mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-22 17:35:59 +03:00
487 lines
14 KiB
C
487 lines
14 KiB
C
/*
|
|
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
|
|
* Copyright (C) 2004-2007 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
|
|
*/
|
|
|
|
/*
|
|
* This is the representation of LVM metadata that is being adapted
|
|
* for library export.
|
|
*/
|
|
|
|
#ifndef _LVM_METADATA_EXPORTED_H
|
|
#define _LVM_METADATA_EXPORTED_H
|
|
|
|
#include "uuid.h"
|
|
|
|
struct physical_volume;
|
|
typedef struct physical_volume pv_t;
|
|
struct volume_group;
|
|
typedef struct volume_group vg_t;
|
|
|
|
struct logical_volume;
|
|
|
|
struct lv_segment;
|
|
struct pv_segment;
|
|
|
|
#define MAX_STRIPES 128U
|
|
#define SECTOR_SHIFT 9L
|
|
#define STRIPE_SIZE_MIN ( (unsigned) lvm_getpagesize() >> SECTOR_SHIFT) /* PAGESIZE in sectors */
|
|
#define STRIPE_SIZE_MAX ( 512L * 1024L >> SECTOR_SHIFT) /* 512 KB in sectors */
|
|
#define STRIPE_SIZE_LIMIT ((UINT_MAX >> 2) + 1)
|
|
#define PV_MIN_SIZE ( 512L * 1024L >> SECTOR_SHIFT) /* 512 KB in sectors */
|
|
#define MAX_RESTRICTED_LVS 255 /* Used by FMT_RESTRICTED_LVIDS */
|
|
|
|
/* Various flags */
|
|
/* Note that the bits no longer necessarily correspond to LVM1 disk format */
|
|
|
|
#define PARTIAL_VG 0x00000001U /* VG */
|
|
#define EXPORTED_VG 0x00000002U /* VG PV */
|
|
#define RESIZEABLE_VG 0x00000004U /* VG */
|
|
|
|
/* May any free extents on this PV be used or must they be left free? */
|
|
#define ALLOCATABLE_PV 0x00000008U /* PV */
|
|
|
|
//#define SPINDOWN_LV 0x00000010U /* LV */
|
|
//#define BADBLOCK_ON 0x00000020U /* LV */
|
|
#define VISIBLE_LV 0x00000040U /* LV */
|
|
#define FIXED_MINOR 0x00000080U /* LV */
|
|
/* FIXME Remove when metadata restructuring is completed */
|
|
#define SNAPSHOT 0x00001000U /* LV - internal use only */
|
|
#define PVMOVE 0x00002000U /* VG LV SEG */
|
|
#define LOCKED 0x00004000U /* LV */
|
|
#define MIRRORED 0x00008000U /* LV - internal use only */
|
|
//#define VIRTUAL 0x00010000U /* LV - internal use only */
|
|
#define MIRROR_LOG 0x00020000U /* LV */
|
|
#define MIRROR_IMAGE 0x00040000U /* LV */
|
|
#define MIRROR_NOTSYNCED 0x00080000U /* LV */
|
|
//#define ACTIVATE_EXCL 0x00100000U /* LV - internal use only */
|
|
//#define PRECOMMITTED 0x00200000U /* VG - internal use only */
|
|
|
|
#define LVM_READ 0x00000100U /* LV VG */
|
|
#define LVM_WRITE 0x00000200U /* LV VG */
|
|
#define CLUSTERED 0x00000400U /* VG */
|
|
//#define SHARED 0x00000800U /* VG */
|
|
|
|
/* Format features flags */
|
|
#define FMT_SEGMENTS 0x00000001U /* Arbitrary segment params? */
|
|
#define FMT_MDAS 0x00000002U /* Proper metadata areas? */
|
|
#define FMT_TAGS 0x00000004U /* Tagging? */
|
|
#define FMT_UNLIMITED_VOLS 0x00000008U /* Unlimited PVs/LVs? */
|
|
#define FMT_RESTRICTED_LVIDS 0x00000010U /* LVID <= 255 */
|
|
#define FMT_ORPHAN_ALLOCATABLE 0x00000020U /* Orphan PV allocatable? */
|
|
//#define FMT_PRECOMMIT 0x00000040U /* Supports pre-commit? */
|
|
#define FMT_RESIZE_PV 0x00000080U /* Supports pvresize? */
|
