619f097693
PROBLEM ======== The first access to a block incurs a performance penalty on some platforms (e.g. AWS's EBS, VMware VMDKs). Therefore we recommend that volumes are "thick provisioned", where supported by the platform (VMware). This can create a large delay in getting a new virtual machines up and running (or adding storage to an existing Engine). If the thick provision step is omitted, write performance will be suboptimal until all blocks on the LUN have been written. SOLUTION ========= This feature introduces a way to 'initialize' the disks at install or in the background to make sure we don't incur this first read penalty. When an entire LUN is added to ZFS, we make all space available immediately, and allow ZFS to find unallocated space and zero it out. This works with concurrent writes to arbitrary offsets, ensuring that we don't zero out something that has been (or is in the middle of being) written. This scheme can also be applied to existing pools (affecting only free regions on the vdev). Detailed design: - new subcommand:zpool initialize [-cs] <pool> [<vdev> ...] - start, suspend, or cancel initialization - Creates new open-context thread for each vdev - Thread iterates through all metaslabs in this vdev - Each metaslab: - select a metaslab - load the metaslab - mark the metaslab as being zeroed - walk all free ranges within that metaslab and translate them to ranges on the leaf vdev - issue a "zeroing" I/O on the leaf vdev that corresponds to a free range on the metaslab we're working on - continue until all free ranges for this metaslab have been "zeroed" - reset/unmark the metaslab being zeroed - if more metaslabs exist, then repeat above tasks. - if no more metaslabs, then we're done. - progress for the initialization is stored on-disk in the vdev’s leaf zap object. The following information is stored: - the last offset that has been initialized - the state of the initialization process (i.e. active, suspended, or canceled) - the start time for the initialization - progress is reported via the zpool status command and shows information for each of the vdevs that are initializing Porting notes: - Added zfs_initialize_value module parameter to set the pattern written by "zpool initialize". - Added zfs_vdev_{initializing,removal}_{min,max}_active module options. Authored by: George Wilson <george.wilson@delphix.com> Reviewed by: John Wren Kennedy <john.kennedy@delphix.com> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com> Reviewed by: Prakash Surya <prakash.surya@delphix.com> Reviewed by: loli10K <ezomori.nozomu@gmail.com> Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov> Approved by: Richard Lowe <richlowe@richlowe.net> Signed-off-by: Tim Chase <tim@chase2k.com> Ported-by: Tim Chase <tim@chase2k.com> OpenZFS-issue: https://www.illumos.org/issues/9102 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/c3963210eb Closes #8230
631 lines
16 KiB
C
631 lines
16 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) 2018 by Delphix. All rights reserved.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/zfeature.h>
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#include <sys/zfs_ioctl.h>
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#include <sys/zfs_sysfs.h>
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#include <sys/kmem.h>
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#include <sys/fs/zfs.h>
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#include <linux/kobject.h>
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#include "zfs_prop.h"
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#if !defined(_KERNEL)
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#error kernel builds only
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#endif
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/*
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* ZFS Module sysfs support
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*
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* This extends our sysfs '/sys/module/zfs' entry to include feature
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* and property attributes. The primary consumer of this information
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* is user processes, like the zfs CLI, that need to know what the
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* current loaded ZFS module supports. The libzfs binary will consult
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* this information when instantiating the zfs|zpool property tables
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* and the pool features table.
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*
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* The added top-level directories are:
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* /sys/module/zfs
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* ├── features.kernel
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* ├── features.pool
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* ├── properties.dataset
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* └── properties.pool
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*
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* The local interface for the zfs kobjects includes:
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* zfs_kobj_init()
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* zfs_kobj_add()
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* zfs_kobj_release()
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* zfs_kobj_add_attr()
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* zfs_kobj_fini()
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*/
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/*
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* A zfs_mod_kobj_t represents a zfs kobject under '/sys/module/zfs'
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*/
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struct zfs_mod_kobj;
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typedef struct zfs_mod_kobj zfs_mod_kobj_t;
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struct zfs_mod_kobj {
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struct kobject zko_kobj;
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struct kobj_type zko_kobj_type;
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struct sysfs_ops zko_sysfs_ops;
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size_t zko_attr_count;
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struct attribute *zko_attr_list; /* allocated */
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struct attribute **zko_default_attrs; /* allocated */
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size_t zko_child_count;
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zfs_mod_kobj_t *zko_children; /* allocated */
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};
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#define ATTR_TABLE_SIZE(cnt) (sizeof (struct attribute) * (cnt))
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/* Note +1 for NULL terminator slot */
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#define DEFAULT_ATTR_SIZE(cnt) (sizeof (struct attribute *) * (cnt + 1))
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#define CHILD_TABLE_SIZE(cnt) (sizeof (zfs_mod_kobj_t) * (cnt))
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/*
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* These are the top-level kobjects under '/sys/module/zfs/'
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*/
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static zfs_mod_kobj_t kernel_features_kobj;
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static zfs_mod_kobj_t pool_features_kobj;
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static zfs_mod_kobj_t dataset_props_kobj;
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static zfs_mod_kobj_t pool_props_kobj;
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/*
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* The show function is used to provide the content
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* of an attribute into a PAGE_SIZE buffer.
