mirror of
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251 lines
7.8 KiB
C
251 lines
7.8 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef DISK_REP_FORMAT1_H
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#define DISK_REP_FORMAT1_H
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#include "lvm-types.h"
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#include "metadata.h"
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#include "toolcontext.h"
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#define MAX_PV 256
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#define MAX_LV 256
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#define MAX_VG 99
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#define LVM_BLK_MAJOR 58
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#define MAX_PV_SIZE ((uint32_t) -1) /* 2TB in sectors - 1 */
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#define MIN_PE_SIZE (8192L >> SECTOR_SHIFT) /* 8 KB in sectors */
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#define MAX_PE_SIZE (16L * 1024L * (1024L >> SECTOR_SHIFT) * 1024L)
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#define PE_SIZE_PV_SIZE_REL 5 /* PV size must be at least 5 times PE size */
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#define MAX_LE_TOTAL 65534 /* 2^16 - 2 */
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#define MAX_PE_TOTAL ((uint32_t) -2)
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#define UNMAPPED_EXTENT 0
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/* volume group */
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#define VG_ACTIVE 0x01 /* vg_status */
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#define VG_EXPORTED 0x02 /* " */
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#define VG_EXTENDABLE 0x04 /* " */
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#define VG_READ 0x01 /* vg_access */
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#define VG_WRITE 0x02 /* " */
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#define VG_CLUSTERED 0x04 /* " */
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#define VG_SHARED 0x08 /* " */
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/* logical volume */
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#define LV_ACTIVE 0x01 /* lv_status */
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#define LV_SPINDOWN 0x02 /* " */
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#define LV_PERSISTENT_MINOR 0x04 /* " */
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#define LV_READ 0x01 /* lv_access */
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#define LV_WRITE 0x02 /* " */
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#define LV_SNAPSHOT 0x04 /* " */
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#define LV_SNAPSHOT_ORG 0x08 /* " */
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#define LV_BADBLOCK_ON 0x01 /* lv_badblock */
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#define LV_STRICT 0x01 /* lv_allocation */
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#define LV_CONTIGUOUS 0x02 /* " */
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/* physical volume */
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#define PV_ACTIVE 0x01 /* pv_status */
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#define PV_ALLOCATABLE 0x02 /* pv_allocatable */
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#define EXPORTED_TAG "PV_EXP" /* Identifier for exported PV */
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#define IMPORTED_TAG "PV_IMP" /* Identifier for imported PV */
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struct data_area {
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uint32_t base;
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uint32_t size;
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} __attribute__ ((packed));
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struct pv_disk {
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int8_t id[2];
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uint16_t version; /* lvm version */
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struct data_area pv_on_disk;
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struct data_area vg_on_disk;
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struct data_area pv_uuidlist_on_disk;
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struct data_area lv_on_disk;
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struct data_area pe_on_disk;
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int8_t pv_uuid[NAME_LEN];
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int8_t vg_name[NAME_LEN];
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int8_t system_id[NAME_LEN]; /* for vgexport/vgimport */
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uint32_t pv_major;
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uint32_t pv_number;
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uint32_t pv_status;
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uint32_t pv_allocatable;
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uint32_t pv_size;
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uint32_t lv_cur;
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uint32_t pe_size;
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uint32_t pe_total;
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uint32_t pe_allocated;
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/* only present on version == 2 pv's */
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uint32_t pe_start;
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} __attribute__ ((packed));
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struct lv_disk {
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int8_t lv_name[NAME_LEN];
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int8_t vg_name[NAME_LEN];
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uint32_t lv_access;
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uint32_t lv_status;
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uint32_t lv_open;
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uint32_t lv_dev;
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uint32_t lv_number;
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uint32_t lv_mirror_copies; /* for future use */
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uint32_t lv_recovery; /* " */
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uint32_t lv_schedule; /* " */
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uint32_t lv_size;
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uint32_t lv_snapshot_minor; /* minor number of original */
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uint16_t lv_chunk_size; /* chunk size of snapshot */
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uint16_t dummy;
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uint32_t lv_allocated_le;
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uint32_t lv_stripes;
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uint32_t lv_stripesize;
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uint32_t lv_badblock; /* for future use */
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uint32_t lv_allocation;
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uint32_t lv_io_timeout; /* for future use */
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uint32_t lv_read_ahead;
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} __attribute__ ((packed));
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struct vg_disk {
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int8_t vg_uuid[ID_LEN]; /* volume group UUID */
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int8_t vg_name_dummy[NAME_LEN - ID_LEN]; /* rest of v1 VG name */
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uint32_t vg_number; /* volume group number */
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uint32_t vg_access; /* read/write */
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uint32_t vg_status; /* active or not */
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uint32_t lv_max; /* maximum logical volumes */
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uint32_t lv_cur; /* current logical volumes */
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uint32_t lv_open; /* open logical volumes */
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uint32_t pv_max; /* maximum physical volumes */
