cregit-Linux how code gets into the kernel

Release 4.11 net/bluetooth/sco.c

Directory: net/bluetooth
/*
   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 <linux/sched/signal.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)
};

/* ---- SCO connections ---- */

struct sco_conn {
	
struct hci_conn	*hcon;

	
spinlock_t	lock;
	
struct sock	*sk;

	
unsigned int    mtu;
};


#define sco_conn_lock(c)	spin_lock(&c->lock);

#define sco_conn_unlock(c)	spin_unlock(&c->lock);

static void sco_sock_close(struct sock *sk);
static void sco_sock_kill(struct sock *sk);

/* ----- SCO socket info ----- */

#define sco_pi(sk) ((struct sco_pinfo *) sk)


struct sco_pinfo {
	
struct bt_sock	bt;
	
bdaddr_t	src;
	
bdaddr_t	dst;
	
__u32		flags;
	
__u16		setting;
	
struct sco_conn	*conn;
};

/* ---- SCO timers ---- */

#define SCO_CONN_TIMEOUT	(HZ * 40)

#define SCO_DISCONN_TIMEOUT	(HZ * 2)


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); }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy6395.45%150.00%
Arnaldo Carvalho de Melo34.55%150.00%
Total66100.00%2100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy3687.80%133.33%
Arnaldo Carvalho de Melo512.20%266.67%
Total41100.00%3100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy2887.50%133.33%
Arnaldo Carvalho de Melo412.50%266.67%
Total32100.00%3100.00%

/* ---- 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_KERNEL); if (!conn) return NULL; spin_lock_init(&conn->lock); hcon->sco_data = conn; conn->hcon = hcon; if (hdev->sco_mtu > 0) conn->mtu = hdev->sco_mtu; else conn->mtu = 60; BT_DBG("hcon %p conn %p", hcon, conn); return conn; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy10491.23%133.33%
Marcel Holtmann97.89%133.33%
Claudio Takahasi10.88%133.33%
Total114100.00%3100.00%

/* 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); if (conn) { sco_conn_lock(conn); conn->sk = NULL; sco_pi(sk)->conn = NULL; sco_conn_unlock(conn); if (conn->hcon) hci_conn_drop(conn->hcon); } sk->sk_state = BT_CLOSED; sk->sk_err = err; sk->sk_state_change(sk); sock_set_flag(sk, SOCK_ZAPPED); }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann109100.00%1100.00%
Total109100.00%1100.00%


static void sco_conn_del(struct hci_conn *hcon, int err) { struct sco_conn *conn = hcon->sco_data; struct sock *sk; if (!conn) return; BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); /* Kill socket */ sco_conn_lock(conn); sk = conn->sk; sco_conn_unlock(conn); if (sk) { sock_hold(sk); bh_lock_sock(sk); sco_sock_clear_timer(sk); sco_chan_del(sk, err); bh_unlock_sock(sk); sco_sock_kill(sk); sock_put(sk); } hcon->sco_data = NULL; kfree(conn); }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy8674.14%120.00%
Kuba Pawlak108.62%120.00%
Marcel Holtmann108.62%120.00%
Andrei Emeltchenko86.90%120.00%
Nicholas Krause21.72%120.00%
Total116100.00%5100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann54100.00%1100.00%
Total54100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Maxim Krasnyansky60100.00%1100.00%
Total60100.00%1100.00%


