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Commit | Line | Data |
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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); |
9f4aacc3 | 45 | static bool compat_gre_loaded = false; |
2671254d | 46 | static bool compat_ip6_tunnel_loaded = false; |
f2459fe7 | 47 | |
cd2a59e9 | 48 | /* Protected by RCU read lock for reading, ovs_mutex for writing. */ |
f2459fe7 JG |
49 | static struct hlist_head *dev_table; |
50 | #define VPORT_HASH_BUCKETS 1024 | |
51 | ||
f2459fe7 | 52 | /** |
850b6b3b | 53 | * ovs_vport_init - initialize vport subsystem |
f2459fe7 | 54 | * |
806b46ef | 55 | * Called at module load time to initialize the vport subsystem. |
f2459fe7 | 56 | */ |
850b6b3b | 57 | int ovs_vport_init(void) |
f2459fe7 | 58 | { |
e23775f2 PS |
59 | int err; |
60 | ||
bac1d53d | 61 | dev_table = kcalloc(VPORT_HASH_BUCKETS, sizeof(struct hlist_head), |
f2459fe7 | 62 | GFP_KERNEL); |
806b46ef PS |
63 | if (!dev_table) |
64 | return -ENOMEM; | |
f2459fe7 | 65 | |
e23775f2 PS |
66 | err = lisp_init_module(); |
67 | if (err) | |
68 | goto err_lisp; | |
9f4aacc3 | 69 | err = gre_init(); |
8de03c61 | 70 | if (err && err != -EEXIST) { |
9f4aacc3 | 71 | goto err_gre; |
8de03c61 WT |
72 | } else { |
73 | if (err == -EEXIST) { | |
74 | pr_warn("Cannot take GRE protocol rx entry"\ | |
75 | "- The GRE/ERSPAN rx feature not supported\n"); | |
76 | /* continue GRE tx */ | |
77 | } | |
78 | ||
9f4aacc3 GR |
79 | err = ipgre_init(); |
80 | if (err && err != -EEXIST) | |
81 | goto err_ipgre; | |
82 | compat_gre_loaded = true; | |
83 | } | |
c387d817 | 84 | err = ip6gre_init(); |
2671254d | 85 | if (err && err != -EEXIST) { |
c387d817 | 86 | goto err_ip6gre; |
2671254d GR |
87 | } else { |
88 | if (err == -EEXIST) { | |
89 | pr_warn("IPv6 GRE/ERSPAN Rx mode is not supported\n"); | |
90 | goto skip_ip6_tunnel_init; | |
91 | } | |
92 | } | |
93 | ||
c387d817 GR |
94 | err = ip6_tunnel_init(); |
95 | if (err) | |
96 | goto err_ip6_tunnel; | |
2671254d GR |
97 | else |
98 | compat_ip6_tunnel_loaded = true; | |
99 | ||
100 | skip_ip6_tunnel_init: | |
e23775f2 PS |
101 | err = geneve_init_module(); |
102 | if (err) | |
103 | goto err_geneve; | |
e23775f2 PS |
104 | err = vxlan_init_module(); |
105 | if (err) | |
106 | goto err_vxlan; | |
107 | err = ovs_stt_init_module(); | |
108 | if (err) | |
109 | goto err_stt; | |
e23775f2 | 110 | |
828677b2 | 111 | return 0; |
828677b2 | 112 | ovs_stt_cleanup_module(); |
e23775f2 PS |
113 | err_stt: |
114 | vxlan_cleanup_module(); | |
115 | err_vxlan: | |
116 | geneve_cleanup_module(); | |
117 | err_geneve: | |
c387d817 GR |
118 | ip6_tunnel_cleanup(); |
119 | err_ip6_tunnel: | |
120 | ip6gre_fini(); | |
121 | err_ip6gre: | |
e23775f2 | 122 | ipgre_fini(); |
828677b2 | 123 | err_ipgre: |
9f4aacc3 GR |
124 | gre_exit(); |
125 | err_gre: | |
e23775f2 PS |
126 | lisp_cleanup_module(); |
127 | err_lisp: | |
128 | kfree(dev_table); | |
129 | return err; | |
f2459fe7 JG |
130 | } |
131 | ||
f2459fe7 | 132 | /** |
850b6b3b | 133 | * ovs_vport_exit - shutdown vport subsystem |