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*/
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typedef ssize_t (*sysfs_show_func)(struct kobject *, struct attribute *,
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char *);
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static void
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zfs_kobj_fini(zfs_mod_kobj_t *zkobj)
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{
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/* finalize any child kobjects */
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if (zkobj->zko_child_count != 0) {
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ASSERT(zkobj->zko_children);
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for (int i = 0; i < zkobj->zko_child_count; i++)
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zfs_kobj_fini(&zkobj->zko_children[i]);
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}
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/* kobject_put() will call zfs_kobj_release() to release memory */
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kobject_del(&zkobj->zko_kobj);
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kobject_put(&zkobj->zko_kobj);
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}
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static void
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zfs_kobj_release(struct kobject *kobj)
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{
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zfs_mod_kobj_t *zkobj = container_of(kobj, zfs_mod_kobj_t, zko_kobj);
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if (zkobj->zko_attr_list != NULL) {
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ASSERT3S(zkobj->zko_attr_count, !=, 0);
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kmem_free(zkobj->zko_attr_list,
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ATTR_TABLE_SIZE(zkobj->zko_attr_count));
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zkobj->zko_attr_list = NULL;
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}
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if (zkobj->zko_default_attrs != NULL) {
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kmem_free(zkobj->zko_default_attrs,
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DEFAULT_ATTR_SIZE(zkobj->zko_attr_count));
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zkobj->zko_default_attrs = NULL;
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}
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if (zkobj->zko_child_count != 0) {
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ASSERT(zkobj->zko_children);
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kmem_free(zkobj->zko_children,
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CHILD_TABLE_SIZE(zkobj->zko_child_count));
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zkobj->zko_child_count = 0;
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zkobj->zko_children = NULL;
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}
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zkobj->zko_attr_count = 0;
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}
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static void
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zfs_kobj_add_attr(zfs_mod_kobj_t *zkobj, int attr_num, const char *attr_name)
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{
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VERIFY3U(attr_num, <, zkobj->zko_attr_count);
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ASSERT(zkobj->zko_attr_list);
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ASSERT(zkobj->zko_default_attrs);
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zkobj->zko_attr_list[attr_num].name = attr_name;
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zkobj->zko_attr_list[attr_num].mode = 0444;
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zkobj->zko_default_attrs[attr_num] = &zkobj->zko_attr_list[attr_num];
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}
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static int
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zfs_kobj_init(zfs_mod_kobj_t *zkobj, int attr_cnt, int child_cnt,
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sysfs_show_func show_func)
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{
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/*
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* Initialize object's attributes. Count can be zero.
