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/*
* 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 "cache.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 cache_info *info;
if (!(info = cache_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 = (void *) fmt;
return l;
}
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