f2459fe7 | 134 | * |
806b46ef | 135 | * Called at module exit time to shutdown the vport subsystem. |
f2459fe7 | 136 | */ |
850b6b3b | 137 | void ovs_vport_exit(void) |
f2459fe7 | 138 | { |
9f4aacc3 GR |
139 | if (compat_gre_loaded) { |
140 | gre_exit(); | |
141 | ipgre_fini(); | |
142 | } | |
e23775f2 PS |
143 | ovs_stt_cleanup_module(); |
144 | vxlan_cleanup_module(); | |
145 | geneve_cleanup_module(); | |
2671254d GR |
146 | if (compat_ip6_tunnel_loaded) |
147 | ip6_tunnel_cleanup(); | |
c387d817 | 148 | ip6gre_fini(); |
e23775f2 | 149 | lisp_cleanup_module(); |
f2459fe7 JG |
150 | kfree(dev_table); |
151 | } | |
152 | ||
f1f60b85 | 153 | static struct hlist_head *hash_bucket(const struct net *net, const char *name) |
f2459fe7 | 154 | { |
2a4999f3 | 155 | unsigned int hash = jhash(name, strlen(name), (unsigned long) net); |
f2459fe7 JG |
156 | return &dev_table[hash & (VPORT_HASH_BUCKETS - 1)]; |
157 | } | |
158 | ||
f07995ef | 159 | int __ovs_vport_ops_register(struct vport_ops *ops) |
5a38795f TG |
160 | { |
161 | int err = -EEXIST; | |
162 | struct vport_ops *o; | |
163 | ||
164 | ovs_lock(); | |
165 | list_for_each_entry(o, &vport_ops_list, list) | |
e23775f2 PS |
166 | if (ops->type == o->type) |
167 | goto errout; | |
5a38795f TG |
168 | |
169 | list_add_tail(&ops->list, &vport_ops_list); | |
170 | err = 0; | |
171 | errout: | |
172 | ovs_unlock(); | |
173 | return err; | |
174 | } | |
f07995ef | 175 | EXPORT_SYMBOL_GPL(__ovs_vport_ops_register); |
5a38795f TG |
176 | |
177 | void ovs_vport_ops_unregister(struct vport_ops *ops) | |
178 | { | |
179 | ovs_lock(); | |
180 | list_del(&ops->list); | |
181 | ovs_unlock(); | |
182 | } | |
183 | EXPORT_SYMBOL_GPL(ovs_vport_ops_unregister); | |
184 | ||
f2459fe7 | 185 | /** |
850b6b3b | 186 | * ovs_vport_locate - find a port that has already been created |
f2459fe7 JG |
187 | * |
188 | * @name: name of port to find | |
189 | * | |
cd2a59e9 | 190 | * Must be called with ovs or RCU read lock. |
f2459fe7 | 191 | */ |
f1f60b85 | 192 | struct vport *ovs_vport_locate(const struct net *net, const char *name) |
f2459fe7 | 193 | { |
2a4999f3 | 194 | struct hlist_head *bucket = hash_bucket(net, name); |
f2459fe7 | 195 | struct vport *vport; |
f2459fe7 | 196 | |
f8dfbcb7 | 197 | hlist_for_each_entry_rcu(vport, bucket, hash_node) |
e23775f2 | 198 | if (!strcmp(name, ovs_vport_name(vport)) && |
2a4999f3 | 199 | net_eq(ovs_dp_get_net(vport->dp), net)) |
057dd6d2 | 200 | return vport; |
f2459fe7 | 201 | |
057dd6d2 | 202 | return NULL; |
f2459fe7 JG |
203 | } |
204 | ||
205 | /** | |
850b6b3b | 206 | * ovs_vport_alloc - allocate and initialize new vport |
f2459fe7 JG |
207 | * |
208 | * @priv_size: Size of private data area to allocate. | |
209 | * @ops: vport device ops | |
210 | * | |
211 | * Allocate and initialize a new vport defined by @ops. The vport will contain | |
212 | * a private data area of size @priv_size that can be accessed using | |
213 | * vport_priv(). vports that are no longer needed should be released with | |
e23775f2 | 214 | * vport_free(). |
