1 /* 2 * CDDL HEADER START 3 * 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. 7 * 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. 12 * 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] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2014, 2016 by Delphix. All rights reserved. 24 * Copyright Saso Kiselkov 2013, All rights reserved. 25 */ 26 27 #ifndef _SYS_ZIO_CHECKSUM_H 28 #define _SYS_ZIO_CHECKSUM_H extern __attribute__((visibility("default"))) 29 30 #include <sys/zio.h> 31 #include <zfeature_common.h> 32 #include <zfs_fletcher.h> 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 struct abd; 39 40 /* 41 * Signature for checksum functions. 42 */ 43 typedef void zio_checksum_t(struct abd *abd, uint64_t size, 44 const void *ctx_template, zio_cksum_t *zcp); 45 typedef void *zio_checksum_tmpl_init_t(const zio_cksum_salt_t *salt); 46 typedef void zio_checksum_tmpl_free_t(void *ctx_template); 47 48 typedef enum zio_checksum_flags { 49 /* Strong enough for metadata? */ 50 ZCHECKSUM_FLAG_METADATA = (1 << 1), 51 /* ZIO embedded checksum */ 52 ZCHECKSUM_FLAG_EMBEDDED = (1 << 2), 53 /* Strong enough for dedup (without verification)? */ 54 ZCHECKSUM_FLAG_DEDUP = (1 << 3), 55 /* Uses salt value */ 56 ZCHECKSUM_FLAG_SALTED = (1 << 4), 57 /* Strong enough for nopwrite? */ 58 ZCHECKSUM_FLAG_NOPWRITE = (1 << 5) 59 } zio_checksum_flags_t; 60 61 typedef enum { 62 ZIO_CHECKSUM_NATIVE, 63 ZIO_CHECKSUM_BYTESWAP 64 } zio_byteorder_t; 65 66 typedef struct zio_abd_checksum_data { 67 zio_byteorder_t acd_byteorder; 68 fletcher_4_ctx_t *acd_ctx; 69 zio_cksum_t *acd_zcp; 70 void *acd_private; 71 } zio_abd_checksum_data_t; 72 73 typedef void zio_abd_checksum_init_t(zio_abd_checksum_data_t *); 74 typedef void zio_abd_checksum_fini_t(zio_abd_checksum_data_t *); 75 typedef int zio_abd_checksum_iter_t(void *, size_t, void *); 76 77 typedef const struct zio_abd_checksum_func { 78 zio_abd_checksum_init_t *acf_init; 79 zio_abd_checksum_fini_t *acf_fini; 80 zio_abd_checksum_iter_t *acf_iter; 81 } zio_abd_checksum_func_t; 82 83 /* 84 * Information about each checksum function. 85 */ 86 typedef const struct zio_checksum_info { 87 /* checksum function for each byteorder */ 88 zio_checksum_t *ci_func[2]; 89 zio_checksum_tmpl_init_t *ci_tmpl_init; 90 zio_checksum_tmpl_free_t *ci_tmpl_free; 91 zio_checksum_flags_t ci_flags; 92 char *ci_name; /* descriptive name */ 93 } zio_checksum_info_t; 94 95 typedef struct zio_bad_cksum { 96 zio_cksum_t zbc_expected; 97 zio_cksum_t zbc_actual; 98 const char *zbc_checksum_name; 99 uint8_t zbc_byteswapped; 100 uint8_t zbc_injected; 101 uint8_t zbc_has_cksum; /* expected/actual valid */ 102 } zio_bad_cksum_t; 103 104 _SYS_ZIO_CHECKSUM_H zio_checksum_info_t 105 zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS]; 106 107 /* 108 * Checksum routines. 109 */ 110 extern zio_checksum_t abd_checksum_SHA256; 111 extern zio_checksum_t abd_checksum_SHA512_native; 112 extern zio_checksum_t abd_checksum_SHA512_byteswap; 113 114 /* Skein */ 115 extern zio_checksum_t abd_checksum_skein_native; 116 extern zio_checksum_t abd_checksum_skein_byteswap; 117 extern zio_checksum_tmpl_init_t abd_checksum_skein_tmpl_init; 118 extern zio_checksum_tmpl_free_t abd_checksum_skein_tmpl_free; 119 120 /* Edon-R */ 121 extern zio_checksum_t abd_checksum_edonr_native; 122 extern zio_checksum_t abd_checksum_edonr_byteswap; 123 extern zio_checksum_tmpl_init_t abd_checksum_edonr_tmpl_init; 124 extern zio_checksum_tmpl_free_t abd_checksum_edonr_tmpl_free; 125 126 _SYS_ZIO_CHECKSUM_H zio_abd_checksum_func_t fletcher_4_abd_ops; 127 extern zio_checksum_t abd_fletcher_4_native; 128 extern zio_checksum_t abd_fletcher_4_byteswap; 129 130 extern int zio_checksum_equal(spa_t *, blkptr_t *, enum zio_checksum, 131 void *, uint64_t, uint64_t, zio_bad_cksum_t *); 132 extern void zio_checksum_compute(zio_t *, enum zio_checksum, 133 struct abd *, uint64_t); 134 extern int zio_checksum_error_impl(spa_t *, const blkptr_t *, enum zio_checksum, 135 struct abd *, uint64_t, uint64_t, zio_bad_cksum_t *); 136 extern int zio_checksum_error(zio_t *zio, zio_bad_cksum_t *out); 137 extern enum zio_checksum spa_dedup_checksum(spa_t *spa); 138 extern void zio_checksum_templates_free(spa_t *spa); 139 extern spa_feature_t zio_checksum_to_feature(enum zio_checksum cksum); 140 141 #ifdef __cplusplus 142 } 143 #endif 144 145 #endif /* _SYS_ZIO_CHECKSUM_H */ 146