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, 2015 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 */
28
29#ifndef _ZFEATURE_COMMON_H
30#define _ZFEATURE_COMMON_H
31
32#include <sys/fs/zfs.h>
33#include <sys/types.h>
34
35#ifdef __cplusplus
36extern "C" {
37#endif
38
39struct zfeature_info;
40
41typedef enum spa_feature {
42 SPA_FEATURE_NONE = -1,
43 SPA_FEATURE_ASYNC_DESTROY,
44 SPA_FEATURE_EMPTY_BPOBJ,
45 SPA_FEATURE_LZ4_COMPRESS,
46 SPA_FEATURE_MULTI_VDEV_CRASH_DUMP,
47 SPA_FEATURE_SPACEMAP_HISTOGRAM,
48 SPA_FEATURE_ENABLED_TXG,
49 SPA_FEATURE_HOLE_BIRTH,
50 SPA_FEATURE_EXTENSIBLE_DATASET,
51 SPA_FEATURE_EMBEDDED_DATA,
52 SPA_FEATURE_BOOKMARKS,
53 SPA_FEATURE_FS_SS_LIMIT,
54 SPA_FEATURE_LARGE_BLOCKS,
55#ifndef __NetBSD__
56 SPA_FEATURE_SHA512,
57 SPA_FEATURE_SKEIN,
58#endif
59#ifdef illumos
60 SPA_FEATURE_EDONR,
61#endif
62 SPA_FEATURES
63} spa_feature_t;
64
65#define SPA_FEATURE_DISABLED (-1ULL)
66
67typedef enum zfeature_flags {
68 /* Can open pool readonly even if this feature is not supported. */
69 ZFEATURE_FLAG_READONLY_COMPAT = (1 << 0),
70 /* Is this feature necessary to read the MOS? */
71 ZFEATURE_FLAG_MOS = (1 << 1),
72 /* Activate this feature at the same time it is enabled. */
73 ZFEATURE_FLAG_ACTIVATE_ON_ENABLE = (1 << 2),
74 /* Each dataset has a field set if it has ever used this feature. */
75 ZFEATURE_FLAG_PER_DATASET = (1 << 3)
76} zfeature_flags_t;
77
78typedef struct zfeature_info {
79 spa_feature_t fi_feature;
80 const char *fi_uname; /* User-facing feature name */
81 const char *fi_guid; /* On-disk feature identifier */
82 const char *fi_desc; /* Feature description */
83 zfeature_flags_t fi_flags;
84 /* array of dependencies, terminated by SPA_FEATURE_NONE */
85 const spa_feature_t *fi_depends;
86} zfeature_info_t;
87
88typedef int (zfeature_func_t)(zfeature_info_t *, void *);
89
90#define ZFS_FEATURE_DEBUG
91
92extern zfeature_info_t spa_feature_table[SPA_FEATURES];
93
94extern boolean_t zfeature_is_valid_guid(const char *);
95
96extern boolean_t zfeature_is_supported(const char *);
97extern int zfeature_lookup_name(const char *, spa_feature_t *);
98extern boolean_t zfeature_depends_on(spa_feature_t, spa_feature_t);
99
100extern void zpool_feature_init(void);
101
102#ifdef __cplusplus
103}
104#endif
105
106#endif /* _ZFEATURE_COMMON_H */
107