|
#define FMT_UNLIMITED_STRIPESIZE 0x00000100U /* Unlimited stripe size? */
|
|
#define FMT_RESTRICTED_READAHEAD 0x00000200U /* Readahead restricted to 2-120? */
|
|
|
|
/* LVM2 external library flags */
|
|
#define CORRECT_INCONSISTENT 0x00000001U /* Correct inconsistent metadata */
|
|
#define FAIL_INCONSISTENT 0x00000002U /* Fail if metadata inconsistent */
|
|
|
|
/* Ordered list - see lv_manip.c */
|
|
typedef enum {
|
|
ALLOC_INVALID,
|
|
ALLOC_CONTIGUOUS,
|
|
ALLOC_CLING,
|
|
ALLOC_NORMAL,
|
|
ALLOC_ANYWHERE,
|
|
ALLOC_INHERIT
|
|
} alloc_policy_t;
|
|
|
|
typedef enum {
|
|
AREA_UNASSIGNED,
|
|
AREA_PV,
|
|
AREA_LV
|
|
} area_type_t;
|
|
|
|
/*
|
|
* Whether or not to force an operation.
|
|
*/
|
|
typedef enum {
|
|
PROMPT = 0, /* Issue yes/no prompt to confirm operation */
|
|
DONT_PROMPT = 1, /* Skip yes/no prompt */
|
|
DONT_PROMPT_OVERRIDE = 2 /* Skip prompt + override a second condition */
|
|
} force_t;
|
|
|
|
struct cmd_context;
|
|
struct format_handler;
|
|
struct labeller;
|
|
|
|
struct format_type {
|
|
struct list list;
|
|
struct cmd_context *cmd;
|
|
struct format_handler *ops;
|
|
struct labeller *labeller;
|
|
const char *name;
|
|
const char *alias;
|
|
uint32_t features;
|
|
void *library;
|
|
void *private;
|
|
};
|
|
|
|
struct pv_segment {
|
|
struct list list; /* Member of pv->segments: ordered list
|
|
* covering entire data area on this PV */
|
|
|
|
struct physical_volume *pv;
|
|
uint32_t pe;
|
|
uint32_t len;
|
|
|
|
struct lv_segment *lvseg; /* NULL if free space */
|
|
uint32_t lv_area; /* Index to area in LV segment */
|
|
};
|
|
|
|
struct physical_volume {
|
|
struct id id;
|
|
struct device *dev;
|
|
const struct format_type *fmt;
|
|
const char *vg_name;
|
|
struct id vgid;
|
|
|
|
uint32_t status;
|
|
uint64_t size;
|
|
|
|
/* physical extents */
|
|
uint32_t pe_size;
|
|
uint64_t pe_start;
|
|
uint32_t pe_count;
|
|
uint32_t pe_alloc_count;
|
|
|
|
struct list segments; /* Ordered pv_segments covering complete PV */
|
|
struct list tags;
|
|
};
|
|
|
|
struct format_instance {
|
|
const struct format_type *fmt;
|
|
struct list metadata_areas; /* e.g. metadata locations */
|
|
void *private;
|
|
};
|
|
|
|
struct volume_group {
|
|
struct cmd_context *cmd;
|
|
struct format_instance *fid;
|
|
uint32_t seqno; /* Metadata sequence number */
|
|
|
|
struct id id;
|
|
char *name;
|
|
char *system_id;
|
|
|
|
uint32_t status;
|
|
alloc_policy_t alloc;
|
|
|
|
uint32_t extent_size;
|
|
uint32_t extent_count;
|
|
uint32_t free_count;
|
|
|
|
uint32_t max_lv;
|
|
uint32_t max_pv;
|
|
|
|
/* physical volumes */
|
|
uint32_t pv_count;
|
|
struct list pvs;
|
|
|
|
/* logical volumes */
|
|
uint32_t lv_count;
|
|
uint32_t snapshot_count;
|
|
struct list lvs;
|
|
|
|
struct list tags;
|
|
};
|
|
|
|
/* There will be one area for each stripe */
|
|
struct lv_segment_area {
|
|
area_type_t type;
|
|
union {
|
|
struct {
|
|
struct pv_segment *pvseg;
|
|
} pv;
|
|
struct {
|
|
struct logical_volume *lv;
|
|
uint32_t le;
|
|
} lv;
|
|
} u;
|
|
};
|
|
|
|
struct segment_type;
|
|
