From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- net/netrom/nr_timer.c | 260 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 260 insertions(+) create mode 100644 net/netrom/nr_timer.c (limited to 'net/netrom/nr_timer.c') diff --git a/net/netrom/nr_timer.c b/net/netrom/nr_timer.c new file mode 100644 index 00000000000..faabda8088b --- /dev/null +++ b/net/netrom/nr_timer.c @@ -0,0 +1,260 @@ +/* + * 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 (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) + * Copyright (C) 2002 Ralf Baechle DO1GRB (ralf@gnu.org) + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static void nr_heartbeat_expiry(unsigned long); +static void nr_t1timer_expiry(unsigned long); +static void nr_t2timer_expiry(unsigned long); +static void nr_t4timer_expiry(unsigned long); +static void nr_idletimer_expiry(unsigned long); + +void nr_init_timers(struct sock *sk) +{ + struct nr_sock *nr = nr_sk(sk); + + init_timer(&nr->t1timer); + nr->t1timer.data = (unsigned long)sk; + nr->t1timer.function = &nr_t1timer_expiry; + + init_timer(&nr->t2timer); + nr->t2timer.data = (unsigned long)sk; + nr->t2timer.function = &nr_t2timer_expiry; + + init_timer(&nr->t4timer); + nr->t4timer.data = (unsigned long)sk; + nr->t4timer.function = &nr_t4timer_expiry; + + init_timer(&nr->idletimer); + nr->idletimer.data = (unsigned long)sk; + nr->idletimer.function = &nr_idletimer_expiry; + + /* initialized by sock_init_data */ + sk->sk_timer.data = (unsigned long)sk; + sk->sk_timer.function = &nr_heartbeat_expiry; +} + +void nr_start_t1timer(struct sock *sk) +{ + struct nr_sock *nr = nr_sk(sk); + + mod_timer(&nr->t1timer, jiffies + nr->t1); +} + +void nr_start_t2timer(struct sock *sk) +{ + struct nr_sock *nr = nr_sk(sk); + + mod_timer(&nr->t2timer, jiffies + nr->t2); +} + +void nr_start_t4timer(struct sock *sk) +{ + struct nr_sock *nr = nr_sk(sk); + + mod_timer(&nr->t4timer, jiffies + nr->t4); +} + +void nr_start_idletimer(struct sock *sk) +{ + struct nr_sock *nr = nr_sk(sk); + + if (nr->idle > 0) + mod_timer(&nr->idletimer, jiffies + nr->idle); +} + +void nr_start_heartbeat(struct sock *sk) +{ + mod_timer(&sk->sk_timer, jiffies + 5 * HZ); +} + +void nr_stop_t1timer(struct sock *sk) +{ + del_timer(&nr_sk(sk)->t1timer); +} + +void nr_stop_t2timer(struct sock *sk) +{ + del_timer(&nr_sk(sk)->t2timer); +} + +void nr_stop_t4timer(struct sock *sk) +{ + del_timer(&nr_sk(sk)->t4timer); +} + +void nr_stop_idletimer(struct sock *sk) +{ + del_timer(&nr_sk(sk)->idletimer); +} + +void nr_stop_heartbeat(struct sock *sk) +{ + del_timer(&sk->sk_timer); +} + +int nr_t1timer_running(struct sock *sk) +{ + return timer_pending(&nr_sk(sk)->t1timer); +} + +static void nr_heartbeat_expiry(unsigned long param) +{ + struct sock *sk = (struct sock *)param; + struct nr_sock *nr = nr_sk(sk); + + bh_lock_sock(sk); + switch (nr->state) { + case NR_STATE_0: + /* Magic here: If we listen() and a new link dies before it + is accepted() it isn't 'dead' so doesn't get removed. */ + if (sock_flag(sk, SOCK_DESTROY) || + (sk->sk_state == TCP_LISTEN && sock_flag(sk, SOCK_DEAD))) { + sock_hold(sk); + nr_destroy_socket(sk); + bh_unlock_sock(sk); + sock_put(sk); + return; + } + break; + + case NR_STATE_3: + /* + * Check for the state of the receive buffer. + */ + if (atomic_read(&sk->sk_rmem_alloc) < (sk->sk_rcvbuf / 2) && + (nr->condition & NR_COND_OWN_RX_BUSY)) { + nr->condition &= ~NR_COND_OWN_RX_BUSY; + nr->condition &= ~NR_COND_ACK_PENDING; + nr->vl = nr->vr; + nr_write_internal(sk, NR_INFOACK); + break; + } + break; + } + + nr_start_heartbeat(sk); + bh_unlock_sock(sk); +} + +static void nr_t2timer_expiry(unsigned long param) +{ + struct sock *sk = (struct sock *)param; + struct nr_sock *nr = nr_sk(sk); + + bh_lock_sock(sk); + if (nr->condition & NR_COND_ACK_PENDING) { + nr->condition &= ~NR_COND_ACK_PENDING; + nr_enquiry_response(sk); + } + bh_unlock_sock(sk); +} + +static void nr_t4timer_expiry(unsigned long param) +{ + struct sock *sk = (struct sock *)param; + + bh_lock_sock(sk); + nr_sk(sk)->condition &= ~NR_COND_PEER_RX_BUSY; + bh_unlock_sock(sk); +} + +static void nr_idletimer_expiry(unsigned long param) +{ + struct sock *sk = (struct sock *)param; + struct nr_sock *nr = nr_sk(sk); + + bh_lock_sock(sk); + + nr_clear_queues(sk); + + nr->n2count = 0; + nr_write_internal(sk, NR_DISCREQ); + nr->state = NR_STATE_2; + + nr_start_t1timer(sk); + nr_stop_t2timer(sk); + nr_stop_t4timer(sk); + + sk->sk_state = TCP_CLOSE; + sk->sk_err = 0; + sk->sk_shutdown |= SEND_SHUTDOWN; + + if (!sock_flag(sk, SOCK_DEAD)) { + sk->sk_state_change(sk); + sock_set_flag(sk, SOCK_DEAD); + } + bh_unlock_sock(sk); +} + +static void nr_t1timer_expiry(unsigned long param) +{ + struct sock *sk = (struct sock *)param; + struct nr_sock *nr = nr_sk(sk); + + bh_lock_sock(sk); + switch (nr->state) { + case NR_STATE_1: + if (nr->n2count == nr->n2) { + nr_disconnect(sk, ETIMEDOUT); + bh_unlock_sock(sk); + return; + } else { + nr->n2count++; + nr_write_internal(sk, NR_CONNREQ); + } + break; + + case NR_STATE_2: + if (nr->n2count == nr->n2) { + nr_disconnect(sk, ETIMEDOUT); + bh_unlock_sock(sk); + return; + } else { + nr->n2count++; + nr_write_internal(sk, NR_DISCREQ); + } + break; + + case NR_STATE_3: + if (nr->n2count == nr->n2) { + nr_disconnect(sk, ETIMEDOUT); + bh_unlock_sock(sk); + return; + } else { + nr->n2count++; + nr_requeue_frames(sk); + } + break; + } + + nr_start_t1timer(sk); + bh_unlock_sock(sk); +} -- cgit v1.2.3