1219089Spjd/* 2219089Spjd * CDDL HEADER START 3219089Spjd * 4219089Spjd * The contents of this file are subject to the terms of the 5219089Spjd * Common Development and Distribution License (the "License"). 6219089Spjd * You may not use this file except in compliance with the License. 7219089Spjd * 8219089Spjd * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9219089Spjd * or http://www.opensolaris.org/os/licensing. 10219089Spjd * See the License for the specific language governing permissions 11219089Spjd * and limitations under the License. 12219089Spjd * 13219089Spjd * When distributing Covered Code, include this CDDL HEADER in each 14219089Spjd * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15219089Spjd * If applicable, add the following below this CDDL HEADER, with the 16219089Spjd * fields enclosed by brackets "[]" replaced with your own identifying 17219089Spjd * information: Portions Copyright [yyyy] [name of copyright owner] 18219089Spjd * 19219089Spjd * CDDL HEADER END 20219089Spjd */ 21219089Spjd 22219089Spjd/* 23219089Spjd * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. 24219089Spjd */ 25219089Spjd 26219089Spjd#include <sys/zfs_context.h> 27219089Spjd#include <sys/spa.h> 28219089Spjd#include <sys/zio.h> 29219089Spjd#include <sys/ddt.h> 30219089Spjd#include <sys/zap.h> 31219089Spjd#include <sys/dmu_tx.h> 32219089Spjd 33219089Spjdint ddt_zap_leaf_blockshift = 12; 34219089Spjdint ddt_zap_indirect_blockshift = 12; 35219089Spjd 36219089Spjdstatic int 37219089Spjdddt_zap_create(objset_t *os, uint64_t *objectp, dmu_tx_t *tx, boolean_t prehash) 38219089Spjd{ 39219089Spjd zap_flags_t flags = ZAP_FLAG_HASH64 | ZAP_FLAG_UINT64_KEY; 40219089Spjd 41219089Spjd if (prehash) 42219089Spjd flags |= ZAP_FLAG_PRE_HASHED_KEY; 43219089Spjd 44219089Spjd *objectp = zap_create_flags(os, 0, flags, DMU_OT_DDT_ZAP, 45219089Spjd ddt_zap_leaf_blockshift, ddt_zap_indirect_blockshift, 46219089Spjd DMU_OT_NONE, 0, tx); 47219089Spjd 48219089Spjd return (*objectp == 0 ? ENOTSUP : 0); 49219089Spjd} 50219089Spjd 51219089Spjdstatic int 52219089Spjdddt_zap_destroy(objset_t *os, uint64_t object, dmu_tx_t *tx) 53219089Spjd{ 54219089Spjd return (zap_destroy(os, object, tx)); 55219089Spjd} 56219089Spjd 57219089Spjdstatic int 58219089Spjdddt_zap_lookup(objset_t *os, uint64_t object, ddt_entry_t *dde) 59219089Spjd{ 60219089Spjd uchar_t cbuf[sizeof (dde->dde_phys) + 1]; 61219089Spjd uint64_t one, csize; 62219089Spjd int error; 63219089Spjd 64219089Spjd error = zap_length_uint64(os, object, (uint64_t *)&dde->dde_key, 65219089Spjd DDT_KEY_WORDS, &one, &csize); 66219089Spjd if (error) 67219089Spjd return (error); 68219089Spjd 69219089Spjd ASSERT(one == 1); 70219089Spjd ASSERT(csize <= sizeof (cbuf)); 71219089Spjd 72219089Spjd error = zap_lookup_uint64(os, object, (uint64_t *)&dde->dde_key, 73219089Spjd DDT_KEY_WORDS, 1, csize, cbuf); 