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path: root/drivers/net/ipvlan/ipvlan_main.c
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Diffstat (limited to 'drivers/net/ipvlan/ipvlan_main.c')
-rw-r--r--drivers/net/ipvlan/ipvlan_main.c87
1 files changed, 80 insertions, 7 deletions
diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c
index 18b4e8c7f68a..f442eb366863 100644
--- a/drivers/net/ipvlan/ipvlan_main.c
+++ b/drivers/net/ipvlan/ipvlan_main.c
@@ -9,24 +9,87 @@
#include "ipvlan.h"
+static u32 ipvl_nf_hook_refcnt = 0;
+
+static struct nf_hook_ops ipvl_nfops[] __read_mostly = {
+ {
+ .hook = ipvlan_nf_input,
+ .pf = NFPROTO_IPV4,
+ .hooknum = NF_INET_LOCAL_IN,
+ .priority = INT_MAX,
+ },
+ {
+ .hook = ipvlan_nf_input,
+ .pf = NFPROTO_IPV6,
+ .hooknum = NF_INET_LOCAL_IN,
+ .priority = INT_MAX,
+ },
+};
+
+static struct l3mdev_ops ipvl_l3mdev_ops __read_mostly = {
+ .l3mdev_l3_rcv = ipvlan_l3_rcv,
+};
+
static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
{
ipvlan->dev->mtu = dev->mtu - ipvlan->mtu_adj;
}
-static void ipvlan_set_port_mode(struct ipvl_port *port, u16 nval)
+static int ipvlan_register_nf_hook(void)
+{
+ int err = 0;
+
+ if (!ipvl_nf_hook_refcnt) {
+ err = _nf_register_hooks(ipvl_nfops, ARRAY_SIZE(ipvl_nfops));
+ if (!err)
+ ipvl_nf_hook_refcnt = 1;
+ } else {
+ ipvl_nf_hook_refcnt++;
+ }
+
+ return err;
+}
+
+static void ipvlan_unregister_nf_hook(void)
+{
+ WARN_ON(!ipvl_nf_hook_refcnt);
+
+ ipvl_nf_hook_refcnt--;
+ if (!ipvl_nf_hook_refcnt)
+ _nf_unregister_hooks(ipvl_nfops, ARRAY_SIZE(ipvl_nfops));
+}
+
+static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval)
{
struct ipvl_dev *ipvlan;
+ struct net_device *mdev = port->dev;
+ int err = 0;
+ ASSERT_RTNL();
if (port->mode != nval) {
+ if (nval == IPVLAN_MODE_L3S) {
+ /* New mode is L3S */
+ err = ipvlan_register_nf_hook();
+ if (!err) {
+ mdev->l3mdev_ops = &ipvl_l3mdev_ops;
+ mdev->priv_flags |= IFF_L3MDEV_MASTER;
+ } else
+ return err;
+ } else if (port->mode == IPVLAN_MODE_L3S) {
+ /* Old mode was L3S */
+ mdev->priv_flags &= ~IFF_L3MDEV_MASTER;
+ ipvlan_unregister_nf_hook();
+ mdev->l3mdev_ops = NULL;
+ }
list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
- if (nval == IPVLAN_MODE_L3)
+ if (nval == IPVLAN_MODE_L3 || nval == IPVLAN_MODE_L3S)
ipvlan->dev->flags |= IFF_NOARP;
else
ipvlan->dev->flags &= ~IFF_NOARP;
}
port->mode = nval;
}
+ return err;
}
static int ipvlan_port_create(struct net_device *dev)
@@ -74,6 +137,11 @@ static void ipvlan_port_destroy(struct net_device *dev)
struct ipvl_port *port = ipvlan_port_get_rtnl(dev);
dev->priv_flags &= ~IFF_IPVLAN_MASTER;
+ if (port->mode == IPVLAN_MODE_L3S) {
+ dev->priv_flags &= ~IFF_L3MDEV_MASTER;
+ ipvlan_unregister_nf_hook();
+ dev->l3mdev_ops = NULL;
+ }
netdev_rx_handler_unregister(dev);
cancel_work_sync(&port->wq);
__skb_queue_purge(&port->backlog);
@@ -132,7 +200,8 @@ static int ipvlan_open(struct net_device *dev)
struct net_device *phy_dev = ipvlan->phy_dev;
struct ipvl_addr *addr;
- if (ipvlan->port->mode == IPVLAN_MODE_L3)
+ if (ipvlan->port->mode == IPVLAN_MODE_L3 ||
+ ipvlan->port->mode == IPVLAN_MODE_L3S)
dev->flags |= IFF_NOARP;
else
dev->flags &= ~IFF_NOARP;
@@ -372,13 +441,14 @@ static int ipvlan_nl_changelink(struct net_device *dev,
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
+ int err = 0;
if (data && data[IFLA_IPVLAN_MODE]) {
u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
- ipvlan_set_port_mode(port, nmode);
+ err = ipvlan_set_port_mode(port, nmode);
}
- return 0;
+ return err;
}
static size_t ipvlan_nl_getsize(const struct net_device *dev)
@@ -473,10 +543,13 @@ static int ipvlan_link_new(struct net *src_net, struct net_device *dev,
unregister_netdevice(dev);
return err;
}
+ err = ipvlan_set_port_mode(port, mode);
+ if (err) {
+ unregister_netdevice(dev);
+ return err;
+ }
list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans);
- ipvlan_set_port_mode(port, mode);
-
netif_stacked_transfer_operstate(phy_dev, dev);
return 0;
}