static int sco_connect(struct sock *sk) { struct sco_conn *conn; struct hci_conn *hcon; struct hci_dev *hdev; int err, type; BT_DBG("%pMR -> %pMR", &sco_pi(sk)->src, &sco_pi(sk)->dst); hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, BDADDR_BREDR); if (!hdev) return -EHOSTUNREACH; hci_dev_lock(hdev); if (lmp_esco_capable(hdev) && !disable_esco) type = ESCO_LINK; else type = SCO_LINK; if (sco_pi(sk)->setting == BT_VOICE_TRANSPARENT && (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev))) { err = -EOPNOTSUPP; goto done; } hcon = hci_connect_sco(hdev, type, &sco_pi(sk)->dst, sco_pi(sk)->setting); if (IS_ERR(hcon)) { err = PTR_ERR(hcon); goto done; } conn = sco_conn_add(hcon); if (!conn) { hci_conn_drop(hcon); err = -ENOMEM; goto done; } /* Update source addr of the socket */ bacpy(&sco_pi(sk)->src, &hcon->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; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy16755.30%16.25%
Marcel Holtmann6120.20%531.25%
Frédéric Dalleau4314.24%318.75%
Ville Tervo175.63%16.25%
Andrei Emeltchenko61.99%212.50%
Arnaldo Carvalho de Melo30.99%16.25%
Gustavo Fernando Padovan20.66%16.25%
Johan Hedberg20.66%16.25%
David Herrmann10.33%16.25%
Total302100.00%16100.00%


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_from_msg(skb_put(skb, len), msg, len)) { kfree_skb(skb); return -EFAULT; } hci_send_sco(conn->hcon, skb); return len; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy10885.71%233.33%
Gustavo Fernando Padovan1310.32%233.33%
Mikel Astiz43.17%116.67%
Al Viro10.79%116.67%
Total126100.00%6100.00%


static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb) { struct sock *sk; sco_conn_lock(conn); sk = conn->sk; sco_conn_unlock(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); }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy7082.35%133.33%
Marcel Holtmann1416.47%133.33%
Arnaldo Carvalho de Melo11.18%133.33%
Total85100.00%3100.00%

/* -------- Socket interface ---------- */
static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba) { struct sock *sk; sk_for_each(sk, &sco_sk_list.head) { if (sk->sk_state != BT_LISTEN) continue; if (!bacmp(&sco_pi(sk)->src, ba)) return sk; } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy3053.57%125.00%
Marcel Holtmann1832.14%250.00%
Arnaldo Carvalho de Melo814.29%125.00%
Total56100.00%4100.00%

/* 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; read_lock(&sco_sk_list.lock); sk_for_each(sk, &sco_sk_list.head) { if (sk->sk_state != BT_LISTEN) continue; /* Exact match. */ if (!bacmp(&sco_pi(sk)->src, src)) break; /* Closest match */ if (!bacmp(&sco_pi(sk)->src, BDADDR_ANY)) sk1 = sk; } read_unlock(&sco_sk_list.lock); return sk ? sk : sk1; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy9188.35%120.00%
Arnaldo Carvalho de Melo98.74%240.00%
Marcel Holtmann21.94%120.00%
Sasha Levin10.97%120.00%
Total103100.00%5100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy3294.12%150.00%
Arnaldo Carvalho de Melo25.88%150.00%
Total34100.00%2100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy5588.71%350.00%
Thomas Graf58.06%116.67%
Arnaldo Carvalho de Melo11.61%116.67%
David Woodhouse11.61%116.67%
Total62100.00%6100.00%

/* 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); }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy4679.31%233.33%
Arnaldo Carvalho de Melo58.62%233.33%
Thomas Graf58.62%116.67%
James Morris23.45%116.67%
Total58100.00%6100.00%


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->hcon) { sk->sk_state = BT_DISCONN; sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); sco_conn_lock(sco_pi(sk)->conn); hci_conn_drop(sco_pi(sk)->conn->hcon); sco_pi(sk)->conn->hcon = NULL; sco_conn_unlock(sco_pi(sk)->conn); } else sco_chan_del(sk, ECONNRESET); break; case BT_CONNECT2: case BT_CONNECT: case BT_DISCONN: sco_chan_del(sk, ECONNRESET); break; default: sock_set_flag(sk, SOCK_ZAPPED); break; } }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy6139.87%111.11%
Luiz Augusto von Dentz5535.95%111.11%
Kuba Pawlak2013.07%111.11%
Thomas Graf53.27%111.11%
Marcel Holtmann31.96%111.11%
Vinicius Costa Gomes31.96%111.11%
Arnaldo Carvalho de Melo31.96%111.11%
Gustavo Fernando Padovan21.31%111.11%
David Herrmann10.65%111.11%
Total153100.00%9100.00%

