summaryrefslogblamecommitdiff
path: root/fs/efs/file.c
blob: 1ccb364ffa63b2927c9a838008b4abb611f71e55 (plain) (tree) 
1da177e4c3f4









45254b4fb2ae ^

1da177e4c3f4


















































1
2
3
4
5
6
7
8
9

10

11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60









                                                                 
                

















































                                                                                    
/*
 * 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);
}