Commit | Line | Data |
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ccb1352e | 1 | /* |
caf2ee14 | 2 | * Copyright (c) 2007-2011 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 "flow.h" | |
20 | #include "datapath.h" | |
21 | #include <linux/uaccess.h> | |
22 | #include <linux/netdevice.h> | |
23 | #include <linux/etherdevice.h> | |
24 | #include <linux/if_ether.h> | |
25 | #include <linux/if_vlan.h> | |
26 | #include <net/llc_pdu.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/jhash.h> | |
29 | #include <linux/jiffies.h> | |
30 | #include <linux/llc.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/in.h> | |
33 | #include <linux/rcupdate.h> | |
34 | #include <linux/if_arp.h> | |
ccb1352e JG |
35 | #include <linux/ip.h> |
36 | #include <linux/ipv6.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/udp.h> | |
39 | #include <linux/icmp.h> | |
40 | #include <linux/icmpv6.h> | |
41 | #include <linux/rculist.h> | |
42 | #include <net/ip.h> | |
7d5437c7 | 43 | #include <net/ip_tunnels.h> |
ccb1352e JG |
44 | #include <net/ipv6.h> |
45 | #include <net/ndisc.h> | |
46 | ||
47 | static struct kmem_cache *flow_cache; | |
48 | ||
49 | static int check_header(struct sk_buff *skb, int len) | |
50 | { | |
51 | if (unlikely(skb->len < len)) | |
52 | return -EINVAL; | |
53 | if (unlikely(!pskb_may_pull(skb, len))) | |
54 | return -ENOMEM; | |
55 | return 0; | |
56 | } | |
57 | ||
58 | static bool arphdr_ok(struct sk_buff *skb) | |
59 | { | |
60 | return pskb_may_pull(skb, skb_network_offset(skb) + | |
61 | sizeof(struct arp_eth_header)); | |
62 | } | |
63 | ||
64 | static int check_iphdr(struct sk_buff *skb) | |
65 | { | |
66 | unsigned int nh_ofs = skb_network_offset(skb); | |
67 | unsigned int ip_len; | |
68 | int err; | |
69 | ||
70 | err = check_header(skb, nh_ofs + sizeof(struct iphdr)); | |
71 | if (unlikely(err)) | |
72 | return err; | |
73 | ||
74 | ip_len = ip_hdrlen(skb); | |
75 | if (unlikely(ip_len < sizeof(struct iphdr) || | |
76 | skb->len < nh_ofs + ip_len)) | |
77 | return -EINVAL; | |
78 | ||
79 | skb_set_transport_header(skb, nh_ofs + ip_len); | |
80 | return 0; | |
81 | } | |
82 | ||
83 | static bool tcphdr_ok(struct sk_buff *skb) | |
84 | { | |
85 | int th_ofs = skb_transport_offset(skb); | |
86 | int tcp_len; | |
87 | ||
88 | if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr)))) | |
89 | return false; | |
90 | ||
91 | tcp_len = tcp_hdrlen(skb); | |
92 | if (unlikely(tcp_len < sizeof(struct tcphdr) || | |
93 | skb->len < th_ofs + tcp_len)) | |
94 | return false; | |
95 | ||
96 | return true; | |
97 | } | |
98 | ||
99 | static bool udphdr_ok(struct sk_buff *skb) | |
100 | { | |
101 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
102 | sizeof(struct udphdr)); | |
103 | } | |
104 | ||
105 | static bool icmphdr_ok(struct sk_buff *skb) | |
106 | { | |
107 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
108 | sizeof(struct icmphdr)); | |
109 | } | |
110 | ||
111 | u64 ovs_flow_used_time(unsigned long flow_jiffies) | |
112 | { | |
113 | struct timespec cur_ts; | |
114 | u64 cur_ms, idle_ms; | |
115 | ||
116 | ktime_get_ts(&cur_ts); | |
117 | idle_ms = jiffies_to_msecs(jiffies - flow_jiffies); | |
118 | cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC + | |
119 | cur_ts.tv_nsec / NSEC_PER_MSEC; | |
120 | ||
121 | return cur_ms - idle_ms; | |
122 | } | |
123 | ||
124 | #define SW_FLOW_KEY_OFFSET(field) \ | |
125 | (offsetof(struct sw_flow_key, field) + \ | |
126 | FIELD_SIZEOF(struct sw_flow_key, field)) | |
127 | ||
128 | static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key, | |
129 | int *key_lenp) | |
130 | { | |
131 | unsigned int nh_ofs = skb_network_offset(skb); | |
132 | unsigned int nh_len; | |
133 | int payload_ofs; | |
134 | struct ipv6hdr *nh; | |
135 | uint8_t nexthdr; | |
136 | __be16 frag_off; | |
137 | int err; | |
138 | ||
139 | *key_lenp = SW_FLOW_KEY_OFFSET(ipv6.label); | |
140 | ||
141 | err = check_header(skb, nh_ofs + sizeof(*nh)); | |
142 | if (unlikely(err)) | |
143 | return err; | |
144 | ||
145 | nh = ipv6_hdr(skb); | |
146 | nexthdr = nh->nexthdr; | |
147 | payload_ofs = (u8 *)(nh + 1) - skb->data; | |
148 | ||
149 | key->ip.proto = NEXTHDR_NONE; | |
150 | key->ip.tos = ipv6_get_dsfield(nh); | |
151 | key->ip.ttl = nh->hop_limit; | |
152 | key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL); | |
153 | key->ipv6.addr.src = nh->saddr; | |
154 | key->ipv6.addr.dst = nh->daddr; | |
155 | ||
156 | payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off); | |
157 | if (unlikely(payload_ofs < 0)) | |
158 | return -EINVAL; | |
159 | ||
160 | if (frag_off) { | |
161 | if (frag_off & htons(~0x7)) | |
162 | key->ip.frag = OVS_FRAG_TYPE_LATER; | |
163 | else | |
164 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
165 | } | |
166 | ||
167 | nh_len = payload_ofs - nh_ofs; | |
168 | skb_set_transport_header(skb, nh_ofs + nh_len); | |
169 | key->ip.proto = nexthdr; | |
170 | return nh_len; | |
171 | } | |
172 | ||
173 | static bool icmp6hdr_ok(struct sk_buff *skb) | |
174 | { | |
175 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
176 | sizeof(struct icmp6hdr)); | |
177 | } | |
178 | ||
179 | #define TCP_FLAGS_OFFSET 13 | |
180 | #define TCP_FLAG_MASK 0x3f | |
181 | ||
182 | void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb) | |
183 | { | |
184 | u8 tcp_flags = 0; | |
185 | ||
c55177e3 JG |
186 | if ((flow->key.eth.type == htons(ETH_P_IP) || |
187 | flow->key.eth.type == htons(ETH_P_IPV6)) && | |
bf32fecd JG |
188 | flow->key.ip.proto == IPPROTO_TCP && |
189 | likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) { | |
ccb1352e JG |
190 | u8 *tcp = (u8 *)tcp_hdr(skb); |
191 | tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK; | |
192 | } | |
193 | ||
194 | spin_lock(&flow->lock); | |
195 | flow->used = jiffies; | |
196 | flow->packet_count++; | |
197 | flow->byte_count += skb->len; | |
198 | flow->tcp_flags |= tcp_flags; | |
199 | spin_unlock(&flow->lock); | |
200 | } | |
201 | ||
74f84a57 | 202 | struct sw_flow_actions *ovs_flow_actions_alloc(int size) |
ccb1352e | 203 | { |
ccb1352e JG |
204 | struct sw_flow_actions *sfa; |
205 | ||
74f84a57 | 206 | if (size > MAX_ACTIONS_BUFSIZE) |
ccb1352e JG |
207 | return ERR_PTR(-EINVAL); |
208 | ||
74f84a57 | 209 | sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); |
ccb1352e JG |
210 | if (!sfa) |
211 | return ERR_PTR(-ENOMEM); | |
212 | ||
74f84a57 | 213 | sfa->actions_len = 0; |
ccb1352e JG |
214 | return sfa; |
215 | } | |
216 | ||
217 | struct sw_flow *ovs_flow_alloc(void) | |
218 | { | |
219 | struct sw_flow *flow; | |
220 | ||
221 | flow = kmem_cache_alloc(flow_cache, GFP_KERNEL); | |
222 | if (!flow) | |
223 | return ERR_PTR(-ENOMEM); | |
224 | ||
