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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 | ||
6ce39213 | 19 | #include <linux/if_vlan.h> |
f2459fe7 JG |
20 | #include <linux/kernel.h> |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/etherdevice.h> | |
23 | #include <linux/ethtool.h> | |
f2459fe7 | 24 | #include <linux/skbuff.h> |
f2459fe7 | 25 | |
53e6421b JG |
26 | #include <net/dst.h> |
27 | #include <net/xfrm.h> | |
e23775f2 | 28 | #include <net/rtnetlink.h> |
53e6421b | 29 | |
f2459fe7 JG |
30 | #include "datapath.h" |
31 | #include "vport-internal_dev.h" | |
32 | #include "vport-netdev.h" | |
33 | ||
f2459fe7 | 34 | struct internal_dev { |
7237e4f4 | 35 | struct vport *vport; |
f2459fe7 JG |
36 | }; |
37 | ||
5a38795f TG |
38 | static struct vport_ops ovs_internal_vport_ops; |
39 | ||
6455100f | 40 | static struct internal_dev *internal_dev_priv(struct net_device *netdev) |
f2459fe7 JG |
41 | { |
42 | return netdev_priv(netdev); | |
43 | } | |
44 | ||
8a5d84f6 | 45 | /* Called with rcu_read_lock_bh. */ |
f2459fe7 JG |
46 | static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) |
47 | { | |
e23775f2 PS |
48 | int len, err; |
49 | ||
50 | len = skb->len; | |
8a5d84f6 | 51 | rcu_read_lock(); |
e23775f2 | 52 | err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL); |
8a5d84f6 | 53 | rcu_read_unlock(); |
e23775f2 PS |
54 | |
55 | if (likely(!err)) { | |
8063e095 | 56 | struct pcpu_sw_netstats *tstats = this_cpu_ptr(netdev->tstats); |
e23775f2 PS |
57 | |
58 | u64_stats_update_begin(&tstats->syncp); | |
59 | tstats->tx_bytes += len; | |
60 | tstats->tx_packets++; | |
61 | u64_stats_update_end(&tstats->syncp); | |
e23775f2 PS |
62 | } else { |
63 | netdev->stats.tx_errors++; | |
64 | } | |
f2459fe7 JG |
65 | return 0; |
66 | } | |
67 | ||
68 | static int internal_dev_open(struct net_device *netdev) | |
69 | { | |
70 | netif_start_queue(netdev); | |
71 | return 0; | |
72 | } | |
73 | ||
74 | static int internal_dev_stop(struct net_device *netdev) | |
75 | { | |
76 | netif_stop_queue(netdev); | |
77 | return 0; | |
78 | } | |
79 | ||
80 | static void internal_dev_getinfo(struct net_device *netdev, | |
81 | struct ethtool_drvinfo *info) | |
82 | { | |
c58a0a6b | 83 | strlcpy(info->driver, "openvswitch", sizeof(info->driver)); |
f2459fe7 JG |
84 | } |
85 | ||
b279fccf | 86 | static const struct ethtool_ops internal_dev_ethtool_ops = { |
f4267e34 JG |
87 | .get_drvinfo = internal_dev_getinfo, |
88 | .get_link = ethtool_op_get_link, | |
f2459fe7 JG |
89 | }; |
90 | ||
39ca3383 | 91 | #if !defined(HAVE_NET_DEVICE_WITH_MAX_MTU) && !defined(HAVE_RHEL7_MAX_MTU) |
6c0bf091 | 92 | static int internal_dev_change_mtu(struct net_device *dev, int new_mtu) |
f2459fe7 | 93 | { |
6c0bf091 JW |
94 | if (new_mtu < ETH_MIN_MTU) { |
95 | net_err_ratelimited("%s: Invalid MTU %d requested, hw min %d\n", | |
96 | dev->name, new_mtu, ETH_MIN_MTU); | |
f2459fe7 | 97 | return -EINVAL; |
6c0bf091 JW |
98 | } |
99 | ||
100 | if (new_mtu > ETH_MAX_MTU) { | |
101 | net_err_ratelimited("%s: Invalid MTU %d requested, hw max %d\n", | |