/* 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); }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann2569.44%150.00%
Maksim Krasnyanskiy1130.56%150.00%
Total36100.00%2100.00%


static void sco_sock_init(struct sock *sk, struct sock *parent) { BT_DBG("sk %p", sk); if (parent) { sk->sk_type = parent->sk_type; bt_sk(sk)->flags = bt_sk(parent)->flags; security_sk_clone(parent, sk); } }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy3356.90%125.00%
Frédéric Dalleau1424.14%125.00%
Paul Moore915.52%125.00%
Arnaldo Carvalho de Melo23.45%125.00%
Total58100.00%4100.00%

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, int kern) { struct sock *sk; sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto, 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; setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk); bt_sock_link(&sco_sk_list, sk); return sk; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy6848.23%220.00%
Marcel Holtmann3424.11%110.00%
Pavel Emelyanov128.51%110.00%
Eric W. Biedermann128.51%220.00%
Frédéric Dalleau96.38%110.00%
Arnaldo Carvalho de Melo53.55%220.00%
Al Viro10.71%110.00%
Total141100.00%10100.00%


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, kern); if (!sk) return -ENOMEM; sco_sock_init(sk, NULL); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy7580.65%120.00%
Eric W. Biedermann99.68%240.00%
Marcel Holtmann66.45%120.00%
Eric Paris33.23%120.00%
Total93100.00%5100.00%


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 %pMR", sk, &sa->sco_bdaddr); if (!addr || addr->sa_family != AF_BLUETOOTH) return -EINVAL; if (addr_len < sizeof(struct sockaddr_sco)) 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(&sco_pi(sk)->src, &sa->sco_bdaddr); sk->sk_state = BT_BOUND; done: release_sock(sk); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy13283.02%116.67%
David S. Miller148.81%116.67%
Marcel Holtmann106.29%233.33%
Arnaldo Carvalho de Melo21.26%116.67%
Andrei Emeltchenko10.63%116.67%
Total159100.00%6100.00%


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; 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(&sco_pi(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; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy15391.62%233.33%
Changli Gao63.59%116.67%
Andrei Emeltchenko42.40%116.67%
Arnaldo Carvalho de Melo31.80%116.67%
Marcel Holtmann10.60%116.67%
Total167100.00%6100.00%


static int sco_sock_listen(struct socket *sock, int backlog) { struct sock *sk = sock->sk; bdaddr_t *src = &sco_pi(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; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy8555.56%116.67%
Marcel Holtmann6441.83%466.67%
Arnaldo Carvalho de Melo42.61%116.67%
Total153100.00%6100.00%


static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags, bool kern) { DEFINE_WAIT_FUNC(wait, woken_wake_function); 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) { 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 = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo); lock_sock(sk); } 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; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy16074.42%114.29%
Peter Hurley4320.00%228.57%
Eric Dumazet62.79%114.29%
David Howells31.40%114.29%
Arnaldo Carvalho de Melo20.93%114.29%
Marcel Holtmann10.47%114.29%
Total215100.00%7100.00%


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, &sco_pi(sk)->dst); else bacpy(&sa->sco_bdaddr, &sco_pi(sk)->src); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy10698.15%150.00%
Marcel Holtmann21.85%150.00%
Total108100.00%2100.00%


static int sco_sock_sendmsg(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; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy9389.42%125.00%
Benjamin LaHaise98.65%125.00%
Arnaldo Carvalho de Melo10.96%125.00%
Stephen Hemminger10.96%125.00%
Total104100.00%4100.00%