f2459fe7 | 215 | */ |
850b6b3b | 216 | struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops, |
e23775f2 | 217 | const struct vport_parms *parms) |
f2459fe7 JG |
218 | { |
219 | struct vport *vport; | |
220 | size_t alloc_size; | |
221 | ||
222 | alloc_size = sizeof(struct vport); | |
223 | if (priv_size) { | |
224 | alloc_size = ALIGN(alloc_size, VPORT_ALIGN); | |
225 | alloc_size += priv_size; | |
226 | } | |
227 | ||
228 | vport = kzalloc(alloc_size, GFP_KERNEL); | |
229 | if (!vport) | |
230 | return ERR_PTR(-ENOMEM); | |
231 | ||
e779d8d9 BP |
232 | vport->dp = parms->dp; |
233 | vport->port_no = parms->port_no; | |
f2459fe7 | 234 | vport->ops = ops; |
95b1d73a | 235 | INIT_HLIST_NODE(&vport->dp_hash_node); |
f2459fe7 | 236 | |
d5797f6d CJ |
237 | if (ovs_vport_set_upcall_portids(vport, parms->upcall_portids)) { |
238 | kfree(vport); | |
beb1c69a | 239 | return ERR_PTR(-EINVAL); |
d5797f6d | 240 | } |
beb1c69a | 241 | |
f2459fe7 JG |
242 | return vport; |
243 | } | |
5a38795f TG |
244 | EXPORT_SYMBOL_GPL(ovs_vport_alloc); |
245 | ||
f2459fe7 | 246 | /** |
850b6b3b | 247 | * ovs_vport_free - uninitialize and free vport |
f2459fe7 JG |
248 | * |
249 | * @vport: vport to free | |
250 | * | |
e23775f2 | 251 | * Frees a vport allocated with vport_alloc() when it is no longer needed. |
057dd6d2 BP |
252 | * |
253 | * The caller must ensure that an RCU grace period has passed since the last | |
254 | * time @vport was in a datapath. | |
f2459fe7 | 255 | */ |
850b6b3b | 256 | void ovs_vport_free(struct vport *vport) |
f2459fe7 | 257 | { |
e23775f2 PS |
258 | /* vport is freed from RCU callback or error path, Therefore |
259 | * it is safe to use raw dereference. | |
260 | */ | |
46051cf8 | 261 | kfree(rcu_dereference_raw(vport->upcall_portids)); |
5ca1ba48 | 262 | kfree(vport); |
f2459fe7 | 263 | } |
5a38795f | 264 | EXPORT_SYMBOL_GPL(ovs_vport_free); |
f2459fe7 | 265 | |
e23775f2 PS |
266 | static struct vport_ops *ovs_vport_lookup(const struct vport_parms *parms) |
267 | { | |
268 | struct vport_ops *ops; | |
269 | ||
270 | list_for_each_entry(ops, &vport_ops_list, list) | |
271 | if (ops->type == parms->type) | |
272 | return ops; | |
273 | ||
274 | return NULL; | |
275 | } | |
276 | ||
f2459fe7 | 277 | /** |
850b6b3b | 278 | * ovs_vport_add - add vport device (for kernel callers) |
f2459fe7 | 279 | * |
94903c98 | 280 | * @parms: Information about new vport. |
f2459fe7 | 281 | * |
7237e4f4 | 282 | * Creates a new vport with the specified configuration (which is dependent on |
cd2a59e9 | 283 | * device type). ovs_mutex must be held. |
f2459fe7 | 284 | */ |
850b6b3b | 285 | struct vport *ovs_vport_add(const struct vport_parms *parms) |
f2459fe7 | 286 | { |
5a38795f | 287 | struct vport_ops *ops; |
f2459fe7 | 288 | struct vport *vport; |
f2459fe7 | 289 | |
5a38795f TG |
290 | ops = ovs_vport_lookup(parms); |
291 | if (ops) { | |
292 | struct hlist_head *bucket; | |
2a4999f3 | 293 | |
5a38795f TG |
294 | if (!try_module_get(ops->owner)) |
295 | return ERR_PTR(-EAFNOSUPPORT); | |
f2459fe7 | 296 | |
