mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
![Gustavo Padovan](/assets/img/avatar_default.png)
sco_chan_del() only has conn != NULL when called from sco_conn_del() so just move the code from it that deal with conn to sco_conn_del(). [ 120.765529] [ 120.765529] ====================================================== [ 120.766529] [ INFO: possible circular locking dependency detected ] [ 120.766529] 3.5.0-rc1-10292-g3701f94-dirty #70 Tainted: G W [ 120.766529] ------------------------------------------------------- [ 120.766529] kworker/u:3/1497 is trying to acquire lock: [ 120.766529] (&(&conn->lock)->rlock#2){+.+...}, at: [<ffffffffa00b7ecc>] sco_chan_del+0x4c/0x170 [bluetooth] [ 120.766529] [ 120.766529] but task is already holding lock: [ 120.766529] (slock-AF_BLUETOOTH-BTPROTO_SCO){+.+...}, at: [<ffffffffa00b8401>] sco_conn_del+0x61/0xe0 [bluetooth] [ 120.766529] [ 120.766529] which lock already depends on the new lock. [ 120.766529] [ 120.766529] [ 120.766529] the existing dependency chain (in reverse order) is: [ 120.766529] [ 120.766529] -> #1 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.+...}: [ 120.766529] [<ffffffff8107980e>] lock_acquire+0x8e/0xb0 [ 120.766529] [<ffffffff813c19e0>] _raw_spin_lock+0x40/0x80 [ 120.766529] [<ffffffffa00b85e9>] sco_connect_cfm+0x79/0x300 [bluetooth] [ 120.766529] [<ffffffffa0094b13>] hci_sync_conn_complete_evt.isra.90+0x343/0x400 [bluetooth] [ 120.766529] [<ffffffffa009d447>] hci_event_packet+0x317/0xfb0 [bluetooth] [ 120.766529] [<ffffffffa008aa68>] hci_rx_work+0x2c8/0x890 [bluetooth] [ 120.766529] [<ffffffff81047db7>] process_one_work+0x197/0x460 [ 120.766529] [<ffffffff810489d6>] worker_thread+0x126/0x2d0 [ 120.766529] [<ffffffff8104ee4d>] kthread+0x9d/0xb0 [ 120.766529] [<ffffffff813c4294>] kernel_thread_helper+0x4/0x10 [ 120.766529] [ 120.766529] -> #0 (&(&conn->lock)->rlock#2){+.+...}: [ 120.766529] [<ffffffff81078a8a>] __lock_acquire+0x154a/0x1d30 [ 120.766529] [<ffffffff8107980e>] lock_acquire+0x8e/0xb0 [ 120.766529] [<ffffffff813c19e0>] _raw_spin_lock+0x40/0x80 [ 120.766529] [<ffffffffa00b7ecc>] sco_chan_del+0x4c/0x170 [bluetooth] [ 120.766529] [<ffffffffa00b8414>] sco_conn_del+0x74/0xe0 [bluetooth] [ 120.766529] [<ffffffffa00b88a2>] sco_disconn_cfm+0x32/0x60 [bluetooth] [ 120.766529] [<ffffffffa0093a82>] hci_disconn_complete_evt.isra.53+0x242/0x390 [bluetooth] [ 120.766529] [<ffffffffa009d747>] hci_event_packet+0x617/0xfb0 [bluetooth] [ 120.766529] [<ffffffffa008aa68>] hci_rx_work+0x2c8/0x890 [bluetooth] [ 120.766529] [<ffffffff81047db7>] process_one_work+0x197/0x460 [ 120.766529] [<ffffffff810489d6>] worker_thread+0x126/0x2d0 [ 120.766529] [<ffffffff8104ee4d>] kthread+0x9d/0xb0 [ 120.766529] [<ffffffff813c4294>] kernel_thread_helper+0x4/0x10 [ 120.766529] [ 120.766529] other info that might help us debug this: [ 120.766529] [ 120.766529] Possible unsafe locking scenario: [ 120.766529] [ 120.766529] CPU0 CPU1 [ 120.766529] ---- ---- [ 120.766529] lock(slock-AF_BLUETOOTH-BTPROTO_SCO); [ 120.766529] lock(&(&conn->lock)->rlock#2); [ 120.766529] lock(slock-AF_BLUETOOTH-BTPROTO_SCO); [ 120.766529] lock(&(&conn->lock)->rlock#2); [ 120.766529] [ 120.766529] *** DEADLOCK *** Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
