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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2008 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _LVM_CACHE_H
#define _LVM_CACHE_H
#include "lib/device/dev-cache.h"
#include "lib/device/dev-type.h"
#include "lib/uuid/uuid.h"
#include "lib/label/label.h"
#include "lib/locking/locking.h"
#define ORPHAN_PREFIX VG_ORPHANS
#define ORPHAN_VG_NAME(fmt) ORPHAN_PREFIX "_" fmt
/* LVM specific per-volume info */
/* Eventual replacement for struct physical_volume perhaps? */
struct cmd_context;
struct format_type;
struct volume_group;
struct physical_volume;
struct dm_config_tree;
struct format_instance;
struct metadata_area;
struct disk_locn;
struct lvmcache_vginfo;
/*
* vgsummary represents a summary of the VG that is read
* without a lock during label scan. It's used to populate
* basic lvmcache vginfo/info during label scan prior to
* vg_read().
*/
struct lvmcache_vgsummary {
const char *vgname;
char vgid[ID_LEN + 1];
uint64_t vgstatus;
char *creation_host;
const char *system_id;
const char *lock_type;
uint32_t seqno;
uint32_t mda_checksum;
size_t mda_size;
int mda_num; /* 1 = summary from mda1, 2 = summary from mda2 */
unsigned mda_ignored:1;
unsigned zero_offset:1;
unsigned mismatch:1; /* lvmcache sets if this summary differs from previous values */
struct dm_list pvsummaries;
};
int lvmcache_init(struct cmd_context *cmd);
void lvmcache_destroy(struct cmd_context *cmd, int retain_orphans, int reset);
int lvmcache_label_scan(struct cmd_context *cmd);
int lvmcache_label_rescan_vg(struct cmd_context *cmd, const char *vgname, const char *vgid);
int lvmcache_label_rescan_vg_rw(struct cmd_context *cmd, const char *vgname, const char *vgid);
int lvmcache_label_reopen_vg_rw(struct cmd_context *cmd, const char *vgname, const char *vgid);
/* Add/delete a device */
struct lvmcache_info *lvmcache_add(struct cmd_context *cmd, struct labeller *labeller, const char *pvid,
struct device *dev, uint64_t label_sector,
const char *vgname, const char *vgid,
uint32_t vgstatus, int *is_duplicate);
int lvmcache_add_orphan_vginfo(struct cmd_context *cmd, const char *vgname, struct format_type *fmt);
void lvmcache_del(struct lvmcache_info *info);
void lvmcache_del_dev(struct device *dev);
/* Update things */
int lvmcache_update_vgname_and_id(struct cmd_context *cmd, struct lvmcache_info *info,
struct lvmcache_vgsummary *vgsummary);
int lvmcache_update_vg_from_read(struct volume_group *vg, unsigned precommitted);
int lvmcache_update_vg_from_write(struct volume_group *vg);
void lvmcache_lock_vgname(const char *vgname, int read_only);
void lvmcache_unlock_vgname(const char *vgname);
/* Queries */
int lvmcache_lookup_mda(struct lvmcache_vgsummary *vgsummary);
struct lvmcache_vginfo *lvmcache_vginfo_from_vgname(const char *vgname,
const char *vgid);
struct lvmcache_vginfo *lvmcache_vginfo_from_vgid(const char *vgid);
struct lvmcache_info *lvmcache_info_from_pvid(const char *pvid, struct device *dev, int valid_only);
struct lvmcache_info *lvmcache_info_from_pv_id(const struct id *pv_id, struct device *dev, int valid_only);
const char *lvmcache_vgname_from_vgid(struct dm_pool *mem, const char *vgid);
const char *lvmcache_vgid_from_vgname(struct cmd_context *cmd, const char *vgname);
struct device *lvmcache_device_from_pv_id(struct cmd_context *cmd, const struct id *pv_id, uint64_t *label_sector);
const char *lvmcache_vgname_from_info(struct lvmcache_info *info);
const struct format_type *lvmcache_fmt_from_info(struct lvmcache_info *info);
int lvmcache_get_vgnameids(struct cmd_context *cmd,
struct dm_list *vgnameids,
const char *only_this_vgname,
int include_internal);
void lvmcache_drop_metadata(const char *vgname, int drop_precommitted);
void lvmcache_commit_metadata(const char *vgname);
int lvmcache_fid_add_mdas(struct lvmcache_info *info, struct format_instance *fid,
const char *id, int id_len);
int lvmcache_fid_add_mdas_pv(struct lvmcache_info *info, struct format_instance *fid);
int lvmcache_fid_add_mdas_vg(struct lvmcache_vginfo *vginfo, struct format_instance *fid);
int lvmcache_populate_pv_fields(struct lvmcache_info *info,
struct volume_group *vg,
struct physical_volume *pv);
int lvmcache_check_format(struct lvmcache_info *info, const struct format_type *fmt);
void lvmcache_del_mdas(struct lvmcache_info *info);
void lvmcache_del_das(struct lvmcache_info *info);
