blob: dc81dc619aa2344a5c7912def9d6852fcd37ebda [file] [log] [blame]
Jesse Grossccb13522011-10-25 19:26:31 -07001/*
Pravin B Shelar83c8df22014-09-15 19:20:31 -07002 * Copyright (c) 2007-2014 Nicira, Inc.
Jesse Grossccb13522011-10-25 19:26:31 -07003 *
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
Jesse Grossccb13522011-10-25 19:26:31 -070019#include <linux/etherdevice.h>
20#include <linux/if.h>
21#include <linux/if_vlan.h>
Pravin B Shelar46df7b82012-02-22 19:58:59 -080022#include <linux/jhash.h>
Jesse Grossccb13522011-10-25 19:26:31 -070023#include <linux/kernel.h>
24#include <linux/list.h>
25#include <linux/mutex.h>
26#include <linux/percpu.h>
27#include <linux/rcupdate.h>
28#include <linux/rtnetlink.h>
29#include <linux/compat.h>
Pravin B Shelar46df7b82012-02-22 19:58:59 -080030#include <net/net_namespace.h>
Thomas Graf62b9c8d2014-10-22 17:29:06 +020031#include <linux/module.h>
Jesse Grossccb13522011-10-25 19:26:31 -070032
Pravin B Shelar46df7b82012-02-22 19:58:59 -080033#include "datapath.h"
Jesse Grossccb13522011-10-25 19:26:31 -070034#include "vport.h"
35#include "vport-internal_dev.h"
36
Thomas Graf62b9c8d2014-10-22 17:29:06 +020037static LIST_HEAD(vport_ops_list);
Jesse Grossccb13522011-10-25 19:26:31 -070038
Pravin B Shelar8e4e1712013-04-15 13:23:03 -070039/* Protected by RCU read lock for reading, ovs_mutex for writing. */
Jesse Grossccb13522011-10-25 19:26:31 -070040static struct hlist_head *dev_table;
41#define VPORT_HASH_BUCKETS 1024
42
43/**
44 * ovs_vport_init - initialize vport subsystem
45 *
46 * Called at module load time to initialize the vport subsystem.
47 */
48int ovs_vport_init(void)
49{
50 dev_table = kzalloc(VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
51 GFP_KERNEL);
52 if (!dev_table)
53 return -ENOMEM;
54
55 return 0;
56}
57
58/**
59 * ovs_vport_exit - shutdown vport subsystem
60 *
61 * Called at module exit time to shutdown the vport subsystem.
62 */
63void ovs_vport_exit(void)
64{
65 kfree(dev_table);
66}
67
Thomas Graf12eb18f2014-11-06 06:58:52 -080068static struct hlist_head *hash_bucket(const struct net *net, const char *name)
Jesse Grossccb13522011-10-25 19:26:31 -070069{
Pravin B Shelar46df7b82012-02-22 19:58:59 -080070 unsigned int hash = jhash(name, strlen(name), (unsigned long) net);
Jesse Grossccb13522011-10-25 19:26:31 -070071 return &dev_table[hash & (VPORT_HASH_BUCKETS - 1)];
72}
73
Thomas Graf62b9c8d2014-10-22 17:29:06 +020074int ovs_vport_ops_register(struct vport_ops *ops)
75{
76 int err = -EEXIST;
77 struct vport_ops *o;
78
79 ovs_lock();
80 list_for_each_entry(o, &vport_ops_list, list)
81 if (ops->type == o->type)
82 goto errout;
83
84 list_add_tail(&ops->list, &vport_ops_list);
85 err = 0;
86errout:
87 ovs_unlock();
88 return err;
89}
Pravin B Shelar9ba559d2014-11-06 06:44:27 -080090EXPORT_SYMBOL_GPL(ovs_vport_ops_register);
Thomas Graf62b9c8d2014-10-22 17:29:06 +020091
92void ovs_vport_ops_unregister(struct vport_ops *ops)
93{
94 ovs_lock();
95 list_del(&ops->list);
96 ovs_unlock();
97}
Pravin B Shelar9ba559d2014-11-06 06:44:27 -080098EXPORT_SYMBOL_GPL(ovs_vport_ops_unregister);
Thomas Graf62b9c8d2014-10-22 17:29:06 +020099
Jesse Grossccb13522011-10-25 19:26:31 -0700100/**
101 * ovs_vport_locate - find a port that has already been created
102 *
103 * @name: name of port to find
104 *
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700105 * Must be called with ovs or RCU read lock.
