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      1 /*	$NetBSD: layout.h,v 1.1.1.1 2008/12/22 00:18:17 haad Exp $	*/
      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_TEXT_LAYOUT_H
     19 #define _LVM_TEXT_LAYOUT_H
     20 
     21 #include "config.h"
     22 #include "lvm-types.h"
     23 #include "metadata.h"
     24 #include "uuid.h"
     25 
     26 /* On disk */
     27 struct disk_locn {
     28 	uint64_t offset;	/* Offset in bytes to start sector */
     29 	uint64_t size;		/* Bytes */
     30 } __attribute__ ((packed));
     31 
     32 /* Data areas (holding PEs) */
     33 struct data_area_list {
     34 	struct dm_list list;
     35 	struct disk_locn disk_locn;
     36 };
     37 
     38 /* Fields with the suffix _xl should be xlate'd wherever they appear */
     39 /* On disk */
     40 struct pv_header {
     41 	int8_t pv_uuid[ID_LEN];
     42 
     43 	/* This size can be overridden if PV belongs to a VG */
     44 	uint64_t device_size_xl;	/* Bytes */
     45 
     46 	/* NULL-terminated list of data areas followed by */
     47 	/* NULL-terminated list of metadata area headers */
     48 	struct disk_locn disk_areas_xl[0];	/* Two lists */
     49 } __attribute__ ((packed));
     50 
     51 /* On disk */
     52 struct raw_locn {
     53 	uint64_t offset;	/* Offset in bytes to start sector */
     54 	uint64_t size;		/* Bytes */
     55 	uint32_t checksum;
     56 	uint32_t filler;
     57 } __attribute__ ((packed));
     58 
     59 /* On disk */
     60 /* Structure size limited to one sector */
     61 struct mda_header {
     62 	uint32_t checksum_xl;	/* Checksum of rest of mda_header */
     63 	int8_t magic[16];	/* To aid scans for metadata */
     64 	uint32_t version;
     65 	uint64_t start;		/* Absolute start byte of mda_header */
     66 	uint64_t size;		/* Size of metadata area */
     67 
     68 	struct raw_locn raw_locns[0];	/* NULL-terminated list */
     69 } __attribute__ ((packed));
     70 
     71 struct mda_lists {
     72 	struct dm_list dirs;
     73 	struct dm_list raws;
     74 	struct metadata_area_ops *file_ops;
     75 	struct metadata_area_ops *raw_ops;
     76 };
     77 
     78 struct mda_context {
     79 	struct device_area area;
     80 	uint64_t free_sectors;
     81 	struct raw_locn rlocn;	/* Store inbetween write and commit */
     82 };
     83 
     84 /* FIXME Convert this at runtime */
     85 #define FMTT_MAGIC "\040\114\126\115\062\040\170\133\065\101\045\162\060\116\052\076"
     86 #define FMTT_VERSION 1
     87 #define MDA_HEADER_SIZE 512
     88 #define LVM2_LABEL "LVM2 001"
     89 #define MDA_SIZE_MIN (8 * (unsigned) lvm_getpagesize())
     90 
     91 #endif
     92