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f2459fe7 | 1 | /* |
e0edde6f | 2 | * Copyright (c) 2007-2012 Nicira, Inc. |
f2459fe7 | 3 | * |
a9a29d22 JG |
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 | |
f2459fe7 JG |
17 | */ |
18 | ||
88211dda | 19 | #include <linux/hardirq.h> |
6ce39213 | 20 | #include <linux/if_vlan.h> |
f2459fe7 JG |
21 | #include <linux/kernel.h> |
22 | #include <linux/netdevice.h> | |
23 | #include <linux/etherdevice.h> | |
24 | #include <linux/ethtool.h> | |
9b764edf | 25 | #include <linux/netdev_features.h> |
f2459fe7 | 26 | #include <linux/skbuff.h> |
a5b7d883 | 27 | #include <linux/version.h> |
f2459fe7 | 28 | |
53e6421b JG |
29 | #include <net/dst.h> |
30 | #include <net/xfrm.h> | |
31 | ||
f2459fe7 | 32 | #include "datapath.h" |
6e0ce48e | 33 | #include "vlan.h" |
f2459fe7 JG |
34 | #include "vport-internal_dev.h" |
35 | #include "vport-netdev.h" | |
36 | ||
f2459fe7 | 37 | struct internal_dev { |
7237e4f4 | 38 | struct vport *vport; |
f2459fe7 JG |
39 | }; |
40 | ||
6455100f | 41 | static struct internal_dev *internal_dev_priv(struct net_device *netdev) |
f2459fe7 JG |
42 | { |
43 | return netdev_priv(netdev); | |
44 | } | |
45 | ||
f613a0d7 | 46 | /* This function is only called by the kernel network layer.*/ |
dc670cf5 PS |
47 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36) |
48 | static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev, | |
49 | struct rtnl_link_stats64 *stats) | |
50 | { | |
51 | #else | |
4ea115b6 | 52 | static struct net_device_stats *internal_dev_sys_stats(struct net_device *netdev) |
f2459fe7 | 53 | { |
dc670cf5 | 54 | struct net_device_stats *stats = &netdev->stats; |
dc670cf5 | 55 | #endif |
850b6b3b | 56 | struct vport *vport = ovs_internal_dev_get_vport(netdev); |
dc670cf5 | 57 | struct ovs_vport_stats vport_stats; |
4ea115b6 | 58 | |
850b6b3b | 59 | ovs_vport_get_stats(vport, &vport_stats); |
dc670cf5 PS |
60 | |
61 | /* The tx and rx stats need to be swapped because the | |
62 | * switch and host OS have opposite perspectives. */ | |
63 | stats->rx_packets = vport_stats.tx_packets; | |
64 | stats->tx_packets = vport_stats.rx_packets; | |
65 | stats->rx_bytes = vport_stats.tx_bytes; | |
66 | stats->tx_bytes = vport_stats.rx_bytes; | |
67 | stats->rx_errors = vport_stats.tx_errors; | |
68 | stats->tx_errors = vport_stats.rx_errors; | |
69 | stats->rx_dropped = vport_stats.tx_dropped; | |
70 | stats->tx_dropped = vport_stats.rx_dropped; | |
4ea115b6 | 71 | |
f2459fe7 JG |
72 | return stats; |
73 | } | |
74 | ||
8a5d84f6 | 75 | /* Called with rcu_read_lock_bh. */ |
f2459fe7 JG |
76 | static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) |
77 | { | |
8a5d84f6 | 78 | rcu_read_lock(); |
db0c3134 | 79 | ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL); |
8a5d84f6 | 80 | rcu_read_unlock(); |
f2459fe7 JG |
81 | return 0; |
82 | } | |
83 | ||
84 | static int internal_dev_open(struct net_device *netdev) | |
85 | { | |
86 | netif_start_queue(netdev); | |
87 | return 0; | |
88 | } | |
89 | ||
90 | static int internal_dev_stop(struct net_device *netdev) | |
91 | { | |
92 | netif_stop_queue(netdev); | |
93 | return 0; | |
94 | } | |
95 | ||
96 | static void internal_dev_getinfo(struct net_device *netdev, | |
97 | struct ethtool_drvinfo *info) | |
98 | { | |
c58a0a6b | 99 | strlcpy(info->driver, "openvswitch", sizeof(info->driver)); |
f2459fe7 JG |
100 | } |
101 | ||
b279fccf | 102 | static const struct ethtool_ops internal_dev_ethtool_ops = { |
f4267e34 JG |
103 | .get_drvinfo = internal_dev_getinfo, |
104 | .get_link = ethtool_op_get_link, | |