102 | dev->name, new_mtu, ETH_MAX_MTU); | |
103 | return -EINVAL; | |
104 | } | |
f2459fe7 | 105 | |
6c0bf091 | 106 | dev->mtu = new_mtu; |
f2459fe7 JG |
107 | return 0; |
108 | } | |
6c0bf091 | 109 | #endif |
f2459fe7 | 110 | |
8338302d JG |
111 | static void internal_dev_destructor(struct net_device *dev) |
112 | { | |
850b6b3b | 113 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
8338302d | 114 | |
850b6b3b | 115 | ovs_vport_free(vport); |
7f15e8dd | 116 | #ifndef HAVE_NEEDS_FREE_NETDEV |
8338302d | 117 | free_netdev(dev); |
7f15e8dd | 118 | #endif |
8338302d JG |
119 | } |
120 | ||
3c82e35d | 121 | static void |
8063e095 | 122 | internal_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats) |
e23775f2 | 123 | { |
8063e095 PS |
124 | int i; |
125 | ||
126 | memset(stats, 0, sizeof(*stats)); | |
127 | stats->rx_errors = dev->stats.rx_errors; | |
128 | stats->tx_errors = dev->stats.tx_errors; | |
129 | stats->tx_dropped = dev->stats.tx_dropped; | |
130 | stats->rx_dropped = dev->stats.rx_dropped; | |
131 | ||
132 | for_each_possible_cpu(i) { | |
133 | const struct pcpu_sw_netstats *percpu_stats; | |
134 | struct pcpu_sw_netstats local_stats; | |
135 | unsigned int start; | |
136 | ||
137 | percpu_stats = per_cpu_ptr(dev->tstats, i); | |
138 | ||
139 | do { | |
140 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); | |
141 | local_stats = *percpu_stats; | |
142 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); | |
143 | ||
144 | stats->rx_bytes += local_stats.rx_bytes; | |
145 | stats->rx_packets += local_stats.rx_packets; | |
146 | stats->tx_bytes += local_stats.tx_bytes; | |
147 | stats->tx_packets += local_stats.tx_packets; | |
148 | } | |
e23775f2 | 149 | } |
e23775f2 | 150 | |
f2459fe7 | 151 | static const struct net_device_ops internal_dev_netdev_ops = { |
f2459fe7 JG |
152 | .ndo_open = internal_dev_open, |
153 | .ndo_stop = internal_dev_stop, | |
154 | .ndo_start_xmit = internal_dev_xmit, | |
faa61e25 | 155 | .ndo_set_mac_address = eth_mac_addr, |
39ca3383 | 156 | #if !defined(HAVE_NET_DEVICE_WITH_MAX_MTU) && !defined(HAVE_RHEL7_MAX_MTU) |
f2459fe7 | 157 | .ndo_change_mtu = internal_dev_change_mtu, |
6c0bf091 | 158 | #endif |
3c82e35d | 159 | .ndo_get_stats64 = (void *)internal_get_stats, |
f2459fe7 | 160 | }; |
f2459fe7 | 161 | |
5282e284 TG |
162 | static struct rtnl_link_ops internal_dev_link_ops __read_mostly = { |
163 | .kind = "openvswitch", | |
164 | }; | |
165 | ||
fceb2a5b | 166 | static void do_setup(struct net_device *netdev) |
f2459fe7 JG |
167 | { |
168 | ether_setup(netdev); | |
169 | ||
6c0bf091 JW |
170 | #ifdef HAVE_NET_DEVICE_WITH_MAX_MTU |
171 | netdev->max_mtu = ETH_MAX_MTU; | |
172 | #endif | |
f2459fe7 | 173 | netdev->netdev_ops = &internal_dev_netdev_ops; |
f2459fe7 | 174 | |
9c8482e9 | 175 | netdev->priv_flags &= ~IFF_TX_SKB_SHARING; |
8ce37339 | 176 | netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_OPENVSWITCH | |
c497350a | 177 | IFF_NO_QUEUE; |
7f15e8dd | 178 | #ifndef HAVE_NEEDS_FREE_NETDEV |
8338302d | 179 | netdev->destructor = internal_dev_destructor; |
