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/*
| 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/*
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22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
| 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
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23 * Use is subject to license terms. 24 */ 25 26#ifndef _SYS_SPACE_MAP_H 27#define _SYS_SPACE_MAP_H 28
| 23 * Use is subject to license terms. 24 */ 25 26#ifndef _SYS_SPACE_MAP_H 27#define _SYS_SPACE_MAP_H 28
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29#pragma ident "%Z%%M% %I% %E% SMI" 30
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31#include <sys/avl.h> 32#include <sys/dmu.h> 33 34#ifdef __cplusplus 35extern "C" { 36#endif 37 38typedef struct space_map_ops space_map_ops_t; 39 40typedef struct space_map { 41 avl_tree_t sm_root; /* AVL tree of map segments */ 42 uint64_t sm_space; /* sum of all segments in the map */ 43 uint64_t sm_start; /* start of map */ 44 uint64_t sm_size; /* size of map */ 45 uint8_t sm_shift; /* unit shift */ 46 uint8_t sm_pad[3]; /* unused */ 47 uint8_t sm_loaded; /* map loaded? */ 48 uint8_t sm_loading; /* map loading? */ 49 kcondvar_t sm_load_cv; /* map load completion */ 50 space_map_ops_t *sm_ops; /* space map block picker ops vector */
| 29#include <sys/avl.h> 30#include <sys/dmu.h> 31 32#ifdef __cplusplus 33extern "C" { 34#endif 35 36typedef struct space_map_ops space_map_ops_t; 37 38typedef struct space_map { 39 avl_tree_t sm_root; /* AVL tree of map segments */ 40 uint64_t sm_space; /* sum of all segments in the map */ 41 uint64_t sm_start; /* start of map */ 42 uint64_t sm_size; /* size of map */ 43 uint8_t sm_shift; /* unit shift */ 44 uint8_t sm_pad[3]; /* unused */ 45 uint8_t sm_loaded; /* map loaded? */ 46 uint8_t sm_loading; /* map loading? */ 47 kcondvar_t sm_load_cv; /* map load completion */ 48 space_map_ops_t *sm_ops; /* space map block picker ops vector */
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| 49 avl_tree_t *sm_pp_root; /* picker-private AVL tree */
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51 void *sm_ppd; /* picker-private data */ 52 kmutex_t *sm_lock; /* pointer to lock that protects map */ 53} space_map_t; 54 55typedef struct space_seg { 56 avl_node_t ss_node; /* AVL node */
| 50 void *sm_ppd; /* picker-private data */ 51 kmutex_t *sm_lock; /* pointer to lock that protects map */ 52} space_map_t; 53 54typedef struct space_seg { 55 avl_node_t ss_node; /* AVL node */
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| 56 avl_node_t ss_pp_node; /* AVL picker-private node */
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57 uint64_t ss_start; /* starting offset of this segment */ 58 uint64_t ss_end; /* ending offset (non-inclusive) */ 59} space_seg_t; 60
| 57 uint64_t ss_start; /* starting offset of this segment */ 58 uint64_t ss_end; /* ending offset (non-inclusive) */ 59} space_seg_t; 60
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| 61typedef struct space_ref { 62 avl_node_t sr_node; /* AVL node */ 63 uint64_t sr_offset; /* offset (start or end) */ 64 int64_t sr_refcnt; /* associated reference count */ 65} space_ref_t; 66
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61typedef struct space_map_obj { 62 uint64_t smo_object; /* on-disk space map object */ 63 uint64_t smo_objsize; /* size of the object */ 64 uint64_t smo_alloc; /* space allocated from the map */ 65} space_map_obj_t; 66 67struct space_map_ops { 68 void (*smop_load)(space_map_t *sm); 69 void (*smop_unload)(space_map_t *sm); 70 uint64_t (*smop_alloc)(space_map_t *sm, uint64_t size); 71 void (*smop_claim)(space_map_t *sm, uint64_t start, uint64_t size); 72 void (*smop_free)(space_map_t *sm, uint64_t start, uint64_t size);
| 67typedef struct space_map_obj { 68 uint64_t smo_object; /* on-disk space map object */ 69 uint64_t smo_objsize; /* size of the object */ 70 uint64_t smo_alloc; /* space allocated from the map */ 71} space_map_obj_t; 72 73struct space_map_ops { 74 void (*smop_load)(space_map_t *sm); 75 void (*smop_unload)(space_map_t *sm); 76 uint64_t (*smop_alloc)(space_map_t *sm, uint64_t size); 77 void (*smop_claim)(space_map_t *sm, uint64_t start, uint64_t size); 78 void (*smop_free)(space_map_t *sm, uint64_t start, uint64_t size);
