501 lines
14 KiB
C
501 lines
14 KiB
C
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/*
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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) 2011, 2018 by Delphix. All rights reserved.
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* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
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* Copyright (c) 2013, Joyent, Inc. All rights reserved.
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* Copyright (c) 2014, Nexenta Systems, Inc. All rights reserved.
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* Copyright (c) 2017, Intel Corporation.
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*/
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#ifndef _KERNEL
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#include <errno.h>
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#include <string.h>
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#include <sys/stat.h>
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#endif
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#include <sys/debug.h>
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#include <sys/fs/zfs.h>
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#include <sys/inttypes.h>
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#include <sys/types.h>
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#include <sys/zfs_sysfs.h>
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#include "zfeature_common.h"
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/*
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* Set to disable all feature checks while opening pools, allowing pools with
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* unsupported features to be opened. Set for testing only.
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*/
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boolean_t zfeature_checks_disable = B_FALSE;
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zfeature_info_t spa_feature_table[SPA_FEATURES];
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/*
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* Valid characters for feature guids. This list is mainly for aesthetic
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* purposes and could be expanded in the future. There are different allowed
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* characters in the guids reverse dns portion (before the colon) and its
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* short name (after the colon).
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*/
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static int
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valid_char(char c, boolean_t after_colon)
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{
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return ((c >= 'a' && c <= 'z') ||
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(c >= '0' && c <= '9') ||
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(after_colon && c == '_') ||
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(!after_colon && (c == '.' || c == '-')));
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}
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/*
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* Every feature guid must contain exactly one colon which separates a reverse
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* dns organization name from the feature's "short" name (e.g.
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* "com.company:feature_name").
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*/
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boolean_t
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zfeature_is_valid_guid(const char *name)
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{
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int i;
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boolean_t has_colon = B_FALSE;
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i = 0;
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while (name[i] != '\0') {
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char c = name[i++];
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if (c == ':') {
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if (has_colon)
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return (B_FALSE);
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has_colon = B_TRUE;
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continue;
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}
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if (!valid_char(c, has_colon))
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return (B_FALSE);
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}
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return (has_colon);
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}
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boolean_t
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zfeature_is_supported(const char *guid)
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{
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if (zfeature_checks_disable)
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return (B_TRUE);
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for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
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zfeature_info_t *feature = &spa_feature_table[i];
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if (strcmp(guid, feature->fi_guid) == 0)
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return (B_TRUE);
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}
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return (B_FALSE);
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}
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int
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zfeature_lookup_guid(const char *guid, spa_feature_t *res)
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{
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for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
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zfeature_info_t *feature = &spa_feature_table[i];
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if (!feature->fi_zfs_mod_supported)
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continue;
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if (strcmp(guid, feature->fi_guid) == 0) {
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if (res != NULL)
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*res = i;
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return (0);
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}
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}
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return (ENOENT);
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}
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int
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zfeature_lookup_name(const char *name, spa_feature_t *res)
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{
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for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
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zfeature_info_t *feature = &spa_feature_table[i];
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if (!feature->fi_zfs_mod_supported)
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continue;
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if (strcmp(name, feature->fi_uname) == 0) {
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if (res != NULL)
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*res = i;
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return (0);
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}
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}
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return (ENOENT);
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}
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boolean_t
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zfeature_depends_on(spa_feature_t fid, spa_feature_t check)
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{
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zfeature_info_t *feature = &spa_feature_table[fid];
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for (int i = 0; feature->fi_depends[i] != SPA_FEATURE_NONE; i++) {
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if (feature->fi_depends[i] == check)
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return (B_TRUE);
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}
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return (B_FALSE);
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}
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static boolean_t
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deps_contains_feature(const spa_feature_t *deps, const spa_feature_t feature)
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{
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for (int i = 0; deps[i] != SPA_FEATURE_NONE; i++)
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if (deps[i] == feature)
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return (B_TRUE);
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return (B_FALSE);
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}
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#if !defined(_KERNEL) && !defined(LIB_ZPOOL_BUILD)
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static boolean_t
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zfs_mod_supported_impl(const char *scope, const char *name, const char *sysfs)
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{
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boolean_t supported = B_FALSE;
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char *path;
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int len = asprintf(&path, "%s%s%s%s%s", sysfs,
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scope == NULL ? "" : "/", scope == NULL ? "" : scope,
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name == NULL ? "" : "/", name == NULL ? "" : name);
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if (len > 0) {
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struct stat64 statbuf;
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supported = !!(stat64(path, &statbuf) == 0);
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free(path);
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}
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return (supported);
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}
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boolean_t
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zfs_mod_supported(const char *scope, const char *name)
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{
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boolean_t supported;
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/*
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* Check both the primary and alternate sysfs locations to determine
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* if the required functionality is supported.