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*/
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if (attr_cnt > 0) {
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zkobj->zko_attr_list = kmem_zalloc(ATTR_TABLE_SIZE(attr_cnt),
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KM_SLEEP);
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if (zkobj->zko_attr_list == NULL)
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return (ENOMEM);
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}
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/* this will always have at least one slot for NULL termination */
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zkobj->zko_default_attrs = kmem_zalloc(DEFAULT_ATTR_SIZE(attr_cnt),
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KM_SLEEP);
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if (zkobj->zko_default_attrs == NULL) {
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if (zkobj->zko_attr_list != NULL) {
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kmem_free(zkobj->zko_attr_list,
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ATTR_TABLE_SIZE(attr_cnt));
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}
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return (ENOMEM);
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}
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zkobj->zko_attr_count = attr_cnt;
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zkobj->zko_kobj_type.default_attrs = zkobj->zko_default_attrs;
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if (child_cnt > 0) {
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zkobj->zko_children = kmem_zalloc(CHILD_TABLE_SIZE(child_cnt),
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KM_SLEEP);
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if (zkobj->zko_children == NULL) {
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if (zkobj->zko_default_attrs != NULL) {
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kmem_free(zkobj->zko_default_attrs,
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DEFAULT_ATTR_SIZE(attr_cnt));
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}
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if (zkobj->zko_attr_list != NULL) {
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kmem_free(zkobj->zko_attr_list,
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ATTR_TABLE_SIZE(attr_cnt));
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}
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return (ENOMEM);
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}
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zkobj->zko_child_count = child_cnt;
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}
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zkobj->zko_sysfs_ops.show = show_func;
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zkobj->zko_kobj_type.sysfs_ops = &zkobj->zko_sysfs_ops;
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zkobj->zko_kobj_type.release = zfs_kobj_release;
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return (0);
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}
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static int
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zfs_kobj_add(zfs_mod_kobj_t *zkobj, struct kobject *parent, const char *name)
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{
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/* zko_default_attrs must be NULL terminated */
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ASSERT(zkobj->zko_default_attrs != NULL);
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ASSERT(zkobj->zko_default_attrs[zkobj->zko_attr_count] == NULL);
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kobject_init(&zkobj->zko_kobj, &zkobj->zko_kobj_type);
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return (kobject_add(&zkobj->zko_kobj, parent, name));
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}
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/*
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* Each zfs property has these common attributes
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*/
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static const char *zprop_attrs[] = {
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"type",
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"readonly",
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"setonce",
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"visible",
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"values",
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"default",
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"datasets" /* zfs properties only */
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};
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#define ZFS_PROP_ATTR_COUNT ARRAY_SIZE(zprop_attrs)
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#define ZPOOL_PROP_ATTR_COUNT (ZFS_PROP_ATTR_COUNT - 1)
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static const char *zprop_types[] = {
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"number",
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"string",
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"index",
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};
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typedef struct zfs_type_map {
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zfs_type_t ztm_type;
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const char *ztm_name;
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} zfs_type_map_t;
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static zfs_type_map_t type_map[] = {
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{ZFS_TYPE_FILESYSTEM, "filesystem"},
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{ZFS_TYPE_SNAPSHOT, "snapshot"},
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{ZFS_TYPE_VOLUME, "volume"},
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{ZFS_TYPE_BOOKMARK, "bookmark"}
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};
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/*
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* Show the content for a zfs property attribute
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*/
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static ssize_t
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zprop_sysfs_show(const char *attr_name, const zprop_desc_t *property,
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char *buf, size_t buflen)
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{
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const char *show_str;
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/* For dataset properties list the dataset types that apply */
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if (strcmp(attr_name, "datasets") == 0 &&
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property->pd_types != ZFS_TYPE_POOL) {
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int len = 0;
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for (int i = 0; i < ARRAY_SIZE(type_map); i++) {
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if (type_map[i].ztm_type & property->pd_types) {
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len += snprintf(buf + len, buflen - len, "%s ",
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type_map[i].ztm_name);
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}
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}
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len += snprintf(buf + len, buflen - len, "\n");
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return (len);
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}
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if (strcmp(attr_name, "type") == 0) {
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show_str = zprop_types[property->pd_proptype];
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} else if (strcmp(attr_name, "readonly") == 0) {
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show_str = property->pd_attr == PROP_READONLY ? "1" : "0";
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} else if (strcmp(attr_name, "setonce") == 0) {
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show_str = property->pd_attr == PROP_ONETIME ? "1" : "0";
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} else if (strcmp(attr_name, "visible") == 0) {
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show_str = property->pd_visible ? "1" : "0";
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} else if (strcmp(attr_name, "values") == 0) {
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show_str = property->pd_values ? property->pd_values : "";
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} else if (strcmp(attr_name, "default") == 0) {
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char number[32];
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switch (property->pd_proptype) {
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case PROP_TYPE_NUMBER:
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(void) snprintf(number, sizeof (number), "%llu",
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(u_longlong_t)property->pd_numdefault);
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show_str = number;
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break;
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case PROP_TYPE_STRING:
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show_str = property->pd_strdefault ?
