/*
* net/switchdev/switchdev.c - Switch device API
* Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
+ * Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include <linux/mutex.h>
#include <linux/notifier.h>
#include <linux/netdevice.h>
+#include <net/ip_fib.h>
#include <net/switchdev.h>
/**
int netdev_switch_parent_id_get(struct net_device *dev,
struct netdev_phys_item_id *psid)
{
- const struct net_device_ops *ops = dev->netdev_ops;
+ const struct swdev_ops *ops = dev->swdev_ops;
- if (!ops->ndo_switch_parent_id_get)
+ if (!ops || !ops->swdev_parent_id_get)
return -EOPNOTSUPP;
- return ops->ndo_switch_parent_id_get(dev, psid);
+ return ops->swdev_parent_id_get(dev, psid);
}
-EXPORT_SYMBOL(netdev_switch_parent_id_get);
+EXPORT_SYMBOL_GPL(netdev_switch_parent_id_get);
/**
* netdev_switch_port_stp_update - Notify switch device port of STP
*/
int netdev_switch_port_stp_update(struct net_device *dev, u8 state)
{
- const struct net_device_ops *ops = dev->netdev_ops;
+ const struct swdev_ops *ops = dev->swdev_ops;
+ struct net_device *lower_dev;
+ struct list_head *iter;
+ int err = -EOPNOTSUPP;
- if (!ops->ndo_switch_port_stp_update)
- return -EOPNOTSUPP;
- WARN_ON(!ops->ndo_switch_parent_id_get);
- return ops->ndo_switch_port_stp_update(dev, state);
+ if (ops && ops->swdev_port_stp_update)
+ return ops->swdev_port_stp_update(dev, state);
+
+ netdev_for_each_lower_dev(dev, lower_dev, iter) {
+ err = netdev_switch_port_stp_update(lower_dev, state);
+ if (err && err != -EOPNOTSUPP)
+ return err;
+ }
+
+ return err;
}
-EXPORT_SYMBOL(netdev_switch_port_stp_update);
+EXPORT_SYMBOL_GPL(netdev_switch_port_stp_update);
static DEFINE_MUTEX(netdev_switch_mutex);
static RAW_NOTIFIER_HEAD(netdev_switch_notif_chain);
/**
- * register_netdev_switch_notifier - Register nofifier
+ * register_netdev_switch_notifier - Register notifier
* @nb: notifier_block
*
* Register switch device notifier. This should be used by code
mutex_unlock(&netdev_switch_mutex);
return err;
}
-EXPORT_SYMBOL(register_netdev_switch_notifier);
+EXPORT_SYMBOL_GPL(register_netdev_switch_notifier);
/**
- * unregister_netdev_switch_notifier - Unregister nofifier
+ * unregister_netdev_switch_notifier - Unregister notifier
* @nb: notifier_block
*
* Unregister switch device notifier.
mutex_unlock(&netdev_switch_mutex);
return err;
}
-EXPORT_SYMBOL(unregister_netdev_switch_notifier);
+EXPORT_SYMBOL_GPL(unregister_netdev_switch_notifier);
/**
- * call_netdev_switch_notifiers - Call nofifiers
+ * call_netdev_switch_notifiers - Call notifiers
* @val: value passed unmodified to notifier function
* @dev: port device
* @info: notifier information data
mutex_unlock(&netdev_switch_mutex);
return err;
}
-EXPORT_SYMBOL(call_netdev_switch_notifiers);
+EXPORT_SYMBOL_GPL(call_netdev_switch_notifiers);
/**
* netdev_switch_port_bridge_setlink - Notify switch device port of bridge
return ops->ndo_bridge_setlink(dev, nlh, flags);
}
-EXPORT_SYMBOL(netdev_switch_port_bridge_setlink);
+EXPORT_SYMBOL_GPL(netdev_switch_port_bridge_setlink);
/**
* netdev_switch_port_bridge_dellink - Notify switch device port of bridge
return ops->ndo_bridge_dellink(dev, nlh, flags);
}
-EXPORT_SYMBOL(netdev_switch_port_bridge_dellink);
+EXPORT_SYMBOL_GPL(netdev_switch_port_bridge_dellink);
/**
* ndo_dflt_netdev_switch_port_bridge_setlink - default ndo bridge setlink
return ret;
}
-EXPORT_SYMBOL(ndo_dflt_netdev_switch_port_bridge_setlink);
+EXPORT_SYMBOL_GPL(ndo_dflt_netdev_switch_port_bridge_setlink);
/**
* ndo_dflt_netdev_switch_port_bridge_dellink - default ndo bridge dellink
return ret;
}
-EXPORT_SYMBOL(ndo_dflt_netdev_switch_port_bridge_dellink);
+EXPORT_SYMBOL_GPL(ndo_dflt_netdev_switch_port_bridge_dellink);
+
+static struct net_device *netdev_switch_get_lowest_dev(struct net_device *dev)
+{
+ const struct swdev_ops *ops = dev->swdev_ops;
+ struct net_device *lower_dev;
+ struct net_device *port_dev;
+ struct list_head *iter;
+
+ /* Recusively search down until we find a sw port dev.
