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 void metaslab_set_unflushed_txg(metaslab_t *, uint64_t, dmu_tx_t *);
  53 void metaslab_set_estimated_condensed_size(metaslab_t *, uint64_t, dmu_tx_t *);
  54 uint64_t metaslab_unflushed_txg(metaslab_t *);
  55 uint64_t metaslab_estimated_condensed_size(metaslab_t *);
  56 int metaslab_sort_by_flushed(const void *, const void *);
  57 uint64_t metaslab_unflushed_changes_memused(metaslab_t *);
  58
  59 int metaslab_load(metaslab_t *);
  60 void metaslab_unload(metaslab_t *);
  61 boolean_t metaslab_flush(metaslab_t *, dmu_tx_t *);
  62
  63 uint64_t metaslab_allocated_space(metaslab_t *);
  64
  65 void metaslab_sync(metaslab_t *, uint64_t);
  66 void metaslab_sync_done(metaslab_t *, uint64_t);
  67 void metaslab_sync_reassess(metaslab_group_t *);
  68 uint64_t metaslab_largest_allocatable(metaslab_t *);
  69
  70 /*
  71  * metaslab alloc flags
  72  */
  73 #define METASLAB_HINTBP_FAVOR           0x0
  74 #define METASLAB_HINTBP_AVOID           0x1
  75 #define METASLAB_GANG_HEADER            0x2
  76 #define METASLAB_GANG_CHILD             0x4
  77 #define METASLAB_ASYNC_ALLOC            0x8
  78 #define METASLAB_DONT_THROTTLE          0x10
  79 #define METASLAB_MUST_RESERVE           0x20
  80 #define METASLAB_FASTWRITE              0x40
  81
  82 int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t,
  83     blkptr_t *, int, uint64_t, blkptr_t *, int, zio_alloc_list_t *, zio_t *,
  84         int);
  85 int metaslab_alloc_dva(spa_t *, metaslab_class_t *, uint64_t,
  86     dva_t *, int, dva_t *, uint64_t, int, zio_alloc_list_t *, int);
  87 void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t);
  88 void metaslab_free_concrete(vdev_t *, uint64_t, uint64_t, boolean_t);
  89 void metaslab_free_dva(spa_t *, const dva_t *, boolean_t);
  90 void metaslab_free_impl_cb(uint64_t, vdev_t *, uint64_t, uint64_t, void *);
  91 void metaslab_unalloc_dva(spa_t *, const dva_t *, uint64_t);
  92 int metaslab_claim(spa_t *, const blkptr_t *, uint64_t);
  93 int metaslab_claim_impl(vdev_t *, uint64_t, uint64_t, uint64_t);
  94 void metaslab_check_free(spa_t *, const blkptr_t *);
  95 void metaslab_fastwrite_mark(spa_t *, const blkptr_t *);
  96 void metaslab_fastwrite_unmark(spa_t *, const blkptr_t *);
  97
  98 void metaslab_stat_init(void);
  99 void metaslab_stat_fini(void);
 100 void metaslab_trace_init(zio_alloc_list_t *);
 101 void metaslab_trace_fini(zio_alloc_list_t *);
 102
 103 metaslab_class_t *metaslab_class_create(spa_t *, metaslab_ops_t *);
 104 void metaslab_class_destroy(metaslab_class_t *);
 105 int metaslab_class_validate(metaslab_class_t *);
 106 void metaslab_class_histogram_verify(metaslab_class_t *);
 107 uint64_t metaslab_class_fragmentation(metaslab_class_t *);
 108 uint64_t metaslab_class_expandable_space(metaslab_class_t *);
 109 boolean_t metaslab_class_throttle_reserve(metaslab_class_t *, int, int,
 110     zio_t *, int);
 111 void metaslab_class_throttle_unreserve(metaslab_class_t *, int, int, zio_t *);
 112 void metaslab_class_evict_old(metaslab_class_t *, uint64_t);
 113 uint64_t metaslab_class_get_alloc(metaslab_class_t *);
 114 uint64_t metaslab_class_get_space(metaslab_class_t *);
 115 uint64_t metaslab_class_get_dspace(metaslab_class_t *);
 116 uint64_t metaslab_class_get_deferred(metaslab_class_t *);
 117
 118 void metaslab_space_update(vdev_t *, metaslab_class_t *,
 119     int64_t, int64_t, int64_t);
 120
 121 metaslab_group_t *metaslab_group_create(metaslab_class_t *, vdev_t *, int);
 122 void metaslab_group_destroy(metaslab_group_t *);
 123 void metaslab_group_activate(metaslab_group_t *);
 124 void metaslab_group_passivate(metaslab_group_t *);
 125 boolean_t metaslab_group_initialized(metaslab_group_t *);
 126 uint64_t metaslab_group_get_space(metaslab_group_t *);
 127 void metaslab_group_histogram_verify(metaslab_group_t *);
 128 uint64_t metaslab_group_fragmentation(metaslab_group_t *);
 129 void metaslab_group_histogram_remove(metaslab_group_t *, metaslab_t *);
 130 void metaslab_group_alloc_decrement(spa_t *, uint64_t, void *, int, int,
 131     boolean_t);
 132 void metaslab_group_alloc_verify(spa_t *, const blkptr_t *, void *, int);
 133 void metaslab_recalculate_weight_and_sort(metaslab_t *);
 134 void metaslab_disable(metaslab_t *);
 135 void metaslab_enable(metaslab_t *, boolean_t, boolean_t);
 136 void metaslab_set_selected_txg(metaslab_t *, uint64_t);
 137
 138 extern int metaslab_debug_load;
 139
 140 range_seg_type_t metaslab_calculate_range_tree_type(vdev_t *vdev,
 141     metaslab_t *msp, uint64_t *start, uint64_t *shift);
 142
 143 #ifdef  __cplusplus
 144 }
 145 #endif
 146
 147 #endif  /* _SYS_METASLAB_H */