mirror of
git://sourceware.org/git/lvm2.git
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125 lines
2.2 KiB
C
125 lines
2.2 KiB
C
/*
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* Copyright (C) 2002 Sistina Software (UK) Limited.
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*
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* This file is released under the LGPL.
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*/
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#include "lvm1_label.h"
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#include "dbg_malloc.h"
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#include "pool.h"
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#include "disk-rep.h"
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#include "log.h"
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#include "label.h"
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static void _not_supported(const char *op)
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{
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log_err("The '%s' operation is not supported for the lvm1 labeller.",
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op);
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}
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static int _can_handle(struct labeller *l, struct device *dev)
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{
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struct pool *mem = (struct pool *) l->private;
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struct disk_list *dl;
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dl = read_disk(dev, mem, NULL);
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pool_empty(mem);
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return dl ? 1 : 0;
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}
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static int _write(struct labeller *l,
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struct device *dev, struct label *label)
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{
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_not_supported("write");
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return 0;
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}
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static int _remove(struct labeller *l, struct device *dev)
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{
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_not_supported("remove");
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return 0;
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}
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static struct label *_to_label(struct disk_list *dl)
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{
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struct label *l;
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if (!(l = dbg_malloc(sizeof(*l)))) {
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log_err("Couldn't allocate label.");
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return NULL;
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}
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memcpy(&l->id, &dl->pvd.pv_uuid, sizeof(l->id));
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strcpy(l->volume_type, "lvm1");
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l->version[0] = 1;
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l->version[0] = 0;
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l->version[0] = 0;
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l->extra_len = 0;
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l->extra_info = NULL;
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return l;
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}
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static int _read(struct labeller *l,
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struct device *dev, struct label **label)
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{
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struct pool *mem = (struct pool *) l->private;
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struct disk_list *dl;
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int r = 0;
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if (!(dl = read_disk(dev, mem, NULL))) {
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log_err("Couldn't read lvm1 label.");
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return 0;
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}
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/*
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* Convert the disk_list into a label structure.
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*/
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if ((*label = _to_label(dl)))
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r = 1;
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else
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stack;
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pool_empty(mem);
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return r;
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}
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static void _destroy(struct labeller *l)
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{
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struct pool *mem = (struct pool *) l->private;
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pool_destroy(mem);
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dbg_free(l->private);
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}
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struct label_ops _lvm1_ops = {
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can_handle: _can_handle,
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write: _write,
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remove: _remove,
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read: _read,
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verify: _can_handle,
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destroy: _destroy
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};
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struct labeller *lvm1_labeller_create(void)
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{
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struct labeller *l;
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struct pool *mem;
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if (!(l = dbg_malloc(sizeof(*l)))) {
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log_err("Couldn't allocate labeller object.");
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return NULL;
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}
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if (!(mem = pool_create(256))) {
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log_err("Couldn't create pool object for labeller.");
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dbg_free(l);
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return NULL;
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}
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l->ops = &_lvm1_ops;
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l->private = mem;
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return l;
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}
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