mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-11-17 18:11:00 +03:00
99197f034e
5661 ZFS: "compression = on" should use lz4 if feature is enabled Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net> Reviewed by: Xin LI <delphij@freebsd.org> Approved by: Robert Mustacchi <rm@joyent.com> References: https://github.com/illumos/illumos-gate/commit/db1741f https://www.illumos.org/issues/5661 Ported-by: kernelOfTruth kerneloftruth@gmail.com Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #3571
135 lines
3.7 KiB
C
135 lines
3.7 KiB
C
/*
|
|
* 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 2009 Sun Microsystems, Inc. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*/
|
|
/*
|
|
* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2013 by Delphix. All rights reserved.
|
|
*/
|
|
|
|
#include <sys/zfs_context.h>
|
|
#include <sys/compress.h>
|
|
#include <sys/spa.h>
|
|
#include <sys/zfeature.h>
|
|
#include <sys/zio.h>
|
|
#include <sys/zio_compress.h>
|
|
|
|
/*
|
|
* Compression vectors.
|
|
*/
|
|
|
|
zio_compress_info_t zio_compress_table[ZIO_COMPRESS_FUNCTIONS] = {
|
|
{NULL, NULL, 0, "inherit"},
|
|
{NULL, NULL, 0, "on"},
|
|
{NULL, NULL, 0, "uncompressed"},
|
|
{lzjb_compress, lzjb_decompress, 0, "lzjb"},
|
|
{NULL, NULL, 0, "empty"},
|
|
{gzip_compress, gzip_decompress, 1, "gzip-1"},
|
|
{gzip_compress, gzip_decompress, 2, "gzip-2"},
|
|
{gzip_compress, gzip_decompress, 3, "gzip-3"},
|
|
{gzip_compress, gzip_decompress, 4, "gzip-4"},
|
|
{gzip_compress, gzip_decompress, 5, "gzip-5"},
|
|
{gzip_compress, gzip_decompress, 6, "gzip-6"},
|
|
{gzip_compress, gzip_decompress, 7, "gzip-7"},
|
|
{gzip_compress, gzip_decompress, 8, "gzip-8"},
|
|
{gzip_compress, gzip_decompress, 9, "gzip-9"},
|
|
{zle_compress, zle_decompress, 64, "zle"},
|
|
{lz4_compress_zfs, lz4_decompress_zfs, 0, "lz4"},
|
|
};
|
|
|
|
enum zio_compress
|
|
zio_compress_select(spa_t *spa, enum zio_compress child,
|
|
enum zio_compress parent)
|
|
{
|
|
enum zio_compress result;
|
|
|
|
ASSERT(child < ZIO_COMPRESS_FUNCTIONS);
|
|
ASSERT(parent < ZIO_COMPRESS_FUNCTIONS);
|
|
ASSERT(parent != ZIO_COMPRESS_INHERIT);
|
|
|
|
result = child;
|
|
if (result == ZIO_COMPRESS_INHERIT)
|
|
result = parent;
|
|
|
|
if (result == ZIO_COMPRESS_ON) {
|
|
if (spa_feature_is_active(spa, SPA_FEATURE_LZ4_COMPRESS))
|
|
result = ZIO_COMPRESS_LZ4_ON_VALUE;
|
|
else
|
|
result = ZIO_COMPRESS_LEGACY_ON_VALUE;
|
|
}
|
|
|
|
return (result);
|
|
}
|
|
|
|
size_t
|
|
zio_compress_data(enum zio_compress c, void *src, void *dst, size_t s_len)
|
|
{
|
|
uint64_t *word, *word_end;
|
|
size_t c_len, d_len;
|
|
zio_compress_info_t *ci = &zio_compress_table[c];
|
|
|
|
ASSERT((uint_t)c < ZIO_COMPRESS_FUNCTIONS);
|
|
ASSERT((uint_t)c == ZIO_COMPRESS_EMPTY || ci->ci_compress != NULL);
|
|
|
|
/*
|
|
* If the data is all zeroes, we don't even need to allocate
|
|
* a block for it. We indicate this by returning zero size.
|
|
*/
|
|
word_end = (uint64_t *)((char *)src + s_len);
|
|
for (word = src; word < word_end; word++)
|
|
if (*word != 0)
|
|
break;
|
|
|
|
if (word == word_end)
|
|
return (0);
|
|
|
|
if (c == ZIO_COMPRESS_EMPTY)
|
|
return (s_len);
|
|
|
|
/* Compress at least 12.5% */
|
|
d_len = s_len - (s_len >> 3);
|
|
c_len = ci->ci_compress(src, dst, s_len, d_len, ci->ci_level);
|
|
|
|
if (c_len > d_len)
|
|
return (s_len);
|
|
|
|
ASSERT3U(c_len, <=, d_len);
|
|
return (c_len);
|
|
}
|
|
|
|
int
|
|
zio_decompress_data(enum zio_compress c, void *src, void *dst,
|
|
size_t s_len, size_t d_len)
|
|
{
|
|
zio_compress_info_t *ci = &zio_compress_table[c];
|
|
|
|
if ((uint_t)c >= ZIO_COMPRESS_FUNCTIONS || ci->ci_decompress == NULL)
|
|
return (SET_ERROR(EINVAL));
|
|
|
|
return (ci->ci_decompress(src, dst, s_len, d_len, ci->ci_level));
|
|
}
|