struct lv_segment {
|
|
struct list list;
|
|
struct logical_volume *lv;
|
|
|
|
const struct segment_type *segtype;
|
|
uint32_t le;
|
|
uint32_t len;
|
|
|
|
uint32_t status;
|
|
|
|
/* FIXME Fields depend on segment type */
|
|
uint32_t stripe_size;
|
|
uint32_t area_count;
|
|
uint32_t area_len;
|
|
struct logical_volume *origin;
|
|
struct logical_volume *cow;
|
|
struct list origin_list;
|
|
uint32_t chunk_size; /* For snapshots - in sectors */
|
|
uint32_t region_size; /* For mirrors - in sectors */
|
|
uint32_t extents_copied;
|
|
struct logical_volume *log_lv;
|
|
struct lv_segment *mirror_seg;
|
|
|
|
struct list tags;
|
|
|
|
struct lv_segment_area *areas;
|
|
};
|
|
|
|
#define seg_type(seg, s) (seg)->areas[(s)].type
|
|
#define seg_pv(seg, s) (seg)->areas[(s)].u.pv.pvseg->pv
|
|
#define seg_lv(seg, s) (seg)->areas[(s)].u.lv.lv
|
|
|
|
struct logical_volume {
|
|
union lvid lvid;
|
|
char *name;
|
|
|
|
struct volume_group *vg;
|
|
|
|
uint32_t status;
|
|
alloc_policy_t alloc;
|
|
uint32_t read_ahead;
|
|
int32_t major;
|
|
int32_t minor;
|
|
|
|
uint64_t size; /* Sectors */
|
|
uint32_t le_count;
|
|
|
|
uint32_t origin_count;
|
|
struct list snapshot_segs;
|
|
struct lv_segment *snapshot;
|
|
|
|
struct list segments;
|
|
struct list tags;
|
|
};
|
|
|
|
struct pe_range {
|
|
struct list list;
|
|
uint32_t start; /* PEs */
|
|
uint32_t count; /* PEs */
|
|
};
|
|
|
|
struct pv_list {
|
|
struct list list;
|
|
struct physical_volume *pv;
|
|
struct list *mdas; /* Metadata areas */
|
|
struct list *pe_ranges; /* Ranges of PEs e.g. for allocation */
|
|
};
|
|
|
|
struct lv_list {
|
|
struct list list;
|
|
struct logical_volume *lv;
|
|
};
|
|
|
|
/*
|
|
* Utility functions
|
|
*/
|
|
int vg_write(struct volume_group *vg);
|
|
int vg_commit(struct volume_group *vg);
|
|
int vg_revert(struct volume_group *vg);
|
|
struct volume_group *vg_read(struct cmd_context *cmd, const char *vg_name,
|
|
const char *vgid, int *consistent);
|
|
struct physical_volume *pv_read(struct cmd_context *cmd, const char *pv_name,
|
|
struct list *mdas, uint64_t *label_sector,
|
|
int warnings);
|
|
struct list *get_pvs(struct cmd_context *cmd);
|
|
|
|
/* Set full_scan to 1 to re-read every (filtered) device label */
|
|
struct list *get_vgs(struct cmd_context *cmd, int full_scan);
|
|
struct list *get_vgids(struct cmd_context *cmd, int full_scan);
|
|
|
|
int pv_write(struct cmd_context *cmd, struct physical_volume *pv,
|
|
struct list *mdas, int64_t label_sector);
|
|
int is_orphan_vg(const char *vg_name);
|
|
int is_orphan(pv_t *pv);
|
|
vg_t *vg_lock_and_read(struct cmd_context *cmd, const char *vg_name,
|
|
const char *vgid,
|
|
uint32_t lock_flags, uint32_t status_flags,
|
|
uint32_t misc_flags);
|
|
|
|
/* pe_start and pe_end relate to any existing data so that new metadata
|
|
* areas can avoid overlap */
|
|
pv_t *pv_create(const struct format_type *fmt,
|
|
struct device *dev,
|
|
struct id *id,
|
|
uint64_t size,
|
|
uint64_t pe_start,
|
|
uint32_t existing_extent_count,
|
|
uint32_t existing_extent_size,
|
|
