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064af421 BP |
1 | /* |
2 | * Distributed under the terms of the GNU GPL version 2. | |
f632c8fc | 3 | * Copyright (c) 2007, 2008, 2009, 2010, 2011 Nicira Networks. |
a14bc59f BP |
4 | * |
5 | * Significant portions of this file may be copied from parts of the Linux | |
6 | * kernel, by Linus Torvalds and others. | |
064af421 BP |
7 | */ |
8 | ||
9 | #include "flow.h" | |
f5e86186 | 10 | #include "datapath.h" |
6455100f | 11 | #include <linux/uaccess.h> |
064af421 BP |
12 | #include <linux/netdevice.h> |
13 | #include <linux/etherdevice.h> | |
14 | #include <linux/if_ether.h> | |
15 | #include <linux/if_vlan.h> | |
16 | #include <net/llc_pdu.h> | |
17 | #include <linux/kernel.h> | |
8d5ebd83 | 18 | #include <linux/jhash.h> |
064af421 BP |
19 | #include <linux/jiffies.h> |
20 | #include <linux/llc.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/in.h> | |
23 | #include <linux/rcupdate.h> | |
a26ef517 | 24 | #include <linux/if_arp.h> |
064af421 BP |
25 | #include <linux/if_ether.h> |
26 | #include <linux/ip.h> | |
d31f1109 | 27 | #include <linux/ipv6.h> |
064af421 BP |
28 | #include <linux/tcp.h> |
29 | #include <linux/udp.h> | |
30 | #include <linux/icmp.h> | |
d31f1109 | 31 | #include <linux/icmpv6.h> |
3544358a | 32 | #include <linux/rculist.h> |
3c5f6de3 | 33 | #include <net/inet_ecn.h> |
064af421 | 34 | #include <net/ip.h> |
d31f1109 | 35 | #include <net/ipv6.h> |
685a51a5 | 36 | #include <net/ndisc.h> |
064af421 | 37 | |
6ce39213 JG |
38 | #include "vlan.h" |
39 | ||
33b38b63 | 40 | static struct kmem_cache *flow_cache; |
83e3e75b | 41 | static unsigned int hash_seed __read_mostly; |
064af421 | 42 | |
2db65bf7 JG |
43 | static int check_header(struct sk_buff *skb, int len) |
44 | { | |
45 | if (unlikely(skb->len < len)) | |
46 | return -EINVAL; | |
47 | if (unlikely(!pskb_may_pull(skb, len))) | |
48 | return -ENOMEM; | |
49 | return 0; | |
50 | } | |
51 | ||
6455100f | 52 | static bool arphdr_ok(struct sk_buff *skb) |
a26ef517 | 53 | { |
2db65bf7 JG |
54 | return pskb_may_pull(skb, skb_network_offset(skb) + |
55 | sizeof(struct arp_eth_header)); | |
a26ef517 JP |
56 | } |
57 | ||
6455100f | 58 | static int check_iphdr(struct sk_buff *skb) |
064af421 | 59 | { |
4c1ad233 BP |
60 | unsigned int nh_ofs = skb_network_offset(skb); |
61 | unsigned int ip_len; | |
2db65bf7 | 62 | int err; |
4c1ad233 | 63 | |
2db65bf7 JG |
64 | err = check_header(skb, nh_ofs + sizeof(struct iphdr)); |
65 | if (unlikely(err)) | |
66 | return err; | |
4c1ad233 BP |
67 | |
68 | ip_len = ip_hdrlen(skb); | |
2db65bf7 JG |
69 | if (unlikely(ip_len < sizeof(struct iphdr) || |
70 | skb->len < nh_ofs + ip_len)) | |
4c1ad233 BP |
71 | return -EINVAL; |
72 | ||
4c1ad233 BP |
73 | skb_set_transport_header(skb, nh_ofs + ip_len); |
74 | return 0; | |
064af421 BP |
75 | } |
76 | ||
6455100f | 77 | static bool tcphdr_ok(struct sk_buff *skb) |
064af421 BP |
78 | { |
79 | int th_ofs = skb_transport_offset(skb); | |
2db65bf7 JG |
80 | int tcp_len; |
81 | ||
82 | if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr)))) | |
83 | return false; | |
84 | ||
85 | tcp_len = tcp_hdrlen(skb); | |
86 | if (unlikely(tcp_len < sizeof(struct tcphdr) || | |
87 | skb->len < th_ofs + tcp_len)) | |
88 | return false; | |
89 | ||
90 | return true; | |
064af421 BP |
91 | } |
92 | ||
6455100f | 93 | static bool udphdr_ok(struct sk_buff *skb) |
064af421 | 94 | { |
2db65bf7 JG |
95 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
96 | sizeof(struct udphdr)); | |
064af421 BP |
97 | } |
98 | ||
6455100f | 99 | static bool icmphdr_ok(struct sk_buff *skb) |
064af421 | 100 | { |
2db65bf7 JG |
101 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
102 | sizeof(struct icmphdr)); | |
064af421 BP |
103 | } |
104 | ||
ec58547a JG |
105 | u64 flow_used_time(unsigned long flow_jiffies) |
106 | { | |
107 | struct timespec cur_ts; | |
108 | u64 cur_ms, idle_ms; | |
109 | ||
110 | ktime_get_ts(&cur_ts); | |
111 | idle_ms = jiffies_to_msecs(jiffies - flow_jiffies); | |
112 | cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC + | |
113 | cur_ts.tv_nsec / NSEC_PER_MSEC; | |
114 | ||
115 | return cur_ms - idle_ms; | |
116 | } | |
117 | ||
76abe283 | 118 | #define SW_FLOW_KEY_OFFSET(field) \ |
6455100f PS |
119 | (offsetof(struct sw_flow_key, field) + \ |
120 | FIELD_SIZEOF(struct sw_flow_key, field)) | |
76abe283 | 121 | |
7257b535 BP |
122 | /** |
123 | * skip_exthdr - skip any IPv6 extension headers | |
124 | * @skb: skbuff to parse | |
125 | * @start: offset of first extension header | |
126 | * @nexthdrp: Initially, points to the type of the extension header at @start. | |
127 | * This function updates it to point to the extension header at the final | |
128 | * offset. | |
129 | * @tos_frag: Points to the @tos_frag member in a &struct sw_flow_key. This | |
130 | * function sets an appropriate %OVS_FRAG_TYPE_* value. | |
131 | * | |
132 | * This is based on ipv6_skip_exthdr() but adds the updates to *@tos_frag. | |
133 | * | |
134 | * When there is more than one fragment header, this version reports whether | |
135 | * the final fragment header that it examines is a first fragment. | |
136 | * | |
137 | * Returns the final payload offset, or -1 on error. | |
138 | */ | |
139 | static int skip_exthdr(const struct sk_buff *skb, int start, u8 *nexthdrp, | |
140 | u8 *tos_frag) | |
141 | { | |
142 | u8 nexthdr = *nexthdrp; | |
143 | ||
144 | while (ipv6_ext_hdr(nexthdr)) { | |
145 | struct ipv6_opt_hdr _hdr, *hp; | |
146 | int hdrlen; | |
147 | ||
148 | if (nexthdr == NEXTHDR_NONE) | |
149 | return -1; | |
150 | hp = skb_header_pointer(skb, start, sizeof(_hdr), &_hdr); | |
151 | if (hp == NULL) | |
152 | return -1; | |
153 | if (nexthdr == NEXTHDR_FRAGMENT) { | |
154 | __be16 _frag_off, *fp; | |
155 | fp = skb_header_pointer(skb, | |
156 | start+offsetof(struct frag_hdr, | |
157 | frag_off), | |
158 | sizeof(_frag_off), | |
159 | &_frag_off); | |
160 | if (fp == NULL) | |
161 | return -1; | |
162 | ||
163 | *tos_frag &= ~OVS_FRAG_TYPE_MASK; | |
164 | if (ntohs(*fp) & ~0x7) { | |
165 | *tos_frag |= OVS_FRAG_TYPE_LATER; | |
166 | break; | |
167 | } | |
168 | *tos_frag |= OVS_FRAG_TYPE_FIRST; | |
169 | hdrlen = 8; | |
170 | } else if (nexthdr == NEXTHDR_AUTH) | |
171 | hdrlen = (hp->hdrlen+2)<<2; | |
172 | else | |
173 | hdrlen = ipv6_optlen(hp); | |
174 | ||
175 | nexthdr = hp->nexthdr; | |
176 | start += hdrlen; | |
177 | } | |
178 | ||
179 | *nexthdrp = nexthdr; | |
180 | return start; | |
181 | } | |
182 | ||
76abe283 AE |
183 | static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key, |
184 | int *key_lenp) | |
d31f1109 JP |
185 | { |
186 | unsigned int nh_ofs = skb_network_offset(skb); | |
187 | unsigned int nh_len; | |
188 | int payload_ofs; | |
d31f1109 JP |
189 | struct ipv6hdr *nh; |
190 | uint8_t nexthdr; | |
2db65bf7 | 191 | int err; |
d31f1109 | 192 | |
76abe283 AE |