74219089Spjd if (error) 75219089Spjd return (error); 76219089Spjd 77219089Spjd ddt_decompress(cbuf, dde->dde_phys, csize, sizeof (dde->dde_phys)); 78219089Spjd 79219089Spjd return (0); 80219089Spjd} 81219089Spjd 82219089Spjdstatic void 83219089Spjdddt_zap_prefetch(objset_t *os, uint64_t object, ddt_entry_t *dde) 84219089Spjd{ 85219089Spjd (void) zap_prefetch_uint64(os, object, (uint64_t *)&dde->dde_key, 86219089Spjd DDT_KEY_WORDS); 87219089Spjd} 88219089Spjd 89219089Spjdstatic int 90219089Spjdddt_zap_update(objset_t *os, uint64_t object, ddt_entry_t *dde, dmu_tx_t *tx) 91219089Spjd{ 92219089Spjd uchar_t cbuf[sizeof (dde->dde_phys) + 1]; 93219089Spjd uint64_t csize; 94219089Spjd 95219089Spjd csize = ddt_compress(dde->dde_phys, cbuf, 96219089Spjd sizeof (dde->dde_phys), sizeof (cbuf)); 97219089Spjd 98219089Spjd return (zap_update_uint64(os, object, (uint64_t *)&dde->dde_key, 99219089Spjd DDT_KEY_WORDS, 1, csize, cbuf, tx)); 100219089Spjd} 101219089Spjd 102219089Spjdstatic int 103219089Spjdddt_zap_remove(objset_t *os, uint64_t object, ddt_entry_t *dde, dmu_tx_t *tx) 104219089Spjd{ 105219089Spjd return (zap_remove_uint64(os, object, (uint64_t *)&dde->dde_key, 106219089Spjd DDT_KEY_WORDS, tx)); 107219089Spjd} 108219089Spjd 109219089Spjdstatic int 110219089Spjdddt_zap_walk(objset_t *os, uint64_t object, ddt_entry_t *dde, uint64_t *walk) 111219089Spjd{ 112219089Spjd zap_cursor_t zc; 113219089Spjd zap_attribute_t za; 114219089Spjd int error; 115219089Spjd 116219089Spjd zap_cursor_init_serialized(&zc, os, object, *walk); 117219089Spjd if ((error = zap_cursor_retrieve(&zc, &za)) == 0) { 118219089Spjd uchar_t cbuf[sizeof (dde->dde_phys) + 1]; 119219089Spjd uint64_t csize = za.za_num_integers; 120219089Spjd ASSERT(za.za_integer_length == 1); 121219089Spjd error = zap_lookup_uint64(os, object, (uint64_t *)za.za_name, 122219089Spjd DDT_KEY_WORDS, 1, csize, cbuf); 123219089Spjd ASSERT(error == 0); 124219089Spjd if (error == 0) { 125219089Spjd ddt_decompress(cbuf, dde->dde_phys, csize, 126219089Spjd sizeof (dde->dde_phys)); 127219089Spjd dde->dde_key = *(ddt_key_t *)za.za_name; 128219089Spjd } 129219089Spjd zap_cursor_advance(&zc); 130219089Spjd *walk = zap_cursor_serialize(&zc); 131219089Spjd } 132219089Spjd zap_cursor_fini(&zc); 133219089Spjd return (error); 134219089Spjd} 135219089Spjd 136245264Sdelphijstatic int 137245264Sdelphijddt_zap_count(objset_t *os, uint64_t object, uint64_t *count) 138219089Spjd{ 139219089Spjd 140245264Sdelphij return (zap_count(os, object, count)); 141219089Spjd} 142219089Spjd 143219089Spjdconst ddt_ops_t ddt_zap_ops = { 144219089Spjd "zap", 145219089Spjd ddt_zap_create, 146219089Spjd ddt_zap_destroy, 147219089Spjd ddt_zap_lookup, 148219089Spjd ddt_zap_prefetch, 149219089Spjd ddt_zap_update, 150219089Spjd ddt_zap_remove, 151219089Spjd ddt_zap_walk, 152219089Spjd ddt_zap_count, 153219089Spjd}; 154