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a2d5643f88
Some header files define structures like this one:
typedef const struct zio_checksum_info {
/* ... */
const char *ci_name;
} zio_abd_checksum_func_t;
So we can use `zio_abd_checksum_func_t` for const declarations now.
It's not needed that we use the `const` qualifier again like this:
`const zio_abd_checksum_func_t *varname;`
This patch solves the double const qualifiers, which were found by
smatch.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Signed-off-by: Tino Reichardt <milky-zfs@mcmilk.de>
Closes #13961
199 lines
5.9 KiB
C
199 lines
5.9 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 2009 Sun Microsystems, Inc. All rights reserved.
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* Copyright (c) 2019, Allan Jude
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* Copyright (c) 2019, Klara Inc.
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* Use is subject to license terms.
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* Copyright (c) 2015, 2016 by Delphix. All rights reserved.
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*/
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#ifndef _SYS_ZIO_COMPRESS_H
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#define _SYS_ZIO_COMPRESS_H
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#include <sys/abd.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum zio_compress {
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ZIO_COMPRESS_INHERIT = 0,
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ZIO_COMPRESS_ON,
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ZIO_COMPRESS_OFF,
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ZIO_COMPRESS_LZJB,
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ZIO_COMPRESS_EMPTY,
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ZIO_COMPRESS_GZIP_1,
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ZIO_COMPRESS_GZIP_2,
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ZIO_COMPRESS_GZIP_3,
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ZIO_COMPRESS_GZIP_4,
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ZIO_COMPRESS_GZIP_5,
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ZIO_COMPRESS_GZIP_6,
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ZIO_COMPRESS_GZIP_7,
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ZIO_COMPRESS_GZIP_8,
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ZIO_COMPRESS_GZIP_9,
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ZIO_COMPRESS_ZLE,
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ZIO_COMPRESS_LZ4,
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ZIO_COMPRESS_ZSTD,
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ZIO_COMPRESS_FUNCTIONS
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};
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/* Compression algorithms that have levels */
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#define ZIO_COMPRESS_HASLEVEL(compress) ((compress == ZIO_COMPRESS_ZSTD || \
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(compress >= ZIO_COMPRESS_GZIP_1 && \
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compress <= ZIO_COMPRESS_GZIP_9)))
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#define ZIO_COMPLEVEL_INHERIT 0
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#define ZIO_COMPLEVEL_DEFAULT 255
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enum zio_zstd_levels {
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ZIO_ZSTD_LEVEL_INHERIT = 0,
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ZIO_ZSTD_LEVEL_1,
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#define ZIO_ZSTD_LEVEL_MIN ZIO_ZSTD_LEVEL_1
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ZIO_ZSTD_LEVEL_2,
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ZIO_ZSTD_LEVEL_3,
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#define ZIO_ZSTD_LEVEL_DEFAULT ZIO_ZSTD_LEVEL_3
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ZIO_ZSTD_LEVEL_4,
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ZIO_ZSTD_LEVEL_5,
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ZIO_ZSTD_LEVEL_6,
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ZIO_ZSTD_LEVEL_7,
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ZIO_ZSTD_LEVEL_8,
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ZIO_ZSTD_LEVEL_9,
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ZIO_ZSTD_LEVEL_10,
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ZIO_ZSTD_LEVEL_11,
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ZIO_ZSTD_LEVEL_12,
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ZIO_ZSTD_LEVEL_13,
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ZIO_ZSTD_LEVEL_14,
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ZIO_ZSTD_LEVEL_15,
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ZIO_ZSTD_LEVEL_16,
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ZIO_ZSTD_LEVEL_17,
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ZIO_ZSTD_LEVEL_18,
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ZIO_ZSTD_LEVEL_19,
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#define ZIO_ZSTD_LEVEL_MAX ZIO_ZSTD_LEVEL_19
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ZIO_ZSTD_LEVEL_RESERVE = 101, /* Leave room for new positive levels */
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ZIO_ZSTD_LEVEL_FAST, /* Fast levels are negative */
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ZIO_ZSTD_LEVEL_FAST_1,
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#define ZIO_ZSTD_LEVEL_FAST_DEFAULT ZIO_ZSTD_LEVEL_FAST_1
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ZIO_ZSTD_LEVEL_FAST_2,
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ZIO_ZSTD_LEVEL_FAST_3,
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ZIO_ZSTD_LEVEL_FAST_4,
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ZIO_ZSTD_LEVEL_FAST_5,
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ZIO_ZSTD_LEVEL_FAST_6,
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ZIO_ZSTD_LEVEL_FAST_7,
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ZIO_ZSTD_LEVEL_FAST_8,
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ZIO_ZSTD_LEVEL_FAST_9,
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ZIO_ZSTD_LEVEL_FAST_10,
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ZIO_ZSTD_LEVEL_FAST_20,
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ZIO_ZSTD_LEVEL_FAST_30,
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ZIO_ZSTD_LEVEL_FAST_40,
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ZIO_ZSTD_LEVEL_FAST_50,
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ZIO_ZSTD_LEVEL_FAST_60,
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ZIO_ZSTD_LEVEL_FAST_70,
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ZIO_ZSTD_LEVEL_FAST_80,
