1 /* 2 * 3 * Copyright (c) International Business Machines Corp., 2001 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 13 * the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 * 19 20 * This file will include user space functions that will drive 21 * the kernel module to test various functions and kernel 22 * calls. Each function will need to setup the tif structure 23 * so that the in parameters and out parameters are correctly 24 * initialized 25 * 26 * use tif structure for passing params between user 27 * space and kernel space, in some tests it is really not 28 * needed, and if nothing is needed to pass in utilize 29 * the ki_generic function below. the tif structure makes 30 * it easy to maintain all the tests if they have the same 31 * process in kernel space to read in params in the kernel 32 * module no matter what the test is 33 * 34 * author: Sean Ruyle 35 * date: 06/11/2003 36 * 37 * tmod_ki.c 38 */ 39 40 #include <stdlib.h> 41 #include <stdio.h> 42 #include <sys/ioctl.h> 43 #include "../kernel_space/tmod.h" 44 45 int ki_generic(int fd, int flag) 46 { 47 int rc; 48 tmod_interface_t tif; 49 50 /* 51 * build interface structure 52 */ 53 tif.in_len = 0; 54 tif.in_data = 0; 55 tif.out_len = 0; 56 tif.out_data = 0; 57 tif.out_rc = 0; 58 59 /* 60 * ioctl call for flag 61 */ 62 rc = ioctl(fd, flag, &tif); 63 if (rc) { 64 printf("Ioctl error\n"); 65 return rc; 66 } 67 if (tif.out_rc) { 68 printf("Specific errorr: "); 69 return tif.out_rc; 70 } 71 72 return rc; 73 } 74 75 #if 0 76 An example of using in_data to pass in a structure:ki_write_t wif; 77 tmod_interface_t tif; 78 79 //fill out wif structure 80 81 /* 82 * build interface structure 83 */ 84 tif.in_len = sizeof(ki_write_t); 85 tif.in_data = (caddr_t) & wif; 86 tif.out_len = 0; 87 tif.out_data = 0; 88 tif.out_rc = 0; 89 90 //make ioctl call 91 92 An example of using out_data to get back a structure:ki_read_t rif; 93 tmod_interface_t tif; 94 95 //fill out rif structure 96 rif.len = p_test->data[0]; 97 rif.handle = open_handle; 98 rif.data = (caddr_t) p_test->data[1]; 99 100 /* 101 * build interface structure 102 */ 103 tif.in_len = sizeof(ki_read_t); 104 tif.in_data = (caddr_t) & rif; 105 tif.out_len = 0; 106 tif.out_data = 0; 107 tif.out_rc = 0; 108 109 //make ioctl call 110 111 #endif 112
