--- /dev/null
+/*
+ * Copyright (c) 2010 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 <fcntl.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
+
+#include "list.h"
+#include "netdev-provider.h"
+#include "openflow/openflow.h"
+#include "openvswitch/datapath-protocol.h"
+#include "openvswitch/gre.h"
+#include "packets.h"
+#include "shash.h"
+#include "socket-util.h"
+
+#define THIS_MODULE VLM_netdev_gre
+#include "vlog.h"
+
+struct netdev_dev_gre {
+ struct netdev_dev netdev_dev;
+};
+
+struct netdev_gre {
+ struct netdev netdev;
+};
+
+struct netdev_gre_notifier {
+ struct netdev_notifier notifier;
+ struct list node;
+};
+
+static int ioctl_fd = -1;
+static struct shash netdev_gre_notifiers =
+ SHASH_INITIALIZER(&netdev_gre_notifiers);
+
+static void poll_notify(const struct netdev_gre *netdev);
+
+static struct netdev_dev_gre *
+netdev_dev_gre_cast(const struct netdev_dev *netdev_dev)
+{
+ netdev_dev_assert_class(netdev_dev, &netdev_grenew_class);
+ return CONTAINER_OF(netdev_dev, struct netdev_dev_gre, netdev_dev);
+}
+
+static struct netdev_gre *
+netdev_gre_cast(const struct netdev *netdev)
+{
+ netdev_assert_class(netdev, &netdev_grenew_class);
+ return CONTAINER_OF(netdev, struct netdev_gre, netdev);
+}
+
+static int
+netdev_gre_init(void)
+{
+ static int status = -1;
+ if (status < 0) {
+ ioctl_fd = open("/dev/net/dp0", O_RDONLY | O_NONBLOCK);
+ status = ioctl_fd >= 0 ? 0 : errno;
+ if (status) {
+ VLOG_ERR("failed to open ioctl fd: %s", strerror(status));
+ }
+ }
+ return status;
+}
+
+static int
+do_ioctl(int cmd, void *arg)
+{
+ return ioctl(ioctl_fd, cmd, arg) ? errno : 0;
+}
+
+static int
+parse_config(const char *name, const struct shash *args,
+ struct gre_port_config *config)
+{
+ struct shash_node *node;
+
+ memset(config, 0, sizeof *config);
+
+ config->flags |= GRE_F_IN_CSUM;
+ config->flags |= GRE_F_OUT_CSUM;
+ config->flags |= GRE_F_PMTUD;
+
+ SHASH_FOR_EACH (node, args) {
+ if (!strcmp(node->name, "remote_ip")) {
+ struct in_addr in_addr;
+ if (lookup_ip(node->data, &in_addr)) {
+ VLOG_WARN("%s: bad gre 'remote_ip'", name);
+ } else {
+ config->daddr = in_addr.s_addr;
+ }
+ } else if (!strcmp(node->name, "local_ip")) {
+ struct in_addr in_addr;
+ if (lookup_ip(node->data, &in_addr)) {
+ VLOG_WARN("%s: bad gre 'local_ip'", name);
+ } else {
+ config->saddr = in_addr.s_addr;
+ }
+ } else if (!strcmp(node->name, "key")) {
+ if (!strcmp(node->data, "flow")) {
+ config->flags |= GRE_F_IN_KEY_MATCH;
+ config->flags |= GRE_F_OUT_KEY_ACTION;
+ } else {
+ config->out_key = config->in_key = htonl(atoi(node->data));
+ }
+ } else if (!strcmp(node->name, "in_key")) {
+ if (!strcmp(node->data, "flow")) {
+ config->flags |= GRE_F_IN_KEY_MATCH;
+ } else {
+ config->in_key = htonl(atoi(node->data));
+ }