static void sco_conn_defer_accept(struct hci_conn *conn, u16 setting) { struct hci_dev *hdev = conn->hdev; BT_DBG("conn %p", conn); conn->state = BT_CONFIG; if (!lmp_esco_capable(hdev)) { struct hci_cp_accept_conn_req cp; bacpy(&cp.bdaddr, &conn->dst); cp.role = 0x00; /* Ignored */ hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp); } else { struct hci_cp_accept_sync_conn_req cp; bacpy(&cp.bdaddr, &conn->dst); cp.pkt_type = cpu_to_le16(conn->pkt_type); cp.tx_bandwidth = cpu_to_le32(0x00001f40); cp.rx_bandwidth = cpu_to_le32(0x00001f40); cp.content_format = cpu_to_le16(setting); switch (setting & SCO_AIRMODE_MASK) { case SCO_AIRMODE_TRANSP: if (conn->pkt_type & ESCO_2EV3) cp.max_latency = cpu_to_le16(0x0008); else cp.max_latency = cpu_to_le16(0x000D); cp.retrans_effort = 0x02; break; case SCO_AIRMODE_CVSD: cp.max_latency = cpu_to_le16(0xffff); cp.retrans_effort = 0xff; break; } hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp), &cp); } }

Contributors

PersonTokensPropCommitsCommitProp
Frédéric Dalleau21797.75%375.00%
Joe Perches52.25%125.00%
Total222100.00%4100.00%


static int sco_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, int flags) { struct sock *sk = sock->sk; struct sco_pinfo *pi = sco_pi(sk); lock_sock(sk); if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { sco_conn_defer_accept(pi->conn->hcon, pi->setting); sk->sk_state = BT_CONFIG; release_sock(sk); return 0; } release_sock(sk); return bt_sock_recvmsg(sock, msg, len, flags); }

Contributors

PersonTokensPropCommitsCommitProp
Frédéric Dalleau113100.00%3100.00%
Total113100.00%3100.00%


static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) { struct sock *sk = sock->sk; int len, err = 0; struct bt_voice voice; u32 opt; BT_DBG("sk %p", sk); lock_sock(sk); switch (optname) { case BT_DEFER_SETUP: if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { err = -EINVAL; break; } if (get_user(opt, (u32 __user *) optval)) { err = -EFAULT; break; } if (opt) set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); else clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); break; case BT_VOICE: if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECT2) { err = -EINVAL; break; } voice.setting = sco_pi(sk)->setting; len = min_t(unsigned int, sizeof(voice), optlen); if (copy_from_user((char *)&voice, optval, len)) { err = -EFAULT; break; } /* Explicitly check for these values */ if (voice.setting != BT_VOICE_TRANSPARENT && voice.setting != BT_VOICE_CVSD_16BIT) { err = -EINVAL; break; } sco_pi(sk)->setting = voice.setting; break; default: err = -ENOPROTOOPT; break; } release_sock(sk); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Frédéric Dalleau20073.26%233.33%
Maksim Krasnyanskiy7025.64%116.67%
Al Viro10.37%116.67%
Marcel Holtmann10.37%116.67%
David S. Miller10.37%116.67%
Total273100.00%6100.00%


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 && !(sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { 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 && !(sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { 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; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy22873.08%220.00%
Johan Hedberg4414.10%110.00%
Marcel Holtmann237.37%440.00%
Vasiliy Kulikov134.17%110.00%
Arnaldo Carvalho de Melo20.64%110.00%
Al Viro20.64%110.00%
Total312100.00%10100.00%


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; struct bt_voice voice; 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) { case BT_DEFER_SETUP: if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { err = -EINVAL; break; } if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), (u32 __user *)optval)) err = -EFAULT; break; case BT_VOICE: voice.setting = sco_pi(sk)->setting; len = min_t(unsigned int, len, sizeof(voice)); if (copy_to_user(optval, (char *)&voice, len)) err = -EFAULT; break; default: err = -ENOPROTOOPT; break; } release_sock(sk); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Frédéric Dalleau10750.00%266.67%
Marcel Holtmann10750.00%133.33%
Total214100.00%3100.00%


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; sock_hold(sk); 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 && !(current->flags & PF_EXITING)) err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); } release_sock(sk); sock_put(sk); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann10985.16%133.33%
Kuba Pawlak107.81%133.33%
Vladimir Davydov97.03%133.33%
Total128100.00%3100.00%


