include/sys/zfeature.h

   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
  34 extern "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
  41 struct spa;
  42 struct dmu_tx;
  43 struct objset;
  44
  45 extern void spa_feature_create_zap_objects(struct spa *, struct dmu_tx *);
  46 extern void spa_feature_enable(struct spa *, spa_feature_t,
  47     struct dmu_tx *);
  48 extern void spa_feature_incr(struct spa *, spa_feature_t, struct dmu_tx *);
  49 extern void spa_feature_decr(struct spa *, spa_feature_t, struct dmu_tx *);
  50 extern boolean_t spa_feature_is_enabled(struct spa *, spa_feature_t);
  51 extern boolean_t spa_feature_is_active(struct spa *, spa_feature_t);
  52 extern boolean_t spa_feature_enabled_txg(spa_t *spa, spa_feature_t fid,
  53     uint64_t *txg);
  54 extern uint64_t spa_feature_refcount(spa_t *, spa_feature_t, uint64_t);
  55 extern 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  */
  61 extern int feature_get_refcount(struct spa *, zfeature_info_t *, uint64_t *);
  62 extern int feature_get_refcount_from_disk(spa_t *spa, zfeature_info_t *feature,
  63     uint64_t *res);
  64 extern void feature_enable_sync(struct spa *, zfeature_info_t *,
  65     struct dmu_tx *);
  66 extern 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 */