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83e9986f6e
Creating virtual machines that have their rootfs on ZFS on hosts that
have their rootfs on ZFS causes SPA namespace collisions when the
standard name rpool is used. The solution is either to give each guest
pool a name unique to the host, which is not always desireable, or boot
a VM environment containing an ISO image to install it, which is
cumbersome.
26b42f3f9d introduced `zpool import -t
...` to simplify situations where a host must access a guest's pool when
there is a SPA namespace conflict. We build upon that to introduce
`zpool import -t tname ...`. That allows us to create a pool whose
in-core name is tname, but whose on-disk name is the normal name
specified.
This simplifies the creation of machine images that use a rootfs on ZFS.
That benefits not only real world deployments, but also ZFSOnLinux
development by decreasing the time needed to perform rootfs on ZFS
experiments.
Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2417
259 lines
7.7 KiB
C
259 lines
7.7 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
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* Copyright (c) 2012, 2014 by Delphix. All rights reserved.
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*/
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#include <sys/zio.h>
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#include <sys/spa.h>
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#include <sys/zfs_acl.h>
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#include <sys/zfs_ioctl.h>
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#include <sys/fs/zfs.h>
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#include "zfs_prop.h"
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#if defined(_KERNEL)
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#include <sys/systm.h>
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#else
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#endif
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static zprop_desc_t zpool_prop_table[ZPOOL_NUM_PROPS];
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zprop_desc_t *
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zpool_prop_get_table(void)
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{
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return (zpool_prop_table);
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}
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void
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zpool_prop_init(void)
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{
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static zprop_index_t boolean_table[] = {
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{ "off", 0},
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{ "on", 1},
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{ NULL }
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};
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static zprop_index_t failuremode_table[] = {
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{ "wait", ZIO_FAILURE_MODE_WAIT },
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{ "continue", ZIO_FAILURE_MODE_CONTINUE },
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{ "panic", ZIO_FAILURE_MODE_PANIC },
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{ NULL }
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};
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/* string properties */
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zprop_register_string(ZPOOL_PROP_ALTROOT, "altroot", NULL, PROP_DEFAULT,
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ZFS_TYPE_POOL, "<path>", "ALTROOT");
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zprop_register_string(ZPOOL_PROP_BOOTFS, "bootfs", NULL, PROP_DEFAULT,
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ZFS_TYPE_POOL, "<filesystem>", "BOOTFS");
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zprop_register_string(ZPOOL_PROP_CACHEFILE, "cachefile", NULL,
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PROP_DEFAULT, ZFS_TYPE_POOL, "<file> | none", "CACHEFILE");
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zprop_register_string(ZPOOL_PROP_COMMENT, "comment", NULL,
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PROP_DEFAULT, ZFS_TYPE_POOL, "<comment-string>", "COMMENT");
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/* readonly number properties */
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zprop_register_number(ZPOOL_PROP_SIZE, "size", 0, PROP_READONLY,
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ZFS_TYPE_POOL, "<size>", "SIZE");
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zprop_register_number(ZPOOL_PROP_FREE, "free", 0, PROP_READONLY,
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ZFS_TYPE_POOL, "<size>", "FREE");
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zprop_register_number(ZPOOL_PROP_FREEING, "freeing", 0, PROP_READONLY,
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ZFS_TYPE_POOL, "<size>", "FREEING");
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zprop_register_number(ZPOOL_PROP_LEAKED, "leaked", 0, PROP_READONLY,
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ZFS_TYPE_POOL, "<size>", "LEAKED");
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zprop_register_number(ZPOOL_PROP_ALLOCATED, "allocated", 0,
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PROP_READONLY, ZFS_TYPE_POOL, "<size>", "ALLOC");
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zprop_register_number(ZPOOL_PROP_EXPANDSZ, "expandsize", 0,
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PROP_READONLY, ZFS_TYPE_POOL, "<size>", "EXPANDSZ");
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zprop_register_number(ZPOOL_PROP_FRAGMENTATION, "fragmentation", 0,
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PROP_READONLY, ZFS_TYPE_POOL, "<percent>", "FRAG");
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zprop_register_number(ZPOOL_PROP_CAPACITY, "capacity", 0, PROP_READONLY,
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ZFS_TYPE_POOL, "<size>", "CAP");
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zprop_register_number(ZPOOL_PROP_GUID, "guid", 0, PROP_READONLY,
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ZFS_TYPE_POOL, "<guid>", "GUID");
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zprop_register_number(ZPOOL_PROP_HEALTH, "health", 0, PROP_READONLY,
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ZFS_TYPE_POOL, "<state>", "HEALTH");
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zprop_register_number(ZPOOL_PROP_DEDUPRATIO, "dedupratio", 0,
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PROP_READONLY, ZFS_TYPE_POOL, "<1.00x or higher if deduped>",
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"DEDUP");
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/* readonly onetime number properties */
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zprop_register_number(ZPOOL_PROP_ASHIFT, "ashift", 0, PROP_ONETIME,
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ZFS_TYPE_POOL, "<ashift, 9-13, or 0=default>", "ASHIFT");
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/* default number properties */
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zprop_register_number(ZPOOL_PROP_VERSION, "version", SPA_VERSION,
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PROP_DEFAULT, ZFS_TYPE_POOL, "<version>", "VERSION");
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zprop_register_number(ZPOOL_PROP_DEDUPDITTO, "dedupditto", 0,
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PROP_DEFAULT, ZFS_TYPE_POOL, "<threshold (min 100)>", "DEDUPDITTO");
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/* default index (boolean) properties */
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zprop_register_index(ZPOOL_PROP_DELEGATION, "delegation", 1,
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PROP_DEFAULT, ZFS_TYPE_POOL, "on | off", "DELEGATION",
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boolean_table);
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zprop_register_index(ZPOOL_PROP_AUTOREPLACE, "autoreplace", 0,
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PROP_DEFAULT, ZFS_TYPE_POOL, "on | off", "REPLACE", boolean_table);
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zprop_register_index(ZPOOL_PROP_LISTSNAPS, "listsnapshots", 0,
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PROP_DEFAULT, ZFS_TYPE_POOL, "on | off", "LISTSNAPS",
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boolean_table);
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zprop_register_index(ZPOOL_PROP_AUTOEXPAND, "autoexpand", 0,
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PROP_DEFAULT, ZFS_TYPE_POOL, "on | off", "EXPAND", boolean_table);
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zprop_register_index(ZPOOL_PROP_READONLY, "readonly", 0,
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PROP_DEFAULT, ZFS_TYPE_POOL, "on | off", "RDONLY", boolean_table);
