/*
   * inode.c
   * 
   * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com>
   */
  
  #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;
  }