1 | // SPDX-License-Identifier: GPL-2.0 |
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> |
11 | #include "efs.h" |
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 | */ |
26 | pr_warn("%s(): block %d >= %ld (filesize %ld)\n" , |
27 | __func__, block, inode->i_blocks, inode->i_size); |
28 | #endif |
29 | return 0; |
30 | } |
31 | phys = efs_map_block(inode, iblock); |
32 | if (phys) |
33 | map_bh(bh: bh_result, sb: inode->i_sb, block: phys); |
34 | return 0; |
35 | } |
36 | |
37 | int efs_bmap(struct inode *inode, efs_block_t block) { |
38 | |
39 | if (block < 0) { |
40 | pr_warn("%s(): block < 0\n" , __func__); |
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 | */ |
50 | pr_warn("%s(): block %d >= %ld (filesize %ld)\n" , |
51 | __func__, block, inode->i_blocks, inode->i_size); |
52 | #endif |
53 | return 0; |
54 | } |
55 | |
56 | return efs_map_block(inode, block); |
57 | } |
58 | |