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 char b[BDEVNAME_SIZE]; 28 29 if (block < 0) { 30 printk("MINIX-fs: block_to_path: block %ld < 0 on dev %s\n", 31 block, bdevname(inode->i_sb->s_bdev, b)); 32 } else if (block >= (minix_sb(inode->i_sb)->s_max_size/BLOCK_SIZE)) { 33 if (printk_ratelimit()) 34 printk("MINIX-fs: block_to_path: " 35 "block %ld too big on dev %s\n", 36 block, bdevname(inode->i_sb->s_bdev, b)); 37 } else if (block < 7) { 38 offsets[n++] = block; 39 } else if ((block -= 7) < 512) { 40 offsets[n++] = 7; 41 offsets[n++] = block; 42 } else { 43 block -= 512; 44 offsets[n++] = 8; 45 offsets[n++] = block>>9; 46 offsets[n++] = block & 511; 47 } 48 return n; 49} 50 51#include "itree_common.c" 52 53int V1_minix_get_block(struct inode * inode, long block, 54 struct buffer_head *bh_result, int create) 55{ 56 return get_block(inode, block, bh_result, create); 57} 58 59void V1_minix_truncate(struct inode * inode) 60{ 61 truncate(inode); 62} 63 64unsigned V1_minix_blocks(loff_t size, struct super_block *sb) 65{ 66 return nblocks(size, sb); 67} 68