cregit-Linux how code gets into the kernel

Release 4.8 net/netrom/af_netrom.c

Directory: net/netrom
/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Copyright Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
 * Copyright Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
 * Copyright Darryl Miles G7LED (dlm@g7led.demon.co.uk)
 */
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/stat.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/termios.h>	/* For TIOCINQ/OUTQ */
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <net/netrom.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <net/ip.h>
#include <net/tcp_states.h>
#include <net/arp.h>
#include <linux/init.h>


static int nr_ndevs = 4;


int sysctl_netrom_default_path_quality            = NR_DEFAULT_QUAL;

int sysctl_netrom_obsolescence_count_initialiser  = NR_DEFAULT_OBS;

int sysctl_netrom_network_ttl_initialiser         = NR_DEFAULT_TTL;

int sysctl_netrom_transport_timeout               = NR_DEFAULT_T1;

int sysctl_netrom_transport_maximum_tries         = NR_DEFAULT_N2;

int sysctl_netrom_transport_acknowledge_delay     = NR_DEFAULT_T2;

int sysctl_netrom_transport_busy_delay            = NR_DEFAULT_T4;

int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW;

int sysctl_netrom_transport_no_activity_timeout   = NR_DEFAULT_IDLE;

int sysctl_netrom_routing_control                 = NR_DEFAULT_ROUTING;

int sysctl_netrom_link_fails_count                = NR_DEFAULT_FAILS;

int sysctl_netrom_reset_circuit                   = NR_DEFAULT_RESET;


static unsigned short circuit = 0x101;

static HLIST_HEAD(nr_list);
static DEFINE_SPINLOCK(nr_list_lock);


static const struct proto_ops nr_proto_ops;

/*
 * NETROM network devices are virtual network devices encapsulating NETROM
 * frames into AX.25 which will be sent through an AX.25 device, so form a
 * special "super class" of normal net devices; split their locks off into a
 * separate class since they always nest.
 */

static struct lock_class_key nr_netdev_xmit_lock_key;

static struct lock_class_key nr_netdev_addr_lock_key;


static void nr_set_lockdep_one(struct net_device *dev, struct netdev_queue *txq, void *_unused) { lockdep_set_class(&txq->_xmit_lock, &nr_netdev_xmit_lock_key); }

Contributors

PersonTokensPropCommitsCommitProp
david s. millerdavid s. miller31100.00%2100.00%
Total31100.00%2100.00%


static void nr_set_lockdep_key(struct net_device *dev) { lockdep_set_class(&dev->addr_list_lock, &nr_netdev_addr_lock_key); netdev_for_each_tx_queue(dev, nr_set_lockdep_one, NULL); }

Contributors

PersonTokensPropCommitsCommitProp
david s. millerdavid s. miller31100.00%3100.00%
Total31100.00%3100.00%

/* * Socket removal during an interrupt is now safe. */
static void nr_remove_socket(struct sock *sk) { spin_lock_bh(&nr_list_lock); sk_del_node_init(sk); spin_unlock_bh(&nr_list_lock); }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git2175.00%240.00%
ralf baechleralf baechle621.43%240.00%
arnaldo carvalho de meloarnaldo carvalho de melo13.57%120.00%
Total28100.00%5100.00%

/* * Kill all bound sockets on a dropped device. */
static void nr_kill_by_device(struct net_device *dev) { struct sock *s; spin_lock_bh(&nr_list_lock); sk_for_each(s, &nr_list) if (nr_sk(s)->device == dev) nr_disconnect(s, ENETUNREACH); spin_unlock_bh(&nr_list_lock); }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git3159.62%342.86%
ralf baechleralf baechle1223.08%228.57%
arnaldo carvalho de meloarnaldo carvalho de melo611.54%114.29%
david s. millerdavid s. miller35.77%114.29%
Total52100.00%7100.00%

/* * Handle device status changes. */
static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr) { struct net_device *dev = netdev_notifier_info_to_dev(ptr); if (!net_eq(dev_net(dev), &init_net)) return NOTIFY_DONE; if (event != NETDEV_DOWN) return NOTIFY_DONE; nr_kill_by_device(dev); nr_rt_device_down(dev); return NOTIFY_DONE; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git4870.59%660.00%
eric w. biedermaneric w. biederman913.24%110.00%
hideaki yoshifujihideaki yoshifuji811.76%220.00%
jiri pirkojiri pirko34.41%110.00%
Total68100.00%10100.00%

