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Commit | Line | Data |
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064af421 | 1 | /* |
a1c564be | 2 | * Copyright (c) 2007-2013 Nicira, Inc. |
a14bc59f | 3 | * |
a9a29d22 JG |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
064af421 BP |
17 | */ |
18 | ||
19 | #include "flow.h" | |
f5e86186 | 20 | #include "datapath.h" |
6455100f | 21 | #include <linux/uaccess.h> |
064af421 BP |
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> | |
8d5ebd83 | 28 | #include <linux/jhash.h> |
064af421 BP |
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> | |
a26ef517 | 34 | #include <linux/if_arp.h> |
064af421 | 35 | #include <linux/ip.h> |
d31f1109 | 36 | #include <linux/ipv6.h> |
064af421 BP |
37 | #include <linux/tcp.h> |
38 | #include <linux/udp.h> | |
39 | #include <linux/icmp.h> | |
d31f1109 | 40 | #include <linux/icmpv6.h> |
3544358a | 41 | #include <linux/rculist.h> |
064af421 | 42 | #include <net/ip.h> |
d31f1109 | 43 | #include <net/ipv6.h> |
685a51a5 | 44 | #include <net/ndisc.h> |
064af421 | 45 | |
6ce39213 JG |
46 | #include "vlan.h" |
47 | ||
33b38b63 | 48 | static struct kmem_cache *flow_cache; |
064af421 | 49 | |
a1c564be AZ |
50 | static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask, |
51 | struct sw_flow_key_range *range, u8 val); | |
52 | ||
53 | static void update_range__(struct sw_flow_match *match, | |
54 | size_t offset, size_t size, bool is_mask) | |
55 | { | |
56 | struct sw_flow_key_range *range = NULL; | |
57 | size_t start = offset; | |
58 | size_t end = offset + size; | |
59 | ||
60 | if (!is_mask) | |
61 | range = &match->range; | |
62 | else if (match->mask) | |
63 | range = &match->mask->range; | |
64 | ||
65 | if (!range) | |
66 | return; | |
67 | ||
68 | if (range->start == range->end) { | |
69 | range->start = start; | |
70 | range->end = end; | |
71 | return; | |
72 | } | |
73 | ||
74 | if (range->start > start) | |
75 | range->start = start; | |
76 | ||
77 | if (range->end < end) | |
78 | range->end = end; | |
79 | } | |
80 | ||
81 | #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \ | |
82 | do { \ | |
83 | update_range__(match, offsetof(struct sw_flow_key, field), \ | |
84 | sizeof((match)->key->field), is_mask); \ | |
85 | if (is_mask && match->mask != NULL) { \ | |
86 | (match)->mask->key.field = value; \ | |
87 | } else { \ | |
88 | (match)->key->field = value; \ | |
89 | } \ | |
90 | } while (0) | |
91 | ||
92 | #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \ | |
93 | do { \ | |
94 | update_range__(match, offsetof(struct sw_flow_key, field), \ | |
95 | len, is_mask); \ | |
96 | if (is_mask && match->mask != NULL) { \ | |
97 | memcpy(&(match)->mask->key.field, value_p, len); \ | |
98 | } else { \ | |
99 | memcpy(&(match)->key->field, value_p, len); \ | |
100 | } \ | |
101 | } while (0) | |
102 | ||
103 | void ovs_match_init(struct sw_flow_match *match, | |
104 | struct sw_flow_key *key, | |
105 | struct sw_flow_mask *mask) | |
106 | { | |
107 | memset(match, 0, sizeof(*match)); | |
108 | match->key = key; | |
109 | match->mask = mask; | |
110 | ||
111 | memset(key, 0, sizeof(*key)); | |
112 | ||
113 | if (mask) { | |
114 | memset(&mask->key, 0, sizeof(mask->key)); | |
115 | mask->range.start = mask->range.end = 0; | |
116 | } | |
117 | } | |
118 | ||
119 | static bool ovs_match_validate(const struct sw_flow_match *match, | |
120 | u64 key_attrs, u64 mask_attrs) | |
121 | { | |
122 | u64 key_expected = 1ULL << OVS_KEY_ATTR_ETHERNET; | |
123 | u64 mask_allowed = key_attrs; /* At most allow all key attributes */ | |
124 | ||
125 | /* The following mask attributes allowed only if they | |
126 | * pass the validation tests. */ | |
127 | mask_allowed &= ~((1ULL << OVS_KEY_ATTR_IPV4) | |
128 | | (1ULL << OVS_KEY_ATTR_IPV6) | |
129 | | (1ULL << OVS_KEY_ATTR_TCP) | |
130 | | (1ULL << OVS_KEY_ATTR_UDP) | |
131 | | (1ULL << OVS_KEY_ATTR_ICMP) | |
132 | | (1ULL << OVS_KEY_ATTR_ICMPV6) | |
133 | | (1ULL << OVS_KEY_ATTR_ARP) | |
134 | | (1ULL << OVS_KEY_ATTR_ND)); | |
135 | ||
136 | if (match->key->eth.type == htons(ETH_P_802_2) && | |
137 | match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
138 | mask_allowed |= (1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
139 | ||
140 | /* Check key attributes. */ | |
141 | if (match->key->eth.type == htons(ETH_P_ARP) | |
142 | || match->key->eth.type == htons(ETH_P_RARP)) { | |
143 | key_expected |= 1ULL << OVS_KEY_ATTR_ARP; | |
144 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
145 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ARP; | |
146 | } | |
147 | ||
148 | if (match->key->eth.type == htons(ETH_P_IP)) { | |
149 | key_expected |= 1ULL << OVS_KEY_ATTR_IPV4; | |
150 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
151 | mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV4; | |
152 | ||
153 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
154 | if (match->key->ip.proto == IPPROTO_UDP) { | |
155 | key_expected |= 1ULL << OVS_KEY_ATTR_UDP; | |
156 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
157 | mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP; | |
158 | } | |
159 | ||
160 | if (match->key->ip.proto == IPPROTO_TCP) { | |
161 | key_expected |= 1ULL << OVS_KEY_ATTR_TCP; | |
162 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
163 | mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP; | |
164 | } | |
165 | ||
166 | if (match->key->ip.proto == IPPROTO_ICMP) { | |
167 | key_expected |= 1ULL << OVS_KEY_ATTR_ICMP; | |
168 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
169 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMP; | |
170 | } | |
171 | } | |
172 | } | |
173 | ||
174 | if (match->key->eth.type == htons(ETH_P_IPV6)) { | |
175 | key_expected |= 1ULL << OVS_KEY_ATTR_IPV6; | |
176 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
177 | mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV6; | |
178 | ||
179 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
180 | if (match->key->ip.proto == IPPROTO_UDP) { | |
181 | key_expected |= 1ULL << OVS_KEY_ATTR_UDP; | |
182 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
183 | mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP; | |
184 | } | |
185 | ||
186 | if (match->key->ip.proto == IPPROTO_TCP) { | |
187 | key_expected |= 1ULL << OVS_KEY_ATTR_TCP; | |
188 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
189 | mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP; | |
190 | } | |
191 | ||
192 | if (match->key->ip.proto == IPPROTO_ICMPV6) { | |
193 | key_expected |= 1ULL << OVS_KEY_ATTR_ICMPV6; | |
194 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
195 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMPV6; | |
196 | ||
197 | if (match->key->ipv6.tp.src == | |
198 | htons(NDISC_NEIGHBOUR_SOLICITATION) || | |
199 | match->key->ipv6.tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
200 | key_expected |= 1ULL << OVS_KEY_ATTR_ND; | |
201 | if (match->mask && (match->mask->key.ipv6.tp.src == htons(0xffff))) | |
202 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ND; | |
203 | } | |
204 | } | |
205 | } | |
206 | } | |
207 | ||
208 | if ((key_attrs & key_expected) != key_expected) | |
209 | /* Key attributes check failed. */ | |
210 | return false; | |
211 | ||
212 | if ((mask_attrs & mask_allowed) != mask_attrs) | |
213 | /* Mask attributes check failed. */ | |
214 | return false; | |
215 | ||
216 | return true; | |
217 | } | |
218 | ||
2db65bf7 JG |
219 | static int check_header(struct sk_buff *skb, int len) |
220 | { | |
221 | if (unlikely(skb->len < len)) | |
222 | return -EINVAL; | |
223 | if (unlikely(!pskb_may_pull(skb, len))) | |
224 | return -ENOMEM; | |
225 | return 0; | |
226 | } | |
227 | ||
6455100f | 228 | static bool arphdr_ok(struct sk_buff *skb) |
a26ef517 | 229 | { |
2db65bf7 JG |
230 | return pskb_may_pull(skb, skb_network_offset(skb) + |
231 | sizeof(struct arp_eth_header)); | |
a26ef517 JP |
232 | } |
233 | ||
6455100f | 234 | static int check_iphdr(struct sk_buff *skb) |
064af421 | 235 | { |
4c1ad233 BP |
236 | unsigned int nh_ofs = skb_network_offset(skb); |
237 | unsigned int ip_len; | |
2db65bf7 | 238 | int err; |
4c1ad233 | 239 | |
2db65bf7 JG |
240 | err = check_header(skb, nh_ofs + sizeof(struct iphdr)); |
241 | if (unlikely(err)) | |
242 | return err; | |
4c1ad233 BP |
243 | |
244 | ip_len = ip_hdrlen(skb); | |
2db65bf7 JG |
245 | if (unlikely(ip_len < sizeof(struct iphdr) || |
246 | skb->len < nh_ofs + ip_len)) | |
4c1ad233 BP |
247 | return -EINVAL; |
248 | ||
4c1ad233 BP |
249 | skb_set_transport_header(skb, nh_ofs + ip_len); |
250 | return 0; | |
064af421 BP |
251 | } |
252 | ||
6455100f | 253 | static bool tcphdr_ok(struct sk_buff *skb) |
064af421 BP |
254 | { |
255 | int th_ofs = skb_transport_offset(skb); | |
2db65bf7 JG |
256 | int tcp_len; |
257 | ||
258 | if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr)))) | |
259 | return false; | |
260 | ||
261 | tcp_len = tcp_hdrlen(skb); | |
262 | if (unlikely(tcp_len < sizeof(struct tcphdr) || | |
263 | skb->len < th_ofs + tcp_len)) | |
264 | return false; | |
265 | ||