193 | *key_lenp = SW_FLOW_KEY_OFFSET(ipv6.addr); |
194 | ||
2db65bf7 JG |
195 | err = check_header(skb, nh_ofs + sizeof(*nh)); |
196 | if (unlikely(err)) | |
197 | return err; | |
d31f1109 JP |
198 | |
199 | nh = ipv6_hdr(skb); | |
200 | nexthdr = nh->nexthdr; | |
201 | payload_ofs = (u8 *)(nh + 1) - skb->data; | |
d31f1109 | 202 | |
28bad473 | 203 | key->ip.proto = NEXTHDR_NONE; |
7257b535 | 204 | key->ip.tos_frag = ipv6_get_dsfield(nh) & ~INET_ECN_MASK; |
76abe283 AE |
205 | ipv6_addr_copy(&key->ipv6.addr.src, &nh->saddr); |
206 | ipv6_addr_copy(&key->ipv6.addr.dst, &nh->daddr); | |
d31f1109 | 207 | |
6455100f PS |
208 | payload_ofs = skip_exthdr(skb, payload_ofs, |
209 | &nexthdr, &key->ip.tos_frag); | |
bfef4717 | 210 | if (unlikely(payload_ofs < 0)) |
d31f1109 | 211 | return -EINVAL; |
bfef4717 | 212 | |
d31f1109 | 213 | nh_len = payload_ofs - nh_ofs; |
d31f1109 | 214 | skb_set_transport_header(skb, nh_ofs + nh_len); |
28bad473 | 215 | key->ip.proto = nexthdr; |
d31f1109 JP |
216 | return nh_len; |
217 | } | |
218 | ||
219 | static bool icmp6hdr_ok(struct sk_buff *skb) | |
220 | { | |
2db65bf7 JG |
221 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
222 | sizeof(struct icmp6hdr)); | |
d31f1109 | 223 | } |
ec58547a | 224 | |
064af421 BP |
225 | #define TCP_FLAGS_OFFSET 13 |
226 | #define TCP_FLAG_MASK 0x3f | |
227 | ||
064af421 BP |
228 | void flow_used(struct sw_flow *flow, struct sk_buff *skb) |
229 | { | |
064af421 BP |
230 | u8 tcp_flags = 0; |
231 | ||
76abe283 | 232 | if (flow->key.eth.type == htons(ETH_P_IP) && |
28bad473 | 233 | flow->key.ip.proto == IPPROTO_TCP) { |
abfec865 BP |
234 | u8 *tcp = (u8 *)tcp_hdr(skb); |
235 | tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK; | |
064af421 BP |
236 | } |
237 | ||
e9141eec | 238 | spin_lock(&flow->lock); |
6bfafa55 | 239 | flow->used = jiffies; |
064af421 BP |
240 | flow->packet_count++; |
241 | flow->byte_count += skb->len; | |
242 | flow->tcp_flags |= tcp_flags; | |
e9141eec | 243 | spin_unlock(&flow->lock); |
064af421 BP |
244 | } |
245 | ||
37a1300c | 246 | struct sw_flow_actions *flow_actions_alloc(const struct nlattr *actions) |
064af421 | 247 | { |
37a1300c | 248 | int actions_len = nla_len(actions); |
064af421 BP |
249 | struct sw_flow_actions *sfa; |
250 | ||
722d19c5 BP |
251 | /* At least DP_MAX_PORTS actions are required to be able to flood a |
252 | * packet to every port. Factor of 2 allows for setting VLAN tags, | |
253 | * etc. */ | |
cdee00fd | 254 | if (actions_len > 2 * DP_MAX_PORTS * nla_total_size(4)) |
064af421 BP |
255 | return ERR_PTR(-EINVAL); |
256 | ||
84c17d98 | 257 | sfa = kmalloc(sizeof(*sfa) + actions_len, GFP_KERNEL); |
064af421 BP |
258 | if (!sfa) |
259 | return ERR_PTR(-ENOMEM); | |
260 | ||
cdee00fd | 261 | sfa->actions_len = actions_len; |
37a1300c | 262 | memcpy(sfa->actions, nla_data(actions), actions_len); |
064af421 BP |
263 | return sfa; |
264 | } | |
265 | ||
560e8022 JG |
266 | struct sw_flow *flow_alloc(void) |
267 | { | |
268 | struct sw_flow *flow; | |
269 | ||
270 | flow = kmem_cache_alloc(flow_cache, GFP_KERNEL); | |
271 | if (!flow) | |
272 | return ERR_PTR(-ENOMEM); | |
273 | ||
274 | spin_lock_init(&flow->lock); | |
fb8c9347 | 275 | atomic_set(&flow->refcnt, 1); |
6f04e94a | 276 | flow->sf_acts = NULL; |
fb8c9347 | 277 | flow->dead = false; |
064af421 | 278 | |
560e8022 JG |
279 | return flow; |
280 | } | |
281 | ||
3544358a | 282 | static struct hlist_head __rcu *find_bucket(struct flow_table * table, u32 hash) |
8d5ebd83 | 283 | { |
3544358a PS |
284 | return flex_array_get(table->buckets, |
285 | (hash & (table->n_buckets - 1))); | |
286 | } | |
287 | ||
288 | static struct flex_array __rcu *alloc_buckets(unsigned int n_buckets) | |
289 | { | |
6455100f | 290 | struct flex_array __rcu *buckets; |
3544358a PS |
291 | int i, err; |
292 | ||
293 | buckets = flex_array_alloc(sizeof(struct hlist_head *), | |
294 | n_buckets, GFP_KERNEL); | |
295 | if (!buckets) | |
296 | return NULL; | |
297 | ||
298 | err = flex_array_prealloc(buckets, 0, n_buckets, GFP_KERNEL); | |
299 | if (err) { | |
300 | flex_array_free(buckets); | |
301 | return NULL; | |
302 | } | |
303 | ||
304 | for (i = 0; i < n_buckets; i++) | |
305 | INIT_HLIST_HEAD((struct hlist_head *) | |
306 | flex_array_get(buckets, i)); | |
307 | ||
308 | return buckets; | |
309 | } | |
310 | ||
6455100f | 311 | static void free_buckets(struct flex_array *buckets) |
3544358a PS |
312 | { |
313 | flex_array_free(buckets); | |
314 | } | |
315 | ||
316 | struct flow_table *flow_tbl_alloc(int new_size) | |
317 | { | |
318 | struct flow_table *table = kmalloc(sizeof(*table), GFP_KERNEL); | |
319 | ||
320 | if (!table) | |
321 | return NULL; | |
322 | ||
323 | table->buckets = alloc_buckets(new_size); | |
324 | ||
325 | if (!table->buckets) { | |
326 | kfree(table); | |
327 | return NULL; | |
328 | } | |
329 | table->n_buckets = new_size; | |
330 | table->count = 0; | |
331 | ||
332 | return table; | |
333 | } | |
fb8c9347 | 334 | |
3544358a PS |
335 | static void flow_free(struct sw_flow *flow) |
336 | { | |
fb8c9347 JG |
337 | flow->dead = true; |
338 | flow_put(flow); | |
8d5ebd83 JG |
339 | } |
340 | ||
3544358a PS |
341 | void flow_tbl_destroy(struct flow_table *table) |
342 | { | |
343 | int i; | |
344 | ||
345 | if (!table) | |
346 | return; | |
347 | ||
348 | for (i = 0; i < table->n_buckets; i++) { | |
349 | struct sw_flow *flow; | |
350 | struct hlist_head *head = flex_array_get(table->buckets, i); | |
351 | struct hlist_node *node, *n; | |
352 | ||
353 | hlist_for_each_entry_safe(flow, node, n, head, hash_node) { | |
354 | hlist_del_init_rcu(&flow->hash_node); | |
355 | flow_free(flow); | |
356 | } | |
357 | } | |
358 | ||
359 | free_buckets(table->buckets); | |
360 | kfree(table); | |
361 | } | |
362 | ||
363 | static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu) | |
364 | { | |
365 | struct flow_table *table = container_of(rcu, struct flow_table, rcu); | |
366 | ||
367 | flow_tbl_destroy(table); | |
368 | } | |
369 | ||
370 | void flow_tbl_deferred_destroy(struct flow_table *table) | |
371 | { | |
6455100f PS |
372 | if (!table) |
373 | return; | |
3544358a | 374 | |
6455100f | 375 | call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb); |
3544358a PS |
376 | } |
377 | ||
378 | struct sw_flow *flow_tbl_next(struct flow_table *table, u32 *bucket, u32 *last) | |
379 | { | |
380 | struct sw_flow *flow; | |
381 | struct hlist_head *head; | |
382 | struct hlist_node *n; | |
383 | int i; | |
384 | ||
385 | while (*bucket < table->n_buckets) { | |
386 | i = 0; | |
387 | head = flex_array_get(table->buckets, *bucket); | |
388 | hlist_for_each_entry_rcu(flow, n, head, hash_node) { | |
389 | if (i < *last) { | |
390 | i++; | |
391 | continue; | |
392 | } | |
393 | *last = i + 1; | |
394 | return flow; | |
395 | } | |
396 | (*bucket)++; | |
397 | *last = 0; | |
398 | } | |
399 | ||
400 | return NULL; | |
401 | } | |
