1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright (c) 2011, 2017 by Delphix. All rights reserved.
24 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
25 * Copyright (c) 2013, Joyent, Inc. All rights reserved.
26 * Copyright (c) 2014 Integros [integros.com]
27 * Copyright (c) 2017, Intel Corporation.
28 */
29
30#ifndef _ZFEATURE_COMMON_H
31#define	_ZFEATURE_COMMON_H
32
33#include <sys/fs/zfs.h>
34#include <sys/inttypes.h>
35#include <sys/types.h>
36
37#ifdef	__cplusplus
38extern "C" {
39#endif
40
41struct zfeature_info;
42
43typedef enum spa_feature {
44	SPA_FEATURE_NONE = -1,
45	SPA_FEATURE_ASYNC_DESTROY,
46	SPA_FEATURE_EMPTY_BPOBJ,
47	SPA_FEATURE_LZ4_COMPRESS,
48	SPA_FEATURE_MULTI_VDEV_CRASH_DUMP,
49	SPA_FEATURE_SPACEMAP_HISTOGRAM,
50	SPA_FEATURE_ENABLED_TXG,
51	SPA_FEATURE_HOLE_BIRTH,
52	SPA_FEATURE_EXTENSIBLE_DATASET,
53	SPA_FEATURE_EMBEDDED_DATA,
54	SPA_FEATURE_BOOKMARKS,
55	SPA_FEATURE_FS_SS_LIMIT,
56	SPA_FEATURE_LARGE_BLOCKS,
57	SPA_FEATURE_LARGE_DNODE,
58	SPA_FEATURE_SHA512,
59	SPA_FEATURE_SKEIN,
60	SPA_FEATURE_EDONR,
61	SPA_FEATURE_DEVICE_REMOVAL,
62	SPA_FEATURE_OBSOLETE_COUNTS,
63	SPA_FEATURE_POOL_CHECKPOINT,
64	SPA_FEATURE_SPACEMAP_V2,
65	SPA_FEATURE_ALLOCATION_CLASSES,
66	SPA_FEATURE_RESILVER_DEFER,
67	SPA_FEATURE_ENCRYPTION,
68	SPA_FEATURE_BOOKMARK_V2,
69	SPA_FEATURE_USEROBJ_ACCOUNTING,
70	SPA_FEATURE_PROJECT_QUOTA,
71	SPA_FEATURE_LOG_SPACEMAP,
72	SPA_FEATURES
73} spa_feature_t;
74
75#define	SPA_FEATURE_DISABLED	(-1ULL)
76
77typedef enum zfeature_flags {
78	/* Can open pool readonly even if this feature is not supported. */
79	ZFEATURE_FLAG_READONLY_COMPAT =		(1 << 0),
80	/* Is this feature necessary to read the MOS? */
81	ZFEATURE_FLAG_MOS =			(1 << 1),
82	/* Activate this feature at the same time it is enabled. */
83	ZFEATURE_FLAG_ACTIVATE_ON_ENABLE =	(1 << 2),
84	/* Each dataset has a field set if it has ever used this feature. */
85	ZFEATURE_FLAG_PER_DATASET =		(1 << 3)
86} zfeature_flags_t;
87
88typedef struct zfeature_info {
89	spa_feature_t fi_feature;
90	const char *fi_uname;	/* User-facing feature name */
91	const char *fi_guid;	/* On-disk feature identifier */
92	const char *fi_desc;	/* Feature description */
93	zfeature_flags_t fi_flags;
94	/* array of dependencies, terminated by SPA_FEATURE_NONE */
95	const spa_feature_t *fi_depends;
96} zfeature_info_t;
97
98typedef int (zfeature_func_t)(zfeature_info_t *, void *);
99
100#define	ZFS_FEATURE_DEBUG
101
102extern zfeature_info_t spa_feature_table[SPA_FEATURES];
103
104extern boolean_t zfeature_is_valid_guid(const char *);
105
106extern boolean_t zfeature_is_supported(const char *);
107extern int zfeature_lookup_name(const char *, spa_feature_t *);
108extern boolean_t zfeature_depends_on(spa_feature_t, spa_feature_t);
109
110extern void zpool_feature_init(void);
111
112#ifdef	__cplusplus
113}
114#endif
115
116#endif	/* _ZFEATURE_COMMON_H */
117