1 /* 2 * file.c 3 * 4 * Copyright (c) 1999 Al Smith 5 * 6 * Portions derived from work (c) 1995,1996 Christian Vogelgsang. 7 */ 8 9 #include <linux/buffer_head.h> 10 #include "efs.h" 11 12 int efs_get_block(struct inode *inode, sector_t iblock, 13 struct buffer_head *bh_result, int create) 14 { 15 int error = -EROFS; 16 long phys; 17 18 if (create) 19 return error; 20 if (iblock >= inode->i_blocks) { 21 #ifdef DEBUG 22 /* 23 * i have no idea why this happens as often as it does 24 */ 25 printk(KERN_WARNING "EFS: bmap(): block %d >= %ld (filesize %ld)\n", 26 block, 27 inode->i_blocks, 28 inode->i_size); 29 #endif 30 return 0; 31 } 32 phys = efs_map_block(inode, iblock); 33 if (phys) 34 map_bh(bh_result, inode->i_sb, phys); 35 return 0; 36 } 37 38 int efs_bmap(struct inode *inode, efs_block_t block) { 39 40 if (block < 0) { 41 printk(KERN_WARNING "EFS: bmap(): block < 0\n"); 42 return 0; 43 } 44 45 /* are we about to read past the end of a file ? */ 46 if (!(block < inode->i_blocks)) { 47 #ifdef DEBUG 48 /* 49 * i have no idea why this happens as often as it does 50 */ 51 printk(KERN_WARNING "EFS: bmap(): block %d >= %ld (filesize %ld)\n", 52 block, 53 inode->i_blocks, 54 inode->i_size); 55 #endif 56 return 0; 57 } 58 59 return efs_map_block(inode, block); 60 } 61