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property->pd_strdefault : "";
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break;
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case PROP_TYPE_INDEX:
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if (zprop_index_to_string(property->pd_propnum,
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property->pd_numdefault, &show_str,
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property->pd_types) != 0) {
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show_str = "";
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}
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break;
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default:
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return (0);
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}
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} else {
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return (0);
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}
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return (snprintf(buf, buflen, "%s\n", show_str));
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}
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static ssize_t
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dataset_property_show(struct kobject *kobj, struct attribute *attr, char *buf)
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{
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zfs_prop_t prop = zfs_name_to_prop(kobject_name(kobj));
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zprop_desc_t *prop_tbl = zfs_prop_get_table();
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ssize_t len;
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ASSERT3U(prop, <, ZFS_NUM_PROPS);
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len = zprop_sysfs_show(attr->name, &prop_tbl[prop], buf, PAGE_SIZE);
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return (len);
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}
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static ssize_t
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pool_property_show(struct kobject *kobj, struct attribute *attr, char *buf)
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{
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zpool_prop_t prop = zpool_name_to_prop(kobject_name(kobj));
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zprop_desc_t *prop_tbl = zpool_prop_get_table();
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ssize_t len;
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ASSERT3U(prop, <, ZPOOL_NUM_PROPS);
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len = zprop_sysfs_show(attr->name, &prop_tbl[prop], buf, PAGE_SIZE);
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return (len);
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}
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/*
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* ZFS kernel feature attributes for '/sys/module/zfs/features.kernel'
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*
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* This list is intended for kernel features that don't have a pool feature
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* association or that extend existing user kernel interfaces.
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*
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* A user processes can easily check if the running zfs kernel module
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* supports the new feature.
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*
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* For example, the initial channel_program feature was extended to support
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* async calls (i.e. a sync flag). If this mechanism were in place at that
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* time, we could have added a 'channel_program_async' to this list.
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*/
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static const char *zfs_features[] = {
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/* --> Add new kernel features here (post ZoL 0.8.0) */
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"vdev_initialize"
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};
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#define ZFS_FEATURE_COUNT ARRAY_SIZE(zfs_features)
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static ssize_t
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kernel_feature_show(struct kobject *kobj, struct attribute *attr, char *buf)
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{
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return (snprintf(buf, PAGE_SIZE, "supported\n"));
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}
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static int
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zfs_kernel_features_init(zfs_mod_kobj_t *zfs_kobj, struct kobject *parent)
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{
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int err;
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err = zfs_kobj_init(zfs_kobj, ZFS_FEATURE_COUNT, 0,
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kernel_feature_show);
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if (err)
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return (err);
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for (int f = 0; f < ZFS_FEATURE_COUNT; f++)
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zfs_kobj_add_attr(zfs_kobj, f, zfs_features[f]);
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err = zfs_kobj_add(zfs_kobj, parent, ZFS_SYSFS_KERNEL_FEATURES);
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if (err)
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zfs_kobj_release(&zfs_kobj->zko_kobj);
