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/*
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* Copyright ( C ) 2001 - 2004 Sistina Software , Inc . All rights reserved .
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* Copyright ( C ) 2004 - 2007 Red Hat , Inc . All rights reserved .
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*
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* 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
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* of the GNU Lesser General Public License v .2 .1 .
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program ; if not , write to the Free Software Foundation ,
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* Inc . , 51 Franklin Street , Fifth Floor , Boston , MA 02110 - 1301 USA
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*/
# ifndef _LVM_DEV_CACHE_H
# define _LVM_DEV_CACHE_H
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# include "lib/device/device.h"
# include "lib/misc/lvm-wrappers.h"
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struct cmd_context ;
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/*
* predicate for devices .
*/
struct dev_filter {
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int ( * passes_filter ) ( struct cmd_context * cmd , struct dev_filter * f , struct device * dev , const char * use_filter_name ) ;
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void ( * destroy ) ( struct dev_filter * f ) ;
void ( * wipe ) ( struct dev_filter * f ) ;
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void * private ;
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unsigned use_count ;
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const char * name ;
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} ;
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int dev_cache_index_devs ( void ) ;
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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 ) ;
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/*
* The global device cache .
*/
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int dev_cache_init ( struct cmd_context * cmd ) ;
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int dev_cache_exit ( void ) ;
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/*
* Returns number of open devices .
*/
int dev_cache_check_for_open_devices ( void ) ;
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void dev_cache_scan ( void ) ;
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int dev_cache_has_scanned ( void ) ;
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int dev_cache_add_dir ( const char * path ) ;
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struct device * dev_cache_get ( struct cmd_context * cmd , const char * name , struct dev_filter * f ) ;
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const char * dev_cache_filtered_reason ( const char * name ) ;
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struct device * dev_cache_get_by_devt ( struct cmd_context * cmd , dev_t device , struct dev_filter * f , int * filtered ) ;
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void dev_set_preferred_name ( struct dm_str_list * sl , struct device * dev ) ;
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/*
* Object for iterating through the cache .
*/
struct dev_iter ;
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struct dev_iter * dev_iter_create ( struct dev_filter * f , int unused ) ;
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void dev_iter_destroy ( struct dev_iter * iter ) ;
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struct device * dev_iter_get ( struct cmd_context * cmd , struct dev_iter * iter ) ;
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void dev_reset_error_count ( struct cmd_context * cmd ) ;
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void dev_cache_failed_path ( struct device * dev , const char * path ) ;
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# endif