mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-25 01:34:38 +03:00
206 lines
5.9 KiB
C
206 lines
5.9 KiB
C
/*
|
|
* Copyright (C) 2001 Sistina Software
|
|
*
|
|
* lvm is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* lvm is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with GNU CC; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*
|
|
*/
|
|
|
|
#ifndef _LVM_V1_H_INCLUDE
|
|
#define _LVM_V1_H_INCLUDE
|
|
|
|
#ifdef __KERNEL__
|
|
#include <linux/kdev_t.h>
|
|
#include <linux/list.h>
|
|
#else
|
|
#define __KERNEL__
|
|
#include <linux/kdev_t.h>
|
|
#include <linux/list.h>
|
|
#undef __KERNEL__
|
|
#endif /* #ifndef __KERNEL__ */
|
|
|
|
#include <linux/major.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <linux/version.h>
|
|
|
|
typedef unsigned long blkoff_t;
|
|
|
|
#ifndef uint8_t
|
|
# define uint8_t unsigned char
|
|
#endif
|
|
#ifndef uint16_t
|
|
# define uint16_t unsigned short int
|
|
#endif
|
|
#ifndef uint32_t
|
|
# define uint32_t unsigned int
|
|
#endif
|
|
#ifndef uint64_t
|
|
# define uint64_t unsigned long long int
|
|
#endif
|
|
|
|
/*
|
|
* This is basically the on disk metadata layout version.
|
|
*/
|
|
#define LVM_STRUCT_VERSION 2
|
|
|
|
/*
|
|
* Limits for VGs, PVs per VG and LVs per VG. The ABS_* limit's are
|
|
* used in defining the data structures, MAX_* are the real limits
|
|
* used.
|
|
*/
|
|
#define MAX_VG 99
|
|
#define MAX_PV 256
|
|
#define MAX_LV 256 /* caused by 8 bit minor */
|
|
|
|
#define NAME_LEN 128 /* the maximum length of various names */
|
|
#define UUID_LEN 32 /* some components have unique identifiers */
|
|
|
|
|
|
/*
|
|
* A little struct to hold a sector range on a block device. Used to
|
|
* hold the location of on disk metadata
|
|
*/
|
|
typedef struct {
|
|
uint32_t base;
|
|
uint32_t size;
|
|
} lvm_disk_data_t;
|
|
|
|
|
|
/***********************************************************
|
|
* On disk representation:
|
|
*
|
|
* The beginning of each PV contains metadata, known int the Volume
|
|
* Group Data Area (VGDA). This metadata has the following structure:
|
|
*
|
|
* offset description size
|
|
* --------------- ---------------------------------- ------------
|
|
* 0 physical volume structure ~500 byte
|
|
* 1K volume group structure ~200 byte
|
|
* 6K namelist of physical volumes 128 byte each
|
|
* + n * ~300byte n logical volume structures ~300 byte each
|
|
* + m * 4byte m physical extent alloc. structs 4 byte each
|
|
* + ~ 1 PE size physical extents total * size
|
|
*
|
|
* Spaces are left between the structures for later extensions.
