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📄 Makefile.in(4.57 KB)
📄 THIRDPARTYLICENSE.cityhash(1.03 KB)
📄 THIRDPARTYLICENSE.cityhash.descrip(39 B)
📄 abd.c(31.72 KB)
📄 aggsum.c(8.46 KB)
📄 arc.c(330.91 KB)
📄 blkptr.c(4.26 KB)
📄 bplist.c(2.38 KB)
📄 bpobj.c(27.82 KB)
📄 bptree.c(8.2 KB)
📄 bqueue.c(4.7 KB)
📄 btree.c(65.19 KB)
📄 dataset_kstats.c(6.32 KB)
📄 dbuf.c(141.84 KB)
📄 dbuf_stats.c(6.05 KB)
📄 ddt.c(28.01 KB)
📄 ddt_zap.c(4.38 KB)
📄 dmu.c(60.44 KB)
📄 dmu_diff.c(6.25 KB)
📄 dmu_object.c(14.73 KB)
📄 dmu_objset.c(79.38 KB)
📄 dmu_recv.c(98.69 KB)
📄 dmu_redact.c(37.09 KB)
📄 dmu_send.c(95.51 KB)
📄 dmu_traverse.c(21.98 KB)
📄 dmu_tx.c(40.13 KB)
📄 dmu_zfetch.c(13.56 KB)
📄 dnode.c(71.32 KB)
📄 dnode_sync.c(24.93 KB)
📄 dsl_bookmark.c(51.22 KB)
📄 dsl_crypt.c(78.06 KB)
📄 dsl_dataset.c(141.61 KB)
📄 dsl_deadlist.c(27.94 KB)
📄 dsl_deleg.c(19.92 KB)
📄 dsl_destroy.c(36.73 KB)
📄 dsl_dir.c(65.45 KB)
📄 dsl_pool.c(42.92 KB)
📄 dsl_prop.c(32.88 KB)
📄 dsl_scan.c(134.47 KB)
📄 dsl_synctask.c(7.94 KB)
📄 dsl_userhold.c(18.26 KB)
📄 edonr_zfs.c(3.21 KB)
📄 fm.c(39.75 KB)
📄 gzip.c(2.57 KB)
📄 hkdf.c(4.5 KB)
📄 lz4.c(26.46 KB)
📄 lzjb.c(3.85 KB)
📄 metaslab.c(190.62 KB)
📄 mmp.c(24.93 KB)
📄 multilist.c(12.21 KB)
📄 objlist.c(2.58 KB)
📄 pathname.c(2.52 KB)
📄 range_tree.c(24.9 KB)
📄 refcount.c(7.82 KB)
📄 rrwlock.c(10.82 KB)
📄 sa.c(59.23 KB)
📄 sha256.c(2.89 KB)
📄 skein_zfs.c(2.92 KB)
📄 spa.c(272.81 KB)
📄 spa_boot.c(1.28 KB)
📄 spa_checkpoint.c(21.54 KB)
📄 spa_config.c(16.97 KB)
📄 spa_errlog.c(11.35 KB)
📄 spa_history.c(17.75 KB)
📄 spa_log_spacemap.c(47.13 KB)
📄 spa_misc.c(75.4 KB)
📄 spa_stats.c(27.08 KB)
📄 space_map.c(31.45 KB)
📄 space_reftree.c(4.21 KB)
📄 txg.c(27.49 KB)
📄 uberblock.c(2.17 KB)
📄 unique.c(2.53 KB)
📄 vdev.c(143.91 KB)
📄 vdev_cache.c(11.71 KB)
📄 vdev_draid.c(96.86 KB)
📄 vdev_draid_rand.c(1.16 KB)
📄 vdev_indirect.c(60.83 KB)
📄 vdev_indirect_births.c(5.88 KB)
📄 vdev_indirect_mapping.c(18.06 KB)
📄 vdev_initialize.c(22.38 KB)
📄 vdev_label.c(57.52 KB)
📄 vdev_mirror.c(26.76 KB)
📄 vdev_missing.c(3.74 KB)
📄 vdev_queue.c(37.61 KB)
📄 vdev_raidz.c(76.09 KB)
📄 vdev_raidz_math.c(17.18 KB)
📄 vdev_raidz_math_aarch64_neon.c(112.13 KB)
📄 vdev_raidz_math_aarch64_neon_common.h(23.64 KB)
📄 vdev_raidz_math_aarch64_neonx2.c(5.39 KB)
📄 vdev_raidz_math_avx2.c(10.64 KB)
📄 vdev_raidz_math_avx512bw.c(10.93 KB)
📄 vdev_raidz_math_avx512f.c(17.9 KB)
📄 vdev_raidz_math_impl.h(34.78 KB)
📄 vdev_raidz_math_powerpc_altivec.c(213.46 KB)
📄 vdev_raidz_math_powerpc_altivec_common.h(22.62 KB)
📄 vdev_raidz_math_scalar.c(9.54 KB)
📄 vdev_raidz_math_sse2.c(25.84 KB)
📄 vdev_raidz_math_ssse3.c(118 KB)
📄 vdev_rebuild.c(34.65 KB)
📄 vdev_removal.c(72.08 KB)
📄 vdev_root.c(4.28 KB)
📄 vdev_trim.c(50.92 KB)
📄 zap.c(35.35 KB)
📄 zap_leaf.c(22.75 KB)
📄 zap_micro.c(42.18 KB)
📄 zcp.c(42.29 KB)
📄 zcp_get.c(21.01 KB)
📄 zcp_global.c(1.9 KB)
📄 zcp_iter.c(18.21 KB)
📄 zcp_set.c(2.37 KB)
📄 zcp_synctask.c(13.69 KB)
📄 zfeature.c(17.6 KB)
📄 zfs_byteswap.c(5.64 KB)
📄 zfs_fm.c(40.58 KB)
📄 zfs_fuid.c(19.69 KB)
📄 zfs_ioctl.c(195.48 KB)
📄 zfs_log.c(20.6 KB)
📄 zfs_onexit.c(5.09 KB)
📄 zfs_quota.c(12.93 KB)
📄 zfs_ratelimit.c(2.35 KB)
📄 zfs_replay.c(26.11 KB)
📄 zfs_rlock.c(20.38 KB)
📄 zfs_sa.c(13.09 KB)
📄 zfs_vnops.c(22 KB)
📄 zil.c(111.32 KB)
📄 zio.c(144.72 KB)
📄 zio_checksum.c(17.28 KB)
📄 zio_compress.c(5.92 KB)
📄 zio_inject.c(25.79 KB)
📄 zle.c(2.52 KB)
📄 zrlock.c(4.45 KB)
📄 zthr.c(16.41 KB)
📄 zvol.c(42.96 KB)

