* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.

/* $NetBSD: metadata-exported.h,v 1.1.1.3 2009/12/02 00:25:43 haad Exp $ */

/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2009 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"

#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 */

/* Layer suffix */
#define MIRROR_SYNC_LAYER "_mimagetmp"

/* 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 CONVERTING 0x00400000U /* LV */

#define MISSING_PV 0x00800000U /* PV */
#define PARTIAL_LV 0x01000000U /* LV - derived flag, not
written out in metadata*/

//#define POSTORDER_FLAG 0x02000000U /* Not real flags, reserved for
//#define POSTORDER_OPEN_FLAG 0x04000000U temporary use inside vg_read_internal. */
//#define VIRTUAL_ORIGIN 0x08000000U /* LV - 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? */

/* Mirror conversion type flags */
#define MIRROR_BY_SEG 0x00000001U /* segment-by-segment mirror */
#define MIRROR_BY_LV 0x00000002U /* mirror using whole mimage LVs */
#define MIRROR_SKIP_INIT_SYNC 0x00000010U /* skip initial sync */

/* vg_read and vg_read_for_update flags */
#define READ_ALLOW_INCONSISTENT 0x00010000U
#define READ_ALLOW_EXPORTED 0x00020000U
#define READ_WITHOUT_LOCK 0x00040000U

/* A meta-flag, useful with toollib for_each_* functions. */
#define READ_FOR_UPDATE 0x00100000U

/* vg's "read_status" field */
#define FAILED_INCONSISTENT 0x00000001U
#define FAILED_LOCKING 0x00000002U
#define FAILED_NOTFOUND 0x00000004U
#define FAILED_READ_ONLY 0x00000008U
#define FAILED_EXPORTED 0x00000010U
#define FAILED_RESIZEABLE 0x00000020U
#define FAILED_CLUSTERED 0x00000040U
#define FAILED_ALLOCATION 0x00000080U
#define FAILED_EXIST 0x00000100U
#define SUCCESS 0x00000000U

/* 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;

typedef enum {
PERCENT_0 = 0,
PERCENT_0_TO_100 = 1,
PERCENT_100 = 2,
PERCENT_INVALID = 3
} percent_range_t;

struct cmd_context;
struct format_handler;
struct labeller;

struct format_type {
struct dm_list list;
struct cmd_context *cmd;
struct format_handler *ops;
struct labeller *labeller;
const char *name;
const char *alias;
const char *orphan_vg_name;
uint32_t features;
void *library;
void *private;
};

struct pv_segment {
struct dm_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 */
};

#define pvseg_is_allocated(pvseg) ((pvseg)->lvseg)

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;
unsigned long pe_align;
unsigned long pe_align_offset;

struct dm_list segments; /* Ordered pv_segments covering complete PV */
struct dm_list tags;
};

struct format_instance {
const struct format_type *fmt;
struct dm_list metadata_areas; /* e.g. metadata locations */
void *private;
};

struct volume_group {
struct cmd_context *cmd;
struct dm_pool *vgmem;
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 dm_list pvs;

/*
* logical volumes
* The following relationship should always hold:
* dm_list_size(lvs) = user visible lv_count + snapshot_count + other invisible LVs
*
* Snapshots consist of 2 instances of "struct logical_volume":
* - cow (lv_name is visible to the user)
* - snapshot (lv_name is 'snapshotN')
*
* Mirrors consist of multiple instances of "struct logical_volume":
* - one for the mirror log
* - one for each mirror leg
* - one for the user-visible mirror LV
*/
struct dm_list lvs;

struct dm_list tags;

/*
* FIXME: Move the next fields into a different struct?
*/

/*
* List of removed physical volumes by pvreduce.
* They have to get cleared on vg_commit.
*/
struct dm_list removed_pvs;
uint32_t open_mode; /* FIXME: read or write - check lock type? */

/*
* Store result of the last vg_read().
* 0 for success else appropriate FAILURE_* bits set.
*/
uint32_t read_status;
};

