cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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vport-geneve.c (2999B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * Copyright (c) 2014 Nicira, Inc.
      4 */
      5
      6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
      7
      8#include <linux/in.h>
      9#include <linux/ip.h>
     10#include <linux/net.h>
     11#include <linux/rculist.h>
     12#include <linux/udp.h>
     13#include <linux/if_vlan.h>
     14#include <linux/module.h>
     15
     16#include <net/geneve.h>
     17#include <net/icmp.h>
     18#include <net/ip.h>
     19#include <net/route.h>
     20#include <net/udp.h>
     21#include <net/xfrm.h>
     22
     23#include "datapath.h"
     24#include "vport.h"
     25#include "vport-netdev.h"
     26
     27static struct vport_ops ovs_geneve_vport_ops;
     28/**
     29 * struct geneve_port - Keeps track of open UDP ports
     30 * @dst_port: destination port.
     31 */
     32struct geneve_port {
     33	u16 dst_port;
     34};
     35
     36static inline struct geneve_port *geneve_vport(const struct vport *vport)
     37{
     38	return vport_priv(vport);
     39}
     40
     41static int geneve_get_options(const struct vport *vport,
     42			      struct sk_buff *skb)
     43{
     44	struct geneve_port *geneve_port = geneve_vport(vport);
     45
     46	if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, geneve_port->dst_port))
     47		return -EMSGSIZE;
     48	return 0;
     49}
     50
     51static struct vport *geneve_tnl_create(const struct vport_parms *parms)
     52{
     53	struct net *net = ovs_dp_get_net(parms->dp);
     54	struct nlattr *options = parms->options;
     55	struct geneve_port *geneve_port;
     56	struct net_device *dev;
     57	struct vport *vport;
     58	struct nlattr *a;
     59	u16 dst_port;
     60	int err;
     61
     62	if (!options) {
     63		err = -EINVAL;
     64		goto error;
     65	}
     66
     67	a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
     68	if (a && nla_len(a) == sizeof(u16)) {
     69		dst_port = nla_get_u16(a);
     70	} else {
     71		/* Require destination port from userspace. */
     72		err = -EINVAL;
     73		goto error;
     74	}
     75
     76	vport = ovs_vport_alloc(sizeof(struct geneve_port),
     77				&ovs_geneve_vport_ops, parms);
     78	if (IS_ERR(vport))
     79		return vport;
     80
     81	geneve_port = geneve_vport(vport);
     82	geneve_port->dst_port = dst_port;
     83
     84	rtnl_lock();
     85	dev = geneve_dev_create_fb(net, parms->name, NET_NAME_USER, dst_port);
     86	if (IS_ERR(dev)) {
     87		rtnl_unlock();
     88		ovs_vport_free(vport);
     89		return ERR_CAST(dev);
     90	}
     91
     92	err = dev_change_flags(dev, dev->flags | IFF_UP, NULL);
     93	if (err < 0) {
     94		rtnl_delete_link(dev);
     95		rtnl_unlock();
     96		ovs_vport_free(vport);
     97		goto error;
     98	}
     99
    100	rtnl_unlock();
    101	return vport;
    102error:
    103	return ERR_PTR(err);
    104}
    105
    106static struct vport *geneve_create(const struct vport_parms *parms)
    107{
    108	struct vport *vport;
    109
    110	vport = geneve_tnl_create(parms);
    111	if (IS_ERR(vport))
    112		return vport;
    113
    114	return ovs_netdev_link(vport, parms->name);
    115}
    116
    117static struct vport_ops ovs_geneve_vport_ops = {
    118	.type		= OVS_VPORT_TYPE_GENEVE,
    119	.create		= geneve_create,
    120	.destroy	= ovs_netdev_tunnel_destroy,
    121	.get_options	= geneve_get_options,
    122	.send		= dev_queue_xmit,
    123};
    124
    125static int __init ovs_geneve_tnl_init(void)
    126{
    127	return ovs_vport_ops_register(&ovs_geneve_vport_ops);
    128}
    129
    130static void __exit ovs_geneve_tnl_exit(void)
    131{
    132	ovs_vport_ops_unregister(&ovs_geneve_vport_ops);
    133}
    134
    135module_init(ovs_geneve_tnl_init);
    136module_exit(ovs_geneve_tnl_exit);
    137
    138MODULE_DESCRIPTION("OVS: Geneve switching port");
    139MODULE_LICENSE("GPL");
    140MODULE_ALIAS("vport-type-5");