usr/src/uts/common/fs/zfs/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  */
  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
  67 int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t,
  68     blkptr_t *, int, uint64_t, blkptr_t *, int, zio_alloc_list_t *, zio_t *,
  69     int);
  70 int metaslab_alloc_dva(spa_t *, metaslab_class_t *, uint64_t,
  71     dva_t *, int, dva_t *, uint64_t, int, zio_alloc_list_t *, int);
  72 void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t);
  73 void metaslab_free_concrete(vdev_t *, uint64_t, uint64_t, boolean_t);
  74 void metaslab_free_dva(spa_t *, const dva_t *, boolean_t);
  75 void metaslab_free_impl_cb(uint64_t, vdev_t *, uint64_t, uint64_t, void *);
  76 void metaslab_unalloc_dva(spa_t *, const dva_t *, uint64_t);
  77 int metaslab_claim(spa_t *, const blkptr_t *, uint64_t);
  78 int metaslab_claim_impl(vdev_t *, uint64_t, uint64_t, uint64_t);
  79 void metaslab_check_free(spa_t *, const blkptr_t *);
  80
  81 void metaslab_alloc_trace_init(void);
  82 void metaslab_alloc_trace_fini(void);
  83 void metaslab_trace_init(zio_alloc_list_t *);
  84 void metaslab_trace_fini(zio_alloc_list_t *);
  85
  86 metaslab_class_t *metaslab_class_create(spa_t *, metaslab_ops_t *);
  87 void metaslab_class_destroy(metaslab_class_t *);
  88 int metaslab_class_validate(metaslab_class_t *);
  89 void metaslab_class_histogram_verify(metaslab_class_t *);
  90 uint64_t metaslab_class_fragmentation(metaslab_class_t *);
  91 uint64_t metaslab_class_expandable_space(metaslab_class_t *);
  92 boolean_t metaslab_class_throttle_reserve(metaslab_class_t *, int, int,
  93     zio_t *, int);
  94 void metaslab_class_throttle_unreserve(metaslab_class_t *, int, int, zio_t *);
  95
  96 void metaslab_class_space_update(metaslab_class_t *, int64_t, int64_t,
  97     int64_t, int64_t);
  98 uint64_t metaslab_class_get_alloc(metaslab_class_t *);
  99 uint64_t metaslab_class_get_space(metaslab_class_t *);
 100 uint64_t metaslab_class_get_dspace(metaslab_class_t *);
 101 uint64_t metaslab_class_get_deferred(metaslab_class_t *);
 102
 103 metaslab_group_t *metaslab_group_create(metaslab_class_t *, vdev_t *, int);
 104 void metaslab_group_destroy(metaslab_group_t *);
 105 void metaslab_group_activate(metaslab_group_t *);
 106 void metaslab_group_passivate(metaslab_group_t *);
 107 boolean_t metaslab_group_initialized(metaslab_group_t *);
 108 uint64_t metaslab_group_get_space(metaslab_group_t *);
 109 void metaslab_group_histogram_verify(metaslab_group_t *);
 110 uint64_t metaslab_group_fragmentation(metaslab_group_t *);
 111 void metaslab_group_histogram_remove(metaslab_group_t *, metaslab_t *);
 112 void metaslab_group_alloc_decrement(spa_t *, uint64_t, void *, int, int,
 113     boolean_t);
 114 void metaslab_group_alloc_verify(spa_t *, const blkptr_t *, void *, int);
 115
 116 #ifdef  __cplusplus
 117 }
 118 #endif
 119
 120 #endif  /* _SYS_METASLAB_H */