7f15e8dd GR |
180 | #else |
181 | netdev->needs_free_netdev = true; | |
182 | netdev->priv_destructor = internal_dev_destructor; | |
183 | #endif /* HAVE_NEEDS_FREE_NETDEV */ | |
f6a0c895 | 184 | netdev->ethtool_ops = &internal_dev_ethtool_ops; |
5282e284 | 185 | netdev->rtnl_link_ops = &internal_dev_link_ops; |
6089e1d8 PS |
186 | |
187 | #ifndef HAVE_IFF_NO_QUEUE | |
f2459fe7 | 188 | netdev->tx_queue_len = 0; |
6089e1d8 | 189 | #endif |
f2459fe7 | 190 | |
8e6c8ff5 | 191 | netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST | |
c7d084d6 PS |
192 | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | |
193 | NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL; | |
f2459fe7 | 194 | |
926ea16e | 195 | netdev->vlan_features = netdev->features; |
c7d084d6 | 196 | netdev->hw_enc_features = netdev->features; |
8865d2ed | 197 | netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
e23775f2 | 198 | netdev->hw_features = netdev->features & ~NETIF_F_LLTX; |
8063e095 | 199 | |
55053441 | 200 | eth_hw_addr_random(netdev); |
f2459fe7 JG |
201 | } |
202 | ||
94903c98 | 203 | static struct vport *internal_dev_create(const struct vport_parms *parms) |
f2459fe7 JG |
204 | { |
205 | struct vport *vport; | |
f2459fe7 JG |
206 | struct internal_dev *internal_dev; |
207 | int err; | |
208 | ||
e23775f2 | 209 | vport = ovs_vport_alloc(0, &ovs_internal_vport_ops, parms); |
f2459fe7 JG |
210 | if (IS_ERR(vport)) { |
211 | err = PTR_ERR(vport); | |
212 | goto error; | |
213 | } | |
214 | ||
e23775f2 | 215 | vport->dev = alloc_netdev(sizeof(struct internal_dev), |
60434d0d | 216 | parms->name, NET_NAME_USER, do_setup); |
e23775f2 | 217 | if (!vport->dev) { |
f2459fe7 JG |
218 | err = -ENOMEM; |
219 | goto error_free_vport; | |
220 | } | |
8063e095 PS |
221 | vport->dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
222 | if (!vport->dev->tstats) { | |
223 | err = -ENOMEM; | |
224 | goto error_free_netdev; | |
225 | } | |
f2459fe7 | 226 | |
e23775f2 PS |
227 | dev_net_set(vport->dev, ovs_dp_get_net(vport->dp)); |
228 | internal_dev = internal_dev_priv(vport->dev); | |
c052da84 | 229 | internal_dev->vport = vport; |
f2459fe7 | 230 | |
2a4999f3 PS |
231 | /* Restrict bridge port to current netns. */ |
232 | if (vport->port_no == OVSP_LOCAL) | |
e23775f2 | 233 | vport->dev->features |= NETIF_F_NETNS_LOCAL; |
2a4999f3 | 234 | |
cd2a59e9 | 235 | rtnl_lock(); |
e23775f2 | 236 | err = register_netdevice(vport->dev); |
f2459fe7 | 237 | if (err) |
8063e095 | 238 | goto error_unlock; |
f2459fe7 | 239 | |
e23775f2 | 240 | dev_set_promiscuity(vport->dev, 1); |
cd2a59e9 | 241 | rtnl_unlock(); |
e23775f2 | 242 | netif_start_queue(vport->dev); |
7237e4f4 | 243 | |
f2459fe7 JG |
244 | return vport; |
245 | ||
8063e095 | 246 | error_unlock: |
cd2a59e9 | 247 | rtnl_unlock(); |
8063e095 PS |
248 | free_percpu(vport->dev->tstats); |
249 | error_free_netdev: | |
e23775f2 | 250 | free_netdev(vport->dev); |
f2459fe7 | 251 | error_free_vport: |
850b6b3b | 252 | ovs_vport_free(vport); |
f2459fe7 JG |
253 | error: |
254 | return ERR_PTR(err); | |
