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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /net/openvswitch/vport-netdev.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'net/openvswitch/vport-netdev.c')
-rw-r--r--net/openvswitch/vport-netdev.c209
1 files changed, 209 insertions, 0 deletions
diff --git a/net/openvswitch/vport-netdev.c b/net/openvswitch/vport-netdev.c
new file mode 100644
index 000000000..2f61d5bdc
--- /dev/null
+++ b/net/openvswitch/vport-netdev.c
@@ -0,0 +1,209 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2007-2012 Nicira, Inc.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/if_arp.h>
+#include <linux/if_bridge.h>
+#include <linux/if_vlan.h>
+#include <linux/kernel.h>
+#include <linux/llc.h>
+#include <linux/rtnetlink.h>
+#include <linux/skbuff.h>
+#include <linux/openvswitch.h>
+#include <linux/export.h>
+
+#include <net/ip_tunnels.h>
+#include <net/rtnetlink.h>
+
+#include "datapath.h"
+#include "vport.h"
+#include "vport-internal_dev.h"
+#include "vport-netdev.h"
+
+static struct vport_ops ovs_netdev_vport_ops;
+
+/* Must be called with rcu_read_lock. */
+static void netdev_port_receive(struct sk_buff *skb)
+{
+ struct vport *vport;
+
+ vport = ovs_netdev_get_vport(skb->dev);
+ 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).
+ */
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (unlikely(!skb))
+ return;
+
+ if (skb->dev->type == ARPHRD_ETHER)
+ skb_push_rcsum(skb, ETH_HLEN);
+
+ ovs_vport_receive(vport, skb, skb_tunnel_info(skb));
+ return;
+error:
+ kfree_skb(skb);
+}
+
+/* Called with rcu_read_lock and bottom-halves disabled. */
+static rx_handler_result_t netdev_frame_hook(struct sk_buff **pskb)
+{
+ struct sk_buff *skb = *pskb;
+
+ if (unlikely(skb->pkt_type == PACKET_LOOPBACK))
+ return RX_HANDLER_PASS;
+
+ netdev_port_receive(skb);
+ return RX_HANDLER_CONSUMED;
+}
+
+static struct net_device *get_dpdev(const struct datapath *dp)
+{
+ struct vport *local;
+
+ local = ovs_vport_ovsl(dp, OVSP_LOCAL);
+ return local->dev;
+}
+
+struct vport *ovs_netdev_link(struct vport *vport, const char *name)
+{
+ int err;
+
+ vport->dev = dev_get_by_name(ovs_dp_get_net(vport->dp), name);
+ if (!vport->dev) {
+ err = -ENODEV;
+ goto error_free_vport;
+ }
+ netdev_tracker_alloc(vport->dev, &vport->dev_tracker, GFP_KERNEL);
+ if (vport->dev->flags & IFF_LOOPBACK ||
+ (vport->dev->type != ARPHRD_ETHER &&
+ vport->dev->type != ARPHRD_NONE) ||
+ ovs_is_internal_dev(vport->dev)) {
+ err = -EINVAL;
+ goto error_put;
+ }
+
+ rtnl_lock();
+ err = netdev_master_upper_dev_link(vport->dev,
+ get_dpdev(vport->dp),
+ NULL, NULL, NULL);
+ if (err)
+ goto error_unlock;
+
+ err = netdev_rx_handler_register(vport->dev, netdev_frame_hook,
+ vport);
+ if (err)
+ goto error_master_upper_dev_unlink;
+
+ dev_disable_lro(vport->dev);
+ dev_set_promiscuity(vport->dev, 1);
+ vport->dev->priv_flags |= IFF_OVS_DATAPATH;
+ rtnl_unlock();
+
+ return vport;
+
+error_master_upper_dev_unlink:
+ netdev_upper_dev_unlink(vport->dev, get_dpdev(vport->dp));
+error_unlock:
+ rtnl_unlock();
+error_put:
+ netdev_put(vport->dev, &vport->dev_tracker);
+error_free_vport:
+ ovs_vport_free(vport);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(ovs_netdev_link);
+
+static struct vport *netdev_create(const struct vport_parms *parms)
+{
+ struct vport *vport;
+
+ vport = ovs_vport_alloc(0, &ovs_netdev_vport_ops, parms);
+ if (IS_ERR(vport))
+ return vport;
+
+ return ovs_netdev_link(vport, parms->name);
+}
+
+static void vport_netdev_free(struct rcu_head *rcu)
+{
+ struct vport *vport = container_of(rcu, struct vport, rcu);
+
+ netdev_put(vport->dev, &vport->dev_tracker);
+ ovs_vport_free(vport);
+}
+
+void ovs_netdev_detach_dev(struct vport *vport)
+{
+ ASSERT_RTNL();
+ vport->dev->priv_flags &= ~IFF_OVS_DATAPATH;
+ netdev_rx_handler_unregister(vport->dev);
+ netdev_upper_dev_unlink(vport->dev,
+ netdev_master_upper_dev_get(vport->dev));
+ dev_set_promiscuity(vport->dev, -1);
+}
+
+static void netdev_destroy(struct vport *vport)
+{
+ rtnl_lock();
+ if (netif_is_ovs_port(vport->dev))
+ ovs_netdev_detach_dev(vport);
+ rtnl_unlock();
+
+ call_rcu(&vport->rcu, vport_netdev_free);
+}
+
+void ovs_netdev_tunnel_destroy(struct vport *vport)
+{
+ rtnl_lock();
+ if (netif_is_ovs_port(vport->dev))
+ ovs_netdev_detach_dev(vport);
+
+ /* We can be invoked by both explicit vport deletion and
+ * underlying netdev deregistration; delete the link only
+ * if it's not already shutting down.
+ */
+ if (vport->dev->reg_state == NETREG_REGISTERED)
+ rtnl_delete_link(vport->dev);
+ netdev_put(vport->dev, &vport->dev_tracker);
+ vport->dev = NULL;
+ rtnl_unlock();
+
+ call_rcu(&vport->rcu, vport_netdev_free);
+}
+EXPORT_SYMBOL_GPL(ovs_netdev_tunnel_destroy);
+
+/* Returns null if this device is not attached to a datapath. */
+struct vport *ovs_netdev_get_vport(struct net_device *dev)
+{
+ if (likely(netif_is_ovs_port(dev)))
+ return (struct vport *)
+ rcu_dereference_rtnl(dev->rx_handler_data);
+ else
+ return NULL;
+}
+
+static struct vport_ops ovs_netdev_vport_ops = {
+ .type = OVS_VPORT_TYPE_NETDEV,
+ .create = netdev_create,
+ .destroy = netdev_destroy,
+ .send = dev_queue_xmit,
+};
+
+int __init ovs_netdev_init(void)
+{
+ return ovs_vport_ops_register(&ovs_netdev_vport_ops);
+}
+
+void ovs_netdev_exit(void)
+{
+ ovs_vport_ops_unregister(&ovs_netdev_vport_ops);
+}