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, 2018 by Delphix. All rights reserved.
  24  * Copyright (c) 2017, Intel Corporation.
  25  */
  26
  27 #ifndef _SYS_METASLAB_H
  28 #define _SYS_METASLAB_H
  29
  30 #include <sys/spa.h>
  31 #include <sys/space_map.h>
  32 #include <sys/txg.h>
  33 #include <sys/zio.h>
  34 #include <sys/avl.h>
  35
  36 #ifdef  __cplusplus
  37 extern "C" {
  38 #endif
  39
  40
  41 typedef struct metaslab_ops {
  42         uint64_t (*msop_alloc)(metaslab_t *, uint64_t);
  43 } metaslab_ops_t;
  44
  45
  46 extern metaslab_ops_t *zfs_metaslab_ops;
  47
  48 int metaslab_init(metaslab_group_t *, uint64_t, uint64_t, uint64_t,
  49     metaslab_t **);
  50 void metaslab_fini(metaslab_t *);
  51
  52 int metaslab_load(metaslab_t *);
  53 void metaslab_unload(metaslab_t *);
  54
  55 uint64_t metaslab_allocated_space(metaslab_t *);
  56
  57 void metaslab_sync(metaslab_t *, uint64_t);
  58 void metaslab_sync_done(metaslab_t *, uint64_t);
  59 void metaslab_sync_reassess(metaslab_group_t *);
  60 uint64_t metaslab_block_maxsize(metaslab_t *);
  61
  62 /*
  63  * metaslab alloc flags
  64  */
  65 #define METASLAB_HINTBP_FAVOR           0x0
  66 #define METASLAB_HINTBP_AVOID           0x1
  67 #define METASLAB_GANG_HEADER            0x2
  68 #define METASLAB_GANG_CHILD             0x4
  69 #define METASLAB_ASYNC_ALLOC            0x8
  70 #define METASLAB_DONT_THROTTLE          0x10
  71 #define METASLAB_MUST_RESERVE           0x20
  72 #define METASLAB_FASTWRITE              0x40
  73
  74 int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t,
  75     blkptr_t *, int, uint64_t, blkptr_t *, int, zio_alloc_list_t *, zio_t *,
  76         int);
  77 int metaslab_alloc_dva(spa_t *, metaslab_class_t *, uint64_t,
  78     dva_t *, int, dva_t *, uint64_t, int, zio_alloc_list_t *, int);
  79 void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t);
  80 void metaslab_free_concrete(vdev_t *, uint64_t, uint64_t, boolean_t);
  81 void metaslab_free_dva(spa_t *, const dva_t *, boolean_t);
  82 void metaslab_free_impl_cb(uint64_t, vdev_t *, uint64_t, uint64_t, void *);
  83 void metaslab_unalloc_dva(spa_t *, const dva_t *, uint64_t);
  84 int metaslab_claim(spa_t *, const blkptr_t *, uint64_t);
  85 int metaslab_claim_impl(vdev_t *, uint64_t, uint64_t, uint64_t);
  86 void metaslab_check_free(spa_t *, const blkptr_t *);
  87 void metaslab_fastwrite_mark(spa_t *, const blkptr_t *);
  88 void metaslab_fastwrite_unmark(spa_t *, const blkptr_t *);
  89
  90 void metaslab_alloc_trace_init(void);
  91 void metaslab_alloc_trace_fini(void);
  92 void metaslab_trace_init(zio_alloc_list_t *);
  93 void metaslab_trace_fini(zio_alloc_list_t *);
  94
  95 metaslab_class_t *metaslab_class_create(spa_t *, metaslab_ops_t *);
  96 void metaslab_class_destroy(metaslab_class_t *);
  97 int metaslab_class_validate(metaslab_class_t *);
  98 void metaslab_class_histogram_verify(metaslab_class_t *);
  99 uint64_t metaslab_class_fragmentation(metaslab_class_t *);
 100 uint64_t metaslab_class_expandable_space(metaslab_class_t *);
 101 boolean_t metaslab_class_throttle_reserve(metaslab_class_t *, int, int,
 102     zio_t *, int);
 103 void metaslab_class_throttle_unreserve(metaslab_class_t *, int, int, zio_t *);
 104
 105 uint64_t metaslab_class_get_alloc(metaslab_class_t *);
 106 uint64_t metaslab_class_get_space(metaslab_class_t *);
 107 uint64_t metaslab_class_get_dspace(metaslab_class_t *);
 108 uint64_t metaslab_class_get_deferred(metaslab_class_t *);
 109
 110 metaslab_group_t *metaslab_group_create(metaslab_class_t *, vdev_t *, int);
 111 void metaslab_group_destroy(metaslab_group_t *);
 112 void metaslab_group_activate(metaslab_group_t *);
 113 void metaslab_group_passivate(metaslab_group_t *);
 114 boolean_t metaslab_group_initialized(metaslab_group_t *);
 115 uint64_t metaslab_group_get_space(metaslab_group_t *);
 116 void metaslab_group_histogram_verify(metaslab_group_t *);
 117 uint64_t metaslab_group_fragmentation(metaslab_group_t *);
 118 void metaslab_group_histogram_remove(metaslab_group_t *, metaslab_t *);
 119 void metaslab_group_alloc_decrement(spa_t *, uint64_t, void *, int, int,
 120     boolean_t);
 121 void metaslab_group_alloc_verify(spa_t *, const blkptr_t *, void *, int);
 122
 123 #ifdef  __cplusplus
 124 }
 125 #endif
 126
 127 #endif  /* _SYS_METASLAB_H */