402 | ||
403 | struct flow_table *flow_tbl_expand(struct flow_table *table) | |
404 | { | |
405 | struct flow_table *new_table; | |
406 | int n_buckets = table->n_buckets * 2; | |
407 | int i; | |
408 | ||
409 | new_table = flow_tbl_alloc(n_buckets); | |
410 | if (!new_table) | |
411 | return ERR_PTR(-ENOMEM); | |
412 | ||
413 | for (i = 0; i < table->n_buckets; i++) { | |
414 | struct sw_flow *flow; | |
415 | struct hlist_head *head; | |
416 | struct hlist_node *n, *pos; | |
417 | ||
418 | head = flex_array_get(table->buckets, i); | |
419 | ||
420 | hlist_for_each_entry_safe(flow, n, pos, head, hash_node) { | |
421 | hlist_del_init_rcu(&flow->hash_node); | |
422 | flow_tbl_insert(new_table, flow); | |
423 | } | |
424 | } | |
425 | ||
426 | return new_table; | |
427 | } | |
428 | ||
064af421 BP |
429 | /* RCU callback used by flow_deferred_free. */ |
430 | static void rcu_free_flow_callback(struct rcu_head *rcu) | |
431 | { | |
432 | struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu); | |
fb8c9347 JG |
433 | |
434 | flow->dead = true; | |
435 | flow_put(flow); | |
064af421 BP |
436 | } |
437 | ||
438 | /* Schedules 'flow' to be freed after the next RCU grace period. | |
439 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
440 | void flow_deferred_free(struct sw_flow *flow) | |
441 | { | |
442 | call_rcu(&flow->rcu, rcu_free_flow_callback); | |
443 | } | |
444 | ||
fb8c9347 JG |
445 | void flow_hold(struct sw_flow *flow) |
446 | { | |
447 | atomic_inc(&flow->refcnt); | |
448 | } | |
449 | ||
450 | void flow_put(struct sw_flow *flow) | |
451 | { | |
452 | if (unlikely(!flow)) | |
453 | return; | |
454 | ||
455 | if (atomic_dec_and_test(&flow->refcnt)) { | |
39872c70 | 456 | kfree((struct sf_flow_acts __force *)flow->sf_acts); |
fb8c9347 JG |
457 | kmem_cache_free(flow_cache, flow); |
458 | } | |
459 | } | |
460 | ||
064af421 BP |
461 | /* RCU callback used by flow_deferred_free_acts. */ |
462 | static void rcu_free_acts_callback(struct rcu_head *rcu) | |
463 | { | |
d295e8e9 | 464 | struct sw_flow_actions *sf_acts = container_of(rcu, |
064af421 BP |
465 | struct sw_flow_actions, rcu); |
466 | kfree(sf_acts); | |
467 | } | |
468 | ||
469 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. | |
470 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
471 | void flow_deferred_free_acts(struct sw_flow_actions *sf_acts) | |
472 | { | |
473 | call_rcu(&sf_acts->rcu, rcu_free_acts_callback); | |
474 | } | |
475 | ||
2db65bf7 | 476 | static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key) |
064af421 | 477 | { |
50f06e16 BP |
478 | struct qtag_prefix { |
479 | __be16 eth_type; /* ETH_P_8021Q */ | |
480 | __be16 tci; | |
481 | }; | |
482 | struct qtag_prefix *qp; | |
483 | ||
2db65bf7 JG |
484 | if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) + |
485 | sizeof(__be16)))) | |
486 | return -ENOMEM; | |
50f06e16 BP |
487 | |
488 | qp = (struct qtag_prefix *) skb->data; | |
76abe283 | 489 | key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT); |
50f06e16 | 490 | __skb_pull(skb, sizeof(struct qtag_prefix)); |
2db65bf7 JG |
491 | |
492 | return 0; | |
50f06e16 BP |
493 | } |
494 | ||
495 | static __be16 parse_ethertype(struct sk_buff *skb) | |
064af421 | 496 | { |
50f06e16 BP |
497 | struct llc_snap_hdr { |
498 | u8 dsap; /* Always 0xAA */ | |
499 | u8 ssap; /* Always 0xAA */ | |
500 | u8 ctrl; | |
501 | u8 oui[3]; | |
8dda8c9b | 502 | __be16 ethertype; |
50f06e16 BP |
503 | }; |
504 | struct llc_snap_hdr *llc; | |
505 | __be16 proto; | |
506 | ||
507 | proto = *(__be16 *) skb->data; | |
508 | __skb_pull(skb, sizeof(__be16)); | |
509 | ||
36956a7d | 510 | if (ntohs(proto) >= 1536) |
50f06e16 BP |
511 | return proto; |
512 | ||
2db65bf7 | 513 | if (skb->len < sizeof(struct llc_snap_hdr)) |
36956a7d | 514 | return htons(ETH_P_802_2); |
50f06e16 | 515 | |
2db65bf7 JG |
516 | if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr)))) |
517 | return htons(0); | |
518 | ||
50f06e16 BP |
519 | llc = (struct llc_snap_hdr *) skb->data; |
520 | if (llc->dsap != LLC_SAP_SNAP || | |
521 | llc->ssap != LLC_SAP_SNAP || | |
522 | (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0) | |
36956a7d | 523 | return htons(ETH_P_802_2); |
50f06e16 BP |
524 | |
525 | __skb_pull(skb, sizeof(struct llc_snap_hdr)); | |
526 | return llc->ethertype; | |
064af421 BP |
527 | } |
528 | ||
685a51a5 | 529 | static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key, |
76abe283 | 530 | int *key_lenp, int nh_len) |
685a51a5 | 531 | { |
685a51a5 | 532 | struct icmp6hdr *icmp = icmp6_hdr(skb); |
76abe283 AE |
533 | int error = 0; |
534 | int key_len; | |
685a51a5 JP |
535 | |
536 | /* The ICMPv6 type and code fields use the 16-bit transport port | |
bfef4717 JG |
537 | * fields, so we need to store them in 16-bit network byte order. |
538 | */ | |
76abe283 AE |
539 | key->ipv6.tp.src = htons(icmp->icmp6_type); |
540 | key->ipv6.tp.dst = htons(icmp->icmp6_code); | |
541 | key_len = SW_FLOW_KEY_OFFSET(ipv6.tp); | |
685a51a5 | 542 | |
bfef4717 JG |
543 | if (icmp->icmp6_code == 0 && |
544 | (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
545 | icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
e977ba19 | 546 | int icmp_len = skb->len - skb_transport_offset(skb); |
685a51a5 JP |
547 | struct nd_msg *nd; |
548 | int offset; | |
549 | ||
76abe283 AE |
550 | key_len = SW_FLOW_KEY_OFFSET(ipv6.nd); |
551 | ||
685a51a5 | 552 | /* In order to process neighbor discovery options, we need the |
bfef4717 JG |
553 | * entire packet. |
554 | */ | |
555 | if (unlikely(icmp_len < sizeof(*nd))) | |
76abe283 AE |
556 | goto out; |
557 | if (unlikely(skb_linearize(skb))) { | |
558 | error = -ENOMEM; | |
559 | goto out; | |
560 | } | |
685a51a5 JP |
561 | |
562 | nd = (struct nd_msg *)skb_transport_header(skb); | |
76abe283 AE |
563 | ipv6_addr_copy(&key->ipv6.nd.target, &nd->target); |
564 | key_len = SW_FLOW_KEY_OFFSET(ipv6.nd); | |
685a51a5 JP |
565 | |
566 | icmp_len -= sizeof(*nd); | |
567 | offset = 0; | |
568 | while (icmp_len >= 8) { | |
6455100f PS |
569 | struct nd_opt_hdr *nd_opt = |
570 | (struct nd_opt_hdr *)(nd->opt + offset); | |
685a51a5 JP |
571 | int opt_len = nd_opt->nd_opt_len * 8; |
572 | ||
bfef4717 | 573 | if (unlikely(!opt_len || opt_len > icmp_len)) |
685a51a5 JP |
574 | goto invalid; |
575 | ||
bfef4717 JG |
576 | /* Store the link layer address if the appropriate |
577 | * option is provided. It is considered an error if | |
578 | * the same link layer option is specified twice. | |
579 | */ | |
685a51a5 | 580 | if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR |
bfef4717 | 581 | && opt_len == 8) { |
76abe283 | 582 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll))) |
685a51a5 | 583 | goto invalid; |
76abe283 | 584 | memcpy(key->ipv6.nd.sll, |
bfef4717 | 585 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); |
685a51a5 | 586 | } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR |
bfef4717 | 587 | && opt_len == 8) { |
76abe283 | 588 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll))) |
685a51a5 | 589 | goto invalid; |
76abe283 | 590 | memcpy(key->ipv6.nd.tll, |
bfef4717 | 591 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); |
685a51a5 JP |
592 | } |
593 | ||
594 | icmp_len -= opt_len; | |
595 | offset += opt_len; | |
596 | } | |
597 | } | |
598 | ||
76abe283 | 599 | goto out; |
685a51a5 JP |
600 | |
601 | invalid: | |
76abe283 AE |
602 | memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target)); |
603 | memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll)); | |
604 | memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll)); | |
685a51a5 | 605 | |
76abe283 AE |
606 | out: |
607 | *key_lenp = key_len; | |
608 | return error; | |
685a51a5 JP |
609 | } |
610 | ||
a31e0e31 BP |
611 | /** |
612 | * flow_extract - extracts a flow key from an Ethernet frame. | |
613 | * @skb: sk_buff that contains the frame, with skb->data pointing to the | |
614 | * Ethernet header | |
615 | * @in_port: port number on which @skb was received. | |
616 | * @key: output flow key | |
76abe283 | 617 | * @key_lenp: length of output flow key |
a31e0e31 BP |
618 | * |
619 | * The caller must ensure that skb->len >= ETH_HLEN. | |
620 | * | |
4c1ad233 BP |
621 | * Returns 0 if successful, otherwise a negative errno value. |
622 | * | |
59a18f80 BP |
623 | * Initializes @skb header pointers as follows: |
624 | * | |
625 | * - skb->mac_header: the Ethernet header. | |
626 | * | |
627 | * - skb->network_header: just past the Ethernet header, or just past the | |
628 | * VLAN header, to the first byte of the Ethernet payload. | |
629 | * | |
d31f1109 JP |
630 | * - skb->transport_header: If key->dl_type is ETH_P_IP or ETH_P_IPV6 |
631 | * on output, then just past the IP header, if one is present and | |
632 | * of a correct length, otherwise the same as skb->network_header. | |
633 | * For other key->dl_type values it is left untouched. | |
a31e0e31 | 634 | */ |
36956a7d | 635 | int flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key, |
7257b535 | 636 | int *key_lenp) |
064af421 | 637 | { |
76abe283 AE |
638 | int error = 0; |
639 | int key_len = SW_FLOW_KEY_OFFSET(eth); | |
064af421 | 640 | struct ethhdr *eth; |
064af421 | 641 | |
84c17d98 | 642 | memset(key, 0, sizeof(*key)); |
abff858b PS |
643 | |
644 | key->phy.priority = skb->priority; | |
645 | key->phy.tun_id = OVS_CB(skb)->tun_id; | |
646 | key->phy.in_port = in_port; | |
064af421 | 647 | |
064af421 | 648 | skb_reset_mac_header(skb); |
064af421 | 649 | |
2db65bf7 JG |
650 | /* Link layer. We are guaranteed to have at least the 14 byte Ethernet |
651 | * header in the linear data area. | |
652 | */ | |
50f06e16 | 653 | eth = eth_hdr(skb); |
76abe283 AE |
654 | memcpy(key->eth.src, eth->h_source, ETH_ALEN); |
655 | memcpy(key->eth.dst, eth->h_dest, ETH_ALEN); | |
656 | ||
50f06e16 | 657 | __skb_pull(skb, 2 * ETH_ALEN); |
6ce39213 JG |
658 | |
659 | if (vlan_tx_tag_present(skb)) | |
76abe283 | 660 | key->eth.tci = htons(vlan_get_tci(skb)); |
6ce39213 | 661 | else if (eth->h_proto == htons(ETH_P_8021Q)) |
2db65bf7 JG |
662 | if (unlikely(parse_vlan(skb, key))) |
663 | return -ENOMEM; | |
6ce39213 | 664 | |
76abe283 AE |
665 | key->eth.type = parse_ethertype(skb); |
666 | if (unlikely(key->eth.type == htons(0))) | |
2db65bf7 JG |
667 | return -ENOMEM; |
668 | ||
50f06e16 | 669 | skb_reset_network_header(skb); |
2db65bf7 | 670 | __skb_push(skb, skb->data - skb_mac_header(skb)); |
064af421 BP |
671 | |
672 | /* Network layer. */ | |
76abe283 | 673 | if (key->eth.type == htons(ETH_P_IP)) { |
4c1ad233 | 674 | struct iphdr *nh; |
7257b535 | 675 | __be16 offset; |
76abe283 AE |
676 | |
677 | key_len = SW_FLOW_KEY_OFFSET(ipv4.addr); | |
4c1ad233 BP |
678 | |
679 | error = check_iphdr(skb); | |
680 | if (unlikely(error)) { | |
681 | if (error == -EINVAL) { | |
682 | skb->transport_header = skb->network_header; | |
76abe283 | 683 | error = 0; |
4c1ad233 | 684 | } |
76abe283 | 685 | goto out; |
4c1ad233 BP |
686 | } |
687 | ||
688 | nh = ip_hdr(skb); | |
76abe283 AE |
689 | key->ipv4.addr.src = nh->saddr; |
690 | key->ipv4.addr.dst = nh->daddr; | |
7257b535 | 691 | |
28bad473 | 692 | key->ip.proto = nh->protocol; |
7257b535 | 693 | key->ip.tos_frag = nh->tos & ~INET_ECN_MASK; |
064af421 | 694 | |
7257b535 BP |
695 | offset = nh->frag_off & htons(IP_OFFSET); |
696 | if (offset) { | |
697 | key->ip.tos_frag |= OVS_FRAG_TYPE_LATER; | |
698 | goto out; | |
699 | } | |
700 | if (nh->frag_off & htons(IP_MF) || | |
701 | skb_shinfo(skb)->gso_type & SKB_GSO_UDP) | |
702 | key->ip.tos_frag |= OVS_FRAG_TYPE_FIRST; | |
b7a31ec1 | 703 | |
7257b535 | 704 | /* Transport layer. */ |
28bad473 | 705 | if (key->ip.proto == IPPROTO_TCP) { |
5f4d087c | 706 | key_len = SW_FLOW_KEY_OFFSET(ipv4.tp); |
7257b535 | 707 | if (tcphdr_ok(skb)) { |
5f4d087c JG |
708 | struct tcphdr *tcp = tcp_hdr(skb); |
709 | key->ipv4.tp.src = tcp->source; | |
710 | key->ipv4.tp.dst = tcp->dest; | |
711 | } | |
28bad473 | 712 | } else if (key->ip.proto == IPPROTO_UDP) { |
5f4d087c | 713 | key_len = SW_FLOW_KEY_OFFSET(ipv4.tp); |
7257b535 | 714 | if (udphdr_ok(skb)) { |
5f4d087c JG |
715 | struct udphdr *udp = udp_hdr(skb); |
716 | key->ipv4.tp.src = udp->source; | |
717 | key->ipv4.tp.dst = udp->dest; | |
718 | } | |
28bad473 | 719 | } else if (key->ip.proto == IPPROTO_ICMP) { |
5f4d087c | 720 | key_len = SW_FLOW_KEY_OFFSET(ipv4.tp); |
7257b535 | 721 | if (icmphdr_ok(skb)) { |
5f4d087c JG |
722 | struct icmphdr *icmp = icmp_hdr(skb); |
723 | /* The ICMP type and code fields use the 16-bit | |
6455100f PS |
724 | * transport port fields, so we need to store |
725 | * them in 16-bit network byte order. */ | |
5f4d087c JG |
726 | key->ipv4.tp.src = htons(icmp->type); |
727 | key->ipv4.tp.dst = htons(icmp->code); | |
728 | } | |
729 | } | |
730 | ||
76abe283 | 731 | } else if (key->eth.type == htons(ETH_P_ARP) && arphdr_ok(skb)) { |
a26ef517 JP |
732 | struct arp_eth_header *arp; |
733 | ||
734 | arp = (struct arp_eth_header *)skb_network_header(skb); | |
735 | ||
f5e86186 | 736 | if (arp->ar_hrd == htons(ARPHRD_ETHER) |
de3f65ea JP |
737 | && arp->ar_pro == htons(ETH_P_IP) |
738 | && arp->ar_hln == ETH_ALEN | |
739 | && arp->ar_pln == 4) { | |
740 | ||
741 | /* We only match on the lower 8 bits of the opcode. */ | |
b7a31ec1 | 742 | if (ntohs(arp->ar_op) <= 0xff) |
28bad473 | 743 | key->ip.proto = ntohs(arp->ar_op); |
76abe283 | 744 | |
28bad473 JG |
745 | if (key->ip.proto == ARPOP_REQUEST |
746 | || key->ip.proto == ARPOP_REPLY) { | |
76abe283 AE |
747 | memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src)); |
748 | memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst)); | |
749 | memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN); | |
750 | memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN); | |
