diff options
Diffstat (limited to 'meta-aspeed/recipes-kernel/linux/files/patch-2.6.28.9/0002-bzip2-lzma-config-and-initramfs-support-for-bzip2-lz.patch')
| -rw-r--r-- | meta-aspeed/recipes-kernel/linux/files/patch-2.6.28.9/0002-bzip2-lzma-config-and-initramfs-support-for-bzip2-lz.patch | 585 |
1 files changed, 585 insertions, 0 deletions
diff --git a/meta-aspeed/recipes-kernel/linux/files/patch-2.6.28.9/0002-bzip2-lzma-config-and-initramfs-support-for-bzip2-lz.patch b/meta-aspeed/recipes-kernel/linux/files/patch-2.6.28.9/0002-bzip2-lzma-config-and-initramfs-support-for-bzip2-lz.patch new file mode 100644 index 0000000..1fca71b --- /dev/null +++ b/meta-aspeed/recipes-kernel/linux/files/patch-2.6.28.9/0002-bzip2-lzma-config-and-initramfs-support-for-bzip2-lz.patch @@ -0,0 +1,585 @@ +From 46b4296ca3e989127c8646e5c115561f9a2f8fa3 Mon Sep 17 00:00:00 2001 +From: Alain Knaff <alain@knaff.lu> +Date: Sun, 4 Jan 2009 22:46:17 +0100 +Subject: bzip2/lzma: config and initramfs support for bzip2/lzma decompression + +Impact: New code for initramfs decompression, new features + +This is the second part of the bzip2/lzma patch + +The bzip patch is based on an idea by Christian Ludwig, includes support for +compressing the kernel with bzip2 or lzma rather than gzip. Both +compressors give smaller sizes than gzip. Lzma's decompresses faster +than bzip2. + +It also supports ramdisks and initramfs' compressed using these two +compressors. + +The functionality has been successfully used for a couple of years by +the udpcast project + +This version applies to "tip" kernel 2.6.28 + +This part contains: +- support for new compressions (bzip2 and lzma) in initramfs and +old-style ramdisk +- config dialog for kernel compression (but new kernel compressions +not yet supported) + +Signed-off-by: Alain Knaff <alain@knaff.lu> +Signed-off-by: H. Peter Anvin <hpa@zytor.com> +--- + .../linux-aspeed-2.6.28.9/drivers/block/Kconfig | 25 +++ + .../linux/files/linux-aspeed-2.6.28.9/init/Kconfig | 50 ++++++ + .../linux-aspeed-2.6.28.9/init/do_mounts_rd.c | 182 ++++++++------------- + .../files/linux-aspeed-2.6.28.9/init/initramfs.c | 123 +++++--------- + .../linux/files/linux-aspeed-2.6.28.9/lib/Makefile | 3 +- + 5 files changed, 184 insertions(+), 199 deletions(-) + +diff --git a/drivers/block/Kconfig +index 0344a8a..7955944 100644 +--- a/drivers/block/Kconfig ++++ b/drivers/block/Kconfig +@@ -358,6 +358,31 @@ config BLK_DEV_XIP + will prevent RAM block device backing store memory from being + allocated from highmem (only a problem for highmem systems). + ++config RD_BZIP2 ++ bool "Initial ramdisk compressed using bzip2" ++ default n ++ depends on BLK_DEV_INITRD=y ++ help ++ Support loading of a bzip2 encoded initial ramdisk or cpio buffer ++ If unsure, say N. ++ ++config RD_LZMA ++ bool "Initial ramdisk compressed using lzma" ++ default n ++ depends on BLK_DEV_INITRD=y ++ help ++ Support loading of a lzma encoded initial ramdisk or cpio buffer ++ If unsure, say N. ++ ++config RD_GZIP ++ bool "Initial ramdisk compressed using gzip" ++ default y ++ depends on BLK_DEV_INITRD=y ++ select ZLIB_INFLATE ++ help ++ Support loading of a gzip encoded initial ramdisk or cpio buffer. ++ If unsure, say Y. ++ + config CDROM_PKTCDVD + tristate "Packet writing on CD/DVD media" + depends on !UML +diff --git a/init/Kconfig +index 83b6905..d7f95fe 100644 +--- a/init/Kconfig ++++ b/init/Kconfig +@@ -101,6 +101,56 @@ config LOCALVERSION_AUTO + + which is done within the script "scripts/setlocalversion".) + ++choice ++ prompt "Kernel compression mode" ++ default KERNEL_GZIP ++ help ++ The linux kernel is a kind of self-extracting executable. ++ Several compression algorithms are available, which differ ++ in efficiency, compression and decompression speed. ++ Compression speed is only relevant when building a kernel. ++ Decompression speed is relevant at each boot. ++ ++ If you have any problems with bzip2 or lzma compressed ++ kernels, mail me (Alain Knaff) <alain@knaff.lu>. (An older ++ version of this functionality (bzip2 only), for 2.4, was ++ supplied by Christian Ludwig) ++ ++ High compression options are mostly useful for users, who ++ are low on disk space (embedded systems), but for whom ram ++ size matters less. ++ ++ If in doubt, select 'gzip' ++ ++config KERNEL_GZIP ++ bool "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. ++ ++config KERNEL_BZIP2 ++ bool "Bzip2" ++ help ++ Its compression ratio and speed is intermediate. ++ Decompression speed is slowest among the 3. ++ The kernel size is about 10 per cent smaller with bzip2, ++ in comparison to gzip. ++ Bzip2 uses a large amount of memory. For modern kernels ++ you will need at least 8MB RAM or more for booting. ++ ++config KERNEL_LZMA ++ bool "LZMA" ++ help ++ The most recent compression algorithm. ++ Its ratio is best, decompression speed is between the other ++ 2. Compression is slowest. ++ The kernel size is about 33 per cent smaller with lzma, ++ in comparison to gzip. ++ ++endchoice ++ ++ + config SWAP + bool "Support for paging of anonymous memory (swap)" + depends on MMU && BLOCK +diff --git a/init/do_mounts_rd.c +index a7c748f..dcaeb1f 100644 +--- a/init/do_mounts_rd.c ++++ b/init/do_mounts_rd.c +@@ -10,6 +10,12 @@ + + #include "do_mounts.h" + ++#include <linux/decompress/generic.h> ++ ++#include <linux/decompress/bunzip2.h> ++#include <linux/decompress/unlzma.h> ++#include <linux/decompress/inflate.h> ++ + int __initdata rd_prompt = 1;/* 1 = prompt for RAM disk, 0 = don't prompt */ + + static int __init prompt_ramdisk(char *str) +@@ -28,7 +34,7 @@ static int __init ramdisk_start_setup(char *str) + } + __setup("ramdisk_start=", ramdisk_start_setup); + +-static int __init crd_load(int in_fd, int out_fd); ++static int __init crd_load(int in_fd, int out_fd, decompress_fn deco); + + /* + * This routine tries to find a RAM disk image to load, and returns the +@@ -44,7 +50,7 @@ static int __init crd_load(int in_fd, int out_fd); + * gzip + */ + static int __init +-identify_ramdisk_image(int fd, int start_block) ++identify_ramdisk_image(int fd, int start_block, decompress_fn *decompressor) + { + const int size = 512; + struct minix_super_block *minixsb; +@@ -70,6 +76,7 @@ identify_ramdisk_image(int fd, int start_block) + sys_lseek(fd, start_block * BLOCK_SIZE, 0); + sys_read(fd, buf, size); + ++#ifdef CONFIG_RD_GZIP + /* + * If it matches the gzip magic numbers, return 0 + */ +@@ -77,9 +84,39 @@ identify_ramdisk_image(int fd, int start_block) + printk(KERN_NOTICE + "RAMDISK: Compressed image found at block %d\n", + start_block); ++ *decompressor = gunzip; ++ nblocks = 0; ++ goto done; ++ } ++#endif ++ ++#ifdef CONFIG_RD_BZIP2 ++ /* ++ * If it matches the bzip2 magic numbers, return -1 ++ */ ++ if (buf[0] == 0x42 && (buf[1] == 0x5a)) { ++ printk(KERN_NOTICE ++ "RAMDISK: Bzipped image found at block %d\n", ++ start_block); ++ *decompressor = bunzip2; ++ nblocks = 0; ++ goto done; ++ } ++#endif ++ ++#ifdef CONFIG_RD_LZMA ++ /* ++ * If it matches the lzma magic numbers, return -1 ++ */ ++ if (buf[0] == 0x5d && (buf[1] == 0x00)) { ++ printk(KERN_NOTICE ++ "RAMDISK: Lzma image found at block %d\n", ++ start_block); ++ *decompressor = unlzma; + nblocks = 0; + goto done; + } ++#endif + + /* romfs is at block zero too */ + if (romfsb->word0 == ROMSB_WORD0 && +@@ -143,6 +180,7 @@ int __init rd_load_image(char *from) + int nblocks, i, disk; + char *buf = NULL; + unsigned short rotate = 0; ++ decompress_fn decompressor = NULL; + #if !defined(CONFIG_S390) && !defined(CONFIG_PPC_ISERIES) + char rotator[4] = { '|' , '/' , '-' , '\\' }; + #endif +@@ -155,12 +193,12 @@ int __init rd_load_image(char *from) + if (in_fd < 0) + goto noclose_input; + +- nblocks = identify_ramdisk_image(in_fd, rd_image_start); ++ nblocks = identify_ramdisk_image(in_fd, rd_image_start, &decompressor); + if (nblocks < 0) + goto done; + + if (nblocks == 0) { +- if (crd_load(in_fd, out_fd) == 0) ++ if (crd_load(in_fd, out_fd, decompressor) == 0) + goto successful_load; + goto done; + } +@@ -259,138 +297,48 @@ int __init rd_load_disk(int n) + return rd_load_image("/dev/root"); + } + +-/* +- * gzip declarations +- */ +- +-#define OF(args) args +- +-#ifndef memzero +-#define memzero(s, n) memset ((s), 0, (n)) +-#endif +- +-typedef unsigned char uch; +-typedef unsigned short ush; +-typedef unsigned long ulg; +- +-#define INBUFSIZ 4096 +-#define WSIZE 0x8000 /* window size--must be a power of two, and */ +- /* at least 32K for zip's deflate method */ +- +-static uch *inbuf; +-static uch *window; +- +-static unsigned insize; /* valid bytes in inbuf */ +-static unsigned inptr; /* index of next byte to be processed in inbuf */ +-static unsigned outcnt; /* bytes in output buffer */ + static int exit_code; +-static int unzip_error; +-static long bytes_out; ++static int decompress_error; + static int crd_infd, crd_outfd; + +-#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf()) +- +-/* Diagnostic functions (stubbed out) */ +-#define Assert(cond,msg) +-#define Trace(x) +-#define Tracev(x) +-#define Tracevv(x) +-#define Tracec(c,x) +-#define Tracecv(c,x) +- +-#define STATIC static +-#define INIT __init +- +-static int __init fill_inbuf(void); +-static void __init flush_window(void); +-static void __init error(char *m); +- +-#define NO_INFLATE_MALLOC +- +-#include "../lib/inflate.c" +- +-/* =========================================================================== +- * Fill the input buffer. This is called only when the buffer is empty +- * and at least one byte is really needed. +- * Returning -1 does not guarantee that gunzip() will ever return. +- */ +-static int __init fill_inbuf(void) ++static int __init compr_fill(void *buf, unsigned int len) + { +- if (exit_code) return -1; +- +- insize = sys_read(crd_infd, inbuf, INBUFSIZ); +- if (insize == 0) { +- error("RAMDISK: ran out of compressed data"); +- return -1; +- } +- +- inptr = 1; +- +- return inbuf[0]; ++ int r = sys_read(crd_infd, buf, len); ++ if (r < 0) ++ printk(KERN_ERR "RAMDISK: error while reading compressed data"); ++ else if (r == 0) ++ printk(KERN_ERR "RAMDISK: EOF while reading compressed data"); ++ return r; + } + +-/* =========================================================================== +- * Write the output window window[0..outcnt-1] and update crc and bytes_out. +- * (Used for the