xref: /dflybsd-src/contrib/lvm2/dist/lib/format_text/layout.h (revision 86d7f5d305c6adaa56ff4582ece9859d73106103)
186d7f5d3SJohn Marino /*	$NetBSD: layout.h,v 1.1.1.1 2008/12/22 00:18:17 haad Exp $	*/
286d7f5d3SJohn Marino 
386d7f5d3SJohn Marino /*
486d7f5d3SJohn Marino  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
586d7f5d3SJohn Marino  * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
686d7f5d3SJohn Marino  *
786d7f5d3SJohn Marino  * This file is part of LVM2.
886d7f5d3SJohn Marino  *
986d7f5d3SJohn Marino  * This copyrighted material is made available to anyone wishing to use,
1086d7f5d3SJohn Marino  * modify, copy, or redistribute it subject to the terms and conditions
1186d7f5d3SJohn Marino  * of the GNU Lesser General Public License v.2.1.
1286d7f5d3SJohn Marino  *
1386d7f5d3SJohn Marino  * You should have received a copy of the GNU Lesser General Public License
1486d7f5d3SJohn Marino  * along with this program; if not, write to the Free Software Foundation,
1586d7f5d3SJohn Marino  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
1686d7f5d3SJohn Marino  */
1786d7f5d3SJohn Marino 
1886d7f5d3SJohn Marino #ifndef _LVM_TEXT_LAYOUT_H
1986d7f5d3SJohn Marino #define _LVM_TEXT_LAYOUT_H
2086d7f5d3SJohn Marino 
2186d7f5d3SJohn Marino #include "config.h"
2286d7f5d3SJohn Marino #include "lvm-types.h"
2386d7f5d3SJohn Marino #include "metadata.h"
2486d7f5d3SJohn Marino #include "uuid.h"
2586d7f5d3SJohn Marino 
2686d7f5d3SJohn Marino /* On disk */
2786d7f5d3SJohn Marino struct disk_locn {
2886d7f5d3SJohn Marino 	uint64_t offset;	/* Offset in bytes to start sector */
2986d7f5d3SJohn Marino 	uint64_t size;		/* Bytes */
3086d7f5d3SJohn Marino } __attribute__ ((packed));
3186d7f5d3SJohn Marino 
3286d7f5d3SJohn Marino /* Data areas (holding PEs) */
3386d7f5d3SJohn Marino struct data_area_list {
3486d7f5d3SJohn Marino 	struct dm_list list;
3586d7f5d3SJohn Marino 	struct disk_locn disk_locn;
3686d7f5d3SJohn Marino };
3786d7f5d3SJohn Marino 
3886d7f5d3SJohn Marino /* Fields with the suffix _xl should be xlate'd wherever they appear */
3986d7f5d3SJohn Marino /* On disk */
4086d7f5d3SJohn Marino struct pv_header {
4186d7f5d3SJohn Marino 	int8_t pv_uuid[ID_LEN];
4286d7f5d3SJohn Marino 
4386d7f5d3SJohn Marino 	/* This size can be overridden if PV belongs to a VG */
4486d7f5d3SJohn Marino 	uint64_t device_size_xl;	/* Bytes */
4586d7f5d3SJohn Marino 
4686d7f5d3SJohn Marino 	/* NULL-terminated list of data areas followed by */
4786d7f5d3SJohn Marino 	/* NULL-terminated list of metadata area headers */
4886d7f5d3SJohn Marino 	struct disk_locn disk_areas_xl[0];	/* Two lists */
4986d7f5d3SJohn Marino } __attribute__ ((packed));
5086d7f5d3SJohn Marino 
5186d7f5d3SJohn Marino /* On disk */
5286d7f5d3SJohn Marino struct raw_locn {
5386d7f5d3SJohn Marino 	uint64_t offset;	/* Offset in bytes to start sector */
5486d7f5d3SJohn Marino 	uint64_t size;		/* Bytes */
5586d7f5d3SJohn Marino 	uint32_t checksum;
5686d7f5d3SJohn Marino 	uint32_t filler;
5786d7f5d3SJohn Marino } __attribute__ ((packed));
5886d7f5d3SJohn Marino 
5986d7f5d3SJohn Marino /* On disk */
6086d7f5d3SJohn Marino /* Structure size limited to one sector */
6186d7f5d3SJohn Marino struct mda_header {
6286d7f5d3SJohn Marino 	uint32_t checksum_xl;	/* Checksum of rest of mda_header */
6386d7f5d3SJohn Marino 	int8_t magic[16];	/* To aid scans for metadata */
6486d7f5d3SJohn Marino 	uint32_t version;
6586d7f5d3SJohn Marino 	uint64_t start;		/* Absolute start byte of mda_header */
6686d7f5d3SJohn Marino 	uint64_t size;		/* Size of metadata area */
6786d7f5d3SJohn Marino 
6886d7f5d3SJohn Marino 	struct raw_locn raw_locns[0];	/* NULL-terminated list */
6986d7f5d3SJohn Marino } __attribute__ ((packed));
7086d7f5d3SJohn Marino 
7186d7f5d3SJohn Marino struct mda_lists {
7286d7f5d3SJohn Marino 	struct dm_list dirs;
7386d7f5d3SJohn Marino 	struct dm_list raws;
7486d7f5d3SJohn Marino 	struct metadata_area_ops *file_ops;
7586d7f5d3SJohn Marino 	struct metadata_area_ops *raw_ops;
7686d7f5d3SJohn Marino };
7786d7f5d3SJohn Marino 
7886d7f5d3SJohn Marino struct mda_context {
7986d7f5d3SJohn Marino 	struct device_area area;
8086d7f5d3SJohn Marino 	uint64_t free_sectors;
8186d7f5d3SJohn Marino 	struct raw_locn rlocn;	/* Store inbetween write and commit */
8286d7f5d3SJohn Marino };
8386d7f5d3SJohn Marino 
8486d7f5d3SJohn Marino /* FIXME Convert this at runtime */
8586d7f5d3SJohn Marino #define FMTT_MAGIC "\040\114\126\115\062\040\170\133\065\101\045\162\060\116\052\076"
8686d7f5d3SJohn Marino #define FMTT_VERSION 1
8786d7f5d3SJohn Marino #define MDA_HEADER_SIZE 512
8886d7f5d3SJohn Marino #define LVM2_LABEL "LVM2 001"
8986d7f5d3SJohn Marino #define MDA_SIZE_MIN (8 * (unsigned) lvm_getpagesize())
9086d7f5d3SJohn Marino 
9186d7f5d3SJohn Marino #endif
92