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f2459fe7 | 1 | /* |
e23775f2 | 2 | * Copyright (c) 2007-2015 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 | ||
f2459fe7 JG |
19 | #include <linux/etherdevice.h> |
20 | #include <linux/if.h> | |
38aeef15 | 21 | #include <linux/if_vlan.h> |
2a4999f3 | 22 | #include <linux/jhash.h> |
f2459fe7 JG |
23 | #include <linux/kernel.h> |
24 | #include <linux/list.h> | |
25 | #include <linux/mutex.h> | |
26 | #include <linux/percpu.h> | |
057dd6d2 | 27 | #include <linux/rcupdate.h> |
f2459fe7 | 28 | #include <linux/rtnetlink.h> |
3fbd517a | 29 | #include <linux/compat.h> |
e23775f2 PS |
30 | #include <linux/module.h> |
31 | #include <linux/if_link.h> | |
2a4999f3 | 32 | #include <net/net_namespace.h> |
e23775f2 PS |
33 | #include <net/lisp.h> |
34 | #include <net/gre.h> | |
35 | #include <net/geneve.h> | |
e23775f2 | 36 | #include <net/stt.h> |
8063e095 | 37 | #include <net/vxlan.h> |
f2459fe7 | 38 | |
2a4999f3 | 39 | #include "datapath.h" |
c450371e | 40 | #include "gso.h" |
f2459fe7 | 41 | #include "vport.h" |
b19e8815 | 42 | #include "vport-internal_dev.h" |
f2459fe7 | 43 | |
5a38795f | 44 | static LIST_HEAD(vport_ops_list); |
f2459fe7 | 45 | |
cd2a59e9 | 46 | /* Protected by RCU read lock for reading, ovs_mutex for writing. */ |
f2459fe7 JG |
47 | static struct hlist_head *dev_table; |
48 | #define VPORT_HASH_BUCKETS 1024 | |
49 | ||
f2459fe7 | 50 | /** |
850b6b3b | 51 | * ovs_vport_init - initialize vport subsystem |
f2459fe7 | 52 | * |
806b46ef | 53 | * Called at module load time to initialize the vport subsystem. |
f2459fe7 | 54 | */ |
850b6b3b | 55 | int ovs_vport_init(void) |
f2459fe7 | 56 | { |
e23775f2 PS |
57 | int err; |
58 | ||
f2459fe7 JG |
59 | dev_table = kzalloc(VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
60 | GFP_KERNEL); | |
806b46ef PS |
61 | if (!dev_table) |
62 | return -ENOMEM; | |
f2459fe7 | 63 | |
e23775f2 PS |
64 | err = lisp_init_module(); |
65 | if (err) | |
66 | goto err_lisp; | |
67 | err = ipgre_init(); | |
68 | if (err) | |
69 | goto err_gre; | |
70 | err = geneve_init_module(); | |
71 | if (err) | |
72 | goto err_geneve; | |
73 | ||
74 | err = vxlan_init_module(); | |
75 | if (err) | |
76 | goto err_vxlan; | |
77 | err = ovs_stt_init_module(); | |
78 | if (err) | |
79 | goto err_stt; | |
f2459fe7 | 80 | return 0; |
e23775f2 PS |
81 | |
82 | err_stt: | |
83 | vxlan_cleanup_module(); | |
84 | err_vxlan: | |
85 | geneve_cleanup_module(); | |
86 | err_geneve: | |
87 | ipgre_fini(); | |
88 | err_gre: | |
89 | lisp_cleanup_module(); | |
90 | err_lisp: | |
91 | kfree(dev_table); | |
92 | return err; | |
f2459fe7 JG |
93 | } |
94 | ||
f2459fe7 | 95 | /** |
850b6b3b | 96 | * ovs_vport_exit - shutdown vport subsystem |
f2459fe7 | 97 | * |
806b46ef | 98 | * Called at module exit time to shutdown the vport subsystem. |
f2459fe7 | 99 | */ |