int pvmetadatacopies,
|
|
uint64_t pvmetadatasize, struct list *mdas);
|
|
int pv_resize(struct physical_volume *pv, struct volume_group *vg,
|
|
uint32_t new_pe_count);
|
|
int pv_resize_single(struct cmd_context *cmd,
|
|
struct volume_group *vg,
|
|
struct physical_volume *pv,
|
|
uint64_t new_size);
|
|
int pv_analyze(struct cmd_context *cmd, const char *pv_name,
|
|
uint64_t label_sector);
|
|
|
|
/* FIXME: move internal to library */
|
|
uint32_t pv_list_extents_free(const struct list *pvh);
|
|
|
|
struct volume_group *vg_create(struct cmd_context *cmd, const char *name,
|
|
uint32_t extent_size, uint32_t max_pv,
|
|
uint32_t max_lv, alloc_policy_t alloc,
|
|
int pv_count, char **pv_names);
|
|
int vg_remove(struct volume_group *vg);
|
|
int vg_remove_single(struct cmd_context *cmd, const char *vg_name,
|
|
struct volume_group *vg, int consistent,
|
|
force_t force);
|
|
int vg_rename(struct cmd_context *cmd, struct volume_group *vg,
|
|
const char *new_name);
|
|
int vg_extend(struct volume_group *vg, int pv_count, char **pv_names);
|
|
int vg_change_pesize(struct cmd_context *cmd, struct volume_group *vg,
|
|
uint32_t new_extent_size);
|
|
int vg_split_mdas(struct cmd_context *cmd, struct volume_group *vg_from,
|
|
struct volume_group *vg_to);
|
|
|
|
/* Manipulate LVs */
|
|
struct logical_volume *lv_create_empty(const char *name,
|
|
union lvid *lvid,
|
|
uint32_t status,
|
|
alloc_policy_t alloc,
|
|
int import,
|
|
struct volume_group *vg);
|
|
|
|
/* Reduce the size of an LV by extents */
|
|
int lv_reduce(struct logical_volume *lv, uint32_t extents);
|
|
|
|
/* Empty an LV prior to deleting it */
|
|
int lv_empty(struct logical_volume *lv);
|
|
|
|
/* Entry point for all LV extent allocations */
|
|
int lv_extend(struct logical_volume *lv,
|
|
const struct segment_type *segtype,
|
|
uint32_t stripes, uint32_t stripe_size,
|
|
uint32_t mirrors, uint32_t extents,
|
|
struct physical_volume *mirrored_pv, uint32_t mirrored_pe,
|
|
uint32_t status, struct list *allocatable_pvs,
|
|
alloc_policy_t alloc);
|
|
|
|
/* lv must be part of lv->vg->lvs */
|
|
int lv_remove(struct logical_volume *lv);
|
|
|
|
int lv_remove_single(struct cmd_context *cmd, struct logical_volume *lv,
|
|
force_t force);
|
|
|
|
int lv_rename(struct cmd_context *cmd, struct logical_volume *lv,
|
|
const char *new_name);
|
|
|
|
/* Find a PV within a given VG */
|
|
struct pv_list *find_pv_in_vg(struct volume_group *vg, const char *pv_name);
|
|
pv_t *find_pv_in_vg_by_uuid(struct volume_group *vg, struct id *id);
|
|
|
|
/* Find an LV within a given VG */
|
|
struct lv_list *find_lv_in_vg(struct volume_group *vg, const char *lv_name);
|
|
|
|
/* FIXME Merge these functions with ones above */
|
|
struct logical_volume *find_lv(struct volume_group *vg, const char *lv_name);
|
|
struct physical_volume *find_pv_by_name(struct cmd_context *cmd,
|
|
const char *pv_name);
|
|
|
|
/* Find LV segment containing given LE */
|
|
struct lv_segment *first_seg(struct logical_volume *lv);
|
|
|
|
|
|
/*
|
|
* Useful functions for managing snapshots.
