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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 | ||
62b9c8d0 TG |
39 | static struct vport_ops ovs_internal_vport_ops; |
40 | ||
ccb1352e JG |
41 | static struct internal_dev *internal_dev_priv(struct net_device *netdev) |
42 | { | |
43 | return netdev_priv(netdev); | |
44 | } | |
45 | ||
ccb1352e | 46 | /* Called with rcu_read_lock_bh. */ |
6f12fdfa Y |
47 | static netdev_tx_t |
48 | internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) | |
ccb1352e | 49 | { |
8c876639 PS |
50 | int len, err; |
51 | ||
52 | len = skb->len; | |
ccb1352e | 53 | rcu_read_lock(); |
8c876639 | 54 | err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL); |
ccb1352e | 55 | rcu_read_unlock(); |
8c876639 PS |
56 | |
57 | if (likely(!err)) { | |
58 | struct pcpu_sw_netstats *tstats = this_cpu_ptr(netdev->tstats); | |
59 | ||
60 | u64_stats_update_begin(&tstats->syncp); | |
61 | tstats->tx_bytes += len; | |
62 | tstats->tx_packets++; | |
63 | u64_stats_update_end(&tstats->syncp); | |
64 | } else { | |
65 | netdev->stats.tx_errors++; | |
66 | } | |
6f12fdfa | 67 | return NETDEV_TX_OK; |
ccb1352e JG |
68 | } |
69 | ||
70 | static int internal_dev_open(struct net_device *netdev) | |
71 | { | |
72 | netif_start_queue(netdev); | |
73 | return 0; | |
74 | } | |
75 | ||
76 | static int internal_dev_stop(struct net_device *netdev) | |
77 | { | |
78 | netif_stop_queue(netdev); | |
79 | return 0; | |
80 | } | |
81 | ||
82 | static void internal_dev_getinfo(struct net_device *netdev, | |
83 | struct ethtool_drvinfo *info) | |
84 | { | |
7826d43f | 85 | strlcpy(info->driver, "openvswitch", sizeof(info->driver)); |
ccb1352e JG |
86 | } |
87 | ||
88 | static const struct ethtool_ops internal_dev_ethtool_ops = { | |
89 | .get_drvinfo = internal_dev_getinfo, | |
90 | .get_link = ethtool_op_get_link, | |
91 | }; | |
92 | ||
ccb1352e JG |
93 | static void internal_dev_destructor(struct net_device *dev) |
94 | { | |
95 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
96 | ||
97 | ovs_vport_free(vport); | |
ccb1352e JG |
98 | } |
99 | ||
bc1f4470 | 100 | static void |
1241365f JM |
101 | internal_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats) |
102 | { | |
103 | int i; | |
104 | ||
105 | memset(stats, 0, sizeof(*stats)); | |
106 | stats->rx_errors = dev->stats.rx_errors; | |
107 | stats->tx_errors = dev->stats.tx_errors; | |
108 | stats->tx_dropped = dev->stats.tx_dropped; | |
109 | stats->rx_dropped = dev->stats.rx_dropped; | |
110 | ||
111 | for_each_possible_cpu(i) { | |
112 | const struct pcpu_sw_netstats *percpu_stats; | |
113 | struct pcpu_sw_netstats local_stats; | |
114 | unsigned int start; | |
115 | ||
116 | percpu_stats = per_cpu_ptr(dev->tstats, i); | |
117 | ||
118 | do { | |
119 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); | |
120 | local_stats = *percpu_stats; | |
121 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); | |
122 | ||
123 | stats->rx_bytes += local_stats.rx_bytes; | |
124 | stats->rx_packets += local_stats.rx_packets; | |
125 | stats->tx_bytes += local_stats.tx_bytes; | |
126 | stats->tx_packets += local_stats.tx_packets; | |
127 | } | |
1241365f JM |
128 | } |
129 | ||
e014e846 | 130 | static void internal_set_rx_headroom(struct net_device *dev, int new_hr) |
3a927bc7 | 131 | { |
5ef9f289 | 132 | dev->needed_headroom = new_hr < 0 ? 0 : new_hr; |
3a927bc7 PA |
133 | } |
134 | ||
ccb1352e JG |