decompressed data only.) +- */ +-static void __init flush_window(void) ++static int __init compr_flush(void *window, unsigned int outcnt) + { +- ulg c = crc; /* temporary variable */ +- unsigned n, written; +- uch *in, ch; +- +- written = sys_write(crd_outfd, window, outcnt); +- if (written != outcnt && unzip_error == 0) { +- printk(KERN_ERR "RAMDISK: incomplete write (%d != %d) %ld\n", +- written, outcnt, bytes_out); +- unzip_error = 1; +- } +- in = window; +- for (n = 0; n < outcnt; n++) { +- ch = *in++; +- c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8); +- } +- crc = c; +- bytes_out += (ulg)outcnt; +- outcnt = 0; ++ int written = sys_write(crd_outfd, window, outcnt); ++ if (written != outcnt) { ++ if (decompress_error == 0) ++ printk(KERN_ERR ++ "RAMDISK: incomplete write (%d != %d)\n", ++ written, outcnt); ++ decompress_error = 1; ++ return -1; ++ } ++ return outcnt; + } + + static void __init error(char *x) + { + printk(KERN_ERR "%s\n", x); + exit_code = 1; +- unzip_error = 1; ++ decompress_error = 1; + } + +-static int __init crd_load(int in_fd, int out_fd) ++static int __init crd_load(int in_fd, int out_fd, decompress_fn deco) + { + int result; +- +- insize = 0; /* valid bytes in inbuf */ +- inptr = 0; /* index of next byte to be processed in inbuf */ +- outcnt = 0; /* bytes in output buffer */ +- exit_code = 0; +- bytes_out = 0; +- crc = (ulg)0xffffffffL; /* shift register contents */ +- + crd_infd = in_fd; + crd_outfd = out_fd; +- inbuf = kmalloc(INBUFSIZ, GFP_KERNEL); +- if (!inbuf) { +- printk(KERN_ERR "RAMDISK: Couldn't allocate gzip buffer\n"); +- return -1; +- } +- window = kmalloc(WSIZE, GFP_KERNEL); +- if (!window) { +- printk(KERN_ERR "RAMDISK: Couldn't allocate gzip window\n"); +- kfree(inbuf); +- return -1; +- } +- makecrc(); +- result = gunzip(); +- if (unzip_error) ++ result = deco(NULL, 0, compr_fill, compr_flush, NULL, NULL, error); ++ if (decompress_error) + result = 1; +- kfree(inbuf); +- kfree(window); + return result; + } +diff --git a/init/initramfs.c +index 4f5ba75..40bd4fb 100644 +--- a/init/initramfs.c ++++ b/init/initramfs.c +@@ -389,11 +389,14 @@ static int __init write_buffer(char *buf, unsigned len) + return len - count; + } + +-static void __init flush_buffer(char *buf, unsigned len) ++ ++static int __init flush_buffer(void *bufv, unsigned len) + { ++ char *buf = (char *) bufv; + int written; ++ int origLen = len; + if (message) +- return; ++ return -1; + while ((written = write_buffer(buf, len)) < len && !message) { + char c = buf[written]; + if (c == '0') { +@@ -407,73 +410,14 @@ static void __init flush_buffer(char *buf, unsigned len) + } else + error("junk in compressed archive"); + } ++ return origLen; + } + +-/* +- * gzip declarations +- */ +- +-#define OF(args) args +- +-#ifndef memzero +-#define memzero(s, n) memset ((s), 0, (n)) +-#endif +- +-typedef unsigned char uch; +-typedef unsigned short ush; +-typedef unsigned long ulg; +- +-#define WSIZE 0x8000 /* window size--must be a power of two, and */ +- /* at least 32K for zip's deflate method */ +- +-static uch *inbuf; +-static uch *window; +- +-static unsigned insize; /* valid bytes in inbuf */ +-static unsigned inptr; /* index of next byte to be processed in inbuf */ +-static unsigned outcnt; /* bytes in output buffer */ +-static long bytes_out; +- +-#define get_byte() (inptr < insize ? inbuf[inptr++] : -1) +- +-/* Diagnostic functions (stubbed out) */ +-#define Assert(cond,msg) +-#define