mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-22 17:35:59 +03:00
74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
/*
|
|
* 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
|