+ } else if (!strcmp(node->name, "out_key")) {
+ if (!strcmp(node->data, "flow")) {
+ config->flags |= GRE_F_OUT_KEY_ACTION;
+ } else {
+ config->out_key = htonl(atoi(node->data));
+ }
+ } else if (!strcmp(node->name, "tos")) {
+ if (!strcmp(node->data, "inherit")) {
+ config->flags |= GRE_F_TOS_INHERIT;
+ } else {
+ config->tos = atoi(node->data);
+ }
+ } else if (!strcmp(node->name, "ttl")) {
+ if (!strcmp(node->data, "inherit")) {
+ config->flags |= GRE_F_TTL_INHERIT;
+ } else {
+ config->ttl = atoi(node->data);
+ }
+ } else if (!strcmp(node->name, "csum")) {
+ if (!strcmp(node->data, "false")) {
+ config->flags &= ~GRE_F_IN_CSUM;
+ config->flags &= ~GRE_F_OUT_CSUM;
+ }
+ } else if (!strcmp(node->name, "pmtud")) {
+ if (!strcmp(node->data, "false")) {
+ config->flags &= ~GRE_F_PMTUD;
+ }
+ } else {
+ VLOG_WARN("%s: unknown gre argument '%s'", name, node->name);
+ }
+ }
+
+ if (!config->daddr) {
+ VLOG_WARN("%s: gre type requires valid 'remote_ip' argument", name);
+ return EINVAL;
+ }
+
+ return 0;
+}
+
+static int
+netdev_gre_create(const char *name, const char *type OVS_UNUSED,
+ const struct shash *args, struct netdev_dev **netdev_devp)
+{
+ int err;
+ struct odp_vport_add ova;
+ struct gre_port_config port_config;
+ struct netdev_dev_gre *netdev_dev;
+
+ ovs_strlcpy(ova.port_type, "gre", sizeof ova.port_type);
+ ovs_strlcpy(ova.devname, name, sizeof ova.devname);
+ ova.config = &port_config;
+
+ err = parse_config(name, args, &port_config);
+ if (err) {
+ return err;
+ }
+
+ err = do_ioctl(ODP_VPORT_ADD, &ova);
+ if (err == EEXIST) {
+ VLOG_WARN("%s: destroying existing device", name);
+
+ err = do_ioctl(ODP_VPORT_DEL, ova.devname);
+ if (err) {
+ return err;
+ }
+
+ err = do_ioctl(ODP_VPORT_ADD, &ova);
+ }
+
+ if (err) {
+ return err;
+ }
+
+ netdev_dev = xmalloc(sizeof *netdev_dev);
+ netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_grenew_class);
+
+ *netdev_devp = &netdev_dev->netdev_dev;
+ return 0;
+}
+
+static int
+netdev_gre_reconfigure(struct netdev_dev *netdev_dev_, const struct shash *args)
+{
+ const char *name = netdev_dev_get_name(netdev_dev_);
+ struct odp_vport_mod ovm;
+ struct gre_port_config port_config;
+ int err;
+
+ ovs_strlcpy(ovm.devname, name, sizeof ovm.devname);
+ ovm.config = &port_config;
+
+ err = parse_config(name, args, &port_config);
+ if (err) {
+ return err;
+ }
+
+ return do_ioctl(ODP_VPORT_MOD, &ovm);
+}
+
+static void
+netdev_gre_destroy(struct netdev_dev *netdev_dev_)
+{
+ struct netdev_dev_gre *netdev_dev = netdev_dev_gre_cast(netdev_dev_);
+
+ do_ioctl(ODP_VPORT_DEL, (char *)netdev_dev_get_name(netdev_dev_));
+ free(netdev_dev);
+}
+
+static int
+netdev_gre_open(struct netdev_dev *netdev_dev_, int ethertype OVS_UNUSED,
+ struct netdev **netdevp)
+{
+ struct netdev_gre *netdev;
+
