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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> | |
5b9e7e16 | 29 | #include <net/rtnetlink.h> |
7fe99e2d | 30 | |
ccb1352e JG |
31 | #include "datapath.h" |
32 | #include "vport-internal_dev.h" | |
33 | #include "vport-netdev.h" | |
34 | ||
35 | struct internal_dev { | |
36 | struct vport *vport; | |
37 | }; | |
38 | ||
39 | static struct internal_dev *internal_dev_priv(struct net_device *netdev) | |
40 | { | |
41 | return netdev_priv(netdev); | |
42 | } | |
43 | ||
44 | /* This function is only called by the kernel network layer.*/ | |
45 | static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev, | |
46 | struct rtnl_link_stats64 *stats) | |
47 | { | |
48 | struct vport *vport = ovs_internal_dev_get_vport(netdev); | |
49 | struct ovs_vport_stats vport_stats; | |
50 | ||
51 | ovs_vport_get_stats(vport, &vport_stats); | |
52 | ||
53 | /* The tx and rx stats need to be swapped because the | |
54 | * switch and host OS have opposite perspectives. */ | |
55 | stats->rx_packets = vport_stats.tx_packets; | |
56 | stats->tx_packets = vport_stats.rx_packets; | |
57 | stats->rx_bytes = vport_stats.tx_bytes; | |
58 | stats->tx_bytes = vport_stats.rx_bytes; | |
59 | stats->rx_errors = vport_stats.tx_errors; | |
60 | stats->tx_errors = vport_stats.rx_errors; | |
61 | stats->rx_dropped = vport_stats.tx_dropped; | |
62 | stats->tx_dropped = vport_stats.rx_dropped; | |
63 | ||
64 | return stats; | |
65 | } | |
66 | ||
ccb1352e JG |
67 | /* Called with rcu_read_lock_bh. */ |
68 | static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) | |
69 | { | |
70 | rcu_read_lock(); | |
7d5437c7 | 71 | ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL); |
ccb1352e JG |
72 | rcu_read_unlock(); |
73 | return 0; | |
74 | } | |
75 | ||
76 | static int internal_dev_open(struct net_device *netdev) | |
77 | { | |
78 | netif_start_queue(netdev); | |
79 | return 0; | |
80 | } | |
81 | ||
82 | static int internal_dev_stop(struct net_device *netdev) | |
83 | { | |
84 | netif_stop_queue(netdev); | |
85 | return 0; | |
86 | } | |
87 | ||
88 | static void internal_dev_getinfo(struct net_device *netdev, | |
89 | struct ethtool_drvinfo *info) | |
90 | { | |
7826d43f | 91 | strlcpy(info->driver, "openvswitch", sizeof(info->driver)); |
ccb1352e JG |
92 | } |
93 | ||
94 | static const struct ethtool_ops internal_dev_ethtool_ops = { | |
95 | .get_drvinfo = internal_dev_getinfo, | |
96 | .get_link = ethtool_op_get_link, | |
97 | }; | |
98 | ||
99 | static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu) | |
100 | { | |
101 | if (new_mtu < 68) | |
102 | return -EINVAL; | |
103 | ||
104 | netdev->mtu = new_mtu; | |
105 | return 0; | |
106 | } | |
107 | ||
108 | static void internal_dev_destructor(struct net_device *dev) | |
109 | { | |
110 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
111 | ||
112 | ovs_vport_free(vport); | |
113 | free_netdev(dev); | |
114 | } | |
115 | ||
116 | static const struct net_device_ops internal_dev_netdev_ops = { | |
117 | .ndo_open = internal_dev_open, | |
118 | .ndo_stop = internal_dev_stop, | |
119 | .ndo_start_xmit = internal_dev_xmit, | |
9151991c | 120 | .ndo_set_mac_address = eth_mac_addr, |
ccb1352e JG |
121 | .ndo_change_mtu = internal_dev_change_mtu, |
122 | .ndo_get_stats64 = internal_dev_get_stats, | |
123 | }; | |
124 | ||
5b9e7e16 JP |
125 | static struct rtnl_link_ops internal_dev_link_ops __read_mostly = { |
126 | .kind = "openvswitch", | |
127 | }; | |
128 | ||
ccb1352e JG |
129 | static void do_setup(struct net_device *netdev) |
130 | { | |
131 | ether_setup(netdev); | |
132 | ||
133 | netdev->netdev_ops = &internal_dev_netdev_ops; | |
134 | ||
135 | netdev->priv_flags &= ~IFF_TX_SKB_SHARING; | |
9151991c | 136 | netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
ccb1352e | 137 | netdev->destructor = internal_dev_destructor; |
7ad24ea4 | 138 | netdev->ethtool_ops = &internal_dev_ethtool_ops; |
5b9e7e16 | 139 | netdev->rtnl_link_ops = &internal_dev_link_ops; |
ccb1352e JG |
140 | netdev->tx_queue_len = 0; |
141 | ||
142 | netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST | | |
3cdb35b0 | 143 | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE; |