1055 lines
20 KiB
C
1055 lines
20 KiB
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 SCO sockets. */
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/seq_file.h>
|
|
|
|
#include <net/bluetooth/bluetooth.h>
|
|
#include <net/bluetooth/hci_core.h>
|
|
#include <net/bluetooth/sco.h>
|
|
|
|
static bool disable_esco;
|
|
|
|
static const struct proto_ops sco_sock_ops;
|
|
|
|
static struct bt_sock_list sco_sk_list = {
|
|
.lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock)
|
|
};
|
|
|
|
static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent);
|
|
static void sco_chan_del(struct sock *sk, int err);
|
|
|
|
static void sco_sock_close(struct sock *sk);
|
|
static void sco_sock_kill(struct sock *sk);
|
|
|
|
/* ---- SCO timers ---- */
|
|
static void sco_sock_timeout(unsigned long arg)
|
|
{
|
|
struct sock *sk = (struct sock *) arg;
|
|
|
|
BT_DBG("sock %p state %d", sk, sk->sk_state);
|
|
|
|
bh_lock_sock(sk);
|
|
sk->sk_err = ETIMEDOUT;
|
|
sk->sk_state_change(sk);
|
|
bh_unlock_sock(sk);
|
|
|
|
sco_sock_kill(sk);
|
|
sock_put(sk);
|
|
}
|
|
|
|
static void sco_sock_set_timer(struct sock *sk, long timeout)
|
|
{
|
|
BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
|
|
sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
|
|
}
|
|
|
|
static void sco_sock_clear_timer(struct sock *sk)
|
|
{
|
|
BT_DBG("sock %p state %d", sk, sk->sk_state);
|
|
sk_stop_timer(sk, &sk->sk_timer);
|
|
}
|
|
|
|
/* ---- SCO connections ---- */
|
|
static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
|
|
{
|
|
struct hci_dev *hdev = hcon->hdev;
|
|
struct sco_conn *conn = hcon->sco_data;
|
|
|
|
if (conn)
|
|
return conn;
|
|
|
|
conn = kzalloc(sizeof(struct sco_conn), GFP_ATOMIC);
|
|
if (!conn)
|
|
return NULL;
|
|
|
|
spin_lock_init(&conn->lock);
|
|
|
|
hcon->sco_data = conn;
|
|
conn->hcon = hcon;
|
|
|
|
conn->src = &hdev->bdaddr;
|
|
conn->dst = &hcon->dst;
|
|
|
|
if (hdev->sco_mtu > 0)
|
|
conn->mtu = hdev->sco_mtu;
|
|
else
|
|
conn->mtu = 60;
|
|
|
|
BT_DBG("hcon %p conn %p", hcon, conn);
|
|
|
|
return conn;
|
|
}
|
|
|
|
static struct sock *sco_chan_get(struct sco_conn *conn)
|
|
{
|
|
struct sock *sk = NULL;
|
|
sco_conn_lock(conn);
|
|
sk = conn->sk;
|
|
sco_conn_unlock(conn);
|
|
return sk;
|
|
}
|
|
|
|
static int sco_conn_del(struct hci_conn *hcon, int err)
|
|
{
|
|
struct sco_conn *conn = hcon->sco_data;
|
|
struct sock *sk;
|
|
|
|
if (!conn)
|
|
return 0;
|
|
|
|
BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
|
|
|
|
/* Kill socket */
|
|
sk = sco_chan_get(conn);
|
|
if (sk) {
|
|
bh_lock_sock(sk);
|
|
sco_sock_clear_timer(sk);
|
|
sco_chan_del(sk, err);
|
|
bh_unlock_sock(sk);
|
|
|
|
sco_conn_lock(conn);
|
|
conn->sk = NULL;
|
|
sco_pi(sk)->conn = NULL;
|
|
