mirror of
git://sourceware.org/git/lvm2.git
synced 2024-10-28 20:25:52 +03:00
109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/*
|
|
* 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"
|
|
|
|
/* disk_locn and data_area_list are defined in format-text.h */
|
|
|
|
#define PV_HEADER_EXTENSION_VSN 1
|
|
|
|
struct pv_header_extension {
|
|
uint32_t version;
|
|
uint32_t flags;
|
|
/* NULL-terminated list of bootloader areas */
|
|
struct disk_locn bootloader_areas_xl[0];
|
|
} __attribute__ ((packed));
|
|
|
|
/* 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
|