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b6f618f8ff
With anything but fletcher-4, even a tiny change in the input will cause the checksum value to change completely. So knowing the actual and expected checksums doesn't provide much more information than "they don't match". The harm in sending them is simply that they bloat the event. In particular, on FreeBSD the event must fit into a 1016 byte buffer. Fixes #14717 for mirrored pools. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Rich Ercolani <rincebrain@gmail.com> Signed-off-by: Alan Somers <asomers@gmail.com> Sponsored-by: Axcient Closes #14717 Closes #15052
154 lines
4.9 KiB
C
154 lines
4.9 KiB
C
/*
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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 https://opensource.org/licenses/CDDL-1.0.
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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 (c) 2013 Saso Kiselkov, All rights reserved.
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* Copyright (c) 2021 Tino Reichardt <milky-zfs@mcmilk.de>
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*/
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#ifndef _SYS_ZIO_CHECKSUM_H
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#define _SYS_ZIO_CHECKSUM_H extern __attribute__((visibility("default")))
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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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const 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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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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_SYS_ZIO_CHECKSUM_H zio_checksum_info_t
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zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS];
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/*
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* Checksum routines.
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*/
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/* SHA2 */
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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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/* BLAKE3 */
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extern zio_checksum_t abd_checksum_blake3_native;
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extern zio_checksum_t abd_checksum_blake3_byteswap;
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extern zio_checksum_tmpl_init_t abd_checksum_blake3_tmpl_init;
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extern zio_checksum_tmpl_free_t abd_checksum_blake3_tmpl_free;
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/* Fletcher 4 */
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_SYS_ZIO_CHECKSUM_H 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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