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uint32_t pv_cur; /* current physical volumes FU */
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uint32_t pv_act; /* active physical volumes */
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uint32_t dummy;
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uint32_t vgda; /* volume group descriptor arrays FU */
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uint32_t pe_size; /* physical extent size in sectors */
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uint32_t pe_total; /* total of physical extents */
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uint32_t pe_allocated; /* allocated physical extents */
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uint32_t pvg_total; /* physical volume groups FU */
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} __attribute__ ((packed));
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struct pe_disk {
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uint16_t lv_num;
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uint16_t le_num;
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} __attribute__ ((packed));
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struct uuid_list {
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struct dm_list list;
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char uuid[NAME_LEN] __attribute__((aligned(8)));
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};
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struct lvd_list {
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struct dm_list list;
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struct lv_disk lvd;
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};
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struct disk_list {
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struct dm_list list;
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struct dm_pool *mem;
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struct device *dev;
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struct pv_disk pvd __attribute__((aligned(8)));
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struct vg_disk vgd __attribute__((aligned(8)));
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struct dm_list uuids __attribute__((aligned(8)));
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struct dm_list lvds __attribute__((aligned(8)));
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struct pe_disk *extents __attribute__((aligned(8)));
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};
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/*
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* Layout constants.
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*/
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#define METADATA_ALIGN 4096UL
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#define LVM1_PE_ALIGN (65536UL >> SECTOR_SHIFT) /* PE alignment */
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#define METADATA_BASE 0UL
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#define PV_SIZE 1024UL
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#define VG_SIZE 4096UL
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/*
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* Functions to calculate layout info.
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*/
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int calculate_layout(struct disk_list *dl);
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int calculate_extent_count(struct physical_volume *pv, uint32_t extent_size,
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uint32_t max_extent_count, uint64_t pe_start);
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/*
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* Low level io routines which read/write
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* disk_lists.
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*/
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struct disk_list *read_disk(const struct format_type *fmt, struct device *dev,
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struct dm_pool *mem, const char *vg_name);
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int read_pvs_in_vg(const struct format_type *fmt, const char *vg_name,
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struct dev_filter *filter,
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struct dm_pool *mem, struct dm_list *results);
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int write_disks(const struct format_type *fmt, struct dm_list *pvds);
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/*
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* Functions to translate to between disk and in
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* core structures.
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*/
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int import_pv(const struct format_type *fmt, struct dm_pool *mem,
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struct device *dev, struct volume_group *vg,
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struct physical_volume *pv, struct pv_disk *pvd,
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struct vg_disk *vgd);
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int export_pv(struct cmd_context *cmd, struct dm_pool *mem,
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struct volume_group *vg,
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struct pv_disk *pvd, struct physical_volume *pv);
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int import_vg(struct dm_pool *mem,
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struct volume_group *vg, struct disk_list *dl);
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int export_vg(struct vg_disk *vgd, struct volume_group *vg);
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int import_lv(struct cmd_context *cmd, struct dm_pool *mem,
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struct logical_volume *lv, struct lv_disk *lvd);
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int import_extents(struct cmd_context *cmd, struct volume_group *vg,
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struct dm_list *pvds);
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int export_extents(struct disk_list *dl, uint32_t lv_num,
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struct logical_volume *lv, struct physical_volume *pv);
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int import_pvs(const struct format_type *fmt, struct dm_pool *mem,
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struct volume_group *vg, struct dm_list *pvds);
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int import_lvs(struct dm_pool *mem, struct volume_group *vg, struct dm_list *pvds);
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int export_lvs(struct disk_list *dl, struct volume_group *vg,
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struct physical_volume *pv, const char *dev_dir);
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int import_snapshots(struct dm_pool *mem, struct volume_group *vg,
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struct dm_list *pvds);
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int export_uuids(struct disk_list *dl, struct volume_group *vg);
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void export_numbers(struct dm_list *pvds, struct volume_group *vg);
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void export_pv_act(struct dm_list *pvds);
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int munge_pvd(struct device *dev, struct pv_disk *pvd);
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int read_vgd(struct device *dev, struct vg_disk *vgd, struct pv_disk *pvd);
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/* blech */
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int get_free_vg_number(struct format_instance *fid, struct dev_filter *filter,
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const char *candidate_vg, int *result);
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int export_vg_number(struct format_instance *fid, struct dm_list *pvds,
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const char *vg_name, struct dev_filter *filter);
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#endif
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