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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * file.c | |
4 | * | |
5 | * Copyright (c) 1999 Al Smith | |
6 | * | |
7 | * Portions derived from work (c) 1995,1996 Christian Vogelgsang. | |
8 | */ | |
9 | ||
10 | #include <linux/buffer_head.h> | |
45254b4f | 11 | #include "efs.h" |
1da177e4 LT |
12 | |
13 | int efs_get_block(struct inode *inode, sector_t iblock, | |
14 | struct buffer_head *bh_result, int create) | |
15 | { | |
16 | int error = -EROFS; | |
17 | long phys; | |
18 | ||
19 | if (create) | |
20 | return error; | |
21 | if (iblock >= inode->i_blocks) { | |
22 | #ifdef DEBUG | |
23 | /* | |
24 | * i have no idea why this happens as often as it does | |
25 | */ | |
f403d1db FF |
26 | pr_warn("%s(): block %d >= %ld (filesize %ld)\n", |
27 | __func__, block, inode->i_blocks, inode->i_size); | |
1da177e4 LT |
28 | #endif |
29 | return 0; | |
30 | } | |
31 | phys = efs_map_block(inode, iblock); | |
32 | if (phys) | |
33 | map_bh(bh_result, inode->i_sb, phys); | |
34 | return 0; | |
35 | } | |
36 | ||
37 | int efs_bmap(struct inode *inode, efs_block_t block) { | |
38 | ||
39 | if (block < 0) { | |
f403d1db | 40 | pr_warn("%s(): block < 0\n", __func__); |
1da177e4 LT |
41 | return 0; |
42 | } | |
43 | ||
44 | /* are we about to read past the end of a file ? */ | |
45 | if (!(block < inode->i_blocks)) { | |
46 | #ifdef DEBUG | |
47 | /* | |
48 | * i have no idea why this happens as often as it does | |
49 | */ | |
f403d1db FF |
50 | pr_warn("%s(): block %d >= %ld (filesize %ld)\n", |
51 | __func__, block, inode->i_blocks, inode->i_size); | |
1da177e4 LT |
52 | #endif |
53 | return 0; | |
54 | } | |
55 | ||
56 | return efs_map_block(inode, block); | |
57 | } |