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5abdb52fdc
The list of strings is used quite frequently and we'd like to reuse this simple structure for report selection support too. Make it part of libdevmapper for general reuse throughout the code. This also simplifies the LVM code a bit since we don't need to include and manage lvm-types.h anymore (the string list was the only structure defined there).
161 lines
6.6 KiB
C
161 lines
6.6 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2008 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 _LVM_CACHE_H
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#define _LVM_CACHE_H
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#include "dev-cache.h"
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#include "dev-type.h"
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#include "uuid.h"
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#include "label.h"
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#include "locking.h"
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#define ORPHAN_PREFIX VG_ORPHANS
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#define ORPHAN_VG_NAME(fmt) ORPHAN_PREFIX "_" fmt
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/* LVM specific per-volume info */
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/* Eventual replacement for struct physical_volume perhaps? */
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struct cmd_context;
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struct format_type;
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struct volume_group;
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struct physical_volume;
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struct dm_config_tree;
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struct format_instance;
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struct metadata_area;
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struct disk_locn;
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struct lvmcache_vginfo;
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int lvmcache_init(void);
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void lvmcache_allow_reads_with_lvmetad(void);
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void lvmcache_destroy(struct cmd_context *cmd, int retain_orphans, int reset);
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/* Set full_scan to 1 to reread every filtered device label or
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* 2 to rescan /dev for new devices */
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int lvmcache_label_scan(struct cmd_context *cmd, int full_scan);
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/* Add/delete a device */
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struct lvmcache_info *lvmcache_add(struct labeller *labeller, const char *pvid,
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struct device *dev,
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const char *vgname, const char *vgid,
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uint32_t vgstatus);
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int lvmcache_add_orphan_vginfo(const char *vgname, struct format_type *fmt);
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void lvmcache_del(struct lvmcache_info *info);
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/* Update things */
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int lvmcache_update_vgname_and_id(struct lvmcache_info *info,
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const char *vgname, const char *vgid,
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uint32_t vgstatus, const char *hostname);
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int lvmcache_update_vg(struct volume_group *vg, unsigned precommitted);
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void lvmcache_lock_vgname(const char *vgname, int read_only);
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void lvmcache_unlock_vgname(const char *vgname);
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int lvmcache_verify_lock_order(const char *vgname);
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/* Queries */
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const struct format_type *lvmcache_fmt_from_vgname(struct cmd_context *cmd, const char *vgname, const char *vgid, unsigned revalidate_labels);
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/* Decrement and test if there are still vg holders in vginfo. */
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int lvmcache_vginfo_holders_dec_and_test_for_zero(struct lvmcache_vginfo *vginfo);
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struct lvmcache_vginfo *lvmcache_vginfo_from_vgname(const char *vgname,
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const char *vgid);
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struct lvmcache_vginfo *lvmcache_vginfo_from_vgid(const char *vgid);
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struct lvmcache_info *lvmcache_info_from_pvid(const char *pvid, int valid_only);
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const char *lvmcache_vgname_from_vgid(struct dm_pool *mem, const char *vgid);
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struct device *lvmcache_device_from_pvid(struct cmd_context *cmd, const struct id *pvid,
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unsigned *scan_done_once, uint64_t *label_sector);
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const char *lvmcache_pvid_from_devname(struct cmd_context *cmd,
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const char *dev_name);
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char *lvmcache_vgname_from_pvid(struct cmd_context *cmd, const char *pvid);
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const char *lvmcache_vgname_from_info(struct lvmcache_info *info);
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int lvmcache_vgs_locked(void);
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int lvmcache_vgname_is_locked(const char *vgname);
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void lvmcache_seed_infos_from_lvmetad(struct cmd_context *cmd);
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/* Returns list of struct dm_str_list containing pool-allocated copy of vgnames */
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/* If include_internal is not set, return only proper vg names. */
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struct dm_list *lvmcache_get_vgnames(struct cmd_context *cmd,
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int include_internal);
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/* Returns list of struct dm_str_list containing pool-allocated copy of vgids */
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/* If include_internal is not set, return only proper vg ids. */
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struct dm_list *lvmcache_get_vgids(struct cmd_context *cmd,
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int include_internal);
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/* Returns list of struct dm_str_list containing pool-allocated copy of pvids */
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struct dm_list *lvmcache_get_pvids(struct cmd_context *cmd, const char *vgname,
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const char *vgid);
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/* Returns cached volume group metadata. */
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struct volume_group *lvmcache_get_vg(struct cmd_context *cmd, const char *vgname,
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const char *vgid, unsigned precommitted);
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void lvmcache_drop_metadata(const char *vgname, int drop_precommitted);
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void lvmcache_commit_metadata(const char *vgname);
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int lvmcache_pvid_is_locked(const char *pvid);
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int lvmcache_fid_add_mdas(struct lvmcache_info *info, struct format_instance *fid,
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const char *id, int id_len);
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int lvmcache_fid_add_mdas_pv(struct lvmcache_info *info, struct format_instance *fid);
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int lvmcache_fid_add_mdas_vg(struct lvmcache_vginfo *vginfo, struct format_instance *fid);
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int lvmcache_populate_pv_fields(struct lvmcache_info *info,
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struct physical_volume *pv,
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int scan_label_only);
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int lvmcache_check_format(struct lvmcache_info *info, const struct format_type *fmt);
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void lvmcache_del_mdas(struct lvmcache_info *info);
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void lvmcache_del_das(struct lvmcache_info *info);
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void lvmcache_del_bas(struct lvmcache_info *info);
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int lvmcache_add_mda(struct lvmcache_info *info, struct device *dev,
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uint64_t start, uint64_t size, unsigned ignored);
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int lvmcache_add_da(struct lvmcache_info *info, uint64_t start, uint64_t size);
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int lvmcache_add_ba(struct lvmcache_info *info, uint64_t start, uint64_t size);
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const struct format_type *lvmcache_fmt(struct lvmcache_info *info);
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struct label *lvmcache_get_label(struct lvmcache_info *info);
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void lvmcache_update_pv(struct lvmcache_info *info, struct physical_volume *pv,
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const struct format_type *fmt);
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int lvmcache_update_das(struct lvmcache_info *info, struct physical_volume *pv);
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int lvmcache_update_bas(struct lvmcache_info *info, struct physical_volume *pv);
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int lvmcache_foreach_mda(struct lvmcache_info *info,
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int (*fun)(struct metadata_area *, void *),
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void *baton);
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int lvmcache_foreach_da(struct lvmcache_info *info,
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int (*fun)(struct disk_locn *, void *),
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void *baton);
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int lvmcache_foreach_ba(struct lvmcache_info *info,
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int (*fun)(struct disk_locn *, void *),
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void *baton);
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int lvmcache_foreach_pv(struct lvmcache_vginfo *vg,
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int (*fun)(struct lvmcache_info *, void *), void * baton);
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uint64_t lvmcache_device_size(struct lvmcache_info *info);
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void lvmcache_set_device_size(struct lvmcache_info *info, uint64_t size);
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struct device *lvmcache_device(struct lvmcache_info *info);
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void lvmcache_make_valid(struct lvmcache_info *info);
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int lvmcache_is_orphan(struct lvmcache_info *info);
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int lvmcache_uncertain_ownership(struct lvmcache_info *info);
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unsigned lvmcache_mda_count(struct lvmcache_info *info);
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int lvmcache_vgid_is_cached(const char *vgid);
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uint64_t lvmcache_smallest_mda_size(struct lvmcache_info *info);
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#endif
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