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*/
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supported = (zfs_mod_supported_impl(scope, name, ZFS_SYSFS_DIR) ||
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zfs_mod_supported_impl(scope, name, ZFS_SYSFS_ALT_DIR));
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/*
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* For backwards compatibility with kernel modules that predate
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* supported feature/property checking. Report the feature/property
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* as supported if the kernel module is loaded but the requested
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* scope directory does not exist.
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*/
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if (supported == B_FALSE) {
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struct stat64 statbuf;
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if ((stat64(ZFS_SYSFS_DIR, &statbuf) == 0) &&
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!zfs_mod_supported_impl(scope, NULL, ZFS_SYSFS_DIR) &&
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!zfs_mod_supported_impl(scope, NULL, ZFS_SYSFS_ALT_DIR)) {
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supported = B_TRUE;
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}
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}
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return (supported);
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}
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#endif
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static boolean_t
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zfs_mod_supported_feature(const char *name)
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{
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/*
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* The zfs module spa_feature_table[], whether in-kernel or in
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* libzpool, always supports all the features. libzfs needs to
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* query the running module, via sysfs, to determine which
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* features are supported.
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*/
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#if defined(_KERNEL) || defined(LIB_ZPOOL_BUILD)
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return (B_TRUE);
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#else
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return (zfs_mod_supported(ZFS_SYSFS_POOL_FEATURES, name));
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#endif
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}
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static void
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zfeature_register(spa_feature_t fid, const char *guid, const char *name,
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const char *desc, zfeature_flags_t flags, zfeature_type_t type,
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const spa_feature_t *deps)
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{
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zfeature_info_t *feature = &spa_feature_table[fid];
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static spa_feature_t nodeps[] = { SPA_FEATURE_NONE };
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ASSERT(name != NULL);
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ASSERT(desc != NULL);
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ASSERT((flags & ZFEATURE_FLAG_READONLY_COMPAT) == 0 ||
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(flags & ZFEATURE_FLAG_MOS) == 0);
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ASSERT3U(fid, <, SPA_FEATURES);
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ASSERT(zfeature_is_valid_guid(guid));
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if (deps == NULL)
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deps = nodeps;
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VERIFY(((flags & ZFEATURE_FLAG_PER_DATASET) == 0) ||
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(deps_contains_feature(deps, SPA_FEATURE_EXTENSIBLE_DATASET)));
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feature->fi_feature = fid;
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feature->fi_guid = guid;
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feature->fi_uname = name;
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feature->fi_desc = desc;
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feature->fi_flags = flags;
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feature->fi_type = type;
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feature->fi_depends = deps;
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feature->fi_zfs_mod_supported = zfs_mod_supported_feature(guid);
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}
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void
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zpool_feature_init(void)
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{
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zfeature_register(SPA_FEATURE_ASYNC_DESTROY,
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"com.delphix:async_destroy", "async_destroy",
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"Destroy filesystems asynchronously.",
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ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL);
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zfeature_register(SPA_FEATURE_EMPTY_BPOBJ,
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"com.delphix:empty_bpobj", "empty_bpobj",
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"Snapshots use less space.",
