+++ /dev/null
---- /dev/null
-+++ b/include/linux/decompress/unlzo.h
-@@ -0,0 +1,10 @@
-+#ifndef DECOMPRESS_UNLZO_H
-+#define DECOMPRESS_UNLZO_H
-+
-+int unlzo(unsigned char *inbuf, int len,
-+ int(*fill)(void*, unsigned int),
-+ int(*flush)(void*, unsigned int),
-+ unsigned char *output,
-+ int *pos,
-+ void(*error)(char *x));
-+#endif
---- a/init/Kconfig
-+++ b/init/Kconfig
-@@ -115,10 +115,13 @@ config HAVE_KERNEL_BZIP2
- config HAVE_KERNEL_LZMA
- bool
-
-+config HAVE_KERNEL_LZO
-+ bool
-+
- choice
- prompt "Kernel compression mode"
- default KERNEL_GZIP
-- depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA
-+ depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA || HAVE_KERNEL_LZO
- help
- The linux kernel is a kind of self-extracting executable.
- Several compression algorithms are available, which differ
-@@ -141,9 +144,8 @@ config KERNEL_GZIP
- bool "Gzip"
- depends on HAVE_KERNEL_GZIP
- help
-- The old and tried gzip compression. Its compression ratio is
-- the poorest among the 3 choices; however its speed (both
-- compression and decompression) is the fastest.
-+ The old and tried gzip compression. It provides a good balance
-+ between compression ratio and decompression speed.
-
- config KERNEL_BZIP2
- bool "Bzip2"
-@@ -164,6 +166,14 @@ config KERNEL_LZMA
- two. Compression is slowest. The kernel size is about 33%
- smaller with LZMA in comparison to gzip.
-
-+config KERNEL_LZO
-+ bool "LZO"
-+ depends on HAVE_KERNEL_LZO
-+ help
-+ Its compression ratio is the poorest among the 4. The kernel
-+ size is about about 10% bigger than gzip; however its speed
-+ (both compression and decompression) is the fastest.
-+
- endchoice
-
- config SWAP
---- /dev/null
-+++ b/lib/decompress_unlzo.c
-@@ -0,0 +1,208 @@
-+/*
-+ * LZO decompressor for the Linux kernel. Code borrowed from the lzo
-+ * implementation by Markus Franz Xaver Johannes Oberhumer.
-+ *
-+ * Linux kernel adaptation:
-+ * Copyright (C) 2009
-+ * Albin Tonnerre, Free Electrons <albin.tonnerre@free-electrons.com>
-+ *
-+ * Original code:
-+ * Copyright (C) 1996-2005 Markus Franz Xaver Johannes Oberhumer
-+ * All Rights Reserved.
-+ *
-+ * lzop and the LZO library are free software; you can redistribute them
-+ * and/or modify them 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; see the file COPYING.
-+ * If not, write to the Free Software Foundation, Inc.,
-+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-+ *
-+ * Markus F.X.J. Oberhumer
-+ * <markus@oberhumer.com>
-+ * http://www.oberhumer.com/opensource/lzop/
-+ */
-+
-+#ifdef STATIC
-+#include "lzo/lzo1x_decompress.c"
-+#else
-+#include <linux/slab.h>
-+#include <linux/decompress/unlzo.h>
-+#endif
-+
-+#include <linux/types.h>
-+#include <linux/lzo.h>
-+#include <linux/decompress/mm.h>
-+
-+#include <linux/compiler.h>
-+#include <asm/unaligned.h>
-+
-+static const unsigned char lzop_magic[] =
-+ { 0x89, 0x4c, 0x5a, 0x4f, 0x00, 0x0d, 0x0a, 0x1a, 0x0a };
-+
-+#define LZO_BLOCK_SIZE (256*1024l)
-+#define HEADER_HAS_FILTER 0x00000800L
-+
-+STATIC inline int INIT parse_header(u8 *input, u8 *skip)
-+{
-+ int l;
-+ u8 *parse = input;
-+ u8 level = 0;
-+ u16 version;
-+
-+ /* read magic: 9 first bits */
-+ for (l = 0; l < 9; l++) {
-+ if (*parse++ != lzop_magic[l])
-+ return 0;
-+ }
-+ /* get version (2bytes), skip library version (2),
-+ * 'need to be extracted' version (2) and
-+ * method (1) */
-+ version = get_unaligned_be16(parse);
-+ parse += 7;
-+ if (version >= 0x0940)
-+ level = *parse++;
-+ if (get_unaligned_be32(parse) & HEADER_HAS_FILTER)
-+ parse += 8; /* flags + filter info */
-+ else
-+ parse += 4; /* flags */
-+
-+ /* skip mode and mtime_low */
-+ parse += 8;
-+ if (version >= 0x0940)
-+ parse += 4; /* skip mtime_high */
-+
-+ l = *parse++;