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 && !(current->flags & PF_EXITING)) { 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; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy9891.59%266.67%
Vladimir Davydov98.41%133.33%
Total107100.00%3100.00%


static void sco_conn_ready(struct sco_conn *conn) { struct sock *parent; struct sock *sk = conn->sk; BT_DBG("conn %p", 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 { sco_conn_lock(conn); if (!conn->hcon) { sco_conn_unlock(conn); return; } parent = sco_get_sock_listen(&conn->hcon->src); if (!parent) { sco_conn_unlock(conn); return; } bh_lock_sock(parent); sk = sco_sock_alloc(sock_net(parent), NULL, BTPROTO_SCO, GFP_ATOMIC, 0); if (!sk) { bh_unlock_sock(parent); sco_conn_unlock(conn); return; } sco_sock_init(sk, parent); bacpy(&sco_pi(sk)->src, &conn->hcon->src); bacpy(&sco_pi(sk)->dst, &conn->hcon->dst); hci_conn_hold(conn->hcon); __sco_chan_add(conn, sk, parent); if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) sk->sk_state = BT_CONNECT2; else sk->sk_state = BT_CONNECTED; /* Wake up parent */ parent->sk_data_ready(parent); bh_unlock_sock(parent); sco_conn_unlock(conn); } }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy17466.92%19.09%
Frédéric Dalleau228.46%19.09%
Andre Guedes207.69%19.09%
Kuba Pawlak155.77%19.09%
Marcel Holtmann114.23%218.18%
Andrei Emeltchenko72.69%19.09%
Eric W. Biedermann41.54%218.18%
Arnaldo Carvalho de Melo41.54%19.09%
Hideaki Yoshifuji / 吉藤英明31.15%19.09%
Total260100.00%11100.00%

/* ----- SCO interface with lower layer (HCI) ----- */
int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags) { struct sock *sk; int lm = 0; BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr); /* Find listening sockets */ read_lock(&sco_sk_list.lock); sk_for_each(sk, &sco_sk_list.head) { if (sk->sk_state != BT_LISTEN) continue; if (!bacmp(&sco_pi(sk)->src, &hdev->bdaddr) || !bacmp(&sco_pi(sk)->src, BDADDR_ANY)) { lm |= HCI_LM_ACCEPT; if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) *flags |= HCI_PROTO_DEFER; break; } } read_unlock(&sco_sk_list.lock); return lm; }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann8562.50%240.00%
Maksim Krasnyanskiy2619.12%120.00%
Frédéric Dalleau2417.65%120.00%
Andrei Emeltchenko10.74%120.00%
Total136100.00%5100.00%


static void sco_connect_cfm(struct hci_conn *hcon, __u8 status) { if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) return; BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &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)); }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy6376.83%120.00%
Johan Hedberg1619.51%120.00%
Andrei Emeltchenko22.44%240.00%
Joe Perches11.22%120.00%
Total82100.00%5100.00%


static void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason) { if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) return; BT_DBG("hcon %p reason %d", hcon, reason); sco_conn_del(hcon, bt_to_errno(reason)); }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy2960.42%120.00%
Johan Hedberg1633.33%120.00%
Andrei Emeltchenko12.08%120.00%
Marcel Holtmann12.08%120.00%
Joe Perches12.08%120.00%
Total48100.00%5100.00%


void 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; } drop: kfree_skb(skb); }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy6496.97%150.00%
Arron Wang23.03%150.00%
Total66100.00%2100.00%

static struct hci_cb sco_cb = { .name = "SCO", .connect_cfm = sco_connect_cfm, .disconn_cfm = sco_disconn_cfm, };
static int sco_debugfs_show(struct seq_file *f, void *p) { struct sock *sk; read_lock(&sco_sk_list.lock); sk_for_each(sk, &sco_sk_list.head) { seq_printf(f, "%pMR %pMR %d\n", &sco_pi(sk)->src, &sco_pi(sk)->dst, sk->sk_state); } read_unlock(&sco_sk_list.lock); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy4864.86%218.18%
Marcel Holtmann1418.92%436.36%
Arnaldo Carvalho de Melo79.46%218.18%
Gustavo Fernando Padovan22.70%19.09%
Andi Kleen22.70%19.09%
Andrei Emeltchenko11.35%19.09%
Total74100.00%11100.00%


static int sco_debugfs_open(struct inode *inode, struct file *file) { return single_open(file, sco_debugfs_show, inode->i_private); }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann2485.71%266.67%
Maksim Krasnyanskiy414.29%133.33%
Total28100.00%3100.00%

