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      1 /*
      2  *
      3  * Copyright (c) Rusty Russell <rusty (at) rustcorp.com.au>
      4  * Copyright (c) International Business Machines  Corp., 2008
      5  *
      6  * This program is free software;  you can redistribute it and/or modify
      7  * it under the terms of the GNU General Public License as published by
      8  * the Free Software Foundation; either version 2 of the License, or
      9  * (at your option) any later version.
     10  *
     11  * This program is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY;  without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
     14  * the GNU General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU General Public License
     17  * along with this program;  if not, write to the Free Software
     18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
     19  */
     20 
     21 /*
     22  *
     23  *
     24  * File:        ioctl03.c
     25  *
     26  * Description: This program tests whether all the valid IFF flags are
     27  *              returned properly by implementation of TUNGETFEATURES ioctl
     28  *              on kernel 2.6.27
     29  *
     30  * Total Tests: 1
     31  *
     32  * Test Name:   ioctl03
     33  *
     34  * Author:      Rusty Russell <rusty (at) rustcorp.com.au>
     35  *
     36  * History:     Created - Nov 28 2008 - Rusty Russell <rusty (at) rustcorp.com.au>
     37  *              Ported to LTP
     38  *                      - Nov 28 2008 - Subrata <subrata (at) linux.vnet.ibm.com>
     39  */
     40 
     41 #include <sys/types.h>
     42 #include <sys/ioctl.h>
     43 #include <sys/stat.h>
     44 #include <fcntl.h>
     45 #include <errno.h>
     46 #include <stdio.h>
     47 #include <linux/if_tun.h>
     48 
     49 #include "test.h"
     50 
     51 #ifndef TUNGETFEATURES
     52 #define TUNGETFEATURES _IOR('T', 207, unsigned int)
     53 #endif
     54 
     55 #ifndef IFF_VNET_HDR
     56 #define IFF_VNET_HDR	0x4000
     57 #endif
     58 
     59 #ifndef IFF_MULTI_QUEUE
     60 #define IFF_MULTI_QUEUE	0x0100
     61 #endif
     62 
     63 char *TCID = "ioctl03";
     64 int TST_TOTAL = 1;
     65 
     66 static void cleanup(void)
     67 {
     68 	tst_rmdir();
     69 }
     70 
     71 static void setup(void)
     72 {
     73 	TEST_PAUSE;
     74 	tst_tmpdir();
     75 }
     76 
     77 static struct {
     78 	unsigned int flag;
     79 	const char *name;
     80 } known_flags[] = {
     81 	{
     82 	IFF_TUN, "TUN"}, {
     83 	IFF_TAP, "TAP"}, {
     84 	IFF_NO_PI, "NO_PI"}, {
     85 	IFF_ONE_QUEUE, "ONE_QUEUE"}, {
     86 	IFF_VNET_HDR, "VNET_HDR"}, {
     87 	IFF_MULTI_QUEUE, "MULTI_QUEUE"}
     88 };
     89 
     90 int main(void)
     91 {
     92 	unsigned int features, i;
     93 
     94 	setup();
     95 	tst_require_root();
     96 
     97 	int netfd = open("/dev/net/tun", O_RDWR);
     98 	if (netfd < 0)
     99 		tst_brkm(TBROK | TERRNO, cleanup,
    100 			 "opening /dev/net/tun failed");
    101 
    102 	if (ioctl(netfd, TUNGETFEATURES, &features) != 0)
    103 		tst_brkm(TCONF, cleanup,
    104 			 "Kernel does not support TUNGETFEATURES");
    105 	tst_resm(TINFO, "Available features are: %#x", features);
    106 	for (i = 0; i < sizeof(known_flags) / sizeof(known_flags[0]); i++) {
    107 		if (features & known_flags[i].flag) {
    108 			features &= ~known_flags[i].flag;
    109 			tst_resm(TINFO, "%s %#x", known_flags[i].name,
    110 				 known_flags[i].flag);
    111 		}
    112 	}
    113 	if (features)
    114 		tst_resm(TFAIL, "(UNKNOWN %#x)", features);
    115 	cleanup();
    116 	tst_exit();
    117 }
    118