Commit | Line | Data |
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c9422999 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
ccb1352e | 2 | /* |
caf2ee14 | 3 | * Copyright (c) 2007-2012 Nicira, Inc. |
ccb1352e JG |
4 | */ |
5 | ||
ccb1352e JG |
6 | #include <linux/if_vlan.h> |
7 | #include <linux/kernel.h> | |
8 | #include <linux/netdevice.h> | |
9 | #include <linux/etherdevice.h> | |
10 | #include <linux/ethtool.h> | |
11 | #include <linux/skbuff.h> | |
ccb1352e | 12 | |
7fe99e2d JG |
13 | #include <net/dst.h> |
14 | #include <net/xfrm.h> | |
5b9e7e16 | 15 | #include <net/rtnetlink.h> |
7fe99e2d | 16 | |
ccb1352e JG |
17 | #include "datapath.h" |
18 | #include "vport-internal_dev.h" | |
19 | #include "vport-netdev.h" | |
20 | ||
21 | struct internal_dev { | |
22 | struct vport *vport; | |
23 | }; | |
24 | ||
62b9c8d0 TG |
25 | static struct vport_ops ovs_internal_vport_ops; |
26 | ||
ccb1352e JG |
27 | static struct internal_dev *internal_dev_priv(struct net_device *netdev) |
28 | { | |
29 | return netdev_priv(netdev); | |
30 | } | |
31 | ||
ccb1352e | 32 | /* Called with rcu_read_lock_bh. */ |
eddf11e1 Y |
33 | static netdev_tx_t |
34 | internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) | |
ccb1352e | 35 | { |
8c876639 PS |
36 | int len, err; |
37 | ||
865e6ae0 | 38 | /* store len value because skb can be freed inside ovs_vport_receive() */ |
8c876639 | 39 | len = skb->len; |
865e6ae0 | 40 | |
ccb1352e | 41 | rcu_read_lock(); |
8c876639 | 42 | err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL); |
ccb1352e | 43 | rcu_read_unlock(); |
8c876639 | 44 | |
865e6ae0 LS |
45 | if (likely(!err)) |
46 | dev_sw_netstats_tx_add(netdev, 1, len); | |
47 | else | |
8c876639 | 48 | netdev->stats.tx_errors++; |
865e6ae0 | 49 | |
eddf11e1 | 50 | return NETDEV_TX_OK; |
ccb1352e JG |
51 | } |
52 | ||
53 | static int internal_dev_open(struct net_device *netdev) | |
54 | { | |
55 | netif_start_queue(netdev); | |
56 | return 0; | |
57 | } | |
58 | ||
59 | static int internal_dev_stop(struct net_device *netdev) | |
60 | { | |
61 | netif_stop_queue(netdev); | |
62 | return 0; | |
63 | } | |
64 | ||
65 | static void internal_dev_getinfo(struct net_device *netdev, | |
66 | struct ethtool_drvinfo *info) | |
67 | { | |
7826d43f | 68 | strlcpy(info->driver, "openvswitch", sizeof(info->driver)); |
ccb1352e JG |
69 | } |
70 | ||
71 | static const struct ethtool_ops internal_dev_ethtool_ops = { | |
72 | .get_drvinfo = internal_dev_getinfo, | |
73 | .get_link = ethtool_op_get_link, | |
74 | }; | |
75 | ||
ccb1352e JG |
76 | static void internal_dev_destructor(struct net_device *dev) |
77 | { | |
78 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
79 | ||
80 | ovs_vport_free(vport); | |
ccb1352e JG |
81 | } |
82 | ||
83 | static const struct net_device_ops internal_dev_netdev_ops = { | |
84 | .ndo_open = internal_dev_open, | |
85 | .ndo_stop = internal_dev_stop, | |
86 | .ndo_start_xmit = internal_dev_xmit, | |
9151991c | 87 | .ndo_set_mac_address = eth_mac_addr, |
865e6ae0 | 88 | .ndo_get_stats64 = dev_get_tstats64, |
ccb1352e JG |
89 | }; |
90 | ||
