--- /dev/null
+/*
+ * Copyright (c) 2011 Nicira Networks.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <config.h>
+
+#include <errno.h>
+#include <getopt.h>
+#include <linux/if_vlan.h>
+#include <linux/sockios.h>
+#include <net/if.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "command-line.h"
+#include "util.h"
+
+#define ADD_ALL_VLANS_CMD 10
+#define DEL_ALL_VLANS_CMD 11
+
+static void usage(void);
+static void parse_options(int argc, char *argv[]);
+
+int
+main(int argc, char *argv[])
+{
+ struct vlan_ioctl_args vlan_args;
+ const char *netdev, *setting;
+ int fd;
+
+ set_program_name(argv[0]);
+
+ parse_options(argc, argv);
+ if (argc - optind != 2) {
+ ovs_fatal(0, "exactly two non-option arguments are required "
+ "(use --help for help)");
+ }
+
+ memset(&vlan_args, 0, sizeof vlan_args);
+
+ /* Get command. */
+ setting = argv[optind + 1];
+ if (!strcmp(setting, "on")) {
+ vlan_args.cmd = ADD_ALL_VLANS_CMD;
+ } else if (!strcmp(setting, "off")) {
+ vlan_args.cmd = DEL_ALL_VLANS_CMD;
+ } else {
+ ovs_fatal(0, "second command line argument must be \"on\" or \"off\" "
+ "(not \"%s\")", setting);
+ }
+
+ /* Get network device name. */
+ netdev = argv[optind];
+ if (strlen(netdev) >= IFNAMSIZ) {
+ ovs_fatal(0, "%s: network device name too long", netdev);
+ }
+ strcpy(vlan_args.device1, netdev);
+
+ /* Execute operation. */
+ fd = socket(AF_INET, SOCK_STREAM, 0);
+ if (fd < 0) {
+ ovs_fatal(errno, "socket creation failed");
+ }
+ if (ioctl(fd, SIOCSIFVLAN, &vlan_args) < 0) {
+ if (errno == ENOPKG) {
+ ovs_fatal(0, "operation failed (8021q module not loaded)");
+ } else if (errno == EOPNOTSUPP) {
+ ovs_fatal(0, "operation failed (kernel does not support the "
+ "VLAN bug workaround)");
+ } else {
+ ovs_fatal(errno, "operation failed");
+ }
+ }
+ close(fd);
+
+ return 0;
+}
+
+static void
+usage(void)
+{
+ printf("\
+%s, for enabling or disabling the kernel VLAN bug workaround\n\
+usage: %s NETDEV SETTING\n\
+where NETDEV is a network device (e.g. \"eth0\")\n\
+ and SETTING is \"on\" to enable the workaround or \"off\" to disable it.\n\
+\n\
+Options:\n\
+ -h, --help Print this helpful information\n\
+ -V, --version Display version information\n",
+ program_name, program_name);
+ exit(EXIT_SUCCESS);
+}
+
+static void
+parse_options(int argc, char *argv[])
+{
+ static const struct option long_options[] = {
+ {"help", no_argument, NULL, 'h'},
+ {"version", no_argument, NULL, 'V'},
+ {0, 0, 0, 0},
+ };
+ char *short_options = long_options_to_short_options(long_options);
+
+ for (;;) {
+ int option;
+
+ option = getopt_long(argc, argv, "+t:hVe", long_options, NULL);
+ if (option == -1) {
+ break;
+ }
+ switch (option) {
+ case 'h':
+ usage();
+ break;
+
+ case 'V':
+ OVS_PRINT_VERSION(0, 0);
+ exit(EXIT_SUCCESS);
+
+ case '?':
+ exit(EXIT_FAILURE);
+
+ default:
+ NOT_REACHED();
+ }
+ }
+ free(short_options);
+}