ccb1352e JG |
144 | |
145 | netdev->vlan_features = netdev->features; | |
f646968f | 146 | netdev->features |= NETIF_F_HW_VLAN_CTAG_TX; |
ccb1352e | 147 | netdev->hw_features = netdev->features & ~NETIF_F_LLTX; |
7ce5d222 | 148 | eth_hw_addr_random(netdev); |
ccb1352e JG |
149 | } |
150 | ||
151 | static struct vport *internal_dev_create(const struct vport_parms *parms) | |
152 | { | |
153 | struct vport *vport; | |
154 | struct netdev_vport *netdev_vport; | |
155 | struct internal_dev *internal_dev; | |
156 | int err; | |
157 | ||
158 | vport = ovs_vport_alloc(sizeof(struct netdev_vport), | |
159 | &ovs_internal_vport_ops, parms); | |
160 | if (IS_ERR(vport)) { | |
161 | err = PTR_ERR(vport); | |
162 | goto error; | |
163 | } | |
164 | ||
165 | netdev_vport = netdev_vport_priv(vport); | |
166 | ||
167 | netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev), | |
c835a677 TG |
168 | parms->name, NET_NAME_UNKNOWN, |
169 | do_setup); | |
ccb1352e JG |
170 | if (!netdev_vport->dev) { |
171 | err = -ENOMEM; | |
172 | goto error_free_vport; | |
173 | } | |
174 | ||
46df7b81 | 175 | dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp)); |
ccb1352e JG |
176 | internal_dev = internal_dev_priv(netdev_vport->dev); |
177 | internal_dev->vport = vport; | |
178 | ||
46df7b81 PS |
179 | /* Restrict bridge port to current netns. */ |
180 | if (vport->port_no == OVSP_LOCAL) | |
181 | netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL; | |
182 | ||
8e4e1713 | 183 | rtnl_lock(); |
ccb1352e JG |
184 | err = register_netdevice(netdev_vport->dev); |
185 | if (err) | |
186 | goto error_free_netdev; | |
187 | ||
188 | dev_set_promiscuity(netdev_vport->dev, 1); | |
8e4e1713 | 189 | rtnl_unlock(); |
ccb1352e JG |
190 | netif_start_queue(netdev_vport->dev); |
191 | ||
192 | return vport; | |
193 | ||
194 | error_free_netdev: | |
8e4e1713 | 195 | rtnl_unlock(); |
ccb1352e JG |
196 | free_netdev(netdev_vport->dev); |
197 | error_free_vport: | |
198 | ovs_vport_free(vport); | |
199 | error: | |
200 | return ERR_PTR(err); | |
201 | } | |
202 | ||
203 | static void internal_dev_destroy(struct vport *vport) | |
204 | { | |
205 | struct netdev_vport *netdev_vport = netdev_vport_priv(vport); | |
206 | ||
207 | netif_stop_queue(netdev_vport->dev); | |
8e4e1713 | 208 | rtnl_lock(); |
ccb1352e JG |
209 | dev_set_promiscuity(netdev_vport->dev, -1); |
210 | ||
211 | /* unregister_netdevice() waits for an RCU grace period. */ | |
212 | unregister_netdevice(netdev_vport->dev); | |
8e4e1713 PS |
213 | |
214 | rtnl_unlock(); | |
ccb1352e JG |
215 | } |
216 | ||
217 | static int internal_dev_recv(struct vport *vport, struct sk_buff *skb) | |
218 | { | |
219 | struct net_device *netdev = netdev_vport_priv(vport)->dev; | |
220 | int len; | |
221 | ||
222 | len = skb->len; | |
7fe99e2d JG |
223 | |
224 | skb_dst_drop(skb); | |
225 | nf_reset(skb); | |
226 | secpath_reset(skb); | |
227 | ||
ccb1352e JG |
228 | skb->dev = netdev; |
229 | skb->pkt_type = PACKET_HOST; | |
230 | skb->protocol = eth_type_trans(skb, netdev); | |
b34df5e8 | 231 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
ccb1352e JG |
232 | |
233 | netif_rx(skb); | |
234 | ||
235 | return len; | |
236 | } | |
237 | ||
238 | const struct vport_ops ovs_internal_vport_ops = { | |
239 | .type = OVS_VPORT_TYPE_INTERNAL, | |
240 | .create = internal_dev_create, | |
241 | .destroy = internal_dev_destroy, | |
242 | .get_name = ovs_netdev_get_name, | |
ccb1352e JG |
243 | .send = internal_dev_recv, |
244 | }; | |
245 | ||
246 | int ovs_is_internal_dev(const struct net_device *netdev) | |
247 | { | |
248 | return netdev->netdev_ops == &internal_dev_netdev_ops; | |
249 | } | |
250 | ||
251 | struct vport *ovs_internal_dev_get_vport(struct net_device *netdev) | |
252 | { | |
253 | if (!ovs_is_internal_dev(netdev)) | |
254 | return NULL; | |
255 | ||
256 | return internal_dev_priv(netdev)->vport; | |
257 | } | |
5b9e7e16 JP |
258 | |
259 | int ovs_internal_dev_rtnl_link_register(void) | |
260 | { | |
261 | return rtnl_link_register(&internal_dev_link_ops); | |
262 | } | |
263 | ||
264 | void ovs_internal_dev_rtnl_link_unregister(void) | |
265 | { | |
266 | rtnl_link_unregister(&internal_dev_link_ops); | |
267 | } |