225 | spin_lock_init(&flow->lock); | |
226 | flow->sf_acts = NULL; | |
227 | ||
228 | return flow; | |
229 | } | |
230 | ||
231 | static struct hlist_head *find_bucket(struct flow_table *table, u32 hash) | |
232 | { | |
233 | hash = jhash_1word(hash, table->hash_seed); | |
234 | return flex_array_get(table->buckets, | |
235 | (hash & (table->n_buckets - 1))); | |
236 | } | |
237 | ||
238 | static struct flex_array *alloc_buckets(unsigned int n_buckets) | |
239 | { | |
240 | struct flex_array *buckets; | |
241 | int i, err; | |
242 | ||
42415c90 | 243 | buckets = flex_array_alloc(sizeof(struct hlist_head), |
ccb1352e JG |
244 | n_buckets, GFP_KERNEL); |
245 | if (!buckets) | |
246 | return NULL; | |
247 | ||
248 | err = flex_array_prealloc(buckets, 0, n_buckets, GFP_KERNEL); | |
249 | if (err) { | |
250 | flex_array_free(buckets); | |
251 | return NULL; | |
252 | } | |
253 | ||
254 | for (i = 0; i < n_buckets; i++) | |
255 | INIT_HLIST_HEAD((struct hlist_head *) | |
256 | flex_array_get(buckets, i)); | |
257 | ||
258 | return buckets; | |
259 | } | |
260 | ||
261 | static void free_buckets(struct flex_array *buckets) | |
262 | { | |
263 | flex_array_free(buckets); | |
264 | } | |
265 | ||
266 | struct flow_table *ovs_flow_tbl_alloc(int new_size) | |
267 | { | |
268 | struct flow_table *table = kmalloc(sizeof(*table), GFP_KERNEL); | |
269 | ||
270 | if (!table) | |
271 | return NULL; | |
272 | ||
273 | table->buckets = alloc_buckets(new_size); | |
274 | ||
275 | if (!table->buckets) { | |
276 | kfree(table); | |
277 | return NULL; | |
278 | } | |
279 | table->n_buckets = new_size; | |
280 | table->count = 0; | |
281 | table->node_ver = 0; | |
282 | table->keep_flows = false; | |
283 | get_random_bytes(&table->hash_seed, sizeof(u32)); | |
284 | ||
285 | return table; | |
286 | } | |
287 | ||
288 | void ovs_flow_tbl_destroy(struct flow_table *table) | |
289 | { | |
290 | int i; | |
291 | ||
292 | if (!table) | |
293 | return; | |
294 | ||
295 | if (table->keep_flows) | |
296 | goto skip_flows; | |
297 | ||
298 | for (i = 0; i < table->n_buckets; i++) { | |
299 | struct sw_flow *flow; | |
300 | struct hlist_head *head = flex_array_get(table->buckets, i); | |
b67bfe0d | 301 | struct hlist_node *n; |
ccb1352e JG |
302 | int ver = table->node_ver; |
303 | ||
b67bfe0d | 304 | hlist_for_each_entry_safe(flow, n, head, hash_node[ver]) { |
ccb1352e JG |
305 | hlist_del_rcu(&flow->hash_node[ver]); |
306 | ovs_flow_free(flow); | |
307 | } | |
308 | } | |
309 | ||
310 | skip_flows: | |
311 | free_buckets(table->buckets); | |
312 | kfree(table); | |
313 | } | |
314 | ||
315 | static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu) | |
316 | { | |
317 | struct flow_table *table = container_of(rcu, struct flow_table, rcu); | |
318 | ||
319 | ovs_flow_tbl_destroy(table); | |
320 | } | |
321 | ||
322 | void ovs_flow_tbl_deferred_destroy(struct flow_table *table) | |
323 | { | |
324 | if (!table) | |
325 | return; | |
326 | ||
327 | call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb); | |
328 | } | |
329 | ||
330 | struct sw_flow *ovs_flow_tbl_next(struct flow_table *table, u32 *bucket, u32 *last) | |
331 | { | |
332 | struct sw_flow *flow; | |
333 | struct hlist_head *head; | |
ccb1352e JG |
334 | int ver; |
335 | int i; | |
336 | ||
337 | ver = table->node_ver; | |
338 | while (*bucket < table->n_buckets) { | |
339 | i = 0; | |
340 | head = flex_array_get(table->buckets, *bucket); | |
b67bfe0d | 341 | hlist_for_each_entry_rcu(flow, head, hash_node[ver]) { |
ccb1352e JG |
342 | if (i < *last) { |
343 | i++; | |
344 | continue; | |
345 | } | |
346 | *last = i + 1; | |
347 | return flow; | |
348 | } | |
349 | (*bucket)++; | |
350 | *last = 0; | |
351 | } | |
352 | ||
353 | return NULL; | |
354 | } | |
355 | ||
a3e82996 PS |
356 | static void __flow_tbl_insert(struct flow_table *table, struct sw_flow *flow) |
357 | { | |
358 | struct hlist_head *head; | |
359 | head = find_bucket(table, flow->hash); | |
360 | hlist_add_head_rcu(&flow->hash_node[table->node_ver], head); | |
361 | table->count++; | |
362 | } | |
363 | ||
ccb1352e JG |
364 | static void flow_table_copy_flows(struct flow_table *old, struct flow_table *new) |
365 | { | |
366 | int old_ver; | |
367 | int i; | |
368 | ||
369 | old_ver = old->node_ver; | |
370 | new->node_ver = !old_ver; | |
371 | ||
372 | /* Insert in new table. */ | |
373 | for (i = 0; i < old->n_buckets; i++) { | |
374 | struct sw_flow *flow; | |
375 | struct hlist_head *head; | |
ccb1352e JG |
376 | |
377 | head = flex_array_get(old->buckets, i); | |
378 | ||
b67bfe0d | 379 | hlist_for_each_entry(flow, head, hash_node[old_ver]) |
a3e82996 | 380 | __flow_tbl_insert(new, flow); |
ccb1352e JG |
381 | } |
382 | old->keep_flows = true; | |
383 | } | |
384 | ||
385 | static struct flow_table *__flow_tbl_rehash(struct flow_table *table, int n_buckets) | |
386 | { | |
387 | struct flow_table *new_table; | |
388 | ||
389 | new_table = ovs_flow_tbl_alloc(n_buckets); | |
390 | if (!new_table) | |
391 | return ERR_PTR(-ENOMEM); | |
392 | ||
393 | flow_table_copy_flows(table, new_table); | |
394 | ||
395 | return new_table; | |
396 | } | |
397 | ||
398 | struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table) | |
399 | { | |
400 | return __flow_tbl_rehash(table, table->n_buckets); | |
401 | } | |
402 | ||
403 | struct flow_table *ovs_flow_tbl_expand(struct flow_table *table) | |
404 | { | |
405 | return __flow_tbl_rehash(table, table->n_buckets * 2); | |
406 | } | |
407 | ||
408 | void ovs_flow_free(struct sw_flow *flow) | |
409 | { | |
410 | if (unlikely(!flow)) | |
411 | return; | |
412 | ||
413 | kfree((struct sf_flow_acts __force *)flow->sf_acts); | |
414 | kmem_cache_free(flow_cache, flow); | |
415 | } | |
416 | ||
417 | /* RCU callback used by ovs_flow_deferred_free. */ | |
418 | static void rcu_free_flow_callback(struct rcu_head *rcu) | |
419 | { | |
420 | struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu); | |
421 | ||
422 | ovs_flow_free(flow); | |
423 | } | |
424 | ||
425 | /* Schedules 'flow' to be freed after the next RCU grace period. | |
426 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
427 | void ovs_flow_deferred_free(struct sw_flow *flow) | |
428 | { | |
429 | call_rcu(&flow->rcu, rcu_free_flow_callback); | |
430 | } | |
431 | ||
ccb1352e JG |
432 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. |
433 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
434 | void ovs_flow_deferred_free_acts(struct sw_flow_actions *sf_acts) | |
435 | { | |
80f0fd8a | 436 | kfree_rcu(sf_acts, rcu); |
ccb1352e JG |
437 | } |
438 | ||
439 | static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key) | |
440 | { | |
441 | struct qtag_prefix { | |
442 | __be16 eth_type; /* ETH_P_8021Q */ | |
443 | __be16 tci; | |
