247 lines
7.5 KiB
C
247 lines
7.5 KiB
C
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
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*/
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#ifndef _SYS_DDT_H
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#define _SYS_DDT_H
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#include <sys/sysmacros.h>
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#include <sys/types.h>
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#include <sys/fs/zfs.h>
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#include <sys/zio.h>
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#include <sys/dmu.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* On-disk DDT formats, in the desired search order (newest version first).
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*/
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enum ddt_type {
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DDT_TYPE_ZAP = 0,
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DDT_TYPES
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};
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/*
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* DDT classes, in the desired search order (highest replication level first).
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*/
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enum ddt_class {
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DDT_CLASS_DITTO = 0,
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DDT_CLASS_DUPLICATE,
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DDT_CLASS_UNIQUE,
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DDT_CLASSES
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};
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#define DDT_TYPE_CURRENT 0
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#define DDT_COMPRESS_BYTEORDER_MASK 0x80
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#define DDT_COMPRESS_FUNCTION_MASK 0x7f
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/*
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* On-disk ddt entry: key (name) and physical storage (value).
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*/
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typedef struct ddt_key {
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zio_cksum_t ddk_cksum; /* 256-bit block checksum */
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uint64_t ddk_prop; /* LSIZE, PSIZE, compression */
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} ddt_key_t;
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/*
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* ddk_prop layout:
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*
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* | 0 | 0 | 0 | comp | PSIZE | LSIZE |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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*/
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#define DDK_GET_LSIZE(ddk) \
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BF64_GET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
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#define DDK_SET_LSIZE(ddk, x) \
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BF64_SET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
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#define DDK_GET_PSIZE(ddk) \
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BF64_GET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
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#define DDK_SET_PSIZE(ddk, x) \
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BF64_SET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
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#define DDK_GET_COMPRESS(ddk) BF64_GET((ddk)->ddk_prop, 32, 8)
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#define DDK_SET_COMPRESS(ddk, x) BF64_SET((ddk)->ddk_prop, 32, 8, x)
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#define DDT_KEY_WORDS (sizeof (ddt_key_t) / sizeof (uint64_t))
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typedef struct ddt_phys {
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dva_t ddp_dva[SPA_DVAS_PER_BP];
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uint64_t ddp_refcnt;
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uint64_t ddp_phys_birth;
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} ddt_phys_t;
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enum ddt_phys_type {
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DDT_PHYS_DITTO = 0,
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DDT_PHYS_SINGLE = 1,
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DDT_PHYS_DOUBLE = 2,
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DDT_PHYS_TRIPLE = 3,
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DDT_PHYS_TYPES
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};
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/*
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* In-core ddt entry
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*/
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struct ddt_entry {
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ddt_key_t dde_key;
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ddt_phys_t dde_phys[DDT_PHYS_TYPES];
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zio_t *dde_lead_zio[DDT_PHYS_TYPES];
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void *dde_repair_data;
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enum ddt_type dde_type;
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enum ddt_class dde_class;
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uint8_t dde_loading;
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uint8_t dde_loaded;
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kcondvar_t dde_cv;
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avl_node_t dde_node;
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};
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/*
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* In-core ddt
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*/
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struct ddt {
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kmutex_t ddt_lock;
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avl_tree_t ddt_tree;
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avl_tree_t ddt_repair_tree;
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enum zio_checksum ddt_checksum;
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spa_t *ddt_spa;
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objset_t *ddt_os;
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uint64_t ddt_stat_object;
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uint64_t ddt_object[DDT_TYPES][DDT_CLASSES];
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ddt_histogram_t ddt_histogram[DDT_TYPES][DDT_CLASSES];
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ddt_histogram_t ddt_histogram_cache[DDT_TYPES][DDT_CLASSES];
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ddt_object_t ddt_object_stats[DDT_TYPES][DDT_CLASSES];
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avl_node_t ddt_node;
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};
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/*
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* In-core and on-disk bookmark for DDT walks
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*/
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typedef struct ddt_bookmark {
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uint64_t ddb_class;
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uint64_t ddb_type;
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uint64_t ddb_checksum;
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uint64_t ddb_cursor;
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} ddt_bookmark_t;
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/*
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* Ops vector to access a specific DDT object type.