266 | return true; | |
064af421 BP |
267 | } |
268 | ||
6455100f | 269 | static bool udphdr_ok(struct sk_buff *skb) |
064af421 | 270 | { |
2db65bf7 JG |
271 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
272 | sizeof(struct udphdr)); | |
064af421 BP |
273 | } |
274 | ||
6455100f | 275 | static bool icmphdr_ok(struct sk_buff *skb) |
064af421 | 276 | { |
2db65bf7 JG |
277 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
278 | sizeof(struct icmphdr)); | |
064af421 BP |
279 | } |
280 | ||
850b6b3b | 281 | u64 ovs_flow_used_time(unsigned long flow_jiffies) |
ec58547a JG |
282 | { |
283 | struct timespec cur_ts; | |
284 | u64 cur_ms, idle_ms; | |
285 | ||
286 | ktime_get_ts(&cur_ts); | |
287 | idle_ms = jiffies_to_msecs(jiffies - flow_jiffies); | |
288 | cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC + | |
289 | cur_ts.tv_nsec / NSEC_PER_MSEC; | |
290 | ||
291 | return cur_ms - idle_ms; | |
292 | } | |
293 | ||
a1c564be | 294 | static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key) |
d31f1109 JP |
295 | { |
296 | unsigned int nh_ofs = skb_network_offset(skb); | |
297 | unsigned int nh_len; | |
298 | int payload_ofs; | |
d31f1109 JP |
299 | struct ipv6hdr *nh; |
300 | uint8_t nexthdr; | |
0fd0d083 | 301 | __be16 frag_off; |
2db65bf7 | 302 | int err; |
d31f1109 | 303 | |
2db65bf7 JG |
304 | err = check_header(skb, nh_ofs + sizeof(*nh)); |
305 | if (unlikely(err)) | |
306 | return err; | |
d31f1109 JP |
307 | |
308 | nh = ipv6_hdr(skb); | |
309 | nexthdr = nh->nexthdr; | |
310 | payload_ofs = (u8 *)(nh + 1) - skb->data; | |
d31f1109 | 311 | |
28bad473 | 312 | key->ip.proto = NEXTHDR_NONE; |
530180fd | 313 | key->ip.tos = ipv6_get_dsfield(nh); |
a61680c6 | 314 | key->ip.ttl = nh->hop_limit; |
fa8223b7 | 315 | key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL); |
858d1026 JG |
316 | key->ipv6.addr.src = nh->saddr; |
317 | key->ipv6.addr.dst = nh->daddr; | |
d31f1109 | 318 | |
0fd0d083 | 319 | payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off); |
bfef4717 | 320 | if (unlikely(payload_ofs < 0)) |
d31f1109 | 321 | return -EINVAL; |
bfef4717 | 322 | |
0fd0d083 JG |
323 | if (frag_off) { |
324 | if (frag_off & htons(~0x7)) | |
325 | key->ip.frag = OVS_FRAG_TYPE_LATER; | |
326 | else | |
327 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
328 | } | |
329 | ||
d31f1109 | 330 | nh_len = payload_ofs - nh_ofs; |
d31f1109 | 331 | skb_set_transport_header(skb, nh_ofs + nh_len); |
28bad473 | 332 | key->ip.proto = nexthdr; |
d31f1109 JP |
333 | return nh_len; |
334 | } | |
335 | ||
336 | static bool icmp6hdr_ok(struct sk_buff *skb) | |
337 | { | |
2db65bf7 JG |
338 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
339 | sizeof(struct icmp6hdr)); | |
d31f1109 | 340 | } |
ec58547a | 341 | |
a1c564be AZ |
342 | static void flow_key_mask(struct sw_flow_key *dst, |
343 | const struct sw_flow_key *src, | |
344 | const struct sw_flow_mask *mask) | |
345 | { | |
346 | u8 *m = (u8 *)&mask->key + mask->range.start; | |
347 | u8 *s = (u8 *)src + mask->range.start; | |
348 | u8 *d = (u8 *)dst + mask->range.start; | |
349 | int i; | |
350 | ||
351 | memset(dst, 0, sizeof(*dst)); | |
352 | for (i = 0; i < ovs_sw_flow_mask_size_roundup(mask); i++) { | |
353 | *d = *s & *m; | |
354 | d++, s++, m++; | |
355 | } | |
356 | } | |
357 | ||
064af421 BP |
358 | #define TCP_FLAGS_OFFSET 13 |
359 | #define TCP_FLAG_MASK 0x3f | |
360 | ||
850b6b3b | 361 | void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb) |
064af421 | 362 | { |
064af421 BP |
363 | u8 tcp_flags = 0; |
364 | ||
11460e23 JG |
365 | if ((flow->key.eth.type == htons(ETH_P_IP) || |
366 | flow->key.eth.type == htons(ETH_P_IPV6)) && | |
9c47b45a JG |
367 | flow->key.ip.proto == IPPROTO_TCP && |
368 | likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) { | |
abfec865 BP |
369 | u8 *tcp = (u8 *)tcp_hdr(skb); |
370 | tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK; | |
064af421 BP |
371 | } |
372 | ||
e9141eec | 373 | spin_lock(&flow->lock); |
6bfafa55 | 374 | flow->used = jiffies; |
064af421 BP |
375 | flow->packet_count++; |
376 | flow->byte_count += skb->len; | |
377 | flow->tcp_flags |= tcp_flags; | |
e9141eec | 378 | spin_unlock(&flow->lock); |
064af421 BP |
379 | } |
380 | ||
9b405f1a | 381 | struct sw_flow_actions *ovs_flow_actions_alloc(int size) |
064af421 BP |
382 | { |
383 | struct sw_flow_actions *sfa; | |
384 | ||
9b405f1a | 385 | if (size > MAX_ACTIONS_BUFSIZE) |
064af421 BP |
386 | return ERR_PTR(-EINVAL); |
387 | ||
ba400435 | 388 | sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); |
064af421 BP |
389 | if (!sfa) |
390 | return ERR_PTR(-ENOMEM); | |
391 | ||
9b405f1a | 392 | sfa->actions_len = 0; |
064af421 BP |
393 | return sfa; |
394 | } | |
395 | ||
850b6b3b | 396 | struct sw_flow *ovs_flow_alloc(void) |
560e8022 JG |
397 | { |
398 | struct sw_flow *flow; | |
399 | ||
400 | flow = kmem_cache_alloc(flow_cache, GFP_KERNEL); | |
401 | if (!flow) | |
402 | return ERR_PTR(-ENOMEM); | |
403 | ||
404 | spin_lock_init(&flow->lock); | |
6f04e94a | 405 | flow->sf_acts = NULL; |
a1c564be | 406 | flow->mask = NULL; |
064af421 | 407 | |
560e8022 JG |
408 | return flow; |
409 | } | |
410 | ||
be2ba156 | 411 | static struct hlist_head *find_bucket(struct flow_table *table, u32 hash) |
8d5ebd83 | 412 | { |
acd051f1 | 413 | hash = jhash_1word(hash, table->hash_seed); |
3544358a PS |
414 | return flex_array_get(table->buckets, |
415 | (hash & (table->n_buckets - 1))); | |
416 | } | |
417 | ||
be2ba156 | 418 | static struct flex_array *alloc_buckets(unsigned int n_buckets) |
3544358a | 419 | { |
be2ba156 | 420 | struct flex_array *buckets; |
3544358a PS |
421 | int i, err; |
422 | ||
423 | buckets = flex_array_alloc(sizeof(struct hlist_head *), | |
424 | n_buckets, GFP_KERNEL); | |
425 | if (!buckets) | |
426 | return NULL; | |
427 | ||
428 | err = flex_array_prealloc(buckets, 0, n_buckets, GFP_KERNEL); | |
429 | if (err) { | |
430 | flex_array_free(buckets); | |
431 | return NULL; | |
432 | } | |
433 | ||
434 | for (i = 0; i < n_buckets; i++) | |
435 | INIT_HLIST_HEAD((struct hlist_head *) | |
436 | flex_array_get(buckets, i)); | |
437 | ||
438 | return buckets; | |
439 | } | |
440 | ||
6455100f | 441 | static void free_buckets(struct flex_array *buckets) |
3544358a PS |
442 | { |
443 | flex_array_free(buckets); | |
444 | } | |
445 | ||
850b6b3b | 446 | struct flow_table *ovs_flow_tbl_alloc(int new_size) |
3544358a PS |
447 | { |
448 | struct flow_table *table = kmalloc(sizeof(*table), GFP_KERNEL); | |
449 | ||
450 | if (!table) | |
451 | return NULL; | |
452 | ||
453 | table->buckets = alloc_buckets(new_size); | |
454 | ||
455 | if (!table->buckets) { | |
456 | kfree(table); | |
457 | return NULL; | |
458 | } | |
459 | table->n_buckets = new_size; | |
460 | table->count = 0; | |
acd051f1 PS |
461 | table->node_ver = 0; |
462 | table->keep_flows = false; | |
463 | get_random_bytes(&table->hash_seed, sizeof(u32)); | |
a1c564be | 464 | INIT_LIST_HEAD(&table->mask_list); |
3544358a PS |
465 | |
466 | return table; | |
467 | } | |
fb8c9347 | 468 | |
a1c564be | 469 | static void __flow_tbl_destroy(struct flow_table *table) |
3544358a PS |
470 | { |
471 | int i; | |
472 | ||
acd051f1 PS |
473 | if (table->keep_flows) |
474 | goto skip_flows; | |
475 | ||
3544358a PS |
476 | for (i = 0; i < table->n_buckets; i++) { |
477 | struct sw_flow *flow; | |
478 | struct hlist_head *head = flex_array_get(table->buckets, i); | |
f8dfbcb7 | 479 | struct hlist_node *n; |
acd051f1 | 480 | int ver = table->node_ver; |
3544358a | 481 | |
f8dfbcb7 | 482 | hlist_for_each_entry_safe(flow, n, head, hash_node[ver]) { |
acd051f1 | 483 | hlist_del_rcu(&flow->hash_node[ver]); |
a1c564be | 484 | ovs_flow_free(flow, false); |
3544358a PS |
485 | } |
486 | } | |
487 | ||
acd051f1 | 488 | skip_flows: |
3544358a PS |
489 | free_buckets(table->buckets); |
490 | kfree(table); | |
491 | } | |
492 | ||
493 | static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu) | |
494 | { | |
495 | struct flow_table *table = container_of(rcu, struct flow_table, rcu); | |
496 | ||
a1c564be | 497 | __flow_tbl_destroy(table); |
3544358a PS |
498 | } |
499 | ||
a1c564be | 500 | void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred) |
3544358a | 501 | { |
6455100f PS |
502 | if (!table) |
503 | return; | |
3544358a | 504 | |
a1c564be AZ |
505 | if (deferred) |
506 | call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb); | |
507 | else | |
508 | __flow_tbl_destroy(table); | |
3544358a PS |
509 | } |
510 | ||
a1c564be | 511 | struct sw_flow *ovs_flow_dump_next(struct flow_table *table, u32 *bucket, u32 *last) |
3544358a PS |
512 | { |
513 | struct sw_flow *flow; | |
514 | struct hlist_head *head; | |
acd051f1 | 515 | int ver; |
3544358a PS |
516 | int i; |
517 | ||
acd051f1 | 518 | ver = table->node_ver; |
3544358a PS |
519 | while (*bucket < table->n_buckets) { |
520 | i = 0; | |
521 | head = flex_array_get(table->buckets, *bucket); | |
f8dfbcb7 | 522 | hlist_for_each_entry_rcu(flow, head, hash_node[ver]) { |
3544358a PS |
523 | if (i < *last) { |
524 | i++; | |
525 | continue; | |
526 | } | |
527 | *last = i + 1; | |
