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      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  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 #ifndef _SYS_METASLAB_H
     27 #define	_SYS_METASLAB_H
     28 
     29 #pragma ident	"@(#)metaslab.h	1.6	07/06/21 SMI"
     30 
     31 #include <sys/spa.h>
     32 #include <sys/space_map.h>
     33 #include <sys/txg.h>
     34 #include <sys/zio.h>
     35 #include <sys/avl.h>
     36 
     37 #ifdef	__cplusplus
     38 extern "C" {
     39 #endif
     40 
     41 typedef struct metaslab_class metaslab_class_t;
     42 typedef struct metaslab_group metaslab_group_t;
     43 
     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);
     49 
     50 extern int metaslab_alloc(spa_t *spa, metaslab_class_t *mc, uint64_t psize,
     51     blkptr_t *bp, int ncopies, uint64_t txg, blkptr_t *hintbp,
     52     boolean_t hintbp_avoid);
     53 extern void metaslab_free(spa_t *spa, const blkptr_t *bp, uint64_t txg,
     54     boolean_t now);
     55 extern int metaslab_claim(spa_t *spa, const blkptr_t *bp, uint64_t txg);
     56 
     57 extern metaslab_class_t *metaslab_class_create(void);
     58 extern void metaslab_class_destroy(metaslab_class_t *mc);
     59 extern void metaslab_class_add(metaslab_class_t *mc, metaslab_group_t *mg);
     60 extern void metaslab_class_remove(metaslab_class_t *mc, metaslab_group_t *mg);
     61 
     62 extern metaslab_group_t *metaslab_group_create(metaslab_class_t *mc,
     63     vdev_t *vd);
     64 extern void metaslab_group_destroy(metaslab_group_t *mg);
     65 
     66 #ifdef	__cplusplus
     67 }
     68 #endif
     69 
     70 #endif	/* _SYS_METASLAB_H */
     71