6f17885b | 105 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39) |
f4267e34 JG |
106 | .get_sg = ethtool_op_get_sg, |
107 | .set_sg = ethtool_op_set_sg, | |
108 | .get_tx_csum = ethtool_op_get_tx_csum, | |
109 | .set_tx_csum = ethtool_op_set_tx_hw_csum, | |
110 | .get_tso = ethtool_op_get_tso, | |
111 | .set_tso = ethtool_op_set_tso, | |
6f17885b | 112 | #endif |
f2459fe7 JG |
113 | }; |
114 | ||
115 | static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu) | |
116 | { | |
f2459fe7 JG |
117 | if (new_mtu < 68) |
118 | return -EINVAL; | |
119 | ||
f2459fe7 JG |
120 | netdev->mtu = new_mtu; |
121 | return 0; | |
122 | } | |
123 | ||
8338302d JG |
124 | static void internal_dev_destructor(struct net_device *dev) |
125 | { | |
850b6b3b | 126 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
8338302d | 127 | |
850b6b3b | 128 | ovs_vport_free(vport); |
8338302d JG |
129 | free_netdev(dev); |
130 | } | |
131 | ||
f2459fe7 | 132 | static const struct net_device_ops internal_dev_netdev_ops = { |
f2459fe7 JG |
133 | .ndo_open = internal_dev_open, |
134 | .ndo_stop = internal_dev_stop, | |
135 | .ndo_start_xmit = internal_dev_xmit, | |
faa61e25 | 136 | .ndo_set_mac_address = eth_mac_addr, |
f2459fe7 | 137 | .ndo_change_mtu = internal_dev_change_mtu, |
dc670cf5 PS |
138 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36) |
139 | .ndo_get_stats64 = internal_dev_get_stats, | |
140 | #else | |
4ea115b6 | 141 | .ndo_get_stats = internal_dev_sys_stats, |
dc670cf5 | 142 | #endif |
f2459fe7 | 143 | }; |
f2459fe7 | 144 | |
fceb2a5b | 145 | static void do_setup(struct net_device *netdev) |
f2459fe7 JG |
146 | { |
147 | ether_setup(netdev); | |
148 | ||
f2459fe7 | 149 | netdev->netdev_ops = &internal_dev_netdev_ops; |
f2459fe7 | 150 | |
9c8482e9 | 151 | netdev->priv_flags &= ~IFF_TX_SKB_SHARING; |
faa61e25 | 152 | netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
8338302d | 153 | netdev->destructor = internal_dev_destructor; |
f2459fe7 JG |
154 | SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops); |
155 | netdev->tx_queue_len = 0; | |
156 | ||
8e6c8ff5 | 157 | netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST | |
1591fe8e | 158 | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE; |
f2459fe7 | 159 | |
926ea16e | 160 | netdev->vlan_features = netdev->features; |
9b764edf | 161 | netdev->features |= NETIF_F_HW_VLAN_CTAG_TX; |
926ea16e | 162 | |
6f17885b PS |
163 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39) |
164 | netdev->hw_features = netdev->features & ~NETIF_F_LLTX; | |
165 | #endif | |
55053441 | 166 | eth_hw_addr_random(netdev); |
f2459fe7 JG |
167 | } |
168 | ||
94903c98 | 169 | static struct vport *internal_dev_create(const struct vport_parms *parms) |
f2459fe7 JG |
170 | { |
171 | struct vport *vport; | |
172 | struct netdev_vport *netdev_vport; | |
173 | struct internal_dev *internal_dev; | |
174 | int err; | |
175 | ||
850b6b3b JG |
176 | vport = ovs_vport_alloc(sizeof(struct netdev_vport), |
177 | &ovs_internal_vport_ops, parms); | |
f2459fe7 JG |
178 | if (IS_ERR(vport)) { |
179 | err = PTR_ERR(vport); | |
180 | goto error; | |
181 | } | |
182 | ||
183 | netdev_vport = netdev_vport_priv(vport); | |
184 | ||
6455100f PS |
185 | netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev), |
186 | parms->name, do_setup); | |
f2459fe7 JG |
187 | if (!netdev_vport->dev) { |
188 | err = -ENOMEM; | |
189 | goto error_free_vport; | |
190 | } | |
191 | ||
2a4999f3 | 192 | dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp)); |
