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.
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.
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]
22 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
28 #include <sys/sysmacros.h>
29 #include <sys/types.h>
30 #include <sys/fs/zfs.h>
39 * On-disk DDT formats, in the desired search order (newest version first).
47 * DDT classes, in the desired search order (highest replication level first).
56 #define DDT_TYPE_CURRENT 0
58 #define DDT_COMPRESS_BYTEORDER_MASK 0x80
59 #define DDT_COMPRESS_FUNCTION_MASK 0x7f
62 * On-disk ddt entry: key (name) and physical storage (value).
64 typedef struct ddt_key {
65 zio_cksum_t ddk_cksum; /* 256-bit block checksum */
66 uint64_t ddk_prop; /* LSIZE, PSIZE, compression */
72 * +-------+-------+-------+-------+-------+-------+-------+-------+
73 * | 0 | 0 | 0 | comp | PSIZE | LSIZE |
74 * +-------+-------+-------+-------+-------+-------+-------+-------+
76 #define DDK_GET_LSIZE(ddk) \
77 BF64_GET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
78 #define DDK_SET_LSIZE(ddk, x) \
79 BF64_SET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
81 #define DDK_GET_PSIZE(ddk) \
82 BF64_GET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
83 #define DDK_SET_PSIZE(ddk, x) \
84 BF64_SET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
86 #define DDK_GET_COMPRESS(ddk) BF64_GET((ddk)->ddk_prop, 32, 8)
87 #define DDK_SET_COMPRESS(ddk, x) BF64_SET((ddk)->ddk_prop, 32, 8, x)
89 #define DDT_KEY_WORDS (sizeof (ddt_key_t) / sizeof (uint64_t))
91 typedef struct ddt_phys {
92 dva_t ddp_dva[SPA_DVAS_PER_BP];
94 uint64_t ddp_phys_birth;
110 ddt_phys_t dde_phys[DDT_PHYS_TYPES];
111 zio_t *dde_lead_zio[DDT_PHYS_TYPES];
112 void *dde_repair_data;
113 enum ddt_type dde_type;
114 enum ddt_class dde_class;
127 avl_tree_t ddt_repair_tree;
128 enum zio_checksum ddt_checksum;
131 uint64_t ddt_stat_object;
132 uint64_t ddt_object[DDT_TYPES][DDT_CLASSES];
133 ddt_histogram_t ddt_histogram[DDT_TYPES][DDT_CLASSES];
134 ddt_histogram_t ddt_histogram_cache[DDT_TYPES][DDT_CLASSES];
135 ddt_object_t ddt_object_stats[DDT_TYPES][DDT_CLASSES];
140 * In-core and on-disk bookmark for DDT walks
142 typedef struct ddt_bookmark {
145 uint64_t ddb_checksum;
150 * Ops vector to access a specific DDT object type.
152 typedef struct ddt_ops {
153 char ddt_op_name[32];
154 int (*ddt_op_create)(objset_t *os, uint64_t *object, dmu_tx_t *tx,
156 int (*ddt_op_destroy)(objset_t *os, uint64_t object, dmu_tx_t *tx);
157 int (*ddt_op_lookup)(objset_t *os, uint64_t object, ddt_entry_t *dde);
158 void (*ddt_op_prefetch)(objset_t *os, uint64_t object,
160 int (*ddt_op_update)(objset_t *os, uint64_t object, ddt_entry_t *dde,
162 int (*ddt_op_remove)(objset_t *os, uint64_t object, ddt_entry_t *dde,
164 int (*ddt_op_walk)(objset_t *os, uint64_t object, ddt_entry_t *dde,
166 uint64_t (*ddt_op_count)(objset_t *os, uint64_t object);
169 #define DDT_NAMELEN 80
171 extern void ddt_object_name(ddt_t *ddt, enum ddt_type type,
172 enum ddt_class class, char *name);
173 extern int ddt_object_walk(ddt_t *ddt, enum ddt_type type,
