2 * Copyright (c) 2011 Nicira, Inc.
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:
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
22 #include <sys/ioctl.h>
26 #include "rtnetlink-link.h"
30 VLOG_DEFINE_THIS_MODULE(vlandev);
33 #include <linux/if_vlan.h>
34 #include <linux/sockios.h>
35 #include "netdev-linux.h"
37 static struct nln_notifier *vlan_cache_notifier;
38 static struct shash vlan_devs = SHASH_INITIALIZER(&vlan_devs);
39 static struct shash vlan_real_devs = SHASH_INITIALIZER(&vlan_real_devs);
40 static bool cache_valid;
43 vlan_cache_cb(const struct rtnetlink_link_change *change OVS_UNUSED,
52 const char *fn = "/proc/net/vlan/config";
53 struct shash_node *node;
57 if (!vlan_cache_notifier) {
58 vlan_cache_notifier = rtnetlink_link_notifier_create(vlan_cache_cb,
60 if (!vlan_cache_notifier) {
71 * The 'name' members point to strings owned by the "shash"es so we do not
72 * free them ourselves. */
73 shash_clear_free_data(&vlan_devs);
74 SHASH_FOR_EACH (node, &vlan_real_devs) {
75 struct vlan_real_dev *vrd = node->data;
77 hmap_destroy(&vrd->vlan_devs);
79 shash_clear_free_data(&vlan_real_devs);
81 /* Repopulate cache. */
82 stream = fopen(fn, "r");
84 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
88 if (error == ENOENT && !stat("/proc", &s)) {
89 /* Probably the vlan module just isn't loaded, and probably that's
90 * because no VLAN devices have been created.
92 * Not really an error. */
96 VLOG_WARN_RL(&rl, "%s: open failed (%s)", fn, strerror(error));
100 while (fgets(line, sizeof line, stream)) {
101 char vlan_dev[16], real_dev[16];
104 if (sscanf(line, "%15[^ |] | %d | %15s", vlan_dev, &vid, real_dev) == 3
105 && vid >= 0 && vid <= 4095
106 && !shash_find(&vlan_devs, vlan_dev)) {
107 struct vlan_real_dev *vrd;
110 vrd = shash_find_data(&vlan_real_devs, real_dev);
112 vrd = xmalloc(sizeof *vrd);
113 vrd->name = xstrdup(real_dev);
114 hmap_init(&vrd->vlan_devs);
115 shash_add_nocopy(&vlan_real_devs, vrd->name, vrd);
118 vd = xmalloc(sizeof *vd);
119 hmap_insert(&vrd->vlan_devs, &vd->hmap_node, hash_int(vid, 0));
120 vd->name = xstrdup(vlan_dev);
123 shash_add_nocopy(&vlan_devs, vd->name, vd);
133 vlandev_get_real_devs(void)
135 return &vlan_real_devs;
139 vlandev_get_name(const char *real_dev_name, int vid)
141 const struct vlan_real_dev *real_dev;
143 real_dev = shash_find_data(&vlan_real_devs, real_dev_name);
145 const struct vlan_dev *vlan_dev;
147 HMAP_FOR_EACH_WITH_HASH (vlan_dev, hmap_node, hash_int(vid, 0),
148 &real_dev->vlan_devs) {
149 if (vlan_dev->vid == vid) {
150 return vlan_dev->name;
159 do_vlan_ioctl(const char *netdev_name, struct vlan_ioctl_args *via,
160 int cmd, const char *cmd_name)
162 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
167 ovs_strlcpy(via->device1, netdev_name, sizeof via->device1);
169 sock = netdev_linux_get_af_inet_sock();
174 error = ioctl(sock, SIOCSIFVLAN, via) < 0 ? errno : 0;
176 VLOG_WARN_RL(&rl, "%s: VLAN ioctl %s failed (%s)",
177 netdev_name, cmd_name, strerror(error));
183 vlandev_add(const char *real_dev, int vid)
185 struct vlan_ioctl_args via;
188 memset(&via, 0, sizeof via);
191 error = do_vlan_ioctl(real_dev, &via, ADD_VLAN_CMD, "ADD_VLAN_CMD");
199 vlandev_del(const char *vlan_dev)
201 struct vlan_ioctl_args via;
204 memset(&via, 0, sizeof via);
205 error = do_vlan_ioctl(vlan_dev, &via, DEL_VLAN_CMD, "DEL_VLAN_CMD");
211 #else /* !__linux__ */
215 vlandev_refresh(void)
221 vlandev_get_real_devs(void)
223 static struct shash vlan_real_devs = SHASH_INITIALIZER(&vlan_real_devs);
225 return &vlan_real_devs;
229 vlandev_get_name(const char *real_dev_name OVS_UNUSED, int vid OVS_UNUSED)
235 vlandev_add(const char *real_dev OVS_UNUSED, int vid OVS_UNUSED)
237 VLOG_ERR("not supported on non-Linux platform");
242 vlandev_del(const char *vlan_dev OVS_UNUSED)
244 VLOG_ERR("not supported on non-Linux platform");