Editing: lzjb.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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 */

/*
 * We keep our own copy of this algorithm for 3 main reasons:
 *	1. If we didn't, anyone modifying common/os/compress.c would
 *         directly break our on disk format
 *	2. Our version of lzjb does not have a number of checks that the
 *         common/os version needs and uses
 *	3. We initialize the lempel to ensure deterministic results,
 *	   so that identical blocks can always be deduplicated.
 * In particular, we are adding the "feature" that compress() can
 * take a destination buffer size and returns the compressed length, or the
 * source length if compression would overflow the destination buffer.
 */

#include <sys/zfs_context.h>
#include <sys/zio_compress.h>

#define	MATCH_BITS	6
#define	MATCH_MIN	3
#define	MATCH_MAX	((1 << MATCH_BITS) + (MATCH_MIN - 1))
#define	OFFSET_MASK	((1 << (16 - MATCH_BITS)) - 1)
#define	LEMPEL_SIZE	1024

/*ARGSUSED*/
size_t
lzjb_compress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
{
	uchar_t *src = s_start;
	uchar_t *dst = d_start;
	uchar_t *cpy;
	uchar_t *copymap = NULL;
	int copymask = 1 << (NBBY - 1);
	int mlen, offset, hash;
	uint16_t *hp;
	uint16_t *lempel;

lempel = kmem_zalloc(LEMPEL_SIZE * sizeof (uint16_t), KM_SLEEP);
	while (src < (uchar_t *)s_start + s_len) {
		if ((copymask <<= 1) == (1 << NBBY)) {
			if (dst >= (uchar_t *)d_start + d_len - 1 - 2 * NBBY) {
				kmem_free(lempel,
				    LEMPEL_SIZE*sizeof (uint16_t));
				return (s_len);
			}
			copymask = 1;
			copymap = dst;
			*dst++ = 0;
		}
		if (src > (uchar_t *)s_start + s_len - MATCH_MAX) {
			*dst++ = *src++;
			continue;
		}
		hash = (src[0] << 16) + (src[1] << 8) + src[2];
		hash += hash >> 9;
		hash += hash >> 5;
		hp = &lempel[hash & (LEMPEL_SIZE - 1)];
		offset = (intptr_t)(src - *hp) & OFFSET_MASK;
		*hp = (uint16_t)(uintptr_t)src;
		cpy = src - offset;
		if (cpy >= (uchar_t *)s_start && cpy != src &&
		    src[0] == cpy[0] && src[1] == cpy[1] && src[2] == cpy[2]) {
			*copymap |= copymask;
			for (mlen = MATCH_MIN; mlen < MATCH_MAX; mlen++)
				if (src[mlen] != cpy[mlen])
					break;
			*dst++ = ((mlen - MATCH_MIN) << (NBBY - MATCH_BITS)) |
			    (offset >> NBBY);
			*dst++ = (uchar_t)offset;
			src += mlen;
		} else {
			*dst++ = *src++;
		}
	}

kmem_free(lempel, LEMPEL_SIZE * sizeof (uint16_t));
	return (dst - (uchar_t *)d_start);
}

/*ARGSUSED*/
int
lzjb_decompress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
{
	uchar_t *src = s_start;
	uchar_t *dst = d_start;
	uchar_t *d_end = (uchar_t *)d_start + d_len;
	uchar_t *cpy;
	uchar_t copymap = 0;
	int copymask = 1 << (NBBY - 1);

while (dst < d_end) {
		if ((copymask <<= 1) == (1 << NBBY)) {
			copymask = 1;
			copymap = *src++;
		}
		if (copymap & copymask) {
			int mlen = (src[0] >> (NBBY - MATCH_BITS)) + MATCH_MIN;
			int offset = ((src[0] << NBBY) | src[1]) & OFFSET_MASK;
			src += 2;
			if ((cpy = dst - offset) < (uchar_t *)d_start)
				return (-1);
			while (--mlen >= 0 && dst < d_end)
				*dst++ = *cpy++;
		} else {
			*dst++ = *src++;
		}
	}
	return (0);
}

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Editing: lzjb.c

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