sco_conn_unlock(conn);
|
|
|
|
if (conn->hcon)
|
|
hci_conn_put(conn->hcon);
|
|
|
|
sco_sock_kill(sk);
|
|
}
|
|
|
|
hcon->sco_data = NULL;
|
|
kfree(conn);
|
|
return 0;
|
|
}
|
|
|
|
static int sco_chan_add(struct sco_conn *conn, struct sock *sk,
|
|
struct sock *parent)
|
|
{
|
|
int err = 0;
|
|
|
|
sco_conn_lock(conn);
|
|
if (conn->sk)
|
|
err = -EBUSY;
|
|
else
|
|
__sco_chan_add(conn, sk, parent);
|
|
|
|
sco_conn_unlock(conn);
|
|
return err;
|
|
}
|
|
|
|
static int sco_connect(struct sock *sk)
|
|
{
|
|
bdaddr_t *src = &bt_sk(sk)->src;
|
|
bdaddr_t *dst = &bt_sk(sk)->dst;
|
|
struct sco_conn *conn;
|
|
struct hci_conn *hcon;
|
|
struct hci_dev *hdev;
|
|
int err, type;
|
|
|
|
BT_DBG("%s -> %s", batostr(src), batostr(dst));
|
|
|
|
hdev = hci_get_route(dst, src);
|
|
if (!hdev)
|
|
return -EHOSTUNREACH;
|
|
|
|
hci_dev_lock(hdev);
|
|
|
|
if (lmp_esco_capable(hdev) && !disable_esco)
|
|
type = ESCO_LINK;
|
|
else
|
|
type = SCO_LINK;
|
|
|
|
hcon = hci_connect(hdev, type, dst, BDADDR_BREDR, BT_SECURITY_LOW,
|
|
HCI_AT_NO_BONDING);
|
|
if (IS_ERR(hcon)) {
|
|
err = PTR_ERR(hcon);
|
|
goto done;
|
|
}
|
|
|
|
conn = sco_conn_add(hcon);
|
|
if (!conn) {
|
|
hci_conn_put(hcon);
|
|
err = -ENOMEM;
|
|
goto done;
|
|
}
|
|
|
|
/* Update source addr of the socket */
|
|
bacpy(src, conn->src);
|
|
|
|
err = sco_chan_add(conn, sk, NULL);
|
|
if (err)
|
|
goto done;
|
|
|
|
if (hcon->state == BT_CONNECTED) {
|
|
sco_sock_clear_timer(sk);
|
|
sk->sk_state = BT_CONNECTED;
|
|
} else {
|
|
sk->sk_state = BT_CONNECT;
|
|
sco_sock_set_timer(sk, sk->sk_sndtimeo);
|
|
}
|
|
|
|
done:
|
|
hci_dev_unlock(hdev);
|
|
hci_dev_put(hdev);
|
|
return err;
|
|
}
|
|
|
|
static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
|
|
{
|
|
struct sco_conn *conn = sco_pi(sk)->conn;
|
|
struct sk_buff *skb;
|
|
int err;
|
|
|
|
/* Check outgoing MTU */
|
|
if (len > conn->mtu)
|
|
return -EINVAL;
|
|
|
|
BT_DBG("sk %p len %d", sk, len);
|
|
|
|
skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
|
|
if (!skb)
|
|
return err;
|
|
|
|
if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
|
|
kfree_skb(skb);
|
|
return -EFAULT;
|
|
}
|
|
|
|
hci_send_sco(conn->hcon, skb);
|
|
|
|
return len;
|
|
}
|
|
|
|
static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
|
|
{
|
|
struct sock *sk = sco_chan_get(conn);
|
|
|
|
if (!sk)
|
|
goto drop;
|
|
|
|
BT_DBG("sk %p len %d", sk, skb->len);
|
|
|
|
if (sk->sk_state != BT_CONNECTED)
|
|
goto drop;
|
|
|
|
if (!sock_queue_rcv_skb(sk, skb))
|
|
return;
|
|
|
|
drop:
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
/* -------- Socket interface ---------- */
|
|
static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba)
|
|
{
|
|
struct hlist_node *node;
|
|
struct sock *sk;
|
|
|
|
sk_for_each(sk, node, &sco_sk_list.head) {
|
|
if (sk->sk_state != BT_LISTEN)
|
|
continue;
|
|
|
|
if (!bacmp(&bt_sk(sk)->src, ba))
|
|
return sk;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Find socket listening on source bdaddr.