5a38795f TG |
297 | vport = ops->create(parms); |
298 | if (IS_ERR(vport)) { | |
299 | module_put(ops->owner); | |
f2459fe7 JG |
300 | return vport; |
301 | } | |
5a38795f TG |
302 | |
303 | bucket = hash_bucket(ovs_dp_get_net(vport->dp), | |
e23775f2 | 304 | ovs_vport_name(vport)); |
5a38795f TG |
305 | hlist_add_head_rcu(&vport->hash_node, bucket); |
306 | return vport; | |
f2459fe7 JG |
307 | } |
308 | ||
f9558fb6 GR |
309 | if (parms->type == OVS_VPORT_TYPE_GRE && !compat_gre_loaded) { |
310 | pr_warn("GRE protocol already loaded!\n"); | |
311 | return ERR_PTR(-EAFNOSUPPORT); | |
312 | } | |
5a38795f TG |
313 | /* Unlock to attempt module load and return -EAGAIN if load |
314 | * was successful as we need to restart the port addition | |
315 | * workflow. | |
316 | */ | |
317 | ovs_unlock(); | |
318 | request_module("vport-type-%d", parms->type); | |
319 | ovs_lock(); | |
f2459fe7 | 320 | |
5a38795f TG |
321 | if (!ovs_vport_lookup(parms)) |
322 | return ERR_PTR(-EAFNOSUPPORT); | |
323 | else | |
324 | return ERR_PTR(-EAGAIN); | |
f2459fe7 JG |
325 | } |
326 | ||
327 | /** | |
850b6b3b | 328 | * ovs_vport_set_options - modify existing vport device (for kernel callers) |
f2459fe7 JG |
329 | * |
330 | * @vport: vport to modify. | |
323301f2 | 331 | * @options: New configuration. |
f2459fe7 JG |
332 | * |
333 | * Modifies an existing device with the specified configuration (which is | |
cd2a59e9 | 334 | * dependent on device type). ovs_mutex must be held. |
f2459fe7 | 335 | */ |
850b6b3b | 336 | int ovs_vport_set_options(struct vport *vport, struct nlattr *options) |
f2459fe7 | 337 | { |
c19e6535 | 338 | if (!vport->ops->set_options) |
f2459fe7 | 339 | return -EOPNOTSUPP; |
c19e6535 | 340 | return vport->ops->set_options(vport, options); |
f2459fe7 JG |
341 | } |
342 | ||
343 | /** | |
850b6b3b | 344 | * ovs_vport_del - delete existing vport device |
f2459fe7 JG |
345 | * |
346 | * @vport: vport to delete. | |
347 | * | |
554c64b0 AC |
348 | * Detaches @vport from its datapath and destroys it. ovs_mutex must be |
349 | * held. | |
f2459fe7 | 350 | */ |
850b6b3b | 351 | void ovs_vport_del(struct vport *vport) |
f2459fe7 | 352 | { |
cd2a59e9 | 353 | ASSERT_OVSL(); |
f2459fe7 | 354 | |
057dd6d2 | 355 | hlist_del_rcu(&vport->hash_node); |
5a38795f | 356 | module_put(vport->ops->owner); |
3544358a | 357 | vport->ops->destroy(vport); |
f2459fe7 JG |
358 | } |
359 | ||
780e6207 | 360 | /** |
850b6b3b | 361 | * ovs_vport_get_stats - retrieve device stats |
780e6207 JG |
362 | * |
363 | * @vport: vport from which to retrieve the stats | |
364 | * @stats: location to store stats | |
365 | * | |
366 | * Retrieves transmit, receive, and error stats for the given device. | |
ed099e92 | 367 | * |
cd2a59e9 | 368 | * Must be called with ovs_mutex or rcu_read_lock. |
780e6207 | 369 | */ |
850b6b3b | 370 | void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats) |
780e6207 | 371 | { |
e23775f2 PS |
372 | const struct rtnl_link_stats64 *dev_stats; |
373 | struct rtnl_link_stats64 temp; | |
374 | ||
375 | dev_stats = dev_get_stats(vport->dev, &temp); | |
