LXR linux/fs/efs/file.c

   1/*
   2 * file.c
   3 *
   4 * Copyright (c) 1999 Al Smith
   5 *
   6 * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
   7 */
   8
   9#include <linux/buffer_head.h>
  10#include "efs.h"
  11
  12int efs_get_block(struct inode *inode, sector_t iblock,
  13                  struct buffer_head *bh_result, int create)
  14{
  15        int error = -EROFS;
  16        long phys;
  17
  18        if (create)
  19                return error;
  20        if (iblock >= inode->i_blocks) {
  21#ifdef DEBUG
  22                /*
  23                 * i have no idea why this happens as often as it does
  24                 */
  25                pr_warn("%s(): block %d >= %ld (filesize %ld)\n",
  26                        __func__, block, inode->i_blocks, inode->i_size);
  27#endif
  28                return 0;
  29        }
  30        phys = efs_map_block(inode, iblock);
  31        if (phys)
  32                map_bh(bh_result, inode->i_sb, phys);
  33        return 0;
  34}
  35
  36int efs_bmap(struct inode *inode, efs_block_t block) {
  37
  38        if (block < 0) {
  39                pr_warn("%s(): block < 0\n", __func__);
  40                return 0;
  41        }
  42
  43        /* are we about to read past the end of a file ? */
  44        if (!(block < inode->i_blocks)) {
  45#ifdef DEBUG
  46                /*
  47                 * i have no idea why this happens as often as it does
  48                 */
  49                pr_warn("%s(): block %d >= %ld (filesize %ld)\n",
  50                        __func__, block, inode->i_blocks, inode->i_size);
  51#endif
  52                return 0;
  53        }
  54
  55        return efs_map_block(inode, block);
  56}
  57