+ * (A sw port dev supports swdev_parent_id_get).
+ */
+
+ if (dev->features & NETIF_F_HW_SWITCH_OFFLOAD &&
+ ops && ops->swdev_parent_id_get)
+ return dev;
+
+ netdev_for_each_lower_dev(dev, lower_dev, iter) {
+ port_dev = netdev_switch_get_lowest_dev(lower_dev);
+ if (port_dev)
+ return port_dev;
+ }
+
+ return NULL;
+}
+
+static struct net_device *netdev_switch_get_dev_by_nhs(struct fib_info *fi)
+{
+ struct netdev_phys_item_id psid;
+ struct netdev_phys_item_id prev_psid;
+ struct net_device *dev = NULL;
+ int nhsel;
+
+ /* For this route, all nexthop devs must be on the same switch. */
+
+ for (nhsel = 0; nhsel < fi->fib_nhs; nhsel++) {
+ const struct fib_nh *nh = &fi->fib_nh[nhsel];
+
+ if (!nh->nh_dev)
+ return NULL;
+
+ dev = netdev_switch_get_lowest_dev(nh->nh_dev);
+ if (!dev)
+ return NULL;
+
+ if (netdev_switch_parent_id_get(dev, &psid))
+ return NULL;
+
+ if (nhsel > 0) {
+ if (prev_psid.id_len != psid.id_len)
+ return NULL;
+ if (memcmp(prev_psid.id, psid.id, psid.id_len))
+ return NULL;
+ }
+
+ prev_psid = psid;
+ }
+
+ return dev;
+}
+
+/**
+ * netdev_switch_fib_ipv4_add - Add IPv4 route entry to switch
+ *
+ * @dst: route's IPv4 destination address
+ * @dst_len: destination address length (prefix length)
+ * @fi: route FIB info structure
+ * @tos: route TOS
+ * @type: route type
+ * @nlflags: netlink flags passed in (NLM_F_*)
+ * @tb_id: route table ID
+ *
+ * Add IPv4 route entry to switch device.
+ */
+int netdev_switch_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
+ u8 tos, u8 type, u32 nlflags, u32 tb_id)
+{
+ struct net_device *dev;
+ const struct swdev_ops *ops;
+ int err = 0;
+
+ /* Don't offload route if using custom ip rules or if
+ * IPv4 FIB offloading has been disabled completely.
+ */
+
+#ifdef CONFIG_IP_MULTIPLE_TABLES
+ if (fi->fib_net->ipv4.fib_has_custom_rules)
+ return 0;
+#endif
+
+ if (fi->fib_net->ipv4.fib_offload_disabled)
+ return 0;
+
+ dev = netdev_switch_get_dev_by_nhs(fi);
+ if (!dev)
+ return 0;
+ ops = dev->swdev_ops;
+
+ if (ops->swdev_fib_ipv4_add) {
+ err = ops->swdev_fib_ipv4_add(dev, htonl(dst), dst_len,
+ fi, tos, type, nlflags,
+ tb_id);
+ if (!err)
+ fi->fib_flags |= RTNH_F_OFFLOAD;
+ }
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(netdev_switch_fib_ipv4_add);
+
+/**
+ * netdev_switch_fib_ipv4_del - Delete IPv4 route entry from switch
+ *
+ * @dst: route's IPv4 destination address
+ * @dst_len: destination address length (prefix length)
+ * @fi: route FIB info structure
+ * @tos: route TOS
+ * @type: route type
+ * @tb_id: route table ID
+ *
+ * Delete IPv4 route entry from switch device.
+ */
+int netdev_switch_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
+ u8 tos, u8 type, u32 tb_id)
+{
+ struct net_device *dev;
+ const struct swdev_ops *ops;
+ int err = 0;
+
+ if (!(fi->fib_flags & RTNH_F_OFFLOAD))
+ return 0;
+
+ dev = netdev_switch_get_dev_by_nhs(fi);
+ if (!dev)
+ return 0;
+ ops = dev->swdev_ops;
+
+ if (ops->swdev_fib_ipv4_del) {
+ err = ops->swdev_fib_ipv4_del(dev, htonl(dst), dst_len,
+ fi, tos, type, tb_id);
+ if (!err)
+ fi->fib_flags &= ~RTNH_F_OFFLOAD;
+ }
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(netdev_switch_fib_ipv4_del);
+
+/**
+ * netdev_switch_fib_ipv4_abort - Abort an IPv4 FIB operation
+ *
+ * @fi: route FIB info structure
+ */
+void netdev_switch_fib_ipv4_abort(struct fib_info *fi)
+{
+ /* There was a problem installing this route to the offload
+ * device. For now, until we come up with more refined
+ * policy handling, abruptly end IPv4 fib offloading for
+ * for entire net by flushing offload device(s) of all
+ * IPv4 routes, and mark IPv4 fib offloading broken from
+ * this point forward.
+ */
+
+ fib_flush_external(fi->fib_net);
+ fi->fib_net->ipv4.fib_offload_disabled = true;
+}
+EXPORT_SYMBOL_GPL(netdev_switch_fib_ipv4_abort);
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