444 | }; | |
445 | struct qtag_prefix *qp; | |
446 | ||
447 | if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16))) | |
448 | return 0; | |
449 | ||
450 | if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) + | |
451 | sizeof(__be16)))) | |
452 | return -ENOMEM; | |
453 | ||
454 | qp = (struct qtag_prefix *) skb->data; | |
455 | key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT); | |
456 | __skb_pull(skb, sizeof(struct qtag_prefix)); | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
461 | static __be16 parse_ethertype(struct sk_buff *skb) | |
462 | { | |
463 | struct llc_snap_hdr { | |
464 | u8 dsap; /* Always 0xAA */ | |
465 | u8 ssap; /* Always 0xAA */ | |
466 | u8 ctrl; | |
467 | u8 oui[3]; | |
468 | __be16 ethertype; | |
469 | }; | |
470 | struct llc_snap_hdr *llc; | |
471 | __be16 proto; | |
472 | ||
473 | proto = *(__be16 *) skb->data; | |
474 | __skb_pull(skb, sizeof(__be16)); | |
475 | ||
e5c5d22e | 476 | if (ntohs(proto) >= ETH_P_802_3_MIN) |
ccb1352e JG |
477 | return proto; |
478 | ||
479 | if (skb->len < sizeof(struct llc_snap_hdr)) | |
480 | return htons(ETH_P_802_2); | |
481 | ||
482 | if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr)))) | |
483 | return htons(0); | |
484 | ||
485 | llc = (struct llc_snap_hdr *) skb->data; | |
486 | if (llc->dsap != LLC_SAP_SNAP || | |
487 | llc->ssap != LLC_SAP_SNAP || | |
488 | (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0) | |
489 | return htons(ETH_P_802_2); | |
490 | ||
491 | __skb_pull(skb, sizeof(struct llc_snap_hdr)); | |
17b682a0 | 492 | |
e5c5d22e | 493 | if (ntohs(llc->ethertype) >= ETH_P_802_3_MIN) |
17b682a0 RL |
494 | return llc->ethertype; |
495 | ||
496 | return htons(ETH_P_802_2); | |
ccb1352e JG |
497 | } |
498 | ||
499 | static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key, | |
500 | int *key_lenp, int nh_len) | |
501 | { | |
502 | struct icmp6hdr *icmp = icmp6_hdr(skb); | |
503 | int error = 0; | |
504 | int key_len; | |
505 | ||
506 | /* The ICMPv6 type and code fields use the 16-bit transport port | |
507 | * fields, so we need to store them in 16-bit network byte order. | |
508 | */ | |
509 | key->ipv6.tp.src = htons(icmp->icmp6_type); | |
510 | key->ipv6.tp.dst = htons(icmp->icmp6_code); | |
511 | key_len = SW_FLOW_KEY_OFFSET(ipv6.tp); | |
512 | ||
513 | if (icmp->icmp6_code == 0 && | |
514 | (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
515 | icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
516 | int icmp_len = skb->len - skb_transport_offset(skb); | |
517 | struct nd_msg *nd; | |
518 | int offset; | |
519 | ||
520 | key_len = SW_FLOW_KEY_OFFSET(ipv6.nd); | |
521 | ||
522 | /* In order to process neighbor discovery options, we need the | |
523 | * entire packet. | |
524 | */ | |
525 | if (unlikely(icmp_len < sizeof(*nd))) | |
526 | goto out; | |
527 | if (unlikely(skb_linearize(skb))) { | |
528 | error = -ENOMEM; | |
529 | goto out; | |
530 | } | |
531 | ||
532 | nd = (struct nd_msg *)skb_transport_header(skb); | |
533 | key->ipv6.nd.target = nd->target; | |
534 | key_len = SW_FLOW_KEY_OFFSET(ipv6.nd); | |
535 | ||
536 | icmp_len -= sizeof(*nd); | |
537 | offset = 0; | |
538 | while (icmp_len >= 8) { | |
539 | struct nd_opt_hdr *nd_opt = | |
540 | (struct nd_opt_hdr *)(nd->opt + offset); | |
541 | int opt_len = nd_opt->nd_opt_len * 8; | |
542 | ||
543 | if (unlikely(!opt_len || opt_len > icmp_len)) | |
544 | goto invalid; | |
545 | ||
546 | /* Store the link layer address if the appropriate | |
547 | * option is provided. It is considered an error if | |
548 | * the same link layer option is specified twice. | |
549 | */ | |
550 | if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR | |
551 | && opt_len == 8) { | |
552 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll))) | |
553 | goto invalid; | |
554 | memcpy(key->ipv6.nd.sll, | |
555 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); | |
556 | } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR | |
557 | && opt_len == 8) { | |
558 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll))) | |
559 | goto invalid; | |
560 | memcpy(key->ipv6.nd.tll, | |
561 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); | |
562 | } | |
563 | ||
564 | icmp_len -= opt_len; | |
565 | offset += opt_len; | |
566 | } | |
567 | } | |
568 | ||
569 | goto out; | |
570 | ||
571 | invalid: | |
572 | memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target)); | |
573 | memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll)); | |
574 | memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll)); | |
575 | ||
576 | out: | |
577 | *key_lenp = key_len; | |
578 | return error; | |
579 | } | |
580 | ||
581 | /** | |
582 | * ovs_flow_extract - extracts a flow key from an Ethernet frame. | |
583 | * @skb: sk_buff that contains the frame, with skb->data pointing to the | |
584 | * Ethernet header | |
585 | * @in_port: port number on which @skb was received. | |
586 | * @key: output flow key | |
587 | * @key_lenp: length of output flow key | |
588 | * | |
589 | * The caller must ensure that skb->len >= ETH_HLEN. | |
590 | * | |
591 | * Returns 0 if successful, otherwise a negative errno value. | |
592 | * | |
593 | * Initializes @skb header pointers as follows: | |
594 | * | |
595 | * - skb->mac_header: the Ethernet header. | |
596 | * | |
597 | * - skb->network_header: just past the Ethernet header, or just past the | |
598 | * VLAN header, to the first byte of the Ethernet payload. | |
599 | * | |
34d94f21 | 600 | * - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6 |
ccb1352e JG |
601 | * on output, then just past the IP header, if one is present and |
602 | * of a correct length, otherwise the same as skb->network_header. | |
34d94f21 | 603 | * For other key->eth.type values it is left untouched. |
ccb1352e JG |
604 | */ |
605 | int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key, | |
606 | int *key_lenp) | |
607 | { | |
608 | int error = 0; | |
609 | int key_len = SW_FLOW_KEY_OFFSET(eth); | |
610 | struct ethhdr *eth; | |
611 | ||
612 | memset(key, 0, sizeof(*key)); | |
613 | ||
614 | key->phy.priority = skb->priority; | |
7d5437c7 PS |
615 | if (OVS_CB(skb)->tun_key) |
616 | memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key)); | |
ccb1352e | 617 | key->phy.in_port = in_port; |
39c7caeb | 618 | key->phy.skb_mark = skb->mark; |
ccb1352e JG |
619 | |
620 | skb_reset_mac_header(skb); | |
621 | ||
622 | /* Link layer. We are guaranteed to have at least the 14 byte Ethernet | |
623 | * header in the linear data area. | |
624 | */ | |
625 | eth = eth_hdr(skb); | |
626 | memcpy(key->eth.src, eth->h_source, ETH_ALEN); | |
627 | memcpy(key->eth.dst, eth->h_dest, ETH_ALEN); | |
628 | ||
629 | __skb_pull(skb, 2 * ETH_ALEN); | |