/* 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 dm_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 dm_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;
void *segtype_private;

struct dm_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 dm_list snapshot_segs;
struct lv_segment *snapshot;

struct dm_list segments;
struct dm_list tags;
struct dm_list segs_using_this_lv;
};

struct pe_range {
struct dm_list list;
uint32_t start; /* PEs */
uint32_t count; /* PEs */
};

struct pv_list {
struct dm_list list;
struct physical_volume *pv;
struct dm_list *mdas; /* Metadata areas */
struct dm_list *pe_ranges; /* Ranges of PEs e.g. for allocation */
};

struct lv_list {
struct dm_list list;
struct logical_volume *lv;
};

struct pvcreate_params {
int zero;
uint64_t size;
uint64_t data_alignment;
uint64_t data_alignment_offset;
int pvmetadatacopies;
uint64_t pvmetadatasize;
int64_t labelsector;
struct id id; /* FIXME: redundant */
struct id *idp; /* 0 if no --uuid option */
uint64_t pe_start;
uint32_t extent_count;
uint32_t extent_size;
const char *restorefile; /* 0 if no --restorefile option */
force_t force;
unsigned yes;
};

struct physical_volume *pvcreate_single(struct cmd_context *cmd,
const char *pv_name,
struct pvcreate_params *pp);
void pvcreate_params_set_defaults(struct pvcreate_params *pp);

/*
* 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_internal(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 dm_list *mdas, uint64_t *label_sector,
int warnings, int scan_label_only);
struct dm_list *get_pvs(struct cmd_context *cmd);

/*
* Add/remove LV to/from volume group
*/
int link_lv_to_vg(struct volume_group *vg, struct logical_volume *lv);
int unlink_lv_from_vg(struct logical_volume *lv);
void lv_set_visible(struct logical_volume *lv);
void lv_set_hidden(struct logical_volume *lv);

/* Set full_scan to 1 to re-read every (filtered) device label */
struct dm_list *get_vgnames(struct cmd_context *cmd, int full_scan);
struct dm_list *get_vgids(struct cmd_context *cmd, int full_scan);
int scan_vgs_for_pvs(struct cmd_context *cmd);

int pv_write(struct cmd_context *cmd, struct physical_volume *pv,
struct dm_list *mdas, int64_t label_sector);
int is_pv(struct physical_volume *pv);
int move_pv(struct volume_group *vg_from, struct volume_group *vg_to,
const char *pv_name);
int move_pvs_used_by_lv(struct volume_group *vg_from,
struct volume_group *vg_to,
const char *lv_name);
int is_orphan_vg(const char *vg_name);
int is_orphan(const struct physical_volume *pv);
int vgs_are_compatible(struct cmd_context *cmd,
struct volume_group *vg_from,
struct volume_group *vg_to);
uint32_t vg_lock_newname(struct cmd_context *cmd, const char *vgname);

/*
* Return a handle to VG metadata.
*/
struct volume_group *vg_read(struct cmd_context *cmd, const char *vg_name,
const char *vgid, uint32_t flags);
struct volume_group *vg_read_for_update(struct cmd_context *cmd, const char *vg_name,
const char *vgid, uint32_t flags);

/*
* Test validity of a VG handle.
*/
uint32_t vg_read_error(struct volume_group *vg_handle);

/* pe_start and pe_end relate to any existing data so that new metadata
* areas can avoid overlap */
struct physical_volume *pv_create(const struct cmd_context *cmd,
struct device *dev,
struct id *id,
uint64_t size,
unsigned long data_alignment,
unsigned long data_alignment_offset,
uint64_t pe_start,
uint32_t existing_extent_count,
uint32_t existing_extent_size,
int pvmetadatacopies,
uint64_t pvmetadatasize, struct dm_list *mdas);
int pv_resize(struct physical_volume *pv, struct volume_group *vg,
uint32_t new_pe_count);
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 dm_list *pvh);

struct volume_group *vg_create(struct cmd_context *cmd, const char *vg_name);
int vg_remove_mdas(struct volume_group *vg);
int vg_remove_check(struct volume_group *vg);
int vg_remove(struct volume_group *vg);
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,
struct pvcreate_params *pp);
int vg_reduce(struct volume_group *vg, char *pv_name);
int vg_set_extent_size(struct volume_group *vg, uint32_t new_extent_size);
int vg_set_max_lv(struct volume_group *vg, uint32_t max_lv);
int vg_set_max_pv(struct volume_group *vg, uint32_t max_pv);
int vg_set_alloc_policy(struct volume_group *vg, alloc_policy_t alloc);
int vg_set_clustered(struct volume_group *vg, int clustered);
int vg_split_mdas(struct cmd_context *cmd, struct volume_group *vg_from,
struct volume_group *vg_to);

