
Total
443
100.00%
4
100.00%

EXPORT_SYMBOL(bt_sock_stream_recvmsg);



static inline __poll_t bt_accept_poll(struct sock *parent)
{
	struct bt_sock *s, *n;
	struct sock *sk;

	list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) {
		sk = (struct sock *)s;
		if (sk->sk_state == BT_CONNECTED ||
		    (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) &&
		     sk->sk_state == BT_CONNECT2))
			return EPOLLIN | EPOLLRDNORM;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
66
79.52%
2
33.33%
Gustavo Fernando Padovan
7
8.43%
1
16.67%
Geliang Tang
7
8.43%
1
16.67%
Linus Torvalds
2
2.41%
1
16.67%
Al Viro
1
1.20%
1
16.67%
Total
83
100.00%
6
100.00%



__poll_t bt_sock_poll(struct file *file, struct socket *sock,
			  poll_table *wait)
{
	struct sock *sk = sock->sk;
	__poll_t 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 |= EPOLLERR |
			(sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);

	if (sk->sk_shutdown & RCV_SHUTDOWN)
		mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;

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

	if (!skb_queue_empty(&sk->sk_receive_queue))
		mask |= EPOLLIN | EPOLLRDNORM;

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

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

	if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk))
		mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND;
	else
		sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);

	return mask;
}
Contributors
Person
Tokens
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CommitProp
Maksim Krasnyanskiy
100
45.45%
1
7.14%
Linus Torvalds
33
15.00%
2
14.29%
Marcel Holtmann
22
10.00%
1
7.14%
Maxim Krasnyansky
15
6.82%
1
7.14%
Gustavo Fernando Padovan
14
6.36%
2
14.29%
Jacob E Keller
12
5.45%
2
14.29%
Davide Libenzi
11
5.00%
1
7.14%
Arnaldo Carvalho de Melo
7
3.18%
1
7.14%
Eric Dumazet
4
1.82%
2
14.29%
Al Viro
2
0.91%
1
7.14%
Total
220
100.00%
14
100.00%

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;
}
Contributors
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Marcel Holtmann
213
99.53%
2
66.67%
Eric Dumazet
1
0.47%
1
33.33%
Total
214
100.00%
3
100.00%

EXPORT_SYMBOL(bt_sock_ioctl);

/* This function expects the sk lock to be held when called */


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);
	set_current_state(TASK_INTERRUPTIBLE);
	while (sk->sk_state != state) {
		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);
		set_current_state(TASK_INTERRUPTIBLE);

		err = sock_error(sk);
		if (err)
			break;
	}
	__set_current_state(TASK_RUNNING);
	remove_wait_queue(sk_sleep(sk), &wait);
	return err;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
120
82.76%
2
28.57%
Peter Hurley
11
7.59%
1
14.29%
Eric Dumazet
6
4.14%
1
14.29%
Benjamin LaHaise
4
2.76%
1
14.29%
Arnaldo Carvalho de Melo
3
2.07%
1
14.29%
Marcel Holtmann
1
0.69%
1
14.29%
Total
145
100.00%
7
100.00%

EXPORT_SYMBOL(bt_sock_wait_state);

/* This function expects the sk lock to be held when called */


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

	BT_DBG("sk %p", sk);

	timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);

	add_wait_queue(sk_sleep(sk), &wait);
	set_current_state(TASK_INTERRUPTIBLE);
	while (test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags)) {
		if (!timeo) {
			err = -EAGAIN;
			break;
		}

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

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

		err = sock_error(sk);
		if (err)
			break;
	}
	__set_current_state(TASK_RUNNING);
	remove_wait_queue(sk_sleep(sk), &wait);

	return err;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hedberg
164
100.00%
1
100.00%
Total
164
100.00%
1
100.00%

EXPORT_SYMBOL(bt_sock_wait_ready);

