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-rw-r--r--net/switchdev/switchdev.c98
1 files changed, 96 insertions, 2 deletions
diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index 81c4c0274b9b..99907d829419 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -227,6 +227,65 @@ int ndo_dflt_netdev_switch_port_bridge_dellink(struct net_device *dev,
}
EXPORT_SYMBOL(ndo_dflt_netdev_switch_port_bridge_dellink);
+static struct net_device *netdev_switch_get_lowest_dev(struct net_device *dev)
+{
+ const struct net_device_ops *ops = dev->netdev_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 ndo_switch_parent_id_get).
+ */
+
+ if (dev->features & NETIF_F_HW_SWITCH_OFFLOAD &&
+ ops->ndo_switch_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
*
@@ -242,11 +301,27 @@ EXPORT_SYMBOL(ndo_dflt_netdev_switch_port_bridge_dellink);
int netdev_switch_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
u8 tos, u8 type, u32 tb_id)
{
+ struct net_device *dev;
+ const struct net_device_ops *ops;
+ int err = 0;
+
/* Don't offload route if using custom ip rules */
if (fi->fib_net->ipv4.fib_has_custom_rules)
return 0;
- return 0;
+ dev = netdev_switch_get_dev_by_nhs(fi);
+ if (!dev)
+ return 0;
+ ops = dev->netdev_ops;
+
+ if (ops->ndo_switch_fib_ipv4_add) {
+ err = ops->ndo_switch_fib_ipv4_add(dev, htonl(dst), dst_len,
+ fi, tos, type, tb_id);
+ if (!err)
+ fi->fib_flags |= RTNH_F_EXTERNAL;
+ }
+
+ return err;
}
EXPORT_SYMBOL(netdev_switch_fib_ipv4_add);
@@ -265,6 +340,25 @@ EXPORT_SYMBOL(netdev_switch_fib_ipv4_add);
int netdev_switch_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
u8 tos, u8 type, u32 tb_id)
{
- return 0;
+ struct net_device *dev;
+ const struct net_device_ops *ops;
+ int err = 0;
+
+ if (!(fi->fib_flags & RTNH_F_EXTERNAL))
+ return 0;
+
+ dev = netdev_switch_get_dev_by_nhs(fi);
+ if (!dev)
+ return 0;
+ ops = dev->netdev_ops;
+
+ if (ops->ndo_switch_fib_ipv4_del) {
+ err = ops->ndo_switch_fib_ipv4_del(dev, htonl(dst), dst_len,
+ fi, tos, type, tb_id);
+ if (!err)
+ fi->fib_flags &= ~RTNH_F_EXTERNAL;
+ }
+
+ return err;
}
EXPORT_SYMBOL(netdev_switch_fib_ipv4_del);