850b6b3b | 100 | void ovs_vport_exit(void) |
f2459fe7 | 101 | { |
e23775f2 PS |
102 | ovs_stt_cleanup_module(); |
103 | vxlan_cleanup_module(); | |
104 | geneve_cleanup_module(); | |
105 | ipgre_fini(); | |
106 | lisp_cleanup_module(); | |
f2459fe7 JG |
107 | kfree(dev_table); |
108 | } | |
109 | ||
f1f60b85 | 110 | static struct hlist_head *hash_bucket(const struct net *net, const char *name) |
f2459fe7 | 111 | { |
2a4999f3 | 112 | unsigned int hash = jhash(name, strlen(name), (unsigned long) net); |
f2459fe7 JG |
113 | return &dev_table[hash & (VPORT_HASH_BUCKETS - 1)]; |
114 | } | |
115 | ||
f07995ef | 116 | int __ovs_vport_ops_register(struct vport_ops *ops) |
5a38795f TG |
117 | { |
118 | int err = -EEXIST; | |
119 | struct vport_ops *o; | |
120 | ||
121 | ovs_lock(); | |
122 | list_for_each_entry(o, &vport_ops_list, list) | |
e23775f2 PS |
123 | if (ops->type == o->type) |
124 | goto errout; | |
5a38795f TG |
125 | |
126 | list_add_tail(&ops->list, &vport_ops_list); | |
127 | err = 0; | |
128 | errout: | |
129 | ovs_unlock(); | |
130 | return err; | |
131 | } | |
f07995ef | 132 | EXPORT_SYMBOL_GPL(__ovs_vport_ops_register); |
5a38795f TG |
133 | |
134 | void ovs_vport_ops_unregister(struct vport_ops *ops) | |
135 | { | |
136 | ovs_lock(); | |
137 | list_del(&ops->list); | |
138 | ovs_unlock(); | |
139 | } | |
140 | EXPORT_SYMBOL_GPL(ovs_vport_ops_unregister); | |
141 | ||
f2459fe7 | 142 | /** |
850b6b3b | 143 | * ovs_vport_locate - find a port that has already been created |
f2459fe7 JG |
144 | * |
145 | * @name: name of port to find | |
146 | * | |
cd2a59e9 | 147 | * Must be called with ovs or RCU read lock. |
f2459fe7 | 148 | */ |
f1f60b85 | 149 | struct vport *ovs_vport_locate(const struct net *net, const char *name) |
f2459fe7 | 150 | { |
2a4999f3 | 151 | struct hlist_head *bucket = hash_bucket(net, name); |
f2459fe7 | 152 | struct vport *vport; |
f2459fe7 | 153 | |
f8dfbcb7 | 154 | hlist_for_each_entry_rcu(vport, bucket, hash_node) |
e23775f2 | 155 | if (!strcmp(name, ovs_vport_name(vport)) && |
2a4999f3 | 156 | net_eq(ovs_dp_get_net(vport->dp), net)) |
057dd6d2 | 157 | return vport; |
f2459fe7 | 158 | |
057dd6d2 | 159 | return NULL; |
f2459fe7 JG |
160 | } |
161 | ||
162 | /** | |
850b6b3b | 163 | * ovs_vport_alloc - allocate and initialize new vport |
f2459fe7 JG |
164 | * |
165 | * @priv_size: Size of private data area to allocate. | |
166 | * @ops: vport device ops | |
167 | * | |
168 | * Allocate and initialize a new vport defined by @ops. The vport will contain | |
169 | * a private data area of size @priv_size that can be accessed using | |
170 | * vport_priv(). vports that are no longer needed should be released with | |
e23775f2 | 171 | * vport_free(). |
f2459fe7 | 172 | */ |
850b6b3b | 173 | struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops, |
e23775f2 | 174 | const struct vport_parms *parms) |
f2459fe7 JG |
175 | { |
