| /* |
| * CDDL HEADER START |
| * |
| * The contents of this file are subject to the terms of the |
| * Common Development and Distribution License (the "License"). |
| * You may not use this file except in compliance with the License. |
| * |
| * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
| * or http://www.opensolaris.org/os/licensing. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * |
| * When distributing Covered Code, include this CDDL HEADER in each |
| * file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
| * If applicable, add the following below this CDDL HEADER, with the |
| * fields enclosed by brackets "[]" replaced with your own identifying |
| * information: Portions Copyright [yyyy] [name of copyright owner] |
| * |
| * CDDL HEADER END |
| */ |
| /* |
| * Copyright 2010 Sun Microsystems, Inc. All rights reserved. |
| * Use is subject to license terms. |
| */ |
| |
| /* |
| * Copyright (c) 2012, 2016 by Delphix. All rights reserved. |
| */ |
| |
| /* |
| * The 'missing' vdev is a special vdev type used only during import. It |
| * signifies a placeholder in the root vdev for some vdev that we know is |
| * missing. We pass it down to the kernel to allow the rest of the |
| * configuration to parsed and an attempt made to open all available devices. |
| * Because its GUID is always 0, we know that the guid sum will mismatch and we |
| * won't be able to open the pool anyway. |
| */ |
| |
| #include <sys/zfs_context.h> |
| #include <sys/spa.h> |
| #include <sys/vdev_impl.h> |
| #include <sys/fs/zfs.h> |
| #include <sys/zio.h> |
| |
| /* ARGSUSED */ |
| static int |
| vdev_missing_open(vdev_t *vd, uint64_t *psize, uint64_t *max_psize, |
| uint64_t *ashift) |
| { |
| /* |
| * Really this should just fail. But then the root vdev will be in the |
| * faulted state with VDEV_AUX_NO_REPLICAS, when what we really want is |
| * VDEV_AUX_BAD_GUID_SUM. So we pretend to succeed, knowing that we |
| * will fail the GUID sum check before ever trying to open the pool. |
| */ |
| *psize = 0; |
| *max_psize = 0; |
| *ashift = 0; |
| return (0); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| vdev_missing_close(vdev_t *vd) |
| { |
| } |
| |
| /* ARGSUSED */ |
| static void |
| vdev_missing_io_start(zio_t *zio) |
| { |
| zio->io_error = SET_ERROR(ENOTSUP); |
| zio_execute(zio); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| vdev_missing_io_done(zio_t *zio) |
| { |
| } |
| |
| vdev_ops_t vdev_missing_ops = { |
| .vdev_op_open = vdev_missing_open, |
| .vdev_op_close = vdev_missing_close, |
| .vdev_op_asize = vdev_default_asize, |
| .vdev_op_io_start = vdev_missing_io_start, |
| .vdev_op_io_done = vdev_missing_io_done, |
| .vdev_op_state_change = NULL, |
| .vdev_op_need_resilver = NULL, |
| .vdev_op_hold = NULL, |
| .vdev_op_rele = NULL, |
| .vdev_op_remap = NULL, |
| .vdev_op_xlate = NULL, |
| .vdev_op_type = VDEV_TYPE_MISSING, /* name of this vdev type */ |
| .vdev_op_leaf = B_TRUE /* leaf vdev */ |
| }; |
| |
| vdev_ops_t vdev_hole_ops = { |
| .vdev_op_open = vdev_missing_open, |
| .vdev_op_close = vdev_missing_close, |
| .vdev_op_asize = vdev_default_asize, |
| .vdev_op_io_start = vdev_missing_io_start, |
| .vdev_op_io_done = vdev_missing_io_done, |
| .vdev_op_state_change = NULL, |
| .vdev_op_need_resilver = NULL, |
| .vdev_op_hold = NULL, |
| .vdev_op_rele = NULL, |
| .vdev_op_remap = NULL, |
| .vdev_op_xlate = NULL, |
| .vdev_op_type = VDEV_TYPE_HOLE, /* name of this vdev type */ |
| .vdev_op_leaf = B_TRUE /* leaf vdev */ |
| }; |