diff options
Diffstat (limited to 'packages/mtd/mtd-utils/add_lzo.patch')
| -rw-r--r-- | packages/mtd/mtd-utils/add_lzo.patch | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/packages/mtd/mtd-utils/add_lzo.patch b/packages/mtd/mtd-utils/add_lzo.patch new file mode 100644 index 0000000000..9afd1ca46b --- /dev/null +++ b/packages/mtd/mtd-utils/add_lzo.patch @@ -0,0 +1,220 @@ +Add LZO support to mtd-utils to generate LZO compressed jffs2 images + +Unlike the kernel version, the standard lzo userspace library is used +along with lzo1x_999_compress rather than the lzo1x_1_compress version +since better compression ratios can be obtained (at no significant cost +to decompression time). + +Signed-off-by: Richard Purdie <rpurdie@openedhand.com> + +--- + Makefile | 3 - + compr.c | 6 ++ + compr.h | 6 ++ + compr_lzo.c | 120 ++++++++++++++++++++++++++++++++++++++++++++++++++ + include/linux/jffs2.h | 1 + 5 files changed, 135 insertions(+), 1 deletion(-) + +Index: git/Makefile +=================================================================== +--- git.orig/Makefile 2007-03-01 11:57:58.000000000 +0000 ++++ git/Makefile 2007-03-01 11:58:01.000000000 +0000 +@@ -58,8 +58,9 @@ $(BUILDDIR)/mkfs.jffs2: $(BUILDDIR)/crc3 + $(BUILDDIR)/compr_rtime.o \ + $(BUILDDIR)/mkfs.jffs2.o \ + $(BUILDDIR)/compr_zlib.o \ ++ $(BUILDDIR)/compr_lzo.o \ + $(BUILDDIR)/compr.o +- $(CC) $(LDFLAGS) -o $@ $^ -lz ++ $(CC) $(LDFLAGS) -o $@ $^ -lz -llzo + + $(BUILDDIR)/flash_eraseall: $(BUILDDIR)/crc32.o $(BUILDDIR)/flash_eraseall.o + $(CC) $(LDFLAGS) -o $@ $^ +Index: git/compr.c +=================================================================== +--- git.orig/compr.c 2007-03-01 11:57:58.000000000 +0000 ++++ git/compr.c 2007-03-01 11:58:01.000000000 +0000 +@@ -474,6 +474,9 @@ int jffs2_compressors_init(void) + #ifdef CONFIG_JFFS2_RTIME + jffs2_rtime_init(); + #endif ++#ifdef CONFIG_JFFS2_LZO ++ jffs2_lzo_init(); ++#endif + return 0; + } + +@@ -485,5 +488,8 @@ int jffs2_compressors_exit(void) + #ifdef CONFIG_JFFS2_ZLIB + jffs2_zlib_exit(); + #endif ++#ifdef CONFIG_JFFS2_LZO ++ jffs2_lzo_exit(); ++#endif + return 0; + } +Index: git/compr.h +=================================================================== +--- git.orig/compr.h 2007-03-01 11:57:58.000000000 +0000 ++++ git/compr.h 2007-03-01 11:58:01.000000000 +0000 +@@ -21,11 +21,13 @@ + + #define CONFIG_JFFS2_ZLIB + #define CONFIG_JFFS2_RTIME ++#define CONFIG_JFFS2_LZO + + #define JFFS2_RUBINMIPS_PRIORITY 10 + #define JFFS2_DYNRUBIN_PRIORITY 20 + #define JFFS2_RTIME_PRIORITY 50 + #define JFFS2_ZLIB_PRIORITY 60 ++#define JFFS2_LZO_PRIORITY 80 + + #define JFFS2_COMPR_MODE_NONE 0 + #define JFFS2_COMPR_MODE_PRIORITY 1 +@@ -111,5 +113,9 @@ void jffs2_zlib_exit(void); + int jffs2_rtime_init(void); + void jffs2_rtime_exit(void); + #endif ++#ifdef CONFIG_JFFS2_LZO ++int jffs2_lzo_init(void); ++void jffs2_lzo_exit(void); ++#endif + + #endif /* __JFFS2_COMPR_H__ */ +Index: git/compr_lzo.