/* ----------------------------------------------------------------------- *
*
* state.h - state queue functions.
*
* Copyright 2006 Ian Kent <raven@themaw.net>
*
* 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, Inc., 675 Mass Ave, Cambridge MA 02139,
* USA; either version 2 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* ----------------------------------------------------------------------- */
#ifndef STATE_H
#define STATE_H
#include <string.h>
#include <stdlib.h>
#include <signal.h>
#include "automount.h"
/*
* State machine for daemon
*
* READY - reads from pipe; performs mount/umount operations
* PRUNE - generates prune events in subprocess; reads from pipe
* READMAP - read read map for maps taht use cache
* EXPIRE - generates expire events in subprocess; reads from pipe
* SHUTDOWN_PENDING - as prune, but goes to SHUTDOWN when done
* SHUTDOWN - unmount autofs, exit
*
*/
enum states {
ST_ANY = -2,
ST_INVAL,
ST_INIT,
ST_READY,
ST_EXPIRE,
ST_PRUNE,
ST_READMAP,
ST_SHUTDOWN_PENDING,
ST_SHUTDOWN_FORCE,
ST_SHUTDOWN
};
struct expire_args {
pthread_mutex_t mutex;
pthread_cond_t cond;
unsigned int signaled;
struct autofs_point *ap; /* autofs mount we are working on */
enum states state; /* State prune or expire */
unsigned int when; /* Immediate expire ? */
int status; /* Return status */
};
#define expire_args_mutex_lock(ea) \
do { \
int _ea_lock = pthread_mutex_lock(&ea->mutex); \
if (_ea_lock) \
fatal(_ea_lock); \
} while (0)
#define expire_args_mutex_unlock(ea) \
do { \
int _ea_unlock = pthread_mutex_unlock(&ea->mutex); \
if (_ea_unlock) \
fatal(_ea_unlock); \
} while (0)
struct readmap_args {
pthread_mutex_t mutex;
pthread_cond_t cond;
unsigned int signaled;
struct autofs_point *ap; /* autofs mount we are working on */
time_t now; /* Time when map is read */
};
void st_mutex_lock(void);
void st_mutex_unlock(void);
void expire_cleanup(void *);
void expire_proc_cleanup(void *);
void nextstate(int, enum states);
int st_add_task(struct autofs_point *, enum states);
int __st_add_task(struct autofs_point *, enum states);
void st_remove_tasks(struct autofs_point *);
int st_wait_task(struct autofs_point *, enum states, unsigned int);
int st_wait_state(struct autofs_point *ap, enum states state);
int st_start_handler(void);
#endif