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431488e6 | 1 | /* |
e0edde6f | 2 | * Copyright (c) 2011 Nicira, Inc. |
431488e6 BP |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
18 | ||
19 | #include <errno.h> | |
20 | #include <getopt.h> | |
21 | #include <linux/if_vlan.h> | |
22 | #include <linux/sockios.h> | |
23 | #include <net/if.h> | |
24 | #include <stdlib.h> | |
25 | #include <sys/ioctl.h> | |
f137ed09 | 26 | #include <sys/socket.h> |
431488e6 BP |
27 | #include <stdio.h> |
28 | #include <string.h> | |
29 | #include <unistd.h> | |
30 | ||
31 | #include "command-line.h" | |
32 | #include "util.h" | |
33 | ||
34 | #define ADD_ALL_VLANS_CMD 10 | |
35 | #define DEL_ALL_VLANS_CMD 11 | |
36 | ||
37 | static void usage(void); | |
38 | static void parse_options(int argc, char *argv[]); | |
39 | ||
40 | int | |
41 | main(int argc, char *argv[]) | |
42 | { | |
43 | struct vlan_ioctl_args vlan_args; | |
44 | const char *netdev, *setting; | |
45 | int fd; | |
46 | ||
47 | set_program_name(argv[0]); | |
48 | ||
49 | parse_options(argc, argv); | |
50 | if (argc - optind != 2) { | |
51 | ovs_fatal(0, "exactly two non-option arguments are required " | |
52 | "(use --help for help)"); | |
53 | } | |
54 | ||
55 | memset(&vlan_args, 0, sizeof vlan_args); | |
56 | ||
57 | /* Get command. */ | |
58 | setting = argv[optind + 1]; | |
59 | if (!strcmp(setting, "on")) { | |
60 | vlan_args.cmd = ADD_ALL_VLANS_CMD; | |
61 | } else if (!strcmp(setting, "off")) { | |
62 | vlan_args.cmd = DEL_ALL_VLANS_CMD; | |
63 | } else { | |
64 | ovs_fatal(0, "second command line argument must be \"on\" or \"off\" " | |
65 | "(not \"%s\")", setting); | |
66 | } | |
67 | ||
68 | /* Get network device name. */ | |
69 | netdev = argv[optind]; | |
70 | if (strlen(netdev) >= IFNAMSIZ) { | |
71 | ovs_fatal(0, "%s: network device name too long", netdev); | |
72 | } | |
73 | strcpy(vlan_args.device1, netdev); | |
74 | ||
75 | /* Execute operation. */ | |
76 | fd = socket(AF_INET, SOCK_STREAM, 0); | |
77 | if (fd < 0) { | |
78 | ovs_fatal(errno, "socket creation failed"); | |
79 | } | |
80 | if (ioctl(fd, SIOCSIFVLAN, &vlan_args) < 0) { | |
81 | if (errno == ENOPKG) { | |
82 | ovs_fatal(0, "operation failed (8021q module not loaded)"); | |
83 | } else if (errno == EOPNOTSUPP) { | |
84 | ovs_fatal(0, "operation failed (kernel does not support the " | |
85 | "VLAN bug workaround)"); | |
86 | } else { | |
87 | ovs_fatal(errno, "operation failed"); | |
88 | } | |
89 | } | |
90 | close(fd); | |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
95 | static void | |
96 | usage(void) | |
97 | { | |
98 | printf("\ | |
99 | %s, for enabling or disabling the kernel VLAN bug workaround\n\ | |
100 | usage: %s NETDEV SETTING\n\ | |
101 | where NETDEV is a network device (e.g. \"eth0\")\n\ | |
102 | and SETTING is \"on\" to enable the workaround or \"off\" to disable it.\n\ | |
103 | \n\ | |
104 | Options:\n\ | |
105 | -h, --help Print this helpful information\n\ | |
106 | -V, --version Display version information\n", | |
107 | program_name, program_name); | |
108 | exit(EXIT_SUCCESS); | |
109 | } | |
110 | ||
111 | static void | |
112 | parse_options(int argc, char *argv[]) | |
113 | { | |
114 | static const struct option long_options[] = { | |
115 | {"help", no_argument, NULL, 'h'}, | |
116 | {"version", no_argument, NULL, 'V'}, | |
e3c17733 | 117 | {NULL, 0, NULL, 0}, |
431488e6 | 118 | }; |
5f383751 | 119 | char *short_options = ovs_cmdl_long_options_to_short_options(long_options); |
431488e6 BP |
120 | |
121 | for (;;) { | |
122 | int option; | |
123 | ||
124 | option = getopt_long(argc, argv, "+t:hVe", long_options, NULL); | |
125 | if (option == -1) { | |
126 | break; | |
127 | } | |
128 | switch (option) { | |
129 | case 'h': | |
130 | usage(); | |
131 | break; | |
132 | ||
133 | case 'V': | |
55d5bb44 | 134 | ovs_print_version(0, 0); |
431488e6 BP |
135 | exit(EXIT_SUCCESS); |
136 | ||
137 | case '?': | |
138 | exit(EXIT_FAILURE); | |
139 | ||
140 | default: | |
428b2edd | 141 | OVS_NOT_REACHED(); |
431488e6 BP |
142 | } |
143 | } | |
144 | free(short_options); | |
145 | } |