/* $NetBSD: pool_label.c,v 1.1.1.1 2008/12/22 00:17:51 haad Exp $ */ /* * Copyright (C) 1997-2004 Sistina Software, Inc. All rights reserved. * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. * * This file is part of LVM2. * * This copyrighted material is made available to anyone wishing to use, * modify, copy, or redistribute it subject to the terms and conditions * of the GNU Lesser General Public License v.2.1. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "lib.h" #include "label.h" #include "metadata.h" #include "xlate.h" #include "disk_rep.h" #include "pool_label.h" #include #include static void _pool_not_supported(const char *op) { log_error("The '%s' operation is not supported for the pool labeller.", op); } static int _pool_can_handle(struct labeller *l __attribute((unused)), void *buf, uint64_t sector) { struct pool_disk pd; /* * POOL label must always be in first sector */ if (sector) return 0; pool_label_in(&pd, buf); /* can ignore 8 rightmost bits for ondisk format check */ if ((pd.pl_magic == POOL_MAGIC) && (pd.pl_version >> 8 == POOL_VERSION >> 8)) return 1; return 0; } static int _pool_write(struct label *label __attribute((unused)), void *buf __attribute((unused))) { _pool_not_supported("write"); return 0; } static int _pool_read(struct labeller *l, struct device *dev, void *buf, struct label **label) { struct pool_list pl; return read_pool_label(&pl, l, dev, buf, label); } static int _pool_initialise_label(struct labeller *l __attribute((unused)), struct label *label) { strcpy(label->type, "POOL"); return 1; } static void _pool_destroy_label(struct labeller *l __attribute((unused)), struct label *label __attribute((unused))) { return; } static void _label_pool_destroy(struct labeller *l) { dm_free(l); } struct label_ops _pool_ops = { .can_handle = _pool_can_handle, .write = _pool_write, .read = _pool_read, .verify = _pool_can_handle, .initialise_label = _pool_initialise_label, .destroy_label = _pool_destroy_label, .destroy = _label_pool_destroy, }; struct labeller *pool_labeller_create(struct format_type *fmt) { struct labeller *l; if (!(l = dm_malloc(sizeof(*l)))) { log_error("Couldn't allocate labeller object."); return NULL; } l->ops = &_pool_ops; l->private = (const void *) fmt; return l; }