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.
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.
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]
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
26 #ifndef _SYS_METASLAB_H
27 #define _SYS_METASLAB_H
30 #include <sys/space_map.h>
39 typedef struct metaslab_class metaslab_class_t;
40 typedef struct metaslab_group metaslab_group_t;
42 extern space_map_ops_t *zfs_metaslab_ops;
44 extern metaslab_t *metaslab_init(metaslab_group_t *mg, space_map_obj_t *smo,
45 uint64_t start, uint64_t size, uint64_t txg);
46 extern void metaslab_fini(metaslab_t *msp);
47 extern void metaslab_sync(metaslab_t *msp, uint64_t txg);
48 extern void metaslab_sync_done(metaslab_t *msp, uint64_t txg);
50 #define METASLAB_HINTBP_FAVOR 0x0
51 #define METASLAB_HINTBP_AVOID 0x1
52 #define METASLAB_GANG_HEADER 0x2
54 extern int metaslab_alloc(spa_t *spa, metaslab_class_t *mc, uint64_t psize,
55 blkptr_t *bp, int ncopies, uint64_t txg, blkptr_t *hintbp, int flags);
56 extern void metaslab_free(spa_t *spa, const blkptr_t *bp, uint64_t txg,
58 extern int metaslab_claim(spa_t *spa, const blkptr_t *bp, uint64_t txg);
60 extern metaslab_class_t *metaslab_class_create(space_map_ops_t *ops);
61 extern void metaslab_class_destroy(metaslab_class_t *mc);
62 extern void metaslab_class_add(metaslab_class_t *mc, metaslab_group_t *mg);
63 extern void metaslab_class_remove(metaslab_class_t *mc, metaslab_group_t *mg);
65 extern metaslab_group_t *metaslab_group_create(metaslab_class_t *mc,
67 extern void metaslab_group_destroy(metaslab_group_t *mg);
73 #endif /* _SYS_METASLAB_H */