/* FIXME: refactor / unexport when lvremove liblvm refactoring dones */
int remove_lvs_in_vg(struct cmd_context *cmd,
struct volume_group *vg,
force_t force);
/*
* vg_release() must be called on every struct volume_group allocated
* by vg_create() or vg_read_internal() to free it when no longer required.
*/
void vg_release(struct volume_group *vg);

/* Manipulate LVs */
struct logical_volume *lv_create_empty(const char *name,
union lvid *lvid,
uint32_t status,
alloc_policy_t alloc,
struct volume_group *vg);

/* Write out LV contents */
int set_lv(struct cmd_context *cmd, struct logical_volume *lv,
uint64_t sectors, int value);

/* 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);

/* Empty an LV and add error segment */
int replace_lv_with_error_segment(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 dm_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_remove_with_dependencies(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);

uint64_t extents_from_size(struct cmd_context *cmd, uint64_t size,
uint32_t extent_size);

/* FIXME: refactor and reduce the size of this struct! */
struct lvcreate_params {
/* flags */
int snapshot; /* snap */
int zero; /* all */
int major; /* all */
int minor; /* all */
int corelog; /* mirror */
int nosync; /* mirror */

char *origin; /* snap */
const char *vg_name; /* all */
const char *lv_name; /* all */

uint32_t stripes; /* striped */
uint32_t stripe_size; /* striped */
uint32_t chunk_size; /* snapshot */
uint32_t region_size; /* mirror */

uint32_t mirrors; /* mirror */

const struct segment_type *segtype; /* all */

/* size */
uint32_t extents; /* all */
uint32_t voriginextents; /* snapshot */
uint64_t voriginsize; /* snapshot */
struct dm_list *pvh; /* all */

uint32_t permission; /* all */
uint32_t read_ahead; /* all */
alloc_policy_t alloc; /* all */

const char *tag; /* all */
};

int lv_create_single(struct volume_group *vg,
struct lvcreate_params *lp);

/*
* Functions for layer manipulation
*/
int insert_layer_for_segments_on_pv(struct cmd_context *cmd,
struct logical_volume *lv_where,
struct logical_volume *layer_lv,
uint32_t status,
struct pv_list *pv,
struct dm_list *lvs_changed);
int remove_layers_for_segments(struct cmd_context *cmd,
struct logical_volume *lv,
struct logical_volume *layer_lv,
uint32_t status_mask, struct dm_list *lvs_changed);
int remove_layers_for_segments_all(struct cmd_context *cmd,
struct logical_volume *layer_lv,
uint32_t status_mask,
struct dm_list *lvs_changed);
int split_parent_segments_for_layer(struct cmd_context *cmd,
struct logical_volume *layer_lv);
int remove_layer_from_lv(struct logical_volume *lv,
struct logical_volume *layer_lv);
struct logical_volume *insert_layer_for_lv(struct cmd_context *cmd,
struct logical_volume *lv_where,
uint32_t status,
const char *layer_suffix);

/* Find a PV within a given VG */
struct pv_list *find_pv_in_vg(const struct volume_group *vg,
const char *pv_name);
struct physical_volume *find_pv_in_vg_by_uuid(const struct volume_group *vg,
const struct id *id);

/* Find an LV within a given VG */
struct lv_list *find_lv_in_vg(const struct volume_group *vg,
const char *lv_name);

/* FIXME Merge these functions with ones above */
struct logical_volume *find_lv(const 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(const struct logical_volume *lv);

/*
* Useful functions for managing snapshots.
*/
int lv_is_origin(const struct logical_volume *lv);
int lv_is_virtual_origin(const struct logical_volume *lv);
int lv_is_cow(const struct logical_volume *lv);

/* Test if given LV is visible from user's perspective */
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);

void init_snapshot_seg(struct lv_segment *seg, struct logical_volume *origin,
struct logical_volume *cow, uint32_t chunk_size);

int vg_add_snapshot(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);

/*
* Returns visible LV count - number of LVs from user perspective
*/
unsigned vg_visible_lvs(const struct volume_group *vg);

/*
* Check if the VG reached maximal LVs count (if set)
*/
int vg_max_lv_reached(struct volume_group *vg);

