#include <linux/llc.h>
#include <linux/rtnetlink.h>
#include <linux/skbuff.h>
+#include <linux/openvswitch.h>
#include <net/llc.h>
-#include "checksum.h"
#include "datapath.h"
#include "vlan.h"
#include "vport-internal_dev.h"
#include "vport-netdev.h"
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37) && \
- !defined(HAVE_VLAN_BUG_WORKAROUND)
-#include <linux/module.h>
-
-static int vlan_tso __read_mostly;
-module_param(vlan_tso, int, 0644);
-MODULE_PARM_DESC(vlan_tso, "Enable TSO for VLAN packets");
-#else
-#define vlan_tso true
-#endif
-
static void netdev_port_receive(struct vport *vport, struct sk_buff *skb);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39)
return RX_HANDLER_CONSUMED;
}
-#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36) || \
+ defined HAVE_RHEL_OVS_HOOK
/* Called with rcu_read_lock and bottom-halves disabled. */
static struct sk_buff *netdev_frame_hook(struct sk_buff *skb)
{
return NULL;
}
-#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
/*
* Used as br_handle_frame_hook. (Cannot run bridge at the same time, even on
* different set of devices!)
netdev_port_receive((struct vport *)p, skb);
return NULL;
}
-#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
-/*
- * Used as br_handle_frame_hook. (Cannot run bridge at the same time, even on
- * different set of devices!)
- */
-/* Called with rcu_read_lock and bottom-halves disabled. */
-static int netdev_frame_hook(struct net_bridge_port *p, struct sk_buff **pskb)
-{
- netdev_port_receive((struct vport *)p, *pskb);
- return 1;
-}
#else
#error
#endif
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
-static int netdev_init(void) { return 0; }
-static void netdev_exit(void) { }
-#else
-static int netdev_init(void)
+static struct net_device *get_dpdev(struct datapath *dp)
{
- /* Hook into callback used by the bridge to intercept packets.
- * Parasites we are. */
- br_handle_frame_hook = netdev_frame_hook;
-
- return 0;
-}
+ struct vport *local;
-static void netdev_exit(void)
-{
- br_handle_frame_hook = NULL;
+ local = ovs_vport_ovsl(dp, OVSP_LOCAL);
+ BUG_ON(!local);
+ return netdev_vport_priv(local)->dev;
}
-#endif
static struct vport *netdev_create(const struct vport_parms *parms)
{
goto error_put;
}
+ rtnl_lock();
+ err = netdev_master_upper_dev_link(netdev_vport->dev,
+ get_dpdev(vport->dp));
+ if (err)
+ goto error_unlock;
+
err = netdev_rx_handler_register(netdev_vport->dev, netdev_frame_hook,
vport);
if (err)
- goto error_put;
+ goto error_master_upper_dev_unlink;
dev_set_promiscuity(netdev_vport->dev, 1);
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
- dev_disable_lro(netdev_vport->dev);
-#endif
netdev_vport->dev->priv_flags |= IFF_OVS_DATAPATH;
+ rtnl_unlock();
return vport;
+error_master_upper_dev_unlink:
+ netdev_upper_dev_unlink(netdev_vport->dev, get_dpdev(vport->dp));
+error_unlock:
+ rtnl_unlock();
error_put:
dev_put(netdev_vport->dev);
error_free_vport:
return ERR_PTR(err);
}
-static void netdev_destroy(struct vport *vport)
+static void free_port_rcu(struct rcu_head *rcu)
+{
+ struct netdev_vport *netdev_vport = container_of(rcu,
+ struct netdev_vport, rcu);
+
+ dev_put(netdev_vport->dev);
+ ovs_vport_free(vport_from_priv(netdev_vport));
+}
+
+void ovs_netdev_detach_dev(struct vport *vport)
{
struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
+ ASSERT_RTNL();
netdev_vport->dev->priv_flags &= ~IFF_OVS_DATAPATH;
netdev_rx_handler_unregister(netdev_vport->dev);
+ netdev_upper_dev_unlink(netdev_vport->dev,
+ netdev_master_upper_dev_get(netdev_vport->dev));
dev_set_promiscuity(netdev_vport->dev, -1);
-
- synchronize_rcu();
-
- dev_put(netdev_vport->dev);
