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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 | 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 | |
38 | int 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 | } |
61 |
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od-2011-09-04
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v2.6.34-rc5
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