57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
|
/*
|
||
|
|
* 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)\n",
|
||
|
|
__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\n", __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)\n",
|
||
|
|
__func__, block, inode->i_blocks, inode->i_size);
|
||
|
|
#endif
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
return efs_map_block(inode, block);
|
||
|
|
}
|