/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 2011, 2018 by Delphix. All rights reserved.
 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
 * Copyright (c) 2013, Joyent, Inc. All rights reserved.
 * Copyright (c) 2014 Integros [integros.com]
 * Copyright (c) 2017, Intel Corporation.
 */

#ifndef _ZFEATURE_COMMON_H
#define _ZFEATURE_COMMON_H

#include <sys/fs/zfs.h>
#include <sys/inttypes.h>
#include <sys/types.h>

#ifdef  __cplusplus
extern "C" {
#endif

struct zfeature_info;

typedef enum spa_feature {
        SPA_FEATURE_NONE = -1,
        SPA_FEATURE_ASYNC_DESTROY,
        SPA_FEATURE_EMPTY_BPOBJ,
        SPA_FEATURE_LZ4_COMPRESS,
        SPA_FEATURE_MULTI_VDEV_CRASH_DUMP,
        SPA_FEATURE_SPACEMAP_HISTOGRAM,
        SPA_FEATURE_ENABLED_TXG,
        SPA_FEATURE_HOLE_BIRTH,
        SPA_FEATURE_EXTENSIBLE_DATASET,
        SPA_FEATURE_EMBEDDED_DATA,
        SPA_FEATURE_BOOKMARKS,
        SPA_FEATURE_FS_SS_LIMIT,
        SPA_FEATURE_LARGE_BLOCKS,
        SPA_FEATURE_LARGE_DNODE,
        SPA_FEATURE_SHA512,
        SPA_FEATURE_SKEIN,
        SPA_FEATURE_EDONR,
        SPA_FEATURE_DEVICE_REMOVAL,
        SPA_FEATURE_OBSOLETE_COUNTS,
        SPA_FEATURE_POOL_CHECKPOINT,
        SPA_FEATURE_SPACEMAP_V2,
        SPA_FEATURE_ALLOCATION_CLASSES,
        SPA_FEATURE_RESILVER_DEFER,
        SPA_FEATURE_ENCRYPTION,
        SPA_FEATURE_BOOKMARK_V2,
        SPA_FEATURE_USEROBJ_ACCOUNTING,
        SPA_FEATURE_PROJECT_QUOTA,
        SPA_FEATURE_LOG_SPACEMAP,
        SPA_FEATURES
} spa_feature_t;

#define SPA_FEATURE_DISABLED    (-1ULL)

typedef enum zfeature_flags {
        /* Can open pool readonly even if this feature is not supported. */
        ZFEATURE_FLAG_READONLY_COMPAT =         (1 << 0),
        /*
         * Is this feature necessary to load the pool? i.e. do we need this
         * feature to read the full feature list out of the MOS?
         */
        ZFEATURE_FLAG_MOS =                     (1 << 1),
        /* Activate this feature at the same time it is enabled. */
        ZFEATURE_FLAG_ACTIVATE_ON_ENABLE =      (1 << 2),
        /* Each dataset has a field set if it has ever used this feature. */
        ZFEATURE_FLAG_PER_DATASET =             (1 << 3)
} zfeature_flags_t;

typedef enum zfeature_type {
        ZFEATURE_TYPE_BOOLEAN,
        ZFEATURE_TYPE_UINT64_ARRAY,
        ZFEATURE_NUM_TYPES
} zfeature_type_t;

typedef struct zfeature_info {
        spa_feature_t fi_feature;
        const char *fi_uname;   /* User-facing feature name */
        const char *fi_guid;    /* On-disk feature identifier */
        const char *fi_desc;    /* Feature description */
        zfeature_flags_t fi_flags;
        zfeature_type_t fi_type; /* Only relevant for PER_DATASET features */
        /* array of dependencies, terminated by SPA_FEATURE_NONE */
        const spa_feature_t *fi_depends;
} zfeature_info_t;

typedef int (zfeature_func_t)(zfeature_info_t *, void *);

#define ZFS_FEATURE_DEBUG

extern zfeature_info_t spa_feature_table[SPA_FEATURES];

extern boolean_t zfeature_is_valid_guid(const char *);

extern boolean_t zfeature_is_supported(const char *);
extern int zfeature_lookup_name(const char *, spa_feature_t *);
extern boolean_t zfeature_depends_on(spa_feature_t, spa_feature_t);

extern void zpool_feature_init(void);

#ifdef  __cplusplus
}
#endif

#endif  /* _ZFEATURE_COMMON_H */