xref: /titanic_52/usr/src/common/zfs/zfeature_common.h (revision 2c2d21e98a95cba5687ec6574c974a5c6c4a6adb)
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  */
25 
26 #ifndef _ZFEATURE_COMMON_H
27 #define	_ZFEATURE_COMMON_H
28 
29 #include <sys/fs/zfs.h>
30 #include <sys/inttypes.h>
31 #include <sys/types.h>
32 
33 #ifdef	__cplusplus
34 extern "C" {
35 #endif
36 
37 struct zfeature_info;
38 
39 typedef 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 
48 typedef int (zfeature_func_t)(zfeature_info_t *fi, void *arg);
49 
50 #define	ZFS_FEATURE_DEBUG
51 
52 enum spa_feature {
53 	SPA_FEATURE_ASYNC_DESTROY,
54 	SPA_FEATURES
55 } spa_feature_t;
56 
57 extern zfeature_info_t spa_feature_table[SPA_FEATURES];
58 
59 extern boolean_t zfeature_is_valid_guid(const char *);
60 
61 extern boolean_t zfeature_is_supported(const char *);
62 extern int zfeature_lookup_guid(const char *, zfeature_info_t **res);
63 extern int zfeature_lookup_name(const char *, zfeature_info_t **res);
64 
65 extern void zpool_feature_init(void);
66 
67 #ifdef	__cplusplus
68 }
69 #endif
70 
71 #endif	/* _ZFEATURE_COMMON_H */
72