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.
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.
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]
23 * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
24 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
27 #ifndef _ZFEATURE_COMMON_H
28 #define _ZFEATURE_COMMON_H
30 #include <sys/fs/zfs.h>
31 #include <sys/inttypes.h>
32 #include <sys/types.h>
40 typedef 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_SPACEMAP_HISTOGRAM
,
46 SPA_FEATURE_ENABLED_TXG
,
47 SPA_FEATURE_HOLE_BIRTH
,
48 SPA_FEATURE_EXTENSIBLE_DATASET
,
49 SPA_FEATURE_EMBEDDED_DATA
,
50 SPA_FEATURE_BOOKMARKS
,
51 SPA_FEATURE_FS_SS_LIMIT
,
52 SPA_FEATURE_LARGE_BLOCKS
,
53 SPA_FEATURE_LARGE_DNODE
,
60 #define SPA_FEATURE_DISABLED (-1ULL)
62 typedef enum zfeature_flags
{
63 /* Can open pool readonly even if this feature is not supported. */
64 ZFEATURE_FLAG_READONLY_COMPAT
= (1 << 0),
65 /* Is this feature necessary to read the MOS? */
66 ZFEATURE_FLAG_MOS
= (1 << 1),
67 /* Activate this feature at the same time it is enabled. */
68 ZFEATURE_FLAG_ACTIVATE_ON_ENABLE
= (1 << 2),
69 /* Each dataset has a field set if it has ever used this feature. */
70 ZFEATURE_FLAG_PER_DATASET
= (1 << 3)
73 typedef struct zfeature_info
{
74 spa_feature_t fi_feature
;
75 const char *fi_uname
; /* User-facing feature name */
76 const char *fi_guid
; /* On-disk feature identifier */
77 const char *fi_desc
; /* Feature description */
78 zfeature_flags_t fi_flags
;
79 /* array of dependencies, terminated by SPA_FEATURE_NONE */
80 const spa_feature_t
*fi_depends
;
83 typedef int (zfeature_func_t
)(zfeature_info_t
*, void *);
85 #define ZFS_FEATURE_DEBUG
87 extern zfeature_info_t spa_feature_table
[SPA_FEATURES
];
89 extern boolean_t
zfeature_is_valid_guid(const char *);
91 extern boolean_t
zfeature_is_supported(const char *);
92 extern int zfeature_lookup_name(const char *, spa_feature_t
*);
93 extern boolean_t
zfeature_depends_on(spa_feature_t
, spa_feature_t
);
95 extern void zpool_feature_init(void);
101 #endif /* _ZFEATURE_COMMON_H */