--- /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 "vlandev.h"
+
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+
+#include "hash.h"
+#include "rtnetlink-link.h"
+#include "shash.h"
+#include "vlog.h"
+
+VLOG_DEFINE_THIS_MODULE(vlandev);
+
+#ifdef __linux__
+#include <linux/if_vlan.h>
+#include <linux/sockios.h>
+#include "netdev-linux.h"
+
+static struct nln_notifier *vlan_cache_notifier;
+static struct shash vlan_devs = SHASH_INITIALIZER(&vlan_devs);
+static struct shash vlan_real_devs = SHASH_INITIALIZER(&vlan_real_devs);
+static bool cache_valid;
+
+static void
+vlan_cache_cb(const struct rtnetlink_link_change *change OVS_UNUSED,
+ void *aux OVS_UNUSED)
+{
+ cache_valid = false;
+}
+
+int
+vlandev_refresh(void)
+{
+ const char *fn = "/proc/net/vlan/config";
+ struct shash_node *node;
+ char line[128];
+ FILE *stream;
+
+ if (!vlan_cache_notifier) {
+ vlan_cache_notifier = rtnetlink_link_notifier_create(vlan_cache_cb,
+ NULL);
+ if (!vlan_cache_notifier) {
+ return EINVAL;
+ }
+ }
+
+ if (cache_valid) {
+ return 0;
+ }
+
+ /* Free old cache.
+ *
+ * The 'name' members point to strings owned by the "shash"es so we do not
+ * free them ourselves. */
+ shash_clear_free_data(&vlan_devs);
+ SHASH_FOR_EACH (node, &vlan_real_devs) {
+ struct vlan_real_dev *vrd = node->data;
+
+ hmap_destroy(&vrd->vlan_devs);
+ }
+ shash_clear_free_data(&vlan_real_devs);
+
+ /* Repopulate cache. */
+ stream = fopen(fn, "r");
+ if (!stream) {
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
+ int error = errno;
+ struct stat s;
+
+ if (error == ENOENT && !stat("/proc", &s)) {
+ /* Probably the vlan module just isn't loaded, and probably that's
+ * because no VLAN devices have been created.
+ *
+ * Not really an error. */
+ return 0;
+ }
+
+ VLOG_WARN_RL(&rl, "%s: open failed (%s)", fn, strerror(error));
+ return error;
+ }
+
+ while (fgets(line, sizeof line, stream)) {
+ char vlan_dev[16], real_dev[16];
+ int vid;
+
+ if (sscanf(line, "%15[^ |] | %d | %15s", vlan_dev, &vid, real_dev) == 3
+ && vid >= 0 && vid <= 4095
+ && !shash_find(&vlan_devs, vlan_dev)) {
+ struct vlan_real_dev *vrd;
+ struct vlan_dev *vd;
+
+ vrd = shash_find_data(&vlan_real_devs, real_dev);
+ if (!vrd) {
+ vrd = xmalloc(sizeof *vrd);
+ vrd->name = xstrdup(real_dev);
+ hmap_init(&vrd->vlan_devs);
+ shash_add_nocopy(&vlan_real_devs, vrd->name, vrd);
+ }
+
+ vd = xmalloc(sizeof *vd);
+ hmap_insert(&vrd->vlan_devs, &vd->hmap_node, hash_int(vid, 0));
+ vd->name = xstrdup(vlan_dev);
+ vd->vid = vid;
+ vd->real_dev = vrd;
+ shash_add_nocopy(&vlan_devs, vd->name, vd);
+ }
+ }
+ fclose(stream);
+
+ cache_valid = true;
+ return 0;
+}
+
+struct shash *
+vlandev_get_real_devs(void)
+{
+ return &vlan_real_devs;
+}
+
+const char *
+vlandev_get_name(const char *real_dev_name, int vid)
+{
+ const struct vlan_real_dev *real_dev;
+
+ real_dev = shash_find_data(&vlan_real_devs, real_dev_name);
+ if (real_dev) {
+ const struct vlan_dev *vlan_dev;
+
+ HMAP_FOR_EACH_WITH_HASH (vlan_dev, hmap_node, hash_int(vid, 0),
+ &real_dev->vlan_devs) {
+ if (vlan_dev->vid == vid) {
