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openwrtv4/tools/squashfs4/patches/160-expose_lzma_xz_options.patch
Hauke Mehrtens f97ad870e1 squashfs4: use upstream xz compression header format 
In the upstream kernel and the upstream squashfs4 tools the xz
compression header looks the following:
struct disk_comp_opts {
        __le32 dictionary_size;
        __le32 flags;
};

We added some other members and also moved some existing members. Place
the members which are already in upstream header at the same position
as in that kernel and add our own at the end. The kernel should not
have a problem when there are some additional members and just ignore
them.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2016-06-22 19:32:06 +02:00

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--- /dev/null
+++ b/squashfs-tools/lzma_xz_options.h
@@ -0,0 +1,115 @@
+#ifndef LZMA_XZ_OPTIONS_H
+#define LZMA_XZ_OPTIONS_H
+/*
+ * Copyright (c) 2011
+ * Jonas Gorski <jonas.gorski@gmail.com>
+ *
+ * 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,
+ * 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * lzma_options.h
+ */
+
+#include <stdint.h>
+
+#ifndef linux
+#ifdef __FreeBSD__
+#include <machine/endian.h>
+#endif
+#define __BYTE_ORDER BYTE_ORDER
+#define __BIG_ENDIAN BIG_ENDIAN
+#define __LITTLE_ENDIAN LITTLE_ENDIAN
+#else
+#include <endian.h>
+#endif
+
+
+
+struct lzma_opts {
+ uint32_t dict_size;
+ uint32_t flags;
+#define LZMA_OPT_FLT_MASK 0xffff
+#define LZMA_OPT_PRE_OFF 16
+#define LZMA_OPT_PRE_MASK (0xf << LZMA_OPT_PRE_OFF)
+#define LZMA_OPT_EXTREME 20
+ uint16_t bit_opts;
+#define LZMA_OPT_LC_OFF 0
+#define LZMA_OPT_LC_MASK (0x7 << LZMA_OPT_LC_OFF)
+#define LZMA_OPT_LP_OFF 3
+#define LZMA_OPT_LP_MASK (0x7 << LZMA_OPT_LP_OFF)
+#define LZMA_OPT_PB_OFF 6
+#define LZMA_OPT_PB_MASK (0x7 << LZMA_OPT_PB_OFF)
+ uint16_t fb;
+};
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+extern unsigned int inswap_le32(unsigned int);
+
+#define SQUASHFS_INSWAP_LZMA_COMP_OPTS(s) { \
+ (s)->flags = inswap_le32((s)->flags); \
+ (s)->bit_opts = inswap_le16((s)->bit_opts); \
+ (s)->fb = inswap_le16((s)->fb); \
+ (s)->dict_size = inswap_le32((s)->dict_size); \
+}
+#else
+#define SQUASHFS_INSWAP_LZMA_COMP_OPTS(s)
+#endif
+
+#define MEMLIMIT (32 * 1024 * 1024)
+
+#define LZMA_OPT_LC_MIN 0
+#define LZMA_OPT_LC_MAX 4
+#define LZMA_OPT_LC_DEFAULT 3
+
+#define LZMA_OPT_LP_MIN 0
+#define LZMA_OPT_LP_MAX 4
+#define LZMA_OPT_LP_DEFAULT 0
+
+#define LZMA_OPT_PB_MIN 0
+#define LZMA_OPT_PB_MAX 4
+#define LZMA_OPT_PB_DEFAULT 2
+
+#define LZMA_OPT_FB_MIN 5
+#define LZMA_OPT_FB_MAX 273
+#define LZMA_OPT_FB_DEFAULT 64
+
+enum {
+ LZMA_OPT_LZMA = 1,
+ LZMA_OPT_XZ
+};
+
+struct lzma_xz_options {
+ int preset;
+ int extreme;
+ int lc;
+ int lp;
+ int pb;
+ int fb;
+ int dict_size;
+ int flags;
+};
+
+struct lzma_xz_options *lzma_xz_get_options(void);
+