Trace(x) +-#define Tracev(x) +-#define Tracevv(x) +-#define Tracec(c,x) +-#define Tracecv(c,x) +- +-#define STATIC static +-#define INIT __init +- +-static void __init flush_window(void); +-static void __init error(char *m); +- +-#define NO_INFLATE_MALLOC ++static unsigned my_inptr; /* index of next byte to be processed in inbuf */ + +-#include "../lib/inflate.c" +- +-/* =========================================================================== +- * Write the output window window[0..outcnt-1] and update crc and bytes_out. +- * (Used for the decompressed data only.) +- */ +-static void __init flush_window(void) +-{ +- ulg c = crc; /* temporary variable */ +- unsigned n; +- uch *in, ch; +- +- flush_buffer(window, outcnt); +- in = window; +- for (n = 0; n < outcnt; n++) { +- ch = *in++; +- c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8); +- } +- crc = c; +- bytes_out += (ulg)outcnt; +- outcnt = 0; +-} ++#include <linux/decompress/bunzip2.h> ++#include <linux/decompress/unlzma.h> ++#include <linux/decompress/inflate.h> + + static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only) + { +@@ -482,9 +426,10 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only) + header_buf = kmalloc(110, GFP_KERNEL); + symlink_buf = kmalloc(PATH_MAX + N_ALIGN(PATH_MAX) + 1, GFP_KERNEL); + name_buf = kmalloc(N_ALIGN(PATH_MAX), GFP_KERNEL); +- window = kmalloc(WSIZE, GFP_KERNEL); +- if (!window || !header_buf || !symlink_buf || !name_buf) ++ ++ if (!header_buf || !symlink_buf || !name_buf) + panic("can't allocate buffers"); ++ + state = Start; + this_header = 0; + message = NULL; +@@ -504,22 +449,38 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only) + continue; + } + this_header = 0; +- insize = len; +- inbuf = buf; +- inptr = 0; +- outcnt = 0; /* bytes in output buffer */ +- bytes_out = 0; +- crc = (ulg)0xffffffffL; /* shift register contents */ +- makecrc(); +- gunzip(); ++ if (!gunzip(buf, len, NULL, flush_buffer, NULL, ++ &my_inptr, error) && ++ message == NULL) ++ goto ok; ++ ++#ifdef CONFIG_RD_BZIP2 ++ message = NULL; /* Zero out message, or else cpio will ++ think an error has already occured */ ++ if (!bunzip2(buf, len, NULL, flush_buffer, NULL, ++ &my_inptr, error) && ++ message == NULL) { ++ goto ok; ++ } ++#endif ++ ++#ifdef CONFIG_RD_LZMA ++ message = NULL; /* Zero out message, or else cpio will ++ think an error has already occured */ ++ if (!unlzma(buf, len, NULL, flush_buffer, NULL, ++ &my_inptr, error) && ++ message == NULL) { ++ goto ok; ++ } ++#endif ++ok: + if (state != Reset) +- error("junk in gzipped archive"); +- this_header = saved_offset + inptr; +- buf += inptr; +- len -= inptr; ++ error("junk in compressed archive"); ++ this_header = saved_offset + my_inptr; ++ buf += my_inptr; ++ len -= my_inptr; + } + dir_utime(); +- kfree(window); + kfree(name_buf); + kfree(symlink_buf); + kfree(header_buf); +diff --git a/lib/Makefile +index 7cb65d8..867fd9e 100644 +--- a/lib/Makefile ++++ b/lib/Makefile +@@ -11,7 +11,8 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \ + rbtree.o radix-tree.o dump_stack.o \ + idr.o int_sqrt.o extable.o prio_tree.o \ + sha1.o irq_regs.o reciprocal_div.o argv_split.o \ +- proportions.o prio_heap.o ratelimit.o show_mem.o ++ proportions.o prio_heap.o ratelimit.o show_mem.o \ ++ decompress_inflate.o decompress_bunzip2.o decompress_unlzma.o + + lib-$(CONFIG_MMU) += ioremap.o + lib-$(CONFIG_SMP) += cpumask.o +-- +1.8.1 + |