528 | return flow; | |
529 | } | |
530 | (*bucket)++; | |
531 | *last = 0; | |
532 | } | |
533 | ||
534 | return NULL; | |
535 | } | |
536 | ||
a1c564be | 537 | static void __tbl_insert(struct flow_table *table, struct sw_flow *flow) |
13e24889 PS |
538 | { |
539 | struct hlist_head *head; | |
a1c564be | 540 | |
13e24889 PS |
541 | head = find_bucket(table, flow->hash); |
542 | hlist_add_head_rcu(&flow->hash_node[table->node_ver], head); | |
a1c564be | 543 | |
13e24889 PS |
544 | table->count++; |
545 | } | |
546 | ||
acd051f1 | 547 | static void flow_table_copy_flows(struct flow_table *old, struct flow_table *new) |
3544358a | 548 | { |
acd051f1 | 549 | int old_ver; |
3544358a PS |
550 | int i; |
551 | ||
acd051f1 PS |
552 | old_ver = old->node_ver; |
553 | new->node_ver = !old_ver; | |
3544358a | 554 | |
acd051f1 PS |
555 | /* Insert in new table. */ |
556 | for (i = 0; i < old->n_buckets; i++) { | |
3544358a PS |
557 | struct sw_flow *flow; |
558 | struct hlist_head *head; | |
3544358a | 559 | |
acd051f1 | 560 | head = flex_array_get(old->buckets, i); |
3544358a | 561 | |
f8dfbcb7 | 562 | hlist_for_each_entry(flow, head, hash_node[old_ver]) |
a1c564be | 563 | __tbl_insert(new, flow); |
3544358a | 564 | } |
a1c564be AZ |
565 | |
566 | new->mask_list = old->mask_list; | |
acd051f1 PS |
567 | old->keep_flows = true; |
568 | } | |
569 | ||
570 | static struct flow_table *__flow_tbl_rehash(struct flow_table *table, int n_buckets) | |
571 | { | |
572 | struct flow_table *new_table; | |
573 | ||
574 | new_table = ovs_flow_tbl_alloc(n_buckets); | |
575 | if (!new_table) | |
576 | return ERR_PTR(-ENOMEM); | |
577 | ||
578 | flow_table_copy_flows(table, new_table); | |
3544358a PS |
579 | |
580 | return new_table; | |
581 | } | |
582 | ||
acd051f1 PS |
583 | struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table) |
584 | { | |
585 | return __flow_tbl_rehash(table, table->n_buckets); | |
586 | } | |
587 | ||
588 | struct flow_table *ovs_flow_tbl_expand(struct flow_table *table) | |
589 | { | |
590 | return __flow_tbl_rehash(table, table->n_buckets * 2); | |
591 | } | |
592 | ||
a1c564be | 593 | static void __flow_free(struct sw_flow *flow) |
9321954a | 594 | { |
9321954a JG |
595 | kfree((struct sf_flow_acts __force *)flow->sf_acts); |
596 | kmem_cache_free(flow_cache, flow); | |
597 | } | |
598 | ||
064af421 BP |
599 | static void rcu_free_flow_callback(struct rcu_head *rcu) |
600 | { | |
601 | struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu); | |
fb8c9347 | 602 | |
a1c564be | 603 | __flow_free(flow); |
064af421 BP |
604 | } |
605 | ||
a1c564be | 606 | void ovs_flow_free(struct sw_flow *flow, bool deferred) |
064af421 | 607 | { |
a1c564be AZ |
608 | if (!flow) |
609 | return; | |
610 | ||
611 | ovs_sw_flow_mask_del_ref((struct sw_flow_mask __force *)flow->mask, | |
612 | deferred); | |
613 | ||
614 | if (deferred) | |
615 | call_rcu(&flow->rcu, rcu_free_flow_callback); | |
616 | else | |
617 | __flow_free(flow); | |
064af421 BP |
618 | } |
619 | ||
850b6b3b | 620 | /* RCU callback used by ovs_flow_deferred_free_acts. */ |
064af421 BP |
621 | static void rcu_free_acts_callback(struct rcu_head *rcu) |
622 | { | |
d295e8e9 | 623 | struct sw_flow_actions *sf_acts = container_of(rcu, |
064af421 | 624 | struct sw_flow_actions, rcu); |
ba400435 | 625 | kfree(sf_acts); |
064af421 BP |
626 | } |
627 | ||
628 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. | |
629 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
850b6b3b | 630 | void ovs_flow_deferred_free_acts(struct sw_flow_actions *sf_acts) |
064af421 BP |
631 | { |
632 | call_rcu(&sf_acts->rcu, rcu_free_acts_callback); | |
633 | } | |
634 | ||
2db65bf7 | 635 | static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key) |
064af421 | 636 | { |
50f06e16 BP |
637 | struct qtag_prefix { |
638 | __be16 eth_type; /* ETH_P_8021Q */ | |
639 | __be16 tci; | |
640 | }; | |
641 | struct qtag_prefix *qp; | |
642 | ||
8ddc056d BP |
643 | if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16))) |
644 | return 0; | |
645 | ||
2db65bf7 JG |
646 | if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) + |
647 | sizeof(__be16)))) | |
648 | return -ENOMEM; | |
50f06e16 BP |
649 | |
650 | qp = (struct qtag_prefix *) skb->data; | |
76abe283 | 651 | key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT); |
50f06e16 | 652 | __skb_pull(skb, sizeof(struct qtag_prefix)); |
2db65bf7 JG |
653 | |
654 | return 0; | |
50f06e16 BP |
655 | } |
656 | ||
657 | static __be16 parse_ethertype(struct sk_buff *skb) | |
064af421 | 658 | { |
50f06e16 BP |
659 | struct llc_snap_hdr { |
660 | u8 dsap; /* Always 0xAA */ | |
661 | u8 ssap; /* Always 0xAA */ | |
662 | u8 ctrl; | |
663 | u8 oui[3]; | |
8dda8c9b | 664 | __be16 ethertype; |
50f06e16 BP |
665 | }; |
666 | struct llc_snap_hdr *llc; | |
667 | __be16 proto; | |
668 | ||
669 | proto = *(__be16 *) skb->data; | |
670 | __skb_pull(skb, sizeof(__be16)); | |
671 | ||
7cd46155 | 672 | if (ntohs(proto) >= ETH_P_802_3_MIN) |
50f06e16 BP |
673 | return proto; |
674 | ||
2db65bf7 | 675 | if (skb->len < sizeof(struct llc_snap_hdr)) |
36956a7d | 676 | return htons(ETH_P_802_2); |
50f06e16 | 677 | |
2db65bf7 JG |
678 | if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr)))) |
679 | return htons(0); | |
680 | ||
50f06e16 BP |
681 | llc = (struct llc_snap_hdr *) skb->data; |
682 | if (llc->dsap != LLC_SAP_SNAP || | |
683 | llc->ssap != LLC_SAP_SNAP || | |
684 | (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0) | |
36956a7d | 685 | return htons(ETH_P_802_2); |
50f06e16 BP |
686 | |
687 | __skb_pull(skb, sizeof(struct llc_snap_hdr)); | |
9e69bc5f | 688 | |
7cd46155 | 689 | if (ntohs(llc->ethertype) >= ETH_P_802_3_MIN) |
9e69bc5f RL |
690 | return llc->ethertype; |
691 | ||
692 | return htons(ETH_P_802_2); | |
064af421 BP |
693 | } |
694 | ||
685a51a5 | 695 | static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key, |
a1c564be | 696 | int nh_len) |
685a51a5 | 697 | { |
685a51a5 JP |
698 | struct icmp6hdr *icmp = icmp6_hdr(skb); |
699 | ||
700 | /* The ICMPv6 type and code fields use the 16-bit transport port | |
bfef4717 JG |
701 | * fields, so we need to store them in 16-bit network byte order. |
702 | */ | |
76abe283 AE |
703 | key->ipv6.tp.src = htons(icmp->icmp6_type); |
704 | key->ipv6.tp.dst = htons(icmp->icmp6_code); | |
685a51a5 | 705 | |
bfef4717 JG |
706 | if (icmp->icmp6_code == 0 && |
707 | (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
708 | icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
e977ba19 | 709 | int icmp_len = skb->len - skb_transport_offset(skb); |
685a51a5 JP |
710 | struct nd_msg *nd; |
711 | int offset; | |
712 | ||
713 | /* In order to process neighbor discovery options, we need the | |
bfef4717 JG |
714 | * entire packet. |
715 | */ | |
716 | if (unlikely(icmp_len < sizeof(*nd))) | |
a1c564be AZ |
717 | return 0; |
718 | ||
719 | if (unlikely(skb_linearize(skb))) | |
720 | return -ENOMEM; | |
685a51a5 JP |
721 | |
722 | nd = (struct nd_msg *)skb_transport_header(skb); | |
858d1026 | 723 | key->ipv6.nd.target = nd->target; |
685a51a5 JP |
724 | |
725 | icmp_len -= sizeof(*nd); | |
726 | offset = 0; | |
727 | while (icmp_len >= 8) { | |
6455100f PS |
728 | struct nd_opt_hdr *nd_opt = |
729 | (struct nd_opt_hdr *)(nd->opt + offset); | |
685a51a5 JP |
730 | int opt_len = nd_opt->nd_opt_len * 8; |
731 | ||
bfef4717 | 732 | if (unlikely(!opt_len || opt_len > icmp_len)) |
a1c564be | 733 | return 0; |
685a51a5 | 734 | |
bfef4717 JG |
735 | /* Store the link layer address if the appropriate |
736 | * option is provided. It is considered an error if | |
737 | * the same link layer option is specified twice. | |
738 | */ | |
685a51a5 | 739 | if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR |
bfef4717 | 740 | && opt_len == 8) { |
76abe283 | 741 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll))) |
685a51a5 | 742 | goto invalid; |
76abe283 | 743 | memcpy(key->ipv6.nd.sll, |
bfef4717 | 744 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); |
685a51a5 | 745 | } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR |
bfef4717 | 746 | && opt_len == 8) { |
76abe283 | 747 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll))) |
685a51a5 | 748 | goto invalid; |
76abe283 | 749 | memcpy(key->ipv6.nd.tll, |
bfef4717 | 750 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); |
685a51a5 JP |
751 | } |
752 | ||
753 | icmp_len -= opt_len; | |
754 | offset += opt_len; | |
755 | } | |
756 | } | |
757 | ||
a1c564be | 758 | return 0; |
685a51a5 JP |
759 | |
760 | invalid: | |
76abe283 AE |
761 | memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target)); |
762 | memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll)); | |
763 | memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll)); | |
685a51a5 | 764 | |
a1c564be | 765 | return 0; |
685a51a5 JP |
766 | } |
767 | ||
a31e0e31 | 768 | /** |
850b6b3b | 769 | * ovs_flow_extract - extracts a flow key from an Ethernet frame. |
a31e0e31 BP |
770 | * @skb: sk_buff that contains the frame, with skb->data pointing to the |
771 | * Ethernet header | |