Jesse Grossccb13522011-10-25 19:26:31 -0700106 */
Thomas Graf12eb18f2014-11-06 06:58:52 -0800107struct vport *ovs_vport_locate(const struct net *net, const char *name)
Jesse Grossccb13522011-10-25 19:26:31 -0700108{
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800109 struct hlist_head *bucket = hash_bucket(net, name);
Jesse Grossccb13522011-10-25 19:26:31 -0700110 struct vport *vport;
Jesse Grossccb13522011-10-25 19:26:31 -0700111
Sasha Levinb67bfe02013-02-27 17:06:00 -0800112 hlist_for_each_entry_rcu(vport, bucket, hash_node)
Thomas Grafc9db9652015-07-21 10:44:05 +0200113 if (!strcmp(name, ovs_vport_name(vport)) &&
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800114 net_eq(ovs_dp_get_net(vport->dp), net))
Jesse Grossccb13522011-10-25 19:26:31 -0700115 return vport;
116
117 return NULL;
118}
119
120/**
121 * ovs_vport_alloc - allocate and initialize new vport
122 *
123 * @priv_size: Size of private data area to allocate.
124 * @ops: vport device ops
125 *
126 * Allocate and initialize a new vport defined by @ops. The vport will contain
127 * a private data area of size @priv_size that can be accessed using
128 * vport_priv(). vports that are no longer needed should be released with
129 * vport_free().
130 */
131struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops,
132 const struct vport_parms *parms)
133{
134 struct vport *vport;
135 size_t alloc_size;
136
137 alloc_size = sizeof(struct vport);
138 if (priv_size) {
139 alloc_size = ALIGN(alloc_size, VPORT_ALIGN);
140 alloc_size += priv_size;
141 }
142
143 vport = kzalloc(alloc_size, GFP_KERNEL);
144 if (!vport)
145 return ERR_PTR(-ENOMEM);
146
147 vport->dp = parms->dp;
148 vport->port_no = parms->port_no;
Jesse Grossccb13522011-10-25 19:26:31 -0700149 vport->ops = ops;
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700150 INIT_HLIST_NODE(&vport->dp_hash_node);
Jesse Grossccb13522011-10-25 19:26:31 -0700151
Christoph Jaeger3791b3f2014-08-12 09:27:57 +0200152 if (ovs_vport_set_upcall_portids(vport, parms->upcall_portids)) {
153 kfree(vport);
Alex Wang5cd667b2014-07-17 15:14:13 -0700154 return ERR_PTR(-EINVAL);
Christoph Jaeger3791b3f2014-08-12 09:27:57 +0200155 }
Alex Wang5cd667b2014-07-17 15:14:13 -0700156
Jesse Grossccb13522011-10-25 19:26:31 -0700157 return vport;
158}
Pravin B Shelar9ba559d2014-11-06 06:44:27 -0800159EXPORT_SYMBOL_GPL(ovs_vport_alloc);
Jesse Grossccb13522011-10-25 19:26:31 -0700160
161/**
162 * ovs_vport_free - uninitialize and free vport
163 *
164 * @vport: vport to free
165 *
166 * Frees a vport allocated with vport_alloc() when it is no longer needed.
167 *
168 * The caller must ensure that an RCU grace period has passed since the last
169 * time @vport was in a datapath.