/*
* Mirroring functions
*/
struct lv_segment *find_mirror_seg(struct lv_segment *seg);
int lv_add_mirrors(struct cmd_context *cmd, struct logical_volume *lv,
uint32_t mirrors, uint32_t stripes,
uint32_t region_size, uint32_t log_count,
struct dm_list *pvs, alloc_policy_t alloc, uint32_t flags);
int lv_remove_mirrors(struct cmd_context *cmd, struct logical_volume *lv,
uint32_t mirrors, uint32_t log_count,
struct dm_list *pvs, uint32_t status_mask);

int is_temporary_mirror_layer(const struct logical_volume *lv);
struct logical_volume * find_temporary_mirror(const struct logical_volume *lv);
uint32_t lv_mirror_count(const struct logical_volume *lv);
uint32_t adjusted_mirror_region_size(uint32_t extent_size, uint32_t extents,
uint32_t region_size);
int remove_mirrors_from_segments(struct logical_volume *lv,
uint32_t new_mirrors, uint32_t status_mask);
int add_mirrors_to_segments(struct cmd_context *cmd, struct logical_volume *lv,
uint32_t mirrors, uint32_t region_size,
struct dm_list *allocatable_pvs, alloc_policy_t alloc);

int remove_mirror_images(struct logical_volume *lv, uint32_t num_mirrors,
struct dm_list *removable_pvs, unsigned remove_log);
int add_mirror_images(struct cmd_context *cmd, struct logical_volume *lv,
uint32_t mirrors, uint32_t stripes, uint32_t region_size,
struct dm_list *allocatable_pvs, alloc_policy_t alloc,
uint32_t log_count);
struct logical_volume *detach_mirror_log(struct lv_segment *seg);
int attach_mirror_log(struct lv_segment *seg, struct logical_volume *lv);
int remove_mirror_log(struct cmd_context *cmd, struct logical_volume *lv,
struct dm_list *removable_pvs);
int add_mirror_log(struct cmd_context *cmd, struct logical_volume *lv,
uint32_t log_count, uint32_t region_size,
struct dm_list *allocatable_pvs, alloc_policy_t alloc);

int reconfigure_mirror_images(struct lv_segment *mirrored_seg, uint32_t num_mirrors,
struct dm_list *removable_pvs, unsigned remove_log);
int collapse_mirrored_lv(struct logical_volume *lv);
int shift_mirror_images(struct lv_segment *mirrored_seg, unsigned mimage);

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,
const char *uuid,
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,
percent_range_t *percent_range);
struct dm_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 struct physical_volume *pv);
const char *pv_vg_name(const struct physical_volume *pv);
const char *pv_dev_name(const struct physical_volume *pv);
uint64_t pv_size(const struct physical_volume *pv);
uint32_t pv_status(const struct physical_volume *pv);
uint32_t pv_pe_size(const struct physical_volume *pv);
uint64_t pv_pe_start(const struct physical_volume *pv);
uint32_t pv_pe_count(const struct physical_volume *pv);
uint32_t pv_pe_alloc_count(const struct physical_volume *pv);
uint32_t pv_mda_count(const struct physical_volume *pv);

uint64_t lv_size(const struct logical_volume *lv);

int vg_missing_pv_count(const struct volume_group *vg);
uint32_t vg_seqno(const struct volume_group *vg);
uint32_t vg_status(const struct volume_group *vg);
uint64_t vg_size(const struct volume_group *vg);
uint64_t vg_free(const struct volume_group *vg);
uint64_t vg_extent_size(const struct volume_group *vg);
uint64_t vg_extent_count(const struct volume_group *vg);
uint64_t vg_free_count(const struct volume_group *vg);
uint64_t vg_pv_count(const struct volume_group *vg);
uint64_t vg_max_pv(const struct volume_group *vg);
uint64_t vg_max_lv(const struct volume_group *vg);
uint32_t vg_mda_count(const struct volume_group *vg);
int vg_check_write_mode(struct volume_group *vg);
#define vg_is_clustered(vg) (vg_status((vg)) & CLUSTERED)
#define vg_is_exported(vg) (vg_status((vg)) & EXPORTED_VG)
#define vg_is_resizeable(vg) (vg_status((vg)) & RESIZEABLE_VG)

int lv_has_unknown_segments(const struct logical_volume *lv);
int vg_has_unknown_segments(const struct volume_group *vg);

struct vgcreate_params {
char *vg_name;
uint32_t extent_size;
size_t max_pv;
size_t max_lv;
alloc_policy_t alloc;
int clustered; /* FIXME: put this into a 'status' variable instead? */
};

int vgcreate_params_validate(struct cmd_context *cmd,
struct vgcreate_params *vp);

int validate_vg_rename_params(struct cmd_context *cmd,
const char *vg_name_old,
const char *vg_name_new);
#endif