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/*

 * inode.c

 *

 * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com>

 */

#include <linux/fs.h>

#include "befs.h"

#include "inode.h"

#include "endian.h"

/*

        Validates the correctness of the befs inode

        Returns BEFS_OK if the inode should be used, otherwise

        returns BEFS_BAD_INODE

*/

int

befs_check_inode(struct super_block *sb, befs_inode * raw_inode,

                 befs_blocknr_t inode)

{

        u32 magic1 = fs32_to_cpu(sb, raw_inode->magic1);

        befs_inode_addr ino_num = fsrun_to_cpu(sb, raw_inode->inode_num);

        u32 flags = fs32_to_cpu(sb, raw_inode->flags);

        /* check magic header. */

        if (magic1 != BEFS_INODE_MAGIC1) {

                befs_error(sb,

                           "Inode has a bad magic header - inode = %lu", inode);

                return BEFS_BAD_INODE;

        }

        /*

         * Sanity check2: inodes store their own block address. Check it.

         */

        if (inode != iaddr2blockno(sb, &ino_num)) {

                befs_error(sb, "inode blocknr field disagrees with vfs "

                           "VFS: %lu, Inode %lu",

                           inode, iaddr2blockno(sb, &ino_num));

                return BEFS_BAD_INODE;

        }

        /*

         * check flag

         */

        if (!(flags & BEFS_INODE_IN_USE)) {

                befs_error(sb, "inode is not used - inode = %lu", inode);

                return BEFS_BAD_INODE;

        }

        return BEFS_OK;

}