772 | * @in_port: port number on which @skb was received. | |
773 | * @key: output flow key | |
76abe283 | 774 | * @key_lenp: length of output flow key |
a31e0e31 BP |
775 | * |
776 | * The caller must ensure that skb->len >= ETH_HLEN. | |
777 | * | |
4c1ad233 BP |
778 | * Returns 0 if successful, otherwise a negative errno value. |
779 | * | |
59a18f80 BP |
780 | * Initializes @skb header pointers as follows: |
781 | * | |
782 | * - skb->mac_header: the Ethernet header. | |
783 | * | |
784 | * - skb->network_header: just past the Ethernet header, or just past the | |
785 | * VLAN header, to the first byte of the Ethernet payload. | |
786 | * | |
ae9020cf | 787 | * - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6 |
d31f1109 JP |
788 | * on output, then just past the IP header, if one is present and |
789 | * of a correct length, otherwise the same as skb->network_header. | |
ae9020cf | 790 | * For other key->eth.type values it is left untouched. |
a31e0e31 | 791 | */ |
a1c564be | 792 | int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key) |
064af421 | 793 | { |
a1c564be | 794 | int error; |
064af421 | 795 | struct ethhdr *eth; |
064af421 | 796 | |
84c17d98 | 797 | memset(key, 0, sizeof(*key)); |
abff858b PS |
798 | |
799 | key->phy.priority = skb->priority; | |
356af50b | 800 | if (OVS_CB(skb)->tun_key) |
6694e498 | 801 | memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key)); |
abff858b | 802 | key->phy.in_port = in_port; |
72e8bf28 | 803 | key->phy.skb_mark = skb_get_mark(skb); |
064af421 | 804 | |
064af421 | 805 | skb_reset_mac_header(skb); |
064af421 | 806 | |
2db65bf7 JG |
807 | /* Link layer. We are guaranteed to have at least the 14 byte Ethernet |
808 | * header in the linear data area. | |
809 | */ | |
50f06e16 | 810 | eth = eth_hdr(skb); |
76abe283 AE |
811 | memcpy(key->eth.src, eth->h_source, ETH_ALEN); |
812 | memcpy(key->eth.dst, eth->h_dest, ETH_ALEN); | |
813 | ||
50f06e16 | 814 | __skb_pull(skb, 2 * ETH_ALEN); |
3cfede14 PS |
815 | /* We are going to push all headers that we pull, so no need to |
816 | * update skb->csum here. */ | |
6ce39213 JG |
817 | |
818 | if (vlan_tx_tag_present(skb)) | |
76abe283 | 819 | key->eth.tci = htons(vlan_get_tci(skb)); |
6ce39213 | 820 | else if (eth->h_proto == htons(ETH_P_8021Q)) |
2db65bf7 JG |
821 | if (unlikely(parse_vlan(skb, key))) |
822 | return -ENOMEM; | |
6ce39213 | 823 | |
76abe283 AE |
824 | key->eth.type = parse_ethertype(skb); |
825 | if (unlikely(key->eth.type == htons(0))) | |
2db65bf7 JG |
826 | return -ENOMEM; |
827 | ||
50f06e16 | 828 | skb_reset_network_header(skb); |
2db65bf7 | 829 | __skb_push(skb, skb->data - skb_mac_header(skb)); |
064af421 BP |
830 | |
831 | /* Network layer. */ | |
76abe283 | 832 | if (key->eth.type == htons(ETH_P_IP)) { |
4c1ad233 | 833 | struct iphdr *nh; |
7257b535 | 834 | __be16 offset; |
76abe283 | 835 | |
4c1ad233 BP |
836 | error = check_iphdr(skb); |
837 | if (unlikely(error)) { | |
838 | if (error == -EINVAL) { | |
839 | skb->transport_header = skb->network_header; | |
76abe283 | 840 | error = 0; |
4c1ad233 | 841 | } |
a1c564be | 842 | return error; |
4c1ad233 BP |
843 | } |
844 | ||
845 | nh = ip_hdr(skb); | |
76abe283 AE |
846 | key->ipv4.addr.src = nh->saddr; |
847 | key->ipv4.addr.dst = nh->daddr; | |
7257b535 | 848 | |
28bad473 | 849 | key->ip.proto = nh->protocol; |
530180fd | 850 | key->ip.tos = nh->tos; |
a61680c6 | 851 | key->ip.ttl = nh->ttl; |
064af421 | 852 | |
7257b535 BP |
853 | offset = nh->frag_off & htons(IP_OFFSET); |
854 | if (offset) { | |
9e44d715 | 855 | key->ip.frag = OVS_FRAG_TYPE_LATER; |
a1c564be | 856 | return 0; |
7257b535 BP |
857 | } |
858 | if (nh->frag_off & htons(IP_MF) || | |
859 | skb_shinfo(skb)->gso_type & SKB_GSO_UDP) | |
9e44d715 | 860 | key->ip.frag = OVS_FRAG_TYPE_FIRST; |
b7a31ec1 | 861 | |
7257b535 | 862 | /* Transport layer. */ |
28bad473 | 863 | if (key->ip.proto == IPPROTO_TCP) { |
7257b535 | 864 | if (tcphdr_ok(skb)) { |
5f4d087c JG |
865 | struct tcphdr *tcp = tcp_hdr(skb); |
866 | key->ipv4.tp.src = tcp->source; | |
867 | key->ipv4.tp.dst = tcp->dest; | |
868 | } | |
28bad473 | 869 | } else if (key->ip.proto == IPPROTO_UDP) { |
7257b535 | 870 | if (udphdr_ok(skb)) { |
5f4d087c JG |
871 | struct udphdr *udp = udp_hdr(skb); |
872 | key->ipv4.tp.src = udp->source; | |
873 | key->ipv4.tp.dst = udp->dest; | |
874 | } | |
28bad473 | 875 | } else if (key->ip.proto == IPPROTO_ICMP) { |
7257b535 | 876 | if (icmphdr_ok(skb)) { |
5f4d087c JG |
877 | struct icmphdr *icmp = icmp_hdr(skb); |
878 | /* The ICMP type and code fields use the 16-bit | |
6455100f PS |
879 | * transport port fields, so we need to store |
880 | * them in 16-bit network byte order. */ | |
5f4d087c JG |
881 | key->ipv4.tp.src = htons(icmp->type); |
882 | key->ipv4.tp.dst = htons(icmp->code); | |
883 | } | |
884 | } | |
885 | ||
8087f5ff MM |
886 | } else if ((key->eth.type == htons(ETH_P_ARP) || |
887 | key->eth.type == htons(ETH_P_RARP)) && arphdr_ok(skb)) { | |
a26ef517 JP |
888 | struct arp_eth_header *arp; |
889 | ||
890 | arp = (struct arp_eth_header *)skb_network_header(skb); | |
891 | ||
f5e86186 | 892 | if (arp->ar_hrd == htons(ARPHRD_ETHER) |
de3f65ea JP |
893 | && arp->ar_pro == htons(ETH_P_IP) |
894 | && arp->ar_hln == ETH_ALEN | |
895 | && arp->ar_pln == 4) { | |
896 | ||
897 | /* We only match on the lower 8 bits of the opcode. */ | |
b7a31ec1 | 898 | if (ntohs(arp->ar_op) <= 0xff) |
28bad473 | 899 | key->ip.proto = ntohs(arp->ar_op); |
a3d3ad0c MM |
900 | memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src)); |
901 | memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst)); | |
902 | memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN); | |
903 | memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN); | |
de3f65ea | 904 | } |
76abe283 | 905 | } else if (key->eth.type == htons(ETH_P_IPV6)) { |
d31f1109 JP |
906 | int nh_len; /* IPv6 Header + Extensions */ |
907 | ||
a1c564be | 908 | nh_len = parse_ipv6hdr(skb, key); |
d31f1109 | 909 | if (unlikely(nh_len < 0)) { |
a1c564be | 910 | if (nh_len == -EINVAL) { |
d31f1109 | 911 | skb->transport_header = skb->network_header; |
a1c564be AZ |
912 | error = 0; |
913 | } else { | |
76abe283 | 914 | error = nh_len; |
a1c564be AZ |
915 | } |
916 | return error; | |
d31f1109 JP |
917 | } |
918 | ||
9e44d715 | 919 | if (key->ip.frag == OVS_FRAG_TYPE_LATER) |
a1c564be | 920 | return 0; |
7257b535 | 921 | if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) |
9e44d715 | 922 | key->ip.frag = OVS_FRAG_TYPE_FIRST; |
7257b535 | 923 | |
d31f1109 | 924 | /* Transport layer. */ |
28bad473 | 925 | if (key->ip.proto == NEXTHDR_TCP) { |
d31f1109 JP |
926 | if (tcphdr_ok(skb)) { |
927 | struct tcphdr *tcp = tcp_hdr(skb); | |
76abe283 AE |
928 | key->ipv6.tp.src = tcp->source; |
929 | key->ipv6.tp.dst = tcp->dest; | |
d31f1109 | 930 | } |
28bad473 | 931 | } else if (key->ip.proto == NEXTHDR_UDP) { |
d31f1109 JP |
932 | if (udphdr_ok(skb)) { |
933 | struct udphdr *udp = udp_hdr(skb); | |
76abe283 AE |
934 | key->ipv6.tp.src = udp->source; |
935 | key->ipv6.tp.dst = udp->dest; | |
d31f1109 | 936 | } |
28bad473 | 937 | } else if (key->ip.proto == NEXTHDR_ICMP) { |
d31f1109 | 938 | if (icmp6hdr_ok(skb)) { |
a1c564be AZ |
939 | error = parse_icmpv6(skb, key, nh_len); |
940 | if (error) | |
941 | return error; | |
d31f1109 JP |
942 | } |
943 | } | |
064af421 | 944 | } |
76abe283 | 945 | |
a1c564be | 946 | return 0; |
064af421 BP |
947 | } |
948 | ||
13e24889 | 949 | static u32 ovs_flow_hash(const struct sw_flow_key *key, int key_start, int key_len) |
8d5ebd83 | 950 | { |
13e24889 PS |
951 | return jhash2((u32 *)((u8 *)key + key_start), |
952 | DIV_ROUND_UP(key_len - key_start, sizeof(u32)), 0); | |
953 | } | |
954 | ||
a1c564be | 955 | static int flow_key_start(const struct sw_flow_key *key) |
13e24889 | 956 | { |
6694e498 | 957 | if (key->tun_key.ipv4_dst) |
13e24889 PS |
958 | return 0; |
959 | else | |
6694e498 | 960 | return offsetof(struct sw_flow_key, phy); |
8d5ebd83 JG |
961 | } |
962 | ||
a1c564be AZ |
963 | static bool __cmp_key(const struct sw_flow_key *key1, |
964 | const struct sw_flow_key *key2, int key_start, int key_len) | |
965 | { | |
966 | return !memcmp((u8 *)key1 + key_start, | |
967 | (u8 *)key2 + key_start, (key_len - key_start)); | |
968 | } | |
969 | ||
970 | static bool __flow_cmp_key(const struct sw_flow *flow, | |
971 | const struct sw_flow_key *key, int key_start, int key_len) | |
972 | { | |
973 | return __cmp_key(&flow->key, key, key_start, key_len); | |
974 | } | |
975 | ||
976 | static bool __flow_cmp_unmasked_key(const struct sw_flow *flow, | |
977 | const struct sw_flow_key *key, int key_start, int key_len) | |
978 | { | |
979 | return __cmp_key(&flow->unmasked_key, key, key_start, key_len); | |
980 | } | |
981 | ||
982 | bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow, | |
983 | const struct sw_flow_key *key, int key_len) | |
984 | { | |
985 | int key_start; | |
986 | key_start = flow_key_start(key); | |
987 | ||
988 | return __flow_cmp_unmasked_key(flow, key, key_start, key_len); | |
989 | ||
990 | } | |
991 | ||
992 | struct sw_flow *ovs_flow_lookup_unmasked_key(struct flow_table *table, | |