|
|
* Returns closest match.
|
|
*/
|
|
static struct sock *sco_get_sock_listen(bdaddr_t *src)
|
|
{
|
|
struct sock *sk = NULL, *sk1 = NULL;
|
|
struct hlist_node *node;
|
|
|
|
read_lock(&sco_sk_list.lock);
|
|
|
|
sk_for_each(sk, node, &sco_sk_list.head) {
|
|
if (sk->sk_state != BT_LISTEN)
|
|
continue;
|
|
|
|
/* Exact match. */
|
|
if (!bacmp(&bt_sk(sk)->src, src))
|
|
break;
|
|
|
|
/* Closest match */
|
|
if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY))
|
|
sk1 = sk;
|
|
}
|
|
|
|
read_unlock(&sco_sk_list.lock);
|
|
|
|
return node ? sk : sk1;
|
|
}
|
|
|
|
static void sco_sock_destruct(struct sock *sk)
|
|
{
|
|
BT_DBG("sk %p", sk);
|
|
|
|
skb_queue_purge(&sk->sk_receive_queue);
|
|
skb_queue_purge(&sk->sk_write_queue);
|
|
}
|
|
|
|
static void sco_sock_cleanup_listen(struct sock *parent)
|
|
{
|
|
struct sock *sk;
|
|
|
|
BT_DBG("parent %p", parent);
|
|
|
|
/* Close not yet accepted channels */
|
|
while ((sk = bt_accept_dequeue(parent, NULL))) {
|
|
sco_sock_close(sk);
|
|
sco_sock_kill(sk);
|
|
}
|
|
|
|
parent->sk_state = BT_CLOSED;
|
|
sock_set_flag(parent, SOCK_ZAPPED);
|
|
}
|
|
|
|
/* Kill socket (only if zapped and orphan)
|
|
* Must be called on unlocked socket.
|
|
*/
|
|
static void sco_sock_kill(struct sock *sk)
|
|
{
|
|
if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
|
|
return;
|
|
|
|
BT_DBG("sk %p state %d", sk, sk->sk_state);
|
|
|
|
/* Kill poor orphan */
|
|
bt_sock_unlink(&sco_sk_list, sk);
|
|
sock_set_flag(sk, SOCK_DEAD);
|
|
sock_put(sk);
|
|
}
|
|
|
|
static void __sco_sock_close(struct sock *sk)
|
|
{
|
|
BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
|
|
|
|
switch (sk->sk_state) {
|
|
case BT_LISTEN:
|
|
sco_sock_cleanup_listen(sk);
|
|
break;
|
|
|
|
case BT_CONNECTED:
|
|
case BT_CONFIG:
|
|
if (sco_pi(sk)->conn) {
|
|
sk->sk_state = BT_DISCONN;
|
|
sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT);
|
|
hci_conn_put(sco_pi(sk)->conn->hcon);
|
|
sco_pi(sk)->conn->hcon = NULL;
|
|
} else
|
|
sco_chan_del(sk, ECONNRESET);
|
|
break;
|
|
|
|
case BT_CONNECT:
|
|
case BT_DISCONN:
|
|
sco_chan_del(sk, ECONNRESET);
|
|
break;
|
|
|
|
default:
|
|
sock_set_flag(sk, SOCK_ZAPPED);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Must be called on unlocked socket. */
|
|
static void sco_sock_close(struct sock *sk)
|
|
{
|
|
sco_sock_clear_timer(sk);
|
|
lock_sock(sk);
|
|
__sco_sock_close(sk);
|
|
release_sock(sk);
|
|
sco_sock_kill(sk);
|
|
}
|
|
|
|
static void sco_sock_init(struct sock *sk, struct sock *parent)
|
|
{
|
|
BT_DBG("sk %p", sk);
|
|
|
|
if (parent) {
|
|
sk->sk_type = parent->sk_type;
|
|
security_sk_clone(parent, sk);
|
|
}
|
|
}
|
|
|
|
static struct proto sco_proto = {
|
|
.name = "SCO",
|
|
.owner = THIS_MODULE,
|
|
.obj_size = sizeof(struct sco_pinfo)
|
|
};
|
|
|
|
static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio)
|
|
{
|
|
struct sock *sk;
|
|
|
|
sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto);
|
|
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;
|
|
|
|
setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk);
|
|
|
|
bt_sock_link(&sco_sk_list, sk);
|
|
return sk;
|
|
}
|
|
|
|
static int sco_sock_create(struct net *net, struct socket *sock, int protocol,
|
|
int kern)
|
|
{
|
|
struct sock *sk;
|
|
|
|
BT_DBG("sock %p", sock);
|
|
|
|
sock->state = SS_UNCONNECTED;
|
|
|
|
if (sock->type != SOCK_SEQPACKET)