+ return vlan_dev->name;
+ }
+ }
+ }
+
+ return NULL;
+}
+
+static int
+do_vlan_ioctl(const char *netdev_name, struct vlan_ioctl_args *via,
+ int cmd, const char *cmd_name)
+{
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
+ int error;
+ int sock;
+
+ via->cmd = cmd;
+ ovs_strlcpy(via->device1, netdev_name, sizeof via->device1);
+
+ sock = netdev_linux_get_af_inet_sock();
+ if (sock < 0) {
+ return -sock;
+ }
+
+ error = ioctl(sock, SIOCSIFVLAN, via) < 0 ? errno : 0;
+ if (error) {
+ VLOG_WARN_RL(&rl, "%s: VLAN ioctl %s failed (%s)",
+ netdev_name, cmd_name, strerror(error));
+ }
+ return error;
+}
+
+int
+vlandev_add(const char *real_dev, int vid)
+{
+ struct vlan_ioctl_args via;
+ int error;
+
+ memset(&via, 0, sizeof via);
+ via.u.VID = vid;
+
+ error = do_vlan_ioctl(real_dev, &via, ADD_VLAN_CMD, "ADD_VLAN_CMD");
+ if (!error) {
+ cache_valid = false;
+ }
+ return error;
+}
+
+int
+vlandev_del(const char *vlan_dev)
+{
+ struct vlan_ioctl_args via;
+ int error;
+
+ memset(&via, 0, sizeof via);
+ error = do_vlan_ioctl(vlan_dev, &via, DEL_VLAN_CMD, "DEL_VLAN_CMD");
+ if (!error) {
+ cache_valid = false;
+ }
+ return error;
+}
+#else /* !__linux__ */
+/* Stubs. */
+
+int
+vlandev_refresh(void)
+{
+ return 0;
+}
+
+struct shash *
+vlandev_get_real_devs(void)
+{
+ static struct shash vlan_real_devs = SHASH_INITIALIZER(&vlan_real_devs);
+
+ return &vlan_real_devs;
+}
+
+const char *
+vlandev_get_name(const char *real_dev_name OVS_UNUSED, int vid OVS_UNUSED)
+{
+ return NULL;
+}
+
+int
+vlandev_add(const char *real_dev OVS_UNUSED, int vid OVS_UNUSED)
+{
+ VLOG_ERR("not supported on non-Linux platform");
+ return EOPNOTSUPP;
+}
+
+int
+vlandev_del(const char *vlan_dev OVS_UNUSED)
+{
+ VLOG_ERR("not supported on non-Linux platform");
+ return EOPNOTSUPP;
+}
+#endif
--- /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.
+ */
+
+#ifndef VLANDEV_H
+#define VLANDEV_H 1
+
+#include "hmap.h"
+
+/* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
+ *
+ * This is deprecated. It is only for compatibility with broken device
+ * drivers in old versions of Linux that do not properly support VLANs when
+ * VLAN devices are not used. When broken device drivers are no longer in
+ * widespread use, we will delete these interfaces. */
+
+/* A VLAN device (e.g. "eth0.10" for VLAN 10 on eth0). */
+struct vlan_dev {
+ struct vlan_real_dev *real_dev; /* Parent, e.g. "eth0". */
+ struct hmap_node hmap_node; /* In vlan_real_dev's "vlan_devs" map. */
+ char *name; /* VLAN device name, e.g. "eth0.10". */
+ int vid; /* VLAN ID, e.g. 10. */
+};
+
+/* A device that has VLAN devices broken out of it. */
+struct vlan_real_dev {
+ char *name; /* Name, e.g. "eth0". */
+ struct hmap vlan_devs; /* All child VLAN devices, hashed by VID. */
+};
+
+int vlandev_refresh(void);
+
+struct shash *vlandev_get_real_devs(void);
+
+const char *vlandev_get_name(const char *real_dev_name, int vid);
+
+int vlandev_add(const char *real_dev, int vid);
+int vlandev_del(const char *vlan_dev);
+
+#endif /* vlandev.h */
projects / openvswitch / commitdiff