b34df5e8 PS |
630 | /* We are going to push all headers that we pull, so no need to |
631 | * update skb->csum here. | |
632 | */ | |
ccb1352e JG |
633 | |
634 | if (vlan_tx_tag_present(skb)) | |
635 | key->eth.tci = htons(skb->vlan_tci); | |
636 | else if (eth->h_proto == htons(ETH_P_8021Q)) | |
637 | if (unlikely(parse_vlan(skb, key))) | |
638 | return -ENOMEM; | |
639 | ||
640 | key->eth.type = parse_ethertype(skb); | |
641 | if (unlikely(key->eth.type == htons(0))) | |
642 | return -ENOMEM; | |
643 | ||
644 | skb_reset_network_header(skb); | |
645 | __skb_push(skb, skb->data - skb_mac_header(skb)); | |
646 | ||
647 | /* Network layer. */ | |
648 | if (key->eth.type == htons(ETH_P_IP)) { | |
649 | struct iphdr *nh; | |
650 | __be16 offset; | |
651 | ||
652 | key_len = SW_FLOW_KEY_OFFSET(ipv4.addr); | |
653 | ||
654 | error = check_iphdr(skb); | |
655 | if (unlikely(error)) { | |
656 | if (error == -EINVAL) { | |
657 | skb->transport_header = skb->network_header; | |
658 | error = 0; | |
659 | } | |
660 | goto out; | |
661 | } | |
662 | ||
663 | nh = ip_hdr(skb); | |
664 | key->ipv4.addr.src = nh->saddr; | |
665 | key->ipv4.addr.dst = nh->daddr; | |
666 | ||
667 | key->ip.proto = nh->protocol; | |
668 | key->ip.tos = nh->tos; | |
669 | key->ip.ttl = nh->ttl; | |
670 | ||
671 | offset = nh->frag_off & htons(IP_OFFSET); | |
672 | if (offset) { | |
673 | key->ip.frag = OVS_FRAG_TYPE_LATER; | |
674 | goto out; | |
675 | } | |
676 | if (nh->frag_off & htons(IP_MF) || | |
677 | skb_shinfo(skb)->gso_type & SKB_GSO_UDP) | |
678 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
679 | ||
680 | /* Transport layer. */ | |
681 | if (key->ip.proto == IPPROTO_TCP) { | |
682 | key_len = SW_FLOW_KEY_OFFSET(ipv4.tp); | |
683 | if (tcphdr_ok(skb)) { | |
684 | struct tcphdr *tcp = tcp_hdr(skb); | |
685 | key->ipv4.tp.src = tcp->source; | |
686 | key->ipv4.tp.dst = tcp->dest; | |
687 | } | |
688 | } else if (key->ip.proto == IPPROTO_UDP) { | |
689 | key_len = SW_FLOW_KEY_OFFSET(ipv4.tp); | |
690 | if (udphdr_ok(skb)) { | |
691 | struct udphdr *udp = udp_hdr(skb); | |
692 | key->ipv4.tp.src = udp->source; | |
693 | key->ipv4.tp.dst = udp->dest; | |
694 | } | |
695 | } else if (key->ip.proto == IPPROTO_ICMP) { | |
696 | key_len = SW_FLOW_KEY_OFFSET(ipv4.tp); | |
697 | if (icmphdr_ok(skb)) { | |
698 | struct icmphdr *icmp = icmp_hdr(skb); | |
699 | /* The ICMP type and code fields use the 16-bit | |
700 | * transport port fields, so we need to store | |
701 | * them in 16-bit network byte order. */ | |
702 | key->ipv4.tp.src = htons(icmp->type); | |
703 | key->ipv4.tp.dst = htons(icmp->code); | |
704 | } | |
705 | } | |
706 | ||
c0618533 MM |
707 | } else if ((key->eth.type == htons(ETH_P_ARP) || |
708 | key->eth.type == htons(ETH_P_RARP)) && arphdr_ok(skb)) { | |
ccb1352e JG |
709 | struct arp_eth_header *arp; |
710 | ||
711 | arp = (struct arp_eth_header *)skb_network_header(skb); | |
712 | ||
713 | if (arp->ar_hrd == htons(ARPHRD_ETHER) | |
714 | && arp->ar_pro == htons(ETH_P_IP) | |
715 | && arp->ar_hln == ETH_ALEN | |
716 | && arp->ar_pln == 4) { | |
717 | ||
718 | /* We only match on the lower 8 bits of the opcode. */ | |
719 | if (ntohs(arp->ar_op) <= 0xff) | |
720 | key->ip.proto = ntohs(arp->ar_op); | |
d04d3829 MM |
721 | memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src)); |
722 | memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst)); | |
723 | memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN); | |
724 | memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN); | |
725 | key_len = SW_FLOW_KEY_OFFSET(ipv4.arp); | |
ccb1352e JG |
726 | } |
727 | } else if (key->eth.type == htons(ETH_P_IPV6)) { | |
728 | int nh_len; /* IPv6 Header + Extensions */ | |
729 | ||
730 | nh_len = parse_ipv6hdr(skb, key, &key_len); | |
731 | if (unlikely(nh_len < 0)) { | |
732 | if (nh_len == -EINVAL) | |
733 | skb->transport_header = skb->network_header; | |
734 | else | |
735 | error = nh_len; | |
736 | goto out; | |
737 | } | |
738 | ||
739 | if (key->ip.frag == OVS_FRAG_TYPE_LATER) | |
740 | goto out; | |
741 | if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) | |
742 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
743 | ||
744 | /* Transport layer. */ | |
745 | if (key->ip.proto == NEXTHDR_TCP) { | |
746 | key_len = SW_FLOW_KEY_OFFSET(ipv6.tp); | |
747 | if (tcphdr_ok(skb)) { | |
748 | struct tcphdr *tcp = tcp_hdr(skb); | |
749 | key->ipv6.tp.src = tcp->source; | |
750 | key->ipv6.tp.dst = tcp->dest; | |
751 | } | |
752 | } else if (key->ip.proto == NEXTHDR_UDP) { | |
753 | key_len = SW_FLOW_KEY_OFFSET(ipv6.tp); | |
754 | if (udphdr_ok(skb)) { | |
755 | struct udphdr *udp = udp_hdr(skb); | |
756 | key->ipv6.tp.src = udp->source; | |
757 | key->ipv6.tp.dst = udp->dest; | |
758 | } | |
759 | } else if (key->ip.proto == NEXTHDR_ICMP) { | |
760 | key_len = SW_FLOW_KEY_OFFSET(ipv6.tp); | |
761 | if (icmp6hdr_ok(skb)) { | |
762 | error = parse_icmpv6(skb, key, &key_len, nh_len); | |
763 | if (error < 0) | |
764 | goto out; | |
765 | } | |
766 | } | |
767 | } | |
768 | ||
769 | out: | |
770 | *key_lenp = key_len; | |
771 | return error; | |
772 | } | |
773 | ||
a3e82996 PS |
774 | static u32 ovs_flow_hash(const struct sw_flow_key *key, int key_start, int key_len) |
775 | { | |
776 | return jhash2((u32 *)((u8 *)key + key_start), | |
777 | DIV_ROUND_UP(key_len - key_start, sizeof(u32)), 0); | |
778 | } | |
779 | ||
780 | static int flow_key_start(struct sw_flow_key *key) | |
ccb1352e | 781 | { |
a3e82996 PS |
782 | if (key->tun_key.ipv4_dst) |
783 | return 0; | |
784 | else | |
785 | return offsetof(struct sw_flow_key, phy); | |
ccb1352e JG |
786 | } |
787 | ||
788 | struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *table, | |
789 | struct sw_flow_key *key, int key_len) | |
790 | { | |
791 | struct sw_flow *flow; | |
ccb1352e | 792 | struct hlist_head *head; |
a3e82996 PS |
793 | u8 *_key; |
794 | int key_start; | |
ccb1352e JG |
795 | u32 hash; |
796 | ||
a3e82996 PS |
797 | key_start = flow_key_start(key); |
798 | hash = ovs_flow_hash(key, key_start, key_len); | |
ccb1352e | 799 | |
a3e82996 | 800 | _key = (u8 *) key + key_start; |
ccb1352e | 801 | head = find_bucket(table, hash); |
b67bfe0d | 802 | hlist_for_each_entry_rcu(flow, head, hash_node[table->node_ver]) { |
ccb1352e JG |
803 | |
804 | if (flow->hash == hash && | |
a3e82996 | 805 | !memcmp((u8 *)&flow->key + key_start, _key, key_len - key_start)) { |
ccb1352e JG |
806 | return flow; |
807 | } | |
808 | } | |
809 | return NULL; | |
810 | } | |
811 | ||
a3e82996 PS |
812 | void ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow, |
813 | struct sw_flow_key *key, int key_len) | |
ccb1352e | 814 | { |
a3e82996 PS |