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ git/compr_lzo.c 2007-03-01 11:58:01.000000000 +0000 +@@ -0,0 +1,120 @@ ++/* ++ * JFFS2 LZO Compression Interface. ++ * ++ * Copyright (C) 2007 Nokia Corporation. All rights reserved. ++ * ++ * Author: Richard Purdie <rpurdie@openedhand.com> ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License ++ * version 2 as published by the Free Software Foundation. ++ * ++ * 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., 51 Franklin St, Fifth Floor, Boston, MA ++ * 02110-1301 USA ++ * ++ */ ++ ++#include <stdint.h> ++#include <stdio.h> ++#include <string.h> ++#include <asm/types.h> ++#include <linux/jffs2.h> ++#include <lzo1x.h> ++#include "compr.h" ++ ++extern int page_size; ++ ++static void *lzo_mem; ++static void *lzo_compress_buf; ++ ++/* ++ * Note about LZO compression. ++ * ++ * We want to use the _999_ compression routine which gives better compression ++ * rates at the expense of time. Decompression time is unaffected. We might as ++ * well use the standard lzo library routines for this but they will overflow ++ * the destination buffer since they don't check the destination size. ++ * ++ * We therefore compress to a temporary buffer and copy if it will fit. ++ * ++ */ ++static int jffs2_lzo_cmpr(unsigned char *data_in, unsigned char *cpage_out, ++ uint32_t *sourcelen, uint32_t *dstlen, void *model) ++{ ++ uint32_t compress_size; ++ int ret; ++ ++ ret = lzo1x_999_compress(data_in, *sourcelen, lzo_compress_buf, &compress_size, lzo_mem); ++ ++ if (ret != LZO_E_OK) ++ return -1; ++ ++ if (compress_size > *dstlen) ++ return -1; ++ ++ memcpy(cpage_out, lzo_compress_buf, compress_size); ++ *dstlen = compress_size; ++ ++ return 0; ++} ++ ++static int jffs2_lzo_decompress(unsigned char *data_in, unsigned char *cpage_out, ++ uint32_t srclen, uint32_t destlen, void *model) ++{ ++ int ret; ++ uint32_t dl; ++ ++ ret = lzo1x_decompress_safe(data_in,srclen,cpage_out,&dl,NULL); ++ ++ if (ret != LZO_E_OK || dl != destlen) ++ return -1; ++ ++ return 0; ++} ++ ++static struct jffs2_compressor jffs2_lzo_comp = { ++ .priority = JFFS2_LZO_PRIORITY, ++ .name = "lzo", ++ .compr = JFFS2_COMPR_LZO, ++ .compress = &jffs2_lzo_cmpr, ++ .decompress = &jffs2_lzo_decompress, ++ .disabled = 0, ++}; ++ ++int jffs2_lzo_init(void) ++{ ++ int ret; ++ ++ lzo_mem = malloc(LZO1X_999_MEM_COMPRESS); ++ if (!lzo_mem) ++ return -1; ++ ++ /* Worse case LZO compression size from their FAQ */ ++ lzo_compress_buf = malloc(page_size + (page_size / 64) + 16 + 3); ++ if (!lzo_compress_buf) { ++ free(lzo_mem); ++ return -1; ++ } ++ ++ ret = jffs2_register_compressor(&jffs2_lzo_comp); ++ if (ret < 0) { ++ free(lzo_compress_buf); ++ free(lzo_mem); ++ } ++ ++ return ret; ++} ++ ++void jffs2_lzo_exit(void) ++{ ++ jffs2_unregister_compressor(&jffs2_lzo_comp); ++ free(lzo_compress_buf); ++ free(lzo_mem); ++} +Index: git/include/linux/jffs2.h +=================================================================== +--- git.orig/include/linux/jffs2.h 2007-03-01 11:57:58.000000000 +0000 ++++ git/include/linux/jffs2.h 2007-03-01 11:58:01.000000000 +0000 +@@ -46,6 +46,7 @@ + #define JFFS2_COMPR_COPY 0x04 + #define JFFS2_COMPR_DYNRUBIN 0x05 + #define JFFS2_COMPR_ZLIB 0x06 ++#define JFFS2_COMPR_LZO 0x07 + /* Compatibility flags. */ + #define JFFS2_COMPAT_MASK 0xc000 /* What do to if an unknown nodetype is found */ + #define JFFS2_NODE_ACCURATE 0x2000 |