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/*
* Copyright ( C ) 2011 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_LVMETAD_CLIENT_H
# define _LVM_LVMETAD_CLIENT_H
# include "daemon-client.h"
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# include "metadata-exported.h"
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/* Different types of replies we may get from lvmetad. */
typedef struct {
daemon_reply r ;
const char * * uuids ; /* NULL terminated array */
} lvmetad_uuidlist ;
typedef struct {
daemon_reply r ;
struct config_tree * cft ;
} lvmetad_vg ;
static inline daemon_handle lvmetad_open ( ) ;
static inline void lvmetad_close ( daemon_handle h ) ;
/* Get a list of VG UUIDs that match a given VG name. */
lvmetad_uuidlist lvmetad_lookup_vgname ( daemon_handle h , const char * name ) ;
/* Get the metadata of a single VG, identified by UUID. */
lvmetad_vg lvmetad_get_vg ( daemon_handle h , const char * uuid ) ;
/*
* Add and remove PVs on demand . Udev - driven systems will use this interface
* instead of scanning .
*/
daemon_reply lvmetad_add_pv ( daemon_handle h , const char * pv_uuid , const char * mda_content ) ;
daemon_reply lvmetad_remove_pv ( daemon_handle h , const char * pv_uuid ) ;
/* Trigger a full disk scan, throwing away all caches. XXX do we eventually want
* this ? Probalby not yet , anyway .
* daemon_reply lvmetad_rescan ( daemon_handle h ) ;
*/
/*
* Update the version of metadata of a volume group . The VG has to be locked for
* writing for this , and the VG metadata here has to match whatever has been
* written to the disk ( under this lock ) . This initially avoids the requirement
* for lvmetad to write to disk ( in later revisions , lvmetad_supersede_vg may
* also do the writing , or we probably add another function to do that ) .
*/
daemon_reply lvmetad_supersede_vg ( daemon_handle h , struct volume_group * vg ) ;
/* Implementation of inline functions */
static inline daemon_handle lvmetad_open ( )
{
/* TODO configurable */
daemon_info lvmetad_info = {
. path = " lvmetad " ,
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. socket = " /var/run/lvm/lvmetad.socket " ,
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. autostart = 1
} ;
return daemon_open ( lvmetad_info ) ;
}
static inline void lvmetad_close ( daemon_handle h )
{
return daemon_close ( h ) ;
}
# endif