file.c
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/*
* 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
*/
printk(KERN_WARNING "EFS: bmap(): block %d >= %ld (filesize %ld)\n",
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) {
printk(KERN_WARNING "EFS: bmap(): block < 0\n");
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
*/
printk(KERN_WARNING "EFS: bmap(): block %d >= %ld (filesize %ld)\n",
block,
inode->i_blocks,
inode->i_size);
#endif
return 0;
}
return efs_map_block(inode, block);
}