376 | stats->rx_errors = dev_stats->rx_errors; | |
377 | stats->tx_errors = dev_stats->tx_errors; | |
378 | stats->tx_dropped = dev_stats->tx_dropped; | |
379 | stats->rx_dropped = dev_stats->rx_dropped; | |
380 | ||
381 | stats->rx_bytes = dev_stats->rx_bytes; | |
382 | stats->rx_packets = dev_stats->rx_packets; | |
383 | stats->tx_bytes = dev_stats->tx_bytes; | |
384 | stats->tx_packets = dev_stats->tx_packets; | |
780e6207 JG |
385 | } |
386 | ||
dd851cbb | 387 | /** |
850b6b3b | 388 | * ovs_vport_get_options - retrieve device options |
dd851cbb | 389 | * |
c19e6535 BP |
390 | * @vport: vport from which to retrieve the options. |
391 | * @skb: sk_buff where options should be appended. | |
dd851cbb | 392 | * |
c19e6535 | 393 | * Retrieves the configuration of the given device, appending an |
df2c07f4 | 394 | * %OVS_VPORT_ATTR_OPTIONS attribute that in turn contains nested |
ed099e92 | 395 | * vport-specific attributes to @skb. |
c19e6535 BP |
396 | * |
397 | * Returns 0 if successful, -EMSGSIZE if @skb has insufficient room, or another | |
f0fef760 BP |
398 | * negative error code if a real error occurred. If an error occurs, @skb is |
399 | * left unmodified. | |
ed099e92 | 400 | * |
cd2a59e9 | 401 | * Must be called with ovs_mutex or rcu_read_lock. |
dd851cbb | 402 | */ |
850b6b3b | 403 | int ovs_vport_get_options(const struct vport *vport, struct sk_buff *skb) |
dd851cbb | 404 | { |
c19e6535 | 405 | struct nlattr *nla; |
778ea0a4 TG |
406 | int err; |
407 | ||
408 | if (!vport->ops->get_options) | |
409 | return 0; | |
c19e6535 | 410 | |
df2c07f4 | 411 | nla = nla_nest_start(skb, OVS_VPORT_ATTR_OPTIONS); |
c19e6535 BP |
412 | if (!nla) |
413 | return -EMSGSIZE; | |
414 | ||
778ea0a4 TG |
415 | err = vport->ops->get_options(vport, skb); |
416 | if (err) { | |
417 | nla_nest_cancel(skb, nla); | |
418 | return err; | |
c19e6535 BP |
419 | } |
420 | ||
421 | nla_nest_end(skb, nla); | |
422 | return 0; | |
dd851cbb JP |
423 | } |
424 | ||
beb1c69a AW |
425 | /** |
426 | * ovs_vport_set_upcall_portids - set upcall portids of @vport. | |
427 | * | |
428 | * @vport: vport to modify. | |
429 | * @ids: new configuration, an array of port ids. | |
430 | * | |
431 | * Sets the vport's upcall_portids to @ids. | |
432 | * | |
433 | * Returns 0 if successful, -EINVAL if @ids is zero length or cannot be parsed | |
434 | * as an array of U32. | |
435 | * | |
436 | * Must be called with ovs_mutex. | |
437 | */ | |
f1f60b85 | 438 | int ovs_vport_set_upcall_portids(struct vport *vport, const struct nlattr *ids) |
beb1c69a AW |
439 | { |
440 | struct vport_portids *old, *vport_portids; | |
441 | ||
442 | if (!nla_len(ids) || nla_len(ids) % sizeof(u32)) | |
443 | return -EINVAL; | |
444 | ||
445 | old = ovsl_dereference(vport->upcall_portids); | |
446 | ||
e23775f2 | 447 | vport_portids = kmalloc(sizeof(*vport_portids) + nla_len(ids), |
beb1c69a | 448 | GFP_KERNEL); |
c78c16a1 PS |
449 | if (!vport_portids) |
450 | return -ENOMEM; | |
451 | ||
beb1c69a AW |
452 | vport_portids->n_ids = nla_len(ids) / sizeof(u32); |
