diff options
Diffstat (limited to 'target/linux/generic/patches-2.6.33/006-squashfs_add_lzma.patch')
| -rw-r--r-- | target/linux/generic/patches-2.6.33/006-squashfs_add_lzma.patch | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/target/linux/generic/patches-2.6.33/006-squashfs_add_lzma.patch b/target/linux/generic/patches-2.6.33/006-squashfs_add_lzma.patch deleted file mode 100644 index 9fd57970f2..0000000000 --- a/target/linux/generic/patches-2.6.33/006-squashfs_add_lzma.patch +++ /dev/null @@ -1,216 +0,0 @@ -From f49e1efdd179d54e814ff2a8e8f469496583062c Mon Sep 17 00:00:00 2001 -From: Phillip Lougher <phillip@lougher.demon.co.uk> -Date: Tue, 20 Oct 2009 10:54:36 +0100 -Subject: [PATCH] Squashfs: add LZMA compression - -Add support for LZMA compressed filesystems. This is an initial -implementation. - -Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk> ---- - fs/squashfs/Kconfig | 5 ++ - fs/squashfs/Makefile | 1 + - fs/squashfs/decompressor.c | 4 + - fs/squashfs/lzma_wrapper.c | 151 ++++++++++++++++++++++++++++++++++++++++++++ - fs/squashfs/squashfs.h | 3 + - 5 files changed, 164 insertions(+), 0 deletions(-) - create mode 100644 fs/squashfs/lzma_wrapper.c - ---- a/fs/squashfs/Kconfig -+++ b/fs/squashfs/Kconfig -@@ -26,6 +26,11 @@ config SQUASHFS - - If unsure, say N. - -+config SQUASHFS_LZMA -+ bool "Include support for LZMA compressed file systems" -+ depends on SQUASHFS -+ select DECOMPRESS_LZMA -+ - config SQUASHFS_EMBEDDED - - bool "Additional option for memory-constrained systems" ---- a/fs/squashfs/Makefile -+++ b/fs/squashfs/Makefile -@@ -5,3 +5,4 @@ - obj-$(CONFIG_SQUASHFS) += squashfs.o - squashfs-y += block.o cache.o dir.o export.o file.o fragment.o id.o inode.o - squashfs-y += namei.o super.o symlink.o zlib_wrapper.o decompressor.o -+squashfs-$(CONFIG_SQUASHFS_LZMA) += lzma_wrapper.o ---- a/fs/squashfs/decompressor.c -+++ b/fs/squashfs/decompressor.c -@@ -50,7 +50,11 @@ static const struct squashfs_decompresso - - static const struct squashfs_decompressor *decompressor[] = { - &squashfs_zlib_comp_ops, -+#ifdef CONFIG_SQUASHFS_LZMA -+ &squashfs_lzma_comp_ops, -+#else - &squashfs_lzma_unsupported_comp_ops, -+#endif - &squashfs_lzo_unsupported_comp_ops, - &squashfs_unknown_comp_ops - }; ---- /dev/null -+++ b/fs/squashfs/lzma_wrapper.c -@@ -0,0 +1,151 @@ -+/* -+ * Squashfs - a compressed read only filesystem for Linux -+ * -+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 -+ * Phillip Lougher <phillip@lougher.demon.co.uk> -+ * -+ * 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. -+ * -+ * lzma_wrapper.c -+ */ -+ -+#include <asm/unaligned.h> -+#include <linux/buffer_head.h> -+#include <linux/mutex.h> -+#include <linux/vmalloc.h> -+#include <linux/decompress/unlzma.h> -+ -+#include "squashfs_fs.h" -+#include "squashfs_fs_sb.h" -+#include "squashfs_fs_i.h" -+#include "squashfs.h" -+#include "decompressor.h" -+ -+struct squashfs_lzma { -+ void *input; -+ void *output; -+}; -+ -+/* decompress_unlzma.c is currently non re-entrant... */ -+DEFINE_MUTEX(lzma_mutex); -+ -+/* decompress_unlzma.c doesn't provide any context in its callbacks... */ -+static int lzma_error; -+ -+static void error(char *m) -+{ -+ ERROR("unlzma error: %s\n", m); -+ lzma_error = 1; -+} -+ -+ -+static void *lzma_init(struct squashfs_sb_info *msblk) -+{ -+ struct squashfs_lzma *stream = kzalloc(sizeof(*stream), GFP_KERNEL); -+ if (stream == NULL) -+ goto failed; -+ stream->input = vmalloc(msblk->block_size); -+ if (stream->input == NULL) -+ goto failed; -+ stream->output = vmalloc(msblk->block_size); -+ if (stream->output == NULL) -+ goto failed2; -+ -+ return stream; -+ -+failed2: -+ vfree(stream->input); -+failed: -+ ERROR("failed to allocate lzma workspace\n"); -+ kfree(stream); -+ return NULL; -+} -+ -+ -+static void lzma_free(void *strm) -+{ -+ struct squashfs_lzma *stream = strm; -+ -+ if (stream) { -+ vfree(stream->input); -+ vfree(stream->output); -+ } -+ kfree(stream); -+} -+ -+ -+static int lzma_uncompress(struct squashfs_sb_info *msblk, void **buffer, -+ struct buffer_head **bh, int b, int offset, int length, int srclength, -+ int pages) -+{ -+ struct squashfs_lzma *stream = msblk->stream; -+ void *buff = stream->input; -+ int avail, i, bytes = length, res; -+ -+ mutex_lock(&lzma_mutex); -+ -+ for (i = 0; i < b; i++) { -+ wait_on_buffer(bh[i]); -+ if (!buffer_uptodate(bh[i])) -+ goto block_release; -+ -+ avail = min(bytes, msblk->devblksize - offset); -+ memcpy(buff, bh[i]->b_data + offset, avail); -+ buff += avail; -+ bytes -= avail; -+ offset = 0; -+ put_bh(bh[i]); -+ } -+ -+ lzma_error = 0; -+ res = unlzma(stream->input, length, NULL, NULL, stream->output, NULL, -+ error); -+ if (res || lzma_error) -+ goto failed; -+ -+ /* uncompressed size is stored in the LZMA header (5 byte offset) */ -+ res = bytes = get_unaligned_le32(stream->input + 5); -+ for (i = 0, buff = stream->output; bytes && i < pages; i++) { -+ avail = min_t(int, bytes, PAGE_CACHE_SIZE); -+ memcpy(buffer[i], buff, avail); -+ buff += avail; -+ bytes -= avail; -+ } -+ if (bytes) -+ goto failed; -+ -+ mutex_unlock(&lzma_mutex); -+ return res; -+ -+block_release: -+ for (; i < b; i++) -+ put_bh(bh[i]); -+ -+failed: -+ mutex_unlock(&lzma_mutex); -+ -+ ERROR("lzma decompression failed, data probably corrupt\n"); -+ return -EIO; -+} -+ -+const struct squashfs_decompressor squashfs_lzma_comp_ops = { -+ .init = lzma_init, -+ .free = lzma_free, -+ .decompress = lzma_uncompress, -+ .id = LZMA_COMPRESSION, -+ .name = "lzma", -+ .supported = 1 -+}; -+ ---- a/fs/squashfs/squashfs.h -+++ b/fs/squashfs/squashfs.h -@@ -94,3 +94,6 @@ extern const struct address_space_operat - - /* zlib_wrapper.c */ - extern const struct squashfs_decompressor squashfs_zlib_comp_ops; -+ -+/* lzma wrapper.c */ -+extern const struct squashfs_decompressor squashfs_lzma_comp_ops; |