+EXPORT_SYMBOL_GPL(close_candev);
+
+#ifndef CONFIG_CAN_DEV_SYSFS
+/*
+ * CAN netlink interface
+ */
+static const struct nla_policy can_policy[IFLA_CAN_MAX + 1] = {
+ [IFLA_CAN_STATE] = { .type = NLA_U32 },
+ [IFLA_CAN_CTRLMODE] = { .len = sizeof(struct can_ctrlmode) },
+ [IFLA_CAN_RESTART_MS] = { .type = NLA_U32 },
+ [IFLA_CAN_RESTART] = { .type = NLA_U32 },
+ [IFLA_CAN_BITTIMING] = { .len = sizeof(struct can_bittiming) },
+ [IFLA_CAN_BITTIMING_CONST]
+ = { .len = sizeof(struct can_bittiming_const) },
+ [IFLA_CAN_CLOCK] = { .len = sizeof(struct can_clock) },
+ [IFLA_CAN_BERR_COUNTER] = { .len = sizeof(struct can_berr_counter) },
+};
+
+static int can_changelink(struct net_device *dev,
+ struct nlattr *tb[], struct nlattr *data[])
+{
+ struct can_priv *priv = netdev_priv(dev);
+ int err;
+
+ /* We need synchronization with dev->stop() */
+ ASSERT_RTNL();
+
+ if (data[IFLA_CAN_CTRLMODE]) {
+ struct can_ctrlmode *cm;
+
+ /* Do not allow changing controller mode while running */
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+ cm = nla_data(data[IFLA_CAN_CTRLMODE]);
+ if (cm->flags & ~priv->ctrlmode_supported)
+ return -EOPNOTSUPP;
+ priv->ctrlmode &= ~cm->mask;
+ priv->ctrlmode |= cm->flags;
+ }
+
+ if (data[IFLA_CAN_BITTIMING]) {
+ struct can_bittiming bt;
+
+ /* Do not allow changing bittiming while running */
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+ memcpy(&bt, nla_data(data[IFLA_CAN_BITTIMING]), sizeof(bt));
+ if ((!bt.bitrate && !bt.tq) || (bt.bitrate && bt.tq))
+ return -EINVAL;
+ err = can_get_bittiming(dev, &bt);
+ if (err)
+ return err;
+ memcpy(&priv->bittiming, &bt, sizeof(bt));
+
+ if (priv->do_set_bittiming) {
+ /* Finally, set the bit-timing registers */
+ err = priv->do_set_bittiming(dev);
+ if (err)
+ return err;
+ }
+ }
+
+ if (data[IFLA_CAN_RESTART_MS]) {
+ /* Do not allow changing restart delay while running */
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+ priv->restart_ms = nla_get_u32(data[IFLA_CAN_RESTART_MS]);
+ }
+
+ if (data[IFLA_CAN_RESTART]) {
+ /* Do not allow a restart while not running */
+ if (!(dev->flags & IFF_UP))
+ return -EINVAL;
+ err = can_restart_now(dev);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static size_t can_get_size(const struct net_device *dev)
+{
+ struct can_priv *priv = netdev_priv(dev);
+ size_t size;
+
+ size = nla_total_size(sizeof(u32)); /* IFLA_CAN_STATE */
+ size += sizeof(struct can_ctrlmode); /* IFLA_CAN_CTRLMODE */
+ size += nla_total_size(sizeof(u32)); /* IFLA_CAN_RESTART_MS */
+ size += sizeof(struct can_bittiming); /* IFLA_CAN_BITTIMING */
+ size += sizeof(struct can_clock); /* IFLA_CAN_CLOCK */
+ if (priv->do_get_berr_counter) /* IFLA_CAN_BERR_COUNTER */
+ size += sizeof(struct can_berr_counter);
+ if (priv->bittiming_const) /* IFLA_CAN_BITTIMING_CONST */
+ size += sizeof(struct can_bittiming_const);
+
+ return size;
+}
+
+static int can_fill_info(struct sk_buff *skb, const struct net_device *dev)
+{
+ struct can_priv *priv = netdev_priv(dev);
+ struct can_ctrlmode cm = {.flags = priv->ctrlmode};
+ struct can_berr_counter bec;
+ enum can_state state = priv->state;
+
+ if (priv->do_get_state)
+ priv->do_get_state(dev, &state);
+ NLA_PUT_U32(skb, IFLA_CAN_STATE, state);
+ NLA_PUT(skb, IFLA_CAN_CTRLMODE, sizeof(cm), &cm);
+ NLA_PUT_U32(skb, IFLA_CAN_RESTART_MS, priv->restart_ms);
+ NLA_PUT(skb, IFLA_CAN_BITTIMING,
+ sizeof(priv->bittiming), &priv->bittiming);
+ NLA_PUT(skb, IFLA_CAN_CLOCK, sizeof(cm), &priv->clock);
+ if (priv->do_get_berr_counter && !priv->do_get_berr_counter(dev, &bec))
+ NLA_PUT(skb, IFLA_CAN_BERR_COUNTER, sizeof(bec), &bec);
+ if (priv->bittiming_const)
+ NLA_PUT(skb, IFLA_CAN_BITTIMING_CONST,
+ sizeof(*priv->bittiming_const), priv->bittiming_const);
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static size_t can_get_xstats_size(const struct net_device *dev)
+{
+ return sizeof(struct can_device_stats);
+}
+
+static int can_fill_xstats(struct sk_buff *skb, const struct net_device *dev)
+{
+ struct can_priv *priv = netdev_priv(dev);
+
+ NLA_PUT(skb, IFLA_INFO_XSTATS,
+ sizeof(priv->can_stats), &priv->can_stats);
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33)
+static int can_newlink(struct net_device *dev,
+ struct nlattr *tb[], struct nlattr *data[])
+#else
+static int can_newlink(struct net *src_net, struct net_device *dev,
+ struct nlattr *tb[], struct nlattr *data[])
+#endif
+{
+ return -EOPNOTSUPP;
+}
+
+static struct rtnl_link_ops can_link_ops __read_mostly = {
+ .kind = "can",
+ .maxtype = IFLA_CAN_MAX,
+ .policy = can_policy,
+ .setup = can_setup,
+ .newlink = can_newlink,
+ .changelink = can_changelink,
+ .get_size = can_get_size,
+ .fill_info = can_fill_info,
+ .get_xstats_size = can_get_xstats_size,
+ .fill_xstats = can_fill_xstats,
+};
+
+#endif /* !CONFIG_CAN_DEV_SYSFS */
+
+/*
+ * Register the CAN network device
+ */
+int register_candev(struct net_device *dev)
+{
+#ifdef CONFIG_CAN_DEV_SYSFS
+ int err;
+
+ err = register_netdev(dev);
+ if (!err)
+ can_create_sysfs(dev);
+
+ return err;
+#else
+ dev->rtnl_link_ops = &can_link_ops;
+ return register_netdev(dev);
+#endif
+}
+EXPORT_SYMBOL_GPL(register_candev);
+
+/*
+ * Unregister the CAN network device
+ */
+void unregister_candev(struct net_device *dev)
+{
+#ifdef CONFIG_CAN_DEV_SYSFS
+ can_remove_sysfs(dev);
+#endif
+ unregister_netdev(dev);
+}
+EXPORT_SYMBOL_GPL(unregister_candev);