+int lzma_xz_options(char *argv[], int argc, int lzmaver);
+
+int lzma_xz_options_post(int block_size, int lzmaver);
+
+void *lzma_xz_dump_options(int block_size, int *size, int flags);
+
+int lzma_xz_extract_options(int block_size, void *buffer, int size, int lzmaver);
+
+void lzma_xz_usage(int lzmaver);
+
+#endif
--- /dev/null
+++ b/squashfs-tools/lzma_xz_options.c
@@ -0,0 +1,365 @@
+/*
+ * Copyright (c) 2011
+ * Jonas Gorski <jonas.gorski@gmail.com>
+ *
+ * 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,
+ * 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * lzma_options.c
+ *
+ * Common options for LZMA1 and 2 compressors. Based on xz_wrapper.c
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <lzma.h>
+
+#include "lzma_xz_options.h"
+
+static const char const *lzmaver_str[] = { "", "lzma", "xz" };
+
+static struct lzma_xz_options options = {
+ .flags = 0,
+ .preset = 6,
+ .extreme = 0,
+ .lc = LZMA_OPT_LC_DEFAULT,
+ .lp = LZMA_OPT_LP_DEFAULT,
+ .pb = LZMA_OPT_PB_DEFAULT,
+ .fb = LZMA_OPT_FB_DEFAULT,
+ .dict_size = 0,
+};
+
+static float lzma_dict_percent = 0;
+
+struct lzma_xz_options *lzma_xz_get_options(void)
+{
+ return &options;
+}
+
+
+int lzma_xz_options(char *argv[], int argc, int lzmaver)
+{
+ const char *comp_name = lzmaver_str[lzmaver];
+
+ if(strcmp(argv[0], "-Xpreset") == 0) {
+ int preset;
+
+ if(argc < 2) {
+ fprintf(stderr, "%s: -Xpreset missing preset\n", comp_name);
+ goto failed;
+ }
+
+ preset = atoi(argv[1]);
+
+ if (preset < 0 || preset > 9) {
+ fprintf(stderr, "%s: -Xpreset invalid value\n", comp_name);
+ goto failed;
+ }
+ options.preset = preset;
+ return 1;
+ } else if(strcmp(argv[0], "-Xe") == 0) {
+ options.extreme = 1;
+ return 0;
+ } else if(strcmp(argv[0], "-Xlc") == 0) {
+ int lc;
+
+ if(argc < 2) {
+ fprintf(stderr, "%s: -Xlc missing lc\n", comp_name);
+ goto failed;
+ }
+
+ lc = atoi(argv[1]);
+
+ if (lc < LZMA_OPT_LC_MIN || lc > LZMA_OPT_LC_MAX) {
+ fprintf(stderr, "%s: -Xlc invalid value\n", comp_name);
+ goto failed;
+ }
+ options.lc = lc;
+ return 1;
+ } else if(strcmp(argv[0], "-Xlp") == 0) {
+ int lp;
+
+ if(argc < 2) {
+ fprintf(stderr, "%s: -Xlp missing lp\n", comp_name);
+ goto failed;
+ }
+
+ lp = atoi(argv[1]);
+
+ if (lp < LZMA_OPT_LP_MIN || lp > LZMA_OPT_LP_MAX) {
+ fprintf(stderr, "%s: -Xlp invalid value\n", comp_name);
+ goto failed;
+ }
+ options.lp = lp;
+ return 1;
+ } else if(strcmp(argv[0], "-Xpb") == 0) {
+ int pb;
+
+ if(argc < 2) {
+ fprintf(stderr, "%s: -Xpb missing pb\n", comp_name);
+ goto failed;
+ }
+
+ pb = atoi(argv[1]);
+
+ if (pb < LZMA_OPT_PB_MIN || pb > LZMA_OPT_PB_MAX) {
+ fprintf(stderr, "%s: -Xbp invalid value\n", comp_name);
+ goto failed;
+ }
+ options.pb = pb;
+ return 1;
+ } else if(strcmp(argv[0], "-Xfb") == 0) {
+ int fb;
+
+ if(argc < 2) {
+ fprintf(stderr, "%s: -Xfb missing fb\n", comp_name);
+ goto failed;
+ }
+
+ fb = atoi(argv[1]);
+
+ if (fb < LZMA_OPT_FB_MIN || fb > LZMA_OPT_FB_MAX) {
