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