zfeature_common.h revision 263390 
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_EXTENSIBLE_DATASET,
48	SPA_FEATURES
49} spa_feature_t;
50
51typedef struct zfeature_info {
52	spa_feature_t fi_feature;
53	const char *fi_uname;	/* User-facing feature name */
54	const char *fi_guid;	/* On-disk feature identifier */
55	const char *fi_desc;	/* Feature description */
56	boolean_t fi_can_readonly; /* Can open pool readonly w/o support? */
57	boolean_t fi_mos;	/* Is the feature necessary to read the MOS? */
58	/* array of dependencies, terminated by SPA_FEATURE_NONE */
59	const spa_feature_t *fi_depends;
60} zfeature_info_t;
61
62typedef int (zfeature_func_t)(zfeature_info_t *fi, void *arg);
63
64#define	ZFS_FEATURE_DEBUG
65
66extern zfeature_info_t spa_feature_table[SPA_FEATURES];
67
68extern boolean_t zfeature_is_valid_guid(const char *);
69
70extern boolean_t zfeature_is_supported(const char *);
71extern int zfeature_lookup_name(const char *name, spa_feature_t *res);
72
73extern void zpool_feature_init(void);
74
75#ifdef	__cplusplus
76}
77#endif
78
79#endif	/* _ZFEATURE_COMMON_H */
80