815 | flow->hash = ovs_flow_hash(key, flow_key_start(key), key_len); |
816 | memcpy(&flow->key, key, sizeof(flow->key)); | |
817 | __flow_tbl_insert(table, flow); | |
ccb1352e JG |
818 | } |
819 | ||
820 | void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow) | |
821 | { | |
d3e1101c | 822 | BUG_ON(table->count == 0); |
ccb1352e JG |
823 | hlist_del_rcu(&flow->hash_node[table->node_ver]); |
824 | table->count--; | |
ccb1352e JG |
825 | } |
826 | ||
827 | /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ | |
828 | const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { | |
829 | [OVS_KEY_ATTR_ENCAP] = -1, | |
830 | [OVS_KEY_ATTR_PRIORITY] = sizeof(u32), | |
831 | [OVS_KEY_ATTR_IN_PORT] = sizeof(u32), | |
39c7caeb | 832 | [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32), |
ccb1352e JG |
833 | [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet), |
834 | [OVS_KEY_ATTR_VLAN] = sizeof(__be16), | |
835 | [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16), | |
836 | [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4), | |
837 | [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6), | |
838 | [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp), | |
839 | [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp), | |
840 | [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp), | |
841 | [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6), | |
842 | [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp), | |
843 | [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd), | |
7d5437c7 | 844 | [OVS_KEY_ATTR_TUNNEL] = -1, |
ccb1352e JG |
845 | }; |
846 | ||
847 | static int ipv4_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_len, | |
848 | const struct nlattr *a[], u32 *attrs) | |
849 | { | |
850 | const struct ovs_key_icmp *icmp_key; | |
851 | const struct ovs_key_tcp *tcp_key; | |
852 | const struct ovs_key_udp *udp_key; | |
853 | ||
854 | switch (swkey->ip.proto) { | |
855 | case IPPROTO_TCP: | |
856 | if (!(*attrs & (1 << OVS_KEY_ATTR_TCP))) | |
857 | return -EINVAL; | |
858 | *attrs &= ~(1 << OVS_KEY_ATTR_TCP); | |
859 | ||
860 | *key_len = SW_FLOW_KEY_OFFSET(ipv4.tp); | |
861 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); | |
862 | swkey->ipv4.tp.src = tcp_key->tcp_src; | |
863 | swkey->ipv4.tp.dst = tcp_key->tcp_dst; | |
864 | break; | |
865 | ||
866 | case IPPROTO_UDP: | |
867 | if (!(*attrs & (1 << OVS_KEY_ATTR_UDP))) | |
868 | return -EINVAL; | |
869 | *attrs &= ~(1 << OVS_KEY_ATTR_UDP); | |
870 | ||
871 | *key_len = SW_FLOW_KEY_OFFSET(ipv4.tp); | |
872 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); | |
873 | swkey->ipv4.tp.src = udp_key->udp_src; | |
874 | swkey->ipv4.tp.dst = udp_key->udp_dst; | |
875 | break; | |
876 | ||
877 | case IPPROTO_ICMP: | |
878 | if (!(*attrs & (1 << OVS_KEY_ATTR_ICMP))) | |
879 | return -EINVAL; | |
880 | *attrs &= ~(1 << OVS_KEY_ATTR_ICMP); | |
881 | ||
882 | *key_len = SW_FLOW_KEY_OFFSET(ipv4.tp); | |
883 | icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); | |
884 | swkey->ipv4.tp.src = htons(icmp_key->icmp_type); | |
885 | swkey->ipv4.tp.dst = htons(icmp_key->icmp_code); | |
886 | break; | |
887 | } | |
888 | ||
889 | return 0; | |
890 | } | |
891 | ||
892 | static int ipv6_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_len, | |
893 | const struct nlattr *a[], u32 *attrs) | |
894 | { | |
895 | const struct ovs_key_icmpv6 *icmpv6_key; | |
896 | const struct ovs_key_tcp *tcp_key; | |
897 | const struct ovs_key_udp *udp_key; | |
898 | ||
899 | switch (swkey->ip.proto) { | |
900 | case IPPROTO_TCP: | |
901 | if (!(*attrs & (1 << OVS_KEY_ATTR_TCP))) | |
902 | return -EINVAL; | |
903 | *attrs &= ~(1 << OVS_KEY_ATTR_TCP); | |
904 | ||
905 | *key_len = SW_FLOW_KEY_OFFSET(ipv6.tp); | |
906 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); | |
907 | swkey->ipv6.tp.src = tcp_key->tcp_src; | |
908 | swkey->ipv6.tp.dst = tcp_key->tcp_dst; | |
909 | break; | |
910 | ||
911 | case IPPROTO_UDP: | |
912 | if (!(*attrs & (1 << OVS_KEY_ATTR_UDP))) | |
913 | return -EINVAL; | |
914 | *attrs &= ~(1 << OVS_KEY_ATTR_UDP); | |
915 | ||
916 | *key_len = SW_FLOW_KEY_OFFSET(ipv6.tp); | |
917 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); | |
918 | swkey->ipv6.tp.src = udp_key->udp_src; | |
919 | swkey->ipv6.tp.dst = udp_key->udp_dst; | |
920 | break; | |
921 | ||
922 | case IPPROTO_ICMPV6: | |
923 | if (!(*attrs & (1 << OVS_KEY_ATTR_ICMPV6))) | |
924 | return -EINVAL; | |
925 | *attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6); | |
926 | ||
927 | *key_len = SW_FLOW_KEY_OFFSET(ipv6.tp); | |
928 | icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); | |
929 | swkey->ipv6.tp.src = htons(icmpv6_key->icmpv6_type); | |
930 | swkey->ipv6.tp.dst = htons(icmpv6_key->icmpv6_code); | |
931 | ||
932 | if (swkey->ipv6.tp.src == htons(NDISC_NEIGHBOUR_SOLICITATION) || | |
933 | swkey->ipv6.tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
934 | const struct ovs_key_nd *nd_key; | |
935 | ||
936 | if (!(*attrs & (1 << OVS_KEY_ATTR_ND))) | |
937 | return -EINVAL; | |
938 | *attrs &= ~(1 << OVS_KEY_ATTR_ND); | |
939 | ||
940 | *key_len = SW_FLOW_KEY_OFFSET(ipv6.nd); | |
941 | nd_key = nla_data(a[OVS_KEY_ATTR_ND]); | |
942 | memcpy(&swkey->ipv6.nd.target, nd_key->nd_target, | |
943 | sizeof(swkey->ipv6.nd.target)); | |
944 | memcpy(swkey->ipv6.nd.sll, nd_key->nd_sll, ETH_ALEN); | |
945 | memcpy(swkey->ipv6.nd.tll, nd_key->nd_tll, ETH_ALEN); | |
946 | } | |
947 | break; | |
948 | } | |
949 | ||
950 | return 0; | |
951 | } | |
952 | ||
953 | static int parse_flow_nlattrs(const struct nlattr *attr, | |
954 | const struct nlattr *a[], u32 *attrsp) | |
955 | { | |
956 | const struct nlattr *nla; | |
957 | u32 attrs; | |
958 | int rem; | |
959 | ||
960 | attrs = 0; | |
961 | nla_for_each_nested(nla, attr, rem) { | |
962 | u16 type = nla_type(nla); | |
963 | int expected_len; | |
964 | ||
965 | if (type > OVS_KEY_ATTR_MAX || attrs & (1 << type)) | |
966 | return -EINVAL; | |
967 | ||
968 | expected_len = ovs_key_lens[type]; | |
969 | if (nla_len(nla) != expected_len && expected_len != -1) | |
970 | return -EINVAL; | |
971 | ||
972 | attrs |= 1 << type; | |
973 | a[type] = nla; | |
974 | } | |
975 | if (rem) | |
976 | return -EINVAL; | |
977 | ||
978 | *attrsp = attrs; | |
979 | return 0; | |
980 | } | |
981 | ||
7d5437c7 PS |
982 | int ovs_ipv4_tun_from_nlattr(const struct nlattr *attr, |
983 | struct ovs_key_ipv4_tunnel *tun_key) | |
984 | { | |
985 | struct nlattr *a; | |
986 | int rem; | |
987 | bool ttl = false; | |
988 | ||
989 | memset(tun_key, 0, sizeof(*tun_key)); | |
990 | ||
991 | nla_for_each_nested(a, attr, rem) { | |
992 | int type = nla_type(a); | |
993 | static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = { | |
994 | [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64), | |
995 | [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32), | |
996 | [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32), | |
997 | [OVS_TUNNEL_KEY_ATTR_TOS] = 1, | |
998 | [OVS_TUNNEL_KEY_ATTR_TTL] = 1, | |
999 | [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0, | |
1000 | [OVS_TUNNEL_KEY_ATTR_CSUM] = 0, | |
1001 | }; | |
1002 | ||
1003 | if (type > OVS_TUNNEL_KEY_ATTR_MAX || | |
1004 | ovs_tunnel_key_lens[type] != nla_len(a)) | |
1005 | return -EINVAL; | |
1006 | ||
1007 | switch (type) { | |
1008 | case OVS_TUNNEL_KEY_ATTR_ID: | |
1009 | tun_key->tun_id = nla_get_be64(a); | |
1010 | tun_key->tun_flags |= TUNNEL_KEY; | |
1011 | break; | |
1012 | case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: | |
1013 | tun_key->ipv4_src = nla_get_be32(a); | |
1014 | break; | |
1015 | case OVS_TUNNEL_KEY_ATTR_IPV4_DST: | |
1016 | tun_key->ipv4_dst = nla_get_be32(a); | |
1017 | break; | |
1018 | case OVS_TUNNEL_KEY_ATTR_TOS: | |
1019 | tun_key->ipv4_tos = nla_get_u8(a); | |
1020 | break; | |
1021 | case OVS_TUNNEL_KEY_ATTR_TTL: | |
1022 | tun_key->ipv4_ttl = nla_get_u8(a); | |
1023 | ttl = true; | |
1024 | break; | |
1025 | case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: | |
1026 | tun_key->tun_flags |= TUNNEL_DONT_FRAGMENT; | |
1027 | break; | |
1028 | case OVS_TUNNEL_KEY_ATTR_CSUM: | |
1029 | tun_key->tun_flags |= TUNNEL_CSUM; | |
1030 | break; | |
1031 | default: | |
1032 | return -EINVAL; | |
1033 | ||
1034 | } | |
1035 | } | |
1036 | if (rem > 0) | |
1037 | return -EINVAL; | |
1038 | ||
1039 | if (!tun_key->ipv4_dst) | |
1040 | return -EINVAL; | |
1041 | ||
1042 | if (!ttl) | |
1043 | return -EINVAL; | |
1044 | ||
1045 | return 0; | |
1046 | } | |
1047 | ||
1048 | int ovs_ipv4_tun_to_nlattr(struct sk_buff *skb, | |
1049 | const struct ovs_key_ipv4_tunnel *tun_key) | |
1050 | { | |
1051 | struct nlattr *nla; | |
1052 | ||
1053 | nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL); | |
1054 | if (!nla) | |
1055 | return -EMSGSIZE; | |
1056 | ||
1057 | if (tun_key->tun_flags & TUNNEL_KEY && | |
1058 | nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, tun_key->tun_id)) | |
1059 | return -EMSGSIZE; | |
1060 | if (tun_key->ipv4_src && | |
1061 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, tun_key->ipv4_src)) | |
1062 | return -EMSGSIZE; | |
1063 | if (nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, tun_key->ipv4_dst)) | |
1064 | return -EMSGSIZE; | |
1065 | if (tun_key->ipv4_tos && | |
1066 | nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, tun_key->ipv4_tos)) | |
1067 | return -EMSGSIZE; | |
1068 | if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, tun_key->ipv4_ttl)) | |
1069 | return -EMSGSIZE; | |
1070 | if ((tun_key->tun_flags & TUNNEL_DONT_FRAGMENT) && | |
1071 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT)) | |
1072 | return -EMSGSIZE; | |
1073 | if ((tun_key->tun_flags & TUNNEL_CSUM) && | |
1074 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM)) | |
1075 | return -EMSGSIZE; | |
1076 | ||
1077 | nla_nest_end(skb, nla); | |
1078 | return 0; | |
1079 | } | |
1080 | ||
ccb1352e JG |
1081 | /** |
1082 | * ovs_flow_from_nlattrs - parses Netlink attributes into a flow key. | |
1083 | * @swkey: receives the extracted flow key. | |
1084 | * @key_lenp: number of bytes used in @swkey. | |
1085 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute | |
1086 | * sequence. | |
1087 | */ | |
1088 | int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp, | |
1089 | const struct nlattr *attr) | |
1090 | { | |
1091 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; | |
1092 | const struct ovs_key_ethernet *eth_key; | |
1093 | int key_len; | |
1094 | u32 attrs; | |
1095 | int err; | |
1096 | ||
1097 | memset(swkey, 0, sizeof(struct sw_flow_key)); | |
1098 | key_len = SW_FLOW_KEY_OFFSET(eth); | |
1099 | ||
1100 | err = parse_flow_nlattrs(attr, a, &attrs); | |
1101 | if (err) | |
1102 | return err; | |
1103 | ||
1104 | /* Metadata attributes. */ | |
1105 | if (attrs & (1 << OVS_KEY_ATTR_PRIORITY)) { | |
1106 | swkey->phy.priority = nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]); | |
1107 | attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY); | |
1108 | } | |
1109 | if (attrs & (1 << OVS_KEY_ATTR_IN_PORT)) { | |
1110 | u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); | |
1111 | if (in_port >= DP_MAX_PORTS) | |
1112 | return -EINVAL; | |
1113 | swkey->phy.in_port = in_port; | |
1114 | attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT); | |
1115 | } else { | |
15eac2a7 | 1116 | swkey->phy.in_port = DP_MAX_PORTS; |
ccb1352e | 1117 | } |
39c7caeb AA |
1118 | if (attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) { |
1119 | swkey->phy.skb_mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); | |
1120 | attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK); | |
1121 | } | |
ccb1352e | 1122 | |
7d5437c7 PS |
1123 | if (attrs & (1 << OVS_KEY_ATTR_TUNNEL)) { |
1124 | err = ovs_ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], &swkey->tun_key); | |
1125 | if (err) | |
1126 | return err; | |
1127 | ||
1128 | attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL); | |
1129 | } | |
1130 | ||
ccb1352e JG |
1131 | /* Data attributes. */ |
1132 | if (!(attrs & (1 << OVS_KEY_ATTR_ETHERNET))) | |
1133 | return -EINVAL; | |
1134 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET); | |
1135 | ||
1136 | eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); | |
1137 | memcpy(swkey->eth.src, eth_key->eth_src, ETH_ALEN); | |
1138 | memcpy(swkey->eth.dst, eth_key->eth_dst, ETH_ALEN); | |
1139 | ||
1140 | if (attrs & (1u << OVS_KEY_ATTR_ETHERTYPE) && | |
1141 | nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q)) { | |
1142 | const struct nlattr *encap; | |
1143 | __be16 tci; | |
1144 | ||
1145 | if (attrs != ((1 << OVS_KEY_ATTR_VLAN) | | |
1146 | (1 << OVS_KEY_ATTR_ETHERTYPE) | | |
1147 | (1 << OVS_KEY_ATTR_ENCAP))) | |
1148 | return -EINVAL; | |
1149 | ||
1150 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
1151 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
1152 | if (tci & htons(VLAN_TAG_PRESENT)) { | |
1153 | swkey->eth.tci = tci; | |
1154 | ||
1155 | err = parse_flow_nlattrs(encap, a, &attrs); | |
1156 | if (err) | |
1157 | return err; | |
1158 | } else if (!tci) { | |
1159 | /* Corner case for truncated 802.1Q header. */ | |
1160 | if (nla_len(encap)) | |
1161 | return -EINVAL; | |
1162 | ||
1163 | swkey->eth.type = htons(ETH_P_8021Q); | |
1164 | *key_lenp = key_len; | |
1165 | return 0; | |
1166 | } else { | |
1167 | return -EINVAL; | |
1168 | } | |
1169 | } | |
1170 | ||
1171 | if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) { | |
