zfeature_common.h revision 246586 
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) 2012 by Delphix. All rights reserved.
24 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
25 */
26
27#ifndef _ZFEATURE_COMMON_H
28#define	_ZFEATURE_COMMON_H
29
30#include <sys/fs/zfs.h>
31#include <sys/types.h>
32
33#ifdef	__cplusplus
34extern "C" {
35#endif
36
37struct zfeature_info;
38
39typedef struct zfeature_info {
40	const char *fi_uname;	/* User-facing feature name */
41	const char *fi_guid;	/* On-disk feature identifier */
42	const char *fi_desc;	/* Feature description */
43	boolean_t fi_can_readonly; /* Can open pool readonly w/o support? */
44	boolean_t fi_mos;	/* Is the feature necessary to read the MOS? */
45	struct zfeature_info **fi_depends; /* array; null terminated */
46} zfeature_info_t;
47
48typedef int (zfeature_func_t)(zfeature_info_t *fi, void *arg);
49
50#define	ZFS_FEATURE_DEBUG
51
52static enum spa_feature {
53	SPA_FEATURE_ASYNC_DESTROY,
54	SPA_FEATURE_EMPTY_BPOBJ,
55	SPA_FEATURE_LZ4_COMPRESS,
56	SPA_FEATURES
57} spa_feature_t;
58
59extern zfeature_info_t spa_feature_table[SPA_FEATURES];
60
61extern boolean_t zfeature_is_valid_guid(const char *);
62
63extern boolean_t zfeature_is_supported(const char *);
64extern int zfeature_lookup_guid(const char *, zfeature_info_t **res);
65extern int zfeature_lookup_name(const char *, zfeature_info_t **res);
66
67extern void zpool_feature_init(void);
68
69#ifdef	__cplusplus
70}
71#endif
72
73#endif	/* _ZFEATURE_COMMON_H */
74