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/* default index properties */
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zprop_register_index(ZPOOL_PROP_FAILUREMODE, "failmode",
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ZIO_FAILURE_MODE_WAIT, PROP_DEFAULT, ZFS_TYPE_POOL,
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"wait | continue | panic", "FAILMODE", failuremode_table);
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/* hidden properties */
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zprop_register_hidden(ZPOOL_PROP_NAME, "name", PROP_TYPE_STRING,
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PROP_READONLY, ZFS_TYPE_POOL, "NAME");
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zprop_register_hidden(ZPOOL_PROP_TNAME, "tname", PROP_TYPE_STRING,
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PROP_ONETIME, ZFS_TYPE_POOL, "TNAME");
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}
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/*
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* Given a property name and its type, returns the corresponding property ID.
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*/
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zpool_prop_t
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zpool_name_to_prop(const char *propname)
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{
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return (zprop_name_to_prop(propname, ZFS_TYPE_POOL));
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}
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/*
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* Given a pool property ID, returns the corresponding name.
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* Assuming the pool propety ID is valid.
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*/
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const char *
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zpool_prop_to_name(zpool_prop_t prop)
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{
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return (zpool_prop_table[prop].pd_name);
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}
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zprop_type_t
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zpool_prop_get_type(zpool_prop_t prop)
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{
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return (zpool_prop_table[prop].pd_proptype);
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}
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boolean_t
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zpool_prop_readonly(zpool_prop_t prop)
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{
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return (zpool_prop_table[prop].pd_attr == PROP_READONLY);
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}
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const char *
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zpool_prop_default_string(zpool_prop_t prop)
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{
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return (zpool_prop_table[prop].pd_strdefault);
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}
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uint64_t
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zpool_prop_default_numeric(zpool_prop_t prop)
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{
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return (zpool_prop_table[prop].pd_numdefault);
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}
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/*
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* Returns true if this is a valid feature@ property.
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*/
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boolean_t
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zpool_prop_feature(const char *name)
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{
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static const char *prefix = "feature@";
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return (strncmp(name, prefix, strlen(prefix)) == 0);
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}
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/*
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* Returns true if this is a valid unsupported@ property.
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*/
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boolean_t
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zpool_prop_unsupported(const char *name)
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{
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static const char *prefix = "unsupported@";
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return (strncmp(name, prefix, strlen(prefix)) == 0);
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}
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int
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zpool_prop_string_to_index(zpool_prop_t prop, const char *string,
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uint64_t *index)
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{
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return (zprop_string_to_index(prop, string, index, ZFS_TYPE_POOL));
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}
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int
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zpool_prop_index_to_string(zpool_prop_t prop, uint64_t index,
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const char **string)
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{
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return (zprop_index_to_string(prop, index, string, ZFS_TYPE_POOL));
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}
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uint64_t
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zpool_prop_random_value(zpool_prop_t prop, uint64_t seed)
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{
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return (zprop_random_value(prop, seed, ZFS_TYPE_POOL));
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}
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#ifndef _KERNEL
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const char *
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zpool_prop_values(zpool_prop_t prop)
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{
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return (zpool_prop_table[prop].pd_values);
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}
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const char *
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zpool_prop_column_name(zpool_prop_t prop)
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{
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return (zpool_prop_table[prop].pd_colname);
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}
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boolean_t
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zpool_prop_align_right(zpool_prop_t prop)
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{
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return (zpool_prop_table[prop].pd_rightalign);
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}
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#endif
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#if defined(_KERNEL) && defined(HAVE_SPL)
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/* zpool property functions */
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EXPORT_SYMBOL(zpool_prop_init);
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EXPORT_SYMBOL(zpool_prop_get_type);
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EXPORT_SYMBOL(zpool_prop_get_table);
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/* Pool property functions shared between libzfs and kernel. */
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EXPORT_SYMBOL(zpool_name_to_prop);
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EXPORT_SYMBOL(zpool_prop_to_name);
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EXPORT_SYMBOL(zpool_prop_default_string);
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EXPORT_SYMBOL(zpool_prop_default_numeric);
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EXPORT_SYMBOL(zpool_prop_readonly);
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EXPORT_SYMBOL(zpool_prop_feature);
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EXPORT_SYMBOL(zpool_prop_unsupported);
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EXPORT_SYMBOL(zpool_prop_index_to_string);
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EXPORT_SYMBOL(zpool_prop_string_to_index);
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#endif
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