projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | #include <linux/buffer_head.h> |
| 5a0e3ad6 | 2 | #include <linux/slab.h> |
| 1da177e4 LT |
3 | #include "minix.h" |
| 4 | ||
| 5 | enum {DEPTH = 3, DIRECT = 7}; /* Only double indirect */ | |
| 6 | ||
| 7 | typedef u16 block_t; /* 16 bit, host order */ | |
| 8 | ||
| 9 | static inline unsigned long block_to_cpu(block_t n) | |
| 10 | { | |
| 11 | return n; | |
| 12 | } | |
| 13 | ||
| 14 | static inline block_t cpu_to_block(unsigned long n) | |
| 15 | { | |
| 16 | return n; | |
| 17 | } | |
| 18 | ||
| 19 | static inline block_t *i_data(struct inode *inode) | |
| 20 | { | |
| 21 | return (block_t *)minix_i(inode)->u.i1_data; | |
| 22 | } | |
| 23 | ||
| 24 | static int block_to_path(struct inode * inode, long block, int offsets[DEPTH]) | |
| 25 | { | |
| 26 | int n = 0; | |
| 27 | ||
| 28 | if (block < 0) { | |
| a1c6f057 DM |
29 | printk("MINIX-fs: block_to_path: block %ld < 0 on dev %pg\n", |
| 30 | block, inode->i_sb->s_bdev); | |
| 1da177e4 | 31 | } else if (block >= (minix_sb(inode->i_sb)->s_max_size/BLOCK_SIZE)) { |
| f44ec6f3 ES |
32 | if (printk_ratelimit()) |
| 33 | printk("MINIX-fs: block_to_path: " | |
| a1c6f057 DM |
34 | "block %ld too big on dev %pg\n", |
| 35 | block, inode->i_sb->s_bdev); | |
| 1da177e4 LT |
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 | ||
| 52 | int 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 | ||
| 58 | void V1_minix_truncate(struct inode * inode) | |
| 59 | { | |
| 60 | truncate(inode); | |
| 61 | } | |
| 62 | ||
| 939b00df | 63 | unsigned V1_minix_blocks(loff_t size, struct super_block *sb) |
| 1da177e4 | 64 | { |
| 939b00df | 65 | return nblocks(size, sb); |
| 1da177e4 | 66 | } |