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) 2013 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_BOOKMARKS,
53 #define SPA_FEATURE_DISABLED (-1ULL)
55 typedef struct zfeature_info {
56 spa_feature_t fi_feature;
57 const char *fi_uname; /* User-facing feature name */
58 const char *fi_guid; /* On-disk feature identifier */
59 const char *fi_desc; /* Feature description */
60 boolean_t fi_can_readonly; /* Can open pool readonly w/o support? */
61 boolean_t fi_mos; /* Is the feature necessary to read the MOS? */
62 /* Activate this feature at the same time it is enabled */
63 boolean_t fi_activate_on_enable;
64 /* array of dependencies, terminated by SPA_FEATURE_NONE */
65 const spa_feature_t *fi_depends;
68 typedef int (zfeature_func_t)(zfeature_info_t *fi, void *arg);
70 #define ZFS_FEATURE_DEBUG
72 extern zfeature_info_t spa_feature_table[SPA_FEATURES];
74 extern boolean_t zfeature_is_valid_guid(const char *);
76 extern boolean_t zfeature_is_supported(const char *);
77 extern int zfeature_lookup_name(const char *name, spa_feature_t *res);
78 extern boolean_t zfeature_depends_on(spa_feature_t fid, spa_feature_t check);
80 extern void zpool_feature_init(void);
86 #endif /* _ZFEATURE_COMMON_H */