- ovs_vport_free(vport);
}
-int ovs_netdev_set_addr(struct vport *vport, const unsigned char *addr)
+static void netdev_destroy(struct vport *vport)
{
struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
- struct sockaddr sa;
- sa.sa_family = ARPHRD_ETHER;
- memcpy(sa.sa_data, addr, ETH_ALEN);
+ rtnl_lock();
+ if (ovs_netdev_get_vport(netdev_vport->dev))
+ ovs_netdev_detach_dev(vport);
+ rtnl_unlock();
- return dev_set_mac_address(netdev_vport->dev, &sa);
+ call_rcu(&netdev_vport->rcu, free_port_rcu);
}
const char *ovs_netdev_get_name(const struct vport *vport)
return netdev_vport->dev->name;
}
-const unsigned char *ovs_netdev_get_addr(const struct vport *vport)
-{
- const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
- return netdev_vport->dev->dev_addr;
-}
-
-struct kobject *ovs_netdev_get_kobj(const struct vport *vport)
-{
- const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
- return &netdev_vport->dev->NETDEV_DEV_MEMBER.kobj;
-}
-
-unsigned ovs_netdev_get_dev_flags(const struct vport *vport)
-{
- const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
- return dev_get_flags(netdev_vport->dev);
-}
-
-int ovs_netdev_is_running(const struct vport *vport)
-{
- const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
- return netif_running(netdev_vport->dev);
-}
-
-unsigned char ovs_netdev_get_operstate(const struct vport *vport)
-{
- const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
- return netdev_vport->dev->operstate;
-}
-
-int ovs_netdev_get_ifindex(const struct vport *vport)
-{
- const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
- return netdev_vport->dev->ifindex;
-}
-
-int ovs_netdev_get_mtu(const struct vport *vport)
-{
- const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
- return netdev_vport->dev->mtu;
-}
-
/* Must be called with rcu_read_lock. */
static void netdev_port_receive(struct vport *vport, struct sk_buff *skb)
{
- if (unlikely(!vport)) {
- kfree_skb(skb);
- return;
- }
+ if (unlikely(!vport))
+ goto error;
+
+ if (unlikely(skb_warn_if_lro(skb)))
+ goto error;
/* Make our own copy of the packet. Otherwise we will mangle the
* packet for anyone who came before us (e.g. tcpdump via AF_PACKET).
return;
skb_push(skb, ETH_HLEN);
+ ovs_skb_postpush_rcsum(skb, skb->data, ETH_HLEN);
- if (unlikely(compute_ip_summed(skb, false))) {
- kfree_skb(skb);
- return;
- }
- vlan_copy_skb_tci(skb);
+ ovs_vport_receive(vport, skb, NULL);
+ return;
- ovs_vport_receive(vport, skb);
+error:
+ kfree_skb(skb);
}
-static unsigned packet_length(const struct sk_buff *skb)
+static unsigned int packet_length(const struct sk_buff *skb)
{
- unsigned length = skb->len - ETH_HLEN;
+ unsigned int length = skb->len - ETH_HLEN;
if (skb->protocol == htons(ETH_P_8021Q))
length -= VLAN_HLEN;
return length;
}
-static bool dev_supports_vlan_tx(struct net_device *dev)
-{
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)
- /* Software fallback means every device supports vlan_tci on TX. */
- return true;
-#elif defined(HAVE_VLAN_BUG_WORKAROUND)
- return dev->features & NETIF_F_HW_VLAN_TX;
-#else
- /* Assume that the driver is buggy. */
- return false;
-#endif
-}
-
static int netdev_send(struct vport *vport, struct sk_buff *skb)
{
struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
int len;
if (unlikely(packet_length(skb) > mtu && !skb_is_gso(skb))) {
- if (net_ratelimit())
- pr_warn("%s: dropped over-mtu packet: %d > %d\n",
- ovs_dp_name(vport->dp), packet_length(skb), mtu);
- goto error;
+ net_warn_ratelimited("%s: dropped over-mtu packet: %d > %d\n",
+ netdev_vport->dev->name,
+ packet_length(skb), mtu);
+ goto drop;
}
- if (unlikely(skb_warn_if_lro(skb)))
