zfs/lib/libzcommon/include/sys/metaslab.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  * 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 */