Commit | Line | Data |
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ccb1352e | 1 | /* |
caf2ee14 | 2 | * Copyright (c) 2007-2012 Nicira, Inc. |
ccb1352e JG |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
17 | */ | |
18 | ||
19 | #include <linux/hardirq.h> | |
20 | #include <linux/if_vlan.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/netdevice.h> | |
23 | #include <linux/etherdevice.h> | |
24 | #include <linux/ethtool.h> | |
25 | #include <linux/skbuff.h> | |
ccb1352e | 26 | |
7fe99e2d JG |
27 | #include <net/dst.h> |
28 | #include <net/xfrm.h> | |
29 | ||
ccb1352e JG |
30 | #include "datapath.h" |
31 | #include "vport-internal_dev.h" | |
32 | #include "vport-netdev.h" | |
33 | ||
34 | struct internal_dev { | |
35 | struct vport *vport; | |
36 | }; | |
37 | ||
38 | static struct internal_dev *internal_dev_priv(struct net_device *netdev) | |
39 | { | |
40 | return netdev_priv(netdev); | |
41 | } | |
42 | ||
43 | /* This function is only called by the kernel network layer.*/ | |
44 | static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev, | |
45 | struct rtnl_link_stats64 *stats) | |
46 | { | |
47 | struct vport *vport = ovs_internal_dev_get_vport(netdev); | |
48 | struct ovs_vport_stats vport_stats; | |
49 | ||
50 | ovs_vport_get_stats(vport, &vport_stats); | |
51 | ||
52 | /* The tx and rx stats need to be swapped because the | |
53 | * switch and host OS have opposite perspectives. */ | |
54 | stats->rx_packets = vport_stats.tx_packets; | |
55 | stats->tx_packets = vport_stats.rx_packets; | |
56 | stats->rx_bytes = vport_stats.tx_bytes; | |
57 | stats->tx_bytes = vport_stats.rx_bytes; | |
58 | stats->rx_errors = vport_stats.tx_errors; | |
59 | stats->tx_errors = vport_stats.rx_errors; | |
60 | stats->rx_dropped = vport_stats.tx_dropped; | |
61 | stats->tx_dropped = vport_stats.rx_dropped; | |
62 | ||
63 | return stats; | |
64 | } | |
65 | ||
ccb1352e JG |
66 | /* Called with rcu_read_lock_bh. */ |
67 | static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) | |
68 | { | |
69 | rcu_read_lock(); | |
7d5437c7 | 70 | ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL); |
ccb1352e JG |
71 | rcu_read_unlock(); |
72 | return 0; | |
73 | } | |
74 | ||
75 | static int internal_dev_open(struct net_device *netdev) | |
76 | { | |
77 | netif_start_queue(netdev); | |
78 | return 0; | |
79 | } | |
80 | ||
81 | static int internal_dev_stop(struct net_device *netdev) | |
82 | { | |
83 | netif_stop_queue(netdev); | |
84 | return 0; | |
85 | } | |
86 | ||
87 | static void internal_dev_getinfo(struct net_device *netdev, | |
88 | struct ethtool_drvinfo *info) | |
89 | { | |
7826d43f | 90 | strlcpy(info->driver, "openvswitch", sizeof(info->driver)); |
ccb1352e JG |
91 | } |
92 | ||
93 | static const struct ethtool_ops internal_dev_ethtool_ops = { | |
94 | .get_drvinfo = internal_dev_getinfo, | |
95 | .get_link = ethtool_op_get_link, | |
96 | }; | |
97 | ||
98 | static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu) | |
99 | { | |
100 | if (new_mtu < 68) | |
101 | return -EINVAL; | |
102 | ||
103 | netdev->mtu = new_mtu; | |
104 | return 0; | |
105 | } | |
106 | ||
107 | static void internal_dev_destructor(struct net_device *dev) | |
108 | { | |
109 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
110 | ||
111 | ovs_vport_free(vport); | |
112 | free_netdev(dev); | |
113 | } | |
114 | ||
115 | static const struct net_device_ops internal_dev_netdev_ops = { | |
116 | .ndo_open = internal_dev_open, | |
117 | .ndo_stop = internal_dev_stop, | |
118 | .ndo_start_xmit = internal_dev_xmit, | |
9151991c | 119 | .ndo_set_mac_address = eth_mac_addr, |
ccb1352e JG |
120 | .ndo_change_mtu = internal_dev_change_mtu, |
121 | .ndo_get_stats64 = internal_dev_get_stats, | |
122 | }; | |
123 | ||
124 | static void do_setup(struct net_device *netdev) | |
125 | { | |
126 | ether_setup(netdev); | |
127 | ||
128 | netdev->netdev_ops = &internal_dev_netdev_ops; | |
129 | ||
130 | netdev->priv_flags &= ~IFF_TX_SKB_SHARING; | |
9151991c | 131 | netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
ccb1352e JG |
132 | netdev->destructor = internal_dev_destructor; |