993 | struct sw_flow_match *match) | |
994 | { | |
995 | struct sw_flow_key *unmasked = match->key; | |
996 | int key_len = match->range.end; | |
997 | struct sw_flow *flow; | |
998 | ||
999 | flow = ovs_flow_lookup(table, unmasked); | |
1000 | if (flow && (!ovs_flow_cmp_unmasked_key(flow, unmasked, key_len))) | |
1001 | flow = NULL; | |
1002 | ||
1003 | return flow; | |
1004 | } | |
1005 | ||
1006 | static struct sw_flow *ovs_masked_flow_lookup(struct flow_table *table, | |
1007 | const struct sw_flow_key *flow_key, | |
1008 | struct sw_flow_mask *mask) | |
8d5ebd83 | 1009 | { |
3544358a | 1010 | struct sw_flow *flow; |
3544358a | 1011 | struct hlist_head *head; |
a1c564be AZ |
1012 | int key_start = mask->range.start; |
1013 | int key_len = mask->range.end; | |
3544358a | 1014 | u32 hash; |
a1c564be | 1015 | struct sw_flow_key masked_key; |
8d5ebd83 | 1016 | |
a1c564be AZ |
1017 | flow_key_mask(&masked_key, flow_key, mask); |
1018 | hash = ovs_flow_hash(&masked_key, key_start, key_len); | |
3544358a | 1019 | head = find_bucket(table, hash); |
f8dfbcb7 | 1020 | hlist_for_each_entry_rcu(flow, head, hash_node[table->node_ver]) { |
a1c564be | 1021 | if (__flow_cmp_key(flow, &masked_key, key_start, key_len)) |
3544358a | 1022 | return flow; |
3544358a PS |
1023 | } |
1024 | return NULL; | |
1025 | } | |
1026 | ||
a1c564be AZ |
1027 | struct sw_flow *ovs_flow_lookup(struct flow_table *tbl, |
1028 | const struct sw_flow_key *key) | |
3544358a | 1029 | { |
a1c564be AZ |
1030 | struct sw_flow *flow = NULL; |
1031 | struct sw_flow_mask *mask; | |
1032 | ||
1033 | list_for_each_entry_rcu(mask, &tbl->mask_list, list) { | |
1034 | flow = ovs_masked_flow_lookup(tbl, key, mask); | |
1035 | if (flow) /* Found */ | |
1036 | break; | |
1037 | } | |
1038 | ||
1039 | return flow; | |
3544358a PS |
1040 | } |
1041 | ||
a1c564be AZ |
1042 | |
1043 | void ovs_flow_insert(struct flow_table *table, struct sw_flow *flow, | |
1044 | const struct sw_flow_key *key, int key_len) | |
1045 | { | |
1046 | flow->unmasked_key = *key; | |
1047 | flow_key_mask(&flow->key, &flow->unmasked_key, ovsl_dereference(flow->mask)); | |
1048 | flow->hash = ovs_flow_hash(&flow->key, | |
1049 | ovsl_dereference(flow->mask)->range.start, | |
1050 | ovsl_dereference(flow->mask)->range.end); | |
1051 | __tbl_insert(table, flow); | |
1052 | } | |
1053 | ||
1054 | void ovs_flow_remove(struct flow_table *table, struct sw_flow *flow) | |
3544358a | 1055 | { |
49c7f80c | 1056 | BUG_ON(table->count == 0); |
acd051f1 PS |
1057 | hlist_del_rcu(&flow->hash_node[table->node_ver]); |
1058 | table->count--; | |
36956a7d BP |
1059 | } |
1060 | ||
df2c07f4 | 1061 | /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ |
4094406f BP |
1062 | const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { |
1063 | [OVS_KEY_ATTR_ENCAP] = -1, | |
a1bf209f BP |
1064 | [OVS_KEY_ATTR_PRIORITY] = sizeof(u32), |
1065 | [OVS_KEY_ATTR_IN_PORT] = sizeof(u32), | |
72e8bf28 | 1066 | [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32), |
df2c07f4 | 1067 | [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet), |
fea393b1 | 1068 | [OVS_KEY_ATTR_VLAN] = sizeof(__be16), |
a1bf209f | 1069 | [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16), |
df2c07f4 JP |
1070 | [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4), |
1071 | [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6), | |
1072 | [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp), | |
1073 | [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp), | |
1074 | [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp), | |
1075 | [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6), | |
1076 | [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp), | |
1077 | [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd), | |
9b405f1a | 1078 | [OVS_KEY_ATTR_TUNNEL] = -1, |
80e5eed9 BP |
1079 | }; |
1080 | ||
a1c564be | 1081 | static bool is_all_zero(const u8 *fp, size_t size) |
34118cae | 1082 | { |
a1c564be | 1083 | int i; |
34118cae | 1084 | |
a1c564be AZ |
1085 | if (!fp) |
1086 | return false; | |
34118cae | 1087 | |
a1c564be AZ |
1088 | for (i = 0; i < size; i++) |
1089 | if (fp[i]) | |
1090 | return false; | |
34118cae | 1091 | |
a1c564be | 1092 | return true; |
34118cae BP |
1093 | } |
1094 | ||
a1c564be AZ |
1095 | static int __parse_flow_nlattrs(const struct nlattr *attr, |
1096 | const struct nlattr *a[], | |
1097 | u64 *attrsp, bool nz) | |
fea393b1 BP |
1098 | { |
1099 | const struct nlattr *nla; | |
1100 | u64 attrs; | |
1101 | int rem; | |
1102 | ||
a1c564be | 1103 | attrs = *attrsp; |
fea393b1 BP |
1104 | nla_for_each_nested(nla, attr, rem) { |
1105 | u16 type = nla_type(nla); | |
4094406f | 1106 | int expected_len; |
fea393b1 | 1107 | |
4094406f | 1108 | if (type > OVS_KEY_ATTR_MAX || attrs & (1ULL << type)) |
fea393b1 | 1109 | return -EINVAL; |
4094406f BP |
1110 | |
1111 | expected_len = ovs_key_lens[type]; | |
1112 | if (nla_len(nla) != expected_len && expected_len != -1) | |
1113 | return -EINVAL; | |
1114 | ||
a1c564be AZ |
1115 | if (attrs & (1ULL << type)) |
1116 | /* Duplicated field. */ | |
1117 | return -EINVAL; | |
1118 | ||
1119 | if (!nz || !is_all_zero(nla_data(nla), expected_len)) { | |
1120 | attrs |= 1ULL << type; | |
1121 | a[type] = nla; | |
1122 | } | |
fea393b1 BP |
1123 | } |
1124 | if (rem) | |
1125 | return -EINVAL; | |
1126 | ||
1127 | *attrsp = attrs; | |
1128 | return 0; | |
1129 | } | |
1130 | ||
a1c564be AZ |
1131 | static int parse_flow_mask_nlattrs(const struct nlattr *attr, |
1132 | const struct nlattr *a[], u64 *attrsp) | |
1133 | { | |
1134 | return __parse_flow_nlattrs(attr, a, attrsp, true); | |
1135 | } | |
1136 | ||
1137 | static int parse_flow_nlattrs(const struct nlattr *attr, | |
1138 | const struct nlattr *a[], u64 *attrsp) | |
1139 | { | |
1140 | return __parse_flow_nlattrs(attr, a, attrsp, false); | |
1141 | } | |
1142 | ||
9b405f1a | 1143 | int ipv4_tun_from_nlattr(const struct nlattr *attr, |
a1c564be | 1144 | struct sw_flow_match *match, bool is_mask) |
9b405f1a PS |
1145 | { |
1146 | struct nlattr *a; | |
1147 | int rem; | |
1148 | bool ttl = false; | |
5ebaf571 | 1149 | __be16 tun_flags = 0; |
9b405f1a PS |
1150 | |
1151 | nla_for_each_nested(a, attr, rem) { | |
1152 | int type = nla_type(a); | |
1153 | static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = { | |
1154 | [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64), | |
1155 | [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32), | |
1156 | [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32), | |
1157 | [OVS_TUNNEL_KEY_ATTR_TOS] = 1, | |
1158 | [OVS_TUNNEL_KEY_ATTR_TTL] = 1, | |
1159 | [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0, | |
1160 | [OVS_TUNNEL_KEY_ATTR_CSUM] = 0, | |
1161 | }; | |
1162 | ||
1163 | if (type > OVS_TUNNEL_KEY_ATTR_MAX || | |
1164 | ovs_tunnel_key_lens[type] != nla_len(a)) | |
1165 | return -EINVAL; | |
1166 | ||
1167 | switch (type) { | |
1168 | case OVS_TUNNEL_KEY_ATTR_ID: | |
a1c564be AZ |
1169 | SW_FLOW_KEY_PUT(match, tun_key.tun_id, |
1170 | nla_get_be64(a), is_mask); | |
5ebaf571 | 1171 | tun_flags |= TUNNEL_KEY; |
9b405f1a PS |
1172 | break; |
1173 | case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: | |
a1c564be AZ |
1174 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_src, |
1175 | nla_get_be32(a), is_mask); | |
9b405f1a PS |
1176 | break; |
1177 | case OVS_TUNNEL_KEY_ATTR_IPV4_DST: | |
a1c564be AZ |
1178 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst, |
1179 | nla_get_be32(a), is_mask); | |
9b405f1a PS |
1180 | break; |
1181 | case OVS_TUNNEL_KEY_ATTR_TOS: | |
a1c564be AZ |
1182 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos, |
1183 | nla_get_u8(a), is_mask); | |
9b405f1a PS |
1184 | break; |
1185 | case OVS_TUNNEL_KEY_ATTR_TTL: | |
a1c564be AZ |
1186 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl, |
1187 | nla_get_u8(a), is_mask); | |
9b405f1a PS |
1188 | ttl = true; |
1189 | break; | |
1190 | case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: | |
5ebaf571 | 1191 | tun_flags |= TUNNEL_DONT_FRAGMENT; |
9b405f1a PS |
1192 | break; |
1193 | case OVS_TUNNEL_KEY_ATTR_CSUM: | |
5ebaf571 | 1194 | tun_flags |= TUNNEL_CSUM; |
9b405f1a PS |
1195 | break; |
1196 | default: | |
1197 | return -EINVAL; | |
9b405f1a PS |
1198 | } |
1199 | } | |
a1c564be AZ |
1200 | |
1201 | SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask); | |
1202 | ||
9b405f1a PS |
1203 | if (rem > 0) |
1204 | return -EINVAL; | |
1205 | ||
a1c564be | 1206 | if (!match->key->tun_key.ipv4_dst) |
9b405f1a PS |
1207 | return -EINVAL; |
1208 | ||
1209 | if (!ttl) | |
1210 | return -EINVAL; | |
1211 | ||
1212 | return 0; | |
1213 | } | |
1214 | ||
1215 | int ipv4_tun_to_nlattr(struct sk_buff *skb, | |
a1c564be AZ |
1216 | const struct ovs_key_ipv4_tunnel *tun_key, |
1217 | const struct ovs_key_ipv4_tunnel *output) | |
9b405f1a PS |
1218 | { |
1219 | struct nlattr *nla; | |
1220 | ||
1221 | nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL); | |
1222 | if (!nla) | |
1223 | return -EMSGSIZE; | |
1224 | ||
5ebaf571 | 1225 | if (tun_key->tun_flags & TUNNEL_KEY && |