+ fprintf(stderr, "%s: -Xfb invalid value\n", comp_name);
+ goto failed;
+ }
+ options.fb = fb;
+ return 1;
+ } else if(strcmp(argv[0], "-Xdict-size") == 0) {
+ char *b;
+ float size;
+
+ if(argc < 2) {
+ fprintf(stderr, "%s: -Xdict-size missing dict-size\n", comp_name);
+ goto failed;
+ }
+
+ size = strtof(argv[1], &b);
+ if(*b == '%') {
+ if(size <= 0 || size > 100) {
+ fprintf(stderr, "%s: -Xdict-size percentage "
+ "should be 0 < dict-size <= 100\n", comp_name);
+ goto failed;
+ }
+
+ lzma_dict_percent = size;
+ options.dict_size = 0;
+ } else {
+ if((float) ((int) size) != size) {
+ fprintf(stderr, "%s: -Xdict-size can't be "
+ "fractional unless a percentage of the"
+ " block size\n", comp_name);
+ goto failed;
+ }
+
+ lzma_dict_percent = 0;
+ options.dict_size = (int) size;
+
+ if(*b == 'k' || *b == 'K')
+ options.dict_size *= 1024;
+ else if(*b == 'm' || *b == 'M')
+ options.dict_size *= 1024 * 1024;
+ else if(*b != '\0') {
+ fprintf(stderr, "%s: -Xdict-size invalid "
+ "dict-size\n", comp_name);
+ goto failed;
+ }
+ }
+
+ return 1;
+ }
+
+ return -1;
+
+failed:
+ return -2;
+
+}
+
+int lzma_xz_options_post(int block_size, int lzmaver)
+{
+ const char *comp_name = lzmaver_str[lzmaver];
+ /*
+ * if -Xdict-size has been specified use this to compute the datablock
+ * dictionary size
+ */
+ if(options.dict_size || lzma_dict_percent) {
+ int dict_size_min = (lzmaver == 1 ? 4096 : 8192);
+ int n;
+
+ if(options.dict_size) {
+ if(options.dict_size > block_size) {
+ fprintf(stderr, "%s: -Xdict-size is larger than"
+ " block_size\n", comp_name);
+ goto failed;
+ }
+ } else
+ options.dict_size = block_size * lzma_dict_percent / 100;
+
+ if(options.dict_size < dict_size_min) {
+ fprintf(stderr, "%s: -Xdict-size should be %i bytes "
+ "or larger\n", comp_name, dict_size_min);
+ goto failed;
+ }
+
+ /*
+ * dictionary_size must be storable in xz header as either
+ * 2^n or as 2^n+2^(n+1)
+ */
+ n = ffs(options.dict_size) - 1;
+ if(options.dict_size != (1 << n) &&
+ options.dict_size != ((1 << n) + (1 << (n + 1)))) {
+ fprintf(stderr, "%s: -Xdict-size is an unsupported "
+ "value, dict-size must be storable in %s "
+ "header\n", comp_name, comp_name);
+ fprintf(stderr, "as either 2^n or as 2^n+2^(n+1). "
+ "Example dict-sizes are 75%%, 50%%, 37.5%%, "
+ "25%%,\n");
+ fprintf(stderr, "or 32K, 16K, 8K etc.\n");
+ goto failed;
+ }
+
+ } else
+ /* No -Xdict-size specified, use defaults */
+ options.dict_size = block_size;
+
+ return 0;
+
+failed:
+ return -1;
+}
+
+static struct lzma_opts lzma_comp_opts;
+
+void *lzma_xz_dump_options(int block_size, int *size, int flags)
+{
+ /* No need to store default options */
+ if (options.preset == 6 &&
+ options.extreme == 0 &&
+ options.lc == LZMA_OPT_LC_DEFAULT &&
+ options.lp == LZMA_OPT_LC_DEFAULT &&
+ options.pb == LZMA_OPT_PB_DEFAULT &&
+ options.fb == 0 &&
+ options.dict_size == block_size &&
