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
;
24 #define INDIRCOUNT(sb) (1 << ((sb)->s_blocksize_bits - 2))
26 static int block_to_path(struct inode
* inode
, long block
, int offsets
[DEPTH
])
29 char b
[BDEVNAME_SIZE
];
30 struct super_block
*sb
= inode
->i_sb
;
33 printk("MINIX-fs: block_to_path: block %ld < 0 on dev %s\n",
34 block
, bdevname(sb
->s_bdev
, b
));
35 } else if (block
>= (minix_sb(inode
->i_sb
)->s_max_size
/sb
->s_blocksize
)) {
36 if (printk_ratelimit())
37 printk("MINIX-fs: block_to_path: "
38 "block %ld too big on dev %s\n",
39 block
, bdevname(sb
->s_bdev
, b
));
40 } else if (block
< DIRCOUNT
) {
42 } else if ((block
-= DIRCOUNT
) < INDIRCOUNT(sb
)) {
43 offsets
[n
++] = DIRCOUNT
;
45 } else if ((block
-= INDIRCOUNT(sb
)) < INDIRCOUNT(sb
) * INDIRCOUNT(sb
)) {
46 offsets
[n
++] = DIRCOUNT
+ 1;
47 offsets
[n
++] = block
/ INDIRCOUNT(sb
);
48 offsets
[n
++] = block
% INDIRCOUNT(sb
);
50 block
-= INDIRCOUNT(sb
) * INDIRCOUNT(sb
);
51 offsets
[n
++] = DIRCOUNT
+ 2;
52 offsets
[n
++] = (block
/ INDIRCOUNT(sb
)) / INDIRCOUNT(sb
);
53 offsets
[n
++] = (block
/ INDIRCOUNT(sb
)) % INDIRCOUNT(sb
);
54 offsets
[n
++] = block
% INDIRCOUNT(sb
);
59 #include "itree_common.c"
61 int V2_minix_get_block(struct inode
* inode
, long block
,
62 struct buffer_head
*bh_result
, int create
)
64 return get_block(inode
, block
, bh_result
, create
);
67 void V2_minix_truncate(struct inode
* inode
)
72 unsigned V2_minix_blocks(loff_t size
, struct super_block
*sb
)
74 return nblocks(size
, sb
);
This page took 0.03108 seconds and 5 git commands to generate.