a1c564be | 1226 | nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id)) |
9b405f1a PS |
1227 | return -EMSGSIZE; |
1228 | if (tun_key->ipv4_src && | |
a1c564be | 1229 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src)) |
9b405f1a | 1230 | return -EMSGSIZE; |
a1c564be | 1231 | if (nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst)) |
9b405f1a PS |
1232 | return -EMSGSIZE; |
1233 | if (tun_key->ipv4_tos && | |
a1c564be | 1234 | nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos)) |
9b405f1a | 1235 | return -EMSGSIZE; |
a1c564be | 1236 | if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl)) |
9b405f1a | 1237 | return -EMSGSIZE; |
5ebaf571 | 1238 | if ((tun_key->tun_flags & TUNNEL_DONT_FRAGMENT) && |
9b405f1a PS |
1239 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT)) |
1240 | return -EMSGSIZE; | |
5ebaf571 | 1241 | if ((tun_key->tun_flags & TUNNEL_CSUM) && |
9b405f1a PS |
1242 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM)) |
1243 | return -EMSGSIZE; | |
1244 | ||
1245 | nla_nest_end(skb, nla); | |
1246 | return 0; | |
1247 | } | |
1248 | ||
36956a7d | 1249 | |
a1c564be AZ |
1250 | static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs, |
1251 | const struct nlattr **a, bool is_mask) | |
1252 | { | |
1253 | if (*attrs & (1ULL << OVS_KEY_ATTR_PRIORITY)) { | |
1254 | SW_FLOW_KEY_PUT(match, phy.priority, | |
1255 | nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask); | |
1256 | *attrs &= ~(1ULL << OVS_KEY_ATTR_PRIORITY); | |
34118cae | 1257 | } |
a1c564be AZ |
1258 | |
1259 | if (*attrs & (1ULL << OVS_KEY_ATTR_IN_PORT)) { | |
34118cae | 1260 | u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); |
a1c564be AZ |
1261 | |
1262 | if (!is_mask && in_port >= DP_MAX_PORTS) | |
34118cae | 1263 | return -EINVAL; |
a1c564be AZ |
1264 | SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask); |
1265 | *attrs &= ~(1ULL << OVS_KEY_ATTR_IN_PORT); | |
34118cae | 1266 | } |
a1c564be AZ |
1267 | |
1268 | if (*attrs & (1ULL << OVS_KEY_ATTR_SKB_MARK)) { | |
72e8bf28 AA |
1269 | uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); |
1270 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) && !defined(CONFIG_NETFILTER) | |
a1c564be | 1271 | if (!is_mask && mark != 0) |
72e8bf28 AA |
1272 | return -EINVAL; |
1273 | #endif | |
a1c564be AZ |
1274 | SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask); |
1275 | *attrs &= ~(1ULL << OVS_KEY_ATTR_SKB_MARK); | |
1276 | } | |
1277 | if (*attrs & (1ULL << OVS_KEY_ATTR_TUNNEL)) { | |
1278 | if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match, | |
1279 | is_mask)) | |
1280 | return -EINVAL; | |
1281 | *attrs &= ~(1ULL << OVS_KEY_ATTR_TUNNEL); | |
72e8bf28 | 1282 | } |
a1c564be AZ |
1283 | return 0; |
1284 | } | |
36956a7d | 1285 | |
a1c564be AZ |
1286 | static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs, |
1287 | const struct nlattr **a, bool is_mask) | |
1288 | { | |
1289 | int err; | |
5c7f5883 | 1290 | |
a1c564be AZ |
1291 | err = metadata_from_nlattrs(match, &attrs, a, is_mask); |
1292 | if (err) | |
1293 | return err; | |
76abe283 | 1294 | |
a1c564be AZ |
1295 | if (attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) { |
1296 | const struct ovs_key_ethernet *eth_key; | |
36956a7d | 1297 | |
a1c564be AZ |
1298 | eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); |
1299 | SW_FLOW_KEY_MEMCPY(match, eth.src, | |
1300 | eth_key->eth_src, ETH_ALEN, is_mask); | |
1301 | SW_FLOW_KEY_MEMCPY(match, eth.dst, | |
1302 | eth_key->eth_dst, ETH_ALEN, is_mask); | |
1303 | attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERNET); | |
1304 | } | |
76abe283 | 1305 | |
a1c564be | 1306 | if (attrs & (1ULL << OVS_KEY_ATTR_VLAN)) { |
8ddc056d BP |
1307 | __be16 tci; |
1308 | ||
a1c564be AZ |
1309 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); |
1310 | if (!is_mask && (tci & htons(VLAN_TAG_PRESENT))) | |
34118cae | 1311 | return -EINVAL; |
36956a7d | 1312 | |
a1c564be AZ |
1313 | SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask); |
1314 | attrs &= ~(1ULL << OVS_KEY_ATTR_VLAN); | |
1315 | } | |
8ddc056d | 1316 | |
a1c564be AZ |
1317 | if (attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) { |
1318 | __be16 eth_type; | |
8ddc056d | 1319 | |
a1c564be AZ |
1320 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); |
1321 | if (!is_mask && ntohs(eth_type) < ETH_P_802_3_MIN) | |
8ddc056d | 1322 | return -EINVAL; |
a1c564be AZ |
1323 | |
1324 | SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask); | |
1325 | attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
1326 | } else if (!is_mask) { | |
1327 | SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask); | |
34118cae BP |
1328 | } |
1329 | ||
a1c564be AZ |
1330 | if (attrs & (1ULL << OVS_KEY_ATTR_IPV4)) { |
1331 | const struct ovs_key_ipv4 *ipv4_key; | |
1332 | ||
1333 | ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); | |
1334 | if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) | |
34118cae | 1335 | return -EINVAL; |
a1c564be AZ |
1336 | SW_FLOW_KEY_PUT(match, ip.proto, |
1337 | ipv4_key->ipv4_proto, is_mask); | |
1338 | SW_FLOW_KEY_PUT(match, ip.tos, | |
1339 | ipv4_key->ipv4_tos, is_mask); | |
1340 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
1341 | ipv4_key->ipv4_ttl, is_mask); | |
1342 | SW_FLOW_KEY_PUT(match, ip.frag, | |
1343 | ipv4_key->ipv4_frag, is_mask); | |
1344 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
1345 | ipv4_key->ipv4_src, is_mask); | |
1346 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
1347 | ipv4_key->ipv4_dst, is_mask); | |
1348 | attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4); | |
34118cae BP |
1349 | } |
1350 | ||
a1c564be AZ |
1351 | if (attrs & (1ULL << OVS_KEY_ATTR_IPV6)) { |
1352 | const struct ovs_key_ipv6 *ipv6_key; | |
685a51a5 | 1353 | |
a1c564be AZ |
1354 | ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); |
1355 | if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) | |
34118cae | 1356 | return -EINVAL; |
a1c564be AZ |
1357 | SW_FLOW_KEY_PUT(match, ipv6.label, |
1358 | ipv6_key->ipv6_label, is_mask); | |
1359 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1360 | ipv6_key->ipv6_proto, is_mask); | |
1361 | SW_FLOW_KEY_PUT(match, ip.tos, | |
1362 | ipv6_key->ipv6_tclass, is_mask); | |
1363 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
1364 | ipv6_key->ipv6_hlimit, is_mask); | |
1365 | SW_FLOW_KEY_PUT(match, ip.frag, | |
1366 | ipv6_key->ipv6_frag, is_mask); | |
1367 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src, | |
1368 | ipv6_key->ipv6_src, | |
1369 | sizeof(match->key->ipv6.addr.src), | |
1370 | is_mask); | |
1371 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst, | |
1372 | ipv6_key->ipv6_dst, | |
1373 | sizeof(match->key->ipv6.addr.dst), | |
1374 | is_mask); | |
1375 | ||
1376 | attrs &= ~(1ULL << OVS_KEY_ATTR_IPV6); | |
1377 | } | |
34118cae | 1378 | |
a1c564be AZ |
1379 | if (attrs & (1ULL << OVS_KEY_ATTR_ARP)) { |
1380 | const struct ovs_key_arp *arp_key; | |
1381 | ||
1382 | arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); | |
1383 | if (!is_mask && (arp_key->arp_op & htons(0xff00))) | |
34118cae | 1384 | return -EINVAL; |
a1c564be AZ |
1385 | |
1386 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
1387 | arp_key->arp_sip, is_mask); | |
1388 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
1389 | arp_key->arp_tip, is_mask); | |
1390 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1391 | ntohs(arp_key->arp_op), is_mask); | |
1392 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha, | |
1393 | arp_key->arp_sha, ETH_ALEN, is_mask); | |
1394 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha, | |
1395 | arp_key->arp_tha, ETH_ALEN, is_mask); | |
1396 | ||
1397 | attrs &= ~(1ULL << OVS_KEY_ATTR_ARP); | |
1398 | } | |
1399 | ||
1400 | if (attrs & (1ULL << OVS_KEY_ATTR_TCP)) { | |
1401 | const struct ovs_key_tcp *tcp_key; | |
1402 | ||
1403 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); | |
1404 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1405 | tcp_key->tcp_src, is_mask); | |
1406 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1407 | tcp_key->tcp_dst, is_mask); | |
1408 | attrs &= ~(1ULL << OVS_KEY_ATTR_TCP); | |
1409 | } | |
1410 | ||
1411 | if (attrs & (1ULL << OVS_KEY_ATTR_UDP)) { | |
1412 | const struct ovs_key_udp *udp_key; | |
1413 | ||
1414 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); | |
1415 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1416 | udp_key->udp_src, is_mask); | |
1417 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1418 | udp_key->udp_dst, is_mask); | |
1419 | attrs &= ~(1ULL << OVS_KEY_ATTR_UDP); | |
1420 | } | |
1421 | ||
1422 | if (attrs & (1ULL << OVS_KEY_ATTR_ICMP)) { | |
1423 | const struct ovs_key_icmp *icmp_key; | |
1424 | ||
1425 | icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); | |
1426 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1427 | htons(icmp_key->icmp_type), is_mask); | |
1428 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1429 | htons(icmp_key->icmp_code), is_mask); | |
