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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _LVM_DEV_CACHE_H
#define _LVM_DEV_CACHE_H
#include "lib/device/device.h"
#include "lib/device/dev-type.h"
#include "lib/misc/lvm-wrappers.h"
struct cmd_context;
/*
* predicate for devices.
*/
struct dev_filter {
int (*passes_filter) (struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name);
void (*destroy) (struct dev_filter *f);
void (*wipe) (struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name);
void *private;
unsigned use_count;
const char *name;
};
struct dm_list *dev_cache_get_dev_list_for_vgid(const char *vgid);
struct dm_list *dev_cache_get_dev_list_for_lvid(const char *lvid);
/*
* The global device cache.
*/
int dev_cache_init(struct cmd_context *cmd);
int dev_cache_exit(void);
/*
* Returns number of open devices.
*/
int dev_cache_check_for_open_devices(void);
void dev_cache_scan(struct cmd_context *cmd);
int dev_cache_has_scanned(void);
int dev_cache_add_dir(const char *path);
struct device *dev_cache_get(struct cmd_context *cmd, const char *name, struct dev_filter *f);
struct device *dev_cache_get_existing(struct cmd_context *cmd, const char *name, struct dev_filter *f);
struct device *dev_cache_get_by_devt(struct cmd_context *cmd, dev_t devt);
void dev_cache_verify_aliases(struct device *dev);
struct device *dev_hash_get(const char *name);
void dev_set_preferred_name(struct dm_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 unused);
void dev_iter_destroy(struct dev_iter *iter);
struct device *dev_iter_get(struct cmd_context *cmd, struct dev_iter *iter);
void dev_cache_failed_path(struct device *dev, const char *path);
bool dev_cache_has_md_with_end_superblock(struct dev_types *dt);
int get_sysfs_value(const char *path, char *buf, size_t buf_size, int error_if_no_value);
int get_dm_uuid_from_sysfs(char *buf, size_t buf_size, int major, int minor);
int setup_devices_file(struct cmd_context *cmd);
int setup_devices(struct cmd_context *cmd);
int setup_devices_no_file_match(struct cmd_context *cmd);
int setup_device(struct cmd_context *cmd, const char *devname);
#endif
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