453 | vport_portids->rn_ids = reciprocal_value(vport_portids->n_ids); | |
454 | nla_memcpy(vport_portids->ids, ids, nla_len(ids)); | |
455 | ||
456 | rcu_assign_pointer(vport->upcall_portids, vport_portids); | |
457 | ||
458 | if (old) | |
8063e095 | 459 | kfree_rcu(old, rcu); |
beb1c69a AW |
460 | return 0; |
461 | } | |
462 | ||
463 | /** | |
464 | * ovs_vport_get_upcall_portids - get the upcall_portids of @vport. | |
465 | * | |
466 | * @vport: vport from which to retrieve the portids. | |
467 | * @skb: sk_buff where portids should be appended. | |
468 | * | |
469 | * Retrieves the configuration of the given vport, appending the | |
470 | * %OVS_VPORT_ATTR_UPCALL_PID attribute which is the array of upcall | |
471 | * portids to @skb. | |
472 | * | |
473 | * Returns 0 if successful, -EMSGSIZE if @skb has insufficient room. | |
474 | * If an error occurs, @skb is left unmodified. Must be called with | |
475 | * ovs_mutex or rcu_read_lock. | |
476 | */ | |
477 | int ovs_vport_get_upcall_portids(const struct vport *vport, | |
478 | struct sk_buff *skb) | |
479 | { | |
480 | struct vport_portids *ids; | |
481 | ||
482 | ids = rcu_dereference_ovsl(vport->upcall_portids); | |
483 | ||
484 | if (vport->dp->user_features & OVS_DP_F_VPORT_PIDS) | |
485 | return nla_put(skb, OVS_VPORT_ATTR_UPCALL_PID, | |
e23775f2 | 486 | ids->n_ids * sizeof(u32), (void *)ids->ids); |
beb1c69a AW |
487 | else |
488 | return nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, ids->ids[0]); | |
489 | } | |
490 | ||
491 | /** | |
492 | * ovs_vport_find_upcall_portid - find the upcall portid to send upcall. | |
493 | * | |
494 | * @vport: vport from which the missed packet is received. | |
495 | * @skb: skb that the missed packet was received. | |
496 | * | |
e2f3178f | 497 | * Uses the skb_get_hash() to select the upcall portid to send the |
beb1c69a AW |
498 | * upcall. |
499 | * | |
500 | * Returns the portid of the target socket. Must be called with rcu_read_lock. | |
501 | */ | |
6bb842f6 | 502 | u32 ovs_vport_find_upcall_portid(const struct vport *vport, struct sk_buff *skb) |
beb1c69a AW |
503 | { |
504 | struct vport_portids *ids; | |
e23775f2 | 505 | u32 ids_index; |
beb1c69a AW |
506 | u32 hash; |
507 | ||
6bb842f6 | 508 | ids = rcu_dereference(vport->upcall_portids); |
beb1c69a AW |
509 | |
510 | if (ids->n_ids == 1 && ids->ids[0] == 0) | |
511 | return 0; | |
512 | ||
e2f3178f | 513 | hash = skb_get_hash(skb); |
e23775f2 PS |
514 | ids_index = hash - ids->n_ids * reciprocal_divide(hash, ids->rn_ids); |
515 | return ids->ids[ids_index]; | |
beb1c69a AW |
516 | } |
517 | ||
f2459fe7 | 518 | /** |
850b6b3b | 519 | * ovs_vport_receive - pass up received packet to the datapath for processing |
f2459fe7 JG |
520 | * |
521 | * @vport: vport that received the packet | |
522 | * @skb: skb that was received | |
e23775f2 | 523 | * @tun_key: tunnel (if any) that carried packet |
f2459fe7 | 524 | * |
8819fac7 | 525 | * Must be called with rcu_read_lock. The packet cannot be shared and |
e23775f2 | 526 | * skb->data should point to the Ethernet header. |