/* * Add a socket to the bound sockets list. */
static void nr_insert_socket(struct sock *sk) { spin_lock_bh(&nr_list_lock); sk_add_node(sk, &nr_list); spin_unlock_bh(&nr_list_lock); }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git2064.52%240.00%
ralf baechleralf baechle619.35%240.00%
arnaldo carvalho de meloarnaldo carvalho de melo516.13%120.00%
Total31100.00%5100.00%

/* * Find a socket that wants to accept the Connect Request we just * received. */
static struct sock *nr_find_listener(ax25_address *addr) { struct sock *s; spin_lock_bh(&nr_list_lock); sk_for_each(s, &nr_list) if (!ax25cmp(&nr_sk(s)->source_addr, addr) && s->sk_state == TCP_LISTEN) { bh_lock_sock(s); goto found; } s = NULL; found: spin_unlock_bh(&nr_list_lock); return s; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git4356.58%225.00%
arnaldo carvalho de meloarnaldo carvalho de melo1621.05%225.00%
jeroen vreekenjeroen vreeken79.21%112.50%
ralf baechleralf baechle67.89%225.00%
david s. millerdavid s. miller45.26%112.50%
Total76100.00%8100.00%

/* * Find a connected NET/ROM socket given my circuit IDs. */
static struct sock *nr_find_socket(unsigned char index, unsigned char id) { struct sock *s; spin_lock_bh(&nr_list_lock); sk_for_each(s, &nr_list) { struct nr_sock *nr = nr_sk(s); if (nr->my_index == index && nr->my_id == id) { bh_lock_sock(s); goto found; } } s = NULL; found: spin_unlock_bh(&nr_list_lock); return s; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git4553.57%333.33%
arnaldo carvalho de meloarnaldo carvalho de melo1619.05%111.11%
david s. millerdavid s. miller89.52%111.11%
ralf baechleralf baechle89.52%333.33%
jeroen vreekenjeroen vreeken78.33%111.11%
Total84100.00%9100.00%

/* * Find a connected NET/ROM socket given their circuit IDs. */
static struct sock *nr_find_peer(unsigned char index, unsigned char id, ax25_address *dest) { struct sock *s; spin_lock_bh(&nr_list_lock); sk_for_each(s, &nr_list) { struct nr_sock *nr = nr_sk(s); if (nr->your_index == index && nr->your_id == id && !ax25cmp(&nr->dest_addr, dest)) { bh_lock_sock(s); goto found; } } s = NULL; found: spin_unlock_bh(&nr_list_lock); return s; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git5959.60%333.33%
arnaldo carvalho de meloarnaldo carvalho de melo1616.16%111.11%
david s. millerdavid s. miller99.09%111.11%
ralf baechleralf baechle88.08%333.33%
jeroen vreekenjeroen vreeken77.07%111.11%
Total99100.00%9100.00%

/* * Find next free circuit ID. */
static unsigned short nr_find_next_circuit(void) { unsigned short id = circuit; unsigned char i, j; struct sock *sk; for (;;) { i = id / 256; j = id % 256; if (i != 0 && j != 0) { if ((sk=nr_find_socket(i, j)) == NULL) break; bh_unlock_sock(sk); } id++; } return id; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git6880.95%150.00%
jeroen vreekenjeroen vreeken1619.05%150.00%
Total84100.00%2100.00%

/* * Deferred destroy. */ void nr_destroy_socket(struct sock *); /* * Handler for deferred kills. */
static void nr_destroy_timer(unsigned long data) { struct sock *sk=(struct sock *)data; bh_lock_sock(sk); sock_hold(sk); nr_destroy_socket(sk); bh_unlock_sock(sk); sock_put(sk); }

Contributors

PersonTokensPropCommitsCommitProp
jeroen vreekenjeroen vreeken2961.70%133.33%
pre-gitpre-git1838.30%266.67%
Total47100.00%3100.00%

