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/rose/rose_timer.c | 216 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 216 insertions(+) create mode 100644 net/rose/rose_timer.c (limited to 'net/rose/rose_timer.c') diff --git a/net/rose/rose_timer.c b/net/rose/rose_timer.c new file mode 100644 index 000000000000..84dd4403f792 --- /dev/null +++ b/net/rose/rose_timer.c @@ -0,0 +1,216 @@ +/* + * 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 + +static void rose_heartbeat_expiry(unsigned long); +static void rose_timer_expiry(unsigned long); +static void rose_idletimer_expiry(unsigned long); + +void rose_start_heartbeat(struct sock *sk) +{ + del_timer(&sk->sk_timer); + + sk->sk_timer.data = (unsigned long)sk; + sk->sk_timer.function = &rose_heartbeat_expiry; + sk->sk_timer.expires = jiffies + 5 * HZ; + + add_timer(&sk->sk_timer); +} + +void rose_start_t1timer(struct sock *sk) +{ + struct rose_sock *rose = rose_sk(sk); + + del_timer(&rose->timer); + + rose->timer.data = (unsigned long)sk; + rose->timer.function = &rose_timer_expiry; + rose->timer.expires = jiffies + rose->t1; + + add_timer(&rose->timer); +} + +void rose_start_t2timer(struct sock *sk) +{ + struct rose_sock *rose = rose_sk(sk); + + del_timer(&rose->timer); + + rose->timer.data = (unsigned long)sk; + rose->timer.function = &rose_timer_expiry; + rose->timer.expires = jiffies + rose->t2; + + add_timer(&rose->timer); +} + +void rose_start_t3timer(struct sock *sk) +{ + struct rose_sock *rose = rose_sk(sk); + + del_timer(&rose->timer); + + rose->timer.data = (unsigned long)sk; + rose->timer.function = &rose_timer_expiry; + rose->timer.expires = jiffies + rose->t3; + + add_timer(&rose->timer); +} + +void rose_start_hbtimer(struct sock *sk) +{ + struct rose_sock *rose = rose_sk(sk); + + del_timer(&rose->timer); + + rose->timer.data = (unsigned long)sk; + rose->timer.function = &rose_timer_expiry; + rose->timer.expires = jiffies + rose->hb; + + add_timer(&rose->timer); +} + +void rose_start_idletimer(struct sock *sk) +{ + struct rose_sock *rose = rose_sk(sk); + + del_timer(&rose->idletimer); + + if (rose->idle > 0) { + rose->idletimer.data = (unsigned long)sk; + rose->idletimer.function = &rose_idletimer_expiry; + rose->idletimer.expires = jiffies + rose->idle; + + add_timer(&rose->idletimer); + } +} + +void rose_stop_heartbeat(struct sock *sk) +{ + del_timer(&sk->sk_timer); +} + +void rose_stop_timer(struct sock *sk) +{ + del_timer(&rose_sk(sk)->timer); +} + +void rose_stop_idletimer(struct sock *sk) +{ + del_timer(&rose_sk(sk)->idletimer); +} + +static void rose_heartbeat_expiry(unsigned long param) +{ + struct sock *sk = (struct sock *)param; + struct rose_sock *rose = rose_sk(sk); + + bh_lock_sock(sk); + switch (rose->state) { + case ROSE_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))) { + rose_destroy_socket(sk); + return; + } + break; + + case ROSE_STATE_3: + /* + * Check for the state of the receive buffer. + */ + if (atomic_read(&sk->sk_rmem_alloc) < (sk->sk_rcvbuf / 2) && + (rose->condition & ROSE_COND_OWN_RX_BUSY)) { + rose->condition &= ~ROSE_COND_OWN_RX_BUSY; + rose->condition &= ~ROSE_COND_ACK_PENDING; + rose->vl = rose->vr; + rose_write_internal(sk, ROSE_RR); + rose_stop_timer(sk); /* HB */ + break; + } + break; + } + + rose_start_heartbeat(sk); + bh_unlock_sock(sk); +} + +static void rose_timer_expiry(unsigned long param) +{ + struct sock *sk = (struct sock *)param; + struct rose_sock *rose = rose_sk(sk); + + bh_lock_sock(sk); + switch (rose->state) { + case ROSE_STATE_1: /* T1 */ + case ROSE_STATE_4: /* T2 */ + rose_write_internal(sk, ROSE_CLEAR_REQUEST); + rose->state = ROSE_STATE_2; + rose_start_t3timer(sk); + break; + + case ROSE_STATE_2: /* T3 */ + rose->neighbour->use--; + rose_disconnect(sk, ETIMEDOUT, -1, -1); + break; + + case ROSE_STATE_3: /* HB */ + if (rose->condition & ROSE_COND_ACK_PENDING) { + rose->condition &= ~ROSE_COND_ACK_PENDING; + rose_enquiry_response(sk); + } + break; + } + bh_unlock_sock(sk); +} + +static void rose_idletimer_expiry(unsigned long param) +{ + struct sock *sk = (struct sock *)param; + + bh_lock_sock(sk); + rose_clear_queues(sk); + + rose_write_internal(sk, ROSE_CLEAR_REQUEST); + rose_sk(sk)->state = ROSE_STATE_2; + + rose_start_t3timer(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); +} -- cgit v1.2.3