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 pr_warn("%s(): block %d >= %ld (filesize %ld)\n", 26 __func__, block, inode->i_blocks, inode->i_size); 27 #endif 28 return 0; 29 } 30 phys = efs_map_block(inode, iblock); 31 if (phys) 32 map_bh(bh_result, inode->i_sb, phys); 33 return 0; 34 } 35 36 int efs_bmap(struct inode *inode, efs_block_t block) { 37 38 if (block < 0) { 39 pr_warn("%s(): block < 0\n", __func__); 40 return 0; 41 } 42 43 /* are we about to read past the end of a file ? */ 44 if (!(block < inode->i_blocks)) { 45 #ifdef DEBUG 46 /* 47 * i have no idea why this happens as often as it does 48 */ 49 pr_warn("%s(): block %d >= %ld (filesize %ld)\n", 50 __func__, block, inode->i_blocks, inode->i_size); 51 #endif 52 return 0; 53 } 54 55 return efs_map_block(inode, block); 56 } 57