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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) 2009, 2010, Oracle and/or its affiliates. All rights reserved. | |
23 | */ | |
24 | ||
25 | #ifndef _SYS_DDT_H | |
26 | #define _SYS_DDT_H | |
27 | ||
28 | #include <sys/sysmacros.h> | |
29 | #include <sys/types.h> | |
30 | #include <sys/fs/zfs.h> | |
31 | #include <sys/zio.h> | |
32 | #include <sys/dmu.h> | |
33 | ||
34 | #ifdef __cplusplus | |
35 | extern "C" { | |
36 | #endif | |
37 | ||
38 | /* | |
39 | * On-disk DDT formats, in the desired search order (newest version first). | |
40 | */ | |
41 | enum ddt_type { | |
42 | DDT_TYPE_ZAP = 0, | |
43 | DDT_TYPES | |
44 | }; | |
45 | ||
46 | /* | |
47 | * DDT classes, in the desired search order (highest replication level first). | |
48 | */ | |
49 | enum ddt_class { | |
50 | DDT_CLASS_DITTO = 0, | |
51 | DDT_CLASS_DUPLICATE, | |
52 | DDT_CLASS_UNIQUE, | |
53 | DDT_CLASSES | |
54 | }; | |
55 | ||
56 | #define DDT_TYPE_CURRENT 0 | |
57 | ||
58 | #define DDT_COMPRESS_BYTEORDER_MASK 0x80 | |
59 | #define DDT_COMPRESS_FUNCTION_MASK 0x7f | |
60 | ||
61 | /* | |
62 | * On-disk ddt entry: key (name) and physical storage (value). | |
63 | */ | |
64 | typedef struct ddt_key { | |
65 | zio_cksum_t ddk_cksum; /* 256-bit block checksum */ | |
a08ee875 LG |
66 | /* |
67 | * Encoded with logical & physical size, and compression, as follows: | |
68 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
69 | * | 0 | 0 | 0 | comp | PSIZE | LSIZE | | |
70 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
71 | */ | |
72 | uint64_t ddk_prop; | |
428870ff BB |
73 | } ddt_key_t; |
74 | ||
428870ff BB |
75 | #define DDK_GET_LSIZE(ddk) \ |
76 | BF64_GET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1) | |
77 | #define DDK_SET_LSIZE(ddk, x) \ | |
78 | BF64_SET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x) | |
79 | ||
80 | #define DDK_GET_PSIZE(ddk) \ | |
81 | BF64_GET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1) | |
82 | #define DDK_SET_PSIZE(ddk, x) \ | |
83 | BF64_SET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x) | |
84 | ||
85 | #define DDK_GET_COMPRESS(ddk) BF64_GET((ddk)->ddk_prop, 32, 8) | |
86 | #define DDK_SET_COMPRESS(ddk, x) BF64_SET((ddk)->ddk_prop, 32, 8, x) | |
87 | ||
88 | #define DDT_KEY_WORDS (sizeof (ddt_key_t) / sizeof (uint64_t)) | |
89 | ||
90 | typedef struct ddt_phys { | |
91 | dva_t ddp_dva[SPA_DVAS_PER_BP]; | |
92 | uint64_t ddp_refcnt; | |
93 | uint64_t ddp_phys_birth; | |
94 | } ddt_phys_t; | |
95 | ||
96 | enum ddt_phys_type { | |
97 | DDT_PHYS_DITTO = 0, | |
98 | DDT_PHYS_SINGLE = 1, | |
99 | DDT_PHYS_DOUBLE = 2, | |
100 | DDT_PHYS_TRIPLE = 3, | |
101 | DDT_PHYS_TYPES | |
102 | }; | |
103 | ||
104 | /* | |
105 | * In-core ddt entry | |
106 | */ | |
107 | struct ddt_entry { | |
108 | ddt_key_t dde_key; | |
109 | ddt_phys_t dde_phys[DDT_PHYS_TYPES]; | |
110 | zio_t *dde_lead_zio[DDT_PHYS_TYPES]; | |
111 | void *dde_repair_data; | |
112 | enum ddt_type dde_type; | |
113 | enum ddt_class dde_class; | |