170 */
171void ovs_vport_free(struct vport *vport)
172{
Alex Wang5cd667b2014-07-17 15:14:13 -0700173 /* vport is freed from RCU callback or error path, Therefore
174 * it is safe to use raw dereference.
175 */
176 kfree(rcu_dereference_raw(vport->upcall_portids));
Jesse Grossccb13522011-10-25 19:26:31 -0700177 kfree(vport);
178}
Pravin B Shelar9ba559d2014-11-06 06:44:27 -0800179EXPORT_SYMBOL_GPL(ovs_vport_free);
Thomas Graf62b9c8d2014-10-22 17:29:06 +0200180
181static struct vport_ops *ovs_vport_lookup(const struct vport_parms *parms)
182{
183 struct vport_ops *ops;
184
185 list_for_each_entry(ops, &vport_ops_list, list)
186 if (ops->type == parms->type)
187 return ops;
188
189 return NULL;
190}
Jesse Grossccb13522011-10-25 19:26:31 -0700191
192/**
193 * ovs_vport_add - add vport device (for kernel callers)
194 *
195 * @parms: Information about new vport.
196 *
197 * Creates a new vport with the specified configuration (which is dependent on
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700198 * device type). ovs_mutex must be held.
Jesse Grossccb13522011-10-25 19:26:31 -0700199 */
200struct vport *ovs_vport_add(const struct vport_parms *parms)
201{
Thomas Graf62b9c8d2014-10-22 17:29:06 +0200202 struct vport_ops *ops;
Jesse Grossccb13522011-10-25 19:26:31 -0700203 struct vport *vport;
Jesse Grossccb13522011-10-25 19:26:31 -0700204
Thomas Graf62b9c8d2014-10-22 17:29:06 +0200205 ops = ovs_vport_lookup(parms);
206 if (ops) {
207 struct hlist_head *bucket;
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800208
Thomas Graf62b9c8d2014-10-22 17:29:06 +0200209 if (!try_module_get(ops->owner))
210 return ERR_PTR(-EAFNOSUPPORT);
Jesse Grossccb13522011-10-25 19:26:31 -0700211
Thomas Graf62b9c8d2014-10-22 17:29:06 +0200212 vport = ops->create(parms);
213 if (IS_ERR(vport)) {
214 module_put(ops->owner);
Jesse Grossccb13522011-10-25 19:26:31 -0700215 return vport;
216 }
Thomas Graf62b9c8d2014-10-22 17:29:06 +0200217
218 bucket = hash_bucket(ovs_dp_get_net(vport->dp),
Thomas Grafc9db9652015-07-21 10:44:05 +0200219 ovs_vport_name(vport));
Thomas Graf62b9c8d2014-10-22 17:29:06 +0200220 hlist_add_head_rcu(&vport->hash_node, bucket);
221 return vport;
Jesse Grossccb13522011-10-25 19:26:31 -0700222 }
223
Thomas Graf62b9c8d2014-10-22 17:29:06 +0200224 /* Unlock to attempt module load and return -EAGAIN if load
225 * was successful as we need to restart the port addition
226 * workflow.
227 */
228 ovs_unlock();
229 request_module("vport-type-%d", parms->type);
230 ovs_lock();
Jesse Grossccb13522011-10-25 19:26:31 -0700231
Thomas Graf62b9c8d2014-10-22 17:29:06 +0200232 if (!ovs_vport_lookup(parms))
233 return ERR_PTR(-EAFNOSUPPORT);
234 else
235 return ERR_PTR(-EAGAIN);
Jesse Grossccb13522011-10-25 19:26:31 -0700236}
237
238/**
239 * ovs_vport_set_options - modify existing vport device (for kernel callers)
240 *
241 * @vport: vport to modify.
Justin Pettit26948382013-08-19 17:49:29 -0700242 * @options: New configuration.
Jesse Grossccb13522011-10-25 19:26:31 -0700243 *
244 * Modifies an existing device with the specified configuration (which is
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700245 * dependent on device type). ovs_mutex must be held.