+ flags == 0)
+ return NULL;
+
+ *size = sizeof(struct lzma_opts);
+
+ lzma_comp_opts.flags |= flags;
+
+ if (options.extreme)
+ lzma_comp_opts.flags |= LZMA_OPT_EXTREME;
+
+ lzma_comp_opts.flags |= ((options.preset << LZMA_OPT_PRE_OFF) & LZMA_OPT_PRE_MASK);
+
+ lzma_comp_opts.bit_opts =
+ ((options.lc << LZMA_OPT_LC_OFF) & LZMA_OPT_LC_MASK) |
+ ((options.lp << LZMA_OPT_LP_OFF) & LZMA_OPT_LP_MASK) |
+ ((options.pb << LZMA_OPT_PB_OFF) & LZMA_OPT_PB_MASK);
+ lzma_comp_opts.fb = options.fb;
+ lzma_comp_opts.dict_size = options.dict_size;
+
+ SQUASHFS_INSWAP_LZMA_COMP_OPTS(&lzma_comp_opts);
+
+ return &lzma_comp_opts;
+}
+
+int lzma_xz_extract_options(int block_size, void *buffer, int size, int lzmaver)
+{
+ if (size == 0) {
+ /* default options */
+ options.preset = 6;
+ options.extreme = 0;
+ options.lc = LZMA_OPT_LC_DEFAULT;
+ options.lp = LZMA_OPT_LC_DEFAULT;
+ options.pb = LZMA_OPT_PB_DEFAULT;
+ options.fb = LZMA_OPT_FB_DEFAULT;
+ options.dict_size = block_size;
+ options.flags = 0;
+ } else {
+ struct lzma_opts *comp_opts = buffer;
+ int n;
+
+ if (size != sizeof(struct lzma_opts))
+ goto failed;
+
+ SQUASHFS_INSWAP_LZMA_COMP_OPTS(comp_opts);
+
+ options.flags = comp_opts->flags & LZMA_OPT_FLT_MASK;
+ options.preset = (comp_opts->flags & LZMA_OPT_PRE_MASK) >> LZMA_OPT_PRE_OFF;
+ options.extreme = !!(comp_opts->flags & LZMA_OPT_EXTREME);
+
+ options.lc = (comp_opts->bit_opts & LZMA_OPT_LC_MASK) >> LZMA_OPT_LC_OFF;
+ options.lp = (comp_opts->bit_opts & LZMA_OPT_LP_MASK) >> LZMA_OPT_LP_OFF;
+ options.pb = (comp_opts->bit_opts & LZMA_OPT_PB_MASK) >> LZMA_OPT_PB_OFF;
+ options.fb = comp_opts->fb;
+ options.dict_size = comp_opts->dict_size;
+
+ /* check that the LZMA bit options are in range */
+ if (options.lc < LZMA_OPT_LC_MIN || options.lc > LZMA_OPT_LC_MAX ||
+ options.lp < LZMA_OPT_LP_MIN || options.lp > LZMA_OPT_LP_MAX ||
+ options.pb < LZMA_OPT_PB_MIN || options.pb > LZMA_OPT_PB_MAX ||
+ options.fb < LZMA_OPT_FB_MIN || options.fb > LZMA_OPT_FB_MAX)
+ goto failed;
+
+ /*
+ * check that the dictionary size seems correct - the dictionary
+ * size should 2^n or 2^n+2^(n+1)
+ */
+ n = ffs(options.dict_size) - 1;
+ if(options.dict_size != (1 << n) &&
+ options.dict_size != ((1 << n) + (1 << (n + 1))))
+ goto failed;
+
+ }
+
+ return 0;
+
+failed:
+ fprintf(stderr, "%s: error reading stored compressor options from "
+ "filesystem!\n", lzmaver_str[lzmaver]);
+ return -1;
+}
+
+void lzma_xz_usage(int lzmaver)
+{
+ fprintf(stderr, "\t -Xpreset <preset>\n");
+ fprintf(stderr, "\t\tcompression preset (0-9, default 6)\n");
+ fprintf(stderr, "\t -Xe\n");
+ fprintf(stderr, "\t\tTry to improve compression ratio by using more ");
+ fprintf(stderr, "CPU time.\n");
+ fprintf(stderr, "\t -Xlc <lc>\n");
+ fprintf(stderr, "\t\tNumber of literal context bits (0-4, default 3)\n");
+ fprintf(stderr, "\t -Xlp <lp>\n");
+ fprintf(stderr, "\t\tNumber of literal position bits (0-4, default 0)\n");