/* * This is called from user mode and the timers. Thus it protects itself * against interrupt users but doesn't worry about being called during * work. Once it is removed from the queue no interrupt or bottom half * will touch it and we are (fairly 8-) ) safe. */
void nr_destroy_socket(struct sock *sk) { struct sk_buff *skb; nr_remove_socket(sk); nr_stop_heartbeat(sk); nr_stop_t1timer(sk); nr_stop_t2timer(sk); nr_stop_t4timer(sk); nr_stop_idletimer(sk); nr_clear_queues(sk); /* Flush the queues */ while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { if (skb->sk != sk) { /* A pending connection */ /* Queue the unaccepted socket for death */ sock_set_flag(skb->sk, SOCK_DEAD); nr_start_heartbeat(skb->sk); nr_sk(skb->sk)->state = NR_STATE_0; } kfree_skb(skb); } if (sk_has_allocations(sk)) { /* Defer: outstanding buffers */ sk->sk_timer.function = nr_destroy_timer; sk->sk_timer.expires = jiffies + 2 * HZ; add_timer(&sk->sk_timer); } else sock_put(sk); }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git13585.99%640.00%
arnaldo carvalho de meloarnaldo carvalho de melo85.10%213.33%
vinay k nallamothuvinay k nallamothu42.55%16.67%
david s. millerdavid s. miller31.91%16.67%
jeroen vreekenjeroen vreeken21.27%213.33%
ralf baechleralf baechle21.27%16.67%
james morrisjames morris21.27%16.67%
eric dumazeteric dumazet10.64%16.67%
Total157100.00%15100.00%

/* * Handling for system calls applied via the various interfaces to a * NET/ROM socket object. */
static int nr_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) { struct sock *sk = sock->sk; struct nr_sock *nr = nr_sk(sk); unsigned long opt; if (level != SOL_NETROM) return -ENOPROTOOPT; if (optlen < sizeof(unsigned int)) return -EINVAL; if (get_user(opt, (unsigned int __user *)optval)) return -EFAULT; switch (optname) { case NETROM_T1: if (opt < 1 || opt > ULONG_MAX / HZ) return -EINVAL; nr->t1 = opt * HZ; return 0; case NETROM_T2: if (opt < 1 || opt > ULONG_MAX / HZ) return -EINVAL; nr->t2 = opt * HZ; return 0; case NETROM_N2: if (opt < 1 || opt > 31) return -EINVAL; nr->n2 = opt; return 0; case NETROM_T4: if (opt < 1 || opt > ULONG_MAX / HZ) return -EINVAL; nr->t4 = opt * HZ; return 0; case NETROM_IDLE: if (opt > ULONG_MAX / (60 * HZ)) return -EINVAL; nr->idle = opt * 60 * HZ; return 0; default: return -ENOPROTOOPT; } }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git20581.67%758.33%
xi wangxi wang3313.15%18.33%
david s. millerdavid s. miller93.59%216.67%
ralf baechleralf baechle20.80%18.33%
al viroal viro20.80%18.33%
Total251100.00%12100.00%


static int nr_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) { struct sock *sk = sock->sk; struct nr_sock *nr = nr_sk(sk); int val = 0; int len; if (level != SOL_NETROM) return -ENOPROTOOPT; if (get_user(len, optlen)) return -EFAULT; if (len < 0) return -EINVAL; switch (optname) { case NETROM_T1: val = nr->t1 / HZ; break; case NETROM_T2: val = nr->t2 / HZ; break; case NETROM_N2: val = nr->n2; break; case NETROM_T4: val = nr->t4 / HZ; break; case NETROM_IDLE: val = nr->idle / (60 * HZ); break; default: return -ENOPROTOOPT; } len = min_t(unsigned int, len, sizeof(int)); if (put_user(len, optlen)) return -EFAULT; return copy_to_user(optval, &val, len) ? -EFAULT : 0; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git17386.50%960.00%
linus torvaldslinus torvalds157.50%320.00%
david s. millerdavid s. miller84.00%16.67%
ralf baechleralf baechle21.00%16.67%
al viroal viro21.00%16.67%
Total200100.00%15100.00%


static int nr_listen(struct socket *sock, int backlog) { struct sock *sk = sock->sk; lock_sock(sk); if (sk->sk_state != TCP_LISTEN) { memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN); sk->sk_max_ack_backlog = backlog; sk->sk_state = TCP_LISTEN; release_sock(sk); return 0; } release_sock(sk); return -EOPNOTSUPP; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git6073.17%457.14%
jeroen vreekenjeroen vreeken1518.29%114.29%
david s. millerdavid s. miller44.88%114.29%
arnaldo carvalho de meloarnaldo carvalho de melo33.66%114.29%
Total82100.00%7100.00%

