netdev: Extract netdev vport functions.

All devices implemented as vports have a common interface, so
pull out ioctl code from the GRE netdev so it can be used in
other places as well.

lib/netdev-vport.c

@@ -0,0 +1,246 @@
+/*
+ * 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 apatched 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 <sys/ioctl.h>
+
+#include "list.h"
+#include "netdev-vport.h"
+#include "openvswitch/datapath-protocol.h"
+#include "shash.h"
+#include "socket-util.h"
+
+#define THIS_MODULE VLM_netdev_vport
+#include "vlog.h"
+
+struct netdev_vport_notifier {
+    struct netdev_notifier notifier;
+    struct list list_node;
+    struct shash_node *shash_node; 
+};
+
+static struct shash netdev_vport_notifiers =
+                                    SHASH_INITIALIZER(&netdev_vport_notifiers);
+
+static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
+
+int
+netdev_vport_do_ioctl(int cmd, void *arg)
+{
+    static int ioctl_fd = -1;
+
+    if (ioctl_fd < 0) {
+        ioctl_fd = open("/dev/net/dp0", O_RDONLY | O_NONBLOCK);
+        if (ioctl_fd < 0) {
+            VLOG_ERR_RL(&rl, "failed to open ioctl fd: %s", strerror(errno));
+            return errno;
+        }
+    }
+
+    return ioctl(ioctl_fd, cmd, arg) ? errno : 0;
+}
+
+int
+netdev_vport_set_etheraddr(struct netdev *netdev,
+                           const 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);
+
+    memcpy(vport_ether.ether_addr, mac, ETH_ADDR_LEN);
+
+    err = netdev_vport_do_ioctl(ODP_VPORT_ETHER_SET, &vport_ether);
+    if (err) {
+        return err;
+    }
+
+    netdev_vport_poll_notify(netdev);
+    return 0;
+}
+
+int
+netdev_vport_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 = netdev_vport_do_ioctl(ODP_VPORT_ETHER_GET, &vport_ether);
+    if (err) {
+        return err;
+    }
+
+    memcpy(mac, vport_ether.ether_addr, ETH_ADDR_LEN);
+    return 0;
+}
+
+int
+netdev_vport_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 = netdev_vport_do_ioctl(ODP_VPORT_MTU_GET, &vport_mtu);
+    if (err) {
+        return err;
+    }
+
+    *mtup = vport_mtu.mtu;
+    return 0;
+}
+
+int
+netdev_vport_get_carrier(const struct netdev *netdev OVS_UNUSED, bool *carrier)
+{
+    *carrier = true;
+    return 0;
+}
+
+int
+netdev_vport_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 = netdev_vport_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;
+}
+
+int
+netdev_vport_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 char *
+make_poll_name(const struct netdev *netdev)
+{
+    return xasprintf("%s:%s", netdev_get_type(netdev), netdev_get_name(netdev));
+}
+
+int
+netdev_vport_poll_add(struct netdev *netdev,
+                      void (*cb)(struct netdev_notifier *), void *aux,
+                      struct netdev_notifier **notifierp)
+{
+    char *poll_name = make_poll_name(netdev);
+    struct netdev_vport_notifier *notifier;
+    struct list *list;
+    struct shash_node *shash_node;
+
+    shash_node = shash_find_data(&netdev_vport_notifiers, poll_name);
+    if (!shash_node) {
+        list = xmalloc(sizeof *list);
+        list_init(list);
+        shash_node = shash_add(&netdev_vport_notifiers,
+			       netdev_get_name(netdev), list);
+    } else {
+        list = shash_node->data;
+    }
+
+    notifier = xmalloc(sizeof *notifier);
+    netdev_notifier_init(&notifier->notifier, netdev, cb, aux);
+    list_push_back(list, &notifier->list_node);
+    notifier->shash_node = shash_node;
+
+    *notifierp = &notifier->notifier;
+    free(poll_name);
+
+    return 0;
+}
+
+void
+netdev_vport_poll_remove(struct netdev_notifier *notifier_)
+{
+    struct netdev_vport_notifier *notifier =
+                CONTAINER_OF(notifier_, struct netdev_vport_notifier, notifier);
+
+    struct list *list;
+
+    list = list_remove(&notifier->list_node);
+    if (list_is_empty(list)) {
+        shash_delete(&netdev_vport_notifiers, notifier->shash_node);
+        free(list);
+    }
+
+    free(notifier);
+}
+
+void
+netdev_vport_poll_notify(const struct netdev *netdev)
+{
+    char *poll_name = make_poll_name(netdev);
+    struct list *list = shash_find_data(&netdev_vport_notifiers,
+                                        poll_name);
+
+    if (list) {
+        struct netdev_vport_notifier *notifier;
+
+        LIST_FOR_EACH (notifier, struct netdev_vport_notifier,
+                       list_node, list) {
+            struct netdev_notifier *n = &notifier->notifier;
+            n->cb(n);
+        }
+    }
+
+    free(poll_name);
+}