mirror of
git://sourceware.org/git/lvm2.git
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169 lines
3.9 KiB
C
169 lines
3.9 KiB
C
/*
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* Copyright (C) 2001 Sistina Software
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*
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* This file is released under the GPL.
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*
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* This is the in core representation of a volume group and its
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* associated physical and logical volumes.
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*/
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#ifndef _LVM_METADATA_H
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#define _LVM_METADATA_H
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#include <sys/types.h>
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#include "dev-cache.h"
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#include "list.h"
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#define ID_LEN 32
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#define NAME_LEN 128
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/* Various flags */
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/* Note that the bits no longer necessarily correspond to LVM1 disk format */
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#define STATUS_ACTIVE 0x01 /* PV VG LV */
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#define STATUS_EXPORTED 0x02 /* VG */
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#define STATUS_EXTENDABLE 0x04 /* VG */
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#define STATUS_ALLOCATED 0x02 /* PV */
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#define STATUS_SPINDOWN 0x02 /* LV */
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#define STATUS_BADBLOCK_ON 0x04 /* LV */
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#define STATUS_ALLOC_STRICT 0x08 /* LV */
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#define STATUS_ALLOC_CONTIGUOUS 0x10 /* LV */
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#define ACCESS_READ 0x01 /* LV VG */
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#define ACCESS_WRITE 0x02 /* LV VG */
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#define ACCESS_SNAPSHOT 0x04 /* LV */
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#define ACCESS_SNAPSHOT_ORG 0x08 /* LV */
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#define ACCESS_CLUSTERED 0x04 /* VG */
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#define ACCESS_SHARED 0x08 /* VG */
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#define EXPORTED_TAG "PV_EXP" /* Identifier of exported PV */
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#define IMPORTED_TAG "PV_IMP" /* Identifier of imported PV */
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struct id {
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__uint8_t uuid[ID_LEN];
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};
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struct physical_volume {
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struct id *id;
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struct device *dev;
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char *vg_name;
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char *exported;
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__uint32_t status;
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__uint64_t size;
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/* physical extents */
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__uint64_t pe_size;
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__uint64_t pe_start;
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__uint32_t pe_count;
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__uint32_t pe_allocated;
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};
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struct pe_specifier {
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struct physical_volume *pv;
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__uint32_t pe;
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};
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struct logical_volume {
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/* disk */
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struct id *id;
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char *name;
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__uint32_t access;
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__uint32_t status;
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__uint32_t open;
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__uint64_t size;
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__uint32_t le_count;
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/* le -> pe mapping array */
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struct pe_specifier *map;
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};
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struct volume_group {
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struct id *id;
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char *name;
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__uint32_t status;
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__uint32_t access;
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__uint64_t extent_size;
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__uint32_t extent_count;
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__uint32_t free_count;
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/* physical volumes */
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__uint32_t pv_count;
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struct physical_volume **pv;
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/* logical volumes */
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__uint32_t lv_count;
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struct logical_volume **lv;
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};
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struct string_list {
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struct list_head list;
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char * string;
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};
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struct pv_list {
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struct list_head list;
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struct physical_volume pv;
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};
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/* ownership of returned objects passes */
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struct io_space {
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struct string_list *(*get_vgs)(struct io_space *is);
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struct pv_list *(*get_pvs)(struct io_space *is);
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struct physical_volume *(*pv_read)(struct io_space *is,
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struct device *dev);
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int (*pv_write)(struct io_space *is, struct physical_volume *pv);
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struct volume_group *(*vg_read)(struct io_space *is,
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const char *vg_name);
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int (*vg_write)(struct io_space *is, struct volume_group *vg);
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void (*destroy)(struct io_space *is);
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struct dev_filter *filter;
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void *private;
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};
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/* FIXME: Move to other files */
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struct io_space *create_text_format(struct dev_filter *filter,
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const char *text_file);
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struct io_space *create_lvm_v1_format(struct dev_filter *filter);
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inline int write_backup(struct io_space *orig, struct io_space *text)
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{
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}
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int id_eq(struct id *op1, struct id *op2);
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struct volume_group *vg_create();
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struct physical_volume *pv_create();
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int vg_destroy(struct volume_group *vg);
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int pv_add(struct volume_group *vg, struct physical_volume *pv);
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int pv_remove(struct volume_group *vg, struct physical_volume *pv);
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struct physical_volume *pv_find(struct volume_group *vg,
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const char *pv_name);
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int lv_add(struct volume_group *vg, struct logical_volume *lv);
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int lv_remove(struct volume_group *vg, struct logical_volume *lv);
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struct logical_volume *lv_find(struct volume_group *vg,
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const char *lv_name);
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#endif
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