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 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
29 #include <sys/sysmacros.h>
30 #include <sys/types.h>
31 #include <sys/fs/zfs.h>
40 * On-disk DDT formats, in the desired search order (newest version first).
48 * DDT classes, in the desired search order (highest replication level first).
57 #define DDT_TYPE_CURRENT 0
59 #define DDT_COMPRESS_BYTEORDER_MASK 0x80
60 #define DDT_COMPRESS_FUNCTION_MASK 0x7f
65 typedef struct ddt_stat
{
66 uint64_t dds_blocks
; /* blocks */
67 uint64_t dds_lsize
; /* logical size */
68 uint64_t dds_psize
; /* physical size */
69 uint64_t dds_dsize
; /* deflated allocated size */
70 uint64_t dds_ref_blocks
; /* referenced blocks */
71 uint64_t dds_ref_lsize
; /* referenced lsize * refcnt */
72 uint64_t dds_ref_psize
; /* referenced psize * refcnt */
73 uint64_t dds_ref_dsize
; /* referenced dsize * refcnt */
76 typedef struct ddt_histogram
{
77 ddt_stat_t ddh_stat
[64]; /* power-of-two histogram buckets */
81 * On-disk ddt entry: key (name) and physical storage (value).
83 typedef struct ddt_key
{
84 zio_cksum_t ddk_cksum
; /* 256-bit block checksum */
85 uint64_t ddk_prop
; /* LSIZE, PSIZE, compression */
91 * +-------+-------+-------+-------+-------+-------+-------+-------+
92 * | 0 | 0 | 0 | comp | PSIZE | LSIZE |
93 * +-------+-------+-------+-------+-------+-------+-------+-------+
95 #define DDK_GET_LSIZE(ddk) \
96 BF64_GET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
97 #define DDK_SET_LSIZE(ddk, x) \
98 BF64_SET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
100 #define DDK_GET_PSIZE(ddk) \
101 BF64_GET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
102 #define DDK_SET_PSIZE(ddk, x) \
103 BF64_SET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
105 #define DDK_GET_COMPRESS(ddk) BF64_GET((ddk)->ddk_prop, 32, 8)
106 #define DDK_SET_COMPRESS(ddk, x) BF64_SET((ddk)->ddk_prop, 32, 8, x)
108 #define DDT_KEY_WORDS (sizeof (ddt_key_t) / sizeof (uint64_t))
110 typedef struct ddt_phys
{
111 dva_t ddp_dva
[SPA_DVAS_PER_BP
];
113 uint64_t ddp_phys_birth
;
129 ddt_phys_t dde_phys
[DDT_PHYS_TYPES
];
130 zio_t
*dde_lead_zio
[DDT_PHYS_TYPES
];
131 void *dde_repair_data
;
132 enum ddt_type dde_type
;
133 enum ddt_class dde_class
;
146 avl_tree_t ddt_repair_tree
;
147 enum zio_checksum ddt_checksum
;
150 uint64_t ddt_stat_object
;
151 uint64_t ddt_object
[DDT_TYPES
][DDT_CLASSES
];
152 ddt_histogram_t ddt_histogram
[DDT_TYPES
][DDT_CLASSES
];
156 typedef struct ddt_ops
{
157 char ddt_op_name
[32];
158 int (*ddt_op_create
)(objset_t
*os
, uint64_t *object
, dmu_tx_t
*tx
,
160 int (*ddt_op_destroy
)(objset_t
*os
, uint64_t object
, dmu_tx_t
*tx
);
161 int (*ddt_op_lookup
)(objset_t
*os
, uint64_t object
, ddt_entry_t
*dde
);
162 int (*ddt_op_update
)(objset_t
*os
, uint64_t object
, ddt_entry_t
*dde
,
