blob: 5db20129681edacc1e8686c58aecdf634b635c61 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 <linux/efs_fs.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 printk(KERN_WARNING "EFS: bmap(): block %d >= %ld (filesize %ld)\n",
26 block,
27 inode->i_blocks,
28 inode->i_size);
29#endif
30 return 0;
31 }
32 phys = efs_map_block(inode, iblock);
33 if (phys)
34 map_bh(bh_result, inode->i_sb, phys);
35 return 0;
36}
37
38int efs_bmap(struct inode *inode, efs_block_t block) {
39
40 if (block < 0) {
41 printk(KERN_WARNING "EFS: bmap(): block < 0\n");
42 return 0;
43 }
44
45 /* are we about to read past the end of a file ? */
46 if (!(block < inode->i_blocks)) {
47#ifdef DEBUG
48 /*
49 * i have no idea why this happens as often as it does
50 */
51 printk(KERN_WARNING "EFS: bmap(): block %d >= %ld (filesize %ld)\n",
52 block,
53 inode->i_blocks,
54 inode->i_size);
55#endif
56 return 0;
57 }
58
59 return efs_map_block(inode, block);
60}