176 | struct vport *vport; | |
177 | size_t alloc_size; | |
178 | ||
179 | alloc_size = sizeof(struct vport); | |
180 | if (priv_size) { | |
181 | alloc_size = ALIGN(alloc_size, VPORT_ALIGN); | |
182 | alloc_size += priv_size; | |
183 | } | |
184 | ||
185 | vport = kzalloc(alloc_size, GFP_KERNEL); | |
186 | if (!vport) | |
187 | return ERR_PTR(-ENOMEM); | |
188 | ||
e779d8d9 BP |
189 | vport->dp = parms->dp; |
190 | vport->port_no = parms->port_no; | |
f2459fe7 | 191 | vport->ops = ops; |
95b1d73a | 192 | INIT_HLIST_NODE(&vport->dp_hash_node); |
f2459fe7 | 193 | |
d5797f6d CJ |
194 | if (ovs_vport_set_upcall_portids(vport, parms->upcall_portids)) { |
195 | kfree(vport); | |
beb1c69a | 196 | return ERR_PTR(-EINVAL); |
d5797f6d | 197 | } |
beb1c69a | 198 | |
f2459fe7 JG |
199 | return vport; |
200 | } | |
5a38795f TG |
201 | EXPORT_SYMBOL_GPL(ovs_vport_alloc); |
202 | ||
f2459fe7 | 203 | /** |
850b6b3b | 204 | * ovs_vport_free - uninitialize and free vport |
f2459fe7 JG |
205 | * |
206 | * @vport: vport to free | |
207 | * | |
e23775f2 | 208 | * Frees a vport allocated with vport_alloc() when it is no longer needed. |
057dd6d2 BP |
209 | * |
210 | * The caller must ensure that an RCU grace period has passed since the last | |
211 | * time @vport was in a datapath. | |
f2459fe7 | 212 | */ |
850b6b3b | 213 | void ovs_vport_free(struct vport *vport) |
f2459fe7 | 214 | { |
e23775f2 PS |
215 | /* vport is freed from RCU callback or error path, Therefore |
216 | * it is safe to use raw dereference. | |
217 | */ | |
46051cf8 | 218 | kfree(rcu_dereference_raw(vport->upcall_portids)); |
5ca1ba48 | 219 | kfree(vport); |
f2459fe7 | 220 | } |
5a38795f | 221 | EXPORT_SYMBOL_GPL(ovs_vport_free); |
f2459fe7 | 222 | |
e23775f2 PS |
223 | static struct vport_ops *ovs_vport_lookup(const struct vport_parms *parms) |
224 | { | |
225 | struct vport_ops *ops; | |
226 | ||
227 | list_for_each_entry(ops, &vport_ops_list, list) | |
228 | if (ops->type == parms->type) | |
229 | return ops; | |
230 | ||
231 | return NULL; | |
232 | } | |
233 | ||
f2459fe7 | 234 | /** |
850b6b3b | 235 | * ovs_vport_add - add vport device (for kernel callers) |
f2459fe7 | 236 | * |
94903c98 | 237 | * @parms: Information about new vport. |
f2459fe7 | 238 | * |
7237e4f4 | 239 | * Creates a new vport with the specified configuration (which is dependent on |
cd2a59e9 | 240 | * device type). ovs_mutex must be held. |
f2459fe7 | 241 | */ |
850b6b3b | 242 | struct vport *ovs_vport_add(const struct vport_parms *parms) |
f2459fe7 | 243 | { |
5a38795f | 244 | struct vport_ops *ops; |
f2459fe7 | 245 | struct vport *vport; |
f2459fe7 | 246 | |
5a38795f TG |
247 | ops = ovs_vport_lookup(parms); |
248 | if (ops) { | |
249 | struct hlist_head *bucket; | |
2a4999f3 | 250 | |
5a38795f TG |
251 | if (!try_module_get(ops->owner)) |
252 | return ERR_PTR(-EAFNOSUPPORT); | |
f2459fe7 | 253 | |
5a38795f TG |
