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Viewing changes to fs/squashfs/decompressor.c

  • Committer: Bazaar Package Importer
  • Author(s): Paolo Pisati
  • Date: 2011-06-29 15:23:51 UTC
  • mfrom: (26.1.1 natty-proposed)
  • Revision ID: james.westby@ubuntu.com-20110629152351-xs96tm303d95rpbk
Tags: 3.0.0-1200.2
* Rebased against 3.0.0-6.7
* BSP from TI based on 3.0.0

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fs/squashfs/decompressor.c
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 * Squashfs - a compressed read only filesystem for Linux
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 *
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 * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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 * Phillip Lougher <phillip@lougher.demon.co.uk>
 
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 * Phillip Lougher <phillip@squashfs.org.uk>
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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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#include <linux/types.h>
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#include <linux/mutex.h>
 
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#include <linux/slab.h>
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#include <linux/buffer_head.h>
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#include "squashfs_fs.h"
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        return decompressor[i];
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}
 
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void *squashfs_decompressor_init(struct super_block *sb, unsigned short flags)
 
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{
 
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        struct squashfs_sb_info *msblk = sb->s_fs_info;
 
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        void *strm, *buffer = NULL;
 
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        int length = 0;
 
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        /*
 
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         * Read decompressor specific options from file system if present
 
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         */
 
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        if (SQUASHFS_COMP_OPTS(flags)) {
 
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                buffer = kmalloc(PAGE_CACHE_SIZE, GFP_KERNEL);
 
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                if (buffer == NULL)
 
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                        return ERR_PTR(-ENOMEM);
 
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                length = squashfs_read_data(sb, &buffer,
 
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                        sizeof(struct squashfs_super_block), 0, NULL,
 
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                        PAGE_CACHE_SIZE, 1);
 
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                if (length < 0) {
 
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                        strm = ERR_PTR(length);
 
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                        goto finished;
 
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                }
 
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        }
 
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        strm = msblk->decompressor->init(msblk, buffer, length);
 
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finished:
 
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        kfree(buffer);
 
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        return strm;
 
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}