diff options
Diffstat (limited to 'fs/afs/kafstimod.c')
| -rw-r--r-- | fs/afs/kafstimod.c | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/fs/afs/kafstimod.c b/fs/afs/kafstimod.c deleted file mode 100644 index 694344e4d3c7..000000000000 --- a/fs/afs/kafstimod.c +++ /dev/null @@ -1,205 +0,0 @@ -/* kafstimod.c: AFS timeout daemon - * - * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - * 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. - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/completion.h> -#include <linux/freezer.h> -#include "cell.h" -#include "volume.h" -#include "kafstimod.h" -#include <asm/errno.h> -#include "internal.h" - -static DECLARE_COMPLETION(kafstimod_alive); -static DECLARE_COMPLETION(kafstimod_dead); -static DECLARE_WAIT_QUEUE_HEAD(kafstimod_sleepq); -static int kafstimod_die; - -static LIST_HEAD(kafstimod_list); -static DEFINE_SPINLOCK(kafstimod_lock); - -static int kafstimod(void *arg); - -/*****************************************************************************/ -/* - * start the timeout daemon - */ -int afs_kafstimod_start(void) -{ - int ret; - - ret = kernel_thread(kafstimod, NULL, 0); - if (ret < 0) - return ret; - - wait_for_completion(&kafstimod_alive); - - return ret; -} /* end afs_kafstimod_start() */ - -/*****************************************************************************/ -/* - * stop the timeout daemon - */ -void afs_kafstimod_stop(void) -{ - /* get rid of my daemon */ - kafstimod_die = 1; - wake_up(&kafstimod_sleepq); - wait_for_completion(&kafstimod_dead); - -} /* end afs_kafstimod_stop() */ - -/*****************************************************************************/ -/* - * timeout processing daemon - */ -static int kafstimod(void *arg) -{ - struct afs_timer *timer; - - DECLARE_WAITQUEUE(myself, current); - - printk("kAFS: Started kafstimod %d\n", current->pid); - - daemonize("kafstimod"); - - complete(&kafstimod_alive); - - /* loop around looking for things to attend to */ - loop: - set_current_state(TASK_INTERRUPTIBLE); - add_wait_queue(&kafstimod_sleepq, &myself); - - for (;;) { - unsigned long jif; - signed long timeout; - - /* deal with the server being asked to die */ - if (kafstimod_die) { - remove_wait_queue(&kafstimod_sleepq, &myself); - _leave(""); - complete_and_exit(&kafstimod_dead, 0); - } - - try_to_freeze(); - - /* discard pending signals */ - afs_discard_my_signals(); - - /* work out the time to elapse before the next event */ - spin_lock(&kafstimod_lock); - if (list_empty(&kafstimod_list)) { - timeout = MAX_SCHEDULE_TIMEOUT; - } - else { - timer = list_entry(kafstimod_list.next, - struct afs_timer, link); - timeout = timer->timo_jif; - jif = jiffies; - - if (time_before_eq((unsigned long) timeout, jif)) - goto immediate; - - else { - timeout = (long) timeout - (long) jiffies; - } - } - spin_unlock(&kafstimod_lock); - - schedule_timeout(timeout); - - set_current_state(TASK_INTERRUPTIBLE); - } - - /* the thing on the front of the queue needs processing - * - we come here with the lock held and timer pointing to the expired - * entry - */ - immediate: - remove_wait_queue(&kafstimod_sleepq, &myself); - set_current_state(TASK_RUNNING); - - _debug("@@@ Begin Timeout of %p", timer); - - /* dequeue the timer */ - list_del_init(&timer->link); - spin_unlock(&kafstimod_lock); - - /* call the timeout function */ - timer->ops->timed_out(timer); - - _debug("@@@ End Timeout"); - goto loop; - -} /* end kafstimod() */ - -/*****************************************************************************/ -/* - * (re-)queue a timer - */ -void afs_kafstimod_add_timer(struct afs_timer *timer, unsigned long timeout) -{ - struct afs_timer *ptimer; - struct list_head *_p; - - _enter("%p,%lu", timer, timeout); - - spin_lock(&kafstimod_lock); - - list_del(&timer->link); - - /* the timer was deferred or reset - put it back in the queue at the - * right place */ - timer->timo_jif = jiffies + timeout; - - list_for_each(_p, &kafstimod_list) { - ptimer = list_entry(_p, struct afs_timer, link); - if (time_before(timer->timo_jif, ptimer->timo_jif)) - break; - } - - list_add_tail(&timer->link, _p); /* insert before stopping point */ - - spin_unlock(&kafstimod_lock); - - wake_up(&kafstimod_sleepq); - - _leave(""); -} /* end afs_kafstimod_add_timer() */ - -/*****************************************************************************/ -/* - * dequeue a timer - * - returns 0 if the timer was deleted or -ENOENT if it wasn't queued - */ -int afs_kafstimod_del_timer(struct afs_timer *timer) -{ - int ret = 0; - - _enter("%p", timer); - - spin_lock(&kafstimod_lock); - - if (list_empty(&timer->link)) - ret = -ENOENT; - else - list_del_init(&timer->link); - - spin_unlock(&kafstimod_lock); - - wake_up(&kafstimod_sleepq); - - _leave(" = %d", ret); - return ret; -} /* end afs_kafstimod_del_timer() */ |