174 enum ddt_class class, uint64_t *walk, ddt_entry_t *dde);
175 extern uint64_t ddt_object_count(ddt_t *ddt, enum ddt_type type,
176 enum ddt_class class);
177 extern int ddt_object_info(ddt_t *ddt, enum ddt_type type,
178 enum ddt_class class, dmu_object_info_t *);
179 extern boolean_t ddt_object_exists(ddt_t *ddt, enum ddt_type type,
180 enum ddt_class class);
182 extern void ddt_bp_fill(const ddt_phys_t *ddp, blkptr_t *bp,
184 extern void ddt_bp_create(enum zio_checksum checksum, const ddt_key_t *ddk,
185 const ddt_phys_t *ddp, blkptr_t *bp);
187 extern void ddt_key_fill(ddt_key_t *ddk, const blkptr_t *bp);
189 extern void ddt_phys_fill(ddt_phys_t *ddp, const blkptr_t *bp);
190 extern void ddt_phys_clear(ddt_phys_t *ddp);
191 extern void ddt_phys_addref(ddt_phys_t *ddp);
192 extern void ddt_phys_decref(ddt_phys_t *ddp);
193 extern void ddt_phys_free(ddt_t *ddt, ddt_key_t *ddk, ddt_phys_t *ddp,
195 extern ddt_phys_t *ddt_phys_select(const ddt_entry_t *dde, const blkptr_t *bp);
196 extern uint64_t ddt_phys_total_refcnt(const ddt_entry_t *dde);
198 extern void ddt_stat_add(ddt_stat_t *dst, const ddt_stat_t *src, uint64_t neg);
200 extern void ddt_histogram_add(ddt_histogram_t *dst, const ddt_histogram_t *src);
201 extern void ddt_histogram_stat(ddt_stat_t *dds, const ddt_histogram_t *ddh);
202 extern boolean_t ddt_histogram_empty(const ddt_histogram_t *ddh);
203 extern void ddt_get_dedup_object_stats(spa_t *spa, ddt_object_t *ddo);
204 extern void ddt_get_dedup_histogram(spa_t *spa, ddt_histogram_t *ddh);
205 extern void ddt_get_dedup_stats(spa_t *spa, ddt_stat_t *dds_total);
207 extern uint64_t ddt_get_dedup_dspace(spa_t *spa);
208 extern uint64_t ddt_get_pool_dedup_ratio(spa_t *spa);
210 extern int ddt_ditto_copies_needed(ddt_t *ddt, ddt_entry_t *dde,
211 ddt_phys_t *ddp_willref);
212 extern int ddt_ditto_copies_present(ddt_entry_t *dde);
214 extern size_t ddt_compress(void *src, uchar_t *dst, size_t s_len, size_t d_len);
215 extern void ddt_decompress(uchar_t *src, void *dst, size_t s_len, size_t d_len);
217 extern ddt_t *ddt_select(spa_t *spa, const blkptr_t *bp);
218 extern void ddt_enter(ddt_t *ddt);
219 extern void ddt_exit(ddt_t *ddt);
220 extern ddt_entry_t *ddt_lookup(ddt_t *ddt, const blkptr_t *bp, boolean_t add);
221 extern void ddt_prefetch(spa_t *spa, const blkptr_t *bp);
222 extern void ddt_remove(ddt_t *ddt, ddt_entry_t *dde);
224 extern boolean_t ddt_class_contains(spa_t *spa, enum ddt_class max_class,
227 extern ddt_entry_t *ddt_repair_start(ddt_t *ddt, const blkptr_t *bp);
228 extern void ddt_repair_done(ddt_t *ddt, ddt_entry_t *dde);
230 extern int ddt_entry_compare(const void *x1, const void *x2);
232 extern void ddt_create(spa_t *spa);
233 extern int ddt_load(spa_t *spa);
234 extern void ddt_unload(spa_t *spa);
235 extern void ddt_sync(spa_t *spa, uint64_t txg);
236 extern int ddt_walk(spa_t *spa, ddt_bookmark_t *ddb, ddt_entry_t *dde);
237 extern int ddt_object_update(ddt_t *ddt, enum ddt_type type,
238 enum ddt_class class, ddt_entry_t *dde, dmu_tx_t *tx);
240 extern const ddt_ops_t ddt_zap_ops;
246 #endif /* _SYS_DDT_H */