#ifdef CONFIG_PROC_FS


static void *bt_seq_start(struct seq_file *seq, loff_t *pos)
	__acquires(seq->private->l->lock)
{
	struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));

	read_lock(&l->lock);
	return seq_hlist_start_head(&l->head, *pos);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Masatake YAMATO
53
86.89%
1
50.00%
Christoph Hellwig
8
13.11%
1
50.00%
Total
61
100.00%
2
100.00%



static void *bt_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));

	return seq_hlist_next(v, &l->head, pos);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Masatake YAMATO
40
83.33%
1
50.00%
Christoph Hellwig
8
16.67%
1
50.00%
Total
48
100.00%
2
100.00%



static void bt_seq_stop(struct seq_file *seq, void *v)
	__releases(seq->private->l->lock)
{
	struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));

	read_unlock(&l->lock);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Masatake YAMATO
40
83.33%
1
50.00%
Christoph Hellwig
8
16.67%
1
50.00%
Total
48
100.00%
2
100.00%



static int bt_seq_show(struct seq_file *seq, void *v)
{
	struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));

	if (v == SEQ_START_TOKEN) {
		seq_puts(seq ,"sk               RefCnt Rmem   Wmem   User   Inode  Parent");

		if (l->custom_seq_show) {
			seq_putc(seq, ' ');
			l->custom_seq_show(seq, v);
		}

		seq_putc(seq, '\n');
	} else {
		struct sock *sk = sk_entry(v);
		struct bt_sock *bt = bt_sk(sk);

		seq_printf(seq,
			   "%pK %-6d %-6u %-6u %-6u %-6lu %-6lu",
			   sk,
			   refcount_read(&sk->sk_refcnt),
			   sk_rmem_alloc_get(sk),
			   sk_wmem_alloc_get(sk),
			   from_kuid(seq_user_ns(seq), sock_i_uid(sk)),
			   sock_i_ino(sk),
			   bt->parent? sock_i_ino(bt->parent): 0LU);

		if (l->custom_seq_show) {
			seq_putc(seq, ' ');
			l->custom_seq_show(seq, v);
		}

		seq_putc(seq, '\n');
	}
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Masatake YAMATO
162
84.82%
1
14.29%
Andrei Emeltchenko
10
5.24%
1
14.29%
Eric W. Biedermann
8
4.19%
1
14.29%
Christoph Hellwig
8
4.19%
1
14.29%
Marcel Holtmann
2
1.05%
2
28.57%
Elena Reshetova
1
0.52%
1
14.29%
Total
191
100.00%
7
100.00%


static const struct seq_operations bt_seq_ops = {
	.start = bt_seq_start,
	.next  = bt_seq_next,
	.stop  = bt_seq_stop,
	.show  = bt_seq_show,
};



int bt_procfs_init(struct net *net, const char *name,
		   struct bt_sock_list *sk_list,
		   int (* seq_show)(struct seq_file *, void *))
{
	sk_list->custom_seq_show = seq_show;

	if (!proc_create_seq_data(name, 0, net->proc_net, &bt_seq_ops, sk_list))
		return -ENOMEM;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Masatake YAMATO
56
84.85%
1
25.00%
Gao Feng
4
6.06%
1
25.00%
Al Viro
4
6.06%
1
25.00%
Christoph Hellwig
2
3.03%
1
25.00%
Total
66
100.00%
4
100.00%



void bt_procfs_cleanup(struct net *net, const char *name)
{
	remove_proc_entry(name, net->proc_net);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Masatake YAMATO
19
79.17%
1
50.00%
Gao Feng
5
20.83%
1
50.00%
Total
24
100.00%
2
100.00%

#else


int bt_procfs_init(struct net *net, const char *name,
		   struct bt_sock_list *sk_list,
		   int (* seq_show)(struct seq_file *, void *))
{
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Masatake YAMATO
37
100.00%
1
100.00%
Total
37
100.00%
1
100.00%



void bt_procfs_cleanup(struct net *net, const char *name)
{
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Masatake YAMATO
14
100.00%
1
100.00%
Total
14
100.00%
1
100.00%

#endif
EXPORT_SYMBOL(bt_procfs_init);
EXPORT_SYMBOL(bt_procfs_cleanup);


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


struct dentry *bt_debugfs;
EXPORT_SYMBOL_GPL(bt_debugfs);


#define VERSION __stringify(BT_SUBSYS_VERSION) "." \
                __stringify(BT_SUBSYS_REVISION)



static int __init bt_init(void)
{
	int err;

	sock_skb_cb_check_size(sizeof(struct bt_skb_cb));

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

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

	bt_debugfs = debugfs_create_dir("bluetooth", NULL);

	bt_leds_init();

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

	err = sock_register(&bt_sock_family_ops);
	if (err)
		goto cleanup_sysfs;

