external/gpl2/lvm2/dist/lib/metadata/pv_map.h

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
   5  * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
   6  *
   7  * This file is part of LVM2.
   8  *
   9  * This copyrighted material is made available to anyone wishing to use,
  10  * modify, copy, or redistribute it subject to the terms and conditions
  11  * of the GNU Lesser General Public License v.2.1.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public License
  14  * along with this program; if not, write to the Free Software Foundation,
  15  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  16  */
  17
  18 #ifndef _LVM_PV_MAP_H
  19 #define _LVM_PV_MAP_H
  20
  21 #include "metadata.h"
  22
  23 /*
  24  * The in core rep. only stores a mapping from
  25  * logical extents to physical extents against an
  26  * lv.  Sometimes, when allocating a new lv for
  27  * instance, it is useful to have the inverse
  28  * mapping available.
  29  */
  30
  31 struct pv_area {
  32         struct pv_map *map;
  33         uint32_t start;
  34         uint32_t count;
  35
  36         struct dm_list list;            /* pv_map.areas */
  37 };
  38
  39 struct pv_map {
  40         struct physical_volume *pv;
  41         struct dm_list areas;           /* struct pv_areas */
  42         uint32_t pe_count;              /* Total number of PEs */
  43
  44         struct dm_list list;
  45 };
  46
  47 /*
  48  * Find intersection between available_pvs and free space in VG
  49  */
  50 struct dm_list *create_pv_maps(struct dm_pool *mem, struct volume_group *vg,
  51                             struct dm_list *allocatable_pvs);
  52
  53 void consume_pv_area(struct pv_area *area, uint32_t to_go);
  54
  55 uint32_t pv_maps_size(struct dm_list *pvms);
  56
  57 #endif