+ netdev = xmalloc(sizeof *netdev);
+ netdev_init(&netdev->netdev, netdev_dev_);
+
+ *netdevp = &netdev->netdev;
+ return 0;
+}
+
+static void
+netdev_gre_close(struct netdev *netdev_)
+{
+ struct netdev_gre *netdev = netdev_gre_cast(netdev_);
+ free(netdev);
+}
+
+static int
+netdev_gre_set_etheraddr(struct netdev *netdev_,
+ const uint8_t mac[ETH_ADDR_LEN])
+{
+ struct netdev_gre *netdev = netdev_gre_cast(netdev_);
+ struct odp_vport_ether vport_ether;
+ int err;
+
+ ovs_strlcpy(vport_ether.devname, netdev_get_name(netdev_),
+ sizeof vport_ether.devname);
+
+ memcpy(vport_ether.ether_addr, mac, ETH_ADDR_LEN);
+
+ err = ioctl(ioctl_fd, ODP_VPORT_ETHER_SET, &vport_ether);
+ if (err) {
+ return err;
+ }
+
+ poll_notify(netdev);
+ return 0;
+}
+
+static int
+netdev_gre_get_etheraddr(const struct netdev *netdev_,
+ uint8_t mac[ETH_ADDR_LEN])
+{
+ struct odp_vport_ether vport_ether;
+ int err;
+
+ ovs_strlcpy(vport_ether.devname, netdev_get_name(netdev_),
+ sizeof vport_ether.devname);
+
+ err = ioctl(ioctl_fd, ODP_VPORT_ETHER_GET, &vport_ether);
+ if (err) {
+ return err;
+ }
+
+ memcpy(mac, vport_ether.ether_addr, ETH_ADDR_LEN);
+ return 0;
+}
+
+static int
+netdev_gre_get_mtu(const struct netdev *netdev_, int *mtup)
+{
+ struct odp_vport_mtu vport_mtu;
+ int err;
+
+ ovs_strlcpy(vport_mtu.devname, netdev_get_name(netdev_),
+ sizeof vport_mtu.devname);
+
+ err = ioctl(ioctl_fd, ODP_VPORT_MTU_GET, &vport_mtu);
+ if (err) {
+ return err;
+ }
+
+ *mtup = vport_mtu.mtu;
+ return 0;
+}
+
+static int
+netdev_gre_get_carrier(const struct netdev *netdev OVS_UNUSED, bool *carrier)
+{
+ *carrier = true;
+ return 0;
+}
+
+static int
+netdev_gre_get_stats(const struct netdev *netdev_, struct netdev_stats *stats)
+{
+ const char *name = netdev_get_name(netdev_);
+ struct odp_vport_stats_req ovsr;
+ int err;
+
+ ovs_strlcpy(ovsr.devname, name, sizeof ovsr.devname);
+ err = do_ioctl(ODP_VPORT_STATS_GET, &ovsr);
+ if (err) {
+ return err;
+ }
+
+ stats->rx_packets = ovsr.stats.rx_packets;
+ stats->tx_packets = ovsr.stats.tx_packets;
+ stats->rx_bytes = ovsr.stats.rx_bytes;
+ stats->tx_bytes = ovsr.stats.tx_bytes;
+ stats->rx_errors = ovsr.stats.rx_errors;
+ stats->tx_errors = ovsr.stats.tx_errors;
+ stats->rx_dropped = ovsr.stats.rx_dropped;
+ stats->tx_dropped = ovsr.stats.tx_dropped;
+ stats->multicast = UINT64_MAX;
+ stats->collisions = ovsr.stats.collisions;
+ stats->rx_length_errors = UINT64_MAX;
+ stats->rx_over_errors = ovsr.stats.rx_over_err;
+ stats->rx_crc_errors = ovsr.stats.rx_crc_err;
+ stats->rx_frame_errors = ovsr.stats.rx_frame_err;
+ stats->rx_fifo_errors = UINT64_MAX;
+ stats->rx_missed_errors = UINT64_MAX;
+ stats->tx_aborted_errors = UINT64_MAX;
+ stats->tx_carrier_errors = UINT64_MAX;
+ stats->tx_fifo_errors = UINT64_MAX;