f2459fe7 | 193 | internal_dev = internal_dev_priv(netdev_vport->dev); |
c052da84 | 194 | internal_dev->vport = vport; |
f2459fe7 | 195 | |
2a4999f3 PS |
196 | /* Restrict bridge port to current netns. */ |
197 | if (vport->port_no == OVSP_LOCAL) | |
198 | netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL; | |
199 | ||
cd2a59e9 | 200 | rtnl_lock(); |
f2459fe7 JG |
201 | err = register_netdevice(netdev_vport->dev); |
202 | if (err) | |
203 | goto error_free_netdev; | |
204 | ||
7237e4f4 | 205 | dev_set_promiscuity(netdev_vport->dev, 1); |
cd2a59e9 | 206 | rtnl_unlock(); |
7237e4f4 BP |
207 | netif_start_queue(netdev_vport->dev); |
208 | ||
f2459fe7 JG |
209 | return vport; |
210 | ||
211 | error_free_netdev: | |
cd2a59e9 | 212 | rtnl_unlock(); |
f2459fe7 JG |
213 | free_netdev(netdev_vport->dev); |
214 | error_free_vport: | |
850b6b3b | 215 | ovs_vport_free(vport); |
f2459fe7 JG |
216 | error: |
217 | return ERR_PTR(err); | |
218 | } | |
219 | ||
3544358a | 220 | static void internal_dev_destroy(struct vport *vport) |
f2459fe7 JG |
221 | { |
222 | struct netdev_vport *netdev_vport = netdev_vport_priv(vport); | |
223 | ||
63db6ec3 | 224 | netif_stop_queue(netdev_vport->dev); |
cd2a59e9 | 225 | rtnl_lock(); |
f2459fe7 | 226 | dev_set_promiscuity(netdev_vport->dev, -1); |
7237e4f4 | 227 | |
057dd6d2 | 228 | /* unregister_netdevice() waits for an RCU grace period. */ |
8338302d | 229 | unregister_netdevice(netdev_vport->dev); |
cd2a59e9 PS |
230 | |
231 | rtnl_unlock(); | |
f2459fe7 JG |
232 | } |
233 | ||
fceb2a5b | 234 | static int internal_dev_recv(struct vport *vport, struct sk_buff *skb) |
f2459fe7 JG |
235 | { |
236 | struct net_device *netdev = netdev_vport_priv(vport)->dev; | |
f2459fe7 JG |
237 | int len; |
238 | ||
6ce39213 | 239 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37) |
07ac71ea PS |
240 | if (vlan_tx_tag_present(skb)) { |
241 | if (unlikely(!__vlan_put_tag(skb, | |
242 | skb->vlan_proto, | |
243 | vlan_tx_tag_get(skb)))) | |
244 | return 0; | |
245 | ||
246 | if (skb->ip_summed == CHECKSUM_COMPLETE) | |
247 | skb->csum = csum_add(skb->csum, | |
248 | csum_partial(skb->data + (2 * ETH_ALEN), | |
249 | VLAN_HLEN, 0)); | |
250 | ||
251 | vlan_set_tci(skb, 0); | |
252 | } | |
6ce39213 JG |
253 | #endif |
254 | ||
f2459fe7 | 255 | len = skb->len; |
53e6421b JG |
256 | |
257 | skb_dst_drop(skb); | |
258 | nf_reset(skb); | |
259 | secpath_reset(skb); | |
260 | ||
6ce39213 | 261 | skb->dev = netdev; |
f2459fe7 JG |
262 | skb->pkt_type = PACKET_HOST; |
263 | skb->protocol = eth_type_trans(skb, netdev); | |
3cfede14 | 264 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
f2459fe7 | 265 | |
e9141eec | 266 | netif_rx(skb); |
a5b7d883 | 267 | |
f2459fe7 JG |
268 | return len; |
269 | } | |
270 | ||
850b6b3b | 271 | const struct vport_ops ovs_internal_vport_ops = { |
df2c07f4 | 272 | .type = OVS_VPORT_TYPE_INTERNAL, |
f2459fe7 JG |
273 | .create = internal_dev_create, |
274 | .destroy = internal_dev_destroy, | |
850b6b3b | 275 | .get_name = ovs_netdev_get_name, |
f2459fe7 JG |
276 | .send = internal_dev_recv, |
277 | }; | |
278 | ||
850b6b3b | 279 | int ovs_is_internal_dev(const struct net_device *netdev) |
f2459fe7 | 280 | { |
f2459fe7 | 281 | return netdev->netdev_ops == &internal_dev_netdev_ops; |
f2459fe7 JG |
282 | } |
283 | ||
850b6b3b | 284 | struct vport *ovs_internal_dev_get_vport(struct net_device *netdev) |
f2459fe7 | 285 | { |
850b6b3b | 286 | if (!ovs_is_internal_dev(netdev)) |
17a07f9f | 287 | return NULL; |
7237e4f4 | 288 | |
c052da84 | 289 | return internal_dev_priv(netdev)->vport; |
f2459fe7 | 290 | } |