751 | key_len = SW_FLOW_KEY_OFFSET(ipv4.arp); | |
de3f65ea JP |
752 | } |
753 | } | |
76abe283 | 754 | } else if (key->eth.type == htons(ETH_P_IPV6)) { |
d31f1109 JP |
755 | int nh_len; /* IPv6 Header + Extensions */ |
756 | ||
76abe283 | 757 | nh_len = parse_ipv6hdr(skb, key, &key_len); |
d31f1109 | 758 | if (unlikely(nh_len < 0)) { |
76abe283 | 759 | if (nh_len == -EINVAL) |
d31f1109 | 760 | skb->transport_header = skb->network_header; |
76abe283 AE |
761 | else |
762 | error = nh_len; | |
763 | goto out; | |
d31f1109 JP |
764 | } |
765 | ||
7257b535 BP |
766 | if ((key->ip.tos_frag & OVS_FRAG_TYPE_MASK) == OVS_FRAG_TYPE_LATER) |
767 | goto out; | |
768 | if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) | |
769 | key->ip.tos_frag |= OVS_FRAG_TYPE_FIRST; | |
770 | ||
d31f1109 | 771 | /* Transport layer. */ |
28bad473 | 772 | if (key->ip.proto == NEXTHDR_TCP) { |
76abe283 | 773 | key_len = SW_FLOW_KEY_OFFSET(ipv6.tp); |
d31f1109 JP |
774 | if (tcphdr_ok(skb)) { |
775 | struct tcphdr *tcp = tcp_hdr(skb); | |
76abe283 AE |
776 | key->ipv6.tp.src = tcp->source; |
777 | key->ipv6.tp.dst = tcp->dest; | |
d31f1109 | 778 | } |
28bad473 | 779 | } else if (key->ip.proto == NEXTHDR_UDP) { |
76abe283 | 780 | key_len = SW_FLOW_KEY_OFFSET(ipv6.tp); |
d31f1109 JP |
781 | if (udphdr_ok(skb)) { |
782 | struct udphdr *udp = udp_hdr(skb); | |
76abe283 AE |
783 | key->ipv6.tp.src = udp->source; |
784 | key->ipv6.tp.dst = udp->dest; | |
d31f1109 | 785 | } |
28bad473 | 786 | } else if (key->ip.proto == NEXTHDR_ICMP) { |
76abe283 | 787 | key_len = SW_FLOW_KEY_OFFSET(ipv6.tp); |
d31f1109 | 788 | if (icmp6hdr_ok(skb)) { |
76abe283 | 789 | error = parse_icmpv6(skb, key, &key_len, nh_len); |
685a51a5 | 790 | if (error < 0) |
76abe283 | 791 | goto out; |
d31f1109 JP |
792 | } |
793 | } | |
064af421 | 794 | } |
76abe283 AE |
795 | |
796 | out: | |
797 | *key_lenp = key_len; | |
798 | return error; | |
064af421 BP |
799 | } |
800 | ||
76abe283 | 801 | u32 flow_hash(const struct sw_flow_key *key, int key_len) |
8d5ebd83 | 802 | { |
6455100f | 803 | return jhash2((u32 *)key, DIV_ROUND_UP(key_len, sizeof(u32)), hash_seed); |
8d5ebd83 JG |
804 | } |
805 | ||
6455100f | 806 | struct sw_flow *flow_tbl_lookup(struct flow_table *table, |
3544358a | 807 | struct sw_flow_key *key, int key_len) |
8d5ebd83 | 808 | { |
3544358a PS |
809 | struct sw_flow *flow; |
810 | struct hlist_node *n; | |
811 | struct hlist_head *head; | |
812 | u32 hash; | |
8d5ebd83 | 813 | |
3544358a PS |
814 | hash = flow_hash(key, key_len); |
815 | ||
816 | head = find_bucket(table, hash); | |
817 | hlist_for_each_entry_rcu(flow, n, head, hash_node) { | |
818 | ||
819 | if (flow->hash == hash && | |
820 | !memcmp(&flow->key, key, key_len)) { | |
821 | return flow; | |
822 | } | |
823 | } | |
824 | return NULL; | |
825 | } | |
826 | ||
827 | void flow_tbl_insert(struct flow_table *table, struct sw_flow *flow) | |
828 | { | |
829 | struct hlist_head *head; | |
830 | ||
831 | head = find_bucket(table, flow->hash); | |
832 | hlist_add_head_rcu(&flow->hash_node, head); | |
833 | table->count++; | |
834 | } | |
835 | ||
836 | void flow_tbl_remove(struct flow_table *table, struct sw_flow *flow) | |
837 | { | |
838 | if (!hlist_unhashed(&flow->hash_node)) { | |
839 | hlist_del_init_rcu(&flow->hash_node); | |
840 | table->count--; | |
841 | BUG_ON(table->count < 0); | |
842 | } | |
36956a7d BP |
843 | } |
844 | ||
7257b535 BP |
845 | static int parse_tos_frag(struct sw_flow_key *swkey, u8 tos, u8 frag) |
846 | { | |
847 | if (tos & INET_ECN_MASK || frag > OVS_FRAG_TYPE_MAX) | |
848 | return -EINVAL; | |
849 | ||
850 | swkey->ip.tos_frag = tos | frag; | |
851 | return 0; | |
852 | } | |
853 | ||
df2c07f4 | 854 | /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ |
4edb9ae9 | 855 | const u32 ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { |
abff858b | 856 | [OVS_KEY_ATTR_PRIORITY] = 4, |
df2c07f4 JP |
857 | [OVS_KEY_ATTR_TUN_ID] = 8, |
858 | [OVS_KEY_ATTR_IN_PORT] = 4, | |
859 | [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet), | |
860 | [OVS_KEY_ATTR_8021Q] = sizeof(struct ovs_key_8021q), | |
861 | [OVS_KEY_ATTR_ETHERTYPE] = 2, | |
862 | [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4), | |
863 | [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6), | |
864 | [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp), | |
865 | [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp), | |
866 | [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp), | |
867 | [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6), | |
868 | [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp), | |
869 | [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd), | |
80e5eed9 BP |
870 | }; |
871 | ||
36956a7d BP |
872 | /** |
873 | * flow_from_nlattrs - parses Netlink attributes into a flow key. | |
874 | * @swkey: receives the extracted flow key. | |
76abe283 | 875 | * @key_lenp: number of bytes used in @swkey. |
df2c07f4 | 876 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
d6569377 | 877 | * sequence. |
36956a7d BP |
878 | * |
879 | * This state machine accepts the following forms, with [] for optional | |
880 | * elements and | for alternatives: | |
881 | * | |
abff858b | 882 | * [priority] [tun_id] [in_port] ethernet [8021q] [ethertype \ |
685a51a5 | 883 | * [IPv4 [TCP|UDP|ICMP] | IPv6 [TCP|UDP|ICMPv6 [ND]] | ARP]] |
7257b535 BP |
884 | * |
885 | * except that IPv4 or IPv6 terminates the sequence if its @ipv4_frag or | |
886 | * @ipv6_frag member, respectively, equals %OVS_FRAG_TYPE_LATER. | |
36956a7d | 887 | */ |
76abe283 AE |
888 | int flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp, |
889 | const struct nlattr *attr) | |
36956a7d | 890 | { |
76abe283 | 891 | int error = 0; |
7257b535 | 892 | enum ovs_frag_type frag_type; |
36956a7d BP |
893 | const struct nlattr *nla; |
894 | u16 prev_type; | |
895 | int rem; | |
76abe283 | 896 | int key_len; |
36956a7d BP |
897 | |
898 | memset(swkey, 0, sizeof(*swkey)); | |
abff858b | 899 | swkey->phy.in_port = USHRT_MAX; |
76abe283 AE |
900 | swkey->eth.type = htons(ETH_P_802_2); |
901 | key_len = SW_FLOW_KEY_OFFSET(eth); | |
36956a7d | 902 | |
df2c07f4 | 903 | prev_type = OVS_KEY_ATTR_UNSPEC; |
d6569377 | 904 | nla_for_each_nested(nla, attr, rem) { |
df2c07f4 JP |
905 | const struct ovs_key_ethernet *eth_key; |
906 | const struct ovs_key_8021q *q_key; | |
907 | const struct ovs_key_ipv4 *ipv4_key; | |
908 | const struct ovs_key_ipv6 *ipv6_key; | |
909 | const struct ovs_key_tcp *tcp_key; | |
910 | const struct ovs_key_udp *udp_key; | |
911 | const struct ovs_key_icmp *icmp_key; | |
912 | const struct ovs_key_icmpv6 *icmpv6_key; | |
913 | const struct ovs_key_arp *arp_key; | |
914 | const struct ovs_key_nd *nd_key; | |
36956a7d | 915 | |
6455100f | 916 | int type = nla_type(nla); |
36956a7d | 917 | |
6455100f PS |
918 | if (type > OVS_KEY_ATTR_MAX || |
919 | nla_len(nla) != ovs_key_lens[type]) | |
