4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
27 #pragma ident "%Z%%M% %I% %E% SMI"
30 * The 'missing' vdev is a special vdev type used only during import. It
31 * signifies a placeholder in the root vdev for some vdev that we know is
32 * missing. We pass it down to the kernel to allow the rest of the
33 * configuration to parsed and an attempt made to open all available devices.
34 * Because its GUID is always 0, we know that the guid sum will mismatch and we
35 * won't be able to open the pool anyway.
38 #include <sys/zfs_context.h>
40 #include <sys/vdev_impl.h>
41 #include <sys/fs/zfs.h>
46 vdev_missing_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift)
49 * Really this should just fail. But then the root vdev will be in the
50 * faulted state with VDEV_AUX_NO_REPLICAS, when what we really want is
51 * VDEV_AUX_BAD_GUID_SUM. So we pretend to succeed, knowing that we
52 * will fail the GUID sum check before ever trying to open the pool.
54 *psize = SPA_MINDEVSIZE;
55 *ashift = SPA_MINBLOCKSHIFT;
61 vdev_missing_close(vdev_t *vd)
67 vdev_missing_io_start(zio_t *zio)
69 zio->io_error = ENOTSUP;
70 zio_next_stage_async(zio);
75 vdev_missing_io_done(zio_t *zio)
80 vdev_ops_t vdev_missing_ops = {
84 vdev_missing_io_start,
87 VDEV_TYPE_MISSING, /* name of this vdev type */
88 B_TRUE /* leaf vdev */