zfeature_common.h revision 288572
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/types.h> 33 34#ifdef __cplusplus 35extern "C" { 36#endif 37 38struct zfeature_info; 39 40typedef 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_MULTI_VDEV_CRASH_DUMP, 46 SPA_FEATURE_SPACEMAP_HISTOGRAM, 47 SPA_FEATURE_ENABLED_TXG, 48 SPA_FEATURE_HOLE_BIRTH, 49 SPA_FEATURE_EXTENSIBLE_DATASET, 50 SPA_FEATURE_EMBEDDED_DATA, 51 SPA_FEATURE_BOOKMARKS, 52 SPA_FEATURE_FS_SS_LIMIT, 53 SPA_FEATURE_LARGE_BLOCKS, 54 SPA_FEATURES 55} spa_feature_t; 56 57#define SPA_FEATURE_DISABLED (-1ULL) 58 59typedef enum zfeature_flags { 60 /* Can open pool readonly even if this feature is not supported. */ 61 ZFEATURE_FLAG_READONLY_COMPAT = (1 << 0), 62 /* Is this feature necessary to read the MOS? */ 63 ZFEATURE_FLAG_MOS = (1 << 1), 64 /* Activate this feature at the same time it is enabled. */ 65 ZFEATURE_FLAG_ACTIVATE_ON_ENABLE = (1 << 2), 66 /* Each dataset has a field set if it has ever used this feature. */ 67 ZFEATURE_FLAG_PER_DATASET = (1 << 3) 68} zfeature_flags_t; 69 70typedef struct zfeature_info { 71 spa_feature_t fi_feature; 72 const char *fi_uname; /* User-facing feature name */ 73 const char *fi_guid; /* On-disk feature identifier */ 74 const char *fi_desc; /* Feature description */ 75 zfeature_flags_t fi_flags; 76 /* array of dependencies, terminated by SPA_FEATURE_NONE */ 77 const spa_feature_t *fi_depends; 78} zfeature_info_t; 79 80typedef int (zfeature_func_t)(zfeature_info_t *, void *); 81 82#define ZFS_FEATURE_DEBUG 83 84extern zfeature_info_t spa_feature_table[SPA_FEATURES]; 85 86extern boolean_t zfeature_is_valid_guid(const char *); 87 88extern boolean_t zfeature_is_supported(const char *); 89extern int zfeature_lookup_name(const char *, spa_feature_t *); 90extern boolean_t zfeature_depends_on(spa_feature_t, spa_feature_t); 91 92extern void zpool_feature_init(void); 93 94#ifdef __cplusplus 95} 96#endif 97 98#endif /* _ZFEATURE_COMMON_H */ 99