164 int (*ddt_op_remove
)(objset_t
*os
, uint64_t object
, ddt_entry_t
*dde
,
166 int (*ddt_op_walk
)(objset_t
*os
, uint64_t object
, ddt_entry_t
*dde
,
168 uint64_t (*ddt_op_count
)(objset_t
*os
, uint64_t object
);
171 #define DDT_NAMELEN 80
173 extern void ddt_object_name(ddt_t
*ddt
, enum ddt_type type
,
174 enum ddt_class
class, char *name
);
175 extern int ddt_object_walk(ddt_t
*ddt
, enum ddt_type type
,
176 enum ddt_class
class, ddt_entry_t
*dde
, uint64_t *walk
);
177 extern uint64_t ddt_object_count(ddt_t
*ddt
, enum ddt_type type
,
178 enum ddt_class
class);
179 extern int ddt_object_info(ddt_t
*ddt
, enum ddt_type type
,
180 enum ddt_class
class, dmu_object_info_t
*);
181 extern boolean_t
ddt_object_exists(ddt_t
*ddt
, enum ddt_type type
,
182 enum ddt_class
class);
184 extern void ddt_bp_fill(const ddt_phys_t
*ddp
, blkptr_t
*bp
,
186 extern void ddt_bp_create(const ddt_t
*ddt
, const ddt_key_t
*ddk
,
187 const ddt_phys_t
*ddp
, blkptr_t
*bp
);
189 extern void ddt_key_fill(ddt_key_t
*ddk
, const blkptr_t
*bp
);
191 extern void ddt_phys_fill(ddt_phys_t
*ddp
, const blkptr_t
*bp
);
192 extern void ddt_phys_clear(ddt_phys_t
*ddp
);
193 extern void ddt_phys_addref(ddt_phys_t
*ddp
);
194 extern void ddt_phys_decref(ddt_phys_t
*ddp
);
195 extern void ddt_phys_free(ddt_t
*ddt
, ddt_key_t
*ddk
, ddt_phys_t
*ddp
,
197 extern ddt_phys_t
*ddt_phys_select(const ddt_entry_t
*dde
, const blkptr_t
*bp
);
198 extern uint64_t ddt_phys_total_refcnt(const ddt_entry_t
*dde
);
200 extern void ddt_stat_add(ddt_stat_t
*dst
, const ddt_stat_t
*src
, uint64_t neg
);
202 extern void ddt_histogram_add(ddt_histogram_t
*dst
, const ddt_histogram_t
*src
);
203 extern void ddt_histogram_stat(ddt_stat_t
*dds
, const ddt_histogram_t
*ddh
);
204 extern boolean_t
ddt_histogram_empty(const ddt_histogram_t
*ddh
);
206 extern uint64_t ddt_get_dedup_dspace(spa_t
*spa
);
207 extern uint64_t ddt_get_pool_dedup_ratio(spa_t
*spa
);
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
);
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
);
216 extern ddt_t
*ddt_select(spa_t
*spa
, const blkptr_t
*bp
);
217 extern ddt_t
*ddt_select_by_checksum(spa_t
*spa
, enum zio_checksum c
);
219 extern void ddt_enter(ddt_t
*ddt
);
220 extern void ddt_exit(ddt_t
*ddt
);
221 extern ddt_entry_t
*ddt_lookup(ddt_t
*ddt
, const blkptr_t
*bp
, boolean_t add
);
222 extern void ddt_remove(ddt_t
*ddt
, ddt_entry_t
*dde
);
224 extern ddt_entry_t
*ddt_repair_start(ddt_t
*ddt
, const blkptr_t
*bp
);
225 extern void ddt_repair_done(ddt_t
*ddt
, ddt_entry_t
*dde
);
227 extern int ddt_entry_compare(const void *x1
, const void *x2
);
229 extern void ddt_create(spa_t
*spa
);
230 extern int ddt_load(spa_t
*spa
);
231 extern void ddt_unload(spa_t
*spa
);
232 extern void ddt_sync(spa_t
*spa
, uint64_t txg
);
234 extern const ddt_ops_t ddt_zap_ops
;
240 #endif /* _SYS_DDT_H */