mirror of
git://sourceware.org/git/lvm2.git
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25b733809a
Lots of changes/very little testing so far => there'll be bugs!
Use 'vgcreate -M text' to create a volume group with its metadata stored
in text files. Text format metadata changes should be reasonably atomic,
with a (basic) automatic recovery mechanism if the system crashes while a
change is in progress.
Add a metadata section to lvm.conf to specify multiple directories if
you want (recommended) to keep multiple copies of the metadata (eg on
different filesystems).
e.g. metadata {
dirs = ["/etc/lvm/metadata1","/usr/local/lvm/metadata2"]
}
Plenty of refinements still in the pipeline.
48 lines
906 B
C
48 lines
906 B
C
/*
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* Copyright (C) 2001 Sistina Software (UK) Limited.
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*
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* This file is released under the GPL.
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*/
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#ifndef _LVM_UUID_H
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#define _LVM_UUID_H
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#include "lvm-types.h"
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#define ID_LEN 32
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#define ID_LEN_S "32"
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struct id {
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uint8_t uuid[ID_LEN];
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};
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/*
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* Unique logical volume identifier
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* With format1 this is VG uuid + LV uuid + '\0'
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*/
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union lvid {
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struct id id[2];
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char s[2 * sizeof(struct id) + 1];
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};
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int lvid_from_lvnum(union lvid *lvid, struct id *vgid, int lv_num);
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int lvnum_from_lvid(union lvid *lvid);
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int lvid_create(union lvid *lvid, struct id *vgid);
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int id_create(struct id *id);
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int id_valid(struct id *id);
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int id_equal(struct id *lhs, struct id *rhs);
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/*
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* Fills 'buffer' with a more human readable form
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* of the uuid.
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*/
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int id_write_format(struct id *id, char *buffer, size_t size);
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/*
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* Reads a formatted uuid.
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*/
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int id_read_format(struct id *id, char *buffer);
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#endif
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