]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - fs/minix/itree_v2.c
1 #include <linux/buffer_head.h>
4 enum {DIRECT
= 7, DEPTH
= 4}; /* Have triple indirect */
6 typedef u32 block_t
; /* 32 bit, host order */
8 static inline unsigned long block_to_cpu(block_t n
)
13 static inline block_t
cpu_to_block(unsigned long n
)
18 static inline block_t
*i_data(struct inode
*inode
)
20 return (block_t
*)minix_i(inode
)->u
.i2_data
;
23 static int block_to_path(struct inode
* inode
, long block
, int offsets
[DEPTH
])
26 char b
[BDEVNAME_SIZE
];
27 struct super_block
*sb
= inode
->i_sb
;
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) {
39 } else if ((block
-= 7) < 256) {
42 } else if ((block
-= 256) < 256*256) {
44 offsets
[n
++] = block
>>8;
45 offsets
[n
++] = block
& 255;
49 offsets
[n
++] = block
>>16;
50 offsets
[n
++] = (block
>>8) & 255;
51 offsets
[n
++] = block
& 255;
56 #include "itree_common.c"
58 int V2_minix_get_block(struct inode
* inode
, long block
,
59 struct buffer_head
*bh_result
, int create
)
61 return get_block(inode
, block
, bh_result
, create
);
64 void V2_minix_truncate(struct inode
* inode
)
69 unsigned V2_minix_blocks(loff_t size
, struct super_block
*sb
)
71 return nblocks(size
, sb
);