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 = sco_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; BUILD_BUG_ON(sizeof(struct sockaddr_sco) > sizeof(struct sockaddr)); 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; } err = bt_procfs_init(&init_net, "sco", &sco_sk_list, NULL); if (err < 0) { BT_ERR("Failed to create SCO proc file"); bt_sock_unregister(BTPROTO_SCO); goto error; } BT_INFO("SCO socket layer initialized"); hci_register_cb(&sco_cb); if (IS_ERR_OR_NULL(bt_debugfs)) return 0; sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs, NULL, &sco_debugfs_fops); return 0; error: proto_unregister(&sco_proto); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann4629.11%545.45%
Arnaldo Carvalho de Melo3723.42%19.09%
Masatake YAMATO3622.78%19.09%
Maksim Krasnyanskiy3320.89%327.27%
Johan Hedberg63.80%19.09%
Total158100.00%11100.00%


void sco_exit(void) { bt_procfs_cleanup(&init_net, "sco"); debugfs_remove(sco_debugfs); hci_unregister_cb(&sco_cb); bt_sock_unregister(BTPROTO_SCO); proto_unregister(&sco_proto); }

Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy1437.84%225.00%
Masatake YAMATO821.62%112.50%
Johan Hedberg616.22%112.50%
Marcel Holtmann513.51%337.50%
Arnaldo Carvalho de Melo410.81%112.50%
Total37100.00%8100.00%

module_param(disable_esco, bool, 0644); MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation");

Overall Contributors

PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy284952.45%65.22%
Marcel Holtmann99618.34%3126.96%
Frédéric Dalleau75013.81%97.83%
Arnaldo Carvalho de Melo1522.80%76.09%
Johan Hedberg1122.06%43.48%
Maxim Krasnyansky711.31%10.87%
Kuba Pawlak551.01%43.48%
Luiz Augusto von Dentz551.01%10.87%
Masatake YAMATO440.81%10.87%
Peter Hurley430.79%21.74%
Rusty Russell370.68%21.74%
Andrei Emeltchenko310.57%43.48%
Eric W. Biedermann250.46%21.74%
Andre Guedes200.37%10.87%
Gustavo Fernando Padovan190.35%54.35%
Vladimir Davydov180.33%10.87%
Ville Tervo170.31%10.87%
Thomas Graf150.28%10.87%
David S. Miller150.28%21.74%
Vasiliy Kulikov130.24%10.87%
Pavel Emelyanov120.22%10.87%
Paul Moore90.17%10.87%
Benjamin LaHaise90.17%10.87%
Eric Dumazet80.15%21.74%
Joe Perches70.13%21.74%
Changli Gao60.11%10.87%
Al Viro50.09%32.61%
Mikel Astiz40.07%10.87%
Hideaki Yoshifuji / 吉藤英明40.07%21.74%
Robert P. J. Day40.07%10.87%
David Howells30.06%10.87%
Ingo Molnar30.06%10.87%
Eric Paris30.06%10.87%
Vinicius Costa Gomes30.06%10.87%
Stephen Hemminger20.04%21.74%
Nicholas Krause20.04%10.87%
James Morris20.04%10.87%
Andi Kleen20.04%10.87%
Arron Wang20.04%10.87%
David Herrmann20.04%10.87%
Sasha Levin10.02%10.87%
Claudio Takahasi10.02%10.87%
David Woodhouse10.02%10.87%
Total5432100.00%115100.00%
Directory: net/bluetooth
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