~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/net/openvswitch/vport-internal_dev.c

Version: ~ [ linux-5.11-rc3 ] ~ [ linux-5.10.7 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.89 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.167 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.215 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.251 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.251 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * Copyright (c) 2007-2012 Nicira, Inc.
  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>
 26 
 27 #include <net/dst.h>
 28 #include <net/xfrm.h>
 29 #include <net/rtnetlink.h>
 30 
 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 vport_ops ovs_internal_vport_ops;
 40 
 41 static struct internal_dev *internal_dev_priv(struct net_device *netdev)
 42 {
 43         return netdev_priv(netdev);
 44 }
 45 
 46 /* This function is only called by the kernel network layer.*/
 47 static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev,
 48                                                         struct rtnl_link_stats64 *stats)
 49 {
 50         struct vport *vport = ovs_internal_dev_get_vport(netdev);
 51         struct ovs_vport_stats vport_stats;
 52 
 53         ovs_vport_get_stats(vport, &vport_stats);
 54 
 55         /* The tx and rx stats need to be swapped because the
 56          * switch and host OS have opposite perspectives. */
 57         stats->rx_packets       = vport_stats.tx_packets;
 58         stats->tx_packets       = vport_stats.rx_packets;
 59         stats->rx_bytes         = vport_stats.tx_bytes;
 60         stats->tx_bytes         = vport_stats.rx_bytes;
 61         stats->rx_errors        = vport_stats.tx_errors;
 62         stats->tx_errors        = vport_stats.rx_errors;
 63         stats->rx_dropped       = vport_stats.tx_dropped;
 64         stats->tx_dropped       = vport_stats.rx_dropped;
 65 
 66         return stats;
 67 }
 68 
 69 /* Called with rcu_read_lock_bh. */
 70 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
 71 {
 72         rcu_read_lock();
 73         ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
 74         rcu_read_unlock();
 75         return 0;
 76 }
 77 
 78 static int internal_dev_open(struct net_device *netdev)
 79 {
 80         netif_start_queue(netdev);
 81         return 0;
 82 }
 83 
 84 static int internal_dev_stop(struct net_device *netdev)
 85 {
 86         netif_stop_queue(netdev);
 87         return 0;
 88 }
 89 
 90 static void internal_dev_getinfo(struct net_device *netdev,
 91                                  struct ethtool_drvinfo *info)
 92 {
 93         strlcpy(info->driver, "openvswitch", sizeof(info->driver));
 94 }
 95 
 96 static const struct ethtool_ops internal_dev_ethtool_ops = {
 97         .get_drvinfo    = internal_dev_getinfo,
 98         .get_link       = ethtool_op_get_link,
 99 };
100 
101 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
102 {
103         if (new_mtu < 68)
104                 return -EINVAL;
105 
106         netdev->mtu = new_mtu;
107         return 0;
108 }
109 
110 static void internal_dev_destructor(struct net_device *dev)
111 {
112         struct vport *vport = ovs_internal_dev_get_vport(dev);
113 
114         ovs_vport_free(vport);
115         free_netdev(dev);
116 }
117 
118 static const struct net_device_ops internal_dev_netdev_ops = {
119         .ndo_open = internal_dev_open,
120         .ndo_stop = internal_dev_stop,
121         .ndo_start_xmit = internal_dev_xmit,
122         .ndo_set_mac_address = eth_mac_addr,
123         .ndo_change_mtu = internal_dev_change_mtu,
124         .ndo_get_stats64 = internal_dev_get_stats,
125 };
126 
127 static struct rtnl_link_ops internal_dev_link_ops __read_mostly = {
128         .kind = "openvswitch",
129 };
130 
131 static void do_setup(struct net_device *netdev)
132 {
133         ether_setup(netdev);
134 
135         netdev->netdev_ops = &internal_dev_netdev_ops;
136 
137         netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
138         netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
139         netdev->destructor = internal_dev_destructor;
140         netdev->ethtool_ops = &internal_dev_ethtool_ops;
141         netdev->rtnl_link_ops = &internal_dev_link_ops;
142         netdev->tx_queue_len = 0;
143 
144         netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
145                            NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
146                            NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL;
