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 * 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_FEATURES 52 } spa_feature_t; 53 54 #define SPA_FEATURE_DISABLED (-1ULL) 55 56 typedef struct zfeature_info { 57 spa_feature_t fi_feature; 58 const char *fi_uname; /* User-facing feature name */ 59 const char *fi_guid; /* On-disk feature identifier */ 60 const char *fi_desc; /* Feature description */ 61 boolean_t fi_can_readonly; /* Can open pool readonly w/o support? */ 62 boolean_t fi_mos; /* Is the feature necessary to read the MOS? */ 63 /* Activate this feature at the same time it is enabled */ 64 boolean_t fi_activate_on_enable; 65 /* array of dependencies, terminated by SPA_FEATURE_NONE */ 66 const spa_feature_t *fi_depends; 67 } zfeature_info_t; 68 69 typedef int (zfeature_func_t)(zfeature_info_t *fi, void *arg); 70 71 #define ZFS_FEATURE_DEBUG 72 73 extern zfeature_info_t spa_feature_table[SPA_FEATURES]; 74 75 extern boolean_t zfeature_is_valid_guid(const char *); 76 77 extern boolean_t zfeature_is_supported(const char *); 78 extern int zfeature_lookup_name(const char *name, spa_feature_t *res); 79 extern boolean_t zfeature_depends_on(spa_feature_t fid, spa_feature_t check); 80 81 extern void zpool_feature_init(void); 82 83 #ifdef __cplusplus 84 } 85 #endif 86 87 #endif /* _ZFEATURE_COMMON_H */ 88