projects / mirror_ubuntu-artful-kernel.git / blame
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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 */ |