1172 | swkey->eth.type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
e5c5d22e | 1173 | if (ntohs(swkey->eth.type) < ETH_P_802_3_MIN) |
ccb1352e JG |
1174 | return -EINVAL; |
1175 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
1176 | } else { | |
1177 | swkey->eth.type = htons(ETH_P_802_2); | |
1178 | } | |
1179 | ||
1180 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
1181 | const struct ovs_key_ipv4 *ipv4_key; | |
1182 | ||
1183 | if (!(attrs & (1 << OVS_KEY_ATTR_IPV4))) | |
1184 | return -EINVAL; | |
1185 | attrs &= ~(1 << OVS_KEY_ATTR_IPV4); | |
1186 | ||
1187 | key_len = SW_FLOW_KEY_OFFSET(ipv4.addr); | |
1188 | ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); | |
1189 | if (ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) | |
1190 | return -EINVAL; | |
1191 | swkey->ip.proto = ipv4_key->ipv4_proto; | |
1192 | swkey->ip.tos = ipv4_key->ipv4_tos; | |
1193 | swkey->ip.ttl = ipv4_key->ipv4_ttl; | |
1194 | swkey->ip.frag = ipv4_key->ipv4_frag; | |
1195 | swkey->ipv4.addr.src = ipv4_key->ipv4_src; | |
1196 | swkey->ipv4.addr.dst = ipv4_key->ipv4_dst; | |
1197 | ||
1198 | if (swkey->ip.frag != OVS_FRAG_TYPE_LATER) { | |
1199 | err = ipv4_flow_from_nlattrs(swkey, &key_len, a, &attrs); | |
1200 | if (err) | |
1201 | return err; | |
1202 | } | |
1203 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1204 | const struct ovs_key_ipv6 *ipv6_key; | |
1205 | ||
1206 | if (!(attrs & (1 << OVS_KEY_ATTR_IPV6))) | |
1207 | return -EINVAL; | |
1208 | attrs &= ~(1 << OVS_KEY_ATTR_IPV6); | |
1209 | ||
1210 | key_len = SW_FLOW_KEY_OFFSET(ipv6.label); | |
1211 | ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); | |
1212 | if (ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) | |
1213 | return -EINVAL; | |
1214 | swkey->ipv6.label = ipv6_key->ipv6_label; | |
1215 | swkey->ip.proto = ipv6_key->ipv6_proto; | |
1216 | swkey->ip.tos = ipv6_key->ipv6_tclass; | |
1217 | swkey->ip.ttl = ipv6_key->ipv6_hlimit; | |
1218 | swkey->ip.frag = ipv6_key->ipv6_frag; | |
1219 | memcpy(&swkey->ipv6.addr.src, ipv6_key->ipv6_src, | |
1220 | sizeof(swkey->ipv6.addr.src)); | |
1221 | memcpy(&swkey->ipv6.addr.dst, ipv6_key->ipv6_dst, | |
1222 | sizeof(swkey->ipv6.addr.dst)); | |
1223 | ||
1224 | if (swkey->ip.frag != OVS_FRAG_TYPE_LATER) { | |
1225 | err = ipv6_flow_from_nlattrs(swkey, &key_len, a, &attrs); | |
1226 | if (err) | |
1227 | return err; | |
1228 | } | |
c0618533 MM |
1229 | } else if (swkey->eth.type == htons(ETH_P_ARP) || |
1230 | swkey->eth.type == htons(ETH_P_RARP)) { | |
ccb1352e JG |
1231 | const struct ovs_key_arp *arp_key; |
1232 | ||
1233 | if (!(attrs & (1 << OVS_KEY_ATTR_ARP))) | |
1234 | return -EINVAL; | |
1235 | attrs &= ~(1 << OVS_KEY_ATTR_ARP); | |
1236 | ||
1237 | key_len = SW_FLOW_KEY_OFFSET(ipv4.arp); | |
1238 | arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); | |
1239 | swkey->ipv4.addr.src = arp_key->arp_sip; | |
1240 | swkey->ipv4.addr.dst = arp_key->arp_tip; | |
1241 | if (arp_key->arp_op & htons(0xff00)) | |
1242 | return -EINVAL; | |
1243 | swkey->ip.proto = ntohs(arp_key->arp_op); | |
1244 | memcpy(swkey->ipv4.arp.sha, arp_key->arp_sha, ETH_ALEN); | |
1245 | memcpy(swkey->ipv4.arp.tha, arp_key->arp_tha, ETH_ALEN); | |
1246 | } | |
1247 | ||
1248 | if (attrs) | |
1249 | return -EINVAL; | |
1250 | *key_lenp = key_len; | |
1251 | ||
1252 | return 0; | |
1253 | } | |
1254 | ||
1255 | /** | |
1256 | * ovs_flow_metadata_from_nlattrs - parses Netlink attributes into a flow key. | |
93d8fd15 | 1257 | * @flow: Receives extracted in_port, priority, tun_key and skb_mark. |
a3e82996 | 1258 | * @key_len: Length of key in @flow. Used for calculating flow hash. |
93d8fd15 | 1259 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
ccb1352e JG |
1260 | * sequence. |
1261 | * | |
1262 | * This parses a series of Netlink attributes that form a flow key, which must | |
1263 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to | |
1264 | * get the metadata, that is, the parts of the flow key that cannot be | |
1265 | * extracted from the packet itself. | |
1266 | */ | |
a3e82996 | 1267 | int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow, int key_len, |
93d8fd15 | 1268 | const struct nlattr *attr) |
ccb1352e | 1269 | { |
7d5437c7 | 1270 | struct ovs_key_ipv4_tunnel *tun_key = &flow->key.tun_key; |
ccb1352e JG |
1271 | const struct nlattr *nla; |
1272 | int rem; | |
1273 | ||
93d8fd15 PS |
1274 | flow->key.phy.in_port = DP_MAX_PORTS; |
1275 | flow->key.phy.priority = 0; | |
1276 | flow->key.phy.skb_mark = 0; | |
7d5437c7 | 1277 | memset(tun_key, 0, sizeof(flow->key.tun_key)); |
ccb1352e JG |
1278 | |
1279 | nla_for_each_nested(nla, attr, rem) { | |
1280 | int type = nla_type(nla); | |
1281 | ||
1282 | if (type <= OVS_KEY_ATTR_MAX && ovs_key_lens[type] > 0) { | |
7d5437c7 PS |
1283 | int err; |
1284 | ||
ccb1352e JG |
1285 | if (nla_len(nla) != ovs_key_lens[type]) |
1286 | return -EINVAL; | |
1287 | ||
1288 | switch (type) { | |
1289 | case OVS_KEY_ATTR_PRIORITY: | |
93d8fd15 | 1290 | flow->key.phy.priority = nla_get_u32(nla); |
ccb1352e JG |
1291 | break; |
1292 | ||
7d5437c7 PS |
1293 | case OVS_KEY_ATTR_TUNNEL: |
1294 | err = ovs_ipv4_tun_from_nlattr(nla, tun_key); | |
1295 | if (err) | |
1296 | return err; | |
1297 | break; | |
1298 | ||
ccb1352e JG |
1299 | case OVS_KEY_ATTR_IN_PORT: |
1300 | if (nla_get_u32(nla) >= DP_MAX_PORTS) | |
1301 | return -EINVAL; | |
93d8fd15 | 1302 | flow->key.phy.in_port = nla_get_u32(nla); |
ccb1352e | 1303 | break; |
39c7caeb AA |
1304 | |
1305 | case OVS_KEY_ATTR_SKB_MARK: | |
93d8fd15 | 1306 | flow->key.phy.skb_mark = nla_get_u32(nla); |
39c7caeb | 1307 | break; |
ccb1352e JG |
1308 | } |
1309 | } | |
1310 | } | |
1311 | if (rem) | |
1312 | return -EINVAL; | |
a3e82996 PS |
1313 | |
1314 | flow->hash = ovs_flow_hash(&flow->key, | |
1315 | flow_key_start(&flow->key), key_len); | |
1316 | ||
ccb1352e JG |
1317 | return 0; |
1318 | } | |
1319 | ||
1320 | int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey, struct sk_buff *skb) | |
1321 | { | |
1322 | struct ovs_key_ethernet *eth_key; | |
1323 | struct nlattr *nla, *encap; | |
1324 | ||
028d6a67 DM |
1325 | if (swkey->phy.priority && |
1326 | nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, swkey->phy.priority)) | |
1327 | goto nla_put_failure; | |
ccb1352e | 1328 | |
7d5437c7 PS |
1329 | if (swkey->tun_key.ipv4_dst && |
1330 | ovs_ipv4_tun_to_nlattr(skb, &swkey->tun_key)) | |
1331 | goto nla_put_failure; | |
1332 | ||
15eac2a7 | 1333 | if (swkey->phy.in_port != DP_MAX_PORTS && |
028d6a67 DM |
1334 | nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, swkey->phy.in_port)) |
1335 | goto nla_put_failure; | |
ccb1352e | 1336 | |
39c7caeb AA |
1337 | if (swkey->phy.skb_mark && |