|
|
*/
|
|
int lv_is_origin(const struct logical_volume *lv);
|
|
int lv_is_cow(const struct logical_volume *lv);
|
|
int lv_is_visible(const struct logical_volume *lv);
|
|
|
|
int pv_is_in_vg(struct volume_group *vg, struct physical_volume *pv);
|
|
|
|
/* Given a cow LV, return return the snapshot lv_segment that uses it */
|
|
struct lv_segment *find_cow(const struct logical_volume *lv);
|
|
|
|
/* Given a cow LV, return its origin */
|
|
struct logical_volume *origin_from_cow(const struct logical_volume *lv);
|
|
|
|
int vg_add_snapshot(const char *name,
|
|
struct logical_volume *origin, struct logical_volume *cow,
|
|
union lvid *lvid, uint32_t extent_count,
|
|
uint32_t chunk_size);
|
|
|
|
int vg_remove_snapshot(struct logical_volume *cow);
|
|
|
|
int vg_check_status(const struct volume_group *vg, uint32_t status);
|
|
|
|
/*
|
|
* Mirroring functions
|
|
*/
|
|
struct alloc_handle;
|
|
uint32_t adjusted_mirror_region_size(uint32_t extent_size, uint32_t extents,
|
|
uint32_t region_size);
|
|
int create_mirror_layers(struct alloc_handle *ah,
|
|
uint32_t first_area,
|
|
uint32_t num_mirrors,
|
|
struct logical_volume *lv,
|
|
const struct segment_type *segtype,
|
|
uint32_t status,
|
|
uint32_t region_size,
|
|
struct logical_volume *log_lv);
|
|
|
|
int remove_mirror_images(struct lv_segment *mirrored_seg, uint32_t num_mirrors,
|
|
struct list *removable_pvs, unsigned remove_log);
|
|
int reconfigure_mirror_images(struct lv_segment *mirrored_seg, uint32_t num_mirrors,
|
|
struct list *removable_pvs, unsigned remove_log);
|
|
|
|
int insert_pvmove_mirrors(struct cmd_context *cmd,
|
|
struct logical_volume *lv_mirr,
|
|
struct list *source_pvl,
|
|
struct logical_volume *lv,
|
|
struct list *allocatable_pvs,
|
|
alloc_policy_t alloc,
|
|
struct list *lvs_changed);
|
|
int remove_pvmove_mirrors(struct volume_group *vg,
|
|
struct logical_volume *lv_mirr);
|
|
struct logical_volume *find_pvmove_lv(struct volume_group *vg,
|
|
struct device *dev, uint32_t lv_type);
|
|
struct logical_volume *find_pvmove_lv_from_pvname(struct cmd_context *cmd,
|
|
struct volume_group *vg,
|
|
const char *name,
|
|
uint32_t lv_type);
|
|
const char *get_pvmove_pvname_from_lv(struct logical_volume *lv);
|
|
const char *get_pvmove_pvname_from_lv_mirr(struct logical_volume *lv_mirr);
|
|
float copy_percent(struct logical_volume *lv_mirr);
|
|
struct list *lvs_using_lv(struct cmd_context *cmd, struct volume_group *vg,
|
|
struct logical_volume *lv);
|
|
|
|
uint32_t find_free_lvnum(struct logical_volume *lv);
|
|
char *generate_lv_name(struct volume_group *vg, const char *format,
|
|
char *buffer, size_t len);
|
|
|
|
/*
|
|
* Begin skeleton for external LVM library
|
|
*/
|
|
struct device *pv_dev(const pv_t *pv);
|
|
const char *pv_vg_name(const pv_t *pv);
|
|
const char *pv_dev_name(const pv_t *pv);
|
|
uint64_t pv_size(const pv_t *pv);
|
|
uint32_t pv_status(const pv_t *pv);
|
|
uint32_t pv_pe_size(const pv_t *pv);
|
|
uint64_t pv_pe_start(const pv_t *pv);
|
|
uint32_t pv_pe_count(const pv_t *pv);
|
|
uint32_t pv_pe_alloc_count(const pv_t *pv);
|
|
|
|
uint32_t vg_status(const vg_t *vg);
|
|
|
|
#endif
|