4edb9ae9 | 920 | goto invalid; |
36956a7d BP |
921 | |
922 | #define TRANSITION(PREV_TYPE, TYPE) (((PREV_TYPE) << 16) | (TYPE)) | |
923 | switch (TRANSITION(prev_type, type)) { | |
abff858b PS |
924 | case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_PRIORITY): |
925 | swkey->phy.priority = nla_get_u32(nla); | |
926 | break; | |
927 | ||
df2c07f4 | 928 | case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_TUN_ID): |
abff858b PS |
929 | case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_TUN_ID): |
930 | swkey->phy.tun_id = nla_get_be64(nla); | |
36956a7d BP |
931 | break; |
932 | ||
df2c07f4 | 933 | case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_IN_PORT): |
abff858b | 934 | case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_IN_PORT): |
df2c07f4 | 935 | case TRANSITION(OVS_KEY_ATTR_TUN_ID, OVS_KEY_ATTR_IN_PORT): |
36956a7d | 936 | if (nla_get_u32(nla) >= DP_MAX_PORTS) |
76abe283 | 937 | goto invalid; |
abff858b | 938 | swkey->phy.in_port = nla_get_u32(nla); |
36956a7d BP |
939 | break; |
940 | ||
18886b60 | 941 | case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_ETHERNET): |
abff858b | 942 | case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_ETHERNET): |
18886b60 | 943 | case TRANSITION(OVS_KEY_ATTR_TUN_ID, OVS_KEY_ATTR_ETHERNET): |
df2c07f4 | 944 | case TRANSITION(OVS_KEY_ATTR_IN_PORT, OVS_KEY_ATTR_ETHERNET): |
36956a7d | 945 | eth_key = nla_data(nla); |
76abe283 AE |
946 | memcpy(swkey->eth.src, eth_key->eth_src, ETH_ALEN); |
947 | memcpy(swkey->eth.dst, eth_key->eth_dst, ETH_ALEN); | |
36956a7d BP |
948 | break; |
949 | ||
df2c07f4 | 950 | case TRANSITION(OVS_KEY_ATTR_ETHERNET, OVS_KEY_ATTR_8021Q): |
36956a7d BP |
951 | q_key = nla_data(nla); |
952 | /* Only standard 0x8100 VLANs currently supported. */ | |
953 | if (q_key->q_tpid != htons(ETH_P_8021Q)) | |
76abe283 | 954 | goto invalid; |
36956a7d | 955 | if (q_key->q_tci & htons(VLAN_TAG_PRESENT)) |
76abe283 AE |
956 | goto invalid; |
957 | swkey->eth.tci = q_key->q_tci | htons(VLAN_TAG_PRESENT); | |
36956a7d BP |
958 | break; |
959 | ||
df2c07f4 JP |
960 | case TRANSITION(OVS_KEY_ATTR_8021Q, OVS_KEY_ATTR_ETHERTYPE): |
961 | case TRANSITION(OVS_KEY_ATTR_ETHERNET, OVS_KEY_ATTR_ETHERTYPE): | |
76abe283 AE |
962 | swkey->eth.type = nla_get_be16(nla); |
963 | if (ntohs(swkey->eth.type) < 1536) | |
964 | goto invalid; | |
36956a7d BP |
965 | break; |
966 | ||
df2c07f4 | 967 | case TRANSITION(OVS_KEY_ATTR_ETHERTYPE, OVS_KEY_ATTR_IPV4): |
76abe283 AE |
968 | key_len = SW_FLOW_KEY_OFFSET(ipv4.addr); |
969 | if (swkey->eth.type != htons(ETH_P_IP)) | |
970 | goto invalid; | |
36956a7d | 971 | ipv4_key = nla_data(nla); |
28bad473 | 972 | swkey->ip.proto = ipv4_key->ipv4_proto; |
7257b535 BP |
973 | if (parse_tos_frag(swkey, ipv4_key->ipv4_tos, |
974 | ipv4_key->ipv4_frag)) | |
975 | goto invalid; | |
76abe283 AE |
976 | swkey->ipv4.addr.src = ipv4_key->ipv4_src; |
977 | swkey->ipv4.addr.dst = ipv4_key->ipv4_dst; | |
36956a7d BP |
978 | break; |
979 | ||
df2c07f4 | 980 | case TRANSITION(OVS_KEY_ATTR_ETHERTYPE, OVS_KEY_ATTR_IPV6): |
76abe283 AE |
981 | key_len = SW_FLOW_KEY_OFFSET(ipv6.addr); |
982 | if (swkey->eth.type != htons(ETH_P_IPV6)) | |
983 | goto invalid; | |
d31f1109 | 984 | ipv6_key = nla_data(nla); |
28bad473 | 985 | swkey->ip.proto = ipv6_key->ipv6_proto; |
7257b535 BP |
986 | if (parse_tos_frag(swkey, ipv6_key->ipv6_tos, |
987 | ipv6_key->ipv6_frag)) | |
988 | goto invalid; | |
76abe283 AE |
989 | memcpy(&swkey->ipv6.addr.src, ipv6_key->ipv6_src, |
990 | sizeof(swkey->ipv6.addr.src)); | |
991 | memcpy(&swkey->ipv6.addr.dst, ipv6_key->ipv6_dst, | |
992 | sizeof(swkey->ipv6.addr.dst)); | |
d31f1109 JP |
993 | break; |
994 | ||
df2c07f4 | 995 | case TRANSITION(OVS_KEY_ATTR_IPV4, OVS_KEY_ATTR_TCP): |
76abe283 | 996 | key_len = SW_FLOW_KEY_OFFSET(ipv4.tp); |
28bad473 | 997 | if (swkey->ip.proto != IPPROTO_TCP) |
76abe283 AE |
998 | goto invalid; |
999 | tcp_key = nla_data(nla); | |
1000 | swkey->ipv4.tp.src = tcp_key->tcp_src; | |
1001 | swkey->ipv4.tp.dst = tcp_key->tcp_dst; | |
1002 | break; | |
1003 | ||
df2c07f4 | 1004 | case TRANSITION(OVS_KEY_ATTR_IPV6, OVS_KEY_ATTR_TCP): |
76abe283 | 1005 | key_len = SW_FLOW_KEY_OFFSET(ipv6.tp); |
28bad473 | 1006 | if (swkey->ip.proto != IPPROTO_TCP) |
76abe283 | 1007 | goto invalid; |
36956a7d | 1008 | tcp_key = nla_data(nla); |
76abe283 AE |
1009 | swkey->ipv6.tp.src = tcp_key->tcp_src; |
1010 | swkey->ipv6.tp.dst = tcp_key->tcp_dst; | |
36956a7d BP |
1011 | break; |
1012 | ||
df2c07f4 | 1013 | case TRANSITION(OVS_KEY_ATTR_IPV4, OVS_KEY_ATTR_UDP): |
76abe283 | 1014 | key_len = SW_FLOW_KEY_OFFSET(ipv4.tp); |
28bad473 | 1015 | if (swkey->ip.proto != IPPROTO_UDP) |
76abe283 AE |
1016 | goto invalid; |
1017 | udp_key = nla_data(nla); | |
1018 | swkey->ipv4.tp.src = udp_key->udp_src; | |
1019 | swkey->ipv4.tp.dst = udp_key->udp_dst; | |
1020 | break; | |
1021 | ||
df2c07f4 | 1022 | case TRANSITION(OVS_KEY_ATTR_IPV6, OVS_KEY_ATTR_UDP): |
76abe283 | 1023 | key_len = SW_FLOW_KEY_OFFSET(ipv6.tp); |
28bad473 | 1024 | if (swkey->ip.proto != IPPROTO_UDP) |
76abe283 | 1025 | goto invalid; |
36956a7d | 1026 | udp_key = nla_data(nla); |
76abe283 AE |
1027 | swkey->ipv6.tp.src = udp_key->udp_src; |
1028 | swkey->ipv6.tp.dst = udp_key->udp_dst; | |
36956a7d BP |
1029 | break; |
1030 | ||
df2c07f4 | 1031 | case TRANSITION(OVS_KEY_ATTR_IPV4, OVS_KEY_ATTR_ICMP): |
76abe283 | 1032 | key_len = SW_FLOW_KEY_OFFSET(ipv4.tp); |
28bad473 | 1033 | if (swkey->ip.proto != IPPROTO_ICMP) |
76abe283 | 1034 | goto invalid; |
36956a7d | 1035 | icmp_key = nla_data(nla); |
76abe283 AE |
1036 | swkey->ipv4.tp.src = htons(icmp_key->icmp_type); |
1037 | swkey->ipv4.tp.dst = htons(icmp_key->icmp_code); | |
36956a7d BP |
1038 | break; |
1039 | ||
df2c07f4 | 1040 | case TRANSITION(OVS_KEY_ATTR_IPV6, OVS_KEY_ATTR_ICMPV6): |
76abe283 | 1041 | key_len = SW_FLOW_KEY_OFFSET(ipv6.tp); |
28bad473 | 1042 | if (swkey->ip.proto != IPPROTO_ICMPV6) |
76abe283 | 1043 | goto invalid; |
d31f1109 | 1044 | icmpv6_key = nla_data(nla); |
76abe283 AE |
1045 | swkey->ipv6.tp.src = htons(icmpv6_key->icmpv6_type); |
1046 | swkey->ipv6.tp.dst = htons(icmpv6_key->icmpv6_code); | |
d31f1109 JP |
1047 | break; |
1048 | ||
df2c07f4 | 1049 | case TRANSITION(OVS_KEY_ATTR_ETHERTYPE, OVS_KEY_ATTR_ARP): |
76abe283 AE |
1050 | key_len = SW_FLOW_KEY_OFFSET(ipv4.arp); |
1051 | if (swkey->eth.type != htons(ETH_P_ARP)) | |
1052 | goto invalid; | |
36956a7d | 1053 | arp_key = nla_data(nla); |
76abe283 AE |
1054 | swkey->ipv4.addr.src = arp_key->arp_sip; |
1055 | swkey->ipv4.addr.dst = arp_key->arp_tip; | |
36956a7d | 1056 | if (arp_key->arp_op & htons(0xff00)) |
76abe283 | 1057 | goto invalid; |
28bad473 | 1058 | swkey->ip.proto = ntohs(arp_key->arp_op); |
76abe283 AE |
1059 | memcpy(swkey->ipv4.arp.sha, arp_key->arp_sha, ETH_ALEN); |
1060 | memcpy(swkey->ipv4.arp.tha, arp_key->arp_tha, ETH_ALEN); | |