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ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL);
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zfeature_register(SPA_FEATURE_LZ4_COMPRESS,
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"org.illumos:lz4_compress", "lz4_compress",
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"LZ4 compression algorithm support.",
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ZFEATURE_FLAG_ACTIVATE_ON_ENABLE, ZFEATURE_TYPE_BOOLEAN, NULL);
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zfeature_register(SPA_FEATURE_MULTI_VDEV_CRASH_DUMP,
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"com.joyent:multi_vdev_crash_dump", "multi_vdev_crash_dump",
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"Crash dumps to multiple vdev pools.",
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0, ZFEATURE_TYPE_BOOLEAN, NULL);
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zfeature_register(SPA_FEATURE_SPACEMAP_HISTOGRAM,
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"com.delphix:spacemap_histogram", "spacemap_histogram",
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"Spacemaps maintain space histograms.",
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ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL);
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zfeature_register(SPA_FEATURE_ENABLED_TXG,
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"com.delphix:enabled_txg", "enabled_txg",
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"Record txg at which a feature is enabled",
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ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL);
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{
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static const spa_feature_t hole_birth_deps[] = {
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SPA_FEATURE_ENABLED_TXG,
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SPA_FEATURE_NONE
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};
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zfeature_register(SPA_FEATURE_HOLE_BIRTH,
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"com.delphix:hole_birth", "hole_birth",
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"Retain hole birth txg for more precise zfs send",
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ZFEATURE_FLAG_MOS | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
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ZFEATURE_TYPE_BOOLEAN, hole_birth_deps);
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}
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zfeature_register(SPA_FEATURE_POOL_CHECKPOINT,
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"com.delphix:zpool_checkpoint", "zpool_checkpoint",
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"Pool state can be checkpointed, allowing rewind later.",
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ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL);
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zfeature_register(SPA_FEATURE_SPACEMAP_V2,
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"com.delphix:spacemap_v2", "spacemap_v2",
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"Space maps representing large segments are more efficient.",
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ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
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ZFEATURE_TYPE_BOOLEAN, NULL);
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zfeature_register(SPA_FEATURE_EXTENSIBLE_DATASET,
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"com.delphix:extensible_dataset", "extensible_dataset",
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"Enhanced dataset functionality, used by other features.",
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0, ZFEATURE_TYPE_BOOLEAN, NULL);
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{
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static const spa_feature_t bookmarks_deps[] = {
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SPA_FEATURE_EXTENSIBLE_DATASET,
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SPA_FEATURE_NONE
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};
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zfeature_register(SPA_FEATURE_BOOKMARKS,
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"com.delphix:bookmarks", "bookmarks",
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"\"zfs bookmark\" command",
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ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
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bookmarks_deps);
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}
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{
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static const spa_feature_t filesystem_limits_deps[] = {
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SPA_FEATURE_EXTENSIBLE_DATASET,
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SPA_FEATURE_NONE
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};
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zfeature_register(SPA_FEATURE_FS_SS_LIMIT,
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"com.joyent:filesystem_limits", "filesystem_limits",
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"Filesystem and snapshot limits.",
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ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
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filesystem_limits_deps);
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}
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zfeature_register(SPA_FEATURE_EMBEDDED_DATA,
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"com.delphix:embedded_data", "embedded_data",
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"Blocks which compress very well use even less space.",