void lvmcache_del_bas(struct lvmcache_info *info);
int lvmcache_add_mda(struct lvmcache_info *info, struct device *dev,
uint64_t start, uint64_t size, unsigned ignored,
struct metadata_area **mda_new);
int lvmcache_add_da(struct lvmcache_info *info, uint64_t start, uint64_t size);
int lvmcache_add_ba(struct lvmcache_info *info, uint64_t start, uint64_t size);
void lvmcache_set_ext_version(struct lvmcache_info *info, uint32_t version);
uint32_t lvmcache_ext_version(struct lvmcache_info *info);
void lvmcache_set_ext_flags(struct lvmcache_info *info, uint32_t flags);
uint32_t lvmcache_ext_flags(struct lvmcache_info *info);
const struct format_type *lvmcache_fmt(struct lvmcache_info *info);
struct label *lvmcache_get_label(struct lvmcache_info *info);
struct label *lvmcache_get_dev_label(struct device *dev);
int lvmcache_has_dev_info(struct device *dev);
void lvmcache_update_pv(struct lvmcache_info *info, struct physical_volume *pv,
const struct format_type *fmt);
int lvmcache_update_das(struct lvmcache_info *info, struct physical_volume *pv);
int lvmcache_update_bas(struct lvmcache_info *info, struct physical_volume *pv);
int lvmcache_foreach_mda(struct lvmcache_info *info,
int (*fun)(struct metadata_area *, void *),
void *baton);
int lvmcache_foreach_da(struct lvmcache_info *info,
int (*fun)(struct disk_locn *, void *),
void *baton);
int lvmcache_foreach_ba(struct lvmcache_info *info,
int (*fun)(struct disk_locn *, void *),
void *baton);
int lvmcache_foreach_pv(struct lvmcache_vginfo *vginfo,
int (*fun)(struct lvmcache_info *, void *), void * baton);
uint64_t lvmcache_device_size(struct lvmcache_info *info);
void lvmcache_set_device_size(struct lvmcache_info *info, uint64_t size);
struct device *lvmcache_device(struct lvmcache_info *info);
unsigned lvmcache_mda_count(struct lvmcache_info *info);
uint64_t lvmcache_smallest_mda_size(struct lvmcache_info *info);
bool lvmcache_has_duplicate_devs(void);
void lvmcache_del_dev_from_duplicates(struct device *dev);
bool lvmcache_dev_is_unused_duplicate(struct device *dev);
int lvmcache_pvid_in_unused_duplicates(const char *pvid);
int lvmcache_get_unused_duplicates(struct cmd_context *cmd, struct dm_list *head);
int vg_has_duplicate_pvs(struct volume_group *vg);
int lvmcache_found_duplicate_vgnames(void);
bool lvmcache_has_duplicate_local_vgname(const char *vgid, const char *vgname);
int lvmcache_contains_lock_type_sanlock(struct cmd_context *cmd);
void lvmcache_get_max_name_lengths(struct cmd_context *cmd,
unsigned *pv_max_name_len, unsigned *vg_max_name_len);
int lvmcache_vg_is_foreign(struct cmd_context *cmd, const char *vgname, const char *vgid);
bool lvmcache_scan_mismatch(struct cmd_context *cmd, const char *vgname, const char *vgid);
int lvmcache_vginfo_has_pvid(struct lvmcache_vginfo *vginfo, const char *pvid_arg);
uint64_t lvmcache_max_metadata_size(void);
void lvmcache_save_metadata_size(uint64_t val);
int dev_in_device_list(struct device *dev, struct dm_list *head);
bool lvmcache_has_bad_metadata(struct device *dev);
bool lvmcache_has_old_metadata(struct cmd_context *cmd, const char *vgname, const char *vgid, struct device *dev);
void lvmcache_get_outdated_devs(struct cmd_context *cmd,
const char *vgname, const char *vgid,
struct dm_list *devs);
void lvmcache_get_outdated_mdas(struct cmd_context *cmd,
const char *vgname, const char *vgid,
struct device *dev,
struct dm_list **mdas);
bool lvmcache_is_outdated_dev(struct cmd_context *cmd,
const char *vgname, const char *vgid,
struct device *dev);
void lvmcache_del_outdated_devs(struct cmd_context *cmd,
const char *vgname, const char *vgid);
void lvmcache_save_bad_mda(struct lvmcache_info *info, struct metadata_area *mda);
void lvmcache_del_save_bad_mda(struct lvmcache_info *info, int mda_num, int bad_mda_flag);
void lvmcache_get_bad_mdas(struct cmd_context *cmd,
const char *vgname, const char *vgid,
struct dm_list *bad_mda_list);
void lvmcache_get_mdas(struct cmd_context *cmd,
const char *vgname, const char *vgid,
struct dm_list *mda_list);
const char *dev_filtered_reason(struct device *dev);
const char *devname_error_reason(const char *devname);
struct metadata_area *lvmcache_get_dev_mda(struct device *dev, int mda_num);
void lvmcache_extra_md_component_checks(struct cmd_context *cmd);
unsigned int lvmcache_vg_info_count(void);
#endif
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