f2459fe7 | 527 | */ |
e23775f2 PS |
528 | int ovs_vport_receive(struct vport *vport, struct sk_buff *skb, |
529 | const struct ip_tunnel_info *tun_info) | |
f2459fe7 | 530 | { |
fb66fbd1 PS |
531 | struct sw_flow_key key; |
532 | int error; | |
f2459fe7 | 533 | |
c450371e | 534 | OVS_CB(skb)->input_vport = vport; |
a94ebc39 | 535 | OVS_CB(skb)->mru = 0; |
4c7804f1 | 536 | OVS_CB(skb)->cutlen = 0; |
5516c277 JS |
537 | if (unlikely(dev_net(skb->dev) != ovs_dp_get_net(vport->dp))) { |
538 | u32 mark; | |
539 | ||
540 | mark = skb->mark; | |
541 | skb_scrub_packet(skb, true); | |
542 | skb->mark = mark; | |
543 | tun_info = NULL; | |
544 | } | |
545 | ||
e23775f2 PS |
546 | ovs_skb_init_inner_protocol(skb); |
547 | skb_clear_ovs_gso_cb(skb); | |
548 | /* Extract flow from 'skb' into 'key'. */ | |
fb66fbd1 PS |
549 | error = ovs_flow_key_extract(tun_info, skb, &key); |
550 | if (unlikely(error)) { | |
551 | kfree_skb(skb); | |
e23775f2 | 552 | return error; |
fb66fbd1 | 553 | } |
e74d4817 | 554 | ovs_dp_process_packet(skb, &key); |
e23775f2 | 555 | return 0; |
f2459fe7 JG |
556 | } |
557 | ||
c6bbe820 WT |
558 | static int packet_length(const struct sk_buff *skb, |
559 | struct net_device *dev) | |
e23775f2 | 560 | { |
c6bbe820 | 561 | int length = skb->len - dev->hard_header_len; |
e23775f2 | 562 | |
d7efce7b YY |
563 | if (!skb_vlan_tag_present(skb) && |
564 | eth_type_vlan(skb->protocol)) | |
e23775f2 PS |
565 | length -= VLAN_HLEN; |
566 | ||
d7efce7b YY |
567 | /* Don't subtract for multiple VLAN tags. Most (all?) drivers allow |
568 | * (ETH_LEN + VLAN_HLEN) in addition to the mtu value, but almost none | |
569 | * account for 802.1ad. e.g. is_skb_forwardable(). | |
570 | */ | |
571 | ||
c6bbe820 | 572 | return length > 0 ? length: 0; |
e23775f2 PS |
573 | } |
574 | ||
f80d0524 | 575 | void ovs_vport_send(struct vport *vport, struct sk_buff *skb, u8 mac_proto) |
e23775f2 PS |
576 | { |
577 | int mtu = vport->dev->mtu; | |
578 | ||
a27c454e YY |
579 | switch (vport->dev->type) { |
580 | case ARPHRD_NONE: | |
581 | if (mac_proto == MAC_PROTO_ETHERNET) { | |
582 | skb_reset_network_header(skb); | |
583 | skb_reset_mac_len(skb); | |
584 | skb->protocol = htons(ETH_P_TEB); | |
585 | } else if (mac_proto != MAC_PROTO_NONE) { | |
586 | WARN_ON_ONCE(1); | |
587 | goto drop; | |
588 | } | |
589 | break; | |
590 | case ARPHRD_ETHER: | |
591 | if (mac_proto != MAC_PROTO_ETHERNET) | |
592 | goto drop; | |
593 | break; | |
594 | default: | |
595 | goto drop; | |
596 | } | |
597 | ||
f0b0bdd2 YY |
598 | if (unlikely(packet_length(skb, vport->dev) > mtu && |
599 | !skb_is_gso(skb))) { | |
e23775f2 PS |
600 | net_warn_ratelimited("%s: dropped over-mtu packet: %d > %d\n", |
601 | vport->dev->name, | |
f0b0bdd2 | 602 | packet_length(skb, vport->dev), mtu); |
e23775f2 PS |
603 | vport->dev->stats.tx_errors++; |
604 | goto drop; | |
605 | } | |
606 | ||
607 | skb->dev = vport->dev; | |
608 | vport->ops->send(skb); | |
609 | return; | |
610 | ||
611 | drop: | |
612 | kfree_skb(skb); | |
8b7ea2d4 | 613 | } |