|
|
return -ESOCKTNOSUPPORT;
|
|
|
|
sock->ops = &sco_sock_ops;
|
|
|
|
sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC);
|
|
if (!sk)
|
|
return -ENOMEM;
|
|
|
|
sco_sock_init(sk, NULL);
|
|
return 0;
|
|
}
|
|
|
|
static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
|
|
{
|
|
struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
|
|
struct sock *sk = sock->sk;
|
|
int err = 0;
|
|
|
|
BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr));
|
|
|
|
if (!addr || addr->sa_family != AF_BLUETOOTH)
|
|
return -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
|
|
if (sk->sk_state != BT_OPEN) {
|
|
err = -EBADFD;
|
|
goto done;
|
|
}
|
|
|
|
if (sk->sk_type != SOCK_SEQPACKET) {
|
|
err = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr);
|
|
|
|
sk->sk_state = BT_BOUND;
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
|
|
{
|
|
struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
|
|
struct sock *sk = sock->sk;
|
|
int err = 0;
|
|
|
|
|
|
BT_DBG("sk %p", sk);
|
|
|
|
if (alen < sizeof(struct sockaddr_sco) ||
|
|
addr->sa_family != AF_BLUETOOTH)
|
|
return -EINVAL;
|
|
|
|
if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
|
|
return -EBADFD;
|
|
|
|
if (sk->sk_type != SOCK_SEQPACKET)
|
|
return -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
|
|
/* Set destination address and psm */
|
|
bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr);
|
|
|
|
err = sco_connect(sk);
|
|
if (err)
|
|
goto done;
|
|
|
|
err = bt_sock_wait_state(sk, BT_CONNECTED,
|
|
sock_sndtimeo(sk, flags & O_NONBLOCK));
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int sco_sock_listen(struct socket *sock, int backlog)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
bdaddr_t *src = &bt_sk(sk)->src;
|
|
int err = 0;
|
|
|
|
BT_DBG("sk %p backlog %d", sk, backlog);
|
|
|
|
lock_sock(sk);
|
|
|
|
if (sk->sk_state != BT_BOUND) {
|
|
err = -EBADFD;
|
|
goto done;
|
|
}
|
|
|
|
if (sk->sk_type != SOCK_SEQPACKET) {
|
|
err = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
write_lock(&sco_sk_list.lock);
|
|
|
|
if (__sco_get_sock_listen_by_addr(src)) {
|
|
err = -EADDRINUSE;
|
|
goto unlock;
|
|
}
|
|
|
|
sk->sk_max_ack_backlog = backlog;
|
|
sk->sk_ack_backlog = 0;
|
|
|
|
sk->sk_state = BT_LISTEN;
|
|
|
|
unlock:
|
|
write_unlock(&sco_sk_list.lock);
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags)
|
|
{
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
struct sock *sk = sock->sk, *ch;
|
|
long timeo;
|
|
int err = 0;
|
|
|
|
lock_sock(sk);
|
|
|
|
timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
|
|
|
|
BT_DBG("sk %p timeo %ld", sk, timeo);
|
|
|
|
/* Wait for an incoming connection. (wake-one). */
|
|
add_wait_queue_exclusive(sk_sleep(sk), &wait);
|
|
while (1) {
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
if (sk->sk_state != BT_LISTEN) {
|
|
err = -EBADFD;
|
|
break;
|
|
}
|
|
|
|
ch = bt_accept_dequeue(sk, newsock);
|
|
if (ch)
|
|
break;
|
|
|
|
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_RUNNING);
|
|
remove_wait_queue(sk_sleep(sk), &wait);
|
|
|
|
if (err)
|
|
goto done;
|
|
|
|
newsock->state = SS_CONNECTED;
|
|
|
|
BT_DBG("new socket %p", ch);
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer)
|
|
{
|
|
struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
|
|
struct sock *sk = sock->sk;
|
|
|
|