1430 | attrs &= ~(1ULL << OVS_KEY_ATTR_ICMP); | |
1431 | } | |
1432 | ||
1433 | if (attrs & (1ULL << OVS_KEY_ATTR_ICMPV6)) { | |
1434 | const struct ovs_key_icmpv6 *icmpv6_key; | |
1435 | ||
1436 | icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); | |
1437 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1438 | htons(icmpv6_key->icmpv6_type), is_mask); | |
1439 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1440 | htons(icmpv6_key->icmpv6_code), is_mask); | |
1441 | attrs &= ~(1ULL << OVS_KEY_ATTR_ICMPV6); | |
1442 | } | |
1443 | ||
1444 | if (attrs & (1ULL << OVS_KEY_ATTR_ND)) { | |
1445 | const struct ovs_key_nd *nd_key; | |
1446 | ||
1447 | nd_key = nla_data(a[OVS_KEY_ATTR_ND]); | |
1448 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target, | |
1449 | nd_key->nd_target, | |
1450 | sizeof(match->key->ipv6.nd.target), | |
1451 | is_mask); | |
1452 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll, | |
1453 | nd_key->nd_sll, ETH_ALEN, is_mask); | |
1454 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll, | |
1455 | nd_key->nd_tll, ETH_ALEN, is_mask); | |
1456 | attrs &= ~(1ULL << OVS_KEY_ATTR_ND); | |
1457 | } | |
1458 | ||
1459 | if (attrs != 0) | |
1460 | return -EINVAL; | |
1461 | ||
1462 | return 0; | |
1463 | } | |
1464 | ||
1465 | /** | |
1466 | * ovs_match_from_nlattrs - parses Netlink attributes into a flow key and | |
1467 | * mask. In case the 'mask' is NULL, the flow is treated as exact match | |
1468 | * flow. Otherwise, it is treated as a wildcarded flow, except the mask | |
1469 | * does not include any don't care bit. | |
1470 | * @match: receives the extracted flow match information. | |
1471 | * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute | |
1472 | * sequence. The fields should of the packet that triggered the creation | |
1473 | * of this flow. | |
1474 | * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink | |
1475 | * attribute specifies the mask field of the wildcarded flow. | |
1476 | */ | |
1477 | int ovs_match_from_nlattrs(struct sw_flow_match *match, | |
1478 | const struct nlattr *key, | |
1479 | const struct nlattr *mask) | |
1480 | { | |
1481 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; | |
a1c564be AZ |
1482 | const struct nlattr *encap; |
1483 | u64 key_attrs = 0; | |
1484 | u64 mask_attrs = 0; | |
1485 | bool encap_valid = false; | |
1486 | int err; | |
1487 | ||
1488 | err = parse_flow_nlattrs(key, a, &key_attrs); | |
1489 | if (err) | |
1490 | return err; | |
1491 | ||
1492 | if (key_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) { | |
1493 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
1494 | key_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP); | |
1495 | if (nla_len(encap)) { | |
1496 | __be16 eth_type = 0; /* ETH_P_8021Q */ | |
1497 | ||
1498 | if (a[OVS_KEY_ATTR_ETHERTYPE]) | |
1499 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
1500 | ||
1501 | if ((eth_type == htons(ETH_P_8021Q)) && (a[OVS_KEY_ATTR_VLAN])) { | |
1502 | encap_valid = true; | |
1503 | key_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
1504 | err = parse_flow_nlattrs(encap, a, &key_attrs); | |
1505 | } else | |
1506 | err = -EINVAL; | |
1507 | ||
34118cae BP |
1508 | if (err) |
1509 | return err; | |
36956a7d | 1510 | } |
a1c564be | 1511 | } |
36956a7d | 1512 | |
a1c564be AZ |
1513 | err = ovs_key_from_nlattrs(match, key_attrs, a, false); |
1514 | if (err) | |
1515 | return err; | |
1516 | ||
1517 | if (mask) { | |
1a02b768 | 1518 | err = parse_flow_mask_nlattrs(mask, a, &mask_attrs); |
a1c564be AZ |
1519 | if (err) |
1520 | return err; | |
1521 | ||
1522 | if ((mask_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) && encap_valid) { | |
1523 | __be16 eth_type = 0; | |
1524 | ||
1a02b768 JG |
1525 | if (a[OVS_KEY_ATTR_ETHERTYPE]) |
1526 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
a1c564be AZ |
1527 | if (eth_type == htons(0xffff)) { |
1528 | mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
1a02b768 JG |
1529 | encap = a[OVS_KEY_ATTR_ENCAP]; |
1530 | err = parse_flow_mask_nlattrs(encap, a, &mask_attrs); | |
a1c564be AZ |
1531 | } else |
1532 | err = -EINVAL; | |
34118cae | 1533 | |
34118cae BP |
1534 | if (err) |
1535 | return err; | |
1536 | } | |
36956a7d | 1537 | |
1a02b768 | 1538 | err = ovs_key_from_nlattrs(match, mask_attrs, a, true); |
a1c564be AZ |
1539 | if (err) |
1540 | return err; | |
1541 | } else { | |
1542 | /* Populate exact match flow's key mask. */ | |
1543 | if (match->mask) | |
1544 | ovs_sw_flow_mask_set(match->mask, &match->range, 0xff); | |
34118cae | 1545 | } |
76abe283 | 1546 | |
a1c564be | 1547 | if (!ovs_match_validate(match, key_attrs, mask_attrs)) |
34118cae | 1548 | return -EINVAL; |
34118cae BP |
1549 | |
1550 | return 0; | |
36956a7d BP |
1551 | } |
1552 | ||
80e5eed9 | 1553 | /** |
850b6b3b | 1554 | * ovs_flow_metadata_from_nlattrs - parses Netlink attributes into a flow key. |
c3b36027 | 1555 | * @flow: Receives extracted in_port, priority, tun_key and skb_mark. |
c3b36027 | 1556 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
80e5eed9 BP |
1557 | * sequence. |
1558 | * | |
1559 | * This parses a series of Netlink attributes that form a flow key, which must | |
1560 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to | |
1561 | * get the metadata, that is, the parts of the flow key that cannot be | |
1562 | * extracted from the packet itself. | |
1563 | */ | |
13e24889 | 1564 | |
a1c564be AZ |
1565 | int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow, |
1566 | const struct nlattr *attr) | |
80e5eed9 | 1567 | { |
6694e498 | 1568 | struct ovs_key_ipv4_tunnel *tun_key = &flow->key.tun_key; |
a1c564be AZ |
1569 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; |
1570 | u64 attrs = 0; | |
1571 | int err; | |
1572 | struct sw_flow_match match; | |
80e5eed9 | 1573 | |
13e24889 PS |
1574 | flow->key.phy.in_port = DP_MAX_PORTS; |
1575 | flow->key.phy.priority = 0; | |
72e8bf28 | 1576 | flow->key.phy.skb_mark = 0; |
6694e498 | 1577 | memset(tun_key, 0, sizeof(flow->key.tun_key)); |
80e5eed9 | 1578 | |
a1c564be AZ |
1579 | err = parse_flow_nlattrs(attr, a, &attrs); |
1580 | if (err) | |
80e5eed9 | 1581 | return -EINVAL; |
13e24889 | 1582 | |
a1c564be AZ |
1583 | ovs_match_init(&match, &flow->key, NULL); |
1584 | ||
1585 | err = metadata_from_nlattrs(&match, &attrs, a, false); | |
1586 | if (err) | |
1587 | return err; | |
13e24889 | 1588 | |
80e5eed9 BP |
1589 | return 0; |
1590 | } | |
1591 | ||
a1c564be AZ |
1592 | int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey, |
1593 | const struct sw_flow_key *output, struct sk_buff *skb) | |
36956a7d | 1594 | { |
df2c07f4 | 1595 | struct ovs_key_ethernet *eth_key; |
fea393b1 | 1596 | struct nlattr *nla, *encap; |
36956a7d | 1597 | |
c3cc8c03 | 1598 | if (swkey->phy.priority && |
a1c564be | 1599 | nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority)) |
c3cc8c03 | 1600 | goto nla_put_failure; |
18c43631 | 1601 | |
9b405f1a | 1602 | if (swkey->tun_key.ipv4_dst && |
a1c564be | 1603 | ipv4_tun_to_nlattr(skb, &swkey->tun_key, &output->tun_key)) |
9b405f1a PS |
1604 | goto nla_put_failure; |
1605 | ||
a1c564be AZ |
1606 | if (swkey->phy.in_port != DP_MAX_PORTS) { |
1607 | /* Exact match upper 16 bits. */ | |
1608 | u16 upper_u16; | |
1609 | upper_u16 = (swkey == output) ? 0 : 0xffff; | |
1610 | ||
1611 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, | |
1612 | (upper_u16 << 16) | output->phy.in_port)) | |
1613 | goto nla_put_failure; | |
1614 | } | |
36956a7d | 1615 | |
72e8bf28 | 1616 | if (swkey->phy.skb_mark && |
a1c564be | 1617 | nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) |
72e8bf28 AA |
1618 | goto nla_put_failure; |
1619 | ||
df2c07f4 | 1620 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); |
d6569377 BP |
1621 | if (!nla) |
1622 | goto nla_put_failure; | |
a1c564be | 1623 | |
d6569377 | 1624 | eth_key = nla_data(nla); |
a1c564be AZ |
1625 | memcpy(eth_key->eth_src, output->eth.src, ETH_ALEN); |
1626 | memcpy(eth_key->eth_dst, output->eth.dst, ETH_ALEN); | |
36956a7d | 1627 | |
8ddc056d | 1628 | if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) { |
a1c564be AZ |
1629 | __be16 eth_type; |
1630 | eth_type = (swkey == output) ? htons(ETH_P_8021Q) : htons(0xffff) ; | |
1631 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) || | |
1632 | nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci)) | |
c3cc8c03 | 1633 | goto nla_put_failure; |
fea393b1 | 1634 | encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); |
8ddc056d BP |
1635 | if (!swkey->eth.tci) |
1636 | goto unencap; | |
a1c564be | 1637 | } else |
fea393b1 | 1638 | encap = NULL; |
36956a7d | 1639 | |
a1c564be | 1640 | if ((swkey == output) && (swkey->eth.type == htons(ETH_P_802_2))) |
fea393b1 | 1641 | goto unencap; |
36956a7d | 1642 | |
a1c564be AZ |
1643 | if (output->eth.type != 0) |
1644 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type)) | |
1645 | goto nla_put_failure; | |
36956a7d | 1646 | |
76abe283 | 1647 | if (swkey->eth.type == htons(ETH_P_IP)) { |
df2c07f4 | 1648 | struct ovs_key_ipv4 *ipv4_key; |
36956a7d | 1649 | |