+ stats->tx_heartbeat_errors = UINT64_MAX;
+ stats->tx_window_errors = UINT64_MAX;
+
+ return 0;
+}
+
+static int
+netdev_gre_update_flags(struct netdev *netdev OVS_UNUSED,
+ enum netdev_flags off, enum netdev_flags on OVS_UNUSED,
+ enum netdev_flags *old_flagsp)
+{
+ if (off & (NETDEV_UP | NETDEV_PROMISC)) {
+ return EOPNOTSUPP;
+ }
+
+ *old_flagsp = NETDEV_UP | NETDEV_PROMISC;
+ return 0;
+}
+
+static int
+netdev_gre_poll_add(struct netdev *netdev, void (*cb)(struct netdev_notifier *),
+ void *aux, struct netdev_notifier **notifierp)
+{
+ const char *netdev_name = netdev_get_name(netdev);
+ struct netdev_gre_notifier *notifier;
+ struct list *list;
+
+ list = shash_find_data(&netdev_gre_notifiers, netdev_name);
+ if (!list) {
+ list = xmalloc(sizeof *list);
+ list_init(list);
+ shash_add(&netdev_gre_notifiers, netdev_name, list);
+ }
+
+ notifier = xmalloc(sizeof *notifier);
+ netdev_notifier_init(¬ifier->notifier, netdev, cb, aux);
+ list_push_back(list, ¬ifier->node);
+
+ *notifierp = ¬ifier->notifier;
+ return 0;
+}
+
+static void
+netdev_gre_poll_remove(struct netdev_notifier *notifier_)
+{
+ struct netdev_gre_notifier *notifier =
+ CONTAINER_OF(notifier_, struct netdev_gre_notifier, notifier);
+ struct list *list;
+
+ list = list_remove(¬ifier->node);
+ if (list_is_empty(list)) {
+ const char *netdev_name = netdev_get_name(notifier_->netdev);
+ shash_delete(&netdev_gre_notifiers,
+ shash_find(&netdev_gre_notifiers, netdev_name));
+ free(list);
+ }
+ free(notifier);
+}
+
+static void
+poll_notify(const struct netdev_gre *netdev)
+{
+ struct list *list = shash_find_data(&netdev_gre_notifiers,
+ netdev_get_name(&netdev->netdev));
+
+ if (list) {
+ struct netdev_gre_notifier *notifier;
+
+ LIST_FOR_EACH (notifier, struct netdev_gre_notifier, node, list) {
+ struct netdev_notifier *n = ¬ifier->notifier;
+ n->cb(n);
+ }
+ }
+}
+
+const struct netdev_class netdev_grenew_class = {
+ "grenew",
+
+ netdev_gre_init,
+ NULL, /* run */
+ NULL, /* wait */
+
+ netdev_gre_create,
+ netdev_gre_destroy,
+ netdev_gre_reconfigure,
+
+ netdev_gre_open,
+ netdev_gre_close,
+
+ NULL, /* enumerate */
+
+ NULL, /* recv */
+ NULL, /* recv_wait */
+ NULL, /* drain */
+
+ NULL, /* send */
+ NULL, /* send_wait */
+
+ netdev_gre_set_etheraddr,
+ netdev_gre_get_etheraddr,
+ netdev_gre_get_mtu,
+ NULL, /* get_ifindex */
+ netdev_gre_get_carrier,
+ netdev_gre_get_stats,
+
+ NULL, /* get_features */
+ NULL, /* set_advertisements */
+ NULL, /* get_vlan_vid */
+ NULL, /* set_policing */
+
+ NULL, /* get_in4 */
+ NULL, /* set_in4 */
+ NULL, /* get_in6 */
+ NULL, /* add_router */
+ NULL, /* get_next_hop */
+ NULL, /* arp_lookup */
+
+ netdev_gre_update_flags,
+
+ netdev_gre_poll_add,
+ netdev_gre_poll_remove,
+};
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