BT_DBG("sock %p, sk %p", sock, sk);
|
|
|
|
addr->sa_family = AF_BLUETOOTH;
|
|
*len = sizeof(struct sockaddr_sco);
|
|
|
|
if (peer)
|
|
bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst);
|
|
else
|
|
bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
|
|
struct msghdr *msg, size_t len)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
int err;
|
|
|
|
BT_DBG("sock %p, sk %p", sock, sk);
|
|
|
|
err = sock_error(sk);
|
|
if (err)
|
|
return err;
|
|
|
|
if (msg->msg_flags & MSG_OOB)
|
|
return -EOPNOTSUPP;
|
|
|
|
lock_sock(sk);
|
|
|
|
if (sk->sk_state == BT_CONNECTED)
|
|
err = sco_send_frame(sk, msg, len);
|
|
else
|
|
err = -ENOTCONN;
|
|
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
int err = 0;
|
|
|
|
BT_DBG("sk %p", sk);
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (optname) {
|
|
default:
|
|
err = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct sco_options opts;
|
|
struct sco_conninfo cinfo;
|
|
int len, err = 0;
|
|
|
|
BT_DBG("sk %p", sk);
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (optname) {
|
|
case SCO_OPTIONS:
|
|
if (sk->sk_state != BT_CONNECTED) {
|
|
err = -ENOTCONN;
|
|
break;
|
|
}
|
|
|
|
opts.mtu = sco_pi(sk)->conn->mtu;
|
|
|
|
BT_DBG("mtu %d", opts.mtu);
|
|
|
|
len = min_t(unsigned int, len, sizeof(opts));
|
|
if (copy_to_user(optval, (char *)&opts, len))
|
|
err = -EFAULT;
|
|
|
|
break;
|
|
|
|
case SCO_CONNINFO:
|
|
if (sk->sk_state != BT_CONNECTED) {
|
|
err = -ENOTCONN;
|
|
break;
|
|
}
|
|
|
|
memset(&cinfo, 0, sizeof(cinfo));
|
|
cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
|
|
memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);
|
|
|
|
len = min_t(unsigned int, len, sizeof(cinfo));
|
|
if (copy_to_user(optval, (char *)&cinfo, len))
|
|
err = -EFAULT;
|
|
|
|
break;
|
|
|
|
default:
|
|
err = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
int len, err = 0;
|
|
|
|
BT_DBG("sk %p", sk);
|
|
|
|
if (level == SOL_SCO)
|
|
return sco_sock_getsockopt_old(sock, optname, optval, optlen);
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (optname) {
|
|
default:
|
|
err = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int sco_sock_shutdown(struct socket *sock, int how)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
int err = 0;
|
|
|
|
BT_DBG("sock %p, sk %p", sock, sk);
|
|
|
|
if (!sk)
|
|
return 0;
|
|
|
|
lock_sock(sk);
|
|
if (!sk->sk_shutdown) {
|
|
sk->sk_shutdown = SHUTDOWN_MASK;
|
|
sco_sock_clear_timer(sk);
|
|
__sco_sock_close(sk);
|
|
|
|
if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime)
|
|
err = bt_sock_wait_state(sk, BT_CLOSED,
|
|
sk->sk_lingertime);
|
|
}
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int sco_sock_release(struct socket *sock)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
int err = 0;
|
|
|
|
BT_DBG("sock %p, sk %p", sock, sk);
|
|
|
|
if (!sk)
|
|
return 0;
|
|
|
|
sco_sock_close(sk);
|
|
|
|
if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) {
|
|
lock_sock(sk);
|
|
err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
|
|
release_sock(sk);
|
|
}
|
|
|
|
sock_orphan(sk);
|
|
sco_sock_kill(sk);
|
|
return err;
|
|
}
|
|
|
|
static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent)
|
|
{
|
|
BT_DBG("conn %p", conn);
|
|
|
|
sco_pi(sk)->conn = conn;
|
|
conn->sk = sk;
|
|
|
|
if (parent)
|
|
bt_accept_enqueue(parent, sk);
|
|
}
|
|
|
|
/* Delete channel.