Jesse Grossccb13522011-10-25 19:26:31 -0700246 */
247int ovs_vport_set_options(struct vport *vport, struct nlattr *options)
248{
Jesse Grossccb13522011-10-25 19:26:31 -0700249 if (!vport->ops->set_options)
250 return -EOPNOTSUPP;
251 return vport->ops->set_options(vport, options);
252}
253
254/**
255 * ovs_vport_del - delete existing vport device
256 *
257 * @vport: vport to delete.
258 *
259 * Detaches @vport from its datapath and destroys it. It is possible to fail
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700260 * for reasons such as lack of memory. ovs_mutex must be held.
Jesse Grossccb13522011-10-25 19:26:31 -0700261 */
262void ovs_vport_del(struct vport *vport)
263{
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700264 ASSERT_OVSL();
Jesse Grossccb13522011-10-25 19:26:31 -0700265
266 hlist_del_rcu(&vport->hash_node);
Thomas Graf62b9c8d2014-10-22 17:29:06 +0200267 module_put(vport->ops->owner);
Thomas Graffa2d8ff2015-03-30 13:57:41 +0200268 vport->ops->destroy(vport);
Jesse Grossccb13522011-10-25 19:26:31 -0700269}
270
271/**
272 * ovs_vport_get_stats - retrieve device stats
273 *
274 * @vport: vport from which to retrieve the stats
275 * @stats: location to store stats
276 *
277 * Retrieves transmit, receive, and error stats for the given device.
278 *
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700279 * Must be called with ovs_mutex or rcu_read_lock.
Jesse Grossccb13522011-10-25 19:26:31 -0700280 */
281void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats)
282{
Pravin B Shelar8c876632015-08-29 17:44:07 -0700283 struct net_device *dev = vport->dev;
Jesse Grossccb13522011-10-25 19:26:31 -0700284 int i;
285
286 memset(stats, 0, sizeof(*stats));
Pravin B Shelar8c876632015-08-29 17:44:07 -0700287 stats->rx_errors = dev->stats.rx_errors;
288 stats->tx_errors = dev->stats.tx_errors;
289 stats->tx_dropped = dev->stats.tx_dropped;
290 stats->rx_dropped = dev->stats.rx_dropped;
Jesse Grossccb13522011-10-25 19:26:31 -0700291
Pravin B Shelar8c876632015-08-29 17:44:07 -0700292 stats->rx_dropped += atomic_long_read(&dev->rx_dropped);
293 stats->tx_dropped += atomic_long_read(&dev->tx_dropped);
Jesse Grossccb13522011-10-25 19:26:31 -0700294
295 for_each_possible_cpu(i) {
Li RongQing8f849852014-01-04 13:57:59 +0800296 const struct pcpu_sw_netstats *percpu_stats;
297 struct pcpu_sw_netstats local_stats;
Jesse Grossccb13522011-10-25 19:26:31 -0700298 unsigned int start;
299
Pravin B Shelar8c876632015-08-29 17:44:07 -0700300 percpu_stats = per_cpu_ptr(dev->tstats, i);
Jesse Grossccb13522011-10-25 19:26:31 -0700301
302 do {
Eric W. Biederman57a77442014-03-13 21:26:42 -0700303 start = u64_stats_fetch_begin_irq(&percpu_stats->syncp);
Jesse Grossccb13522011-10-25 19:26:31 -0700304 local_stats = *percpu_stats;
Eric W. Biederman57a77442014-03-13 21:26:42 -0700305 } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start));
Jesse Grossccb13522011-10-25 19:26:31 -0700306
307 stats->rx_bytes += local_stats.rx_bytes;
308 stats->rx_packets += local_stats.rx_packets;
309 stats->tx_bytes += local_stats.tx_bytes;
310 stats->tx_packets += local_stats.tx_packets;
311 }
312}
313
314/**
315 * ovs_vport_get_options - retrieve device options
316 *
317 * @vport: vport from which to retrieve the options.