147 
148         netdev->vlan_features = netdev->features;
149         netdev->hw_enc_features = netdev->features;
150         netdev->features |= NETIF_F_HW_VLAN_CTAG_TX;
151         netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
152 
153         eth_hw_addr_random(netdev);
154 }
155 
156 static struct vport *internal_dev_create(const struct vport_parms *parms)
157 {
158         struct vport *vport;
159         struct netdev_vport *netdev_vport;
160         struct internal_dev *internal_dev;
161         int err;
162 
163         vport = ovs_vport_alloc(sizeof(struct netdev_vport),
164                                 &ovs_internal_vport_ops, parms);
165         if (IS_ERR(vport)) {
166                 err = PTR_ERR(vport);
167                 goto error;
168         }
169 
170         netdev_vport = netdev_vport_priv(vport);
171 
172         netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev),
173                                          parms->name, NET_NAME_UNKNOWN,
174                                          do_setup);
175         if (!netdev_vport->dev) {
176                 err = -ENOMEM;
177                 goto error_free_vport;
178         }
179 
180         dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp));
181         internal_dev = internal_dev_priv(netdev_vport->dev);
182         internal_dev->vport = vport;
183 
184         /* Restrict bridge port to current netns. */
185         if (vport->port_no == OVSP_LOCAL)
186                 netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL;
187 
188         rtnl_lock();
189         err = register_netdevice(netdev_vport->dev);
190         if (err)
191                 goto error_free_netdev;
192 
193         dev_set_promiscuity(netdev_vport->dev, 1);
194         rtnl_unlock();
195         netif_start_queue(netdev_vport->dev);
196 
197         return vport;
198 
199 error_free_netdev:
200         rtnl_unlock();
201         free_netdev(netdev_vport->dev);
202 error_free_vport:
203         ovs_vport_free(vport);
204 error:
205         return ERR_PTR(err);
206 }
207 
208 static void internal_dev_destroy(struct vport *vport)
209 {
210         struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
211 
212         netif_stop_queue(netdev_vport->dev);
213         rtnl_lock();
214         dev_set_promiscuity(netdev_vport->dev, -1);
215 
216         /* unregister_netdevice() waits for an RCU grace period. */
217         unregister_netdevice(netdev_vport->dev);
218 
219         rtnl_unlock();
220 }
221 
222 static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
223 {
224         struct net_device *netdev = netdev_vport_priv(vport)->dev;
225         int len;
226 
227         if (unlikely(!(netdev->flags & IFF_UP))) {
228                 kfree_skb(skb);
229                 return 0;
230         }
231 
232         len = skb->len;
233 
234         skb_dst_drop(skb);
235         nf_reset(skb);
236         secpath_reset(skb);
237 
238         skb->dev = netdev;
239         skb->pkt_type = PACKET_HOST;
240         skb->protocol = eth_type_trans(skb, netdev);
241         skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
242 
243         netif_rx(skb);
244 
245         return len;
246 }
247 
248 static struct vport_ops ovs_internal_vport_ops = {
249         .type           = OVS_VPORT_TYPE_INTERNAL,
250         .create         = internal_dev_create,
251         .destroy        = internal_dev_destroy,
252         .get_name       = ovs_netdev_get_name,
253         .send           = internal_dev_recv,
254 };
255 
256 int ovs_is_internal_dev(const struct net_device *netdev)
257 {
258         return netdev->netdev_ops == &internal_dev_netdev_ops;
259 }
260 
261 struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
262 {
263         if (!ovs_is_internal_dev(netdev))
264                 return NULL;
265 
266         return internal_dev_priv(netdev)->vport;
267 }
268 
269 int ovs_internal_dev_rtnl_link_register(void)
270 {
271         int err;
272 
273         err = rtnl_link_register(&internal_dev_link_ops);
274         if (err < 0)
275                 return err;
276 
277         err = ovs_vport_ops_register(&ovs_internal_vport_ops);
278         if (err < 0)
279                 rtnl_link_unregister(&internal_dev_link_ops);
280 
281         return err;
282 }
283 
284 void ovs_internal_dev_rtnl_link_unregister(void)
285 {
286         ovs_vport_ops_unregister(&ovs_internal_vport_ops);
287         rtnl_link_unregister(&internal_dev_link_ops);
288 }
289 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp