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f2459fe7 | 1 | /* |
8063e095 | 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> | |
f2459fe7 | 25 | #include <linux/skbuff.h> |
f2459fe7 | 26 | |
53e6421b JG |
27 | #include <net/dst.h> |
28 | #include <net/xfrm.h> | |
e23775f2 | 29 | #include <net/rtnetlink.h> |
53e6421b | 30 | |
f2459fe7 JG |
31 | #include "datapath.h" |
32 | #include "vport-internal_dev.h" | |
33 | #include "vport-netdev.h" | |
34 | ||
f2459fe7 | 35 | struct internal_dev { |
7237e4f4 | 36 | struct vport *vport; |
f2459fe7 JG |
37 | }; |
38 | ||
5a38795f TG |
39 | static struct vport_ops ovs_internal_vport_ops; |
40 | ||
6455100f | 41 | static struct internal_dev *internal_dev_priv(struct net_device *netdev) |
f2459fe7 JG |
42 | { |
43 | return netdev_priv(netdev); | |
44 | } | |
45 | ||
8a5d84f6 | 46 | /* Called with rcu_read_lock_bh. */ |
f2459fe7 JG |
47 | static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) |
48 | { | |
e23775f2 PS |
49 | int len, err; |
50 | ||
51 | len = skb->len; | |
8a5d84f6 | 52 | rcu_read_lock(); |
e23775f2 | 53 | err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL); |
8a5d84f6 | 54 | rcu_read_unlock(); |
e23775f2 PS |
55 | |
56 | if (likely(!err)) { | |
8063e095 | 57 | struct pcpu_sw_netstats *tstats = this_cpu_ptr(netdev->tstats); |
e23775f2 PS |
58 | |
59 | u64_stats_update_begin(&tstats->syncp); | |
60 | tstats->tx_bytes += len; | |
61 | tstats->tx_packets++; | |
62 | u64_stats_update_end(&tstats->syncp); | |
e23775f2 PS |
63 | } else { |
64 | netdev->stats.tx_errors++; | |
65 | } | |
f2459fe7 JG |
66 | return 0; |
67 | } | |
68 | ||
69 | static int internal_dev_open(struct net_device *netdev) | |
70 | { | |
71 | netif_start_queue(netdev); | |
72 | return 0; | |
73 | } | |
74 | ||
75 | static int internal_dev_stop(struct net_device *netdev) | |
76 | { | |
77 | netif_stop_queue(netdev); | |
78 | return 0; | |
79 | } | |
80 | ||
81 | static void internal_dev_getinfo(struct net_device *netdev, | |
82 | struct ethtool_drvinfo *info) | |
83 | { | |
c58a0a6b | 84 | strlcpy(info->driver, "openvswitch", sizeof(info->driver)); |
f2459fe7 JG |
85 | } |
86 | ||
b279fccf | 87 | static const struct ethtool_ops internal_dev_ethtool_ops = { |
f4267e34 JG |
88 | .get_drvinfo = internal_dev_getinfo, |
89 | .get_link = ethtool_op_get_link, | |
f2459fe7 JG |
90 | }; |
91 | ||
92 | static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu) | |
93 | { | |
f2459fe7 JG |
94 | if (new_mtu < 68) |
95 | return -EINVAL; | |
96 | ||
f2459fe7 JG |
97 | netdev->mtu = new_mtu; |
98 | return 0; | |
99 | } | |
100 | ||
8338302d JG |
101 | static void internal_dev_destructor(struct net_device *dev) |
102 | { | |
850b6b3b | 103 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
8338302d | 104 | |
850b6b3b | 105 | ovs_vport_free(vport); |
8338302d JG |
106 | free_netdev(dev); |
107 | } | |
108 | ||
8063e095 PS |
109 | static struct rtnl_link_stats64 * |
110 | internal_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats) | |
e23775f2 | 111 | { |
8063e095 PS |
112 | int i; |
113 | ||
114 | memset(stats, 0, sizeof(*stats)); | |
115 | stats->rx_errors = dev->stats.rx_errors; | |
116 | stats->tx_errors = dev->stats.tx_errors; | |
117 | stats->tx_dropped = dev->stats.tx_dropped; | |
118 | stats->rx_dropped = dev->stats.rx_dropped; | |
119 | ||
120 | for_each_possible_cpu(i) { | |
121 | const struct pcpu_sw_netstats *percpu_stats; | |
122 | struct pcpu_sw_netstats local_stats; | |
123 | unsigned int start; | |
124 | ||
125 | percpu_stats = per_cpu_ptr(dev->tstats, i); | |
126 | ||
127 | do { | |
128 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); | |
129 | local_stats = *percpu_stats; | |
130 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); | |
131 | ||
132 | stats->rx_bytes += local_stats.rx_bytes; | |
133 | stats->rx_packets += local_stats.rx_packets; | |
134 | stats->tx_bytes += local_stats.tx_bytes; | |
135 | stats->tx_packets += local_stats.tx_packets; | |
136 | } | |
e23775f2 | 137 | |
8063e095 | 138 | return stats; |
e23775f2 | 139 | } |
e23775f2 | 140 | |
f2459fe7 | 141 | static const struct net_device_ops internal_dev_netdev_ops = { |
f2459fe7 JG |
142 | .ndo_open = internal_dev_open, |
143 | .ndo_stop = internal_dev_stop, | |
144 | .ndo_start_xmit = internal_dev_xmit, | |
faa61e25 | 145 | .ndo_set_mac_address = eth_mac_addr, |
f2459fe7 | 146 | .ndo_change_mtu = internal_dev_change_mtu, |
8063e095 | 147 | .ndo_get_stats64 = internal_get_stats, |
f2459fe7 | 148 | }; |
f2459fe7 | 149 | |
5282e284 TG |
150 | static struct rtnl_link_ops internal_dev_link_ops __read_mostly = { |
151 | .kind = "openvswitch", | |
152 | }; | |
153 | ||
fceb2a5b | 154 | static void do_setup(struct net_device *netdev) |
f2459fe7 JG |
155 | { |
156 | ether_setup(netdev); | |
157 | ||
f2459fe7 | 158 | netdev->netdev_ops = &internal_dev_netdev_ops; |
f2459fe7 | 159 | |
9c8482e9 | 160 | netdev->priv_flags &= ~IFF_TX_SKB_SHARING; |
e23775f2 | 161 | netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_OPENVSWITCH; |
8338302d | 162 | netdev->destructor = internal_dev_destructor; |
f6a0c895 | 163 | netdev->ethtool_ops = &internal_dev_ethtool_ops; |
5282e284 | 164 | netdev->rtnl_link_ops = &internal_dev_link_ops; |
f2459fe7 JG |
165 | netdev->tx_queue_len = 0; |
166 | ||
8e6c8ff5 | 167 | netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST | |
c7d084d6 PS |
168 | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | |
169 | NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL; | |
f2459fe7 | 170 | |
926ea16e | 171 | netdev->vlan_features = netdev->features; |
c7d084d6 | 172 | netdev->hw_enc_features = netdev->features; |
8063e095 | 173 | netdev->features |= NETIF_F_HW_VLAN_CTAG_TX; |
e23775f2 | 174 | netdev->hw_features = netdev->features & ~NETIF_F_LLTX; |
8063e095 | 175 | |
55053441 | 176 | eth_hw_addr_random(netdev); |
f2459fe7 JG |
177 | } |
178 | ||
94903c98 | 179 | static struct vport *internal_dev_create(const struct vport_parms *parms) |
f2459fe7 JG |
180 | { |
181 | struct vport *vport; | |
f2459fe7 JG |
182 | struct internal_dev *internal_dev; |
183 | int err; | |
184 | ||
e23775f2 | 185 | vport = ovs_vport_alloc(0, &ovs_internal_vport_ops, parms); |
f2459fe7 JG |
186 | if (IS_ERR(vport)) { |
187 | err = PTR_ERR(vport); | |
188 | goto error; | |
189 | } | |
190 | ||
e23775f2 PS |
191 | vport->dev = alloc_netdev(sizeof(struct internal_dev), |
192 | parms->name, NET_NAME_UNKNOWN, do_setup); | |
193 | if (!vport->dev) { | |
f2459fe7 JG |
194 | err = -ENOMEM; |
195 | goto error_free_vport; | |
196 | } | |
8063e095 PS |
197 | vport->dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
198 | if (!vport->dev->tstats) { | |
199 | err = -ENOMEM; | |
200 | goto error_free_netdev; | |
201 | } | |
f2459fe7 | 202 | |
e23775f2 PS |
203 | dev_net_set(vport->dev, ovs_dp_get_net(vport->dp)); |
204 | internal_dev = internal_dev_priv(vport->dev); | |
c052da84 | 205 | internal_dev->vport = vport; |
f2459fe7 | 206 | |
2a4999f3 PS |
207 | /* Restrict bridge port to current netns. */ |
208 | if (vport->port_no == OVSP_LOCAL) | |
e23775f2 | 209 | vport->dev->features |= NETIF_F_NETNS_LOCAL; |
2a4999f3 | 210 | |
cd2a59e9 | 211 | rtnl_lock(); |
e23775f2 | 212 | err = register_netdevice(vport->dev); |
f2459fe7 | 213 | if (err) |
