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 */
25
26#ifndef _SYS_ZFEATURE_H
27#define _SYS_ZFEATURE_H
28
29#include <sys/nvpair.h>
30#include <sys/txg.h>
31#include "zfeature_common.h"
32
33#ifdef __cplusplus
34extern "C" {
35#endif
36
37#define VALID_FEATURE_FID(fid) ((fid) >= 0 && (fid) < SPA_FEATURES)
38#define VALID_FEATURE_OR_NONE(fid) ((fid) == SPA_FEATURE_NONE || \
39 VALID_FEATURE_FID(fid))
40
41struct spa;
42struct dmu_tx;
43struct objset;
44
45extern void spa_feature_create_zap_objects(struct spa *, struct dmu_tx *);
46extern void spa_feature_enable(struct spa *, spa_feature_t,
47 struct dmu_tx *);
48extern void spa_feature_incr(struct spa *, spa_feature_t, struct dmu_tx *);
49extern void spa_feature_decr(struct spa *, spa_feature_t, struct dmu_tx *);
50extern boolean_t spa_feature_is_enabled(struct spa *, spa_feature_t);
51extern boolean_t spa_feature_is_active(struct spa *, spa_feature_t);
52extern boolean_t spa_feature_enabled_txg(spa_t *spa, spa_feature_t fid,
53 uint64_t *txg);
54extern uint64_t spa_feature_refcount(spa_t *, spa_feature_t, uint64_t);
55extern boolean_t spa_features_check(spa_t *, boolean_t, nvlist_t *, nvlist_t *);
56
57/*
58 * These functions are only exported for zhack and zdb; normal callers should
59 * use the above interfaces.
60 */
61extern int feature_get_refcount(struct spa *, zfeature_info_t *, uint64_t *);
62extern int feature_get_refcount_from_disk(spa_t *spa, zfeature_info_t *feature,
63 uint64_t *res);
64extern void feature_enable_sync(struct spa *, zfeature_info_t *,
65 struct dmu_tx *);
66extern void feature_sync(struct spa *, zfeature_info_t *, uint64_t,
67 struct dmu_tx *);
68
69#ifdef __cplusplus
70}
71#endif
72
73#endif /* _SYS_ZFEATURE_H */
74