5b9e7e16 JP |
91 | static struct rtnl_link_ops internal_dev_link_ops __read_mostly = { |
92 | .kind = "openvswitch", | |
93 | }; | |
94 | ||
ccb1352e JG |
95 | static void do_setup(struct net_device *netdev) |
96 | { | |
97 | ether_setup(netdev); | |
98 | ||
425df17c JR |
99 | netdev->max_mtu = ETH_MAX_MTU; |
100 | ||
ccb1352e JG |
101 | netdev->netdev_ops = &internal_dev_netdev_ops; |
102 | ||
103 | netdev->priv_flags &= ~IFF_TX_SKB_SHARING; | |
3a927bc7 | 104 | netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_OPENVSWITCH | |
183dea58 | 105 | IFF_NO_QUEUE; |
cf124db5 | 106 | netdev->needs_free_netdev = true; |
9464cc37 | 107 | netdev->priv_destructor = NULL; |
7ad24ea4 | 108 | netdev->ethtool_ops = &internal_dev_ethtool_ops; |
5b9e7e16 | 109 | netdev->rtnl_link_ops = &internal_dev_link_ops; |
ccb1352e JG |
110 | |
111 | netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST | | |
f6eec614 PS |
112 | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | |
113 | NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL; | |
ccb1352e JG |
114 | |
115 | netdev->vlan_features = netdev->features; | |
f6eec614 | 116 | netdev->hw_enc_features = netdev->features; |
3145c037 | 117 | netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
ccb1352e | 118 | netdev->hw_features = netdev->features & ~NETIF_F_LLTX; |
f6eec614 | 119 | |
7ce5d222 | 120 | eth_hw_addr_random(netdev); |
ccb1352e JG |
121 | } |
122 | ||
123 | static struct vport *internal_dev_create(const struct vport_parms *parms) | |
124 | { | |
125 | struct vport *vport; | |
ccb1352e | 126 | struct internal_dev *internal_dev; |
309b6697 | 127 | struct net_device *dev; |
ccb1352e JG |
128 | int err; |
129 | ||
be4ace6e | 130 | vport = ovs_vport_alloc(0, &ovs_internal_vport_ops, parms); |
ccb1352e JG |
131 | if (IS_ERR(vport)) { |
132 | err = PTR_ERR(vport); | |
133 | goto error; | |
134 | } | |
135 | ||
309b6697 TY |
136 | dev = alloc_netdev(sizeof(struct internal_dev), |
137 | parms->name, NET_NAME_USER, do_setup); | |
138 | vport->dev = dev; | |
be4ace6e | 139 | if (!vport->dev) { |
ccb1352e JG |
140 | err = -ENOMEM; |
141 | goto error_free_vport; | |
142 | } | |
1241365f JM |
143 | vport->dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
144 | if (!vport->dev->tstats) { | |
145 | err = -ENOMEM; | |
146 | goto error_free_netdev; | |
147 | } | |
ccb1352e | 148 | |
be4ace6e TG |
149 | dev_net_set(vport->dev, ovs_dp_get_net(vport->dp)); |
150 | internal_dev = internal_dev_priv(vport->dev); | |
ccb1352e JG |
151 | internal_dev->vport = vport; |
152 | ||
46df7b81 PS |
153 | /* Restrict bridge port to current netns. */ |
154 | if (vport->port_no == OVSP_LOCAL) | |
be4ace6e | 155 | vport->dev->features |= NETIF_F_NETNS_LOCAL; |
46df7b81 | 156 | |
8e4e1713 | 157 | rtnl_lock(); |
be4ace6e | 158 | err = register_netdevice(vport->dev); |
9464cc37 | 159 | if (err) |
1241365f | 160 | goto error_unlock; |
9464cc37 | 161 | vport->dev->priv_destructor = internal_dev_destructor; |
ccb1352e | 162 | |
be4ace6e | 163 | dev_set_promiscuity(vport->dev, 1); |
8e4e1713 | 164 | rtnl_unlock(); |
be4ace6e | 165 | netif_start_queue(vport->dev); |