254 | vport = ops->create(parms); |
255 | if (IS_ERR(vport)) { | |
256 | module_put(ops->owner); | |
f2459fe7 JG |
257 | return vport; |
258 | } | |
5a38795f TG |
259 | |
260 | bucket = hash_bucket(ovs_dp_get_net(vport->dp), | |
e23775f2 | 261 | ovs_vport_name(vport)); |
5a38795f TG |
262 | hlist_add_head_rcu(&vport->hash_node, bucket); |
263 | return vport; | |
f2459fe7 JG |
264 | } |
265 | ||
5a38795f TG |
266 | /* Unlock to attempt module load and return -EAGAIN if load |
267 | * was successful as we need to restart the port addition | |
268 | * workflow. | |
269 | */ | |
270 | ovs_unlock(); | |
271 | request_module("vport-type-%d", parms->type); | |
272 | ovs_lock(); | |
f2459fe7 | 273 | |
5a38795f TG |
274 | if (!ovs_vport_lookup(parms)) |
275 | return ERR_PTR(-EAFNOSUPPORT); | |
276 | else | |
277 | return ERR_PTR(-EAGAIN); | |
f2459fe7 JG |
278 | } |
279 | ||
280 | /** | |
850b6b3b | 281 | * ovs_vport_set_options - modify existing vport device (for kernel callers) |
f2459fe7 JG |
282 | * |
283 | * @vport: vport to modify. | |
323301f2 | 284 | * @options: New configuration. |
f2459fe7 JG |
285 | * |
286 | * Modifies an existing device with the specified configuration (which is | |
cd2a59e9 | 287 | * dependent on device type). ovs_mutex must be held. |
f2459fe7 | 288 | */ |
850b6b3b | 289 | int ovs_vport_set_options(struct vport *vport, struct nlattr *options) |
f2459fe7 | 290 | { |
c19e6535 | 291 | if (!vport->ops->set_options) |
f2459fe7 | 292 | return -EOPNOTSUPP; |
c19e6535 | 293 | return vport->ops->set_options(vport, options); |
f2459fe7 JG |
294 | } |
295 | ||
296 | /** | |
850b6b3b | 297 | * ovs_vport_del - delete existing vport device |
f2459fe7 JG |
298 | * |
299 | * @vport: vport to delete. | |
300 | * | |
554c64b0 AC |
301 | * Detaches @vport from its datapath and destroys it. ovs_mutex must be |
302 | * held. | |
f2459fe7 | 303 | */ |
850b6b3b | 304 | void ovs_vport_del(struct vport *vport) |
f2459fe7 | 305 | { |
cd2a59e9 | 306 | ASSERT_OVSL(); |
f2459fe7 | 307 | |
057dd6d2 | 308 | hlist_del_rcu(&vport->hash_node); |
5a38795f | 309 | module_put(vport->ops->owner); |
3544358a | 310 | vport->ops->destroy(vport); |
f2459fe7 JG |
311 | } |
312 | ||
780e6207 | 313 | /** |
850b6b3b | 314 | * ovs_vport_get_stats - retrieve device stats |
780e6207 JG |
315 | * |
316 | * @vport: vport from which to retrieve the stats | |
317 | * @stats: location to store stats | |
318 | * | |
319 | * Retrieves transmit, receive, and error stats for the given device. | |
ed099e92 | 320 | * |
cd2a59e9 | 321 | * Must be called with ovs_mutex or rcu_read_lock. |
780e6207 | 322 | */ |
850b6b3b | 323 | void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats) |
780e6207 | 324 | { |
e23775f2 PS |
325 | const struct rtnl_link_stats64 *dev_stats; |
326 | struct rtnl_link_stats64 temp; | |
327 | ||
328 | dev_stats = dev_get_stats(vport->dev, &temp); | |