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return (err);
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}
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/*
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* Each pool feature has these common attributes
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*/
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static const char *pool_feature_attrs[] = {
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"description",
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"guid",
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"uname",
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"readonly_compatible",
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"required_for_mos",
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"activate_on_enable",
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"per_dataset"
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};
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#define ZPOOL_FEATURE_ATTR_COUNT ARRAY_SIZE(pool_feature_attrs)
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/*
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* Show the content for the given zfs pool feature attribute
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*/
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static ssize_t
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pool_feature_show(struct kobject *kobj, struct attribute *attr, char *buf)
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{
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spa_feature_t fid;
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if (zfeature_lookup_guid(kobject_name(kobj), &fid) != 0)
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return (0);
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ASSERT3U(fid, <, SPA_FEATURES);
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zfeature_flags_t flags = spa_feature_table[fid].fi_flags;
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const char *show_str = NULL;
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if (strcmp(attr->name, "description") == 0) {
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show_str = spa_feature_table[fid].fi_desc;
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} else if (strcmp(attr->name, "guid") == 0) {
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show_str = spa_feature_table[fid].fi_guid;
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} else if (strcmp(attr->name, "uname") == 0) {
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show_str = spa_feature_table[fid].fi_uname;
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} else if (strcmp(attr->name, "readonly_compatible") == 0) {
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show_str = flags & ZFEATURE_FLAG_READONLY_COMPAT ? "1" : "0";
|
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} else if (strcmp(attr->name, "required_for_mos") == 0) {
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show_str = flags & ZFEATURE_FLAG_MOS ? "1" : "0";
|
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} else if (strcmp(attr->name, "activate_on_enable") == 0) {
|
|
show_str = flags & ZFEATURE_FLAG_ACTIVATE_ON_ENABLE ? "1" : "0";
|
|
} else if (strcmp(attr->name, "per_dataset") == 0) {
|
|
show_str = flags & ZFEATURE_FLAG_PER_DATASET ? "1" : "0";
|
|
}
|
|
if (show_str == NULL)
|
|
return (0);
|
|
|
|
return (snprintf(buf, PAGE_SIZE, "%s\n", show_str));
|
|
}
|
|
|
|
static void
|
|
pool_feature_to_kobj(zfs_mod_kobj_t *parent, spa_feature_t fid,
|
|
const char *name)
|
|
{
|
|
zfs_mod_kobj_t *zfs_kobj = &parent->zko_children[fid];
|
|
|
|
ASSERT3U(fid, <, SPA_FEATURES);
|
|
ASSERT(name);
|
|
|
|
int err = zfs_kobj_init(zfs_kobj, ZPOOL_FEATURE_ATTR_COUNT, 0,
|
|
pool_feature_show);
|
|
if (err)
|
|
return;
|
|
|
|
for (int i = 0; i < ZPOOL_FEATURE_ATTR_COUNT; i++)
|
|
zfs_kobj_add_attr(zfs_kobj, i, pool_feature_attrs[i]);
|
|
|
|
err = zfs_kobj_add(zfs_kobj, &parent->zko_kobj, name);
|
|
if (err)
|
|
zfs_kobj_release(&zfs_kobj->zko_kobj);
|
|
}
|
|
|
|
static int
|
|
zfs_pool_features_init(zfs_mod_kobj_t *zfs_kobj, struct kobject *parent)
|
|
{
|
|
/*
|
|
* Create a parent kobject to host pool features.
|
|
*
|
|
* '/sys/module/zfs/features.pool'
|
|
*/
|
|
int err = zfs_kobj_init(zfs_kobj, 0, SPA_FEATURES, pool_feature_show);
|
|
if (err)
|
|
return (err);
|
|
err = zfs_kobj_add(zfs_kobj, parent, ZFS_SYSFS_POOL_FEATURES);
|
|
if (err) {
|
|
zfs_kobj_release(&zfs_kobj->zko_kobj);
|
|
return (err);
|
|
}
|
|
|
|
/*
|
|
* Now create a kobject for each feature.
|
|
*
|
|
* '/sys/module/zfs/features.pool/<feature>'
|
|
*/
|
|
for (spa_feature_t i = 0; i < SPA_FEATURES; i++)
|
|
pool_feature_to_kobj(zfs_kobj, i, spa_feature_table[i].fi_guid);
|
|
|
|
return (0);
|
|
}
|
|
|
|
typedef struct prop_to_kobj_arg {
|
|
zprop_desc_t *p2k_table;
|
|
zfs_mod_kobj_t *p2k_parent;
|
|
sysfs_show_func p2k_show_func;
|
|
int p2k_attr_count;
|
|
} prop_to_kobj_arg_t;
|
|
|
|
static int
|
|
zprop_to_kobj(int prop, void *args)
|
|
{
|
|
prop_to_kobj_arg_t *data = args;
|
|
zfs_mod_kobj_t *parent = data->p2k_parent;
|
|
zfs_mod_kobj_t *zfs_kobj = &parent->zko_children[prop];
|
|
const char *name = data->p2k_table[prop].pd_name;
|
|
int err;
|
|
|
|
ASSERT(name);
|
|
|
|
err = zfs_kobj_init(zfs_kobj, data->p2k_attr_count, 0,
|
|
data->p2k_show_func);
|
|
if (err)
|
|
return (ZPROP_CONT);
|
|
|
|
for (int i = 0; i < data->p2k_attr_count; i++)
|
|
zfs_kobj_add_attr(zfs_kobj, i, zprop_attrs[i]);
|
|
|
|
err = zfs_kobj_add(zfs_kobj, &parent->zko_kobj, name);
|
|
if (err)
|
|
zfs_kobj_release(&zfs_kobj->zko_kobj);
|
|
|
|
return (ZPROP_CONT);
|
|
}
|
|
|
|
static int
|
|
zfs_sysfs_properties_init(zfs_mod_kobj_t *zfs_kobj, struct kobject *parent,
|
|
zfs_type_t type)
|
|
{
|
|
prop_to_kobj_arg_t context;
|
|
const char *name;
|
|
int err;
|
|
|
|
/*
|
|
* Create a parent kobject to host properties.