8063e095 | 214 | goto error_unlock; |
f2459fe7 | 215 | |
e23775f2 | 216 | dev_set_promiscuity(vport->dev, 1); |
cd2a59e9 | 217 | rtnl_unlock(); |
e23775f2 | 218 | netif_start_queue(vport->dev); |
7237e4f4 | 219 | |
f2459fe7 JG |
220 | return vport; |
221 | ||
8063e095 | 222 | error_unlock: |
cd2a59e9 | 223 | rtnl_unlock(); |
8063e095 PS |
224 | free_percpu(vport->dev->tstats); |
225 | error_free_netdev: | |
e23775f2 | 226 | free_netdev(vport->dev); |
f2459fe7 | 227 | error_free_vport: |
850b6b3b | 228 | ovs_vport_free(vport); |
f2459fe7 JG |
229 | error: |
230 | return ERR_PTR(err); | |
231 | } | |
232 | ||
3544358a | 233 | static void internal_dev_destroy(struct vport *vport) |
f2459fe7 | 234 | { |
e23775f2 | 235 | netif_stop_queue(vport->dev); |
cd2a59e9 | 236 | rtnl_lock(); |
e23775f2 | 237 | dev_set_promiscuity(vport->dev, -1); |
7237e4f4 | 238 | |
057dd6d2 | 239 | /* unregister_netdevice() waits for an RCU grace period. */ |
e23775f2 | 240 | unregister_netdevice(vport->dev); |
8063e095 | 241 | free_percpu(vport->dev->tstats); |
cd2a59e9 | 242 | rtnl_unlock(); |
f2459fe7 JG |
243 | } |
244 | ||
e23775f2 | 245 | static netdev_tx_t internal_dev_recv(struct sk_buff *skb) |
f2459fe7 | 246 | { |
e23775f2 | 247 | struct net_device *netdev = skb->dev; |
e23775f2 | 248 | struct pcpu_sw_netstats *stats; |
f2459fe7 | 249 | |
0077a780 CL |
250 | if (unlikely(!(netdev->flags & IFF_UP))) { |
251 | kfree_skb(skb); | |
e23775f2 PS |
252 | netdev->stats.rx_dropped++; |
253 | return NETDEV_TX_OK; | |
0077a780 CL |
254 | } |
255 | ||
53e6421b JG |
256 | skb_dst_drop(skb); |
257 | nf_reset(skb); | |
258 | secpath_reset(skb); | |
259 | ||
f2459fe7 JG |
260 | skb->pkt_type = PACKET_HOST; |
261 | skb->protocol = eth_type_trans(skb, netdev); | |
3cfede14 | 262 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
f2459fe7 | 263 | |
8063e095 | 264 | stats = this_cpu_ptr(netdev->tstats); |
e23775f2 PS |
265 | u64_stats_update_begin(&stats->syncp); |
266 | stats->rx_packets++; | |
267 | stats->rx_bytes += skb->len; | |
268 | u64_stats_update_end(&stats->syncp); | |
a5b7d883 | 269 | |
e23775f2 PS |
270 | netif_rx(skb); |
271 | return NETDEV_TX_OK; | |
f2459fe7 JG |
272 | } |
273 | ||
5a38795f | 274 | static struct vport_ops ovs_internal_vport_ops = { |
df2c07f4 | 275 | .type = OVS_VPORT_TYPE_INTERNAL, |
f2459fe7 JG |
276 | .create = internal_dev_create, |
277 | .destroy = internal_dev_destroy, | |
f2459fe7 JG |
278 | .send = internal_dev_recv, |
279 | }; | |
280 | ||
850b6b3b | 281 | int ovs_is_internal_dev(const struct net_device *netdev) |
f2459fe7 | 282 | { |
f2459fe7 | 283 | return netdev->netdev_ops == &internal_dev_netdev_ops; |
f2459fe7 JG |
284 | } |
285 | ||
850b6b3b | 286 | struct vport *ovs_internal_dev_get_vport(struct net_device *netdev) |
f2459fe7 | 287 | { |
850b6b3b | 288 | if (!ovs_is_internal_dev(netdev)) |
17a07f9f | 289 | return NULL; |
7237e4f4 | 290 | |
c052da84 | 291 | return internal_dev_priv(netdev)->vport; |
f2459fe7 | 292 | } |
5282e284 TG |
293 | |
294 | int ovs_internal_dev_rtnl_link_register(void) | |
295 | { | |
5a38795f TG |
296 | int err; |
297 | ||
298 | err = rtnl_link_register(&internal_dev_link_ops); | |
299 | if (err < 0) | |
300 | return err; | |
301 | ||
302 | err = ovs_vport_ops_register(&ovs_internal_vport_ops); | |
303 | if (err < 0) | |
304 | rtnl_link_unregister(&internal_dev_link_ops); | |
305 | ||
306 | return err; | |
5282e284 TG |
307 | } |
308 | ||
309 | void ovs_internal_dev_rtnl_link_unregister(void) | |
310 | { | |
5a38795f | 311 | ovs_vport_ops_unregister(&ovs_internal_vport_ops); |
5282e284 TG |
312 | rtnl_link_unregister(&internal_dev_link_ops); |
313 | } |