114 | uint8_t dde_loading; | |
115 | uint8_t dde_loaded; | |
116 | kcondvar_t dde_cv; | |
117 | avl_node_t dde_node; | |
118 | }; | |
119 | ||
120 | /* | |
121 | * In-core ddt | |
122 | */ | |
123 | struct ddt { | |
124 | kmutex_t ddt_lock; | |
125 | avl_tree_t ddt_tree; | |
126 | avl_tree_t ddt_repair_tree; | |
127 | enum zio_checksum ddt_checksum; | |
128 | spa_t *ddt_spa; | |
129 | objset_t *ddt_os; | |
130 | uint64_t ddt_stat_object; | |
131 | uint64_t ddt_object[DDT_TYPES][DDT_CLASSES]; | |
132 | ddt_histogram_t ddt_histogram[DDT_TYPES][DDT_CLASSES]; | |
133 | ddt_histogram_t ddt_histogram_cache[DDT_TYPES][DDT_CLASSES]; | |
134 | ddt_object_t ddt_object_stats[DDT_TYPES][DDT_CLASSES]; | |
135 | avl_node_t ddt_node; | |
136 | }; | |
137 | ||
138 | /* | |
139 | * In-core and on-disk bookmark for DDT walks | |
140 | */ | |
141 | typedef struct ddt_bookmark { | |
142 | uint64_t ddb_class; | |
143 | uint64_t ddb_type; | |
144 | uint64_t ddb_checksum; | |
145 | uint64_t ddb_cursor; | |
146 | } ddt_bookmark_t; | |
147 | ||
148 | /* | |
149 | * Ops vector to access a specific DDT object type. | |
150 | */ | |
151 | typedef struct ddt_ops { | |
152 | char ddt_op_name[32]; | |
153 | int (*ddt_op_create)(objset_t *os, uint64_t *object, dmu_tx_t *tx, | |
154 | boolean_t prehash); | |
155 | int (*ddt_op_destroy)(objset_t *os, uint64_t object, dmu_tx_t *tx); | |
156 | int (*ddt_op_lookup)(objset_t *os, uint64_t object, ddt_entry_t *dde); | |
157 | void (*ddt_op_prefetch)(objset_t *os, uint64_t object, | |
158 | ddt_entry_t *dde); | |
159 | int (*ddt_op_update)(objset_t *os, uint64_t object, ddt_entry_t *dde, | |
160 | dmu_tx_t *tx); | |
161 | int (*ddt_op_remove)(objset_t *os, uint64_t object, ddt_entry_t *dde, | |
162 | dmu_tx_t *tx); | |
163 | int (*ddt_op_walk)(objset_t *os, uint64_t object, ddt_entry_t *dde, | |
164 | uint64_t *walk); | |
e8fd45a0 | 165 | int (*ddt_op_count)(objset_t *os, uint64_t object, uint64_t *count); |
428870ff BB |
166 | } ddt_ops_t; |
167 | ||
168 | #define DDT_NAMELEN 80 | |
169 | ||
170 | extern void ddt_object_name(ddt_t *ddt, enum ddt_type type, | |
171 | enum ddt_class class, char *name); | |
172 | extern int ddt_object_walk(ddt_t *ddt, enum ddt_type type, | |
173 | enum ddt_class class, uint64_t *walk, ddt_entry_t *dde); | |
e8fd45a0 BB |
174 | extern int ddt_object_count(ddt_t *ddt, enum ddt_type type, |
175 | enum ddt_class class, uint64_t *count); | |
428870ff BB |
176 | extern int ddt_object_info(ddt_t *ddt, enum ddt_type type, |
177 | enum ddt_class class, dmu_object_info_t *); | |
178 | extern boolean_t ddt_object_exists(ddt_t *ddt, enum ddt_type type, | |
179 | enum ddt_class class); | |
180 | ||
181 | extern void ddt_bp_fill(const ddt_phys_t *ddp, blkptr_t *bp, | |
182 | uint64_t txg); | |
183 | extern void ddt_bp_create(enum zio_checksum checksum, const ddt_key_t *ddk, | |
184 | const ddt_phys_t *ddp, blkptr_t *bp); | |
185 | ||
186 | extern void ddt_key_fill(ddt_key_t *ddk, const blkptr_t *bp); | |
187 | ||
188 | extern void ddt_phys_fill(ddt_phys_t *ddp, const blkptr_t *bp); | |
189 | extern void ddt_phys_clear(ddt_phys_t *ddp); | |
190 | extern void ddt_phys_addref(ddt_phys_t *ddp); | |
191 | extern void ddt_phys_decref(ddt_phys_t *ddp); | |
192 | extern void ddt_phys_free(ddt_t *ddt, ddt_key_t *ddk, ddt_phys_t *ddp, | |
193 | uint64_t txg); | |
194 | extern ddt_phys_t *ddt_phys_select(const ddt_entry_t *dde, const blkptr_t *bp); | |
195 | extern uint64_t ddt_phys_total_refcnt(const ddt_entry_t *dde); | |
196 | ||
197 | extern void ddt_stat_add(ddt_stat_t *dst, const ddt_stat_t *src, uint64_t neg); | |
198 | ||
199 | extern void ddt_histogram_add(ddt_histogram_t *dst, const ddt_histogram_t *src); | |
200 | extern void ddt_histogram_stat(ddt_stat_t *dds, const ddt_histogram_t *ddh); | |
201 | extern boolean_t ddt_histogram_empty(const ddt_histogram_t *ddh); | |
202 | extern void ddt_get_dedup_object_stats(spa_t *spa, ddt_object_t *ddo); | |
203 | extern void ddt_get_dedup_histogram(spa_t *spa, ddt_histogram_t *ddh); | |
204 | extern void ddt_get_dedup_stats(spa_t *spa, ddt_stat_t *dds_total); | |
205 | ||
206 | extern uint64_t ddt_get_dedup_dspace(spa_t *spa); | |
207 | extern uint64_t ddt_get_pool_dedup_ratio(spa_t *spa); | |
208 | ||
209 | extern int ddt_ditto_copies_needed(ddt_t *ddt, ddt_entry_t *dde, | |
210 | ddt_phys_t *ddp_willref); | |
211 | extern int ddt_ditto_copies_present(ddt_entry_t *dde); | |
212 | ||
213 | extern size_t ddt_compress(void *src, uchar_t *dst, size_t s_len, size_t d_len); | |
214 | extern void ddt_decompress(uchar_t *src, void *dst, size_t s_len, size_t d_len); | |
215 | ||
216 | extern ddt_t *ddt_select(spa_t *spa, const blkptr_t *bp); | |
217 | extern void ddt_enter(ddt_t *ddt); | |
218 | extern void ddt_exit(ddt_t *ddt); | |
a08ee875 LG |
219 | extern void ddt_init(void); |
220 | extern void ddt_fini(void); | |
428870ff BB |
221 | extern ddt_entry_t *ddt_lookup(ddt_t *ddt, const blkptr_t *bp, boolean_t add); |
222 | extern void ddt_prefetch(spa_t *spa, const blkptr_t *bp); | |
223 | extern void ddt_remove(ddt_t *ddt, ddt_entry_t *dde); | |
224 | ||
225 | extern boolean_t ddt_class_contains(spa_t *spa, enum ddt_class max_class, | |
226 | const blkptr_t *bp); | |
227 | ||
228 | extern ddt_entry_t *ddt_repair_start(ddt_t *ddt, const blkptr_t *bp); | |
229 | extern void ddt_repair_done(ddt_t *ddt, ddt_entry_t *dde); | |
230 | ||
231 | extern int ddt_entry_compare(const void *x1, const void *x2); | |
232 | ||
233 | extern void ddt_create(spa_t *spa); | |
234 | extern int ddt_load(spa_t *spa); | |
235 | extern void ddt_unload(spa_t *spa); | |
236 | extern void ddt_sync(spa_t *spa, uint64_t txg); | |
237 | extern int ddt_walk(spa_t *spa, ddt_bookmark_t *ddb, ddt_entry_t *dde); | |
238 | extern int ddt_object_update(ddt_t *ddt, enum ddt_type type, | |
239 | enum ddt_class class, ddt_entry_t *dde, dmu_tx_t *tx); | |
240 | ||
241 | extern const ddt_ops_t ddt_zap_ops; | |
242 | ||
243 | #ifdef __cplusplus | |
244 | } | |
245 | #endif | |
246 | ||
247 | #endif /* _SYS_DDT_H */ |