|
|
*
|
|
* '/sys/module/zfs/properties.<type>'
|
|
*/
|
|
if (type == ZFS_TYPE_POOL) {
|
|
name = ZFS_SYSFS_POOL_PROPERTIES;
|
|
context.p2k_table = zpool_prop_get_table();
|
|
context.p2k_attr_count = ZPOOL_PROP_ATTR_COUNT;
|
|
context.p2k_parent = zfs_kobj;
|
|
context.p2k_show_func = pool_property_show;
|
|
err = zfs_kobj_init(zfs_kobj, 0, ZPOOL_NUM_PROPS,
|
|
pool_property_show);
|
|
} else {
|
|
name = ZFS_SYSFS_DATASET_PROPERTIES;
|
|
context.p2k_table = zfs_prop_get_table();
|
|
context.p2k_attr_count = ZFS_PROP_ATTR_COUNT;
|
|
context.p2k_parent = zfs_kobj;
|
|
context.p2k_show_func = dataset_property_show;
|
|
err = zfs_kobj_init(zfs_kobj, 0, ZFS_NUM_PROPS,
|
|
dataset_property_show);
|
|
}
|
|
|
|
if (err)
|
|
return (err);
|
|
|
|
err = zfs_kobj_add(zfs_kobj, parent, name);
|
|
if (err) {
|
|
zfs_kobj_release(&zfs_kobj->zko_kobj);
|
|
return (err);
|
|
}
|
|
|
|
/*
|
|
* Create a kobject for each property.
|
|
*
|
|
* '/sys/module/zfs/properties.<type>/<property>'
|
|
*/
|
|
(void) zprop_iter_common(zprop_to_kobj, &context, B_TRUE,
|
|
B_FALSE, type);
|
|
|
|
return (err);
|
|
}
|
|
|
|
void
|
|
zfs_sysfs_init(void)
|
|
{
|
|
struct kobject *parent;
|
|
#if defined(CONFIG_ZFS) && !defined(CONFIG_ZFS_MODULE)
|
|
parent = kobject_create_and_add("zfs", fs_kobj);
|
|
#else
|
|
parent = &(((struct module *)(THIS_MODULE))->mkobj).kobj;
|
|
#endif
|
|
int err;
|
|
|
|
if (parent == NULL)
|
|
return;
|
|
|
|
err = zfs_kernel_features_init(&kernel_features_kobj, parent);
|
|
if (err)
|
|
return;
|
|
|
|
err = zfs_pool_features_init(&pool_features_kobj, parent);
|
|
if (err) {
|
|
zfs_kobj_fini(&kernel_features_kobj);
|
|
return;
|
|
}
|
|
|
|
err = zfs_sysfs_properties_init(&pool_props_kobj, parent,
|
|
ZFS_TYPE_POOL);
|
|
if (err) {
|
|
zfs_kobj_fini(&kernel_features_kobj);
|
|
zfs_kobj_fini(&pool_features_kobj);
|
|
return;
|
|
}
|
|
|
|
err = zfs_sysfs_properties_init(&dataset_props_kobj, parent,
|
|
ZFS_TYPE_FILESYSTEM);
|
|
if (err) {
|
|
zfs_kobj_fini(&kernel_features_kobj);
|
|
zfs_kobj_fini(&pool_features_kobj);
|
|
zfs_kobj_fini(&pool_props_kobj);
|
|
return;
|
|
}
|
|
}
|
|
|
|
void
|
|
zfs_sysfs_fini(void)
|
|
{
|
|
/*
|
|
* Remove top-level kobjects; each will remove any children kobjects
|
|
*/
|
|
zfs_kobj_fini(&kernel_features_kobj);
|
|
zfs_kobj_fini(&pool_features_kobj);
|
|
zfs_kobj_fini(&dataset_props_kobj);
|
|
zfs_kobj_fini(&pool_props_kobj);
|
|
}
|