318 * @skb: sk_buff where options should be appended.
319 *
320 * Retrieves the configuration of the given device, appending an
321 * %OVS_VPORT_ATTR_OPTIONS attribute that in turn contains nested
322 * vport-specific attributes to @skb.
323 *
324 * Returns 0 if successful, -EMSGSIZE if @skb has insufficient room, or another
325 * negative error code if a real error occurred. If an error occurs, @skb is
326 * left unmodified.
327 *
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700328 * Must be called with ovs_mutex or rcu_read_lock.
Jesse Grossccb13522011-10-25 19:26:31 -0700329 */
330int ovs_vport_get_options(const struct vport *vport, struct sk_buff *skb)
331{
332 struct nlattr *nla;
Thomas Graf5d963352013-04-03 00:30:43 +0200333 int err;
334
335 if (!vport->ops->get_options)
336 return 0;
Jesse Grossccb13522011-10-25 19:26:31 -0700337
338 nla = nla_nest_start(skb, OVS_VPORT_ATTR_OPTIONS);
339 if (!nla)
340 return -EMSGSIZE;
341
Thomas Graf5d963352013-04-03 00:30:43 +0200342 err = vport->ops->get_options(vport, skb);
343 if (err) {
344 nla_nest_cancel(skb, nla);
345 return err;
Jesse Grossccb13522011-10-25 19:26:31 -0700346 }
347
348 nla_nest_end(skb, nla);
349 return 0;
350}
351
352/**
Alex Wang5cd667b2014-07-17 15:14:13 -0700353 * ovs_vport_set_upcall_portids - set upcall portids of @vport.
354 *
355 * @vport: vport to modify.
356 * @ids: new configuration, an array of port ids.
357 *
358 * Sets the vport's upcall_portids to @ids.
359 *
360 * Returns 0 if successful, -EINVAL if @ids is zero length or cannot be parsed
361 * as an array of U32.
362 *
363 * Must be called with ovs_mutex.
364 */
Thomas Graf12eb18f2014-11-06 06:58:52 -0800365int ovs_vport_set_upcall_portids(struct vport *vport, const struct nlattr *ids)
Alex Wang5cd667b2014-07-17 15:14:13 -0700366{
367 struct vport_portids *old, *vport_portids;
368
369 if (!nla_len(ids) || nla_len(ids) % sizeof(u32))
370 return -EINVAL;
371
372 old = ovsl_dereference(vport->upcall_portids);
373
374 vport_portids = kmalloc(sizeof(*vport_portids) + nla_len(ids),
375 GFP_KERNEL);
376 if (!vport_portids)
377 return -ENOMEM;
378
379 vport_portids->n_ids = nla_len(ids) / sizeof(u32);
380 vport_portids->rn_ids = reciprocal_value(vport_portids->n_ids);
381 nla_memcpy(vport_portids->ids, ids, nla_len(ids));
382
383 rcu_assign_pointer(vport->upcall_portids, vport_portids);
384
385 if (old)
386 kfree_rcu(old, rcu);
387 return 0;
388}
389
390/**
391 * ovs_vport_get_upcall_portids - get the upcall_portids of @vport.
392 *
393 * @vport: vport from which to retrieve the portids.
394 * @skb: sk_buff where portids should be appended.
395 *
396 * Retrieves the configuration of the given vport, appending the
397 * %OVS_VPORT_ATTR_UPCALL_PID attribute which is the array of upcall
398 * portids to @skb.
399 *
400 * Returns 0 if successful, -EMSGSIZE if @skb has insufficient room.
401 * If an error occurs, @skb is left unmodified. Must be called with
402 * ovs_mutex or rcu_read_lock.
