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/*
* Copyright (C) 2001 Sistina Software (UK) Limited.
*
* This file is released under the GPL.
*/
#ifndef DISK_REP_FORMAT1_H
#define DISK_REP_FORMAT1_H
#include "lvm-types.h"
#include "metadata.h"
#include "pool.h"
#define SECTOR_SIZE 512
#define MAX_PV 256
#define MAX_LV 256
#define MAX_VG 99
#define MAX_PV_SIZE ((uint32_t) -1) /* 2TB in sectors - 1 */
#define MIN_PE_SIZE (8192L / SECTOR_SIZE) /* 8 KB in sectors */
#define MAX_PE_SIZE (16L * 1024L * 1024L / SECTOR_SIZE * 1024)
#define PE_SIZE_PV_SIZE_REL 5 /* PV size must be at least 5 times PE size */
#define MAX_LE_TOTAL 65534 /* 2^16 - 2 */
#define MAX_PE_TOTAL ((uint32_t) -2)
#define UNMAPPED_EXTENT 0
/* volume group */
#define VG_ACTIVE 0x01 /* vg_status */
#define VG_EXPORTED 0x02 /* " */
#define VG_EXTENDABLE 0x04 /* " */
#define VG_READ 0x01 /* vg_access */
#define VG_WRITE 0x02 /* " */
#define VG_CLUSTERED 0x04 /* " */
#define VG_SHARED 0x08 /* " */
/* logical volume */
#define LV_ACTIVE 0x01 /* lv_status */
#define LV_SPINDOWN 0x02 /* " */
#define LV_PERSISTENT_MINOR 0x04 /* " */
#define LV_READ 0x01 /* lv_access */
#define LV_WRITE 0x02 /* " */
#define LV_SNAPSHOT 0x04 /* " */
#define LV_SNAPSHOT_ORG 0x08 /* " */
#define LV_BADBLOCK_ON 0x01 /* lv_badblock */
#define LV_STRICT 0x01 /* lv_allocation */
#define LV_CONTIGUOUS 0x02 /* " */
/* physical volume */
#define PV_ACTIVE 0x01 /* pv_status */
#define PV_ALLOCATABLE 0x02 /* pv_allocatable */
#define EXPORTED_TAG "PV_EXP" /* Identifier for exported PV */
#define IMPORTED_TAG "PV_IMP" /* Identifier for imported PV */
struct data_area {
uint32_t base;
uint32_t size;
};
struct pv_disk {
uint8_t id[2];
uint16_t version; /* lvm version */
struct data_area pv_on_disk;
struct data_area vg_on_disk;
struct data_area pv_uuidlist_on_disk;
struct data_area lv_on_disk;
struct data_area pe_on_disk;
uint8_t pv_uuid[NAME_LEN];
uint8_t vg_name[NAME_LEN];
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;
/* only present on version == 2 pv's */
uint32_t pe_start;
};
struct lv_disk {
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 original */
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;
};
struct vg_disk {
uint8_t vg_uuid[ID_LEN]; /* volume group UUID */
uint8_t vg_name_dummy[NAME_LEN - ID_LEN]; /* rest of v1 VG name */
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 */
};
struct pe_disk {
uint16_t lv_num;
uint16_t le_num;
};
struct uuid_list {
struct list list;
char uuid[NAME_LEN];
};
struct lvd_list {
struct list list;
struct lv_disk lvd;
};
struct disk_list {
struct list list;
struct pool *mem;
struct device *dev;
struct pv_disk pvd;
struct vg_disk vgd;
struct list uuids;
struct list lvds;
struct pe_disk *extents;
};
/*
* Layout constants.
*/
#define METADATA_ALIGN 4096UL
#define PE_ALIGN (65536UL / SECTOR_SIZE)
#define METADATA_BASE 0UL
#define PV_SIZE 1024UL
#define VG_SIZE 4096UL
/*
* Functions to calculate layout info.
*/
int calculate_layout(struct disk_list *dl);
int calculate_extent_count(struct physical_volume *pv);
/*
* Low level io routines which read/write
* disk_lists.
*/
int read_pvd(struct device *dev, struct pv_disk *pvd);
struct disk_list *read_disk(struct device *dev, struct pool *mem,
const char *vg_name);
int read_pvs_in_vg(const char *vg_name, struct dev_filter *filter,
struct pool *mem, struct list *results);
int write_disks(struct list *pvds);
/*
* Functions to translate to between disk and in
* core structures.
*/
int import_pv(struct pool *mem, struct device *dev,
struct volume_group *vg,
struct physical_volume *pv, struct pv_disk *pvd);
int export_pv(struct pool *mem, struct volume_group *vg,
struct pv_disk *pvd, struct physical_volume *pv);
int import_vg(struct pool *mem,
struct volume_group *vg, struct disk_list *dl,
int partial);
int export_vg(struct vg_disk *vgd, struct volume_group *vg);
int import_lv(struct pool *mem, struct logical_volume *lv,
struct lv_disk *lvd);
void export_lv(struct lv_disk *lvd, struct volume_group *vg,
struct logical_volume *lv, const char *dev_dir);
int import_extents(struct pool *mem, struct volume_group *vg,
struct list *pvds);
int export_extents(struct disk_list *dl, int lv_num,
struct logical_volume *lv,
struct physical_volume *pv);
int import_pvs(struct pool *mem, struct volume_group *vg,
struct list *pvds, struct list *results, int *count);
int import_lvs(struct pool *mem, struct volume_group *vg,
struct list *pvds);
int export_lvs(struct disk_list *dl, struct volume_group *vg,
struct physical_volume *pv, const char *dev_dir);
int import_snapshots(struct pool *mem, struct volume_group *vg,
struct list *pvds);
int export_uuids(struct disk_list *dl, struct volume_group *vg);
void export_numbers(struct list *pvds, struct volume_group *vg);
void export_pv_act(struct list *pvds);
/* blech */
int get_free_vg_number(struct dev_filter *filter, const char *candidate_vg,
int *result);
int export_vg_number(struct list *pvds, const char *vg_name,
struct dev_filter *filter);
#endif
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