108 lines
2.8 KiB
Diff
108 lines
2.8 KiB
Diff
--- a/fs/squashfs/inode.c
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+++ b/fs/squashfs/inode.c
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@@ -4,6 +4,9 @@
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* Copyright (c) 2002, 2003, 2004, 2005, 2006
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* Phillip Lougher <phillip@lougher.org.uk>
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*
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+ * LZMA decompressor support added by Oleg I. Vdovikin
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+ * Copyright (c) 2005 Oleg I.Vdovikin <oleg@cs.msu.su>
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+ *
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2,
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@@ -21,6 +24,7 @@
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* inode.c
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*/
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+#define SQUASHFS_LZMA
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#include <linux/types.h>
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#include <linux/squashfs_fs.h>
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#include <linux/module.h>
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@@ -44,6 +48,19 @@
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#include "squashfs.h"
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+#ifdef SQUASHFS_LZMA
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+#include <linux/LzmaDecode.h>
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+
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+/* default LZMA settings, should be in sync with mksquashfs */
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+#define LZMA_LC 3
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+#define LZMA_LP 0
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+#define LZMA_PB 2
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+
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+#define LZMA_WORKSPACE_SIZE ((LZMA_BASE_SIZE + \
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+ (LZMA_LIT_SIZE << (LZMA_LC + LZMA_LP))) * sizeof(CProb))
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+
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+#endif
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+
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static void squashfs_put_super(struct super_block *);
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static int squashfs_statfs(struct dentry *, struct kstatfs *);
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static int squashfs_symlink_readpage(struct file *file, struct page *page);
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@@ -64,7 +81,11 @@ static int squashfs_get_sb(struct file_s
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const char *, void *, struct vfsmount *);
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+#ifdef SQUASHFS_LZMA
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+static unsigned char lzma_workspace[LZMA_WORKSPACE_SIZE];
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+#else
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static z_stream stream;
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+#endif
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static struct file_system_type squashfs_fs_type = {
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.owner = THIS_MODULE,
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@@ -249,6 +270,15 @@ SQSH_EXTERN unsigned int squashfs_read_d
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if (compressed) {
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int zlib_err;
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+#ifdef SQUASHFS_LZMA
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+ if ((zlib_err = LzmaDecode(lzma_workspace,
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+ LZMA_WORKSPACE_SIZE, LZMA_LC, LZMA_LP, LZMA_PB,
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+ c_buffer, c_byte, buffer, msblk->read_size, &bytes)) != LZMA_RESULT_OK)
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+ {
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+ ERROR("lzma returned unexpected result 0x%x\n", zlib_err);
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+ bytes = 0;
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+ }
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+#else
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stream.next_in = c_buffer;
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stream.avail_in = c_byte;
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stream.next_out = buffer;
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@@ -263,7 +293,7 @@ SQSH_EXTERN unsigned int squashfs_read_d
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bytes = 0;
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} else
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bytes = stream.total_out;
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-
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+#endif
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up(&msblk->read_data_mutex);
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}
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@@ -2045,15 +2075,19 @@ static int __init init_squashfs_fs(void)
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printk(KERN_INFO "squashfs: version 3.0 (2006/03/15) "
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"Phillip Lougher\n");
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+#ifndef SQUASHFS_LZMA
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if (!(stream.workspace = vmalloc(zlib_inflate_workspacesize()))) {
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ERROR("Failed to allocate zlib workspace\n");
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destroy_inodecache();
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err = -ENOMEM;
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goto out;
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}
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+#endif
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if ((err = register_filesystem(&squashfs_fs_type))) {
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+#ifndef SQUASHFS_LZMA
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vfree(stream.workspace);
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+#endif
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destroy_inodecache();
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}
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@@ -2064,7 +2098,9 @@ out:
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static void __exit exit_squashfs_fs(void)
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{
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+#ifndef SQUASHFS_LZMA
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vfree(stream.workspace);
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+#endif
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unregister_filesystem(&squashfs_fs_type);
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destroy_inodecache();
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}
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