static struct proto nr_proto = { .name = "NETROM", .owner = THIS_MODULE, .obj_size = sizeof(struct nr_sock), };
static int nr_create(struct net *net, struct socket *sock, int protocol, int kern) { struct sock *sk; struct nr_sock *nr; if (!net_eq(net, &init_net)) return -EAFNOSUPPORT; if (sock->type != SOCK_SEQPACKET || protocol != 0) return -ESOCKTNOSUPPORT; sk = sk_alloc(net, PF_NETROM, GFP_ATOMIC, &nr_proto, kern); if (sk == NULL) return -ENOMEM; nr = nr_sk(sk); sock_init_data(sock, sk); sock->ops = &nr_proto_ops; sk->sk_protocol = protocol; skb_queue_head_init(&nr->ack_queue); skb_queue_head_init(&nr->reseq_queue); skb_queue_head_init(&nr->frag_queue); nr_init_timers(sk); nr->t1 = msecs_to_jiffies(sysctl_netrom_transport_timeout); nr->t2 = msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay); nr->n2 = msecs_to_jiffies(sysctl_netrom_transport_maximum_tries); nr->t4 = msecs_to_jiffies(sysctl_netrom_transport_busy_delay); nr->idle = msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout); nr->window = sysctl_netrom_transport_requested_window_size; nr->bpqext = 1; nr->state = NR_STATE_0; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git14870.14%1150.00%
eric w. biedermaneric w. biederman199.00%29.09%
ralf baechleralf baechle178.06%29.09%
arnaldo carvalho de meloarnaldo carvalho de melo104.74%29.09%
octavian purdilaoctavian purdila52.37%14.55%
pavel emelianovpavel emelianov41.90%14.55%
eric pariseric paris31.42%14.55%
david s. millerdavid s. miller31.42%14.55%
vinay k nallamothuvinay k nallamothu20.95%14.55%
Total211100.00%22100.00%


static struct sock *nr_make_new(struct sock *osk) { struct sock *sk; struct nr_sock *nr, *onr; if (osk->sk_type != SOCK_SEQPACKET) return NULL; sk = sk_alloc(sock_net(osk), PF_NETROM, GFP_ATOMIC, osk->sk_prot, 0); if (sk == NULL) return NULL; nr = nr_sk(sk); sock_init_data(NULL, sk); sk->sk_type = osk->sk_type; sk->sk_priority = osk->sk_priority; sk->sk_protocol = osk->sk_protocol; sk->sk_rcvbuf = osk->sk_rcvbuf; sk->sk_sndbuf = osk->sk_sndbuf; sk->sk_state = TCP_ESTABLISHED; sock_copy_flags(sk, osk); skb_queue_head_init(&nr->ack_queue); skb_queue_head_init(&nr->reseq_queue); skb_queue_head_init(&nr->frag_queue); nr_init_timers(sk); onr = nr_sk(osk); nr->t1 = onr->t1; nr->t2 = onr->t2; nr->n2 = onr->n2; nr->t4 = onr->t4; nr->idle = onr->idle; nr->window = onr->window; nr->device = onr->device; nr->bpqext = onr->bpqext; return sk; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git17172.46%1045.45%
arnaldo carvalho de meloarnaldo carvalho de melo229.32%29.09%
david s. millerdavid s. miller218.90%14.55%
thomas grafthomas graf62.54%29.09%
pavel emelianovpavel emelianov41.69%14.55%
eric w. biedermaneric w. biederman41.69%29.09%
hideaki yoshifujihideaki yoshifuji31.27%14.55%
ralf baechleralf baechle31.27%29.09%
vinay k nallamothuvinay k nallamothu20.85%14.55%
Total236100.00%22100.00%


static int nr_release(struct socket *sock) { struct sock *sk = sock->sk; struct nr_sock *nr; if (sk == NULL) return 0; sock_hold(sk); sock_orphan(sk); lock_sock(sk); nr = nr_sk(sk); switch (nr->state) { case NR_STATE_0: case NR_STATE_1: case NR_STATE_2: nr_disconnect(sk, 0); nr_destroy_socket(sk); break; case NR_STATE_3: nr_clear_queues(sk); nr->n2count = 0; nr_write_internal(sk, NR_DISCREQ); nr_start_t1timer(sk); nr_stop_t2timer(sk); nr_stop_t4timer(sk); nr_stop_idletimer(sk); nr->state = NR_STATE_2; sk->sk_state = TCP_CLOSE; sk->sk_shutdown |= SEND_SHUTDOWN; sk->sk_state_change(sk); sock_set_flag(sk, SOCK_DESTROY); break; default: break; } sock->sk = NULL; release_sock(sk); sock_put(sk); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git13675.14%1055.56%
stephen hemmingerstephen hemminger105.52%15.56%
david s. millerdavid s. miller105.52%15.56%
jeroen vreekenjeroen vreeken105.52%15.56%
arnaldo carvalho de meloarnaldo carvalho de melo63.31%211.11%
jarek poplawskijarek poplawski52.76%15.56%
james morrisjames morris21.10%15.56%
ralf baechleralf baechle21.10%15.56%
Total181100.00%18100.00%