133 | SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops); | |
134 | netdev->tx_queue_len = 0; | |
135 | ||
136 | netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST | | |
46df7b81 | 137 | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO; |
ccb1352e JG |
138 | |
139 | netdev->vlan_features = netdev->features; | |
f646968f | 140 | netdev->features |= NETIF_F_HW_VLAN_CTAG_TX; |
ccb1352e | 141 | netdev->hw_features = netdev->features & ~NETIF_F_LLTX; |
7ce5d222 | 142 | eth_hw_addr_random(netdev); |
ccb1352e JG |
143 | } |
144 | ||
145 | static struct vport *internal_dev_create(const struct vport_parms *parms) | |
146 | { | |
147 | struct vport *vport; | |
148 | struct netdev_vport *netdev_vport; | |
149 | struct internal_dev *internal_dev; | |
150 | int err; | |
151 | ||
152 | vport = ovs_vport_alloc(sizeof(struct netdev_vport), | |
153 | &ovs_internal_vport_ops, parms); | |
154 | if (IS_ERR(vport)) { | |
155 | err = PTR_ERR(vport); | |
156 | goto error; | |
157 | } | |
158 | ||
159 | netdev_vport = netdev_vport_priv(vport); | |
160 | ||
161 | netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev), | |
162 | parms->name, do_setup); | |
163 | if (!netdev_vport->dev) { | |
164 | err = -ENOMEM; | |
165 | goto error_free_vport; | |
166 | } | |
167 | ||
46df7b81 | 168 | dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp)); |
ccb1352e JG |
169 | internal_dev = internal_dev_priv(netdev_vport->dev); |
170 | internal_dev->vport = vport; | |
171 | ||
46df7b81 PS |
172 | /* Restrict bridge port to current netns. */ |
173 | if (vport->port_no == OVSP_LOCAL) | |
174 | netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL; | |
175 | ||
8e4e1713 | 176 | rtnl_lock(); |
ccb1352e JG |
177 | err = register_netdevice(netdev_vport->dev); |
178 | if (err) | |
179 | goto error_free_netdev; | |
180 | ||
181 | dev_set_promiscuity(netdev_vport->dev, 1); | |
8e4e1713 | 182 | rtnl_unlock(); |
ccb1352e JG |
183 | netif_start_queue(netdev_vport->dev); |
184 | ||
185 | return vport; | |
186 | ||
187 | error_free_netdev: | |
8e4e1713 | 188 | rtnl_unlock(); |
ccb1352e JG |
189 | free_netdev(netdev_vport->dev); |
190 | error_free_vport: | |
191 | ovs_vport_free(vport); | |
192 | error: | |
193 | return ERR_PTR(err); | |
194 | } | |
195 | ||
196 | static void internal_dev_destroy(struct vport *vport) | |
197 | { | |
198 | struct netdev_vport *netdev_vport = netdev_vport_priv(vport); | |
199 | ||
200 | netif_stop_queue(netdev_vport->dev); | |
8e4e1713 | 201 | rtnl_lock(); |
ccb1352e JG |
202 | dev_set_promiscuity(netdev_vport->dev, -1); |
203 | ||
204 | /* unregister_netdevice() waits for an RCU grace period. */ | |
205 | unregister_netdevice(netdev_vport->dev); | |
8e4e1713 PS |
206 | |
207 | rtnl_unlock(); | |
ccb1352e JG |
208 | } |
209 | ||
210 | static int internal_dev_recv(struct vport *vport, struct sk_buff *skb) | |
211 | { | |
212 | struct net_device *netdev = netdev_vport_priv(vport)->dev; | |
213 | int len; | |
214 | ||
215 | len = skb->len; | |
7fe99e2d JG |
216 | |
217 | skb_dst_drop(skb); | |
218 | nf_reset(skb); | |
219 | secpath_reset(skb); | |
220 | ||
ccb1352e JG |
221 | skb->dev = netdev; |
222 | skb->pkt_type = PACKET_HOST; | |
223 | skb->protocol = eth_type_trans(skb, netdev); | |
b34df5e8 | 224 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
ccb1352e JG |
225 | |
226 | netif_rx(skb); | |
227 | ||
228 | return len; | |
229 | } | |
230 | ||
231 | const struct vport_ops ovs_internal_vport_ops = { | |
232 | .type = OVS_VPORT_TYPE_INTERNAL, | |
233 | .create = internal_dev_create, | |
234 | .destroy = internal_dev_destroy, | |
235 | .get_name = ovs_netdev_get_name, | |
ccb1352e JG |
236 | .send = internal_dev_recv, |
237 | }; | |
238 | ||
239 | int ovs_is_internal_dev(const struct net_device *netdev) | |
240 | { | |
241 | return netdev->netdev_ops == &internal_dev_netdev_ops; | |
242 | } | |
243 | ||
244 | struct vport *ovs_internal_dev_get_vport(struct net_device *netdev) | |
245 | { | |
246 | if (!ovs_is_internal_dev(netdev)) | |
247 | return NULL; | |
248 | ||
249 | return internal_dev_priv(netdev)->vport; | |
250 | } |