36956a7d BP |
1061 | break; |
1062 | ||
df2c07f4 | 1063 | case TRANSITION(OVS_KEY_ATTR_ICMPV6, OVS_KEY_ATTR_ND): |
76abe283 AE |
1064 | key_len = SW_FLOW_KEY_OFFSET(ipv6.nd); |
1065 | if (swkey->ipv6.tp.src != htons(NDISC_NEIGHBOUR_SOLICITATION) | |
1066 | && swkey->ipv6.tp.src != htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) | |
1067 | goto invalid; | |
685a51a5 | 1068 | nd_key = nla_data(nla); |
76abe283 AE |
1069 | memcpy(&swkey->ipv6.nd.target, nd_key->nd_target, |
1070 | sizeof(swkey->ipv6.nd.target)); | |
1071 | memcpy(swkey->ipv6.nd.sll, nd_key->nd_sll, ETH_ALEN); | |
1072 | memcpy(swkey->ipv6.nd.tll, nd_key->nd_tll, ETH_ALEN); | |
685a51a5 JP |
1073 | break; |
1074 | ||
36956a7d | 1075 | default: |
76abe283 | 1076 | goto invalid; |
36956a7d BP |
1077 | } |
1078 | ||
1079 | prev_type = type; | |
1080 | } | |
1081 | if (rem) | |
76abe283 | 1082 | goto invalid; |
36956a7d | 1083 | |
7257b535 | 1084 | frag_type = swkey->ip.tos_frag & OVS_FRAG_TYPE_MASK; |
36956a7d | 1085 | switch (prev_type) { |
df2c07f4 | 1086 | case OVS_KEY_ATTR_UNSPEC: |
76abe283 | 1087 | goto invalid; |
36956a7d | 1088 | |
abff858b | 1089 | case OVS_KEY_ATTR_PRIORITY: |
df2c07f4 JP |
1090 | case OVS_KEY_ATTR_TUN_ID: |
1091 | case OVS_KEY_ATTR_IN_PORT: | |
76abe283 | 1092 | goto invalid; |
36956a7d | 1093 | |
df2c07f4 JP |
1094 | case OVS_KEY_ATTR_ETHERNET: |
1095 | case OVS_KEY_ATTR_8021Q: | |
76abe283 | 1096 | goto ok; |
36956a7d | 1097 | |
df2c07f4 | 1098 | case OVS_KEY_ATTR_ETHERTYPE: |
76abe283 | 1099 | if (swkey->eth.type == htons(ETH_P_IP) || |
515c382d | 1100 | swkey->eth.type == htons(ETH_P_IPV6) || |
76abe283 AE |
1101 | swkey->eth.type == htons(ETH_P_ARP)) |
1102 | goto invalid; | |
1103 | goto ok; | |
36956a7d | 1104 | |
df2c07f4 | 1105 | case OVS_KEY_ATTR_IPV4: |
7257b535 BP |
1106 | if (frag_type == OVS_FRAG_TYPE_LATER) |
1107 | goto ok; | |
28bad473 JG |
1108 | if (swkey->ip.proto == IPPROTO_TCP || |
1109 | swkey->ip.proto == IPPROTO_UDP || | |
1110 | swkey->ip.proto == IPPROTO_ICMP) | |
76abe283 AE |
1111 | goto invalid; |
1112 | goto ok; | |
36956a7d | 1113 | |
df2c07f4 | 1114 | case OVS_KEY_ATTR_IPV6: |
7257b535 BP |
1115 | if (frag_type == OVS_FRAG_TYPE_LATER) |
1116 | goto ok; | |
28bad473 JG |
1117 | if (swkey->ip.proto == IPPROTO_TCP || |
1118 | swkey->ip.proto == IPPROTO_UDP || | |
1119 | swkey->ip.proto == IPPROTO_ICMPV6) | |
76abe283 AE |
1120 | goto invalid; |
1121 | goto ok; | |
d31f1109 | 1122 | |
df2c07f4 | 1123 | case OVS_KEY_ATTR_ICMPV6: |
76abe283 | 1124 | if (swkey->ipv6.tp.src == htons(NDISC_NEIGHBOUR_SOLICITATION) || |
7257b535 BP |
1125 | swkey->ipv6.tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT) || |
1126 | frag_type == OVS_FRAG_TYPE_LATER) | |
76abe283 AE |
1127 | goto invalid; |
1128 | goto ok; | |
685a51a5 | 1129 | |
df2c07f4 JP |
1130 | case OVS_KEY_ATTR_TCP: |
1131 | case OVS_KEY_ATTR_UDP: | |
1132 | case OVS_KEY_ATTR_ICMP: | |
df2c07f4 | 1133 | case OVS_KEY_ATTR_ND: |
7257b535 BP |
1134 | if (frag_type == OVS_FRAG_TYPE_LATER) |
1135 | goto invalid; | |
1136 | goto ok; | |
1137 | ||
1138 | case OVS_KEY_ATTR_ARP: | |
76abe283 AE |
1139 | goto ok; |
1140 | ||
1141 | default: | |
1142 | WARN_ON_ONCE(1); | |
36956a7d BP |
1143 | } |
1144 | ||
76abe283 AE |
1145 | invalid: |
1146 | error = -EINVAL; | |
1147 | ||
1148 | ok: | |
76abe283 AE |
1149 | *key_lenp = key_len; |
1150 | return error; | |
36956a7d BP |
1151 | } |
1152 | ||
80e5eed9 BP |
1153 | /** |
1154 | * flow_metadata_from_nlattrs - parses Netlink attributes into a flow key. | |
1155 | * @in_port: receives the extracted input port. | |
1156 | * @tun_id: receives the extracted tunnel ID. | |
df2c07f4 | 1157 | * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
80e5eed9 BP |
1158 | * sequence. |
1159 | * | |
1160 | * This parses a series of Netlink attributes that form a flow key, which must | |
1161 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to | |
1162 | * get the metadata, that is, the parts of the flow key that cannot be | |
1163 | * extracted from the packet itself. | |
1164 | */ | |
abff858b | 1165 | int flow_metadata_from_nlattrs(u32 *priority, u16 *in_port, __be64 *tun_id, |
80e5eed9 BP |
1166 | const struct nlattr *attr) |
1167 | { | |
1168 | const struct nlattr *nla; | |
1169 | u16 prev_type; | |
1170 | int rem; | |
1171 | ||
18886b60 | 1172 | *in_port = USHRT_MAX; |
80e5eed9 | 1173 | *tun_id = 0; |
abff858b | 1174 | *priority = 0; |
80e5eed9 | 1175 | |
df2c07f4 | 1176 | prev_type = OVS_KEY_ATTR_UNSPEC; |
80e5eed9 | 1177 | nla_for_each_nested(nla, attr, rem) { |
6455100f | 1178 | int type = nla_type(nla); |
80e5eed9 | 1179 | |
4edb9ae9 PS |
1180 | if (type > OVS_KEY_ATTR_MAX || nla_len(nla) != ovs_key_lens[type]) |
1181 | return -EINVAL; | |
80e5eed9 BP |
1182 | |
1183 | switch (TRANSITION(prev_type, type)) { | |
abff858b PS |
1184 | case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_PRIORITY): |
1185 | *priority = nla_get_u32(nla); | |
1186 | break; | |
1187 | ||
df2c07f4 | 1188 | case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_TUN_ID): |
abff858b | 1189 | case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_TUN_ID): |
80e5eed9 BP |
1190 | *tun_id = nla_get_be64(nla); |
1191 | break; | |
1192 | ||
df2c07f4 | 1193 | case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_IN_PORT): |
abff858b | 1194 | case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_IN_PORT): |
df2c07f4 | 1195 | case TRANSITION(OVS_KEY_ATTR_TUN_ID, OVS_KEY_ATTR_IN_PORT): |
80e5eed9 BP |
1196 | if (nla_get_u32(nla) >= DP_MAX_PORTS) |
1197 | return -EINVAL; | |
1198 | *in_port = nla_get_u32(nla); | |
1199 | break; | |
1200 | ||
1201 | default: | |
18886b60 | 1202 | return 0; |
80e5eed9 BP |
1203 | } |
1204 | ||
1205 | prev_type = type; | |
1206 | } | |
1207 | if (rem) | |
1208 | return -EINVAL; | |
80e5eed9 BP |
1209 | return 0; |
1210 | } | |
1211 | ||
d6569377 | 1212 | int flow_to_nlattrs(const struct sw_flow_key *swkey, struct sk_buff *skb) |
36956a7d | 1213 | { |
df2c07f4 | 1214 | struct ovs_key_ethernet *eth_key; |
d6569377 | 1215 | struct nlattr *nla; |
36956a7d | 1216 | |
abff858b PS |
1217 | if (swkey->phy.priority) |
1218 | NLA_PUT_U32(skb, OVS_KEY_ATTR_PRIORITY, swkey->phy.priority); | |
18c43631 | 1219 | |
abff858b PS |
1220 | if (swkey->phy.tun_id != cpu_to_be64(0)) |
1221 | NLA_PUT_BE64(skb, OVS_KEY_ATTR_TUN_ID, swkey->phy.tun_id); | |
36956a7d | 1222 | |
abff858b PS |
1223 | if (swkey->phy.in_port != USHRT_MAX) |
1224 | NLA_PUT_U32(skb, OVS_KEY_ATTR_IN_PORT, swkey->phy.in_port); | |
36956a7d | 1225 | |
df2c07f4 | 1226 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); |
d6569377 BP |
1227 | if (!nla) |
1228 | goto nla_put_failure; | |
1229 | eth_key = nla_data(nla); | |
76abe283 AE |
1230 | memcpy(eth_key->eth_src, swkey->eth.src, ETH_ALEN); |
1231 | memcpy(eth_key->eth_dst, swkey->eth.dst, ETH_ALEN); | |
36956a7d | 1232 | |
76abe283 | 1233 | if (swkey->eth.tci != htons(0)) { |
