zfeature_common.h revision 263407 
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) 2013 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 */
27
28#ifndef _ZFEATURE_COMMON_H
29#define	_ZFEATURE_COMMON_H
30
31#include <sys/fs/zfs.h>
32#include <sys/types.h>
33
34#ifdef	__cplusplus
35extern "C" {
36#endif
37
38struct zfeature_info;
39
40typedef enum spa_feature {
41	SPA_FEATURE_NONE = -1,
42	SPA_FEATURE_ASYNC_DESTROY,
43	SPA_FEATURE_EMPTY_BPOBJ,
44	SPA_FEATURE_LZ4_COMPRESS,
45	SPA_FEATURE_MULTI_VDEV_CRASH_DUMP,
46	SPA_FEATURE_SPACEMAP_HISTOGRAM,
47	SPA_FEATURE_ENABLED_TXG,
48	SPA_FEATURE_HOLE_BIRTH,
49	SPA_FEATURE_EXTENSIBLE_DATASET,
50	SPA_FEATURE_BOOKMARKS,
51	SPA_FEATURES
52} spa_feature_t;
53
54#define	SPA_FEATURE_DISABLED	(-1ULL)
55
56typedef struct zfeature_info {
57	spa_feature_t fi_feature;
58	const char *fi_uname;	/* User-facing feature name */
59	const char *fi_guid;	/* On-disk feature identifier */
60	const char *fi_desc;	/* Feature description */
61	boolean_t fi_can_readonly; /* Can open pool readonly w/o support? */
62	boolean_t fi_mos;	/* Is the feature necessary to read the MOS? */
63	/* Activate this feature at the same time it is enabled */
64	boolean_t fi_activate_on_enable;
65	/* array of dependencies, terminated by SPA_FEATURE_NONE */
66	const spa_feature_t *fi_depends;
67} zfeature_info_t;
68
69typedef int (zfeature_func_t)(zfeature_info_t *fi, void *arg);
70
71#define	ZFS_FEATURE_DEBUG
72
73extern zfeature_info_t spa_feature_table[SPA_FEATURES];
74
75extern boolean_t zfeature_is_valid_guid(const char *);
76
77extern boolean_t zfeature_is_supported(const char *);
78extern int zfeature_lookup_name(const char *name, spa_feature_t *res);
79extern boolean_t zfeature_depends_on(spa_feature_t fid, spa_feature_t check);
80
81extern void zpool_feature_init(void);
82
83#ifdef	__cplusplus
84}
85#endif
86
87#endif	/* _ZFEATURE_COMMON_H */
88