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ZIO_ZSTD_LEVEL_FAST_90,
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ZIO_ZSTD_LEVEL_FAST_100,
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ZIO_ZSTD_LEVEL_FAST_500,
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ZIO_ZSTD_LEVEL_FAST_1000,
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#define ZIO_ZSTD_LEVEL_FAST_MAX ZIO_ZSTD_LEVEL_FAST_1000
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ZIO_ZSTD_LEVEL_AUTO = 251, /* Reserved for future use */
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ZIO_ZSTD_LEVEL_LEVELS
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};
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/* Forward Declaration to avoid visibility problems */
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struct zio_prop;
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/* Common signature for all zio compress functions. */
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typedef size_t zio_compress_func_t(void *src, void *dst,
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size_t s_len, size_t d_len, int);
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/* Common signature for all zio decompress functions. */
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typedef int zio_decompress_func_t(void *src, void *dst,
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size_t s_len, size_t d_len, int);
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/* Common signature for all zio decompress and get level functions. */
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typedef int zio_decompresslevel_func_t(void *src, void *dst,
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size_t s_len, size_t d_len, uint8_t *level);
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/* Common signature for all zio get-compression-level functions. */
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typedef int zio_getlevel_func_t(void *src, size_t s_len, uint8_t *level);
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/*
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* Common signature for all zio decompress functions using an ABD as input.
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* This is helpful if you have both compressed ARC and scatter ABDs enabled,
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* but is not a requirement for all compression algorithms.
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*/
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typedef int zio_decompress_abd_func_t(abd_t *src, void *dst,
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size_t s_len, size_t d_len, int);
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/*
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* Information about each compression function.
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*/
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typedef const struct zio_compress_info {
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const char *ci_name;
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int ci_level;
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zio_compress_func_t *ci_compress;
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zio_decompress_func_t *ci_decompress;
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zio_decompresslevel_func_t *ci_decompress_level;
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} zio_compress_info_t;
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extern zio_compress_info_t zio_compress_table[ZIO_COMPRESS_FUNCTIONS];
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/*
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* lz4 compression init & free
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*/
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extern void lz4_init(void);
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extern void lz4_fini(void);
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/*
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* Compression routines.
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*/
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extern size_t lzjb_compress(void *src, void *dst, size_t s_len, size_t d_len,
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int level);
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extern int lzjb_decompress(void *src, void *dst, size_t s_len, size_t d_len,
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int level);
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extern size_t gzip_compress(void *src, void *dst, size_t s_len, size_t d_len,
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int level);
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extern int gzip_decompress(void *src, void *dst, size_t s_len, size_t d_len,
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int level);
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extern size_t zle_compress(void *src, void *dst, size_t s_len, size_t d_len,
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int level);
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extern int zle_decompress(void *src, void *dst, size_t s_len, size_t d_len,
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int level);
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extern size_t lz4_compress_zfs(void *src, void *dst, size_t s_len, size_t d_len,
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int level);
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extern int lz4_decompress_zfs(void *src, void *dst, size_t s_len, size_t d_len,
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int level);
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/*
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* Compress and decompress data if necessary.
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*/
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extern size_t zio_compress_data(enum zio_compress c, abd_t *src, void *dst,
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size_t s_len, uint8_t level);
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extern int zio_decompress_data(enum zio_compress c, abd_t *src, void *dst,
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size_t s_len, size_t d_len, uint8_t *level);
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extern int zio_decompress_data_buf(enum zio_compress c, void *src, void *dst,
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size_t s_len, size_t d_len, uint8_t *level);
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extern int zio_compress_to_feature(enum zio_compress comp);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_ZIO_COMPRESS_H */
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