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9b30dfb967
Switch to use const char pointers to avoid changes of these structure members and having better control over, were these members could be modified.
136 lines
4.2 KiB
C
136 lines
4.2 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2010 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_VG_H
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#define _LVM_VG_H
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struct cmd_context;
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struct dm_pool;
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struct format_instance;
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struct dm_list;
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struct id;
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typedef enum {
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ALLOC_INVALID,
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ALLOC_CONTIGUOUS,
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ALLOC_CLING,
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ALLOC_CLING_BY_TAGS, /* Internal - never written or displayed. */
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ALLOC_NORMAL,
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ALLOC_ANYWHERE,
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ALLOC_INHERIT
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} alloc_policy_t;
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struct volume_group {
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struct cmd_context *cmd;
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struct dm_pool *vgmem;
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struct format_instance *fid;
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struct dm_list *cmd_vgs;/* List of wanted/locked and opened VGs */
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uint32_t cmd_missing_vgs;/* Flag marks missing VG */
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uint32_t seqno; /* Metadata sequence number */
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alloc_policy_t alloc;
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uint64_t status;
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struct id id;
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const char *name;
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const char *old_name; /* Set during vgrename and vgcfgrestore */
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char *system_id;
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uint32_t extent_size;
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uint32_t extent_count;
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uint32_t free_count;
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uint32_t max_lv;
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uint32_t max_pv;
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/* physical volumes */
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uint32_t pv_count;
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struct dm_list pvs;
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/*
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* logical volumes
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* The following relationship should always hold:
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* dm_list_size(lvs) = user visible lv_count + snapshot_count + other invisible LVs
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*
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* Snapshots consist of 2 instances of "struct logical_volume":
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* - cow (lv_name is visible to the user)
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* - snapshot (lv_name is 'snapshotN')
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*
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* Mirrors consist of multiple instances of "struct logical_volume":
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* - one for the mirror log
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* - one for each mirror leg
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* - one for the user-visible mirror LV
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*/
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struct dm_list lvs;
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struct dm_list tags;
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/*
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* FIXME: Move the next fields into a different struct?
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*/
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/*
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* List of removed physical volumes by pvreduce.
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* They have to get cleared on vg_commit.
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*/
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struct dm_list removed_pvs;
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uint32_t open_mode; /* FIXME: read or write - check lock type? */
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/*
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* Store result of the last vg_read().
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* 0 for success else appropriate FAILURE_* bits set.
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*/
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uint32_t read_status;
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uint32_t mda_copies; /* target number of mdas for this VG */
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};
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char *vg_fmt_dup(const struct volume_group *vg);
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char *vg_name_dup(const struct volume_group *vg);
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char *vg_system_id_dup(const struct volume_group *vg);
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uint32_t vg_seqno(const struct volume_group *vg);
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uint64_t vg_status(const struct volume_group *vg);
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int vg_set_alloc_policy(struct volume_group *vg, alloc_policy_t alloc);
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int vg_set_clustered(struct volume_group *vg, int clustered);
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uint64_t vg_size(const struct volume_group *vg);
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uint64_t vg_free(const struct volume_group *vg);
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uint64_t vg_extent_size(const struct volume_group *vg);
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int vg_set_extent_size(struct volume_group *vg, uint32_t new_extent_size);
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uint64_t vg_extent_count(const struct volume_group *vg);
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uint64_t vg_free_count(const struct volume_group *vg);
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uint64_t vg_pv_count(const struct volume_group *vg);
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uint64_t vg_max_pv(const struct volume_group *vg);
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int vg_set_max_pv(struct volume_group *vg, uint32_t max_pv);
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uint64_t vg_max_lv(const struct volume_group *vg);
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int vg_set_max_lv(struct volume_group *vg, uint32_t max_lv);
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uint32_t vg_mda_count(const struct volume_group *vg);
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uint32_t vg_mda_used_count(const struct volume_group *vg);
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uint32_t vg_mda_copies(const struct volume_group *vg);
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int vg_set_mda_copies(struct volume_group *vg, uint32_t mda_copies);
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/*
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* Returns visible LV count - number of LVs from user perspective
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*/
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unsigned vg_visible_lvs(const struct volume_group *vg);
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/*
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* Count snapshot LVs.
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*/
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unsigned snapshot_count(const struct volume_group *vg);
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uint64_t vg_mda_size(const struct volume_group *vg);
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uint64_t vg_mda_free(const struct volume_group *vg);
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char *vg_attr_dup(struct dm_pool *mem, const struct volume_group *vg);
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char *vg_uuid_dup(const struct volume_group *vg);
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char *vg_tags_dup(const struct volume_group *vg);
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#endif /* _LVM_VG_H */
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