mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-22 17:35:59 +03:00
108 lines
2.0 KiB
C
108 lines
2.0 KiB
C
/*
|
|
* Copyright (C) 2002 Sistina Software (UK) Limited.
|
|
*
|
|
* This file is released under the LGPL.
|
|
*/
|
|
|
|
#include "lib.h"
|
|
#include "lvm1-label.h"
|
|
#include "disk-rep.h"
|
|
#include "label.h"
|
|
#include "metadata.h"
|
|
#include "xlate.h"
|
|
#include "lvmcache.h"
|
|
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
|
|
static void _not_supported(const char *op)
|
|
{
|
|
log_err("The '%s' operation is not supported for the lvm1 labeller.",
|
|
op);
|
|
}
|
|
|
|
static int _can_handle(struct labeller *l, char *buf, uint64_t sector)
|
|
{
|
|
struct pv_disk *pvd = (struct pv_disk *) buf;
|
|
uint32_t version;
|
|
|
|
/* LVM1 label must always be in first sector */
|
|
if (sector)
|
|
return 0;
|
|
|
|
version = xlate16(pvd->version);
|
|
|
|
if (pvd->id[0] == 'H' && pvd->id[1] == 'M' &&
|
|
(version == 1 || version == 2))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int _write(struct label *label, char *buf)
|
|
{
|
|
_not_supported("write");
|
|
return 0;
|
|
}
|
|
|
|
static int _read(struct labeller *l, struct device *dev, char *buf,
|
|
struct label **label)
|
|
{
|
|
struct pv_disk *pvd = (struct pv_disk *) buf;
|
|
struct lvmcache_info *info;
|
|
|
|
munge_exported_vg(pvd);
|
|
if (!(info = lvmcache_add(l, pvd->pv_uuid, dev, pvd->vg_name, NULL)))
|
|
return 0;
|
|
*label = info->label;
|
|
|
|
info->device_size = xlate32(pvd->pv_size) << SECTOR_SHIFT;
|
|
list_init(&info->mdas);
|
|
|
|
info->status &= ~CACHE_INVALID;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int _initialise_label(struct labeller *l, struct label *label)
|
|
{
|
|
strcpy(label->type, "LVM1");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void _destroy_label(struct labeller *l, struct label *label)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static void _destroy(struct labeller *l)
|
|
{
|
|
dbg_free(l);
|
|
}
|
|
|
|
struct label_ops _lvm1_ops = {
|
|
can_handle:_can_handle,
|
|
write:_write,
|
|
read:_read,
|
|
verify:_can_handle,
|
|
initialise_label:_initialise_label,
|
|
destroy_label:_destroy_label,
|
|
destroy:_destroy
|
|
};
|
|
|
|
struct labeller *lvm1_labeller_create(struct format_type *fmt)
|
|
{
|
|
struct labeller *l;
|
|
|
|
if (!(l = dbg_malloc(sizeof(*l)))) {
|
|
log_err("Couldn't allocate labeller object.");
|
|
return NULL;
|
|
}
|
|
|
|
l->ops = &_lvm1_ops;
|
|
l->private = (const void *) fmt;
|
|
|
|
return l;
|
|
}
|