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c9422999 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
dcc38c03 TG |
2 | /* |
3 | * Copyright (c) 2014 Nicira, Inc. | |
4 | * Copyright (c) 2013 Cisco Systems, Inc. | |
dcc38c03 TG |
5 | */ |
6 | ||
7 | #include <linux/kernel.h> | |
8 | #include <linux/skbuff.h> | |
9 | #include <linux/openvswitch.h> | |
10 | #include <linux/module.h> | |
11 | #include <net/udp.h> | |
12 | #include <net/ip_tunnels.h> | |
13 | #include <net/rtnetlink.h> | |
14 | #include <net/vxlan.h> | |
15 | ||
16 | #include "datapath.h" | |
17 | #include "vport.h" | |
18 | #include "vport-netdev.h" | |
19 | ||
20 | static struct vport_ops ovs_vxlan_netdev_vport_ops; | |
21 | ||
22 | static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb) | |
23 | { | |
24 | struct vxlan_dev *vxlan = netdev_priv(vport->dev); | |
25 | __be16 dst_port = vxlan->cfg.dst_port; | |
26 | ||
27 | if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port))) | |
28 | return -EMSGSIZE; | |
29 | ||
dc5321d7 | 30 | if (vxlan->cfg.flags & VXLAN_F_GBP) { |
dcc38c03 TG |
31 | struct nlattr *exts; |
32 | ||
ae0be8de | 33 | exts = nla_nest_start_noflag(skb, OVS_TUNNEL_ATTR_EXTENSION); |
dcc38c03 TG |
34 | if (!exts) |
35 | return -EMSGSIZE; | |
36 | ||
dc5321d7 | 37 | if (vxlan->cfg.flags & VXLAN_F_GBP && |
dcc38c03 TG |
38 | nla_put_flag(skb, OVS_VXLAN_EXT_GBP)) |
39 | return -EMSGSIZE; | |
40 | ||
41 | nla_nest_end(skb, exts); | |
42 | } | |
43 | ||
44 | return 0; | |
45 | } | |
46 | ||
47 | static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = { | |
48 | [OVS_VXLAN_EXT_GBP] = { .type = NLA_FLAG, }, | |
49 | }; | |
50 | ||
51 | static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr, | |
52 | struct vxlan_config *conf) | |
53 | { | |
54 | struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1]; | |
55 | int err; | |
56 | ||
57 | if (nla_len(attr) < sizeof(struct nlattr)) | |
58 | return -EINVAL; | |
59 | ||
8cb08174 JB |
60 | err = nla_parse_nested_deprecated(exts, OVS_VXLAN_EXT_MAX, attr, |
61 | exts_policy, NULL); | |
dcc38c03 TG |
62 | if (err < 0) |
63 | return err; | |
64 | ||
65 | if (exts[OVS_VXLAN_EXT_GBP]) | |
66 | conf->flags |= VXLAN_F_GBP; | |
67 | ||
68 | return 0; | |
69 | } | |
70 | ||
71 | static struct vport *vxlan_tnl_create(const struct vport_parms *parms) | |
72 | { | |
73 | struct net *net = ovs_dp_get_net(parms->dp); | |
74 | struct nlattr *options = parms->options; | |
75 | struct net_device *dev; | |
76 | struct vport *vport; | |
77 | struct nlattr *a; | |
78 | int err; | |
79 | struct vxlan_config conf = { | |
80 | .no_share = true, | |
c868ee70 | 81 | .flags = VXLAN_F_COLLECT_METADATA | VXLAN_F_UDP_ZERO_CSUM6_RX, |
7e059158 DW |
82 | /* Don't restrict the packets that can be sent by MTU */ |
83 | .mtu = IP_MAX_MTU, | |
dcc38c03 TG |
84 | }; |
85 | ||
86 | if (!options) { | |
87 | err = -EINVAL; | |
88 | goto error; | |
89 | } | |
90 | ||
91 | a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT); | |
92 | if (a && nla_len(a) == sizeof(u16)) { | |
93 | conf.dst_port = htons(nla_get_u16(a)); | |
94 | } else { | |
95 | /* Require destination port from userspace. */ | |
96 | err = -EINVAL; | |
97 | goto error; | |
98 | } | |
99 | ||
100 | vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms); | |
101 | if (IS_ERR(vport)) | |
102 | return vport; | |
103 | ||
104 | a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION); | |
105 | if (a) { | |
106 | err = vxlan_configure_exts(vport, a, &conf); | |
107 | if (err) { | |
108 | ovs_vport_free(vport); | |
109 | goto error; | |
110 | } | |
111 | } | |
112 | ||
113 | rtnl_lock(); | |
114 | dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf); | |
115 | if (IS_ERR(dev)) { | |
116 | rtnl_unlock(); | |
117 | ovs_vport_free(vport); | |
118 | return ERR_CAST(dev); | |
119 | } | |
120 | ||
567c5e13 | 121 | err = dev_change_flags(dev, dev->flags | IFF_UP, NULL); |
4b5b9ba5 MP |
122 | if (err < 0) { |
123 | rtnl_delete_link(dev); | |
124 | rtnl_unlock(); | |
125 | ovs_vport_free(vport); | |
126 | goto error; | |
127 | } | |
128 | ||
dcc38c03 TG |
129 | rtnl_unlock(); |
130 | return vport; | |
131 | error: | |
132 | return ERR_PTR(err); | |
133 | } | |
134 | ||
135 | static struct vport *vxlan_create(const struct vport_parms *parms) | |
136 | { | |
137 | struct vport *vport; | |
138 | ||
139 | vport = vxlan_tnl_create(parms); | |
140 | if (IS_ERR(vport)) | |
141 | return vport; | |
142 | ||
143 | return ovs_netdev_link(vport, parms->name); | |
144 | } | |
145 | ||
dcc38c03 TG |
146 | static struct vport_ops ovs_vxlan_netdev_vport_ops = { |
147 | .type = OVS_VPORT_TYPE_VXLAN, | |
148 | .create = vxlan_create, | |
a9020fde | 149 | .destroy = ovs_netdev_tunnel_destroy, |
dcc38c03 | 150 | .get_options = vxlan_get_options, |
aec15924 | 151 | .send = dev_queue_xmit, |
dcc38c03 TG |
152 | }; |
153 | ||
154 | static int __init ovs_vxlan_tnl_init(void) | |
155 | { | |
156 | return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops); | |
157 | } | |
158 | ||
159 | static void __exit ovs_vxlan_tnl_exit(void) | |
160 | { | |
161 | ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops); | |
162 | } | |
163 | ||
164 | module_init(ovs_vxlan_tnl_init); | |
165 | module_exit(ovs_vxlan_tnl_exit); | |
166 | ||
167 | MODULE_DESCRIPTION("OVS: VXLAN switching port"); | |
168 | MODULE_LICENSE("GPL"); | |
169 | MODULE_ALIAS("vport-type-4"); |