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