1338 | nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, swkey->phy.skb_mark)) | |
1339 | goto nla_put_failure; | |
1340 | ||
ccb1352e JG |
1341 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); |
1342 | if (!nla) | |
1343 | goto nla_put_failure; | |
1344 | eth_key = nla_data(nla); | |
1345 | memcpy(eth_key->eth_src, swkey->eth.src, ETH_ALEN); | |
1346 | memcpy(eth_key->eth_dst, swkey->eth.dst, ETH_ALEN); | |
1347 | ||
1348 | if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) { | |
028d6a67 DM |
1349 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, htons(ETH_P_8021Q)) || |
1350 | nla_put_be16(skb, OVS_KEY_ATTR_VLAN, swkey->eth.tci)) | |
1351 | goto nla_put_failure; | |
ccb1352e JG |
1352 | encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); |
1353 | if (!swkey->eth.tci) | |
1354 | goto unencap; | |
1355 | } else { | |
1356 | encap = NULL; | |
1357 | } | |
1358 | ||
1359 | if (swkey->eth.type == htons(ETH_P_802_2)) | |
1360 | goto unencap; | |
1361 | ||
028d6a67 DM |
1362 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, swkey->eth.type)) |
1363 | goto nla_put_failure; | |
ccb1352e JG |
1364 | |
1365 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
1366 | struct ovs_key_ipv4 *ipv4_key; | |
1367 | ||
1368 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); | |
1369 | if (!nla) | |
1370 | goto nla_put_failure; | |
1371 | ipv4_key = nla_data(nla); | |
1372 | ipv4_key->ipv4_src = swkey->ipv4.addr.src; | |
1373 | ipv4_key->ipv4_dst = swkey->ipv4.addr.dst; | |
1374 | ipv4_key->ipv4_proto = swkey->ip.proto; | |
1375 | ipv4_key->ipv4_tos = swkey->ip.tos; | |
1376 | ipv4_key->ipv4_ttl = swkey->ip.ttl; | |
1377 | ipv4_key->ipv4_frag = swkey->ip.frag; | |
1378 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1379 | struct ovs_key_ipv6 *ipv6_key; | |
1380 | ||
1381 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); | |
1382 | if (!nla) | |
1383 | goto nla_put_failure; | |
1384 | ipv6_key = nla_data(nla); | |
1385 | memcpy(ipv6_key->ipv6_src, &swkey->ipv6.addr.src, | |
1386 | sizeof(ipv6_key->ipv6_src)); | |
1387 | memcpy(ipv6_key->ipv6_dst, &swkey->ipv6.addr.dst, | |
1388 | sizeof(ipv6_key->ipv6_dst)); | |
1389 | ipv6_key->ipv6_label = swkey->ipv6.label; | |
1390 | ipv6_key->ipv6_proto = swkey->ip.proto; | |
1391 | ipv6_key->ipv6_tclass = swkey->ip.tos; | |
1392 | ipv6_key->ipv6_hlimit = swkey->ip.ttl; | |
1393 | ipv6_key->ipv6_frag = swkey->ip.frag; | |
c0618533 MM |
1394 | } else if (swkey->eth.type == htons(ETH_P_ARP) || |
1395 | swkey->eth.type == htons(ETH_P_RARP)) { | |
ccb1352e JG |
1396 | struct ovs_key_arp *arp_key; |
1397 | ||
1398 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); | |
1399 | if (!nla) | |
1400 | goto nla_put_failure; | |
1401 | arp_key = nla_data(nla); | |
1402 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); | |
1403 | arp_key->arp_sip = swkey->ipv4.addr.src; | |
1404 | arp_key->arp_tip = swkey->ipv4.addr.dst; | |
1405 | arp_key->arp_op = htons(swkey->ip.proto); | |
1406 | memcpy(arp_key->arp_sha, swkey->ipv4.arp.sha, ETH_ALEN); | |
1407 | memcpy(arp_key->arp_tha, swkey->ipv4.arp.tha, ETH_ALEN); | |
1408 | } | |
1409 | ||
1410 | if ((swkey->eth.type == htons(ETH_P_IP) || | |
1411 | swkey->eth.type == htons(ETH_P_IPV6)) && | |
1412 | swkey->ip.frag != OVS_FRAG_TYPE_LATER) { | |
1413 | ||
1414 | if (swkey->ip.proto == IPPROTO_TCP) { | |
1415 | struct ovs_key_tcp *tcp_key; | |
1416 | ||
1417 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); | |
1418 | if (!nla) | |
1419 | goto nla_put_failure; | |
1420 | tcp_key = nla_data(nla); | |
1421 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
1422 | tcp_key->tcp_src = swkey->ipv4.tp.src; | |
1423 | tcp_key->tcp_dst = swkey->ipv4.tp.dst; | |
1424 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1425 | tcp_key->tcp_src = swkey->ipv6.tp.src; | |
1426 | tcp_key->tcp_dst = swkey->ipv6.tp.dst; | |
1427 | } | |
1428 | } else if (swkey->ip.proto == IPPROTO_UDP) { | |
1429 | struct ovs_key_udp *udp_key; | |
1430 | ||
1431 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); | |
1432 | if (!nla) | |
1433 | goto nla_put_failure; | |
1434 | udp_key = nla_data(nla); | |
1435 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
1436 | udp_key->udp_src = swkey->ipv4.tp.src; | |
1437 | udp_key->udp_dst = swkey->ipv4.tp.dst; | |
1438 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1439 | udp_key->udp_src = swkey->ipv6.tp.src; | |
1440 | udp_key->udp_dst = swkey->ipv6.tp.dst; | |
1441 | } | |
1442 | } else if (swkey->eth.type == htons(ETH_P_IP) && | |
1443 | swkey->ip.proto == IPPROTO_ICMP) { | |
1444 | struct ovs_key_icmp *icmp_key; | |
1445 | ||
1446 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); | |
1447 | if (!nla) | |
1448 | goto nla_put_failure; | |
1449 | icmp_key = nla_data(nla); | |
1450 | icmp_key->icmp_type = ntohs(swkey->ipv4.tp.src); | |
1451 | icmp_key->icmp_code = ntohs(swkey->ipv4.tp.dst); | |
1452 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && | |
1453 | swkey->ip.proto == IPPROTO_ICMPV6) { | |
1454 | struct ovs_key_icmpv6 *icmpv6_key; | |
1455 | ||
1456 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, | |
1457 | sizeof(*icmpv6_key)); | |
1458 | if (!nla) | |
1459 | goto nla_put_failure; | |
1460 | icmpv6_key = nla_data(nla); | |
1461 | icmpv6_key->icmpv6_type = ntohs(swkey->ipv6.tp.src); | |
1462 | icmpv6_key->icmpv6_code = ntohs(swkey->ipv6.tp.dst); | |
1463 | ||
1464 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
1465 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
1466 | struct ovs_key_nd *nd_key; | |
1467 | ||
1468 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); | |
1469 | if (!nla) | |
1470 | goto nla_put_failure; | |
1471 | nd_key = nla_data(nla); | |
1472 | memcpy(nd_key->nd_target, &swkey->ipv6.nd.target, | |
1473 | sizeof(nd_key->nd_target)); | |
1474 | memcpy(nd_key->nd_sll, swkey->ipv6.nd.sll, ETH_ALEN); | |
1475 | memcpy(nd_key->nd_tll, swkey->ipv6.nd.tll, ETH_ALEN); | |
1476 | } | |
1477 | } | |
1478 | } | |
1479 | ||
1480 | unencap: | |
1481 | if (encap) | |
1482 | nla_nest_end(skb, encap); | |
1483 | ||
1484 | return 0; | |
1485 | ||
1486 | nla_put_failure: | |
1487 | return -EMSGSIZE; | |
1488 | } | |
1489 | ||
1490 | /* Initializes the flow module. | |
1491 | * Returns zero if successful or a negative error code. */ | |
1492 | int ovs_flow_init(void) | |
1493 | { | |
1494 | flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow), 0, | |
1495 | 0, NULL); | |
1496 | if (flow_cache == NULL) | |
1497 | return -ENOMEM; | |
1498 | ||
1499 | return 0; | |
1500 | } | |
1501 | ||
1502 | /* Uninitializes the flow module. */ | |
1503 | void ovs_flow_exit(void) | |
1504 | { | |
1505 | kmem_cache_destroy(flow_cache); | |
1506 | } |