df2c07f4 | 1234 | struct ovs_key_8021q q_key; |
36956a7d | 1235 | |
d6569377 | 1236 | q_key.q_tpid = htons(ETH_P_8021Q); |
76abe283 | 1237 | q_key.q_tci = swkey->eth.tci & ~htons(VLAN_TAG_PRESENT); |
df2c07f4 | 1238 | NLA_PUT(skb, OVS_KEY_ATTR_8021Q, sizeof(q_key), &q_key); |
36956a7d BP |
1239 | } |
1240 | ||
76abe283 | 1241 | if (swkey->eth.type == htons(ETH_P_802_2)) |
d6569377 | 1242 | return 0; |
36956a7d | 1243 | |
df2c07f4 | 1244 | NLA_PUT_BE16(skb, OVS_KEY_ATTR_ETHERTYPE, swkey->eth.type); |
36956a7d | 1245 | |
76abe283 | 1246 | if (swkey->eth.type == htons(ETH_P_IP)) { |
df2c07f4 | 1247 | struct ovs_key_ipv4 *ipv4_key; |
36956a7d | 1248 | |
df2c07f4 | 1249 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); |
d6569377 BP |
1250 | if (!nla) |
1251 | goto nla_put_failure; | |
1252 | ipv4_key = nla_data(nla); | |
df2c07f4 | 1253 | memset(ipv4_key, 0, sizeof(struct ovs_key_ipv4)); |
76abe283 AE |
1254 | ipv4_key->ipv4_src = swkey->ipv4.addr.src; |
1255 | ipv4_key->ipv4_dst = swkey->ipv4.addr.dst; | |
28bad473 | 1256 | ipv4_key->ipv4_proto = swkey->ip.proto; |
7257b535 BP |
1257 | ipv4_key->ipv4_tos = swkey->ip.tos_frag & ~INET_ECN_MASK; |
1258 | ipv4_key->ipv4_frag = swkey->ip.tos_frag & OVS_FRAG_TYPE_MASK; | |
76abe283 | 1259 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
df2c07f4 | 1260 | struct ovs_key_ipv6 *ipv6_key; |
d31f1109 | 1261 | |
df2c07f4 | 1262 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); |
d31f1109 JP |
1263 | if (!nla) |
1264 | goto nla_put_failure; | |
1265 | ipv6_key = nla_data(nla); | |
df2c07f4 | 1266 | memset(ipv6_key, 0, sizeof(struct ovs_key_ipv6)); |
76abe283 | 1267 | memcpy(ipv6_key->ipv6_src, &swkey->ipv6.addr.src, |
d31f1109 | 1268 | sizeof(ipv6_key->ipv6_src)); |
76abe283 | 1269 | memcpy(ipv6_key->ipv6_dst, &swkey->ipv6.addr.dst, |
d31f1109 | 1270 | sizeof(ipv6_key->ipv6_dst)); |
28bad473 | 1271 | ipv6_key->ipv6_proto = swkey->ip.proto; |
7257b535 BP |
1272 | ipv6_key->ipv6_tos = swkey->ip.tos_frag & ~INET_ECN_MASK; |
1273 | ipv6_key->ipv6_frag = swkey->ip.tos_frag & OVS_FRAG_TYPE_MASK; | |
76abe283 | 1274 | } else if (swkey->eth.type == htons(ETH_P_ARP)) { |
df2c07f4 | 1275 | struct ovs_key_arp *arp_key; |
d31f1109 | 1276 | |
df2c07f4 | 1277 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); |
d31f1109 JP |
1278 | if (!nla) |
1279 | goto nla_put_failure; | |
1280 | arp_key = nla_data(nla); | |
df2c07f4 | 1281 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); |
76abe283 AE |
1282 | arp_key->arp_sip = swkey->ipv4.addr.src; |
1283 | arp_key->arp_tip = swkey->ipv4.addr.dst; | |
28bad473 | 1284 | arp_key->arp_op = htons(swkey->ip.proto); |
76abe283 AE |
1285 | memcpy(arp_key->arp_sha, swkey->ipv4.arp.sha, ETH_ALEN); |
1286 | memcpy(arp_key->arp_tha, swkey->ipv4.arp.tha, ETH_ALEN); | |
d31f1109 JP |
1287 | } |
1288 | ||
7257b535 BP |
1289 | if ((swkey->eth.type == htons(ETH_P_IP) || |
1290 | swkey->eth.type == htons(ETH_P_IPV6)) && | |
1291 | (swkey->ip.tos_frag & OVS_FRAG_TYPE_MASK) != OVS_FRAG_TYPE_LATER) { | |
36956a7d | 1292 | |
28bad473 | 1293 | if (swkey->ip.proto == IPPROTO_TCP) { |
df2c07f4 | 1294 | struct ovs_key_tcp *tcp_key; |
36956a7d | 1295 | |
df2c07f4 | 1296 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); |
d6569377 BP |
1297 | if (!nla) |
1298 | goto nla_put_failure; | |
1299 | tcp_key = nla_data(nla); | |
76abe283 AE |
1300 | if (swkey->eth.type == htons(ETH_P_IP)) { |
1301 | tcp_key->tcp_src = swkey->ipv4.tp.src; | |
1302 | tcp_key->tcp_dst = swkey->ipv4.tp.dst; | |
1303 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1304 | tcp_key->tcp_src = swkey->ipv6.tp.src; | |
1305 | tcp_key->tcp_dst = swkey->ipv6.tp.dst; | |
1306 | } | |
28bad473 | 1307 | } else if (swkey->ip.proto == IPPROTO_UDP) { |
df2c07f4 | 1308 | struct ovs_key_udp *udp_key; |
36956a7d | 1309 | |
df2c07f4 | 1310 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); |
d6569377 BP |
1311 | if (!nla) |
1312 | goto nla_put_failure; | |
1313 | udp_key = nla_data(nla); | |
76abe283 AE |
1314 | if (swkey->eth.type == htons(ETH_P_IP)) { |
1315 | udp_key->udp_src = swkey->ipv4.tp.src; | |
1316 | udp_key->udp_dst = swkey->ipv4.tp.dst; | |
1317 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1318 | udp_key->udp_src = swkey->ipv6.tp.src; | |
1319 | udp_key->udp_dst = swkey->ipv6.tp.dst; | |
1320 | } | |
1321 | } else if (swkey->eth.type == htons(ETH_P_IP) && | |
28bad473 | 1322 | swkey->ip.proto == IPPROTO_ICMP) { |
df2c07f4 | 1323 | struct ovs_key_icmp *icmp_key; |
36956a7d | 1324 | |
df2c07f4 | 1325 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); |
d6569377 BP |
1326 | if (!nla) |
1327 | goto nla_put_failure; | |
1328 | icmp_key = nla_data(nla); | |
76abe283 AE |
1329 | icmp_key->icmp_type = ntohs(swkey->ipv4.tp.src); |
1330 | icmp_key->icmp_code = ntohs(swkey->ipv4.tp.dst); | |
1331 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && | |
28bad473 | 1332 | swkey->ip.proto == IPPROTO_ICMPV6) { |
df2c07f4 | 1333 | struct ovs_key_icmpv6 *icmpv6_key; |
36956a7d | 1334 | |
df2c07f4 | 1335 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, |
bfef4717 | 1336 | sizeof(*icmpv6_key)); |
d31f1109 JP |
1337 | if (!nla) |
1338 | goto nla_put_failure; | |
1339 | icmpv6_key = nla_data(nla); | |
76abe283 AE |
1340 | icmpv6_key->icmpv6_type = ntohs(swkey->ipv6.tp.src); |
1341 | icmpv6_key->icmpv6_code = ntohs(swkey->ipv6.tp.dst); | |
685a51a5 | 1342 | |
bfef4717 JG |
1343 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || |
1344 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
df2c07f4 | 1345 | struct ovs_key_nd *nd_key; |
685a51a5 | 1346 | |
df2c07f4 | 1347 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); |
685a51a5 JP |
1348 | if (!nla) |
1349 | goto nla_put_failure; | |
1350 | nd_key = nla_data(nla); | |
76abe283 | 1351 | memcpy(nd_key->nd_target, &swkey->ipv6.nd.target, |
685a51a5 | 1352 | sizeof(nd_key->nd_target)); |
76abe283 AE |
1353 | memcpy(nd_key->nd_sll, swkey->ipv6.nd.sll, ETH_ALEN); |
1354 | memcpy(nd_key->nd_tll, swkey->ipv6.nd.tll, ETH_ALEN); | |
685a51a5 | 1355 | } |
d31f1109 | 1356 | } |
36956a7d BP |
1357 | } |
1358 | ||
d6569377 | 1359 | return 0; |
36956a7d | 1360 | |
d6569377 BP |
1361 | nla_put_failure: |
1362 | return -EMSGSIZE; | |
8d5ebd83 JG |
1363 | } |
1364 | ||
064af421 BP |
1365 | /* Initializes the flow module. |
1366 | * Returns zero if successful or a negative error code. */ | |
1367 | int flow_init(void) | |
1368 | { | |
1369 | flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow), 0, | |
1370 | 0, NULL); | |
1371 | if (flow_cache == NULL) | |
1372 | return -ENOMEM; | |
1373 | ||
84c17d98 | 1374 | get_random_bytes(&hash_seed, sizeof(hash_seed)); |
8d5ebd83 | 1375 | |
064af421 BP |
1376 | return 0; |
1377 | } | |
1378 | ||
1379 | /* Uninitializes the flow module. */ | |
1380 | void flow_exit(void) | |
1381 | { | |
1382 | kmem_cache_destroy(flow_cache); | |
1383 | } |