ccb1352e JG |
166 | |
167 | return vport; | |
168 | ||
1241365f | 169 | error_unlock: |
8e4e1713 | 170 | rtnl_unlock(); |
309b6697 | 171 | free_percpu(dev->tstats); |
1241365f | 172 | error_free_netdev: |
309b6697 | 173 | free_netdev(dev); |
ccb1352e | 174 | error_free_vport: |
9464cc37 | 175 | ovs_vport_free(vport); |
ccb1352e JG |
176 | error: |
177 | return ERR_PTR(err); | |
178 | } | |
179 | ||
180 | static void internal_dev_destroy(struct vport *vport) | |
181 | { | |
be4ace6e | 182 | netif_stop_queue(vport->dev); |
8e4e1713 | 183 | rtnl_lock(); |
be4ace6e | 184 | dev_set_promiscuity(vport->dev, -1); |
ccb1352e JG |
185 | |
186 | /* unregister_netdevice() waits for an RCU grace period. */ | |
be4ace6e | 187 | unregister_netdevice(vport->dev); |
1241365f | 188 | free_percpu(vport->dev->tstats); |
8e4e1713 | 189 | rtnl_unlock(); |
ccb1352e JG |
190 | } |
191 | ||
aec15924 | 192 | static netdev_tx_t internal_dev_recv(struct sk_buff *skb) |
ccb1352e | 193 | { |
aec15924 | 194 | struct net_device *netdev = skb->dev; |
ccb1352e | 195 | |
e1f9c356 CL |
196 | if (unlikely(!(netdev->flags & IFF_UP))) { |
197 | kfree_skb(skb); | |
8c876639 | 198 | netdev->stats.rx_dropped++; |
aec15924 | 199 | return NETDEV_TX_OK; |
e1f9c356 CL |
200 | } |
201 | ||
7fe99e2d | 202 | skb_dst_drop(skb); |
895b5c9f | 203 | nf_reset_ct(skb); |
7fe99e2d JG |
204 | secpath_reset(skb); |
205 | ||
ccb1352e JG |
206 | skb->pkt_type = PACKET_HOST; |
207 | skb->protocol = eth_type_trans(skb, netdev); | |
b34df5e8 | 208 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
e40b3727 | 209 | dev_sw_netstats_rx_add(netdev, skb->len); |
ccb1352e | 210 | |
8c876639 | 211 | netif_rx(skb); |
aec15924 | 212 | return NETDEV_TX_OK; |
ccb1352e JG |
213 | } |
214 | ||
62b9c8d0 | 215 | static struct vport_ops ovs_internal_vport_ops = { |
ccb1352e JG |
216 | .type = OVS_VPORT_TYPE_INTERNAL, |
217 | .create = internal_dev_create, | |
218 | .destroy = internal_dev_destroy, | |
ccb1352e JG |
219 | .send = internal_dev_recv, |
220 | }; | |
221 | ||
222 | int ovs_is_internal_dev(const struct net_device *netdev) | |
223 | { | |
224 | return netdev->netdev_ops == &internal_dev_netdev_ops; | |
225 | } | |
226 | ||
227 | struct vport *ovs_internal_dev_get_vport(struct net_device *netdev) | |
228 | { | |
229 | if (!ovs_is_internal_dev(netdev)) | |
230 | return NULL; | |
231 | ||
232 | return internal_dev_priv(netdev)->vport; | |
233 | } | |
5b9e7e16 JP |
234 | |
235 | int ovs_internal_dev_rtnl_link_register(void) | |
236 | { | |
62b9c8d0 TG |
237 | int err; |
238 | ||
239 | err = rtnl_link_register(&internal_dev_link_ops); | |
240 | if (err < 0) | |
241 | return err; | |
242 | ||
243 | err = ovs_vport_ops_register(&ovs_internal_vport_ops); | |
244 | if (err < 0) | |
245 | rtnl_link_unregister(&internal_dev_link_ops); | |
246 | ||
247 | return err; | |
5b9e7e16 JP |
248 | } |
249 | ||
250 | void ovs_internal_dev_rtnl_link_unregister(void) | |
251 | { | |
62b9c8d0 | 252 | ovs_vport_ops_unregister(&ovs_internal_vport_ops); |
5b9e7e16 JP |
253 | rtnl_link_unregister(&internal_dev_link_ops); |
254 | } |