|
|
* Must be called on the locked socket. */
|
|
static void sco_chan_del(struct sock *sk, int err)
|
|
{
|
|
struct sco_conn *conn;
|
|
|
|
conn = sco_pi(sk)->conn;
|
|
|
|
BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
|
|
|
|
sk->sk_state = BT_CLOSED;
|
|
sk->sk_err = err;
|
|
sk->sk_state_change(sk);
|
|
|
|
sock_set_flag(sk, SOCK_ZAPPED);
|
|
}
|
|
|
|
static void sco_conn_ready(struct sco_conn *conn)
|
|
{
|
|
struct sock *parent;
|
|
struct sock *sk = conn->sk;
|
|
|
|
BT_DBG("conn %p", conn);
|
|
|
|
sco_conn_lock(conn);
|
|
|
|
if (sk) {
|
|
sco_sock_clear_timer(sk);
|
|
bh_lock_sock(sk);
|
|
sk->sk_state = BT_CONNECTED;
|
|
sk->sk_state_change(sk);
|
|
bh_unlock_sock(sk);
|
|
} else {
|
|
parent = sco_get_sock_listen(conn->src);
|
|
if (!parent)
|
|
goto done;
|
|
|
|
bh_lock_sock(parent);
|
|
|
|
sk = sco_sock_alloc(sock_net(parent), NULL,
|
|
BTPROTO_SCO, GFP_ATOMIC);
|
|
if (!sk) {
|
|
bh_unlock_sock(parent);
|
|
goto done;
|
|
}
|
|
|
|
sco_sock_init(sk, parent);
|
|
|
|
bacpy(&bt_sk(sk)->src, conn->src);
|
|
bacpy(&bt_sk(sk)->dst, conn->dst);
|
|
|
|
hci_conn_hold(conn->hcon);
|
|
__sco_chan_add(conn, sk, parent);
|
|
|
|
sk->sk_state = BT_CONNECTED;
|
|
|
|
/* Wake up parent */
|
|
parent->sk_data_ready(parent, 1);
|
|
|
|
bh_unlock_sock(parent);
|
|
}
|
|
|
|
done:
|
|
sco_conn_unlock(conn);
|
|
}
|
|
|
|
/* ----- SCO interface with lower layer (HCI) ----- */
|
|
int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr)
|
|
{
|
|
struct sock *sk;
|
|
struct hlist_node *node;
|
|
int lm = 0;
|
|
|
|
BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr));
|
|
|
|
/* Find listening sockets */
|
|
read_lock(&sco_sk_list.lock);
|
|
sk_for_each(sk, node, &sco_sk_list.head) {
|
|
if (sk->sk_state != BT_LISTEN)
|
|
continue;
|
|
|
|
if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr) ||
|
|
!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) {
|
|
lm |= HCI_LM_ACCEPT;
|
|
break;
|
|
}
|
|
}
|
|
read_unlock(&sco_sk_list.lock);
|
|
|
|
return lm;
|
|
}
|
|
|
|
int sco_connect_cfm(struct hci_conn *hcon, __u8 status)
|
|
{
|
|
BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status);
|
|
if (!status) {
|
|
struct sco_conn *conn;
|
|
|
|
conn = sco_conn_add(hcon);
|
|
if (conn)
|
|
sco_conn_ready(conn);
|
|
} else
|
|
sco_conn_del(hcon, bt_to_errno(status));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int sco_disconn_cfm(struct hci_conn *hcon, __u8 reason)
|
|
{
|
|
BT_DBG("hcon %p reason %d", hcon, reason);
|
|
|
|
sco_conn_del(hcon, bt_to_errno(reason));
|
|
return 0;
|
|
}
|
|
|
|
int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
|
|
{
|