- goto error;
-
skb->dev = netdev_vport->dev;
- forward_ip_summed(skb, true);
-
- if (vlan_tx_tag_present(skb) && !dev_supports_vlan_tx(skb->dev)) {
- int features;
-
- features = netif_skb_features(skb);
-
- if (!vlan_tso)
- features &= ~(NETIF_F_TSO | NETIF_F_TSO6 |
- NETIF_F_UFO | NETIF_F_FSO);
-
- if (netif_needs_gso(skb, features)) {
- struct sk_buff *nskb;
-
- nskb = skb_gso_segment(skb, features);
- if (!nskb) {
- if (unlikely(skb_cloned(skb) &&
- pskb_expand_head(skb, 0, 0, GFP_ATOMIC))) {
- kfree_skb(skb);
- return 0;
- }
-
- skb_shinfo(skb)->gso_type &= ~SKB_GSO_DODGY;
- goto tag;
- }
-
- if (IS_ERR(nskb)) {
- kfree_skb(skb);
- return 0;
- }
- consume_skb(skb);
- skb = nskb;
-
- len = 0;
- do {
- nskb = skb->next;
- skb->next = NULL;
-
- skb = __vlan_put_tag(skb, vlan_tx_tag_get(skb));
- if (likely(skb)) {
- len += skb->len;
- vlan_set_tci(skb, 0);
- dev_queue_xmit(skb);
- }
-
- skb = nskb;
- } while (skb);
-
- return len;
- }
-
-tag:
- skb = __vlan_put_tag(skb, vlan_tx_tag_get(skb));
- if (unlikely(!skb))
- return 0;
- vlan_set_tci(skb, 0);
- }
-
len = skb->len;
dev_queue_xmit(skb);
return len;
-error:
+drop:
kfree_skb(skb);
- ovs_vport_record_error(vport, VPORT_E_TX_DROPPED);
return 0;
}
/* Returns null if this device is not attached to a datapath. */
struct vport *ovs_netdev_get_vport(struct net_device *dev)
{
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36) || \
+ defined HAVE_RHEL_OVS_HOOK
#if IFF_OVS_DATAPATH != 0
if (likely(dev->priv_flags & IFF_OVS_DATAPATH))
#else
if (likely(rcu_access_pointer(dev->rx_handler) == netdev_frame_hook))
#endif
+#ifdef HAVE_RHEL_OVS_HOOK
+ return (struct vport *)rcu_dereference_rtnl(dev->ax25_ptr);
+#else
return (struct vport *)rcu_dereference_rtnl(dev->rx_handler_data);
+#endif
else
return NULL;
#else
const struct vport_ops ovs_netdev_vport_ops = {
.type = OVS_VPORT_TYPE_NETDEV,
- .flags = VPORT_F_REQUIRED,
- .init = netdev_init,
- .exit = netdev_exit,
.create = netdev_create,
.destroy = netdev_destroy,
- .set_addr = ovs_netdev_set_addr,
.get_name = ovs_netdev_get_name,
- .get_addr = ovs_netdev_get_addr,
- .get_kobj = ovs_netdev_get_kobj,
- .get_dev_flags = ovs_netdev_get_dev_flags,
- .is_running = ovs_netdev_is_running,
- .get_operstate = ovs_netdev_get_operstate,
- .get_ifindex = ovs_netdev_get_ifindex,
- .get_mtu = ovs_netdev_get_mtu,
.send = netdev_send,
};
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36) && \
+ !defined HAVE_RHEL_OVS_HOOK
/*
- * In kernels earlier than 2.6.36, Open vSwitch cannot safely coexist with the
- * Linux bridge module, because there is only a single bridge hook function and
- * only a single br_port member in struct net_device, so this prevents loading
- * both bridge and openvswitch at the same time.
+ * Enforces, mutual exclusion with the Linux bridge module, by declaring and
+ * exporting br_should_route_hook. Because the bridge module also exports the
+ * same symbol, the module loader will refuse to load both modules at the same
+ * time (e.g. "bridge: exports duplicate symbol br_should_route_hook (owned by
+ * openvswitch)").
+ *
+ * Before Linux 2.6.36, Open vSwitch cannot safely coexist with the Linux
+ * bridge module, so openvswitch uses this macro in those versions. In
+ * Linux 2.6.36 and later, Open vSwitch can coexist with the bridge module.
+ *
+ * The use of "typeof" here avoids the need to track changes in the type of
+ * br_should_route_hook over various kernel versions.
*/
-BRIDGE_MUTUAL_EXCLUSION;
+typeof(br_should_route_hook) br_should_route_hook;
+EXPORT_SYMBOL(br_should_route_hook);
#endif
git://git.onelab.eu / sliver-openvswitch.git / blobdiff