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ZFEATURE_FLAG_MOS | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
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ZFEATURE_TYPE_BOOLEAN, NULL);
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{
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static const spa_feature_t large_blocks_deps[] = {
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SPA_FEATURE_EXTENSIBLE_DATASET,
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SPA_FEATURE_NONE
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};
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zfeature_register(SPA_FEATURE_LARGE_BLOCKS,
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"org.open-zfs:large_blocks", "large_blocks",
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"Support for blocks larger than 128KB.",
|
||
|
|
ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
|
||
|
|
large_blocks_deps);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
static const spa_feature_t large_dnode_deps[] = {
|
||
|
|
SPA_FEATURE_EXTENSIBLE_DATASET,
|
||
|
|
SPA_FEATURE_NONE
|
||
|
|
};
|
||
|
|
zfeature_register(SPA_FEATURE_LARGE_DNODE,
|
||
|
|
"org.zfsonlinux:large_dnode", "large_dnode",
|
||
|
|
"Variable on-disk size of dnodes.",
|
||
|
|
ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
|
||
|
|
large_dnode_deps);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
static const spa_feature_t sha512_deps[] = {
|
||
|
|
SPA_FEATURE_EXTENSIBLE_DATASET,
|
||
|
|
SPA_FEATURE_NONE
|
||
|
|
};
|
||
|
|
zfeature_register(SPA_FEATURE_SHA512,
|
||
|
|
"org.illumos:sha512", "sha512",
|
||
|
|
"SHA-512/256 hash algorithm.",
|
||
|
|
ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
|
||
|
|
sha512_deps);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
static const spa_feature_t skein_deps[] = {
|
||
|
|
SPA_FEATURE_EXTENSIBLE_DATASET,
|
||
|
|
SPA_FEATURE_NONE
|
||
|
|
};
|
||
|
|
zfeature_register(SPA_FEATURE_SKEIN,
|
||
|
|
"org.illumos:skein", "skein",
|
||
|
|
"Skein hash algorithm.",
|
||
|
|
ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
|
||
|
|
skein_deps);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
static const spa_feature_t edonr_deps[] = {
|
||
|
|
SPA_FEATURE_EXTENSIBLE_DATASET,
|
||
|
|
SPA_FEATURE_NONE
|
||
|
|
};
|
||
|
|
zfeature_register(SPA_FEATURE_EDONR,
|
||
|
|
"org.illumos:edonr", "edonr",
|
||
|
|
"Edon-R hash algorithm.",
|
||
|
|
ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
|
||
|
|
edonr_deps);
|
||
|
|
}
|
||
|
|
|
||
|
|
zfeature_register(SPA_FEATURE_DEVICE_REMOVAL,
|
||
|
|
"com.delphix:device_removal", "device_removal",
|
||
|
|
"Top-level vdevs can be removed, reducing logical pool size.",
|
||
|
|
ZFEATURE_FLAG_MOS, ZFEATURE_TYPE_BOOLEAN, NULL);
|
||
|
|
|
||
|
|
{
|
||
|
|
static const spa_feature_t obsolete_counts_deps[] = {
|
||
|
|
SPA_FEATURE_EXTENSIBLE_DATASET,
|
||
|
|
SPA_FEATURE_DEVICE_REMOVAL,
|
||
|
|
SPA_FEATURE_NONE
|
||
|
|
};
|
||
|
|
zfeature_register(SPA_FEATURE_OBSOLETE_COUNTS,
|
||
|
|
"com.delphix:obsolete_counts", "obsolete_counts",
|
||
|
|
"Reduce memory used by removed devices when their blocks are "
|
||
|
|
"freed or remapped.",
|
||
|
|
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
|
||
|
|
obsolete_counts_deps);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
static const spa_feature_t userobj_accounting_deps[] = {
|
||
|
|
SPA_FEATURE_EXTENSIBLE_DATASET,
|
||
|
|
SPA_FEATURE_NONE
|
||
|
|
};
|
||
|
|
zfeature_register(SPA_FEATURE_USEROBJ_ACCOUNTING,
|
||
|
|
"org.zfsonlinux:userobj_accounting", "userobj_accounting",
|
||
|
|
"User/Group object accounting.",
|
||
|
|
ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_PER_DATASET,
|
||
|
|
ZFEATURE_TYPE_BOOLEAN, userobj_accounting_deps);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
static const spa_feature_t bookmark_v2_deps[] = {
|
||
|
|
SPA_FEATURE_EXTENSIBLE_DATASET,
|
||
|
|
SPA_FEATURE_BOOKMARKS,
|
||
|
|
SPA_FEATURE_NONE
|
||
|
|
};
|
||
|
|
zfeature_register(SPA_FEATURE_BOOKMARK_V2,
|
||
|
|
"com.datto:bookmark_v2", "bookmark_v2",
|
||
|
|
"Support for larger bookmarks",
|
||
|
|
0, ZFEATURE_TYPE_BOOLEAN, bookmark_v2_deps);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
static const spa_feature_t encryption_deps[] = {
|
||
|
|
SPA_FEATURE_EXTENSIBLE_DATASET,
|
||
|
|
SPA_FEATURE_BOOKMARK_V2,
|
||
|
|
SPA_FEATURE_NONE
|
||
|
|
};
|
||
|
|
zfeature_register(SPA_FEATURE_ENCRYPTION,
|
||
|
|
"com.datto:encryption", "encryption",
|
||
|
|
"Support for dataset level encryption",
|
||
|
|
ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
|
||
|
|
encryption_deps);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
static const spa_feature_t project_quota_deps[] = {
|
||
|
|
SPA_FEATURE_EXTENSIBLE_DATASET,
|
||
|
|
SPA_FEATURE_NONE
|
||
|
|
};
|
||
|
|
zfeature_register(SPA_FEATURE_PROJECT_QUOTA,
|
||
|
|
"org.zfsonlinux:project_quota", "project_quota",
|
||
|
|
"space/object accounting based on project ID.",
|
||
|
|
ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_PER_DATASET,
|
||
|
|
ZFEATURE_TYPE_BOOLEAN, project_quota_deps);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
zfeature_register(SPA_FEATURE_ALLOCATION_CLASSES,
|
||
|
|
"org.zfsonlinux:allocation_classes", "allocation_classes",
|
||
|
|
"Support for separate allocation classes.",
|
||
|
|
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
zfeature_register(SPA_FEATURE_RESILVER_DEFER,
|
||
|
|
"com.datto:resilver_defer", "resilver_defer",
|
||
|
|
"Support for deferring new resilvers when one is already running.",
|
||
|
|
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined(_KERNEL)
|
||
|
|
EXPORT_SYMBOL(zfeature_lookup_guid);
|
||
|
|
EXPORT_SYMBOL(zfeature_lookup_name);
|
||
|
|
EXPORT_SYMBOL(zfeature_is_supported);
|
||
|
|
EXPORT_SYMBOL(zfeature_is_valid_guid);
|
||
|
|
EXPORT_SYMBOL(zfeature_depends_on);
|
||
|
|
EXPORT_SYMBOL(zpool_feature_init);
|
||
|
|
EXPORT_SYMBOL(spa_feature_table);
|
||
|
|
#endif
|