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
  12 int 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
  36 int 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 }