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.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or https://opensource.org/licenses/CDDL-1.0.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
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]
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 (c) 2013 Saso Kiselkov, All rights reserved.
25 * Copyright (c) 2021 Tino Reichardt <milky-zfs@mcmilk.de>
28 #ifndef _SYS_ZIO_CHECKSUM_H
29 #define _SYS_ZIO_CHECKSUM_H extern __attribute__((visibility("default")))
32 #include <zfeature_common.h>
33 #include <zfs_fletcher.h>
42 * Signature for checksum functions.
44 typedef void zio_checksum_t(struct abd *abd, uint64_t size,
45 const void *ctx_template, zio_cksum_t *zcp);
46 typedef void *zio_checksum_tmpl_init_t(const zio_cksum_salt_t *salt);
47 typedef void zio_checksum_tmpl_free_t(void *ctx_template);
49 typedef enum zio_checksum_flags {
50 /* Strong enough for metadata? */
51 ZCHECKSUM_FLAG_METADATA = (1 << 1),
52 /* ZIO embedded checksum */
53 ZCHECKSUM_FLAG_EMBEDDED = (1 << 2),
54 /* Strong enough for dedup (without verification)? */
55 ZCHECKSUM_FLAG_DEDUP = (1 << 3),
57 ZCHECKSUM_FLAG_SALTED = (1 << 4),
58 /* Strong enough for nopwrite? */
59 ZCHECKSUM_FLAG_NOPWRITE = (1 << 5)
60 } zio_checksum_flags_t;
67 typedef struct zio_abd_checksum_data {
68 zio_byteorder_t acd_byteorder;
69 fletcher_4_ctx_t *acd_ctx;
72 } zio_abd_checksum_data_t;
74 typedef void zio_abd_checksum_init_t(zio_abd_checksum_data_t *);
75 typedef void zio_abd_checksum_fini_t(zio_abd_checksum_data_t *);
76 typedef int zio_abd_checksum_iter_t(void *, size_t, void *);
78 typedef const struct zio_abd_checksum_func {
79 zio_abd_checksum_init_t *acf_init;
80 zio_abd_checksum_fini_t *acf_fini;
81 zio_abd_checksum_iter_t *acf_iter;
82 } zio_abd_checksum_func_t;
85 * Information about each checksum function.
87 typedef const struct zio_checksum_info {
88 /* checksum function for each byteorder */
89 zio_checksum_t *ci_func[2];
90 zio_checksum_tmpl_init_t *ci_tmpl_init;
91 zio_checksum_tmpl_free_t *ci_tmpl_free;
92 zio_checksum_flags_t ci_flags;
93 const char *ci_name; /* descriptive name */
94 } zio_checksum_info_t;
96 typedef struct zio_bad_cksum {
97 zio_cksum_t zbc_expected;
98 zio_cksum_t zbc_actual;
99 const char *zbc_checksum_name;
100 uint8_t zbc_byteswapped;
101 uint8_t zbc_injected;
102 uint8_t zbc_has_cksum; /* expected/actual valid */
105 _SYS_ZIO_CHECKSUM_H zio_checksum_info_t
106 zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS];
113 extern zio_checksum_t abd_checksum_sha256;
114 extern zio_checksum_t abd_checksum_sha512_native;
115 extern zio_checksum_t abd_checksum_sha512_byteswap;
118 extern zio_checksum_t abd_checksum_skein_native;
119 extern zio_checksum_t abd_checksum_skein_byteswap;
120 extern zio_checksum_tmpl_init_t abd_checksum_skein_tmpl_init;
121 extern zio_checksum_tmpl_free_t abd_checksum_skein_tmpl_free;
124 extern zio_checksum_t abd_checksum_edonr_native;
125 extern zio_checksum_t abd_checksum_edonr_byteswap;
126 extern zio_checksum_tmpl_init_t abd_checksum_edonr_tmpl_init;
127 extern zio_checksum_tmpl_free_t abd_checksum_edonr_tmpl_free;
130 extern zio_checksum_t abd_checksum_blake3_native;
131 extern zio_checksum_t abd_checksum_blake3_byteswap;
132 extern zio_checksum_tmpl_init_t abd_checksum_blake3_tmpl_init;
133 extern zio_checksum_tmpl_free_t abd_checksum_blake3_tmpl_free;
136 _SYS_ZIO_CHECKSUM_H zio_abd_checksum_func_t fletcher_4_abd_ops;
137 extern zio_checksum_t abd_fletcher_4_native;
138 extern zio_checksum_t abd_fletcher_4_byteswap;
140 extern int zio_checksum_equal(spa_t *, blkptr_t *, enum zio_checksum,
141 void *, uint64_t, uint64_t, zio_bad_cksum_t *);
142 extern void zio_checksum_compute(zio_t *, enum zio_checksum,
143 struct abd *, uint64_t);
144 extern int zio_checksum_error_impl(spa_t *, const blkptr_t *, enum zio_checksum,
145 struct abd *, uint64_t, uint64_t, zio_bad_cksum_t *);
146 extern int zio_checksum_error(zio_t *zio, zio_bad_cksum_t *out);
147 extern enum zio_checksum spa_dedup_checksum(spa_t *spa);
148 extern void zio_checksum_templates_free(spa_t *spa);
149 extern spa_feature_t zio_checksum_to_feature(enum zio_checksum cksum);
155 #endif /* _SYS_ZIO_CHECKSUM_H */