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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 | */ | |
26 | ||
27 | #ifndef _ZFEATURE_COMMON_H | |
28 | #define _ZFEATURE_COMMON_H | |
29 | ||
30 | #include <sys/fs/zfs.h> | |
31 | #include <sys/inttypes.h> | |
32 | #include <sys/types.h> | |
33 | ||
34 | #ifdef __cplusplus | |
35 | extern "C" { | |
36 | #endif | |
37 | ||
38 | struct zfeature_info; | |
39 | ||
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_FEATURES | |
54 | } spa_feature_t; | |
55 | ||
56 | #define SPA_FEATURE_DISABLED (-1ULL) | |
57 | ||
58 | typedef struct zfeature_info { | |
59 | spa_feature_t fi_feature; | |
60 | const char *fi_uname; /* User-facing feature name */ | |
61 | const char *fi_guid; /* On-disk feature identifier */ | |
62 | const char *fi_desc; /* Feature description */ | |
63 | boolean_t fi_can_readonly; /* Can open pool readonly w/o support? */ | |
64 | boolean_t fi_mos; /* Is the feature necessary to read the MOS? */ | |
65 | /* Activate this feature at the same time it is enabled */ | |
66 | boolean_t fi_activate_on_enable; | |
67 | /* array of dependencies, terminated by SPA_FEATURE_NONE */ | |
68 | const spa_feature_t *fi_depends; | |
69 | } zfeature_info_t; | |
70 | ||
71 | typedef int (zfeature_func_t)(zfeature_info_t *, void *); | |
72 | ||
73 | #define ZFS_FEATURE_DEBUG | |
74 | ||
75 | extern zfeature_info_t spa_feature_table[SPA_FEATURES]; | |
76 | ||
77 | extern boolean_t zfeature_is_valid_guid(const char *); | |
78 | ||
79 | extern boolean_t zfeature_is_supported(const char *); | |
80 | extern int zfeature_lookup_name(const char *, spa_feature_t *); | |
81 | extern boolean_t zfeature_depends_on(spa_feature_t, spa_feature_t); | |
82 | ||
83 | extern void zpool_feature_init(void); | |
84 | ||
85 | #ifdef __cplusplus | |
86 | } | |
87 | #endif | |
88 | ||
89 | #endif /* _ZFEATURE_COMMON_H */ |