mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-15 17:28:15 +00:00
4d3c95f5ea
U-Boot port is based on sources forked from GRUB-0.97 by Sun in 2004,
which can be found here:
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/grub/grub-0.97/stage2/zfs-include/zfs.h
Released by Sun for GRUB under the license:
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
GRUB official releases include ZFS in version:
ftp://alpha.gnu.org/gnu/grub/grub-1.99~rc1.tar.gz
And patched against GRUB Bazaar repository for ashift fixes (4KB HDDs)
more conveniently found at github:
e7b6ef3ac3
Signed-off-by: Jorgen Lundman <lundman@lundman.net>
97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
/*
|
|
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <malloc.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/time.h>
|
|
#include <linux/ctype.h>
|
|
#include <asm/byteorder.h>
|
|
#include "zfs_common.h"
|
|
|
|
#include <zfs/zfs.h>
|
|
#include <zfs/zio.h>
|
|
#include <zfs/dnode.h>
|
|
#include <zfs/uberblock_impl.h>
|
|
#include <zfs/vdev_impl.h>
|
|
#include <zfs/zio_checksum.h>
|
|
#include <zfs/zap_impl.h>
|
|
#include <zfs/zap_leaf.h>
|
|
#include <zfs/zfs_znode.h>
|
|
#include <zfs/dmu.h>
|
|
#include <zfs/dmu_objset.h>
|
|
#include <zfs/dsl_dir.h>
|
|
#include <zfs/dsl_dataset.h>
|
|
|
|
#define MATCH_BITS 6
|
|
#define MATCH_MIN 3
|
|
#define OFFSET_MASK ((1 << (16 - MATCH_BITS)) - 1)
|
|
|
|
/*
|
|
* Decompression Entry - lzjb
|
|
*/
|
|
#ifndef NBBY
|
|
#define NBBY 8
|
|
#endif
|
|
|
|
int
|
|
lzjb_decompress(void *s_start, void *d_start, uint32_t s_len,
|
|
uint32_t d_len)
|
|
{
|
|
uint8_t *src = s_start;
|
|
uint8_t *dst = d_start;
|
|
uint8_t *d_end = (uint8_t *) d_start + d_len;
|
|
uint8_t *s_end = (uint8_t *) s_start + s_len;
|
|
uint8_t *cpy, copymap = 0;
|
|
int copymask = 1 << (NBBY - 1);
|
|
|
|
while (dst < d_end && src < s_end) {
|
|
if ((copymask <<= 1) == (1 << NBBY)) {
|
|
copymask = 1;
|
|
copymap = *src++;
|
|
}
|
|
if (src >= s_end) {
|
|
printf("lzjb decompression failed\n");
|
|
return ZFS_ERR_BAD_FS;
|
|
}
|
|
if (copymap & copymask) {
|
|
int mlen = (src[0] >> (NBBY - MATCH_BITS)) + MATCH_MIN;
|
|
int offset = ((src[0] << NBBY) | src[1]) & OFFSET_MASK;
|
|
src += 2;
|
|
cpy = dst - offset;
|
|
if (src > s_end || cpy < (uint8_t *) d_start) {
|
|
printf("lzjb decompression failed\n");
|
|
return ZFS_ERR_BAD_FS;
|
|
}
|
|
while (--mlen >= 0 && dst < d_end)
|
|
*dst++ = *cpy++;
|
|
} else {
|
|
*dst++ = *src++;
|
|
}
|
|
}
|
|
if (dst < d_end) {
|
|
printf("lzjb decompression failed\n");
|
|
return ZFS_ERR_BAD_FS;
|
|
}
|
|
return ZFS_ERR_NONE;
|
|
}
|