255 | } | |
256 | ||
3544358a | 257 | static void internal_dev_destroy(struct vport *vport) |
f2459fe7 | 258 | { |
e23775f2 | 259 | netif_stop_queue(vport->dev); |
cd2a59e9 | 260 | rtnl_lock(); |
e23775f2 | 261 | dev_set_promiscuity(vport->dev, -1); |
7237e4f4 | 262 | |
057dd6d2 | 263 | /* unregister_netdevice() waits for an RCU grace period. */ |
e23775f2 | 264 | unregister_netdevice(vport->dev); |
8063e095 | 265 | free_percpu(vport->dev->tstats); |
cd2a59e9 | 266 | rtnl_unlock(); |
f2459fe7 JG |
267 | } |
268 | ||
e23775f2 | 269 | static netdev_tx_t internal_dev_recv(struct sk_buff *skb) |
f2459fe7 | 270 | { |
e23775f2 | 271 | struct net_device *netdev = skb->dev; |
e23775f2 | 272 | struct pcpu_sw_netstats *stats; |
f2459fe7 | 273 | |
0077a780 CL |
274 | if (unlikely(!(netdev->flags & IFF_UP))) { |
275 | kfree_skb(skb); | |
e23775f2 PS |
276 | netdev->stats.rx_dropped++; |
277 | return NETDEV_TX_OK; | |
0077a780 CL |
278 | } |
279 | ||
53e6421b JG |
280 | skb_dst_drop(skb); |
281 | nf_reset(skb); | |
282 | secpath_reset(skb); | |
283 | ||
f2459fe7 JG |
284 | skb->pkt_type = PACKET_HOST; |
285 | skb->protocol = eth_type_trans(skb, netdev); | |
3cfede14 | 286 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
f2459fe7 | 287 | |
8063e095 | 288 | stats = this_cpu_ptr(netdev->tstats); |
e23775f2 PS |
289 | u64_stats_update_begin(&stats->syncp); |
290 | stats->rx_packets++; | |
291 | stats->rx_bytes += skb->len; | |
292 | u64_stats_update_end(&stats->syncp); | |
a5b7d883 | 293 | |
e23775f2 PS |
294 | netif_rx(skb); |
295 | return NETDEV_TX_OK; | |
f2459fe7 JG |
296 | } |
297 | ||
5a38795f | 298 | static struct vport_ops ovs_internal_vport_ops = { |
df2c07f4 | 299 | .type = OVS_VPORT_TYPE_INTERNAL, |
f2459fe7 JG |
300 | .create = internal_dev_create, |
301 | .destroy = internal_dev_destroy, | |
f2459fe7 JG |
302 | .send = internal_dev_recv, |
303 | }; | |
304 | ||
850b6b3b | 305 | int ovs_is_internal_dev(const struct net_device *netdev) |
f2459fe7 | 306 | { |
f2459fe7 | 307 | return netdev->netdev_ops == &internal_dev_netdev_ops; |
f2459fe7 JG |
308 | } |
309 | ||
850b6b3b | 310 | struct vport *ovs_internal_dev_get_vport(struct net_device *netdev) |
f2459fe7 | 311 | { |
850b6b3b | 312 | if (!ovs_is_internal_dev(netdev)) |
17a07f9f | 313 | return NULL; |
7237e4f4 | 314 | |
c052da84 | 315 | return internal_dev_priv(netdev)->vport; |
f2459fe7 | 316 | } |
5282e284 TG |
317 | |
318 | int ovs_internal_dev_rtnl_link_register(void) | |
319 | { | |
5a38795f TG |
320 | int err; |
321 | ||
322 | err = rtnl_link_register(&internal_dev_link_ops); | |
323 | if (err < 0) | |
324 | return err; | |
325 | ||
326 | err = ovs_vport_ops_register(&ovs_internal_vport_ops); | |
327 | if (err < 0) | |
328 | rtnl_link_unregister(&internal_dev_link_ops); | |
329 | ||
330 | return err; | |
5282e284 TG |
331 | } |
332 | ||
333 | void ovs_internal_dev_rtnl_link_unregister(void) | |
334 | { | |
5a38795f | 335 | ovs_vport_ops_unregister(&ovs_internal_vport_ops); |
5282e284 TG |
336 | rtnl_link_unregister(&internal_dev_link_ops); |
337 | } |