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74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* 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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*/
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#ifndef _LVM_PV_MAP_H
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#define _LVM_PV_MAP_H
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#include "metadata.h"
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/*
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* The in core rep. only stores a mapping from
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* logical extents to physical extents against an
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* lv. Sometimes, when allocating a new lv for
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* instance, it is useful to have the inverse
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* mapping available.
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*/
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struct pv_area {
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struct pv_map *map;
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uint32_t start;
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uint32_t count;
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/* Number of extents unreserved during a single allocation pass. */
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uint32_t unreserved;
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struct dm_list list; /* pv_map.areas */
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};
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/*
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* When building up a potential group of "parallel" extent ranges during
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* an allocation attempt, track the maximum number of extents that may
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* need to be used as a particular parallel area. Several of these
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* structs may reference the same pv_area, but 'used' may differ between
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* them. The sum of all the 'used' variables referring to the same
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* pv_area may not exceed that area's count, so we cannot allocate the
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* same extents twice.
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*/
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struct pv_area_used {
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struct pv_area *pva;
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uint32_t used;
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};
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struct pv_map {
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struct physical_volume *pv;
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struct dm_list areas; /* struct pv_areas */
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uint32_t pe_count; /* Total number of PEs */
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struct dm_list list;
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};
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/*
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* Find intersection between available_pvs and free space in VG
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*/
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struct dm_list *create_pv_maps(struct dm_pool *mem, struct volume_group *vg,
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struct dm_list *allocatable_pvs);
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void consume_pv_area(struct pv_area *pva, uint32_t to_go);
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void reinsert_changed_pv_area(struct pv_area *pva);
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uint32_t pv_maps_size(struct dm_list *pvms);
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#endif
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