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/*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _LVM_TEXT_LAYOUT_H
#define _LVM_TEXT_LAYOUT_H
#include "config.h"
#include "lvm-types.h"
#include "metadata.h"
#include "uuid.h"
/* On disk */
struct disk_locn {
uint64_t offset; /* Offset in bytes to start sector */
uint64_t size; /* Bytes */
} __attribute__ ((packed));
/* Data areas (holding PEs) */
struct data_area_list {
struct dm_list list;
struct disk_locn disk_locn;
};
/* Fields with the suffix _xl should be xlate'd wherever they appear */
/* On disk */
struct pv_header {
int8_t pv_uuid[ID_LEN];
/* This size can be overridden if PV belongs to a VG */
uint64_t device_size_xl; /* Bytes */
/* NULL-terminated list of data areas followed by */
/* NULL-terminated list of metadata area headers */
struct disk_locn disk_areas_xl[0]; /* Two lists */
} __attribute__ ((packed));
/*
* Ignore this raw location. This allows us to
* ignored metadata areas easily, and thus balance
* metadata across VGs with many PVs.
*/
#define RAW_LOCN_IGNORED 0x00000001
/* On disk */
struct raw_locn {
uint64_t offset; /* Offset in bytes to start sector */
uint64_t size; /* Bytes */
uint32_t checksum;
uint32_t flags;
} __attribute__ ((packed));
int rlocn_is_ignored(const struct raw_locn *rlocn);
void rlocn_set_ignored(struct raw_locn *rlocn, unsigned mda_ignored);
/* On disk */
/* Structure size limited to one sector */
struct mda_header {
uint32_t checksum_xl; /* Checksum of rest of mda_header */
int8_t magic[16]; /* To aid scans for metadata */
uint32_t version;
uint64_t start; /* Absolute start byte of mda_header */
uint64_t size; /* Size of metadata area */
struct raw_locn raw_locns[0]; /* NULL-terminated list */
} __attribute__ ((packed));
struct mda_header *raw_read_mda_header(const struct format_type *fmt,
struct device_area *dev_area);
struct mda_lists {
struct dm_list dirs;
struct dm_list raws;
struct metadata_area_ops *file_ops;
struct metadata_area_ops *raw_ops;
};
struct mda_context {
struct device_area area;
uint64_t free_sectors;
struct raw_locn rlocn; /* Store inbetween write and commit */
};
/* FIXME Convert this at runtime */
#define FMTT_MAGIC "\040\114\126\115\062\040\170\133\065\101\045\162\060\116\052\076"
#define FMTT_VERSION 1
#define MDA_HEADER_SIZE 512
#define LVM2_LABEL "LVM2 001"
#define MDA_SIZE_MIN (8 * (unsigned) lvm_getpagesize())
const char *vgname_from_mda(const struct format_type *fmt,
struct mda_header *mdah,
struct device_area *dev_area, struct id *vgid,
uint64_t *vgstatus, char **creation_host,
uint64_t *mda_free_sectors);
#endif
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