+ fprintf(stderr, "\t -Xpb <pb>\n");
+ fprintf(stderr, "\t\tNumber of position bits (0-4, default 2)\n");
+ fprintf(stderr, "\t -Xnice <nice>\n");
+ fprintf(stderr, "\t\tNice length of a match (5-273, default 64)\n");
+ fprintf(stderr, "\t -Xdict-size <dict-size>\n");
+ fprintf(stderr, "\t\tUse <dict-size> as the %s dictionary size. The",
+ lzmaver == LZMA_OPT_LZMA ? "LZMA" : "XZ");
+ fprintf(stderr, " dictionary size\n\t\tcan be specified as a");
+ fprintf(stderr, " percentage of the block size, or as an\n\t\t");
+ fprintf(stderr, "absolute value. The dictionary size must be less");
+ fprintf(stderr, " than or equal\n\t\tto the block size and %d bytes",
+ lzmaver == LZMA_OPT_LZMA ? 4096 : 8192);
+ fprintf(stderr, " or larger. It must also be\n\t\tstorable in the lzma");
+ fprintf(stderr, " header as either 2^n or as 2^n+2^(n+1).\n\t\t");
+ fprintf(stderr, "Example dict-sizes are 75%%, 50%%, 37.5%%, 25%%, or");
+ fprintf(stderr, " 32K, 16K, 8K\n\t\tetc.\n");
+
+}
--- a/squashfs-tools/lzma_xz_wrapper.c
+++ b/squashfs-tools/lzma_xz_wrapper.c
@@ -27,6 +27,7 @@
#include "squashfs_fs.h"
#include "compressor.h"
+#include "lzma_xz_options.h"
#define LZMA_PROPS_SIZE 5
#define LZMA_UNCOMP_SIZE 8
@@ -38,13 +39,27 @@
static int lzma_compress(void *dummy, void *dest, void *src, int size,
int block_size, int *error)
{
+ uint32_t preset;
unsigned char *d = (unsigned char *) dest;
+ struct lzma_xz_options *opts = lzma_xz_get_options();
+
lzma_options_lzma opt;
lzma_stream strm = LZMA_STREAM_INIT;
int res;
- lzma_lzma_preset(&opt, LZMA_OPTIONS);
- opt.dict_size = block_size;
+ preset = opts->preset;
+
+ if (opts->extreme)
+ preset |= LZMA_PRESET_EXTREME;
+
+ lzma_lzma_preset(&opt, opts->preset);
+ opt.lc = opts->lc;
+ opt.lp = opts->lp;
+ opt.pb = opts->pb;
+ if (opts->fb)
+ opt.nice_len = opts->fb;
+
+ opt.dict_size = opts->dict_size;
res = lzma_alone_encoder(&strm, &opt);
if(res != LZMA_OK) {
@@ -143,13 +158,45 @@ failed:
return -1;
}
+static int lzma_options(char *argv[], int argc)
+{
+ return lzma_xz_options(argv, argc, LZMA_OPT_LZMA);
+}
+
+
+static int lzma_options_post(int block_size)
+{
+ return lzma_xz_options_post(block_size, LZMA_OPT_LZMA);
+}
+
+
+static void *lzma_dump_options(int block_size, int *size)
+{
+ return lzma_xz_dump_options(block_size, size, 0);
+}
+
+
+static int lzma_extract_options(int block_size, void *buffer, int size)
+{
+ return lzma_xz_extract_options(block_size, buffer, size, LZMA_OPT_LZMA);
+}
+
+
+void lzma_usage()
+{
+ lzma_xz_usage(LZMA_OPT_LZMA);
+}
+
struct compressor lzma_comp_ops = {
.init = NULL,
.compress = lzma_compress,
.uncompress = lzma_uncompress,
- .options = NULL,
- .usage = NULL,
+ .options = lzma_options,
+ .options_post = lzma_options_post,
+ .dump_options = lzma_dump_options,
+ .extract_options = lzma_extract_options,
+ .usage = lzma_usage,
.id = LZMA_COMPRESSION,
