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mirror of git://sourceware.org/git/lvm2.git synced 2024-12-22 17:35:59 +03:00
lvm2/lib/format1/lvm1_label.c
2002-01-14 10:00:56 +00:00

125 lines
2.2 KiB
C

/*
* Copyright (C) 2002 Sistina Software (UK) Limited.
*
* This file is released under the LGPL.
*/
#include "lvm1_label.h"
#include "dbg_malloc.h"
#include "pool.h"
#include "disk-rep.h"
#include "log.h"
#include "label.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, struct device *dev)
{
struct pool *mem = (struct pool *) l->private;
struct disk_list *dl;
dl = read_disk(dev, mem, NULL);
pool_empty(mem);
return dl ? 1 : 0;
}
static int _write(struct labeller *l,
struct device *dev, struct label *label)
{
_not_supported("write");
return 0;
}
static int _remove(struct labeller *l, struct device *dev)
{
_not_supported("remove");
return 0;
}
static struct label *_to_label(struct disk_list *dl)
{
struct label *l;
if (!(l = dbg_malloc(sizeof(*l)))) {
log_err("Couldn't allocate label.");
return NULL;
}
memcpy(&l->id, &dl->pvd.pv_uuid, sizeof(l->id));
strcpy(l->volume_type, "lvm1");
l->version[0] = 1;
l->version[0] = 0;
l->version[0] = 0;
l->extra_len = 0;
l->extra_info = NULL;
return l;
}
static int _read(struct labeller *l,
struct device *dev, struct label **label)
{
struct pool *mem = (struct pool *) l->private;
struct disk_list *dl;
int r = 0;
if (!(dl = read_disk(dev, mem, NULL))) {
log_err("Couldn't read lvm1 label.");
return 0;
}
/*
* Convert the disk_list into a label structure.
*/
if ((*label = _to_label(dl)))
r = 1;
else
stack;
pool_empty(mem);
return r;
}
static void _destroy(struct labeller *l)
{
struct pool *mem = (struct pool *) l->private;
pool_destroy(mem);
dbg_free(l->private);
}
struct label_ops _lvm1_ops = {
can_handle: _can_handle,
write: _write,
remove: _remove,
read: _read,
verify: _can_handle,
destroy: _destroy
};
struct labeller *lvm1_labeller_create(void)
{
struct labeller *l;
struct pool *mem;
if (!(l = dbg_malloc(sizeof(*l)))) {
log_err("Couldn't allocate labeller object.");
return NULL;
}
if (!(mem = pool_create(256))) {
log_err("Couldn't create pool object for labeller.");
dbg_free(l);
return NULL;
}
l->ops = &_lvm1_ops;
l->private = mem;
return l;
}