limit minixfs printks on corrupted dir i_size
[linux-3.10.git] / fs / minix / itree_v2.c
1 #include <linux/buffer_head.h>
2 #include "minix.h"
3
4 enum {DIRECT = 7, DEPTH = 4};   /* Have triple indirect */
5
6 typedef u32 block_t;    /* 32 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.i2_data;
21 }
22
23 static int block_to_path(struct inode * inode, long block, int offsets[DEPTH])
24 {
25         int n = 0;
26         char b[BDEVNAME_SIZE];
27         struct super_block *sb = inode->i_sb;
28
29         if (block < 0) {
30                 printk("MINIX-fs: block_to_path: block %ld < 0 on dev %s\n",
31                         block, bdevname(sb->s_bdev, b));
32         } else if (block >= (minix_sb(inode->i_sb)->s_max_size/sb->s_blocksize)) {
33                 if (printk_ratelimit())
34                         printk("MINIX-fs: block_to_path: "
35                                "block %ld too big on dev %s\n",
36                                 block, bdevname(sb->s_bdev, b));
37         } else if (block < 7) {
38                 offsets[n++] = block;
39         } else if ((block -= 7) < 256) {
40                 offsets[n++] = 7;
41                 offsets[n++] = block;
42         } else if ((block -= 256) < 256*256) {
43                 offsets[n++] = 8;
44                 offsets[n++] = block>>8;
45                 offsets[n++] = block & 255;
46         } else {
47                 block -= 256*256;
48                 offsets[n++] = 9;
49                 offsets[n++] = block>>16;
50                 offsets[n++] = (block>>8) & 255;
51                 offsets[n++] = block & 255;
52         }
53         return n;
54 }
55
56 #include "itree_common.c"
57
58 int V2_minix_get_block(struct inode * inode, long block,
59                         struct buffer_head *bh_result, int create)
60 {
61         return get_block(inode, block, bh_result, create);
62 }
63
64 void V2_minix_truncate(struct inode * inode)
65 {
66         truncate(inode);
67 }
68
69 unsigned V2_minix_blocks(loff_t size, struct super_block *sb)
70 {
71         return nblocks(size, sb);
72 }