-+ /* don't care about the file name, and skip checksum */
-+ parse += l + 4;
-+
-+ *skip = parse - input;
-+ return 1;
-+}
-+
-+STATIC inline int INIT unlzo(u8 *input, int in_len,
-+ int (*fill) (void *, unsigned int),
-+ int (*flush) (void *, unsigned int),
-+ u8 *output, int *posp,
-+ void (*error_fn) (char *x))
-+{
-+ u8 skip = 0, r = 0;
-+ u32 src_len, dst_len;
-+ size_t tmp;
-+ u8 *in_buf, *in_buf_save, *out_buf;
-+ int obytes_processed = 0;
-+
-+ set_error_fn(error_fn);
-+
-+ if (output)
-+ out_buf = output;
-+ else if (!flush) {
-+ error("NULL output pointer and no flush function provided");
-+ goto exit;
-+ } else {
-+ out_buf = malloc(LZO_BLOCK_SIZE);
-+ if (!out_buf) {
-+ error("Could not allocate output buffer");
-+ goto exit;
-+ }
-+ }
-+
-+ if (input && fill) {
-+ error("Both input pointer and fill function provided, don't know what to do");
-+ goto exit_1;
-+ } else if (input)
-+ in_buf = input;
-+ else if (!fill || !posp) {
-+ error("NULL input pointer and missing position pointer or fill function");
-+ goto exit_1;
-+ } else {
-+ in_buf = malloc(lzo1x_worst_compress(LZO_BLOCK_SIZE));
-+ if (!in_buf) {
-+ error("Could not allocate input buffer");
-+ goto exit_1;
-+ }
-+ }
-+ in_buf_save = in_buf;
-+
-+ if (posp)
-+ *posp = 0;
-+
-+ if (fill)
-+ fill(in_buf, lzo1x_worst_compress(LZO_BLOCK_SIZE));
-+
-+ if (!parse_header(input, &skip)) {
-+ error("invalid header");
-+ goto exit_2;
-+ }
-+ in_buf += skip;
-+
-+ if (posp)
-+ *posp = skip;
-+
-+ for (;;) {
-+ /* read uncompressed block size */
-+ dst_len = get_unaligned_be32(in_buf);
-+ in_buf += 4;
-+
-+ /* exit if last block */
-+ if (dst_len == 0) {
-+ if (posp)
-+ *posp += 4;
-+ break;
-+ }
-+
-+ if (dst_len > LZO_BLOCK_SIZE) {
-+ error("dest len longer than block size");
-+ goto exit_2;
-+ }
-+
-+ /* read compressed block size, and skip block checksum info */
-+ src_len = get_unaligned_be32(in_buf);
-+ in_buf += 8;
-+
-+ if (src_len <= 0 || src_len > dst_len) {
-+ error("file corrupted");
-+ goto exit_2;
-+ }
-+
-+ /* decompress */
-+ tmp = dst_len;
-+ r = lzo1x_decompress_safe((u8 *) in_buf, src_len, out_buf, &tmp);
-+
-+ if (r != LZO_E_OK || dst_len != tmp) {
-+ error("Compressed data violation");
-+ goto exit_2;
-+ }
-+
-+ obytes_processed += dst_len;
-+ if (flush)
-+ flush(out_buf, dst_len);
-+ if (output)
-+ out_buf += dst_len;
-+ if (posp)
-+ *posp += src_len + 12;
-+ if (fill) {
-+ in_buf = in_buf_save;
-+ fill(in_buf, lzo1x_worst_compress(LZO_BLOCK_SIZE));
-+ } else
-+ in_buf += src_len;
-+ }
-+
-+exit_2:
-+ if (!input)
-+ free(in_buf);
-+exit_1:
-+ if (!output)
-+ free(out_buf);
-+exit:
-+ return obytes_processed;
-+}
-+
-+#define decompress unlzo
---- a/lib/lzo/lzo1x_decompress.c
-+++ b/lib/lzo/lzo1x_decompress.c
-@@ -11,11 +11,13 @@
- * Richard Purdie <rpurdie@openedhand.com>
- */
-
-+#ifndef STATIC
- #include <linux/module.h>
- #include <linux/kernel.h>
--#include <linux/lzo.h>
--#include <asm/byteorder.h>
-+#endif
-+
- #include <asm/unaligned.h>
-+#include <linux/lzo.h>
- #include "lzodefs.h"
-
- #define HAVE_IP(x, ip_end, ip) ((size_t)(ip_end - ip) < (x))
-@@ -244,9 +246,10 @@ lookbehind_overrun:
- *out_len = op - out;
- return LZO_E_LOOKBEHIND_OVERRUN;
- }
--
-+#ifndef STATIC
- EXPORT_SYMBOL_GPL(lzo1x_decompress_safe);
-
- MODULE_LICENSE("GPL");
- MODULE_DESCRIPTION("LZO1X Decompressor");
-
-+#endif
---- a/scripts/Makefile.lib
-+++ b/scripts/Makefile.lib
-@@ -230,3 +230,8 @@ quiet_cmd_lzma = LZMA $@
- cmd_lzma = (cat $(filter-out FORCE,$^) | \
- lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
- (rm -f $@ ; false)
-+
-+quiet_cmd_lzo = LZO $@
-+cmd_lzo = (cat $(filter-out FORCE,$^) | \
-+ lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
-+ (rm -f $@ ; false)
projects / openwrt / svn-archive / archive.git / blobdiff