|
struct sco_conn *conn = hcon->sco_data;
|
|
|
|
if (!conn)
|
|
goto drop;
|
|
|
|
BT_DBG("conn %p len %d", conn, skb->len);
|
|
|
|
if (skb->len) {
|
|
sco_recv_frame(conn, skb);
|
|
return 0;
|
|
}
|
|
|
|
drop:
|
|
kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
|
|
static int sco_debugfs_show(struct seq_file *f, void *p)
|
|
{
|
|
struct sock *sk;
|
|
struct hlist_node *node;
|
|
|
|
read_lock(&sco_sk_list.lock);
|
|
|
|
sk_for_each(sk, node, &sco_sk_list.head) {
|
|
seq_printf(f, "%s %s %d\n", batostr(&bt_sk(sk)->src),
|
|
batostr(&bt_sk(sk)->dst), sk->sk_state);
|
|
}
|
|
|
|
read_unlock(&sco_sk_list.lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sco_debugfs_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, sco_debugfs_show, inode->i_private);
|
|
}
|
|
|
|
static const struct file_operations sco_debugfs_fops = {
|
|
.open = sco_debugfs_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static struct dentry *sco_debugfs;
|
|
|
|
static const struct proto_ops sco_sock_ops = {
|
|
.family = PF_BLUETOOTH,
|
|
.owner = THIS_MODULE,
|
|
.release = sco_sock_release,
|
|
.bind = sco_sock_bind,
|
|
.connect = sco_sock_connect,
|
|
.listen = sco_sock_listen,
|
|
.accept = sco_sock_accept,
|
|
.getname = sco_sock_getname,
|
|
.sendmsg = sco_sock_sendmsg,
|
|
.recvmsg = bt_sock_recvmsg,
|
|
.poll = bt_sock_poll,
|
|
.ioctl = bt_sock_ioctl,
|
|
.mmap = sock_no_mmap,
|
|
.socketpair = sock_no_socketpair,
|
|
.shutdown = sco_sock_shutdown,
|
|
.setsockopt = sco_sock_setsockopt,
|
|
.getsockopt = sco_sock_getsockopt
|
|
};
|
|
|
|
static const struct net_proto_family sco_sock_family_ops = {
|
|
.family = PF_BLUETOOTH,
|
|
.owner = THIS_MODULE,
|
|
.create = sco_sock_create,
|
|
};
|
|
|
|
int __init sco_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = proto_register(&sco_proto, 0);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
|
|
if (err < 0) {
|
|
BT_ERR("SCO socket registration failed");
|
|
goto error;
|
|
}
|
|
|
|
if (bt_debugfs) {
|
|
sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs,
|
|
NULL, &sco_debugfs_fops);
|
|
if (!sco_debugfs)
|
|
BT_ERR("Failed to create SCO debug file");
|
|
}
|
|
|
|
BT_INFO("SCO socket layer initialized");
|
|
|
|
return 0;
|
|
|
|
error:
|
|
proto_unregister(&sco_proto);
|
|
return err;
|
|
}
|
|
|
|
void __exit sco_exit(void)
|
|
{
|
|
debugfs_remove(sco_debugfs);
|
|
|
|
if (bt_sock_unregister(BTPROTO_SCO) < 0)
|
|
BT_ERR("SCO socket unregistration failed");
|
|
|
|
proto_unregister(&sco_proto);
|
|
}
|
|
|
|
module_param(disable_esco, bool, 0644);
|
|
MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation");
|