1#include <linux/buffer_head.h>
2#include <linux/slab.h>
3#include "minix.h"
4
5enum {DEPTH = 3, DIRECT = 7};	/* Only double indirect */
6
7typedef u16 block_t;	/* 16 bit, host order */
8
9static inline unsigned long block_to_cpu(block_t n)
10{
11	return n;
12}
13
14static inline block_t cpu_to_block(unsigned long n)
15{
16	return n;
17}
18
19static inline block_t *i_data(struct inode *inode)
20{
21	return (block_t *)minix_i(inode)->u.i1_data;
22}
23
24static int block_to_path(struct inode * inode, long block, int offsets[DEPTH])
25{
26	int n = 0;
27	char b[BDEVNAME_SIZE];
28
29	if (block < 0) {
30		printk("MINIX-fs: block_to_path: block %ld < 0 on dev %s\n",
31			block, bdevname(inode->i_sb->s_bdev, b));
32	} else if (block >= (minix_sb(inode->i_sb)->s_max_size/BLOCK_SIZE)) {
33		if (printk_ratelimit())
34			printk("MINIX-fs: block_to_path: "
35			       "block %ld too big on dev %s\n",
36				block, bdevname(inode->i_sb->s_bdev, b));
37	} else if (block < 7) {
38		offsets[n++] = block;
39	} else if ((block -= 7) < 512) {
40		offsets[n++] = 7;
41		offsets[n++] = block;
42	} else {
43		block -= 512;
44		offsets[n++] = 8;
45		offsets[n++] = block>>9;
46		offsets[n++] = block & 511;
47	}
48	return n;
49}
50
51#include "itree_common.c"
52
53int V1_minix_get_block(struct inode * inode, long block,
54			struct buffer_head *bh_result, int create)
55{
56	return get_block(inode, block, bh_result, create);
57}
58
59void V1_minix_truncate(struct inode * inode)
60{
61	truncate(inode);
62}
63
64unsigned V1_minix_blocks(loff_t size, struct super_block *sb)
65{
66	return nblocks(size, sb);
67}
68