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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2006 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_PV_MAP_H
#define _LVM_PV_MAP_H
#include "metadata.h"
/*
* The in core rep. only stores a mapping from
* logical extents to physical extents against an
* lv. Sometimes, when allocating a new lv for
* instance, it is useful to have the inverse
* mapping available.
*/
struct pv_area {
struct pv_map *map;
uint32_t start;
uint32_t count;
/* Number of extents unreserved during a single allocation pass. */
uint32_t unreserved;
struct dm_list list; /* pv_map.areas */
};
/*
* When building up a potential group of "parallel" extent ranges during
* an allocation attempt, track the maximum number of extents that may
* need to be used as a particular parallel area. Several of these
* structs may reference the same pv_area, but 'used' may differ between
* them. The sum of all the 'used' variables referring to the same
* pv_area may not exceed that area's count, so we cannot allocate the
* same extents twice.
*/
struct pv_area_used {
struct pv_area *pva;
uint32_t used;
};
struct pv_map {
struct physical_volume *pv;
struct dm_list areas; /* struct pv_areas */
uint32_t pe_count; /* Total number of PEs */
struct dm_list list;
};
/*
* Find intersection between available_pvs and free space in VG
*/
struct dm_list *create_pv_maps(struct dm_pool *mem, struct volume_group *vg,
struct dm_list *allocatable_pvs);
void consume_pv_area(struct pv_area *area, uint32_t to_go);
void reinsert_changed_pv_area(struct pv_area *pva);
uint32_t pv_maps_size(struct dm_list *pvms);
#endif
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