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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _LVM_DEV_CACHE_H
#define _LVM_DEV_CACHE_H
#include "device.h"
/*
* predicate for devices.
*/
struct dev_filter {
int (*passes_filter) (struct dev_filter * f, struct device * dev);
void (*destroy) (struct dev_filter * f);
unsigned use_count;
void *private;
};
/*
* The global device cache.
*/
struct cmd_context;
int dev_cache_init(struct cmd_context *cmd);
void dev_cache_exit(void);
/* Trigger(1) or avoid(0) a scan */
void dev_cache_scan(int do_scan);
int dev_cache_has_scanned(void);
int dev_cache_add_dir(const char *path);
int dev_cache_add_loopfile(const char *path);
struct device *dev_cache_get(const char *name, struct dev_filter *f);
void dev_set_preferred_name(struct str_list *sl, struct device *dev);
/*
* Object for iterating through the cache.
*/
struct dev_iter;
struct dev_iter *dev_iter_create(struct dev_filter *f, int dev_scan);
void dev_iter_destroy(struct dev_iter *iter);
struct device *dev_iter_get(struct dev_iter *iter);
void dev_reset_error_count(struct cmd_context *cmd);
#endif
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