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.
60 lines
1.1 KiB
C
60 lines
1.1 KiB
C
/*
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* Copyright (C) 2001 Sistina Software
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*
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* This file is released under the LGPL.
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*/
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#include "log.h"
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#include "metadata.h"
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/*
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* Returns success if the segments were
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* successfully merged. If the do merge, 'first'
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* will be adjusted to contain both areas.
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*/
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static int _merge(struct stripe_segment *first, struct stripe_segment *second)
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{
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int s;
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uint32_t width;
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if (!first ||
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(first->stripes != second->stripes) ||
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(first->stripe_size != second->stripe_size))
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return 0;
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for (s = 0; s < first->stripes; s++) {
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width = first->len / first->stripes;
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if ((first->area[s].pv != second->area[s].pv) ||
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(first->area[s].pe + width != second->area[s].pe))
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return 0;
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}
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/* we should merge */
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first->len += second->len;
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return 1;
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}
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int lv_merge_segments(struct logical_volume *lv)
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{
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struct list *segh;
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struct stripe_segment *current, *prev = NULL;
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list_iterate(segh, &lv->segments) {
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current = list_item(segh, struct stripe_segment);
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if (_merge(prev, current))
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list_del(¤t->list);
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else
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prev = current;
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}
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return 1;
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}
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int lv_check_segments(struct logical_volume *lv)
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{
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return 1;
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}
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