diff options
Diffstat (limited to 'include/sys/zio_checksum.h')
| -rw-r--r-- | include/sys/zio_checksum.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/include/sys/zio_checksum.h b/include/sys/zio_checksum.h new file mode 100644 index 000000000000..45abd3bd313b --- /dev/null +++ b/include/sys/zio_checksum.h @@ -0,0 +1,144 @@ +/* + * 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 http://www.opensolaris.org/os/licensing. + * 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) 2005, 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2014, 2016 by Delphix. All rights reserved. + * Copyright Saso Kiselkov 2013, All rights reserved. + */ + +#ifndef _SYS_ZIO_CHECKSUM_H +#define _SYS_ZIO_CHECKSUM_H + +#include <sys/zio.h> +#include <zfeature_common.h> +#include <zfs_fletcher.h> + +#ifdef __cplusplus +extern "C" { +#endif + +struct abd; + +/* + * Signature for checksum functions. + */ +typedef void zio_checksum_t(struct abd *abd, uint64_t size, + const void *ctx_template, zio_cksum_t *zcp); +typedef void *zio_checksum_tmpl_init_t(const zio_cksum_salt_t *salt); +typedef void zio_checksum_tmpl_free_t(void *ctx_template); + +typedef enum zio_checksum_flags { + /* Strong enough for metadata? */ + ZCHECKSUM_FLAG_METADATA = (1 << 1), + /* ZIO embedded checksum */ + ZCHECKSUM_FLAG_EMBEDDED = (1 << 2), + /* Strong enough for dedup (without verification)? */ + ZCHECKSUM_FLAG_DEDUP = (1 << 3), + /* Uses salt value */ + ZCHECKSUM_FLAG_SALTED = (1 << 4), + /* Strong enough for nopwrite? */ + ZCHECKSUM_FLAG_NOPWRITE = (1 << 5) +} zio_checksum_flags_t; + +typedef enum { + ZIO_CHECKSUM_NATIVE, + ZIO_CHECKSUM_BYTESWAP +} zio_byteorder_t; + +typedef struct zio_abd_checksum_data { + zio_byteorder_t acd_byteorder; + fletcher_4_ctx_t *acd_ctx; + zio_cksum_t *acd_zcp; + void *acd_private; +} zio_abd_checksum_data_t; + +typedef void zio_abd_checksum_init_t(zio_abd_checksum_data_t *); +typedef void zio_abd_checksum_fini_t(zio_abd_checksum_data_t *); +typedef int zio_abd_checksum_iter_t(void *, size_t, void *); + +typedef const struct zio_abd_checksum_func { + zio_abd_checksum_init_t *acf_init; + zio_abd_checksum_fini_t *acf_fini; + zio_abd_checksum_iter_t *acf_iter; +} zio_abd_checksum_func_t; + +/* + * Information about each checksum function. + */ +typedef const struct zio_checksum_info { + /* checksum function for each byteorder */ + zio_checksum_t *ci_func[2]; + zio_checksum_tmpl_init_t *ci_tmpl_init; + zio_checksum_tmpl_free_t *ci_tmpl_free; + zio_checksum_flags_t ci_flags; + char *ci_name; /* descriptive name */ +} zio_checksum_info_t; + +typedef struct zio_bad_cksum { + zio_cksum_t zbc_expected; + zio_cksum_t zbc_actual; + const char *zbc_checksum_name; + uint8_t zbc_byteswapped; + uint8_t zbc_injected; + uint8_t zbc_has_cksum; /* expected/actual valid */ +} zio_bad_cksum_t; + +extern zio_checksum_info_t zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS]; + +/* + * Checksum routines. + */ +extern zio_checksum_t abd_checksum_SHA256; +extern zio_checksum_t abd_checksum_SHA512_native; +extern zio_checksum_t abd_checksum_SHA512_byteswap; + +/* Skein */ +extern zio_checksum_t abd_checksum_skein_native; +extern zio_checksum_t abd_checksum_skein_byteswap; +extern zio_checksum_tmpl_init_t abd_checksum_skein_tmpl_init; +extern zio_checksum_tmpl_free_t abd_checksum_skein_tmpl_free; + +/* Edon-R */ +extern zio_checksum_t abd_checksum_edonr_native; +extern zio_checksum_t abd_checksum_edonr_byteswap; +extern zio_checksum_tmpl_init_t abd_checksum_edonr_tmpl_init; +extern zio_checksum_tmpl_free_t abd_checksum_edonr_tmpl_free; + +extern zio_abd_checksum_func_t fletcher_4_abd_ops; +extern zio_checksum_t abd_fletcher_4_native; +extern zio_checksum_t abd_fletcher_4_byteswap; + +extern int zio_checksum_equal(spa_t *, blkptr_t *, enum zio_checksum, + void *, uint64_t, uint64_t, zio_bad_cksum_t *); +extern void zio_checksum_compute(zio_t *, enum zio_checksum, + struct abd *, uint64_t); +extern int zio_checksum_error_impl(spa_t *, const blkptr_t *, enum zio_checksum, + struct abd *, uint64_t, uint64_t, zio_bad_cksum_t *); +extern int zio_checksum_error(zio_t *zio, zio_bad_cksum_t *out); +extern enum zio_checksum spa_dedup_checksum(spa_t *spa); +extern void zio_checksum_templates_free(spa_t *spa); +extern spa_feature_t zio_checksum_to_feature(enum zio_checksum cksum); + +#ifdef __cplusplus +} +#endif + +#endif /* _SYS_ZIO_CHECKSUM_H */ |