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, 0 insertions, 585 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 deleted file mode 100644 index 1fca71b..0000000 --- a/meta-aspeed/recipes-kernel/linux/files/patch-2.6.28.9/0002-bzip2-lzma-config-and-initramfs-support-for-bzip2-lz.patch +++ /dev/null @@ -1,585 +0,0 @@ -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 - |