.name = "lzma",
.supported = 1
--- a/squashfs-tools/xz_wrapper.h
+++ b/squashfs-tools/xz_wrapper.h
@@ -24,25 +24,6 @@
*
*/
-#ifndef linux
-#define __BYTE_ORDER BYTE_ORDER
-#define __BIG_ENDIAN BIG_ENDIAN
-#define __LITTLE_ENDIAN LITTLE_ENDIAN
-#else
-#include <endian.h>
-#endif
-
-#if __BYTE_ORDER == __BIG_ENDIAN
-extern unsigned int inswap_le32(unsigned int);
-
-#define SQUASHFS_INSWAP_COMP_OPTS(s) { \
- (s)->dictionary_size = inswap_le32((s)->dictionary_size); \
- (s)->flags = inswap_le32((s)->flags); \
-}
-#else
-#define SQUASHFS_INSWAP_COMP_OPTS(s)
-#endif
-
#define MEMLIMIT (32 * 1024 * 1024)
struct bcj {
--- a/squashfs-tools/xz_wrapper.c
+++ b/squashfs-tools/xz_wrapper.c
@@ -30,6 +30,7 @@
#include "squashfs_fs.h"
#include "xz_wrapper.h"
#include "compressor.h"
+#include "lzma_xz_options.h"
static struct bcj bcj[] = {
{ "x86", LZMA_FILTER_X86, 0 },
@@ -41,22 +42,18 @@ static struct bcj bcj[] = {
{ NULL, LZMA_VLI_UNKNOWN, 0 }
};
-static struct comp_opts comp_opts;
-
static int filter_count = 1;
-static int dictionary_size = 0;
-static float dictionary_percent = 0;
static int xz_options(char *argv[], int argc)
{
- int i;
- char *name;
-
if(strcmp(argv[0], "-Xbcj") == 0) {
+ int i;
+ char *name;
+
if(argc < 2) {
fprintf(stderr, "xz: -Xbcj missing filter\n");
- goto failed;
+ return -2;
}
name = argv[1];
@@ -76,190 +73,50 @@ static int xz_options(char *argv[], int
}
if(bcj[i].name == NULL) {
fprintf(stderr, "xz: -Xbcj unrecognised "
- "filter\n");
- goto failed;
- }
- }
-
- return 1;
- } else if(strcmp(argv[0], "-Xdict-size") == 0) {
- char *b;
- float size;
-
- if(argc < 2) {
- fprintf(stderr, "xz: -Xdict-size missing dict-size\n");
- goto failed;
- }
-
- size = strtof(argv[1], &b);
- if(*b == '%') {
- if(size <= 0 || size > 100) {
- fprintf(stderr, "xz: -Xdict-size percentage "
- "should be 0 < dict-size <= 100\n");
- goto failed;
- }
-
- dictionary_percent = size;
- dictionary_size = 0;
- } else {
- if((float) ((int) size) != size) {
- fprintf(stderr, "xz: -Xdict-size can't be "
- "fractional unless a percentage of the"
- " block size\n");
- goto failed;
- }
-
- dictionary_percent = 0;
- dictionary_size = (int) size;
-
- if(*b == 'k' || *b == 'K')
- dictionary_size *= 1024;
- else if(*b == 'm' || *b == 'M')
- dictionary_size *= 1024 * 1024;
- else if(*b != '\0') {
- fprintf(stderr, "xz: -Xdict-size invalid "
- "dict-size\n");
- goto failed;
+ "filter\n");
+ return -2;
}
}
-
return 1;
+ } else {
+ return lzma_xz_options(argv, argc, LZMA_OPT_XZ);
}
-
- return -1;
-
-failed:
- return -2;
}
static int xz_options_post(int block_size)
{
- /*
- * if -Xdict-size has been specified use this to compute the datablock
- * dictionary size
- */
- if(dictionary_size || dictionary_percent) {
- int n;
-
- if(dictionary_size) {
- if(dictionary_size > block_size) {
- fprintf(stderr, "xz: -Xdict-size is larger than"
- " block_size\n");
- goto failed;
- }
- } else