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| 79 uint64_t (*smop_max)(space_map_t *sm);
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73}; 74 75/* 76 * debug entry 77 * 78 * 1 3 10 50 79 * ,---+--------+------------+---------------------------------. 80 * | 1 | action | syncpass | txg (lower bits) | 81 * `---+--------+------------+---------------------------------' 82 * 63 62 60 59 50 49 0 83 * 84 * 85 * 86 * non-debug entry 87 * 88 * 1 47 1 15 89 * ,-----------------------------------------------------------. 90 * | 0 | offset (sm_shift units) | type | run | 91 * `-----------------------------------------------------------' 92 * 63 62 17 16 15 0 93 */ 94 95/* All this stuff takes and returns bytes */ 96#define SM_RUN_DECODE(x) (BF64_DECODE(x, 0, 15) + 1) 97#define SM_RUN_ENCODE(x) BF64_ENCODE((x) - 1, 0, 15) 98#define SM_TYPE_DECODE(x) BF64_DECODE(x, 15, 1) 99#define SM_TYPE_ENCODE(x) BF64_ENCODE(x, 15, 1) 100#define SM_OFFSET_DECODE(x) BF64_DECODE(x, 16, 47) 101#define SM_OFFSET_ENCODE(x) BF64_ENCODE(x, 16, 47) 102#define SM_DEBUG_DECODE(x) BF64_DECODE(x, 63, 1) 103#define SM_DEBUG_ENCODE(x) BF64_ENCODE(x, 63, 1) 104 105#define SM_DEBUG_ACTION_DECODE(x) BF64_DECODE(x, 60, 3) 106#define SM_DEBUG_ACTION_ENCODE(x) BF64_ENCODE(x, 60, 3) 107 108#define SM_DEBUG_SYNCPASS_DECODE(x) BF64_DECODE(x, 50, 10) 109#define SM_DEBUG_SYNCPASS_ENCODE(x) BF64_ENCODE(x, 50, 10) 110 111#define SM_DEBUG_TXG_DECODE(x) BF64_DECODE(x, 0, 50) 112#define SM_DEBUG_TXG_ENCODE(x) BF64_ENCODE(x, 0, 50) 113 114#define SM_RUN_MAX SM_RUN_DECODE(~0ULL) 115 116#define SM_ALLOC 0x0 117#define SM_FREE 0x1 118 119/* 120 * The data for a given space map can be kept on blocks of any size. 121 * Larger blocks entail fewer i/o operations, but they also cause the 122 * DMU to keep more data in-core, and also to waste more i/o bandwidth 123 * when only a few blocks have changed since the last transaction group. 124 * This could use a lot more research, but for now, set the freelist 125 * block size to 4k (2^12). 126 */ 127#define SPACE_MAP_BLOCKSHIFT 12 128 129typedef void space_map_func_t(space_map_t *sm, uint64_t start, uint64_t size); 130 131extern void space_map_create(space_map_t *sm, uint64_t start, uint64_t size, 132 uint8_t shift, kmutex_t *lp); 133extern void space_map_destroy(space_map_t *sm); 134extern void space_map_add(space_map_t *sm, uint64_t start, uint64_t size); 135extern void space_map_remove(space_map_t *sm, uint64_t start, uint64_t size);
| 80}; 81 82/* 83 * debug entry 84 * 85 * 1 3 10 50 86 * ,---+--------+------------+---------------------------------. 87 * | 1 | action | syncpass | txg (lower bits) | 88 * `---+--------+------------+---------------------------------' 89 * 63 62 60 59 50 49 0 90 * 91 * 92 * 93 * non-debug entry 94 * 95 * 1 47 1 15 96 * ,-----------------------------------------------------------. 97 * | 0 | offset (sm_shift units) | type | run | 98 * `-----------------------------------------------------------' 99 * 63 62 17 16 15 0 100 */ 101 102/* All this stuff takes and returns bytes */ 103#define SM_RUN_DECODE(x) (BF64_DECODE(x, 0, 15) + 1) 104#define SM_RUN_ENCODE(x) BF64_ENCODE((x) - 1, 0, 15) 105#define SM_TYPE_DECODE(x) BF64_DECODE(x, 15, 1) 106#define SM_TYPE_ENCODE(x) BF64_ENCODE(x, 15, 1) 107#define SM_OFFSET_DECODE(x) BF64_DECODE(x, 16, 47) 108#define SM_OFFSET_ENCODE(x) BF64_ENCODE(x, 16, 47) 109#define SM_DEBUG_DECODE(x) BF64_DECODE(x, 63, 1) 110#define SM_DEBUG_ENCODE(x) BF64_ENCODE(x, 63, 1) 111 112#define SM_DEBUG_ACTION_DECODE(x) BF64_DECODE(x, 60, 3) 113#define SM_DEBUG_ACTION_ENCODE(x) BF64_ENCODE(x, 60, 3) 114 115#define SM_DEBUG_SYNCPASS_DECODE(x) BF64_DECODE(x, 50, 10) 116#define SM_DEBUG_SYNCPASS_ENCODE(x) BF64_ENCODE(x, 50, 10) 117 118#define SM_DEBUG_TXG_DECODE(x) BF64_DECODE(x, 0, 50) 119#define SM_DEBUG_TXG_ENCODE(x) BF64_ENCODE(x, 0, 50) 120 121#define SM_RUN_MAX SM_RUN_DECODE(~0ULL) 122 123#define SM_ALLOC 0x0 124#define SM_FREE 0x1 125 126/* 127 * The data for a given space map can be kept on blocks of any size. 128 * Larger blocks entail fewer i/o operations, but they also cause the 129 * DMU to keep more data in-core, and also to waste more i/o bandwidth 130 * when only a few blocks have changed since the last transaction group. 