1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * file.c 4 * 5 * Copyright (c) 1999 Al Smith 6 * 7 * Portions derived from work (c) 1995,1996 Christian Vogelgsang. 8 */ 9 10 #include <linux/buffer_head.h> 11 #include "efs.h" 12 13 int efs_get_block(struct inode *inode, sector_t iblock, 14 struct buffer_head *bh_result, int create) 15 { 16 int error = -EROFS; 17 long phys; 18 19 if (create) 20 return error; 21 if (iblock >= inode->i_blocks) { 22 #ifdef DEBUG 23 /* 24 * i have no idea why this happens as often as it does 25 */ 26 pr_warn("%s(): block %d >= %ld (filesize %ld)\n", 27 __func__, block, inode->i_blocks, inode->i_size); 28 #endif 29 return 0; 30 } 31 phys = efs_map_block(inode, iblock); 32 if (phys) 33 map_bh(bh_result, inode->i_sb, phys); 34 return 0; 35 } 36 37 int efs_bmap(struct inode *inode, efs_block_t block) { 38 39 if (block < 0) { 40 pr_warn("%s(): block < 0\n", __func__); 41 return 0; 42 } 43 44 /* are we about to read past the end of a file ? */ 45 if (!(block < inode->i_blocks)) { 46 #ifdef DEBUG 47 /* 48 * i have no idea why this happens as often as it does 49 */ 50 pr_warn("%s(): block %d >= %ld (filesize %ld)\n", 51 __func__, block, inode->i_blocks, inode->i_size); 52 #endif 53 return 0; 54 } 55 56 return efs_map_block(inode, block); 57 } 58