/* * 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 https://opensource.org/licenses/CDDL-1.0. * 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. * Copyright (c) 2016 by Delphix. All rights reserved. */ #ifndef _SYS_DDT_H #define _SYS_DDT_H #include #include #include #include #include #ifdef __cplusplus extern "C" { #endif struct abd; /* * On-disk DDT formats, in the desired search order (newest version first). */ typedef enum { DDT_TYPE_ZAP = 0, DDT_TYPES } ddt_type_t; _Static_assert(DDT_TYPES <= UINT8_MAX, "ddt_type_t must fit in a uint8_t"); /* New and updated entries recieve this type, see ddt_sync_entry() */ #define DDT_TYPE_DEFAULT (DDT_TYPE_ZAP) /* * DDT classes, in the desired search order (highest replication level first). */ typedef enum { DDT_CLASS_DITTO = 0, DDT_CLASS_DUPLICATE, DDT_CLASS_UNIQUE, DDT_CLASSES } ddt_class_t; _Static_assert(DDT_CLASSES < UINT8_MAX, "ddt_class_t must fit in a uint8_t"); /* * On-disk ddt entry: key (name) and physical storage (value). */ typedef struct { zio_cksum_t ddk_cksum; /* 256-bit block checksum */ /* * Encoded with logical & physical size, encryption, and compression, * as follows: * +-------+-------+-------+-------+-------+-------+-------+-------+ * | 0 | 0 | 0 |X| comp| PSIZE | LSIZE | * +-------+-------+-------+-------+-------+-------+-------+-------+ */ uint64_t ddk_prop; } ddt_key_t; #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, 7) #define DDK_SET_COMPRESS(ddk, x) BF64_SET((ddk)->ddk_prop, 32, 7, x) #define DDK_GET_CRYPT(ddk) BF64_GET((ddk)->ddk_prop, 39, 1) #define DDK_SET_CRYPT(ddk, x) BF64_SET((ddk)->ddk_prop, 39, 1, x) typedef struct { dva_t ddp_dva[SPA_DVAS_PER_BP]; uint64_t ddp_refcnt; uint64_t ddp_phys_birth; } ddt_phys_t; /* * Note, we no longer generate new DDT_PHYS_DITTO-type blocks. However, * we maintain the ability to free existing dedup-ditto blocks. */ 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 */ /* State flags for dde_flags */ #define DDE_FLAG_LOADED (1 << 0) /* entry ready for use */ typedef struct { /* key must be first for ddt_key_compare */ ddt_key_t dde_key; ddt_phys_t dde_phys[DDT_PHYS_TYPES]; zio_t *dde_lead_zio[DDT_PHYS_TYPES]; struct abd *dde_repair_abd; ddt_type_t dde_type; ddt_class_t dde_class; uint8_t dde_flags; kcondvar_t dde_cv; avl_node_t dde_node; } ddt_entry_t; /* * In-core ddt */ typedef struct { 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]; } ddt_t; /* * In-core and on-disk bookmark for DDT walks */ typedef struct { uint64_t ddb_class; uint64_t ddb_type; uint64_t ddb_checksum; uint64_t ddb_cursor; } ddt_bookmark_t; 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_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 ddt_phys_t *ddt_phys_select(const ddt_entry_t *dde, const blkptr_t *bp); 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 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 void ddt_init(void); extern void ddt_fini(void); 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, ddt_class_t 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_key_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 boolean_t ddt_addref(spa_t *spa, const blkptr_t *bp); #ifdef __cplusplus } #endif #endif /* _SYS_DDT_H */