mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-22 17:35:59 +03:00
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.
61 lines
1.1 KiB
C
61 lines
1.1 KiB
C
/*
|
|
* Copyright (C) 2001 Sistina Software (UK) Limited.
|
|
*
|
|
* This file is released under the LGPL.
|
|
*/
|
|
|
|
#include "log.h"
|
|
#include "pool.h"
|
|
#include "disk-rep.h"
|
|
|
|
/*
|
|
* FIXME: Quick hack. We can use caching to
|
|
* prevent a total re-read, even so vg_number
|
|
* causes the tools to check *every* pv. Yuck.
|
|
* Put in separate file so it wouldn't contaminate
|
|
* other code.
|
|
*/
|
|
int get_free_vg_number(struct format_instance *fid, struct dev_filter *filter,
|
|
const char *candidate_vg, int *result)
|
|
{
|
|
struct list *pvh;
|
|
struct list all_pvs;
|
|
struct disk_list *dl;
|
|
struct pool *mem = pool_create(10 * 1024);
|
|
int numbers[MAX_VG], i, r = 0;
|
|
|
|
list_init(&all_pvs);
|
|
|
|
if (!mem) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (!read_pvs_in_vg(fid->fmt, NULL, filter, mem, &all_pvs)) {
|
|
stack;
|
|
goto out;
|
|
}
|
|
|
|
memset(numbers, 0, sizeof(numbers));
|
|
|
|
list_iterate(pvh, &all_pvs) {
|
|
dl = list_item(pvh, struct disk_list);
|
|
if (!*dl->pvd.vg_name || !strcmp(dl->pvd.vg_name, candidate_vg))
|
|
continue;
|
|
|
|
numbers[dl->vgd.vg_number] = 1;
|
|
}
|
|
|
|
for (i = 0; i < MAX_VG; i++) {
|
|
if (!numbers[i]) {
|
|
r = 1;
|
|
*result = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
out:
|
|
pool_destroy(mem);
|
|
return r;
|
|
}
|