blob: ba06aef4aca1311f250caf9bd7aec11a066e4900 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
#include <linux/buffer_head.h>
#include "minix.h"
enum {DEPTH = 3, DIRECT = 7}; /* Only double indirect */
typedef u16 block_t; /* 16 bit, host order */
static inline unsigned long block_to_cpu(block_t n)
{
return n;
}
static inline block_t cpu_to_block(unsigned long n)
{
return n;
}
static inline block_t *i_data(struct inode *inode)
{
return (block_t *)minix_i(inode)->u.i1_data;
}
static int block_to_path(struct inode * inode, long block, int offsets[DEPTH])
{
int n = 0;
if (block < 0) {
printk("minix_bmap: block<0");
} else if (block >= (minix_sb(inode->i_sb)->s_max_size/BLOCK_SIZE)) {
printk("minix_bmap: block>big");
} else if (block < 7) {
offsets[n++] = block;
} else if ((block -= 7) < 512) {
offsets[n++] = 7;
offsets[n++] = block;
} else {
block -= 512;
offsets[n++] = 8;
offsets[n++] = block>>9;
offsets[n++] = block & 511;
}
return n;
}
#include "itree_common.c"
int V1_minix_get_block(struct inode * inode, long block,
struct buffer_head *bh_result, int create)
{
return get_block(inode, block, bh_result, create);
}
void V1_minix_truncate(struct inode * inode)
{
truncate(inode);
}
unsigned V1_minix_blocks(loff_t size)
{
return nblocks(size);
}
|