135 | static const struct net_device_ops internal_dev_netdev_ops = { |
136 | .ndo_open = internal_dev_open, | |
137 | .ndo_stop = internal_dev_stop, | |
138 | .ndo_start_xmit = internal_dev_xmit, | |
9151991c | 139 | .ndo_set_mac_address = eth_mac_addr, |
1241365f | 140 | .ndo_get_stats64 = internal_get_stats, |
3a927bc7 | 141 | .ndo_set_rx_headroom = internal_set_rx_headroom, |
ccb1352e JG |
142 | }; |
143 | ||
5b9e7e16 JP |
144 | static struct rtnl_link_ops internal_dev_link_ops __read_mostly = { |
145 | .kind = "openvswitch", | |
146 | }; | |
147 | ||
ccb1352e JG |
148 | static void do_setup(struct net_device *netdev) |
149 | { | |
150 | ether_setup(netdev); | |
151 | ||
425df17c JR |
152 | netdev->max_mtu = ETH_MAX_MTU; |
153 | ||
ccb1352e JG |
154 | netdev->netdev_ops = &internal_dev_netdev_ops; |
155 | ||
156 | netdev->priv_flags &= ~IFF_TX_SKB_SHARING; | |
3a927bc7 | 157 | netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_OPENVSWITCH | |
4272cc51 | 158 | IFF_PHONY_HEADROOM | IFF_NO_QUEUE; |
cf124db5 | 159 | netdev->needs_free_netdev = true; |
a6fad75d | 160 | netdev->priv_destructor = NULL; |
7ad24ea4 | 161 | netdev->ethtool_ops = &internal_dev_ethtool_ops; |
5b9e7e16 | 162 | netdev->rtnl_link_ops = &internal_dev_link_ops; |
ccb1352e JG |
163 | |
164 | netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST | | |
f6eec614 PS |
165 | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | |
166 | NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL; | |
ccb1352e JG |
167 | |
168 | netdev->vlan_features = netdev->features; | |
f6eec614 | 169 | netdev->hw_enc_features = netdev->features; |
3145c037 | 170 | netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
ccb1352e | 171 | netdev->hw_features = netdev->features & ~NETIF_F_LLTX; |
f6eec614 | 172 | |
7ce5d222 | 173 | eth_hw_addr_random(netdev); |
ccb1352e JG |
174 | } |
175 | ||
176 | static struct vport *internal_dev_create(const struct vport_parms *parms) | |
177 | { | |
178 | struct vport *vport; | |
ccb1352e | 179 | struct internal_dev *internal_dev; |
9e529f6a | 180 | struct net_device *dev; |
ccb1352e JG |
181 | int err; |
182 | ||
be4ace6e | 183 | vport = ovs_vport_alloc(0, &ovs_internal_vport_ops, parms); |
ccb1352e JG |
184 | if (IS_ERR(vport)) { |
185 | err = PTR_ERR(vport); | |
186 | goto error; | |
187 | } | |
188 | ||
9e529f6a TY |
189 | dev = alloc_netdev(sizeof(struct internal_dev), |
190 | parms->name, NET_NAME_USER, do_setup); | |
191 | vport->dev = dev; | |
be4ace6e | 192 | if (!vport->dev) { |
ccb1352e JG |
193 | err = -ENOMEM; |
194 | goto error_free_vport; | |
195 | } | |
1241365f JM |
196 | vport->dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
197 | if (!vport->dev->tstats) { | |
198 | err = -ENOMEM; | |
199 | goto error_free_netdev; | |
200 | } | |
3a927bc7 | 201 | vport->dev->needed_headroom = vport->dp->max_headroom; |
ccb1352e | 202 | |
be4ace6e TG |
203 | dev_net_set(vport->dev, ovs_dp_get_net(vport->dp)); |
204 | internal_dev = internal_dev_priv(vport->dev); | |
ccb1352e JG |
205 | internal_dev->vport = vport; |
206 | ||
46df7b81 PS |
207 | /* Restrict bridge port to current netns. */ |
208 | if (vport->port_no == OVSP_LOCAL) | |
be4ace6e | 209 | vport->dev->features |= NETIF_F_NETNS_LOCAL; |
46df7b81 | 210 | |
8e4e1713 | 211 | rtnl_lock(); |
be4ace6e | 212 | err = register_netdevice(vport->dev); |
a6fad75d | 213 | if (err) |
1241365f | 214 | goto error_unlock; |
a6fad75d | 215 | vport->dev->priv_destructor = internal_dev_destructor; |