403 */
404int ovs_vport_get_upcall_portids(const struct vport *vport,
405 struct sk_buff *skb)
406{
407 struct vport_portids *ids;
408
409 ids = rcu_dereference_ovsl(vport->upcall_portids);
410
411 if (vport->dp->user_features & OVS_DP_F_VPORT_PIDS)
412 return nla_put(skb, OVS_VPORT_ATTR_UPCALL_PID,
413 ids->n_ids * sizeof(u32), (void *)ids->ids);
414 else
415 return nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, ids->ids[0]);
416}
417
418/**
419 * ovs_vport_find_upcall_portid - find the upcall portid to send upcall.
420 *
421 * @vport: vport from which the missed packet is received.
422 * @skb: skb that the missed packet was received.
423 *
424 * Uses the skb_get_hash() to select the upcall portid to send the
425 * upcall.
426 *
427 * Returns the portid of the target socket. Must be called with rcu_read_lock.
428 */
Fabian Frederick4e8febd2014-10-15 21:03:41 +0200429u32 ovs_vport_find_upcall_portid(const struct vport *vport, struct sk_buff *skb)
Alex Wang5cd667b2014-07-17 15:14:13 -0700430{
431 struct vport_portids *ids;
432 u32 ids_index;
433 u32 hash;
434
Fabian Frederick4e8febd2014-10-15 21:03:41 +0200435 ids = rcu_dereference(vport->upcall_portids);
Alex Wang5cd667b2014-07-17 15:14:13 -0700436
437 if (ids->n_ids == 1 && ids->ids[0] == 0)
438 return 0;
439
440 hash = skb_get_hash(skb);
441 ids_index = hash - ids->n_ids * reciprocal_divide(hash, ids->rn_ids);
442 return ids->ids[ids_index];
443}
444
445/**
Jesse Grossccb13522011-10-25 19:26:31 -0700446 * ovs_vport_receive - pass up received packet to the datapath for processing
447 *
448 * @vport: vport that received the packet
449 * @skb: skb that was received
Justin Pettit26948382013-08-19 17:49:29 -0700450 * @tun_key: tunnel (if any) that carried packet
Jesse Grossccb13522011-10-25 19:26:31 -0700451 *
452 * Must be called with rcu_read_lock. The packet cannot be shared and
Cong Wangd176ca22013-02-22 19:41:26 +0800453 * skb->data should point to the Ethernet header.
Jesse Grossccb13522011-10-25 19:26:31 -0700454 */
Pravin B Shelar8c876632015-08-29 17:44:07 -0700455int ovs_vport_receive(struct vport *vport, struct sk_buff *skb,
456 const struct ip_tunnel_info *tun_info)
Jesse Grossccb13522011-10-25 19:26:31 -0700457{
Pravin B Shelar8c8b1b82014-09-15 19:28:44 -0700458 struct sw_flow_key key;
459 int error;
Jesse Grossccb13522011-10-25 19:26:31 -0700460
Pravin B Shelar83c8df22014-09-15 19:20:31 -0700461 OVS_CB(skb)->input_vport = vport;
Joe Stringer7f8a4362015-08-26 11:31:48 -0700462 OVS_CB(skb)->mru = 0;
Pravin B Shelar8c8b1b82014-09-15 19:28:44 -0700463 /* Extract flow from 'skb' into 'key'. */
Jesse Grossf0b128c2014-10-03 15:35:31 -0700464 error = ovs_flow_key_extract(tun_info, skb, &key);
Pravin B Shelar8c8b1b82014-09-15 19:28:44 -0700465 if (unlikely(error)) {
466 kfree_skb(skb);
Pravin B Shelar8c876632015-08-29 17:44:07 -0700467 return error;
Pravin B Shelar8c8b1b82014-09-15 19:28:44 -0700468 }
469 ovs_dp_process_packet(skb, &key);
Pravin B Shelar8c876632015-08-29 17:44:07 -0700470 return 0;
Jesse Grossccb13522011-10-25 19:26:31 -0700471}
Pravin B Shelar9ba559d2014-11-06 06:44:27 -0800472EXPORT_SYMBOL_GPL(ovs_vport_receive);
Jesse Grossccb13522011-10-25 19:26:31 -0700473
Pravin B Shelaraa310702013-06-17 17:50:33 -0700474static void free_vport_rcu(struct rcu_head *rcu)
