tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
28 if (block < 0) {
29 printk("MINIX-fs: block_to_path: block %ld < 0 on dev %pg\n",
30 block, inode->i_sb->s_bdev);
31 } else if (block >= (minix_sb(inode->i_sb)->s_max_size/BLOCK_SIZE)) {
32 if (printk_ratelimit())
33 printk("MINIX-fs: block_to_path: "
34 "block %ld too big on dev %pg\n",
35 block, inode->i_sb->s_bdev);
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
52int 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
58void V1_minix_truncate(struct inode * inode)
59{
60 truncate(inode);
61}
62
63unsigned V1_minix_blocks(loff_t size, struct super_block *sb)
64{
65 return nblocks(size, sb);
66}