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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  23  * Copyright (c) 2011, 2016 by Delphix. All rights reserved.
  24  */
  25
  26 #ifndef _SYS_METASLAB_H
  27 #define _SYS_METASLAB_H
  28
  29 #include <sys/spa.h>
  30 #include <sys/space_map.h>
  31 #include <sys/txg.h>
  32 #include <sys/zio.h>
  33 #include <sys/avl.h>
  34
  35 #ifdef  __cplusplus
  36 extern "C" {
  37 #endif
  38
  39
  40 typedef struct metaslab_ops {
  41         uint64_t (*msop_alloc)(metaslab_t *, uint64_t);
  42 } metaslab_ops_t;
  43
  44
  45 extern metaslab_ops_t *zfs_metaslab_ops;
  46
  47 int metaslab_init(metaslab_group_t *, uint64_t, uint64_t, uint64_t,
  48     metaslab_t **);
  49 void metaslab_fini(metaslab_t *);
  50
  51 void metaslab_load_wait(metaslab_t *);
  52 int metaslab_load(metaslab_t *);
  53 void metaslab_unload(metaslab_t *);
  54
  55 void metaslab_sync(metaslab_t *, uint64_t);
  56 void metaslab_sync_done(metaslab_t *, uint64_t);
  57 void metaslab_sync_reassess(metaslab_group_t *);
  58 uint64_t metaslab_block_maxsize(metaslab_t *);
  59
  60 #define METASLAB_HINTBP_FAVOR           0x0
  61 #define METASLAB_HINTBP_AVOID           0x1
  62 #define METASLAB_GANG_HEADER            0x2
  63 #define METASLAB_GANG_CHILD             0x4
  64 #define METASLAB_ASYNC_ALLOC            0x8
  65 #define METASLAB_DONT_THROTTLE          0x10
  66 #define METASLAB_FASTWRITE              0x20
  67
  68 int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t,
  69     blkptr_t *, int, uint64_t, blkptr_t *, int, zio_alloc_list_t *, zio_t *);
  70 void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t);
  71 int metaslab_claim(spa_t *, const blkptr_t *, uint64_t);
  72 void metaslab_check_free(spa_t *, const blkptr_t *);
  73 void metaslab_fastwrite_mark(spa_t *, const blkptr_t *);
  74 void metaslab_fastwrite_unmark(spa_t *, const blkptr_t *);
  75
  76 void metaslab_alloc_trace_init(void);
  77 void metaslab_alloc_trace_fini(void);
  78 void metaslab_trace_init(zio_alloc_list_t *);
  79 void metaslab_trace_fini(zio_alloc_list_t *);
  80
  81 metaslab_class_t *metaslab_class_create(spa_t *, metaslab_ops_t *);
  82 void metaslab_class_destroy(metaslab_class_t *);
  83 int metaslab_class_validate(metaslab_class_t *);
  84 void metaslab_class_histogram_verify(metaslab_class_t *);
  85 uint64_t metaslab_class_fragmentation(metaslab_class_t *);
  86 uint64_t metaslab_class_expandable_space(metaslab_class_t *);
  87 boolean_t metaslab_class_throttle_reserve(metaslab_class_t *, int,
  88     zio_t *, int);
  89 void metaslab_class_throttle_unreserve(metaslab_class_t *, int, zio_t *);
  90
  91 void metaslab_class_space_update(metaslab_class_t *, int64_t, int64_t,
  92     int64_t, int64_t);
  93 uint64_t metaslab_class_get_alloc(metaslab_class_t *);
  94 uint64_t metaslab_class_get_space(metaslab_class_t *);
  95 uint64_t metaslab_class_get_dspace(metaslab_class_t *);
  96 uint64_t metaslab_class_get_deferred(metaslab_class_t *);
  97
  98 metaslab_group_t *metaslab_group_create(metaslab_class_t *, vdev_t *);
  99 void metaslab_group_destroy(metaslab_group_t *);
 100 void metaslab_group_activate(metaslab_group_t *);
 101 void metaslab_group_passivate(metaslab_group_t *);
 102 boolean_t metaslab_group_initialized(metaslab_group_t *);
 103 uint64_t metaslab_group_get_space(metaslab_group_t *);
 104 void metaslab_group_histogram_verify(metaslab_group_t *);
 105 uint64_t metaslab_group_fragmentation(metaslab_group_t *);
 106 void metaslab_group_histogram_remove(metaslab_group_t *, metaslab_t *);
 107 void metaslab_group_alloc_decrement(spa_t *, uint64_t, void *, int);
 108 void metaslab_group_alloc_verify(spa_t *, const blkptr_t *, void *);
 109
 110 #ifdef  __cplusplus
 111 }
 112 #endif
 113
 114 #endif  /* _SYS_METASLAB_H */