- dictionary_size = block_size * dictionary_percent / 100;
-
- if(dictionary_size < 8192) {
- fprintf(stderr, "xz: -Xdict-size should be 8192 bytes "
- "or larger\n");
- goto failed;
- }
-
- /*
- * dictionary_size must be storable in xz header as either
- * 2^n or as 2^n+2^(n+1)
- */
- n = ffs(dictionary_size) - 1;
- if(dictionary_size != (1 << n) &&
- dictionary_size != ((1 << n) + (1 << (n + 1)))) {
- fprintf(stderr, "xz: -Xdict-size is an unsupported "
- "value, dict-size must be storable in xz "
- "header\n");
- fprintf(stderr, "as either 2^n or as 2^n+2^(n+1). "
- "Example dict-sizes are 75%%, 50%%, 37.5%%, "
- "25%%,\n");
- fprintf(stderr, "or 32K, 16K, 8K etc.\n");
- goto failed;
- }
-
- } else
- /* No -Xdict-size specified, use defaults */
- dictionary_size = block_size;
-
- return 0;
-
-failed:
- return -1;
+ return lzma_xz_options_post(block_size, LZMA_OPT_XZ);
}
static void *xz_dump_options(int block_size, int *size)
{
- int flags = 0, i;
-
- /*
- * don't store compressor specific options in file system if the
- * default options are being used - no compressor options in the
- * file system means the default options are always assumed
- *
- * Defaults are:
- * metadata dictionary size: SQUASHFS_METADATA_SIZE
- * datablock dictionary size: block_size
- * 1 filter
- */
- if(dictionary_size == block_size && filter_count == 1)
- return NULL;
+ int i, flags = 0;
for(i = 0; bcj[i].name; i++)
flags |= bcj[i].selected << i;
- comp_opts.dictionary_size = dictionary_size;
- comp_opts.flags = flags;
-
- SQUASHFS_INSWAP_COMP_OPTS(&comp_opts);
-
- *size = sizeof(comp_opts);
- return &comp_opts;
+ return lzma_xz_dump_options(block_size, size, flags);
}
static int xz_extract_options(int block_size, void *buffer, int size)
{
- struct comp_opts *comp_opts = buffer;
- int flags, i, n;
-
- if(size == 0) {
- /* set defaults */
- dictionary_size = block_size;
- flags = 0;
- } else {
- /* check passed comp opts struct is of the correct length */
- if(size != sizeof(struct comp_opts))
- goto failed;
-
- SQUASHFS_INSWAP_COMP_OPTS(comp_opts);
-
- dictionary_size = comp_opts->dictionary_size;
- flags = comp_opts->flags;
-
- /*
- * check that the dictionary size seems correct - the dictionary
- * size should 2^n or 2^n+2^(n+1)
- */
- n = ffs(dictionary_size) - 1;
- if(dictionary_size != (1 << n) &&
- dictionary_size != ((1 << n) + (1 << (n + 1))))
- goto failed;
- }
+ int ret = lzma_xz_extract_options(block_size, buffer, size, LZMA_OPT_XZ);
- filter_count = 1;
- for(i = 0; bcj[i].name; i++) {
- if((flags >> i) & 1) {
- bcj[i].selected = 1;
- filter_count ++;
- } else
- bcj[i].selected = 0;
+ if (!ret) {
+ int i;
+ struct lzma_xz_options *opts = lzma_xz_get_options();
+ for(i = 0; bcj[i].name; i++) {
+ if((opts->flags >> i) & 1) {
+ bcj[i].selected = 1;
+ filter_count ++;
+ } else
+ bcj[i].selected = 0;
+ }
}
-
- return 0;
-
-failed:
- fprintf(stderr, "xz: error reading stored compressor options from "
- "filesystem!\n");
-
- return -1;
+ return ret;
}
@@ -268,6 +125,7 @@ static int xz_init(void **strm, int bloc
int i, j, filters = datablock ? filter_count : 1;
struct filter *filter = malloc(filters * sizeof(struct filter));
struct xz_stream *stream;
+ struct lzma_xz_options *opts = lzma_xz_get_options();
if(filter == NULL)
goto failed;
@@ -281,7 +139,7 @@ static int xz_init(void **strm, int bloc
memset(filter, 0, filters * sizeof(struct filter));
- stream->dictionary_size = datablock ? dictionary_size :
+ stream->dictionary_size = datablock ? opts->dict_size :
SQUASHFS_METADATA_SIZE;
filter[0].filter[0].id = LZMA_FILTER_LZMA2;
@@ -323,14 +181,25 @@ static int xz_compress(void *strm, void
lzma_ret res = 0;
struct xz_stream *stream = strm;
struct filter *selected = NULL;
+ struct lzma_xz_options *opts = lzma_xz_get_options();
stream->filter[0].buffer = dest;
for(i = 0; i < stream->filters; i++) {
+ uint32_t preset = opts->preset;
struct filter *filter = &stream->filter[i];
- if(lzma_lzma_preset(&stream->opt, LZMA_PRESET_DEFAULT))
- goto failed;
+ if (opts->extreme)
+ preset |= LZMA_PRESET_EXTREME;
+
+ if(lzma_lzma_preset(&stream->opt, preset))
+ goto failed;
+
+ stream->opt.lc = opts->lc;
+ stream->opt.lp = opts->lp;
+ stream->opt.pb = opts->pb;
+ if (opts->fb)
+ stream->opt.nice_len = opts->fb;
stream->opt.dict_size = stream->dictionary_size;
@@ -384,22 +253,13 @@ static int xz_uncompress(void *dest, voi
void xz_usage()
{
+ lzma_xz_usage(LZMA_OPT_XZ);
fprintf(stderr, "\t -Xbcj filter1,filter2,...,filterN\n");
fprintf(stderr, "\t\tCompress using filter1,filter2,...,filterN in");
fprintf(stderr, " turn\n\t\t(in addition to no filter), and choose");
fprintf(stderr, " the best compression.\n");
fprintf(stderr, "\t\tAvailable filters: x86, arm, armthumb,");
fprintf(stderr, " powerpc, sparc, ia64\n");
- fprintf(stderr, "\t -Xdict-size <dict-size>\n");
- fprintf(stderr, "\t\tUse <dict-size> as the XZ dictionary size. The");
- fprintf(stderr, " dictionary size\n\t\tcan be specified as a");
- fprintf(stderr, " percentage of the block size, or as an\n\t\t");
- fprintf(stderr, "absolute value. The dictionary size must be less");
- fprintf(stderr, " than or equal\n\t\tto the block size and 8192 bytes");
- fprintf(stderr, " or larger. It must also be\n\t\tstorable in the xz");
- fprintf(stderr, " header as either 2^n or as 2^n+2^(n+1).\n\t\t");
- fprintf(stderr, "Example dict-sizes are 75%%, 50%%, 37.5%%, 25%%, or");
- fprintf(stderr, " 32K, 16K, 8K\n\t\tetc.\n");
}
--- a/squashfs-tools/Makefile
+++ b/squashfs-tools/Makefile
@@ -140,6 +140,8 @@ COMPRESSORS += xz
endif
ifneq ($(LZMA_XZ_SUPPORT)$(XZ_SUPPORT),)
+MKSQUASHFS_OBJS += lzma_xz_options.o
+UNSQUASHFS_OBJS += lzma_xz_options.o
ifneq ($(LZMA_LIB),)
MKSQUASHFS_OBJS += $(LZMA_LIB)
UNSQUASHFS_OBJS += $(LZMA_LIB)
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