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) 2011, 2015 by Delphix. All rights reserved. 24 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 25 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 26 */ 27 28 #ifndef _ZFEATURE_COMMON_H 29 #define _ZFEATURE_COMMON_H 30 31 #include <sys/fs/zfs.h> 32 #include <sys/inttypes.h> 33 #include <sys/types.h> 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 struct zfeature_info; 40 41 typedef enum spa_feature { 42 SPA_FEATURE_NONE = -1, 43 SPA_FEATURE_ASYNC_DESTROY, 44 SPA_FEATURE_EMPTY_BPOBJ, 45 SPA_FEATURE_LZ4_COMPRESS, 46 SPA_FEATURE_MULTI_VDEV_CRASH_DUMP, 47 SPA_FEATURE_SPACEMAP_HISTOGRAM, 48 SPA_FEATURE_ENABLED_TXG, 49 SPA_FEATURE_HOLE_BIRTH, 50 SPA_FEATURE_EXTENSIBLE_DATASET, 51 SPA_FEATURE_EMBEDDED_DATA, 52 SPA_FEATURE_BOOKMARKS, 53 SPA_FEATURE_FS_SS_LIMIT, 54 SPA_FEATURE_LARGE_BLOCKS, 55 SPA_FEATURES 56 } spa_feature_t; 57 58 #define SPA_FEATURE_DISABLED (-1ULL) 59 60 typedef enum zfeature_flags { 61 /* Can open pool readonly even if this feature is not supported. */ 62 ZFEATURE_FLAG_READONLY_COMPAT = (1 << 0), 63 /* Is this feature necessary to read the MOS? */ 64 ZFEATURE_FLAG_MOS = (1 << 1), 65 /* Activate this feature at the same time it is enabled. */ 66 ZFEATURE_FLAG_ACTIVATE_ON_ENABLE = (1 << 2), 67 /* Each dataset has a field set if it has ever used this feature. */ 68 ZFEATURE_FLAG_PER_DATASET = (1 << 3) 69 } zfeature_flags_t; 70 71 typedef struct zfeature_info { 72 spa_feature_t fi_feature; 73 const char *fi_uname; /* User-facing feature name */ 74 const char *fi_guid; /* On-disk feature identifier */ 75 const char *fi_desc; /* Feature description */ 76 zfeature_flags_t fi_flags; 77 /* array of dependencies, terminated by SPA_FEATURE_NONE */ 78 const spa_feature_t *fi_depends; 79 } zfeature_info_t; 80 81 typedef int (zfeature_func_t)(zfeature_info_t *, void *); 82 83 #define ZFS_FEATURE_DEBUG 84 85 extern zfeature_info_t spa_feature_table[SPA_FEATURES]; 86 87 extern boolean_t zfeature_is_valid_guid(const char *); 88 89 extern boolean_t zfeature_is_supported(const char *); 90 extern int zfeature_lookup_name(const char *, spa_feature_t *); 91 extern boolean_t zfeature_depends_on(spa_feature_t, spa_feature_t); 92 93 extern void zpool_feature_init(void); 94 95 #ifdef __cplusplus 96 } 97 #endif 98 99 #endif /* _ZFEATURE_COMMON_H */ 100