329 | stats->rx_errors = dev_stats->rx_errors; | |
330 | stats->tx_errors = dev_stats->tx_errors; | |
331 | stats->tx_dropped = dev_stats->tx_dropped; | |
332 | stats->rx_dropped = dev_stats->rx_dropped; | |
333 | ||
334 | stats->rx_bytes = dev_stats->rx_bytes; | |
335 | stats->rx_packets = dev_stats->rx_packets; | |
336 | stats->tx_bytes = dev_stats->tx_bytes; | |
337 | stats->tx_packets = dev_stats->tx_packets; | |
780e6207 JG |
338 | } |
339 | ||
dd851cbb | 340 | /** |
850b6b3b | 341 | * ovs_vport_get_options - retrieve device options |
dd851cbb | 342 | * |
c19e6535 BP |
343 | * @vport: vport from which to retrieve the options. |
344 | * @skb: sk_buff where options should be appended. | |
dd851cbb | 345 | * |
c19e6535 | 346 | * Retrieves the configuration of the given device, appending an |
df2c07f4 | 347 | * %OVS_VPORT_ATTR_OPTIONS attribute that in turn contains nested |
ed099e92 | 348 | * vport-specific attributes to @skb. |
c19e6535 BP |
349 | * |
350 | * Returns 0 if successful, -EMSGSIZE if @skb has insufficient room, or another | |
f0fef760 BP |
351 | * negative error code if a real error occurred. If an error occurs, @skb is |
352 | * left unmodified. | |
ed099e92 | 353 | * |
cd2a59e9 | 354 | * Must be called with ovs_mutex or rcu_read_lock. |
dd851cbb | 355 | */ |
850b6b3b | 356 | int ovs_vport_get_options(const struct vport *vport, struct sk_buff *skb) |
dd851cbb | 357 | { |
c19e6535 | 358 | struct nlattr *nla; |
778ea0a4 TG |
359 | int err; |
360 | ||
361 | if (!vport->ops->get_options) | |
362 | return 0; | |
c19e6535 | 363 | |
df2c07f4 | 364 | nla = nla_nest_start(skb, OVS_VPORT_ATTR_OPTIONS); |
c19e6535 BP |
365 | if (!nla) |
366 | return -EMSGSIZE; | |
367 | ||
778ea0a4 TG |
368 | err = vport->ops->get_options(vport, skb); |
369 | if (err) { | |
370 | nla_nest_cancel(skb, nla); | |
371 | return err; | |
c19e6535 BP |
372 | } |
373 | ||
374 | nla_nest_end(skb, nla); | |
375 | return 0; | |
dd851cbb JP |
376 | } |
377 | ||
beb1c69a AW |
378 | /** |
379 | * ovs_vport_set_upcall_portids - set upcall portids of @vport. | |
380 | * | |
381 | * @vport: vport to modify. | |
382 | * @ids: new configuration, an array of port ids. | |
383 | * | |
384 | * Sets the vport's upcall_portids to @ids. | |
385 | * | |
386 | * Returns 0 if successful, -EINVAL if @ids is zero length or cannot be parsed | |
387 | * as an array of U32. | |
388 | * | |
389 | * Must be called with ovs_mutex. | |
390 | */ | |
f1f60b85 | 391 | int ovs_vport_set_upcall_portids(struct vport *vport, const struct nlattr *ids) |
beb1c69a AW |
392 | { |
393 | struct vport_portids *old, *vport_portids; | |
394 | ||
395 | if (!nla_len(ids) || nla_len(ids) % sizeof(u32)) | |
396 | return -EINVAL; | |
397 | ||
398 | old = ovsl_dereference(vport->upcall_portids); | |
399 | ||
e23775f2 | 400 | vport_portids = kmalloc(sizeof(*vport_portids) + nla_len(ids), |