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

	err = hci_sock_init();
	if (err)
		goto unregister_socket;

	err = l2cap_init();
	if (err)
		goto cleanup_socket;

	err = sco_init();
	if (err)
		goto cleanup_cap;

	err = mgmt_init();
	if (err)
		goto cleanup_sco;

	return 0;

cleanup_sco:
	sco_exit();
cleanup_cap:
	l2cap_exit();
cleanup_socket:
	hci_sock_cleanup();
unregister_socket:
	sock_unregister(PF_BLUETOOTH);
cleanup_sysfs:
	bt_sysfs_cleanup();
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
58
34.32%
6
46.15%
Gustavo Fernando Padovan
46
27.22%
1
7.69%
Maksim Krasnyanskiy
29
17.16%
3
23.08%
SF Markus Elfring
20
11.83%
1
7.69%
Johan Hedberg
15
8.88%
1
7.69%
Eyal Birger
1
0.59%
1
7.69%
Total
169
100.00%
13
100.00%



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

	sco_exit();

	l2cap_exit();

	hci_sock_cleanup();

	sock_unregister(PF_BLUETOOTH);

	bt_sysfs_cleanup();

	bt_leds_cleanup();

	debugfs_remove_recursive(bt_debugfs);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
15
40.54%
1
12.50%
Marcel Holtmann
12
32.43%
4
50.00%
Gustavo Fernando Padovan
6
16.22%
1
12.50%
Johan Hedberg
3
8.11%
1
12.50%
Linus Torvalds
1
2.70%
1
12.50%
Total
37
100.00%
8
100.00%

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);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
690
20.66%
7
7.07%
Marcel Holtmann
625
18.72%
25
25.25%
Mat Martineau
571
17.10%
2
2.02%
Masatake YAMATO
468
14.02%
1
1.01%
Linus Torvalds
261
7.82%
5
5.05%
Johan Hedberg
189
5.66%
3
3.03%
Gustavo Fernando Padovan
86
2.58%
5
5.05%
Dave Young
69
2.07%
1
1.01%
Dean Jenkins
59
1.77%
2
2.02%
Arnaldo Carvalho de Melo
34
1.02%
4
4.04%
Christoph Hellwig
34
1.02%
1
1.01%
Eric W. Biedermann
26
0.78%
2
2.02%
SF Markus Elfring
20
0.60%
1
1.01%
Andrei Emeltchenko
19
0.57%
2
2.02%
Denis Kenzior
18
0.54%
1
1.01%
Octavian Purdila
18
0.54%
1
1.01%
Maxim Krasnyansky
15
0.45%
1
1.01%
Eric Dumazet
15
0.45%
4
4.04%
Geliang Tang
14
0.42%
1
1.01%
Jacob E Keller
12
0.36%
2
2.02%
Marcus Meissner
12
0.36%
1
1.01%
Davide Libenzi
11
0.33%
1
1.01%
Stephen Hemminger
11
0.33%
3
3.03%
Peter Hurley
11
0.33%
1
1.01%
Gao Feng
9
0.27%
2
2.02%
Al Viro
7
0.21%
2
2.02%
Eric Paris
5
0.15%
1
1.01%
Ezequiel García
4
0.12%
1
1.01%
Benjamin LaHaise
4
0.12%
1
1.01%
Ingo Molnar
3
0.09%
1
1.01%
David Herrmann
2
0.06%
1
1.01%
Jan Engelhardt
2
0.06%
1
1.01%
Hannes Frederic Sowa
2
0.06%
1
1.01%
Yichen Zhao
2
0.06%
1
1.01%
David S. Miller
2
0.06%
1
1.01%
Elena Reshetova
1
0.03%
1
1.01%
Luiz Augusto von Dentz
1
0.03%
1
1.01%
Neil Horman
1
0.03%
1
1.01%
Eyal Birger
1
0.03%
1
1.01%
Fabian Frederick
1
0.03%
1
1.01%
Randy Dunlap
1
0.03%
1
1.01%
Lin Zhang
1
0.03%
1
1.01%
Hideaki Yoshifuji / 吉藤英明
1
0.03%
1
1.01%
Vinicius Costa Gomes
1
0.03%
1
1.01%
Ying Xue
0.00%
0
0.00%
Total
3339
100.00%
99
100.00%
Directory: net/bluetooth

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