static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) { struct sock *sk = sock->sk; struct nr_sock *nr = nr_sk(sk); struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; struct net_device *dev; ax25_uid_assoc *user; ax25_address *source; lock_sock(sk); if (!sock_flag(sk, SOCK_ZAPPED)) { release_sock(sk); return -EINVAL; } if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) { release_sock(sk); return -EINVAL; } if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) { release_sock(sk); return -EINVAL; } if (addr->fsa_ax25.sax25_family != AF_NETROM) { release_sock(sk); return -EINVAL; } if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) { release_sock(sk); return -EADDRNOTAVAIL; } /* * Only the super user can set an arbitrary user callsign. */ if (addr->fsa_ax25.sax25_ndigis == 1) { if (!capable(CAP_NET_BIND_SERVICE)) { dev_put(dev); release_sock(sk); return -EPERM; } nr->user_addr = addr->fsa_digipeater[0]; nr->source_addr = addr->fsa_ax25.sax25_call; } else { source = &addr->fsa_ax25.sax25_call; user = ax25_findbyuid(current_euid()); if (user) { nr->user_addr = user->call; ax25_uid_put(user); } else { if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) { release_sock(sk); dev_put(dev); return -EPERM; } nr->user_addr = *source; } nr->source_addr = *source; } nr->device = dev; nr_insert_socket(sk); sock_reset_flag(sk, SOCK_ZAPPED); dev_put(dev); release_sock(sk); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git25267.56%1260.00%
jeroen vreekenjeroen vreeken7219.30%15.00%
ralf baechleralf baechle277.24%210.00%
thomas grafthomas graf102.68%15.00%
david s. millerdavid s. miller82.14%15.00%
david howellsdavid howells20.54%15.00%
arnaldo carvalho de meloarnaldo carvalho de melo10.27%15.00%
zhao hongjiangzhao hongjiang10.27%15.00%
Total373100.00%20100.00%


static int nr_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) { struct sock *sk = sock->sk; struct nr_sock *nr = nr_sk(sk); struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr; ax25_address *source = NULL; ax25_uid_assoc *user; struct net_device *dev; int err = 0; lock_sock(sk); if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { sock->state = SS_CONNECTED; goto out_release; /* Connect completed during a ERESTARTSYS event */ } if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { sock->state = SS_UNCONNECTED; err = -ECONNREFUSED; goto out_release; } if (sk->sk_state == TCP_ESTABLISHED) { err = -EISCONN; /* No reconnect on a seqpacket socket */ goto out_release; } sk->sk_state = TCP_CLOSE; sock->state = SS_UNCONNECTED; if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) { err = -EINVAL; goto out_release; } if (addr->sax25_family != AF_NETROM) { err = -EINVAL; goto out_release; } if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ sock_reset_flag(sk, SOCK_ZAPPED); if ((dev = nr_dev_first()) == NULL) { err = -ENETUNREACH; goto out_release; } source = (ax25_address *)dev->dev_addr; user = ax25_findbyuid(current_euid()); if (user) { nr->user_addr = user->call; ax25_uid_put(user); } else { if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) { dev_put(dev); err = -EPERM; goto out_release; } nr->user_addr = *source; } nr->source_addr = *source; nr->device = dev; dev_put(dev); nr_insert_socket(sk); /* Finish the bind */ } nr->dest_addr = addr->sax25_call; release_sock(sk); circuit = nr_find_next_circuit(); lock_sock(sk); nr->my_index = circuit / 256; nr->my_id = circuit % 256; circuit++; /* Move to connecting socket, start sending Connect Requests */ sock->state = SS_CONNECTING; sk->sk_state = TCP_SYN_SENT; nr_establish_data_link(sk); nr->state = NR_STATE_1; nr_start_heartbeat(sk); /* Now the loop */ if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { err = -EINPROGRESS; goto out_release; } /* * A Connect Ack with Choke or timeout or failed routing will go to * closed. */ if (sk->sk_state == TCP_SYN_SENT) { DEFINE_WAIT(wait); for (;;) { prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); if (sk->sk_state != TCP_SYN_SENT) break; if (!signal_pending(current)) { release_sock(sk); schedule(); lock_sock(sk); continue; } err = -ERESTARTSYS