beb1c69a | 401 | GFP_KERNEL); |
c78c16a1 PS |
402 | if (!vport_portids) |
403 | return -ENOMEM; | |
404 | ||
beb1c69a AW |
405 | vport_portids->n_ids = nla_len(ids) / sizeof(u32); |
406 | vport_portids->rn_ids = reciprocal_value(vport_portids->n_ids); | |
407 | nla_memcpy(vport_portids->ids, ids, nla_len(ids)); | |
408 | ||
409 | rcu_assign_pointer(vport->upcall_portids, vport_portids); | |
410 | ||
411 | if (old) | |
8063e095 | 412 | kfree_rcu(old, rcu); |
beb1c69a AW |
413 | return 0; |
414 | } | |
415 | ||
416 | /** | |
417 | * ovs_vport_get_upcall_portids - get the upcall_portids of @vport. | |
418 | * | |
419 | * @vport: vport from which to retrieve the portids. | |
420 | * @skb: sk_buff where portids should be appended. | |
421 | * | |
422 | * Retrieves the configuration of the given vport, appending the | |
423 | * %OVS_VPORT_ATTR_UPCALL_PID attribute which is the array of upcall | |
424 | * portids to @skb. | |
425 | * | |
426 | * Returns 0 if successful, -EMSGSIZE if @skb has insufficient room. | |
427 | * If an error occurs, @skb is left unmodified. Must be called with | |
428 | * ovs_mutex or rcu_read_lock. | |
429 | */ | |
430 | int ovs_vport_get_upcall_portids(const struct vport *vport, | |
431 | struct sk_buff *skb) | |
432 | { | |
433 | struct vport_portids *ids; | |
434 | ||
435 | ids = rcu_dereference_ovsl(vport->upcall_portids); | |
436 | ||
437 | if (vport->dp->user_features & OVS_DP_F_VPORT_PIDS) | |
438 | return nla_put(skb, OVS_VPORT_ATTR_UPCALL_PID, | |
e23775f2 | 439 | ids->n_ids * sizeof(u32), (void *)ids->ids); |
beb1c69a AW |
440 | else |
441 | return nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, ids->ids[0]); | |
442 | } | |
443 | ||
444 | /** | |
445 | * ovs_vport_find_upcall_portid - find the upcall portid to send upcall. | |
446 | * | |
447 | * @vport: vport from which the missed packet is received. | |
448 | * @skb: skb that the missed packet was received. | |
449 | * | |
e2f3178f | 450 | * Uses the skb_get_hash() to select the upcall portid to send the |
beb1c69a AW |
451 | * upcall. |
452 | * | |
453 | * Returns the portid of the target socket. Must be called with rcu_read_lock. | |
454 | */ | |
6bb842f6 | 455 | u32 ovs_vport_find_upcall_portid(const struct vport *vport, struct sk_buff *skb) |
beb1c69a AW |
456 | { |
457 | struct vport_portids *ids; | |
e23775f2 | 458 | u32 ids_index; |
beb1c69a AW |
459 | u32 hash; |
460 | ||
6bb842f6 | 461 | ids = rcu_dereference(vport->upcall_portids); |
beb1c69a AW |
462 | |
463 | if (ids->n_ids == 1 && ids->ids[0] == 0) | |
464 | return 0; | |
465 | ||
e2f3178f | 466 | hash = skb_get_hash(skb); |
e23775f2 PS |
467 | ids_index = hash - ids->n_ids * reciprocal_divide(hash, ids->rn_ids); |
468 | return ids->ids[ids_index]; | |
beb1c69a AW |
469 | } |
470 | ||
f2459fe7 | 471 | /** |
850b6b3b | 472 | * ovs_vport_receive - pass up received packet to the datapath for processing |
