inode.c

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/*
 * inode.c
 * 
 * Copyright (C) 2001 Will Dyson <[email protected]>
 */

#include <linux/fs.h>

#include "befs.h"
#include "inode.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;
}