4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
27 * Copyright (c) 2012, 2016 by Delphix. All rights reserved.
28 * Copyright 2019 Joyent, Inc.
32 * The 'missing' vdev is a special vdev type used only during import. It
33 * signifies a placeholder in the root vdev for some vdev that we know is
34 * missing. We pass it down to the kernel to allow the rest of the
35 * configuration to parsed and an attempt made to open all available devices.
36 * Because its GUID is always 0, we know that the guid sum will mismatch and we
37 * won't be able to open the pool anyway.
40 #include <sys/zfs_context.h>
42 #include <sys/vdev_impl.h>
43 #include <sys/fs/zfs.h>
48 vdev_missing_open(vdev_t
*vd
, uint64_t *psize
, uint64_t *max_psize
,
52 * Really this should just fail. But then the root vdev will be in the
53 * faulted state with VDEV_AUX_NO_REPLICAS, when what we really want is
54 * VDEV_AUX_BAD_GUID_SUM. So we pretend to succeed, knowing that we
55 * will fail the GUID sum check before ever trying to open the pool.
65 vdev_missing_close(vdev_t
*vd
)
71 vdev_missing_io_start(zio_t
*zio
)
73 zio
->io_error
= SET_ERROR(ENOTSUP
);
79 vdev_missing_io_done(zio_t
*zio
)
83 vdev_ops_t vdev_missing_ops
= {
84 .vdev_op_open
= vdev_missing_open
,
85 .vdev_op_close
= vdev_missing_close
,
86 .vdev_op_asize
= vdev_default_asize
,
87 .vdev_op_io_start
= vdev_missing_io_start
,
88 .vdev_op_io_done
= vdev_missing_io_done
,
89 .vdev_op_state_change
= NULL
,
90 .vdev_op_need_resilver
= NULL
,
93 .vdev_op_remap
= NULL
,
94 .vdev_op_xlate
= NULL
,
95 .vdev_op_dumpio
= NULL
,
96 .vdev_op_type
= VDEV_TYPE_MISSING
, /* name of this vdev type */
97 .vdev_op_leaf
= B_TRUE
/* leaf vdev */
100 vdev_ops_t vdev_hole_ops
= {
101 .vdev_op_open
= vdev_missing_open
,
102 .vdev_op_close
= vdev_missing_close
,
103 .vdev_op_asize
= vdev_default_asize
,
104 .vdev_op_io_start
= vdev_missing_io_start
,
105 .vdev_op_io_done
= vdev_missing_io_done
,
106 .vdev_op_state_change
= NULL
,
107 .vdev_op_need_resilver
= NULL
,
108 .vdev_op_hold
= NULL
,
109 .vdev_op_rele
= NULL
,
110 .vdev_op_remap
= NULL
,
111 .vdev_op_xlate
= NULL
,
112 .vdev_op_dumpio
= NULL
,
113 .vdev_op_type
= VDEV_TYPE_HOLE
, /* name of this vdev type */
114 .vdev_op_leaf
= B_TRUE
/* leaf vdev */