f2459fe7 JG |
473 | * |
474 | * @vport: vport that received the packet | |
475 | * @skb: skb that was received | |
e23775f2 | 476 | * @tun_key: tunnel (if any) that carried packet |
f2459fe7 | 477 | * |
8819fac7 | 478 | * Must be called with rcu_read_lock. The packet cannot be shared and |
e23775f2 | 479 | * skb->data should point to the Ethernet header. |
f2459fe7 | 480 | */ |
e23775f2 PS |
481 | int ovs_vport_receive(struct vport *vport, struct sk_buff *skb, |
482 | const struct ip_tunnel_info *tun_info) | |
f2459fe7 | 483 | { |
fb66fbd1 PS |
484 | struct sw_flow_key key; |
485 | int error; | |
f2459fe7 | 486 | |
c450371e | 487 | OVS_CB(skb)->input_vport = vport; |
a94ebc39 | 488 | OVS_CB(skb)->mru = 0; |
4c7804f1 | 489 | OVS_CB(skb)->cutlen = 0; |
5516c277 JS |
490 | if (unlikely(dev_net(skb->dev) != ovs_dp_get_net(vport->dp))) { |
491 | u32 mark; | |
492 | ||
493 | mark = skb->mark; | |
494 | skb_scrub_packet(skb, true); | |
495 | skb->mark = mark; | |
496 | tun_info = NULL; | |
497 | } | |
498 | ||
e23775f2 PS |
499 | ovs_skb_init_inner_protocol(skb); |
500 | skb_clear_ovs_gso_cb(skb); | |
501 | /* Extract flow from 'skb' into 'key'. */ | |
fb66fbd1 PS |
502 | error = ovs_flow_key_extract(tun_info, skb, &key); |
503 | if (unlikely(error)) { | |
504 | kfree_skb(skb); | |
e23775f2 | 505 | return error; |
fb66fbd1 | 506 | } |
e74d4817 | 507 | ovs_dp_process_packet(skb, &key); |
e23775f2 | 508 | return 0; |
f2459fe7 | 509 | } |
5a38795f | 510 | EXPORT_SYMBOL_GPL(ovs_vport_receive); |
f2459fe7 | 511 | |
c405d282 PS |
512 | static void free_vport_rcu(struct rcu_head *rcu) |
513 | { | |
514 | struct vport *vport = container_of(rcu, struct vport, rcu); | |
515 | ||
516 | ovs_vport_free(vport); | |
517 | } | |
518 | ||
519 | void ovs_vport_deferred_free(struct vport *vport) | |
520 | { | |
521 | if (!vport) | |
522 | return; | |
523 | ||
524 | call_rcu(&vport->rcu, free_vport_rcu); | |
525 | } | |
5a38795f | 526 | EXPORT_SYMBOL_GPL(ovs_vport_deferred_free); |
8b7ea2d4 | 527 | |
e23775f2 PS |
528 | static unsigned int packet_length(const struct sk_buff *skb) |
529 | { | |
530 | unsigned int length = skb->len - ETH_HLEN; | |
531 | ||
532 | if (skb->protocol == htons(ETH_P_8021Q)) | |
533 | length -= VLAN_HLEN; | |
534 | ||
535 | return length; | |
536 | } | |
537 | ||
538 | void ovs_vport_send(struct vport *vport, struct sk_buff *skb) | |
539 | { | |
540 | int mtu = vport->dev->mtu; | |
541 | ||
542 | if (unlikely(packet_length(skb) > mtu && !skb_is_gso(skb))) { | |
543 | net_warn_ratelimited("%s: dropped over-mtu packet: %d > %d\n", | |
544 | vport->dev->name, | |
545 | packet_length(skb), mtu); | |
546 | vport->dev->stats.tx_errors++; | |
547 | goto drop; | |
548 | } | |
549 | ||
550 | skb->dev = vport->dev; | |
551 | vport->ops->send(skb); | |
552 | return; | |
553 | ||
554 | drop: | |
555 | kfree_skb(skb); | |
8b7ea2d4 | 556 | } |