131 * This could use a lot more research, but for now, set the freelist 132 * block size to 4k (2^12). 133 */ 134#define SPACE_MAP_BLOCKSHIFT 12 135 136typedef void space_map_func_t(space_map_t *sm, uint64_t start, uint64_t size); 137 138extern void space_map_create(space_map_t *sm, uint64_t start, uint64_t size, 139 uint8_t shift, kmutex_t *lp); 140extern void space_map_destroy(space_map_t *sm); 141extern void space_map_add(space_map_t *sm, uint64_t start, uint64_t size); 142extern void space_map_remove(space_map_t *sm, uint64_t start, uint64_t size);
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136extern int space_map_contains(space_map_t *sm, uint64_t start, uint64_t size);
| 143extern boolean_t space_map_contains(space_map_t *sm, 144 uint64_t start, uint64_t size);
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137extern void space_map_vacate(space_map_t *sm, 138 space_map_func_t *func, space_map_t *mdest); 139extern void space_map_walk(space_map_t *sm, 140 space_map_func_t *func, space_map_t *mdest);
| 145extern void space_map_vacate(space_map_t *sm, 146 space_map_func_t *func, space_map_t *mdest); 147extern void space_map_walk(space_map_t *sm, 148 space_map_func_t *func, space_map_t *mdest);
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141extern void space_map_excise(space_map_t *sm, uint64_t start, uint64_t size); 142extern void space_map_union(space_map_t *smd, space_map_t *sms);
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143 144extern void space_map_load_wait(space_map_t *sm); 145extern int space_map_load(space_map_t *sm, space_map_ops_t *ops, 146 uint8_t maptype, space_map_obj_t *smo, objset_t *os); 147extern void space_map_unload(space_map_t *sm); 148 149extern uint64_t space_map_alloc(space_map_t *sm, uint64_t size); 150extern void space_map_claim(space_map_t *sm, uint64_t start, uint64_t size); 151extern void space_map_free(space_map_t *sm, uint64_t start, uint64_t size);
| 149 150extern void space_map_load_wait(space_map_t *sm); 151extern int space_map_load(space_map_t *sm, space_map_ops_t *ops, 152 uint8_t maptype, space_map_obj_t *smo, objset_t *os); 153extern void space_map_unload(space_map_t *sm); 154 155extern uint64_t space_map_alloc(space_map_t *sm, uint64_t size); 156extern void space_map_claim(space_map_t *sm, uint64_t start, uint64_t size); 157extern void space_map_free(space_map_t *sm, uint64_t start, uint64_t size);
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| 158extern uint64_t space_map_maxsize(space_map_t *sm);
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152 153extern void space_map_sync(space_map_t *sm, uint8_t maptype, 154 space_map_obj_t *smo, objset_t *os, dmu_tx_t *tx); 155extern void space_map_truncate(space_map_obj_t *smo, 156 objset_t *os, dmu_tx_t *tx); 157
| 159 160extern void space_map_sync(space_map_t *sm, uint8_t maptype, 161 space_map_obj_t *smo, objset_t *os, dmu_tx_t *tx); 162extern void space_map_truncate(space_map_obj_t *smo, 163 objset_t *os, dmu_tx_t *tx); 164
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| 165extern void space_map_ref_create(avl_tree_t *t); 166extern void space_map_ref_destroy(avl_tree_t *t); 167extern void space_map_ref_add_seg(avl_tree_t *t, 168 uint64_t start, uint64_t end, int64_t refcnt); 169extern void space_map_ref_add_map(avl_tree_t *t, 170 space_map_t *sm, int64_t refcnt); 171extern void space_map_ref_generate_map(avl_tree_t *t, 172 space_map_t *sm, int64_t minref); 173
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158#ifdef __cplusplus 159} 160#endif 161 162#endif /* _SYS_SPACE_MAP_H */
| 174#ifdef __cplusplus 175} 176#endif 177 178#endif /* _SYS_SPACE_MAP_H */
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