// SPDX-License-Identifier: GPL-2.0

  /*
   * file.c
   *
   * Copyright (c) 1999 Al Smith
   *
   * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
   */
  
  #include <linux/buffer_head.h>

  #include "efs.h"

  
  int efs_get_block(struct inode *inode, sector_t iblock,
  		  struct buffer_head *bh_result, int create)
  {
  	int error = -EROFS;
  	long phys;
  
  	if (create)
  		return error;
  	if (iblock >= inode->i_blocks) {
  #ifdef DEBUG
  		/*
  		 * i have no idea why this happens as often as it does
  		 */

  		pr_warn("%s(): block %d >= %ld (filesize %ld)
  ",
  			__func__, block, inode->i_blocks, inode->i_size);

  #endif
  		return 0;
  	}
  	phys = efs_map_block(inode, iblock);
  	if (phys)
  		map_bh(bh_result, inode->i_sb, phys);
  	return 0;
  }
  
  int efs_bmap(struct inode *inode, efs_block_t block) {
  
  	if (block < 0) {

  		pr_warn("%s(): block < 0
  ", __func__);

  		return 0;
  	}
  
  	/* are we about to read past the end of a file ? */
  	if (!(block < inode->i_blocks)) {
  #ifdef DEBUG
  		/*
  		 * i have no idea why this happens as often as it does
  		 */

  		pr_warn("%s(): block %d >= %ld (filesize %ld)
  ",
  			__func__, block, inode->i_blocks, inode->i_size);

  #endif
  		return 0;
  	}
  
  	return efs_map_block(inode, block);
  }