475{
476 struct vport *vport = container_of(rcu, struct vport, rcu);
477
478 ovs_vport_free(vport);
479}
480
481void ovs_vport_deferred_free(struct vport *vport)
482{
483 if (!vport)
484 return;
485
486 call_rcu(&vport->rcu, free_vport_rcu);
487}
Pravin B Shelar9ba559d2014-11-06 06:44:27 -0800488EXPORT_SYMBOL_GPL(ovs_vport_deferred_free);
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800489
Pravin B Shelar4c222792015-08-30 18:09:38 -0700490int ovs_tunnel_get_egress_info(struct dp_upcall_info *upcall,
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800491 struct net *net,
Pravin B Shelar3eedb412015-08-29 17:44:06 -0700492 struct sk_buff *skb,
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800493 u8 ipproto,
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800494 __be16 tp_src,
495 __be16 tp_dst)
496{
Pravin B Shelar4c222792015-08-30 18:09:38 -0700497 struct ip_tunnel_info *egress_tun_info = upcall->egress_tun_info;
Pravin B Shelar3eedb412015-08-29 17:44:06 -0700498 const struct ip_tunnel_info *tun_info = skb_tunnel_info(skb);
Thomas Graf1d8fff92015-07-21 10:43:54 +0200499 const struct ip_tunnel_key *tun_key;
Pravin B Shelar3eedb412015-08-29 17:44:06 -0700500 u32 skb_mark = skb->mark;
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800501 struct rtable *rt;
502 struct flowi4 fl;
503
504 if (unlikely(!tun_info))
505 return -EINVAL;
Jiri Benc7f9562a2015-08-28 20:48:20 +0200506 if (ip_tunnel_info_af(tun_info) != AF_INET)
507 return -EINVAL;
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800508
Thomas Graf1d8fff92015-07-21 10:43:54 +0200509 tun_key = &tun_info->key;
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800510
511 /* Route lookup to get srouce IP address.
512 * The process may need to be changed if the corresponding process
513 * in vports ops changed.
514 */
Fan Du3f4c1d82015-01-14 13:10:35 +0800515 rt = ovs_tunnel_route_lookup(net, tun_key, skb_mark, &fl, ipproto);
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800516 if (IS_ERR(rt))
517 return PTR_ERR(rt);
518
519 ip_rt_put(rt);
520
521 /* Generate egress_tun_info based on tun_info,
522 * saddr, tp_src and tp_dst
523 */
Pravin B Shelar4c222792015-08-30 18:09:38 -0700524 ip_tunnel_key_init(&egress_tun_info->key,
525 fl.saddr, tun_key->u.ipv4.dst,
526 tun_key->tos,
527 tun_key->ttl,
528 tp_src, tp_dst,
529 tun_key->tun_id,
530 tun_key->tun_flags);
531 egress_tun_info->options_len = tun_info->options_len;
532 egress_tun_info->mode = tun_info->mode;
533 upcall->egress_tun_opts = ip_tunnel_info_opts(egress_tun_info);
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800534 return 0;
535}
536EXPORT_SYMBOL_GPL(ovs_tunnel_get_egress_info);
537
538int ovs_vport_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,
Pravin B Shelar4c222792015-08-30 18:09:38 -0700539 struct dp_upcall_info *upcall)
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800540{
541 /* get_egress_tun_info() is only implemented on tunnel ports. */
542 if (unlikely(!vport->ops->get_egress_tun_info))
543 return -EINVAL;
544
Pravin B Shelar4c222792015-08-30 18:09:38 -0700545 return vport->ops->get_egress_tun_info(vport, skb, upcall);
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800546}