df2c07f4 | 1650 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); |
d6569377 BP |
1651 | if (!nla) |
1652 | goto nla_put_failure; | |
1653 | ipv4_key = nla_data(nla); | |
a1c564be AZ |
1654 | ipv4_key->ipv4_src = output->ipv4.addr.src; |
1655 | ipv4_key->ipv4_dst = output->ipv4.addr.dst; | |
1656 | ipv4_key->ipv4_proto = output->ip.proto; | |
1657 | ipv4_key->ipv4_tos = output->ip.tos; | |
1658 | ipv4_key->ipv4_ttl = output->ip.ttl; | |
1659 | ipv4_key->ipv4_frag = output->ip.frag; | |
76abe283 | 1660 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
df2c07f4 | 1661 | struct ovs_key_ipv6 *ipv6_key; |
d31f1109 | 1662 | |
df2c07f4 | 1663 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); |
d31f1109 JP |
1664 | if (!nla) |
1665 | goto nla_put_failure; | |
1666 | ipv6_key = nla_data(nla); | |
a1c564be | 1667 | memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src, |
d31f1109 | 1668 | sizeof(ipv6_key->ipv6_src)); |
a1c564be | 1669 | memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst, |
d31f1109 | 1670 | sizeof(ipv6_key->ipv6_dst)); |
a1c564be AZ |
1671 | ipv6_key->ipv6_label = output->ipv6.label; |
1672 | ipv6_key->ipv6_proto = output->ip.proto; | |
1673 | ipv6_key->ipv6_tclass = output->ip.tos; | |
1674 | ipv6_key->ipv6_hlimit = output->ip.ttl; | |
1675 | ipv6_key->ipv6_frag = output->ip.frag; | |
8087f5ff MM |
1676 | } else if (swkey->eth.type == htons(ETH_P_ARP) || |
1677 | swkey->eth.type == htons(ETH_P_RARP)) { | |
df2c07f4 | 1678 | struct ovs_key_arp *arp_key; |
d31f1109 | 1679 | |
df2c07f4 | 1680 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); |
d31f1109 JP |
1681 | if (!nla) |
1682 | goto nla_put_failure; | |
1683 | arp_key = nla_data(nla); | |
df2c07f4 | 1684 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); |
a1c564be AZ |
1685 | arp_key->arp_sip = output->ipv4.addr.src; |
1686 | arp_key->arp_tip = output->ipv4.addr.dst; | |
1687 | arp_key->arp_op = htons(output->ip.proto); | |
1688 | memcpy(arp_key->arp_sha, output->ipv4.arp.sha, ETH_ALEN); | |
1689 | memcpy(arp_key->arp_tha, output->ipv4.arp.tha, ETH_ALEN); | |
d31f1109 JP |
1690 | } |
1691 | ||
7257b535 BP |
1692 | if ((swkey->eth.type == htons(ETH_P_IP) || |
1693 | swkey->eth.type == htons(ETH_P_IPV6)) && | |
9e44d715 | 1694 | swkey->ip.frag != OVS_FRAG_TYPE_LATER) { |
36956a7d | 1695 | |
28bad473 | 1696 | if (swkey->ip.proto == IPPROTO_TCP) { |
df2c07f4 | 1697 | struct ovs_key_tcp *tcp_key; |
36956a7d | 1698 | |
df2c07f4 | 1699 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); |
d6569377 BP |
1700 | if (!nla) |
1701 | goto nla_put_failure; | |
1702 | tcp_key = nla_data(nla); | |
76abe283 | 1703 | if (swkey->eth.type == htons(ETH_P_IP)) { |
a1c564be AZ |
1704 | tcp_key->tcp_src = output->ipv4.tp.src; |
1705 | tcp_key->tcp_dst = output->ipv4.tp.dst; | |
76abe283 | 1706 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
a1c564be AZ |
1707 | tcp_key->tcp_src = output->ipv6.tp.src; |
1708 | tcp_key->tcp_dst = output->ipv6.tp.dst; | |
76abe283 | 1709 | } |
28bad473 | 1710 | } else if (swkey->ip.proto == IPPROTO_UDP) { |
df2c07f4 | 1711 | struct ovs_key_udp *udp_key; |
36956a7d | 1712 | |
df2c07f4 | 1713 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); |
d6569377 BP |
1714 | if (!nla) |
1715 | goto nla_put_failure; | |
1716 | udp_key = nla_data(nla); | |
76abe283 | 1717 | if (swkey->eth.type == htons(ETH_P_IP)) { |
a1c564be AZ |
1718 | udp_key->udp_src = output->ipv4.tp.src; |
1719 | udp_key->udp_dst = output->ipv4.tp.dst; | |
76abe283 | 1720 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
a1c564be AZ |
1721 | udp_key->udp_src = output->ipv6.tp.src; |
1722 | udp_key->udp_dst = output->ipv6.tp.dst; | |
76abe283 AE |
1723 | } |
1724 | } else if (swkey->eth.type == htons(ETH_P_IP) && | |
28bad473 | 1725 | swkey->ip.proto == IPPROTO_ICMP) { |
df2c07f4 | 1726 | struct ovs_key_icmp *icmp_key; |
36956a7d | 1727 | |
df2c07f4 | 1728 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); |
d6569377 BP |
1729 | if (!nla) |
1730 | goto nla_put_failure; | |
1731 | icmp_key = nla_data(nla); | |
a1c564be AZ |
1732 | icmp_key->icmp_type = ntohs(output->ipv4.tp.src); |
1733 | icmp_key->icmp_code = ntohs(output->ipv4.tp.dst); | |
76abe283 | 1734 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && |
28bad473 | 1735 | swkey->ip.proto == IPPROTO_ICMPV6) { |
df2c07f4 | 1736 | struct ovs_key_icmpv6 *icmpv6_key; |
36956a7d | 1737 | |
df2c07f4 | 1738 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, |
bfef4717 | 1739 | sizeof(*icmpv6_key)); |
d31f1109 JP |
1740 | if (!nla) |
1741 | goto nla_put_failure; | |
1742 | icmpv6_key = nla_data(nla); | |
a1c564be AZ |
1743 | icmpv6_key->icmpv6_type = ntohs(output->ipv6.tp.src); |
1744 | icmpv6_key->icmpv6_code = ntohs(output->ipv6.tp.dst); | |
685a51a5 | 1745 | |
bfef4717 JG |
1746 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || |
1747 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
df2c07f4 | 1748 | struct ovs_key_nd *nd_key; |
685a51a5 | 1749 | |
df2c07f4 | 1750 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); |
685a51a5 JP |
1751 | if (!nla) |
1752 | goto nla_put_failure; | |
1753 | nd_key = nla_data(nla); | |
a1c564be | 1754 | memcpy(nd_key->nd_target, &output->ipv6.nd.target, |
685a51a5 | 1755 | sizeof(nd_key->nd_target)); |
a1c564be AZ |
1756 | memcpy(nd_key->nd_sll, output->ipv6.nd.sll, ETH_ALEN); |
1757 | memcpy(nd_key->nd_tll, output->ipv6.nd.tll, ETH_ALEN); | |
685a51a5 | 1758 | } |
d31f1109 | 1759 | } |
36956a7d BP |
1760 | } |
1761 | ||
fea393b1 BP |
1762 | unencap: |
1763 | if (encap) | |
1764 | nla_nest_end(skb, encap); | |
1765 | ||
d6569377 | 1766 | return 0; |
36956a7d | 1767 | |
d6569377 BP |
1768 | nla_put_failure: |
1769 | return -EMSGSIZE; | |
8d5ebd83 JG |
1770 | } |
1771 | ||
064af421 BP |
1772 | /* Initializes the flow module. |
1773 | * Returns zero if successful or a negative error code. */ | |
850b6b3b | 1774 | int ovs_flow_init(void) |
064af421 BP |
1775 | { |
1776 | flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow), 0, | |
1777 | 0, NULL); | |
1778 | if (flow_cache == NULL) | |
1779 | return -ENOMEM; | |
1780 | ||
1781 | return 0; | |
1782 | } | |
1783 | ||
1784 | /* Uninitializes the flow module. */ | |
850b6b3b | 1785 | void ovs_flow_exit(void) |
064af421 BP |
1786 | { |
1787 | kmem_cache_destroy(flow_cache); | |
1788 | } | |
a1c564be AZ |
1789 | |
1790 | struct sw_flow_mask *ovs_sw_flow_mask_alloc(void) | |
1791 | { | |
1792 | struct sw_flow_mask *mask; | |
1793 | ||
1794 | mask = kmalloc(sizeof(*mask), GFP_KERNEL); | |
1795 | if (mask) | |
1796 | mask->ref_count = 0; | |
1797 | ||
1798 | return mask; | |
1799 | } | |
1800 | ||
1801 | void ovs_sw_flow_mask_add_ref(struct sw_flow_mask *mask) | |
1802 | { | |
1803 | mask->ref_count++; | |
1804 | } | |
1805 | ||
1806 | static void rcu_free_sw_flow_mask_cb(struct rcu_head *rcu) | |
1807 | { | |
1808 | struct sw_flow_mask *mask = container_of(rcu, struct sw_flow_mask, rcu); | |
1809 | ||
1810 | kfree(mask); | |
1811 | } | |
1812 | ||
1813 | void ovs_sw_flow_mask_del_ref(struct sw_flow_mask *mask, bool deferred) | |
1814 | { | |
1815 | if (!mask) | |
1816 | return; | |
1817 | ||
1818 | BUG_ON(!mask->ref_count); | |
1819 | mask->ref_count--; | |
1820 | ||
1821 | if (!mask->ref_count) { | |
1822 | list_del_rcu(&mask->list); | |
1823 | if (deferred) | |
1824 | call_rcu(&mask->rcu, rcu_free_sw_flow_mask_cb); | |
1825 | else | |
1826 | kfree(mask); | |
1827 | } | |
1828 | } | |
1829 | ||
1830 | static bool ovs_sw_flow_mask_equal(const struct sw_flow_mask *a, | |
1831 | const struct sw_flow_mask *b) | |
1832 | { | |
1833 | u8 *a_ = (u8 *)&a->key + a->range.start; | |
1834 | u8 *b_ = (u8 *)&b->key + b->range.start; | |
1835 | ||
1836 | return (a->range.end == b->range.end) | |
1837 | && (a->range.start == b->range.start) | |
1838 | && (memcmp(a_, b_, ovs_sw_flow_mask_actual_size(a)) == 0); | |
1839 | } | |
1840 | ||
1841 | struct sw_flow_mask *ovs_sw_flow_mask_find(const struct flow_table *tbl, | |
1842 | const struct sw_flow_mask *mask) | |
1843 | { | |
1844 | struct list_head *ml; | |
1845 | ||
1846 | list_for_each(ml, &tbl->mask_list) { | |
1847 | struct sw_flow_mask *m; | |
1848 | m = container_of(ml, struct sw_flow_mask, list); | |
1849 | if (ovs_sw_flow_mask_equal(mask, m)) | |
1850 | return m; | |
1851 | } | |
1852 | ||
1853 | return NULL; | |
1854 | } | |
1855 | ||
1856 | /** | |
1857 | * add a new mask into the mask list. | |
1858 | * The caller needs to make sure that 'mask' is not the same | |
1859 | * as any masks that are already on the list. | |
1860 | */ | |
1861 | void ovs_sw_flow_mask_insert(struct flow_table *tbl, struct sw_flow_mask *mask) | |
1862 | { | |
1863 | list_add_rcu(&mask->list, &tbl->mask_list); | |
1864 | } | |
1865 | ||
1866 | /** | |
1867 | * Set 'range' fields in the mask to the value of 'val'. | |
1868 | */ | |
1869 | static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask, | |
1870 | struct sw_flow_key_range *range, u8 val) | |
1871 | { | |
1872 | u8 *m = (u8 *)&mask->key + range->start; | |
1873 | ||
1874 | mask->range = *range; | |
1875 | memset(m, val, ovs_sw_flow_mask_size_roundup(mask)); | |
1876 | } |