|
|
***********************************************************/
|
|
|
|
/*
|
|
* physical volume - disk
|
|
*/
|
|
typedef struct {
|
|
uint8_t id[2]; /* identifier */
|
|
uint16_t version; /* lvm struct version */
|
|
|
|
/* these define the locations of various bits of on disk metadata */
|
|
lvm_disk_data_t pv_on_disk; /* pv_disk_t location */
|
|
lvm_disk_data_t vg_on_disk; /* vg_disk_t location */
|
|
lvm_disk_data_t pv_uuidlist_on_disk; /* uuid list location */
|
|
lvm_disk_data_t lv_on_disk; /* lv_disk_t locations */
|
|
lvm_disk_data_t pe_on_disk; /* pe mapping table location */
|
|
|
|
uint8_t pv_uuid[NAME_LEN]; /* uuid for this PV */
|
|
uint8_t vg_name[NAME_LEN]; /* which vg it belongs to */
|
|
uint8_t system_id[NAME_LEN]; /* for vgexport/vgimport */
|
|
uint32_t pv_major;
|
|
uint32_t pv_number;
|
|
uint32_t pv_status;
|
|
uint32_t pv_allocatable;
|
|
uint32_t pv_size;
|
|
uint32_t lv_cur;
|
|
uint32_t pe_size;
|
|
uint32_t pe_total;
|
|
uint32_t pe_allocated;
|
|
|
|
/* data_location.base holds the start of the pe's in sectors */
|
|
uint32_t pe_start;
|
|
} pv_disk_t;
|
|
|
|
/*
|
|
* logical volume - disk
|
|
*/
|
|
typedef struct {
|
|
uint8_t lv_name[NAME_LEN];
|
|
uint8_t vg_name[NAME_LEN];
|
|
uint32_t lv_access;
|
|
uint32_t lv_status;
|
|
uint32_t lv_open;
|
|
uint32_t lv_dev;
|
|
uint32_t lv_number;
|
|
uint32_t lv_mirror_copies; /* for future use */
|
|
uint32_t lv_recovery; /* " */
|
|
uint32_t lv_schedule; /* " */
|
|
uint32_t lv_size;
|
|
uint32_t lv_snapshot_minor; /* minor number of origin */
|
|
uint16_t lv_chunk_size; /* chunk size of snapshot */
|
|
uint16_t dummy;
|
|
uint32_t lv_allocated_le;
|
|
uint32_t lv_stripes;
|
|
uint32_t lv_stripesize;
|
|
uint32_t lv_badblock; /* for future use */
|
|
uint32_t lv_allocation;
|
|
uint32_t lv_io_timeout; /* for future use */
|
|
uint32_t lv_read_ahead;
|
|
} lv_disk_t;
|
|
|
|
/*
|
|
* volume group - disk
|
|
*/
|
|
typedef struct {
|
|
uint8_t vg_uuid[UUID_LEN]; /* volume group UUID */
|
|
|
|
/* rest of v1 VG name */
|
|
uint8_t vg_name_dummy[NAME_LEN-UUID_LEN];
|
|
uint32_t vg_number; /* volume group number */
|
|
uint32_t vg_access; /* read/write */
|
|
uint32_t vg_status; /* active or not */
|
|
uint32_t lv_max; /* maximum logical volumes */
|
|
uint32_t lv_cur; /* current logical volumes */
|
|
uint32_t lv_open; /* open logical volumes */
|
|
uint32_t pv_max; /* maximum physical volumes */
|
|
uint32_t pv_cur; /* current physical volumes FU */
|
|
uint32_t pv_act; /* active physical volumes */
|
|
uint32_t dummy;
|
|
uint32_t vgda; /* volume group descriptor arrays FU */
|
|
uint32_t pe_size; /* physical extent size in sectors */
|
|
uint32_t pe_total; /* total of physical extents */
|
|
uint32_t pe_allocated; /* allocated physical extents */
|
|
uint32_t pvg_total; /* physical volume groups FU */
|
|
} vg_disk_t;
|
|
|
|
/*
|
|
* pe mapping - disk
|
|
*/
|
|
typedef struct {
|
|
uint16_t lv_num;
|
|
uint16_t le_num;
|
|
} pe_disk_t;
|
|
|
|
/*
|
|
* copy on write tables - disk
|
|
*/
|
|
typedef struct lv_COW_table_disk_v1 {
|
|
uint64_t pv_org_number;
|
|
uint64_t pv_org_rsector;
|
|
uint64_t pv_snap_number;
|
|
uint64_t pv_snap_rsector;
|
|
} lv_COW_table_disk_t;
|
|
|
|
|
|
|
|
#endif
|
|
|