| /* |
| * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 |