Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/buffer_head.h> |
2 | #include "minix.h" | |
3 | ||
4 | enum {DEPTH = 3, DIRECT = 7}; /* Only double indirect */ | |
5 | ||
6 | typedef u16 block_t; /* 16 bit, host order */ | |
7 | ||
8 | static inline unsigned long block_to_cpu(block_t n) | |
9 | { | |
10 | return n; | |
11 | } | |
12 | ||
13 | static inline block_t cpu_to_block(unsigned long n) | |
14 | { | |
15 | return n; | |
16 | } | |
17 | ||
18 | static inline block_t *i_data(struct inode *inode) | |
19 | { | |
20 | return (block_t *)minix_i(inode)->u.i1_data; | |
21 | } | |
22 | ||
23 | static int block_to_path(struct inode * inode, long block, int offsets[DEPTH]) | |
24 | { | |
25 | int n = 0; | |
f44ec6f3 | 26 | char b[BDEVNAME_SIZE]; |
1da177e4 LT |
27 | |
28 | if (block < 0) { | |
f44ec6f3 ES |
29 | printk("MINIX-fs: block_to_path: block %ld < 0 on dev %s\n", |
30 | block, bdevname(inode->i_sb->s_bdev, b)); | |
1da177e4 | 31 | } else if (block >= (minix_sb(inode->i_sb)->s_max_size/BLOCK_SIZE)) { |
f44ec6f3 ES |
32 | if (printk_ratelimit()) |
33 | printk("MINIX-fs: block_to_path: " | |
34 | "block %ld too big on dev %s\n", | |
35 | block, bdevname(inode->i_sb->s_bdev, b)); | |
1da177e4 LT |
36 | } else if (block < 7) { |
37 | offsets[n++] = block; | |
38 | } else if ((block -= 7) < 512) { | |
39 | offsets[n++] = 7; | |
40 | offsets[n++] = block; | |
41 | } else { | |
42 | block -= 512; | |
43 | offsets[n++] = 8; | |
44 | offsets[n++] = block>>9; | |
45 | offsets[n++] = block & 511; | |
46 | } | |
47 | return n; | |
48 | } | |
49 | ||
50 | #include "itree_common.c" | |
51 | ||
52 | int V1_minix_get_block(struct inode * inode, long block, | |
53 | struct buffer_head *bh_result, int create) | |
54 | { | |
55 | return get_block(inode, block, bh_result, create); | |
56 | } | |
57 | ||
58 | void V1_minix_truncate(struct inode * inode) | |
59 | { | |
60 | truncate(inode); | |
61 | } | |
62 | ||
939b00df | 63 | unsigned V1_minix_blocks(loff_t size, struct super_block *sb) |
1da177e4 | 64 | { |
939b00df | 65 | return nblocks(size, sb); |
1da177e4 | 66 | } |