ccb1352e | 216 | |
be4ace6e | 217 | dev_set_promiscuity(vport->dev, 1); |
8e4e1713 | 218 | rtnl_unlock(); |
be4ace6e | 219 | netif_start_queue(vport->dev); |
ccb1352e JG |
220 | |
221 | return vport; | |
222 | ||
1241365f | 223 | error_unlock: |
8e4e1713 | 224 | rtnl_unlock(); |
9e529f6a | 225 | free_percpu(dev->tstats); |
1241365f | 226 | error_free_netdev: |
9e529f6a | 227 | free_netdev(dev); |
ccb1352e | 228 | error_free_vport: |
a6fad75d | 229 | ovs_vport_free(vport); |
ccb1352e JG |
230 | error: |
231 | return ERR_PTR(err); | |
232 | } | |
233 | ||
234 | static void internal_dev_destroy(struct vport *vport) | |
235 | { | |
be4ace6e | 236 | netif_stop_queue(vport->dev); |
8e4e1713 | 237 | rtnl_lock(); |
be4ace6e | 238 | dev_set_promiscuity(vport->dev, -1); |
ccb1352e JG |
239 | |
240 | /* unregister_netdevice() waits for an RCU grace period. */ | |
be4ace6e | 241 | unregister_netdevice(vport->dev); |
1241365f | 242 | free_percpu(vport->dev->tstats); |
8e4e1713 | 243 | rtnl_unlock(); |
ccb1352e JG |
244 | } |
245 | ||
aec15924 | 246 | static netdev_tx_t internal_dev_recv(struct sk_buff *skb) |
ccb1352e | 247 | { |
aec15924 | 248 | struct net_device *netdev = skb->dev; |
8c876639 | 249 | struct pcpu_sw_netstats *stats; |
ccb1352e | 250 | |
e1f9c356 CL |
251 | if (unlikely(!(netdev->flags & IFF_UP))) { |
252 | kfree_skb(skb); | |
8c876639 | 253 | netdev->stats.rx_dropped++; |
aec15924 | 254 | return NETDEV_TX_OK; |
e1f9c356 CL |
255 | } |
256 | ||
7fe99e2d JG |
257 | skb_dst_drop(skb); |
258 | nf_reset(skb); | |
259 | secpath_reset(skb); | |
260 | ||
ccb1352e JG |
261 | skb->pkt_type = PACKET_HOST; |
262 | skb->protocol = eth_type_trans(skb, netdev); | |
b34df5e8 | 263 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
ccb1352e | 264 | |
8c876639 PS |
265 | stats = this_cpu_ptr(netdev->tstats); |
266 | u64_stats_update_begin(&stats->syncp); | |
267 | stats->rx_packets++; | |
268 | stats->rx_bytes += skb->len; | |
269 | u64_stats_update_end(&stats->syncp); | |
ccb1352e | 270 | |
8c876639 | 271 | netif_rx(skb); |
aec15924 | 272 | return NETDEV_TX_OK; |
ccb1352e JG |
273 | } |
274 | ||
62b9c8d0 | 275 | static struct vport_ops ovs_internal_vport_ops = { |
ccb1352e JG |
276 | .type = OVS_VPORT_TYPE_INTERNAL, |
277 | .create = internal_dev_create, | |
278 | .destroy = internal_dev_destroy, | |
ccb1352e JG |
279 | .send = internal_dev_recv, |
280 | }; | |
281 | ||
282 | int ovs_is_internal_dev(const struct net_device *netdev) | |
283 | { | |
284 | return netdev->netdev_ops == &internal_dev_netdev_ops; | |
285 | } | |
286 | ||
287 | struct vport *ovs_internal_dev_get_vport(struct net_device *netdev) | |
288 | { | |
289 | if (!ovs_is_internal_dev(netdev)) | |
290 | return NULL; | |
291 | ||
292 | return internal_dev_priv(netdev)->vport; | |
293 | } | |
5b9e7e16 JP |
294 | |
295 | int ovs_internal_dev_rtnl_link_register(void) | |
296 | { | |
62b9c8d0 TG |
297 | int err; |
298 | ||
299 | err = rtnl_link_register(&internal_dev_link_ops); | |
300 | if (err < 0) | |
301 | return err; | |
302 | ||
303 | err = ovs_vport_ops_register(&ovs_internal_vport_ops); | |
304 | if (err < 0) | |
305 | rtnl_link_unregister(&internal_dev_link_ops); | |
306 | ||
307 | return err; | |
5b9e7e16 JP |
308 | } |
309 | ||
310 | void ovs_internal_dev_rtnl_link_unregister(void) | |
311 | { | |
62b9c8d0 | 312 | ovs_vport_ops_unregister(&ovs_internal_vport_ops); |
5b9e7e16 JP |
313 | rtnl_link_unregister(&internal_dev_link_ops); |
314 | } |