145 lines
4.5 KiB
C
145 lines
4.5 KiB
C
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2014, 2016 by Delphix. All rights reserved.
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* Copyright Saso Kiselkov 2013, All rights reserved.
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*/
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#ifndef _SYS_ZIO_CHECKSUM_H
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#define _SYS_ZIO_CHECKSUM_H
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#include <sys/zio.h>
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#include <zfeature_common.h>
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#include <zfs_fletcher.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct abd;
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/*
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* Signature for checksum functions.
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*/
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typedef void zio_checksum_t(struct abd *abd, uint64_t size,
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const void *ctx_template, zio_cksum_t *zcp);
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typedef void *zio_checksum_tmpl_init_t(const zio_cksum_salt_t *salt);
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typedef void zio_checksum_tmpl_free_t(void *ctx_template);
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typedef enum zio_checksum_flags {
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/* Strong enough for metadata? */
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ZCHECKSUM_FLAG_METADATA = (1 << 1),
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/* ZIO embedded checksum */
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ZCHECKSUM_FLAG_EMBEDDED = (1 << 2),
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/* Strong enough for dedup (without verification)? */
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ZCHECKSUM_FLAG_DEDUP = (1 << 3),
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/* Uses salt value */
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ZCHECKSUM_FLAG_SALTED = (1 << 4),
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/* Strong enough for nopwrite? */
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ZCHECKSUM_FLAG_NOPWRITE = (1 << 5)
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} zio_checksum_flags_t;
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typedef enum {
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ZIO_CHECKSUM_NATIVE,
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ZIO_CHECKSUM_BYTESWAP
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} zio_byteorder_t;
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typedef struct zio_abd_checksum_data {
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zio_byteorder_t acd_byteorder;
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fletcher_4_ctx_t *acd_ctx;
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zio_cksum_t *acd_zcp;
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void *acd_private;
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} zio_abd_checksum_data_t;
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typedef void zio_abd_checksum_init_t(zio_abd_checksum_data_t *);
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typedef void zio_abd_checksum_fini_t(zio_abd_checksum_data_t *);
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typedef int zio_abd_checksum_iter_t(void *, size_t, void *);
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typedef const struct zio_abd_checksum_func {
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zio_abd_checksum_init_t *acf_init;
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zio_abd_checksum_fini_t *acf_fini;
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zio_abd_checksum_iter_t *acf_iter;
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} zio_abd_checksum_func_t;
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/*
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* Information about each checksum function.
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*/
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typedef const struct zio_checksum_info {
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/* checksum function for each byteorder */
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zio_checksum_t *ci_func[2];
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zio_checksum_tmpl_init_t *ci_tmpl_init;
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zio_checksum_tmpl_free_t *ci_tmpl_free;
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zio_checksum_flags_t ci_flags;
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char *ci_name; /* descriptive name */
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} zio_checksum_info_t;
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typedef struct zio_bad_cksum {
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zio_cksum_t zbc_expected;
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zio_cksum_t zbc_actual;
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const char *zbc_checksum_name;
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uint8_t zbc_byteswapped;
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uint8_t zbc_injected;
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uint8_t zbc_has_cksum; /* expected/actual valid */
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} zio_bad_cksum_t;
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extern zio_checksum_info_t zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS];
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/*
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* Checksum routines.
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*/
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extern zio_checksum_t abd_checksum_SHA256;
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extern zio_checksum_t abd_checksum_SHA512_native;
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extern zio_checksum_t abd_checksum_SHA512_byteswap;
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/* Skein */
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extern zio_checksum_t abd_checksum_skein_native;
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extern zio_checksum_t abd_checksum_skein_byteswap;
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extern zio_checksum_tmpl_init_t abd_checksum_skein_tmpl_init;
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extern zio_checksum_tmpl_free_t abd_checksum_skein_tmpl_free;
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/* Edon-R */
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extern zio_checksum_t abd_checksum_edonr_native;
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extern zio_checksum_t abd_checksum_edonr_byteswap;
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extern zio_checksum_tmpl_init_t abd_checksum_edonr_tmpl_init;
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extern zio_checksum_tmpl_free_t abd_checksum_edonr_tmpl_free;
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extern zio_abd_checksum_func_t fletcher_4_abd_ops;
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extern zio_checksum_t abd_fletcher_4_native;
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extern zio_checksum_t abd_fletcher_4_byteswap;
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extern int zio_checksum_equal(spa_t *, blkptr_t *, enum zio_checksum,
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void *, uint64_t, uint64_t, zio_bad_cksum_t *);
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extern void zio_checksum_compute(zio_t *, enum zio_checksum,
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struct abd *, uint64_t);
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extern int zio_checksum_error_impl(spa_t *, const blkptr_t *, enum zio_checksum,
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struct abd *, uint64_t, uint64_t, zio_bad_cksum_t *);
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extern int zio_checksum_error(zio_t *zio, zio_bad_cksum_t *out);
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extern enum zio_checksum spa_dedup_checksum(spa_t *spa);
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extern void zio_checksum_templates_free(spa_t *spa);
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extern spa_feature_t zio_checksum_to_feature(enum zio_checksum cksum);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_ZIO_CHECKSUM_H */
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