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*/
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typedef struct ddt_ops {
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char ddt_op_name[32];
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int (*ddt_op_create)(objset_t *os, uint64_t *object, dmu_tx_t *tx,
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boolean_t prehash);
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int (*ddt_op_destroy)(objset_t *os, uint64_t object, dmu_tx_t *tx);
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int (*ddt_op_lookup)(objset_t *os, uint64_t object, ddt_entry_t *dde);
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void (*ddt_op_prefetch)(objset_t *os, uint64_t object,
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ddt_entry_t *dde);
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int (*ddt_op_update)(objset_t *os, uint64_t object, ddt_entry_t *dde,
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dmu_tx_t *tx);
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int (*ddt_op_remove)(objset_t *os, uint64_t object, ddt_entry_t *dde,
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dmu_tx_t *tx);
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int (*ddt_op_walk)(objset_t *os, uint64_t object, ddt_entry_t *dde,
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uint64_t *walk);
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uint64_t (*ddt_op_count)(objset_t *os, uint64_t object);
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} ddt_ops_t;
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#define DDT_NAMELEN 80
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extern void ddt_object_name(ddt_t *ddt, enum ddt_type type,
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enum ddt_class class, char *name);
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extern int ddt_object_walk(ddt_t *ddt, enum ddt_type type,
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enum ddt_class class, uint64_t *walk, ddt_entry_t *dde);
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extern uint64_t ddt_object_count(ddt_t *ddt, enum ddt_type type,
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enum ddt_class class);
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extern int ddt_object_info(ddt_t *ddt, enum ddt_type type,
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enum ddt_class class, dmu_object_info_t *);
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extern boolean_t ddt_object_exists(ddt_t *ddt, enum ddt_type type,
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enum ddt_class class);
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extern void ddt_bp_fill(const ddt_phys_t *ddp, blkptr_t *bp,
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uint64_t txg);
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extern void ddt_bp_create(enum zio_checksum checksum, const ddt_key_t *ddk,
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const ddt_phys_t *ddp, blkptr_t *bp);
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extern void ddt_key_fill(ddt_key_t *ddk, const blkptr_t *bp);
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extern void ddt_phys_fill(ddt_phys_t *ddp, const blkptr_t *bp);
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extern void ddt_phys_clear(ddt_phys_t *ddp);
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extern void ddt_phys_addref(ddt_phys_t *ddp);
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extern void ddt_phys_decref(ddt_phys_t *ddp);
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extern void ddt_phys_free(ddt_t *ddt, ddt_key_t *ddk, ddt_phys_t *ddp,
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uint64_t txg);
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extern ddt_phys_t *ddt_phys_select(const ddt_entry_t *dde, const blkptr_t *bp);
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extern uint64_t ddt_phys_total_refcnt(const ddt_entry_t *dde);
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extern void ddt_stat_add(ddt_stat_t *dst, const ddt_stat_t *src, uint64_t neg);
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extern void ddt_histogram_add(ddt_histogram_t *dst, const ddt_histogram_t *src);
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extern void ddt_histogram_stat(ddt_stat_t *dds, const ddt_histogram_t *ddh);
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extern boolean_t ddt_histogram_empty(const ddt_histogram_t *ddh);
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extern void ddt_get_dedup_object_stats(spa_t *spa, ddt_object_t *ddo);
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extern void ddt_get_dedup_histogram(spa_t *spa, ddt_histogram_t *ddh);
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extern void ddt_get_dedup_stats(spa_t *spa, ddt_stat_t *dds_total);
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extern uint64_t ddt_get_dedup_dspace(spa_t *spa);
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extern uint64_t ddt_get_pool_dedup_ratio(spa_t *spa);
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extern int ddt_ditto_copies_needed(ddt_t *ddt, ddt_entry_t *dde,
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ddt_phys_t *ddp_willref);
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extern int ddt_ditto_copies_present(ddt_entry_t *dde);
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extern size_t ddt_compress(void *src, uchar_t *dst, size_t s_len, size_t d_len);
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extern void ddt_decompress(uchar_t *src, void *dst, size_t s_len, size_t d_len);
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extern ddt_t *ddt_select(spa_t *spa, const blkptr_t *bp);
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extern void ddt_enter(ddt_t *ddt);
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extern void ddt_exit(ddt_t *ddt);
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extern ddt_entry_t *ddt_lookup(ddt_t *ddt, const blkptr_t *bp, boolean_t add);
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extern void ddt_prefetch(spa_t *spa, const blkptr_t *bp);
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extern void ddt_remove(ddt_t *ddt, ddt_entry_t *dde);
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extern boolean_t ddt_class_contains(spa_t *spa, enum ddt_class max_class,
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const blkptr_t *bp);
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extern ddt_entry_t *ddt_repair_start(ddt_t *ddt, const blkptr_t *bp);
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extern void ddt_repair_done(ddt_t *ddt, ddt_entry_t *dde);
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extern int ddt_entry_compare(const void *x1, const void *x2);
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extern void ddt_create(spa_t *spa);
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extern int ddt_load(spa_t *spa);
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extern void ddt_unload(spa_t *spa);
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extern void ddt_sync(spa_t *spa, uint64_t txg);
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extern int ddt_walk(spa_t *spa, ddt_bookmark_t *ddb, ddt_entry_t *dde);
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extern int ddt_object_update(ddt_t *ddt, enum ddt_type type,
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enum ddt_class class, ddt_entry_t *dde, dmu_tx_t *tx);
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extern const ddt_ops_t ddt_zap_ops;
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_DDT_H */
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